JP6072555B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper, and more particularly to the diaper effective for preventing leakage of bodily fluid from the rear waistline region.

  In the disposable diaper, in addition to the waistline elastic member attached along the edge of the opening so as to circulate around the waistline opening, the disposable diaper has an auxiliary elastic member that extends in the waistline direction below the waistline elastic member. Those are well known in the art. This auxiliary elastic member acts so that the absorbent body incorporated in the diaper is in close contact with the body of the diaper wearer, or reduces the slack on the side of the worn diaper so as not to stand out. It is useful in that.

  For example, the disposable diaper described in Japanese Patent Laid-Open No. 4-166150 (Patent Document 1) is of a pants type, and includes an elastic member extending over the entire periphery of the waist opening and the entire periphery of the periphery of the leg opening. An elastic member that forms a substantially continuous gather around the waist is provided so as to circulate around the waist across the absorber.

  In the disposable pants described in Japanese Patent Laid-Open No. 7-236650 (Patent Document 2), a plurality of elastic members extend in the lateral direction, that is, the waistline direction, between the waist opening and the leg opening. The elastic member is in a non-extended state at the abdomen-side central portion where the absorber is disposed, and is in an extended state at the left and right side portions of the central portion. Therefore, the absorber does not have the contracting action of the elastic member.

JP-A-4-166150 JP 7-236650 A

  In a conventional disposable diaper, when an elastic member extending in the waistline direction extends across the absorber, when the elastic member contracts, a large number of gathers extending in the vertical direction of the diaper are generated in the absorber. Sometimes. When a diaper is worn, there may be a gap between the skin and the diaper along the gather, and body fluid may leak from the gap. For example, in a baby diaper with a lot of time to be in a supine position, if gathers occur in the part of the absorber located in the rear waist area of the diaper, urine leaks through the gathers and leaks to the infant's back There is.

  Moreover, even if the elastic member crosses the absorbent body, if the elastic member is in an unstretched state, the elastic member does not cause gathering in the absorbent body, and the inner surface of the rear waistline region of the diaper is worn by the wearer. Adheres well to the buttocks. However, even in such a case, a gap is easily generated between the crack of the wearer's buttocks and the inner surface of the diaper, and urine and loose stool are likely to leak from the gap.

  Therefore, the present invention has an object to provide an improved disposable diaper so that leakage of urine and soft stool generated in this way can be suppressed.

  In order to solve the above problems, the present invention is directed to a front and rear direction and a lateral direction corresponding to a front and rear direction and a lateral direction in a diaper wearer. A front panel that forms at least the crotch region and a rear panel that forms a rear waistline region have an inner surface that faces the skin of the diaper wearer, and an outer surface that faces the wearer's clothes, and the crotch of the front panel In the region, the absorbent body is interposed between the inner surface and the outer surface, and the outer surface at the rear end portion of the front panel is a disposable diaper joined to the inner surface of the rear panel.

