Disposable wearing article

Abstract

The purpose of the present invention is to improve the fitness of a folded-back-type standing pleat. The problem is solved by: a front lodging portion 67F and a rear lodging portion 67B having a first portion 66a extending from a starting end 61 toward the center side in the width direction WD and a second portion 66b extending from the tail end toward the outside in the width direction WD; the raised portion 68 has a third portion 66c extending to the first portion 66a and a fourth portion 66d extending to the second portion 66b; there is no pleated elastic member 63 at a position closer to the starting end 61 than the second pleated elastic member 63b along the boundary between the third portion 66c and the fourth portion 66d. A pleated waterproof sheet 64 which covers almost the entire third portion 66c and is made of a waterproof resin film is fixed to the raised portion 68 to form a high-rigidity region; the fourth portion (66d) does not have the pleated waterproof sheet (64), the number of layers of the fourth portion (66d) is smaller than that of the third portion (66c), and the fourth portion (66d) is unlikely to bend between the second pleated elastic member (63b) and the starting end (61).

Description

TECHNICAL FIELD

[0001] The present application relates to a disposable wearing article having standing gathers on both side portions. BACKGROUND

[0002] In general, in various disposable wearing articles such as a diaper, a sanitary napkin, and the like, in order to prevent side leakage of excrements, standing gathers rising from a starting end extending in a front-rear direction are provided on both side portions in a width direction of a surface (for example, refer to Patent Documents 1 and 2).

[0003] Although there are various structures of standing gathers, most of the standing gathers have the following basic structure. That is, the standing gather has a main body portion extending from the starting end to a central side in the width direction, a front lying portion formed by fixing a front end portion of the main body portion in a lying state and a rear lying portion formed by fixing a rear end portion of the main body portion in a lying state, a non-fixed standing portion between the front lying portion and the rear lying portion of the main body portion, and a plurality of front-rear direction gather elastic members installed at intervals in the width direction in the standing portion.

[0004] The standing gather of the disposable wearing article is preferably in contact with the body surface at a shallower angle and with a larger area, and is preferably raised at a narrower surface occupation area (an area of the main body portion in the surface of the disposable wearing article in the unfolded state). Also, according to such a viewpoint, it is preferable that the front lying portion and the rear lying portion have a first portion extending from the starting end to the central side in the width direction and a second portion extending from a terminal end of the first portion to an outer side in the width direction, and the standing portion has a third portion continuing from the first portion of the front lying portion to the first portion of the rear lying portion and a fourth portion continuing from the first portion of the front lying portion to the first portion of the rear lying portion (hereinafter also referred to as a folded-back type).

[0005] However, in the standing gather of the folded-back type, although the boundary of the first portion and the second portion is fixed at the lying portion, the third portion and the fourth portion of the standing portion following them are not fixed, and depending on the wearing condition, the folded-back position can not only be the boundary of the third portion and the fourth portion, but also can be bent at multiple places at intervals, resulting in a decrease in the fit of the fourth portion.

[0006] PRIOR ART DOCUMENTS

[0007] PATENT DOCUMENTS

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 2021-69864

[0009] Patent Document 2: Japanese Patent No. 7252084 SUMMARY

[0010] The technical problem that the invention aims to solve

[0011] Therefore, the main objective of this invention is to improve the fit of the folded-back standing pleats.

[0012] Technical means for solving problems

[0013] The above-mentioned problem is solved by the absorbent material described below.

[0014] <Option 1>

[0015] A disposable garment comprising raised pleats respectively disposed on both sides of its surface in the width direction, extending from an initial end in the front-to-back direction. The aforementioned upright pleat includes: a main body extending from the aforementioned starting end toward the center side in the width direction; a front folded portion formed by fixing the front end of the aforementioned main body to a folded state and a rear folded portion formed by fixing the rear end of the aforementioned main body to a folded state; a non-fixed upright portion located between the aforementioned front folded portion and the aforementioned rear folded portion of the aforementioned main body; and a plurality of pleat elastic members in the front-to-back direction are installed at intervals along the width direction in the aforementioned upright portion. The aforementioned forward-falling portion and the aforementioned backward-falling portion each have a first portion extending from the aforementioned beginning end toward the center side in the width direction and a second portion extending from the end of the first portion toward the outer side in the width direction. Simultaneously, the aforementioned upright portion has a third portion extending from the aforementioned first portion of the forward-falling portion to the aforementioned first portion of the backward-falling portion and a fourth portion extending from the aforementioned second portion of the forward-falling portion to the aforementioned second portion of the backward-falling portion. Its characteristic is that... The aforementioned pleated elastic component includes a first pleated elastic component installed at the end portion opposite to the aforementioned fourth portion in the aforementioned third portion, and a second pleated elastic component installed along the boundary between the aforementioned third portion and the aforementioned fourth portion; The aforementioned pleated elastic member is not present at a position closer to the aforementioned starting end side than the aforementioned second pleated elastic member; The pleated waterproof sheet made of waterproof resin film covering the aforementioned third part is fixed to the aforementioned upright part in an integral manner that covers at least the entire front-back direction of the aforementioned upright part; The aforementioned pleated waterproof sheet extends at least to the aforementioned beginning end from a position within 5 mm of the aforementioned second pleated elastic member; The fixing area of ​​the aforementioned pleated waterproof sheet and the aforementioned upright portion extends at least 5 mm from the end of the aforementioned pleated waterproof sheet, closer to the aforementioned starting end, to the aforementioned starting end; and The aforementioned raised pleats have pleated nonwoven fabric covering both the aforementioned third and fourth parts, while the aforementioned fourth part does not have a pleated waterproof sheet, and its sheet layer count is less than that of the aforementioned third part.

