WO2019194118A1

WO2019194118A1 - Pull-on disposable diaper

Info

Publication number: WO2019194118A1
Application number: PCT/JP2019/014440
Authority: WO
Inventors: 賢一笹山; 圭村上; 唯永山; 大貴近藤
Original assignee: ユニ・チャーム株式会社
Priority date: 2018-04-03
Filing date: 2019-04-01
Publication date: 2019-10-10
Also published as: CN114376799B; CN111936097A; CN114376798B; CN111936097B; TW202002924A; TWI832852B; CN114376798A; CN114376799A

Abstract

A pull-on disposable diaper (1) is provided with a front-side belt section (21), a rear-side belt section (22), and an absorbent core (11), wherein: a base region (21s) and a high-pressure region (30s) are provided; and the high-pressure region (30s) is disposed circumferentially across the front-side belt section (21) and the rear-side belt section (22), includes a stretchable film (30) between skin-side non-woven fabric (213, 223) and non-skin-side non-woven fabric (214, 224), includes a ventilation section (34) that has better ventilation properties than the portion where the stretchable film (30) is located, and does not overlap with the absorbent core (11) in at least the front-side belt section (21) or the rear-side belt section (22).

Description

Pants-type disposable diaper

The present invention relates to a pants-type disposable diaper.

As a first background art, Patent Document 1 describes a pants-type disposable diaper in which both side edges of the abdominal side and both side edges of the back side are joined together. A first body elastic member and a second body elastic member are provided on the back side portion so as to overlap an auxiliary body elastic member arranged in parallel to the width direction (left-right direction) of the diaper. The 1st trunk | drum elastic member and the 2nd trunk | drum elastic member are distribute | arranged so that the cross | intersection part may contact | abut a wearer's greater trochanter when a diaper is worn.
In Patent Document 2, a stretchable sheet is arranged separately from the two sheets of the outer packaging material of the pants-type disposable diaper to form a high wearing pressure region. The high wearing pressure region is arranged so as to abut on a site from the wearer's iliac crest to the upper anterior iliac spine.
As in

Patent Documents

1 and 2, by partially increasing the adhesion of the abdomen and back sides (front belt part and rear belt part) of the diaper, the fit of the diaper is enhanced and slippage is suppressed. it can.

As a second background art, Patent Literature 1 discloses a pants-type disposable diaper in which both side edges of the abdominal side and both side edges of the back side are joined to each other. The back side part of the diaper of patent document 1 is equipped with the 1st trunk | drum elastic member and the 2nd trunk | drum elastic member. The first torso elastic member and the second torso elastic member are arranged so that the intersections thereof are in contact with the wearer's greater trochanter. By doing so, it is said that even if the diaper does not have a leg-hole elastic member, the diaper does not fall off and can be prevented from leaking.

As a third background art, Patent Document 2 discloses a pants-type disposable diaper provided with an absorbent main body and an outer packaging material fixing the absorbent main body. The outer packaging material of the diaper of Patent Document 2 has a structure in which two sheets are laminated, and has a high mounting pressure region in which a stretchable sheet different from the two sheets is arranged. This high wearing pressure region can be effectively prevented from slipping during wearing of the diaper by bringing the high wearing pressure region into contact with a site from the wearer's iliac crest to the upper anterior iliac crest.

Patent No. 5107760 Patent No. 5020362

The problem to be solved by the present invention is at least one of the following first to second problems.
In the 1st subject, in patent documents 1, the form of all the elastic members is made into thread form (string form). Therefore, the site | part on which the thread-like elastic member is overlaid is in close contact with the wearer locally, and it becomes easy for the elastic member to have a mark (rubber mark) on the wearer's skin.
When the high attachment pressure region is formed of a stretchable sheet as in Patent Document 2, it is difficult for the elastic member (stretchable member) to be marked. Although an elastic film is mentioned as an example of an elastic sheet, the breathability of an elastic film is bad. Therefore, as in Patent Document 2, if the stretchable film is arranged in the high mounting pressure region without a gap, the air permeability in the high mounting pressure region is lowered. Furthermore, in patent document 2, the stretchable film is exposed to the wearer's skin side. Therefore, the stretchable film easily adheres along the wearer's skin without a gap, and the air permeability is further lowered.

The present invention has been made in view of the above-described problems, and partially improves the adhesion of the front belt portion and the rear belt portion, while suppressing the trace of the stretchable member and the decrease in air permeability. The purpose is to provide disposable pants-type disposable diapers.

In the second problem, the first body elastic member of the diaper of Patent Document 1 extends from the edge of the leg opening toward the edge of the waist opening. That is, one end of the first body elastic member is positioned at the leg opening and contracts to widen the leg opening. Therefore, in the first body elastic member, it is difficult to obtain a tightening force enough to support the wearer's movement (muscle strength).
The second body elastic member extends from the side edge of the back side toward the center of the back side near the crotch. In other words, the second torso elastic member is located at a site that contacts the greater gluteal muscle where muscles and skin stretch and contraction are large due to the movement of the wearer. Therefore, friction is easily generated between the wearer and the diaper due to the operation of the wearer, and the wearing comfort of the diaper is reduced.

The present invention has been made in view of the above problems, and an object thereof is to provide a pants-type disposable diaper that is comfortable to wear while supporting the operation of the wearer.

In the third problem, when the wearer or the assistant of the diaper cannot grasp the position of the high wearing pressure region (high pressure region), the diaper is pulled up so that the high wearing pressure region is positioned at an appropriate position of the wearer. It is difficult to adjust the condition. If it does so, there exists a possibility that the effect by a high mounting | wearing pressure area | region may not be acquired. On the contrary, there is a possibility that the high wearing pressure region is located in a place where it should not be tightened (for example, a bulging portion of the lower abdomen or the buttocks), and the comfort of wearing the diaper may be reduced.

The present invention has been made in view of the above-described problems, and an object of the present invention is to allow a pants-type disposable diaper having a high pressure region to be worn at an appropriate position of the wearer.

The main invention for achieving the first object is as follows:
Having a vertical direction, a horizontal direction and a front-rear direction intersecting each other;
A front belt portion, a rear belt portion, and an absorbent main body having an absorbent core;
A pants-type disposable diaper in which a waistline opening is formed at the upper end by the front belt portion and the rear belt portion,
The front belt portion and the rear belt portion are
A skin-side nonwoven fabric positioned closest to the skin, a non-skin-side nonwoven fabric positioned closest to the non-skin side, and a stretchable member that expands and contracts in the left-right direction, and
A stretchable region along an edge of the waistline opening;
A base region adjacent to the stretchable region at the center in the left-right direction of the front belt portion from below;
A high pressure region provided below the stretchable region,
The force for extending the high pressure region of unit width in the left-right direction by a unit length is greater than the force for extending the base region of unit width in the left-right direction,
The high pressure region is
It is provided in a circumferential shape across the front belt portion and the rear belt portion,
Having a stretchable film between the skin-side nonwoven fabric and the non-skin-side nonwoven fabric, and
Compared to the part where the stretchable film is located, it has a breathable part with good ventilation,
The pants-type disposable diaper is characterized in that at least one of the front belt portion and the rear belt portion does not overlap the absorbent core in the front-rear direction.

The main invention for achieving the second object has a vertical direction, a horizontal direction, and a front-rear direction that intersect with each other, and the both sides in the left-right direction of the front belt part and the left-right direction of the rear belt part. Both sides are pants-type disposable diapers locked in a pair of locking portions, the rear belt portion has a low pressure region and a high pressure region, the low pressure region, and The high-pressure region has elasticity in the left-right direction, and the force for extending the high-pressure region having a unit width in the up-down direction by a unit length in the left-right direction is low in the unit width. The pressure region is larger than the force for extending the unit length in the left-right direction, and the high pressure region is continuously arranged in the left-right direction across the pair of locking portions, The left and right ends of the high pressure region Compared with the central portion, the length of the high pressure region in the vertical direction is longer, and the lower end of the high pressure region is located below, and the high pressure region has the high height region at the central portion in the left-right direction. The pants-type disposable diaper is characterized in that the low pressure region is disposed adjacent to the lower side of the pressure region.

A main invention for achieving the third object is a pants-type disposable diaper having an up-down direction, a left-right direction, and a front-rear direction intersecting each other, and having a belt portion and an absorbent main body, The portion has a low pressure region and a high pressure region below the expansion / contraction region along the edge of the waistline opening, and the low pressure region and the high pressure region are adjacent to each other and in the left-right direction The force for extending the high pressure region of the unit width in the up and down direction to the unit length in the left and right direction is the unit of the low pressure region of the unit width and the unit in the left and right direction. When the belt portion is viewed from at least one of the non-skin side and the skin side, the at least part of the high pressure region has a color different from that of the low pressure region. Pants type characterized by that It has discarded and diapers.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

The effect of this invention with respect to the 1st subject can provide the underpants type disposable diaper which suppressed the trace residue of the elastic member and the fall of air permeability, improving the adhesiveness of a front side belt part and a back side belt part partially. .

The effect of the present invention with respect to the second problem can provide a pant-type disposable diaper that is comfortable to wear while supporting the movement of the wearer.

The effect of the present invention with respect to the third problem is that a pants-type disposable diaper having a high pressure region can be worn at an appropriate position of the wearer.

1 is a schematic perspective view of a pants-type disposable diaper 1. FIG. It is a schematic plan view of the diaper 1 of the unfolded and extended state. FIG. 3 is a schematic cross-sectional view taken along line II in FIG. 2. 4A to 4C are conceptual diagrams showing a state where the diaper 1 is worn. 5A to 5B are schematic cross-sectional views of the ventral exterior body 21 and the back exterior body 22. 6A is an explanatory diagram of the high pressure region 30s, and FIG. 6B is an explanatory diagram of the ventilation portion 33 and the welding portion 40. FIG. 7A to 7C are explanatory views of a high pressure region 30s according to a modification. It is a schematic perspective view of the underpants type disposable diaper 300. It is a schematic plan view of the diaper 300 of an unfolded and extended state. FIG. 10 is a schematic cross-sectional view taken along line II in FIG. 9. FIG. 11A is a diagram illustrating an example of the joint portion 350, and FIG. 11B is a schematic cross-sectional view of the front belt portion 321 and the rear belt portion 322. 3 is a schematic plan view of a rear belt portion 322. FIG. 3 is a schematic plan view of a front belt portion 321. FIG. 14A and 14B are explanatory diagrams of the middle ankle muscle 60. FIG. It is a schematic perspective view of the underpants type disposable diaper 500. It is a schematic plan view of the diaper 500 of an unfolded and extended state. It is a schematic sectional drawing in the II line | wire of FIG. FIG. 18A is a diagram illustrating an example of a joint 530 between the front belt portion 521 and the rear belt portion 522, and FIG. 18B is a schematic cross-sectional view of the front belt portion 521 and the rear belt portion 522. 5 is a schematic plan view of a front belt portion 521. FIG. 4 is a schematic plan view of a rear belt portion 522. FIG. It is a table | surface which shows the test result about the visibility of the high pressure area | region 560. FIG. It is explanatory drawing of the junction part 530 formed in the elastic film 565. FIG.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
It has an up-down direction, a left-right direction, and a front-rear direction intersecting each other, and has a front belt part, a rear belt part, and an absorbent main body having an absorbent core, and the front belt part and the rear belt part A pants-type disposable diaper having a waistline opening formed at the upper end thereof, wherein the front belt portion and the rear belt portion are the skin-side nonwoven fabric located on the most skin side and the non-skin side located on the most non-skin side It has a nonwoven fabric and an elastic member that expands and contracts in the left-right direction, and is adjacent to the expansion / contraction region along the edge of the waistline opening and the expansion / contraction region at the center in the left-right direction of the front belt portion from below. And a high pressure region provided below the expansion / contraction region, and the force for extending the high pressure region of unit width in the left-right direction by a unit length is The base region in the left-right direction It is larger than the force for extending the unit length, and the high pressure region is provided circumferentially across the front belt portion and the rear belt portion, and the skin side nonwoven fabric and the non-skin side nonwoven fabric. A stretchable film and a breathable portion that is more breathable than the portion where the stretchable film is located, and at least one of the front belt portion and the rear belt portion absorbs the absorption A pants-type disposable diaper characterized by not overlapping with the sex core in the front-rear direction.

According to such a pants-type disposable diaper, the adhesion between the front belt portion and the rear belt portion can be partially enhanced, and displacement during wearing can be suppressed. Moreover, since a high pressure area | region has a stretchable film and a ventilation part, the trace remaining of a stretchable member and the fall of air permeability can be suppressed. Moreover, since an elastic film is located between a skin side nonwoven fabric and a non-skin side nonwoven fabric, breakage of an elastic film can be suppressed and air permeability of a plane direction is ensured between a wearer's skin.

Such a pant-type disposable diaper, wherein the stretchable member is a sheet-like member having air permeability.

According to such a pants-type disposable diaper, since the front belt portion and the rear belt portion are in close contact with the wearer on the surface, the trace of the stretchable member can be suppressed, and air permeability is ensured.

Such a pants-type disposable diaper, wherein the stretchable member is a stretchable nonwoven fabric, the stretchable nonwoven fabric is between the skin side nonwoven fabric and the non-skin side nonwoven fabric, and is on the skin side of the stretchable film. It is the underpants type disposable diaper characterized by being arranged in.

According to such a pants-type disposable diaper, a space (air passage) is easily formed between the wearer's skin and air permeability in the planar direction is ensured.

In such a pants-type disposable diaper, the stretchable member is a stretchable nonwoven fabric, and in the stretchable region, a plurality of thread-like elastic materials that stretch in the left-right direction are arranged at intervals in the up-down direction. The vertical length from the upper end of the high pressure region to the upper end of the front belt portion at the center in the left-right direction of the front belt portion is longer than the vertical length of the high pressure region. A pants-type disposable diaper characterized by the above.

According to such a pants-type disposable diaper, it is difficult for the high pressure region to contact around the umbilicus of the wearer who easily sweats, and the stuffiness inside the diaper can be reduced.

In such a pants-type disposable diaper, in the high pressure region, a plurality of the stretchable films long in the left-right direction are arranged at intervals in the up-down direction, and the stretchable films arranged in the up-down direction A pants-type disposable diaper is characterized in that a portion in between is the vent.

Such a pants-type disposable diaper can suppress a decrease in air permeability in a high pressure region.

In such a pants-type disposable diaper, in the high pressure region, the area of the portion where the stretchable film is located is larger than the area of the ventilation portion between the stretchable films arranged in the vertical direction. A pants-type disposable diaper characterized by

According to such a pants-type disposable diaper, it is possible to improve the adhesion in the high pressure region while suppressing a decrease in the air permeability in the high pressure region, and to suppress the displacement during wearing.

In such a pants-type disposable diaper, in the left and right side portions of the front belt portion and the rear belt portion, the area of the ventilation portion is smaller than that of the central portion in the left and right direction. A pants-type disposable diaper characterized by having a large value divided by.

According to such a pants-type disposable diaper, the ratio of the ventilation part in the high pressure region is high in the left and right side portions where the wearer's movement (movement of the buttocks and legs) is large. Therefore, the air permeability in the high pressure region can be improved while preventing the wearer's movement from being hindered. On the other hand, the position shift at the time of wear can be controlled efficiently by making the wearer's movement small the right-and-left central part tightly contact the wearer.

Such a pants-type disposable diaper is a pants-type disposable diaper characterized in that the stretchable film does not have an opening penetrating the stretchable film.

Such a pants-type disposable diaper can suppress a decrease in the strength of the stretchable film due to opening. Moreover, the shrinkage force of an elastic film can be utilized effectively.

Such a pants-type disposable diaper is a pants-type disposable diaper characterized in that the stretchable film has an opening penetrating the stretchable film, and the opening is the ventilation portion.

In such a pants-type disposable diaper, the skin-side nonwoven fabric, the non-skin-side nonwoven fabric, the stretchable member, and the stretchable film are welded in the front-rear direction by the same welding pattern. It is a pants-type disposable diaper.

According to such a pants-type disposable diaper, the moist air inside the diaper can be efficiently discharged in the front-rear direction (thickness direction) in the front belt portion and the rear belt portion, and the air permeability is improved.

In such a pants-type disposable diaper, the welding pattern is a pattern in which a plurality of welding portions are scattered, and in the state where the pants-type disposable diaper is stretched, the area of the ventilation portion is the higher pressure. A pants-type disposable diaper characterized by being larger than the area of the welded portion located in the region.

According to such a pants-type disposable diaper, it is possible to suppress a decrease in air permeability in the high pressure region due to the welded portion.

There are a vertical direction, a horizontal direction, and a front-rear direction that intersect each other, and both the left and right side portions of the front belt portion and the left and right side portions of the rear belt portion are locked by a pair of locking portions. The rear belt portion has a low pressure region and a high pressure region, and the low pressure region and the high pressure region are stretchable in the left-right direction. The force for extending the high pressure region of the unit width in the up-down direction by a unit length in the left-right direction causes the low pressure region of the unit width to extend by the unit length in the left-right direction. The high pressure region is continuously arranged in the left-right direction across the pair of locking portions, and both ends in the left-right direction of the high pressure region are in the middle. The vertical direction of the high pressure region compared to the part The lower pressure region is disposed adjacent to the lower portion of the high pressure region at the center of the rear belt portion in the left-right direction. A pants-type disposable diaper characterized by

According to such a pants-type disposable diaper, since the high pressure region is connected to the front belt portion, it is possible to suppress the tightening pressure in the high pressure region from being reduced. Moreover, it becomes the arrangement | positioning match | combined with the wearer's middle gluteal muscle, a high pressure area | region can tighten a middle gluteal muscle by a high pressure area | region, and can support a wearer's operation | movement (walking). On the other hand, the low pressure region is arranged in accordance with the wearer's greater gluteal muscle, so that excessive tightening of the greater gluteal muscle can be suppressed, and the wearing comfort of the diaper can be improved.

