JP2020092895A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of suppressing leakage.SOLUTION: An absorbent article comprises an absorber and a liquid permeable sheet member covering a skin surface side of the absorber. The sheet member includes: an upper side sheet disposed on a skin surface side; and a lower side sheet superposed on the upper side sheet to be disposed on an absorber side. The sheet member comprises: a valve part that is defined by a curved cut penetrating the upper side sheet in the thickness direction and is connected to the upper side sheet via an uncut remnant connecting both ends of the cut; and a hole that is formed by the valve part being joined to the lower side sheet and makes the skin surface side of the upper side sheet communicate with a space formed between the upper side sheet and the lower side sheet.SELECTED DRAWING: Figure 6

Description

The present invention relates to absorbent articles such as disposable diapers, pads and sanitary napkins.

BACKGROUND ART Conventionally, an absorbent article is provided with an absorbent body extending in the longitudinal direction connecting the abdomen side and the back side of a wearer, as disclosed in Patent Document 1, for example. By this absorber, excreted liquid such as urine and menstrual blood is absorbed. In the absorbent article, by disposing this absorbent body between the liquid-permeable sheet and the liquid-impermeable sheet, the urine excreted in the liquid-permeable sheet is absorbed by the absorbent body and is absorbed by the absorbent body. Prevents leakage of absorbed urine with a liquid impermeable sheet.

International Publication No. 2016/114209

A nonwoven fabric is used for the liquid-permeable sheet, for example. Since a non-woven fabric can realize a soft touch, it is suitable as a material for a sheet that comes into contact with the wearer's skin. In addition to urine and menstrual blood, for example, watery feces are excreted from the wearer. Aqueous stool is a mixture of solid and liquid and has fluidity. In an absorbent article, if fluid watery feces cannot be absorbed by the absorbent body and fluid watery feces are present on the liquid-permeable sheet, the watery feces may leak to the outside. is there.

Then, this invention aims at providing the absorbent article which can suppress a leak.

In order to solve the above problems, in the present invention, the liquid-permeable sheet member that covers the skin surface side of the absorber is arranged on the absorber side by being overlaid on the upper sheet and the upper sheet arranged on the skin surface side. And a lower sheet. A valve portion that is defined by a curved cut that penetrates the upper sheet in the thickness direction and that is connected to both ends of the cut and that is connected to the upper sheet is joined to the lower sheet.

Specifically, the present invention is an absorbent article, comprising an absorbent body and a liquid-permeable sheet member that covers the skin surface side of the absorbent body, and the sheet member is disposed on the skin surface side. The upper sheet and the lower sheet which is placed on the absorber side and overlapped with the upper sheet, and is defined by a curved cut that penetrates the upper sheet in the thickness direction. A valve portion that is connected to the upper sheet by a cut portion that connects both ends, and is formed by joining the valve portion to the lower sheet, and the skin surface side of the upper sheet, the upper sheet, and the lower side. A hole that communicates with a space formed between the sheets is provided.

In the absorbent article, a front body region that covers the abdomen of the wearer, a rear body region that covers the back of the wearer, and a crotch region that is located between the front body region and the rear body region and covers the inseam of the wearer. The seat member is disposed across the front body region and the back body region, and the valve portion is located in the crotch region of the upper seat and is contacted by a wearer's anus. A plurality of regions are formed in the first region on the front body region side from the contact position and on the second region on the rear body region side from the anal contact position in the upper sheet, and in the first region. The valve portion is formed so that the uncut portion faces toward the rear body region side, and the valve portion in the second region is formed so that the uncut portion faces toward the front body region side. Good.

In the absorbent article, the absorbent article is arranged on the upper sheet so as to expand and contract around the first region and the second region in a state of extending in a direction connecting the front body region and the back body region. An elastic member may be provided, and the upper sheet may contract toward the back body region in the first region and contract toward the front body region in the second region by contraction of the elastic member. ..

In the absorbent article, the lower side is expanded and contracted around a position corresponding to the first region and the second region in a state of being extended in a direction connecting the front body region and the back body region. The lower sheet includes an elastic member arranged in a seat, and the lower sheet contracts toward the rear body region in a region corresponding to the first region by contracting the elastic member, and corresponds to the second region. The region may contract in the direction of the front body region.

In the absorbent article, the cut may be substantially C-shaped.

According to the present invention described above, leakage can be suppressed.

