JP5535017B2 - Pants-type wearing article - Google Patents

Description

  The present invention relates to a pants-type wearing article.

  There are a pant-type diaper or a diaper cover, which is not an unfolded type, in which a waist opening and a pair of leg openings are defined in advance as in brief pants. Such a pant-type diaper or the like usually has a linear side seam portion extending in the height direction on the left and right sides of the wearer's waist, and the abdomen and back sides of the exterior body are joined at the side seam portion. . And after use, instead of lowering the brief pants to the tip of the foot, the side seam portions on the left and right sides of the wearer described above are broken and removed. Diapers can be discarded as they are. In this way, for example, when a care recipient such as an infant or an elderly person defecates, the diaper is broken open without being dragged from the thigh to the tip of the foot and left standing. It can be pulled away from the crotch while lying on its back or removed.

Some diapers have been devised for good tearing of the side seam portion of the pants-type diaper. For example, there is one in which a second joint portion parallel to the side seam portion is formed at a position spaced inward from the side seam portion (see Patent Document 1). It is said that the tearing can be prevented from deviating in the width direction along the fiber orientation of the sheet material of the diaper in the middle of trying to tear in the vertical direction by having the second joining portion. .
Moreover, in a pants-type diaper, there is a pants-type diaper in which a band material is arranged in a waistline direction that covers an end portion of an absorber on the skin surface side of an exterior sheet (see Patent Document 2). This strip has a length in the height direction shorter than that of the side seam portion, and is partially sandwiched and joined with the exterior sheet at a position below the upper end of the side seam portion. In this diaper, an incision extending in the height direction is provided in the vicinity of the side seam portion of the strip. Therefore, even if the side seam band is reached in the middle of tearing, the entire top and bottom direction is torn from the upper end edge to the lower end edge including the joint portion with the exterior sheet as it is at the cut portion of the band body.

JP 2000-14697 A JP 2010-136787 A

By the way, according to the present inventors' confirmation, in a diaper having an inner sheet member in which the exterior sheet is folded back to the skin surface side, when the side seam portion is broken and peeled off, the inner sheet member There is a case where the belt-like non-adhesive belt located at the lower end (dry edge portion not joined to the exterior sheet) does not break well. In particular, when the wearer is an older infant or the like, it often does not stay still when changing diapers. For this reason, parents or the like may not be able to break well while trying to break the side seam portion somewhat violently quickly while controlling this movement. Specifically, as shown in FIG. 6, by pulling the ventral member 3a in the vicinity of the side seam portion 3 from the waist opening of the diaper to the front side and the back side member 3b to the rear side, the side seam portion 3 is moved vertically. torn as you, the bonding area 22a along the adhesive interface w ₁ in the waistline direction 'and 22b' without strip non-adhesive zone 21a 'and 21b' of the inner sheet member being separated well on the side seams separation (w ₂ ) And then tears into a string.

  In view of the above points, an object of the present invention is to provide a pants-type wearing article that can replace a non-adhesive band and avoid a lateral tear of a band-shaped non-adhesive band when the side seam portion is broken.

  The present invention is a pants-type wearing article having a waist opening and a pair of undercarriage openings, wherein the pants-type wearing article includes a member constituting the stomach side and a member constituting the back side. There is a pair of left and right side seam portions superimposed in a state, and an inner sheet member covering the waist or abdomen of the wearer is joined to the skin surface side of the abdominal member and / or the dorsal member, There is a waistline non-adhesive band that is non-adhered to the abdominal member and / or the back member in the lower end region of the height direction of the wearer of the inner sheet member, and the inner sheet member having the belt-shaped non-adhesive band Bonded at the side seam portion, and the band-shaped non-adhesive band is formed by the pants-type wearing article having a breakage induction structure that induces a break in the height direction in at least one of right and left in the vicinity of the side seam portion. It is intended to solve the problem.

  The pants-type wearing article of the present invention has an excellent effect of avoiding the lateral tearing of the non-adhesive band when the side seam portion is broken and enabling good diaper replacement.