In such a pants-type disposable diaper, the pants-type disposable diaper is characterized in that a lower end of the high pressure region is inclined downward from a center portion in the left-right direction of the high pressure region toward both ends. is there.

According to such a pants-type disposable diaper, the high pressure region has a shape close to the wearer's middle gluteal muscle and can further support the wearer's movement (walking).

Such a pants-type disposable diaper has an absorbent core, and the high pressure region is arranged in the front-rear direction without overlapping with a rear side portion of the absorbent core, and the low pressure region is The pants-type disposable diaper is disposed at least between the lower end of the high pressure region and the upper end of the rear side portion of the absorbent core.

According to such a pants-type disposable diaper, the absorbent core can be prevented from shrinking due to the high pressure region, and the comfort of the diaper can be improved.

In such a pants-type disposable diaper, the front belt portion has a front elastic member that expands and contracts in the left-right direction, and the front elastic member extends in the left-right direction across the pair of locking portions. The pants-type disposable diaper is arranged continuously, and the high pressure region is connected to the front elastic member at the locking portion.

According to such a pants-type disposable diaper, the high pressure region and the front elastic member have a circumferential shape and fit around the wearer's torso, so that the displacement of the diaper can be suppressed. Further, the tightening pressure in the high pressure region is increased, and the operation (walking) of the wearer can be further supported.

Such a pants-type disposable diaper, wherein the front belt portion has a front low pressure region having elasticity in the left-right direction, and a front high pressure region having the front elastic member, and is a unit in the vertical direction. The force for extending the front high pressure region of width in the left-right direction by a unit length is larger than the force for extending the front low pressure region of unit width in the left-right direction by the unit length. The high pressure region is a pants-type disposable diaper characterized in that it is connected to the front high pressure region at the locking portion.

In such a pants-type disposable diaper, the front high pressure region has a plurality of the front elastic members spaced apart in the vertical direction, and the high pressure region has a rear elastic property that expands and contracts in the left-right direction. A plurality of members spaced apart in the vertical direction, and the uppermost front stretchable member and the uppermost rear stretchable member are connected to each other in the locking portion; A pants-type disposable diaper, wherein the front elastic member on the side and the rear elastic member on the lowermost side are connected.

In such a pants-type disposable diaper, both the left and right end portions of the front high pressure region are longer in the vertical direction of the front high pressure region than the center portion, and the front high pressure region A pants-type disposable diaper characterized in that the upper end of the pressure region is located above.

According to such a pants-type disposable diaper, the middle ribs of the wearer's side can be tightened by the front high pressure region, and the wearer's movement (walking) can be further supported. Moreover, it can suppress that a front side high pressure area | region tightens a wearer's abdomen, and can improve the wearing comfort of a diaper.

Such a pant-type disposable diaper, wherein the front low-pressure region is disposed adjacent to the front high-pressure region at the center in the left-right direction of the front belt portion. It is a disposable diaper.

According to such a pants-type disposable diaper, the front low pressure region fits the wearer's abdomen moderately, and the displacement of the diaper can be suppressed.

Such a pant-type disposable diaper having an absorbent core, wherein the front high pressure region is arranged in the front-rear direction so as not to overlap the front side part of the absorbent core. Type disposable diaper.

According to such a pants-type disposable diaper, the absorbent core can be prevented from shrinking due to the front high pressure region, and the comfort of wearing the diaper can be improved.

In such a pants-type disposable diaper, the high pressure region has a plurality of rear elastic members that expand and contract in the left-right direction, spaced apart in the vertical direction, and both ends of the high pressure region in the left-right direction. The pants-type disposable diaper is characterized in that the distance between the rear elastic members adjacent to each other in the vertical direction is wider in the part than in the central part.

According to such a pants-type disposable diaper, the length in the vertical direction of the high pressure region is longer at the left and right ends of the high pressure region than at the center. Therefore, the high pressure region is arranged in accordance with the wearer's middle muscle, and can support the wearer's movement (walking).

Such a pant-type disposable diaper, wherein the high pressure region has a rear elastic member that expands and contracts in the left-right direction, and the rear elastic member is a sheet-like member. Type disposable diaper.

According to such a pants-type disposable diaper, the high pressure region fits over a wide range of the wearer's middle gluteal muscle, so that the wearer's movement (walking) can be further supported. Moreover, since a high pressure area | region fits a wearer on a surface, local clamping | tightening can be prevented and the wearing comfort of a diaper can be improved.

In such a pants-type disposable diaper, in the high pressure region, a stretchable nonwoven fabric and a stretchable film are disposed between the skin side sheet and the non-skin side sheet, and in the low pressure region, the skin side sheet The pants-type disposable diaper is characterized in that the stretchable nonwoven fabric is disposed between the non-skin side sheet.

According to such a pants-type disposable diaper, since the high pressure region and the low pressure region fit the wearer on the surface, local tightening can be prevented and the comfort of the diaper can be improved.

Such a pants-type disposable diaper is a pants-type disposable diaper characterized in that a stretchable member is disposed along a pair of leg openings.

According to such a pants-type disposable diaper, it is possible to prevent the stretchable member of the leg opening from coming into close contact with the wearer's leg and the diaper being pulled up too much. Therefore, the diaper is correctly worn so that the high pressure region is located at the wearer's middle gluteal muscle.

A pants-type disposable diaper having an up-down direction, a left-right direction, and a front-rear direction intersecting each other, and having a belt portion and an absorbent main body, the belt portion being below a stretchable region along an edge of a waistline opening The low pressure region and the high pressure region, the low pressure region and the high pressure region are adjacent and stretchable in the left-right direction, and have a unit width in the up-down direction. The force for extending the high pressure region in the left-right direction by a unit length is larger than the force for extending the low pressure region of the unit width in the left-right direction by the unit length. Is a pants-type disposable diaper characterized in that when viewed from at least one of the non-skin side and the skin side, at least a part of the high pressure region has a color different from that of the low pressure region.

According to such a pants-type disposable diaper, the user can grasp the position of the high pressure region and can align the high pressure region with the place where the wearer should tighten. Therefore, since the diaper is worn at an appropriate position of the wearer, the effect of the high pressure region can be obtained. Moreover, it can suppress that a high pressure area | region is located in the place which should not be tightened by a wearer, and the wearing comfort of a diaper will fall.

In such a pants-type disposable diaper, when the belt portion is viewed from at least one of the non-skin side and the skin side, a contour portion of the high pressure region in the vertical direction is different from the low pressure region. A pants-type disposable diaper characterized by its color.

According to such a pants-type disposable diaper, the boundary between the high pressure region and the low pressure region becomes clear, and the user can more easily grasp the position of the high pressure region.

In such a pants-type disposable diaper, when the belt portion is viewed from at least one of the non-skin side and the skin side, the L * a * b * color specification in the high pressure region and the low pressure region When the difference in system a * value is Δa * and the difference in b * value is Δb *, and the color difference ΔE * is calculated by the following equation, ΔE * = [(Δa *) 2+ (Δb *) 2] 1/2 A pants-type disposable diaper characterized by having a color difference ΔE * of 1.45 or more.

According to such a pants-type disposable diaper, the user can distinguish between a high pressure region and a low pressure region.

In such a pants-type disposable diaper, when the belt portion is viewed from the non-skin side,
The pants-type disposable diaper is characterized in that the color difference ΔE * is 1.45 or more.

According to such a pants-type disposable diaper, since the high pressure region can be visually recognized from the non-skin side (outside), the high pressure region is easily recognized by the user, and the high pressure region is located at the place where the wearer should tighten. It becomes easy to align.

In such a pants-type disposable diaper, the high pressure region has an elastic member that expands and contracts in the left-right direction, and the elastic member is colored in a color different from that of the low pressure region. It is a pants-type disposable diaper.

According to such a pants-type disposable diaper, since the high pressure region recognized by the user matches the region where the tightening pressure is strong, the effect of the high pressure region can be easily obtained.

In such a pants-type disposable diaper, in the high pressure region, a plurality of materials are laminated in the thickness direction of the belt portion, and the stretchable member is disposed closer to the non-skin side. It is a pants-type disposable diaper characterized.

According to such a pants-type disposable diaper, since the high pressure region is easily visible from the non-skin side (outside), the high pressure region is easily recognized by the user, and the high pressure region is located at the place where the wearer should tighten. It becomes easy to align.

Such a pants-type disposable diaper, wherein the stretchable member is a sheet-like stretchable member.

According to such a pants-type disposable diaper, since the colored elastic member is planar, the area of a portion having a different color from the low pressure region is increased in the high pressure region, and the high pressure region is easily visible. Become.

Such a pants-type disposable diaper is a pants-type disposable diaper characterized in that in the high pressure region, a plurality of the stretchable members are arranged at intervals in the vertical direction.

According to such a pants-type disposable diaper, the high pressure region becomes a striped pattern, the striped pattern becomes an accent, and the high pressure region is easily recognized by the user.

In such a pants-type disposable diaper, the stretchable member is intermittently joined by a plurality of joints with a sheet disposed on the non-skin side with respect to the stretchable member, and in the vertical direction The interval between the joining portions adjacent in the up-down direction is smaller than the length of the stretchable member, and the joining portion adjacent in the left-right direction is shorter than the length of the stretchable member in the left-right direction. A pants-type disposable diaper characterized by having a smaller interval.

According to such a pants-type disposable diaper, since a fine ridge (unevenness) is formed on the stretchable member, the impression of a soft diaper can be given to the user while making the stretchable member visible.

In such a pants-type disposable diaper, the high pressure region has a different color portion that is a different color from the low pressure region, and a non-different color portion other than the different color portion, and a center of the belt portion in the left-right direction. The pants-type disposable diaper is characterized in that the ratio of the different color part per unit area is higher in the part than in the end part.

According to such a pants-type disposable diaper, since the high pressure region is conspicuous in the central portion in the left-right direction of the belt portion that is easily noticed by the user, the high pressure region is easily recognized by the user.

In such a pants-type disposable diaper, the belt part includes a front belt part and a rear belt part, and the upper part of the high pressure region located at the center in the left-right direction of the front belt part The length in the up-down direction to the waistline opening is different from the length in the up-down direction from the upper end of the high pressure region located at the center in the left-right direction of the rear belt portion to the waistline opening. It is a pants-type disposable diaper.

According to such a pants-type disposable diaper, it is possible to determine the diaper before and after based on a high pressure region that can be visually recognized.

Such a pants-type disposable diaper, wherein the belt portion includes a front belt portion and a rear belt portion, both side portions in the left-right direction of the front belt portion, and the left-right direction of the rear belt portion. The high pressure region has a first high pressure region in the front belt portion, and the first high pressure region has the pair of engagement portions. It is continuously arranged in the left-right direction across the locking portions, and the center portion in the left-right direction of the first high pressure region is located below the both end portions. It is a pants-type disposable diaper.

Such a pants-type disposable diaper can prevent the wearer's abdomen from being excessively tightened by the first high pressure region. Moreover, a wearer's upper anterior iliac spine vicinity can be clamp | tightened in the both ends of the left-right direction of a 1st high pressure area | region, and the position shift of the diaper at the time of wear can be suppressed.

In such a pants-type disposable diaper, the high pressure region has a second high pressure region in the front belt portion, and the second high pressure region extends between the pair of locking portions. The both ends in the left-right direction of the second high pressure region are located below the first high pressure region, and are arranged in the left-right direction of the second high pressure region. At least a part of the central portion is a pants-type disposable diaper characterized by overlapping with the first high pressure region.

Such a pants-type disposable diaper can prevent the wearer's abdomen from being excessively tightened by the second high pressure region. Moreover, it can clamp | tighten so that a wearer's upper anterior iliac spine may be supported from the downward direction in the both ends of the left-right direction of a 2nd high pressure area | region, and the position shift of the diaper at the time of wear can be suppressed.

Such a pants-type disposable diaper, wherein the belt portion includes a front belt portion and a rear belt portion, both side portions in the left-right direction of the front belt portion, and the left-right direction of the rear belt portion. The high pressure region has a third high pressure region in the rear belt portion, and the third high pressure region has the pair of engagement portions. The left and right central portions of the third high pressure region are located on the upper side of the both end portions. It is a pants-type disposable diaper.

According to such a pants-type disposable diaper, it is possible to prevent the wearer's buttocks center from being excessively tightened by the third high pressure region.

In such a pants-type disposable diaper, the high pressure region has a fourth high pressure region in the rear belt portion, and the fourth high pressure region extends between the pair of locking portions. The left and right end portions of the fourth high pressure region are positioned above the third high pressure region, and are arranged in the left and right direction of the fourth high pressure region. At least a part of the central portion is a pants-type disposable diaper characterized by overlapping with the third high pressure region.

According to such a pants-type disposable diaper, it is possible to prevent excessive tightening of the wearer's buttocks center by the fourth high pressure region. Moreover, a wearer's upper anterior iliac spine vicinity can be clamped in the both ends of the left-right direction of a 4th high pressure area | region, and the position shift of the diaper at the time of wear can be suppressed.

=== First Embodiment ===
<< Basic configuration of diaper 1 >>
FIG. 1 is a schematic perspective view of a pants-type disposable diaper 1 (hereinafter also referred to as diaper 1). FIG. 2 is a schematic plan view of the diaper 1 in the unfolded and extended state. The extended state of the diaper 1 is a state in which the diaper 1 is extended without any wrinkles, and the dimensions of each member constituting the diaper 1 (for example, a sheet constituting the outer package 20) are the same as the dimensions of the single member. Or it is the state extended until it became the length near it. FIG. 3 is a schematic cross-sectional view taken along the line II (the center in the left-right direction) of FIG.

The diaper 1 has an up-down direction, a left-right direction, and a front-rear direction that intersect with each other, and also has a thickness direction in which the members are stacked as shown in FIG. In the up and down direction, the side that becomes the wearer's trunk side is the upper side, and the side that becomes the wearer's crotch is the lower side. In the front-rear direction, the side that becomes the wearer's stomach side is the front side, and the side that becomes the wearer's back side is the rear side. In the thickness direction, the side in contact with the wearer is the skin side, and the opposite side is the non-skin side.

The diaper 1 has an absorbent main body 10 and an exterior body 20 located on the non-skin side of the absorbent main body 10. The exterior body 20 includes a ventral-side exterior body 21 (corresponding to the front belt portion) positioned on the front side in the front-rear direction, a back-side exterior body 22 (corresponding to the rear belt portion) positioned on the rear side in the front-rear direction, and And a crotch outer body 23 connecting the two.

In addition, in the diaper 1 of this embodiment, the exterior body 20 is composed of three members (the abdominal exterior body 21, the back exterior body 22, and the crotch exterior body 23), but is not limited thereto. For example, the abdominal-side exterior body 21, the back-side exterior body 22, and the crotch exterior body 23 may be configured by one member. Moreover, it is good also as a structure which does not have the crotch exterior body 23. FIG.

In the unfolded diaper 1 shown in FIG. 2, the abdominal exterior body 21 is located on one end side in the longitudinal direction of the absorbent main body 10, and the back exterior body 22 is disposed on the other end side in the longitudinal direction of the absorbent main body 10. Is located. In the diaper 1 in the unfolded state, the absorbent main body 10 is folded in half at the center CL in the longitudinal direction, and both the left and right ends of the abdominal exterior body 21 and the left and right ends of the back side exterior body 22 are welded or the like. By joining, it becomes a pants type shown in FIG. That is, the longitudinal direction of the absorbent main body 10 is along the vertical direction of the diaper 1, the abdominal exterior body 21 and the back exterior body 22 are connected in a ring shape, the waistline opening 1 a is formed at the upper end thereof, A pair of leg openings 1b are formed on both sides. Hereinafter, the regions at both ends in the left-right direction where the ventral-side exterior body 21 and the back-side exterior body 22 are joined are referred to as end joint regions 24.

As shown in FIG. 3, the absorbent main body 10 includes an absorbent core 11, a liquid-permeable top sheet 12 positioned on the skin side of the absorbent core 11, and a back positioned on the non-skin side of the absorbent core 11. And a sheet 13. The back sheet 13 of the present embodiment has a two-layer structure of a liquid impermeable sheet 13a and a liquid permeable sheet 13b arranged on the non-skin side.

The absorbent core 11 is a member that absorbs and holds excretory fluid such as urine, and is formed of liquid absorbent fibers such as pulp fibers mixed with a super absorbent polymer (SAP), for example. Although not shown, the outer peripheral surface of the absorbent core 11 may be covered with a liquid-permeable sheet such as tissue paper or nonwoven fabric.

As shown in FIG. 2, the abdominal side exterior body 21 and the back side exterior body 22 are respectively lower than the

waistline regions

211 and 221 in which the end joint regions 24 are positioned in the vertical direction and the

waistline regions

211 and 221.

Crotch side regions

212 and 222.

The

crotch side regions

212 and 222 have a substantially trapezoidal shape, and the lateral width (length in the left-right direction) becomes narrower toward the lower side. Compared with the ventral side exterior body 21, the back side exterior body 22 has a larger crotch region 222 and can cover the wearer's buttocks.

As shown in FIG. 3, the ventral-side exterior body 21 and the back-side exterior body 22 are positioned between the skin-

side sheets

213 and 223, the non-skin-

side sheets

214 and 224, and at least the diaper 1. Elastic nonwoven fabrics 215 and 225 (corresponding to elastic members) having elasticity in the left-right direction.