FIG. 1 is a perspective view of a pants-type disposable diaper according to an embodiment. FIG. 2 is an exploded perspective view of the diaper according to the embodiment. FIG. 3 is a diagram schematically showing a developed and expanded state of the diaper according to the embodiment. FIG. 4 is a diagram showing the relationship between the distance between the rubber threads and the ventilation path appearing in the waist gather. FIG. 5: is a figure which shows the center sheet of the diaper which concerns on embodiment. Drawing 6 is a figure showing the valve part formed in the center sheet of the diaper concerning an embodiment. FIG. 7: is a figure which shows the center sheet of the diaper which concerns on embodiment. FIG. 8: is a figure which shows the center sheet of the diaper which concerns on embodiment. FIG. 9: is a figure which shows the lower side sheet|seat of the center sheet of the diaper which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described. The embodiment described below is an example of the embodiment of the present invention, and the technical scope of the present invention is not limited to the following modes.

<Embodiment>
FIG. 1 is a perspective view of a pants-type disposable diaper (hereinafter, simply referred to as “diaper”) according to an embodiment. The term regarding the direction used in the present application means a direction that corresponds to the front, rear, left and right of the wearer when the diaper 1 is worn by the wearer. For example, the term “left-right direction” as used in the present application means a direction that matches the left-right direction of the wearer of the diaper 1 when worn.

In this embodiment, as an example of an absorbent article, a pants-type disposable diaper having a tubular structure having an opening into which the wearer's abdominal circumference is inserted, and a pair of left and right openings through which the wearer's left lower leg and right lower leg are inserted. However, the “absorbent article” referred to in the present application is not limited to pants-type disposable diapers. The "absorbent article" referred to in the present application includes, for example, a tape fixed near one end of a sheet-shaped member that covers the crotch (pubic part) of a wearer from the front body to the back body. It includes various forms of absorbent articles that can wrap the abdominal girth and inseam, such as a tape-type disposable diaper having a tubular structure formed by being attached near the ends.

The diaper 1 includes a crotch region 1B that is a region corresponding to a crotch region that covers the wearer's pubic region (inseam) in a worn state, and a region that corresponds to the front body around the waist of the wearer and that is abdominal side of the wearer It has a front body region 1F for covering and a rear body region 1R for covering the back side of the wearer, which is a region corresponding to the back body around the waist of the wearer. Here, the front body region 1F is located on the front side of the crotch region 1B, and the back body region 1R is located on the rear side of the crotch region 1B. Since the diaper 1 in the present embodiment is a pants-type disposable diaper, the left edge of the front body region 1F and the left edge of the rear body region 1R are joined to each other, and the right edge and the rear body region of the front body region 1F are joined together. The right edges of region 1R are joined together. Therefore, in the diaper 1, the torso opening 2T is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R. Further, in the diaper 1, a left lower limb opening 2L is formed on the left side portion of the crotch region 1B that is not joined, and a right lower limb opening 2R is formed on the right side portion of the crotch region 1B. Then, in the diaper 1, the left lower limb of the wearer is inserted into the left lower limb opening 2L, the right lower limb of the wearer is inserted into the right lower limb opening 2R, and the trunk of the wearer enters the torso opening 2T. When worn, the front body region 1F is arranged on the wearer's abdomen side, the back body region 1R is arranged on the wearer's back side, and the left lower limb opening 2L and the right lower limb opening 2R are formed on the wearer's thigh. It is fixed to the wearer's body while surrounding the part. Since the diaper 1 is fixed to the wearer's body in such a form, the wearer can walk while wearing the diaper 1.

In the diaper 1, an absorber capable of absorbing and holding a liquid is arranged mainly in the vicinity of the crotch region 1B. In addition, the diaper 1 has a left lower limb opening portion surrounding the thigh of the left lower limb of the wearer in order to suppress formation of a gap serving as a liquid outflow path between the diaper 1 and the wearer's skin. A solid gather 3BL is provided in 2L, a solid gather 3BR is provided in the right lower limb opening 2R surrounding the thigh of the wearer's right lower limb, and a waist gather 3R is provided in a region surrounding the wearer's abdominal girth. The three-dimensional gathers 3BL and 3BR and the waist gather 3R are in close contact with the wearer's skin by the elastic force of the rubber thread. Therefore, the excreted liquid discharged from the pubic area of the wearer is absorbed by the absorbent body of the diaper 1 with almost no leakage from the diaper 1.

FIG. 2 is an exploded perspective view of the diaper 1 according to the embodiment. Further, FIG. 3 is a diagram schematically showing a state in which the diaper 1 according to the embodiment is expanded and expanded. FIG. 3(A) schematically shows the internal structure of the diaper 1 in the expanded and expanded state when viewed from the left side. FIG. 3B schematically shows a plan view of the diaper 1 in the unfolded and stretched state.

