JP4299648B2 - Disposable excrement disposal articles - Google Patents

Description

  The present invention relates to a disposable excrement disposal article that absorbs and retains excreta.

  It has both end portions extending in the vertical direction, both side portions extending in the horizontal direction, has a front region and a rear region in the vertical direction, and an intermediate region located between the front and rear regions, and is positioned on the skin contact side. A liquid-permeable top sheet and a liquid-impervious back sheet located on the skin non-contact side, a pair of liquid-impervious leak-proof sheets located on both sides and extending in the vertical direction, and a front and back sheet interposed In addition, there is a disposable liquid-absorbing pad which is composed of a liquid-absorbent core extending between the front and rear regions, and has two bent portions extending in the vertical direction at the center in the lateral direction between the front and rear regions and the intermediate region (patent) Reference 1).

The bent portions are arranged in the vertical direction with a given dimension. The rigidity of the core in the bent portion is lower than that of the remaining portion of the core excluding the bent portion. The leak-proof sheet is fixed to both ends of the article in a state where the leak-proof sheet is fixed to both sides of the article and extends in the vertical direction, a free part having an upward propensity toward the upper side of the surface sheet, and lying inward in the lateral direction. And both fixed ends. A stretchable elastic member extending in the vertical direction is attached to the free portion of the leak-proof sheet so as to be shrinkable. This pad is bent in a cross-sectional mountain shape through the bent part with the back sheet inside so that the laterally central part of the front and rear area and the intermediate area is convex toward the skin contact side. The lateral dimension between both side portions of the pad can be reduced, and the intermediate portion can easily fit in the wearer's crotch, so that the pad can be easily attached to the wearer.
JP 2003-210507 A

  In the pad disclosed in Patent Document 1, even if the front and rear regions and the middle region are bent via the bent portion, the front and rear regions are three-dimensionally deformed so as to match the shape of the wearer's abdomen and buttocks. Absent. Even when this pad is forced to bend along the shape of the abdomen and buttocks when wearing the pad, a partial gap is created between the front and back area and the skin of the wearer, and the excrement is padded. May leak from both ends. In addition, in this pad, the free part of the leak-proof sheet stands up above the top sheet to form a barrier against excrement, but in the front and rear areas, the fixed both ends of the leak-proof sheet are lying inward in the lateral direction. Therefore, it is not possible to prevent leakage of excrement from both sides of the front and rear area by using the leakage prevention sheet.

  An object of the present invention is to provide a disposable excrement disposal article in which the front and rear regions match the shape of the wearer's abdomen and buttocks, and can prevent leakage of excrement from both ends and both sides of the front and rear region. is there.

The premise of the present invention to solve the above problems is the longitudinal direction and the lateral direction, the skin contact surface side and the non-skin contact surface side, the front region, the rear region, and the intermediate region located between the front and rear regions. , a liquid-impermeable back sheet positioned on the liquid-permeable topsheet and the skin noncontacting side located on the skin contact surface side, a pair of spaced apart opposed to the transverse direction extending in the longitudinal direction liquid-impervious includes a Seibomo sheet, and a liquid-absorbent core interposed to extend between the front and rear regions between the table backsheet, the barrier sheet extends positioned between the front and rear regions to the longitudinal direction fixed Part, extending in the vertical direction in parallel with the fixed part, and having a free standing part above the face sheet, and fixed both end parts lying in the front-rear region and lying down laterally, stretchable first elastic members extending in the longitudinal direction, shrinkage mountable et al is in the free part of the barrier sheet That is a disposable waste processing goods.

As a feature of the present invention in the premise, the at least one of the front and back regions includes a pair of bent portions, the edge of the core from the side edges of the core positioned in the intermediate region side as mutual separation dimension approaches gradually The bent portion is gradually widened from the both side edges of the core toward the end edge of the core, and the core is a pair of movable portions positioned outward in the longitudinal direction of the bent portion, The bending portion has a lower rigidity than that of the movable portion and the main portion, and the rigidity value of the bending portion by the Taber method is 0. The stiffness value by the Taber method between the movable part and the main part is in the range of 9.0 to 50.0 mN · cm, and the fixed end of the leakproof sheet is on the movable part. together located, extending to the movable part the first elastic member across the upper bent portion, In addition, the elastic second elastic member extending in the lateral direction is attached so as to be shrinkable outward in the longitudinal direction of the edge of the core, and the movable portion is contracted by the elastic first and second elastic members. The force is inclined toward the side of the main part and pulled inward in the lateral direction .

  In this article, the free part of the leak-proof sheet contracts in the vertical direction due to the contraction force of the first elastic member, and accordingly, the movable part of the core is drawn toward the main part, and the movable part is located above the main part in the thickness direction. And a slope in the thickness direction with the bent portion sandwiched between the movable portion and the main portion.

The present invention has the following embodiments.
(1) In the article, the inclination angle of the bent portion with respect to the longitudinal center line that bisects the horizontal dimension is in the range of 20 to 70 °.
(2) The article has an extension stress in the range of 0.15 to 0.50 N at 93% extension of the free part of the leak-proof sheet including the first elastic member.
(3) In the article, the bent portion is formed of a top sheet and a back sheet excluding the core.
(4) In the article, the bent portion is formed of a front and back sheet and a core, and the rigidity of the core in the bent portion is lower than the rigidity of the core in the movable portion and the main portion.

