JP6297438B2 - Disposable wear - Google Patents

Description

  The present invention relates to a pants-type disposable wearable article.

  2. Description of the Related Art Conventionally, a pants-type disposable diaper having a trunk opening at the upper end and a pair of leg openings at the lower part has been used as one of disposable wearing items that receive excrement from the wearer. In a pants-type disposable diaper, a trunk elastic member is provided along the edge of the trunk opening at the front and rear portions located on the wearer's stomach and back. Moreover, the leg elastic member which follows the edge of a pair of leg part opening is provided in the crotch part located between a front part and a back part. Further, an intermediate elastic member disposed between the body elastic member and the leg elastic member in the vertical direction is provided on the front part and the rear part.

  In the disposable paper diaper of Patent Document 1, a plurality of elastic members that contract in the waist direction at the lower waist are arranged on the user side of the back nonwoven fabric sheet. In the disposable paper diaper, the opacity of the back nonwoven fabric sheet is set to 40% or more, and the thickness of the elastic member is set to 925 dtex or less to make the elastic member difficult to see from the outside. This prevents the wearer from being in danger of excessive tightening or generation of rubber marks.

  The underpants type diaper of patent document 2 is comprised by the exterior body which forms an abdominal side part and a back side part, and the absorptive main body which forms a crotch part. The exterior body is configured by laminating an inner layer material and an outer layer material. In the pants-type diaper, for the purpose of softening the waist area and significantly improving the breathability of the waist area, a one-layer area in which only one layer of the inner layer material exists is disposed in the height direction of the exterior body. A plurality are provided at intervals. In the laminated region where the inner layer material and the outer layer material are laminated, the elastic member is sandwiched between the inner layer material and the outer layer material.

  In the pants-type disposable diaper of Patent Document 3, the outer packaging material joined to the non-skin contact surface side of the absorbent main body is disposed between the outer layer sheet, the inner layer sheet, and the outer layer sheet and the inner layer sheet. 3 sheets. A plurality of elastic members are disposed between the inner layer sheet and the third sheet. By contracting the plurality of elastic members, an elastic stretchable part in which a plurality of large wrinkles extending in the vertical direction appears is formed.

  Patent Document 4 proposes arranging a plurality of linear elastomer films on the outer surface or the inner surface of the exterior sheet in the waist portion or the main body portion of the disposable diaper. Moreover, when an exterior sheet | seat is comprised by two sheets (fiber assembly), arrange | positioning a some linear elastomer film between the said 2 sheets is also proposed.

JP 2002-172137 A JP 2012-139247 A JP 2009-297096 A JP 2012-235806 A

  By the way, since the tendency which asks for the appearance like underwear has strengthened recently about a pants type disposable diaper, it is preferred to reduce visibility of an expansion-contraction member like patent documents 1. However, in the disposable diaper of patent document 1, since the back surface nonwoven fabric sheet which covers the outer side of an expansion-contraction member is one layer, there exists a limit in the visibility reduction of an expansion-contraction member. Moreover, since the opacity of a back surface nonwoven fabric sheet and the thickness of an expansion-contraction member are restrict | limited, the freedom degree of the material selection of a disposable diaper is low. In Patent Document 2, since the outer layer material covering the outer side of the elastic member is one layer in order to remarkably improve the air permeability of the waistline region, the elastic member is relatively easily visible. Similarly, in Patent Document 4, the elastomer film is relatively easy to visually recognize. On the other hand, in the disposable diaper of patent document 3, since the substantially identical 3rd sheet | seat and outer layer sheet | seat are laminated | stacked on the outer side of an elastic member, there exists a possibility that air permeability may fall.

  This invention is made | formed in view of the said subject, and aims at implement | achieving high air permeability while reducing the visibility of an elastic film.

  The invention according to claim 1 is a pants-type disposable wearing article, and has an exterior sheet main body having a trunk opening at the upper end and a pair of leg openings at the lower part, along the edge of the trunk opening. A body elastic member that forms a body part opening gather by being contracted and contracted to the exterior sheet body, and being contracted while being joined to the exterior sheet body along the edges of the pair of leg part openings. A leg elastic member that forms a pair of leg opening gathers, and is joined to the trunk periphery of the exterior sheet main body between the trunk elastic member and the leg elastic member, and shrinks the intermediate gathers A first exterior sheet that covers the front side, the crotch part, and the rear side of the wearer, and a second exterior sheet that covers the inner surface of the first exterior sheet. The intermediate elastic member has a belt-like shape extending in the left-right direction on at least one of the front side and the rear side of the exterior sheet main body, and extends vertically between the first exterior sheet and the second exterior sheet. A plurality of belt-like elastic elements arranged in parallel while being separated from each other, each of the plurality of belt-like elastic elements being a belt-like outer nonwoven fabric extending in the left-right direction and a belt-like shape extending in the left-right direction, and the outer nonwoven fabric The elastic film which opposes the said outer side nonwoven fabric inside is provided.

  The invention according to claim 2 is the disposable wearable article according to claim 1, wherein each outer surface of the plurality of belt-like elastic elements extends in the left-right direction at the center in the vertical direction. An outer surface joining region joined to the first exterior sheet, and an outer surface non-joining region that is not joined to the first exterior sheet on the upper side and the lower side of the outer surface joining region.

  Invention of Claim 3 is a disposable wearing article of Claim 1 or 2, Comprising: Each of these strip | belt-shaped elastic elements is a said 2nd exterior sheet in the upper edge part and lower edge part of an inner surface. The first exterior sheet and the second exterior sheet are joined between the plurality of belt-like elastic elements.

  The invention according to claim 4 is the disposable wearable article according to claim 3, wherein each of the plurality of belt-like elastic elements is disposed between the upper edge portion and the lower edge portion of the inner surface. It is not joined to the second exterior sheet.

  The invention according to claim 5 is the disposable wearable article according to any one of claims 1 to 4, wherein each of the plurality of belt-like elastic elements overlaps the outer nonwoven fabric and the stretched elastic film. , And formed by bonding at a plurality of bonding portions distributed over the entire surface of the elastic film.

