JP6342249B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper such as a pants-type disposable diaper.

  In an underpants type disposable diaper, which is an example of a disposable diaper, an exterior body is disposed on the outside of a vertically long absorbent main body provided with an absorber. The exterior body generally includes an outer layer sheet and an inner layer sheet, and includes an elastic member disposed between the outer layer sheet and the inner layer sheet so as to extend in a lateral direction of the disposable diaper. Yes. As a result of the contraction of the elastic member arranged in this manner, a ridge is formed on the exterior body.

  For example, Patent Document 1 describes that an exterior body is joined and integrated by an adhesive pattern constituted by parallel discontinuous adhesive lines intersecting with an elastic member arranged in a laterally extended state. Yes. According to the disposable diaper described in Patent Document 1, a flexible corrugated surface wrinkle is formed on the exterior body by the adhesive pattern, and the flexibility is improved.

Japanese Patent No. 2628173

  However, Patent Document 1 does not describe anything about the arrangement relationship between the elastic member arranged in the laterally extended state and the adhesive. Moreover, there was a need to further improve the flexibility of the exterior body and improve the appearance.

  Therefore, this invention is providing the disposable diaper which can eliminate the fault which the prior art mentioned above has.

  Disclosed is a disposable diaper comprising a topsheet, a backsheet, an absorbent main body comprising an absorbent body disposed between both sheets, and an exterior body disposed on the non-skin facing surface side of the absorbent main body The outer package includes an outer layer sheet on the non-skin facing surface side forming an outer surface of the disposable diaper, an inner layer sheet on the skin facing surface side, and between the outer layer sheet and the inner layer sheet, The disposable diaper has an elastic member arranged in an extended state in the lateral direction, and a strip-like adhesive arranged intermittently in the vertical direction along the lateral direction, and the exterior body includes a stretchable region. In the stretchable region, the plurality of elastic members are intermittently disposed in the longitudinal direction of the disposable diaper, and one or more strip adhesives are disposed between the elastic members adjacent in the longitudinal direction, The outer layer sheet and the inner layer sheet are interposed through a strip adhesive. Bets are intended to provide a disposable diaper which is formed is fixed.

  ADVANTAGE OF THE INVENTION According to this invention, the softness | flexibility of an exterior body improves further and the appearance can be improved with the arrangement | positioning relationship between the elastic member which comprises an exterior body, and an adhesive agent.

FIG. 1 is a perspective view showing a usage state (wearing state) of a pants-type disposable diaper according to an embodiment of the present invention. FIG. 2 is a developed plan view of the state in which the diaper shown in FIG. 1 is developed and stretched as viewed from the skin contact surface side. FIG. 3 is a developed plan view of a state in which the diaper shown in FIG. 1 is developed and stretched as viewed from the non-skin contact surface side. FIG. 4 is an enlarged plan view showing a main part of the diaper shown in FIG. 3 in an enlarged manner. 5 is a cross-sectional view taken along line VV shown in FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG.

  Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. A disposable diaper 1 (hereinafter also referred to as “diaper 1”) according to an embodiment of the present invention includes a liquid permeable top sheet 2, a liquid permeable back sheet 3, as shown in FIGS. A diaper comprising a vertically long absorbent main body 10 provided with an absorbent body 4 disposed between both sheets 2 and 3 and an exterior body 5 disposed on the non-skin facing surface side of the absorbent main body 10. Specifically, the exterior body 5 of the diaper 1 is arranged on the back side of the wearer when wearing the abdominal region A, which is placed on the stomach side of the wearer when worn, in a plan view of the unfolded and extended state. And a crotch region C between the ventral region A and the dorsal region B. The diaper 1 has a pair of side seal portions S, S, a waist formed by joining both side edges 5a1, 5a1 of the exterior body 5 in the ventral region A and both side edges 5b1, 5b1 of the exterior body 5 in the back region B. This is a so-called pants-type disposable diaper in which an opening WO and a pair of leg openings LO, LO are formed.

In the present specification, the “skin facing surface” is a surface of the diaper 1 or a component thereof (for example, the absorbent main body 10) that is directed toward the wearer's skin when worn, and the “non-skin facing surface” is In the diaper 1 or its constituent members, the surface is directed to the side opposite to the wearer's skin side (clothing side) when worn. In the diaper 1, the vertical direction (X direction) coincides with the direction along the long side of the vertically long absorbent main body 10 which is the diaper 1 or a constituent member thereof, and the horizontal direction (Y direction) is a disposable diaper or a constituent member thereof. This corresponds to the width direction of the absorbent main body 10.
Moreover, the diaper 1 is symmetrical with respect to the longitudinal center line CL1 extending in the longitudinal direction (X direction). 2 and 3, CL2 is a horizontal center line extending in the horizontal direction (Y direction) that bisects the diaper 1, and is orthogonal to the vertical center line CL1.

  The state in which the diaper 1 described above is expanded and extended refers to the state where the side seal portion S is peeled off to bring the diaper 1 into an expanded state, as shown in FIGS. This means that the elastic member is extended to the design dimension (same as the dimension when the elastic member is expanded in a flat state without any influence of the elastic member).