The

skin side sheets

213 and 223, the

non-skin side sheets

214 and 224, and the stretchable

nonwoven fabrics

215 and 225 are joined together by a plurality of welded portions (for example, 40 in FIG. 6B described later). For this reason, compared with the case where it joins with the adhesive agent which solidifies, for example, the touch is soft. In addition, the elastic

nonwoven fabrics

215 and 225 contract between the welded portions, so that the

skin side sheets

213 and 223 and the

non-skin side sheets

214 and 224 are curved and protrude outward in the thickness direction. That is, since the

skin side sheets

213 and 223 and the

non-skin side sheets

214 and 224 swell between the welded portions, the touch becomes softer and a visually soft impression can be given to the user. Since the welded portions are scattered at a relatively narrow interval, the diaper 1 of the present embodiment extends in many directions, and a fine bulge is generated. Since the occurrence of vertical warp etc. can be prevented, the beauty of the diaper 1 is good.

The stretchable

nonwoven fabrics

215 and 225 include, for example, a polyurethane elastomer that is a thermoplastic elastomeric fiber having elasticity and a polypropylene (PP) of a polyolefin resin that is a thermoplastic resin fiber having inelasticity. The nonwoven fabric is subjected to an appropriate stretching process such as gear stretching. By this stretching treatment, the stretchable

nonwoven fabrics

215 and 225 have the stretchability in the left-right direction and the up-down direction of the diaper 1. In addition, the extending | stretching process may perform a extending | stretching process in the direction orthogonal to each other, and may perform an extending | stretching process only in a predetermined direction. When the stretching process is performed only in the predetermined direction, the elasticity in the predetermined direction is manifested, but not all fiber orientations are along the predetermined direction, so the elasticity is also in the direction perpendicular to the predetermined direction. Is expressed.

Further, a plurality of waistline elastic members 26 (for example, rubber thread) are arranged in a region along the edge of the waistline opening 1a. Also in a region along the edge of the leg opening 1b, a plurality of leg elastic members 27 (for example, rubber thread) are arranged. Thereby, the waist circumference and leg circumference of diaper 1 stick to a wearer firmly.

The crotch outer body 23 has the same configuration as the abdominal side outer body 21 and the back side outer body 22, and the skin side sheet 231, the non-skin side sheet 232 positioned on the non-skin side, and the expansion and contraction positioned therebetween. A non-woven fabric 233.

<< About the high pressure region 30s >>
4A to 4C are conceptual diagrams showing a state where the diaper 1 is worn. 4A is a view seen from the front side, FIG. 4B is a view seen from the rear side, and FIG. 4C is a view seen from the side. In the drawing, the first high pressure region 31 s and the second high pressure region 32 s are indicated by alternate long and short dash lines.
5A to 5B are schematic cross-sectional views of the ventral exterior body 21 and the back exterior body 22. FIG. 5A is a cross-sectional view of the present embodiment, and FIG. 5B is a cross-sectional view of a modified example.
6A is an explanatory diagram of the high pressure region 30s, and FIG. 6B is an explanatory diagram of the ventilation portion 34 and the welding portion 40. FIG.

The

waist areas

211 and 221 of the ventral exterior body 21 and the back exterior body 22 have stretchable areas 26s along the edge of the waistline opening 1a. The expansion / contraction region 26s is a region provided with a thread-like waistline elastic member 26 that expands and contracts in the left-right direction. The

waistline regions

211 and 221 include a high pressure region 30 s and a low pressure region 33 s that is other than the expansion region 26 s.

The low pressure region 33 s is a region where stretchable

nonwoven fabrics

215 and 225 are provided between the

skin side sheets

213 and 223 and the

non-skin side sheets

214 and 224. As shown in FIG. 2, the low pressure region 33 s has a base region 21 s that is adjacent to the stretchable region 26 s in the center in the left-right direction of the ventral-side exterior body 21 from below.

The high pressure region 30 s is a region where the stretchable

nonwoven fabrics

215 and 225 and the stretchable film 30 are provided between the

skin side sheets

213 and 223 and the

non-skin side sheets

214 and 224. The backside exterior body 22 is provided in a circumferential shape. The stretchable film 30 is an elastic member having a stretchability by melting an elastomer resin such as urethane or styrene to form a sheet having a uniform thickness. For example, it is a stretchable film in which a polyolefin layer is integrated on the front and back surfaces of an elastomer layer. When this stretchable film is used, since the polyolefin layer does not have stretchability, stretchability can be expressed by previously stretching the film. The presence of the polyolefin layer on the surface has an advantage that it is easy to weld with the polyolefin fiber nonwoven fabric.

The high pressure region 30s is a region where pressure (tightening pressure) when the diaper 1 is worn is higher than that of the low pressure region 33s. In other words, the force for extending the high pressure region 30s having the unit width (per unit length in the vertical direction) in the left and right direction is the low pressure region 33s (base region) having the unit width (per unit length in the vertical direction). 21s) is greater than the force that extends the unit length in the left-right direction.

That is, the contraction force acting in the left-right direction per unit length in the vertical direction in the high pressure region 30 s is larger than the contraction force acting in the left-right direction per unit length in the vertical direction in the low pressure region 33 s. The high pressure region 30 s having a larger contraction force closely adheres to the wearer.

In addition, the magnitude | size of the force which expands unit length of the high pressure area | region 30s of unit width and the base area | region 21s (low pressure area | region 33s) to the left-right direction can be measured and compared by a well-known method. For example, a sample having a predetermined size is cut out from each of the high pressure region 30s and the base region 21s. And the both ends of the sample corresponding to the left-right direction of the diaper 1 are pinched | interposed into the chuck | zipper of a tensile tester. Then, the load (N) obtained in a state where the sample is extended by separating the chucks by a unit length can be adopted as a force for extending the unit length in the left-right direction.

As described above, in the diaper 1 of the present embodiment, the high-pressure region 30 s is provided continuously in a part of the ventral-side exterior body 21 and the back-side exterior body 22 and in the circumferential direction. The adhesion of the exterior body 22 is partially enhanced. Therefore, compared with the case where the adhesiveness of the whole of the abdominal side exterior body 21 and the back side exterior body 22 is improved, the position shift of the diaper 1 at the time of wear can be suppressed, without giving a wearer an excessive feeling of pressure. Further, even in the low pressure region 33 s other than the high pressure region 30 s, the wearer's body can be held with an appropriate adhesion by the stretchable

nonwoven fabrics

215 and 225.

In the high pressure region 30 s, the sheet-like stretchable film 30 is provided on the stretchable

nonwoven fabrics

215 and 225. Therefore, the high pressure region 30s can be in close contact with the wearer by the surface, and the pressure by the high pressure region 30s is applied evenly to the wearer's skin. Therefore, local tightening as in the case where a thread-like elastic member is provided instead of the elastic film 30 can be prevented, and the trace of the elastic member can be suppressed.

Further, the stretchable film 30 can obtain a high contraction force (clamping pressure) even if the thickness is smaller than that of the stretchable nonwoven fabric. Therefore, in the high pressure region 30s, the stretchable film 30 is provided so as to overlap the stretchable

nonwoven fabrics

215 and 225. However, the thickness of the high pressure region 30s can be reduced, and a decrease in touch and heat dissipation can be suppressed.

Further, the high pressure region 30 s does not overlap the absorbent core 11 in the front-rear direction (thickness direction) in at least one of the ventral-side exterior body 21 and the back-side exterior body 22. In the diaper 1 of the present embodiment, as shown in FIG. 2, the abdominal and dorsal high pressure regions 30 s do not overlap the absorbent core 11. Therefore, it can suppress that the fastening pressure of high pressure area | region 30s will be inhibited by the absorbent core 11 with thickness and high rigidity.

Further, in the ventral exterior body 21 and the back exterior body 22, the skin-

side sheets

213 and 223 located on the most skin side and the non-skin-

side sheets

214 and 224 located on the most non-skin side are, for example, spunbond nonwoven fabrics. And non-woven fabric such as SMS non-woven fabric. In addition, elastic members that expand and contract the

waist regions

211 and 221 in the left-right direction are referred to as elastic

nonwoven fabrics

215 and 225. Since these nonwoven fabrics have voids between the constituent fibers, they have air permeability in the thickness direction.

On the other hand, the stretchable film 30 disposed in the high pressure region 30s has poor air permeability as compared with the nonwoven fabric. For this reason, simply providing the stretchable film 30 in the high pressure region 30s reduces the air permeability of the high pressure region 30s. If it does so, the inside of the diaper 1 will be steamed, and it will be uncomfortable, and rough skin, such as a rash, will arise.

Therefore, the high pressure region 30 s has a ventilation portion 34 that is more breathable than the portion where the stretchable film 30 is located. In the high pressure region 30 s of the present embodiment, a plurality of stretchable films 30 that are long in the left-right direction are arranged at intervals in the up-down direction, and portions between the stretchable films 30 aligned in the up-down direction (that is, the stretchable film) The portion where 30 is not located) is the ventilation portion 34.

Specifically, the high pressure region 30s includes a first high pressure region 31s and a second high pressure region 32s. In each of the first high pressure region 31s and the second high pressure region 32s, three stretchable films 30 are arranged at intervals in the vertical direction. The three stretchable films 30 on the ventral side exterior body 21 side and the three stretchable films 30 on the back side exterior body 22 side corresponding thereto have the same vertical position in the end joint region 24. It is arranged to be. That is, in the end joint region 24, the three stretchable films 30 on the ventral side exterior body 21 side and the three stretchable films 30 on the back side exterior body 22 side are connected so as to be continuous, and the high pressure region. 30 s is provided in a circumferential shape across the ventral-side exterior body 21 and the back-side exterior body 22.

Since the high pressure region 30 s has the ventilation portion 34 (air permeability in the thickness direction) as described above, moist air inside the diaper 1 is released from the high pressure region 30 s, and the stuffiness inside the diaper 1 can be reduced. . Therefore, the wearing comfort of the diaper 1 is improved, and the occurrence of sweats and the like can be suppressed.

In the end joint region 24, the high pressure region 30s on the ventral side and the high pressure region 30s on the back side are not limited to being completely continuous, and at least a portion may be continuous in the circumferential direction around the waist. For example, the high pressure region 30s on the back side may be disposed above the high pressure region 30s on the ventral side, and a step may be provided in the end joint region 24 to be partially connected.

Further, the stretchable film 30 is located between the

skin side sheets

213 and 223 and the

non-skin side sheets

214 and 224. Since the stretchable film 30 is not exposed to the non-skin side, breakage or peeling of the stretchable film 30 due to movement during wearing or rubbing with clothes can be suppressed. Moreover, if the stretchable film 30 is exposed to the skin side, the stretchable film 30 tends to adhere along the wearer's skin, and the air permeability in the planar direction of the high pressure region 30s decreases. On the other hand, the nonwoven fabrics such as the skin-

side sheets

213 and 223 are curved and protrude outward in the thickness direction due to the shrinkage of the stretchable film 30, as shown in FIG. 5A. Therefore, by arranging the skin side sheets 213 and 223 (nonwoven fabric) on the skin side of the stretchable film 30, a space S (air passage) is formed between the

skin side sheets

213 and 223 and the skin of the wearer. The Therefore, the air permeability in the planar direction of the abdominal exterior body 21 and the back exterior body 22 is ensured, and the stuffiness inside the diaper 1 can be further reduced.

In addition, regions other than the high pressure region 30s also have air permeability in the thickness direction. More specifically, the stretchable region 26s is a region in which the waistline elastic member 26 is provided with an interval in the vertical direction between the skin-

side sheets

213 and 223 and the non-skin-

side sheets

214 and 224 having air permeability. is there. Therefore, the stretchable region 26S has air permeability.

The low pressure region 33s (base region 21s) is a region in which stretchable

nonwoven fabrics

215 and 225 having air permeability are provided between the

skin side sheets

213 and 223 having air permeability and the

non-skin side sheets

214 and 224. It is. Therefore, the low pressure region 33s also has air permeability.

As described above, the

waist regions

211 and 221 of the abdominal exterior body 21 and the back exterior body 22 have air permeability over the entire area. Therefore, the stuffiness inside the diaper 1 can be further reduced.

Further, as shown in FIG. 6A, in the center C in the left-right direction of the ventral-side exterior body 21, the vertical length L1 from the upper end 30a of the high-pressure region 30s to the upper end 21a of the ventral-side exterior body 21 is high pressure. It is preferable that the vertical length L2 of the region 30s is longer (L1> L2).

By doing so, the high pressure region 30 s is positioned relatively downward at the center C in the left-right direction of the ventral-side exterior body 21. Therefore, it is difficult for the high pressure region 30s to come into contact with the wearer's umbilicus that easily sweats, and the stuffiness inside the diaper 1 can be further reduced. Further, since the high pressure region 30s does not come into contact with the wearer's umbilicus, the wearer can easily breathe.

Further, the stretchable member disposed in the high pressure region 30s and the low pressure region 33s is preferably a sheet-like member having air permeability. The sheet-like member having air permeability is an

elastic nonwoven fabric

215, 225 or an elastic film having an opening.

By doing so, the high pressure region 30s and the low pressure region 33s can be in close contact with the wearer while the air permeability of the high pressure region 30s and the low pressure region 33s is ensured. For this reason, local tightening can be prevented, and traces of the elastic member can be suppressed. In addition, the high pressure region 30s and the low pressure region 33s are in close contact with the wearer on the surface, so that the contact area with the skin, that is, the frictional resistance increases. Therefore, the position shift of the diaper 1 at the time of wear can be suppressed more.

However, it is not limited to the above, and the elastic member may be a plurality of thread-like elastic members provided at intervals in the vertical direction. Further, in this embodiment, as shown in FIG. 3, the stretchable

nonwoven fabrics

215 and 225 are not arranged in the stretchable region 26s, but even if a sheet-like member having air permeability is placed in the stretchable region 26s as well. Good.

As shown in FIG. 3, the stretchable

nonwoven fabrics

215 and 225 are between the

skin side sheets

213 and 223 and the

non-skin side sheets

214 and 224, and are disposed on the skin side of the stretchable film 30. Is preferred.

By doing so, as shown in FIG. 5A, due to the shrinkage of the stretchable film 30, the two nonwoven fabrics (the stretchable

nonwoven fabrics

215 and 225 and the skin side sheets 213 and 223) are curved and protrude toward the skin side. Therefore, the space S (air passage) is formed larger between the

skin side sheets

213 and 223 and the wearer's skin. Therefore, the air permeability in the planar direction of the ventral exterior body 21 and the back exterior body 22 is improved.

Further, the high pressure region 30 s of the present embodiment has a ventilation portion 34 between the stretchable films 30 arranged in the vertical direction. In this case, it is preferable that the stretchable film 30 does not have an opening penetrating the stretchable film 30.

By doing so, it is possible to suppress a decrease in the strength of the stretchable film 30 due to opening. In addition, the stretchable film 30 can be effectively used without the tightening pressure of the stretchable film 30 being reduced by opening. However, it is not limited to this, The elastic film 30 may have an opening.

Further, in the high pressure region 30s, the area of the portion where the stretchable film 30 is located is preferably larger than the area of the ventilation portion 34 between the stretchable films 30 arranged in the vertical direction. By doing so, it is possible to increase the tightening pressure of the high pressure region 30s while suppressing a decrease in the air permeability of the high pressure region 30s, and to suppress the displacement of the diaper 1 when worn.

In this embodiment, the lengths of the stretchable film 30 and the ventilation portion 34 in the vertical direction are approximately the same. Each of the first high pressure region 31 s and the second high pressure region 32 s includes three stretchable films 30 and two ventilation portions 34. Therefore, the area of the portion where the stretchable film 30 is located is larger than the area of the ventilation portion 34.

In addition, the comparison of an area can be performed by a well-known method in the natural state of the diaper 1 or the state where the diaper 1 is extended. For example, visual comparison may be performed, or the area of each part may be calculated and compared from an image obtained by photographing the high pressure region 30s using area calculation software.

Further, the four sheets of the

skin side sheets

213 and 223, the

non-skin side sheets

214 and 224, the stretchable

nonwoven fabrics

215 and 225, and the stretchable film 30 are arranged in the thickness direction (front-rear direction) by the same welding pattern. It is preferably welded and joined. That is, it is preferable that four sheets are welded simultaneously. Examples of the welding method include well-known methods such as thermal welding, ultrasonic welding, and welding by laser irradiation.

The welding pattern is a pattern in which a plurality of welding portions 40 are scattered. In the present embodiment, as shown in FIG. 6B and FIG. 7C to be described later, rectangular welded portions 40 inclined at 45 degrees or −45 degrees with respect to the left-right direction are arranged at intervals in the left-right direction and the up-down direction. ing. However, the welding pattern shown in FIG. 6B is an example, and the shape, size, number, arrangement, and the like of the welded portion 40 are not limited to those illustrated.

At the welded portion 40, the sheet becomes a film and the air permeability decreases. Therefore, when sheets adjacent to each other in the thickness direction are welded individually and the welded portions 40 of each layer are displaced in the plane direction, the moist air inside the diaper 1 is smoothly released as shown by the arrows in FIG. 5B. Can not. Therefore, by simultaneously welding the four sheets, the humid air inside the diaper 1 can be efficiently discharged in the thickness direction as shown by the arrow in FIG. 5A, and the ventral exterior body 21 and the back exterior body The air permeability in the thickness direction of 22 is improved.

Also, sheets adjacent in the thickness direction may be joined with an adhesive. However, even in the solidified adhesive, the air permeability decreases. The application pattern of the adhesive that joins adjacent sheets in the thickness direction is the same, and overlapping positions can efficiently release moist air inside the diaper 1, but the position of the adhesive application pattern is aligned. It ’s difficult. Therefore, as described above, it is preferable to weld and join the four sheets at the same time.

