JP2015171399A - Disposable paper diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable paper diaper for eliminating the clearance from a body thereby to prevent urine or loose passage from leaking out.SOLUTION: An absorbent body 10 is jointed, at least at a junction area 30 along a peripheral edge of an absorber 13, to an exterior sheet 20, and is formed with a non-junction area 31 on the inner side of the junction area 30. Elastic extension members 25, 25 and so on arranged at least on the back side (or on the side of a back body B) are arranged to extend into the non-junction area 31. At a center portion in a diaper width direction in the non-junction area 31, the elastic extension members 25, 25 and so on arranged on a longitudinal end side of the diaper are inactivated in extension at an end side inactivation region 32 defined into a substantially equal width in the diaper width direction along the diaper longitudinal direction, and the elastic extension members 25, 25 and so on arranged on the longitudinally central side of the diaper are inactivated in elasticity in a central side inactivation region 33 defined wider than the end side inactivation region 32.

Description

  The present invention relates to a disposable paper diaper in which a plurality of elastic elastic members are disposed along a horizontal direction with an interval in the vertical direction between an upper layer nonwoven fabric and a lower layer nonwoven fabric.

  Conventionally, as shown in FIG. 12, as a pants-type disposable paper diaper 50, an absorbent main body 51 including an absorbent body 53 and an exterior sheet 52 integrally provided on the outer surface side of the absorbent main body 51. Thus, it is known that the waist opening WO and the pair of left and right leg openings LO, LO are formed by joining the front body and the back body of the exterior sheet 52 at both sides in the product state.

  The outer sheet 52 is a non-woven sheet having a two-layer structure in which an upper layer non-woven fabric 54 and a lower layer non-woven fabric 55 are bonded by a hot-melt adhesive or the like, and is between the upper layer non-woven fabric 54 and the lower layer non-woven fabric 55. It is common to use a plurality of elastic elastic members 56, 56... Arranged in the horizontal direction at intervals in the vertical direction on the waist part and the waist part of the back and back bodies. Shirring is formed in the waist and the waist, and the fit to the body is enhanced.

  However, in the conventional disposable paper diaper 50, as shown in FIG. 12, among the elastic elastic members arranged on the exterior sheet 51, the elastic properties of most of the elastic elastic members overlapping the absorber are deactivated. Thus, the contraction force of the elastic elastic member is prevented from acting so that the surface of the absorbent main body becomes substantially flat. For this reason, the surface of the absorptive main body was not in close contact with the skin surface, and the gap was easily formed between the body and the body. In particular, in the back portion, there has been a problem that urine and soft stool flow and leak.

  As a technique for improving the fit with the body, for example, in Patent Document 1 below, at least a part of the central portion of the absorber extends in the longitudinal direction of the absorber and forms a slit toward the front end side. By constructing both wall surfaces so as to spread toward the side edges of the absorbent body, when the absorbent article is worn, the width of the absorbent body disposed in the crotch portion is reduced, and excessive slack in the crotch portion is excessive. An absorptive article is disclosed in which a front body side and a back body side are appropriately fitted to a wearer's body while suppressing swelling and wrinkles so that a good wearing feeling can be obtained.

JP 2012-90818 A

  However, although the technique which improved the feeling of wear in a crotch part is disclosed by the said patent document 1, the technique which improves the clearance gap between the back side and the abdominal side body was not described. In particular, it has been pointed out that on the back side, although urine, loose stool, etc. are likely to leak, leakage is likely to occur because of the low adhesion between the absorbent main body and the body as described above.

  Therefore, a main problem of the present invention is to provide a disposable paper diaper that eliminates a gap with the body and prevents leakage of urine and soft stool.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent main body including at least an absorbent body and an upper surface nonwoven fabric and a lower nonwoven fabric are provided between the upper nonwoven fabric and the lower nonwoven fabric. In disposable paper diapers composed of an exterior sheet in which a plurality of elastic elastic members are arranged along the horizontal direction at intervals in the direction,
The absorbent main body is joined to the exterior sheet at least in a joining region along the periphery of the absorber, and a non-joining region is formed inside the joining region,
The elastic elastic member arranged at least on the back side is arranged so as to extend to the non-joining region, and the elastic elastic member arranged on the diaper longitudinal direction end side in the diaper width direction central portion, The elastic stretchable member is deactivated in the end-side deactivation region defined in substantially equal width in the diaper width direction along the diaper longitudinal direction and is disposed on the diaper longitudinal center side However, a disposable paper diaper is provided in which stretchability is deactivated in a center-side deactivation region defined wider than the end-side deactivation region.

