Disposable wearing article

Abstract

The present invention relates to a disposable wearing article. A wearing article having an opening region which is easily expanded at the time of wearing and is not easily misaligned in a worn state is provided. The disposable wearing article has an opening region, and the opening region is provided with an elastic sheet formed of a laminated sheet including an elastic sheet, and the elastic sheet has an elastic retention rate of 80% or more, which is determined by the following tensile test: (1) a first cycle is performed, the first cycle including a first forward path and a first return path, (2) after the first cycle, a second cycle is performed, the second cycle including a second forward path and a second return path, and (3) the elastic retention rate is calculated as a ratio of a tensile force at 50% of elongation in the second return path to a tensile force at 50% of elongation in the first forward path.

Description

Technical Field

[0001] This disclosure relates to a disposable wearable item. Background Technology

[0002] In disposable clothing items such as disposable diapers, elastic components such as elastic bands and stretch non-woven fabrics are often used.

[0003] For example, Patent Document 1 discloses the following composite sheet as a stretchable nonwoven fabric.

[0004] A composite sheet comprising: a non-stretchable sheet; a stretchable nonwoven fabric containing at least partially extended thermoplastic fibers and elastomer fibers different from the thermoplastic fibers, wherein a plurality of sparse and dense strip regions formed along a first direction are alternately and continuously formed on both sides of the stretchable nonwoven fabric in a second direction orthogonal to the first direction, and the dense strip regions on one side are alternately arranged with the dense strip regions on the other side in the second direction; and an adhesive portion for bonding the non-stretchable sheet to the stretchable nonwoven fabric.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: International Publication No. 2008 / 066009 Summary of the Invention

[0008] The problem the invention aims to solve

[0009] Elastic components such as elastic bands and stretch nonwoven fabrics, when the x-axis and y-axis are set as elongation and tensile force respectively, tend to have a lower tensile force during contraction (return path) than during extension (forward path). To prevent clothing from slipping off, elastic components are mostly designed based on a relatively low tensile force during contraction. That is, in clothing, the opening area requires a relatively high tensile force to extend during wear, making it difficult to expand and wear. This is especially true in summer, when the wearer's skin is wet with sweat, increasing friction between the clothing and the skin, making the clothing even more difficult to put on.

[0010] In addition, the aforementioned elastic member tends to have a decreased tensile force when it stretches and contracts again due to repeated stretching and contraction, and is prone to slipping off when worn.

[0011] Therefore, the purpose of this disclosure is to provide a garment in which the opening area is easy to expand when worn and is not easily misaligned when worn.

[0012] Solution for solving the problem

[0013] The present discloses a disposable wearable article having an opening area, characterized in that the wearable article has a stretch piece in the opening area, the stretch piece being formed from a laminate containing an elastic sheet, the elastic sheet being obtained by molding an elastic resin material with thermoplastic elastic resin as the main component into a sheet shape, the stretch piece having an elasticity retention rate of more than 80%, the elasticity retention rate being determined by the following tensile test: (1) performing a first cycle, the first cycle comprising a first forward path in which the stretch piece is stretched by 80% at a speed of 300 mm / min and a first return path in which the stretch piece is returned to 0% at the same speed; (2) following the first cycle, performing a second cycle, the second cycle comprising a second forward path in which the stretch piece is stretched by 80% again at a speed of 300 mm / min and a second return path in which the stretch piece is returned to 0% at the same speed; (3) calculating the elasticity retention rate as the ratio of the tensile force when the stretch piece is stretched by 50% on the second return path to the tensile force when the stretch piece is stretched by 50% on the first forward path.

[0014] The effects of the invention

[0015] In the clothing items disclosed herein, the opening area is easy to expand when worn and is not easily misaligned when worn. Attached Figure Description

[0016] Figure 1 This is a diagram illustrating the shorts-type diaper 1 of the first embodiment.

[0017] Figure 2 This is a diagram illustrating the shorts-type diaper 1 of the first embodiment.

[0018] Figure 3 This is a diagram illustrating the shorts-type diaper 1 of the first embodiment.

[0019] Figure 4 This is a diagram illustrating the shorts-type diaper 1 of the first embodiment.

[0020] Figure 5 This is a diagram illustrating the shorts-type diaper 1 of the first embodiment.

[0021] Figure 6 This is a diagram illustrating the shorts-type diaper 1 of the first embodiment.

[0022] Figure 7 This is a graph showing the tensile test results of the expansion joint No.1 in Example 1.

[0023] Figure 8 The graph shows the tensile test results of Comparative Example 1, stretchable nonwoven fabric No. 1.

[0024] Figure 9The graph shows the tensile test results of nonwoven fabric No. 1 containing elastic threads, which is Comparative Example 2.

[0025] Figure 10 The graph shows the tensile test results of stretch membrane No. 1 in Comparative Example 3.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Shorts-style diaper; 3. Outer body; 5. Absorbent body; 7. Locking part; 9. Left locking part; 11. Right locking part; 13. Waist opening; 15. Leg opening; 17. Elastic piece; 19. Front elastic piece; 20. Back elastic piece; 21. Front outer piece; 23. Front inner piece; 25. Front fold-back piece; 27. Back outer piece; 29. ​​Back inner piece; 31. Back fold-back piece; 33. Front elastic piece; 51. Back elastic piece; FP, Front part; RP, Back part; WR, Waist area; FWR, Front waist area; RWR, Back waist area; CR, Leg area. Detailed Implementation

[0028] Specifically, this disclosure relates to the following technical solutions.