It is the perspective view which showed typically the underpants type disposable diaper as one embodiment in the underpants type wearing article of the present invention as a shape of a wearing state from a ventral side. It is the perspective view which showed typically the periphery of the area | region II shown in FIG. 1 seeing from the diaper inner side. It is an expanded sectional view of the III-III line cross section shown in FIG. (A) is the expanded sectional view which expanded and expanded the cross section of IV cut surface of the side seam part shown in FIG. 2, and (b) and (c) are the tears in the side seam part cross section. It is the expanded sectional view which showed the mode typically. It is the perspective view which showed typically the state when tearing the side seam part (part corresponding to the part shown in FIG. 2) of the disposable diaper as embodiment. It is the perspective view which showed typically the state when tearing the side seam part of the conventional diaper seeing from the inner side of a diaper.

FIG. 1 is a perspective view schematically showing a pant-type disposable diaper 10 as an embodiment of the pant-type wearing article of the present invention as viewed from the ventral side as a generally worn shape. FIG. 2 is a perspective view schematically showing the periphery of the region II shown in FIG. 1 as viewed from the inside of the diaper.
The diaper 10 of this embodiment has a waist opening 11 and a pair of leg openings 12, and extends from the waist opening 11 to the leg opening 12 on both the left and right sides of the diaper, with the length direction of the wearer as the longitudinal direction. It has a seam part 3. “Seam” means a joint, and includes a form with continuous joints and a form in which a plurality of joints and non-joints are arranged intermittently. And in this side seam part 3, the left-right both-sides edge part of the abdominal part 1a of the exterior sheet | seat 1 which makes the external shape of a diaper, and the back | dorsal part 1b are each overlapped and joined in the palm state (refer FIG. 2). ). Here, overlapping in the shape of a palm means that the surfaces having the same function in a pair of sheet materials, that is, in the exterior sheet 1 of the present embodiment, the skin contact surfaces face each other and contact each other. Another functional sheet material or member may be interposed between the two sheet materials. In the present embodiment, the exterior sheet 1 is made of an integral sheet material in which an abdomen portion 1a and a back portion 1b are continuous via a crotch portion 1c (a member portion corresponding to the crotch portion C in the diaper of FIG. 1). However, the abdominal part 1a, the back part 1b, and the crotch part 1c are made of different sheet materials and joined at predetermined positions, or are made of only the sheet material separated into the abdominal part 1a and the back part 1b. Or may be configured in combination with another functional member or the like.

  In the present invention, unless otherwise specified, the direction along the height of the wearer in the standing position is the height direction of the pant-type wearing article, and the direction along the wearer's waist is defined as the waist direction of the pant-type wearing article. To do. Moreover, the surface on the side in contact with the human body is referred to as the skin side surface or skin contact surface or surface, and the surface on the opposite side is referred to as the non-skin surface or non-skin contact surface or back surface. Of these two surfaces, the side close to the skin side or the extending direction is called the skin side, the skin contact surface side or the surface side, and the side close to the non-skin surface or the extending direction is the non-skin side, non-skin It is called the contact side or the back side. The direction positioned on the front side of the human body when the worn article is mounted is referred to as the front, and the end thereof is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end.

  In the illustrated example, the exterior sheet 1 is shown as a single sheet material in consideration of the visibility of the main part. However, in the present embodiment, the exterior sheet 1 is a wearer skin surface side (hereinafter simply referred to as “ One or more inner layers of liquid impervious (also referred to as “skin side” or “skin side”) and the wearer's non-skin side (“also simply referred to as“ non-skin side ”or“ non-skin side ””) The outer layer non-woven fabric. A predetermined member such as a string-like elastic member (not shown) is interposed between the inner layer sheet and the outer layer nonwoven fabric. Specifically, a waist elastic member and a waistline elastic member extending in the direction of the waistline are arranged at the edge near the waist opening 11 and the center of the waistline region D (not shown). Due to the elastic members arranged around the waist, the wearer's waist is moderately tightened to provide a good fit. In addition, a string-like leg elastic member is also interposed and disposed in the vicinity of the edge of the leg opening 12 (not shown), and the wearer's foot base is appropriately tightened to ensure good wearability and Demonstrates the ability to prevent leakage of liquid from the part.

