RU167436U9 - Disposable diaper - Google Patents

Abstract

The disposable diaper (1) of the present utility model includes an outer shell (5) located on the side not facing the skin of the surface of the absorbent block (10). The outer shell (5) includes an outer sheet (51) and an inner sheet (52), and also includes those located between the outer sheet (51) and the inner sheet (52): elastic elements (53) placed in a stretched state in the transverse direction (direction Y); and continuous adhesive sections (54) oriented in the transverse direction (Y direction) and spaced apart in the longitudinal direction (X direction). The outer shell (5) includes an elastic region ET. The elastic region ET is formed so that a plurality of elastic elements (53) are spaced apart in the longitudinal direction (X direction); one or more continuous adhesive sections (54) are placed between each pair of elastic elements (53) adjacent to each other in the X direction; the outer sheet (51) and the inner sheet (52) are fastened to each other by continuous adhesive sections (54).

Description

The technical field to which the utility model relates.

The present utility model relates to a disposable diaper, such as a stretchable disposable diaper.

State of the art

A stretchable disposable diaper, which is one example of a disposable diaper, includes an outer shell located on the outer side of the absorbent block, elongated in the longitudinal direction and includes an absorbent element. In general, the outer shell includes an outer sheet, an inner sheet and elastic elements located between the outer sheet and the inner sheet in a stretched state along the transverse direction of the disposable diaper. When these elastic elements are compressed, folds form on the outer shell.

For example, Japanese Patent No. 2628173 describes a method in which the outer shell is connected together by means of an adhesive pattern formed by continuous adhesive lines parallel to each other that intersect with elastic elements placed in a stretched state along the transverse direction. As indicated with respect to the disposable diaper described in Japanese Patent No. 2628173, folds with a soft, wavy surface are formed on the outer shell by an adhesive pattern, and softness is improved.

In addition, the pull-on disposable diaper includes an outer shell located on the outside of the absorbent block, elongated in the longitudinal direction and including the absorbent element. In general, the outer shell includes an outer sheet, an inner sheet, and a plurality of near-leg elastic elements located between the outer sheet and the inner sheet in a stretched state along each leg opening of the stretchable disposable diaper. In general, such near-legged elastic elements that are placed in a stretched state in a curved shape along each leg opening are fixed by applying glue to the entire surface between the outer sheet and the inner sheet. When these perineal elastic elements are compressed, folds form on the outer shell.

For example, JP 11-216160 A describes a pull-on disposable diaper in which the inner and outer sheets and the near-leg elastic elements are bonded and fixed with adhesive applied by a pattern of transverse strips between the outer sheet and the inner sheet. In those cases when the adhesive is applied with a pattern of transverse stripes, the air permeability of the outer shell in comparison with cases when the adhesive is applied to the entire surface, is improved; in addition, since the amount of glue can be reduced, the outer shell can be made softer, its texture improves.

JP 2008-212278 A describes another method, which consists in fixing the absorbent block and the outer shell by applying glue in strips along the transverse direction, so that the width of the glue strip located in the crotch region of the diaper is greatest.

ESSENCE OF A USEFUL MODEL

The technical result of the claimed disposable diaper is improved breathability.

The present utility model (the first utility model) relates to a disposable diaper, including: an absorbent block including an upper sheet, a lower sheet and an absorbent element located between the upper sheet and the lower sheet; and an outer shell located on the side of the non-skin surface of the absorbent block. The outer shell includes an outer sheet located on the side of the non-skin surface, which forms the outer surface of the disposable diaper, and an inner sheet located on the side of the skin facing the surface, and also includes those between the outer sheet and the inner sheet: elastic elements placed stretched in the transverse direction of the disposable diaper; and continuous adhesive sections oriented in the transverse direction and spaced at intervals in the longitudinal direction of the disposable diaper. The outer shell includes an elastic region. The elastic region is formed so that: a plurality of elastic elements are placed at intervals in the longitudinal direction of the disposable diaper; one or more continuous adhesive sections are placed between each pair of elastic elements adjacent to each other in the longitudinal direction; the outer sheet and the inner sheet are bonded to each other by continuous adhesive sections.

The present utility model (second utility model) relates to a pull-on disposable diaper, including: an absorbent block including an upper sheet, a lower sheet and an absorbent element located between the upper sheet and the lower sheet; and an outer shell located on the side of the surface of the absorbent block not facing the skin; however, the disposable diaper includes a pair of side seams, a hole for the waist and a pair of leg openings formed by connecting the transverse lateral edge portions of the front region of the outer shell with the corresponding transverse lateral edge portions of the rear region of the outer shell. The outer shell includes an outer sheet located on the side of the non-skin surface, which forms the outer surface of the disposable diaper, and an inner sheet located on the side of the skin facing the surface, and also includes those between the outer sheet and the inner sheet: a plurality of near-leg elastic elements, placed in a stretched state in a curved form along each leg opening; and a plurality of subcutaneous adhesive portions for fixing peritoneal elastic elements. In a plan view, in a state where the pull-on disposable diaper is deployed and flattened, a plurality of glue sections are arranged along the transverse direction of the pull-on disposable diaper in that region in the longitudinal direction of the pull-on disposable diaper, in which there are a plurality of gusset elastic elements. The plurality of glue sections are arranged so that there are two or more different intervals, which are the intervals between each pair of glue sections, adjacent in the longitudinal direction of the stretchable disposable diaper.

Brief Description of the Drawings

FIG. 1 is a perspective view illustrating a state in which a stretchable disposable diaper according to one embodiment of the present utility model (first utility model) is used (in which it is worn).

FIG. 2 is an expanded plan view from the side of the skin-facing surface of the diaper shown in FIG. 1, in a deployed and flattened state.

FIG. 3 is a detailed plan view from the non-skin surface of the diaper of FIG. 1, in a deployed and flattened state.

FIG. 4 is an enlarged plan view explaining in enlargement the main parts of the diaper shown in FIG. 3.

FIG. 5 is a section along V-V in FIG. one.

FIG. 6 is a section along VI-VI in FIG. one.

FIG. 7 is a perspective view illustrating a state in which a stretchable disposable diaper according to a first embodiment of the present utility model (second utility model) is used (in which it is worn).

FIG. 8 is a detailed plan view from the side of the skin-facing surface of the diaper shown in FIG. 7, in a deployed and flattened state.

FIG. 9 is a section along III-III in FIG. 8.

FIG. 10 is a plan view from above of the non-skin surface of the diaper of FIG. 7, in a deployed and flattened state.

FIG. 11 is an enlarged plan view explaining in enlargement the main parts of the diaper shown in FIG. 10.

FIG. 12 is a section along VI-VI in FIG. 7.

FIG. 13 is a detailed plan view (corresponding to FIG. 10) from the side of the non-skin surface of the pull-on disposable diaper according to the second embodiment of the present utility model (second utility model) in an unfolded and flattened state.

DETAILED DESCRIPTION OF A USEFUL MODEL

Japanese Patent No. 2628173 does not say anything about the relative position of the adhesive and elastic elements placed in a stretched state along the transverse direction. In addition, there is a need to further increase the softness of the outer shell and improve its appearance.

Thus, the present utility model (the first utility model) provides a disposable diaper in which these disadvantages of the prior art are overcome.

In addition, JP 11-216160 A merely states that transverse adhesive stripes are applied to the entire area between the outer sheet and the inner sheet, and nothing is said specifically about the area on which the adhesive is to be applied. In addition, JP 11-216160 A does not say anything about changing the intervals between the transverse adhesive strips.

On the other hand, the adhesive strips described in JP 2008-212278 A are for fixing the absorbent block and the outer shell, as described above, and not for fixing the near-leg elastic elements located between the outer sheet and the inner sheet in a stretched state in a curved shape along the leg openings. Thus, JP 2008-212278 A does not say anything about how fixed the near-leg elastic elements between the outer sheet and the inner sheet.

Thus, the present utility model (the second utility model) provides a pull-on disposable diaper in which these disadvantages of the prior art are overcome.

The present utility model (the first utility model) provides a disposable diaper including: an absorbent block including an upper sheet, a lower sheet and an absorbent element located between the upper sheet and the lower sheet ;, and an outer shell located on the side of the surface of the absorbent block not facing the skin; while the outer shell includes an outer sheet located on the side not facing the skin of the surface, which forms the outer surface of the disposable diaper, and the inner sheet located and the side facing the skin surface, and also comprises located between the outer sheet and the inner sheet: elastic members placed in a stretched state in the transverse direction of the disposable diaper; and continuous adhesive sections oriented in the transverse direction and spaced at intervals in the longitudinal direction of the disposable diaper; the outer shell includes an elastic region; the elastic region is formed so that: a plurality of elastic elements are placed at intervals in the longitudinal direction of the disposable diaper; one or more continuous adhesive sections are placed between each pair of elastic elements adjacent in the longitudinal direction; the outer sheet and the inner sheet are bonded to each other by continuous adhesive sections.

The present utility model (second utility model) provides a pull-on disposable diaper comprising: an absorbent block including an upper sheet, a lower sheet and an absorbent element located between the upper sheet and the lower sheet; and an outer shell located on the side of the surface of the absorbent block not facing the skin; however, the disposable diaper includes a pair of side seams, an opening for the waist and a pair of leg openings formed by connecting the transverse lateral edge portions of the front region of the outer shell with the corresponding transverse lateral edge portions of the rear region of the outer shell; wherein: the outer shell includes an outer sheet located on the side of the non-skin surface, which forms the outer surface of the disposable diaper, and an inner sheet located on the side of the skin facing the surface, and also includes those located between the outer sheet and the inner sheet: elastic elements placed in a stretched state in a curved form along each leg opening; and a plurality of perineal adhesive sites for fixing the perineal elastic elements; in a plan view, in a state where the pull-on disposable diaper is deployed and flattened, a plurality of glue sections are arranged along the transverse direction of the pull-on disposable diaper in that region in the longitudinal direction of the pull-on disposable diaper, in which there are a plurality of gusset elastic elements; and a plurality of circumflex adhesive sections are arranged such that there are two or more different intervals, which are the intervals between each pair of circumflex adhesive sections adjacent in the longitudinal direction of the stretchable disposable diaper.

Hereinafter, the present utility model (first utility model) is described in accordance with a preferred embodiment with reference to the drawings. As shown in FIG. 1-3, a disposable diaper 1 (hereinafter also referred to as “diaper 1”), corresponding to one embodiment of the present utility model (first utility model), is a diaper comprising: an absorbent block 10 elongated in the longitudinal direction, which includes permeable to liquid top sheet 2, moderately permeable to liquid bottom sheet 3 and an absorbent element 4 located between the top sheet 2 and the bottom sheet 3; and the outer shell 5, located on the side of the surface of the absorbent block not facing the skin 10. More specifically, in a plan view in a deployed and flattened state, the outer shell 5 of the diaper 1 is divided into: the front region A located in front of the user when the diaper is on he is wearing; the back area B, located behind the user when the diaper is put on; and the crotch region C located between the front region A and the rear region B. The diaper 1 is a so-called stretchable disposable diaper equipped with a pair of side seams S, S and a pair of leg openings LO, LO formed by connecting the transverse lateral edge sections 5a1, 5a1 of the outer shell 5 in the front region A with the corresponding transverse lateral edge sections 5b1, 5b1 of the outer shell 5 in the rear region B.

As used herein, the term “skin-facing surface” means the surface of the diaper 1 or its component parts (for example, the absorbent block 10), which faces the skin of the wearer when the diaper is on. The term “non-skin-facing” means the surface of the diaper 1 or its components, which is turned to the side (to the clothes), the opposite of the skin of the user when the diaper is worn on it. In the diaper 1, the longitudinal direction (X direction) corresponds to the direction along the long side of the diaper 1 or the elongated absorbent block 10, which is an integral part thereof. The transverse direction (Y direction) corresponds to the width direction of the disposable diaper or absorbent block, which is an integral part thereof.

The diaper is made symmetrical with respect to the longitudinal center line CL1 oriented in the longitudinal direction (X direction). It should be noted that “CL2” in FIG. 2 and 3 is a transverse center line oriented in the transverse direction (Y direction), which divides the diaper 1 in two and is perpendicular to the longitudinal center line CL1.

The state when said diaper 1 is deployed and spread out on a plane corresponds to a state in which the side seams S are disconnected so that the diaper can be expanded (expanded) and the elastic elements in different parts of the expanded diaper 1 are stretched so that the diaper is deployed to its design size (the size of the diaper extended on the plane in a state where the influence of elastic elements is completely excluded), as shown in FIG. 2 and 3.