  According to the disposable excrement disposal article according to the present invention, the free portion of the leak-proof sheet is contracted in the vertical direction by the contraction force of the first elastic member, and accordingly, the movable portion of the core is drawn toward the main portion side, The article is deformed into a three-dimensional shape so that the front and rear areas of the article are convex toward the non-skin contact side. In this article, the front and rear areas match the shape of the wearer's abdomen and buttocks, and there is no gap between the front and rear areas of the article and the wearer's skin, allowing the article to efficiently absorb excrement. It is possible to prevent leakage of excrement from both ends of the article. This article has a step between the movable part and the main part in spite of the fixed both ends of the leak-proof sheet lying in the lateral direction in the front and rear region, and the movable part forms a barrier against excrement. Therefore, the flow of excrement diffusing on the top sheet is blocked by the movable part, and leakage of excrement from both ends and both sides of the front and rear region can be prevented. In addition, since the leakproof sheets positioned in the front and rear areas approach in the lateral direction and the leakproof sheet surrounds the main part of the core in the front and rear areas from above, the article faces both ends and both sides of the front and rear areas. The excrement that has flowed can be held between the top sheet and the leak-proof sheet, and the excrement leaks from both ends and both sides. In this article, the rigidity of the bent portion is lower than the rigidity of the movable portion and the main portion, the rigidity value by the Taber method of the bent portion is in the range of 0.01 to 2.0 mN · cm, the movable portion and the main portion Since the rigidity value by the Taber method is in the range of 9.0 to 50.0 mN · cm, the movable part can be reliably pulled to the main part side, and the movable part and the main part will not be bent irregularly. A large number of gathers are not formed in the movable part or the main part.

  The inclination angle of the bent portion with respect to the longitudinal center line is in the range of 20 to 70 °, and the elongation stress at the time of 93% elongation of the free portion of the leak-proof sheet including the first elastic member is in the range of 0.15 to 0.50 N. In the article, the movable portion of the core can be reliably pulled toward the main portion by the contraction force of the first elastic member, and the front and rear areas of the pad can be reliably deformed into a three-dimensional shape.

  In the article that spreads toward the end edge from the both side edges of the core, the bent part stands on the end edge side of the core, and the flow of excrement that diffuses on the top sheet is caused by the movable part and the bent part. Therefore, the excrement does not reach both ends of the article, and the leakage of excrement from both ends can be surely prevented.

  In the article in which the elastic second elastic member extending in the lateral direction is attached to be shrinkable outward in the longitudinal direction of the edge of the core, the end of the article is contracted in the horizontal direction by the contraction force of the second elastic member, At the same time, the movable parts of the core are pulled sideways. In this article, the leak-proof sheets can be reliably approached in the horizontal direction by moving the movable parts in the horizontal direction, and the leak-proof sheet surrounds the main part of the core in the front-rear region from above. It is possible to hold the excrement that has flowed toward both sides of the head and front and back areas between the top sheet and the leak-proof sheet, and reliably prevent the excrement from leaking from both ends and both sides of the front and back areas. Can do.

  The article in which the bent portion is formed of the top sheet and the back sheet excluding the core can surely lower the rigidity in the bent portion than that of the movable portion or the main portion of the core.

  A bent part is formed of a front and back sheet and a core, and an article in which the rigidity of the core in the bent part is lower than the rigidity of the core in the movable part and the main part absorbs excrement in the core located in the bent part. Therefore, the bent portion can be used for absorption of excreta.

  The details of the disposable excrement disposal article according to the present invention will be described with reference to the accompanying drawings, taking a disposable pad as an example.

  1 and 2 are a partially broken plan view of the disposable pad 20A and a perspective view of the pad 20A of FIG. 3 and 4 are a sectional view taken along line 3-3 in FIG. 2 and a sectional view taken along line 4-4 in FIG. 2, and FIG. 5 is a sectional view taken along line 5-5 in FIG. is there. FIG. 1 shows a state in which the pad 20A is developed in the vertical and horizontal directions against the contraction force of the elastic members 45 and 50. FIG. In FIG. 2, the horizontal direction is indicated by an arrow L, the vertical direction is indicated by an arrow M, and the thickness direction is indicated by an arrow N. The inner surfaces of the front and back sheets 26 and 27 and the leak-proof sheet 28 are surfaces facing the core 29, and the outer surfaces of the sheets 26, 27 and 28 are surfaces not facing the core 29.

  The pad 20A has both end portions 21 extending in the horizontal direction in parallel with each other, and both side portions 22 extending in the vertical direction in parallel with each other, and includes a front region 23 and a rear region 25 in the vertical direction, and front and rear regions 23, 25. And an intermediate zone 24 located between the two. The pad 20A includes a pair of liquid-permeable topsheets 26 located on the skin contact side, a liquid-impervious backsheet 27 located on the skin non-contact side, and a pair of non-extends extending in the vertical direction so as to face each other in the lateral direction. The liquid-permeable leak-proof sheet 28 and a liquid-absorbent core 29 that is interposed between the front and back sheets 26 and 27 and joined to the inner surface of at least one of the sheets 26 and 27 are configured. The pad 20A has a vertically rectangular shape in plan view.

  The top sheet 26 is formed from a hydrophilic fiber nonwoven fabric 30. The back sheet 27 is formed of a composite sheet obtained by laminating a hydrophobic fiber nonwoven fabric 31 and a gas-permeable liquid-impermeable plastic film 32. The leak-proof sheet 28 is formed of a hydrophobic fiber nonwoven fabric 33 that has been subjected to water repellent treatment. The core 29 extends to the front and rear regions 23 and 25 and the intermediate region 24 of the pad 20A. The core 29 has a rectangular shape in plan view, and has both end edges 34 that are located in the front and rear regions 23 and 25 and extend in the horizontal direction, and both side edges 35 that are located between both end edges 34 and extend in the vertical direction.

  The core 29 is a mixture of particulate or fibrous superabsorbent polymer and fluff pulp, or a mixture of particulate or fibrous superabsorbent polymer, fluff pulp and thermoplastic synthetic resin fiber, Compressed to thickness. Therefore, the core 29 has higher rigidity than the front and back sheets 26 and 27 and the leakproof sheet 28. The core 29 is entirely covered with a tissue paper (not shown) in order to prevent the core 29 from being deformed.