  The skin surface side of the exterior sheet 1 is composed of pulp fibers, absorbent polymers, and the like stacked on a liquid-permeable fiber sheet (liquid-permeable surface sheet or paper mount) (not shown). An absorbent main body 4 in which an absorbent core (not shown) is encased is disposed. A method for attaching the absorbent main body 4 to the exterior sheet 1 is not particularly limited. For example, the hot melt adhesive can be applied and bonded in a planar shape, a linear shape, or a spiral shape. In the disposable diaper 10 of the present embodiment, the absorbent main body 4 has an hourglass shape with a central portion constricted, and the exterior sheet 1 disassembled and developed by the side seam portion 3 is also adapted to the outer shape of the absorbent main body 4. It has a large hourglass shape. Further, the exterior sheet 1 includes outer sides of the front and rear side edges in the longitudinal direction of the absorbent main body 4 (the wearer's head direction) and outer sides of the left and right side edges in the width direction of the absorbent body 4 (the left and right sides of the wearer). It has a side edge portion (flap portion) extending in the (part direction). The left and right end portions of the left and right or front and rear side edges are joined to form the side seam portion 3 as described above. Such a configuration is the same as a normal pants-type disposable diaper.

  In the pants-type disposable diaper 10 according to the present embodiment, a pair of inner sheet members 2, 2 (on the skin side of the belly side portion 1 a and the back side portion 1 b of the outer sheet 1) An inner sheet member 2a disposed on the stomach side and an inner sheet member 2b disposed on the back side are disposed (see FIGS. 1 and 2). In the present embodiment, the inner sheet members 2a and 2b are facing portions where the abdomen side portion 1a and the extended portion of the back portion 1b of the exterior sheet 1 are folded and joined to the skin surface side at the respective waist opening ends 1t. The height direction length reaches the longitudinal end of the absorbent main body 4. On the other hand, with respect to the waistline direction of the inner sheet members 2a and 2b, the length thereof coincides with that of the abdomen portion 1a and the back portion 1b of the exterior sheet 1, and the end portions 3r and 3r of the side seam portions 3 and 3 are aligned. (See FIG. 2). Thus, the inner sheet member 2 covers the longitudinal end of the absorbent main body 4 from the skin surface side as a turning portion of the diaper, so that the absorbent main body 4 does not directly contact the skin, A soft touch is born.

  In the present embodiment, the lower ends of the inner sheet members 2a and 2b in the height direction are band-shaped so that the band-shaped non-adhesive bands 21a and 21b that are not bonded to the absorbent main body 4 and the exterior sheet 1 extend in the waistline direction as free ends. It is arranged. The band-shaped non-adhesive band 21a is sandwiched and bonded between the exterior sheets 1a and 1b of the side seam portion 1 at both right and left ends. In the present embodiment, the length in the height direction of the band-shaped non-adhesive band 21b is shorter than that of the band-shaped non-adhesive band 21a (see FIG. 2). The inner sheet member 21a on the abdomen side and the inner sheet member 21b on the back side are firmly bonded and fixed to the exterior sheet 1 and the like by an adhesive or the like in the bonding regions 22a and 22b above the band-shaped non-adhesive bands 21a and 21b. (See FIG. 2).

  In the present embodiment, as a feature thereof, in the vicinity of the inner edge of the side seam portion 3 of the band-shaped non-adhesive bands 21a and 21b, a cut 23 as a breakage induction structure is the length in the height direction of each of the band-shaped non-adhesive bands 21a and 21b. (See FIG. 2). As will be described in detail later, this breakage guiding structure functions to prevent lateral tearing of the band-shaped non-adhesive bands 21a and 21b when the side seam portion 3 is torn. Accordingly, the side seam portion can be favorably broken while maintaining the adhesive strength between the adhesive regions 22 a and 22 b of the inner sheet member 2 and the exterior sheet 1.