[0016] (Effects)

[0017] In the stand-up pleats of this disposable garment, a first pleat elastic member is installed at the end of the fourth part opposite to the third part, and a second pleat elastic member is installed along the boundary between the third and fourth parts. There is no pleat elastic member at a position closer to the beginning than the second pleat elastic member. As a result, the fourth part remains raised at a low angle and contacts the body surface, while the third part stands up higher. Here, the third part, in general, becomes a high-rigidity area with a particularly rigid waterproof resin film (pleated waterproof sheet) adhered to it. Because its end is raised by the second pleat elastic member, it is difficult for the folded-back position of the stand-up portion to occur outside the position along the second pleat elastic member, especially difficult for bending to occur between the second pleat elastic member and the beginning. In other words, the third part, ensuring a high stand-up height, has high waterproofness due to the pleated waterproof sheet, and also high shape retention. On the other hand, the fourth part does not have a highly rigid waterproof resin membrane (pleated waterproof sheet), and its number of layers is less than that of the third part, so it comes into contact with the skin in a soft (low rigidity) manner.

[0018] <Option 2>

[0019] The disposable wearable article according to Scheme 1 has: an absorbent body; and

[0020] A liquid-permeable top plate is disposed on the front side of the aforementioned absorbent, wherein... The aforementioned top plate has extended portions that extend to both sides in the width direction of the aforementioned absorber. The aforementioned extended portion of the top sheet has a folded-back portion that folds back towards the front side from the aforementioned starting end. The aforementioned top sheet folded-back portion extends from the aforementioned starting end to a position within ±5 mm in the width direction, based on the end of the aforementioned second pleated elastic member side of the aforementioned pleated waterproof sheet, and is fixed to the aforementioned pleated waterproof sheet. The aforementioned top sheet fold-back portion and the aforementioned pleated waterproof sheet fixing area extend from the aforementioned top sheet fold-back portion to a position within 5 mm of the aforementioned starting end side, further than the aforementioned second pleated elastic member side, to the aforementioned starting end.

[0021] (Effects)

[0022] As in this design, if the top piece extends laterally and folds back along the main part of the raised pleats and is fixed relative to the raised part, the restoring force of the folding back relative to the top piece will act in a way that raises the third part from the beginning. At the same time, the rigidity of the third part will be further enhanced, making it more difficult for it to bend between the elastic member of the second pleat and the beginning.

[0023] <Option 3>

[0024] According to Scheme 2, the disposable wearable article has a bottom waterproof sheet made of a waterproof resin film disposed on the back side of the aforementioned absorbent body. The aforementioned waterproof sheet has extended portions extending to both sides in the width direction of the aforementioned absorbent body. The aforementioned extended portion of the bottom waterproof sheet has a folded-back portion that folds back towards the front side from the aforementioned starting end, and The folded-back portion of the aforementioned bottom waterproof sheet constitutes the aforementioned pleated waterproof sheet.

[0025] (Effects)

[0026] As in this solution, if the bottom waterproof sheet made of waterproof resin film extends laterally and is folded back along the main part of the raised pleats and fixed relative to the raised part, the restoring force of the folding back relative to the bottom waterproof sheet will act in a way that raises the third part from the beginning, which is therefore preferred.

[0027] <Option 4>

[0028] According to Scheme 3, the disposable wearable item has an outer nonwoven fabric disposed on the back side of the aforementioned absorbent body. The aforementioned outer nonwoven fabric has outer extension portions extending to both sides in the width direction of the aforementioned absorbent body. The aforementioned external extension has an external fold-back portion that folds back towards the front side from the aforementioned starting end. The aforementioned outer fold-back portion extends from the aforementioned starting point to a position within ±5 mm in the width direction, based on the end of the aforementioned second pleated elastic member side of the aforementioned pleated waterproof sheet, and is fixed to the aforementioned pleated waterproof sheet. The aforementioned outer fold-back portion and the aforementioned pleated waterproof sheet fixing area extend from the aforementioned outer fold-back portion within 5 mm of the aforementioned starting end side beyond the aforementioned second pleated elastic member side to the aforementioned starting end.

[0029] (Effects)

[0030] As in this solution, if the outer nonwoven fabric extends laterally and folds back along the main part of the raised pleats and is fixed relative to the raised part, the restoring force of the folding back relative to the outer nonwoven fabric will act in a way that raises the third part from the beginning. At the same time, the rigidity of the third part will be further enhanced, and it will be more difficult for it to bend between the elastic part of the second pleat and the beginning.

[0031] <Option 5>

[0032] According to any one of Schemes 1 to 4, the stiffness of the aforementioned third part, measured by the 45° cantilever method, is 80 mm to 150 mm.

[0033] (Effects)

[0034] The rigidity of the third part is not limited, but in order to obtain the aforementioned advantages, it is preferred to be within the range of this solution.

[0035] <Option 6>

[0036] According to any one of Schemes 2 to 5, in the disposable wearable article, the aforementioned absorbent body has a narrowed region in the width direction at its middle portion in the front-to-back direction. The distance between the side edge of the narrowest part in the aforementioned narrowing region and the aforementioned starting end in the width direction is 5 mm to 20 mm, and The distance between the aforementioned starting end and the aforementioned second pleated elastic member in the width direction is 10 mm to 25 mm.

[0037] (Effects)

[0038] To improve the fit of the crotch area, a narrower region, narrower than its front and rear sides, is often provided in the middle of the absorbent body in the front-to-back direction. In this case, the area between the side edge of the narrower region and the beginning of the raised pleats will increase the height of the raised pleats in the crotch area. However, with this enlarged portion, the force applied to the third part becomes more complex, and undesirable bending can easily occur between the elastic member of the second pleat and the beginning. Therefore, using the aforementioned pleated waterproof sheet to enhance the rigidity of the third part becomes particularly meaningful in this case.

[0039] Invention Effects

[0040] According to the present invention, advantages such as improved fit of the folded-back type standing pleats are provided. Attached Figure Description

[0041] Figure 1 This is a top view showing the inner surface of a pad-type disposable diaper.

[0042] Figure 2 yes Figure 1 Sectional view 1-1.

[0043] Figure 3 yes Figure 1 Sectional view 2-2.

[0044] Figure 4 When wearing a pad-type disposable diaper Figure 1 Sectional view 1-1.

[0045] Figure 5 This is another option for pad-type disposable diapers. Figure 1 Sectional view 1-1.

[0046] Figure 6 It is an enlarged cross-sectional view of the main part that raises the pleats.

