JP2018108323A - Underpants-type diaper and wearing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underpants-type diaper which is hardly protruded from an underwear when being worn in an overlapped state to an underwear.SOLUTION: An underpants-type diaper comprises: an absorbent body (10) comprising an absorber (11), a skin side nonwoven fabric (12) arranged closer to a skin side than the absorber (11), a non-skin side film (14) arranged closer to a non-skin side than the absorber (11), and an external nonwoven fabric (16) arranged closer to the non-skin side than the non-skin side film (14); and belt parts (32) for connecting respective end parts of the absorbent body (10) in a longitudinal direction. The belt parts (32) are jointed to the absorbent body (10) by two pairs of junctions inclined to a lower side of the vertical direction and to outside of the lateral direction, and a minimum value of a distance between one end and the other end of the belt part (32) in the vertical direction is 50 mm or more and 100 mm or less. The belt parts and a crotch part of the absorbent body have a size at which, after a wearer wears an underwear, the belt parts and the crotch part are not protruded from the underwear.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a pants-type diaper and a method for wearing a pants-type diaper.

  Conventionally, as absorptive article, a disposable diaper formed in a pants type by a liquid absorber (diaper body) and waist belts arranged on both sides of the absorber is known. For example, Patent Document 1 discloses that both ends of a waist belt are coupled to both ends in the longitudinal direction of a diaper body in an inclined manner, and both leg portions between the coupled portions of the waist belt are cut out to form leg portions (leg openings). ) Is formed.

JP-A-9-290003

  Such a pants-type diaper may be worn under an underwear in daily life. In that case, it is desirable that both can be worn so that the diaper does not protrude from under the underwear. However, since a general diaper is configured by a highly flexible sheet member such as a nonwoven fabric, the sheet member is easily stretched when the sheet member is pulled in the operation of pulling up the diaper or adjusting the position. There is a risk that the part may protrude from the underwear. In particular, when the upper end portions of the abdominal side and the back side of the absorbent main body are pulled upward in order to fit the absorbent body, the upper end portions are extended, and a part of the absorbent main body easily protrudes from the upper end of the underwear. . Moreover, when each part dimension of a diaper is larger than the dimension of an undergarment, a diaper becomes difficult to fit under an undergarment.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a pant-type diaper that is difficult to protrude outside the underwear when worn under the underwear. is there.

A main invention for achieving the above object is a pants-type diaper having a longitudinal direction and a lateral direction intersecting each other, and formed with a waistline opening and a pair of leghole openings, and worn under an undergarment. There,
Absorber that absorbs excretory fluid, liquid-permeable skin-side nonwoven fabric disposed on the skin side of the absorber, and liquid-impermeable non-skin-side film disposed on the non-skin side of the absorber And an absorbent non-woven fabric disposed on the non-skin side of the non-skin side film, and an absorbent main body,
A belt portion arranged on each side of the transverse direction and connecting each end portion in the longitudinal direction of the absorbent main body;
Have
The belt part is joined to the absorptive body at two pairs of joints inclined downward in the longitudinal direction and outward in the lateral direction from the waistline opening toward the leghole opening. ,
The minimum value of the distance between the one end and the other end of the belt portion in the longitudinal direction is 50 mm or more and 100 mm or less,
The belt part and the crotch part of the absorbent main body are pants-type diapers characterized by having a size adjusted to a position hidden in the underwear after wearing the underwear .
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to provide a pant-type diaper that does not easily protrude outside the underwear when worn under the underwear.

1 is a schematic perspective view of a diaper 1. FIG. FIG. 2A is a schematic plan view of the diaper 1 in the stretched plate state as viewed from the belt portion 32 side, and FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A. FIG. 3A shows a state in which the belt portions 32 and 32 are opened outward in the lateral direction by releasing the respective joints of the front joint portions jf and jf and the rear joint portions jb and jb in the extended diaper 1 of FIG. 2A. FIG. 3B is a schematic plan view, and FIG. 3B is a BB cross-sectional view in FIG. 3A. It is a schematic sectional drawing explaining the structure of CC cross section of FIG. 3A. It is the schematic which shows about the case where a wearer wears the diaper 1 and also sees the state which wore the underwear from the top from the front (ventral side). It is a schematic plan view at the time of seeing the underwear type shape diaper 1 from the front (abdominal side) in a natural state. It is a schematic plan view of the state which extended the diaper 1 of the underpants type shape to the vertical direction and the horizontal direction. It is a figure shown about the result of having tested about the tensile strength of a diaper. 9A is a cross-sectional view taken along the line DD in FIG. FIG. 9B is a cross-sectional view taken along line EE in FIG.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

  A pant-type diaper having a longitudinal direction and a lateral direction intersecting each other and having a waist opening and a pair of leg openings, and an absorber that absorbs excretory fluid, and a skin that is more skin than the absorbent The liquid-permeable skin-side nonwoven fabric disposed on the side, the liquid-impermeable non-skin-side film disposed on the non-skin side of the absorber, and the non-skin-side side of the non-skin-side film A non-woven fabric comprising an absorbent main body, and belt portions arranged on both sides in the lateral direction to connect the respective ends in the longitudinal direction of the absorbent main body, At the two pairs of joints inclined downward from the longitudinal direction and outward in the lateral direction from the waistline opening toward the leg opening, the absorbent main body is joined, and the longitudinal body in the longitudinal direction The minimum distance between one end and the other end of the belt is 50 mm. In the longitudinal direction, the region above the upper end of the non-skin-side film in the longitudinal direction is at least three layers including the skin-side nonwoven fabric layer and the exterior nonwoven fabric layer. A pants-type diaper characterized by comprising:

  According to such a pants-type diaper, when worn on top of the underwear, the belt portion is easily pulled up obliquely together with the underwear and the fit is easily improved. Moreover, since the width | variety of a belt part is restrict | limited within the predetermined range, a belt part is easy to grasp and a belt part does not protrude easily from the side part of underwear after wearing. Moreover, when the upper end part of an absorptive main body is a 3 layer structure, the intensity | strength of the said part becomes high and the said part is hard to extend when pulling up an absorptive main body. Therefore, when worn over the underwear, the upper end portion of the absorbent main body is unlikely to protrude from the underwear, and good fit can be realized by pulling up the absorber firmly.

  It is desirable to have such a pants-type diaper having a liquid-impermeable hydrophobic sheet disposed on the skin side of the skin-side nonwoven fabric.

  According to such a pants-type diaper, by providing a hydrophobic sheet on the skin side surface of the longitudinal end of the absorbent main body, it is possible to suppress excretion fluid absorbed by the absorbent main body from returning to the skin side and oozing out. In addition, it is possible to make it difficult for the wearer to feel uncomfortable. Moreover, in the longitudinal direction edge part area | region of an absorptive main body, the intensity | strength of the said area | region can be raised by laminating | stacking with a skin side nonwoven fabric or an exterior nonwoven fabric.

  In such a pants-type diaper, the amount of elongation when the region above the upper end of the non-skin side film in the absorbent main body is pulled upward in the longitudinal direction with a force of 50 N is 1.0 mm or less. It is desirable.

  According to such a pants-type diaper, even when the region above the upper end of the non-skin side film is pulled upward in the absorbent main body when wearing the diaper, the region is difficult to stretch, It is suppressed that the upper end part of an absorptive main body protrudes from underwear. Moreover, since it becomes possible to pull up an absorber firmly by pulling the said area | region, favorable fitting property is realizable.

  In such a pants-type diaper, it is desirable that the length of the region of the absorbent main body above the upper end of the non-skin side film in the vertical direction is 20 mm or more.

  According to such a pants-type diaper, the region above the upper end of the non-skin side film in the absorbent main body is a region that is easily gripped with a finger when the wearer pulls the absorbent main body when wearing the diaper. Therefore, it is possible to facilitate the operation of the wearer pulling up the absorbent main body by making the region having a size that is easy to grasp while sufficiently securing the strength.

  In such a pants-type diaper, the belt portion has an end-end structure in which an upper end portion is folded back in the longitudinal direction, and the upper side of the non-skin side film of the absorbent main body is higher than the upper end portion. It is desirable that the length of the region in the longitudinal direction is shorter than the length in the longitudinal direction of a portion of the belt portion having the end-ending structure.