  Here, with reference to FIG.3 and FIG.4, the arrangement | positioning of the structural member of the side seam part 3 containing the said strip | belt-shaped non-adhesion belt | band | zone 21, and its assembly form are demonstrated. FIG. 3 is an enlarged cross-sectional view taken along line III-III shown in FIG. 4 (a) is an enlarged cross-sectional view schematically showing an enlarged cross section of the IV cut surface of the side seam portion shown in FIG. 2, and (b) and (c) are cross-sectional views of the side seam portion. It is the expanded sectional view which showed the mode of tearing typically. 3 and 4, only one of the pair of side seam portions 3 and 3 is shown, but the member arrangement and the assembled form are the same in the other. In the side seam portion 3 of the present embodiment, when seen from the cross section in the waistline direction including the band-shaped non-adhesive bands 21a and 21b, the exterior sheet stomach side portion 1a and the stomach side inner sheet member are viewed from the right side in FIG. 2a, a back side inner sheet member 2b, and an exterior sheet back side portion 1b in that order, and has a four-layer structure (if the exterior sheet 1 is viewed as a two-layer structure of an inner layer sheet and an outer layer nonwoven fabric, it can be said to be a six-layer structure. ), These are joined together. In addition, cuts 23 are arranged in the vicinity of the inner side edge 3s of the side seam portion 3 in the band-shaped non-adhesive band 21a of the inner sheet member 2a and 21b of the inner sheet member 2b. FIG. 4 is a deformation model for clearly showing the tearing state of the member, and the form thereof is not necessarily matched with FIGS. Also, the tearing behavior is shown from the outer side o toward the inner side q, and does not merely indicate that the actual tearing change is as shown in this figure.

  In this embodiment, when the cross section in the height direction of the side seam portion 3 is viewed, as shown in FIG. 4A, the four-layer structure is formed from the upper end edge 3 i of the side seam portion 3 to the lower end edge of the inner sheet member 2. It is formed up to 2k. Up to the lower end edge 3k of the side seam portion 3 below is a two-layer structure of an exterior sheet belly side portion 1a and an exterior sheet back side portion 1b. The four-layer structure and the two-layer structure are firmly joined at the joint portion m so as to form a series of side seam portions 3. As a joining method of this joining part m, the method used for this kind of article can be adopted, for example, a method of fusing by heat sealing, high-frequency sealing, ultrasonic sealing, or the like. Moreover, this junction part m can be made into the form which continuously joined on the whole surface, or the form which arranged the some junction part and the non-joining part in pattern arrangement, for example. Specifically, for example, a four-layer or two-layer sheet member serving as a side seam portion is sandwiched between an embossing roll and a flat roll and heated and pressed, and the embossing roll has a convex surface. With this, the pattern of the joint can be arranged.

On the other hand, in the four-layer structure of the side seams 3, the bonding area 22a of the exterior sheet 1a and the inner sheet members 2a are joined by the joining portion n _1, and a bonding area 22b of the exterior sheet 1b and the inner sheet member 2b are joined by a joining portion _{n 2} (see Figure 4 (a)). These joint portions n ₁ and n ₂ are end portions where the inner sheet member 2 is bonded to the exterior sheet 1 before the side seam portion 3 is formed, and are joint portions using an adhesive or the like. On the other hand, the joint portions n ₃ and n ₄ are portions where the band-shaped non-adhesive bands 21a and 21b as the free ends and the exterior sheet 1 are laminated, and there is no application of an adhesive or the like. It is a weakly joined part or a non-adhesive part that are crimped together. The joint strengths (P ¹ _r and P ² _r ) of the joint portions n ₃ and n ₄ are weaker than the adhesive strength (P ³ _r ) of the joint portion m in which the side seam portion 3 is firmly bonded and fixed. (P ¹ _r and P ² _r <P ³ _r ). Moreover, the band-shaped non-adhesive band 21 remains a free end from the inner edge 3s of the side seam portion 3 toward the waistline direction (see FIG. 2).