  In the invention according to the first aspect, the absorbent main body is bonded to the exterior sheet at least in the bonding region along the periphery of the absorber, and the non-bonding region is formed inside the bonding region. Then, at least on the back side, the elastic elastic member is arranged to extend to the non-joining region, so that a contraction force for contracting the absorbent main body in the diaper width direction is applied to the exterior sheet, and the absorbent main body diaper A predetermined region in the width direction is deformed to bulge toward the skin surface along the diaper longitudinal direction.

  Specifically, at least the elastic elastic member arranged on the back side is arranged in the diaper width direction center, and the elastic elastic member arranged on the diaper longitudinal end side is in the diaper width direction in the diaper width direction. The elastic stretch member disposed on the center side in the longitudinal direction of the diaper is inactivated at the end side inactive region defined by the substantially equal width, and the end side side inactive The stretchability is deactivated in the central deactivation region defined wider than the activation region. As a result, the contraction force of the elastic elastic member acts on both sides of the diaper width direction in the non-bonded region, and the contraction force does not act on the central portion, so that both sides of the absorbent body in the diaper width direction are along the diaper longitudinal direction. This causes deformation that bulges to the skin surface side. In addition, the shrinkage force on both sides of the diaper width direction acts strongly on the diaper longitudinal direction end side (end side deactivation region side) of the exterior sheet, and the diaper longitudinal direction center side (center side deactivation region side). Since the absorptive main body bulges higher on the skin surface side on the diaper longitudinal direction end side and deforms bulges lower on the center side in the diaper longitudinal direction. In addition to the fact that the entire outer sheet contracts in the width direction due to the contraction force of the elastic elastic member, the absorbent main body contracts in the width direction, so that both sides of the aforementioned absorbent main body bulge to the skin side. Moreover, the diaper width direction center part of an absorptive main body also comes to bulge to the skin side. By deforming the absorbent main body in this way, the bulging area at the center in the width direction of the absorbent main body is in close contact with the groove of the buttock, and the bulging areas on both sides in the width direction are in close contact with the skin surface. , The gap between the body and the urine and loose stool can be prevented from leaking.

  According to a second aspect of the present invention, there is provided the disposable paper diaper according to the first aspect, wherein the central deactivation region is formed so as to gradually widen from the end portion deactivation region.

  According to a third aspect of the present invention, the central deactivation region is wider than the end portion deactivation region and is formed with a substantially equal width in the diaper width direction along the diaper longitudinal direction. The disposable disposable diaper described is provided.

  The inventions according to claims 2 and 3 show examples of the central-side non-activation region.

  As an aspect of the present invention according to claim 4, the absorber is provided with an opening penetrating from the skin surface side to the non-skin surface side or a concave portion with a reduced thickness of the absorber on both sides of the end side non-activation region. The disposable paper diaper in any one of Claims 1-3 currently provided is provided.

  In the invention of claim 4, by providing the opening or recess, the urine or soft stool is temporarily stored in the opening or recess and prevented from leaking to the rear side. The absorber is easily deformed into an uneven shape.

  As the present invention according to claim 5, the disposable paper diaper according to claim 4, wherein the opening or the recess is provided symmetrically spaced apart in the diaper width direction on both sides of the end side deactivation region. Is done.

  In the invention according to claim 5, the openings or the recesses are provided symmetrically in the diaper width direction on both sides of the end-side deactivation region, so that both sides of the absorbent main body in the diaper width direction and The bulging area formed at the center is easily formed with the opening as a base point.

  As the present invention according to claim 6, the elastic elastic members arranged at intervals in the vertical direction are made non-stretchable at the center side from the side edge portion of the absorber or the vicinity thereof, every other piece or plural pieces. The disposable paper diaper in any one of Claims 1-5 activated is provided.

  In the invention described in claim 6 above, the elastic side of the absorber is stretched from the side edge of the absorber or the vicinity thereof every other one or more of the elastic elastic members arranged at intervals in the vertical direction. Is deactivated, the contraction force of the elastic elastic member is adjusted, and the height at which the absorbent main body protrudes to the skin side is adjusted.