  As shown in FIG. 2, the absorbent main body 10 has a vertically long shape in which one direction (longitudinal direction (X direction)) is relatively long. The absorbent main body 10 includes a liquid-permeable surface sheet 2 that forms a skin-facing surface, a liquid-impermeable back surface sheet (including water repellency) that forms a non-skin-facing surface, and both the sheets 2 and 3. And a liquid-retaining absorbent 4 interposed therebetween. Moreover, as shown in FIG. 2, the side cuffs 6 and 6 which have the elastic member distribute | arranged by extending in the vertical direction (X direction) in the both sides along the vertical direction (X direction) of the absorptive main body 10 are shown. Is provided. Specifically, the side cuff 6 is made of a liquid-impermeable or water-repellent and breathable material, and a three-dimensional gather forming elastic member 61 is provided in the vicinity of the free end of each side cuff 6. Are extended in the vertical direction (X direction). When the diaper is worn, the free end portion of the side cuff 6 rises due to the contraction of the elastic member 61 for forming the three-dimensional gather, so that a so-called three-dimensional gather is formed, and the outflow of body fluid in the lateral direction (Y direction) is prevented.

  The absorbent main body 10 configured as described above is bonded to the central portion of the outer package 5 with its longitudinal direction (X direction) aligned with the longitudinal direction (X direction) of the diaper 1 in the unfolded and expanded state. It is joined by the agent. Thus, the exterior body 5 is arranged and bonded and fixed to the non-skin facing surface side of the back sheet 3 constituting the absorbent main body 10 in the thickness direction of the disposable diaper 1.

  As shown in FIGS. 2 and 3, the outer package 5 includes an outer layer sheet 51 on the non-skin facing surface side that forms the outer surface of the diaper 1, an inner layer sheet 52 on the skin facing surface side, and the outer layer sheet 51 and the inner layer sheet. 52 and the elastic member 53 arranged in a state of extending in the horizontal direction (Y direction), and intermittently applied in the vertical direction (X direction) along the horizontal direction (Y direction). It has the strip | belt-shaped adhesive agent 54 (refer FIG. 4). Specifically, in the diaper 1, the outer package 5 includes one outer layer sheet 51 on the non-skin facing surface side that forms the outer surface of the diaper 1 and one inner layer on the skin facing surface side that forms the inner surface of the diaper 1. And a sheet 52. The outer layer sheet 51 and the inner layer sheet 52 are bound inward in the central portion in the longitudinal direction (X direction), and are formed in the same shape and size. A plurality of elastic members 53 and leg elastic members 55 are arranged between the outer layer sheet 51 and the inner layer sheet 52.

  The elastic member 53 of the diaper 1 will be described in detail. As shown in FIGS. 2 and 3, the elastic member 53 has an absorbent main body from the edge serving as the waist opening WO in the ventral region A and the dorsal region B. 5 to 20 first elastic members 531 that are intermittently arranged inward in the longitudinal direction (X direction) toward the portion including both ends of 10 longitudinal directions (X direction), and the most horizontal center line CL2. Intermittently inward in the longitudinal direction (X direction) from the position spaced apart by 2 mm to 25 mm inward in the longitudinal direction (X direction) inward of the first elastic member 531 closer to the peripheral edge serving as the leg opening LO. 3 to 10 second elastic members 532 arranged. Further, the elastic member 53 of the diaper 1 is located only at the ventral region A from a position spaced 3 mm to 8 mm inward in the longitudinal direction (X direction) from the second elastic member 532 closest to the lateral center line CL2. Two to six third elastic members 533 are intermittently arranged inward in the vertical direction (X direction) toward the horizontal center line CL2.

  As shown in FIG. 4, the exterior body 5 includes a stretchable region ET. In the stretchable region ET, a plurality of elastic members 53 are intermittently arranged in the vertical direction (X direction), and one strip adhesive 54 is provided between the elastic members 53 and 53 adjacent in the vertical direction (X direction). Arranged as described above, the outer layer sheet 51 and the inner layer sheet 52 are fixed to each other through the belt-like adhesive 54. Specifically, in the ventral region A and the back region B of the diaper 1, a plurality of the diapers 1 are stretched in the lateral direction (Y direction) between the outer layer sheet 51 and the inner layer sheet 52 constituting the outer package 5. By arranging the first elastic member 531 and the second elastic member 532, the first elastic region T1 and the second elastic region T2 are formed, respectively. In the ventral region A, a plurality of third elastic members 533 are arranged between the outer layer sheet 51 and the inner layer sheet 52 constituting the exterior body 5 in a state of extending in the lateral direction (Y direction). Thus, the third elastic region T3 is formed. In the diaper 1, the expansion / contraction region ET described above corresponds to the second elastic region T2 of the ventral region A and the dorsal region B and the third elastic region T3 of the ventral region A.

  In the second elastic region T2 which is the expansion / contraction region ET, as shown in FIG. 4, the second elastic member 532 in a state of extending in the lateral direction (Y direction) is longitudinally disposed between the outer layer sheet 51 and the inner layer sheet 52. They are arranged intermittently in the (X direction). Moreover, the strip | belt-shaped adhesive 54 distribute | arranged for every between the 2nd elastic members 532 and 532 adjacent to the vertical direction (X direction) is coated in strip | belt shape along a horizontal direction (Y direction). It is preferable that one or more and ten or less strip adhesives 54 are disposed between the second elastic members 532 and 532 adjacent in the longitudinal direction (X direction), and preferably two or more and five or less. It is particularly preferred that they are arranged. In addition, in the diaper 1, as shown in FIG. 4, the two strip | belt-shaped adhesives 54 are distribute | arranged for every 2nd elastic members 532 and 532 adjacent to the vertical direction (X direction). Then, the outer layer sheet 51 and the inner layer sheet 52 are partially joined by the belt-like adhesive 54, and the second elastic region T2 (elastic region ET) to which the elastic property is imparted by the plurality of second elastic members 532 is provided. Will be formed.

