JP6326222B2 - Disposable pants-type diapers - Google Patents

Description

  The present invention relates to a disposable pants-type diaper for infants or adults.

  Conventionally, disposable pants-type diapers are widely known, and disposable pants-type diapers are configured, for example, by arranging an absorbent core on the crotch portion of an exterior member formed in a pants shape. In many disposable pants-type diapers, the exterior member has a two-layer structure in which an outer sheet is laminated on the outer surface side of the inner sheet, and the width direction extends around the waist of the diaper between the inner sheet and the outer sheet. A trunk elastic member is provided extending in the direction. The torso elastic member can enhance the fit around the torso of the diaper, and the diaper is less likely to slip off when the diaper is worn.

  On the other hand, a disposable pants-type diaper in which an exterior member is composed of an inner sheet, an outer sheet, and an intermediate sheet provided therebetween is also known, and Patent Documents 1 and 2 disclose such a diaper. ing. In Patent Document 1, the trunk portion of the exterior member is configured by a three-layer structure of an inner sheet, an intermediate sheet, and an outer sheet, and a trunk elastic member is provided between the outer sheet and the intermediate sheet or between the inner sheet and the intermediate sheet. Disposable pants-type diapers are disclosed in which sheets that are arranged and the body elastic member is not disposed therebetween are joined to each other at a joint extending in the diaper width direction. In Patent Document 2, a body elastic member is disposed between the inner sheet and the intermediate sheet, an outer sheet is further provided on the outer surface side of the intermediate sheet, and the body elastic member serves as a joint between the inner sheet and the intermediate sheet and the outer side. There is disclosed a disposable pant-type diaper that is arranged so as not to pass through a joint portion between a sheet and an intermediate sheet and in which both end portions of a body elastic member are fixed to an inner sheet and an outer sheet.

JP 2009-207698 A JP 2009-297096 A

  As described above, the disposable pants-type diaper is often provided with a trunk elastic member at the trunk periphery, but the appearance of the disposable pants-type diaper has a great influence on the impression of the diaper. Therefore, from the viewpoint of improving the appearance of the diaper, it is preferable that the body elastic member is made as inconspicuous as seen from the outer surface side of the diaper, and the exterior member (especially the outer sheet) is as clean as possible by contraction of the body elastic member. It is preferable that a vertical fold (a ridge extending in the longitudinal direction of the diaper) is formed. Furthermore, the waist of the disposable pants-type diaper is easily stuffy because the waist of the waist is tightened by the contraction force of the body elastic member, reducing such stuffiness as much as possible and improving the feeling of wearing the diaper. It is preferable to make it. In particular, in the disposable pants-type diapers disclosed in Patent Documents 1 and 2, since the exterior member has a three-layer structure of an inner sheet, an intermediate sheet, and an outer sheet, moisture accumulated inside the diaper is released to the outside. It becomes difficult.

  This invention is made | formed in view of the said situation, The objective is a disposable pants type diaper provided with the trunk | drum elastic member extended in the diaper width direction in the trunk | drum circumference part, Comprising: A trunk | drum elastic member is not conspicuous It is possible to provide a disposable pants-type diaper that can be worn and has a good wearing feeling.

  The disposable pants-type diaper of the present invention that has solved the above problems includes an exterior member formed into a pants shape having a waist opening edge and a pair of leg opening edges, and a waist opening edge and a leg opening edge of the exterior member A disposable pants-type diaper having a body elastic member extending in the diaper width direction at a waist part between the inner sheet and the outer sheet, and an intermediate sheet disposed between them The body elastic member is disposed between the inner sheet and the intermediate sheet; and the outer sheet and the intermediate sheet are joined to each other at a plurality of first joint portions provided in the diaper width direction at the waist portion; The inner sheet and the intermediate sheet are characterized in that they are joined to each other by a second joint portion extending in the diaper width direction in the waist portion.

  The disposable pants-type diaper according to the present invention includes a first joint portion in which an outer sheet is provided on the outer surface side of an inner sheet and an intermediate sheet with a body elastic member interposed therebetween, and a plurality of outer sheets are arranged in the diaper width direction. In this case, the distance between the outer sheet and the intermediate sheet changes, and there is moderate unevenness in the degree of light transmission or scattering between the outer sheet and the intermediate sheet. Can improve the shielding property (visual shielding property). In addition, by providing a plurality of the first joint portions side by side in the diaper width direction, it is easy to regularly form ridges extending in the diaper longitudinal direction on the outer sheet. As a result, when viewed from the outer surface side of the diaper, the body elastic member becomes difficult to see, and the appearance of the diaper is improved. Further, by joining the inner sheet and the intermediate sheet to each other at the second joint extending in the diaper width direction, an air passage extending in the diaper width direction is easily formed between the inner sheet and the intermediate sheet, and the exterior member is arranged on the inner side. Even if it comprises the outer sheet in addition to the sheet and the intermediate sheet, the steam inside the diaper is released to the outside through the vent passage, so that the wearing feeling of the diaper can be improved.

  It is preferable that the 2nd junction part is formed with the adhesive apply | coated so that it may overlap with the trunk | drum elastic member and it may extend in the diaper width direction. Thus, if the 2nd junction part is formed, it will become easy to form the heel extended in a diaper longitudinal direction on an outside sheet by contraction of a body elastic member, and it can make the appearance of a diaper good. .

  The 2nd junction part may be formed with the adhesive agent applied so that it may extend in the diaper width direction between adjacent trunk part elastic members. Thus, if the 2nd junction part is formed, the contraction force of a trunk | drum elastic member will become difficult to be inhibited by the 2nd junction part, and it will become easy to improve the fitting property in the trunk periphery part of a diaper.

  A plurality of second joints are provided in the diaper longitudinal direction so as to extend in the diaper width direction, and the inner sheet and the intermediate sheet are bonded between the second joints provided in the diaper longitudinal direction. It is preferable that the agent non-application portion is formed so as to extend in the whole diaper width direction of the waistline portion. If the adhesive non-applied part is formed so as to extend in the entire diaper width direction of the waistline portion, the diffusibility of the steam inside the diaper in the diaper width direction is improved. As a result, the stuffiness inside the diaper is reduced and the feeling of wearing the diaper can be improved.

  It is preferable that a plurality of the first joint portions are provided side by side in the diaper longitudinal direction and the diaper width direction. By providing the first joint portion in this manner, when the exterior member contracts in the diaper width direction, the ridges extending in the longitudinal direction of the diaper are easily formed in a natural texture on the outer sheet. Further, by forming a portion where the outer sheet and the intermediate sheet are not joined in the longitudinal direction of the diaper, the degree of change in the distance between the outer sheet and the intermediate sheet is increased, and the visual shielding property by the outer sheet is improved. it can.

  It is preferable that a 1st junction part is formed by heat-embossing an outer sheet | seat and an intermediate sheet, and has a shape long in a diaper longitudinal direction. If the 1st junction part is formed by hot embossing, the joint strength in the 1st junction part of an outside sheet and an intermediate sheet will increase, and even if it repeats expansion and contraction of a body elastic member, joining of the 1st junction part is maintained. It becomes easy to be done. In addition, if the first joint portion is provided in a shape that is long in the diaper longitudinal direction, when the exterior member contracts in the diaper width direction by the body elastic member, a heel that extends in the longitudinal direction is easily formed on the outer sheet.