  According to a seventh aspect of the present invention, in the absorbent body, at least a contour line of a longitudinal end edge on the back side is formed in a wave shape including an inner convex portion and an outer convex portion. A disposable paper diaper according to any of the above is provided.

  According to the seventh aspect of the present invention, by forming the contour line of the longitudinal end edge on the back side of the absorber in a wavy shape, the inner convex portion is caused by the difference in rigidity between the outer convex portion and the inner convex portion. The absorber is easily deformed into an uneven shape with the portion as a base point.

  The disposable paper diaper according to any one of claims 1 to 7, wherein, as the present invention according to claim 8, the absorbent main body is formed with the non-joining regions at least in both sides in the width direction and in the center in the width direction. Is done.

  In the invention according to claim 8, by forming the non-bonded regions on both sides in the width direction and the central portion in the width direction where the bulging regions of the absorbent main body are formed, the absorbent main body is deformed in these regions. I can do it.

  As described above in detail, according to the present invention, there is no gap between the body and urine and loose stool can be prevented from leaking.

It is a partial fracture development view of disposable paper diaper 1 concerning the present invention. It is the II-II arrow directional view of FIG. It is the III-III arrow directional view of FIG. It is a product state appearance rear view of disposable paper diaper 1. It is a product state appearance rear view of disposable paper diaper 1 which shows a deformation state of absorptive main part 10. It is a product state external appearance rear view of the disposable paper diaper 1 which shows a modification (the 1). It is a product state external appearance rear view of disposable paper diaper 1 which shows a modification (the 2). It is a product state external appearance rear view of disposable paper diaper 1 which shows a modification (the 3). It is the IX-IX line arrow directional view of FIG. It is a product state external appearance rear view of disposable paper diaper 1 which shows a modification (the 4). It is a product state external appearance rear view of disposable paper diaper 1 concerning other forms. It is a product state appearance rear view which shows the conventional disposable paper diaper 50.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the disposable paper diaper 1 (hereinafter also simply referred to as a diaper) is provided between a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a waterproof sheet 12 made of polyethylene or the like. Absorption in which absorbent bodies 13 such as cotton-like pulp surrounded by a covering sheet 14 made of nonwoven fabric or crepe paper are interposed, and three-dimensional gathers BS and BS standing on the skin side are formed on both sides of the surface side. 4 and the exterior sheet 20 integrally provided on the outer surface side of the absorbent body 10, and in the product state, as shown in FIG. Waist opening WO and a pair of left and right leg openings LO, LO are formed by overlapping the front body F and the back body B and joining them at the joining edges 21 and 22 at both ends. The is a pants-type diaper of the structure.

  Hereinafter, the structure of the disposable paper diaper 1 will be described in detail.

(Structure of the absorbent main body 10)
First, an example of the structure of the absorbent main body 10 will be described in detail with reference to FIGS.

  As described above, the absorbent main body 10 is an absorbent body such as cotton-like pulp surrounded by the covering sheet 14 between the liquid-permeable top sheet 11 made of nonwoven fabric or the like and the waterproof sheet 12 made of polyethylene or the like. 13 is interposed to absorb and retain body fluids.

  In the illustrated example, the absorbent body 13 is formed with a substantially square shape in plan view, and the width dimension thereof is a dimension width that does not give the wearer a feeling of gore by hitting the crotch portion. The absorbent body 13 is surrounded by a covering sheet 14 in order to maintain the shape and improve the diffusibility of the body fluid that has passed through the liquid-permeable top sheet 11. As the absorber 13, it is desirable to use an airlaid absorber that can reduce the bulk.

The absorber 13 has a rigidity obtained by the following stiffness test of 5 to 50 cN / 50 mm, preferably 15 to 35 cN / 50 mm.
<Rigidity test>
Stiffness (rigidity) is measured by the following method in accordance with JIS K 7171 (Plastic-Bending stiffness test method). For the measurement, a Tensilon tester (curvature radius R1 = 5.0 ± 0.1 mm at the tip of the indenter, curvature radius R2 = 5.0 ± 0.2 mm at the tip of the support plate) was used, and the absorber longitudinal direction (longitudinal direction). ) Is measured. The test piece is prepared by removing the elastic elastic member that affects the measurement from the absorber 13 and cutting it into a rectangle with a diaper longitudinal direction of 80 mm and a diaper width direction of 50 mm. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. Each test piece is placed on a pair of support plates, each having an arcuate cross-sectional tip, and the gap between the tips (upper ends) of both tips is aligned. The indenter tip is placed so as to be stretched over in the orthogonal direction and slightly in contact with the test piece. A load-deflection curve is obtained by lowering the indenter under the conditions of a load cell of 5 kg (range 196 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm). In addition, when the site | part used as a measuring object is smaller than the said sampling dimension, it measures with a small scale test piece, and converts it by proportional calculation based on a dimension ratio.