The features of the present invention in this diaper are as follows . Prior Symbol absorber has a rear end edge to said rear end of said front panel, one of said outer surface and said absorbent body in the rear end portion of the front panel, the central portion of the transverse direction the absorbent unbonded state near to the rear panel so that it can in the thickness direction of the body to vary the distance between the rear panel is, the outer surface and the absorbent body before SL front panel also, the lateral in both outer portion adjacent to the central portion in the direction, the state near spaced non bonded to the inner surface of the rear panel is, prior SL after the panel is resiliently into said lateral faces the said central portion A central elastic region capable of shrinking and reducing the size of the central portion in the lateral direction, and both outer portions on the side of the central elastic region without elastically contracting in the lateral direction. Small in To have a non-elastic region that does not reduce the dimension in the transverse direction of the Kutomo portion, the above inner surface is bonded on the front panel the outer surface and the rear panel of the said rear portion of said front panel The central portion extends further rearward from the rear edge of the absorber and reaches the rear edge of the front panel located behind the rear edge .
The absorber has a rear edge at the rear end portion of the front panel, and either the outer surface of the rear end portion of the front panel or the absorber has a central portion in the lateral direction as the absorber. The outer surface of the front panel and the absorber are also in the lateral direction in the non-bonded state with respect to the rear panel so that the distance from the rear panel can be changed in the thickness direction. In both outer portions adjacent to the central portion, the rear panel is in a state of being non-separably bonded to the inner surface of the rear panel, and the rear panel is elastically contracted in the lateral direction so as to face the central portion. A central elastic region capable of reducing the size of the portion in the lateral direction, and a small amount in each of the outer portions on the side of the central elastic region and without elastically contracting in the lateral direction. The outer surface of the front panel and the inner surface of the rear panel are joined so as to have at least a portion of the inelastic region that does not reduce the size in the lateral direction, and the central elastic region is formed in the lateral direction. A plurality of thread-like central elastic members extending in parallel with each other are formed by being attached to the rear panel in an expanded state and contractible, and the plurality of central elastic members are directed from the rear waistline region to the crotch region It is arranged in the direction, the length which can be shrunk in the horizontal direction is the same, and the shrinking force increases as it advances in the direction .
The absorber has a rear edge at the rear end portion of the front panel, and either the outer surface of the rear end portion of the front panel or the absorber has a central portion in the lateral direction as the absorber. The outer surface of the front panel and the absorber are also in the lateral direction in the non-bonded state with respect to the rear panel so that the distance from the rear panel can be changed in the thickness direction. In both outer portions adjacent to the central portion, the rear panel is in a state of being non-separably bonded to the inner surface of the rear panel, and the rear panel is elastically contracted in the lateral direction so as to face the central portion. A central elastic region capable of reducing the size of the portion in the lateral direction, and a small amount in each of the outer portions on the side of the central elastic region and without elastically contracting in the lateral direction. The outer surface of the front panel and the inner surface of the rear panel are joined so as to have at least a portion of the inelastic region that does not reduce the size in the lateral direction, and the central elastic region is formed in the lateral direction. A plurality of thread-like central elastic members extending in parallel with each other are formed by being attached to the rear panel in an expanded state and contractible, and the plurality of central elastic members are directed from the rear waistline region to the crotch region The lengths that can be shrunk in the horizontal direction are the same, and the shrinkage rate increases as the direction proceeds.
The absorber has a rear edge at the rear end portion of the front panel, and either the outer surface of the rear end portion of the front panel or the absorber has a central portion in the lateral direction as the absorber. The outer surface of the front panel and the absorber are also in the lateral direction in the non-bonded state with respect to the rear panel so that the distance from the rear panel can be changed in the thickness direction. In both outer portions adjacent to the central portion, the rear panel is in a state of being non-separably bonded to the inner surface of the rear panel, and the rear panel is elastically contracted in the lateral direction so as to face the central portion. A central elastic region capable of reducing the size of the portion in the lateral direction, and a small amount in each of the outer portions on the side of the central elastic region and without elastically contracting in the lateral direction. The outer surface of the front panel and the inner surface of the rear panel are joined so as to have an inelastic region that does not reduce the dimension in the lateral direction of at least a part, and the crotch region of the front panel is the Each of the leg elastic members extending in the front-rear direction is attached to the side edge portions on both sides in the lateral direction, and each of the front and rear end portions in a mode in which the leg elastic members are not elastically contracted, and the front and rear ends An intermediate portion that is elastically contractible between the portions, and the central elastic region is in a position that does not intersect the intermediate portion even if it is translated in the lateral direction. To do.

In one embodiment of the present invention, the central portion when the central elastic region is in a tensioned state in the lateral direction has a dimension in the lateral direction of at least 20 mm, and from the rear edge of the absorber. the longitudinal dimension extending toward front along the absorbent body is at least 20 mm.

In another embodiment of the present invention, at least the portion of the outer portions has the lateral dimension of at least 20 mm.

According to still another embodiment of the invention, a plurality of the central elastic member is a contraction rate is the same, retractable length as one proceeds to the direction is longer.

  In another embodiment of the present invention, the central elastic region is formed by attaching a single sheet-like elastic member to the rear panel in a state of extending in the lateral direction.

  In another embodiment of the present invention, in the central portion, the absorber is located on both sides of the portion on the center line with the thickness of the portion on the center line bisecting the lateral dimension. It is formed thinner than the thickness of the part.

  In another embodiment of the present invention, in the central portion, the absorber extends along the center line to a portion on the center line that bisects the lateral dimension. A slit-shaped through-hole penetrating the core material in the thickness direction is formed.

  In another embodiment of the present invention, the rear panel is formed such that a lateral portion located outside the front panel in the lateral direction is elastically contractible in the lateral direction, and the lateral portion is And the central elastic region is in a contracted state, the central elastic region does not expand in the lateral direction even if the lateral portion is expanded in the lateral direction.

  In another embodiment of the present invention, the diaper includes a front waistline panel that forms the front waistline region, a rear waistline panel that forms the rear waistline region, and a crotch panel that forms the crotch region. The crotch panel forms the front panel, and the rear waistline panel forms the rear panel.