The diaper 1 has cover sheets 4F and 4R that form an outer surface when worn by a wearer, and a pad cover sheet 6. The cover sheet 4F mainly forms the outer surface of the front body region 1F of the diaper 1. The pad cover sheet 6 mainly forms the outer surface of the crotch region 1B of the diaper 1. The cover sheet 4R mainly forms the outer surface of the rear body region 1R of the diaper 1. The cover sheets 4F, 4R and the pad cover sheet 6 are provided to reinforce the outer surface of the diaper 1 and to improve the touch. For example, in order to suppress excrement leakage, a liquid impermeable thermoplastic resin is used. Can be used as the material. Here, examples of the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP). In addition, the liquid-impermeable sheet may be provided with a large number of fine holes of about 0.1 to several μm so that the liquid-impermeable and moisture-permeable properties are exhibited.

The diaper 1 includes an inner cover sheet 5F laminated on the wearer side surface of the cover sheet 4F (side surface of the wearer's skin), and an inner cover sheet 5R laminated on the wearer side surface of the cover sheet 4F. Have. The inner cover sheet 5F is a sheet-shaped member having a shape that matches a portion of the cover sheet 4F closer to the crotch region 1B than a folding line 4F6 described later. Similarly to the inner cover sheet 5F, the inner cover sheet 5R is also a sheet-shaped member having a shape that matches a portion of the cover sheet 4R on the crotch region 1B side of a folding line 4R6 described later.

Further, the diaper 1 has a back sheet 7, an absorbent body 8 and a center sheet 9 which are sequentially stacked on the wearer side surface of the pad cover sheet 6. The pad cover sheet 6 is a substantially rectangular parallelepiped sheet having a length that extends from the front body of the wearer to the back body via the inseam in the longitudinal direction and has a predetermined lateral width in the width direction orthogonal to the longitudinal direction. is there. Further, the back sheet 7, the absorber 8 and the center sheet 9 are all sheet-like members having a substantially rectangular appearance like the pad cover sheet 6, and the longitudinal direction thereof coincides with the longitudinal direction of the pad cover sheet 6. In this state, the pad cover sheets 6 are sequentially laminated. The back sheet 7 is a sheet made of a liquid impermeable thermoplastic resin as a material in order to suppress excrement leakage. The center sheet 9 is a sheet-shaped member that is arranged on the skin side of the wearer so as to cover the water absorbing surface of the absorber 8. The center sheet 9 is partially or wholly liquid-permeable. Therefore, when the diaper 1 is worn, the liquid excreted from the wearer penetrates the absorber 8 through the center sheet 9 that can come into contact with the wearer's skin and is absorbed there. Examples of the liquid-permeable sheet used for the center sheet 9 include woven cloth, non-woven cloth, and porous film. In the embodiment, a nonwoven fabric is used for the center sheet 9. Further, the center sheet 9 may have hydrophilicity.

The absorbent body 8 has a structure in which short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers obtained by subjecting synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate to hydrophilic treatment are treated with water. It has a structure in which a granular absorbent resin such as a hydrophilic superabsorbent polymer having a cross-linking structure capable of absorbing and holding is retained. Therefore, when the absorbent body 8 absorbs the liquid excreted from the wearer, the absorbent body 8 swells the absorbent resin held in the gaps in the short fibers to hold the liquid in the short fibers. The absorber 8 may have a single-layer structure composed of one mat or a laminated structure in which a plurality of mats are stacked. Moreover, the absorber 8 can take an appropriate shape according to the purpose. Examples of the shape of the absorber 8 include a rectangular shape, an hourglass shape in which the vicinity of the central portion is constricted, and various other shapes.

The back sheet 7, the absorber 8 and the center sheet 9 all extend from the front body region 1F to the back body region 1R. Therefore, when the wearer's pubic area (inseam) is covered with the pad cover sheet 6 in which the back sheet 7, the absorber 8 and the center sheet 9 are laminated, Both ends are located on the wearer's ventral side and dorsal side. That is, the wearer's genital area is in a state of being covered with the absorber 8 from the wearer's ventral side to back side. Therefore, even if the wearer discharges the liquid out of the body in any of the posture in which the belly faces down and the posture in which the back faces down, the discharged liquid contacts the absorber 8 through the center sheet 9. Will be done.

Further, the diaper 1 has elongated strip-shaped side sheets 10L and 10R for forming the above-mentioned three-dimensional gathers 3BL and 3BR. The side seats 10L and 10R are provided on the long sides of the center seat 9. Thread rubbers 10L1 and 10R1 are adhered to the side sheets 10L and 10R along the longitudinal direction. Therefore, in the side sheets 10L and 10R, the edge 4F7 of the cover sheet 4F, which is the left edge of the front body region 1F, and the edge 4R7 of the cover sheet 4R, which is the left edge of the rear body region 1R, are joined to each other, and As shown in FIG. 1, the edge 4F8 of the cover sheet 4F, which is the right edge of the front body region 1F, and the edge 4R8 of the cover sheet 4R, which is the right edge of the back body region 1R, are joined together. When the diaper 1 in such a completed state is obtained, it is pulled in the longitudinal direction by the contracting force of the rubber thread 10L1, 10R1 and rises from the center sheet 9 along the folding lines 10L2, 10R2. As a result, three-dimensional gathers 3BL and 3BR that prevent the liquid from flowing out from the left lower limb opening 2L and the right lower limb opening 2R are formed. The joining method of the edge 4F7 in the cover sheet 4F, the edge 4R7 in the cover sheet 4R, the edge 4F8 in the cover sheet 4F, and the edge 4R8 in the cover sheet 4R is not particularly limited, and examples thereof include heat sealing, high frequency sealing, and ultrasonic sealing. Can be done by