  According to such a pants-type diaper, the upper end region of the belt portion is easily pulled upward together so as to be pulled to a region above the upper end of the non-skin side film in the absorbent main body. Therefore, the operation of pulling up the absorbent main body makes it easy to adjust the overall position (height) of the waistline opening including the belt portion, improving fit and making it difficult for the diaper to protrude from the underwear.

  In such a pant-type diaper, the maximum value of the height of the heel formed in the region above the upper end of the non-skin side film in the longitudinal direction on the ventral side of the absorbent main body is the absorbent main body It is desirable that it is smaller than the maximum value of the height of the wrinkles formed in the region above the upper end of the non-skin side film in the longitudinal direction.

  According to such a pants-type diaper, when the diaper is worn under the underwear, the underwear is excessively lifted to the non-skin side in the thickness direction on the abdomen, or the diaper is worn under the underwear. Sticking is suppressed, and good fit is easily obtained. In addition, it is difficult to stand out wearing a diaper under the underwear.

  Such a pant-type diaper, having an upper end protruding in the vertical direction at the upper end in the vertical direction and the center in the horizontal direction on the stomach side and the back side of the absorbent main body, Is desirable.

  According to such a pants-type diaper, the user can easily recognize the central position in the lateral direction of the diaper at a glance. This makes it easier to fit the absorbent main body to the correct position of the body when wearing a diaper, effectively preventing the side leakage of excrement caused by wearing the absorbent main body in a laterally displaced state. Can be suppressed.

  In such a pants-type diaper, it is desirable that a length of the tip protruding portion protruding above the upper end of the joint portion in the vertical direction is 1 mm or more and 5 mm or less.

  According to such a pant-type diaper, it is suppressed that it becomes difficult to visually recognize a front-end | tip protrusion part by the protrusion length of a front-end | tip protrusion part being 1 mm or more. And the protrusion length of a front-end | tip protrusion part shall be 5 mm or less, and it will be suppressed that a front-end | tip protrusion part is curled or bent, or it protrudes from underwear. Thereby, it becomes easy to exhibit the function as a mark which the front-end | tip protrusion part shows the center position in a horizontal direction.

  In this pant-type diaper, the belt portion has a plurality of elastic members that expand and contract along the longitudinal direction of the belt portion, and the elastic member is continuous from one end to the other end in the longitudinal direction of the belt portion. It is desirable to be arranged.

  According to such a pants-type diaper, since the elastic member does not have a discontinuous portion in the longitudinal direction, the force that pulls the belt portion obliquely upward acts on the elastic member without being divided in the middle, Stretchability is developed over the entire length of the belt portion in the longitudinal direction. Thereby, the effect which pulls up an absorptive main body improves and can improve the fit nature of a diaper.

  In such a pants-type diaper, the joint portion is provided to stand on the non-skin side, and the absorbent main body and the belt portion are not joined to the non-skin side edge portion. Desirably, the width of the dry edge at both ends in the longitudinal direction of the joint is shorter than the width of the dry edge at the center in the longitudinal direction of the joint.

  According to such a pants-type diaper, by reducing the width of the dry edge in the vicinity of the waistline opening and the leg opening, the underwear and the joint are prevented from interfering with each other. It is possible to make it difficult to produce a sense of incongruity around the waist and legs.

  In such a pant-type diaper, in the natural state, the position of the lateral outer end of the belt portion and the longitudinal upper end is above the longitudinal end of the absorbent main body. It is desirable.

  According to such a pants-type diaper, since the belt portion is inclined upward from the natural state, when the belt portion is grasped and pulled up, the force is easily applied diagonally, and the force is easily transmitted to the entire area of the absorbent main body. . As a result, the belt portion can be easily lifted obliquely upward, and the absorbent main body can be easily widened while being pulled up in conjunction with the belt portion. Therefore, it becomes easy to improve the fit of the diaper.

  In such a pant-type diaper, in the natural state, the position of the laterally outer end of the belt portion and the lower end of the longitudinal direction is the laterally outer end of the belt portion and the longitudinal direction. It is desirable that it is outside in the lateral direction than the position of the upper end of.

  According to such a pants-type diaper, since both ends in the lateral direction of the belt portion, which is a portion grasped by hand, are inclined, it is easy to perform an operation of grasping and pulling up the belt portion.

  Also, a pants-type diaper having a longitudinal direction and a transverse direction intersecting each other, having a waist opening and a pair of leg openings, and worn under an undergarment, which absorbs excretory fluid Body, liquid-permeable skin-side nonwoven fabric disposed on the skin side of the absorbent body, liquid-impermeable non-skin-side film disposed on the non-skin side of the absorbent body, and the non-skin side An absorbent main body provided with an exterior non-woven fabric disposed on the non-skin side of the film, and a belt portion that is disposed on both sides of the lateral direction and connects each end in the longitudinal direction of the absorbent main body, And the belt portion is formed by two pairs of joints inclined downward in the vertical direction and outward in the lateral direction from the waistline opening toward the leg opening. Are joined, and one end and the other end of the belt portion in the longitudinal direction The minimum value of the distance is 50 mm or more and 100 mm or less, and the crotch part of the belt part and the absorbent main body is a size adjusted to a position hidden in the underwear after wearing the underwear. A pants-type diaper characterized by

  According to such a pants-type diaper, wearing an underwear overlaid on the diaper makes it difficult for the wearer to feel uncomfortable at the time of wearing the diaper, and the wearer can send everyday life as if wearing a normal underwear. it can. At that time, since the diaper is hidden under the undergarment and is not conspicuous, the wearer is less conscious of wearing the diaper and is less likely to experience mental anxiety.

  Further, it has a vertical direction and a horizontal direction that intersect each other, and is formed with a waist opening and a pair of leg openings, and is disposed closer to the skin than the absorber. Liquid permeable skin-side nonwoven fabric, liquid-impermeable non-skin-side film disposed on the non-skin side of the absorbent body, and exterior non-woven fabric disposed on the non-skin side of the non-skin-side film An absorbent main body comprising: an absorbent main body; and each of the longitudinal ends of the absorbent main body that are arranged on both sides in the lateral direction, and connect the longitudinal ends of the absorbent main body toward the leg-hole opening from the waistline opening. A belt part joined to the absorbent main body at two pairs of joints inclined to the outside in the lateral direction and the lateral direction, and a pants-type diaper wearing method comprising: Arrangement of pants-type diapers, and legs of the pants-type diapers and the underwear After passing the wearer's leg through the opening, the belt part is lifted obliquely upward together with the side part of the underwear, and the absorption is performed together with the longitudinal upper end part of the underwear on the stomach side and the back side. A method of wearing a pants-type diaper having the above-described vertical upper end of the sex main body is lifted.

  According to such a pants-type diaper wearing method, wearing the underwear on top of the diaper makes it difficult for the wearer to feel uncomfortable when wearing the diaper, and the wearer feels like wearing normal underwear. Can send. By wearing the underwear and the diaper together, the position of the diaper is less likely to shift with respect to the underwear, and the diaper can be worn so as not to protrude from under the underwear.

=== Embodiment ===
A pants-type disposable diaper 1 (hereinafter also referred to as diaper 1) as an example of an absorbent article according to the present embodiment will be described. The diaper 1 of this embodiment can be worn under the underwear, and each part is configured so that it can be worn without protruding from the underwear. FIG. 1 is a schematic perspective view of the diaper 1. This diaper 1 is already in a pants-type state as shown in FIG. 1 before being worn. And in this underpants type state, the diaper 1 has the vertical direction, the horizontal direction, and the front-back direction which are orthogonal to each other. In addition, when the diaper 1 is worn, the above vertical direction often faces the vertical direction. Therefore, hereinafter, the vertical direction is also referred to as “vertical direction”. Moreover, about this up-down direction, the upper side respond | corresponds to a wearer's waistline side, and the lower side respond | corresponds to a wearer's inseam side. On the other hand, about the front-back direction, the front side respond | corresponds to a wearer's belly side, and the back side respond | corresponds to a wearer's back side.