As shown in FIG. 2, the absorbent block 10 has an elongated shape, wherein one of its dimensions (in the longitudinal direction (X direction)) is relatively large. The absorbent block 10 includes: a liquid permeable topsheet 2, which forms a surface facing the skin; moderately permeable to liquid (including water-repellent) bottom sheet 3, which forms a surface not facing the skin; a liquid retaining absorbent member 4 located between the upper sheet 2 and the lower sheet 3. As shown in FIG. 2, the side cuffs 6, 6, each of which includes an elastic element placed in a stretched state in the longitudinal direction (X direction), are located on the respective lateral sides of the absorbent block 10, which are oriented in the longitudinal direction (X direction). More specifically, each side cuff 6 is made of liquid impermeable / water-repellent and breathable material and includes an elastic element 61 forming a sealing cuff located near the free end of the side cuff while being stretched in the longitudinal direction (X direction). When the diaper is worn, the compression of the elastic elements 61 forming the sealing cuff causes the free ends of the respective side cuffs 6 to rise, thereby forming sealing cuffs that prevent the body fluids from flowing out in the transverse direction (Y direction).

The absorbent block 10 with the above-described structure is connected by adhesive to the central part of the outer shell 5 so that the longitudinal direction (X direction) of the absorbent block corresponds to the longitudinal direction (X direction) of the diaper 1 in the unfolded and flattened state. In the direction of the thickness of the disposable diaper 1, the outer shell 5 is bonded and fixed by placing on the side of the surface of the lower sheet 3 not forming the skin, forming an absorbent block 10.

As shown in FIG. 2 and 3, the outer shell 5 includes an outer sheet 51 located on the side of the non-skin surface that forms the outer surface of the diaper 1, and an inner sheet 52 located on the side of the skin-facing surface, and also includes those located between the outer sheet 51 and inner sheet 52: elastic elements 53 placed in a stretched state along the transverse direction (Y direction); and continuous adhesive sections 54 (cf. FIG. 4) oriented in the transverse direction (Y direction) and applied at intervals in the longitudinal direction (X direction). More specifically, in the diaper 1, the outer shell 5 includes a single outer sheet 51, which is located on the non-skin surface side and which forms the outer surface of the diaper 1, and a single inner sheet 52, which is located on the skin-side surface and which forms the inner diaper surface 1. Outer sheet 51 and inner sheet 52 are tapered inward in the central part of the longitudinal direction (X direction) and have the same shape and size. A plurality of elastic elements 53 and near-leg elastic elements 55 are disposed between the outer sheet 51 and the inner sheet 52.

The elastic elements 53 of the diaper 1 are described in detail below. As shown in FIG. 2 and 3, the elastic elements 53 include, in each of the regions - the front region A and the rear region B: from five to twenty first elastic elements 531 placed at intervals inward in the longitudinal direction (X direction) from the end edge forming an opening WO for waist, to the part including the end portion of the absorbent block 10 in the longitudinal direction (X direction); and from three to ten second elastic elements 532 placed at intervals inward in the longitudinal direction (X direction) from a position spaced 2 mm to 25 mm inward in the longitudinal direction (X direction) from the first elastic element 531 closest to the transverse center line CL2, to the outer edges forming the corresponding holes LO for the legs. In addition, only in the front region A, the elastic elements 53 of the diaper 1 include from two to six third elastic elements 533 placed at intervals inward in the longitudinal direction (X direction) from a position 3 mm to 8 mm inward in the longitudinal direction (direction X) from the second elastic member 532 closest to the transverse center line CL2 to the transverse center line CL2.

As shown in FIG. 4, the outer shell 5 includes elastic areas ET. The elastic region ET is formed so that: a plurality of elastic elements 53 are spaced apart in the longitudinal direction (X direction); one or more continuous adhesive sections 54 are located between each pair of elastic elements 53, 53 adjacent to each other in the longitudinal direction (X direction); and the outer sheet 51 and the inner sheet 52 are bonded to each other using continuous adhesive sections 54. More specifically, in each of the regions - the front region A and the rear region B - of the diaper 1, the first elastic region T1 and the second elastic region T2 are formed by respectively, of the first elastic elements 531 and the second elastic elements 532 in an extended state along the transverse direction (Y direction) between the outer sheet 51 and the inner sheet 52 forming the outer shell 5. In addition, in the front region A t this elastic region T3 is formed by placing the third elastic elements 533 in an extended state along the transverse direction (Y direction) between the outer sheet 51 and the inner sheet 52 forming the outer shell 5. In the diaper 1, the second elastic region T2 in each region is the front region A and the rear region B - and the third elastic region T3 in the front region A are the above elastic regions ET.

As shown in FIG. 4, in the second elastic region T2, which is the elastic region ET, the second elastic elements 532, placed in an extended state along the transverse direction (Y direction), are spaced apart in the longitudinal direction (X direction) between the outer sheet 51 and the inner sheet 52. Continuous adhesive sections 54 located between each pair of second elastic elements 532, 532 adjacent to each other in the longitudinal direction (X direction) are applied continuously in the form of strips along the transverse direction (Y direction). It is preferred that one to ten, more preferably two to five continuous adhesive sections 54 are located between each pair of second elastic elements 532, 532 adjacent to each other in the longitudinal direction (X direction). It should be noted that in the diaper 1 two continuous adhesive sections 54 are placed between each pair of second elastic elements 532, 532 adjacent to each other in the longitudinal direction (X direction), as shown in FIG. 4. The outer sheet 51 and the inner sheet 52 are partially connected by continuous adhesive sections 54, thereby forming a second elastic region T2 (elastic region ET), the elasticity of which is given by the second elastic elements 532.

As shown in FIG. 4, in the third elastic region T3, which is the elastic region ET, the third elastic elements 533, which are stretched along the transverse direction (Y direction), are spaced apart in the longitudinal direction (X direction) between the outer sheet 51 and the inner sheet 52 Continuous adhesive sections 54 located between each pair of third elastic elements 533, 533 adjacent to each other in the longitudinal direction (X direction) are applied along the transverse direction (Y direction). It is preferred that one, four, more preferably one to three continuous adhesive sections 54 are located between each pair of third elastic elements 533, 533 adjacent to each other in the longitudinal direction (X direction). It should be noted that in the diaper 1 two continuous adhesive sections 54 are placed between each pair of third elastic elements 533, 533 adjacent to each other in the longitudinal direction (X direction), as shown in FIG. 4. The outer sheet 51 and the inner sheet 52 are partially connected by continuous adhesive sections 54, thereby forming a third elastic region T3 (elastic region ET), the elasticity of which is imparted by the third elastic elements 533.

In the second elastic regions T2 and in the third elastic region T3, which are elastic regions ET, from the point of view of establishing a balance between softness and adhesive strength, it is preferable that the interval W1 (cf. FIG. 4) between each pair of continuous adhesive sections 54 , 54 adjacent to each other in the longitudinal direction (X direction), was equal to the length (width W2) (cf. FIG. 4) in the longitudinal direction of each continuous adhesive portion 54.

More specifically, for the same reasons, in the second elastic regions T2 and in the third elastic region T3, which are elastic regions ET, it is preferable that the interval W1 (cf. FIG. 4) between each pair of continuous adhesive sections 54, 54, adjacent to each other in the longitudinal direction (X direction), was preferably from 0.5 mm to 10 mm inclusive, more preferably from 0.7 mm to 5 mm inclusive.

For the same reasons, it is preferable that the length (width W2) (cf. FIG. 4) in the longitudinal direction of each continuous adhesive portion 54 is preferably from 0.5 mm to 10 mm inclusive, more preferably from 0.7 mm to 5 mm inclusive.

It should be noted that in the second elastic regions T2 and in the third elastic region T3, which are elastic regions ET, the interval W3 between each pair of second elastic elements 532, 532 or between each pair of third elastic elements 533, 533 adjacent to each other in the longitudinal direction (X direction) is preferably from 0.5 mm to 10 mm inclusive, more preferably from 0.7 mm to 5 mm inclusive.

Continuous adhesive portions 54 are applied, for example, to the skin-facing surface of the outer sheet 51 or the non-skin-facing surface of the inner sheet 52 using a coating device.

It should be noted that, as shown in FIG. 2-4, in the first elastic region T1, the first elastic elements 531, which are stretched in the lateral direction (Y direction), are spaced apart in the longitudinal direction (X direction) between the outer sheet 51 and the inner sheet 52. In addition, the outer the sheet 51 and the inner sheet 52 are partially bonded to each other by fusion-connected portions 56 of the outer shell, which are spaced apart in the transverse direction (Y direction) between each pair of first elastic elements 531, 531 adjacent to each other with the other in the longitudinal direction (X direction). In the first elastic region T1, in which the outer sheet 51 and the inner sheet 52 are partially bonded to each other, as described above, the elastic elements 531 are stretched along the transverse direction (Y direction) so that they do not intersect the fusion-connected portions 56 of the outer shell. The fusion sections 56 of the outer shell are spaced so that in the longitudinal direction (X direction) they form a row and the plurality of rows of fusion sections, where each row consists of a plurality of fusion sections 56 of the outer shell, is formed at intervals between them in the transverse direction (direction Y).

The fusion-bonded sections 56 of the outer shell are formed by overlaying the outer sheet 51 and the inner sheet 52 and embossing in the corresponding sections. As for the hot stamping device, it is possible to use a device including a profiling shaft and a support shaft, wherein the outer peripheral surface of the profiling shaft is provided with protrusions having a shape corresponding to the fusion-connected portions 56 of the outer shell. Instead of hot stamping, ultrasonic welding or a laser beam can be used as a method of forming fused bonded sections of the outer shell 56.

Furthermore, as shown in FIG. 2-4, in the diaper 1, elastic elements 55 are placed between the outer sheet 51 and the inner sheet 52 in a stretched state along a narrow portion in the central region of the outer sheet 51 and the inner sheet 52. The ring-shaped elastic elements 55 are fixed between the outer sheet 51 and the inner sheet 52 when using a plurality of continuous adhesive sections 54 spaced longitudinally (X-direction).

The outer shell 5 of the diaper 1 is described in more detail below.

As shown in FIG. 3 and 4, the outer shell 5 has a pair of end fastening portions 57, 57 which are located on the respective transverse lateral edge portions 5a1, 5a1 in the front region A and the corresponding transverse lateral edge portions 5b1, 5b1 in the rear region B and which are located where the outer sheet 51 and the inner sheet 52 are fastened with glue located between the outer sheet 51 and the inner sheet 52. In addition, the outer shell 5 has a pair of fixing sections 58, 58 on the side of the absorbent block, which are located closer to the center in the transverse direction lines (Y direction) than the end fastening portions 57 of the front region A, and are located with corresponding overlapping of the corresponding lateral parts of the absorbent block 10, oriented in the longitudinal direction (X direction), in the front region A, and which are located where the outer sheet 51 and the inner sheet 52 are fastened with glue located between the outer sheet 51 and the inner sheet 52. Similarly, the outer shell 5 has a pair of fixing sections 58, 58 on the side of the absorbent block, which are located closer to the center in the transverse direction pressure (Y direction) than the end fastening portions 57 of the rear region B, and are arranged with corresponding overlapping of the corresponding lateral parts of the absorbent block 10 oriented in the longitudinal direction (X direction) in the rear region B, and which are located where the outer sheet 51 and the inner sheet 52 is fastened with glue located between the outer sheet 51 and the inner sheet 52.

Furthermore, as shown in FIG. 2-4, in the front region A and the rear region B, the plurality of first elastic members 531 — of the plurality of first elastic members 531 — are further outward in the longitudinal direction (X direction) than the opposite ends of the absorbent block 10 in the longitudinal direction (X direction) attached to the outer sheet 51 and the inner sheet 52 by a pair of end fixing sections 57, 57. In other areas than the end fixing sections 57, 57, these distant first elastic elements 531 are not attached to the outer sheet 51 and the inner sheet 52. In addition, in the front region A and the rear region B, a plurality of first elastic elements 531 — from a plurality of first elastic elements 531 — which are located in respective longitudinal overlapping portions of the absorbent block 10 in the longitudinal direction (X direction), are attached to the outer sheet 51 and the inner sheet 52 by a pair of end fixing sections 57, 57 and a pair of fixing sections 58, 58 from the side of the absorbent block. In the diaper 1, in the areas between the end fastening portions 57 and the fastening portions 58 on the side of the absorbent block, the first elastic elements 5 31 located on the overlapping portions of the opposite ends of the absorbent block 10 are not attached to the outer sheet 51 and the inner sheet 52. It should be noted that the first elastic elements 531 located on the overlapping portions of the opposite ends of the absorbent block 10 are attached to the outer sheet 51 and the inner sheet 52 with glue in the area between the pair of fasteners sections 58, 58 from the side of the absorbent block.

In addition, as shown in FIG. 2-4, in the front region A and the rear region B, a plurality of second elastic members 532 are attached to the outer sheet 51 and the inner sheet 52 by a pair of end fixing sections 57, 57 and a pair of fixing sections 58, 58 from the side of the absorbent block. In addition, in the diaper 1, a plurality of second elastic elements 532 are attached across the entire width (Y direction) to the outer sheet 51 and the inner sheet 52 by adhesive applied to the surface of each elastic element with a comb spray gun.