  The front region 23 is formed with a pair of bent portions 36 that extend so that the distance from each other gradually toward the end edge 34 from both side edges 35 of the core 29 located on the intermediate region 24 side. The rear region 25 is formed with a pair of bent portions 37 extending so as to gradually approach each other from the both side edges 35 of the core 29 located on the intermediate region 24 side toward the end edge 34. The core 29 includes a pair of movable parts 38 positioned on the outer side in the vertical direction of the bent parts 36 and 37 with the bent parts 36 and 37 interposed therebetween, and a main part positioned on the inner side in the vertical direction of the bent parts 36 and 37. 39.

  The bent portions 36 and 37 have an inner edge 40 located on the main portion 39 side and an outer edge 41 located on the movable portion 38 side. The bent portions 36, 37 exhibit a divergent extent in which the separation dimension between the inner and outer edges 40, 41 gradually widens from the both side edges 34 of the core 29 toward the end edge 35, and the width dimension on the end edge 35 side of the core 29 is increased. It is larger than the width dimension on the side edges 34 of the core 29. Inner edges 40 of the bent portions 36 and 37 reach a vertical center line M1 that bisects the lateral dimension of the end portion 21 of the pad 20A from both side edges 34 of the core 29. The bent portions 36 and 37 are formed of a top sheet 26 and a back sheet 27 excluding the core 29. In the bent portions 36 and 37, the inner surfaces of the sheets 26 and 27 are fixed to each other with the front and back sheets 26 and 27 overlapping each other. The bending portions 36 and 37 have lower rigidity than the movable portion 38 and the main portion 39.

  The leak-proof sheet 28 is disposed inside the both side portions 22 of the pad 20A. The leak-proof sheet 28 is positioned outside the both side edges 35 of the core 29 and extends in the vertical direction, and extends in the vertical direction in parallel with the fixed part 42 and has a tendency to stand up above the top sheet 26. It is formed of a free portion 43 and fixed end portions 44 located in the front and rear regions 23 and 25 and lying inward in the lateral direction of the pad 20A. The fixed portion 42 and the free portion 43 extend between the front and rear regions 23 and 25 of the pad 20A. The fixed both end portions 44 are located on both end portions 21 of the pad 20 </ b> A and the movable portion 38 of the core 29.

  In the vicinity of the inner end of the free portion 43, a stretchable first elastic member 45 extending in the vertical direction is attached so as to be shrinkable. The first elastic member 45 is fixed to the free portion 43 in a state where the first elastic member 45 is extended in the vertical direction at a predetermined magnification. The longitudinal end portion 46 of the first elastic member 45 reaches the vicinity of the lateral inner end portion 47 of the movable portion 38 beyond the bent portions 36 and 37. In the leak-proof sheet 28, the free portion 43 contracts in the vertical direction by the contraction force of the first elastic member 45, a large number of gathers are formed in the free portion 43, and the free portion 43 stands up above the top sheet 26. (See FIG. 2). The free part 43 forms a barrier against excrement.

  Both end portions 21 are formed from end portions 48 and 49 of front and back sheet sheets 26 and 27 extending from the end edge 34 of the core 29 in the vertical direction outward direction, and a fixed end portion 44 of the leak-proof sheet 28. At both end portions 21, the end portions 48, 49 of the front and back sheets 26, 27 overlap the fixed end portion 44 of the leak-proof sheet 28, the inner surfaces of the front and back sheets 26, 27 are fixed, and the outer surface of the top sheet 26 The inner surface of the leak-proof sheet 28 is fixed. The fixed end portion 44 of the leak-proof sheet 28 is fixed not only to the both end portions 21 of the pad 20 </ b> A but also to the outer surface of the surface sheet 26 at the movable portion 38 of the core 29.

  A plurality of elastic second elastic members 50 extending in the lateral direction are attached to both end portions 21 so as to be contractible. The second elastic member 50 is disposed outward in the longitudinal direction of the edge 35 of the core 29. The second elastic member 50 is interposed between the front and back sheets 26 and 27, and is fixed to the inner surfaces of the sheets 26 and 27 in a state where the second elastic member 50 is expanded at a predetermined magnification in the lateral direction. Both end portions 21 are contracted in the lateral direction by the contraction force of the second elastic member 50, and a large number of gathers are formed there.

  Both side portions 22 are formed of side portions 51 and 52 of front and back sheets 26 and 27 extending laterally outward from the side edge 35 of the core 29 and a fixing portion 42 of the leak-proof sheet 28. In both side portions 22, the side portions 51 of the top sheet 26 slightly extend laterally outward from the side edges 35 of the core 29, and further laterally outward from the side portions 51 and the side portions 52 of the back sheet 27 and the leak-proof sheet. 28 fixed portions 42 extend. At both side portions 22, the side portions 51, 52 of the front and back sheets 26, 27 and the fixing portion 42 of the leak-proof sheet 28 are overlapped, and the inner surfaces of the front and back sheets 26, 27 are fixed to each other. The inner and outer surfaces and the inner surface of the leak-proof sheet 28 are fixed.

  In the pad 20A, as shown in FIGS. 2 and 4, the free portion 43 of the leak-proof sheet 28 is contracted in the vertical direction by the contraction force of the first elastic member 45, and both ends of the pad 20A are contracted by the contraction force of the second elastic member 50. The part 21 contracts in the horizontal direction, and accordingly, the movable part 38 of the core 29 is drawn toward the main part 39 and the movable parts 38 of the core 29 are drawn in the horizontal direction. The pad 20 </ b> A is bent at the bent portions 36 and 37, the movable portion 38 is positioned above the main portion 39 in the thickness direction of the pad 20 </ b> A, and the bent portions 36 and 36 are interposed between the movable portion 38 and the main portion 39. There is a step in the thickness direction across 37.