  The invention according to claim 6 is the disposable wearable article according to claim 5, wherein an opening is provided in each of the plurality of joint portions.

  A seventh aspect of the present invention is the disposable wearable article according to any one of the first to sixth aspects, further comprising an absorber attached to the inner surface of the exterior sheet.

  In the present invention, the visibility of the elastic film can be reduced and high air permeability can be realized.

It is a front view of the disposable diaper which concerns on one embodiment. It is a rear view of a disposable diaper. It is a top view of the disposable diaper of the unfolded state. It is sectional drawing of a disposable diaper. It is a fragmentary sectional view of a disposable diaper. It is a front view of a strip | belt-shaped elastic element. It is a fragmentary sectional view of other disposable diapers.

  FIG. 1 and FIG. 2 are a front view and a rear view, respectively, of a disposable wearable article 1 according to one embodiment of the present invention (that is, a view of a portion located on the abdomen and back side of the wearer). As shown in FIGS. 1 and 2, the disposable wearable article 1 has a trunk opening 11 at the upper end (that is, the upper end in FIGS. 1 and 2) and a pair of leg openings 12 at the lower part. A pants-type wearing product. The disposable wearing article 1 is a disposable absorbent article that receives excrement from the wearer, and is referred to as “disposable diaper 1” in the following description. In FIG. 1 and FIG. 2, the disposable diaper 1 of the state extended | stretched in the left-right direction is shown.

  Drawing 3 is a top view seen from a wearer side in the state where unfolded disposable diaper 1 was carried out. As shown in FIGS. 1 to 3, the disposable diaper 1 includes an exterior sheet 4 and an absorbent body 20. The exterior sheet 4 has a trunk opening 11 at the upper end and a pair of leg openings 12 at the bottom. The absorbent body 20 is a substantially sheet-like member that is attached on the inner surface (that is, the wearer-side surface) of the exterior sheet 4 and absorbs excrement from the wearer. The exterior sheet 4 includes an exterior sheet main body 40, leg elastic members 43, a trunk elastic member 44, and an intermediate elastic member 45. The exterior sheet body 40 has the body opening 11 described above at the upper end and the pair of leg openings 12 described above at the lower part. The leg elastic member 43, the trunk elastic member 44, and the intermediate elastic member 45 are joined to the exterior sheet main body 40 in an extended state.

  In the disposable diaper 1, the upper part in FIG. 3 covers the front side (abdominal skin) of the wearer, and the lower part in FIG. 3 covers the rear side (skin on the back side) of the wearer. In the following description, the portions of the exterior sheet 4 located on the stomach side and the back side of the wearer are referred to as “front portion 401” and “rear portion 403”, respectively, and the front portion 401 and the rear portion 403 are moved forward. A part that continues from the part 401 and the rear part 403 and covers the crotch part of the wearer is referred to as a “crotch part 402”. In the disposable diaper 1, the exterior sheet 4 includes a front part 401, a crotch part 402, and a rear part 403, and the absorbent body 20 reaches the rear part 403 from the front part 401 of the exterior sheet 4 via the crotch part 402.

  When the disposable diaper 1 is manufactured, the outer sheet 4 is folded together with the absorbent body 20 at the crotch portion 402, and the belt-like portions located on the left and right sides of the front portion 401 when the crotch portion 402 faces downward. The inner surface of 404 and the inner surfaces of the band-shaped portions 405 located on the left and right sides of the rear portion 403 are joined together by heat fusion by heating and pressing. The inner surface of the belt-like portion 404 is a surface that continues laterally from both side ends of the inner surface, which is a surface in contact with the wearer of the front portion 401, and is a surface on the near side in FIG. In addition, the inner surface of the belt-like portion 405 is a surface that is continuous from the both side ends of the inner surface, which is a surface in contact with the wearer of the rear portion 403, to the front side in FIG.

  In this way, by joining the pair of belt-like portions 404 and the pair of belt-like portions 405, as shown in FIGS. 1 and 2, both side ends of the front portion 401 and both side ends of the rear portion 403 are connected. The trunk opening 11 is formed at the upper ends of the front part 401 and the rear part 403. In addition, a pair of leg openings 12 are formed on the left and right sides of the crotch portion 402 below the front part 401 and the rear part 403, and the vertical direction between the trunk part opening 11 and the pair of leg part openings 12. A pair of band-shaped protrusions 13 extending in the direction is formed. Each belt-like protruding portion 13 is a belt-like portion that protrudes laterally from the connection line 400 between the front portion 401 and the rear portion 403.

  FIG. 4 is a cross-sectional view of the disposable diaper 1 cut at the position AA shown in FIG. 3 (that is, the crotch portion 402). In FIG. 4, for convenience of illustration, each component of the disposable diaper 1 is drawn separately (the same applies to FIGS. 5 and 7). As shown in FIGS. 3 and 4, the absorbent body 20 includes a substantially sheet-like main body 2 and a pair of side sheets 3. The pair of side seats 3 is disposed on both side portions of the main body 2 (that is, both sides in the left-right direction perpendicular to the up-down direction) and is provided over the entire length of the main body 2 in the longitudinal direction. As shown in FIG. 4, the main body 2 includes a top sheet 21, an absorbent core 22, and a back sheet 23. The absorbent core 22 is disposed between the top sheet 21 and the back sheet 23. In FIG. 3, the outline of the absorbent core 22 of the absorbent body 20 is drawn with a thick broken line in order to facilitate understanding of the drawing (the same applies to FIGS. 1 and 2).

  As shown in FIG. 3, the width at both ends in the longitudinal direction of the absorbent core 22 is larger than the width at the center in the longitudinal direction of the absorbent core 22. In other words, the absorption core 22 has a so-called hourglass shape. The back sheet 23 in FIG. 4 is bonded onto the exterior sheet 4 by a hot melt adhesive or the like, and thereby the absorbent body 20 is fixed to the exterior sheet 4.