In addition, the diaper 1 includes a ventilation path forming sheet 11F laminated on the wearer side surface of the cover sheet 4F with the pad cover sheet 6, the back sheet 7, the absorber 8, the center sheet 9, and the side sheets 10L and 10R interposed therebetween. , The ventilation path forming sheet 11R laminated on the wearer side surface of the cover sheet 4R. The ventilation path forming sheet 11F is superposed on the cover sheet 4F at one end side in the longitudinal direction of the center sheet 9. Further, the ventilation path forming sheet 11R is overlapped with the cover sheet 4R at the other end side in the longitudinal direction of the center sheet 9. It should be noted that in the present application, the state in which the sheets are overlapped is not limited to the form in which the sheets to be overlapped overlap each other in the state of being entirely in contact with each other, and is a concept including a form in which parts of the sheets overlap. For example, the ventilation path forming sheet 11F is overlapped with a part of the pad cover sheet 6 at one end side in the longitudinal direction touching a part of the cover sheet 4F.

In the ventilation path forming sheet 11F, a large number of minute ventilation holes 11F1 for ventilation are arranged in a region extending in the left-right direction along the upper edge of the front body region 1F. Similarly to the air passage forming sheet 11F, the air passage forming sheet 11R has a large number of air holes 11R1 arranged therein. Here, the ventilation hole means an opening that connects the space on one surface side of the sheet and the space on the other surface side, and the shape thereof is not particularly limited. Therefore, as the ventilation holes 11F1 and 11R1, for example, openings having a shape such as a circle, an ellipse, a polygon (triangle, quadrangle, etc.) can be applied. The formation of the ventilation holes 11F1, 11R1 in the ventilation path forming sheets 11F, 11R does not mean that the ventilation path forming sheets 11F, 11R are materials having no air permeability, and the ventilation path forming sheets 11F, 11R may be either a breathable material or a non-breathable material. The ventilation path forming sheets 11F and 11R are preferably made of a material having air permeability or liquid permeability, but may be, for example, a non-air permeable material. The size and number of the ventilation holes 11F1 and 11R1 are not particularly limited, but for example, it is preferable that about 5 to 200 holes are formed if the opening area is 0.5 to 10 mm ² .

As described above, the diaper 1 includes the back sheet 7 and the center sheet 9 with the absorbent body 8 sandwiched therebetween, as well as the cover sheets 4F and 4R, the air passage forming sheets 11F and 11R, the pad cover sheet 6, the side sheet 10L, Since 10R is formed by stacking, it can be said to have a laminated body in which a plurality of these sheets are stacked.

Here, as shown in FIG. 3, one end side of the cover sheet 4F is folded back along the folding line 4F6. The above-mentioned waist gather 3R is formed by adhering thread rubbers (thread rubbers) 4F2 and 4F3 to the cover sheet 4F and adhering thread rubbers (thread rubbers) 4R2 and 4R3 to the cover sheet 4R. To be done. The thread rubbers 4F2 and 4F3 adhered to the cover sheet 4F form the thread rubber 4F2 and the thread rubber 4F3 from the side of the fold line 4F6 along the fold line 4F6 which will form the upper edge of the front body region 1F when folded back. They are provided in order. Similarly to the thread rubbers 4F2 and 4F3, the thread rubbers 4R2 and 4R3 bonded to the cover sheet 4R also form the upper edge of the back body region 1R when folded back, along the fold line 4R6. The rubber thread 4R2 and the rubber thread 4R3 are provided in this order from the side. Therefore, the rubber thread 4F2, 4F3 is provided on the cover sheet 4F in a direction in which the waistline direction, which is the stretching direction, is the left-right direction of the diaper 1. Further, the rubber thread 4R2, 4R3 is provided on the cover sheet 4R in such a direction that the longitudinal direction, which is the stretching direction, is the left-right direction of the diaper 1. Therefore, when the edge 4F7 and the edge 4R7 are joined to each other and the edge 4F8 and the edge 4R8 are joined to each other, the thread rubbers 4F2 and 4F3 and the thread rubbers 4R2 and 4R3 circulate along the trunk opening 2T in a substantially annular shape. The elastic member is formed to exert a function of contracting the torso opening 2T in the torso direction. That is, the thread rubbers 4F2, 4F3 and the thread rubbers 4R2, 4R3 exert contractive force to bring the diaper 1 into close contact with the wearer and prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference.