  The pad 20A has a three-dimensional structure in which the movable portion 38 is inclined upward from the bent portion 36, 37 toward both end portions 21 toward the pad 20A, and its front and rear regions 23, 25 are convex toward the non-skin contact side. It has been transformed into a shape. In the front and rear regions 23 and 25 of the pad 20A, the movable parts 38 of the core 29 approach each other in the lateral direction toward the longitudinal center line M1, and the leak-proof sheets 28 approach each other in the lateral direction toward the longitudinal center line M1. The leak-proof sheet 28 surrounds the main part 39 of the core 29 in the front and rear regions 23 and 25 from above.

  FIG. 6 is a perspective view of the pad 20 </ b> A shown in a state of being placed on the diaper cover 60. The pad 20 </ b> A is disposed inside a diaper cover 60 having front and rear waist areas 61 and 63 and a crotch area 62 positioned between the waist areas 61 and 63, and is attached to the wearer together with the cover 60. A pair of tape fasteners 64 is attached to the rear waist area 63 of the cover 60. A target tape 65 serving as a fastening area for the tape fastener 64 is attached to the front waist area 61 of the cover 60.

  The procedure for attaching the pad 20A to the wearer is as follows. With the back sheet 27 of the pad 20 </ b> A facing the inner surface of the diaper cover 60, the pad 20 </ b> A is placed inside the cover 60. When the pad 20A is placed on the diaper cover 60, the front area 23 of the pad 20A is located in the front waist area 61 of the cover 60, the rear area 25 of the pad 20A is located in the rear waist area 63 of the cover 60, The intermediate region 24 of 20A is located in the crotch region 62 of the cover 60. Next, after putting the wearer's buttocks on the rear region 25 of the pad 20A and placing the front waist region 61 of the cover 60 on the wearer's abdomen, both side portions of the rear waist region 63 of the cover 60 are moved forward. The tape fasteners 64 are fastened to the target tape 65, and the front and rear waist regions 61 and 63 are connected to each other on the outside of both sides of the waist region 61. Excretion excreted while the cover 60 is attached passes through the top sheet 26 of the pad 20A and is absorbed and held by the core 29.

  Since the pad 20A is deformed into a three-dimensional shape so that the front and rear regions 23 and 25 are convex toward the non-skin contact side, the front and rear regions 23 and 25 have the shape of the abdomen and buttocks of the wearer. It matches, there is no gap between the front and rear areas 23 and 25 of the pad 20A and the skin of the wearer, the excrement can be efficiently absorbed by the pad 20A, and excrement leaks from the end portions 21. Can be prevented.

  The pad 20A has a step between the movable portion 38 and the main portion 39 even though the fixed both end portions 44 of the leak-proof sheet 28 are lying inward in the lateral direction in the front and rear regions 23 and 25, and the pad 20A is movable. Since the portion 38 forms a barrier against the excrement, the excrement flowing on the top sheet 26 is prevented from flowing by the movable portion 38, and the excrement leaks from the both end portions 21 and the both side portions 22 of the front and rear regions 23, 25. Can be prevented. The excrement that has reached the movable part 38 from the main part 39 passes through the top sheet 26 and is absorbed by the movable part 38.

  In the pad 20A, the width dimension of the bent portions 36 and 37 located on the end edge 34 side of the core 29 is large, the bent portions 36 and 37 stand up on the end edge 34 side, and the leak-proof sheet 28 is provided in the front and rear region. Since the main part 39 of the core 29 in 23 and 25 is surrounded from above, the flow of excrement diffusing on the top sheet 26 is blocked by the bent parts 36 and 37, and the excrement is separated from the top sheet 26. It is hold | maintained between the leak-proof sheet | seats 28, and the leak of excrement from the both ends 21 and the both sides 22 of the front-back area 23,25 can be prevented reliably.

In the pad 20A, the rigidity values of the bent portions 36 and 37 are in the range of 0.01 to 2.0 mN · cm, and the rigidity value of the movable portion 38 and the main portion 39 is 9.0 to 50.0 mN · cm. Is in range. If the rigidity value of the bent portions 36 and 37 exceeds 2.0 mN · cm, the pad 20A becomes difficult to bend at the bent portions 36 and 37, and leakage is prevented by the contraction force of the first elastic member 45 and the second elastic member 50. Even if the free portion 43 of the sheet 28 and the both end portions 21 of the pad 20A contract, the movable portion 38 cannot be pulled toward the main portion 39 side, and the movable portions 38 cannot be pulled sideways, and the front and rear of the pad 20A. The areas 23 and 25 cannot be transformed into a three-dimensional shape. If the rigidity value of the movable portion 38 and the main portion 39 is less than 9.0 mN · cm, the movable portion 38 and the main portion 39 may be irregularly bent due to the contraction force of the first elastic member 45 or the second elastic member 50. Yes, not only can the front and rear regions 23 and 25 of the pad 20A be deformed into a three-dimensional shape, but also a large number of gathers are formed on the movable portion 38 and the main portion 39, and the front and rear regions 23 and 25 of the pad 20A are worn. A gap is formed between the person's skin and the pad 20A cannot efficiently absorb excrement. In addition, the rigidity value of the bending parts 36 and 37, the movable part 38, and the main part 39 was measured based on the Taber method (JISP8125). The measurement method is as follows.
(1) While pressing the pattern on the pad 20A, the movable part 38 is cut from the pad 20A to create a first sample of 70 mm × 38.1 mm, and the main part 39 is cut from the pad 20A to a size of 70 mm × 38.1 mm. Create a second sample. Next, the top sheet 26 and the back sheet 27 are peeled off from the first and second samples, and the core 29 covered with the tissue paper is exposed. The pad 20A has a small area of the bent portion 36, and even if the bent portion 36 is cut out from the pad 20A, it cannot be made the same size as the first and second samples. Therefore, the same front and back sheets as the front and back sheets 26 and 27 used for the pad 20A were fixed, and a third sample for measuring the rigidity value of the bent portion 36 of 70 mm × 38.1 mm was separately prepared. For the measurement of the stiffness value, a Taber stiffness tester manufactured by Yasuda Seiki Seisakusho was used, and the stiffness values of the first to third samples in the vertical direction and the horizontal direction were measured.
(2) Next, the measurement procedure will be described. (a) The thickness (A) of the first to third samples is measured. (b) Insert the sample so that it touches the center of the chuck (lower side) of the testing machine. (c) The sum of the left and right gaps between the support roller and the sample is adjusted to (A) × 0.80 (mm). (d) Put the auxiliary weight 1/2 on top. (e) Rotate the sample left and right, stop at the point where the 15 ° support line and the center mark of the pendulum coincide, and read the scale on the testing machine. The numerical value on the left side of the scale is (B), and the numerical value on the right side of the scale is (C).
(3) The stiffness value of the sample was calculated by the formula: stiffness value (N · cm) = ((B) + (C)) / 2 × (auxiliary weight coefficient) /1000×9.807. The calculated vertical and horizontal rigidity values of the first and second samples are 0.09 to 0.5 N · cm, and the calculated vertical and horizontal rigidity values of the third sample are 0.0001 to 0.22 N · cm. . The stiffness value of the first sample is the stiffness value of the movable portion 38, the stiffness value of the second sample is the stiffness value of the main portion 39, and the stiffness value of the third sample is the stiffness value of the bent portion 36.