  Moreover, in the same pants-type state, the diaper 1 includes a band-shaped absorbent main body 10 that is folded in half at a substantially central position CLL10 (FIG. 2A) in the longitudinal direction, along the longitudinal direction in the vertical direction, Belt portions 32 and 32 that are respectively arranged on both sides and connect end portions 10eLf and 10eLb in the longitudinal direction of the absorbent main body 10 to each other, and leg portions that are respectively positioned on both lateral sides of the absorbent main body 10 Leg gathers 37 and 37 for forming the opening LH.

  That is, one end portion 10eLf of the end portions 10eLf and 10eLb of the absorbent main body 10 is located on the upper side and the front side, and the other end portion 10eLb is located on the upper side and the rear side. Further, on the front side of the diaper 1, a pair of front side joint portions jf and jf (corresponding to the joint portions) inclined from the upper side in the vertical direction to the lower side and from the inner side to the outer side in the horizontal direction are provided side by side. Similarly, on the rear side of the diaper 1, rear joints jb and jb (corresponding to joints) inclined from the upper side in the vertical direction to the lower side and from the inner side to the outer side in the horizontal direction A pair is provided side by side. And the end 10eLf of the absorbent main body 10 located on the front side and the lateral ends 32eLf, 32eLf of the belt portions 32, 32 are joined by the former pair of front side joining portions jf, jf, The end portions 37eLf and 37eLf of the leg gather portions 37 and 37 positioned on the front side and the lateral end portions 32eLf and 32eLf of the belt portions 32 and 32 are joined. Similarly, the end 10eLb of the absorbent main body 10 located on the rear side and the lateral ends 32eLb and 32eLb of the belt portions 32 and 32 are joined by the latter pair of rear side joining portions jb and jb. In addition, the end portions 37eLb and 37eLb of the leg gather portions 37 and 37 located on the rear side and the lateral end portions 32eLb and 32eLb of the belt portions 32 are joined.

  And thereby, in the same underpants type state, the waist part opening part BH is formed in the upper part of the diaper 1 by each said edge part 10eLf, 10eLb of the absorptive main body 10, and the upper end part of each belt part 32,32. Yes. Further, a pair of leg opening portions LH and LH are formed on both sides in the lateral direction by the laterally outer end portions of the leg gather portions 37 and 37 and the lower end portions of the belt portions 32 and 32.

  Further, each belt portion 32 is provided with a plurality of thread rubbers 33, 33,... Along the lateral direction, arranged in the vertical direction, whereby each belt portion 32 has lateral stretchability. Has been granted. On the other hand, a plurality of thread rubbers 38 along the longitudinal direction of the absorbent main body 10 are also arranged in each leg gather portion 37 in the lateral direction, whereby each leg gather portion 37 has Elasticity in the vertical direction is given. And based on these stretchability, the waist part opening part BH and the leg part opening part LH of the diaper 1 fit the wearer's waist part and leg part, respectively.

  Further, as shown in FIG. 3, the belt portion 32 has a portion around the leg portion, whereas a portion forming the waist opening BH (a lateral outer end portion of the belt portion 32 in FIG. 3) extends straight. A portion forming the opening LH (the inner end portion in the lateral direction of the belt portion 32 in FIG. 3) has a curved line (R shape) that protrudes toward the waist opening BH. Thereby, in the state formed in the underpants, the leg opening LH easily follows the curve around the leg of the underwear, and the diaper 1 does not easily protrude from the underwear even when worn under the underwear. In addition, due to such a curved shape, when the diaper 1 is worn (details of the wearing operation will be described later), when the belt portion 32 is pulled up obliquely upward, the lateral end region of the belt portion 32 in the pant-type shape Thus, a force obliquely upward can be easily applied to the belt portion 32 and the belt portion 32 can be smoothly pulled up obliquely upward.

  Such a diaper 1 is in the extended state as shown in FIGS. 2A and 2B at the final stage of the manufacturing process. 2A is a schematic plan view of the diaper 1 in the extended plate state as viewed from the belt portion 32 side, and FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A. FIG. 3A shows each belt portion 32 so that the skin side surface of the absorbent main body 10 can be seen by releasing the respective joints of the front joint portions jf and jf and the rear joint portions jb and jb in the diaper 1 in the extended state of FIG. 2A. , 32 are opened in a laterally outward direction, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. 3A. FIG. 4 is a schematic cross-sectional view illustrating the structure of the CC cross section of FIG. 3A. Moreover, the waveform line shown in FIG. 2B, FIG. 3B, and FIG. 4 has shown the adhesive typically, and also, the part shown with the hatching pattern of the left diagonally underline showed the welding part typically. Is.

The diaper 1 in the stretched plate state of FIG. 2A has the absorbent main body 10 on both sides in the front-rear direction parallel to the longitudinal direction so that the bifold of the absorbent main body 10 is released in the diaper 1 in the pant-type state of FIG. This is equivalent to the state of being pulled and stretched. And in this extended plate state, as shown to FIG. 2B, the belt parts 32 and 32 have overlapped with each skin side surface of the absorptive main body 10 and the leg gather parts 37 and 37. As shown in FIG.
Incidentally, conversely speaking, the absorbent main body 10 is elongated while pulling the laterally inner ends 32eW1 and 32eW1 of the pair of belt portions 32 and 32 in the extended diaper 1 in the lateral direction, respectively. If it is folded in half at the approximate center position CLL10 in the direction, the diaper 1 becomes a pants-type state as shown in FIG.

  Moreover, in this extended plate state, the diaper 1 has a longitudinal direction, a lateral direction, and a thickness direction that are orthogonal to each other. And this longitudinal direction is parallel to the longitudinal direction of a pants-type state. In addition, since the one side and the other side in the longitudinal direction correspond to the front side that is the stomach side of the wearer and the rear side that is the back side, respectively, the one side and the other side are hereinafter referred to as “front side”. Also referred to as “rear side”. Furthermore, in the extended plate state, the longitudinal direction of the diaper 1 is aligned with the longitudinal directions of the absorbent main body 10, the belt portion 32, and the leg gather portion 37. Therefore, in the following, these are simply referred to as “longitudinal direction” without distinction. On the other hand, the lateral direction is the same as the lateral direction of the pants-type state, and is simply referred to as “lateral direction” below. In addition, regarding the thickness direction, the side in contact with the wearer's body is also referred to as “skin side”, and the opposite side is also referred to as “non-skin side”.

  Furthermore, in this extended state, the diaper 1 is extended in the longitudinal direction. This “extended state” refers to each elastic member (for example, the rubber thread of the belt portion 32) arranged in the diaper 1. When the diaper 1 is stretched in the longitudinal direction against the contraction force by the rubber thread 33 or the leg gather portion 37), wrinkles and gathers are substantially invisible at the portion where each elastic member is disposed. The state extended to the extent. Therefore, the shape of the diaper 1 in the state extended in the longitudinal direction is the same as the shape of the diaper 1 extending flat in a state where the contraction force by each elastic member is not expressed.

Hereinafter, the structure of the diaper 1 is demonstrated, referring suitably to the diaper 1 of this extended plate state.
2A and 2B, leg gather portions 37 and 37 are located on both sides of the absorbent main body 10 in the lateral direction, respectively, and the skin side surface of the absorbent main body 10 and each leg gather portion 37. A pair of belt portions 32 are positioned side by side so as to overlap the skin side surfaces of.

  The belt portion 32 and the leg gather portion 37 are formed of the same sheet member 30. That is, as shown in FIGS. 3A and 3B, one sheet member 30, 30 is arranged on each side of the absorbent main body 10 in the lateral direction, and the lateral direction of each sheet member 30, 30 is The inner ends 30eW and 30eW are joined to the lateral ends 10eW and 10eW of the absorbent main body 10, respectively. Specifically, the inner end 30eW is bonded to the sheets 12, 14, and 16 while being inserted between a later-described top sheet 12 and the back sheet 14 or the exterior sheet 16 constituting the absorbent main body 10. Joined by agent or welding. Further, as shown in FIG. 3B, a folding line FL along the longitudinal direction is set between a portion of the sheet member 30 that becomes the belt portion 32 and a portion that becomes the leg gather portion 37. Each sheet member 30 is formed with a leg opening LH penetrating in the thickness direction so as to straddle the folding line FL in the lateral direction. Therefore, the belt portion 32 and the leg gather portion 37 are formed by folding the sheet member 30 inward in the lateral direction along the fold line FL. 2A, the absorbent main body 10 and the leg gather portions 37 and 37 and the belt portions 32 and 32 are joined to each other at the front joint portions jf and jf and the rear joint portions jb and jb shown in FIG. 2A. By fixing to a state, the diaper 1 of the above-mentioned extended plate state is formed.