Further, thread rubbers 4F4 and 4F5 are bonded to the cover sheet 4F, and thread rubbers 4R4 and 4R5 are bonded to the cover sheet 4R. The thread rubbers 4F4 and 4F5 are elastic members provided in a region of the cover sheet 4F closer to the crotch region 1B than the thread rubber 4F3. However, unlike the thread rubbers 4F2 and F3 which are adhered from the left end to the right end of the cover sheet 4F without interruption, the thread rubbers 4F4 and 4F5 have a predetermined lateral width at the center portion in the width direction which corresponds to the absorber 8. Only cut. The cover sheet 4F has the thread rubbers 4F4 and 4F5, which are cut in the widthwise central portion corresponding to the absorber 8, so that the lower abdomen of the wearer does not hinder the expansion of the absorber 8 due to water absorption. Gives an appropriate feeling of adhesion to. The cover sheet 4R is the same as the cover sheet 4F, and the rubber thread 4R4, 4R5 in which the widthwise central portion corresponding to the absorber 8 is cut by a predetermined lateral width is adhered to the cover sheet 4R. , Gives a proper feeling of adhesion to the lower abdomen of the wearer.

By the way, as can be seen from FIG. 3, the rubber thread 4F2 is provided so as to extend in the left-right direction along a portion serving as an upper edge of the front body region 1F shown in FIG. The rubber thread 4F2 is provided in parallel with three at a predetermined interval. A plurality of thread rubbers 4F3 are provided next to the three thread rubbers 4F2 so as to extend in the left-right direction similarly to the thread rubbers 4F2. When the diaper 1 is worn, the rubber thread 4F3 is located near the left and right ends of the pelvis of the wearer, and thereby mainly holds the diaper 1 on the waist of the wearer. Further, the thread rubber 4F2 has a function of preventing liquid from leaking from the diaper 1 by surrounding the wearer's abdominal region above the thread rubber 4F3 in a state in which the diaper 1 is worn, and a function of the thread rubber 4F3. It has a function of relieving the pressure on the wearer due to the contracting force and a function of discharging moisture in the diaper 1. As shown in FIG. 3, a plurality of thread rubbers 4F4 and 4F5 are provided next to the thread rubber 4F3 so as to extend in the left-right direction similarly to the thread rubber 4F3. Then, as described above, the rubber thread 4F4, 4F5 is cut at the portion corresponding to the absorber 8.

FIG. 4 is a diagram showing the relationship between the interval between the thread rubbers 4F2 and the size of the ventilation path appearing in the waist gather 3R in the front body region 1F. The view shown in FIG. 4A is a view of the waist gather 3R as seen from the side where the wearer's skin touches. Further, the diagram shown in FIG. 4B is a diagram showing an internal structure in the waist gather 3R when viewed from the side of the diaper 1. Further, the diagram shown in FIG. 4C is a diagram showing a state in which the waist gather 3R is viewed from above the diaper 1. 4D is a diagram showing a state in which the waist gather 3R is viewed from above the diaper 1 in a state in which the waist gather 3R is contracted. Although the front body region 1F of the waist gather 3R is shown in FIG. 4 for convenience of description, the same applies to the rear body region 1R of the waist gather 3R.

As shown in FIG. 4, the cover sheet 4F is folded back along the folding line 4F6 shown in FIG. 2, and the ventilation path forming sheet 11F is further laminated and joined. The joining is performed in a state where each thread rubber and the sheet are stretched. The broken line with the symbol S in the diagram shown in FIG. 4A is the joined portion. In addition, the location of the reference symbol S in the diagrams shown in FIGS. 4C and 4D is a joined portion.

The joint portion S that joins the cover sheet 4F and the air passage forming sheet 11F in a state where the cover sheet 4F is folded back along the folding line 4F6 is as shown in FIG. It has a linear shape extending in a direction perpendicular to the upper edge of the front body region 1F shown. A plurality of joint portions S are provided in parallel, and further, the respective intervals are provided so as to alternate in size. Therefore, the joining portion S has a form in which double lines are arranged at equal intervals, as can be seen from FIG. 4. By adopting a form in which the double lines constituted by the joint portions S are arranged at equal intervals, as shown in FIG. 4(D), the first ventilation passage 12 and the second ventilation passage 12 are provided in the waist gather 3R after contraction. The paths 13 are formed alternately. This is done in a state where the thread rubber and the sheet are stretched, and then the stretched state is released and the waist gather 3R is contracted by the contracting force of the thread rubber 4F2. A relatively small first air passage 12 is formed due to the bending of the seat in a portion with a narrow space between S, and a relatively large second air passage due to the bending of the sheet in a portion with a wide space between the double lines. This is because 13 is formed.