  In the third elastic region T3, which is the expansion / contraction region ET, as shown in FIG. 4, the third elastic member 533 that extends in the lateral direction (Y direction) is disposed between the outer layer sheet 51 and the inner layer sheet 52 in the vertical direction. They are arranged intermittently in the (X direction). Moreover, the strip | belt-shaped adhesive agent 54 distribute | arranged for every between 3rd elastic members 533 and 533 adjacent to the vertical direction (X direction) is applied along the horizontal direction (Y direction). It is preferable that 1 or more and 4 or less strip adhesives 54 are disposed between the third elastic members 533 and 533 adjacent in the longitudinal direction (X direction). It is particularly preferred that they are arranged. In addition, in the diaper 1, as shown in FIG. 4, the two strip | belt-shaped adhesives 54 are distribute | arranged for every 3rd elastic members 533 and 533 adjacent to the vertical direction (X direction). Then, the third elastic region T3 (expandable region ET) in which the outer layer sheet 51 and the inner layer sheet 52 are partially joined by the belt-like adhesive 54 and provided with elasticity by the plurality of third elastic members 533. Will be formed.

In the second elastic region T2 and the third elastic region T3, which are the expansion and contraction regions ET, the distance between the belt-like adhesives 54 and 54 adjacent in the longitudinal direction (X direction) from the viewpoint of the balance between softening and adhesive strength. It is preferable that W1 (see FIG. 4) and the length (width W2) in the vertical direction of each strip-shaped adhesive 54 (see FIG. 4) are the same.
Specifically, in the second elastic region T2 and the third elastic region T3 which are the expansion and contraction regions ET, the interval W1 (see FIG. 4) between the strip-like adhesives 54 and 54 adjacent in the longitudinal direction (X direction) is From the same viewpoint, it is preferably 0.5 mm or more and 10 mm or less, and more preferably 0.7 mm or more and 5 mm or less.
From the same viewpoint, the longitudinal length (width W2) (see FIG. 4) of each strip-shaped adhesive 54 is preferably 0.5 mm or more and 10 mm or less, and more preferably 0.7 mm or more and 5 mm or less. preferable.
In the second elastic region T2 and the third elastic region T3 that are the expansion and contraction regions ET, the second elastic members 532 and 532 adjacent in the longitudinal direction (X direction) or the third elastic members 533 and 533 are mutually connected. The interval W3 is preferably 0.5 mm to 10 mm, and more preferably 0.7 mm to 5 mm.

  The strip-shaped adhesive 54 is applied to the skin facing surface of the outer layer sheet 51 or the non-skin facing surface of the inner layer sheet 52 using, for example, a coater.

  In the first elastic region T1, as shown in FIG. 2 to FIG. 4, the first elastic member 531 in the state of extending in the lateral direction (Y direction) is disposed between the outer layer sheet 51 and the inner layer sheet 52 in the vertical direction. They are arranged intermittently in the (X direction). Further, the outer layer sheet 51 and the inner layer sheet are provided by the outer body fusion portion 56 that is intermittently disposed in the horizontal direction (Y direction) between the first elastic members 531 and 531 adjacent in the vertical direction (X direction). A part between the two and 52 is fixed. As described above, in the first elastic region T1 in which the space between the outer layer sheet 51 and the inner layer sheet 52 is partially fixed, the plurality of elastic members 531 are arranged in the lateral direction so as not to pass through the plurality of exterior body fused portions 56. (Y direction) is arranged in an expanded state. The exterior body fusion parts 56 are intermittently arranged in a row along the vertical direction (X direction), and the row of fusion parts composed of the plurality of exterior body fusion parts 54 is arranged in the horizontal direction. A plurality of rows are formed at intervals in the (Y direction).

  The outer package fusion part 56 is formed by overlapping the outer layer sheet 51 and the inner layer sheet 52 and subjecting the part to hot embossing. As a heat embossing apparatus, an embossing roll and an anvil roll are provided, and what has the convex part of the shape corresponding to the melt | fusion part of the exterior body melt | fusion part 56 can be used in the outer peripheral surface of the embossing roll. As a process for forming the outer package fusion part 56, an ultrasonic seal, a laser, or the like can be employed instead of the heat embossing process.

  Moreover, in the diaper 1, as shown in FIGS. 2-4, a leg elastic member is extended between the outer layer sheet 51 and the inner layer sheet 52 along the constriction of the center part of the outer layer sheet 51 and the inner layer sheet 52. 55 is arranged. The leg elastic member 55 is fixed between the outer layer sheet 51 and the inner layer sheet 52 by the above-described plurality of strip adhesives 54 that are intermittently arranged in the vertical direction (X direction).

The outer package 5 of the diaper 1 will be further described in detail.
As shown in FIGS. 3 and 4, the outer package 5 is located at both side edges 5 a 1, 5 a 1 of the ventral region A and both side edges 5 b 1, 5 b 1 of the back side region B, and an outer layer sheet 51 and an inner layer sheet 52. A pair of end fixing portions 57, 57 to which the outer layer sheet 51 and the inner layer sheet 52 are fixed by an adhesive disposed between them. Further, the exterior body 5 is closer to the center in the lateral direction (Y direction) than the end fixing portion 57 of the ventral region A and both sides along the longitudinal direction (X direction) of the absorbent main body 10 in the ventral region A. A pair of absorbent main body-side fixing portions 58 and 58 to which the outer layer sheet 51 and the inner layer sheet 52 are fixed by an adhesive disposed between the outer layer sheet 51 and the inner layer sheet 52 are provided at positions overlapping with each other. Similarly, the exterior body 5 is closer to the center in the lateral direction (Y direction) than the end fixing portion 57 of the back side region B, and is along the longitudinal direction (X direction) of the absorbent main body 10 in the back side region B. A pair of absorbent main body side fixing portions 58 and 58 to which the outer layer sheet 51 and the inner layer sheet 52 are fixed by an adhesive disposed between the outer layer sheet 51 and the inner layer sheet 52 are provided at positions overlapping the both side portions. .