[0029] [Technical Solution 1]

[0030] A disposable garment having an opening area, characterized in that,

[0031] The garment has a stretch tab in the opening area. The stretch tab is formed from a laminate containing an elastic sheet. The elastic sheet is obtained by molding an elastic resin material, primarily composed of thermoplastic elastic resin, into a sheet shape. The stretch tab has an elasticity retention rate of over 80%, which is determined by the following tensile test:

[0032] (1) Perform the first cycle, which includes a first forward path that extends the telescopic piece by 80% at a speed of 300 mm / min and a first return path that returns the telescopic piece to 0% at the same speed.

[0033] (2) Following the first cycle, a second cycle is performed, which includes a second forward path that extends the telescopic piece by 80% again at a speed of 300 mm / min and a second return path that returns the telescopic piece to 0% at the same speed.

[0034] (3) The elastic retention rate is calculated as the ratio of the tensile force when the elongation is 50% on the second return path to the tensile force when the elongation is 50% on the first forward path.

[0035] In the aforementioned garment, a stretchable piece with a predetermined elastic retention rate is provided in the opening area. This elastic retention rate is calculated as the ratio (percentage) of the tensile force when the garment extends by 50% on the second return path to the tensile force when the garment extends by 50% on the first forward path. "Tensile force when the garment extends by 50% on the first forward path" corresponds to the "extension force" that causes the opening area of ​​the garment to extend when it is worn, and "tensile force when the garment extends by 50% on the second return path" corresponds to the "contraction force" that causes the opening area to contract when the garment is worn. The predetermined elastic retention rate refers to a small difference between the "extension force" that causes the opening area of ​​the garment to extend when it is worn and the "contraction force" that causes the opening area to contract when the garment is worn.

[0036] Therefore, even when the elasticity of the opening area with the elastic tab is designed based on the contraction force (tension force on the second return path) during wearing, the elongation force (tension force on the first forward path) during wearing is not likely to increase. In addition, in the above-mentioned garment, the elastic tab with a predetermined elasticity retention rate is provided in the opening area, so the contraction force (tension force on the second return path) of the opening area is not likely to decrease over time.

[0037] Therefore, in the aforementioned garments, the opening area is easy to expand when worn and is not easily misaligned while in the wearing state.

[0038] In addition, in this instruction manual, "when wearing" means when the wearer is wearing the new garment, and "wearing state" means the state in which the wearer is wearing the garment.

[0039] [Technical Solution 2]

[0040] According to the wearable item described in technical solution 1, wherein,

[0041] The telescopic piece has an elasticity retention rate of over 90%.

[0042] In the aforementioned garment, the stretch piece has a predetermined elastic retention rate, so in the aforementioned garment, the opening area is easy to expand when worn and is not easily misaligned when worn.

[0043] [Technical Solution 3]

[0044] The wearable article according to technical solution 1 or 2, wherein,

[0045] The opening area is a waist area with a waist opening.

[0046] In the aforementioned garment, the opening area is a waist area with a waist opening. Therefore, in the aforementioned garment, the waist area is easy to expand when worn and does not easily slip off when worn.

[0047] [Technical Solution 4]

[0048] According to the wearable item described in technical solution 3, wherein,

[0049] The telescopic piece is configured to connect with the waist opening.

[0050] In the aforementioned garment, the elastic band is configured to connect with the waist opening. Therefore, when worn, the portion of the garment near the waist opening easily expands to a greater extent, making it easy to put on. Furthermore, the elasticity of the portion of the waist area near the waist opening does not easily decrease over time, thus preventing the garment from slipping down when worn.

[0051] [Technical Solution 5]

[0052] The wearable article according to technical solution 3 or 4, wherein,

[0053] The wearable item also includes an absorbent core.

[0054] The garment has the stretch tab in such a way that it does not overlap with the absorbent core in the thickness direction when it is in its unfolded state.

[0055] The aforementioned garment has an absorbent core at a predetermined position, so the stretching and contraction of the elastic band is not easily obstructed by the absorbent core. Therefore, in the aforementioned garment, the waist area is easy to expand when worn and does not easily slip off when worn.

[0056] [Technical Solution 6]

[0057] According to the wearable item described in technical solution 5, wherein,

[0058] The garment also includes an absorbent body comprising at least a liquid-permeable sheet and the absorbent core.

[0059] The garment has the stretch tab in such a way that it does not overlap with the absorbent body in the thickness direction when it is unfolded.

[0060] The aforementioned garment has an absorbent core at a predetermined position, so the expansion and contraction of the stretching piece is not easily hindered by the absorbent core. Therefore, in the aforementioned garment, the waist area is easy to expand when worn and does not easily slip off when worn.

[0061] [Technical Solution 7]

[0062] The wearable article according to any one of technical solutions 3 to 6, wherein...

[0063] The garment is a shorts-style garment, having a waistline and a height direction perpendicular to the waistline, and comprising a front portion, a back portion, and a pair of leg openings.

[0064] The garment has a pair of locking parts in the waist area, which are formed by fusing a nonwoven fabric containing heat-fused fibers constituting the front part and a nonwoven fabric constituting the back part, and extend from the waist opening to the pair of leg openings.

[0065] The stretch piece is a laminate of the elastic piece and the nonwoven fabric, and the stretch piece is disposed on one or both of the pair of locking portions.

[0066] In the aforementioned garment, the telescopic piece is disposed on one or both of a pair of locking parts.

[0067] In the aforementioned garment, a stretchable piece with a predetermined elastic retention rate is provided in the waist area, so that the waist area can be expanded with relatively little force when worn, and therefore the pair of locking parts are not easily damaged when worn.