  As shown in FIG. 4, each of the pair of side sheets 3 includes a band-shaped joint portion 33 that is a portion on one side of the fold line 39 provided over the entire length in the longitudinal direction, and the other side of the fold line 39. The side wall part 34 which is a site | part is provided. The pair of joint portions 33 are joined to the upper side (that is, the wearer side) of the main body portion 2 using a hot melt adhesive over substantially the entire length in the longitudinal direction in the vicinity of the side edge of the main body portion 2. The pair of side wall portions 34 are portions that are continuous from the pair of joint portions 33 at the outer edges in the left-right direction of the joint portion 33, which is a fold line 39, and the longitudinal direction of the main body portion 2 on both sides of the main body portion 2. It extends over almost the entire length.

  The pair of side wall portions 34 are overlapped on the joint portion 33 at both end portions in the longitudinal direction, and are fixed on the joint portion 33 by heat fusion bonding, ultrasonic bonding, or adhesion by a hot melt adhesive or the like. A side wall elastic member 35 is joined to the free end of the side wall 34, and a so-called three-dimensional gather is formed when the side wall elastic member 35 contracts.

  FIG. 5 is a partial cross-sectional view of the disposable diaper 1 cut at a position BB shown in FIG. In FIG. 5, the front side of the disposable diaper 1 is shown. The structure of the rear side of the disposable diaper 1 is the same as the structure of the front side shown in FIG. As shown in FIGS. 4 and 5, the exterior sheet body 40 of the exterior sheet 4 includes an outer sheet 41, an inner sheet 42, and an end sheet 48. The outer sheet 41 is the outermost layer sheet of the exterior sheet main body 40. As shown in FIG. 5, the inner sheet 42 and the end sheet 48 are laminated on the inner surface of the outer sheet 41 (that is, on the wearer side) and joined to the outer sheet 41 with a hot melt adhesive or the like. In the exterior sheet main body 40, the outer sheet 41 is a first exterior sheet that covers the front side, the crotch part, and the rear side of the wearer, and the end sheet 48 and the inner sheet 42 are second exterior sheets that cover the inner surface of the first exterior sheet. This is a sheet 49.

  The end sheet 48 is disposed at the front portion 401 and the rear portion 403 that are the front side and the rear side of the exterior sheet main body 40, along the trunk opening 11, and the upper portion of the exterior sheet main body 40 (that is, the disposable sheet worn by the wearer). It is arranged on the upper part of the diaper 1. The inner seat 42 is disposed from the front portion 401 to the rear portion 403 via the crotch portion 402 below the end seat 48. The lower end portion of the end sheet 48 overlaps with the upper end portion of the inner sheet 42 and the upper end portion of the absorbent body 20 in the front portion 401 and the rear portion 403 and is joined to the inner surface of the upper end portion of the absorbent body 20. In other words, the end sheet 48 is fixed by sandwiching the upper end portion of the absorbent body 20 between the outer sheet 41 and the inner sheet 42. As shown in FIG. 3, the end sheet | seat 48 is provided over the whole width | variety of the exterior sheet | seat 4 regarding the left-right direction (namely, horizontal direction in FIG. 3) of the disposable diaper 1. As shown in FIG.

  The top sheet 21 of the absorbent body 20 shown in FIG. 4 is a liquid-permeable sheet material, which quickly captures the moisture of excrement from the wearer and moves it to the absorbent core 22. As the top sheet 21, for example, a liquid-permeable nonwoven fabric (point bond nonwoven fabric, air-through nonwoven fabric, etc.) formed of hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) whose surface is hydrophilically treated with a surfactant. Spunbond nonwoven fabric etc. are used. In addition, as the top sheet 21, a nonwoven fabric (for example, a spunlace nonwoven fabric) formed of hydrophilic fibers such as cellulose, rayon, or cotton may be used.

  The absorbent core 22 absorbs moisture that has passed through the top sheet 21 and quickly fixes it. The absorbent core 22 is, for example, a mixture of a hydrophilic fiber such as pulverized pulp fiber or cellulose fiber and a superabsorbent material such as granular superabsorbent polymer (SAP) or superabsorbent fiber. Is wrapped with a tissue paper, a liquid-permeable nonwoven fabric or the like. Tissue paper, liquid-permeable nonwoven fabric, etc. that wraps hydrophilic fibers are joined to the hydrophilic fibers and water-absorbing material with a hot-melt adhesive, and the shape of the hydrophilic fibers is lost. Prevent later dropout). In the disposable diaper 1 shown in FIG. 1, the absorbent core 22 includes pulp fibers and SAP.

  The back sheet 23 receives the moisture and the like of excrement that has passed through the top sheet 21 and the absorption core 22, and prevents the moisture and the like from exuding to the outside of the main body 2. As the back sheet 23, for example, a water-repellent or liquid-impervious nonwoven fabric (spunbond nonwoven fabric, meltblown nonwoven fabric, SMS (spunbond / meltblown / spunbond) nonwoven fabric, etc.) formed of hydrophobic fibers, water repellency, etc. Alternatively, a liquid-impermeable plastic film is used. When a plastic film is used for the back sheet 23, a plastic film having moisture permeability (breathability) may be used from the viewpoint of preventing the disposable diaper 1 from being stuffy and improving the wearer's comfort. preferable.

  As the sheet body of the side sheet 3, for example, a water-repellent or liquid-impervious nonwoven fabric (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.) formed of hydrophobic fibers is used. As the side wall elastic member 35, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In the disposable diaper 1 shown in FIG. 1, polyurethane yarn is used as the side wall elastic member 35.

  As the outer sheet 41, the inner sheet 42, and the end sheet 48 of the exterior sheet main body 40 illustrated in FIG. 5, for example, similarly to the back sheet 23, a water-repellent or liquid-impervious nonwoven fabric formed of hydrophobic fibers ( Spunbond nonwoven fabrics, melt blown nonwoven fabrics, SMS nonwoven fabrics, air-through nonwoven fabrics, etc.), plastic films, or laminated sheets in which the nonwoven fabrics and plastic films are laminated are used. As the plastic film, a film having moisture permeability (breathability) is preferably used. Further, as the outer sheet 41, the inner sheet 42, and the end sheet 48, similarly to the top sheet 21, a nonwoven fabric formed of hydrophilic fibers or a liquid-permeable nonwoven fabric formed of hydrophobic fibers subjected to hydrophilic treatment is used. It may be used. The outer sheet 41, the inner sheet 42, and the end sheet 48 may be formed of different materials, or may be formed of the same material.