In addition, as shown in FIG. 2-4, in the front region A, a plurality of third elastic members 533 are attached to the outer sheet 51 and the inner sheet 52 by a pair of fixing sections 58, 58 from the side of the absorbent block. In addition, in the diaper 1, a plurality of third elastic members 533 are fastened across the entire width (Y direction) to the outer sheet 51 and the inner sheet 52 by adhesive applied to the surface of each elastic member with a comb spray gun.

In the outer shell 5 of the diaper 1, in the overlapping region of the absorbent block 10, the elastic action of the elastic elements 53 is reduced by cutting the elastic elements 53 into small segments by a plurality of cutting sections 59. More specifically, each of the part of the first elastic elements 531 located in the overlapping region of the absorbent block 10, the plurality of second elastic members 532 and the plurality of third elastic members 533 are pressed through the outer sheet 51 by spot heat welding at points corresponding to the plurality of elastic uschih portions 59, and thereby cut, thereby the elastic action of these elastic elements is reduced. Thus, the cutting sections 59 are formed by cutting the elastic elements 53 by applying heat during hot stamping. Instead of hot stamping, a laser beam, for example, can be used as a method of forming cutting sections 59.

The relationship between the interval W1 (compare with FIG. 4) between each pair of continuous adhesive sections 54, 54 adjacent to each other in the longitudinal direction (X direction) and the length L1 in the longitudinal direction of each cutting section 59 has no particular limitations, however , from the point of view of preventing the crushed elastic elements 53 from falling through the openings of the cutting sections 59, it is preferable that the interval W1 between each pair of adjacent continuous adhesive sections 54, 54 be less than the length L1 in the longitudinal direction of each cutting its portion 59. In the same point of view it is preferable that the length L1 in the longitudinal direction of each of the cutting portion 59 is preferably from 1 mm to 15 mm inclusive, more preferably, from 1.5 mm to 10 mm inclusive.

As indicated above, the elastic effect of the second elastic elements 532 and the third elastic elements 533 is reduced by cutting these elastic elements into small segments in the overlapping region of the absorbent block 10. Thus, the second elastic region T2 and the third elastic region T3, which are elastic regions ET are formed further outward in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction (X direction). More specifically, as shown in FIG. 4, in the diaper 1, most of the first elastic region T1 is formed so that it has elasticity in the region between the pair of end fastening portions 57, 57. On the other hand, the remaining part of the first elastic region T1, as well as the second elastic region T2 and the third elastic region T3 have elasticity in areas farther in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction (X direction), however, are less likely to have elasticity in the overlap portion of the absorbent block 10, an elastic region is thus formed divided into left and right sides of the diaper 1.

The following describes the materials for the manufacture of various parts of the diaper 1.

As for the top sheet 2, the bottom sheet 3, the absorbent element 4, the side cuffs 6, etc., forming the absorbent block 10, it is possible to use various materials commonly used in absorbent articles, such as disposable diapers, without specific restrictions. For example, for the manufacture of the top sheet 2, for example, a single layer or multilayer nonwoven fabric or a porous film can be used. For the manufacture of the bottom sheet 3 can be used, for example, a moisture-permeable polymer film. For the manufacture of the absorbent element 4, an element can be used in which the absorbent base formed by the fibrous material and particles of the absorbent polymer is coated with thin paper. For the manufacture of side cuffs 6, for example, a water-repellent single-layer or multi-layer non-woven fabric can be used.

For the manufacture of the outer sheet 51 and the inner sheet 52 forming the outer shell 5, for example, a single-layer non-woven fabric or a laminated non-woven fabric, including two or more layers, including, for example, a non-woven fabric of a spunbond production method, a breathable non-woven fabric, can be used. , hot rolled non-woven fabric, woven fiber non-woven fabric and aerodynamic production non-woven fabric. Note that various sheet materials can be used to make the outer sheet 51 and the inner sheet 52.

For the manufacture of elastic elements (forming the sealing sleeve of the elastic elements 61, elastic elements 53, etc.), for example, synthetic rubber such as styrene-butadiene, butadiene, isoprene or neoprene, natural rubber, EVA (ethylene vinyl acetate) can be used. - ethylene vinyl acetate), flexible polyolefins, polyurethane, etc. Regarding the shape of the elastic elements, it can be used, preferably: threadlike elements (rubber threads, etc.), for example, with a rectangular, square, round, oval or polygonal cross-sectional shape; tape elements (flat rubber tapes, etc.); or multi-fiber threads. In particular, for the manufacture of elastic elements 53, it is preferable to use rubber threads from the point of view of reducing the proportion of elastic elements, increasing softness and improving the appearance and from the point of view of expanding unconnected sections in the area connected by continuous adhesive sections and consisting of unconnected sections and connected sections .

As for the adhesive for creating continuous adhesive portions 54, the adhesive for creating the end fastening portions 57 and the fastening portions 58 on the side of the absorbent block for fixing various elements, and adhesive for bonding the outer shell 5 and the absorbent block 10, etc. with each other, various hot-melt adhesives, etc., commonly used in absorbent products, such as disposable diapers, can be used without specific restrictions.

The side seams S are formed after creating fused bonded sections 56 of the outer shell by applying end fixing sections 57 from the front region A and end fixing sections 57 from the rear region B and hot stamping is performed on these sections. Instead of hot stamping, ultrasonic welding or a laser beam can be used as a method of creating side seams S.

The following describes the effects of using the above diaper 1.

As shown in FIG. 4, in the front region A, the outer shell 5 of the diaper 1 includes elastic regions ET (the second elastic region T2 and the third elastic region T3), in which: the second elastic elements 532 and the third elastic elements 533 are spaced apart in the longitudinal direction (X direction); one or more continuous adhesive sections 54 are located between each pair of second elastic elements 532, 532 and - each pair of third elastic elements 533, 533 adjacent to each other in the longitudinal direction (X direction); and the outer sheet 51 and the inner sheet 52 are fastened by continuous glue portions 54. In addition, in the rear region B, the outer shell 5 of the diaper 1 includes an elastic region ET (second elastic region T2), in which: the second elastic elements 532 are spaced apart in the longitudinal direction (X direction); one or more continuous adhesive sections 54 are located between each pair of second elastic elements 532, 532 adjacent to each other in the longitudinal direction (X direction); and the outer sheet 51 and the inner sheet 52 are fastened by continuous adhesive sections 54. In accordance with the relative position of the elastic elements 53 and the continuous adhesive sections 54 included in the outer shell 5, the outer sheet 51 and the inner sheet 52 are fastened by a plurality of continuous adhesive sections 54 between, for example, with each pair of second elastic elements 532, 532 adjacent to each other in the longitudinal direction (X direction), and thus a plurality of bends 51f, 52f extending continuously along the second elastic elements 532 are easily is formed between each pair of continuous adhesive sections 54, 54 adjacent to each other in the longitudinal direction (X direction), as shown in FIG. 5. More specifically, the compression of the elastic elements 53, which are placed in an extended state in the transverse direction (Y direction) between the outer sheet 51 and the inner sheet 52, causes the outer sheet 51 and the inner sheet 52 to deform, so that they protrude outward in the thickness direction between each pair of continuous adhesive sections 54, 54 adjacent to each other in the longitudinal direction (X direction), which are between, for example, each pair of second elastic elements 532, 532 adjacent to each other in the longitudinal direction (e.g. lenii X). Thus, bends 51f, 52f formed by the outer sheet 51 or the inner sheet 52 occur between each pair of continuous adhesive sections 54, 54 adjacent to each other in the longitudinal direction (X direction), and cavities 50 are formed between the sheets 51, 52, surrounded by vapor bends 51f, 52f. The same is true for the third elastic elements 533, 533. Thus, the softness of the outer shell 5 can be further enhanced, as well as the appearance is improved. In addition, the outer shell 5 is improved in terms of breathability and a pleasant feel to the touch.

In addition, as shown in FIG. 3 and 4, in the first elastic region T1 of the outer shell 5 of the diaper 1, a plurality of the first elastic elements 531 are stretched in the transverse direction (Y direction) so that they do not intersect the fusion-connected portions 56 of the outer shell and both ends of each first elastic an element 531 placed in a stretched state is fixed between the outer sheet 51 and the inner sheet 52. Thus, as shown in FIG. 6, the outer sheet 51 and the inner sheet 52 form a plurality of bends 51f1, 52f1 protruding continuously along the longitudinal direction (X direction) that span the plurality of elastic elements 531. More specifically, in the first elastic region T1 of the diaper 1, as shown in FIG. 6, compression of the first elastic elements 531 — which are placed in a stretched state along the transverse direction (Y direction) between the outer sheet 51 and the inner sheet 52 — causes the outer sheet 51 and the inner sheet 52 to deform, so that they protrude outward in the thickness direction between each a pair of rows of fusion-connected sections adjacent to each other in the transverse direction (Y direction), each of which consists of a plurality of fusion-connected sections 56 arranged in a row along the longitudinal direction (e.g. detecting X). Thus, bends 51f1, 52f1 formed by the outer sheet 51 or inner sheet 52 occur between each pair of rows of fusion-connected portions adjacent to each other in the transverse direction (Y direction), and cavities 50A surrounded by sheets arise between sheets 51, 52 bend 51f1 and bend 52f1. The cavities 50A are formed so that they protrude continuously along the longitudinal direction (X direction) and span a plurality of elastic elements 531 that are placed in a stretched state along the transverse direction (Y direction). Thus, the air permeability of the outer shell 5 is improved, and the appearance can also be improved.

Furthermore, as shown in FIG. 3 and 4, in the outer shell 5 of the diaper 1, the second elastic elements 532 and the third elastic elements 533 are cut into small pieces in the overlapping region of the absorbent block 10, their elastic effect is reduced. Thus, the second elastic region T2 and the third elastic region T3, which are elastic regions ET, are formed further outward in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction (X direction). Since the second elastic region T2 and the third elastic region T3 are formed further outward in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction (X direction), the fit around the buttocks and legs is improved, and a pleasant sensation is easily created to the touch.

In addition, in the outer shell 5 of the diaper 1, the outer sheet 51 and the inner sheet 52 are fixed by a plurality of continuous adhesive sections 54 between each pair of second elastic elements 532, 532 and each pair of third elastic elements 533, 533 adjacent to each other in the longitudinal direction (direction X) thus, a plurality of bends 51f, 52f easily emerge, protruding continuously along the second elastic elements 532 and the third elastic elements 533, between each pair of continuous adhesive sections 54, 54 adjacent to each other longitudinally direction (direction X) (Wed FIG. 5). In addition, in the diaper 1, in the elastic regions (the second elastic region T2 and the third elastic region T3), the outer sheet 51 and the inner sheet 52 are additionally bonded to each other by adhesive applied to the surface of each elastic element 53. With additional fixation of the outer sheet 51 and the inner sheet 52 by means of glue applied to the surface of each second elastic element 532, as described above, bends protruding continuously along the second elastic elements 532 are also easily formed between each pair consisting of and the second elastic element 532 and the continuous adhesive portion 54 adjacent to this second elastic element 532. The same is true for the case of applying glue to the surface of every third elastic element 533. With this structure, the softness of the outer shell 5 is further increased, and can also be improved appearance.

In order to provide the above effects with greater reliability, it is preferable to take into account the following features.

It is preferable that the orientation direction of the fibers constituting at least one of the sheets — the outer sheet 51 and the inner sheet 52 — coincide with the direction along which the continuous adhesive sections 54 are located. More specifically, in the diaper 1, the continuous adhesive sections 54 are oriented along the transverse direction (Y direction), which is the direction along which continuous adhesive portions are applied, and the orientation direction of the fibers — along which the fibers are located, comprising at least dynes of sheets - the outer sheet 51 and inner sheet 52 - coincides with the transverse direction (Y direction). Thus, the compression of the elastic elements 53 causes deformation of the outer sheet 51 and the inner sheet 52 so that they protrude outward in the thickness direction between each pair of continuous adhesive sections 54, 54 adjacent to each other in the longitudinal direction (X direction). Bends 51f, 52f (cf. FIG. 5) formed by the outer sheet 51 or the inner sheet 52 easily arise between each pair of continuous adhesive sections 54, 54 adjacent to each other in the longitudinal direction (X direction), and between the sheets 51 52, cavities 50 are formed surrounded by vapor of bends 51f, 52f. Thus, the softness of the outer shell 5 can be further enhanced, as well as the appearance improved.

The present utility model (first utility model) has been described above in accordance with a preferred embodiment, however, the present utility model (first utility model) is not limited to the described embodiment and can be modified accordingly.

For example, said disposable diaper 1 is a pull-on disposable diaper in which the outer shell 5 has a continuous hourglass-like shape extending from the front region A through the crotch region C to the rear region B, as shown in FIG. 2 and 3. However, the utility model can be applied to a pull-on disposable diaper of a separate type, in which the outer shell 5 is divided into separate elements, that is, the front outer shell, the rear outer shell and the crotch outer shell.