Moreover, in the state where the diaper 1 is extended, the area of the ventilation part 34 in the high pressure region 30s is preferably larger than the area of the welded part 40 located in the high pressure region 30s. Specifically, as shown in FIG. 6B, it is preferable that the area of the ventilation portions 34 between the stretchable films 30 arranged in the vertical direction is larger than the area of the welding portions 40 per piece. .

By doing so, it is possible to prevent the ventilation part 34 from being covered with the welding part 40 whose air permeability is lowered. Therefore, the air permeability of the high pressure region 30s can be maintained. In addition, the comparison of the area of each part can be performed by well-known methods, such as the method of visual observation, the method of using area calculation software, as mentioned above.

In addition, the first high pressure region 31s is separated from the second high pressure region 32s in the end joint region 24 and is disposed above the second high pressure region 32s. The first high pressure region 31s is arranged so that at least the upper end is above the upper anterior iliac spine of the wearer, and the second high pressure region 32s is at least lower than the upper anterior iliac spine. It is preferable that they are arranged on the side. In the present embodiment, the lower end of the first high pressure region 31 s is arranged to pass over the superior anterior iliac spine. The upper anterior iliac spine is a protruding portion of the iliac bone that is the largest bone of the pelvis, and is a ledge that touches a finger when a hand is placed on the waist. Thereby, at the time of wearing of the diaper 1, the wearer's upper anterior iliac spine can be sandwiched between the first high pressure region 31s and the second high pressure region 32s. Therefore, the position shift of the diaper 1 at the time of wear can be suppressed.

The first high pressure region 31s is curved so as to protrude downward on the ventral side, and is disposed substantially horizontally near the lower side of the expansion / contraction region 26s on the back side. On the other hand, the second high pressure region 32s is arranged substantially horizontally on the ventral side and is curved so as to protrude upward on the back side. Therefore, as shown in FIGS. 4A to 4C, at the center C in the left-right direction of the diaper 1, the lower end of the first high pressure region 31s on the back side is higher than the lower end of the first high pressure region 31s on the ventral side. Is arranged. Similarly, at the center C in the left-right direction of the diaper 1, the lower end of the second high pressure region 32s on the back side is disposed above the lower end of the second high pressure region 32s on the ventral side. Thereby, a lower abdominal part can be tightened diagonally upward and intra-abdominal pressure can be raised. Therefore, the function of muscles around the pelvis (such as abdominal muscles) can be assisted and the pelvis can be stabilized.

Further, as described above, the first high pressure region 31s and the second high pressure region 32s are separated in the vertical direction on the lateral side A2 (see FIG. 2) of the ventral side exterior body 21 and the back side exterior body 22. is doing. On the other hand, in the central portion A1 in the left-right direction of the ventral-side exterior body 21 and the back-side exterior body 22, a part of the first high pressure region 31s and the second high pressure region 32s overlap.

Therefore, in the side part A2 in the left-right direction of the ventral-side exterior body 21 and the back-side exterior body 22, the ratio of the ventilation part 43 in the high pressure region 30s is higher than that in the center part A1 in the left-right direction. In other words, the value obtained by dividing the area of the ventilation portion 43 by the area of the high pressure region 30s (the combined area of the first high pressure region 31s and the second high pressure region 32s) is large.

Thus, in the side part A2 in the left-right direction where the wearer's movement (movement of the buttocks and legs) is large, by increasing the ratio of the ventilation part 43, the breathability of the ventral-side exterior body 21 and the back-side exterior body 22 is increased. While improving, the tightening of the high pressure region 30s can be suppressed, and inhibition of the wearer's movement can be prevented. On the other hand, in the center portion A1 in the left-right direction where the movement of the wearer is small, the position of the diaper 1 at the time of wearing is reduced by reducing the ratio of the ventilation portion 43 and bringing the center portion A1 in the left-right direction into close contact with the wearer. The shift can be efficiently suppressed.

In addition, center part A1 of the left-right direction of the abdominal side exterior body 21 and the back side exterior body 22 is made into the center part when the abdominal side exterior body 21 and the back side exterior body 22 are divided into 3 in the left-right direction, The part is a side part A2 in the left-right direction. Further, as described above, the comparison of the areas of the respective portions can be performed by a known method such as a visual method or a method using area calculation software.

Further, the shape of the high pressure region 30s is not limited to the shape shown in FIG. For example, the number of high pressure regions 30s is not limited to two, and may be one or three or more. For example, the high pressure region 30s may be horizontal along the left-right direction on the ventral side and the back side.

<< Regarding Modification of High Pressure Region 30s >>
7A to 7C are explanatory views of a high pressure region 30s according to a modification. FIG. 7A shows the stretchable film 30 in a natural state, and FIG. 7B shows the stretchable film 30 in a state stretched in the left-right direction. FIG. 7C shows the size of the welded portion 40.

Although not shown, in the high pressure region 30s of the modified example, it is assumed that the stretchable film 30 is disposed over the entire region of the high pressure region 30s. That is, the high pressure region 30 s of the modified example does not have the ventilation portion 34 (see FIG. 6A) between the stretchable films 30 that are spaced apart in the vertical direction. Therefore, the tightening pressure in the high pressure region 30s becomes substantially uniform, and the tightening by the high pressure region 30s is stabilized.

The stretchable film 30 has an opening 50 that penetrates the stretchable film 30, and the opening 50 is used as a ventilation portion of the high pressure region 30s. By doing so, the moist air inside the diaper 1 can be discharged | emitted from the opening 50, and the fall of the air permeability of the thickness direction of the high pressure area | region 30s can be suppressed.

As a method for forming the opening 50, for example, as shown in FIG. 7A, a method of forming a plurality of slits extending in the vertical direction in the elastic film 30 in a natural state with an interval in the vertical direction and the horizontal direction is illustrated. it can. In this case, as shown in FIG. 7B, in a state where the stretchable film 30 is extended in the left-right direction, that is, in a worn state, the opening 50 expands in the left-right direction (for example, expands by about 2 to 4 times). Wet air can be released from. However, the pattern of the openings 50 shown in FIGS. 7A and 7B is an example, and the shape, size, number, arrangement, and the like of the openings 50 are not limited to those illustrated.

Further, similarly to the above-described embodiment, in the state in which the diaper 1 is extended, the area of the opening 50 (ventilation part) is preferably larger than the area of the welding part 40 located in the high pressure region 30s. . In the present embodiment, when the diaper 1 is extended, the length of the opening 50 in the left-right direction is about 2 to 4 mm, and the length in the up-down direction is about 1 mm. On the other hand, the welded portion 40 has a rectangular shape having a long side of about 0.5 mm and a short side of about 0.3 mm.

Thus, by making the area of the opening 50 per piece larger than the area of the welding portion 40 per piece, it is possible to prevent the opening 50 from being covered with the welding portion 40. Therefore, the air permeability of the high pressure region 30s can be maintained. In addition, the comparison of the area of each part can be performed by well-known methods, such as the method of visual observation, the method of using area calculation software, as mentioned above.

=== Second Embodiment ===
Hereinafter, as a pants-type disposable diaper, a pants-type disposable diaper for adults is taken as an example to describe a second embodiment. However, the present invention is not limited to this, and the pants-type disposable diaper according to the present invention can also be applied as disposable diapers for children (for infants), sanitary shorts, and the like.

<< Basic configuration of diaper 300 >>
FIG. 8 is a schematic perspective view of a pants-type disposable diaper 300 (hereinafter also referred to as a diaper 300). FIG. 9 is a schematic plan view of the diaper 300 in the unfolded and extended state. 10 is a schematic cross-sectional view taken along the line II (the center in the left-right direction) of FIG. FIG. 11A is a diagram illustrating an example of a joining portion 350 of the front belt portion 321 and the rear belt portion 322, and FIG. 11B is a schematic cross-sectional view of the front belt portion 321 and the rear belt portion 322.

The diaper 300 has an up-down direction, a left-right direction, and a front-rear direction that intersect with each other, and also has a thickness direction in which the members are stacked as shown in FIG. In the up and down direction, the side that becomes the wearer's trunk side is the upper side, and the side that becomes the wearer's crotch is the lower side. In the front-rear direction, the side that becomes the wearer's stomach side is the front side, and the side that becomes the wearer's back side is the rear side. In the thickness direction, the side in contact with the wearer is the skin side, and the opposite side is the non-skin side.

The diaper 300 has an absorbent main body 310 and an exterior body 320 positioned on the non-skin side of the absorbent main body 310. The exterior body 320 includes a front belt portion 321 disposed on the wearer's belly side, a rear belt portion 322 disposed on the wearer's back side, and a crotch portion 323 connecting them.

In addition, in the diaper 300 of this embodiment, although the exterior body 320 is comprised from 3 members (The front side belt part 321, the rear side belt part 322, and the crotch part 323), it is not restricted to this. For example, the front belt part 321, the rear belt part 322, and the crotch part 323 may be constituted by one continuous member. Moreover, it is good also as a structure which does not have the crotch part 323. FIG.

In the unfolded diaper 300 shown in FIG. 9, the front belt portion 321 is located on one end side in the longitudinal direction of the absorbent main body 310, and the rear belt portion 322 is located on the other end side in the longitudinal direction of the absorbent main body 310. positioned. In the unfolded state diaper 300, the absorbent main body 310 is folded in half at the approximate center in the longitudinal direction, and the left and right side portions of the front belt portion 321 and the left and right side portions of the rear belt portion 322 are paired. By being locked at the stop portion 324, the pants shape shown in FIG. 8 is obtained. That is, the longitudinal direction of the absorbent main body 310 is along the vertical direction of the diaper 300, the front belt portion 321 and the rear belt portion 322 are connected in an annular shape, the waist opening 300a is formed at the upper end thereof, A pair of leg opening 300b is formed. In addition, as a locking method by the locking part 324, welding, joining with an adhesive agent, etc. can be illustrated.

As shown in FIG. 10, the absorbent main body 310 includes an absorbent core 311, a liquid-permeable top sheet 312 located on the skin side of the absorbent core 311, and a back located on the non-skin side of the absorbent core 311. And a sheet 313. The back sheet 313 of this embodiment has a two-layer structure of a liquid impermeable sheet 313a and a hydrophobic liquid permeable sheet (for example, a hydrophobic nonwoven fabric) 313b arranged on the non-skin side.

The absorbent core 311 is a member that absorbs and holds excretory fluid such as urine, and is formed of, for example, liquid absorbent fibers such as pulp fibers mixed with a superabsorbent polymer (SAP). Although not shown, the outer peripheral surface of the absorbent core 311 may be covered with a liquid-permeable sheet such as tissue paper or nonwoven fabric.

As shown in FIG. 9, the front belt portion 321 and the rear belt portion 322 are respectively provided on the lower side of the

waistline regions

3211 and 3221 and the

waistline regions

3211 and 3221, which are portions overlapping with the locking portions 324 in the vertical direction. And

crotch side regions

3212 and 3222.

The

crotch side regions

3212 and 3222 have a substantially trapezoidal shape, and the lateral width (length in the left-right direction) becomes narrower toward the lower side. Further, the crotch side region 3222 is larger in the rear belt portion 322 than in the front belt portion 321, and the wearer's buttocks can be covered.

As shown in FIG. 10, the front belt part 321 and the rear belt part 322 are

skin side sheets

3213 and 3223,

non-skin side sheets

3214 and 3224, and stretchable

nonwoven fabrics

3215 and 3225 positioned between them. have. Examples of the skin-

side sheets

3213 and 3223 and the non-skin-

side sheets

3214 and 3224 include flexible sheets formed of spunbond nonwoven fabric or SMS nonwoven fabric. The

skin side sheets

3213 and 3223 and the

non-skin side sheets

3214 and 3224 are non-stretchable sheets that do not substantially stretch.

The stretchable

nonwoven fabrics

3215 and 3225 are at least sheets that stretch and contract in the left-right direction of the diaper 300. In addition, the stretchable

nonwoven fabrics

3215 and 3225 are nonwoven fabrics including stretchable fibers and non-stretchable fibers (that is, extensible fibers having lower shrinkage than stretchable fibers).

As the stretchable

nonwoven fabrics

3215 and 3225, non-stretching of a polyurethane elastomer stretchable fiber, which is a kind of elastic thermoplastic elastomer, and a polyolefin resin polypropylene (PP), which is a kind of thermoplastic resin having inelasticity. Non-woven fabric in which an appropriate stretching process such as gear stretching is applied to the conductive fiber can be exemplified. The stretching process may be performed in a direction orthogonal to each other (the left-right direction and the up-down direction of the diaper 300) or may be performed only in a predetermined direction (the left-right direction of the diaper 300). Also good. In addition, when a stretching process is performed only in a predetermined direction, stretchability in a predetermined direction is expressed, but not all fiber orientations are along the predetermined direction, and therefore in a direction orthogonal to the predetermined direction. Elasticity is expressed.

And the skin side sheet |

seats

3213 and 3223, the non-skin side sheet |

seats

3214 and 3224, and the

elastic nonwoven fabric

3215 and 3225 are joined by the junction part 350 in the state which the

elastic nonwoven fabric

3215 and 3225 is extending | stretching in the left-right direction. ing. As shown in FIG. 11A, the joint portions 350 may be scattered in the left-right direction and the up-down direction of the diaper 300. By doing so, when the diaper 300 contracts, the skin-

side sheets

3213 and 3223 and the non-skin-

side sheets

3214 and 3224 are folded between the joint portions 350 to form convex portions protruding outward in the thickness direction. . On the other hand, the stretchable

nonwoven fabrics

3215 and 3225 expand in the thickness direction because the stretchable fibers contract while collecting (collecting) the non-stretchable fibers. Therefore, the convex portion is supported by the fibers of the stretchable

nonwoven fabrics

3215 and 3225 and is not easily crushed, and the cushioning property of the convex portion is increased. Therefore, the wear of the front belt part 321 and the rear belt part 322 to the wearer can be improved. In addition, an impression that the diaper 300 is visually soft can be given to the user.

Also, the crotch part 323 has a configuration in which a stretchable nonwoven fabric 3233 is disposed between the skin side sheet 3231 and the non-skin side sheet 3232, similarly to the front belt part 321 and the rear belt part 322. However, the configuration of the crotch part 323 is not particularly limited. For example, the crotch part 323 does not include the skin-side sheet 3231, and the stretchable nonwoven fabric 3233 is disposed between the absorbent main body 310 and the non-skin-side sheet 3232. Also good.

<< Regarding Low Pressure Region 330 and High Pressure Region 340 >>
FIG. 12 is a schematic plan view of the rear belt portion 322. FIG. 13 is a schematic plan view of the front belt portion 321. 14A and 14B are explanatory diagrams of the middle ankle muscle 360. FIG.

The front belt portion 321 and the rear belt portion 322 have a low pressure region 330 and a high pressure region 340, respectively, in waistline regions 3211 and 3221 (see FIG. 9) that overlap the locking portion 324 in the vertical direction.

The low pressure region 330 is a region where stretchable

nonwoven fabrics

3215 and 3225 are disposed between the

skin side sheets

3213 and 3223 and the

non-skin side sheets

3214 and 3224. The high pressure region 340 is a region where stretchable

nonwoven fabrics

3215 and 3225 and a stretchable film 343 are disposed between the

skin side sheets

3213 and 3223 and the

non-skin side sheets

3214 and 3224. The stretchable film 343 is a sheet that stretches at least in the left-right direction of the diaper 300. Therefore, the low pressure region 330 and the high pressure region 340 have elasticity in the left-right direction.

Examples of the stretchable film 343 include a stretchable elastic member in which an elastomer resin such as urethane or styrene is melted to form a sheet having a uniform thickness. Further, for example, a stretchable film in which a polyolefin layer is integrated on the front and back surfaces of an elastomer layer may be used. When this stretchable film is used, since the polyolefin layer does not have stretchability, stretchability can be expressed by previously stretching the film. The presence of the polyolefin layer on the surface has an advantage that it is easy to weld with the polyolefin fiber nonwoven fabric.

In the high pressure region 340, the tightening pressure when wearing the diaper is higher than the low pressure region 330 by the amount of the stretchable film 343 disposed. Specifically, the force for extending the unit pressure in the up-down direction by a unit length in the left-right direction is the force for extending the unit pressure in the up-down direction by a unit length in the left-right direction. Greater than power. That is, the contraction force acting in the left-right direction in the high-pressure region 340 having the unit width is larger than the contraction force acting in the left-right direction in the low-pressure region 330 having the unit width, and the high-pressure region 340 closely adheres to the wearer.

However, the stretchable film 343 is not limited to be disposed throughout the high pressure region 340. For example, as shown in FIGS. 12 and 13, a plurality of stretchable films 343A to 343F and 343a to 343f extending in the left-right direction may be arranged at intervals in the up-down direction. In this case, among the plurality of stretchable members (here, stretchable film 343) forming the high pressure region 340, the uppermost stretchable members (343A, 343a) and the bottommost stretchable And a region surrounded by a pair of locking portions 324 (regions surrounded by 3a, 3b, 3c, 3d shown in FIG. 12, 3e, 3f, 3g, shown in FIG. A region surrounded by 3 h) is defined as a high pressure region 340.

In addition, a waist thread rubber 326 is disposed at the upper end portions of the front belt portion 321 and the rear belt portion 322 of the present embodiment, and the

stretch nonwoven fabrics

3215 and 3225 and the stretch film 343 are not disposed. In addition, stretchable

nonwoven fabrics

3215 and 3225 are disposed in the entire region below the waist rubber thread 326. However, the present invention is not limited to the above, and elastic

nonwoven fabrics

3215 and 3225 may be disposed on the upper end portions of the front belt portion 321 and the rear belt portion 322 so as to overlap the waist rubber thread 326.