[0047] Figure 7 This is another option for pad-type disposable diapers. Figure 1 Sectional view 1-1. Detailed Implementation

[0048] Hereinafter, with reference to the accompanying drawings, an example of a pad-type disposable diaper will be described in detail. In addition to the fixing or joining portions described below, adjacent components in the thickness direction are also fixed or joined as required, similar to known diapers. The dotted pattern represents an adhesive such as a hot melt adhesive used as the fixing or joining method. The hot melt adhesive can be applied using known methods such as slit coating, continuous linear or dotted line droplet coating, spiral, Z-shaped, corrugated spray coating, or pattern coating (transfer of the hot melt adhesive by letterpress printing). In the fixing portion of the elastic component, instead of this method or in combination with it, the hot melt adhesive can be applied to the outer peripheral surface of the elastic component to fix the elastic component to the adjacent component. Examples of hot melt adhesives include EVA-type, adhesive rubber-type (elastomer-type), polyolefin-type, and polyester / polyamide-type, but they can be used without particular limitation. As the fixing or joining means to join the components, methods based on material welding, such as heat sealing or ultrasonic sealing, can also be used. In areas where liquid permeability in the thickness direction is required, adjacent components in the thickness direction are fixed or joined using an intermittent pattern. For example, when such intermittent fixing or joining is achieved using a hot melt adhesive, intermittent patterns such as spiral, Z-shaped, or corrugated patterns can be appropriately applied. When the coating area exceeds the coating width of one nozzle, intermittent patterns such as spiral, Z-shaped, or corrugated patterns can be applied intermittently or continuously in the width direction (WD). As a joining method to connect the components, methods based on material fusion, such as heat sealing or ultrasonic sealing, can also be used.

[0049] Furthermore, the nonwoven fabrics described below can be any known nonwoven fabrics, depending on the application and purpose. As constituent fibers of the nonwoven fabric, in addition to synthetic fibers such as polyethylene or polypropylene, polyester, and polyamide (including composite fibers such as core-sheath fibers in addition to single-component fibers), regenerated fibers such as rayon or cuprammonium cellulose, and natural fibers such as cotton can be selected without particular limitation, and they can also be mixed. To improve the softness of the nonwoven fabric, it is preferable to use crimped fibers as constituent fibers. Furthermore, the constituent fibers of the nonwoven fabric can be hydrophilic fibers (including fibers that become hydrophilic using hydrophilic agents), hydrophobic fibers, or water-repellent fibers (including fibers that become water-repellent using water-repellent agents). In addition, nonwoven fabrics are generally classified according to fiber length, sheet formation method, fiber bonding method, and lamination structure into short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bonding (hot air) nonwoven fabrics, needle-punched nonwoven fabrics, dot-bonded nonwoven fabrics, and laminated nonwoven fabrics (including SMS nonwoven fabrics and SMMS nonwoven fabrics with meltblown layers sandwiched between spunbond layers). However, any of these types of nonwoven fabrics can be used.

[0050] Figures 1 to 4 An example of a pad-type disposable diaper 100 is shown. This pad-type disposable diaper 100 is used to lay on the inner surface of the outer part of a pant-type disposable diaper, etc. It is narrow in width and does not have side wings SF extending laterally from the absorbent body 56, but as... Figure 7 As shown, it may also have a pair of side wings SF that do not have absorbent body 56, extending laterally beyond the two side edges of absorbent body 56. The pad-type disposable diaper 100 in this example has: a crotch portion M, a front region F extending forward from the crotch portion M, and a rear region B extending backward from the crotch portion M. Here, the crotch portion M, when the absorbent body 56 has a narrowing region 56N (described later), refers to the area LD in the front-back direction having the narrowing region 56N; when the absorbent body 56 does not have a narrowing region 56N, it refers to the portion located at the center of the front-back direction LD, and the dimension of the front-back direction LD is 20% to 30% of the total length Y of the product.

[0051] In this example, the pad-type disposable diaper 100 is a rectangle with long sides (two side edges) along the front and back direction, but it can also be appropriately modified, such as by further cutting off the four corners or cutting off the two sides of the crotch area M.

[0052] This example shows 100 pad-type disposable diapers. Figures 1 to 4As shown, it has: an absorbent body 56 for absorbing and retaining urine, a packaging sheet 58 for wrapping the absorbent body 56, a top sheet 30 provided on the front side of the absorbent body 56, a bottom waterproof sheet 11 provided on the back side of the absorbent body 56, and upright pleats 60 provided on both sides of the surface in the width direction WD, which stand up from the beginning 61 extending along the front-rear direction LD.

[0053] (Top slide)

[0054] The top sheet 30 is a liquid-permeable sheet, such as a porous or non-porous nonwoven fabric, a porous plastic sheet, etc. Furthermore, the top sheet 30 can be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets together. Similarly, the top sheet 30 can be composed of a single sheet or two or more sheets in the planar direction.

[0055] The two sides of the top piece 30 extend in a manner that forms part of the raised pleats 60, as shown in the example figure, or they can be as follows: Figure 5 As shown in the example, the side edge of the absorbent member 50 is folded back towards the back side, passing between the bottom waterproof sheet 11 and the raised pleats 60, and then wrapped around to the back side of the absorbent member 50. Alternatively, it can be done as shown in the example. Figure 7 As shown in the example, instead of folding back at the side edge of the absorbing member 50, it protrudes laterally from the side edge of the absorbing member 50 to form part of the side wing SF.

[0056] To prevent misalignment relative to the back side component, it is preferable to use a joining method that utilizes material welding, such as heat sealing or ultrasonic sealing, or a hot melt adhesive to fix the top sheet 30 to the component adjacent to the back side. In the example shown, the top sheet 30 is fixed to the portion of the packaging sheet 58 located on the front side of the absorber 56 by applying a hot melt adhesive to its back side.

[0057] (Waterproof sheet at the bottom)

[0058] The material of the bottom waterproof sheet 11 is not particularly limited. Examples include waterproof resin films made of polyolefin resins such as polyethylene and polypropylene, and waterproof nonwoven fabrics. From the viewpoint of preventing stuffiness, a breathable material is preferred as the bottom waterproof sheet 11. As a breathable waterproof resin film, a microporous waterproof resin film obtained by the following method is preferred: after mixing an inorganic filler in a polyolefin resin such as polyethylene or polypropylene to form a sheet, it is stretched in a uniaxial or biaxial direction.