In the side seam portion 3 having such a joint, the force to tear the side seams 3 (G) vigorously added, proceeds with its tear the tear direction s ₁ to below the upper edge 3i, be well junction m is peeled until the middle (see FIG. 4 (b)), the portion of the strip-shaped non-adhesive zone 21, a weak junction n ₃ and n ₄ is the order of the bonding strength remains junctions m 'is adhered It has been peeled off (see FIG. 4C). As the joint surfaces n ₃ and n ₄ are peeled off, the strip-shaped non-adhesive strips 21 a and 21 b tend to be pulled around the trunk while being connected by the joint portion m. However, in the present embodiment, as described above, in the vicinity of the side seam portion 3 of the band-shaped non-adhesive bands 21a and 21b, the cuts 23 as the breakage induction structure are arranged in accordance with the height direction (FIG. 2). 3), it is possible to effectively prevent tearing in the waist direction extending to the front side of FIG. This point is advanced from the lower edge 3k of the side seams 3 upward tearing direction s ₂ (see FIG. 1) is similar. The bonding portion n ₃ is easily peeled off before the junction n ₄ total length direction of the longer the joint portion n ₃ length than, in some cases may be only the junction n ₃ is peeled off. Further, in FIG. 6, the joint part n ₃ and the joint part n ₄ are shown to be peeled off from the boundary between the joint parts n ₁ and n ₂ , respectively, but depending on the magnitude, speed, and direction of the tearing force G, the peeled position may be. It may be different.

The fracture inducing structure is a structure that promotes the progress direction of tearing while tearing the side seam portions 3 and 3 back and forth in the direction s ₁ or s ₂ along the side seam portion. In other words, even if the tearing force is likely to spill in the waist direction, the rupture-inducing structure has the function of interrupting the spillover at that portion and directing the tearing direction to the height direction, thereby preventing unintended tearing of the member. A structure having From this point of view, the fracture induction structure is not limited to the notch 23 of the present embodiment as long as it has the above-described function. For example, the structure of the perforation extending in the height direction and the strength of the member of the band-shaped non-adhesive band 21 are weakened. The structure which makes the intensity | strength of a member discontinuous, such as the structure which consists of the part made to be, may be sufficient. By arranging such a structure, the tearing force G is cut off so as not to go around the waist, and the strain generated by the tearing force G appears as the tearing progress direction s ₁ or s _2. Good tearing of the seam part 3 is realized. Note that the fracture induction structure is disposed only in the band-shaped non-adhesive band 21 necessary for preventing lateral tearing, and is not disposed in the adhesion region 22 of the inner sheet member 2. Thereby, since joining of the adhesion | attachment area | region 22 and the exterior sheet | seat 1 is maintained, and the inner sheet | seat member 2 is not torn at this part, the member intensity at the time of diaper use is maintained as the inner sheet | seat part 2 whole.