  The outer sheet 41 of the exterior sheet 4 includes a folded portion 46 that is folded to the wearer side at the edge 111 of the trunk portion opening 11. The lower end of the folded portion 46 is located below the upper end of the end sheet 48 and above the upper end of the absorber 20. The upper end portion of the end sheet 48 is sandwiched between the facing portion 47 that is a portion facing the folded portion 46 of the outer sheet 41 and the folded portion 46. The folded portion 46 is joined to the opposing portion 47 and the upper end portion of the end sheet 48. The body elastic member 44 along the edge 111 of the body opening 11 is joined between the folded portion 46 and the facing portion 47 of the exterior sheet main body 40. In the disposable diaper 1 shown in FIGS. 1 and 2, the body elastic member 44 contracts, so that the exterior sheet main body 40 contracts to form a body opening gather that contacts the wearer.

  The leg elastic member 43 is disposed along the edge 121 of the pair of leg openings 12, and is joined between the outer sheet 41 and the inner sheet 42 (see FIG. 5) of the exterior sheet main body 40. The upper end portion of the leg elastic member 43 is joined to the front portion 401 and the rear portion 403, and the portion other than the upper end portion of the leg elastic member 43 is joined to the crotch portion 402 of the exterior sheet main body 40. In the disposable diaper 1, when the leg elastic member 43 contracts, the exterior sheet main body 40 contracts, and a pair of leg gathers in contact with the wearer's leg is formed.

  As the trunk elastic member 44 and the leg elastic member 43, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used. In the disposable diaper 1 shown in FIGS. 1 and 2, the body elastic member 44 and the leg elastic member 43 each include a plurality of elastic yarns (for example, polyurethane yarns) arranged substantially in parallel.

  As shown in FIGS. 1 and 2, the intermediate elastic member 45 is a region between the body elastic member 44 and the upper end portion of the leg elastic member 43 in the vertical direction (hereinafter referred to as “body periphery 407”). Placed in. 1 and 2, the intermediate elastic member 45 is shaded in parallel (the same applies to FIG. 3). The intermediate elastic member 45 extends in the left-right direction and is joined to the exterior sheet main body 40 at the front portion 401 and the rear portion 403. In the disposable diaper 1, when the intermediate elastic member 45 contracts, the exterior sheet main body 40 contracts to form an intermediate gather (so-called body fit gather) that contacts the lower abdomen and the buttocks of the wearer.

  As shown in FIG. 5, the intermediate elastic member 45 includes a plurality of (for example, five) belt-like elastic elements 51. Each of the plurality of belt-like elastic elements 51 is a belt-like member extending in the left-right direction, and is arranged substantially in parallel while being separated from each other in the vertical direction. In the front part 401, the plurality of belt-like elastic elements 51 are arranged between the outer sheet 41 that is the first exterior sheet and the second exterior sheet 49 (the same applies to the rear part 403). In the example illustrated in FIG. 5, all of the plurality of belt-like elastic elements 51 are disposed between the outer sheet 41 and the end sheet 48 and are positioned above the upper end of the absorbent body 20.

  In the exterior sheet 4, some of the plurality of strip-shaped elastic elements 51 are disposed between the outer sheet 41 and the end sheet 48, and the other strip-shaped elastic elements 51 are connected to the outer sheet 41. You may arrange | position between the inner sheets 42. FIG. Further, all of the plurality of belt-like elastic elements 51 may be disposed between the outer sheet 41 and the inner sheet 42, such as when the inner sheet 42 extends to the vicinity of the edge 111 of the trunk opening 11. When all the belt-like elastic elements 51 are disposed between the outer sheet 41 and the inner sheet 42, the end sheet 48 is not necessarily provided.

  In the disposable diaper 1, it is preferable that 3 or more and 7 or less belt-like elastic elements 51 are provided. The width in the vertical direction of each belt-like elastic element 51 is preferably 2 mm or more and 12 mm or less, and more preferably 4 mm or more and 8 mm or less. The vertical width of the region between the two belt-like elastic elements 51 adjacent in the vertical direction (hereinafter referred to as “elastic element absent region”) is preferably 9 mm or more and 19 mm or less, and more preferably 13 mm or more. 17 mm or less. The vertical width of the belt-like elastic element 51 is preferably larger than the vertical width of the elastic element absent region.

  Each of the plurality of belt-like elastic elements 51 includes an outer nonwoven fabric 52 and an elastic film 59. The outer nonwoven fabric 52 is a strip-shaped nonwoven fabric sheet extending in the left-right direction. The elastic film 59 is a strip-shaped plastic film extending in the left-right direction. The outer nonwoven fabric 52 and the elastic film 59 have the same size, for example. The elastic film 59 faces the outer nonwoven fabric 52 on the inner side of the outer nonwoven fabric 52 (that is, on the wearer side). The elastic film 59 is bonded to the outer nonwoven fabric 52.

  FIG. 6 is an enlarged rear view showing one belt-like elastic element 51 provided in the front portion 401. Each of the plurality of belt-like elastic elements 51 includes, for example, an outer nonwoven fabric 52 and an elastic film 59 that is stretched in the longitudinal direction of the belt-like elastic element 51 (that is, the left-right direction of the disposable diaper 1). It is formed by joining the outer nonwoven fabric 52 and the elastic film 59. In FIG. 6, parallel oblique lines are given to a plurality of joint portions 55 in which the outer nonwoven fabric 52 and the elastic film 59 are heat-sealed and joined by embossing. The plurality of joint portions 55 are preferably distributed substantially evenly over substantially the entire surface of the elastic film 59. The outer shape of each joint portion 55 is, for example, a substantially circular shape. The size, shape, and the like of each joint portion 55 may be changed as appropriate. The number, arrangement, and the like of the plurality of joint portions 55 may be changed as appropriate.