[0059] (Absorber)

[0060] The absorber 56 can be formed from an aggregate of fibers. Besides an aggregate formed by piling short fibers such as pulp or synthetic fibers, an aggregate of filaments obtained by opening tows (fiber bundles) of synthetic fibers such as cellulose acetate, as needed, can also be used. The unit area weight of the fiber, in the case of piling short fibers or pulp, can be, for example, set to approximately 100 g / m². 2 ~450 g / m 2 In the case of filament assemblies, for example, it can be set to approximately 30 g / m. 2 ~120 g / m 2 In the case of synthetic fibers, the fineness is, for example, 1 dtex to 16 dtex, preferably 1 dtex to 10 dtex, and more preferably 1 dtex to 5 dtex. In the case of filament assemblies, the filaments may also be non-crimped fibers, but crimped fibers are preferred. The crimp degree of the crimped fibers can be set, for example, to 5 to 75 crimps per 2.54 cm, preferably 10 to 50 crimps, and more preferably about 15 to 50 crimps. In addition, uniformly crimped fibers can be used. It is preferable to disperse and maintain highly absorbent polymer particles in the absorbent 56.

[0061] The absorbent body 56 can be appropriately sized as long as it extends from a position slightly forward of the crotch portion M to a position slightly backward of the crotch portion M, but preferably it extends to the periphery of the product or its vicinity in both the front-to-back direction LD and the width direction WD. It should be noted that the symbol 56X indicates the full width of the absorbent body 56, and the symbol 56Y indicates the full length of the absorbent body 56.

[0062] The absorber 56 can also be rectangular, but as... Figure 1 As shown, if the absorbent body 56 has a front region F, a rear region B, and a narrower region 56N located between them that is narrower than the front region F and the rear region B (roughly hourglass-shaped when viewed from above), the fit between the absorbent body 56 itself and the raised pleats 60 and the leg circumference is improved, which is therefore preferable. In this case, the width of the narrower region 56N (the width of the narrowest part of the absorbent body 56) can be appropriately determined, for example, it can be 0.5 to 0.8 times the full width 56X of the absorbent body 56.

[0063] (Highly absorbent polymer particles)

[0064] The absorbent body 56 may contain part or all of highly absorbent polymer particles. In addition to "particles," highly absorbent polymer particles may also include "powders." The highly absorbent polymer particles can be those used directly in this type of disposable diaper. For example, ideally, the proportion of residual particles on the sieve should be 30 wt% or less when sieved using a 500 μm standard sieve (JIS Z8801-1:2006) (shaking for 5 minutes). Alternatively, ideally, the proportion of residual particles on the sieve should be 60 wt% or more when sieved using a 180 μm standard sieve (JIS Z8801-1:2006) (shaking for 5 minutes).

[0065] The materials used for highly absorbent polymer particles are not particularly limited, but materials with a water absorption capacity of 40 g / g or more are preferred. Highly absorbent polymer particles can be starch-based, cellulose-based, or synthetic polymer-based, and can include starch-acrylate (salt) graft copolymers, starch-acrylonitrile copolymer saponifications, sodium carboxymethyl cellulose crosslinks, or acrylate (salt) polymers. The shape of the highly absorbent polymer particles is preferably a commonly used powder or granular form, but other shapes are also possible.

[0066] As highly absorbent polymer particles, highly absorbent polymer particles with an absorption rate of 70 seconds or less, especially 40 seconds or less, can be appropriately used. If the absorption rate is too slow, so-called backflow can easily occur, that is, the liquid supplied into the absorbent 56 flows back to the outside of the absorbent 56.

[0067] Furthermore, highly absorbent polymer particles with a gel strength of 1000 Pa or higher can be appropriately used. Therefore, even when the absorbent 56 is configured as a swollen absorbent, the stickiness after liquid absorption can be effectively suppressed.

[0068] The weight per unit area of ​​the highly absorbent polymer particles can be appropriately determined according to the absorption capacity required for the application of the absorber 56. Therefore, although it cannot be generalized, it can be set to 50~350 g / m². 2 If the polymer's unit area weight is less than 50 g / m² 2 If the absorption rate exceeds 350 g / m³, it will be difficult to ensure the absorption amount. 2 The effect will become saturated.

[0069] The ratio of fibers to highly absorbent polymer particles in absorbent 56 is not particularly limited; for example, the weight ratio of fibers to highly absorbent polymer particles can be 40:60 to 65:35.

[0070] (Packaging film)

[0071] To ensure or improve the shape retention of the absorbent 56, it is preferable to wrap the entire absorbent 56 with a wrapping sheet 58. The wrapping sheet 58 can also be omitted. When using the wrapping sheet 58, materials such as paper towels, especially crepe paper, non-woven fabric, polyethylene laminated non-woven fabric, and sheets with small holes can be used. However, when the absorbent 56 contains highly absorbent polymer particles, a sheet that prevents the highly absorbent polymer particles from leaking out is preferred. When using non-woven fabric instead of crepe paper, hydrophilic SMS non-woven fabric (SMS, SSMMS, etc.) is particularly preferred, and the material can be polypropylene, polyethylene / polypropylene composites, etc. Regarding the weight per unit area, 5 g / m² is preferred. ２ ~40 g / m ２ The preferred value is 10 g / m ２ ~30 g / m ２ .

[0072] The packaging form of the packaging sheet 58 can be appropriately determined, but from the viewpoints of ease of manufacturing and preventing leakage of highly absorbent polymer particles from the front and rear ends, it is preferable to roll it into a cylindrical shape in a way that surrounds the front and back sides and both sides of the absorbent 56, and make its front and rear edges protrude from the front and rear of the absorbent 56, and join the overlapping parts of the rolled-up parts with the overlapping parts of the front and rear protruding parts by joining means such as hot melt adhesive or material welding.