This point will be described in more detail with reference to FIG. FIG. 5 is a perspective view schematically showing a state when a side seam portion (a portion corresponding to the portion shown in FIG. 2) of the disposable diaper as the embodiment is torn.
When tearing the side seam portion 3 so that the diaper 10 of the present embodiment is removed after use and discarded, force is applied to grip the both sides with the fingers T of a guardian or an assistant and move it in the direction of the arrow G. Then, gradually progress tear to tear direction s ₁ toward the side seams upper edge 3i of the waist opening portion side downward, the side seams 3 is divided into and the seams dorsal 3b seam ventral 3a To go. Then, Sashikakari the upper edge of the inner sheet member 2 of the strip-shaped non-adhesive zone 21a, the junction m instead junction n _3, n 4 _(see FIG. 4) is peeled off. When the strip non-adhesive zone 21a tries Hikisako further side seams 3 remains joined to the seam portion dorsal 3b, when you horizontal tearing to the total length direction boundary w ₁ of a strip non-adhesive zone 21a and bonding areas 22a . This peeling or lateral tearing is caused by the magnitude and momentum of the force that tears the side seam portion of the guardian, the body shape and movement of the wearer, the difference in the joint strength between the joints n ₃ and n ₄ and the joint m, etc. It is thought to be caused by various factors.
However, in this embodiment, the tearing force in the waistline direction is cut off at the portions of the cuts 23 and 23, and the strip-shaped non-adhesive bands 21a and 21b are not easily torn. Specifically, the stress due to tearing concentrates on the cut 23 extending in the height direction, and the strip-shaped non-adhesive bands 21a and 21b are torn along this. As a result, band-shaped non-adhesive band 21a and 21b without Hippareru in more waistline direction, extending direction of the tear force G changes from waistline direction to the vertical direction (S ₁ direction). As a result, the ventral band member 2a and the back band member 2b are smoothly divided. Incidentally, In FIG. 5 the state of rupture of this time, shown as the shape of the side seams 3 for ease of understanding moves is maintained, for example, ideally a virtual trajectory line q ₁ of the upper edge 3i It was shown to draw a circular arc, but in reality, due to the deformability of the sheet material, it gradually peeled from the inner side of the diaper of the side seam part, and the side seam part surface was slightly kinked outward and downward And will peel off. As described above, the arrangement of the breakage induction structure suppresses lateral tearing when the side seam portion is divided. Even if it is, good and reliable division is possible.

  In the present embodiment, at the time of this peeling, the inner sheet member 2 is prevented from tearing in the waistline direction, so that the deformation of the diaper in the waistline direction is suppressed, and the diaper is deformed and the internal member scraps. Things that come up are suppressed. In addition, since the strip-shaped piece of the band-shaped non-adhesive band 21 connected from the conventional ventral side to the dorsal side does not occur, the diaper can be easily removed without tearing many times, and the excrement etc. can be used as it is on the floor or the like. It can be discarded quickly without scattering. Such an action is due to the breakage induction structure created in the band-shaped non-adhesive band 21. The state in which the members are pulled apart by the breakage induction structure is actually that the sheet material is gradually twisted from the inside of the diaper to the outside and the tear from the top of the diaper to the bottom as shown in FIG. It will be.

  In the diaper 10 of the present embodiment, when the breakage guiding structure is the cut 23, the band-shaped non-adhesive band 21 is separated from the side seam portion 3. Therefore, even when a finger enters between the strip-shaped non-adhesive strip 21 and the exterior sheet 1 when the diaper is worn, the strip-shaped non-adhesive strip 21 is turned up so that the diaper can be pulled up smoothly without being caught by the finger. . Further, the two-layer structure of the inner sheet member 2 can be formed at the portion of the band-shaped non-adhesive band 21 turned up, and the softness is improved accordingly.

  In the present embodiment, from the viewpoint of sure prevention of lateral tearing, breakage induction structures are provided at a total of four locations on the left and right ends of the abdominal inner sheet member 2a and on the left and right ends of the back inner sheet member 2b. However, the present invention is not limited to this, and in the inner sheet member 2a on the side closer to the waist (see FIGS. 2 and 4), the band-shaped non-adhesive band is at least on the abdominal side and the back side. It is preferable that there are fracture induction structures at two places on the left and right sides of the belt 21a.

  In the present embodiment, from the viewpoint of effective prevention of lateral tearing, the separation distance (w) in the waist direction between the rupture induction structure and the inner edge 3s of the side seam portion 3 is preferably 30 mm or less, More preferably, it is 10 mm or less. By making it below the upper limit, transverse tearing can be minimized.