  As shown in FIGS. 2 to 4, in the ventral region A and the dorsal region B, the longitudinal direction (X direction) of the absorbent main body 10 out of the plurality of first elastic members 531 is longer than both ends. The plurality of first elastic members 531 positioned outward in the direction (X direction) are fixed to the outer layer sheet 51 and the inner layer sheet 52 by a pair of end fixing portions 57 and 57. The plurality of first elastic members 531 located outside are not fixed to the outer layer sheet 51 and the inner layer sheet 52 in a region excluding the pair of end fixing portions 57 and 57. Further, in the ventral region A and the dorsal region B, a plurality of first elastic members located at portions overlapping with both longitudinal ends (X direction) of the absorbent main body 10 among the plurality of first elastic members 531. 531 is being fixed to the outer layer sheet | seat 51 and the inner layer sheet | seat 52 by a pair of edge part fixing | fixed part 57,57 and a pair of absorptive main body side fixing | fixed part 58,58. In the diaper 1, the plurality of first elastic members 531 located at portions overlapping the both end portions of the absorbent main body 10 are in the region between each end fixing portion 57 and each absorbent main body side fixing portion 58. The outer layer sheet 51 and the inner layer sheet 52 are not fixed. The plurality of first elastic members 531 located at the portions overlapping the both end portions of the absorbent main body 10 are bonded to the outer layer sheet 51 by an adhesive in a region sandwiched between the pair of absorbent main body side fixing portions 58 and 58. And it is fixed to the inner layer sheet 52.

  As shown in FIGS. 2 to 4, in the ventral region A and the dorsal region B, the plurality of second elastic members 532 include a pair of end fixing portions 57 and 57 and a pair of absorbent main body fixing portions. The outer layer sheet 51 and the inner layer sheet 52 are fixed at 58 and 58. Further, in the diaper 1, the plurality of second elastic members 532 are spread across the entire lateral direction (Y direction) on the outer layer sheet 51 and the inner layer sheet 52 by a surface adhesive applied to the surface of the elastic member using a comb gun. It is fixed over.

  As shown in FIGS. 2 to 4, in the ventral region A, the plurality of third elastic members 533 are fixed to the outer layer sheet 51 and the inner layer sheet 52 by a pair of absorbent main body side fixing portions 58 and 58. ing. Further, in the diaper 1, the plurality of third elastic members 533 are spread across the entire lateral direction (Y direction) on the outer layer sheet 51 and the inner layer sheet 52 by a surface adhesive applied to the surface of the elastic member using a comb gun. It is fixed over.

  In the outer body 5 of the diaper 1, each elastic member 53 is finely divided by a plurality of cutting portions 59 in a region overlapping the absorbent main body 10, and the expansion / contraction function of the elastic member 53 is reduced. Specifically, a part of the plurality of first elastic members 531, a plurality of second elastic members 532, and a plurality of third elastic members 533 arranged in a region overlapping with the absorbent main body 10 are provided one by one. It is stepped and cut by a dot-shaped heat seal through the outer layer sheet 51 at the position of the individual cutting portions 59, and the contraction function of the elastic member is reduced. Thus, the cutting part 59 is formed by applying heat embossing and cutting the elastic member 53 with heat. As a process for forming the cut portion 59, a laser or the like can be employed instead of the heat embossing process.

  The relationship between the interval W1 (see FIG. 4) between the strip-like adhesives 54 adjacent to each other in the vertical direction (X direction) and the vertical length L1 of each cutting portion 59 is not particularly limited. However, from the viewpoint that the finely divided elastic member 53 does not easily fall out from the opening of the cutting portion 59, the interval W1 between the adjacent strip adhesives 54, 54 is longer than the longitudinal length L1 of each cutting portion 59. Short is preferred. From the same viewpoint, the length L1 in the vertical direction of each cutting part 59 is preferably 1 mm or more and 15 mm or less, and more preferably 1.5 mm or more and 10 mm or less.

  As described above, the plurality of second elastic members 532 and the plurality of third elastic members 533 are individually divided in the region overlapping the absorbent main body 10 to reduce the expansion / contraction function. Therefore, the second elastic region T2 and the third elastic region T3, which are the stretchable regions ET, are formed outward in the lateral direction (Y direction) from both side portions along the longitudinal direction (X direction) of the absorbent main body 10. Yes. Specifically, as shown in FIG. 4, in the diaper 1, most of the first elastic region T <b> 1 is formed to develop stretchability between the pair of end fixing portions 57 and 57. Yes. Then, the remaining part of the first elastic region T1, the second elastic region T2, and the third elastic region T3 are in a lateral direction (rather than both sides along the longitudinal direction (X direction) of the absorbent main body 10 ( Y direction) Expresses stretchability outwardly, hardly develops stretchability in a portion overlapping the absorbent main body 10, and is formed in a state of being divided into left and right of the diaper 1.

The formation material of each part of the diaper 1 mentioned above is demonstrated.
As the surface sheet 2, the back sheet 3, the absorbent body 4, the side cuff 6 and the like constituting the absorbent main body 10, various kinds of materials conventionally used for absorbent articles such as disposable diapers are used without particular limitation. Can do. For example, as the surface sheet 2, a single layer or multilayer nonwoven fabric, an apertured film, or the like can be used. As the back sheet 3, a moisture-permeable resin film or the like can be used. As the absorbent body 4, an absorbent core made of absorbent polymer particles and a fiber material and covered with tissue paper can be used. Moreover, as the side cuff 6, a water-repellent single layer or multilayer nonwoven fabric or the like can be used.