Alternatively, the utility model can be applied to an open-type disposable diaper in which: the outer shell 5 has a continuous hourglass-like shape extended from the front region A, through the crotch region C to the rear region B; a pair of fixing tapes is provided on the transverse lateral edges of the rear region B; the receiving tape for attaching the fastening tapes is on the surface of the front region A not facing the skin. In addition, the utility model may relate to an open type disposable diaper, in which: the outer shell 5 has a continuous rectangular shape extended from the front region A through the crotch region C to back region B; lateral panels extending outward in the transverse direction are attached to the transverse lateral edges of the rear region B; a mounting tape is attached to each outer side of the side panel in the transverse direction. In such open-type disposable diapers, the outer shell 5 is made by: creating an outer sheet 51, which forms the outer shell 5, from a non-woven fabric; creating an inner sheet 52, which forms the outer shell 5, from a moisture-permeable polymer film; placing elastic elements 53 and continuous adhesive sections 54 between the non-woven fabric and the polymer film.

In addition, in the above-described disposable diaper 1, the elastic regions ET are created in the second elastic region T2 and the third elastic region T3, and are created in regions farther outward in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction direction (X direction) as shown in FIG. 3 and 4. However, the arrangement of the elastic regions is not limited to this; they may be located in other regions.

In addition, in the above-described disposable diaper 1, two continuous adhesive sections 54 are provided between each pair of second elastic elements 532, 532 adjacent to each other in the longitudinal direction (X direction), and two continuous adhesive sections 54 are provided between each pair of third elastic elements 533, 533 adjacent to each other in the longitudinal direction (X direction), as shown in FIG. 4. These continuous adhesive sections do not have to be evenly distributed, it is only necessary that between the elastic elements there is one or more continuous adhesive sections.

In addition, in the above-described disposable diaper 1, the elastic elements 53 are cut into small segments by a plurality of cutting sections 59 in the overlapping region of the absorbent block 10, as shown in FIG. 3. However, the elastic elements do not have to be cut.

In addition, in the above-described disposable diaper 1, glue is applied using a comb sprayer to the surface of the second elastic elements 532 or to the surface of the third elastic elements 533, however, the application of this adhesive is not necessary.

In addition, depending on the relationship between the pitch between the elastic elements and the pitch between the continuous adhesive sections, the elastic elements and the continuous adhesive sections may partially overlap.

Next, the present utility model (second utility model) is described in accordance with a preferred embodiment with reference to the drawings. As shown in FIG. 7-10, a pull-on disposable diaper 1A (hereinafter also referred to as “diaper 1A”), corresponding to the first embodiment of the present utility model (second utility model), is a diaper including: an absorbent block 10 elongated in the longitudinal direction, which includes a permeable to liquid top sheet 2, moderately permeable to liquid bottom sheet 3 and an absorbent element 4 located between the top sheet 2 and the bottom sheet 3; and the outer shell 5, located on the side of the surface of the absorbent block not facing the skin 10. More specifically, in a top view in the unfolded and flattened state plane, the outer shell 5 of the diaper 1A is divided into: the front region A located in front of the user when the diaper is on he is wearing; the back area B, located behind the user when the diaper is put on; and the crotch region C located between the front region A and the rear region B. The diaper 1A is a so-called stretchable disposable diaper equipped with a pair of side seams S, S and a pair of leg openings LO, LO formed by connecting the transverse side edge sections 5a1, 5a1 of the outer shell 5 in the front region A with corresponding transverse lateral edge portions 5b1, 5b1 of the outer shell 5 in the rear region B.

As used herein, the term “skin-facing surface” means the surface of the diaper 1A or its component parts (for example, the absorbent block 10) that faces the skin of the wearer when the diaper is put on. The term “non-skin-facing” means the surface of the diaper 1A or its components, which is turned to the side (to the clothes), the opposite of the skin of the user when the diaper is worn on it. In the diaper 1A, the longitudinal direction (X direction) corresponds to the direction along the long side of the diaper 1A or the elongated absorbent block 10, which is an integral part thereof. The transverse direction (Y direction) corresponds to the width direction of the disposable diaper or absorbent block 10, which is an integral part thereof.

The diaper 1A is made symmetrical with respect to the longitudinal center line CL1 oriented in the longitudinal direction (X direction). It should be noted that “CL2” in FIG. 8 and 10 is a transverse center line oriented in the transverse direction (Y direction), which divides the diaper 1A in two and is perpendicular to the longitudinal center line CL1.

The state when said diaper 1A is deployed and flattened corresponds to a state in which the side seams S are separated so that the diaper 1A can be expanded (expanded) and the elastic elements in different parts of the expanded diaper 1A are stretched so that the diaper is deployed to its design size (the size of the diaper extended on the plane in a state where the influence of elastic elements is completely excluded), as shown in FIG. 8 and 10.

As shown in FIG. 8, the absorbent block 10 has an elongated shape, wherein one of its dimensions (in the longitudinal direction (X direction)) is relatively large. The absorbent block 10 includes: a liquid permeable topsheet 2, which forms a surface facing the skin; moderately permeable to liquid (including water-repellent) bottom sheet 3, which forms a surface not facing the skin; a liquid retaining absorbent member 4 located between the upper sheet 2 and the lower sheet 3. As shown in FIG. 8, the side cuffs 6, 6, each of which includes an elastic element placed in a stretched state in the longitudinal direction (X direction), are located on the respective lateral sides of the absorbent block 10, which are oriented in the longitudinal direction (X direction). More specifically, each side cuff 6 is made of liquid impermeable / water-repellent and breathable material and includes an elastic element 61 forming a sealing cuff located near the free end of the side cuff while being stretched in the longitudinal direction (X direction). When the diaper is worn, the compression of the elastic elements 61 forming the sealing cuff causes the free ends of the corresponding side cuffs 6 to rise, thereby forming sealing cuffs that prevent the body fluids from flowing out in the transverse direction (Y direction).

As shown in FIG. 9, in the diaper 1A, the absorbent member 4 includes an absorbent base 40 including a water absorbent polymer and a base wrap sheet 45 that covers the absorbent base 40. The base wrap sheet 45 covers the upper and lower surfaces (surface facing the skin and the surface not facing the skin) ) of the absorbent base 40. In addition, the absorbent base 40 includes a fiber-free portion in which the amount of material forming the absorbent base (ie, the base material) is small.

In a plan view, in a state where the diaper 1A is deployed and flattened, the fiber-free portion is oriented in the longitudinal direction (X direction) of the diaper 1A. More specifically, as shown in FIG. 8 and 9, the absorbent base 40 of the diaper 1A includes: a portion 41 with a large bulk, centered in the transverse direction (Y direction) in the crotch region; and sections 42 with a low bulk, located on both sides of the portion 41 with a large bulk and having a lower bulk than the portion 41 with a large bulk. The large bulk portion 41 is elongated along the longitudinal center line CL1 of the diaper 1A. As shown in FIG. 8, the absorbent base 40 of the diaper 1A includes: an upper absorbent layer 411 having, in a plan view, substantially the shape of the letter T, with the side facing the front region A wider than the rear region B; and a rectangular lower absorption layer 412 having a larger dimension in the longitudinal direction (X direction) and in the transverse direction (Y direction) than the upper absorption layer 411. The portion in which the upper absorption layer 411 is superimposed on the lower absorption layer 412 forms a portion 41 with a large bulk, areas where the upper absorbent layer 411 is not superimposed on the lower absorbent layer 412 are portions 42 with a small bulk. The upper absorbent layer 411 is located so that it extends from the crotch region C to the front region A of the diaper 1A, the width of the upper absorbent layer 411, as well as the portion 41 with a large bulk, gradually increases from the center in the transverse direction (Y direction) of the crotch region C to front region A. The lower absorbent layer 412 covers the crotch region C and extends to the front region A and the rear region B.

As shown in FIG. 8 and 9, the fiber-free portion of the absorbent base 40 includes a central fiber-free portion 43 located centrally in the transverse direction (Y direction) of the crotch region C. The central fiber-free portion 43 is formed to be longitudinally extended (X direction). More specifically, the central fiber-free portion 43 of the absorbent base 40 has a lower bulk than the large bulk portion 41 and the low bulk portion 42 of the diaper 1A. In the diaper 1A, in addition to the central non-fiber-lined portion 43, elongated in the longitudinal direction (X direction) and centrally in the transverse direction (Y-direction) of the large bulk portion 41, the non-fiber-lined portion of the absorbent substrate 40 includes lateral non-lined fibers sections 44, 44 located in the respective sections 42, 42 with a low bulk. Each lateral fiber-free portion 44 is formed in a portion that is located: between the transverse lateral edge of the upper absorbent layer 411 (portion 41 with a large bulk) oriented in the longitudinal direction (X direction) and the transverse lateral edge of the lower absorbent layer 412 (portion 42 with a low bulk) oriented in the longitudinal direction (X direction); and closer to the upper absorbent layer 411 (section 41 with a large bulk). In addition, the lateral fiber-free sections 44 are oriented in the longitudinal direction (X direction) along the corresponding lateral edges of the upper absorbent layer 411 (portion 41 with a large bulk).

As described above, the central fiber-free portion 43 and the pair of lateral fiber-free portions 44, 44 of the absorbent base 40 have a lower bulk than the large bulk portion 41 and the low bulk portion 42, and in this diaper 1A, through holes in which there is absolutely no material forming an absorbent base (no base material). However, even if there is a small amount (about 20 g / m ² ) of the base material that is less than the amount corresponding to the low-mass portion 42, such portions are also considered as non-fiber-spaced portions, since the same effect is possible.

As shown in FIG. 8 and 9, in the diaper 1A, the central fiber-free portion 43 is a rectangular through hole elongated in the longitudinal direction (X direction), which extends both through the upper absorbent layer 411 and through the lower absorbent layer 412. A through hole passing through and through the upper absorption layer 411, and through the lower absorption layer 412, can be formed, for example, by first manufacturing the upper absorption layer 411 and the lower absorption layer 412 so that each of them has a through hole, , Then laminating these two absorbent layers so that the through holes in the respective layers coincide. Alternatively, the upper absorbent layer 411 and the lower absorbent layer 412 can be initially made without a through hole, and then a through hole can be made in each layer, after which these two absorbent layers can be superimposed so that the through holes in corresponding layers coincided. Instead, the upper absorbent layer 411 and the lower absorbent layer 412 can be initially made without a through hole, then superimposed, after which a through hole can be made passing through both layers at once.

Regarding the central fiber-free portion 43 and the pair of lateral fiber-free portions 44, 44 of the diaper 1A, as shown in FIG. 8, from the front region A side in the longitudinal direction (X direction) of the absorbent base 40, the end portion 43 a of the central non-fiber spaced portion 43 is located closer to the side of the front region A than the end portions 44 a, 44 a of the corresponding side non-fiber spaced portions 44; whereas from the side of the rear region B in the longitudinal direction (X direction) of the absorbent base 40, the end portions 44b, 44b of the respective lateral fiber-spaced portions 44 are closer to the side of the rear region B than the end portion 43b of the central non-fiber spaced portion 43. Note that in the diaper 1A, the end portion 43a of the central fiber-free portion 43 does not reach the position corresponding to the side seams S, as shown in FIG. 8.

The absorbent block 10, including the absorbent element 4 with the indicated structure, is glued to the central part of the outer shell 5 so that the longitudinal direction (X direction) of the absorbent block corresponds to the longitudinal direction (X direction) of the diaper 1A in the state when it is deployed and straightened the plane. In the direction of the thickness of the pull-on disposable diaper 1A, the outer shell 5 is fixed and fixed by placing it on the side not facing the skin of the surface of the bottom sheet 3 forming the absorbent block 10.

As shown in FIG. 10, the outer shell 5 includes an outer sheet 51 located on the side of the non-skin surface that forms the outer surface of the diaper 1A, and an inner sheet 52 located on the side of the skin-facing surface, and also includes those located between the outer sheet 51 and the inner sheet 52: a plurality of near-leg elastic elements 55 placed in a stretched state in a curved shape along each leg hole LO, LO; and a plurality of near-foot adhesive sections 7 for fixing the near-foot elastic elements 55. More specifically, in the diaper 1A, the outer shell 5 includes a single outer sheet 51 located on the non-skin surface that forms the outer surface of the diaper 1A and a single inner sheet 52 located on the side of the skin facing surface that forms the inner surface of the diaper 1A. The outer sheet 51 and the inner sheet 52 are narrowed inwardly in the central part of the longitudinal direction (X direction) and have the same shape and size. A plurality of elastic elements 53 and near-leg elastic elements 55 are disposed between the outer sheet 51 and the inner sheet 52.