  The fineness of the nonwoven fabric constituting the outer sheet is preferably larger than the fineness of the nonwoven fabric constituting the intermediate sheet. If the outer sheet is formed in this way, the void ratio of the outer sheet is easily increased, and the outer sheet is formed in a bulky manner. As a result, it becomes easy to form suitably in the outer sheet | seat without the wrinkles extended in a diaper longitudinal direction, and the external appearance of a diaper becomes a favorable thing.

  The disposable pants-type diaper according to the present invention includes a first joint portion in which an outer sheet is provided on the outer surface side of an inner sheet and an intermediate sheet with a body elastic member interposed therebetween, and a plurality of outer sheets are arranged in the diaper width direction. By joining to the intermediate sheet, the visual shielding from the outer sheet side is enhanced, and the wrinkles extending in the longitudinal direction of the diaper are easily formed on the outer sheet, and the appearance of the diaper is improved. Furthermore, by joining the inner sheet and the intermediate sheet to each other at the second joint portion extending in the diaper width direction, an air passage extending in the diaper width direction is easily formed between the inner sheet and the intermediate sheet, and the stuffiness inside the diaper is increased. Is suitably released to the outside so that the diaper can be worn well.

An example of the disposable pants type diaper of this invention is represented, and the perspective view of a disposable pants type diaper is represented. The top view which looked at the state which melt | disengaged joining of the front waist part and rear waist part of the disposable pants-type diaper shown in FIG. The III-III sectional drawing of the disposable pants type diaper shown in FIG. 2 is represented. The example of the partially notched top view of the front trunk | drum periphery part of the disposable pants type diaper shown in FIG. 2 is represented. Sectional drawing of the diaper width direction of the trunk periphery part of the disposable pants type diaper shown in FIG. 4 is represented. The example of the partially notched top view of the front trunk | drum periphery part of the disposable pants type diaper shown in FIG. 2 is represented. Sectional drawing of the diaper width direction of the trunk periphery part of the disposable pants type diaper shown in FIG. 6 is represented. The example of the partially notched top view of the front trunk | drum periphery part of the disposable pants type diaper shown in FIG. 2 is represented.

  The disposable pants-type diaper of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments shown in the drawings. 1 to 3 show an example of the disposable pants-type diaper of the present invention. FIG. 1 shows a perspective view of a disposable pants-type diaper, and FIG. 2 shows a state in which the front waistline portion and the back waistline portion of the disposable pants-type diaper shown in FIG. The figure seen from the surface side is represented, and FIG. 3 represents III-III sectional drawing of the disposable pants-type diaper shown in FIG. In the drawings, the arrow x represents the diaper width direction, the arrow y represents the diaper longitudinal direction, and the direction perpendicular to the surface formed by the arrows x and y represents the diaper thickness direction z. Moreover, in this invention, a diaper width direction, a diaper longitudinal direction, and a diaper thickness direction may be only called a width direction, a longitudinal direction, and a thickness direction.

  The disposable pants-type diaper 1 of the present invention has an exterior member 2 formed in a pants shape having a waist opening edge 3 and a pair of leg opening edges 4. The waist opening edge 3 forms an opening (waist opening) for passing the wearer's torso. The leg opening edge 4 forms an opening (leg opening) for passing the wearer's leg. The disposable pants-type diaper 1 has a waist part 5 formed between a waist opening edge 3 and a leg opening edge 4 (that is, a part above the leg opening edge 3). The waist part 5 is a front waist part 5A. It is comprised from the back side trunk periphery part 5B.

  The exterior member 2 includes, for example, a front waistline portion 5A, a back waistline portion 5B, and a crotch portion 6 positioned therebetween. The exterior member 2 is formed in, for example, a pants shape by joining the front waistline portion 5A and the back waistline portion 5B to each other at the side joint portions 10 at both ends in the width direction x. The side joint portion 10 is formed, for example, by joining the front waistline portion 5A and the back waistline portion 5B to each other by thermal fusion.

  The front waistline portion 5A corresponds to a portion applied to the wearer's belly side when wearing the diaper, and the rear waistline portion 5B corresponds to a portion applied to the wearer's back side when wearing the diaper. . The crotch portion 6 is located between the front waistline portion 5A and the back waistline portion 5B, and corresponds to a portion applied between the wearer's crotch. The crotch portion 6 is formed between the left and right leg opening edges 4. The crotch portion 6 is a portion located in the middle of the exterior member 2 divided into three in the longitudinal direction y in a state where the front waistline portion 5A and the rear waistline portion 5B of the exterior member 2 are unbonded and developed in a plane. When formed in a pants shape, they are not joined to each other on both sides in the width direction x.

  In the disposable pants-type diaper 1, the longitudinal direction y means a direction from the front waistline portion 5A to the back waistline portion 5B, and corresponds to the front-rear direction of the wearer's crotch when the diaper is worn. The width direction x corresponds to the left and right direction of the wearer when wearing a diaper.

  The disposable pants-type diaper 1 has a skin surface side and an outer surface side with respect to the thickness direction z of the diaper. The skin side of the diaper means a side close to the wearer's skin when the diaper is worn, and the outer side of the diaper means the side opposite to the wearer when the diaper is worn.

  The exterior member 2 includes an inner sheet 7, an outer sheet 9, and an intermediate sheet 8 disposed therebetween (see FIG. 3). That is, the exterior member 2 includes the inner sheet 7, the intermediate sheet 8, and the outer sheet 9 from the skin surface side. The intermediate sheet 8 is preferably provided adjacent to the inner sheet 7 and the outer sheet 9. The inner sheet 7, the intermediate sheet 8, and the outer sheet 9 may be provided on at least the waist part 5 of the exterior member 2, and a part or all of the inner sheet 7, the intermediate sheet 8, and the outer sheet 9 are pants-shaped. It may be formed.

  The crotch portion 6 is preferably provided with an absorbent core 21 (see FIGS. 2 and 3). The absorbent core 21 may be present at least in the crotch portion 6 and may further extend to the front waistline portion 5A and / or the rear waistline portion 5B. The absorbent core 21 is preferably provided on the skin surface side of the exterior member 2. For example, the absorbent main body 18 formed by disposing the absorbent core 21 between the top sheet 19 and the back sheet 20 is provided. Further, it may be provided on the skin surface side of the exterior member 2. The top sheet 19 is disposed on the skin surface side of the absorbent core 21, and the back sheet 20 is disposed on the outer surface side of the absorbent core 21.

  The shape (planar shape) of the absorbent core 21 is not particularly limited. Examples of the shape of the absorbent core 21 include a substantially rectangular shape, an hourglass shape, a gourd shape, and a battledore shape. In FIG. 2, the absorbent core 21 is formed in an hourglass shape.

  The absorbent main body 18 is preferably provided with rising flaps 22 on both sides in the width direction x. By providing the rising flap 22, it is possible to prevent side leakage of excrement such as urine. The rising flap 22 is preferably liquid impermeable. An elastic member 23 for standing is preferably provided at an upper end portion (end portion on the wearer side) in a state where the rising flap 22 is raised, and the rising force of the rising flap 22 is urged by the contraction force of the standing elastic member 23. .