In the waistline region 3221 of the rear belt portion 322, a region below the high pressure region 340 is defined as a low pressure region 330. On the other hand, in the waistline region 3211 of the front belt portion 321, a region above the high pressure region 340 and a region below the waist thread rubber 326 is defined as a low pressure region 330. When the rear belt portion 322 includes the leg-around thread rubber 327, the portion where the leg-around thread rubber 327 is disposed is excluded from the low pressure region 330. However, for easy understanding in FIGS. 9 and 12, the part where the leg-around thread rubber 327 is arranged is also surrounded by a thick line as the low pressure region 330.

Further, a force for extending the unit pressure in the vertical direction by a unit length in the left-right direction and a force for extending the unit pressure in the vertical direction by a unit length in the left-right direction. The comparison may be performed by a known method. For example, all of the high pressure region 340 and the low pressure region 330 are cut out from the rear belt portion 322 or the front belt portion 321 as samples. And the average value of the length of the up-down direction of each sample is calculated. Moreover, the both ends of the sample corresponding to the left-right direction of the diaper 300 are pinched | interposed into the chuck | zipper of a tensile tester. The load obtained in a state where the sample is extended by separating the chuck by a unit length is measured. And it is good to compare the value which remove | divided the load of each sample by the average value of the length of the up-down direction of each sample. When the low pressure region 330 of the rear belt portion 322 is cut out in a range including a portion where the leg circumference thread rubber 327 is disposed (a range indicated by a thick line in FIG. 12), the leg circumference thread rubber 327 is stretchable. Measure the load in a state where no spillage occurs.

In the following description, the low pressure region 330 and the high pressure region 340 of the rear belt portion 322 are referred to as “rear low pressure region 331” and “rear high pressure region 341”, and the low pressure region 330 of the front belt portion 321 is referred to. The high pressure region 340 is referred to as a “front low pressure region 332” and a “front high pressure region 342”.

The rear high pressure region 341 is continuously arranged in the left-right direction across the pair of locking portions 324 as shown in FIGS. 9 and 12. If the end of the rear high pressure region 341 is located at the edge of the leg opening 300b, the rear high pressure region 341 contracts to widen the leg opening 300b, and the rear high pressure region 341 Tightening pressure (adhesion) will be reduced. On the other hand, in the present embodiment, the rear high pressure region 341 is connected to the front belt portion 321 via the locking portion 324. Therefore, it can suppress that the clamping pressure of the rear side high pressure area | region 341 reduces.

In addition, the both ends 3411 in the left-right direction of the rear high pressure region 341 are longer in the vertical direction of the rear high pressure region 341 (L31> L32) than the central portion 3412, and the rear high pressure region 341 has a rear height. The lower end 341a of the pressure region 341 is located below.

That is, as shown in FIG. 14A, the rear high pressure region 341 is arranged in accordance with the shape of the middle gluteal muscle 360 of the wearer (human body). Therefore, when the diaper 300 is worn, the rear high pressure region 341 can tighten the wearer's middle gluteal muscle 360 and can assist the movement of the middle gluteal muscle 360. As a result, the pelvis during movement such as walking is stabilized and can support the wearer's movement (walking).

Note that the positional relationship between the vertical lengths (L31, L32) and the lower end (341a) may be established at least in the left and right ends and the center of the rear high pressure region 341. Preferably, it is established at both end portions 3411 having a length of 1/3 of the entire length from both ends in the left-right direction of the rear high pressure region 341 and a central portion 3412 therebetween.

In addition, when comparing the length and position of the rear high pressure region 341, it is preferable that the rear belt portion 322 is stretched without any problem. Specifically, the rear belt part 322 is extended until the dimension of the member (for example, the skin side sheet 3223) constituting the rear belt part 322 is equal to or close to the dimension of the member itself. State. The same applies to the comparison of other lengths and positions described later.

Further, a rear low pressure region 331 is disposed adjacent to the lower side of the rear high pressure region 341 at the center in the left-right direction of the rear belt portion 322. Specifically, it is only necessary that the rear low pressure region 331 is positioned at least in the center in the left-right direction of the rear belt portion 322, and preferably, one third of the whole from the both ends in the left-right direction of the rear belt portion 322. It is preferable that the rear low pressure region 331 is located in the central portion between the two ends.

As shown in FIG. 14A, only the large gluteal muscle 361 that does not overlap the middle gluteal muscle 360 is located in the center of the buttock of the wearer (human body). The central part of the buttocks where only the great gluteal muscle 361 is located greatly expands and contracts during operations such as sitting and walking. Therefore, if the rear high pressure region 341 is located at the center of the buttock, friction is likely to occur between the wearer and the diaper 300, and the comfort of the diaper 300 is reduced. On the other hand, in this embodiment, the rear side low pressure area | region 331 is arrange | positioned according to the collar part center part. Therefore, the center part of the buttocks where the muscles and the skin are stretched and contracted is not excessively tightened, the friction generated between the wearer and the diaper 300 can be reduced, and the wearing comfort of the diaper 300 can be improved.

Moreover, since the back side low pressure area | region 331 has a stretching property, it can fit moderately in the center part of the buttocks, and can suppress the position shift of the diaper 300. As a result, the state in which the rear high pressure region 341 is fitted to the middle ankle is maintained, and the movement support (walking support) of the wearer is maintained.

Further, it is preferable that the lower end 341a of the rear high pressure region 341 is inclined downward from the central portion 3412 in the left-right direction of the rear high pressure region 341 toward both end portions 3411. That is, the length in the vertical direction of the rear high pressure region 341 is preferably gradually increased from the center portion 3412 in the left-right direction of the rear high pressure region 341 toward both end portions 3411.

By doing so, the rear high pressure region 341 has a shape that is closer to the wearer's middle barbs 360 (FIG. 14A). Therefore, the support force of the middle ankle muscle 360 by the rear high pressure region 341, that is, the wearer's motion support force (walking support force) is increased. In addition, although the lower end 341a of the back side high pressure area | region 341 illustrated in FIG. 12 inclines in the smooth curve shape, you may incline not only to this but a linear form or step shape, for example.

Further, it is preferable that the rear high pressure region 341 is disposed without overlapping the rear side portion of the absorbent core 311 in the front-rear direction (in the thickness direction of the rear belt portion 322). By doing so, it can suppress that the absorptive core 311 contracts in the left-right direction by the back side high pressure area | region 341 with a strong contractive force, and the thick absorbent core 311 becomes uneven | corrugated shape. That is, since the flatness of the absorbent core 311 is maintained and a feeling of strangeness at the time of wearing does not easily occur, the wearing comfort of the diaper 300 can be improved. In addition, let the rear side part of the absorptive core 311 be a site | part of the back side (back side) rather than the center of the longitudinal direction of the absorptive core 311. FIG. Moreover, it is not limited to the above, The back side high pressure area | region 341 and the absorptive core 311 may overlap.

The rear low pressure region 331 is preferably disposed at least between the lower end 341a of the rear high pressure region 341 and the upper end 311a of the rear side portion of the absorbent core 311. By doing so, the back side low pressure area | region 331 can fit moderately to the wider range of a wearer's greater gluteal muscle. Therefore, the position shift of the diaper 300 can be suppressed.

Furthermore, it is preferable that the rear low pressure region 331 extends in the left-right direction not only in the central portion in the left-right direction of the rear belt portion 322 but also in at least a part of both ends. Specifically, when the rear belt portion 322 has a length of 1/3 of the entire length from both ends in the left-right direction as both ends, and the rear low pressure region 331 is disposed at least at a part of both ends. Good. More preferably, the rear low pressure region 331 is disposed between the pair of locking portions 324. By doing so, the back side low pressure area | region 331 can fit moderately to the wider range of a wearer's greater gluteal muscle.

As shown in FIG. 13, the stretchable film 343 (front stretchable member) included in the front high pressure region 342 may be disposed continuously in the left-right direction across the pair of locking portions 324. . And in the latching | locking part 324, it is good for the rear side high pressure area | region 341 to be connected with the front side high pressure area | region 342. FIG. In other words, in the locking portion 324, the vertical positions of the rear high pressure region 341 and the front high pressure region 342 may be partially or entirely aligned.

By doing so, an annular expansion / contraction region is formed by the rear high pressure region 341 and the front high pressure region 342. Therefore, the diaper 300 fits around the wearer's waist and the displacement of the diaper 300 can be suppressed. Further, since the tightening pressure in the rear high pressure region 341 is increased, the support force of the middle ankle muscle 360 by the rear high pressure region 341 is increased.

In the rear high pressure region 341 and the front high pressure region 342 of this embodiment, the stretchable films 343A to 343F (rear stretchable members) and 343a to 343f (front stretchable members) are spaced apart in the vertical direction. Several are arranged. In this case, in the latching | locking part 324, uppermost

elastic films

343A and 343a are connected, and the lowermost

elastic films

343F and 343f are good to be connected. By doing so, the above effect can be obtained. Preferably, the second

stretchable films

343B and 343b from the top, the third

stretchable films

343C and 343c from the top, the fourth

stretchable films

343D and 343d from the top, the fifth stretchable film from the top 343E and 343e are also preferably connected to each other at the locking portion 324.

However, the present invention is not limited to the above, and the rear high pressure region 341 and the front high pressure region 342 (front elastic member) may be arranged so as to be shifted in the vertical direction at the locking portion 324. Further, the front belt portion 321 may not have the high pressure region 340 and may not have the stretchable member. For example, the stretchable film 343 may not be disposed on the front belt portion 321 and only the stretchable nonwoven fabric 3215 may be disposed. Further, instead of the stretchable film 343 and the stretchable nonwoven fabric 3215, a thread-like elastic member such as thread rubber may be disposed. Also in these cases, the elastic nonwoven fabric 3215 and the thread-like elastic member are preferably continuous in the left-right direction across the pair of locking portions 324 and connected to the rear high pressure region 341 at the locking portions 324. . By doing so, the above effect can be obtained.

Also, as shown in FIG. 14B, the middle ankle muscle 360 is located from the back side to the side of the human body. Therefore, as shown in FIG. 13, the length in the vertical direction of the front high pressure region 342 is longer at the left and right ends 3421 of the front high pressure region 342 than at the center 3422 (L33> L34). And the upper end 342a of the front side high pressure area | region 342 is good to be located upwards.

As described above, when the left and right ends 3421 of the front high pressure region 342 are relatively located above and the length in the vertical direction (L33) is long, the front high pressure region 342 is located in the side of the wearer. Can adhere to the gluteal muscle. Therefore, a wider range of the wearer's middle muscle can be tightened by the rear high pressure region 341 and the front high pressure region 342. Therefore, a wearer's motion support power (walking support power) increases.

On the other hand, the central portion 3422 in the left-right direction of the front high pressure region 342 is located relatively below and below the bulge of the wearer's abdomen. Therefore, the wearer's abdomen is not excessively tightened in the front high pressure region 342, and the wearing comfort of the diaper 300 can be improved.

It should be noted that the positional relationship between the vertical lengths (L33, L34) and the upper end (342a) may be established at least in the left and right ends and the center of the front high pressure region 342. Preferably, the front side high pressure region 342 is established at both ends 3421 having a length of 1/3 from the both ends in the left-right direction and a central portion 3422 therebetween. However, the shape of the front high pressure region 342 is not limited to the above.

Further, it is preferable that the front low pressure region 332 is disposed adjacent to the upper side of the front high pressure region 342 at the center in the left-right direction of the front belt portion 321. Specifically, it is sufficient that the front low pressure region 332 is positioned at least in the center in the left-right direction of the front belt portion 321. It is preferable that the front low pressure region 332 is located at the center between the two ends. By doing so, the front side low pressure area | region 332 can fit a wearer's abdomen moderately, and can suppress the position shift of the diaper 300. FIG.

Further, it is preferable that the front high pressure region 342 is disposed without overlapping the front side portion of the absorbent core 311 in the front-rear direction. By doing so, it can suppress that the absorptive core 311 shrink | contracts in the left-right direction by the front side high pressure area | region 342. FIG. Therefore, the flatness of the absorbent core 311 is maintained, so that a feeling of strangeness at the time of wearing does not easily occur, and the wearing comfort of the diaper 300 can be improved. In addition, let the front side part of the absorptive core 311 be a site | part of the front side (abdominal side) rather than the center of the longitudinal direction of the absorptive core 311. FIG. Moreover, it is not limited above, The front side high pressure area | region 342 and the absorptive core 311 may overlap.

In addition, it is preferable that a plurality of the stretchable films 343A to 343F and 343a to 343f included in the rear high pressure region 341 and the front high pressure region 342 are arranged at intervals in the vertical direction. The portion between the stretchable films 343 adjacent to each other in the vertical direction has better air permeability in the thickness direction because the number of stacked sheets is smaller than the portion where the stretchable film 343 is disposed. Therefore, the humid air in the diaper 300 can be discharged from the portion between the stretchable films 343 to the non-skin side in the thickness direction, and the stuffiness in the diaper 300 can be suppressed. Therefore, the wearing comfort of the diaper 300 can be improved.

In particular, when the stretchable film 343 is disposed in the high pressure region 340, the air permeability in the thickness direction is reduced as compared with the case where a stretchable nonwoven fabric or a thread-like elastic member is disposed. Therefore, the stretchable film 343 is preferably arranged with a space in the vertical direction. However, it is not limited to the above, and the stretchable film 343 may be disposed in the entire high pressure region 340.

Further, in each of the rear high pressure region 341 and the front high pressure region 342, the elastic films 343A to 343F, which are adjacent to each other in the left and right ends 3411 and 3421 in the vertical direction, compared to the

central portions

3412 and 3422, The interval (length in the vertical direction) between 343a to 343f may be increased. By doing so, in each of the rear side high pressure region 341 and the front side high pressure region 342, the lengths in the vertical direction are longer at the left and

right end portions

3411 and 3421 than at the central portions 3412 and 3422 ( L31> L32, L33> L34). Therefore, the rear high pressure region 341 and the front high pressure region 342 can be fitted to the middle ankle.

Also, it is preferable that the stretchable members (here, the stretchable film 343) disposed in the rear high pressure region 341 and the front high pressure region 342 are sheet-like stretchable members.

By doing so, the rear side high pressure region 341 and the front side high pressure region 342 fit face to the wearer's middle fin, so that a wider range of the wearer's middle rod can be tightened. Therefore, a wearer's motion support power (walking support power) increases. Further, if it is attempted to obtain a tightening pressure similar to that of the sheet-like stretchable member by the thread-like elastic member, it is necessary to increase the expansion ratio of the thread-like elastic member. If it does so, a thread-like elastic member will closely_contact | adhere to a wearer locally, and the goodness of the wearing comfort of the diaper 300 will be reduced.

Similarly, the stretchable members (here, stretchable nonwoven fabrics 3215 and 3225) disposed in the rear low pressure region 331 and the front low pressure region 332 are also preferably sheet-like stretchable members. By doing so, the rear low pressure region 331 and the front low pressure region 332 fit on the wearer's abdomen and greater gluteal muscles in a plane, so that the abdomen and greater gluteal muscles are not locally tightened, and the diaper 300 The comfort of wearing can be improved. A stretchable nonwoven fabric may be disposed instead of the stretchable film 343, and the stretchable nonwoven fabric may be stacked in two layers in the high pressure region 340.

However, it is not limited to the above. For example, the low pressure region 330 is formed by disposing the thread-like elastic members in the vertical direction across the wide range of the front belt portion 321 and the rear belt portion 322, and the portion forming the high pressure region 340 Further, another stretchable member (stretchable film, stretchable non-woven fabric, threadlike elastic member, etc.) may be placed on the threadlike elastic member. On the contrary, a low-pressure region 330 is formed by arranging sheet-like stretchable members (stretchable film, stretchable nonwoven fabric) over a wide range of the front belt portion 321 and the rear belt portion 322, and the high pressure region 340. A thread-like elastic member may be disposed on the sheet-forming portion so as to overlap the sheet-like stretchable member. Further, a stretchable film is arranged over a wide range of the front belt portion 321 and the rear belt portion 322 to form a low pressure region 330, and a portion forming the high pressure region 340 is overlapped with the stretchable film. A sheet-like stretchable member (stretchable film, stretchable nonwoven fabric) may be disposed. Further, the configuration of the low pressure region 330 and the high pressure region 340 may be the same, and the stretch ratio of the stretchable member in the high pressure region 340 may be increased as compared with the stretch ratio of the stretchable member in the low pressure region 330.

Also, leg rubber thread 327 (elastic member) may be disposed along the pair of leg openings 300b of the diaper 300. By doing so, since the rubber thread 327 for the leg circumference is in close contact with the wearer's leg circumference (contour part of the buttock), the diaper 300 can be prevented from being pulled up too much during wearing or during wearing. Therefore, the state in which the rear high pressure region 341 is fitted to the middle gluteal muscle is maintained, and the movement support (walking support) of the wearer is maintained. Note that a sheet-like stretchable member may be disposed along the leg opening 1b instead of the rubber thread. Moreover, not only the above but the elastic member may not be arrange | positioned along the leg periphery opening part 1b.

=== Third Embodiment ===
Hereinafter, as a pants-type disposable diaper, a pants-type disposable diaper for adults is taken as an example to describe a third embodiment. However, the present invention is not limited to this, and the pants-type disposable diaper according to the present invention can also be applied as disposable diapers for children (for infants), sanitary shorts, and the like.

<< Basic configuration of diaper 500 >>
FIG. 15 is a schematic perspective view of a pants-type disposable diaper 500 (hereinafter also referred to as diaper 500). FIG. 16 is a schematic plan view of the diaper 500 in the unfolded and extended state. FIG. 17 is a schematic cross-sectional view taken along the line II (the center in the left-right direction) of FIG. 18A is a diagram illustrating an example of a joint 530 between the front belt portion 521 and the rear belt portion 522, and FIG. 18B is a schematic cross-sectional view of the front belt portion 521 and the rear belt portion 522.