  In addition, formation of the front side junction part jf and the rear side junction part jb is made | formed by the welding process by heat sealing, an ultrasonic seal, etc., or the adhesion process by an adhesive agent, and is made | formed by the welding process here.

  Further, as shown in FIG. 3B, the formation of the sheet member 30 is made, for example, by stacking two flexible sheets 30a, 30a such as nonwoven fabric in the thickness direction, and between the two stacked sheets 30a, 30a. Are fixed in a state in which the thread rubbers 33, 38 of the belt part 32 and the thread rubbers 38, 38 of the leg gather part 37 are extended in the longitudinal direction.

  Further, in this example, as shown in FIG. 2B, an end-end structure is provided for reducing the skin stress in a portion that becomes the waistline opening BH in the belt portion 32. That is, in the diaper 1 in the stretched plate state, the inner end portions 32eW1 and 32eW1 in the lateral direction of the belt portion 32 are portions that serve as the waist opening BH, but the end portions 32eW1 and 32eW1 are laterally extended. It is folded back multiple times and fixed in the folded state with an adhesive or the like, thereby reducing the load on the wearer's skin. Further, by having such an end portion closing structure, the thickness at the lateral end portion (end portion on the waistline opening BH side) of the belt portion 32 is thicker than the lateral central portion. Thereby, while the cushioning property in the waist opening BH becomes high, the upper end part (end part closing structure) of the belt part 32 is arrange | positioned above the wearer's pelvis (iliac bone) vertex position at the time of wearing of the diaper 1. The belt portion 32 is less likely to slip down due to the thick portion being caught by the pelvic protrusion. Therefore, the fitting property of the diaper 1 can be improved. However, it is not limited to this. That is, the end portion closing structure may be omitted without folding the end portion 32eW1.

  As shown in FIG. 3A, the absorbent main body 10 is a sheet-like member in which each end portion 10eLf, 10eLb in the longitudinal direction is tapered in a substantially V shape in plan view. That is, the absorptive main body 10 has a shape corresponding to the pair of front joint portions jf and jf and the pair of rear joint portions jb and jb at the end portions 10eLf and 10eLb in the longitudinal direction. 3B, the absorbent main body 10 includes an absorbent body 11 that absorbs excretory fluid such as urine, a liquid-permeable top sheet 12 that is disposed on the skin side of the absorbent body 11, and A liquid-impermeable back sheet 14 disposed on the non-skin side of the absorbent body 11 and an exterior sheet 16 disposed on the non-skin side of the back sheet 14.

  Each of the members 11, 12, 14, and 16 is joined to a member adjacent in the thickness direction by a hot melt adhesive or welding. That is, at the end portions 10eLf and 10eLb in the longitudinal direction of the absorbent main body 10, the members 11, 12, 14, and 16 are joined in a stacked state and fixed in the longitudinal direction. Thereby, each edge part 10eLf and 10eLb becomes difficult to extend in a longitudinal direction (vertical direction in underpants type shape), and the absorptive main body 10 becomes easy to be settled in underwear. The influence of the elongation of the end portions 10eLf and 10eLb will be described later. In addition, as an application pattern of the adhesive for joining the members, an Ω pattern, a spiral pattern, a stripe pattern, and the like can be exemplified. The same applies to the adhesive.

  Further, when the diaper 1 is worn under the undergarment, it is desirable that the product length as a longitudinal dimension of the absorbent main body 10 is as short as possible so that the diaper 1 is hidden under the undergarment. Specifically, it is preferably 450 to 750 mm. That is, if it is less than 450 mm, it can not cover the buttocks and promotes anxiety, and if it exceeds 750 mm, it will exceed the waist circumference, causing discomfort at the time of wearing, but if it is in the above range, These can be prevented and the diaper 1 is difficult to protrude from the underwear.

  Further, the absorbent main body 10 of the present embodiment has a distal end protrusion that protrudes in an arc shape on the outer side in the longitudinal direction (the upper side in the longitudinal direction in the pant-type shape) at the center in the lateral direction and the end on the ventral side in the longitudinal direction. Part 10s. When the diaper 1 is formed in a pants shape, the tip protruding portion 10s protrudes above the upper end (end portion 32eW1) of the belt portion 32 at the center in the lateral direction (see FIG. 1 and the like). The diaper 1 (absorbent body 10) can be easily recognized at a glance at the central position in the lateral direction. Thereby, when wearing the diaper 1, it becomes easy to fit the absorptive main body 10 to the correct position of the body, and the side leakage of excrement due to the absorptive main body 10 being worn in a state shifted laterally. It can be suppressed from occurring.

  In addition, when starting operation | movement which wears the diaper 1, in order to be able to confirm whether the diaper 1 is settled in underwear in the abdominal side and the back side, the front-end | tip protrusion part 10s is the back of the absorptive main body 10. It is desirable to be provided at both ends of the side and the ventral side (see FIG. 2, FIG. 3, etc.). Thereby, when the diaper 1 is worn, it becomes easy to visually recognize that the central part of the diaper 1 does not protrude from the underwear on the back side and the abdomen side, and the operation for adjusting the entire diaper 1 not to protrude from the underwear is easy. Can be done.

  The absorber 11 has a liquid-absorbing absorbent core (not shown) and a core wrap sheet (not shown) that covers the outer peripheral surface of the core. The absorbent core is obtained by molding a predetermined liquid absorbent material into a predetermined shape. In the example of FIG. 3A, the absorbent core is a molded body having a substantially rectangular shape in plan view having arcuate portions at the front end and the rear end. However, it is not limited to this. Moreover, as a liquid absorptive material, liquid absorptive granular materials, such as liquid absorptive fibers, such as a pulp fiber, and a superabsorbent polymer (what is called SAP), are not restricted at all. The core wrap sheet may be a liquid permeable sheet such as tissue paper or non-woven fabric, but the core wrap sheet may be omitted in some cases. In addition, it is preferable that the dimension of the longitudinal direction of the absorber 11 exists in 35 to 85% of said product length. The reason for this is that if it is not 35% or more, the crotch portion cannot be covered with the absorbent body 11 and leaks, whereas if it exceeds 85%, a sense of incongruity is caused at the time of wearing.

  The width W11 (that is, the distance between one end and the other end of the absorbent body 11 in the lateral direction) when the absorbent body 11 is stretched in the lateral direction may be 50 mm or more and 120 mm or less. Desirable (120 mm ≧ W11 ≧ 50 mm). By setting the width W11 of the absorbent body 11 to be equal to or less than 120 mm, when the diaper 1 is worn under the underwear, the absorbent body 11 can be easily stored in the underwear at the crotch portion. Moreover, it becomes easy to ensure sufficiently the area (absorption capacity) for absorbing excrement etc. by making width W11 50 mm or more.

  A plurality of grooves 17 are formed on the surface of the absorber 11. In this embodiment, the groove part 17 has the 1st groove part 171, the 2nd groove part 172, and the 3rd groove part 173 (refer FIG. 2). The groove portion 17 is formed linearly along the longitudinal direction at the center in the lateral direction of the absorber 11. The second groove portion 172 crosses a straight line passing through the center of the first groove portion 171 in the lateral direction and extending along the longitudinal direction (that is, a straight line corresponding to an extension line of the first groove portion 171), and the rear side (back side) in the longitudinal direction. ) Toward the outside in the lateral direction. The third groove portion 173 is formed in a parabolic shape that extends outward in the lateral direction toward the front side (belly side) in the longitudinal direction while intersecting the first groove portion 171 on the front side in the longitudinal direction than the second groove portion 172. .