  A waist elastic member 16 is preferably provided along the waist opening edge 3 at the end in the longitudinal direction y of the exterior member 2. The waist elastic member 16 forms a waist gather along the circumference of the wearer's waist and prevents excrement such as urine from the back side and the abdomen side from leaking.

  It is preferable that a trunk elastic member 13 extending in the width direction x is provided on the trunk periphery 5 of the exterior member 2. The body elastic member 13 is provided farther from the waist opening edge 3 than the waist elastic member 16, and is disposed at a wider interval than the waist elastic member 16 or arranged so as to have a stronger contraction force than the waist elastic member 16. It is preferred that With the torso elastic member 13, the disposable pants-type diaper 1 has improved fit around the wearer's torso.

  The exterior member 2 is preferably provided with leg elastic members 17 along the leg opening edges 4. The leg elastic member 17 may be composed of a front leg elastic member 17A provided along the front leg opening edge 4 and a rear leg elastic member 17B provided along the rear leg opening edge 4. Preferably, the leg elastic member 17 is provided over substantially the entire circumference of the leg opening edge 4 by the front leg elastic member 17A and the rear leg elastic member 17B. Leg gathers along the circumference of the wearer's leg are formed by the leg elastic members 17A and 17B, and leakage of excrement such as urine from the crotch is prevented.

  By the way, in the conventional disposable pants-type diaper, the one provided with the trunk elastic member in the trunk periphery is known, but in the disposable pants-type diaper, the trunk elastic member is not conspicuous when viewed from the outer surface side. In addition, it is preferable to make the appearance of the diaper look good by forming as clean a vertical fold as possible on the exterior member (a ridge extending in the longitudinal direction of the diaper) by contraction of the body elastic member. By forming the disposable pants-type diaper in this way, the diaper can be formed in an appearance like underwear, and the psychological burden on the wearer of the diaper can be reduced. Furthermore, the waistline of disposable pants-type diapers is a place where the wearer's waistline is tightened by the contraction force of the body elastic member, and moisture tends to be trapped. It is preferable to improve the feeling of wearing.

  Therefore, in the disposable pants-type diaper of the present invention, first, as shown in FIGS. 4 to 8, the body elastic member 13 is disposed between the inner sheet 7 and the intermediate sheet 8, and further outward on the outer surface side of the intermediate sheet 8. The sheet 9 is provided, and the outer sheet 9 and the intermediate sheet 8 are joined to each other by the first joining part 11 provided in a row in the width direction x in the waist part 5. By providing the outer sheet 9 in this manner, the distance between the outer sheet 9 and the intermediate sheet 8 is changed, and moderate unevenness is caused in the degree of light transmission or scattering between the outer sheet 9 and the intermediate sheet 8. It is possible to enhance visual shielding from the 9 side (visual shielding). As a result, the body elastic member 13 can be made inconspicuous when viewed from the outer surface side of the diaper. Further, by providing a plurality of the first joint portions 11 in the width direction x, the outer sheet 9 is likely to be regularly formed with ridges extending in the longitudinal direction y, and the appearance of the diaper is improved. Can do.

  Furthermore, in the disposable pants-type diaper according to the present invention, the inner sheet 7 and the intermediate sheet 8 are joined to each other at the waist part 5 by the second joint part 12 extending in the width direction x, thereby the inner sheet 7 and the intermediate sheet. An air passage extending in the width direction x is easily formed between the two. Since a ridge extending in the longitudinal direction y is formed between the outer sheet 9 and the intermediate sheet 8, moisture in the diaper is easily diffused in both the width direction x and the longitudinal direction y in the waistline portion 5. Thus, even if the exterior member 2 is composed of the outer sheet 9 in addition to the inner sheet 7 and the intermediate sheet 8, the moisture inside the diaper is reduced, and the wearing feeling of the diaper can be improved.

  Hereinafter, the disposable pants-type diaper of the present invention will be described in more detail with reference to FIGS. 4, 6, and 8 are partially cutaway plan views of the waistline portion seen from the skin surface side of the diaper, and examples in which the second joint portion is provided in various modes are shown. . FIG. 5 shows a diaper width direction sectional view of the waist part of the disposable pants-type diaper shown in FIG. 4, and FIG. 7 shows a diaper width direction of the waist part of the disposable pants-type diaper shown in FIG. A cross-sectional view is shown.

  In the exterior member 2, the body elastic member 13 is disposed between the inner sheet 7 and the intermediate sheet 8. The body elastic member 13 is preferably joined to the inner sheet 7 and / or the intermediate sheet 8 in an expanded state. On the other hand, it is preferable that no elastic member is disposed between the outer sheet 9 and the intermediate sheet 8. The leg elastic member 17 is also preferably disposed between the inner sheet 7 and the intermediate sheet 8 and joined to the inner sheet 7 and / or the intermediate sheet 8 in an extended state. The waist elastic member 16 may be disposed between the inner sheet 7 and the intermediate sheet 8 in the same manner as the body elastic member 13, and may be joined to the inner sheet 7 and / or the intermediate sheet 8 in an extended state, as will be described later. The intermediate sheet 8 and the inner sheet 7 folded back at the waist opening edge 3 may be sandwiched and fixed.

  For each elastic member, an elastic stretchable material used for a normal disposable diaper such as a polyurethane thread, a polyurethane film, or natural rubber can be used. For example, it is preferable that polyurethane yarn having a fineness of 40 to 1,240 dtex is arranged and fixed while being stretched at a magnification of 1.1 to 5.0 times. The magnification is 1.0 in the non-expanded state.

  It is preferable that the trunk | drum elastic member 13 is provided over the whole trunk periphery part 5 with respect to the width direction x. That is, it is preferable that the trunk | drum elastic member 13 is continuously provided ranging from the side junction part 10 of the one side of the width direction x to the side junction part 10 of the other side. Thus, by providing the trunk | drum elastic member 13, the fit property to a wearer is improved over the whole width direction x of the disposable pants type diaper 1.

  The body elastic member 13 is preferably joined to the inner sheet 7 and / or the intermediate sheet 8 at both ends at the side joints 10. In addition, the trunk | drum elastic member 13 may be joined to the inner sheet | seat 7 and the intermediate sheet 8 by the 2nd junction part 12, so that it may mention later.

  The outer sheet 9 and the intermediate sheet 8 are joined to each other at the first joint portion 11 in the waist portion 5. The 1st junction part 11 should just be formed by apply | coating an adhesive agent to the outer sheet | seat 9 and the intermediate sheet 8, or heat-seal | fusing the outer sheet | seat 9 and the intermediate sheet 8. The heat fusion may be performed by laminating the outer sheet 9 and the intermediate sheet 8, and applying a heated heat conducting material to the laminated sheet to melt a part of the sheet, and laminating an ultrasonic vibrator. You may carry out by making a part of sheet | seat fuse | melt by an ultrasonic vibration on a sheet | seat.