The diaper 500 has an up-down direction, a left-right direction, and a front-rear direction that intersect with each other, and also has a thickness direction in which the members are stacked as shown in FIG. In the up and down direction, the side that becomes the wearer's trunk side is the upper side, and the side that becomes the wearer's crotch is the lower side. In the front-rear direction, the side that becomes the wearer's stomach side is the front side, and the side that becomes the wearer's back side is the rear side. In the thickness direction, the side in contact with the wearer is the skin side, and the opposite side is the non-skin side.

The diaper 500 includes an absorbent main body 510 and an exterior body 520 located on the non-skin side of the absorbent main body 510. The exterior body 520 includes a front belt portion 521 (belt portion) disposed on the stomach side of the wearer, a rear belt portion 522 (belt portion) disposed on the back side of the wearer, and a crotch portion 523 connecting them. And have.

In addition, in the diaper 500 of this embodiment, although the exterior body 520 is comprised from 3 members (The front side belt part 521, the rear side belt part 522, and the crotch part 523), it is not restricted to this. For example, the front belt part 521, the rear belt part 522, and the crotch part 523 may be configured by one continuous member. Moreover, it is good also as a structure which does not have the crotch part 523.

In the diaper 500 in the unfolded state shown in FIG. 16, the front belt portion 521 is located on one end side in the longitudinal direction of the absorbent main body 510, and the rear belt portion 522 is located on the other end side in the longitudinal direction of the absorbent main body 510. positioned. In the unfolded diaper 500, the absorbent main body 510 is folded in half at the approximate center in the longitudinal direction, and the left and right side portions of the front belt portion 521 and the left and right side portions of the rear belt portion 522 are paired together. By being locked at the stop portion 524, the pants shape shown in FIG. 15 is obtained. That is, the longitudinal direction of the absorbent main body 510 is along the vertical direction of the diaper 500, the front belt portion 521 and the rear belt portion 522 are connected in a ring shape, and a waist opening 500a is formed at the upper end thereof. A pair of leg opening 500b is formed. In addition, as a locking method by the locking part 524, welding, joining by an adhesive agent, etc. can be illustrated.

As shown in FIG. 17, the absorbent main body 510 includes an absorbent core 511, a liquid-permeable top sheet 512 positioned on the skin side of the absorbent core 511, and a back positioned on the non-skin side of the absorbent core 511. And a sheet 513. The back sheet 513 of the present embodiment has a two-layer structure of a liquid impermeable sheet 513a and a hydrophobic liquid permeable sheet (for example, a hydrophobic nonwoven fabric) 513b arranged on the non-skin side.

The absorbent core 511 is a member that absorbs and holds excretory fluid such as urine, and is formed of, for example, liquid absorbent fibers such as pulp fibers mixed with a super absorbent polymer (SAP). Although not shown, the outer peripheral surface of the absorbent core 511 may be covered with a liquid-permeable sheet such as tissue paper or nonwoven fabric.

As shown in FIG. 16, the front belt portion 521 and the rear belt portion 522 are respectively disposed below the

waistline regions

5211 and 5221 and the

waistline regions

5211 and 5221 which are portions overlapping with the locking portions 524 in the vertical direction. And

crotch side regions

5212 and 5222.

The

crotch side regions

5212 and 5222 have a substantially trapezoidal shape, and the lateral width (length in the left-right direction) decreases toward the lower side. Further, the rear belt portion 522 has a larger crotch region 5222 than the front belt portion 521, and can cover the buttocks of the wearer.

As shown in FIG. 17, the front belt portion 521 and the rear belt portion 522 are skin-

side sheets

5213 and 5223, non-skin-

side sheets

5214 and 5224, and stretchable

nonwoven fabrics

5215 and 5225 positioned therebetween, respectively. have. Examples of the skin-

side sheets

5213 and 5223 and the non-skin-

side sheets

5214 and 5224 include flexible sheets formed of spunbond nonwoven fabric or SMS nonwoven fabric. The skin-

side sheets

5213 and 5223 and the non-skin-

side sheets

5214 and 5224 are non-stretchable sheets that do not substantially stretch.

The stretchable

nonwoven fabrics

5215 and 5225 are sheets that stretch at least in the left-right direction of the diaper 500. In addition, the stretchable

nonwoven fabrics

5215 and 5225 are nonwoven fabrics including stretchable fibers and non-stretchable fibers (that is, extensible fibers having lower shrinkage than stretchable fibers).

As the stretchable

nonwoven fabrics

5215 and 5225, non-stretching of a polyurethane-based elastomer stretchable fiber, which is a kind of elastic thermoplastic elastomer, and a polyolefin resin, polypropylene (PP), which is a kind of inelastic thermoplastic resin, is used. Non-woven fabric in which an appropriate stretching process such as gear stretching is applied to the conductive fiber can be exemplified. The stretching process may be performed in a direction orthogonal to each other (the horizontal direction and the vertical direction of the diaper 500), or may be performed only in a predetermined direction (the horizontal direction of the diaper 500). Also good. In addition, when a stretching process is performed only in a predetermined direction, stretchability in a predetermined direction is expressed, but not all fiber orientations are along the predetermined direction, and therefore in a direction orthogonal to the predetermined direction. Elasticity is expressed.

And the skin side sheet |

seat

5213,5223, the non-skin side sheet |

seat

5214,5224, and the

elastic nonwoven fabric

5215,5225 are joined by the junction part 530 in the state which the

elastic nonwoven fabric

5215,5225 is extended in the left-right direction. ing. As illustrated in FIG. 18A, the joints 530 may be scattered in the left-right direction and the up-down direction of the diaper 500. By doing so, when the diaper 500 contracts, the skin-

side sheets

5213 and 5223 and the non-skin-

side sheets

5214 and 5224 are folded between the joint portions 530 to form convex portions protruding outward in the thickness direction. . On the other hand, the stretchable

nonwoven fabrics

5215 and 5225 spread in the thickness direction because the stretchable fibers contract while gathering (collecting) the non-stretchable fibers. Therefore, the convex portion is supported by the fibers of the stretchable

nonwoven fabrics

5215 and 5225 and is not easily crushed, and the cushioning property of the convex portion is increased. Therefore, the wear of the front belt portion 521 and the rear belt portion 522 to the wearer can be improved. In addition, an impression that the diaper 500 is visually soft can be given to the user.

Also, the crotch part 523 has a configuration in which a stretchable nonwoven fabric 5233 is disposed between the skin-side sheet 5231 and the non-skin-side sheet 5232, similarly to the front belt part 521 and the rear belt part 522. However, the configuration of the crotch part 523 is not particularly limited. For example, the crotch part 523 does not include the skin-side sheet 5231 and the stretchable nonwoven fabric 5233 is disposed between the absorbent main body 510 and the non-skin-side sheet 5232. Also good.

<< About the high pressure region 560 >>
FIG. 19 is a schematic plan view of the front belt portion 521. FIG. 20 is a schematic plan view of the rear belt portion 522.

The front belt portion 521 and the rear belt portion 522 have a waist stretch region 540, a low pressure region 550, and a high pressure region 560 in the

waistline regions

5211 and 5221 that overlap with the locking portion 524 in the vertical direction.

The waist stretchable region 540 is a stretchable region along the edge of the waistline opening 500a, and a plurality of thread rubbers 541 that stretch in the left-right direction of the diaper 500 are arranged at intervals in the vertical direction. The waist stretchable region 540 may have a configuration in which the stretchable

nonwoven fabrics

5215 and 5225 are not disposed as shown in FIG. 17, or a configuration (not shown) in which the stretchable nonwoven fabric and the thread rubber 541 are laminated. Also good.

The low pressure region 550 and the high pressure region 560 are regions disposed below the waist stretchable region 540 and are adjacent to each other and have stretchability in the left-right direction. The low pressure region 550 is a region where stretchable

nonwoven fabrics

5215 and 5225 are disposed between the

skin side sheets

5213 and 5223 and the

non-skin side sheets

5214 and 5224. The high pressure region 560 is a region where the stretchable

nonwoven fabrics

5215 and 5225 and the stretchable film 565 are disposed between the

skin side sheets

5213 and 5223 and the

non-skin side sheets

5214 and 5224. The stretchable film 565 is a sheet that stretches at least in the left-right direction of the diaper 500.

As the stretchable film 565, an elastic member having stretchability by melting an elastomer resin such as urethane or styrene into a sheet having a uniform thickness can be exemplified. Further, for example, a stretchable film in which a polyolefin layer is integrated on the front and back surfaces of an elastomer layer may be used. When this stretchable film is used, since the polyolefin layer does not have stretchability, stretchability can be expressed by previously stretching the film. The presence of the polyolefin layer on the surface has an advantage that it is easy to weld with the polyolefin fiber nonwoven fabric.

In the high pressure region 560, the tightening pressure when wearing the diaper is higher than the low pressure region 550 by the amount of the stretchable film 565 disposed. Specifically, the force for extending the unit pressure in the up / down direction by a unit length in the left / right direction is a force for extending the unit pressure in the up / down direction by a unit length in the left / right direction. Greater than power. That is, the contraction force acting in the left-right direction in the high-pressure region 560 having a unit width in the vertical direction is larger than the contraction force acting in the left-right direction in the low-pressure region 550 having the unit width in the vertical direction. Adhere strongly.

However, the stretchable film 565 is not limited to the entire high pressure region 560. For example, as shown in FIGS. 19 and 20, a plurality of stretchable films 565a to 565f and 565A to 565F extending in the left-right direction may be arranged at intervals in the vertical direction. In that case, among the plurality of stretchable films 565 arranged in the same shape (same locus), the upper end of the stretchable film 565 located on the uppermost side, the lower end of the stretchable film 565 located on the lowermost side, A region surrounded by the pair of locking portions 524 is defined as one high pressure region.

Specifically, as shown in FIG. 19, the front belt portion 521 has a “first high pressure region 561” in which three elastic films 565a to 565c having a convex shape on the lower side are arranged. 5a, 5b, 5c, and 5d) and three elastic films 565d to 565f that are horizontal in the left-right direction of the diaper 500 are arranged as “second high pressure regions 562” (5e, 5f, 5g and 5h).

On the other hand, as shown in FIG. 20, the rear belt portion 522 includes a “third high pressure region 563” (5i, 5j, 5j, 565C) in which three elastic films 565A to 565C having a convex shape on the upper side are arranged. 5k, 5l) and the “fourth high pressure region 564” (5m, 5n, 5o, 5p) in which three elastic films 565D to 565F that are horizontal in the horizontal direction of the diaper 500 are arranged. Enclosed area).

Further, in the front belt portion 521 and the rear belt portion 522 of this embodiment, stretchable

nonwoven fabrics

5215 and 5225 are disposed in the entire region below the waist stretchable region 540 (see FIG. 17). Therefore, a region other than the first high pressure region 561 and the second high pressure region 562 in the region around the waist region 5211 of the front belt portion 521 and below the waist stretchable region 540 is defined as a low pressure region 550. . Similarly, a region other than the third high-pressure region 563 and the fourth high-pressure region 564 in the region around the waist region 5221 of the rear belt portion 522 and below the waist stretchable region 540 is defined as the low-pressure region 550. And However, in the case where the front belt portion 521 and the rear belt portion 522 have the leg circumference thread rubber 527 along the leg circumference opening 500b, the portion where the leg circumference thread rubber 527 is disposed is excluded from the low pressure region 550. To do.

Note that a force for extending the unit pressure in the left-right direction by a unit length in the vertical direction and a force for extending the unit pressure in the left-right direction by a unit length in the vertical direction. The comparison may be performed by a known method. For example, all or part of the high pressure region 560 and the low pressure region 550 are cut out from the rear belt portion 522 or the front belt portion 521 as samples. And the average value of the length of the up-down direction of each sample is calculated. Moreover, the both ends of the sample corresponding to the left-right direction of the diaper 500 are inserted into the chuck of the tensile tester. The load obtained in a state where the sample is extended by separating the chuck by a unit length is measured. And it is good to compare the value which remove | divided the load of each sample by the average value of the length of the up-down direction of each sample. In addition, when the low pressure region 550 is cut out in a range including a portion where the leg circumference thread rubber 527 is disposed, the load is measured in a state where the leg circumference thread rubber 527 does not exhibit stretchability.

Further, the high pressure region 560 only needs to have a higher clamping pressure than the low pressure region 550, and is not limited to the configuration in which the stretchable film 565 is laminated on the stretchable

nonwoven fabrics

5215 and 5225. For example, the low-pressure region 550 is formed by arranging the thread-like elastic members in the vertical direction across the wide range of the front belt portion 521 and the rear belt portion 522, and the high pressure region 560 is formed in a portion. Further, another stretchable member (stretchable film, stretchable non-woven fabric, threadlike elastic member, etc.) may be placed on the threadlike elastic member. On the contrary, a low-pressure region 550 is formed by arranging sheet-like stretchable members (stretchable film, stretchable nonwoven fabric) over a wide range of the front belt portion 521 and the rear belt portion 522, and the high pressure region 560. A thread-like elastic member may be disposed on the sheet-forming portion so as to overlap the sheet-like stretchable member. Further, a stretchable film is disposed over a wide range of the front belt portion 521 and the rear belt portion 522 to form a low pressure region 550, and a portion where the high pressure region 560 is formed is overlapped with the stretchable film. A sheet-like stretchable member (stretchable film, stretchable nonwoven fabric) may be disposed. Further, the configuration of the low pressure region 550 and the high pressure region 560 may be the same, and the stretch ratio of the stretchable member in the high pressure region 560 may be higher than the stretch ratio of the stretchable member in the low pressure region 550.

As described above, the front belt portion 521 and the rear belt portion 522 are partially provided with the high pressure region 560. Therefore, a place to be tightened by the wearer (for example, a place to prevent the diaper 500 from slipping down or a place to support the wearer's movement) can be fastened by the high pressure region 560. The low pressure region 550 also has elasticity. For this reason, the low pressure region 550 can be reasonably adhered except for the place where the wearer should tighten. Therefore, the fit of the diaper 500 can be improved while preventing the wearer from excessively tightening.

Further, in the diaper 500 of the present embodiment, the

skin side sheets

5213 and 5223, the

non-skin side sheets

5214 and 5224, and the stretchable

nonwoven fabrics

5215 and 5225 are white sheets, and the stretchable film 565 is a colored sheet (for example, purple) , Blue, pink, etc.). That is, the color of the stretchable film 565 is different from the color of the other sheets. By doing so, when the front belt portion 521 and the rear belt portion 522 are viewed from at least one of the non-skin side and the skin side, a part of the high pressure region 560 having the stretchable film 565 is a low pressure region. It becomes a color different from 550.

Thus, by making the high pressure region 560 visible, a user (a wearer or an assistant) of the diaper 500 can grasp the position of the high pressure region 560 in the diaper 500. Therefore, the user can adjust the raising condition of the diaper 500, confirming that the high pressure area | region 560 is located in the place which should wear a wearer. Therefore, the diaper 500 is correctly attached to an appropriate position of the wearer, and the effects of the high pressure region 560 (such as prevention of the diaper 500 from falling off and support of the wearer's movement) can be obtained. Moreover, it can prevent that the high pressure area | region 560 is located in the place (for example, a bulging part of a lower abdomen or a buttocks) which a wearer should not clamp | tighten, and the wearing comfort of the diaper 500 will fall.

More preferably, when the front belt portion 521 and the rear belt portion 522 are viewed from at least one of the non-skin side and the skin side, the contour portion of the high pressure region 560 in the vertical direction of the diaper 500 is the low pressure region 550. And a different color. For example, in the case of the first high pressure region 561 of the front belt portion 521, the colored stretchable film 565a is located at the upper end portion, and the colored stretchable film 565c is located at the lower end portion. Similarly, in the second to fourth high pressure regions 562 to 564, the stretchable film 565 colored at the upper end and the lower end is located.

By doing so, the boundary between the high pressure region 560 and the low pressure region 550 becomes clear, and the user can more easily grasp the position of the high pressure region 560. Therefore, the diaper 500 is easily attached to an appropriate position of the wearer.

Note that at least a part of the high pressure region 560 and the low pressure region 550 may have different colors, and a part other than the outline of the high pressure region 560 may have a different color, or the high pressure region 560 may have a different color. The whole area may be a different color. Further, the high pressure region 560 is not limited to being colored. That is, the material constituting the high pressure region 560 may be white, and the material constituting the low pressure region 550 may be colored. Further, the high pressure region 560 and the low pressure region 550 may be colored in different colors other than white.

FIG. 21 is a table showing the test results for the visibility of the high pressure region 560. A test was conducted to determine how much the color difference between the high pressure region 560 and the low pressure region 550 is a specific color difference so that the position of the high pressure region 560 can be grasped. First, belt samples 1 to 6 having various configurations were prepared. The configurations of Samples 1 to 6 are as follows.

Sample 1 uses a basis weight of 27 g / m 2 and a spunbonded nonwoven fabric as the

skin side sheets

5213 and 5223 and the

non-skin side sheets

5214 and 5224. As the stretchable

nonwoven fabrics

5215 and 5225, those having a basis weight of 28 g / m 2 and an elongation ratio of 2.3 times were used. Further, a dark beige stretchable film 565 is disposed in a portion between the

non-skin side sheets

5214 and 5224 and the stretchable

nonwoven fabrics

5215 and 5225. The arrangement of the stretchable film 565 is the arrangement shown in FIG. 16 (the same applies to other samples).

In sample 2, the color of the stretchable film 565 was light beige, and the rest of the configuration was the same as sample 1.

Sample 3 used a spunbond nonwoven fabric having a basis weight of 20 g / m 2 as the

skin side sheets

5213 and 5223 and the

non-skin side sheets

5214 and 5224. As the stretchable

nonwoven fabrics

non-skin side sheets

5214 and 5224 and the stretchable

nonwoven fabrics

5215 and 5225.