Since the joint portions S are formed such that the double lines are arranged at equal intervals, the first ventilation passage 12 and the second ventilation passage 13, which are formed by the bending of the sheet, are formed in the waist gather 3R after contraction. The corrugations are formed alternately. Reference numeral SS indicated by a chain double-dashed line in FIG. 4(D) indicates a skin surface abutting on the ventilation path forming sheet 11F as a virtual line when the wearer wears the diaper 1. The second ventilation passage 13 is formed as a gap formed between the skin contact surface of the ventilation passage forming sheet 11F and the wearer's skin when the diaper 1 is worn by the wearer. Moisture between the diaper 1 and the wearer's skin surface can be discharged to the outside through the second ventilation passage 13 formed in the waist gather 3R. The first ventilation path 12 is a path through which moisture that has permeated the ventilation holes 11F1 of the ventilation path forming sheet 11F passes. The diaper 1 can introduce the moisture generated between the diaper 1 and the skin surface into the first ventilation passage 12 through the ventilation hole 11F1 and discharge the moisture to the outside. Thereby, the diaper 1 can suppress the stuffiness of the wearer. The 2nd ventilation path 13 is a path|route which connects the space between the diaper 1 and the skin surface, and the external space of the diaper 1 directly, and it discharges the moisture in the diaper 1 more smoothly. Further, since the ventilation path forming sheet 11R has the ventilation holes 11R1, the diaper 1 can also obtain the same effect in the rear body region 1R of the waist gather 3R.

Next, the center sheet 9 of the diaper 1 according to the embodiment will be described in detail. As shown in FIG. 3, the center sheet 9 is a liquid-permeable sheet member that covers the skin side of the absorber 8. The center sheet 9 has a rectangular shape in which the direction connecting the front body region 1F and the rear body region 1R is the longitudinal direction.

FIG. 5 is a plan view of the center sheet 9 viewed from the skin surface side. In the figure, the upper side is the front body region 1F and the lower side is the rear body region 1R. The center seat 9 is arranged across the front body region 1F and the rear body region 1R. Further, the center sheet 9 has an upper sheet 9A arranged on the skin side and a lower sheet 9B arranged on the absorber 8 side so as to be superposed on the upper sheet 9A. Nonwoven fabric is used for the upper sheet 9A and the lower sheet 9B. The upper sheet 9A and the lower sheet 9B have rectangular shapes of substantially the same size and are stacked so that their longitudinal direction and width direction are the same. The upper sheet 9A and the lower sheet 9B are joined at each end in the longitudinal direction. A plurality of valve portions 20 are formed on the upper seat 9A. A plurality of valve parts 20 are arranged in a matrix. The plurality of valve portions 20 may be arranged in a staggered pattern or other arrangement pattern.

FIG. 6A is an enlarged view of a region A surrounded by a circular dotted line in FIG. The valve portion 20 is defined by a curved cut 21 that penetrates the upper sheet 9A in the thickness direction, and is connected to the upper sheet 9A by an uncut portion 22 that connects each end 21A, 21B of the cut 21. In a plan view, the notch 21 is a curved curve having a convex shape such as a C-shape, a U-shape, a V-shape, etc., and the uncut portion 22 becomes a linear shape, and the valve portion 23 is connected to the skin side sheet 9A by the uncut portion 22 Is formed in. In the embodiment, the notch 21 has a fan-shaped arc shape having a central angle θ of about 270 degrees and is substantially C-shaped. The notch 21 may have a semicircular shape, a U-shape, or a V-shape, for example. The notch 21 may be formed so as to be convex in one direction and leave a linear uncut portion 22 on the opposite side of the convex side.

FIG. 6B is a cross-sectional view taken along line BB passing through the centers of the valve portion 20 and the uncut portion 22 in FIG. 6A. The valve portion 20 is bent toward the lower seat 9B side with the uncut portion 22 as a starting point, and is joined to the lower seat 9B. In FIG. 6(B), the joint portion S1 between the valve portion 20 and the lower seat 9B is shown surrounded by an elliptical dotted line. The valve portion 20 and the lower sheet 9B are joined by, for example, hot melt, ultrasonic fusion, or heat fusion.

By joining the valve portion 20 to the lower sheet 9B, a hole 23 that connects the skin surface side of the upper sheet 9A and the space 24 between the upper sheet 9A and the lower sheet 9B is formed. The diaper 1 introduces the solid matter contained in the watery feces into the space 24 through the holes 23. Further, the diaper 1 absorbs the liquid contained in the watery feces with the absorber 8 arranged in a layer below the lower sheet 9B. As a result, the diaper 1 can separate the solid matter and the liquid contained in the watery feces. The diaper 1 stores the solid matter in the space 24 and absorbs the liquid by the absorbent body 8 while separating the solid matter and the liquid contained in the watery feces to lose the fluidity of the watery feces. , Leakage can be suppressed. In addition, by forming a hole or a notch that penetrates the lower sheet 9B, it is possible to more easily introduce the liquid into the absorber 8 arranged in the lower layer of the lower sheet 9B.