  A plurality of first joint portions 11 are provided side by side in the width direction x in the waistline portion 5. The outer sheet 9 and the intermediate sheet 8 may be folded back to the inner sheet 7 side at the waist opening edge 3 of the exterior member 2 and joined to the inner sheet 7 (not shown). The outer sheet 9 and the intermediate sheet 8 may be joined together in the width direction x (continuously along the waist opening edge 3). By configuring the exterior member 2 in this manner, even when the exterior member 2 repeatedly expands and contracts along the waist opening edge 3, it becomes easy to maintain the bonding between the outer sheet 9 and the intermediate sheet 8 and the handling property of the diaper is improved. To do. In this case, it is simple and preferable that the folded outer sheet 9 and the intermediate sheet 8 are joined to each other with an adhesive continuously applied in the width direction x. The outer sheet 9 and the intermediate sheet 8 folded at the waist opening edge 3 are preferably joined to the inner sheet 7 by an adhesive applied continuously in the width direction x. At this time, the waist elastic member 16 may be sandwiched and fixed between the intermediate sheet 8 folded back at the waist opening edge 3 and the inner sheet 7.

  Although the arrangement | positioning space | interval of the width direction x of the 1st junction part 11 is not specifically limited, From the point which the wrinkle extended in the longitudinal direction y is formed suitably in the outer side sheet 9, and the external appearance of the exterior member 2 is made favorable. The arrangement interval (pitch) in the width direction x of the joint portion 11 is preferably 2.5 mm or more, more preferably 5 mm or more, and preferably 20 mm or less, more preferably 15 mm or less. The interval is measured in a state in which the elastic member disposed in the diaper is not contracted by finely cutting the elastic member (hereinafter, the length measurement in the present invention is performed in the same manner). And).

  It is preferable that a plurality of the first joint portions 11 are provided in the body periphery portion 5 so as to be long in the longitudinal direction y and arranged in the width direction x. The shape long in the longitudinal direction y may be any shape as long as the length in the longitudinal direction y is longer than the length in the width direction x. If the 1st junction part 11 is provided in the shape long in the longitudinal direction y, when the exterior member 2 will shrink | contract in the width direction x by the trunk | drum elastic member 13, the collar extended in the longitudinal direction y will be formed suitably in the outer sheet | seat 9. It becomes easy.

  Although the 1st junction part 11 may be provided so that it may extend continuously in the longitudinal direction y and may be provided intermittently in the longitudinal direction y, Preferably, the 1st junction part 11 is the longitudinal direction y. It is provided intermittently. That is, it is preferable that a plurality of the first joint portions 11 are provided side by side in the width direction x and the longitudinal direction y. By providing the first joint portion 11 in this manner, when the exterior member 2 contracts in the width direction x, the wrinkles extending in the longitudinal direction y are easily formed on the outer sheet 9 with a natural texture. Further, since the portion where the outer sheet 9 and the intermediate sheet 8 are not joined in the longitudinal direction y is formed, the degree of change in the distance between the outer sheet 9 and the intermediate sheet 8 is increased, and the visual shielding by the outer sheet 9 is increased. Can increase the sex. As a result, the appearance of the diaper is good.

  The shape of the 1st junction part 11 is not specifically limited. For example, when a plurality of first joint portions 11 are provided side by side in the width direction x and the longitudinal direction y, the first joint portions 11 are provided in a shape such as a circle, an ellipse, an oval, a polygon, a waveform, a star shape, or the like. It only has to be done. When the 1st junction part 11 is provided so that it may extend continuously in the longitudinal direction y, the 1st junction part 11 should just be provided in linear form, such as a straight line, a wavy line, a zigzag line, for example. 4, 6, and 8, the first joint portion 11 is provided in an oval shape that is long in the longitudinal direction y.

  When a plurality of first joint portions 11 are provided in the width direction x and the longitudinal direction y, the size of the first joint portion 11 is preferably 1 mm or more, preferably 10 mm or less, more preferably 7 mm or less, 5 mm or less is more preferable. The size of the first joint 11 means the maximum length of one first joint 11.

  When the 1st junction part 11 is a shape long in the longitudinal direction y, and is provided intermittently in the longitudinal direction y, the 1st junction part 11 is the length of 1. with respect to the width direction x. 1 time or more is preferable, 1.2 times or more is more preferable, 5.0 times or less is preferable, and 3.0 times or less is more preferable. Thus, by providing the 1st junction part 11, it becomes easy to form the ridge which extends in the longitudinal direction y of a diaper in the outer sheet | seat 9, and makes the trunk | drum elastic member 13 inconspicuous seeing from the outer surface side of a diaper. it can. From the same viewpoint, it is also preferable that the first joint portion 11 is provided such that the interval between the first joint portions 11 with respect to the width direction x is wider than the interval between the first joint portions 11 with respect to the longitudinal direction y.

  The first joint portion 11 is preferably formed by hot embossing the outer sheet 9 and the intermediate sheet 8. If the 1st junction part 11 is formed in this way, the outer sheet | seat 9 and the intermediate sheet 8 will be heat-seal | fused by the 1st junction part 11, the joining strength in the 1st junction part 11 will increase, and the trunk | drum elastic member 13 will be increased. Even if the expansion and contraction is repeated, the bonding of the first bonding portion 11 is easily maintained. Moreover, it becomes easy to provide the 1st junction part 11 by arbitrary shapes and arrangement | positioning, and it becomes easy to form a wrinkle in the outer sheet | seat 9 as desired.

  When forming the 1st junction part 11 by hot embossing, it is preferable that the 1st junction part 11 is formed in a concave shape seeing from the outer surface side of the exterior member 2. In this case, for example, the outer sheet 9 and the intermediate sheet 8 are laminated between a hot embossing roll (a roll that can be heated with a predetermined embossing pattern formed on the surface) and a flat roll. The first joint portion 11 can be formed in a concave shape when viewed from the outer surface side of the exterior member 2 by sandwiching it so as to be in contact with the roll and sending it out. Thus, if the 1st junction part 11 is formed, when the exterior member 2 is touched by hand, the texture of the outer surface of the outer sheet | seat 9 in which a heel is formed will become soft, and the feeling of use of a diaper will become improves.

  The inner sheet 7 and the intermediate sheet 8 are joined to each other by the second joining portion 12 in the waist portion 5. The 2nd junction part 12 should just be formed by apply | coating an adhesive agent to the inner sheet | seat 7 or the intermediate sheet 8, or heat-sealing the inner sheet | seat 7 and the intermediate sheet 8. The thermal fusion may be performed by laminating the inner sheet 7 and the intermediate sheet 8 and applying a heated heat conductive material to the laminated sheet to melt a part of the sheet, and by laminating an ultrasonic vibrator. You may carry out by making a part of sheet | seat fuse | melt by an ultrasonic vibration on a sheet | seat.