  As the liquid-permeable top sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Of these processing methods, the spunlace method is excellent in terms of flexibility and the spunbond method is excellent in drapeability, and the thermal bond method and the air-through method are excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable top sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid-permeable top sheet 11 is wound around the side edge of the absorbent body 13 and extends to the back surface side (non-skin contact surface side) of the absorbent body 13.

  As the waterproof sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impervious plastic sheet such as polyethylene or polypropylene is used, but in recent years, it has moisture permeability from the viewpoint of preventing stuffiness. Are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility.

  On the other hand, as shown in FIG. 2, the gathered nonwoven fabric 15 that forms the three-dimensional gathered BS is a nonwoven fabric made into a double sheet by folding, and the side of the absorbent body 13 that is wound by the liquid-permeable topsheet 11. The edge portion is further wound up from the upper side thereof, extends to the back surface side of the absorber 13, and is bonded.

  In the gathered nonwoven fabric 15 formed of the double sheet nonwoven fabric, a plurality of thread-like elastic members 16, 16... At the standing tip side portion and thread-like elastic elastic members 17, 17 at the standing base end portion and the middle portion, respectively. Are arranged. As shown in FIG. 2, the thread-like elastic members 16, 16... Are for forming a three-dimensional gather BS by erecting a nonwoven fabric portion protruding from the absorber side edge portion by elastic stretching force. Moreover, the said waterproof sheet 12 approachs the inside of the said double sheet-like gather nonwoven fabric 15, and comprises the leak-proof wall in the three-dimensional gather BS.

  In the same manner as the liquid-permeable top sheet 11, the material fiber constituting the gathered nonwoven fabric 15 is made of synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, regenerated fibers such as rayon or cupra, Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a non-woven fabric with a low basis weight and excellent air permeability. Further, with respect to the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging and to improve the feel to the skin (dry feeling), a silicon-based, paraffin-metal-based, alkylchromic chromoid-based water repellent It is desirable to use a water-repellent non-woven fabric coated with such as.

(Structure of exterior sheet 20)
As shown in FIGS. 1 to 3, the exterior sheet 20 is a non-woven sheet having a two-layer structure including an upper layer nonwoven fabric 20A and a lower layer nonwoven fabric 20B, and various elastic elastic members between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B. 24 and 25 are provided and provided with elasticity. In the planar shape, concave notches are formed to form leg openings LO on both sides of the middle, forming a pseudo hourglass shape as a whole.

  In the exterior sheet 20 according to the present invention, as the elastic elastic member, as shown in FIG. 1, waist elastic elastic members 24, 24... Disposed in the waist opening WO, the front body F and the back body B includes a plurality of waist elastic elastic members 25, 25... Arranged in the horizontal direction at intervals in the vertical direction.

  When joining the exterior sheet 20 and the absorbent main body 10, at least a predetermined joining region 30 along the periphery of the absorber 13 is joined by a joining means such as a hot melt adhesive or heat seal, The region is a non-joined region 31 that is not joined. In the example shown in FIG. 4, bonding is performed at a bonding region 30 along the periphery of the absorbent body 13, and a non-bonding region 31 that does not bond the absorbent main body 10 and the exterior sheet 20 is formed inside the bonding region 30. ing. That is, in the conventional disposable paper diaper 50, as shown in FIG. 12, almost all of the absorbent main body 10 is joined to the exterior sheet 20, but in the present disposable paper diaper 1, along the outer edge of the absorbent body 13. Thus, bonding is performed in a bonding region 30 having a predetermined width provided so as to go around the absorber 13, and a non-bonding region 31 is formed on the inner side.

  The dimension of the non-joining region 31 in the diaper width direction is preferably 30% or more and 60% or less of the width dimension of the absorber 13. In addition, the width of the bonding region 30 extending in a strip shape along the outer edge of the absorber 13 is preferably 20% or more and 35% or less of the width dimension of the absorber 13.