  Each of these groove portions 17 is a pressing portion formed by pressing the surface of the absorbent body 11 by a predetermined pressing means. In addition, the groove part 17 may not be formed as a pressing part by which the absorber 11 was compressed, but may be formed as a slit. Moreover, it may not be formed in a continuous line shape as shown in FIG. 2, but may be formed by arranging a plurality of squeezed portions having a dotted shape or other shapes.

  The 1st groove part 171 has a function as a bending guidance part which guides the absorber 11 so that it may bend in the thickness direction. Specifically, when the diaper 1 is worn, the absorbent body 11 is bent along the first groove 171 along the first groove 171 at the wearer's crotch so as to be bent into a mountain shape so as to match the body shape of the wearer. Thus, the absorber 11 can be appropriately deformed. In addition, the diaper 1 of this embodiment assumes wearing on underwear, and the absorber 11 is arrange | positioned in the position near a wearer's body rather than underwear. Since the crotch width (crotch width) of a general underwear is in a range of 50 to 80 mm, the absorbent body 11 is deformed by providing the first groove portion 171 so that the absorbent body is within the crotch width of the underwear at the crotch portion. 11 can be more reliably and easily stored. That is, after making the above-mentioned dimension range (120 mm ≧ W11 ≧ 50 mm) and further deforming the absorber 11 three-dimensionally along the uneven shape of the body, the substantial width in the lateral direction of the absorber 11 is increased. Can be narrowed. Thereby, the absorber 11 becomes more difficult to protrude from the underwear in the crotch region.

  Further, in the region on the back side of the region where the first groove portion 171 is disposed, the force that deforms the absorber 11 into a mountain shape is transmitted to the outside in the lateral direction by the second groove portion 172, and the absorber 11 Since it becomes easy to be kept flat in the dorsal region, it is easy to fit the flat portion of the wearer's body back. Moreover, since the absorber 11 becomes easy to deform | transform into a curved surface shape along the parabola of the 3rd groove part 173, it can implement | achieve favorable fitting property with respect to the roundness of a wearer's buttocks.

  The top sheet 12 is formed of a liquid permeable sheet such as a nonwoven fabric, and here, an air-through nonwoven fabric is used. That is, the top sheet 12 corresponds to a “skin-side nonwoven fabric”. The planar size of the top sheet 12 is a size that protrudes from both sides in the longitudinal direction and both sides in the lateral direction of the absorbent body 11 as shown in FIG. 3A. And the part 12eW and 12eW which protrude in the horizontal direction are bent to the non-skin side and the inner side in the horizontal direction as shown in FIG. 3B, and thus the protruding parts 12eW and 12eW of the absorber 11 The lateral end 11eW is also covered from the non-skin side. Accordingly, the lateral ends 12eW and 12eW of the top sheet 12 do not rub against the skin, so that a sense of incongruity at the time of wearing is reduced.

  The back sheet 14 is formed of a liquid-impermeable sheet such as a polyethylene film or a polypropylene film. That is, the back sheet 14 corresponds to a “non-skin side film”. The back sheet 14 is also a planar sheet member that protrudes from both sides in the longitudinal direction and both sides in the lateral direction of the absorbent body 11.

  The exterior sheet 16 is formed of a flexible sheet such as a nonwoven fabric. That is, the exterior sheet 16 corresponds to an “exterior nonwoven fabric”. The exterior sheet 16 is a sheet member having a size that protrudes from both sides in the longitudinal direction and both sides in the lateral direction of the back sheet 14.

  Incidentally, in the following description, an expression such as “the skin side surface of the absorbent main body 10” may be used, but the sheet forming the skin side surface of the absorbent main body 10 depends on the planar position of the main body 10. Change. That is, at the position where the top sheet 12 exists, the skin side surface of the top sheet 12 forms the skin side surface of the absorbent main body 10. However, at the position where the top sheet 12 is not present and the back sheet 14 is present, the skin side surface of the back sheet 14 forms the skin side surface of the absorbent main body 10, and the top sheet 12 and the back sheet 14 At a position where both are not present, the skin side surface of the exterior sheet 16 forms the skin side surface of the absorbent main body 10.

  Each of the longitudinal ends 10eLf and 10eLb of the absorbent main body 10 has hydrophobic sheets 50 and 50 so as to cover the skin side surface of the absorbent main body 10 (refer to the dot pattern portion in FIG. 3). Is provided. That is, the hydrophobic sheet 50 is laminated on the skin side of the top sheet 12 (skin-side nonwoven fabric). The end portions 10eLf and 10eLb in the longitudinal direction of the absorbent main body 10 are portions that can face the wearer's abdomen or buttocks when the diaper 1 is worn, and the skin side of each of the end portions 10eLf and 10eLb is wet with excretory liquid. May cause discomfort to the wearer. On the other hand, by providing the hydrophobic sheet 50 on the skin side surface of each end 10eLf, 10eLb, it is possible to suppress excretion fluid absorbed by the absorbent main body 10 from returning to the skin side and oozing out, and to the wearer. Discomfort can be made difficult.

  As shown in FIG. 4, the top sheet 12, the back sheet 14, the exterior sheet 16, and the hydrophobic sheet 50 are all above the upper end 11eLf of the absorbent body 11 in the longitudinal direction (longitudinal direction). ) Has a protruding portion. Furthermore, the top sheet 12, the exterior sheet 16, and the hydrophobic sheet 50 have a portion that protrudes upward (torso side) from the upper end 14 eLf of the back sheet 14. That is, in the diaper 1 of the present embodiment, the top sheet 12, the exterior sheet 16, and the hydrophobicity in the region 10uf above the abdomen upper end 14eLf of the back sheet 14 (non-skin side film) in the absorbent main body 10. It has at least three layers including a sheet 50. In addition, in FIG. 4, although the cross-sectional structure of the absorptive main body 10 is shown only about the ventral | abdominal side of a longitudinal direction, the absorptive main body 10 has a substantially the same cross-sectional structure also about the back | dorsal side. That is, the absorptive main body 10 has at least three layers in a region 10ub (all not shown) above the upper end 14eLb on the back side of the back sheet 14 (non-skin side film).

  And in the edge part 10eLf and 10eLb of the longitudinal direction of an absorptive main body, these each layer (sheet | seat member) is mutually joined in the laminated | stacked state. If it is a normal underpants type diaper, the laminated | stacked sheet | seat members are joined via the elastic member (thread rubber) pinched | interposed between them. That is, the laminated sheet members are joined to each other in the portion where the elastic member exists, but are not joined to each other in the portion where the elastic member does not exist, and are joined when the sheet member is pulled. The unexposed part has a structure that is easy to stretch. On the other hand, in this embodiment, since the laminated | stacked sheet | seat members are joined by the surface, it has the structure which is hard to extend as a whole.

=== About the wearing aspect of the diaper 1 ===
As described above, the diaper 1 of the present embodiment can be worn under the underwear. In particular, when an adult wears underwear on top of the diaper 1, it becomes difficult for the wearer to feel uncomfortable when wearing the diaper, and the wearer can live daily life as if wearing a normal underwear. When wearing the diaper 1 with the underwear, place the diaper 1 in advance on the inside (skin side) of the underwear, pass the wearer's leg through the leg opening, and then put the diaper 1 and the underwear together By pulling up, the diaper 1 and the underwear can be worn without taking time and effort. Of course, after wearing the diaper 1, the underwear may be worn from above.

  FIG. 5 is a schematic diagram showing a case where the wearer wears the diaper 1 and further wears underwear from above, as viewed from the front (abdominal side). In FIG. 5, the underwear is represented by a solid line, and the diaper 1 is represented by a broken line. FIG. 6 is a schematic plan view of the pants-shaped diaper 1 as seen from the front (abdominal side) in a natural state. The “natural state” is a state when the diaper 1 is left for a predetermined time. For example, the belt part 32 of the diaper 1 is pulled outward in the lateral direction, the belt part 32 and the absorbent main body 10 are set in the “extended state”, and this extended state is continued for 15 seconds, and then the tension of the diaper 1 is released. And place it on a flat surface such as a desk. And the state which passed for 5 minutes by such plane flat placing is a natural state. FIG. 7 is a schematic plan view showing a state in which the diaper 1 having a pant shape is extended in the vertical direction and the horizontal direction. Note that the “extended state” in FIG. 7 is synonymous with the “extended state” described above. Further, in the natural state, the belt portion 32 is inclined obliquely with respect to the lateral direction as shown in FIG. 6, but in the extended state, the belt portion 32 has a shape extending straight in the lateral direction as shown in FIG.