[0068] Furthermore, in the aforementioned garment, the composition of the elastic resin material constituting the stretch piece is different from the composition of the heat-fused fibers constituting the nonwoven fabric. Therefore, the elastic resin material in the stretch piece functions in a way that reduces the strength of the locking portion formed by fusing the nonwoven fabric.

[0069] Therefore, when the above-mentioned garment is worn, the pair of locking parts are not easily damaged, making it easy to wear. In addition, when discarded, the pair of locking parts are easy to break, making it easy to discard.

[0070] [Technical Solution 8]

[0071] According to the wearable item described in technical solution 7, wherein,

[0072] The nonwoven fabric contains 50% to 100% by mass of the heat-melting fibers.

[0073] In the aforementioned garment, the nonwoven fabric contains heat-bonding fibers at a predetermined mass ratio. Therefore, the locking strength of the portion of the pair of locking parts without the stretch tab can be relatively increased, while the locking strength of the portion with the stretch tab can be relatively decreased. Consequently, the difference in locking strength between the portion without the stretch tab and the portion with the stretch tab can be increased. This makes the garment easier to wear because the pair of locking parts are less prone to damage, and also makes it easier to discard the garment when it is no longer needed.

[0074] [Technical Solution 9]

[0075] The wearable article according to technical solution 7 or 8, wherein,

[0076] The nonwoven fabric is selected from the group consisting of hot-air nonwoven fabric, spunbond nonwoven fabric, dot-bonded nonwoven fabric, needle-punched nonwoven fabric, meltblown nonwoven fabric and SMS nonwoven fabric.

[0077] In the aforementioned garment, the nonwoven fabric is selected from a predetermined group, thus the waist area of ​​the garment expands easily when worn and does not easily slip off while in use. Furthermore, the pair of locking parts are not easily damaged during wear, making the garment easy to put on; and the pair of locking parts are easy to break when discarded, making it easy to dispose of.

[0078] [Technical Solution 10]

[0079] The wearable article according to any one of technical solutions 7 to 9, wherein,

[0080] The stretch tab is disposed in a high-sheet area of ​​the nonwoven fabric constituting the pair of locking parts, where the number of sheets is relatively large.

[0081] In a pair of locking sections, the area with a relatively higher number of sheets tends to have higher locking strength compared to the area with a relatively lower number of sheets. As a result, the locking strength of a pair of locking sections varies depending on the location, and sometimes it is difficult to break the pair of locking sections when discarding clothing.

[0082] In the aforementioned garment, the telescopic tab is positioned in the high-tension area of ​​the pair of locking parts, thereby reducing the locking strength in the high-tension area and minimizing variations in the locking strength of the pair of locking parts depending on the location. Consequently, the aforementioned garment is prone to breakage of the pair of locking parts upon disposal, making it easy to discard.

[0083] [Technical Solution 11]

[0084] The garment according to any one of technical solutions 7 to 10, wherein,

[0085] The telescopic piece is disposed in a predetermined telescopic piece configuration area extending along the waist direction and the height direction in the waist region.

[0086] In the aforementioned garment, the stretch piece is positioned in a predetermined stretch piece configuration area, thus enabling the garment to reliably function as the stretch piece.

[0087] [Technical Solution 12]

[0088] According to the wearable article described in technical solution 11, wherein,

[0089] The telescopic plate configuration area is configured such that it is within 50% of the height of the waist region in the height direction.

[0090] In the aforementioned garment, the elastic tab is positioned within a predetermined range of the waist area. Therefore, the pair of locking parts can be divided into relatively easily damaged portions and relatively indestructible portions. Thus, when wearing the garment, the pair of locking parts are difficult to damage, making the garment easy to wear; furthermore, when discarding the garment, the pair of locking parts are easy to break, making the garment easy to discard.

[0091] [Technical Solution 13]

[0092] The wearable article according to technical solution 11 or 12, wherein,

[0093] The telescopic plate configuration area is configured to be arranged around the waistline.

[0094] In the aforementioned garment, the stretchable area is arranged to wrap around the waist, making it easier for the waist area to expand when worn and less likely to slip off.

[0095] [Technical Solution 14]

[0096] The garment according to any one of technical solutions 11 to 13, wherein,

[0097] The telescopic tabs are continuously arranged in the telescopic tab arrangement area.

[0098] In the aforementioned garment, the stretch panels are continuously arranged in the stretch panel arrangement area, thus enabling the stretch panels to reliably function throughout the entire stretch panel arrangement area.

[0099] [Technical Solution 15]

[0100] The garment according to any one of technical solutions 11 to 14, wherein,

[0101] The telescopic tab configuration area is configured in a manner that does not connect with the leg opening.

[0102] In the aforementioned garment, the area where the telescopic tabs are positioned is not in contact with the leg openings where strong forces can be easily applied when the garment is worn. Therefore, the pair of locking parts are less likely to be damaged when the garment is worn.

[0103] The following details the clothing items disclosed herein.

[0104] Figures 1-6 This is a diagram illustrating a disposable wearable article of one embodiment of the present disclosure (hereinafter referred to as "first embodiment"), specifically a diagram illustrating a disposable shorts-type diaper 1. Specifically, Figure 1 This is a 3D image of shorts-type diaper 1. Figure 2 This is an unfolded diagram of shorts-type diaper 1. Figure 3 This is the unfolded diagram of absorbent body 5. Figure 4 and Figure 5 These are enlarged views of the front part FP and the back part RP of the shorts-type diaper 1 in the unfolded diagram. Figure 6 It is equivalent to Figure 2 A cross-sectional view of the left locking part 9 of the outer body 3 on the VI-VI end face. Additionally, in Figure 6 From the perspective of understanding the constituent components of the left locking part 9 (locking part 7) of the outer body 3, the state of compression is not reflected.