Further, the center seat 9 is arranged so as to extend from the front body region 1F to the rear body region 1R, and in the mounted state, the lower seat 9B is relatively to the center portion in the longitudinal direction from the upper seat 9A in the front body region 1F direction. Since it moves in the rear body region 1R direction, the hole 23 is expanded by pulling the valve portion 20 by the lower seat 9B. As described above, in the diaper 1, it is desirable that the hole 23 be expanded in the mounted state in order to easily introduce the solid matter into the space 24 from the hole 23. Thereby, the diaper 1 can make it easy to introduce the solid matter into the space 24 through the hole 23.

Also, as shown in FIG. In the diaper 1, the plurality of valve portions 20 may be formed so that the uncut portion 22 faces the anal contact position 25 on the upper sheet 9A where the wearer's anus contacts. FIG. 7 is a plan view of the center sheet 9 as seen from the skin side, as in FIG. An anus contact position 25, which is located in the crotch region 1B and is in contact with the anus of the wearer, is defined on the upper sheet 9A. In the upper seat 9A, a plurality of valve portions 20 are provided in a first region A1 on the front body region 1F side of the anus contact position 25 and a second region A2 on the rear body region 1R side of the anus contact position 25. Has been formed. The valve portion 20 in the first region A1 is formed so that the uncut portion 22 faces toward the rear body region 1R side. The valve portion 20 in the second region A2 is formed so that the uncut portion 22 faces toward the front body region 1F side. The watery feces discharged from the wearer's anus onto the upper sheet 9A are diffused from the anus contact position 25 in the front body region 1F direction or the rear body region 1R direction. In the diaper 1, the uncut portion 22 faces the rear body region 1R side in the first region A1 on the front body region 1F side of the anus contact position 25, and the second region on the rear body region 1R side of the anus contact position 25. By arranging each valve portion 20 so that the cutout 22 faces the front body region 1F side in A2, the cutout 25 is passed through the valve portion 20 along the moving direction of the solid matter of the discharged feces. The solid material can be guided to the hole 23. Thereby, the diaper 1 can suppress leakage by rapidly introducing the solid matter of watery feces into the space 24 from the hole 23.

Next, a configuration example in which the hole 23 can be expanded will be described. FIG. 8 is a plan view of the center sheet 9 as seen from the skin side similarly to FIG. In this example, a plurality of rubber threads 26, which are elastic members, are arranged on the center sheet 9.

As shown in FIG. 8, a plurality of rubber threads 26 are arranged on the upper sheet 9A. Each thread rubber 26 extends in the direction (longitudinal direction) connecting the front body region 1F and the back body region 1R, and the upper sheet 9A expands and contracts between the first region A1 and the second region A2. Is glued to. The thread rubbers 26 may be adhered to either the skin side of the upper sheet 9A or the lower sheet 9B side. The thread rubbers 26 are arranged between the valve portions 20 arranged in a matrix. The upper sheet 9A contracts in the first body region A1 in the rear body region 1R direction by contracting the rubber thread 26 around the first region A1 and the second region A2, and in the second region A2, the front body body. Contract in the direction of the area 1F. In the diaper 1, the uncut portion 22 faces the rear body region 1R side in the first region A1 on the front body region 1F side of the anus contact position 25, and the second region on the rear body region 1R side of the anus contact position 25. Each valve section 20 is arranged so that the cutout 22 faces the front body region 1F side in A2, and the upper sheet 9A is changed to the lower seat 9B so that the cutout 22 moves toward the anus contact position 25. The hole 23 can be expanded by moving it relatively. Thereby, the diaper 1 can easily introduce the solid matter of watery feces into the space 24 from the hole 23, and can suppress the leakage.

Further, the rubber thread 26, which is an elastic member, may be arranged on the lower sheet 9B. FIG. 9 is a plan view of the lower sheet 9B viewed from the skin surface side. As shown in FIG. 9, a plurality of rubber threads 26 are arranged on the lower sheet 9B. In FIG. 9, the anal contact position 25, the first area A1, and the second area A2 in the upper sheet 9A are illustrated for the sake of explanation. Each thread rubber 26 extends and contracts around a position corresponding to the first area A1 and the second area A2 in a state of extending in a direction (longitudinal direction) connecting the front body region 1F and the rear body region 1R. Is adhered to the upper sheet 9A. The position corresponding to the first area A1 and the second area A2 is the position between the first area A1 and the second area A2 of the upper sheet 9A when the center sheet 9 is viewed in the thickness direction. It is the overlapping position. Each thread rubber 26 may be adhered to either the upper sheet 9A side of the lower sheet 9A or the absorber 8 side.