[0073] (Outer lining is made of non-woven fabric)

[0074] When the bottom waterproof sheet 11 is a waterproof resin film, and it is not preferable for the bottom waterproof sheet 11 to be exposed on the back, as shown in the example, an outer nonwoven fabric 12 can be provided on the back of the product to cover the bottom waterproof sheet 11. Alternatively, the outer nonwoven fabric 12 can be omitted. On the outside of the outer nonwoven fabric 12, as needed, similar to known pad-type disposable diapers, a fastening member 8 that can be fixed or attached to the outer diaper or underwear may be provided or omitted.

[0075] (Stand up the pleats)

[0076] The upright pleats 60 are respectively provided on both sides of the surface in the width direction WD so as to stand up from the starting end 61 extending along the front-rear direction LD. The upright pleats 60 are preferably provided from the front side region F to the rear side region B, and particularly preferably from the front side of the front end of the absorber 56 to the rear side of the rear end of the absorber 56.

[0077] To be more detailed, Figures 2 to 7The illustrated upright pleat 60 includes: a main body 66 extending from a starting end 61 along the front-rear direction LD to the center side in the width direction WD; a front folded portion 67F formed by fixing the front end of the main body 66 to a folded state and a rear folded portion 67B formed by fixing the rear end of the main body 66 to a folded state; a non-fixed upright portion 68 located between the front folded portion 67F and the rear folded portion 67B of the main body 66; and a plurality of pleat elastic members 63 along the front-rear direction LD, spaced apart along the width direction WD in the upright portion 68. The pleat elastic members 63 are fixed to the upright portion 68 when elongated along the front-rear direction LD. As a result, the upright portion 68, in its natural length state, contracts and stands upright along with the pleat elastic members 63, and elongates along with the pleat elastic members 63 according to external force, thereby achieving conformity (fitting) to the deformation of the body surface.

[0078] Furthermore, the standing pleat 60 in the example figure is of the fold-back type, with the front folded portion 67F and the rear folded portion 67B having a first portion 66a extending from the beginning 61 toward the central side in the width direction WD and a second portion 66b extending from the end of the first portion 66a toward the outer side in the width direction WD. Meanwhile, the standing portion 68 has a third portion 66c extending from the first portion 66a of the front folded portion 67F to the first portion 66a of the rear folded portion 67B and a fourth portion 66d extending from the second portion 66b of the front folded portion 67F to the second portion 66b of the rear folded portion 67B.

[0079] The feature is that the pleated elastic member 63 includes a first pleated elastic member 63a installed at the end of the third part 66c opposite to the fourth part 66d, and a second pleated elastic member 63b installed along the boundary between the third part 66c and the fourth part 66d. No pleated elastic member 63 is present at a position closer to the beginning end 61 than the second pleated elastic member 63b. As a result, the fourth part 66d remains raised at a low angle and in contact with the body surface, while the third part 66c is raised higher. The fourth part 66d may have one or multiple third pleated elastic members 63c spaced apart in the width direction WD between the first pleated elastic member 63a and the second pleated elastic member 63b.

[0080] Furthermore, the pleated waterproof sheet 64, made of a waterproof resin film, covering the third part 66c, is fixed to the main body 66 in a manner that extends throughout the entire body 66 in the front-rear direction LD. The pleated waterproof sheet 64 extends at least to the beginning 61 from a position within 5 mm (more preferably within 3 mm) in the width direction WD, closer to the beginning 61 than the second pleated elastic member 63b. The fixing area between the pleated waterproof sheet 64 and the main body 66 extends at least to the beginning 61 from a position within 5 mm (more preferably within 3 mm) in the width direction WD, closer to the beginning 61 than the end of the pleated waterproof sheet 64 on the side of the second pleated elastic member 63b. It also has a pleated nonwoven fabric 62 extending throughout the third part 66c and the fourth part 66d, while the fourth part 66d does not have the pleated waterproof sheet 64 and has fewer layers than the third part 66c. Specifically, in Figures 2 to 4 In the example shown, the third part 66c has 5 layers (2 layers of pleated nonwoven fabric 62, 1 layer of outer nonwoven fabric 12, 1 layer of pleated waterproof sheet 64, and 1 layer of top sheet 30), while the fourth part 66d has 2 layers (only pleated nonwoven fabric 62, which has 2 layers). Therefore, in the standing pleats 60 of this example, the third part 66c in the third part 66c and the fourth part 66d are generally a high-rigidity area with a particularly rigid waterproof resin film (pleated waterproof sheet 64) pasted on it. Since its end is lifted by the second pleated elastic member 63b, the folding position of the standing part 68 becomes difficult to occur outside the position along the second pleated elastic member 63b, especially difficult to bend between the second pleated elastic member 63b and the beginning 61. In other words, the third part 66c, which ensures the standing height, has high waterproofness due to the pleated waterproof sheet 64, and also high shape retention. On the other hand, the fourth part 66d does not have a highly rigid waterproof resin membrane (pleated waterproof sheet 64), and its number of layers is less than that of the third part 66c, thus it comes into soft (low rigidity) contact with the skin. Unlike the example in the figure, the pleated waterproof sheet 64 can also be provided only on the entire front-rear direction LD of the standing part 68. Furthermore, according to this viewpoint, as... Figure 5 Compared to the example shown, where the pleated nonwoven fabric 62 sandwiches the pleated waterproof sheet 64, as in the example shown, Figure 2 and Figure 3 As shown, if the pleated waterproof sheet 64 is joined to a position further inward than the pleated nonwoven fabric 62 (the central side of the width direction WD) instead of sandwiching the pleated waterproof sheet 64 with the pleated nonwoven fabric 62, the folding back of the second part 66b and the fourth part 66d relative to the first part 66a and the third part 66c is less likely to be hindered, which is therefore preferable.