  In the pad 20A, the inclination angle θ of the bent portions 36 and 37 with respect to the vertical center line M1 is in the range of 20 to 70 °. The inclination angle θ is preferably in the range of 40 to 50 °. The inclination angle θ of the bent portions 36 and 37 with respect to the vertical center line M1 is as shown in FIG. 1 when the virtual line M2 drawn at the center of the bent portions 36 and 37 intersects with the vertical center line M1. Is an angle. When the angle of inclination θ of the bent portions 36 and 37 is less than 20 °, the bent portions 36 and 37 extend in the longitudinal direction of the pad 20A and the area of the movable portion 38 increases, and the movable portion 38 is movable by the contraction force of the first elastic member 45. The portion 38 cannot be pulled toward the main portion 39, and the front and rear regions 23 and 25 of the pad 20A cannot be deformed into a three-dimensional shape. When the inclination angle θ of the bent portions 36 and 37 exceeds 70 °, the bent portions 36 and 37 extend in the lateral direction of the pad 20A and the area of the movable portion 38 is reduced. Even if the movable portion 38 is inclined above the pad 20A, the front and rear regions 23 and 25 of the pad 20A cannot be deformed into a three-dimensional shape.

In the pad 20 </ b> A, the elongation stress at the time of 93% elongation of the free portion 43 of the leak-proof sheet 28 including the first elastic member 45 is in the range of 0.15 to 0.50 N. Since the first elastic member 45 is fixed to the free part 43 of the leak-proof sheet 28, the contraction force is suppressed by the rigidity of the free part 43. However, since the elongation stress of the free portion 43 is in the above range, the contraction force of the first elastic member 45 is sufficiently applied, and the contraction force of the first elastic member 45 causes the movable portion 38 of the core 29 to move to the main portion 39 side. Can be surely drawn to. When the elongation stress of the free portion 43 is less than 0.15 N, the contraction force of the first elastic member 45 is weak, and the movable portion 38 of the core 29 cannot be pulled toward the main portion 39 side, and the front and rear regions 23, 25 cannot be transformed into a three-dimensional shape. When the elongation stress of the free portion 43 exceeds 0.50 N, the contracting force of the first elastic member 45 causes the both end portions 21 of the pad 20A to stand upright or fall down toward the intermediate region 24 together with the movable portion 38 of the core 29. In some cases, the front and rear regions 23 and 25 of the pad 20A cannot be deformed into a three-dimensional shape. The elongation stress of the free part 43 of the leak-proof sheet 28 was measured by the following method.
(1) The free part 43 (including the first elastic member 45) of the leak-proof sheet 28 is cut out from the pad 20A, and a sample for measuring an elongation stress having a vertical dimension of 450 to 530 mm and a horizontal dimension of 20 to 50 mm is created. A tensile tester manufactured by Shimadzu Corporation was used to measure the elongation stress of the free part.
(2) Both ends in the longitudinal direction of the sample contracted by the contraction of the first elastic member 45 are clamped by a chuck of a tensile tester (sample clamping dimension of the chuck: about 10 mm, the sample against the contraction force of the elastic member) The dimension between the chucks of the sample when stretched in the vertical direction: about 430 to 510 mm), the sample is pulled in the vertical direction at a speed of 100 mm / min, the sample is stretched to 93%, and then the stretched state is released. Again, the sample is pulled longitudinally through the testing machine at a speed of 100 mm / min, the sample is stretched to 93%, the force applied to the testing machine at that time is measured, and the measured value is free of the leak-proof sheet 28. The elongation stress of the portion 43 was taken. Here, elongating the sample to 93% is, for example, about 399.times., Which is a value obtained by multiplying the sample by 430 mm by 0.93 when the sample has a chuck-to-chuck dimension of 430 mm. It is to extend to 9 mm.

  7 and 8 are a partially broken perspective view of a disposable pad 20B shown as another example, and a perspective view of the pad 20B of FIG. 9 and 10 are a sectional view taken along line 9-9 in FIG. 8 and a sectional view taken along line 10-10 in FIG. 8, and FIG. 11 is a sectional view taken along line 11-11 in FIG. is there. FIG. 7 shows the pad 20 </ b> B in a state where the pad 20 </ b> B is developed in the vertical and horizontal directions against the contraction force of the elastic member 45. In FIG. 8, the horizontal direction is indicated by an arrow L, the vertical direction is indicated by an arrow M, and the thickness direction is indicated by an arrow N.