  In another embodiment of the present invention, the diaper includes an integrated panel in which the front waistline region and the crotch region are integrated, and a rear waistline panel that forms the rear waistline region. The integrated panel forms the front panel, and the rear waistline panel forms the rear panel.

  In another embodiment of the present invention, the diaper is for infants.

  In another embodiment of the present invention, the diaper is either a pant diaper or an open diaper.

  In the disposable diaper according to the present invention, the central portion of the front panel of the front panel and the rear panel that are joined to overlap each other is not joined to the rear panel, and the rear panel faces the central portion. Has a central elastic region. The central elastic region acts to reduce the lateral dimension of the central portion of the front panel when it elastically contracts laterally. The central portion with the reduced size is deformed so as to protrude toward the inside of the diaper. The deformed central portion can block the diaper wearer's buttocks, stop the flow of urine and loose stool through the diaper, and suppress their leakage in the diaper.

The figure which shows the front waist area of the underpants type disposable diaper which is one embodiment of invention. The perspective view which shows the back waist area of the diaper of FIG. FIG. 3 is a partial cutaway view of the diaper of FIG. 2. IV-IV sectional view taken on the line of FIG. The exploded assembly figure of the diaper of FIG. The figure which expands and shows the part VI of FIG. The figure which illustrates a part of manufacturing process of a back waistline panel. The figure similar to FIG. 6 which shows an example of an embodiment. The figure similar to FIG. 6 which shows an example of an embodiment. The figure similar to FIG. 2 which shows an example of an embodiment. The figure similar to FIG. 5 which shows an example of an embodiment. The perspective view and disassembled assembly drawing of the open diaper which are an example of an embodiment. The figure similar to FIG. 4 about the open diaper which is an example of an embodiment. The figure which shows another example about the open diaper which is an example of an embodiment.

  The details of the disposable diaper according to the present invention will be described with reference to the accompanying drawings.

  1 and 2 are a perspective view showing a front side of a pants-type diaper 1 which is an example of a disposable diaper, that is, a side of a waistline region 2, and a perspective view showing a rear side, that is, a side of a back waistline region 3, In the wearer (not shown), the vertical direction, the horizontal direction, the front-rear direction, and the vertical direction, the horizontal direction, and the front-rear direction of the diaper 1 corresponding to those directions are indicated by double-headed arrows A, B, and C. Has been. The diaper 1 includes a front waistline panel 12 that forms a front waistline region 2, a rear waistline panel 13 that forms a rear waistline region 3, and a crotch panel 14 that forms a crotch region 4, and In the diaper 1, the postscript elastic member included in these panels 12, 13, and 14 is in a relaxed state. Panels 12, 13, and 14 have inner surfaces 12a, 13a, and 14a facing the diaper wearer's skin, and outer surfaces 12b, 13b, and 14b facing the wearer's clothes. The front waistline panel 12 and the rear waistline panel 13 have side edge portions 12c and 13c that overlap each other in the form of a palm and are joined together to form a waistline opening 16. The crotch panel 14 hangs down from the front and rear waistline panels 12 and 13 and has leg openings 17 formed on both sides in the lateral direction B of the diaper 1.

  Each of the front and rear waist panels 12 and 13 is elastically elastic in the waist direction by contracting thread-like elastic members 33 and 37 extending along the periphery of the waist opening 16, that is, extending in the waist direction. A large number of gathers 18 and 19 that can be repeatedly expanded and contracted are formed. In other words, the part where the gathers 18 are formed in the front waistline panel 12 and the part where the gathers 19 are formed in the rear waistline panel 13 are elastic regions in which elastic expansion and contraction can be repeated in the waistline direction. is there. Each of the front and rear waist panels 12 and 13 is also formed with inelastic regions 21 and 22 in the center in the waist direction. The inelastic regions 21 and 22 do not elastically expand or contract in the waistline direction, and the outer surface 12b in the inelastic regions 21 and 22 is preferable in the front waistline panel 12 and the rear waistline panel 13 of the preferred diaper 1. , 13b is smooth. However, in the rear waistline panel 13, a central elastic region 24 is formed in the center of the inelastic region 22 in the waistline direction. The central elastic region 24 is an elastic region in which elastic expansion and contraction in the waistline direction can be repeated, and has a plurality of gathers 25 extending in the longitudinal direction A. The crotch panel 14 is formed with a large number of gathers 26 capable of repeating elastic expansion and contraction in the circumferential direction of the leg opening 17. In the present invention, the front waistline panel 12 and the crotch panel 14 may be collectively referred to as a front panel, and the rear waistline panel 13 may be referred to as a rear panel.