  The 2nd junction part 12 is provided so that it may extend in the width direction x. That is, the 2nd junction part 12 is provided in the shape where the length of the width direction x is longer than the length of the longitudinal direction y. Preferably, a plurality of the second bonding portions 12 are provided side by side in the longitudinal direction y so as to extend in the width direction x. By providing the second joint portion 12 in this way, an air passage extending in the width direction x is easily formed between the inner sheet 7 and the intermediate sheet 8. The air passage formed in this way functions so as to release moisture inside the diaper to the outside at the waist portion 5. That is, moisture accumulated in the diaper is easily diffused in the width direction x through the air passage formed between the inner sheet 7 and the intermediate sheet 8 and further passes through the intermediate sheet 8, whereby the intermediate sheet 8. The inside of the bag formed between the outer sheet 9 and the outer sheet 9 is easily diffused in the longitudinal direction y, and finally moisture is easily released out of the diaper. Therefore, even if the exterior member 2 is composed of the outer sheet 9 in addition to the inner sheet 7 and the intermediate sheet 8, the moisture inside the diaper is reduced and the wearing feeling of the diaper can be improved.

  The 2nd junction part 12 may be provided so that it may extend continuously in the width direction x, and may be provided so that it may extend intermittently in the width direction x. In the latter case, it is preferable that a plurality of the second joint portions 12 provided side by side in the width direction x are provided in a shape that is long in the width direction x.

  The second joint portion 12 may be provided so as to overlap with the body elastic member 13 or may be provided without overlapping with the body elastic member 13. In the former case, the body elastic member 13 is joined to the inner sheet 7 and the intermediate sheet 8 by the second joint 12, and the inner sheet 7 and the intermediate sheet 8 are joined by the second joint 12. Become.

  4 to 8 show various modes of the trunk periphery 5 provided with the second joint 12. 4 and 5 show a mode in which the second joint portion 12 is provided so as to overlap the body elastic member 13 and continuously extend in the width direction x, and FIGS. A mode is shown in which the two joint portions 12 are provided so as to overlap the body elastic member 13 and extend intermittently in the width direction x, and in FIG. 8, the second joint portion 12 is adjacent to the body elastic member. 13, an embodiment is shown that is provided so as to extend continuously in the width direction x.

  It is preferable that the 2nd junction part 12 is formed by application | coating of an adhesive agent. If the 2nd junction part 12 is formed with an adhesive agent, when forming the 2nd junction part 12, there is no possibility that the trunk | drum elastic member 13 distribute | arranged between the inner side sheet | seat 7 and the intermediate sheet 8 may be fractured | ruptured or damaged. . As the adhesive forming the second joint portion 12, it is preferable to use a hot melt adhesive, and it is more preferable to use a rubber-based hot melt adhesive.

  As shown in FIG. 4 and FIG. 6, the second joint portion 12 may be formed of an adhesive that is applied continuously or intermittently so as to overlap the body elastic member 13 and extend in the width direction x. preferable. If the 2nd junction part 12 overlaps with the trunk | drum elastic member 13, while joining the inner sheet | seat 7 and the intermediate sheet 8 by the 2nd junction part 12, fixing the trunk | drum elastic member 13 to these sheets | seats The trunk elastic member 13 can be easily attached to the inner sheet 7 and the intermediate sheet 8. Further, due to the contraction of the body elastic member 13, the folds extending in the longitudinal direction y are easily formed uniformly on the outer sheet 9. As a result, the appearance of the diaper can be improved. The second joint portion 12 may be formed in the same manner with respect to the waist elastic member 16.

  When the second joint portion 12 is formed of an adhesive applied so as to overlap the body elastic member 13 and extend in the width direction x, the body elastic member 13 is the first joint portion 11 of the exterior member 2. It is preferable that the inner sheet 7 and the intermediate sheet 8 are bonded to each other in the region 15 (hereinafter referred to as “first bonding portion arrangement region”). The first joint portion arrangement region 15 is defined in a state where the exterior member 2 is viewed in plan, and is defined on a plane perpendicular to the thickness direction z. Therefore, the 1st junction part arrangement | positioning area | region 15 is prescribed | regulated also in the inner sheet | seat 7 in which the 1st junction part 11 is not provided. The first joint portion arrangement region 15 is located between the first joint portions 11 on the outermost side (outermost side in the width direction x) of the first joint portions 11 provided side by side in the width direction x in the waistline portion 5. It is a region, and means a region from the first joint 11 provided on the rightmost side of the trunk periphery 5 to the first joint 11 provided on the leftmost side. Accordingly, the exterior member 2 is configured such that the outer sheet 9 and the intermediate sheet 8 are joined to each other at the trunk periphery 5 by the first joints 11 provided in a row in the width direction x. A first joint portion arrangement region 15 extending from the rightmost first joint portion 11 in the width direction x to the leftmost first joint portion 11 is formed in the surrounding portion 5.

  The body elastic member 13 is joined to the inner sheet 7 and the intermediate sheet 8 at both ends at the side joints 10, and the middle part between the both ends is joined to the inner sheet 7 and the intermediate sheet at the first joint placement region 15. 8 is preferably joined. Thus, if the trunk | drum elastic member 13 is provided, the wrinkle extended in the longitudinal direction y will become easy to be formed regularly over the whole width direction x of the trunk | drum periphery part 5. FIG. The body elastic member 13 may also be joined to the inner sheet 7 and the intermediate sheet 8 over the entire width direction x of the body periphery 5.

  When the second joint portion 12 is formed of an adhesive that is applied so as to overlap the body elastic member 13 and extend in the width direction x, the second joint portion 12 applies the adhesive to the body elastic member 13. The body elastic member 13 to which the adhesive is applied may be formed on the inner sheet 7 or the intermediate sheet 8, and the adhesive may be applied to the inner sheet 7 or the intermediate sheet 8, and the body part may be applied thereto. The second joining portion 12 may be formed by arranging the elastic member 13. In addition, it is preferable to form the 2nd junction part 12 by the former method, and, thereby, the trunk | drum elastic member 13 can be attached to the inner sheet | seat 7 or the intermediate sheet 8 simply.

  As shown in FIG. 4, the second joint portion 12 is preferably formed of an adhesive that overlaps with the body elastic member 13 and is continuously applied in the width direction x. If the second joint portion 12 is formed in this way, the outer sheet 9 is evenly gathered in the width direction x due to the contraction of the body elastic member 13, and the outer sheet 9 has a wrinkle extending in the longitudinal direction y. It becomes easy to form uniformly.

  As shown in FIG. 8, the 2nd junction part 12 may be formed with the adhesive agent apply | coated so that it may extend in the width direction x between the trunk | drum elastic members 13 which adjoin. In this case, the body elastic member 13 is preferably joined to the inner sheet 7 and the intermediate sheet 8 at the side joint 10. Thus, if the 2nd junction part 12 is formed, the contraction force of the trunk | drum elastic member 13 will become difficult to be inhibited by the 2nd junction part 12, and the fit property in the trunk | drum periphery part 5 can be improved.

  When the 2nd junction part 12 is formed with the adhesive agent applied so that it may extend in the width direction x between the adjacent trunk | drum elastic members 13, the 2nd junction part 12 is continuously provided in the width direction x. However, preferably, the second joint portion 12 is continuously provided in the width direction x. By providing the second joint portion 12 in this manner, even if the exterior member 2 contracts in the width direction x by the body elastic member 13, an air passage extending in the width direction x is formed between the inner sheet 7 and the intermediate sheet 8. It becomes easy to form suitably, without being crushed.