The elastic elements 55 of the diaper 1A are described in detail below. As shown in FIG. 8-10, the fenestrated elastic elements 55 are stretched between the outer sheet 51 and the inner sheet 52 along a narrow portion in the central region of the outer sheet 51 and the inner sheet 52. The fenestrated elastic elements 55 of the diaper 1A include: a plurality of front fenestrated elastic elements 551 arranged in a stretched state, from one LO hole for the legs (in the first embodiment of the utility model — the hole in FIG. 10 on the left) from the front region A to another LO hole for the legs (in the first embodiment those of utility model - holes located right in Figure 10) from the front of the area A through the crotch region C. and a plurality of posterior near-leg elastic elements 552 placed in a stretched state from one hole LO for the legs (in the first embodiment; the implementation of the utility model is the hole located in Fig. 10 on the left) from the back region B to another hole LO for the legs (in the first an embodiment of the utility model - the hole located in Fig. 10 on the right) from the back region B through the crotch region C. The front parietal elastic elements 5 51 and the rear parietal elastic elements 552 are cut in the center in the transverse n in the direction (Y direction) (in the area including the longitudinal centerline CL) of the crotch region C. In front, one to ten (three in the diaper 1A of the first embodiment of the utility model) of the front perineal elastic elements 551 are placed at intervals along the narrow part of the holes LO for legs, from one to ten behind (three in the diaper 1A of the first embodiment of the utility model) of the rear pericarp elastic elements 552 placed at intervals along the narrow portion of the leg openings LO, the front and rear perineal e okolonozhnymi elastic members are fixed with adhesive portions 7.

After cutting the anterior parietal elastic elements 551 from the front region A of one of the leg openings LO (narrow parts) (the hole located in Fig. 10 on the left), the anterior parietal elastic elements 551 are arranged in a curved shape with a bulge towards the front region A and with a bulge towards the rear region B so that there is an inflection point 5P1 between the bulges, as shown in FIG. 10 and 11. Upon compression of the anterior parietal elastic elements 551, an assembled portion 51a is formed along the leg hole LO (narrow part) and a assembled expansion portion 51b extending from the assembled portion 51a to the longitudinal center line CL1. In the same way, from the front region of the other leg hole LO (narrow part) (the hole located on the right in FIG. 10), the front parietal elastic elements 551 are curved, with a bulge towards the front region A and a bulge towards the back region B so that between the bulges there is an inflection point 5P1. When the front parietal elastic elements 551 are compressed, an assembled portion 51a is formed along the leg hole LO (narrow portion) and a assembled expansion portion 51b extending from the assembled portion 51a to the longitudinal center line CL1. In this case, the inflection point 5P1 means the boundary point where the shape convex towards the front region A changes to the shape convex towards the rear region B with respect to one central front parietal elastic element 551 from the plurality of front parietal elastic elements 551 in the form top in a state where the diaper 1A is deployed and flattened. Note that if the number of anterior paranormal elastic elements is even, then the inflection point is found by virtual image of the virtual anterior parietal elastic element having a path passing in the middle between two central anterior parietal elastic elements 551, 551, and using this virtual anterior parietal elastic element in as a guide.

In addition, as in the case of the front parietal elastic elements 551, after cutting the posterior parietal elastic elements 552 from the rear region B of one of the LO holes for the legs (narrow parts) (the hole located on the left in Fig. 10), the rear parietal elastic elements 552 are arranged in a curved shape, with a bulge towards the rear region B and with a bulge towards the front region A so that there is an inflection point 5P2 between the bulges, as shown in FIG. 10. Upon compression of the posterior parietal elastic elements 552, an assembled portion 52a is formed along the leg hole LO (narrow portion) and a assembled expansion portion 52b extending from the assembled portion 52a to the longitudinal center line CL1. Likewise, from the back region B of the other leg opening LO (narrow part) (the opening located on the right in FIG. 10), the rear parietal elastic elements 552 are arranged in a curved shape with a bulge towards the back region B and with a bulge towards the front region A so that between the bulges there is an inflection point 5P2. Compression of the posterior parietal elastic elements 552 results in an assembled portion 52a located along the leg hole LO (narrow portion) and a assembled expansion portion 52b extending from the assembled portion 52a to the longitudinal center line CL1. As in the case of the inflection point 5P1, the inflection point 5P2 means the boundary point where the shape convex towards the rear region B changes to the shape convex towards the front region A with respect to one central rear posterior parietal elastic element 552 of the plurality of anterior parietal elastic elements 552 in a plan view in a state where the diaper 1A is deployed and flattened. We note that, as in the case when there is an even number of the indicated anterior parietal elastic elements 551, if the number of the posterior parietal elastic elements 552 is even, the inflection point is found by means of a virtual image of a virtual posterior parietal elastic element having a path passing in the middle between two the central posterior parietal elastic elements 552, 552, and the use of this virtual posterior parietal elastic element as a guide.

In the diaper 1A, the parietal elastic region (parietal folds) has a shape in which: an assembled portion 51a from the front region A and an assembled portion 52a from the rear region B located along one of the leg openings LO (narrow parts) (i.e. The holes located on the left in Fig. 10 are closed annularly along the edge of the leg hole LO; and the assembled expansion portions 51b, 52b extend, respectively, from the assembled portion 51a and the assembled portion 52a to the longitudinal center line CL1. Similarly, in the diaper 1A, the parietal elastic region (parietal folds) has a shape in which: an assembled portion 51a from the front region A and an assembled portion 52a from the rear region B, located along another leg hole LO (narrow part) ( that is, the holes located on the right in Fig. 10) are closed annularly along the edge of the leg hole LO; and the assembled expansion portions 51b, 52b extend, respectively, from the assembled portion 51a and the assembled portion 52a to the longitudinal center line CL1.

As shown in FIG. 10 and 11, in a plan view, in a state where the diaper 1A is deployed and flattened, a plurality of leg-shaped adhesive sections 7 for securing the near-leg elastic elements 55 oriented in the transverse direction (Y direction) are placed in the longitudinal direction (X direction ) in the LT region where there are a plurality of semicircular elastic elements 55. More specifically, the parietal adhesive sections 7 are arranged in the transverse direction (Y direction) parallel to each other over the entire width of the diaper 1A, the parietal to eevye portions 7 are applied in the form of strips. In addition, a plurality of circumflex adhesive sections 7 are arranged such that there are two or more different intervals representing the intervals between the respective pairs of circumflex adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction). The intervals between the respective pairs of near-posterior adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) are described in more detail below.

The interval between each pair of near-foot adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction), from the set of near-foot adhesive sections 7 located near those sections where the curvature (1 / radius of curvature) of the near-leg elastic elements 55 is large, less than the interval between each pair of glue sections 7, 7 adjacent to each other in the longitudinal direction (X direction), from the set of glue sections 7 located near those sections where the curvature (1 / radius of curvature) There are 55 small elements. In this case, “areas where the curvature (1 / radius of curvature) of the parietal elastic elements 55 (of the anterior parietal elastic elements 551 and the posterior parietal elastic elements 552) is large” include: an area where the anterior parietal elastic elements 551 are curved toward the side seams S and reach the side seams S (the area where the front parietal elastic elements 551 are superimposed on the side seams S); an area where the rear parietal elastic elements 552 are bent toward the side seams S and extend to the side seams S (an area where the rear parietal elastic elements 552 are superimposed on the side seams S); and the area where the front near-foot elastic elements intersect with the rear near-foot elastic elements 552. On the other hand, “the portions where the curvature (1 / radius of curvature) of the near-foot elastic elements 55 (the front near-foot elastic elements 551 and the rear near-foot elastic elements 552) is small "Include: the area between the specified area where the front parietal elastic elements 551 are superimposed on the side seams S, and the specified area where the front parietal elastic elements 551 intersect with the rear parietal GOVERNMENTAL elastic elements 552, in terms of the front okolonozhnyh elastic members 551; and a region between the indicated region where the rear parietal elastic elements 552 are superimposed on the side seams S and the specified region where the rear parietal elastic elements 552 intersect with the front parietal elastic elements 552, from the point of view of the rear parietal elastic elements 552.

It is preferable that in areas where the curvature (1 / radius of curvature) of the perineal elastic elements 55 is large, that is, in the area where the front perineal elastic elements 551 are superimposed on the side seams S, in the area where the rear perineal elastic elements 552 are superimposed on the side seams S, and in the area where the anterior parietal elastic elements 551 intersect with the posterior parietal elastic elements 552 - the radius of curvature was approximately 10 mm to 150 mm inclusive.

In the area where the paranormal elastic elements 55 (the front parietal elastic elements 551 and the posterior parietal elastic elements 552) are overlapped on the side seams S, the interval Dmin between each pair of parietal adhesive sections adjacent to each other in the longitudinal direction (X direction) is smaller than the DL interval between each pair of near-leg elastic elements 55, 55 adjacent to each other in the longitudinal direction (X direction), as shown in FIG. 11. In addition, in the diaper 1A, the interval Dmin between adjacent parietal adhesive portions is the smallest of the intervals between the corresponding pairs of parietal adhesive portions adjacent to each other in the longitudinal direction (X direction). From the point of view of reliable fixation of areas where the curvature of the near-knife elastic elements 55 is large, the ratio (Dmin / DL) of the Drain interval between each pair of adjacent near-leg adhesive sections to the DL interval between each pair of near-leg elastic elements 55, 55 adjacent to each other in the longitudinal direction (X direction) is preferably from 0.05 to 0.5 inclusive, more preferably from 0.1 to 0.3 inclusive. More specifically, from the same point of view, the interval Dmin between adjacent parietal adhesive sections is preferably from 0.5 mm to 5 mm inclusive, more preferably from 1 mm to 3 mm inclusive.

The following describes in more detail the smallest interval Dmin between adjacent glue sections of the diaper 1A. As shown in FIG. 11, in the region where the front parietal elastic elements 551 are superimposed on the side seams S, the seven parietal adhesive sections 7 form six intervals Dmin. In addition, as shown in FIG. 11, in: areas where the anterior parietal elastic elements 551 intersect, with the posterior parietal elastic elements 552, five parietal adhesive sections 7 form four Dmin intervals. In addition, as shown in FIG. 10, in the region where the posterior parietal elastic elements 552 are superimposed on the side seams S, the six parietal adhesive sections 7 form five intervals Dmin.

Preferably, the largest interval Dmax — of the various intervals between the pairs of parietal adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) —is either: in the area within the LTa region where the plurality of front parietal elastic elements 551 are located, which includes the inflection point 5P1 of the anterior perineal elastic elements 551; or in the region within the LTb region where there are a plurality of posterior perineal elastic elements 552 that includes an inflection point 5P2 of the posterior parietal elastic elements 552. In the diaper 1A, the interval Dmax is located in the region that includes the inflection point 5P2 of the posterior parietal elastic elements 552 as shown in FIG. 10. It should be noted that the region including the inflection point 5P1 and the region including the inflection point 5P2 correspond to the areas where the curvature (1 / radius of curvature) of the perineal elastic elements 55 (the front perineal elastic elements 551 and the rear perineal elastic elements 552) is small .

The following describes in more detail the largest interval Dmax between the parietal adhesive sections of the diaper 1A. As shown in FIG. 10, in the region that includes the inflection point 5P2 of the posterior parietal elastic elements 552, the four parietal adhesive sections 7 form three Dmax intervals.

In addition, in the diaper 1A, as shown in FIG. 10, the largest interval Dmax — of the various intervals between the pairs of near-glue adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) —is located in the region in the longitudinal direction (X direction) where the non-fiber-laid portion is located. More specifically, the largest Dmax interval in the diaper 1A is located so that it intersects with the region in which the non-fiber-spaced portions are located (including the central non-fiber-spanned portion 43 and a pair of lateral non-fiber-spanned portions 44, 44). Preferably, the largest interval Dmax in the diaper 1A is positioned so that it intersects with at least one non-fiber spaced portion from the central non-fiber spanned portion 43 and a pair of lateral non-fiber spaced portions 44, 44, more preferably, the Dmax spaced that it intersects with all sections — the central section 43 not laid with fibers and a pair of side sections 44, 44 not laid with fibers.

In addition, in the diaper 1A, as shown in FIG. 10, the largest interval Dmax — of the various intervals between the pairs of parietal adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) —is located in the region including the transverse center line CL2. More specifically, from the point of view of reducing the amount of glue applied, increasing softness and improving texture, the largest interval Dmax between adjacent glue sections is preferably from 0.5 mm to 50 mm inclusive, more preferably from 1 mm. up to 30 mm inclusive. It should be noted that in the diaper 1A, the region including the transverse center line CL2 corresponds to the region where the curvature (1 / radius of curvature) of the paranoid elastic elements 55 (of the anterior parietal elastic elements 551 and the posterior parietal elastic elements 552) is small.

In the diaper 1A, the parietal glue portions 7 include: a plurality of parietal glue portions 7 forming the aforementioned largest interval Dmax, as shown in FIG. 10; a plurality of perineal adhesive sections 7 forming the aforementioned smallest interval Dmin, as shown in FIG. eleven; and a plurality of near-foot glue portions 7 forming the interval Dmid between the largest interval Dmax and the smallest interval Dmin, as shown in FIG. 10. Thus, in the diaper 1A, a plurality of bent glue sections 7 are arranged such that there are three different intervals that are intervals between respective pairs of bent glue sections 7, 7 adjacent to each other in the longitudinal direction (X direction). From the point of view of reducing the amount of adhesive applied, increasing softness and improving texture, the Dmid interval between adjacent glue sections is preferably from 0.5 mm to 30 mm inclusive, more preferably from 1 mm to 15 mm inclusive.