  As the outer layer sheet 51 and the inner layer sheet 52 constituting the outer package 5, a single layer nonwoven fabric made of a spunbond nonwoven fabric, an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a meltblown nonwoven fabric, or a laminated nonwoven fabric of two or more layers is used. be able to. Different sheet materials may be used for the outer layer sheet 51 and the inner layer sheet 52.

  Examples of elastic members (three-dimensional gather forming elastic member 61, elastic member 53, etc.) include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. it can. As a form of the elastic member, a cross-sectionally rectangular, square, circular, elliptical or polygonal thread shape (thread rubber or the like), a string shape (flat rubber etc.), or a multifilament type thread shape or the like It can be preferably used. In particular, the elastic member 53 is from the viewpoint of improving the flexibility and appearance by reducing the number of elastic members, and from the viewpoint of widening the non-adhesive region of the region bonded with the belt-like adhesive composed of the adhesive portion and the non-adhesive portion. Thread rubber is preferably used.

  Absorbents such as disposable diapers may be used as the band-shaped adhesive 54, the adhesive that forms the outer fixing region 57 and the main body-side fixing region 58 that fix each member, and the adhesive that fixes the outer package 5 and the absorbent main body 10. Various hot melt adhesives conventionally used for articles can be used without particular limitation.

  The side seal portion S is formed by stacking the end portion fixing portion 57 on the ventral region A side and the end portion fixing portion 57 on the back side region B side after the formation of the outer body fusion portion 56, and heat embossing the portion. It is formed by giving. Further, as a process for forming the side seal portion S, an ultrasonic seal, a laser, or the like may be employed instead of the heat embossing process.

The effect at the time of using the diaper 1 mentioned above is demonstrated.
As shown in FIG. 4, the outer body 5 of the diaper 1 includes a second elastic member 532 and a third elastic member 533 that are intermittently arranged in the vertical direction (X direction) in the ventral region A. One or more strip adhesives 54 are arranged between the second elastic members 532 and 532 and the third elastic members 533 and 533 adjacent to each other in the X direction), and the outer layer sheet 51 and the inner layer sheet are interposed via the strip adhesive 54. 52 includes a stretchable region ET (second elastic region T2 and third elastic region T3) formed by being fixed. Further, in the exterior body 5 of the diaper 1, in the back region B, the second elastic member 532 is intermittently arranged in the vertical direction (X direction), and the second elastic member 532 adjacent in the vertical direction (X direction). , 532, one or more belt-like adhesives 54 are arranged, and the stretchable region ET (second elastic region T2) formed by fixing the outer layer sheet 51 and the inner layer sheet 52 via the belt-like adhesive 54 is provided. I have. Thus, due to the arrangement relationship between the elastic member 53 constituting the exterior body 5 and the belt-like adhesive 54, as shown in FIG. 5, for example, between the second elastic members 532 and 532 adjacent in the vertical direction (X direction). Each time, the outer layer sheet 51 and the inner layer sheet 52 are fixed via a plurality of strip adhesives 54, and the second elastic member is provided between the strip adhesives 54, 54 adjacent in the longitudinal direction (X direction). It is easy to form a plurality of ridges 51f and 52f extending continuously along the member 532. Specifically, the elastic member 53 disposed in an extended state in the lateral direction (Y direction) disposed between the outer layer sheet 51 and the inner layer sheet 52 contracts, thereby adjacent to each longitudinal direction (X direction). For example, the outer layer sheet 51 and the inner layer sheet 52 swell outward in the thickness direction between the strip-shaped adhesives 54 and 54 adjacent to each other in the longitudinal direction (X direction) between the second elastic members 532 and 532. And the flanges 51f and 52f made of the outer layer sheet 51 or the inner layer sheet 52 are generated between the belt-like adhesives 54 and 54 adjacent to each other in the longitudinal direction (X direction), and between the sheets 51 and 52, A hollow portion 50 surrounded by the flange 51f and the flange 52f is formed. The same applies to the third elastic members 533 and 533. Therefore, the flexibility of the exterior body 5 is further improved, and the appearance can be improved. Moreover, the air permeability and the touch of the exterior body 5 are also improved.

  Further, as shown in FIGS. 3 and 4, the exterior body 5 of the diaper 1 is laterally arranged so that the plurality of first elastic members 531 do not pass through the plurality of exterior body fusion portions 56 in the first elastic region T <b> 1. The both ends of the first elastic member 531 arranged in the stretched state in the direction (Y direction) are fixed between the outer layer sheet 51 and the inner layer sheet 52, as shown in FIG. Thus, each of the outer layer sheet 51 and the inner layer sheet 52 forms a plurality of flanges 51f1 and 52f1 extending continuously in the longitudinal direction (X direction) across the plurality of elastic members 531. Specifically, in the first elastic region T1 of the diaper 1, as shown in FIG. 6, the first elasticity arranged in an extended state in the lateral direction (Y direction) between the outer layer sheet 51 and the inner layer sheet 52. When the member 531 contracts, the outer layer sheet 51 between the rows of the fusion parts composed of a plurality of exterior body fusion parts 54 that are adjacent to each other in the horizontal direction (Y direction) and form a row in the vertical direction (X direction). And the inner layer sheet 52 is deformed so as to swell outward in the thickness direction, and the flanges 51f1 and 52f1 made of the outer layer sheet 51 or the inner layer sheet 52 are generated between the rows of the fusion parts adjacent in the lateral direction (Y direction). At the same time, a hollow portion 50A is formed between the sheets 51 and 52, the periphery of which is surrounded by the flange 51f1 and the flange 51f1. And hollow part 50A is formed so that it may extend continuously in the vertical direction (X direction) over the plurality of elastic members 531 arranged in a stretched state in the horizontal direction (Y direction). Therefore, the air permeability of the exterior body 5 is improved, and the appearance can be improved.