  The pad 20B has both end portions 21 extending in the horizontal direction, both side portions 22 extending in the vertical direction, and has a front region 23 and a rear region 25, and an intermediate region 24 positioned between the front and rear regions 23, 25. . The pad 20B is interposed between the liquid-permeable top sheet 26 and the liquid-impervious back sheet 27, a pair of liquid-impervious leak-proof sheets 28 extending in the vertical direction, and the front and back sheets 26, 27. The liquid-absorbent core 29 is joined to the inner surfaces of 26 and 27.

  The topsheet 26 is formed from the same hydrophilic fiber nonwoven fabric 30 as that in FIG. The back sheet 27 is formed from the same composite sheet as that of FIG. The leak-proof sheet 28 is formed from the same hydrophobic fiber nonwoven fabric 33 as that of FIG. The core 29 is the same mixture as that of FIG. 1 and extends between the front and rear regions 23 and 25. The core 29 has both end edges 34 extending in the horizontal direction and both side edges 35 extending in the vertical direction.

  The rear region 25 is formed with a pair of bent portions 37 extending so as to gradually approach each other from the both side edges 35 of the core 29 located on the intermediate region 24 side toward the end edge 34. The core 29 is divided into a pair of movable parts 38 positioned on the outer side in the vertical direction of the bent part 37 with the bent part 37 interposed therebetween, and a main part 39 positioned on the inner side in the vertical direction of the bent part 37. Yes.

  The bent portion 37 has an inner edge 40 located on the main portion 39 side and an outer edge 41 located on the movable portion 38 side. In the bent portion 37, the inner edge 40 and the outer edge 41 extend in parallel to each other. The bent portion 37 is formed by the front and back sheets 26 and 27 and the core 29, and the rigidity thereof is lower than the rigidity of the movable portion 38 and the main portion 39. In the bent portion 37, the thickness dimension of the core 29 is smaller than that of the core 29 in the movable portion 38 and the main portion 39, and the density and basis weight of the core 29 in the bent portion 37 are the movable portion 38 and the main portion 39. And lower than those of the core 29. Therefore, the rigidity of the core 29 in the bent portion 37 is lower than that of the core 29 in the movable portion 38 and the main portion 39.

  The thickness dimension of the core 29 in the bent portion 37 is the same as that of the core 29 in the movable portion 38 and the main portion 39, and the density and basis weight of the core 29 in the bent portion 37 are set to the movable portion 38 and the main portion 39. And lower than those of the core 29. Since the density and basis weight of the core 29 in the bent portion 37 are lower than those of the core 29 in the movable portion 38 and the main portion 39, the rigidity of the core 29 located in the bent portion 37 as a result is the movable portion 38. Therefore, the rigidity of the bent portion 37 can be made lower than that of the movable portion 38 and the main portion 39.

  Conversely, the density and basis weight of the core 29 in the bent portion 37 are the same as those of the core 29 in the movable portion 38 and the main portion 39, and the thickness dimension of the core 29 in the bent portion 37 is the same as that of the movable portion 38 and the main portion. You may make it smaller than that of the core 29 in the part 39. FIG. Since the thickness dimension of the core 29 in the bent portion 37 is smaller than that of the core 29 in the movable portion 38 and the main portion 39, the rigidity of the core 29 located in the bent portion 37 is consequently reduced. Therefore, the rigidity of the bent portion 37 can be made lower than that of the movable portion 38 and the main portion 39.

  The leak-proof sheet 28 is positioned outside the both side edges 35 of the core 29 and extends in the vertical direction, the free portion 43 extending in the vertical direction with a standing orientation above the top sheet 26, and the front and rear regions 23, 25 and fixed both end portions 44 lying inward in the lateral direction of the pad 20B. The fixed both end portions 44 are located on both end portions 21 of the pad 20 </ b> B and the movable portion 38 of the core 29. Above the free portion 43, a stretchable first elastic member 45 extending in the longitudinal direction is attached so as to be shrinkable. Both longitudinal end portions 46 of the first elastic member 45 reach the vicinity of the lateral inner end portion 47 of the movable portion 38 beyond the bent portion 37. In the leak-proof sheet 28, the free part 43 contracts in the vertical direction by the contraction force of the first elastic member 45, and the free part 43 stands up above the top sheet 26 (see FIG. 8).

  Both end portions 21 are formed from end portions 48 and 49 of front and back sheet sheets 26 and 27 extending from the end edge 34 of the core 29 in the vertical direction outward direction, and a fixed end portion 44 of the leak-proof sheet 28. At both end portions 21, the end portions 48 and 49 overlap the fixed end portion 44, the inner surfaces of the front and back sheets 26 and 27 are fixed to each other, and the outer surface of the surface sheet 26 and the inner surface of the leak-proof sheet 28 are fixed to each other. . The fixed end portion 44 of the leak-proof sheet 28 is fixed not only to the both end portions 21 of the pad 20 </ b> B but also to the outer surface of the top sheet 26 at the movable portion 38.

  Both side portions 22 are formed of side portions 51 and 52 of front and back sheets 26 and 27 extending laterally outward from the side edge 35 of the core 29 and a fixing portion 42 of the leak-proof sheet 28. In the both side portions 22, the side portions 51 slightly extend laterally outward from the side edges 35 of the core 29, and the side portions 52 and the fixing portions 42 extend further laterally outward from the side portions 51. At both side portions, the side portions 51 and 52 and the fixing portion 42 overlap each other, the inner surfaces of the front and back sheets 26 and 27 are fixed to each other, and the inner and outer surfaces of the front and rear sheets 26 and 27 and the inner surface of the leak-proof sheet 28 are fixed. ing.