The parietal adhesive sections 7 are applied, for example, to the skin-facing surface of the outer sheet 51 or to the non-skin-facing surface of the inner sheet 52 using a coating device.

The elastic elements 53 of the diaper 1A are described in detail below. As shown in FIG. 8 and 10, in each region - the front region A and the rear region B - from one to twenty elastic elements 53 are placed at intervals inward in the longitudinal direction (X direction) from the end edge forming the waist opening WO to the part including the end section absorbent block 10 in the longitudinal direction (X direction). More specifically, in each region - the front, region A and the rear region B - of the diaper 1A, an elastic region ET is formed by placing the elastic elements 53 in a stretched state along the transverse direction (Y direction) between the outer sheet 51 and the inner sheet 52 forming the outer shell 5 The interval between each pair of elastic elements 53, 53 adjacent to each other in the longitudinal direction (X direction) is preferably 1 mm to 20 mm, inclusive, more preferably 3 mm to 10 mm inclusive.

As shown in FIG. 8 and 10, in the elastic region ET, elastic elements 53, which are stretched along the transverse direction (Y direction), are spaced apart in the longitudinal direction (X direction) between the outer sheet 51 and the inner sheet 52. In addition, the outer sheet 51 and the inner sheet 52 are partially bonded to each other by fusion-connected sections of the outer shell 56, spaced at intervals in the transverse direction (Y direction) between each pair of elastic elements 53, 53 adjacent to each other in the longitudinal direction (X direction). In the elastic region ET, in which the outer sheet 51 and the inner sheet 52 are partially bonded to each other as described above, the elastic elements 53 are placed in a stretched state along the transverse direction (Y direction) so that they do not intersect the fusion-connected portions 56 of the outer shell. Outer cladding sections 56 of the outer shell are spaced so that they form a row along the longitudinal direction (X direction), and a plurality of rows of reflow sections are connected, with each row consisting of a plurality of flashing sections 56 of the outer shell formed at intervals between them in the transverse direction (Y direction).

The fusion-bonded sections 56 of the outer shell are formed by overlaying the outer sheet 51 and the inner sheet 52 and hot stamping in the appropriate sections. As for the hot stamping device, it is possible to use a device including a profiling shaft and a support shaft, wherein the outer peripheral surface of the profiling shaft is provided with protrusions having a shape corresponding to the fusion-connected portions 56 of the outer shell. Instead of hot stamping, ultrasonic welding or a laser beam can be used as a method of forming fused bonded sections of the outer shell 56.

In more detail, as shown in FIG. 8 and 10, the outer shell 5 of the diaper 1A is provided with a pair of end fastening portions 57, 57 located on the respective transverse lateral edge portions 5a1, 5a1 in the front region A and the corresponding transverse lateral edge portions 5b1, 5b1 in the rear region B, which are there where the outer sheet 51 and the inner sheet 52 are fastened with glue located between the outer sheet 51 and the inner sheet 52. In addition, the outer shell 5 has a pair of fixing sections 58, 58 on the side of the absorbent block, which are located transverse to the center m direction (Y direction) than the end fastening portions 57 of the front region A, and are located with corresponding overlapping of the corresponding lateral parts of the absorbent block 10 oriented in the longitudinal direction (X direction) in the front region A, and which are located where the outer sheet 51 and the inner sheet 52 are fastened with glue located between the outer sheet 51 and the inner sheet 52. Similarly, the outer shell 5 has a pair of mounting sections 58, 58 on the side of the absorbent block, which are located closer to the center in the opposite direction (Y direction) than the end fastening portions 57 of the rear region B, and are located with corresponding overlapping of the corresponding lateral parts of the absorbent block 10 oriented in the longitudinal direction (X direction) in the rear region B, and which are located where the outer sheet 51 and the inner sheet 52 are fastened with glue located between the outer sheet 51 and the inner sheet 52.

Furthermore, as shown in FIG. 8 and 10, in the front region A and the rear region B, a plurality of elastic elements 53 - of the plurality of elastic elements 53 - which are further outward in the longitudinal direction (X direction) than the opposite ends of the absorbent block 10 in the longitudinal direction (X direction) are attached to the outer sheet 51 and the inner sheet 52 by a pair of end fixing sections 57, 57. In other areas than the end fixing sections 57, 57, these distant elastic elements 53 are not attached to the outer sheet 51 and the inner sheet 52. In addition, in of region A and rear region B, a plurality of elastic elements 53 - of a plurality of elastic elements 53 - which are located at respective overlapping sections of the opposite ends of the absorbent block 10 in the longitudinal direction (X direction), are attached to the outer sheet 51 and the inner sheet 52 by a pair of end fixing sections 57, 57 and a pair of mounting sections 58, 58 from the side of the absorbent block. In the diaper 1A, in areas other than the pair of end attachment portions 57 and the pair of attachment portions 58 on the side of the absorbent block, the elastic elements 53 located on overlapping portions of the opposite ends of the absorbent block 10 are not attached to the outer sheet 51 and the inner sheet 52.

As shown in FIG. 10, in the outer shell 5 of the diaper 1A, in the overlapping region of the absorbent block 10, the elastic action of the elastic elements 53 is reduced by cutting the elastic elements 53 into small segments by a plurality of cutting sections 59. More specifically, each of the parts of the elastic elements 53 located in the overlapping region of the absorbent block 10 is pressed through the outer sheet 51 by spot heat welding at points corresponding to the plurality of cutting sections 59, and thereby cut, while being attached to the outer sheet 51, thus, the elastic effect of these elastic elements is reduced. Thus, by supplying heat during hot stamping, the cutting portions 5 to 9 are formed by heat welding the elastic elements 53 and the outer sheet 51, as well as by cutting the elastic elements 53 when applying heat. Instead of hot stamping, a laser beam, for example, can be used as a method of forming cutting sections 59.

As shown in FIG. 8 and 10, in the diaper 1A, most of the elastic region ET of the outer shell 5 is formed so that it has elasticity in the region between the pair of end fixing sections 57, 57. On the other hand, the remaining elastic region ET has elasticity in the regions further in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction (X direction), however, is less likely to have elasticity in the overlap portion of the absorbent block 10, thus Thus, an elastic region forms, divided into the left and right sides of the diaper 1A.

The following describes the materials for the manufacture of various parts of the diaper 1A.

As for the top sheet 2, the bottom sheet 3, the absorbent member 4, the side cuffs 6, etc., forming the absorbent block 10, it is possible to use various materials commonly used in absorbent articles, such as stretchable disposable diapers, without specific restrictions. For example, for the manufacture of the top sheet 2, for example, a single layer or multilayer nonwoven fabric or a porous film can be used. For the manufacture of the bottom sheet 3 can be used, for example, a moisture-permeable polymer film.

For the manufacture of the absorbent element 4, an element can be used in which the absorbent base formed by the fibrous material and particles of the absorbent polymer is coated with thin paper. For the manufacture of side cuffs 6, for example, a water-repellent single-layer or multi-layer non-woven fabric can be used.

For the manufacture of the outer sheet 51 and the inner sheet 52 forming the outer shell 5, for example, a single-layer non-woven fabric or a laminated non-woven fabric, including two or more layers, including, for example, a non-woven fabric of a spunbond production method, a breathable non-woven fabric, can be used. fabric, hot rolled nonwoven fabric, woven fiber non-woven fabric and non-woven fabric of an aerodynamic production method. Note that various sheet materials can be used to make the outer sheet 51 and the inner sheet 52.

For the manufacture of elastic elements (forming a sealing sleeve of elastic elements 61, elastic elements 53, near-leg elastic elements 55, etc.), for example, synthetic rubber such as styrene-butadiene, butadiene, isoprene or neoprene, natural rubber, can be used. EVA (ethylene vinyl acetate), elastic polyolefins, polyurethane, etc. Regarding the shape of the elastic elements, it can be used, preferably: threadlike elements (rubber threads, etc.), for example, with a rectangular, square, round, oval or polygonal cross-sectional shape; tape elements (flat rubber tapes, etc.); or multi-fiber threads. In particular, it is preferable to use rubber threads from the viewpoint of aesthetics of the appearance and elastic reactivity of the rubber threads for the manufacture of near-leg elastic elements 55.

As for the glue for creating the near-glue adhesive sections 7, the glue for creating the end fastening sections 57 and the fastening sections 58 on the side of the absorbent block for fixing various elements, and glue for fastening the outer shell 5 and the absorbent block 10, etc. with each other, various hot-melt adhesives, etc., commonly used in absorbent products, such as stretchable disposable diapers, can be used without specific restrictions.

The side seams S are formed after creating fused bonded sections 56 of the outer shell by applying end fixing sections 57 from the front region A and end fixing sections 57 from the rear region B and hot stamping is performed on these sections. Instead of hot stamping, ultrasonic welding or a laser beam can be used as a method of creating side seams S.

The following describes the effects of using the above diaper 1A.

As shown in FIG. 10, in a plan view, in a state where the diaper 1A is unfolded and flattened, a plurality of parietal adhesive sections 7 that form the outer shell 5 of the diaper 1A are applied in stripes in the LT region where a plurality of parietal elastic elements 55 are placed and a plurality of parietal the adhesive sections 7 are applied at two or more different intervals, which are the intervals between the corresponding pairs of near-adjacent adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction). More specifically, in the diaper 1A, a plurality of semicircular adhesive sections 7 are arranged so that there are three different intervals, while the intervals between the corresponding pairs of semicircular adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) include: the largest interval Dmax; smallest interval Dmin; and the interval Dmid between the largest interval Dmax and the smallest interval Dmin. Therefore, the air permeability of the outer shell 5 can be improved, the outer shell 5 can be made softer without difficulty, its texture can be improved, while the near-leg elastic elements 55 placed in a stretched state in a curved shape along the leg openings LO between the outer sheet 51 and the inner sheet 52 forming the outer shell 5.

Furthermore, as shown in FIG. 10, in the diaper 1A, the interval between each pair of parietal adhesive portions 7, 7 adjacent to each other in the longitudinal direction (X direction), from a plurality of parietal adhesive portions 7 located near those portions where the curvature (1 / radius of curvature) of the parietal elastic elements 55 large, smaller than the interval between each pair of glue sections 7, 7, adjacent to each other in the longitudinal direction (X direction), from a number of glue sections 7 located near those sections where the curvature (1 / radius of curvature) about olonozhnyh elastic elements 55 is small. Thus, the near-leg elastic elements 55, placed in a stretched state in a curved shape along the leg openings LO, can be fixed securely and efficiently. In particular, in the diaper 1A, the interval Dmin between each pair of adjacent glue sections is the smallest in the regions where the curvature (1 / radius of curvature) of the foot elements 55 (of the front foot elements 551 and of the back foot elements 552) is large - that is, in areas where the anterior parietal elastic elements 551 are superimposed on the side seams S; in the area where the posterior parietal elastic elements 552 are superimposed on the side seams S; and in the area where the front perineal elastic elements 551 intersect with the rear perineal elastic elements 552. Thus, the parietal elastic elements 55 placed in a stretched state in a curved shape along the leg openings LO can be uniformly firmly fixed.

Furthermore, as shown in FIG. 10, in the diaper 1A, the interval Dmax - which is the largest of the intervals between the respective pericarbonate adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) - is located in the region that includes the inflection point 5P2 of the posterior parietal elastic elements 552, which is an area where the curvature (1 / radius of curvature) of the paranoid elastic elements 55 (of the anterior parietal elastic elements 551 and of the posterior parietal elastic elements 552) is small. Thus, it is possible to reduce the number of applied perineal adhesive sections 7 for fixing the outer sheet 51 and the inner sheet 52 forming the outer shell 5, the air permeability of the outer shell 5 is improved, its texture can also be improved. In addition, as a result of the reduction in the number of applied perineal adhesive sections 7, the outer casing 5 can be made softer without difficulty, and thus can freely match the shape of the buttocks of the user, thereby increasing the fit of the diaper 1A during wear.

In addition, in the diaper 1A, as shown in FIG. 10, the interval Dmax — which is the longest of the various intervals between the pairs of parietal adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) —is located in a region including a transverse center line CL2. Thus, it is possible to reduce the number of applied perineal adhesive sections 7 for fixing the outer sheet 51 and the inner sheet 52 forming the outer shell 5, the outer shell 5 can easily be made softer, therefore, the stretchable disposable diaper can be easily folded in half production time, which improves productivity. In addition, a fold is less likely to form in the finished product, therefore, the fit of the diaper 1A during wear is increased.