  When the diaper 1 and the undergarment are worn on top of each other, as shown by the thick broken line arrows in FIG. 5, the side part of the belt part 32 of the diaper 1 and the side part of the undergarment are gripped and pulled obliquely upward. Is done. In the diaper 1, the pair of belt portions 32, 32 disposed on both sides in the lateral direction are obliquely joined to the absorbent main body 10 by the front joint portions jf, jf (rear joint portions jb, jb), respectively. Thus, in the natural state, the longitudinal direction of the belt portion 32 faces obliquely upward. Specifically, as shown in FIG. 6, when the laterally outer end and the longitudinal upper end of the belt portion 32 are the belt upper end 32 eu, the upper end 32 eu in the natural state is positioned at the upper end (tip protrusion) of the absorbent main body 10. It is on the upper side in the vertical direction from the position of the upper end of the portion 10s. Further, when the laterally outer end and the longitudinal lower end of the belt portion 32 are the belt lower end 32 eod, the position of the lower end 32 eod is in the lateral direction outside the position of the upper end 32 eu in the natural state. With this configuration, the belt portion 32 in the natural state is inclined toward the outer side in the horizontal direction and the upper side in the vertical direction with respect to the absorbent main body 10.

  Since the belt portion 32 is provided with the thread rubber 33 along the longitudinal direction, the thread rubber 33 is stretched in the longitudinal direction by the force of pulling the belt portion 32 obliquely upward. Stretch is developed. Due to this stretchability, the absorbent main body 10 is efficiently pulled up diagonally upward from both sides in the lateral direction via the belt portion 32 and the front side joint portion jf, and the absorbent main body 10 is widened in the width direction while being worn by the wearer. It becomes easy to fit in the crotch.

  In an ordinary diaper, the elastic member is arranged so as to expand and contract in the lateral direction. Therefore, if an attempt is made to apply a force in an oblique direction, an operation of stretching the lateral direction and then pulling it up in the vertical direction is required. Distortion tends to occur at any point. On the other hand, in the configuration of the diaper 1, since the belt portion 32 faces obliquely upward in the natural state, when the belt portion 32 is grasped and pulled up, the force is likely to be applied diagonally, and the force is locally applied even when pulled up diagonally. The force is easily transmitted to the entire area of the absorbent main body 10 on the extension line of the belt portion 32 without concentrating on the belt. That is, since the elastic force by the thread rubber 33 is transmitted to the absorbent main body 10 that is difficult to extend, it is easy to pull up the portion that is difficult to extend. Furthermore, since the both ends in the lateral direction of the belt portion 32, which is a portion that can be gripped by hand when the diaper 1 is worn, are also slanted (from the positional relationship between the upper end 32euu and the lower end 32eod), the belt portion 32 can be pulled up more easily.

  Since general underwear is made of a material that easily stretches in the vertical and horizontal directions (for example, polyurethane elastic fibers), if the belt part of the diaper does not have sufficient stretchability, When wearing underwear on top of one another, it is difficult to wear both together because the expansion and contraction of the belt cannot follow the expansion and contraction of the underwear. Further, in a general disposable diaper, the belt portion does not face in an oblique direction in a natural state, and a joining portion that joins the absorbent main body and the belt portion also does not face in an oblique direction. Therefore, the force for extending the belt portion is easily transmitted in the horizontal direction, but is not easily transmitted in the vertical direction, and is not easily interlocked with the force of the underwear.

  On the other hand, in the diaper 1 of the present embodiment, the joint portions jf and jb are formed obliquely, the belt portion 32 is oriented obliquely in a natural state, and the lateral end portion of the belt portion 32 is also obliquely formed. Because it is facing, the force tends to be applied in an oblique direction. Accordingly, the force to be raised obliquely when the underwear that can be stretched in both the vertical direction and the horizontal direction is extended easily works with the belt portion 32, and as a result, the diaper 1 can be worn without deviating from the underwear. it can.

  Further, the minimum value of the width in the longitudinal direction of the belt portion 32 is set to h32 (see FIG. 7). That is, h32 is the minimum value of the distance between one end and the other end of the belt portion 32 in the vertical direction. In the diaper 1, this distance h32 is defined to be 50 mm or more and 100 mm or less (100 mm ≧ h32 ≧ 50 mm). By setting h32 to 100 mm or less, when the diaper 1 is worn on top of the underwear, the belt portion 32 is difficult to protrude from the side portion of the underwear. On the other hand, by setting h32 to be 50 mm or more, it is possible to ensure a sufficient contact area between the wearer's skin and the belt portion 32, and the belt portion due to the friction between the belt portion 32 and the wearer's skin. It becomes easy to suppress that 32 slips or curls and becomes thin. Moreover, since the length when the index finger and the thumb are spread when an adult grasps an object is about 100 mm, with such a size, an adult can easily grasp the belt portion 32 with one hand, The operation of pulling diagonally upward can be performed stably. Accordingly, it is possible to improve the fit of the belt portion 32 and make it difficult to protrude from under the underwear.

  After the belt portion 32 is pulled obliquely upward, the abdominal end portion 10eLf and the back end portion 10eLb (not shown in FIG. 5) of the absorbent main body 10 are moved upward as shown by the thick solid arrows in FIG. The operation of fitting the absorbent body 11 to the crotch portion is performed. In this pulling-up operation, the upper end (edge) portion of the end portion 10eLf (10eLb) of the absorbent main body 10 is often gripped and pulled, but if the diaper is formed of a flexible material such as a nonwoven fabric, There is a case where the portion that has been stretched. In particular, since the diaper 1 of this embodiment is assumed to be worn under the underwear, if the end portion 10eLf (10eLb) is extended, the extended portion may protrude from the underwear. . Moreover, when the nonwoven fabric is stretched, the absorbent body 11 cannot be pulled up firmly, and the fit may be deteriorated.

  On the other hand, in the diaper 1, in the longitudinal end portion 10eLf (10eLb) of the absorbent main body 10, a predetermined number of sheet members are stacked to increase the strength, thereby making it difficult to extend the region. Specifically, as shown in FIG. 4, the absorbent main body 10 is configured to have a laminated structure of at least three layers at the end 10 eLf. For example, in the region 10 uf above the upper end 14 eLf of the back sheet 14 (non-skin side film) in the vertical direction, the top sheet 12 (skin side nonwoven fabric), the exterior sheet 16 (exterior nonwoven fabric), and the hydrophobic sheet 50 are formed. It has three layers. Further, in the region 10mf between the upper end 14eLf of the back sheet 14 and the upper end 11eLf of the absorber 11 in the vertical direction, in addition to the above three layers, there are four layers including the back sheet 14 (non-skin side film). Therefore, the strength is higher. In addition, other non-woven fabrics may be laminated.

  FIG. 8 is a diagram showing the results of testing the tensile strength of diapers. In FIG. 8, the diaper 1 of this embodiment and two types of ready-made diapers (conventional products) formed of nonwoven fabric are designated as sample 1 and sample 2, and the end region (region) in the longitudinal direction of the absorbent main body 10 is shown. This represents the relationship between the load and elongation when the region corresponding to 10 uf is pulled upward in the vertical direction.

  Sample 1 and Sample 2 are disposable diapers each having a belt member continuous in the lateral direction and having two or less sheet members stacked in a region corresponding to the end 10eLf (region 10uf in diaper 1). More specifically, in the sample 1, an elastic member (thread rubber) that exhibits stretchability in the lateral direction is disposed along the lateral direction, and the elastic member is a central portion in the lateral direction (a portion corresponding to the region 10uf). ) Have discontinuous portions. And in the said discontinuous part, between the two nonwoven fabrics laminated | stacked on both sides of the elastic member is non-joining. On the other hand, in sample 2, elastic members (thread rubbers) that exhibit lateral elasticity are continuously arranged along the horizontal direction, and the two nonwoven fabrics arranged with the elastic members sandwiched between them are elastic members. Are joined at the center in the horizontal direction (portion corresponding to the region 10uf).