(About elastic elastic members 24 and 25)
As shown in FIGS. 1 and 4, the elastic elastic members 24 and 25 (hereinafter referred to as “elastic elastic members 25”) arranged on the back side (rear body B) of the exterior sheet 20 are shown. It extends continuously from the side edge portion to the non-bonding region 31 beyond the bonding region 30 with the absorbent main body 10. In the diaper width direction center part in the non-joining region 31, the elastic elastic member 25 disposed on the diaper longitudinal end side (waist opening WO side) is substantially equal in the diaper width direction along the diaper longitudinal direction. The elastic stretch is deactivated in the end-side deactivation region 32 defined in the width, and the elastic stretch disposed in the center side in the longitudinal direction of the diaper continuous with the end-side deactivation region 32 The stretchability of the member 25 is deactivated in a center-side deactivation region 33 defined wider than the end-side deactivation region 32. That is, the elastic elastic members 25 extending inward from the bonding region 30 are disposed on both sides of the end side deactivation region 32 in the diaper width direction, and the bonding region is disposed on both sides of the central deactivation region 33 in the diaper width direction. It is arranged longer than the length of the elastic elastic member 25 extending inward from 30.

  Thus, by disposing the elastic elastic member 25 so as to extend to the non-joining region 31 inside the joining region 30, the absorbent main body with the joint regions 30 and 30 on both sides in the width direction as the base point on the exterior sheet 20 is provided. The contraction force which contracts 10 to the diaper width direction comes to act, and the predetermined area | region of the diaper width direction of the absorptive main body 10 comes to bulge to the skin surface side along a diaper longitudinal direction. Specifically, as shown in FIG. 5, the contraction force of the elastic elastic member 25 acts on both sides of the non-joining region 31 in the diaper width direction, and at the center (the non-activation regions 32 and 33). Since the contraction force does not act, bulging areas 34 and 34 that bulge toward the skin surface along the diaper longitudinal direction are formed on both sides of the absorbent main body 10 in the diaper width direction. Further, as a result of the entire exterior sheet 20 contracting in the width direction by the contraction force of the elastic elastic members 25, 25..., The absorbent main body 10 contracts in the width direction. In addition, a bulging region 34 that bulges toward the skin surface along the diaper longitudinal direction is also formed in the central part of the absorbent main body 10 in the diaper width direction. The bulging regions 34, 34,... Are formed on both sides of the diaper in the width direction and the center portion in the width direction of the absorbent main body 10 so that the bulging region 34 in the width direction central portion of the absorbent main body 10 is formed in the groove of the buttock. Since the swollen regions 34 and 34 on both sides in the width direction are in close contact with the skin surface, the gap with the body is reduced, and urine and loose stool can be prevented from flowing and leaking.

  In addition, the bulging areas 34 and 34 formed on both sides in the width direction of the absorbent main body 10 are strongly contracted on the end side in the diaper longitudinal direction side of the exterior sheet 20 (on the end side deactivation area 32 side). Since the contraction force acts weaker than this at the diaper longitudinal direction center side (central side inactivation region 33 side), the absorbent main body 10 is at the diaper longitudinal end side (end side non-activation region 32 side). It bulges high on the skin surface side and becomes lower on the center side in the longitudinal direction of the diaper (on the side of the central deactivation region 33). That is, by forming the center-side inactive region 33 wider than the end-side inactive region 32 and reducing the contraction force on the center side in the longitudinal direction of the diaper, the uneven deformation of the absorbent main body 10 is reduced to the inseam. It prevents from expanding to the side. In FIG. 5, as the bulging region 34, a range that bulges to the skin surface side by drawing in a trapezoidal shape in which the diaper longitudinal direction end side is partitioned broadly and the diaper longitudinal direction center side is partitioned narrowly; The bulge height to the skin surface side is high at the diaper longitudinal direction end side, and represents that it is low at the center side. On the contrary, the bulging region 34 at the center in the width direction is formed such that the bulging height is high at the center side in the diaper longitudinal direction and the bulging height is low at the end side in the diaper longitudinal direction. The center side goes deeply into the buttocks. By deforming the absorbent main body 10 in this way, the bulging region 34 is in close contact with the skin surface, and the gap between the body and the body becomes small, so that leakage of urine and soft stool can be prevented.