[0105] The shorts-type diaper 1 of the first embodiment is divided into an outer body 3 and an absorbent body 5 disposed on the inner side (skin side) of the outer body 3.

[0106] like Figure 1 As shown, the shorts-type diaper 1, when worn, has a waist direction WD and a height direction HD orthogonal to the waist direction WD. Additionally, as... Figure 2 As shown, the shorts-type diaper 1 of the first embodiment has a length direction L, a width direction W, and a thickness direction that are orthogonal to each other in the unfolded state.

[0107] like Figure 2 As shown, the shorts-type diaper 1 is divided into a front portion FP and a back portion RP by a center line LC extending parallel to the width direction W along the length direction L. Furthermore, the shorts-type diaper 1 is divided along the length direction L into a waist region WR, which is a region containing a pair of locking parts 7 (left locking part 9 and right locking part 11), and a leg area CR. The waist region WR is further divided into a front waist region FWR located in the front portion FP and a back waist region RWR located in the back portion RP. Figure 2In the middle, the leg circumference area CR is positioned between the front waist area FWR and the back waist area RWR.

[0108] In addition, the waist area WR and the leg area CR are connected to the waist opening 13 and the leg opening 15, respectively.

[0109] The absorbent body 5 includes: a liquid-permeable sheet 101; a liquid-impermeable sheet 107; and a first absorbent core 103 and a second absorbent core 105 disposed between the liquid-permeable sheet 101 and the liquid-impermeable sheet 107.

[0110] Additionally, the absorbent body 5 includes: a pair of leak-proof walls 109 having an elastic member 111 for leak-proof walls; and an elastic member 113 for leg circumference, which imparts elasticity to the leg circumference area CR.

[0111] The outer body 3 has the following features in the front waist area FWR: a front outer piece 21; a front inner piece 23; a front elastic piece 33 and a plurality of front linear elastic members 37, which are disposed between the front outer piece 21 and the front inner piece 23.

[0112] The front outer sheet 21, the front inner sheet 23, and the front folded-back sheet 25 (described later) are each made of long-fiber nonwoven fabric containing 100% by mass of thermoplastic fibers. Additionally, the front elastic sheet 33 is formed by molding an elastic resin material, primarily composed of thermoplastic elastic resin, into a sheet shape. The plurality of front linear elastic members 37 are elastic bands.

[0113] The outer body 3 has a front fold-back piece 25 in the front waist area FWR. The front fold-back piece 25 is formed by folding the front outer piece 21 inward at the end edge (not shown) of the waist opening 13. The front fold-back piece 25 is positioned further inward (on the skin side) than the front inner piece 23.

[0114] In addition, the front fold-back piece 25 covers the front end of the absorbent body 5 (not marked in the accompanying drawings) and is positioned inside the front end of the absorbent body 5, thereby preventing the end of the absorbent body 5 from directly contacting the wearer.

[0115] A front elastic plate 33 is disposed in the front telescopic plate disposal area 35 of the front waist region FWR. In addition, a plurality of front linear elastic members 37 are disposed in the front linear elastic member disposal area 39 of the front waist region FWR.

[0116] The front telescopic plate arrangement area 35 occupies approximately 25% of the height h in the height direction HD of the front waist region FWR and is located near the waist opening 13. In addition, the front linear elastic member arrangement area 39 occupies approximately 75% of the height h in the height direction HD of the front waist region FWR, is connected to the front telescopic plate arrangement area 35, and is located near the leg opening 15.

[0117] In the front telescopic sheet configuration area 35, the front elastic sheet 33, together with the front outer sheet 21, the front inner sheet 23, and the front fold-back sheet 25, are ultrasonically bonded to form a front telescopic sheet 19 as a laminated sheet. The front telescopic sheet 19 has a plurality of front joint portions 45 formed by ultrasonically bonding and welding the front outer sheet 21, the front elastic sheet 33, the front inner sheet 23, and the front fold-back sheet 25. The plurality of front joint portions 45 are arranged in an interlaced pattern in the front telescopic sheet configuration area 35.

[0118] In the front telescopic tab configuration area 35, no adhesive (e.g., hot melt adhesive) is used for bonding the front outer tab 21, the front elastic tab 33, the front inner tab 23, and the front fold-back tab 25.

[0119] Additionally, in the front linear elastic member configuration area 39, a plurality of front linear elastic members 37 are bonded to the front outer sheet 21 and the front inner sheet 23 using a hot melt adhesive applied to the plurality of front linear elastic members 37. Furthermore, the front inner sheet 23 and the front folded-back sheet 25 are bonded using a hot melt adhesive.

[0120] The outer body 3 has the following in the rear waist area RWR: rear outer sheet 27; rear inner sheet 29; and rear elastic sheet 51, a plurality of rear linear elastic members 55 and a plurality of rear leg circumference linear elastic members 58, which are disposed between the rear outer sheet 27 and the rear inner sheet 29.

[0121] The rear outer sheet 27, the rear inner sheet 29, and the rear fold-back sheet 31 (described later) are each made of long-fiber nonwoven fabric containing 100% by mass of thermoplastic elastic fibers. Additionally, the rear elastic sheet 51 is formed by molding an elastic resin material with thermoplastic elastic resin as its main component into a sheet shape. The plurality of rear linear elastic members 55 and the plurality of rear leg-circle linear elastic members 58 are elastic bands.