In the present embodiment, when the break induction structure is other than a notch, it is preferable that the strength of the member at that portion is discontinuous from the viewpoint of effectively exhibiting the function of the break induction structure. For example, the eyes may be damaged or the strength of the member may be weakened. The weakening of the strength of the member means a state in which the strength of the member is lowered. Specifically, there are a method of pre-cutting by applying a very strong pressure and a method of embossing. Even if the joint m (see FIG. 4) of the side seam portion 3 is not peeled off due to a strong and strong tearing force, the fracture inducing structure reliably cuts off the tearing progress in the waistline direction and changes it up and down. The strength (T ¹ ) of the member in the waist direction of the fracture induction structure is preferably 3 to 20 N / 30 mm, and more preferably 5 to 10 N / 30 mm. By setting it to the lower limit or more, breakage during wearing can be prevented, and by setting the upper limit or less, breakage can be induced when the side seam portion is torn.

In particular, in the case of a product in which the strength of the member when pulled in the waist direction is higher than the strength of the member when pulled in the body height direction, the strength (T ¹ ) of the member in the waist direction in the portion of the fracture induction structure Is preferably lower than the strength (T ² ) of the member in the height direction, and the ratio (T ¹ / T ² ) is preferably 0.3 to 0.9, and is preferably 0.5 to 0.7. More preferably it is. Further, from the viewpoint of preventing lateral tearing, the ratio (T ¹ / T ^s ) of the strength (T ¹ ) in the waist direction of the fracture-inducing structure to the strength (T ^s ) in the height direction of the inner sheet member is 0.3 to 0.9 is preferable, and 0.5 to 0.7 is more preferable. Due to such weakening of the strength of the member, tearing of the band-shaped non-adhesive band 21 and the bonding region 22 in the height direction immediately occurs in the waist direction in which the strength is relatively lower than the height direction in the portion of the breaking induction structure. It is torn and the tearing direction can change again in the up-down direction (S ₁ or S ₂ direction (see FIGS. 1 and 5)). Examples of the strength reduction of the member in the waistline direction include a method in which the emboss is along the height direction or the member is stretched in the waistline direction. On the other hand, the strength of the inner sheet member 2 is required so that it can withstand extension in the waistline direction when the diaper 10 is mounted or after use. Therefore, it is preferable that the breaking guide structure has a strength reduction of the sheet member that is not easily broken by a force during use but can be easily separated by a strong tearing force of the side seam portion. From this point of view, it is preferable because the strength of the fracture induction structure can be adjusted in a range of not less than the above-described lower limit and not more than the upper limit.

  Furthermore, it is preferable that the fracture inducing structure is disposed only on the band-shaped non-adhesive band 21. Thereby, since the separation of the inner sheet member 2 is stopped only at the portion of the belt-shaped non-adhesive band 21 of the fracture induction structure, the strength of the entire sheet member is maintained. Further, since the breakage induction structure is not present in the adhesion region 22, it is possible to avoid a decrease in bonding strength between the adhesion region 22 and the exterior sheet 1 and sheet peeling. Thereby, the favorable wearing feeling at the time of diaper use can be maintained. In addition, when the structure is due to weakening of the strength of the member, the width of the structure (length in the waistline direction) is preferably 1 to 10 mm from the viewpoint of being easily broken by a breakage induction structure when a lateral tear occurs, 2-5 mm is more preferable.

[Member strength]
In the present invention, “strength of the member” means a value measured as follows unless otherwise specified. First, the member is cut into an appropriate size to obtain a sample sheet. The obtained sample sheet is held between chucks of a Tensilon tensile tester (Orientec Co., Ltd., trade name “RTA-100”), then pulled at a pulling speed of 300 mm / min, and the maximum point load is measured when it breaks. To do. This is converted to a width of 30 mm and used as the strength of the member.

  As the nonwoven fabric used as the material for the outer layer nonwoven fabric of the exterior sheet and the fiber sheet that covers the absorbent body, for example, air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, nonwoven fabric by various production methods such as melt blown nonwoven fabric, Examples include woven fabrics, knitted fabrics, resin films, and the like, and a sheet material obtained by laminating and integrating them can be used. From the viewpoint of regularly arranging flexible ridges with good feel and giving a decorative aesthetic appearance, both sheet materials or one sheet material (especially skin when used for the purpose of bringing a composite elastic member into contact with the skin) The forming material of the sheet material forming the surface side) is preferably an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or the like.