  The end-side deactivation region 32 deactivates the elastic stretchable member 25 in the non-bonded region 31 at a central portion in the diaper width direction over a predetermined length in the diaper longitudinal direction with a constant width. This is a substantially rectangular area. The length L1 in the diaper longitudinal direction of the end-side deactivation region 32 is preferably 50 mm or more and 70 mm or less, and the width W1 in the diaper width direction is preferably 10 mm or more and 30 mm or less.

  Here, the elastic expansion / contraction member 25 is “deactivated stretchability” means that the elastic expansion / contraction member is finely cut at a predetermined interval by discontinuous means described later, or the elastic expansion / contraction member is spread over a predetermined section. By continuously adhering to the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B, the stretchable force of the elastic stretchable member does not function or the function is greatly reduced. In order to cut the elastic stretchable member finely, for example, the elastic stretchable member is cut with a predetermined cut pattern at intervals of 1 to 10 mm, preferably at intervals of 1 to 5 mm.

  In order to cut and discontinue the elastic elastic members 25, after producing a continuous sheet for an exterior sheet in which the exterior sheet 20 is continuous, a convex portion is formed on the surface, and a plurality of cutters are arranged on the convex portion. The exterior sheet continuous sheet is passed between a cutter roll and an opposing roll facing the cutter roll, and the elastic elastic member 25 of the exterior sheet continuous sheet is placed between the convex part of the cutter roll and the opposed roll. It cuts by at least one of pressurization and heating. The opposing roll is preferably separated from the cutter roll so that the cutter part is lowered by the rotation of both rolls and comes into contact with only the cutter part of the cutter roll.

  In the example shown in FIG. 4, the center-side deactivation region 33 is a region where the stretchability of the elastic stretchable member 25 is deactivated so as to continuously widen from the end-side deactivation region 32. is there. The central deactivation region 33 may be 90 mm or more and 100 mm or less in a range where the diaper width direction width W2 of the diaper longitudinal direction central side end does not exceed the width of the non-joining region 31.

  Moreover, although the length of the diaper longitudinal direction which totaled the said edge part side non-activation area | region 32 and the center side non-activation area | region 33 changes with sizes of a diaper, it is preferable to set it as 140 mm or more and 160 mm or less.

  In the conventional diaper, as shown in FIG. 12, almost the entire surface of the absorbent main body 10 is bonded to the exterior sheet 20, and the elastic elastic members 56, 56... Extend and contract in a trapezoidal region overlapping the absorber. It was common to deactivate sex. The dimensions of this region vary depending on the size of the diaper, but generally the upper side length 57 is 70 to 80 mm, the lower side length is 90 to 100 mm, and the height is about 140 to 160 mm. Therefore, in the present diaper, the non-activated region is formed to be considerably smaller than the conventional one, and the contraction force of the elastic elastic member 25 is applied to a predetermined part of the absorbent main body 10.

  As shown in FIG. 6, the elastic elastic members 25, 25... Arranged at intervals in the vertical direction are arranged on the center side from the side edge of the absorber 13 or the vicinity thereof, every other piece or plural pieces. The stretchability may be deactivated. That is, the elastic elastic member 25 is deactivated at the side edge of the absorber 13 every other one or several, so that the elastic elastic member 25 does not extend to the non-joining region 31. Thus, the contraction force of the elastic elastic member 25 is prevented from acting. Accordingly, the contraction force of the elastic elastic members 25, 25,... As a whole is suppressed, and the height at which the absorbent main body 10 protrudes toward the skin side can be adjusted. The ratio of the elastic elastic members 25 extending to the non-activated regions 32 and 33 may be 65% or more with respect to the total number of elastic elastic members 25 arranged in these regions. For example, in FIG. 6, the elastic elastic member 25 that extends to the non-activated regions 32 and 33 by deactivating the central side from the side edge portion of the absorber 13 or the vicinity thereof every other two. The number is set to a ratio of two to three.

  As shown in FIG. 7, in the absorbent body 13, at least the outline of the longitudinal direction edge on the back side (rear body B side) has inner convex portions 35 and outer convex portions 36 arranged alternately. It may be wavy. As a result, due to the difference in rigidity between the inner convex portion 35 and the outer convex portion 36, the absorbent main body 10 is easily deformed with the inner convex portion 35 as a base point, and is linked to the contraction force of the elastic elastic member 25. As a result, it is possible to assist the deformation of the absorbent main body 10 into an uneven shape.