The lower sheet 9B contracts in the rear body region 1R direction in the region corresponding to the first region A1 and contracts in the front body region 1F direction in the region corresponding to the second region A2 due to the contraction of each rubber thread 26. To do. In the diaper 1, the uncut portion 22 faces the rear body region 1R side in the first region A1 on the front body region 1F side of the anus contact position 25, and the second region on the rear body region 1R side of the anus contact position 25. Each valve section 20 is arranged so that the cutout 22 faces toward the front body region 1F side in A2, and the lower sheet is moved so that the cutout 22 moves together with the joint S1 toward the anus contact position 25. The hole 23 can be expanded by moving 9B relative to the upper sheet 9A. As a result, the diaper 1 can be easily introduced into the space 24 from the hole 23, and leakage can be suppressed.

In the examples shown in FIGS. 8 and 9, at least one rubber thread 26 may be disposed on either the upper sheet 9A or the lower sheet 9B. The hole 23 of the diaper 1 can be expanded by contracting the upper sheet 9A or the lower sheet 9B.

In addition, although the diaper 1 was illustrated in the said embodiment, the said structure and the manufacturing method are applicable also to the absorbent article of other forms. Examples of the absorbent article to which the above configuration and manufacturing method can be applied include various types of absorbent articles with gathers such as pants-type disposable diapers, tape-type disposable diapers, urine pads, and light incontinence pads, and no gathers. Mention may be made of flat absorbent articles.

1... Diaper: 1B... Inseam area: 1F... Front body area: 1R... Back body area: 2T... Trunk opening: 2L... Left lower limb opening: 2R... Right lower limb opening: 3BL, 3BR... 3D gather: 3R... West gather: 4F, 4R... Cover sheet: 4F1, 4R1... Opening: 4F2, 4F3, 4F4, 4F5, 4R2, 4R3, 4R4, 4R5, 10L1, 1
0R1 ··· Rubber thread: 4F6, 4R6, 10L2, 10R2 · · Folding line: 4F7, 4F8, 4R7, 4R8 · · Edge: 5F, 5R · · Inner cover sheet: 6 · · Pad cover sheet: 7 · · Back sheet : 8... Absorber: 9... Center sheet: 9A... Upper sheet: 9B... Lower sheet: 10L, 10R... Side sheet: 11F, 11R... Ventilation path forming sheet: 11F1, 11R1... Pore: S... Joint part: 12... First ventilation path: 13... Second ventilation path: 20... Valve part: 21... Notch: 21A, 21B... Notch end: 22... Uncut: 23.. Hole: 24.. Space: 25.. Anal contact position: 26.. Thread rubber: S1.. Joint part: A1.. First area: A2.. Second area

Claims (5)

An absorber,
A liquid-permeable sheet member that covers the skin side of the absorber,
Equipped with
The sheet member has an upper sheet arranged on the skin surface side, and a lower sheet overlapped on the upper sheet and arranged on the absorber side,
A valve portion that is defined by a curved cut that penetrates the upper sheet in the thickness direction, and that is connected to the upper sheet by a cut residue that connects both ends of the cut,
The valve portion is formed by being joined to the lower sheet, the skin surface side of the upper sheet, a hole that communicates with the space formed between the upper sheet and the lower sheet,
An absorbent article comprising: A front body region that covers the wearer's abdomen, a back body region that covers the wearer's back, and is located between the front body region and the back body region, and comprises a crotch region that covers the wearer's inseam,
The sheet member is arranged across the front body region and the rear body region,
The valve portion is located in the crotch region of the upper seat and is closer to the front body region than the anus contact position where the wearer's anus contacts, and the anal contact position of the upper seat. A plurality of them are formed in the second region on the rear body region side,
The valve portion in the first region is formed so that the uncut portion faces toward the rear body region side,
The valve portion in the second region is formed so that the uncut portion faces toward the front body region side.
The absorbent article according to claim 1. A stretchable member arranged in the upper sheet so as to stretch around the first region and the second region in a state of extending in a direction connecting the front body region and the back body region,
The upper sheet contracts toward the back body region in the first region and contracts toward the front body region in the second region when the elastic member contracts.
The absorbent article according to claim 2. Expansion and contraction arranged on the lower sheet so as to expand and contract around a position corresponding to the first region and the second region in a state of extending in a direction connecting the front body region and the back body region. Equipped with members,
The lower sheet contracts toward the back body region in the region corresponding to the first region and contracts toward the front body region in the region corresponding to the second region due to the contraction of the elastic member. To do
The absorbent article according to claim 2. The notch is substantially C-shaped,
The absorbent article according to any one of claims 1 to 4.

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