  In the pad 20B, the free portion 43 of the leak-proof sheet 28 is contracted in the vertical direction by the contraction force of the first elastic member 45, and accordingly, the movable portion 38 of the core 29 is drawn toward the main portion 39 side. The movable parts 38 are attracted in the lateral direction. The pad 20 </ b> B is bent at the bent portion 37, the movable portion 38 is positioned above the main portion 39 in the thickness direction, and the step is increased in the thickness direction with the bent portion 37 interposed between the movable portion 38 and the main portion 39. Has occurred.

  The pad 20B is deformed into a three-dimensional shape in which the movable portion 38 is inclined upward from the bent portion 37 toward the both end portions 21 toward the both ends 21 and the rear area 25 is convex toward the non-skin contact side. Yes. In the rear region 25 of the pad 20B, the movable portions 38 of the core 29 approach each other in the lateral direction, and the leak-proof sheets 28 approach each other in the lateral direction, so that the leak-proof sheet 28 is the main portion 39 of the core 29 in the rear region 25. Is surrounded from above.

  The pad 20B is disposed inside the diaper cover, similar to that of FIG. 1, and is attached to the wearer together with the cover (see FIG. 5). The procedure for attaching the pad 20B to the wearer is the same as that shown in FIG. 1, and a description thereof will be omitted.

  Since the pad 20B is deformed into a three-dimensional shape so that the rear region 25 is convex toward the non-skin contact side, the rear region 25 matches the shape of the wearer's buttocks, and the back of the pad 20B. There is no gap between the region 25 and the wearer's skin, and the pad 20B can efficiently absorb excrement, and the excrement leaking from the end 21 can be prevented.

  In the pad 20B, although the fixed both end portions 44 of the leak-proof sheet 28 are lying inward in the lateral direction in the rear region 25, a step is generated between the movable portion 38 and the main portion 39, and the movable portion 38 Forms a barrier against excrement, so that the excrement flowing on the top sheet 26 is prevented from flowing by the movable portion 38, thereby preventing the excrement from leaking from the end portion 21 and the side portions 22 of the rear region 25. it can. The excrement that has reached the bent portion 37 and the movable portion 38 from the main portion 39 passes through the top sheet 26 and is absorbed by the bent portion 37 and the movable portion 38. In the pad 20 </ b> B, the leak-proof sheet 28 surrounds the main portion 39 of the core 29 in the rear region 25 from above, so that excrement that diffuses on the top sheet 26 is between the top sheet 26 and the leak-proof sheet 28. It is hold | maintained and the leakage of the excrement from the both ends 22 of the edge part 21 or the rear region 25 can be prevented reliably.

  In the pad 20B, the bending portion 37 has a stiffness value in the range of 0.01 to 2.0 mN · cm, and the movable portion 38 and the main portion 39 have a rigidity value in the range of 9.0 to 50.0 mN · cm. is there. When the rigidity value of the bent portion 37 exceeds 2.0 mN · cm, the pad 20B is not easily bent at the bent portion 37, and the free portion 43 of the leak-proof sheet 28 is contracted by the contraction force of the first elastic member 45. However, the movable portion 38 cannot be pulled toward the main portion 39 side, and the movable portions 38 cannot be pulled sideways, and the rear region 25 of the pad 20B cannot be deformed into a three-dimensional shape. If the rigidity value of the movable portion 38 and the main portion 39 is less than 9.0 mN · cm, the movable portion 38 and the main portion 39 may be irregularly bent due to the contraction force of the first elastic member 45, and the back of the pad 20 </ b> B. Not only can the area 25 be deformed into a three-dimensional shape, but a large number of gathers are formed in the movable part 38 and the main part 39, and a gap is created between the rear area 25 of the pad 20B and the skin of the wearer. The pad 20B cannot absorb the excrement efficiently.

  The rigidity values of the bent portion 37, the movable portion 38, and the main portion 39 were measured according to the Taber method (JIS P 8125). The measuring method is the same as that of FIG. The pad 20B has a small area of the bent portion 36, and even if the bent portion 36 is cut out from the pad 20B, it cannot be made the same size as the first and second samples. Therefore, a third sample for measuring the rigidity value of the bent portion 36 was prepared separately. The third sample is a 70 mm × 38.1 mm core having the same density and basis weight of the core 29 in the pad 20 </ b> B, and the entire core is covered with tissue paper.

  In the pad 20B, the inclination angle θ of the bent portion 37 with respect to the vertical center line M1 is in the range of 20 to 70 °. When the angle of inclination θ of the bent portion 37 is less than 20 °, the bent portion 37 extends in the longitudinal direction of the pad 20B and the area of the movable portion 38 increases, and the movable portion 38 is mainly used by the contraction force of the first elastic member 45. The rear area 25 of the pad 20B cannot be changed to a three-dimensional shape. When the inclination angle θ of the bent portion 37 exceeds 70 °, the bent portion 37 extends in the lateral direction of the pad 20B and the area of the movable portion 38 is reduced, and the movable portion 38 is moved by the contraction force of the first elastic member 45. Even if the pad 20B is inclined upward, the rear region 25 of the pad 20B cannot be deformed into a three-dimensional shape.

  In the pad 20B, the elongation stress at the time of 93% elongation of the free portion 43 of the leak-proof sheet 28 including the first elastic member 45 is in the range of 0.15 to 0.50N. When the elongation stress of the free portion 43 is less than 0.15 N, the contraction force of the first elastic member 45 is weak, and the movable portion 38 cannot be pulled toward the main portion 39, and the rear region 25 of the pad 20B is three-dimensional. It cannot be transformed into a shape. When the elongation stress of the free portion 43 exceeds 0.50 N, the contracting force of the first elastic member 45 may cause the end portions 21 of the pad 20B to stand upright or fall down together with the movable portion 38 toward the intermediate region 24. . In addition, the measuring method of the extensional stress of the free part 43 is the same as that of FIG.