  An opening 551 is provided in each of the plurality of joint portions 55. In each joint portion 55, the opening 551 is provided at approximately the center of the joint portion 55. In other words, the substantially annular joint 55 is provided around the opening 551. The opening 551 is a through hole that penetrates the outer nonwoven fabric 52 and the elastic film 59. Preferably, when the outer nonwoven fabric 52 and the elastic film 59 are joined at the plurality of joining portions 55 by embossing, the outer nonwoven fabric 52 and the elastic film 59 are formed at approximately the center of each joining portion 55. It is formed by heat melting. The opening 551 may be formed by other methods.

  As the outer nonwoven fabric 52, for example, a water-repellent or liquid-impervious nonwoven fabric (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, point bond nonwoven fabric, etc.) formed of hydrophobic fibers is used as in the outer sheet 41 and the like. Used. Similarly to the top sheet 21, a non-woven fabric formed of hydrophilic fibers or a liquid-permeable non-woven fabric formed of hydrophilic treated hydrophobic fibers may be used as the outer non-woven fabric 52. In the example shown in FIG. 6, a spunbond nonwoven fabric is used as the outer nonwoven fabric 52. For example, a polyurethane film is used as the elastic film 59.

  The color of the outer nonwoven fabric 52 is preferably the same color or the same color as the outer sheet 41. More preferably, the color of the outer nonwoven fabric 52 is approximately the same color as the outer sheet 41 and is lighter than the outer sheet 41.

  As shown in FIG. 5, each inner surface 512 (that is, a wearer-side surface) of each of the plurality of belt-like elastic elements 51 is bonded to the second exterior sheet 49 via an adhesive layer 57. The adhesive layer 57 includes a plurality of strip-shaped adhesive portions 571 each extending in the left-right direction. In FIG. 5, the belt-like adhesive portion 571 is indicated by a thick solid line. The plurality of strip-shaped adhesive portions 571 are arranged on the outer surface of the second exterior sheet 49 (in the example shown in FIG. 5, the outer surface of the end sheet 48) while being spaced apart in the vertical direction and substantially parallel to each other. Each band-shaped adhesive portion 571 extends over substantially the entire length in the left-right direction between the pair of connection lines 400 in the front portion 401 or the rear portion 403 (that is, the substantially total length in the left-right direction of the front portion 401 or the rear portion 403).

  The adhesive layer 57 is formed, for example, by applying a hot melt adhesive in a stripe shape extending in the left-right direction on the outer surface of the second exterior sheet 49. Formation of the adhesive layer 57 on the second exterior sheet 49 is preferably performed by applying a hot melt adhesive by coater coating. Thereby, the some strip | belt-shaped adhesion part 571 can be formed accurately regarding a shape and the position on the 2nd exterior sheet | seat 49. FIG.

  Each of the plurality of belt-like elastic elements 51 is preferably joined to the second exterior sheet 49 at the upper edge 513 and the lower edge 514 of the inner surface 512. The upper edge portion 513 and the lower edge portion 514 of the belt-like elastic element 51 are joined to the second exterior sheet 49 over substantially the entire length of the belt-like elastic element 51 in the left-right direction. In the example shown in FIG. 5, the upper edge portion 513 and the lower edge portion 514 of the inner surface 512 of each belt-like elastic element 51 are joined to the end sheet 48 via the belt-like adhesive portion 571 of the adhesive layer 57. Each band-like elastic element 51 may be joined to at least one of the inner sheet 42 and the end sheet 48 at the upper edge 513 and the lower edge 514 of the inner surface 512.

  Each of the plurality of belt-like elastic elements 51 is preferably between the upper edge portion 513 and the lower edge portion 514 of the inner surface 512 over the substantially entire length of each belt-like elastic element 51 in the left-right direction. And non-joined. In other words, the intermediate portion 515 between the upper edge portion 513 and the lower edge portion 514 of the inner surface 512 is not joined to the second exterior sheet 49 over substantially the entire length in the left-right direction of the belt-like elastic element 51. In the example shown in FIG. 5, the intermediate portion 515 of the inner surface 512 of each belt-like elastic element 51 faces the outer surface of the end sheet 48, but is not joined to the end sheet 48.

  In the example shown in FIG. 5, the band-shaped adhesive portion 571 that overlaps the lower edge portion 514 of the inner surface 512 of one band-shaped elastic element 51 extends downward from the lower edge of the lower edge portion 514, and It overlaps with the upper edge portion 513 of another belt-like elastic element 51 adjacent below. Further, a band-shaped adhesive portion 571 that overlaps with the upper edge portion 513 of the inner surface 512 of one band-shaped elastic element 51 extends to the upper side from the upper edge of the upper edge portion 513 and is adjacent to the band-shaped elastic element 51 above. It overlaps with the lower edge portion 514 of the belt-like elastic element 51.

  In other words, in each of the two belt-like elastic elements 51 adjacent in the vertical direction, the lower edge portion 514 of the upper belt-like elastic element 51 and the upper edge portion 513 of the lower belt-like elastic element 51 are one band-like adhesive portion. 571 is joined to the second exterior sheet 49. Further, in the region between the two belt-like elastic elements 51 adjacent in the vertical direction, the belt-like adhesive portion 571 exists over substantially the entire surface, and the outer sheet that is the first exterior sheet via the belt-like adhesive portion 571. 41 and the second exterior sheet 49 (the end sheet 48 in the example shown in FIG. 5) are joined.

  Each outer surface 511 (that is, the surface opposite to the wearer) of each of the plurality of belt-like elastic elements 51 is preferably bonded to the outer sheet 41 that is the first exterior sheet via the adhesive layer 58. The adhesive layer 58 includes a plurality of linear adhesive portions 581 respectively corresponding to the plurality of belt-like elastic elements 51. In FIG. 5, the linear adhesive portion 581 is indicated by a thick solid line. The plurality of linear adhesive portions 581 are arranged on the inner surface of the outer sheet 41 so as to be substantially parallel to each other while being separated in the vertical direction. Each linear bonding portion 581 extends over substantially the entire length in the left-right direction between the pair of connection lines 400 in the front portion 401 or the rear portion 403 (that is, the substantially total length in the left-right direction of the front portion 401 or the rear portion 403).