  As shown in FIG. 7, the wavy outline is formed in a wavy shape in which an outer convex portion 36 is formed at each side in the width direction and a central portion in the width direction, and an inner convex portion 35 is formed between them. It is preferable that As a result, deformation that causes the outer convex portion 35 to bulge outward from the inner convex portion 35 tends to occur, and the bulging region 34 is easily formed.

  As shown in FIGS. 8 and 9, the absorbent body 13 has openings 37, 37 penetrating from the skin surface side to the non-skin surface side on both sides of the end-side deactivation region 32, respectively. The diaper can be provided symmetrically apart from each other in the width direction. By providing the openings 37, 37 symmetrically in the diaper width direction on both sides of the end-side deactivation region 32, urine, loose stool, etc. are temporarily stored in the opening 37 and flow to the rear side. Leakage can be further prevented, and the absorber 13 can be easily deformed into an uneven shape with the opening 37 as a base point.

  The shape of the opening 37 can be formed in various shapes such as a circle and a polygon in addition to the elliptical shape in the illustrated example. The length of the opening 37 in the longitudinal direction of the diaper is preferably 40 mm or more and 60 mm or less. Further, the position where the opening 36 is provided is provided within a range of 80 mm or less from the diaper longitudinal end of the back side (back body B side). Since the range within 80 mm is a range in which the absorbent main body 10 is deformed into an uneven shape, it is preferably provided in this range.

  As shown in FIG. 8, the openings 37, 37 arranged in a bilaterally symmetrical manner are arranged in a square shape with a wider separation width at the center side in the diaper longitudinal direction than at the end side in the diaper longitudinal direction. Is preferred. As a result, the bulging regions 34, 34... Formed on both sides and the top of the absorbent main body 10 in the diaper width direction are easily formed in a mountain shape with these openings 37, 37 as valleys, and the difference between the peaks and valleys becomes clear. Will be formed. The C-shaped orientation direction is preferably formed at substantially the same angle as the valley direction, and at substantially the same angle as the direction of the rising base point where the bulging regions 34, 34. By providing the opening 37 at the bottom of the valley, urine and loose stool flowing along the valley can be reliably captured.

  When the opening 37 is provided, the outer line of the absorber 13 in the longitudinal direction of the diaper is formed in a wavy shape, and the wavy external line is formed at a position overlapping the inner convex part 35 in the diaper longitudinal direction. By doing so, the absorptive main body 10 can be further easily deformed into an uneven shape.

  When the opening 37 is provided, it is preferable that the three-dimensional gather BS is provided so that the diaper width direction outer end of the opening 37 or a position on the outer side of the diaper width direction is a standing base end. As a result, the body fluid blocked by the three-dimensional gather BS can be reliably temporarily stored in the opening 37. More preferably, the standing base end of the three-dimensional gather BS and the outer end portion of the opening 37 in the diaper width direction may be provided at a position substantially coincident with the diaper width direction.

  As shown in FIG. 10, the center-side deactivation region 33 can be formed wider than the end-side deactivation region 32 and substantially equal in the diaper width direction along the diaper longitudinal direction. is there. In this case, the center-side deactivation region 33 is a boundary portion between the end-side deactivation region 32 and the center-side deactivation region 33, and the length for deactivating the stretchability of the elastic stretch member 25 is abrupt. And is formed in a substantially rectangular shape with a constant width up to the center side end in the longitudinal direction of the diaper. The width in the diaper width direction of the central deactivation region 33 is preferably 90 mm or more and 100 mm or less, although it varies depending on the diaper size.

  By the way, the elastic elastic member 25 is preferably arranged in a stretched state of 250% to 290% (2.5 times to 2.9 times the natural length) when the natural length is 100%. The thickness of the elastic elastic member 25 is preferably 310 dt to 620 dt. The elastic elastic members 25 are preferably arranged at an interval of 1 to 10 mm, particularly at an interval of 1 to 5 mm. The shrinkage force of the exterior sheet 20 can be adjusted by adjusting the elongation rate and thickness of the elastic elastic member 25 to be arranged.

  Further, in order to prevent the wearing feeling of the diaper from deteriorating, the residual shrinkage force of the elastic stretchable member 25 whose stretchability is deactivated in the end-side deactivation region 32 is expanded and contracted in the center-side deactivation region 33. It is preferable that the difference is substantially equal to or within 5% of the residual shrinkage force of the elastic elastic member 25 whose properties are deactivated.