  In addition to the hydrophilic fiber nonwoven fabric, any one of a hydrophobic fiber nonwoven fabric having a large number of apertures and a plastic film having a large number of fine apertures can be used for the topsheet 26. For the back sheet 27, any one of a hydrophobic fiber nonwoven fabric, a gas-permeable liquid-impermeable plastic film, and a composite nonwoven fabric obtained by laminating two or more hydrophobic fiber nonwoven fabrics can be used. For the back sheet 27 and the leak-proof sheet 28, a composite nonwoven fabric (SM nonwoven fabric, SMS nonwoven fabric, SMMS) in which a spunbond nonwoven fabric having high strength and good flexibility is superposed on both sides or one side of a melt-blown nonwoven fabric having high water resistance. Nonwoven fabric) can also be used.

  As the fiber nonwoven fabric, one produced by each method of spun lace, needle punch, melt blown, thermal bond, spun bond, and chemical bond can be used. Polyester-based, polyacrylonitrile-based, polyvinyl chloride-based, polyethylene-based, polypropylene-based, and polystyrene-based fibers can be used for the constituent fibers of the nonwoven fabric. As the constituent fibers, core-sheath type composite fibers, parallel type composite fibers, atypical hollow fibers, microporous fibers, and bonded type composite fibers can also be used.

  For adhesion between the front and back sheets 26, 27, bonding of the core 29 to the sheets 26, 27, fixing of the leak-proof sheet 28 to the sheets 26, 27, and fixing of the elastic members 45, 50 to the sheets 26, 27, 28 It is possible to use a welding means by heat such as an agent or heat seal or sonic seal. As the adhesive, a hot-melt adhesive, an acrylic adhesive, or a rubber adhesive can be used.

  The adhesive is preferably applied to the top sheet 26, the back sheet 27, and the leak-proof sheet 28 in any of spiral, wave, zigzag, dot, and stripe forms. When the adhesive is applied to the sheets 26, 27, and 28 in these modes, an application area where the adhesive is applied to the sheets 26, 27, and 28 and a non-application area where the adhesive is not applied are formed. The sheets 26, 27, 28 are intermittently fixed to each other, the core 29 is intermittently joined to the sheets 26, 27, and the elastic members 45, 50 are intermittently fixed to the sheets 26, 27, 28.

The partially broken top view of a disposable pad. FIG. 2 is a perspective view of the pad of FIG. 1 in a state of being left naturally. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a sectional view taken along line 4-4 in FIG. FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. The perspective view of the pad shown in the state put on the diaper cover. The partially broken top view of the disposable pad shown as another example. FIG. 8 is a perspective view of the pad of FIG. 7 in a state of being left naturally. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 8. FIG. 10 is a cross-sectional view taken along line 10-10 in FIG. FIG. 11 is a cross-sectional view taken along line 11-11 in FIG. 8.

Explanation of symbols

20A Disposable pad (disposable waste disposal article)
20B Disposable pad (disposable excrement disposal article)
21 both ends 22 both sides 23 front region 24 middle region 25 rear region 26 liquid-permeable surface sheet 27 liquid-impermeable back sheet 28 liquid-impermeable leak-proof sheet 29 liquid-absorbent core 34 both-ends edge 35 both-side edge 36 bending Part 37 Bent part 38 Movable part 39 Main part 42 Fixed part 43 Free part 44 Fixed both ends 45 Elastic first elastic member 46 Longitudinal end part θ Inclination angle

Claims (5)

Liquid-permeable surface located on the skin contact surface side in the longitudinal and lateral directions, the skin contact surface side and the non-skin contact surface side, the intermediate region located between the front region, the rear region, and the front and back region and a liquid-impervious backsheet positioned on the sheet and non-skin facing side, a pair of liquid-impervious leak-barrier sheets extending in the longitudinal direction spaced opposite to the transverse direction, of the table backsheet A liquid-absorbing core interposed between the front and rear regions, and the leak-proof sheet is positioned between the front and rear regions and extends in the vertical direction, and in parallel with the fixed portion. Stretchable first elastic member that is formed of a free portion that extends in the direction and has a propensity to stand upward above the face sheet, and a fixed end portion that is located in the front-rear region and that has fallen laterally, and extends in the longitudinal direction. In the disposable excrement disposal article attached to the free part of the leak-proof sheet so as to be shrinkable,
In at least one of the front and rear regions, a pair of bent portions extend from both side edges of the core located on the intermediate region side to the edge of the core so as to gradually approach each other. The part gradually becomes wider from the both side edges of the core toward the edge of the core,
The core is divided into a pair of movable parts located on the outer side in the longitudinal direction of the bent part and a main part located on the inner side in the vertical direction of the bent part, and the rigidity of the bent part is Lower than the rigidity of the movable part and the main part, the stiffness value of the bent part by the Taber method is in the range of 0.01 to 2.0 mN · cm, the rigidity of the movable part and the main part by the Taber method The value is in the range of 9.0 to 50.0 mN · cm,
In the article, the fixed end portion of the leak-proof sheet is positioned on the movable portion, and the first elastic member extends across the bent portion to the movable portion and extends and contracts in the lateral direction. The elastic second elastic member is attached so as to be contractible outward in the longitudinal direction of the edge of the core, and the movable part is arranged on the side of the main part by the contraction force of the elastic first and second elastic members. The article is characterized in that the article is drawn inwardly in a lateral direction.   The article according to claim 1, wherein an inclination angle of the bent portion with respect to a longitudinal center line that bisects a lateral dimension of the article is in a range of 20 to 70 °.   The article according to claim 1 or 2, wherein an elongation stress at 93% elongation of a free portion of the leak-proof sheet including the first elastic member is in a range of 0.15 to 0.50N. The article according to any one of claims 1 to 3, wherein the bent portion is formed from the top sheet and the back sheet excluding the core. The bent portion is formed from said table backsheet and said core, said stiffness of said core in the bent portion, the movable portion and said core lower claim than the stiffness of the a main portion 1-4 The article according to any one of the above.

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