As a material of the elastic member, a normal elastic material used for absorbent articles can be used. For example, as a material, synthetic rubber such as styrene-butadiene, butadiene, isoprene, neoprene, natural rubber, EVA, stretchable polyolefin Polyurethane and the like can be mentioned, and the form thereof is such that the cross-section is rectangular, square, circular, polygonal or other thread-like or string-like (flat rubber etc.), or multifilament type thread-like it can.
It is.

  In each of the above embodiments, a pants-type diaper is shown as an example of the wearing article of the present invention, but a pants-type diaper cover that is used with the absorbent main body disposed on the skin surface side is also preferable. The absorbent main body is not particularly limited as long as it absorbs excreted urine and the like, and examples thereof include an absorbent pad such as a urine collecting pad. The absorbent pad includes, for example, a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-holding absorber interposed between the two sheets, and is formed in a vertically long shape that is rectangular in plan view. Can be mentioned. Preferably, a pair of left and right solid guards are formed on both sides of the absorbent pad in the longitudinal direction, and each solid guard is for forming a solid guard having a solid guard elastic member on both sides of the absorbent pad in the longitudinal direction. It is preferable that the sheet material is disposed. The longitudinal direction of such an absorbent pad is passed from the wearer's back side to the stomach side through the crotch, and the liquid-permeable sheet side of the pad is disposed so as to contact the wearer's skin. It is preferable to wear the diaper cover so as to cover the absorbent pad.

  The pants-type wearing article of the present invention widely includes those having a side seam portion that is separable and an inner sheet member including a belt-like non-adhesive band arranged on the skin surface side of the wearing article. In addition to the above-described pants-type diapers and diaper covers, the concept includes general wearing articles having a pants-type structure such as sanitary shorts and shorts-type napkins. This pants-type wearing article may be for infants or for adults. Moreover, in the pants-type wearing article of the present invention, the inner sheet member is not limited to a member in which the exterior sheet is folded back, and may be an independent member or an extended portion of another component member. Similarly, the band-shaped non-adhesive band is not limited to being located at the lower end of the inner sheet member as a portion extending in the waistline direction, but may be located at the upper end or arranged at a plurality of positions. As long as it is necessary, the fracture inducing structure may be arranged at an appropriate position if necessary.

DESCRIPTION OF SYMBOLS 1 Exterior sheet 2 Inner sheet member 3 Side seam part 3r Outer edge 3s Inner edge 3i Side seam part upper end edge 3k Side seam part lower end edge 4 Absorbent main body 10 Disposable diaper

Claims (5)

A pants-type wearing article having a waist opening and a pair of suspension openings,
The pants-type wearing article has a pair of left and right side seam portions in which a member constituting the abdomen and a member constituting the dorsal side are overlapped with each other, and the abdomen and / or the dorsal side An inner sheet member covering the waist or abdomen of the wearer is joined to the skin side of the member,
The inner sheet member having the belt-like non-adhesive band has a waist-band non-adhesive band that is non-adhered to the abdominal member and / or the back-side member in the lower end region in the height direction of the wearer of the inner sheet member. Are joined at the side seam portion,
The band-shaped non-adhesive band is a pants-type wearing article having a breakage induction structure that induces a break in the height direction on at least one of right and left in the vicinity of the side seam portion. The break induction structure and pants-type wearing article according to claim 1 Symbol placement distance between the inner edge of the side seams is 20mm or less. The pants-type wearing article according to claim 1 or 2 , wherein the breakage induction structure is formed on at least one of an abdominal side and a back side. The pants-type wearing article according to any one of claims 1 to 3 , wherein the breakage induction structure is either a perforation or a weakened portion of a sheet member. The underpants-type wearing according to any one of claims 1 to 4, wherein the underpants-type wearing article includes an exterior body having an abdomen part, a dorsal part, and a crotch part between the two parts. Goods.

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