[0081] In the example shown, the first part 66a and the third part 66c, in addition to the pleated waterproof sheet 64, have at least one layer of pleated nonwoven fabric 62. Furthermore, the second part 66b and the fourth part 66d also have at least one layer of pleated nonwoven fabric 62. As the pleated nonwoven fabric 62, besides using a dedicated nonwoven fabric, the sheet near the starting end 61 can also be extended. In the example shown, the raised pleats 60 are composed of pleated components 69 having a full length and full width extending from the first part 66a to the fourth part 66d. The pleated assembly 69 includes: a pleated nonwoven fabric 62 consisting of an inner layer 62a extending from the beginning 61 to the ends of the second portion 66b and the fourth portion 66d, and an outer layer 62b folded back outward from the ends of the second portion 66b and the fourth portion 66d and extending back to the beginning 61; and a pleated elastic member 63 sandwiched between the inner layer 62a and the outer layer 62b of the fourth portion 66d. The pleated assembly 69 can be as follows: Figure 5 As shown in the example, it can also join the opposing member at the root portion 65, which extends from the raised beginning 61 to a position further back than the absorber 56, as shown in the example. Figure 2 and Figure 3 As shown, in the case of a main body component (in the example, top sheet 30, bottom waterproof sheet 11, and outer nonwoven fabric 12) extending from the central side of the main body portion 66 (at least the first portion 66a and the third portion 66c) in the width direction WD of the main body portion component, it engages with the main body component portion (in the example, the folded portion of the top sheet 30, bottom waterproof sheet 11, and outer nonwoven fabric 12) of this main body component. In particular, in the latter case, as... Figures 2 to 4 and Figure 6 (a) Figure 6 As shown in examples (c), if the side edge of the main body component is located within 5 mm (more preferably within 3 mm) in the width direction WD, further from the beginning 61 than the second pleat elastic member 63b, and the pleat assembly 69 is joined to the outside of the main component, then the folding back of the second part 66b and the fourth part 66d relative to the first part 66a and the third part 66c is less likely to be hindered, and is therefore preferred. Conversely, it is also possible to... Figure 6 As shown in (b), the pleat assembly 69 is joined to the inside of the main component.

[0082] Top film 30 can also be like Figure 5 As shown in the example, the absorber 56 is folded back along both sides of its back surface, but preferably as shown in the example. Figure 2 and Figure 3As shown, the top sheet 30 has a top sheet extension portion extending to both sides of the absorbent 56 in the width direction WD. The top sheet extension portion has a top sheet fold-back portion that folds back towards the front side at the beginning end 61. The top sheet fold-back portion extends from the beginning end 61 to a position within ±5 mm (more preferably within ±3 mm) in the width direction WD, based on the end of the second pleated elastic member 63b side of the pleated waterproof sheet 64, and is fixed to the pleated waterproof sheet 64. The fixed area of ​​the top sheet fold-back portion and the pleated waterproof sheet 64 extends at least to the beginning end 61 from the top sheet fold-back portion at a position within 5 mm (more preferably within ±3 mm) in the width direction WD, further from the end of the second pleated elastic member 63b side than the end of the second pleated elastic member 63b side. In other words, preferably, the two sides of the top sheet 30 constitute at least a third portion 66c of the raised pleat 60 (including the first portion 66a in the example shown in the figure). Thus, if the top piece 30 extends laterally and folds back along the main part of the raised pleat 60, and is fixed relative to the raised part 68, the restoring force of the folding back relative to the top piece 30 functions in such a way that the third part 66c is raised from the beginning end 61. At the same time, the rigidity of the third part 66c is further enhanced, making it more difficult for bending to occur between the second pleat elastic member 63b and the beginning end 61. In addition, as shown in the example, if the folded-back portion of the top piece forms the innermost surface of the main body 66, and almost all or all of the inner surface of the pleated waterproof sheet 64 is covered, the waterproof resin film is less likely to come into contact with the skin, which is therefore preferable.

[0083] like Figure 5 As shown in the example, the bottom waterproof sheet 11 is only disposed on the back side of the absorbent 56, and the pleated waterproof sheet 64 can be made of a different waterproof resin film than the bottom waterproof sheet 11. However, if the bottom waterproof sheet 11 is made of a waterproof resin film, such as Figure 2 and Figure 3 As shown, the bottom waterproof sheet 11 has extended portions extending to both sides in the width direction of the absorbent 56. These extended portions have folded-back portions that fold back towards the front side at the beginning 61. Preferably, the folded-back portions form a pleated waterproof sheet 64. That is, it is preferable that both sides of the bottom waterproof sheet 11 form at least a third portion 66c of the raised pleats 60 (in the example shown, this also includes the first portion 66a). This reduces the number of waterproof resin films used, while the restoring force relative to the fold of the bottom waterproof sheet 11 functions to raise the third portion 66c from the beginning 61.

[0084] Preferably, when the outer nonwoven fabric 12 is provided, the outer nonwoven fabric 12 has an outer extension portion extending to both sides of the absorbent 56 in the width direction WD. The outer extension portion has an outer fold-back portion folded back towards the front side at the beginning end 61. The outer fold-back portion extends from the beginning end 61 to a position within ±5 mm (more preferably within ±3 mm) in the width direction WD, based on the end of the second pleated elastic member 63b side of the pleated waterproof sheet 64, and is fixed to the pleated waterproof sheet 64. The fixed area of ​​the outer fold-back portion and the pleated waterproof sheet 64 extends at least to the beginning end 61 from the outer fold-back portion at a position within 5 mm (more preferably within 3 mm) in the width direction WD, further from the end of the second pleated elastic member 63b side than the end of the second pleated elastic member 63b side. In other words, preferably, both sides of the outer nonwoven fabric 12 constitute at least a third part 66c of the raised pleat 60 (including the first part 66a in the example shown in the figure). In this way, if the outer nonwoven fabric 12 extends laterally and is folded back along the main part of the raised pleat 60 and fixed relative to the raised part 68, the restoring force of the folding back of the outer nonwoven fabric 12 acts in a way that raises the third part 66c from the beginning 61. At the same time, the rigidity of the third part 66c is further enhanced, making it more difficult for bending to occur between the second pleat elastic member 63b and the beginning 61. In addition, as shown in the example, if the folded-back portion of the outer nonwoven fabric forms the outermost surface of the main body 66, and the outer surface of the pleated waterproof sheet 64 is completely or almost completely covered, the waterproof resin film is unlikely to come into contact with the skin, which is therefore preferable.