  3 and 4, FIG. 3 is a partially broken view of the diaper 1 of FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. In FIG. 3, the front waistline panel 12 is formed by interposing a plurality of thread-like elastic members 33 extending in the waistline direction between an inner sheet 31 and an outer sheet 32 in an expanded state. In the diaper 1 in a natural state as in the illustrated example, a group of gathers 18 is formed by the elastic member 33 contracting. The rear waistline panel 13 is formed by interposing a plurality of thread-like elastic members 37 extending in the waistline direction between the inner sheet 35 and the outer sheet 36 in an expanded state. A group of gathers 19 is formed in the rear waistline panel 13 by the elastic member 37 contracting. In the central elastic region 24 of the rear waistline panel 13, a plurality of thread-like central elasticity extending in a stretched state in the waistline direction intersecting with a center line 38 (see FIG. 5) that bisects the size of the rear waistline panel 13 in the waistline direction. A member 39 is interposed between the inner sheet 35 and the outer sheet 36, and the central elastic member 39 contracts to form a group of gathers 25 on the inner sheet 35 and the outer sheet 36. A non-elastic region 22 is formed around the central elastic region 24. The non-elastic region 22 includes the inner sheet 35 and the outer sheet 36, but may not include any of the elastic members 37 and 39, or may include at least one of the elastic members 37 and 39. However, when the elastic member is in a relaxed state or is not elastically stretchable, it does not elastically expand or contract. Although not shown, the inner sheet 31 and the outer sheet 32 and the inner sheet 35 and the outer sheet 36 can be bonded with a hot melt adhesive applied in an appropriate pattern such as a dot shape or a bead shape. Alternatively, it can be joined by embossing under heating. The elastic member 33 is repeatedly contracted and expanded on the inner surface sheet 31 and / or the outer sheet 32 by the hot melt adhesive applied thereto or the hot melt adhesive applied to at least one of the inner sheet 31 and the outer sheet 32. The elastic members 37 and 39 are joined to each other by the hot melt adhesive applied to them or the inner surface sheet 35 and the inner surface sheet 35 by the hot melt adhesive applied to at least one of the inner surface sheet 35 and the outer surface sheet 36. In other words, the outer sheet 36 is joined in a state where the shrinkage and the extension can be repeated. However, the ends of the elastic members 33, 37, and 39 are not stretched or contracted when the diaper 1 is attached or detached.

  The crotch panel 14 hangs down from the front end portion 14c joined to the inner surface 12a of the front waistline panel 12, the rear end portion 14d joined to the inner surface 13a of the rear waistline panel 13, the front waistline panel 12 and the rear waistline panel 13. And an intermediate portion 14e. The front end portion 14 c is joined to the front waistline panel 12 via the first hot melt adhesive 41, and the rear end portion 14 d is joined to the rear waistline panel 13 via the second hot melt adhesive 42. However, in the rear end portion 14d, the central portion 45 of the crotch panel 14 facing the central elastic region 24 in the rear waistline panel 13 is in a non-bonded state with respect to the rear waistline panel 13, and in the thickness direction of the absorber 51 described later The rear waistline panel 13 can be separated and approached. In a preferred embodiment of the present invention, the central portion 45 in the non-joined state is viewed from the rear end edge 51b (see FIG. 5) of the post-absorbent body 51 included in the crotch panel 14 when viewed in the longitudinal direction A of FIG. It goes downward and extends at least to the central elastic member 39e at the lower end of the central elastic region 24. Further, in a further preferred embodiment of the present invention, the non-joined central portion 45 extends upward beyond the rear end edge 51b of the absorbent body 51 to the rear end edge 14g of the crotch panel 14 as shown in the drawing. On the other hand, it extends downward to the lower end edge 13f of the rear waistline panel 13 in the downward direction beyond the central elastic member 39e. In FIG. 3, such a central portion 45 is reduced in size in the lateral direction B due to the contraction of the central elastic region 24 accompanying the contraction of the central elastic member 39, and toward the inside of the diaper 1, that is, the diaper wearer's. The protruding tip portion 45a is deformed so as to protrude toward the skin, and can enter the crack of the butt. The center portion 45 extends from the rear end edge 14g of the crotch panel 14 to the lower end edge 13f of the rear waistline panel 13 in the center portion 45 where the rear waistline panel 13 and the crotch panel 14 are joined together. It is preferable in reducing the factor that hinders deformation of the portion 45 so as to protrude. Note that the center line 38 in FIG. 3 is also a center line that bisects the dimension of the diaper 1 in the lateral direction B.