In addition, in the diaper 1A, as shown in FIG. 10, the interval Dmax - which is the largest of the various intervals between the pairs of near-glue adhesive sections 7, 7 adjacent to each other in the longitudinal direction (X direction) - is in the region in the longitudinal direction (X direction), where the non-fiber-laid sections are located (central fiber-free portion 43 and a pair of lateral fiber-free portions 44, 44) of the absorbent substrate 40. Thus, it is possible to reduce the number of applied near-leg adhesive sections 7 to fix the outer sheet 51 and the inner of the sheet 52 forming the outer shell 5, and, in combination with the effect produced by the non-laid fibers, by the portions of the absorbent substrate 40, the air permeability of the outer shell can be further enhanced. 5.

In addition, as shown in FIG. 8 and 10, in the elastic region ET of the outer shell 5 of the diaper 1A, a plurality of elastic elements 53 are stretched in the transverse direction (Y direction) so that they do not intersect the fusion-connected sections of the outer shell 56 and both ends of each elastic element 53 in a stretched state, fixed between the outer sheet 51 and the inner sheet 52. Thus, as shown in FIG. 12, the outer sheet 51 and the inner sheet 52 form a plurality of bends 51f1, 52f1 protruding continuously along the longitudinal direction (X direction) that span the plurality of elastic elements 53. More specifically, in the elastic region ET of the diaper 1A, as shown in FIG. 12, compression of the elastic members 53 — which are placed in a stretched state along the transverse direction (Y direction) between the outer sheet 51 and the inner sheet 52 — causes the outer sheet 51 and the inner sheet 52 to deform, so that they protrude outward in the thickness direction between each pair of rows fusion-connected sections adjacent to each other in the transverse direction (Y direction), each of which consists of a plurality of fusion-connected sections 54 arranged in a row along the longitudinal direction (X direction ) Thus, bends 51f1, 52f1 formed by the outer sheet 51 or the inner sheet 52 occur between each pair of rows of fusion-connected portions adjacent to each other in the transverse direction (Y direction), and cavities 50A surrounded by a bend arise between the sheets 51, 52 51f1 and bend 52f1. The cavities 50A are formed so that they protrude continuously along the longitudinal direction (X direction) and encompass a plurality of elastic elements 53 that are placed in a stretched state along the transverse direction (Y direction). Thus, the air permeability of the outer shell 5 is improved, and the appearance can also be improved.

Furthermore, as shown in FIG. 10, in the outer shell 5 of the diaper 1A, the elastic elements 53 — of the plurality of elastic elements 53 — located in the overlapping region of the absorbent block 10, are cut into small pieces, and their elastic effect is reduced. Thus, in the crotch region C, the elastic region ET is formed further outward in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction (X direction). Since the elastic region ET in the crotch region is formed further outward in the transverse direction (Y direction) than the transverse sides of the absorbent block 10 oriented in the longitudinal direction (X direction), the air permeability of the outer shell 5 is improved, and the appearance can also be improved.

The following describes a pull-on disposable diaper 1B (hereinafter also referred to as “diaper 1B”) corresponding to a second embodiment of the present utility model (second utility model). In the diaper 1B of the second embodiment of the utility model, the method of arranging the plurality of glue sections 7 is different from the method used in the diaper 1A of the first embodiment of the utility model. The following description regarding the diaper 1B of the second embodiment of the utility model focuses mainly on features other than the diaper 1A of the first embodiment of the utility model, the same elements are accompanied by the same reference numbers, and their description is omitted. The explanation of the diaper 1A is appropriately applied to those features that are not specifically explained. As for the diaper 1B of the second embodiment of the utility model, only effects other than those of the diaper 1A are described. Effects that are not specifically described are similar to those of the diaper 1A, and the description of the effects of the diaper 1A is appropriately applicable to them.

As shown in FIG. 13, in the diaper 1B of the second embodiment of the utility model, the two parietal adhesive sections 7 constituting the outer shell 5 form one of the largest interval Dmax, being located so as to include the region where the inflection point 5P2 of the posterior parietal elastic elements 552 is located, a transverse center line CL2 and sections not laid with fibers (central section not laid with fibers 43 and a pair of lateral sections not laid with fibers 44, 44) of the absorbent substrate 40. In addition, in the sections, with the exception of the largest of the interval Dmax — the LT region in the longitudinal direction (X direction), where a plurality of parietal elastic elements 55 are located, there are a plurality of parietal adhesive sections 7 arranged at an interval that is substantially equal to the DL interval between each pair of parietal elastic elements 55, 55, adjacent to each other in the longitudinal direction (X direction). Thus, a plurality of circumcision adhesive sections 7 in the diaper 1 B are arranged such that there are two different intervals, which are the intervals between the corresponding pairs of circumcision adhesive sections adjacent to each other in the longitudinal direction (X direction).

As shown in FIG. 13, since in the diaper 1B, the parietal adhesive portions 7 are arranged so that there are two different intervals, which are the intervals between the corresponding pairs of parietal adhesive portions adjacent to each other in the longitudinal direction (X direction), a diaper with a more convenient texture can be obtained while maintaining durability.

The present utility model (second utility model) has been described above in accordance with preferred embodiments, however, the present utility model (second utility model) is not limited to the described embodiments and can be modified accordingly.

For example, in the above-described disposable diapers 1A, 1B, the absorbent body 40 constituting the absorbent member 4 includes fiber-free sections (central fiber-free section 43 and a pair of side fiber-free sections 44, 44), as shown in FIG. 10 and 13, however, the absorbent substrate does not need to include non-fiber-lined sections. In addition, as described above, the absorbent base 40 in the diapers 1A, 1B is formed of a plurality of layers — that is, the upper absorbent layer 411 and the lower absorbent layer 412 — however, the absorbent base 40 may have a single layer including a large portion 41 the bulk and sections 42 with a small base mass located on both sides of the portion 41 with a large bulk and having a lower bulk than the portion 41 with a large bulk. Alternatively, the absorbent base may be formed from an absorbent layer having the same bulk (not shown). In cases where the absorbent base has the same bulk, the central fiber-free portion 43 oriented in the longitudinal direction (X direction) may be centered in the transverse direction (Y direction) of the absorbent layer with the same bulk, and the lateral ones not laid fiber sections 44, 44 can be located on both transverse sides of the Central not laid fiber section 43.

In addition, in the above-described disposable diapers 1A, 1B, the parietal adhesive sections 77 constituting the outer shell 5 are arranged such that the largest interval Dmax is from the various intervals between the corresponding pairs of parietal adhesive sections 7, 7 adjacent to each other in the longitudinal direction ( X direction) is located in the region including the inflection point 5P2 of the posterior parietal elastic elements 552 and including the transverse center line CL2, as shown in FIG. 13, however, the largest interval may be in a region including either the inflection point 5P2 of the posterior near-leg elastic elements 552 or the transverse center line CL2. Alternatively, the largest spacing may be in the region including the inflection point 5P1 of the front perineal elastic elements 551.

In addition, the above-described diapers 1A, 1B are pull-on disposable diapers in which the outer shell 5 has a continuous hourglass-like shape extended from the front region A through the crotch region C to the rear region B, as shown in FIG. 7 and 8. However, the utility model can be applied to a pull-on disposable diaper of a separate type, in which the outer shell 5 is divided into separate elements, that is, the front outer shell, the rear outer shell and the crotch outer shell.

In addition, in the diapers 1A, 1B described above, the elastic elements 53 are cut into small pieces by a plurality of welded cutting sections 59 in the overlapping region of the absorbent block 10, as shown in FIG. 10 and 13. However, the elastic elements need not be cut.

In relation to the described embodiments of the utility model, the following disposable diapers are further disclosed.

(one)

A disposable diaper comprising: an absorbent block including an upper sheet, a lower sheet and an absorbent element located between the upper sheet and the lower sheet; and an outer shell located on the side of the surface of the absorbent block not facing the skin, where:

the outer shell includes an outer sheet located on the side of the non-skin surface, which forms the outer surface of the disposable diaper, and an inner sheet located on the side of the skin-facing surface, and also includes those between the outer sheet and the inner sheet: elastic elements stretched in the transverse direction of the disposable diaper; and continuous adhesive sections oriented in the transverse direction and spaced at intervals in the longitudinal direction of the disposable diaper;

the outer shell includes an elastic region; and

the elastic region is formed so that: a plurality of elastic elements are placed at intervals in the longitudinal direction of the disposable diaper; one or more continuous adhesive sections are placed between each pair of elastic elements adjacent to each other in the longitudinal direction; the outer sheet and the inner sheet are bonded to each other by continuous adhesive sections.

(2)

The disposable diaper according to claim (1), wherein the elastic element is a rubber thread.

(3)

The disposable diaper according to (1) or (2), wherein, in the elastic region, the outer sheet and the inner sheet are bonded to each other by adhesive applied to the surface of the elastic element.

(four)

Disposable diaper according to any one of paragraphs. (1) to (3), in which the interval between each pair of continuous adhesive sections adjacent to each other in the longitudinal direction is equal to the length in the longitudinal direction of each continuous adhesive section.

(5)

Disposable diaper according to any one of paragraphs. (1) - (4), in which:

elastic elements include second elastic elements in the front region and the rear region;

the elastic region includes a second elastic region in the front region and the rear region; and

in the second elastic region, which is the elastic region, the second elastic elements, which are stretched in the lateral direction, are spaced longitudinally between the outer sheet and the inner sheet.

(6)

The disposable diaper according to claim (5), wherein one to ten, preferably two to five continuous, adhesive sections are located between each pair of second elastic elements adjacent to each other in the longitudinal direction (X direction).

(7)

Disposable diaper according to any one of paragraphs. (1) - (6), in which:

elastic elements include third elastic elements in the front region;

the elastic region includes a third elastic region in the anterior region; and

in the third elastic region, which is the elastic region, the third elastic elements, which are stretched in the lateral direction, are spaced longitudinally between the outer sheet and the inner sheet.

(8)

The disposable diaper according to claim (7), wherein one to ten, preferably two to five continuous adhesive sections are located between each pair of third elastic elements: adjacent to each other in the longitudinal direction (X direction).

(9)

Disposable diaper according to any one of paragraphs. (1) - (8), in which:

the elastic region includes second elastic regions in the front region and the rear region and a third elastic region in the front region; and

in the second elastic regions and the third elastic region, which are elastic regions, the interval W1 between each pair of continuous adhesive sections adjacent to each other in the longitudinal direction (X direction) is from 0.5 mm to 10 mm inclusive, preferably from 0 , 7 mm to 5 mm inclusive.

(10)

Disposable diaper according to any one of paragraphs. (1) - (9), in which:

the elastic region includes second elastic regions in the front region and the rear region and a third elastic region in the front region; and

in the second elastic regions and the third elastic region, which are elastic regions, the length (width W2) in the longitudinal direction of each continuous adhesive portion is from 0.5 mm to 10 mm inclusive, preferably from 0.7 mm to 5 mm inclusive.

(eleven)

Disposable diaper according to any one of paragraphs. (1) - (10), in which:

elastic elements include second elastic elements in the front region and the rear region and third elastic elements in the front region;

the elastic region includes second elastic regions in the front region and the rear region and a third elastic region in the front region; and

in the second elastic region, the second elastic elements, which are stretched in the lateral direction, are spaced longitudinally between the outer sheet and the inner sheet;

in the third elastic region, the third elastic elements, which are stretched in the lateral direction, are spaced longitudinally between the outer sheet and the inner sheet; and

in the second elastic regions and the third elastic region, which are elastic regions, the interval W3 between each pair of second elastic elements or between each pair of third elastic elements adjacent to each other in the longitudinal direction (X direction) is from 0.5 mm to 10 mm inclusive, preferably from 0.7 mm to 5 mm inclusive.

(12)

Disposable diaper according to any one of paragraphs. (1) - (11), in which the direction of orientation of the fibers constituting at least one of the sheets — the outer sheet and the inner sheet — coincides with the direction along which the continuous adhesive sections are located.

(13)

Disposable diaper according to any one of paragraphs. (1) to (10), in which the elastic region is located further outward in the transverse direction than both transverse sides of the absorbent block oriented in the longitudinal direction.

(fourteen)

Disposable diaper according to any one of paragraphs. (1) - (13), in which:

in the outer shell in the area of overlapping of the absorbent block, the elastic effect of the elastic elements is reduced by cutting the elastic elements into small segments by a plurality of cutting sections; and

the interval between each pair of continuous adhesive sections adjacent to each other in the longitudinal direction is less than the length in the longitudinal direction of each cutting section.

(fifteen)

The disposable diaper according to (14), wherein the length L1 of the cutting portion in the longitudinal direction is from 1 mm to 15 mm inclusive, preferably from 1.5 mm to 10 mm inclusive.

(16)

Disposable diaper according to any one of paragraphs. (1) to (15), wherein the disposable diaper is a stretchable disposable diaper.

(17)

Disposable diaper according to any one of paragraphs. (1) - (16), in which:

near-leg elastic elements are placed between the outer sheet and the inner sheet; and

near-leg elastic elements are fixed between the outer sheet and the inner sheet by a plurality of continuous adhesive sections arranged at intervals in the longitudinal direction (X direction).