[0122] The outer body 3 has a rear folded-back piece 31 in the lower back area RWR, which is formed by folding the rear outer piece 27 inward at the end edge (not shown) of the waist opening 13. The rear folded-back piece 31 is positioned further inward (on the skin side) than the rear inner piece 29.

[0123] In addition, the rear fold-back piece 31 covers the rear end of the absorbent body 5 (not indicated in the drawings) and is positioned inside the rear end of the absorbent body 5, thereby preventing the end of the absorbent body 5 from directly contacting the wearer.

[0124] A rear elastic sheet 51 is disposed in the rear telescopic sheet disposal area 53 of the rear waist region RWR. In addition, a plurality of rear linear elastic members 55 are disposed in the rear linear elastic member disposal area 57 of the rear waist region RWR.

[0125] The rear telescopic plate arrangement area 53 occupies approximately 25% of the height h in the height direction HD of the rear waist region RWR and is located near the waist opening 13. In addition, the rear linear elastic member arrangement area 57 occupies approximately 75% of the height h in the height direction HD of the rear waist region RWR, is connected to the rear telescopic plate arrangement area 53, and is located near the leg opening 15.

[0126] In the rear telescopic sheet configuration area 53, the rear elastic sheet 51, together with the rear outer sheet 27, the rear inner sheet 29, and the rear fold-back sheet 31, are ultrasonically bonded to form a rear telescopic sheet 20 as a laminated sheet. The rear telescopic sheet 20 has a plurality of rear joint portions 63 formed by ultrasonically bonding and welding the rear outer sheet 27, the rear elastic sheet 51, the rear inner sheet 29, and the rear fold-back sheet 31. The plurality of rear joint portions 63 are arranged in an interlaced pattern in the rear telescopic sheet configuration area 53.

[0127] In the rear telescopic tab configuration area 53, no adhesive (e.g., hot melt adhesive) is used for bonding the rear outer tab 27, the rear elastic tab 51, the rear inner tab 29, and the rear fold-back tab 31.

[0128] Additionally, in the rear linear elastic member configuration area 57, a plurality of rear linear elastic members 55 are bonded to the rear outer sheet 27 and the rear inner sheet 29 using a hot-melt adhesive applied to the plurality of rear linear elastic members 55. Furthermore, the rear inner sheet 29 is bonded to the rear folded-back sheet 31 using a hot-melt adhesive.

[0129] The front waist area FWR is divided into: a high sheet count area 41, which consists of an outer sheet 21, an inner sheet 23, and a folded sheet 25; and a low sheet count area 43, which consists of an outer sheet 21 and an inner sheet 23, but does not include the folded sheet 25.

[0130] In addition, the front telescopic sheet configuration area 35, which is configured with the front elastic sheet 33, is configured within the front high sheet count area 41.

[0131] The back waist area RWR is divided into: a high sheet count area 59, which consists of a rear outer sheet 27, a rear inner sheet 29 and a rear folded sheet 31; and a low sheet count area 61, which consists of a rear outer sheet 27 and a rear inner sheet 29, but does not include the rear folded sheet 31.

[0132] In addition, the rear telescopic sheet configuration area 53 of the rear elastic sheet 51 is configured within the rear high sheet count area 59.

[0133] A pair of locking parts 7 (left locking part 9 and right locking part 11) are formed in the following manner: the shorts-type diaper 1 in its unfolded state is folded with the absorbent body 5 inside the fold line LC of the length direction centerline. On this basis, the front high-sheet area 41 of the front waist region FWR is aligned with the rear high-sheet area 59 of the back waist region RWR, and the front low-sheet area 43 of the front waist region FWR is aligned with the rear low-sheet area 61 of the back waist region RWR. The two ends (not labeled) in the width direction W of the front waist region FWR and the back waist region RWR are compressed.

[0134] In the shorts-type diaper 1 of the first embodiment, the front stretch piece 19 and the rear stretch piece 20 each have an elasticity retention rate of 90% or more in a predetermined tensile test. Furthermore, in the shorts-type diaper 1, in the waist area WR, a stretch piece 17 composed of the front stretch piece 19 and the rear stretch piece 20 clamps a pair of locking portions 7 in the middle, arranged in a manner that wraps around the waist direction WD. Therefore, in the shorts-type diaper 1, the waist area WR easily expands when worn and is less likely to slip off while worn.

[0135] Furthermore, the stretch piece 17 is configured to be located in an area less than 25% of the height h in the height direction HD of the waist region WR. Therefore, when wearing the shorts-type diaper 1, the pair of locking parts 7 are not easily damaged, making it easy to wear the shorts-type diaper 1; and when discarding, the pair of locking parts 7 are easily broken, making it easy to discard the shorts-type diaper 1.

[0136] Furthermore, the stretch piece 17 is configured to connect with the waist opening 13. Therefore, in the shorts-type diaper 1, the portion of the waist area WR near the waist opening 13 expands significantly during wear, making it easy to put on. Additionally, the elasticity of the portion of the waist area WR near the waist opening 13 does not easily decrease over time, thus preventing the waist area WR from slipping down when worn in the shorts-type diaper 1.

[0137] Furthermore, the telescopic piece 17 is arranged in a manner that does not connect with the leg opening 15. As a result, the pair of locking parts 7 are not easily damaged when the garment is worn.

[0138] As for the disposable clothing items disclosed herein (hereinafter, sometimes referred to as "the clothing items disclosed herein"), there are no particular limitations as long as they have an opening area, for example, disposable diapers, disposable shorts, disposable underwear, etc.