  When the 2nd junction part 12 is formed by apply | coating an adhesive agent, the adhesive agent non-application | coating is provided between the 2nd junction part 12 provided in the inner side sheet 7 and the intermediate sheet 8 along with the longitudinal direction y. The portion 14 is preferably formed so as to extend in the entire width direction x of the waist portion 5. 4 and 6, the adhesive non-applied portion 14 is formed between the adjacent barrel elastic members 13 so as to extend in the entire width direction x of the barrel periphery 5, and in FIG. 8, the barrel elastic member 13 is used. The adhesive non-application part 14 is formed so as to extend in the entire width direction x of the waist part 5. If the adhesive non-application portion 14 is formed so as to extend in the entire width direction x of the waistline portion 5, the diffusibility of the moisture inside the diaper in the width direction x is improved in the waistline portion 5. As a result, moisture inside the diaper is reduced, and the wearing feeling of the diaper can be improved.

  Next, each sheet constituting the exterior member will be described. The inner sheet, the intermediate sheet, and the outer sheet may be composed of a sheet member such as a nonwoven fabric, a woven fabric, a knitted fabric, or a plastic film. Preferably, the inner sheet, the intermediate sheet, and the outer sheet are each composed of a nonwoven fabric.

  As the nonwoven fabric constituting each sheet of the exterior member, it is preferable to use a nonwoven fabric formed from synthetic fibers such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon). If the nonwoven fabric formed from the synthetic fiber is used, it becomes easy to give a desired physical property to each sheet | seat of an exterior member. Moreover, it becomes easy to heat-seal | bond an outer sheet | seat and an intermediate | middle sheet | seat, when forming each junction part by hot embossing. The nonwoven fabric of each sheet of the exterior member may be hydrophilic or hydrophobic. However, when the nonwoven fabric is made hydrophilic, the surface of the synthetic fiber is treated with a surfactant, or the synthetic fiber is What is necessary is just to mix surfactant in a raw material at the time of forming.

  The kind of nonwoven fabric which comprises each sheet | seat of an exterior member is not specifically limited, A spun bond nonwoven fabric, an air through nonwoven fabric, a point bond nonwoven fabric, a chemical bond nonwoven fabric, a melt blown nonwoven fabric, a spunlace nonwoven fabric, an airlaid nonwoven fabric, etc. can be used. For example, if a spunbonded nonwoven fabric is used for the sheet constituting the exterior member, the air permeability of the exterior member can be enhanced. If an air through nonwoven fabric is used for the sheet | seat which comprises an exterior member, an exterior member can be formed bulky and the cushioning property of an exterior member can be improved, or handleability can be improved.

  As specific configurations of the inner sheet, the intermediate sheet, and the outer sheet, for example, the inner sheet, the intermediate sheet, and the outer sheet are preferably made of spunbond nonwoven fabrics. If the exterior member is configured in this way, the air permeability of the exterior member is increased, and the moisture inside the diaper is easily reduced.

  It is also preferable that the inner sheet, the intermediate sheet, and the outer sheet are made of an air-through nonwoven fabric and the inner sheet and the intermediate sheet are made of a spunbond nonwoven fabric. Since the air-through nonwoven fabric is relatively bulky and has a good feel, the outer sheet on the outer surface side of the exterior member is an air-through nonwoven fabric, which improves the breathability of the exterior member and improves the feel of the exterior member. be able to.

  When the inner sheet, intermediate sheet, and outer sheet are composed of nonwoven fabrics in which the constituent fibers such as spunbond nonwoven fabric, air-through nonwoven fabric, and spunlace nonwoven fabric are oriented in one direction, the constituent fibers of the nonwoven fabric in each sheet are oriented in the diaper width direction. It is preferable. By configuring the exterior member in this manner, the breaking strength of the exterior member in the diaper width direction is increased, and the exterior member is less likely to break even if the waist portion of the exterior member is repeatedly expanded and contracted in the diaper width direction. Further, in the inner sheet and the intermediate sheet, the rigidity in the diaper width direction is likely to be increased. As a result, an air passage extending in the diaper width direction is easily formed between the inner sheet and the intermediate sheet. In the outer sheet and the intermediate sheet, as described above, when the first joint portion is provided in a shape long in the diaper longitudinal direction, the first joint portion is in the fiber orientation direction of the nonwoven fabric of the outer sheet and the intermediate sheet. It will be provided in a shape that is long with respect to the orthogonal direction. As a result, in the outer sheet and the intermediate sheet, the constituent fibers of the nonwoven fabric are firmly bonded to each other by the first bonding portion, and the strength is increased even in the longitudinal direction of the diaper.

  In the exterior member, the constituent fibers of the nonwoven fabric of the inner sheet and the intermediate sheet are preferably oriented in the diaper width direction, and the constituent fibers of the nonwoven fabric are preferably oriented in the diaper longitudinal direction for the outer sheet. In this case, the heel extending in the longitudinal direction of the diaper is easily formed on the outer sheet, and the appearance of the exterior member can be enhanced.

  The orientation direction of the constituent fibers of the nonwoven fabric can be confirmed by observing the surface of the nonwoven fabric with a microscope or the like. For example, in a spunbonded nonwoven fabric, the orientation direction of the constituent fibers is described as follows. A spunbonded nonwoven fabric can be obtained, for example, by melting a polymer raw material, extruding it from a spinneret, stretching it, and accumulating it on a conveyor belt or the like and forming it into a web shape. The webs (fibers) accumulated on the belt are arranged along the traveling direction of the conveyor belt. Therefore, in this case, the web (fiber) is oriented along the traveling direction (MD direction) of the conveyor belt. For air-through nonwoven fabrics and spunlace nonwoven fabrics, when producing nonwoven fabrics, the orientation direction of the constituent fibers is aligned by appropriately setting the method of collecting the raw short fibers during fiber lump formation and the method of opening fibers during web formation. Can do.

  The basis weight of the inner sheet, the intermediate sheet, and the outer sheet is not particularly limited, but the basis weight of the outer sheet is preferably larger than the basis weight of the intermediate sheet. By making the basis weight of the outer sheet larger than the basis weight of the intermediate sheet, it becomes easy to suitably form a ridge extending in the longitudinal direction of the diaper on the outer sheet. That is, when the outer periphery of the exterior member contracts in the diaper width direction, a lot of wrinkles that are finer than the outer sheet are easily formed on the intermediate sheet, and the formation of wrinkles on the outer sheet is less likely to be hindered by the intermediate sheet. As a result of the formation of a large basis weight, the outer sheet can be suitably formed without crushing the wrinkles extending in the longitudinal direction of the diaper. More preferably, the outer sheet is formed so as to have a larger basis weight than the inner sheet.

  The fineness of the inner sheet, the intermediate sheet, and the outer sheet is not particularly limited, but the fineness of the nonwoven fabric constituting the outer sheet is preferably larger than the fineness of the nonwoven fabric constituting the intermediate sheet. If the outer sheet is formed in this way, the void ratio of the outer sheet is easily increased, and the outer sheet is formed in a bulky manner. As a result, it becomes easy to form suitably in the outer sheet | seat without the wrinkles extended in a diaper longitudinal direction, and the external appearance of a diaper becomes a favorable thing. On the other hand, since the intermediate sheet has a small fineness of the nonwoven fabric constituting the intermediate sheet, it becomes easier to follow the expansion and contraction of the body elastic member, and a large number of fine wrinkles are formed on the intermediate sheet in a state where the body elastic member contracts, It becomes difficult to inhibit wrinkle formation of the outer sheet. More preferably, the outer sheet is formed so that the fineness of the non-woven fabric to be formed is larger than that of the inner sheet.