  The adhesive layer 58 is formed, for example, by applying a hot melt adhesive in a stripe shape extending in the left-right direction on the inner surface of the outer sheet 41. The formation of the adhesive layer 58 on the outer sheet 41 is preferably performed by applying a hot melt adhesive by coater coating. Thereby, the some linear adhesion part 581 can be formed accurately regarding a shape and the position on the outer sheet | seat 41. FIG.

  Each linear bonding portion 581 overlaps with a substantially central portion in the vertical direction of the outer surface 511 of the belt-like elastic element 51. The substantially central portion of the outer surface 511 of the belt-like elastic element 51 is joined to the outer sheet 41 by a linear adhesive portion 581. In other words, the outer surface 511 of the belt-like elastic element 51 includes an outer surface bonding region 516 that is bonded to the first exterior sheet. The outer surface bonding region 516 is a substantially linear region extending in the left-right direction at a substantially central portion in the vertical direction of the outer surface 511 of the belt-like elastic element 51. In the outer surface bonding region 516, the hot melt adhesive may be provided in a straight line continuously in the left-right direction, or may be provided intermittently in the left-right direction (for example, in the form of a dot line extending in the left-right direction). In addition, the adhesive layer 58 may include a plurality of strip-shaped adhesive portions each having a strip shape extending in the left-right direction, instead of the plurality of linear adhesive portions 581. In this case, the outer surface bonding area 516 of the outer surface 511 of the band-shaped elastic element 51 is a band-shaped area extending in the left-right direction.

  The outer surface 511 of each belt-like elastic element 51 also includes an outer surface non-bonding region 517 that is not bonded to the first exterior sheet above and below the outer surface bonding region 516. On the outer surface 511 of each belt-like elastic element 51, the outer surface joining region 516 and the outer surface non-joining region 517 are substantially the entire length in the left-right direction between the pair of connecting lines 400 in the front part 401 or the rear part 403 (that is, the front part 401). Or it extends over the substantially entire length of the rear part 403 in the left-right direction). In the example shown in FIG. 5, of the outer surfaces 511 of each belt-like elastic element 51, the entire region excluding the outer surface bonding region 516 is the outer surface non-bonding region 517, and two outer surfaces located above and below the outer surface bonding region 516. A non-bonded region 517 is provided.

  In addition, in the strip | belt-shaped protrusion part 13 (refer FIG.1 and FIG.2) located in the right-and-left both sides of the exterior sheet | seat 4, the right and left of several strip | belt-shaped elastic elements 51 by heat-sealing joining etc. when the strip | belt-shaped protrusion part 13 is formed. Both ends of the direction are joined to the above-described belt-like portions 404 and 405 (see FIG. 3).

  As described above, the disposable diaper 1 shown in FIGS. 1 and 2 includes the exterior sheet main body 40, the leg elastic member 43, the trunk elastic member 44, and the intermediate elastic member 45. 40 includes an outer sheet 41 that is a first exterior sheet, and an inner sheet 42 and an end sheet 48 that are second exterior sheets 49. The intermediate elastic member 45 includes a plurality of belt-like elastic elements 51 on the front side and the rear side of the exterior sheet main body 40 (that is, the front portion 401 and the rear portion 403). Each of the plurality of belt-like elastic elements 51 has a belt-like shape extending in the left-right direction, and is arranged in parallel with each other while being spaced apart in the vertical direction between the first exterior sheet and the second exterior sheet 49. Each of the plurality of belt-like elastic elements 51 includes an outer nonwoven fabric 52 and an elastic film 59. The outer nonwoven fabric 52 and the elastic film 59 each have a strip shape extending in the left-right direction, and the elastic film 59 faces the outer nonwoven fabric 52 inside the outer nonwoven fabric 52.

  In the disposable diaper 1, when the elastic film 59 of each belt-like elastic element 51 contracts, the exterior sheet main body 40 contracts, and an intermediate gather that contacts the wearer's lower abdomen and buttocks is formed. As described above, the outer nonwoven fabric 52 and the outer sheet 41 that is the first exterior sheet are disposed on the outer side of the elastic film 59 (that is, the side opposite to the wearer). The visibility of the film 59 can be reduced. Thereby, it can suppress that a wearer is aware of the clamping | tightening by the elastic film 59 in the trunk periphery part 407. FIG. Moreover, the external appearance of the disposable diaper 1 can be improved by bringing the external appearance of the pants-type disposable diaper 1 closer to the normal underwear pants.

  Further, in the disposable diaper 1, since the plurality of belt-like elastic elements 51 are separated from each other in the vertical direction, high air permeability can be secured in the region between the belt-like elastic elements 51 of the exterior sheet 4. As a result, high air permeability can be realized in the trunk periphery 407 where the intermediate gathers are formed.

  As described above, the outer surface 511 of each of the plurality of belt-like elastic elements 51 is linear or belt-like extending in the left-right direction at a substantially central portion in the vertical direction, and the outer surface bonding region 516 bonded to the outer sheet 41 and the outer surface. The outer sheet | seat 41 and the outer surface non-joining area | region 517 which is non-joining are provided in the upper side and lower side of the joining area | region 516. Thereby, compared with the case where the outer surface 511 of the belt-like elastic element 51 is joined to the outer sheet 41 over substantially the entire surface, the adhesion between the outer sheet 41 and each belt-like elastic element 51 can be suppressed. As a result, the visibility of the elastic film 59 from the outside of the disposable diaper 1 can be further reduced. Moreover, compared with the case where the outer surface 511 of the belt-like elastic element 51 is not joined to the outer sheet 41 over substantially the entire surface, the belt-like elastic element 51 and the exterior sheet main body 40 can be firmly joined.

  In the disposable diaper 1, each of the plurality of belt-like elastic elements 51 is joined to the second exterior sheet 49 at the upper edge 513 and the lower edge 514 of the inner surface 512, and between the plurality of belt-like elastic elements 51, The sheet 41 and the second exterior sheet 49 are joined. Thereby, it can prevent that each strip | belt-shaped elastic element 51 slip | deviates to an up-down direction. In addition, it is possible to realize strong bonding between the outer sheet 41 and the second exterior sheet 49. Further, as described above, when the bonding between the belt-like elastic element 51 and the second exterior sheet 49 and the bonding between the outer sheet 41 and the second exterior sheet 49 are performed by an adhesive such as a hot melt adhesive, The adhesive can be easily applied.