[0139] Examples of such opening areas include a waist area with a waist opening and a leg area with a leg opening.

[0140] The wearable article disclosed herein has a stretchable tab in the aforementioned opening area. The stretchable tab is a laminate comprising an elastic sheet obtained by molding an elastic resin material, primarily composed of thermoplastic elastic resin, into a sheet shape.

[0141] As for the aforementioned thermoplastic elastic resin, a thermoplastic resin that exhibits rubber-like elasticity at room temperature is preferred, for example, the thermoplastic elastomer described in JIS K 6418:2007. Preferably, the temperature range for elastic deformation of the aforementioned thermoplastic elastic resin is about 100°C or below.

[0142] Examples of the aforementioned thermoplastic elastomers include olefin-based elastomers (e.g., Dow Chemical's VERSIFY (trademark)), propylene-based elastomers (e.g., ExxonMobil's Vistamaxx (trademark)), and styrene-based elastomers (e.g., Zeon Corporation's Quintac (trademark)).

[0143] The aforementioned elastic sheet can be manufactured using the aforementioned thermoplastic elastic resin, for example, according to the method described in International Publication No. 2019 / 150801.

[0144] The aforementioned stretch sheet is a laminate of the aforementioned elastic sheet and other sheets. Examples of the aforementioned other sheets include non-woven fabrics, woven fabrics, and woven textiles.

[0145] For example, the aforementioned stretch sheet may include a first nonwoven fabric, a second nonwoven fabric, and an elastic sheet disposed between the first nonwoven fabric and the second nonwoven fabric.

[0146] Examples of nonwoven fabrics mentioned above include hot-air nonwoven fabric, spunbond nonwoven fabric, dot-bonded nonwoven fabric, spunlace nonwoven fabric, needle-punched nonwoven fabric, meltblown nonwoven fabric, and SMS nonwoven fabric (spunbond-meltblown-spunbond nonwoven fabric).

[0147] The aforementioned nonwoven fabric contains heat-fused fibers. Furthermore, the nonwoven fabric preferably contains 50% or more by mass, more preferably 70% or more by mass, further preferably 80% or more by mass, and even more preferably 90% or more by mass of heat-fused fibers. Additionally, the aforementioned nonwoven fabric can contain 100% by mass of the aforementioned heat-fused fibers. Therefore, when wearing the aforementioned garment, the pair of locking parts are not easily damaged, making it easy to wear; furthermore, the pair of locking parts are easily broken, making it easy to discard the aforementioned garment.

[0148] In the aforementioned telescopic sheet, the elastic sheet can be joined with other sheets, for example, using welded portions (e.g., embossed, ultrasonically based welded portions), adhesive portions (e.g., adhesive portions based on hot melt adhesives), etc. The joining portions are preferably welded portions, and particularly preferably ultrasonically based welded portions. This is because welded portions, especially ultrasonically based welded portions, are less likely to impede the telescopic properties of the sheet by reducing their size.

[0149] In the tensile test, the aforementioned stretch piece exhibits an elasticity retention rate of 80% or more, preferably 85% or more, and more preferably 90% or more. Furthermore, the aforementioned stretch piece preferably has an elasticity retention rate of 100% or less, more preferably 98% or less, and even more preferably 96% or less. Therefore, in the aforementioned garment, the opening area easily expands during wear and is less prone to misalignment when worn.

[0150] The tensile test described above is performed as follows.

[0151] (1) As a tensile testing machine, prepare an Instron universal testing machine (3400 series).

[0152] (2) Under the condition of 25℃±2℃, let the expansion joint stand for 24 hours.

[0153] (3) Cut the telescopic piece into a size of 160mm×40mm to make a sample. Place the sample on the fixture with a chuck distance of 80mm.

[0154] (4) Perform the first cycle, which includes a first forward path at a speed of 300 mm / min to elongate the sample to an elongation of 80% (+64 mm, chuck distance 144 mm) and a first return path at a speed of 300 mm / min to return the sample to an elongation of 0% (±0 mm, chuck distance 80 mm).

[0155] (5) Following the first cycle, the second cycle is performed, which includes a second forward path at a speed of 300 mm / min to elongate the sample to an elongation of 80% (+64 mm, chuck distance 144 mm) and a second return path at a speed of 300 mm / min to return the sample to an elongation of 0% (±0 mm, chuck distance 80 mm).

[0156] (6) The elastic retention rate is calculated as the ratio (percentage) of the tensile force when the elongation is 50% on the second return path of the second cycle (chuck distance: 120 mm) to the tensile force when the elongation is 50% on the first forward path of the first cycle (chuck distance: 120 mm).

[0157] In the case where the waist area of ​​the clothing disclosed herein includes a waist opening that serves as the opening area for an elastic band, the elastic band is preferably configured to connect with the waist opening. Therefore, the clothing can easily expand the waist opening to a larger extent when worn, making it easy to put on. Furthermore, the elasticity of the waist opening does not easily decrease over time, thus preventing the clothing from slipping off while worn.

[0158] Furthermore, in this disclosure, the connection between the aforementioned telescopic piece and the waist opening includes a distance from the telescopic piece to the end of the waist opening that is preferably less than 5%, more preferably less than 3%, and even more preferably less than 1% of the height of the waist region (height in the height direction).

[0159] In the case where the clothing article of this disclosure includes a waist region with a waist opening as the aforementioned opening region, and when the clothing article also includes an absorbent core, the clothing article preferably has a stretch tab in a manner that does not overlap with the absorbent core in the thickness direction when it is unfolded. Therefore, the stretch tab's expansion and contraction are not easily hindered by the absorbent core, and in the aforementioned clothing article, the waist region is easy to expand when worn and does not easily slip off when worn.