  About such a sample 1, sample 2, and the diaper 1, the area | region corresponded to the area | region 10uf was grasped with the tension test machine, and it pulled, and the amount of elongation when the load was increased was measured. That is, in the sample 1, a tensile test is performed on a portion where the two sheet members are not joined, and in the sample 2, a tensile test is performed on a portion where the two sheet members are intermittently joined. In the direction), a tensile test was performed on the portion where the three sheet members were joined. As a result, the amount of elongation increased as the load increased. In sample 1, the amount of elongation at a load of 50 N was about 7 mm, and the load at the limit of elongation was about 70 N, and accurate measurement after that was difficult. It was. Next, in sample 2, the amount of elongation at a load of 50 N was about 16 mm, and the load at the limit of elongation was about 100 N, and accurate measurement after that was difficult. On the other hand, in the diaper 1 of the present embodiment, the elongation at a load of 50 N was 1 mm or less, the elongation at a load of 100 N was about 2 mm, and the load at the limit of elongation was about 300 N.

  As described above, the diaper 1 has a laminated structure in which at least three or more layers of sheet members are joined to each other at the end portion 10eLf (10eLb) of the absorbent main body 10, whereby the strength of the end portion 10eLf (10eLb) is different from that of the conventional product. It was found that the structure was extremely high and difficult to stretch against tension. Therefore, even when the region 10uf is pulled upward when the diaper 1 is worn, the region is prevented from extending, and the absorbent main body 10 hardly protrudes from the underwear. Good fit can be achieved by pulling firmly.

  In the diaper 1, the length L10uf of the region 10uf in the vertical direction is set to 20 mm or more. That is, in the longitudinal direction, the length of the region in which three or more layers of the sheet member are laminated above the upper end 14eLf of the back sheet 14 (non-skin side film) in the absorbent main body 10 is set to 20 mm or more. (L10uf ≧ 20 mm). As indicated by the hatched portion in FIG. 7, the region 10uf is a region sandwiched between the upper end of the absorbent main body 10 and the pair of front side joints jf and jf, and the wearer can wear the absorbent main body when the diaper 1 is worn. This is an area that is easily grasped by a finger when pulling 10. Therefore, by making the region into a three-layer structure, it is possible to facilitate the operation of the wearer pulling up the absorbent main body 10 by making the region of a size that is easy to grasp while securing sufficient strength. In addition, although the front-end | tip protrusion part 10s mentioned above is provided in the upper end of the vertical direction of the absorptive main body 10, in this embodiment, the length of the part except the front-end | tip protrusion part 10s is 20 mm or more in area | region 10uf. (See FIG. 7).

  In addition, the length L10s in which the leading end protruding portion 10s protrudes above the upper end of the front joint portion jf (rear side joint portion jb) (that is, the upper end position of the belt portion 32) in the vertical direction is 1 mm or more and 5 mm or less. Yes (5mm ≧ L10s ≧ 1mm). When L10 is shorter than 1 mm, it is difficult to visually recognize the tip protrusion 10s itself, and it is difficult to recognize the center position of the diaper 1 in the lateral direction. On the other hand, if L10 is longer than 5 mm, the tip protruding portion 10s is bent or bent, and the function as a mark indicating the center position in the lateral direction cannot be exhibited. Moreover, when L10 becomes long, there exists a possibility that the front-end | tip protrusion part 10s may protrude from underwear. In contrast, by setting 5 mm ≧ L10s ≧ 1 mm, it is possible to easily recognize the center position in the lateral direction without protruding from the underwear.

  Further, the length L10uf in the vertical direction of the region 10uf of the absorbent main body 10 is longer than the length L32eW1 in the vertical direction of the portion where the upper end portion 32eW1 of the belt portion 32 is folded back (the above-described end portion folded structure). long. Thereby, the force by which the region 10uf of the absorbent main body 10 is pulled upward is easily transmitted to the upper end portion 32eW1 of the belt portion 32 via the front side joint portions jf and jf. That is, the entire region in the longitudinal direction of the upper end portion 32eW1 of the belt portion 32 is easily pulled upward together with the region 10uf of the absorbent main body 10. Therefore, it is possible to adjust the entire position (height) of the waistline opening BH including the belt portion 32 by performing an operation of pulling up the upper end portion 10eLf of the absorbent main body 10. This improves the fit of the diaper 1 and makes it difficult for the waistline opening BH of the diaper 1 to protrude from the underwear.

  Moreover, when the diaper 1 is viewed from the lateral direction, the upper end region 10uf on the abdomen side of the absorbent main body 10 and the upper end region 10ub of the absorbent main body 10 are each formed with a ridge protruding in the thickness direction. The This is because the belt portion 32 of the waist opening BH is stretched by the rubber thread 33 along the longitudinal direction, whereas the upper end regions 10uf and 10ub of the absorbent main body 10 are stretched and contracted. This is because sex is not acting. That is, the elastic belt portions 32 are arranged on both lateral sides of the regions 10uf and 10ub, and are obliquely pulled from both sides via the joint portions jf and jf, thereby distorting the planar shape of the end regions 10uf and 10ub. Is likely to occur, and wrinkles are likely to be formed by the distortion. The size of the wrinkles varies depending on the inclination angles of the joint portions jf and jb and the lengths L10uf and L10ub in the vertical direction of the regions 10uf and 10ub. In this embodiment, the ventral end 10eLf of the absorbent main body 10 is used. The maximum value of the height in the thickness direction of the heel formed at the lower end is smaller than the maximum value of the height in the thickness direction of the heel formed at the ventral end 10eLf. Thereby, when the diaper 1 is worn under the underwear, the underwear is excessively lifted to the non-skin side in the thickness direction on the abdomen due to the influence of the wrinkle, or the diaper 1 is worn under the underwear. Stickiness is suppressed, and good fit is easily obtained. Moreover, by making the heel small on the ventral side, it is difficult to notice that the diaper 1 is worn under the underwear.

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

  In the above-described embodiment, so-called three-dimensional gathers for preventing side leakage are not provided at the positions on both sides in the lateral direction of the absorbent main body 10 in the unfolded state of FIG. 3A, but may be provided depending on circumstances. However, desirably, it is better not to provide a three-dimensional gather as in the above-described embodiment. Details are as follows.

  First, in order to provide a three-dimensional gather, a pair of three-dimensional gather sheets fixed in a state where elastic members such as rubber thread along the longitudinal direction are extended in the same direction are provided on both sides of the absorbent main body 10 in the lateral direction. Fix each one. Moreover, about the part inside a horizontal direction rather than the part fixed to the absorptive main body 10 in the same three-dimensional gather sheet, the both ends of the longitudinal direction are also fixed to the absorptive main body 10. And thereby, the center part of the longitudinal direction which is not fixed to the absorptive main body 10 in the same inner part stands up based on the contraction force of said elastic member, and, thereby, the said center part functions as a three-dimensional gather. . However, since the fixed both end portions are raised on the skin side, they are easily rubbed with the wearer's buttocks and the like, and as a result, the feeling of wearing is lost. In addition, the appearance of diapers is recalled. Therefore, it is preferable that a three-dimensional gather is not provided.

  In the above-described embodiment, the sectional shape of the front joint jf and the vicinity thereof has not been described. Therefore, it demonstrates here with reference to FIG. 9A and 9B. 9A is a cross-sectional view taken along the line DD in FIG. FIG. 9B is a cross-sectional view taken along line EE in FIG. That is, FIG. 9A shows a cross section of both end portions (near the waistline opening BH and the leg hole opening LH) in the vertical direction of the front side joint jf, and FIG. 9B shows the vicinity of the middle portion in the vertical direction of the front side joint jf. A cross section is shown. As shown in FIGS. 9A and 9B, the front joint jf is formed so as to protrude on the front side (non-skin side) in the front-rear direction. And since the hydrophobic sheet | seat 50 exists in the non-skin side of the absorptive main body 10 of the front side junction part jf, based on the rigidity of the sheet | seat 50, the boundary part of the absorptive main body 10 and the front side junction part jf The front joint jf is in a state of being tilted outward in the lateral direction so that the angle θ1 becomes an obtuse angle and the angle θ2 of the boundary portion between the belt portion 32 and the front joint jf becomes an acute angle.