  In the example shown in FIG. 5, the outer sheet 41 and the second exterior sheet 49 are joined over the substantially entire surface between the plurality of belt-like elastic elements 51 in the waistline portion 407. The exterior sheet 49 may be partially joined between the plurality of belt-like elastic elements 51. For example, a belt-like adhesive portion 571 that overlaps with the lower edge portion 514 of one belt-like elastic element 51, and a belt-like adhesive portion 571 that overlaps with the upper edge portion 513 of another belt-like elastic element 51 adjacent to the belt-like elastic element 51 below. May be spaced apart in the vertical direction. In other words, an adhesive absent portion where no adhesive is provided may be disposed between two belt-like adhesive portions 571 adjacent in the vertical direction. By providing the adhesive absent portion, the air permeability of the exterior sheet 4 in the waistline portion 407 can be further improved.

  In the disposable diaper 1, each of the plurality of belt-like elastic elements 51 is not joined to the second exterior sheet 49 at an intermediate portion 515 between the upper edge portion 513 and the lower edge portion 514 of the inner surface 512. Thereby, when the elastic film 59 shrink | contracts, shrinkage | contraction of the 2nd exterior sheet | seat 49 which touches a wearer's skin is suppressed. As a result, the wearing feeling of the disposable diaper 1 can be improved. Moreover, when the strip | belt-shaped elastic element 51 is joined to the exterior sheet main body 40 with adhesive agents, such as a hot-melt-adhesive agent, the usage-amount of the adhesive agent in the trunk periphery part 407 can be reduced. As a result, even higher air permeability can be realized in the waist portion 407.

  As described above, each belt-like elastic element 51 is formed by overlapping the outer nonwoven fabric 52 and the stretched elastic film 59 and joining them at a plurality of joint portions 55 distributed over the entire surface of the elastic film 59. . Thereby, compared with the case where the substantially whole surface of the elastic film 59 is joined to the outer nonwoven fabric 52, it is possible to suppress the expansion and contraction of the elastic film 59 from being inhibited by the outer nonwoven fabric 52. Further, by providing the opening 551 in each of the plurality of joint portions 55, the air permeability of the exterior sheet 4 in the waistline portion 407 can be further improved.

  FIG. 7 is a partial sectional view of another preferred disposable diaper 1a and corresponds to FIG. In FIG. 7, the front side of the disposable diaper 1a is shown. The structure of the rear side of the disposable diaper 1a is the same as the structure of the front side shown in FIG. In the disposable diaper 1a, the intermediate elastic member 45 includes a plurality of belt-like elastic elements 51a having a structure different from that of the belt-like elastic element 51 shown in FIG. The other structure of the disposable diaper 1a is substantially the same as the structure of the disposable diaper 1 shown in FIG. 1 thru | or FIG. 6, and attaches | subjects the same code | symbol to the corresponding structure in the following description.

  As shown in FIG. 7, in the disposable diaper 1a, similarly to the disposable diaper 1 shown in FIG. 5, an elastic film 59 is arranged on the inner side of the outer nonwoven fabric 52 (that is, the wearer side) in each belt-like elastic element 51a. The outer nonwoven fabric 52 and the elastic film 59 are joined. In the disposable diaper 1a, the vertical width of the elastic film 59 of each band-shaped elastic element 51a is smaller than the vertical width of the outer nonwoven fabric 52. In each belt-like elastic element 51 a, the upper edge of the elastic film 59 is positioned below the upper edge of the outer nonwoven fabric 52. Further, the lower edge of the elastic film 59 is positioned above the lower edge of the outer nonwoven fabric 52. In other words, the upper edge portion and the lower edge portion of the outer nonwoven fabric 52 extend to the upper side and the lower side of the elastic film 59, respectively. The upper edge 513 and the lower edge 514 of the inner surface 512 (that is, the wearer-side surface) of each belt-like elastic element 51a are the upper edge and the lower edge of the inner surface of the outer nonwoven fabric 52, respectively. The joining mode of the outer nonwoven fabric 52 and the elastic film 59 in the belt-like elastic element 51a is the same as the joining manner of the outer nonwoven fabric 52 and the elastic film 59 in the belt-like elastic element 51 (that is, by a plurality of joint portions 55 having openings 551). Bonding).

  As shown in FIG. 7, the inner surfaces 512 of the plurality of belt-like elastic elements 51 a are joined to the end sheet 48 of the second exterior sheet 49 via the adhesive layer 57. The adhesive layer 57 includes a plurality of strip-shaped adhesive portions 571 each extending in the left-right direction. The plurality of band-shaped adhesive portions 571 are arranged on the outer surface of the second exterior sheet 49 (in the example shown in FIG. 7, the outer surface of the end sheet 48) while being spaced apart in the vertical direction and substantially parallel to each other. Each of the plurality of belt-like elastic elements 51a is preferably attached to the second exterior sheet 49 at the upper edge 513 and the lower edge 514 of the inner surface 512 (that is, the upper edge and the lower edge of the inner surface of the outer nonwoven fabric 52). Be joined. In the example shown in FIG. 7, the elastic films 59 of the plurality of band-shaped elastic elements 51 a are located between the plurality of band-shaped adhesive portions 571 and are not joined to the second exterior sheet 49. Moreover, in the disposable diaper 1a, each outer surface 511 of the some strip | belt-shaped elastic element 51a is non-joining with the outer side sheet | seat 41. FIG.

  In the disposable diaper 1a shown in FIG. 7 as well, the outer nonwoven fabric 52 and the outer sheet 41 as the first exterior sheet are arranged outside the elastic film 59 (that is, on the side opposite to the wearer), as in the disposable diaper 1 described above. Therefore, the visibility of the elastic film 59 from the outside of the disposable diaper 1a can be reduced. Thereby, it can suppress that a wearer is aware of the clamping | tightening by the elastic film 59 in the trunk periphery part 407. FIG. Moreover, the appearance of the pants-type disposable diaper 1a can be brought close to the pants that are normal underwear, and the appearance of the disposable diaper 1a can be improved.