  Some or all of the inner sheet, the intermediate sheet, and the outer sheet may be an embossed nonwoven fabric having an embossed portion. The embossed non-woven fabric means a non-woven fabric obtained by embossing a single non-woven fabric. For example, as described above, the outer sheet and the intermediate sheet are embossed by being hot embossed at the first joint portion. Different from what was formed.

  The embossed nonwoven fabric has an embossed part formed by pressing the nonwoven fabric in a predetermined pattern. The embossed portion is preferably formed by heating and pressing (non-heat embossing) the nonwoven fabric. The embossed non-woven fabric is not bonded to other sheets stacked adjacent to each other at the embossed portion by heat fusion.

  If embossed nonwoven fabric is used as the inner sheet, intermediate sheet, or outer sheet, the strength of each sheet is increased, and even if the periphery of the exterior member repeats expansion and contraction in the diaper width direction, the exterior member is less likely to break. . For example, if the outer sheet is made of an embossed nonwoven fabric, the embossed portion imparts stiffness (stiffness) to the nonwoven fabric, and a heel extending in the longitudinal direction of the diaper is easily formed. If the inner sheet and the intermediate sheet are made of an embossed nonwoven fabric, an air passage extending in the diaper width direction is easily formed. Preferably, each of the inner sheet, the intermediate sheet, and the outer sheet is made of an embossed nonwoven fabric.

  When the inner sheet, the intermediate sheet, and the outer sheet are made of an embossed nonwoven fabric, the size of the embossed portion of the outer sheet is preferably larger than the size of the embossed portions of the inner sheet and the intermediate sheet. If the embossed part of the outer sheet is provided with a size larger than the embossed part of the inner sheet and the intermediate sheet, the outer sheet is given a stronger stiffness than the inner sheet and the intermediate sheet, and the outer sheet is not crushed. It becomes easy to form suitably. On the other hand, the inner sheet and the intermediate sheet have relatively weak stiffness, and the inner sheet and the intermediate sheet can easily follow the expansion and contraction of the body elastic member disposed between them. Therefore, in a state where the body elastic member is contracted, a large number of fine ridges are formed on the inner sheet and the intermediate sheet, and it is easy to gather together in the diaper width direction, and as a result, the distance between the outer sheet and the intermediate sheet is reduced. It becomes easy to change, and can improve the visual shielding property from the outer surface side of the exterior member.

  The number of embossed parts per predetermined area of the outer sheet is preferably smaller than the number of embossed parts per predetermined area of the inner sheet and the intermediate sheet. That is, it is preferable that the outer sheet is provided with an embossed portion at a lower density than the inner sheet and the intermediate sheet on a number basis. By reducing the number of embossed portions provided on the outer sheet, the outer sheet can have the soft touch inherent to the nonwoven fabric. As a result, the touch on the outer surface side of the exterior member can be improved. What is necessary is just to measure the number of the embossed parts provided in each sheet | seat, for example, the number of the embossed parts provided in the area | region of 5 cm x 5 cm of a trunk periphery part.

  On the other hand, it is preferable that the outer sheet is provided with an embossed portion at a higher density than the first joint portion and the second joint portion on a number basis. That is, it is preferable that the number of embossed portions per predetermined area of the outer sheet is larger than the number of the first joint portions and the second joint portions. Since the embossed part is formed by embossing a single non-woven fabric, compared to the case where the first joining part is formed by hot embossing the outer sheet and the intermediate sheet, for example, The degree of pressing tends to be weak. Therefore, even if many embossed portions are provided, the flexibility of the outer sheet is easily ensured. On the other hand, the strength of the outer sheet can be increased by providing many embossed portions.

  The total area of the embossed portion provided per predetermined area of the outer sheet is preferably smaller than the total area of the embossed portion provided per predetermined area of the inner sheet and the intermediate sheet. By providing the embossed portion of the outer sheet so as to have a small area as a whole, the outer sheet can be soft to the touch and the outer surface of the exterior member can be improved. What is necessary is just to measure the area of the embossed part provided in each sheet | seat, the area of all the embossed parts provided in the area | region of a trunk | drum, for example, 5 cm x 5 cm.

  The shape and arrangement of the embossed part are not particularly limited, but the embossed part is preferably provided in a dotted shape with an arbitrary shape. If the embossed portion is provided in this way, the inner sheet and the intermediate sheet can easily follow the expansion and contraction of the body elastic member, and the outer sheet is suitably formed with a ridge extending in the longitudinal direction of the diaper due to the contraction of the body elastic member. It becomes easy. The shape of each embossed part is not particularly limited, such as a circle, an ellipse, an oval, a polygon, a waveform, a star, etc. These may be provided in a regular arrangement pattern, or a random arrangement pattern. May be provided. Preferably, a plurality of embossed portions are provided side by side in one direction and the other direction (one direction and the other direction on each sheet surface) in each sheet. The embossed portions provided in the inner sheet, the intermediate sheet, and the outer sheet may have the same shape or may have different shapes. For example, when the embossed portion is provided in a circular shape on each sheet, the strength of each sheet can be increased isotropically. Moreover, you may provide an outer sheet | seat in the shape long in a diaper longitudinal direction from the point which makes it easy to form the ridge | line | column extended in a diaper longitudinal direction.

  The outer sheet of the exterior member is preferably made of a non-woven fabric containing irregularly shaped cross-section fibers and / or crimped fibers from the viewpoint of improving visual shielding properties. The irregular cross-section fiber is not circular but has an elliptical shape, polygonal shape, radial shape (including star shape), dumbbell shape, arc shape (crescent shape), etc. In the nonwoven fabric, light is scattered in a complicated manner, and the whiteness and glossiness of the nonwoven fabric can be increased. Since the crimped fiber has a shape in which the fiber is crimped like, for example, a coil, even in the nonwoven fabric containing the crimped fiber, light is scattered in a complicated manner, and the whiteness and glossiness of the nonwoven fabric can be increased. Therefore, if a non-woven fabric containing a modified cross-section fiber and / or crimped fiber is used as the outer sheet, the visual shielding property of the outer sheet is increased, and the body elastic member becomes difficult to see when viewed from the outer surface side of the diaper. In addition, the nonwoven fabric containing a modified cross-section fiber and / or a crimped fiber includes a nonwoven fabric containing a crimped fiber with a modified cross-section.

  The fiber cross-sectional shape of the irregular cross-section fiber is not particularly limited as long as it is not circular. In addition, it is preferable that the external shape of a fiber cross section has a recessed part from the point which raises the scattering degree of light, specifically, radial-shaped, dumbbell shape, arc shape (crescent shape) etc. It is preferable that the fiber is a modified cross-sectional fiber having an outer fiber cross-sectional shape.