(eighteen)

Disposable diaper according to any one of paragraphs. (1) - (17), in which:

elastic elements include first elastic elements in the front region and the rear region;

the outer shell has: a pair of end fastening portions that are located on the respective transverse lateral edge portions in the front region and the corresponding transverse lateral edge portions in the rear region and which are located where the outer sheet and the inner sheet are fastened with glue located between the outer sheet and the inner sheet ; and a pair of fastening portions from the side of the absorbent block, which are located closer to the center in the transverse direction than the end fastening portions of the front region, and are located with corresponding overlapping of the corresponding lateral parts of the absorbent block, oriented in the longitudinal direction, in the front region, and which are located there, where the outer sheet and the inner sheet are fastened with glue located between the outer sheet and the inner sheet; and

in the areas between the end fastening portions and the fastening portions on the side of the absorbent block, the first elastic elements located on the overlapping portions of the opposite ends of the absorbent block are not attached to the outer sheet and the inner sheet.

(19)

Disposable diaper according to any one of paragraphs. (5) - (18), in which a plurality of second elastic elements are fastened across the entire width (Y direction) to the outer sheet and the inner sheet by adhesive applied to the surface of each elastic element using a comb spray gun.

(twenty)

Disposable diaper according to any one of paragraphs. (7) - (19), in which a plurality of third elastic elements are fastened across the entire width (Y direction) to the outer sheet and the inner sheet by adhesive applied to the surface of each elastic element using a comb spray gun.

(21)

Disposable diaper according to any one of paragraphs. (1) - (20), in which:

in the outer shell, the outer sheet and the inner sheet are partially bonded to each other by fusion-connected sections that are spaced apart in the transverse direction; and

bends of the outer sheet or inner sheet are formed between each pair of rows of fusion-connected portions adjacent to each other in the transverse direction (Y direction), and cavities surrounded by a pair of bends are formed between the outer sheet and the inner sheet.

(22)

The disposable diaper according to (21), wherein:

elastic elements include first elastic elements in the front region and the rear region; and

the cavities are formed in such a way that they extend continuously along the longitudinal direction (X direction) and encompass the plurality of first elastic elements, which are stretched along the transverse direction (Y direction).

(23)

Disposable diaper according to any one of paragraphs. (1) - (22), in which:

elastic elements include second elastic elements in the front region and the rear region;

in the outer shell, the outer sheet and the inner sheet are fastened by a plurality of continuous adhesive sections between each pair of second elastic elements adjacent to each other in the longitudinal direction; and

bends running continuously along the second elastic elements are formed between each pair consisting of a second elastic element and a continuous adhesive portion adjacent to this second elastic element.

(24)

A stretchable disposable diaper comprising: an elongated absorbent block including an upper sheet, a lower sheet and an absorbent element located between the upper sheet and the lower sheet; and an outer shell located on the side of the surface of the absorbent block not facing the skin; however, the disposable diaper includes a pair of side seams, a hole for the waist and a pair of leg openings formed by connecting the transverse side edge portions of the front region of the outer shell with the corresponding transverse side edge portions of the rear region of the outer shell;

the outer shell includes an outer sheet located on the side of the non-skin surface, which forms the outer surface of the stretchable disposable diaper, and an inner sheet located on the side of the skin facing surface, and also includes between the outer sheet and the inner sheet: a lot of near-leg elastic elements placed in a stretched state in a curved form along each leg opening; and a plurality of perineal adhesive sites for fixing the perineal elastic elements;

in a plan view, in a state where the pull-on disposable diaper is deployed and flattened, a plurality of glue sections are arranged along the transverse direction of the pull-on disposable diaper in a region in the longitudinal direction of the pull-on disposable diaper, in which there are a plurality of gut and

a plurality of circumflex adhesive sections is arranged so that there are two or more different intervals, which are the intervals between each pair of circumferential adhesive areas adjacent in the longitudinal direction of the stretchable disposable diaper.

(25)

A stretchable disposable diaper according to (24), wherein:

perineal elastic elements include: a plurality of front perineal elastic elements placed in a stretched state from one hole for the legs from the front region to another hole for the legs from the front region through the crotch region; and a plurality of posterior periopical elastic elements placed in an extended state from one leg hole from the back region to another leg hole from the back region through the crotch region;

the front parietal elastic elements and the posterior parietal elastic elements are cut centrally in the transverse direction of the perineal region; and

the largest interval of the various intervals between the pairs of perineal adhesive sections adjacent to each other in the longitudinal direction of the pull-on disposable diaper is either: in the region, within the region where the set of front perineal elastic elements is located, which includes the inflection point of the front perineal elastic elements; or in a region within that region where a plurality of posterior periopical elastic elements are located, which includes an inflection point of the posterior paranex elastic elements.

(26)

A stretchable disposable diaper according to (24) or (25), wherein:

the absorbent element includes an absorbent base including a water absorbent polymer and a sheet wrapping the base that covers the absorbent base;

the absorbent base includes an area not laid by the fibers in which the amount of material forming the absorbent base is small;

in a plan view in a state where the pull-on disposable diaper is deployed and flattened on a plane, the fiber-free portion is oriented in the longitudinal direction of the pull-on disposable diaper; and

the largest interval of the various intervals between the pairs of perineal adhesive sections adjacent to each other in the longitudinal direction of the stretchable disposable diaper is in that region in the longitudinal direction of the stretchable disposable diaper where the portion not laid with fibers is located.

(27)

A stretchable disposable diaper according to claim (26), wherein: the non-fiber spaced portion includes a central non-fiber spaced portion and a pair of side non-fiber spaced sections; and

the largest interval of the various intervals between the pairs of near-legged adhesive sections adjacent to each other in the longitudinal direction of the pull-on disposable diaper is located so that it intersects all sections - the central section not laid with fibers and a couple of lateral sections not laid with fibers.

(28)

Stretchable disposable diaper according to any one of paragraphs. (24) - (27), in which the largest interval of the various intervals between the pairs of parietal adhesive sections adjacent to each other in the longitudinal direction of the stretchable disposable diaper is located in that region, within the region where there are many posterior parietal elastic: elements, which includes the inflection point of the posterior parietal elastic elements.

(29)

Stretchable disposable diaper according to any one of paragraphs. (24) - (28), in which between each pair of glue sections adjacent to each other in the longitudinal direction of a pull-on disposable diaper, from a plurality of glue sections located near those sections where the curvature (1 / radius of curvature) of the perineal elastic elements a larger, smaller than the interval between each pair of circumflex glue sections adjacent to each other in the longitudinal direction, from a plurality of subfibrous glue sections adjacent to those portions where the curvature (1 / radius of curvature) is elastics small.

(thirty)

A stretchable disposable diaper according to claim (29), wherein, in areas where the curvature (1 / radius of curvature) of the paranormal elastic elements 55 is large - that is, in the region where the front periopical elastic elements 551 are superimposed on the side seams S, in the region where the posterior parietal elastic elements 552 are superimposed on the side seams S, and in the region where the front parietal elastic elements 551 intersect with the posterior parietal elastic elements 552, the radius of curvature is from about 10 mm to about 150 mm inclusive.

(31)

Stretchable disposable diaper according to any one of paragraphs. (24) - (30), in which, in a region where a plurality of parietal elastic elements are superimposed on the side seams, the interval between each pair of parietal adhesive sections adjacent to each other in the longitudinal direction of the stretchable disposable diaper is less than the interval between each pair of parietal elastic elements adjacent to each other in the longitudinal direction of the stretchable disposable diaper.

(32)

Stretchable disposable diaper according to any one of paragraphs. (24) - (31), in which the ratio (Dmin / DL) of the interval Dmin between each pair of circumflex adhesive sections adjacent to each other in the longitudinal direction to the interval DL between each pair of circumflex elastic elements adjacent to each other in the longitudinal direction (X direction) is from 0.05 to 0.5 inclusive, preferably from 0.1 to 0.3 inclusive.

(33)

Stretchable disposable diaper according to any one of paragraphs. (24) to (32), in which the interval Dmin between adjacent glue sections is from 0.5 mm to 5 mm inclusive, preferably from 1 mm to 3 mm inclusive.

(34)

Stretchable disposable diaper according to any one of paragraphs. (24) - (33), in which the largest interval of the various intervals between the pairs of parietal adhesive sections adjacent to each other in the longitudinal direction of the stretchable disposable diaper is located in that region including a transverse center line running in the transverse direction that divides the stretchable disposable diaper in half.

(35)

Stretchable disposable diaper according to any one of paragraphs. (24) - (34), in which the largest interval Dmax from various intervals between pairs of parietal adhesive sections adjacent to each other in the longitudinal direction of the stretchable disposable diaper is from 0.5 mm to 50 mm inclusive, preferably from 1 mm to 30 mm inclusive.

(36)

Stretchable disposable diaper according to any one of paragraphs. (26) - (35), in which:

the absorbent base of the absorbent element includes: a section with a large bulk, centered in the transverse direction in the crotch region; and a pair of sections with a low bulk, located on both sides of the plot with a large bulk and having a lower bulk than the plot with a large bulk;

the non-fiber spaced portion includes a central non-fiber spaced portion and a pair of side non-fiber spaced portions;

the central fiber-free portion is formed so that it is located along the longitudinal direction (X direction) in a central, transverse, portion of the portion with a large bulk; and

the lateral fiber-free sections are formed in the corresponding sections with a low bulk.

(37)

Stretchable disposable diaper according to any one of paragraphs. (26) - (36), in which:

the absorbent base of the absorbent element includes an upper absorbent layer and a lower absorbent layer;

the non-fiber spaced portion includes a central non-fiber spaced portion; and

the fiber-free portion is a rectangular through hole elongated in the longitudinal direction (X direction), which extends both through the upper absorbent layer and through the lower absorbent layer.

(38)

Stretchable disposable diaper according to any one of paragraphs. (25) - (37), in which from one to ten front perineal elastic elements are placed at intervals along the narrow portion of the leg openings and fixed by the perineal adhesive sections.

(39)

Stretchable disposable diaper according to any one of paragraphs. (25) - (38), in which from one to ten posterior perineal elastic elements are placed at intervals along the narrow portion of the leg openings and fixed by the perineal adhesive sections.

INDUSTRIAL APPLICABILITY

In accordance with the present utility model (the first utility model), the softness of the outer shell is further increased, the appearance can be improved due to the relative position of the elastic elements and the adhesive sections constituting the outer shell.

In accordance with the present utility model (the second utility model), the air permeability of the outer shell is increased, the outer shell can be made softer without difficulty, its texture can be improved, while near-leg elastic elements securely placed in a stretched state in a curved shape along openings for the legs between the outer sheet and the inner sheet.

Claims (13)

1. A disposable diaper comprising: an absorbent unit including an upper sheet, a lower sheet and an absorbent element located between the upper sheet and the lower sheet; and an outer shell located on a side not facing the skin of the surface of the absorbent block, wherein: the outer shell includes an outer sheet located on the side not facing the skin of the surface, which forms the outer surface of the disposable diaper, and an inner sheet located on the side facing the skin of the surface, and also includes between the outer sheet and the inner sheet: elastic elements, placed stretched in the transverse direction of a disposable diaper; and continuous adhesive sections extending in the transverse direction and spaced apart in the longitudinal direction of the disposable diaper; the outer shell includes an elastic region; and the elastic region is formed so that: a plurality of elastic elements are placed at intervals in the longitudinal direction of the disposable diaper; continuous adhesive sections are placed between each pair of elastic elements adjacent to each other in the longitudinal direction; the outer sheet and the inner sheet are bonded to each other by continuous adhesive sections. 2. The disposable diaper according to claim 1, in which the elastic element is a rubber thread. 3. The disposable diaper according to claim 1, wherein in the elastic region, the outer sheet and the inner sheet are bonded to each other by adhesive applied to the surface of the elastic element. 4. The disposable diaper according to claim 1, in which the interval between each pair of continuous adhesive sections adjacent to each other in the longitudinal direction is equal to the length in the longitudinal direction of each continuous adhesive section. 5. The disposable diaper according to claim 1, wherein the direction of orientation of the fibers constituting at least one of the sheets — the outer sheet and the inner sheet — coincides with the direction along which the continuous adhesive sections are located. 6. The disposable diaper according to claim 1, wherein the elastic region is located further in the transverse direction than both transverse sides of the absorbent block oriented in the longitudinal direction. 7. The disposable diaper according to claim 1, in which: in the outer shell in the area of overlapping of the absorbent block, the elastic effect of the elastic elements is reduced by cutting the elastic elements into small segments by a plurality of cutting sections; and the interval between each pair of continuous adhesive sections adjacent to each other in the longitudinal direction is less than the length in the longitudinal direction of each cutting section. 8. The disposable diaper according to claim 1, wherein the disposable diaper is a pull-on disposable diaper.

Images