[0160] When the clothing article of this disclosure includes a waist region with a waist opening as the aforementioned opening region, and the clothing article also includes an absorbent body, the clothing article preferably has a stretch piece in a manner that does not overlap with the absorbent body in the thickness direction when it is unfolded. Therefore, the stretching and contraction of the stretch piece is not easily hindered by the absorbent body, and in the aforementioned clothing article, the waist region is easy to expand when worn and does not easily slip off when worn.

[0161] In addition, the absorbent body includes at least a liquid-permeable sheet and an absorbent core, and may also include a pair of leak-proof walls, a liquid-impermeable sheet, an outer casing sheet, etc.

[0162] In the case of a shorts-type garment having a waistline and a height direction orthogonal to the waistline, and having a front part, a back part, and a pair of leg openings, the garment has a pair of locking parts in the waistline area. These locking parts are formed by fusing a nonwoven fabric containing heat-welding fibers constituting the front part with the same nonwoven fabric constituting the back part, and extend from the waist opening to the pair of leg openings. Preferably, the stretch piece is a laminate of the elastic piece and the nonwoven fabric, and the stretch piece is disposed on one or both of the pair of locking parts. Therefore, the garment is easy to wear because the locking parts are not easily damaged, and easy to discard because the locking parts are easily broken.

[0163] The aforementioned telescopic piece is preferably disposed on both of the aforementioned pair of locking parts. This is because the aforementioned effect can be reliably achieved in both of the pair of locking parts.

[0164] In addition, the pair of locking parts are usually located on the right and left sides when worn, but are not limited to this.

[0165] Preferably, when the pair of locking portions is divided into a high-sheet-count region with a relatively large number of nonwoven fabrics constituting the locking portions and a low-sheet-count region with a relatively small number of nonwoven fabrics constituting the locking portions, the stretch piece is disposed in the high-sheet-count region. Examples of such high-sheet-count regions include areas having a folded-back piece formed by folding the outer sheet inward, and a protective piece disposed on the inner side (skin side) of the end of the absorbent body in the longitudinal direction to prevent the end of the absorbent body from directly contacting the wearer.

[0166] The aforementioned telescopic piece can be disposed in a predetermined telescopic piece configuration area extending along the waist direction and the height direction in the aforementioned waist region. Furthermore, in the aforementioned predetermined telescopic piece configuration area, the aforementioned telescopic piece (elastic piece) can be disposed continuously (monolithically) or intermittently in the telescopic piece configuration area.

[0167] For example, in the predetermined telescopic piece configuration area, the telescopic pieces can be configured continuously or intermittently along the aforementioned height direction. Additionally, in the predetermined telescopic piece configuration area, the telescopic pieces can be configured continuously or intermittently along the aforementioned waistline direction.

[0168] For example, by continuously arranging the telescopic plates in the telescopic plate arrangement area (both along the height direction and the waist direction), the effect of the telescopic plates can be achieved throughout the entire telescopic plate arrangement area.

[0169] In addition, by intermittently (intermittently along at least one of the height direction and the waist direction) distributing the stretch sheet in the stretch sheet distribution area, the effect of the stretch sheet can be achieved, and the breathability (breathability in the thickness direction) of the stretch sheet in the stretch sheet distribution area can be ensured.

[0170] The aforementioned telescopic tab configuration area can also be configured within 100% of the height of the waist region in the aforementioned height direction, but it is preferable to configure it within 75% or less, more preferably within 50% or less, and even more preferably within 25% or less. Furthermore, the aforementioned telescopic tab configuration area is preferably configured within 5% or more, more preferably within 10% or more, and even more preferably within 12% or more in the aforementioned height direction. Therefore, when wearing the aforementioned garment, the pair of locking parts are not easily damaged, making the garment easy to wear; and when discarding, the pair of locking parts are easily broken, making the garment easy to discard.

[0171] The aforementioned stretchable panel configuration area can also be arranged in a manner that wraps around the waistline. Therefore, in the aforementioned garment, the waistline area expands more easily when worn, and is less likely to slip off while worn.

[0172] The aforementioned telescopic tab configuration area can be arranged in a manner that does not connect with the leg opening. Therefore, when the garment is worn, the pair of locking parts are less likely to be damaged.

[0173] The aforementioned stretchable sheet (elastic sheet) has a predetermined height (length) in the aforementioned height direction, preferably 5 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. Therefore, the garment can reliably function as the stretchable sheet.

[0174] [Example]

[0175] The following examples illustrate this disclosure, but this disclosure is not limited to these examples.

[0176] [Manufacturing Example 1]

[0177] As a thermoplastic elastic resin, it uses styrene-based elastomers to manufacture elastic sheets No. 1.

[0178] With the elastic sheet No.1 stretched to 100% (twice the original length), spunbond nonwoven fabric (weight per unit area: 15g / m²) was used. 2 ) and SMS nonwoven fabric (weight per unit area: 13g / m²) 2 The material is clamped and ultrasonically bonded to create a structure with multiple joints (joint area: 0.06 mm). 2 / each, density: 82,000 / m 2 ) of the No.1 telescopic sheet.

[0179] [Manufacturing Example 2]

[0180] Gear stretching was applied to a stretch nonwoven fabric manufactured by Mitsui Chemicals. After gear stretching, the stretch nonwoven fabric was stretched to 100% (twice the original length). Then, spunbond nonwoven fabric (weight per unit area: 15 g / m²) was used. 2 ) and SMS nonwoven fabric (weight per unit area: 13g / m²) 2 The material is clamped and ultrasonically bonded to create a structure with multiple joints (joint area: 0.12 mm). 2 / each, density: 150,000 / m² 2 ) of the No.1 telescopic sheet.