[Other examples]
(1) In the above embodiment, the non-activation region of the elastic elastic member 25 disposed on the back side (back body B side) is defined, and the back side portion of the absorbent main body 10 is deformed into a predetermined uneven shape. However, the elastic stretch member 25 arranged on the ventral side (front body F side) is similarly provided with a non-activated region or the like, thereby deforming the ventral side portion of the absorbent main body 10 to a predetermined uneven shape. You may do it.
(2) In the above-described embodiment, the bonding region 30 is provided along the periphery of the absorber 13, but in addition to this, both sides of the end-side deactivation region 32 are added as shown in FIG. Each may be provided along the longitudinal direction. That is, the joining area | region 30 is provided in the intermediate part of the said bulging area | region 34,34 ... along the part which becomes a recessed part at the skin side. As a result, the non-bonding regions 31 are formed on both sides and the center in the width direction.
(3) In the above-described embodiment, the opening portions 37 penetrating from the skin surface side to the non-skin surface side are provided on both sides of the end portion side deactivation region 32 of the absorbent body 13. You may make it provide the recessed part in which the skin surface side became depressed by making the thickness of the body 13 thin.

  DESCRIPTION OF SYMBOLS 1 ... Disposable paper diaper, 10 ... Absorbent main body, 11 ... Liquid-permeable top sheet, 12 ... Waterproof sheet, 13 ... Absorber, 14 ... Cover sheet, 15 ... Gathered nonwoven fabric, 16.17 ... String-like elastic elastic member, 20 ... exterior sheet, 20A ... upper layer nonwoven fabric, 20B ... lower layer nonwoven fabric, 24 ... elastic elastic member (waist elastic elastic member), 25 ... elastic elastic member (waist elastic elastic member), 30 ... bonding region, 31 ... non-bonding region 32 ... End side deactivation region, 33 ... Center side deactivation region, 34 ... Swelling region, 35 ... Inner convex part, 36 ... Outer convex part, 37 ... Opening part

Claims (8)

An elastic main body including at least an absorbent body, and a plurality of elastic elastic members that are integrally provided on the outer surface side of the absorbent main body and that are spaced apart in the vertical direction between the upper nonwoven fabric and the lower nonwoven fabric along the horizontal direction In a disposable paper diaper composed of an outer sheet and
The absorbent main body is joined to the exterior sheet at least in a joining region along the periphery of the absorber, and a non-joining region is formed inside the joining region,
The elastic elastic member arranged at least on the back side is arranged so as to extend to the non-joining region, and the elastic elastic member arranged on the diaper longitudinal direction end side in the diaper width direction central portion, The elastic stretchable member is deactivated in the end-side deactivation region defined in substantially equal width in the diaper width direction along the diaper longitudinal direction and is disposed on the diaper longitudinal center side However, the disposable diaper is characterized in that the stretchability is deactivated in the central deactivation region defined wider than the end side deactivation region.   The disposable diaper according to claim 1, wherein the center-side deactivation region is formed so as to gradually widen from the end-side deactivation region.   The disposable paper diaper according to claim 1, wherein the center-side inactivated region is wider than the end-side inactivated region and is formed with a substantially equal width in a diaper width direction along a diaper longitudinal direction.   The said absorber is provided with the recessed part which made thin the opening part penetrated from the skin surface side to the non-skin surface side, or the thickness of the absorber on both sides of the said edge part non-activation area | region. The disposable paper diaper described in Crab.   The disposable diaper according to claim 4, wherein the opening or the recessed portion is provided symmetrically on both sides of the end-side non-activated region and spaced apart in the diaper width direction.   The elastic elastic member arranged at intervals in the up-down direction is deactivated on the central side from the side edge portion of the absorber or the vicinity thereof every other one or plural elastic elastic members. 5. The disposable paper diaper according to any one of 5 above.   The disposable diaper according to any one of claims 1 to 6, wherein the absorbent body is formed in a wavy shape in which at least a contour line of a longitudinal end edge on the back side includes an inner convex portion and an outer convex portion.   The disposable absorbent diaper according to any one of claims 1 to 7, wherein the absorbent main body is formed with the non-bonded regions at least in both sides in the width direction and in the center in the width direction.

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