  As shown in FIGS. 3 and 4, the outer package 5 of the diaper 1 is divided into a plurality of second elastic members 532 and a plurality of third elastic members 533 in a region overlapping the absorbent main body 10. The telescopic function is reduced. Therefore, the second elastic region T2 and the third elastic region T3, which are the stretchable regions ET, are formed outward in the lateral direction (Y direction) from both side portions along the longitudinal direction (X direction) of the absorbent main body 10. Yes. Thus, since the 2nd elastic region T2 and the 3rd elastic region T3 are formed in the horizontal direction (Y direction) outward rather than the both sides along the vertical direction (X direction) of the absorptive main body 10, the collar part And the fit around the legs is improved, and the touch is easy to improve.

  Further, the outer package 5 of the diaper 1 includes a plurality of strip-like adhesives 54 between the second elastic members 532 and 532 and between the third elastic members 533 and 533 adjacent in the longitudinal direction (X direction). The outer layer sheet 51 and the inner layer sheet 52 are fixed to each other through the second elastic member 532 and the third elastic member 533 at intervals between the belt-like adhesives 54 and 54 adjacent in the longitudinal direction (X direction). It is easy to form a plurality of ridges 51f and 52f extending continuously (see FIG. 5). In the diaper 1, in the stretchable region (second elastic region T2 and third elastic region T3), the outer layer sheet 51 and the inner layer sheet 52 are further fixed via a surface adhesive disposed on the surface of the elastic member 53. Has been. Thus, when the outer layer sheet 51 and the inner layer sheet 52 are further fixed via the surface adhesive disposed on the surface of the second elastic member 532, the second elastic member 532 and the second elastic member 532 are adjacent to each other. A ridge that extends continuously along the second elastic member 532 is easily formed between the belt-like adhesive 54 and the belt-like adhesive 54. The same applies when a surface adhesive is provided on the surface of the third elastic member 533. Therefore, if it is set as such a structure, the softness | flexibility of the exterior body 5 will improve further and it can further improve an appearance.

  It is preferable to have the following configuration from the viewpoint of more surely expressing the above-described effects.

  In at least one of the outer layer sheet 51 and the inner layer sheet 52, the fiber orientation direction of the constituent fibers preferably coincides with the direction in which the strip adhesive 54 is disposed. Specifically, in the diaper 1, the belt-like adhesive 54 extends in the lateral direction (Y direction) that is the coating direction, and the fibers of at least one of the constituent fibers of the outer layer sheet 51 and the inner layer sheet 52. When the orientation direction is the lateral direction (Y direction), the elastic member 53 contracts, so that the outer layer sheet 51 and the belt-shaped adhesives 54 adjacent to each other in the longitudinal direction (X direction) and The inner layer sheet 52 is easily deformed so as to further swell outward in the thickness direction. Therefore, the flanges 51f and 52f (see FIG. 6) made of the outer layer sheet 51 or the inner layer sheet 52 are easily generated between the belt-like adhesives 54 and 54 adjacent in the vertical direction (X direction). Thus, the hollow portion 50 surrounded by the flange 51f and the flange 52f is easily formed. Therefore, the flexibility of the exterior body 5 is further improved, and the appearance can be further improved.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, the disposable diaper 1 described above is a pants-type disposable diaper having a continuous shape such as an hourglass shape in which the exterior body 5 extends over the ventral region A, the crotch region C, and the dorsal region B as shown in FIGS. However, the exterior body 5 may be a split-type pants-type disposable diaper that is divided as a separate member into an abdominal exterior body, a back exterior body, and a crotch exterior body.

  The exterior body 5 is formed in a continuous shape such as an hourglass shape extending over the ventral region A, the crotch region C, and the dorsal region B, and a pair of fastening tapes are provided on the left and right side edges of the dorsal region B. Further, it may be a deployable disposable diaper in which a landing tape for fastening the fastening tape is provided on the non-skin facing surface of the ventral region A. Further, the exterior body 5 is formed in a continuous shape such as a rectangular shape extending over the ventral region A, the crotch region C, and the dorsal region B, and laterally outwardly on each of the left and right side edges of the dorsal region B. An unfolded disposable diaper in which a side panel extending to the side panel is attached and a fastening tape is attached to the laterally outward side of the side panel may be used. In the case of such unfolded disposable diapers, the outer layer sheet 51 constituting the outer package 5 is made of a nonwoven fabric, and the inner layer sheet 52 constituting the outer package 5 is made of a moisture-permeable resin film. The elastic member 53 and the belt-like adhesive 54 are disposed between the resin film and the exterior body 5 is formed.

  Moreover, in the disposable diaper 1 mentioned above, as shown to FIG. 3, FIG. 4, the expansion-contraction area | region ET is formed in the 2nd elastic region T2 and the 3rd elastic region T3, and also the vertical direction of the absorptive main body 10 Although it is formed in a region outward in the lateral direction (Y direction) from both side portions along the (X direction), it is not limited to those places, and may be formed in another region.

  Moreover, in the disposable diaper 1 mentioned above, as shown in FIG. 4, the two strip | belt-shaped adhesives 54 are distribute | arranged for every 2nd elastic members 532 and 532 adjacent to the vertical direction (X direction), Two strip adhesives 54 are arranged between the third elastic members 533 and 533 adjacent in the longitudinal direction (X direction). It only has to be done.

  Moreover, in the disposable diaper 1 mentioned above, as shown in FIG. 3, although each elastic member 53 is divided | segmented finely by the some cutting part 59 in the area | region which overlaps with the absorptive main body 10, it is divided | segmented. It does not have to be.