[0085] The end of the second pleated elastic member 63b side of the pleated waterproof sheet 64 can be connected to the end of the second pleated elastic member 63b side of the sheet constituting the third part 66c (top sheet 30 and outer nonwoven fabric 12 in the example figure, excluding the pleated assembly 69) as follows: Figures 2 to 4 As shown, they can be aligned (overlapping in the thickness direction), or they can be offset. For example, as shown... Figure 6 As shown in (a), if the innermost pieces of the sheet and the pleated waterproof sheet 64 constituting the third part 66c (i.e., in the example shown, in the order of outer nonwoven fabric 12, pleated waterproof sheet 64, and top sheet 30) increase in the distance between their ends and the second pleated elastic member 63b in the width direction WD by an increment of 5 mm or less (more preferably 3 mm or less), then the change in thickness of the third part 66c becomes more gradual, and the skin feel becomes better, which is therefore preferred.

[0086] In addition, such as Figure 6As shown in (b), it is preferable that the distance between the end of the pleated waterproof sheet 64 and the second pleated elastic member 63b in the width direction WD is within 5 mm (more preferably within 3 mm) greater than the distance between the end of the sheet constituting the third part 66c (excluding the pleated assembly 69) and the second pleated elastic member 63b in the width direction WD, thereby concealing the entire pleated waterproof sheet 64. According to the same viewpoint, it is preferable that the outermost sheets (i.e., in the example shown, in the order of outer nonwoven fabric 12, pleated waterproof sheet 64, and top sheet 30) have their distance between their ends and the second pleated elastic member 63b in the width direction WD increased in increments of 5 mm (more preferably within 3 mm), thus concealing the entire pleated waterproof sheet 64.

[0087] The stiffness, measured by the 45° cantilever method and determined as a whole by cutting out the third part 66c, is preferably 80 mm to 150 mm. The stiffness of each piece constituting the third part 66c can be appropriately determined; preferably, the stiffness of the top piece 30, measured by the 45° cantilever method, is 10 mm to 80 mm (preferably 20 mm to 70 mm). Furthermore, the stiffness of the outer nonwoven fabric 12, measured by the 45° cantilever method, is preferably 10 mm to 80 mm (preferably 20 mm to 70 mm). Further, the stiffness of the pleated nonwoven fabric 62, measured by the 45° cantilever method, is preferably 10 mm to 80 mm (preferably 20 mm to 70 mm). Furthermore, the fourth part 66d does not have a top sheet 30, a pleated waterproof sheet 64, or a bottom sheet, and therefore has a particularly low stiffness compared to the third part 66c, which has them. It is preferably the same as or close to the stiffness of the third part 66c, which has removed the top sheet 30, the pleated waterproof sheet 64, and the bottom sheet (0.2 to 0.8 times, more preferably 0.3 to 0.7 times, the stiffness of the third part 66c).

[0088] On the other hand, in order to improve the fit of the crotch area M, such as Figure 1 As shown, a narrower region 56N, narrower than its front and rear sides, is often provided in the middle of the absorber 56 in the front-rear direction LD. In this case, the region SA between the side edge of the narrower region 56N and the beginning 61 of the raised pleat 60 (see reference) Figure 2 This will increase the height of the raised pleats 60 in the crotch area M. However, for example, if the dimension of this area SA in the width direction WD is about 8 mm to 25 mm, the distance d1 between the beginning end 61 and the second pleat elastic member 63b in the width direction WD (refer to...) Figure 1The thickness is approximately 10 mm to 25 mm. Due to the increased standing height caused by region SA, the force applied to the third part 66c becomes more complex, making it prone to undesirable bending between the second pleated elastic member 63b and the beginning end 61. Therefore, it is particularly meaningful to enhance the rigidity of the third part 66c using the aforementioned pleated waterproof sheet 64 in this case.

[0089] <Explanation of Terms in the Instruction Manual>

[0090] Unless otherwise specified in the instruction manual, the following terms shall have the following meanings.

[0091] • The “front-back direction” refers to the direction indicated by the symbol LD in the figure (vertical direction), and the “width direction” refers to the direction indicated by the symbol WD in the figure (left-right direction). The front-back direction is orthogonal to the width direction.

[0092] • "Front side" refers to the side that is closest to the wearer's skin when worn, while "back side" refers to the side that is furthest from the wearer's skin when worn.

[0093] • "Surface" refers to the side of the garment that is close to the wearer's skin when worn, while "back" refers to the side that is away from the wearer's skin when worn.

[0094] • "Elongation" refers to the value when the natural length is set to 100%. For example, an elongation of 200% has the same meaning as an elongation ratio of 2.

[0095] • “Gel strength” was determined as follows: 1.0 g of a highly absorbent polymer was added to 49.0 g of artificial urine (a mixture of urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt%), and the mixture was stirred. The resulting gel was placed in a constant temperature and humidity bath at 40°C × 60%RH for 3 hours, then allowed to return to room temperature. The gel strength was then measured using a curdmeter (I.techno Engineering: Curdmeter-MAX ME-500).

[0096] • “Weight per unit area” is determined as follows: After pre-drying the sample or test piece, place it in a test chamber or apparatus under standard conditions (temperature 23 ± 1℃, relative humidity 50 ± 2%) to achieve a constant weight. Pre-drying refers to bringing the sample or test piece to a constant weight state at 100℃. Note that pre-drying is not required for fibers with a standard moisture regain of 0.0%. Using a sample collection template (100 mm × 100 mm), cut a 100 mm × 100 mm sample from the constant weight test piece. Measure the weight of the sample and multiply it by 100 to calculate the weight per square meter; this weight is taken as the weight per unit area.

[0097] • The “thickness” of thicker components such as absorber 56, absorber 50, and inner body 200 is measured using a thickness gauge (PEACOCK, dial type thickness gauge, model H (measuring range 0 mm to 10 mm, circular terminal with measuring area diameter of 10 mm, measuring force of approximately 1.7 N, pressure of approximately 21.7 KPa)) manufactured by Ozaki Manufacturing Co., Ltd., with the sample and thickness gauge being level.