In sample 4, the color of the stretchable film 565 was light beige, and the other configuration was the same as that of sample 3.

Sample 5 uses a spunbonded nonwoven fabric having a basis weight of 19 g / m 2 and a lower white pigment (titanium oxide) content than the samples 1 to 4 as the skin-

side sheets

5213 and 5223 and the non-skin-

side sheets

5214 and 5224. . As the stretchable

nonwoven fabrics

non-skin side sheets

5214 and 5224 and the stretchable

nonwoven fabrics

5215 and 5225.

Sample 6 was made of light beige as the color of the stretchable film 565, and other configurations were the same as those of the sample 5.

The subjects evaluated whether the high-pressure region 560 and the low-pressure region 550 could be distinguished when the samples 1 to 6 were viewed from the skin side and the non-skin side, respectively. The subjects evaluated the samples 1 to 6 in a state where they were put on the doll of the appropriate size. When the high pressure region 560 and the low pressure region 550 can be discriminated, the evaluation was made in three stages: “◯”, discriminating but difficult to understand “Δ”, and if not discriminating “x”. Since the diaper 500 is an adult diaper, the subjects (AE) were five adult men and women in their 30s to 50s. The test was performed under an indoor fluorescent lamp (illuminance 407 Lx) with a horizontal distance of 40 cm between the samples 1 to 6 and the subject.

Further, the color difference ΔE * between the high pressure region 560 and the low pressure region 550 was measured when the samples 1 to 6 were viewed from the skin side and the non-skin side, respectively.

The color difference ΔE * was measured using a color difference meter (this time a color difference color meter ZE-6000 manufactured by Nippon Denshoku Industries Co., Ltd.). The measurement method was reflection, and the sample port was 30 mm in diameter. First, a sample to be measured (belt portion of the diaper 500) was placed in a natural state. When measuring the color difference ΔE * from the non-skin side, the measurement was performed with the non-skin side of the sample facing up, and when measuring the color difference ΔE * from the skin side, the skin side of the sample was facing up. .

Then, measurements were made at random multiple locations (5 locations this time) in the high pressure region 560, and respective measurement results (a * values and b * values in the L * a * b * color system) were obtained. The average value of the measurement results at a plurality of locations was taken as the measurement result of the high pressure region 560. Similarly, the measurement was performed at a plurality of random locations (5 locations this time) in the low pressure region 550, and the respective measurement results (a * value, b * value) were obtained. The average value of the measurement results at a plurality of locations was taken as the measurement result of the low pressure region 550.

Further, when the high pressure region 560 includes a portion of a color different from that of the low pressure region 550 (a portion where the colored stretchable film 565 is disposed), a measurement in which a different color portion and a non-different color portion from the low pressure region 550 are mixed. The location is included in a plurality of random measurement locations.

Then, based on the measurement result of the high pressure region 560 and the measurement result of the low pressure region 550, the color difference ΔE * is calculated by the following formula.
ΔE * = [(Δa *) 2+ (Δb *) 2] 1/2

Note that the L * value (brightness) is also included in the general definition of color difference. However, in the case of a diaper, the L * value is likely to change due to the difference in the number of laminated nonwoven fabrics, and as a result, the color difference changes. Therefore, there is a possibility that the color difference calculated including the L * value may deviate from the actually seen color difference. Therefore, the color difference ΔE * is calculated excluding the L * value.

The above test results are summarized in the table of FIG. With respect to the color difference ΔE * (sample) in which all subjects (A to E) can discriminate between the high pressure region 560 and the low pressure region 550, the visibility of the high pressure region 560 was set to “◯”. From the result of the table, when the color difference ΔE * is “1.45” or more, the visibility of the high pressure region 560 is “◯”.

Therefore, when the front belt portion 521 and the rear belt portion 522 are viewed from at least one of the non-skin side and the skin side, the L * a * b * color system in the high pressure region 560 and the low pressure region 550 is obtained. When the color difference ΔE * is calculated by the following equation, where the difference in a * value is Δa * and the difference in b * value is Δb *,
ΔE * = [(Δa *) 2+ (Δb *) 2] 1/2
The color difference ΔE * is preferably 1.45 or more.

By doing so, the high pressure region 560 and the low pressure region 550 are easily distinguished, and the user can easily grasp the position of the high pressure region 560. Therefore, the diaper 500 is easily attached to an appropriate position of the wearer. Note that the color difference ΔE * is measured by the method described in the above test or a method equivalent thereto.

Further, so far, when the front belt portion 521 and the rear belt portion 522 are viewed from at least one of the non-skin side and the skin side, the high pressure region 560 and the low pressure region 550 may have different colors. . However, more preferably, when the front belt portion 521 and the rear belt portion 522 are viewed from the non-skin side (outside), at least a part of the high pressure region 560 and the low pressure region 550 may have different colors. That is, the color difference ΔE * between the high pressure region 560 and the low pressure region 550 is preferably 1.45 or more.

By doing so, it becomes easy for the user to recognize that the diaper 500 has the high pressure region 560, and the user can easily wear the diaper 500 while being aware of the high pressure region 560. In addition, since the position of the high pressure region 560 can be grasped from the non-skin side, the high pressure region 560 can be easily aligned with the place to be tightened by the wearer. Therefore, the diaper 500 is easily attached to an appropriate position of the wearer.

Further, the stretchable member forming the high pressure region 560, that is, the stretchable film 565 in the present embodiment is preferably colored in a color different from that of the low pressure region 550. By doing so, the region recognized by the user as the high pressure region 560 matches the region where the tightening pressure is actually high. Therefore, the stretchable film 565 is aligned with the place to be tightened by the wearer, and the effect of the high pressure region 560 is easily obtained.

However, it is not limited to the above. At least one of other materials (skin-

side sheets

5213 and 5223, non-skin-

side sheets

5214 and 5224, and stretchable nonwoven fabrics 5215 and 5225) arranged in the high pressure region 560 is colored in a color different from that of the low pressure region 550. It may be. In this case, for example, even when the stretchable film 565 is intermittently arranged in the vertical direction, the entire high pressure region 560 can be colored. In addition, even when the stretchable film 565 is disposed over the entire high pressure region 560, a part of the high pressure region 560 (for example, a contour portion) can be colored.

When the stretchable film 565 is colored, the stretchable film 565 is disposed closer to the non-skin side among the plurality of materials stacked in the thickness direction of the front belt portion 521 and the rear belt portion 522. It is preferable. In this embodiment, as shown in FIG. 17, the elastic film 565 is arrange | positioned between the non-skin side sheet |

seat

5214,5224 and the

elastic nonwoven fabric

5215,5225.

By doing so, the visibility of the high pressure region 560 from the non-skin side is increased. Therefore, the high pressure region 560 can be easily recognized by the user, and the high pressure region 560 can be easily aligned with the place to be tightened by the wearer. However, it is not limited to the above, and the stretchable film 565 may be disposed closer to the

skin side sheets

5213 and 5223 than the

non-skin side sheets

5214 and 5224.

Further, the colored elastic member forming the high pressure region 560 is preferably a sheet-like elastic member like the elastic film 565 of the present embodiment. By doing so, compared with the case where the elastic member is rubber thread, the area of the different color portion which is a color different from the low pressure region 550 is increased. Therefore, the high pressure region 560 is conspicuous and is easily recognized by the user. Moreover, it becomes easy to align the high pressure area | region 560 in the place which should wear a wearer.

Further, when the stretchable member forming the high pressure region 560 is a sheet-like stretchable member, the high pressure region 560 can be strongly adhered to the wearer by the surface, and local tightening can be prevented. Therefore, the wearing comfort of the diaper 500 can be improved, and the marks of the elastic member are hardly left on the wearer's skin.

Further, it is preferable that a plurality of colored stretchable members (stretchable film 565) forming the high pressure region 560 are arranged at intervals in the vertical direction. By doing so, a striped pattern is formed in the high pressure region 560, and the striped pattern becomes an accent and stands out, and the high pressure region 560 is easily recognized by the user. In addition, since the high pressure region 560 is partially colored, it is possible to prevent the user from recognizing that the diaper 500 is too tight.

FIG. 22 is an explanatory diagram of the joint 530 formed on the stretchable film 565. As shown in FIG. 18B described above, the colored stretchable film 565 is a sheet disposed on the non-skin side of the stretchable film 565 (in the case of the present embodiment, non-skin side sheets 5214 and 5224) and And it is good to be joined intermittently by a plurality of joined parts 530.

By doing so, the

non-skin side sheets

5214 and 5224 float from the stretchable film 565 between the joint portions 530, and wrinkles (unevenness) due to the

non-skin side sheets

5214 and 5224 are generated. Therefore, it is possible to prevent the stretchable film 565 from being conspicuous while making the stretchable film 565 visible. That is, the hardness of the stretchable film 565 can be reduced by the wrinkles. Therefore, an impression that the diaper 500 is soft and comfortable to wear can be given to the user.

Furthermore, as shown in FIG. 22, the interval W2 between the joint portions 530 adjacent in the vertical direction is smaller than the length (width) W1 of the stretchable film 565 in the vertical direction (W1> W2), and It is preferable that the interval L0 between the joint portions 530 adjacent in the left-right direction is smaller than the length of the stretchable film 565 in the direction (the length between the pair of locking portions 524 in the case of the present embodiment).

By doing so, a plurality of joints 530 are disposed within the range of the stretchable film 565 in the vertical direction, and a plurality of joints 530 are disposed within the range of the stretchable film 565 in the left-right direction. Therefore, wrinkles due to the

non-skin side sheets

5214 and 5224 occur more finely. Therefore, an impression that the diaper 500 is soft and comfortable to wear can be given to the user.

However, not limited to the above, the entire region of the stretchable film 565 may be bonded to the

non-skin side sheets

5214 and 5224. In that case, the stretchable film 565 is conspicuous, and the visibility of the high pressure region 560 is increased.

In addition, when comparing the length of the elastic film 565 and the space | interval of the junction part 530, it is good to carry out in the state which extended the front side belt part 521 and the rear side belt part 522 thoroughly. Specifically, the members constituting the front belt portion 521 and the rear belt portion 522 (for example, the

non-skin side sheets

5214, 5224, etc.) are extended until the dimensions thereof are equal to or close to the dimensions of the member itself. It is in the state. The same applies to the comparison of other lengths and positions described later.

Further, when a part of the high pressure region 560 has a color different from that of the low pressure region 550, the high pressure region 560 has a different color portion 566 (arrangement portion of the stretchable film 565) that is a color different from the low pressure region 550, and A non-different color portion 567 other than the different color portion 566. In this case, in at least one of the front belt portion 521 and the rear belt portion 522, it is preferable that the ratio of the different color portion 566 per unit area is higher in the central portion in the left-right direction than in the end portion.

For example, as shown in FIG. 19, in the front belt portion 521, a part of the first high pressure region 561 and the second high pressure region 562 overlap each other in the center portion in the left-right direction, and the end portion in the left-right direction Then, the first high pressure region 561 and the second high pressure region 562 are separated from each other. Therefore, the ratio of the different color portion 566 per unit area is high in the central portion in the left-right direction. The same applies to the rear belt portion 522.

The center part in the left-right direction of the front belt part 521 and the rear belt part 522 is more noticeable to the user than the end part, and by increasing the ratio of the different color part 566 per unit area in the center part, the high pressure The area 560 is easily recognized by the user. However, the present invention is not limited to the above, and for example, the ratio of the different color portion 566 per unit area may be constant, or both end portions in the left-right direction may be higher than the central portion.

Further, as shown in FIGS. 19 and 20, the length L51 in the vertical direction from the upper end 560a of the high pressure region 560 located at the center in the left-right direction of the front belt portion 521 to the waistline opening 500a is the rear belt portion. It may be different from the length L52 in the vertical direction from the upper end 560a of the high pressure region 560 located at the center in the horizontal direction of 522 to the waistline opening 500a.

By doing so, the user can make a front / rear determination of the diaper 500 based on the position of the visible high pressure region 560 in the vertical direction. Therefore, the diaper 500 is correctly attached in the front-rear direction.

Note that at least the pair of locking portions 524 (the left and right sides of the belt portion) on the relationship between the ratio of the different color portion 566 per unit area and the length (L51, L52) from the high pressure region 560 to the waistline opening 500a. (Both end portions in the direction) and the center of the pair of locking portions 524 (the center portion in the left-right direction of the belt portion). Preferably, it is good to hold | maintain in the both ends of 1/3 length between a pair of latching | locking parts 524 from each pair of latching | locking part 524, and the center part between them.

Also, it is better that the high pressure region 560 has a higher contraction rate than the low pressure region 550. The contraction rate is defined as “a” as the length in the left-right direction when the high-pressure region 560 and the low-pressure region 550 are fully extended in the left-right direction, and in the left-right direction of the natural state of the high-pressure region 560 and the low-pressure region 550. When the length is b, this is a value calculated by the following equation “(ab) / a × 100 (%)”. By doing so, when the high pressure region 560 is colored, the color of the high pressure region 560 becomes relatively dark in the natural state of the diaper 500. Therefore, the high pressure region 560 is easily recognized by the user.

Further, the light transmittance of a sheet other than the sheet colored in the high pressure region 560 (here, the stretchable film 565) may be relatively high (for example, 50% or more). In addition, the amount of white pigment (such as titanium oxide) contained in a sheet other than the colored sheet may be reduced (for example, less than 10%). By doing so, the colored sheet is easily seen through from the non-skin side and the skin side of the front belt portion 521 and the rear belt portion 522, and the high pressure region 560 is easily recognized by the user.

Next, the shapes of the first to fourth high pressure regions 561 to 564 will be specifically described.
As shown in FIG. 19, the first high pressure region 561 of the front belt portion 521 is continuously disposed in the left-right direction across the pair of locking portions 524, and the left and right sides of the first high pressure region 561 are left and right. The central part of the direction is located on the lower side compared to both end parts. More specifically, the first high pressure region 561 is gradually inclined downward from both ends in the left-right direction toward the center.

Therefore, it is possible to prevent the wearer's abdomen from being excessively tightened by the first high pressure region 561. Moreover, since the low pressure area | region 550 can contact | adhere moderately to a wearer's abdomen, the wearing comfort of the diaper 500 can be improved. Moreover, a wearer's upper anterior iliac spine vicinity can be clamped in the both ends of the left-right direction of the 1st high pressure area | region 561, and the position shift of the diaper 500 at the time of wear can be suppressed.

Further, the second high pressure region 562 of the front belt portion 521 is also continuously arranged in the left-right direction across the pair of locking portions 524, and both end portions in the left-right direction of the second high pressure region 562 are The first high pressure region 561 is positioned below the first high pressure region 561, and at least part of the central portion in the left-right direction of the second high pressure region 562 overlaps the first high pressure region 561.

That is, the central portion in the left-right direction of the second high pressure region 562 is located relatively on the lower side, like the first high pressure region 561. Therefore, excessive tightening of the wearer's abdomen by the second high pressure region 562 can be prevented. Moreover, it can clamp | tighten so that a wearer's upper anterior iliac spine may be supported from the bottom in the both ends of the left-right direction of the 2nd high pressure area | region 562, and the position shift of the diaper 500 at the time of wear can be suppressed.

On the other hand, as shown in FIG. 20, the third high pressure region 563 of the rear belt portion 522 is continuously arranged in the left-right direction across the pair of locking portions 524, and the third high pressure region The center part of the left-right direction of 563 is located above the both ends. More specifically, the third high pressure region 563 is gradually inclined upward from both left and right end portions toward the central portion.

Therefore, it is possible to prevent the center portion of the buttocks where the wearer's movement is large from being excessively tightened by the third high pressure region 563. Moreover, since the low pressure area | region 550 can contact | adhere moderately to a wearer's buttocks center part, the wearing comfort of the diaper 500 can be improved. Further, if the high pressure region 560 is located at the center of the buttock, the high pressure region 560 may be displaced due to movement or swelling of the center of the buttock, and as a result, the diaper 500 may be displaced. On the other hand, since the 3rd high pressure area | region 563 is arrange | positioned so that a collar part center part may be partially enclosed from an upper side, it is hard to position-shift. Similarly to the second high pressure region 562, the left and right ends of the third high pressure region 563 can be tightened so as to support the wearer's upper anterior iliac spine from below. The positional deviation of 500 can be suppressed.

Further, the fourth high pressure region 564 of the rear belt portion 522 is also continuously arranged in the left-right direction across the pair of locking portions 524, and both end portions in the left-right direction of the fourth high pressure region 564 are arranged. Is located above the third high pressure region 563, and at least part of the central portion in the left-right direction of the fourth high pressure region 564 overlaps the third high pressure region 563.

That is, the central portion in the left-right direction of the fourth high pressure region 564 is positioned relatively on the upper side, like the third high pressure region 563. Therefore, it can prevent that a wearer's buttocks center part is tightened too much by the 4th high pressure field 564. Moreover, since the both ends of the left-right direction of the 4th high pressure area | region 564 are located relatively upper side, like the 1st high pressure area | region 561, a wearer's upper anterior iliac spine vicinity can be clamped, The position shift of the diaper 500 at the time of wear can be suppressed.

As for the positional relationship between the first to fourth high pressure regions 561 to 564, at least the pair of locking portions 524 (both ends in the left-right direction of the high pressure region) and the center of the pair of locking portions 524 (high It is preferable that this is established at the center in the left-right direction of the pressure region. Preferably, it is good to hold | maintain in the both ends of 1/3 length between a pair of latching | locking parts 524 from each pair of latching | locking part 524, and the center part between them.