[0181] [Manufacturing Example 3]

[0182] Elastic bands of 620 dtex are arranged at 5 mm intervals. With the elastic bands stretched to 100% (twice their original length), a hot-melt adhesive is applied to the elastic bands using a V-shaped slit. This is then bonded to a spunbond nonwoven fabric (weight per unit area: 15 g / m²). 2 ) and SMS nonwoven fabric (weight per unit area: 13g / m²) 2 Clamp the elastic cord and prepare nonwoven fabric No.1 containing the elastic cord.

[0183] [Manufacturing Example 4]

[0184] A hot-melt adhesive was applied to the entire surface of a 3M stretch film in an Ω pattern. With the stretch film stretched to 100% (twice its original length), spunbond nonwoven fabric (weight per unit area: 15g / m²) was then used. 2 ) and SMS nonwoven fabric (weight per unit area: 13g / m²) 2 Clamped together, to manufacture nonwoven fabric containing stretch membrane No.1.

[0185] [Example 1, Comparative Examples 1-3]

[0186] Tensile tests were conducted on stretch sheet No. 1, stretch nonwoven fabric No. 1, nonwoven fabric No. 1 containing elastic threads, and nonwoven fabric No. 1 containing stretch film. Figure 7 (Example 1) Figure 8 (Comparative Example 1) Figure 9 (Comparative Example 2) and Figure 10 (Comparative Example 3) shows a graph of the tensile test. In addition, the elasticity retention rate is shown in Table 1.

[0187] In addition, Figures 7-10In the various diagrams, both the first and second loops have data on the forward path on the top and data on the return path on the bottom.

[0188] [Table 1]

[0189] Table 1

[0190]

Claims

1. A disposable garment having an opening area, characterized in that, The garment has a stretchable tab in the opening area. The stretch sheet is formed from a stack of sheets including an elastic sheet. The elastic sheet is obtained by molding an elastic resin material with thermoplastic elastic resin as the main component into a sheet shape. The thermoplastic elastic resin is selected from the group consisting of olefin-based elastomers, propylene-based elastomers, and styrene-based elastomers. The stretch sheet has an elasticity retention rate of more than 80%. The elastic retention rate was determined by the following tensile test: (1) Perform the first cycle, which includes a first forward path that extends the telescopic piece by 80% at a speed of 300 mm / min and a first return path that returns the telescopic piece to 0% at the same speed. (2) Following the first cycle, the second cycle is performed, which includes a second forward path that extends the telescopic piece by 80% again at a speed of 300 mm / min and a second return path that returns the telescopic piece to 0% at the same speed. (3) The elastic retention rate is calculated as the ratio of the tensile force when the elongation is 50% on the second return path to the tensile force when the elongation is 50% on the first forward path.

2. The wearable article according to claim 1, wherein, The telescopic piece has an elasticity retention rate of over 90%.

3. The garment article according to claim 1 or 2, wherein, The opening area is a waist area with a waist opening.

4. The wearable article according to claim 3, wherein, The telescopic piece is configured to connect with the waist opening.

5. The wearable article according to claim 3, wherein, The wearable item also includes an absorbent core. The garment has the stretch tab in such a way that it does not overlap with the absorbent core in the thickness direction when it is in its unfolded state.

6. The wearable article according to claim 5, wherein, The garment also includes an absorbent body comprising at least a liquid-permeable sheet and the absorbent core. The garment has the stretch tab in such a way that it does not overlap with the absorbent body in the thickness direction when it is unfolded.

7. The wearable article according to claim 3, wherein, The garment is a shorts-style garment, having a waistline and a height direction perpendicular to the waistline, and comprising a front portion, a back portion, and a pair of leg openings. The garment has a pair of locking parts in the waist area, which are formed by fusing a nonwoven fabric containing heat-fused fibers constituting the front part and a nonwoven fabric constituting the back part, and extend from the waist opening to the pair of leg openings. The stretch piece is a laminate of the elastic piece and the nonwoven fabric, and the stretch piece is disposed on one or both of the pair of locking portions.

8. The wearable article according to claim 7, wherein, The nonwoven fabric contains 50% to 100% by mass of the heat-melting fibers.

9. The garment article according to claim 7 or 8, wherein, The nonwoven fabric is selected from the group consisting of hot-air nonwoven fabric, spunbond nonwoven fabric, dot-bonded nonwoven fabric, needle-punched nonwoven fabric, meltblown nonwoven fabric and SMS nonwoven fabric.

10. The garment article according to claim 7 or 8, wherein, The stretch tab is disposed in a high-sheet area of ​​the nonwoven fabric constituting the pair of locking parts, where the number of sheets is relatively large.

11. The garment article according to claim 7 or 8, wherein, The telescopic piece is disposed in a predetermined telescopic piece configuration area extending along the waist direction and the height direction in the waist region.

12. The wearable article according to claim 11, wherein, The telescopic plate configuration area is configured such that it is within 50% of the height of the waist region in the height direction.

13. The wearable article according to claim 11, wherein, The telescopic plate configuration area is configured to be arranged around the waistline.

14. The wearable article according to claim 11, wherein, The telescopic tabs are continuously arranged in the telescopic tab arrangement area.

15. The wearable article according to claim 11, wherein, The telescopic tab configuration area is configured in a manner that does not connect with the leg opening.

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