  An irregular cross-section fiber may be produced by a known method. For example, an abnormal cross-section fiber is formed by extruding a polymer raw material from a spinneret having an irregular discharge hole, or a composite fiber is divided to form an irregular cross-section fiber. can do. In particular, if the former method is used, various types of non-woven fabric composed of irregular cross-section fibers can be easily produced.

  The crimped fiber can be produced by a known method. For example, the crimped fiber can be obtained by using a parallel type (side-by-side type) composite fiber or an eccentric core-sheath type composite fiber as a constituent fiber of the nonwoven fabric. These composite fibers are composed of two components having different thermal shrinkage ratios in the fiber cross section, and as a result, the two components are extruded from the spinneret and integrated, and then cooled, while being cooled. As a result, the fibers are crimped into a coil shape, and crimped fibers are obtained. Further, the crimped fiber may be a crimped fiber obtained by subjecting a long fiber composed of a single component to false twisting (Wooling).

  Regarding the constituent members of the disposable pants-type diaper of the present invention, materials of each member other than the exterior member will be described. A top sheet is a sheet | seat located in a wearer side in the case of diaper wear, and it is preferable that it is liquid-permeable. As the top sheet, for example, a nonwoven fabric formed from hydrophilic fibers such as cellulose, rayon, and cotton, and a hydrophobic property such as polyolefin (eg, polypropylene, polyethylene), polyester (eg, PET), polyamide (eg, nylon), etc. A non-woven fabric formed from fibers, in which the surface of hydrophobic fibers is hydrophilized with a surfactant, can be used. Further, as the top sheet, a woven fabric, a knitted fabric, a plastic film in which holes are formed, or the like may be used.

  The back sheet is a sheet located on the side opposite to the wearer when the diaper is worn, that is, on the outside, and is preferably liquid-impermeable. As the back sheet, a non-woven fabric formed from hydrophobic fibers such as polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon), a plastic film, or the like can be used. Moreover, you may use the laminated body of a nonwoven fabric and a plastic film. In the present invention, liquid impermeability includes the meaning of water repellency.

  When using a nonwoven fabric as each sheet material demonstrated above, it is preferable to use a spunbond nonwoven fabric, an air through nonwoven fabric, a point bond nonwoven fabric, a melt blown nonwoven fabric, an airlaid nonwoven fabric, an SMS nonwoven fabric, etc. as a nonwoven fabric.

  The absorbent core is not particularly limited as long as it includes an absorbent material that can absorb excrement such as urine. As an absorptive core, the molded object which shape | molded the absorptive material in the predetermined shape can be used, for example. The absorbent core may be covered with a sheet member such as a paper sheet (for example, tissue paper or thin paper) or a liquid-permeable nonwoven fabric. Examples of the absorbent material contained in the absorbent core include hydrophilic fibers such as cellulose fibers (for example, pulverized pulp fibers), polyacrylic acid-based materials, polyaspartic acid-based materials, cellulose-based materials, starch-acrylonitrile-based materials, and the like. Water-absorbing resin etc. are mentioned. Further, the absorbent material may include a heat-fusible fiber such as a polyolefin fiber such as polyethylene or polypropylene, a polyester fiber such as PET, or a polyamide fiber such as nylon. These heat-fusible fibers may be subjected to a hydrophilic treatment with a surfactant or the like in order to increase the affinity with body fluid such as urine.

  It is preferable that an absorptive material contains a hydrophilic fiber from the point which improves the absorption speed | rates, such as urine. Moreover, it is preferable that an absorptive material contains a water absorbing resin from the point which raises absorption capacity. Therefore, it is preferable that an absorptive core contains a hydrophilic fiber (especially pulp fiber) and a water absorbing resin. In this case, it is preferable to use, for example, a mixture of hydrophilic fibers mixed or dispersed in an aggregate of hydrophilic fibers.

  The absorbent core may be a sheet-like absorber. Examples of the sheet-like absorber include those formed so as to have a water-absorbing resin between nonwoven fabrics and have no pulp fibers. Since the sheet-like absorbent body thus formed has a water-absorbing resin between the nonwoven fabrics, a high absorption capacity can be realized. Moreover, since a sheet-like absorber does not have pulp fibers between nonwoven fabrics, it can be formed thin without being bulky.

  As a sheet-like absorber, a water-absorbing fiber may be used as an absorbent material. Also in this case, the sheet-like absorbent body is not bulky and is formed thin. Examples of the water-absorbing fiber include a fiber containing a protonated or salt-formed carboxyl group. For example, as disclosed in JP-B-52-42916, water-absorbing fibers can be obtained by hydrolyzing acrylic fibers and converting nitrile groups contained in the acrylic fibers into carboxyl groups. At this time, it is preferable that the carboxyl group contained in the water-absorbing fiber forms an alkali metal salt or an ammonia salt. Moreover, a water absorbing fiber can be manufactured by immersing a hydrophilic fiber in acrylic acid and precipitating acrylic acid on the fiber surface.

1: disposable pants-type diaper 2: exterior member 3: waist opening edge 4: leg opening edge 5: waistline part 5A: front waistline part 5B: rear waistline part 6: crotch part 7: inner sheet 8: Intermediate sheet 9: Outer sheet 10: Side joint 11: First joint 12: Second joint 13: Body elastic member 17: Leg elastic member, 17A: Front leg elastic member, 17B: Rear leg Elastic member 18: Absorbent body 21: Absorbent core

Claims (5)

An exterior member formed in a pants shape having a waist opening edge and a pair of leg opening edges;
Disposable pants-type diaper having a plurality of trunk elastic members extending in the diaper width direction at the trunk periphery between the waist opening edge and the leg opening edge of the exterior member,
The exterior member has an inner sheet, an outer sheet, and an intermediate sheet disposed therebetween,
The body elastic member is disposed between the inner sheet and the intermediate sheet;
The outer sheet and the intermediate sheet are joined to each other at a first joint portion provided in the diaper width direction at the waist portion,
The inner sheet and the intermediate sheet are bonded to each other at a second bonding portion that continuously extends in the diaper width direction in the waist portion,
The second joint portion is formed by an adhesive applied so as to extend in the diaper width direction between adjacent body elastic members ,
The entire inner sheet and the intermediate sheet are arranged in the diaper width direction of the waistline portion so that the adhesive non-applied portion overlaps the body elastic member between the second joint portions arranged in the longitudinal direction of the diaper. A disposable pants-type diaper characterized by being formed so as to extend . The disposable pants-type diaper according to claim 1, wherein a plurality of the first joint portions are provided side by side in a diaper longitudinal direction and a diaper width direction. The disposable pants-type diaper according to claim 1 or 2 , wherein the first joint portion is formed by hot embossing an outer sheet and an intermediate sheet and has a shape that is long in the longitudinal direction of the diaper. The disposable pants-type diaper according to any one of claims 1 to 3 , wherein the fineness of the nonwoven fabric constituting the outer sheet is larger than the fineness of the nonwoven fabric constituting the intermediate sheet. The disposable pants-type diaper according to any one of claims 1 to 4 , wherein all of the plurality of trunk elastic members arranged around the trunk are overlapped with the inner sheet, the outer sheet, and the intermediate sheet.

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