Moreover, in the latching | locking part 524, it is good that the one part or all position of the up-down direction of the 1st high pressure area | region 561 and the 4th high pressure area | region 564 is aligning. Similarly, in the locking portion 524, it is preferable that the second high pressure region 562 and the third high pressure region 563 are partially or entirely aligned in the vertical direction. By doing so, an annular high pressure region 560 is formed. Therefore, the diaper 500 fits around the wearer's waist and the displacement of the diaper 500 can be suppressed.

The lower end of the fourth high pressure region 564 is disposed above the lower end of the first high pressure region 561 at the center in the left-right direction of the front belt portion 521 and the rear belt portion 522, and the third high pressure The lower end of the region 563 is disposed above the lower end of the second high pressure region 562. Thereby, a lower abdominal part can be tightened diagonally upward and intra-abdominal pressure can be raised. Therefore, the function of muscles around the pelvis (such as abdominal muscles) can be assisted and the pelvis can be stabilized.

Further, in the rear belt portion 522, the length in the vertical direction from the upper end of the fourth high pressure region 564 to the lower end of the third high pressure region 563 is longer at both ends in the left-right direction than at the center. And the lower end of the 3rd high pressure field 563 is located below. Further, the lower end of the third high pressure region 563 is gradually inclined downward from the center portion in the left-right direction of the rear belt portion 522 toward both ends. That is, the third and fourth high pressure regions 563 and 564 are arranged in accordance with the shape of the middle ankle. Therefore, when the diaper 500 is worn, the third and fourth high pressure regions 563 and 564 can tighten the wearer's middle gluteal muscle, and can assist the movement of the gluteal muscle. As a result, the pelvis during movement such as walking is stabilized and can support the wearer's movement (walking).

And in the diaper 500 of this embodiment, the high pressure area | region 560 match | combined with the wearer's body shape as mentioned above is made into a color different from the low pressure area | region 550, and can be visually recognized. Therefore, the user can wear the diaper 500 at the position of the wearer that is easy to move and comfortable to wear and is not easily displaced. Therefore, the effect of the high pressure region 560 can be obtained more reliably.

However, the high pressure regions 560 shown in FIGS. 19 and 20 are examples, and the number, shape, arrangement, and the like of the high pressure regions 560 are not particularly limited. For example, the diaper 500 may have any one or more of the first to fourth high pressure regions 561 to 564. Further, only one of the front belt portion 521 and the rear belt portion 522 may have the high pressure region 560, and the other may not have the high pressure region 560.

As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof.

1 pants-type disposable diapers,
10 absorbent body, 11 absorbent core,
12 top sheet, 13 back sheet, 14 solid gather part,
20 exterior body,
21 ventral exterior body (front belt part), 21s base region,
22 Back exterior body (rear belt part),
213,223 skin side sheet (skin side nonwoven fabric),
214,224 non-skin side sheet (non-skin side non-woven fabric),
215,225 Stretchable nonwoven fabric (stretchable member),
23 inseam exterior body, 24 end joint region,
26 waist elastic member, 26s stretchable region,
27 Leg elastic member,
30 elastic film, 30s high pressure region,
31s first high pressure region, 32s second high pressure region,
33s low pressure region, 34 vents,
40 welds, 50 holes (vents),
300 diapers (pants-type disposable diapers),
310 absorbent body, 311 absorbent core,
312 Top sheet, 313 Back sheet,
320 exterior body, 321 front belt part, 322 rear belt part,
3213, 3223 skin side sheet, 3214, 3224 non-skin side sheet,
3215, 3225 elastic nonwoven fabric (front elastic member),
323 crotch, 324 locking part,
326 Thread rubber for waist, 327 Thread rubber for legs
330 Low pressure region, 331 Rear low pressure region (low pressure region),
332 front low pressure region,
340 high pressure region, 341 rear high pressure region (high pressure region),
342 front high pressure region,
343 stretchable film (rear stretchable member, front stretchable member),
350 joints, 360 middle ankle, 361 greater ankle,
500 diapers (pants-type disposable diapers),
500a waist opening, 500b leg opening,
510 absorbent body, 511 absorbent core,
512 top sheet, 513 back sheet,
520 exterior body,
521 Front belt part (belt part), 522 Rear belt part (belt part),
5213, 5223 skin side sheet, 5214, 5224 non-skin side sheet,
5215, 5225 elastic nonwoven fabric,
523 crotch part, 524 locking part, 527 rubber thread for leg rotation,
530 joint,
540 waist stretchable region (stretchable region), 541 rubber thread,
550 low pressure region,
560 high pressure region,
561 first high pressure region, 562 second high pressure region,
563 third high pressure region, 564 fourth high pressure region,
565 stretchable film (stretchable member),
566 Different color part, 567 Non-different color part

Claims

Having a vertical direction, a horizontal direction and a front-rear direction intersecting each other;
A front belt portion, a rear belt portion, and an absorbent main body having an absorbent core;
A pants-type disposable diaper in which a waistline opening is formed at the upper end by the front belt portion and the rear belt portion,
The front belt portion and the rear belt portion are
A skin-side nonwoven fabric positioned closest to the skin, a non-skin-side nonwoven fabric positioned closest to the non-skin side, and a stretchable member that expands and contracts in the left-right direction, and
A stretchable region along an edge of the waistline opening;
A base region adjacent to the stretchable region at the center in the left-right direction of the front belt portion from below;
A high pressure region provided below the stretchable region,
The force for extending the high pressure region of unit width in the left-right direction by a unit length is greater than the force for extending the base region of unit width in the left-right direction,
The high pressure region is
It is provided in a circumferential shape across the front belt portion and the rear belt portion,
Having a stretchable film between the skin-side nonwoven fabric and the non-skin-side nonwoven fabric, and
Compared to the part where the stretchable film is located, it has a breathable part with good ventilation,
A pants-type disposable diaper characterized in that at least one of the front belt portion and the rear belt portion does not overlap the absorbent core in the front-rear direction.
The pants-type disposable diaper according to claim 1,
The pants-type disposable diaper, wherein the stretchable member is a sheet-like member having air permeability.
The pants-type disposable diaper according to claim 2,
The stretchable member is a stretchable nonwoven fabric,
The said stretchable nonwoven fabric is between the said skin side nonwoven fabric and the said non-skin side nonwoven fabric, and is arrange | positioned on the skin side rather than the said stretchable film, The underpants type disposable diaper characterized by the above-mentioned.
The pants-type disposable diaper according to claim 2 or 3,
The stretchable member is a stretchable nonwoven fabric,
In the stretchable region, a plurality of thread-like elastic materials that stretch in the left-right direction are arranged at intervals in the up-down direction,
The vertical length from the upper end of the high pressure region to the upper end of the front belt portion at the center in the left-right direction of the front belt portion is longer than the vertical length of the high pressure region. Pants-type disposable diaper characterized by.
The pants-type disposable diaper according to any one of claims 1 to 4,
In the high pressure region, the plurality of stretchable films that are long in the left-right direction are arranged at intervals in the up-down direction,
A pants-type disposable diaper, wherein a portion between the stretchable films arranged in the vertical direction is the ventilation portion.
The pants-type disposable diaper according to claim 5,
The underpants-type disposable diaper characterized in that, in the high pressure region, the area of the portion where the stretchable film is located is larger than the area of the ventilation portion between the stretchable films arranged in the vertical direction.
The pants-type disposable diaper according to claim 5 or 6,
In the left and right side portions of the front belt portion and the rear belt portion, the value obtained by dividing the area of the ventilation portion by the area of the high pressure region is larger than the central portion in the left and right direction. A pants-type disposable diaper.
The pants-type disposable diaper according to any one of claims 5 to 7,
The stretchable disposable diaper, wherein the stretchable film does not have an opening penetrating the stretchable film.
The pants-type disposable diaper according to any one of claims 1 to 7,
The stretchable film has an opening that penetrates the stretchable film,
The pants-type disposable diaper, wherein the opening is the ventilation portion.
A pants-type disposable diaper according to any one of claims 1 to 9,
The pants-type disposable diaper, wherein the skin-side nonwoven fabric, the non-skin-side nonwoven fabric, the stretchable member, and the stretchable film are welded in the front-rear direction by the same welding pattern.
The pants-type disposable diaper according to claim 10,
The welding pattern is a pattern in which a plurality of welding portions are scattered,
A pant-type disposable diaper characterized in that, in a state where the pant-type disposable diaper is extended, the area of the ventilation part is larger than the area of the weld part located in the high pressure region.
It has an up-down direction, a left-right direction, and a front-rear direction intersecting each other,
A pants-type disposable diaper in which the left and right side portions of the front belt portion and the left and right side portions of the rear belt portion are locked in a pair of locking portions,
The rear belt portion has a low pressure region and a high pressure region,
The low pressure region and the high pressure region have elasticity in the left-right direction,
The force for extending the high pressure region of the unit width in the vertical direction by a unit length in the left-right direction is the force for extending the low pressure region of the unit width in the left-right direction by the unit length. Bigger than
The high pressure region is continuously arranged in the left-right direction across the pair of locking portions,
The both ends of the left and right direction of the high pressure region are longer in the vertical direction of the high pressure region than the center portion, and the lower end of the high pressure region is located below,
The pants-type disposable diaper, wherein the low pressure region is disposed adjacent to the lower side of the high pressure region at a central portion in the left-right direction of the rear belt portion.
A pants-type disposable diaper according to claim 12,
A pants-type disposable diaper, wherein a lower end of the high pressure region is inclined downward from a central portion in the left-right direction of the high pressure region toward both ends.
The pants-type disposable diaper according to claim 12 or 13,
Having an absorbent core,
The high pressure region is arranged in the front-back direction without overlapping the rear side portion of the absorbent core,
The pants-type disposable diaper, wherein the low pressure region is disposed at least between a lower end of the high pressure region and an upper end of a rear side portion of the absorbent core.
The pants-type disposable diaper according to any one of claims 12 to 14,
The front belt portion has a front elastic member that expands and contracts in the left-right direction,
The front elastic member is continuously arranged in the left-right direction across the pair of locking portions,
The pants-type disposable diaper, wherein the high pressure region is connected to the front elastic member at the locking portion.
The pants-type disposable diaper according to claim 15,
The front belt portion has a front low pressure region having elasticity in the left-right direction, and a front high pressure region having the front elastic member,
The force for extending the front high pressure region of the unit width in the up-down direction by the unit length in the left-right direction is to extend the front low pressure region of the unit width in the left-right direction by the unit length. Greater than the power of
The said high pressure area | region is connected with the said front high pressure area | region in the said latching | locking part, The pants type disposable diaper characterized by the above-mentioned.
The pants-type disposable diaper according to claim 16,
The front high pressure region has a plurality of the front elastic members spaced in the vertical direction,
The high pressure region has a plurality of rear elastic members that expand and contract in the left-right direction with a space in the vertical direction,
In the locking portion, the uppermost front elastic member and the uppermost rear elastic member are connected to each other, and the lowermost front elastic member and the lowermost rear side are connected. A pants-type disposable diaper characterized by being connected to an elastic member.
The pants-type disposable diaper according to claim 16 or 17,
The both ends in the left-right direction of the front high pressure region are longer in the vertical direction of the front high pressure region than the center portion, and the upper end of the front high pressure region is located above. A pants-type disposable diaper characterized by
The pants-type disposable diaper according to claim 18,
The pants-type disposable diaper, wherein the front low pressure region is arranged adjacent to the upper side of the front high pressure region at a central portion in the left-right direction of the front belt portion.
A pants-type disposable diaper according to any one of claims 16 to 19,
Having an absorbent core,
The pants-type disposable diaper, wherein the front high pressure region is arranged in the front-rear direction without overlapping the front side portion of the absorbent core.
A pants-type disposable diaper according to any one of claims 12 to 20,
The high pressure region has a plurality of rear elastic members that expand and contract in the left-right direction with a space in the vertical direction,
A pants-type disposable diaper characterized in that the distance between the rear elastic members adjacent to each other in the up-down direction is wider in the left and right ends of the high pressure region than in the center.
The pants-type disposable diaper according to any one of claims 12 to 21,
The high pressure region has a rear elastic member that expands and contracts in the left-right direction,
The pants-type disposable diaper, wherein the rear elastic member is a sheet-like member.
The pants-type disposable diaper according to claim 22,
In the high pressure region, a stretchable nonwoven fabric and a stretchable film are disposed between the skin side sheet and the non-skin side sheet,
In the low pressure region, the stretchable nonwoven fabric is disposed between the skin side sheet and the non-skin side sheet.
The pants-type disposable diaper according to any one of claims 12 to 23,
A pants-type disposable diaper, wherein an elastic member is disposed along a pair of leg openings.
It has an up-down direction, a left-right direction, and a front-rear direction intersecting each other,
A pants-type disposable diaper having a belt part and an absorbent main body,
The belt portion has a low pressure region and a high pressure region below the stretchable region along the edge of the waistline opening,
The low pressure region and the high pressure region are adjacent and have elasticity in the left-right direction,
The force for extending the high pressure region of the unit width in the vertical direction by a unit length in the left-right direction is the force for extending the low pressure region of the unit width in the left-right direction by the unit length. Bigger than
A pants-type disposable diaper, wherein when the belt portion is viewed from at least one of the non-skin side and the skin side, at least a part of the high pressure region has a color different from that of the low pressure region.
A pants-type disposable diaper according to claim 25,
The pants characterized in that when the belt portion is viewed from at least one of the non-skin side and the skin side, the contour portion of the high pressure region in the vertical direction is a color different from the low pressure region. Type disposable diaper.
The pants-type disposable diaper according to claim 25 or 26,
When the belt portion is viewed from at least one of the non-skin side and the skin side,
In the high pressure region and the low pressure region, when the difference in a * value of the L * a * b * color system is Δa * and the difference in b * value is Δb *, the color difference ΔE * is calculated by the following equation:
ΔE * = [(Δa *) 2+ (Δb *) 2] 1/2
The pants-type disposable diaper, wherein the color difference ΔE * is 1.45 or more.
The pants-type disposable diaper according to claim 27,
When the belt portion is viewed from the non-skin side,
The pants-type disposable diaper, wherein the color difference ΔE * is 1.45 or more.
A pants-type disposable diaper according to any one of claims 25 to 28,
The high pressure region has an elastic member that expands and contracts in the left-right direction,
The pants-type disposable diaper, wherein the elastic member is colored in a different color from the low pressure region.
A pants-type disposable diaper according to claim 29,
In the high pressure region, a plurality of materials are laminated in the thickness direction of the belt portion,
The stretchable disposable diaper, wherein the stretchable member is disposed closer to the non-skin side.
A pants-type disposable diaper according to claim 29 or 30,
The stretchable disposable diaper, wherein the stretchable member is a sheet-like stretchable member.
A pants-type disposable diaper according to any one of claims 29 to 31,
In the high pressure region, a plurality of the elastic members are arranged at intervals in the vertical direction.
A pants-type disposable diaper according to any one of claims 29 to 32,
The stretchable member is intermittently joined by a plurality of joints with the sheet disposed on the non-skin side than the stretchable member,
The interval between the joints adjacent in the vertical direction is smaller than the length of the elastic member in the vertical direction, and is adjacent in the left-right direction than the length of the elastic member in the horizontal direction. A pants-type disposable diaper characterized in that the interval between the joints is smaller.
A pants-type disposable diaper according to any one of claims 25 to 33,
The high pressure region has a different color portion that is a different color from the low pressure region, and a non-different color portion other than the different color portion,
A pants-type disposable diaper characterized in that a ratio of the different-colored portion per unit area is higher in the central portion of the belt portion in the left-right direction than in an end portion.
A pants-type disposable diaper according to any one of claims 25 to 34,
The belt portion has a front belt portion and a rear belt portion,
The length in the up-down direction from the upper end of the high pressure region located in the center portion in the left-right direction of the front belt portion to the waistline opening is located in the center portion in the left-right direction of the rear belt portion. A pants-type disposable diaper characterized by being different from the length in the vertical direction from the upper end of the high pressure region to the waistline opening.
A pants-type disposable diaper according to any one of claims 25 to 35,
The belt portion has a front belt portion and a rear belt portion,
The left and right side portions of the front belt portion and the left and right side portions of the rear belt portion are locked in a pair of locking portions,
The high pressure region has a first high pressure region in the front belt portion,
The first high pressure region is continuously arranged in the left-right direction across the pair of locking portions,
The center part of the said left-right direction of the said 1st high pressure area | region is located below compared with both ends, The underpants type disposable diaper characterized by the above-mentioned.
The pants-type disposable diaper according to claim 36,
The high pressure region has a second high pressure region in the front belt portion,
The second high pressure region is continuously arranged in the left-right direction across the pair of locking portions,
Both ends in the left-right direction of the second high pressure region are located below the first high pressure region,
A pants-type disposable diaper, wherein at least a part of the central portion in the left-right direction of the second high pressure region overlaps the first high pressure region.
A pants-type disposable diaper according to any one of claims 25 to 37,
The belt portion has a front belt portion and a rear belt portion,
The left and right side portions of the front belt portion and the left and right side portions of the rear belt portion are locked in a pair of locking portions,
The high pressure region has a third high pressure region in the rear belt portion,
The third high pressure region is continuously arranged in the left-right direction across the pair of locking portions,
The center part of the said left-right direction of the said 3rd high pressure area | region is located on the upper side compared with both ends, The underpants type disposable diaper characterized by the above-mentioned.
A pants-type disposable diaper according to claim 38,
The high pressure region has a fourth high pressure region in the rear belt portion,
The fourth high pressure region is continuously arranged in the left-right direction across the pair of locking portions,
The left and right ends of the fourth high pressure region are located above the third high pressure region,
A pants-type disposable diaper characterized in that at least a part of the central portion in the left-right direction of the fourth high pressure region overlaps with the third high pressure region.