[0098] • The "thickness", "compressive rigidity (LC) in the thickness direction", and "restorative rigidity (RC) in the thickness direction" of non-woven fabrics and other thin sheets were measured using an automatic thickness gauge (KES-G5 portable compression measuring instrument) at a load of 0.098 N / cm. 2 Pressurized area: 2 cm 2 Automatically measured under certain conditions.

[0099] • The water absorption was determined according to JIS K7223-1996 "Test method for water absorption of superabsorbent resin".

[0100] • The water absorption rate is the time to the endpoint when using 2 g of superabsorbent polymer and 50 g of physiological saline to perform the JIS K7224-1996 "Test method for water absorption rate of superabsorbent resin".

[0101] • "Unfolded state" refers to a flat, unfolded state, such as no contraction (including any contraction caused by elastic components) or relaxation.

[0102] Unless otherwise specified, the dimensions of each part refer to the dimensions in the unfolded state, not the dimensions in the natural length state.

[0103] • In the absence of records regarding the environmental conditions of the test or measurement, it shall be assumed that the test or measurement was conducted in a laboratory or apparatus under standard conditions (temperature 23 ± 1℃, relative humidity 50 ± 2%).

[0104] Industrial applicability

[0105] This invention applies to shorts-type disposable diapers as described in the examples above.

[0106] Explanation of reference numerals in the attached figures

[0107] 11…bottom waterproof sheet, 30…top sheet, 56…absorbent body, 56N…narrowing area, 58…packaging sheet, 60…standing pleat, 61…starting end, 62…pleated nonwoven fabric, 62a…inner layer, 62b…outer layer, 63…pleated elastic component, 63a…first pleated elastic component, 63b…second pleated elastic component, 63c…third pleated elastic component, 64…pleated waterproof sheet, 65…root portion, 66…main body, 66a…first part, 66b…second part, 66c…third part, 66d…fourth part, 67F…front folded portion, 67B…rear folded portion, 68…standing portion, 69…pleated assembly, B…rear area, F…front area, LD…front-back direction, M…crotch area, WD…width direction.

Claims

1. A disposable garment comprising raised pleats respectively disposed on both sides of a surface in the width direction, extending from an initial end in the front-to-back direction. The standing pleat has: a main body extending from the beginning end toward the center side in the width direction; a front folded portion formed by fixing the front end of the main body in a folded state and a rear folded portion formed by fixing the rear end of the main body in a folded state; A non-fixed upright portion located between the front collapsed portion and the rear collapsed portion of the main body; And in the erected portion, a plurality of pleated elastic members in the front-to-back direction are installed at intervals along the width direction, and The front and rear collapsed portions each have a first portion extending from the beginning towards the center in the width direction and a second portion extending from the end of the first portion outward in the width direction; simultaneously, the upright portion has a third portion extending from the first portion of the front collapsed portion to the first portion of the rear collapsed portion and a fourth portion extending from the second portion of the front collapsed portion to the second portion of the rear collapsed portion, characterized in that... The pleated elastic component includes a first pleated elastic component installed at the end portion of the third portion opposite to the fourth portion, and a second pleated elastic component installed along the boundary between the third portion and the fourth portion; The pleated elastic member is not present at a position closer to the starting end than the second pleated elastic member; The pleated waterproof sheet made of waterproof resin film covering the third part is fixed to the erected part in a manner that is integral in the front-back direction at least throughout the erected part; The pleated waterproof sheet extends at least to the beginning end from a position within 5 mm of the beginning end side of the second pleated elastic member; The fixing area of ​​the pleated waterproof sheet and the raised portion extends at least 5 mm from the end of the pleated waterproof sheet, closer to the starting end than the end of the second pleated elastic member, to the starting end; and The raised pleats have pleated nonwoven fabric extending across the third and fourth portions, while the fourth portion does not have a pleated waterproof sheet and has fewer layers than the third portion.

2. The disposable wearable article according to claim 1, comprising: an absorbent body; and A liquid-permeable top sheet is disposed on the front side of the absorber, wherein... The top sheet has extended portions that extend to both sides in the width direction of the absorber. The extended portion of the top piece has a folded-back portion that folds back towards the front side at the beginning end. The folded-back portion of the top sheet extends from the starting end to a position within ±5 mm in the width direction, based on the end of the second pleated elastic member side of the pleated waterproof sheet, and is fixed to the pleated waterproof sheet. The top sheet fold-back portion and the fixed area of ​​the pleated waterproof sheet extend at least 5 mm from the top sheet fold-back portion to the beginning end, beyond the end of the second pleated elastic member.

3. The disposable wearable article according to claim 2, wherein a bottom waterproof sheet made of a waterproof resin film is disposed on the back side of the absorbent body. The bottom waterproof sheet has extended portions that extend to both sides in the width direction of the absorbent. The extended portion of the bottom waterproof sheet has a folded-back portion that folds back towards the front side at the beginning end, and The folded-back portion of the bottom waterproof sheet constitutes the pleated waterproof sheet.

4. The disposable wearable article according to claim 3, wherein it has an outer nonwoven fabric disposed on the back side of the absorbent body. The outer nonwoven fabric has an outer extension portion extending to both sides in the width direction of the absorbent. The outer extension has an outer fold-back portion that folds back towards the front at the starting end. The outer fold-back portion extends from the starting end to a position within ±5 mm in the width direction, based on the end of the second pleat elastic member side of the pleated waterproof sheet, and is fixed to the pleated waterproof sheet. The outer fold-back portion and the fixing area of ​​the pleated waterproof sheet extend at least 5 mm from the beginning end of the outer fold-back portion, beyond the end of the second pleated elastic member.

5. The disposable garment according to any one of claims 1 to 4, wherein, The stiffness of the third part, measured by the 45° cantilever method, is 80 mm to 150 mm.

6. The disposable garment according to any one of claims 2 to 4, wherein, The absorber has a narrowed region in the width direction at its middle portion in the front-to-back direction. The distance between the side edge of the narrowest part in the narrowing region and the beginning end in the width direction is 5 mm to 20 mm, and The distance between the starting end and the second pleated elastic member in the width direction is 10 mm to 25 mm.

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