  In the disposable diaper 1 described above, the surface adhesive is applied to the surface of the second elastic region T2 or the surface of the third elastic region T3 using a comb gun, but it may not be applied.

  Moreover, both may overlap partially due to the relationship between the pitch of the elastic member and the pitch of the belt-like adhesive.

  The following disposable diaper is further disclosed regarding the embodiment mentioned above.

<1>
A disposable diaper comprising a topsheet, a backsheet, an absorbent main body provided with an absorbent body disposed between both sheets, and an exterior body disposed on the non-skin facing surface side of the absorbent main body,
The exterior body includes an outer layer sheet on the non-skin facing surface side that forms an outer surface of the disposable diaper, an inner layer sheet on the skin facing surface side, and a side of the disposable diaper between the outer layer sheet and the inner layer sheet. An elastic member arranged in a state extending in the direction, and a strip-like adhesive arranged intermittently in the vertical direction along the horizontal direction,
The exterior body includes an expansion / contraction region, and the expansion / contraction region includes a plurality of the elastic members arranged intermittently in the vertical direction of the disposable diaper, and the elastic members adjacent to each other in the vertical direction. A disposable diaper in which one or more strip adhesives are arranged, and the outer layer sheet and the inner layer sheet are fixed via the strip adhesive.

<2>
The disposable diaper according to <1>, wherein the elastic member is a rubber thread.
<3>
The disposable diaper according to <1> or <2>, wherein the outer layer sheet and the inner layer sheet are fixed via a surface adhesive disposed on the surface of the elastic member in the stretchable region.
<4>
The disposable diaper according to any one of <1> to <3>, wherein an interval between the strip-shaped adhesives adjacent to each other in the vertical direction and a length of each strip-shaped adhesive in the vertical direction are the same.
<5>
The elastic member has a second elastic member in the ventral region and the dorsal region,
The stretchable region has a second elastic region in the ventral region and the dorsal region,
In the second elastic region, which is the stretchable region, the second elastic member in a state of extending in the lateral direction is intermittently arranged in the vertical direction between the outer layer sheet and the inner layer sheet. The disposable diaper according to any one of> to <4>.
<6>
1 to 10 or less, preferably 2 or more and 5 or less of the band-shaped adhesives disposed between the second elastic members adjacent in the longitudinal direction (X direction). The disposable diaper described in>.
<7>
The elastic member has a third elastic member in the ventral region,
The stretchable region has a third elastic region in the ventral region,
In the third elastic region, which is the stretchable region, the third elastic member in a laterally extended state is intermittently arranged in the vertical direction between the outer layer sheet and the inner layer sheet. The disposable diaper according to any one of> to <6>.
<8>
1 to 4 or less, preferably 1 or more and 3 or less of the belt-shaped adhesive disposed between the third elastic members adjacent to each other in the vertical direction is disposed according to <7>. Disposable diapers.
<9>
The stretchable region has a second elastic region in the ventral region and the dorsal region, and a third elastic region in the ventral region,
In the second elastic region and the third elastic region, which are the stretchable regions, the interval W1 between the strip adhesives adjacent in the longitudinal direction (X direction) is 0.5 mm or more and 10 mm or less, preferably 0. The disposable diaper according to any one of <1> to <8>, which is 7 mm or more and 5 mm or less.
<10>
The stretchable region has a second elastic region in the ventral region and the dorsal region, and a third elastic region in the ventral region,
In the second elastic region and the third elastic region, which are the stretch regions, the length (width W2) of the strip adhesive in the vertical direction is 0.5 mm or more and 10 mm or less, preferably 0.7 mm or more and 5 mm or less. The disposable diaper according to any one of <1> to <9>, wherein
<11>
The elastic member has a second elastic member in the ventral region and the dorsal region, and has a third elastic member in the ventral region,
The stretchable region has a second elastic region in the ventral region and the dorsal region, and a third elastic region in the ventral region,
In the second elastic region, between the outer layer sheet and the inner layer sheet, the second elastic member in a state of extending in the horizontal direction is intermittently arranged in the vertical direction,
In the third elastic region, between the outer layer sheet and the inner layer sheet, the third elastic member in a state of extending in the horizontal direction is intermittently arranged in the vertical direction,
In the second elastic region and the third elastic region, which are the expansion and contraction regions, there is an interval W3 between the second elastic members adjacent in the longitudinal direction (X direction) or between the third elastic members. The disposable diaper according to any one of <1> to <10>, which is 0.5 mm to 10 mm, preferably 0.7 mm to 5 mm.
<12>
At least one of the outer layer sheet and the inner layer sheet is any one of the above items <1> to <11>, in which the fiber orientation direction of the constituent fibers coincides with the coating direction of the strip adhesive. Disposable diapers.