  Further, a dry edge jde where the belt portion 32 and the absorbent main body 10 are not joined is provided at the outer edge portion of the front joint portion jf. The width of the dry edge jde (that is, the length of the portion protruding to the non-skin side from the portion where the belt portion 32 and the absorbent main body 10 are joined) is the shortest at both ends in the vertical direction. It is the longest in the center of the direction. The dry edge jde is a predetermined distance from the edge of the front joint jf when the absorbent main body 10 and the belt 32 stacked in the thickness direction are cut along the front joint jf in the manufacturing process of the diaper 1. It is formed by cutting a position separated by only a distance. At this time, in order to prevent the front joint jf itself from being cut, the dry edge jde is formed as large (long as possible) by cutting a position somewhat away from the edge of the front joint jf. It is common. However, since the diaper 1 of the present embodiment is supposed to be worn under the underwear, if the dry edge jde is too large, the diaper 1 easily interferes with the underwear. In particular, if the dry edge jde is large in the vicinity of the waistline opening BH or the leghole opening LH, it may be a factor that causes a sense of incongruity in the waistline or around the legs by being fastened to the underwear when worn. Therefore, in the diaper 1, the dry edge jde is so narrow that the width of the dry edge jde at both longitudinal ends of the front joint jf is shorter than the width of the dry edge jde at the longitudinal center of the front joint jf. Is forming. Thereby, when the diaper 1 is worn, it is possible to make it difficult for the wearer to feel discomfort about the waist and legs. The same applies to the rear joint jb.

1 disposable diapers (absorbent articles),
10 Absorbent body, 10 eLb end, 10 eLf end, 10 eW end,
10 uf region, 10 ub region, 10 mf region,
10s tip protrusion,
11 absorber, 11eW end, 11eLf upper end,
12 Top sheet (non-woven fabric on the skin side),
14 Back sheet (non-skin side film), 14eLf upper end, 14eLb upper end,
16 exterior sheet (exterior nonwoven fabric),
17 Groove,
171 1st groove part, 172 2nd groove part, 173 3rd groove part,
30 sheet member (sheet), 30a sheet, 30eW end,
32 belt part, 32eLb end part, 32eLf end part, 32eW1 end part,
32eou belt upper end, 32eod belt lower end,
33 Rubber thread,
37 leg gathers, 37eLb end, 37eLf end,
38 Rubber thread,
50 hydrophobic sheet,
BH waistline opening, LH leg opening,
FL fold line, jb rear junction (joint), jf front junction (joint),
jde dry edge,
CLL10 approximate center position

Claims (13)

A pants-type diaper having a longitudinal direction and a lateral direction intersecting each other, forming a waistline opening and a pair of leg openings, and worn under an underwear,
  Absorber that absorbs excretory fluid, liquid-permeable skin-side nonwoven fabric disposed on the skin side of the absorber, and liquid-impermeable non-skin-side film disposed on the non-skin side of the absorber And an absorbent non-woven fabric disposed on the non-skin side of the non-skin side film, and an absorbent main body,
  A belt portion arranged on each side of the transverse direction and connecting each end portion in the longitudinal direction of the absorbent main body;
Have
  The belt part is joined to the absorptive body at two pairs of joints inclined downward in the longitudinal direction and outward in the lateral direction from the waistline opening toward the leghole opening. ,
  The minimum value of the distance between the one end and the other end of the belt portion in the longitudinal direction is 50 mm or more and 100 mm or less,
  The underpants type diaper, wherein the belt part and the crotch part of the absorbent main body are sized to be adjusted to a position hidden in the underwear after wearing the underwear. The pants-type diaper according to claim 1,
A pant-type diaper having a liquid-impermeable hydrophobic sheet disposed on the skin side of the skin-side nonwoven fabric. The pants-type diaper according to claim 1 or 2,
The underpants type characterized in that when the region above the upper end of the non-skin side film in the absorbent main body is pulled upward in the longitudinal direction with a force of 50 N, the stretch amount is 1.0 mm or less. Diapers. The pants-type diaper according to any one of claims 1 to 3,
The underpants type diaper characterized in that the length in the longitudinal direction of the region above the upper end of the non-skin side film in the absorbent main body is 20 mm or more. The pants-type diaper according to claim 4,
The belt portion has an end-end structure in which an upper end portion is folded back in the longitudinal direction,
Of the absorbent main body, the length in the vertical direction of the region above the upper end of the non-skin side film is:
The underpants type diaper characterized by being shorter than the length in the said longitudinal direction of the part which has the said end part closing structure among the said belt parts. The pants-type diaper according to any one of claims 1 to 5,
On the ventral side of the absorbent main body, the maximum value of the height of wrinkles formed in the region above the upper end of the non-skin side film in the longitudinal direction is
The underpants type diaper characterized by being smaller than the maximum value of the height of the heel formed in the region above the upper end of the non-skin side film in the longitudinal direction on the back side of the absorbent main body. The pants-type diaper according to any one of claims 1 to 6,
The underpants type diaper characterized by having a front-end protruding portion that protrudes upward in the vertical direction at the upper end in the vertical direction and at the center in the horizontal direction on the ventral side and the back side of the absorbent main body. The pants-type diaper according to claim 7,
The length by which the said front-end | tip protrusion part protrudes above the upper end of the said junction part in the said vertical direction is 1 mm or more and 5 mm or less, The underpants type diaper characterized by the above-mentioned. The pants-type diaper according to any one of claims 1 to 8,
The belt portion has a plurality of elastic members that expand and contract along the longitudinal direction of the belt portion,
The pants-type diaper, wherein the elastic member is continuously arranged from one end to the other end in the longitudinal direction of the belt portion. The pants-type diaper according to any one of claims 1 to 9,
The joint part is provided to stand on the non-skin side, and the non-skin side end edge part has a dry edge where the absorbent main body and the belt part are not joined,
The width | variety of the said dry edge in the both ends of the longitudinal direction of the said junction part is shorter than the width | variety of the said dry edge in the center part of the longitudinal direction of the said junction part, The underpants type diaper characterized by the above-mentioned. The pants-type diaper according to any one of claims 1 to 10,
In the natural state, the position of the laterally outer end and the longitudinal upper end of the belt portion is above the longitudinal end relative to the upper end of the absorbent main body. Diapers. The pants-type diaper according to claim 11,
In the natural state, the lateral end of the belt portion and the position of the longitudinal lower end are
The underpants-type diaper characterized by being outside in the lateral direction than the position of the laterally outer end and the longitudinal upper end of the belt portion. It has a vertical direction and a horizontal direction intersecting with each other, and a waistline opening and a pair of leg openings are formed,
Absorber that absorbs excretory fluid, liquid-permeable skin-side nonwoven fabric disposed on the skin side of the absorber, and liquid-impermeable non-skin-side film disposed on the non-skin side of the absorber And an absorbent non-woven fabric disposed on the non-skin side of the non-skin side film, and an absorbent main body,
Arranged on both sides in the transverse direction, connecting the respective ends in the longitudinal direction of the absorbent main body, from the waistline opening toward the leghole opening, on the lower side in the longitudinal direction and in the lateral direction A belt portion joined to the absorbent main body at two pairs of joints inclined outward;
A pants-type diaper wearing method comprising: placing the pants-type diaper on the skin side of underwear; and
After passing the legs of the wearer through the leg opening of the pants-type diaper and the underwear, the belt portion is pulled up obliquely upward together with the side portion of the underwear;
On the ventral side and the back side, together with the upper end portion in the longitudinal direction of the underwear, pulling up the upper end portion in the longitudinal direction of the absorbent main body upward,
A method for wearing a pant-type diaper having a garment.

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