  Various changes can be made with respect to the disposable diapers 1 and 1a described above.

  For example, in the belt-like elastic elements 51 and 51a, the opening 551 is not necessarily provided in each joint portion 55. The outer nonwoven fabric 52 and the elastic film 59 may be joined by various joining methods other than embossing. For example, the outer nonwoven fabric 52 and the elastic film 59 may be bonded by a hot melt adhesive. Further, in the belt-like elastic elements 51 and 51a, the elastic film 59 does not need to be joined to the outer nonwoven fabric 52 at the plurality of joining portions 55 distributed over substantially the entire surface of the elastic film 59. For example, a hot melt adhesive may be applied over substantially the entire outer surface of the elastic film 59, and the outer surface of the elastic film 59 may be bonded to the outer nonwoven fabric 52 over substantially the entire surface.

  The plurality of belt-like elastic elements 51, 51 a may be provided on at least one of the front side and the rear side (that is, the front portion 401 and the rear portion 403) of the exterior sheet main body 40. Thereby, the visibility of the elastic film 59 from the outer side of the disposable diaper 1, 1a can be reduced similarly to the above-mentioned example. As a result, it is possible to suppress the wearer from being aware of tightening by the elastic film 59 in the waistline portion 407. Moreover, the external appearance property of the pants-type disposable diapers 1, 1a can be improved.

  The joining between the first exterior sheet and the second exterior sheet 49 and the joining between the belt-like elastic elements 51 and 51a and the exterior sheet main body 40 are not necessarily limited to the adhesion by the hot melt adhesive, and other various joinings. It may be performed by a method. Further, the inner surfaces 512 of the belt-like elastic elements 51 and 51a do not necessarily have to be joined to the second exterior sheet 49 at the upper edge portion 513 and the lower edge portion 514. For example, the second exterior sheet 49 at the intermediate portion 515. It may be joined to the second exterior sheet 49 over substantially the entire inner surface 512.

  The structure of the disposable diapers 1 and 1a may be applied to disposable wearing items other than disposable diapers. For example, the structure of the disposable diaper 1, 1 a is applied to a disposable wear product in which an attachment portion to which an absorbent device such as an absorbent pad is detachably attached is attached on the inner surface of the exterior sheet 4 instead of the absorbent body 20. . The attachment portion is a sheet member formed of, for example, a water-repellent or liquid-impervious sheet, and is a hook-and-loop fastener that can be attached to the absorbent device, or an end portion of the absorbent device that covers the absorbent device. It is provided with the covering gather which restricts.

  The configurations in the above-described embodiments and modifications may be combined as appropriate as long as they do not contradict each other.

DESCRIPTION OF SYMBOLS 1,1a Disposable diaper 11 trunk | drum opening 12 leg opening 20 absorber 40 exterior sheet main body 41 outer sheet 42 inner sheet 43 leg elastic member 44 trunk elastic member 45 intermediate elastic member 48 end sheet 49 2nd exterior sheet 51, 51a Band-like elastic element 52 Outer non-woven fabric 55 Bonding portion 59 Elastic film 111 Edge (for trunk opening) Edge 121 (for leg opening) 407 Trunk circumference 511 Outer surface (for band-like elastic element) 512 Inner surface 513 (for band-like elastic element) Upper edge portion 514 (of the belt-like elastic element) Lower edge portion 516 (of the belt-like elastic element) 516 outer surface bonding region 517 outer surface non-bonding region 551 opening

Claims (7)

It is a pants-type disposable wear item,
An exterior sheet body having a trunk opening at the upper end and a pair of leg openings at the bottom;
A body elastic member that forms a body opening gather by being contracted while being joined to the exterior sheet main body along the edge of the body opening;
Leg elastic members that form a pair of leg opening gathers by being joined and contracted along the edges of the pair of leg opening,
An intermediate elastic member that forms an intermediate gather by being joined and contracted to the trunk periphery of the exterior sheet main body between the trunk elastic member and the leg elastic member;
With
The exterior sheet body is
A first exterior sheet covering the front side, the crotch portion, and the rear side of the wearer;
A second exterior sheet covering an inner surface of the first exterior sheet;
With
In at least one of the front side and the rear side of the exterior sheet main body, the intermediate elastic members each have a strip shape extending in the left-right direction, and are spaced apart from each other in the vertical direction between the first exterior sheet and the second exterior sheet. A plurality of belt-like elastic elements arranged in parallel while
Each of the plurality of belt-like elastic elements is
A strip-shaped outer nonwoven fabric extending in the left-right direction;
An elastic film that extends in the left-right direction and faces the outer nonwoven fabric inside the outer nonwoven fabric;
A disposable wearing article comprising: The disposable wearing article according to claim 1,
Each outer surface of the plurality of belt-like elastic elements is
A linear or belt-like region extending in the left-right direction at the center in the up-down direction, and an outer surface joining region joined to the first exterior sheet;
An outer non-joining region that is non-joining with the first exterior sheet on the upper and lower sides of the outer joining region;
A disposable wearing article comprising: The disposable wearable article according to claim 1 or 2,
Each of the plurality of belt-like elastic elements is joined to the second exterior sheet at the upper edge portion and the lower edge portion of the inner surface,
The disposable wearing article, wherein the first exterior sheet and the second exterior sheet are joined between the plurality of belt-like elastic elements. The disposable wearing article according to claim 3,
Each of the plurality of belt-like elastic elements is non-joined with the second exterior sheet between the upper edge portion and the lower edge portion of the inner surface. The disposable wearable article according to any one of claims 1 to 4,
Each of the plurality of belt-like elastic elements is formed by stacking the outer nonwoven fabric and the stretched elastic film, and joining them at a plurality of joints distributed over the entire surface of the elastic film. Disposable wearing items. The disposable wearing article according to claim 5,
A disposable wearable article, wherein an opening is provided in each of the plurality of joints. The disposable wearing article according to any one of claims 1 to 6,
A disposable wearable article further comprising an absorber attached to the inner surface of the exterior sheet main body.

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