<13>
The disposable diaper according to any one of <1> to <12>, wherein the stretchable region is formed laterally outward from both side portions along the longitudinal direction of the absorbent main body.
<14>
In the region where the exterior body overlaps the absorbent main body, each elastic member is divided into a plurality of cut portions, and the expansion and contraction function of the elastic member is reduced.
The disposable diaper according to any one of <1> to <13>, wherein an interval between the strip-shaped adhesives adjacent in the vertical direction is shorter than a length in a vertical direction of each of the cut portions.
<15>
The disposable diaper according to <14>, wherein the longitudinal length L1 of the cut portion is 1 mm or more and 15 mm or less, preferably 1.5 mm or more and 10 mm or less.
<16>
The disposable diaper is the disposable diaper according to any one of <1> to <15>, which is a pants-type disposable diaper.
<17>
Leg elastic members are arranged between the outer layer sheet and the inner layer sheet,
<1> to <16, wherein the leg elastic member is fixed between the outer layer sheet and the inner layer sheet by a plurality of the strip-like adhesives that are intermittently arranged in the vertical direction (X direction). > The disposable diaper of any one of>.
<18>
The elastic member has a first elastic member in the ventral region and the dorsal region,
The outer body is located on both side edges of the ventral region and both side edges of the back region, and the outer layer sheet and the inner layer sheet are fixed by an adhesive disposed between the outer layer sheet and the inner layer sheet. A pair of end fixing portions and a position closer to the center in the lateral direction than the end fixing portion of the ventral region, and overlapping the both side portions along the longitudinal direction of the absorbent main body in the ventral region, The outer layer sheet and the inner layer sheet have a pair of absorbent main body side fixing portions to which the outer layer sheet and the inner layer sheet are fixed by an adhesive disposed between the outer layer sheet and the inner layer sheet,
A plurality of the first elastic members positioned at portions overlapping with both end portions of the absorbent main body are formed on the outer layer sheet and the inner layer sheet in a region between the end fixing portion and the absorbent main body side fixing portion. The disposable diaper according to any one of <1> to <17>, which is not fixed.
<19>
The plurality of second elastic members are fixed across the entire lateral direction (Y direction) to the outer layer sheet and the inner layer sheet by a surface adhesive applied to the surface of the elastic member using a comb gun. The disposable diaper according to any one of <5> to <18>.
<20>
The plurality of third elastic members are fixed to the outer layer sheet and the inner layer sheet across the entire lateral direction (Y direction) by a surface adhesive applied to the surface of the elastic member using a comb gun. The disposable diaper according to any one of <7> to <19>.
<21>
The exterior body is partially fixed between the outer layer sheet and the inner layer sheet by a fusion part intermittently arranged in the lateral direction,
A wrinkle formed of the outer layer sheet or the inner layer sheet is generated between rows of the fusion parts adjacent to each other in the lateral direction (Y direction), and the periphery is surrounded by the wrinkle between the outer layer sheet and the inner layer sheet. The disposable diaper according to any one of <1> to <20>, wherein a hollow portion is formed.
<22>
The elastic member has a first elastic member in the ventral region and the dorsal region,
The said hollow part is formed so that it may extend so that it may extend continuously in the vertical direction (X direction) over several of the said 1st elastic member distribute | arranged by extending | stretching in the horizontal direction (Y direction). Disposable diapers.
<23>
The elastic member has a second elastic member in the ventral region and the dorsal region,
In the exterior body, the outer layer sheet and the inner layer sheet are fixed via a plurality of the strip-shaped adhesives between the second elastic members adjacent in the longitudinal direction,
<1> to <22>, wherein a ridge extending continuously along the second elastic member is formed between the second elastic member and the strip-shaped adhesive adjacent to the second elastic member. The disposable diaper according to any one of the above.

1 Disposable diapers (pants-type disposable diapers)
DESCRIPTION OF SYMBOLS 10 Absorbent main body 2 Top sheet 3 Back sheet 4 Absorber 5 Exterior body 51 Outer layer sheet 52 Inner layer sheet 53 Elastic member 531 First elastic member 532 Second elastic member 533 Third elastic member 54 Strip adhesive 55 Leg elastic member 56 Exterior Body fusion part 57 End fixing part 58 Absorbent main body side fixing part 59 Cutting part 6 Side cuff 61 Elastic member A for three-dimensional gathering A ventral region, B dorsal region, C inseam region

Claims (8)

A disposable diaper comprising a topsheet, a backsheet, an absorbent main body provided with an absorbent body disposed between both sheets, and an exterior body disposed on the non-skin facing surface side of the absorbent main body,
The exterior body includes an outer layer sheet on the non-skin facing surface side that forms an outer surface of the disposable diaper, an inner layer sheet on the skin facing surface side, and a side of the disposable diaper between the outer layer sheet and the inner layer sheet. An elastic member arranged in a state extending in the direction, and a strip-like adhesive arranged intermittently in the vertical direction along the horizontal direction,
The exterior body includes an expansion / contraction region, and the expansion / contraction region includes a plurality of the elastic members arranged intermittently in the vertical direction of the disposable diaper, and the elastic members adjacent to each other in the vertical direction. One or more strip adhesives are arranged, and the outer layer sheet and the inner layer sheet are fixed through the strip adhesive ,
In the ventral region arranged on the wearer's ventral side, in the region located in the pair of leg openings in the stretchable region, two or more strip adhesives are provided between the elastic members adjacent in the longitudinal direction. Disposable diapers with 4 or fewer .   The disposable diaper according to claim 1, wherein the elastic member is a rubber thread.   The disposable diaper according to claim 1 or 2, wherein the outer layer sheet and the inner layer sheet are fixed via a surface adhesive disposed on a surface of the elastic member in the stretchable region.   The disposable diaper according to any one of claims 1 to 3, wherein an interval between the strip-shaped adhesives adjacent to each other in the vertical direction is the same as a length of each strip-shaped adhesive in the vertical direction.   At least one of the outer layer sheet and the inner layer sheet has the fiber orientation direction of the constituent fibers coincided with the direction in which the strip adhesive is disposed. Disposable diapers.   The disposable diaper according to any one of claims 1 to 5, wherein the stretchable region is formed laterally outward from both side portions along the longitudinal direction of the absorbent main body. In the region where the exterior body overlaps the absorbent main body, each elastic member is divided into a plurality of cut portions, and the expansion and contraction function of the elastic member is reduced.
The disposable diaper according to any one of claims 1 to 6, wherein an interval between the belt-like adhesives adjacent in the vertical direction is shorter than a length in a vertical direction of each of the cut portions. The disposable diaper according to any one of claims 1 to 7, wherein the disposable diaper is a pants-type disposable diaper.

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