  5 and 6, FIG. 5 shows that the side edges 12 c and 13 c of the front waistline panel 12 and the rear waistline panel 13 shown in FIG. It is a perspective view of the extension diaper 1a obtained by extending | stretching to C, The exploded assembly drawing about the extension diaper 1a is also shown collectively. FIG. 6 is an enlarged view of a portion VI in FIG. In the extended diaper 1a, all elastic members used in the extended diaper 1a are stretched and are in a tension state, and gathers (see FIG. 1) generated by the contraction of the elastic member are in a state of disappearance. Further, in the exploded view of FIG. 5, the front waistline panel 12, the rear waistline panel 13, and the crotch panel 14 are partially broken to show constituent members of each panel.

  In FIG. 5, the crotch panel 14 includes a body fluid-absorbing absorber 51, a liquid-permeable inner surface sheet 52 that covers an inner surface of the absorber 51, that is, a surface facing the skin of the diaper wearer, and an absorber 51. The first outer surface sheet 53 and the second outer surface sheet 54 overlap each other so as to cover the outer surface of the diaper, that is, the surface facing the clothes of the diaper wearer. The first outer surface sheet 53 is liquid-impermeable, and the second outer sheet 54 is preferably air-permeable, more preferably water-repellent and water-repellent, and still more preferably liquid-impervious to liquid. Here, the poor liquid permeability of the second outer sheet means that the performance of suppressing the permeation of liquid components such as urine in excrement is not as high as that of the first outer sheet. The inner sheet 52 and the first outer sheet 53 extend from the peripheral edge of the absorber 51 and overlap each other, and are joined to each other via a joining means (not shown) such as hot melt adhesive or embossing. The second outer sheet 54 is bonded to the first outer sheet 53 via a bonding means (not shown) such as hot melt adhesive or embossing. The second outer surface sheet 54 is also a hot-melt adhesive with respect to the portion of the inner surface sheet 52 that extends from the first outer surface sheet 53 in each of both sides in the lateral direction B. (Not shown). Further, the second outer surface sheet 54 is overlapped by overlapping the portions extending from the inner surface sheet 52 on both sides in the lateral direction B into a Z-shape or an inverted Z-shape. The overlapping second outer sheet 54 and the overlapping second outer sheet 54 and inner sheet 52 cannot be separated from each other via a hot melt adhesive (not shown) at the front end portion 14 c and the rear end portion 14 d of the crotch panel 14. In the diaper 1 of FIG. 1, the leakage barrier 56 can be formed by standing upward so as to release the mutual overlap. . An elastic member 57 extending in the front-rear direction C is attached to the leakage breaker 56 in an extended state in order to allow such standing. Moreover, the leg periphery elastic member 58 (refer FIG. 3) for elastically contracting the peripheral part of the leg periphery opening 17 in the diaper 1 is attached to the part used as the base part of the breakwater 56 in the expansion | extension state. . The crotch panel 14 is formed to be symmetric with respect to the center line 38.

  Also in FIG. 5, the rear waistline panel 13 is formed symmetrically with respect to the center line 38. The elastic member 37 extending in the waistline direction, that is, in the lateral direction B in FIG. 5, includes a rear waistline elastic member 37a extending in a stretched state from one side edge 13c to the other side edge 13c, and the side edge 13c. And a rear waistline auxiliary elastic member 37b extending from each to the inelastic region 22 in an extended state. When the rear waistline elastic member 37a contracts, the rear waistline panel 13 acts to form a gather 19 in a portion of the rear waistline panel 13 that becomes the peripheral edge of the waistline opening 16 (see FIGS. 2 and 3). When the rear waistline auxiliary elastic member 37b contracts, the gathers 19 are formed in the side portion 13g located between each of the side edge portions 13c and the inelastic region 22 in the rear waistline panel 13. (See FIGS. 2 and 3).

  The central elastic region 24 formed in the rear waistline panel 13 is a range where the central elastic member 39 in a tension state exists, has a dimension L in the lateral direction B, and a dimension P in the front-rear direction C. Have. The dimension L means an effective length as an elastic material in which the central elastic member 39 in the drawing can repeat contraction and expansion. In other words, the dimension L is a dimension that does not include portions that are at both ends of the central elastic member 39 and that do not expand or contract when the diaper 1 is worn. In the present invention, when the dimension L is different among the plurality of central elastic members 39, the average value of the dimension L is used as the dimension L of the diaper 1. The dimension P means the dimension between the outermost sides of the central elastic members 39a and 39e among the central elastic members 39 positioned at both ends in the front-rear direction C.

  The position of the central elastic region 24 in the rear waistline panel 13 is determined by the dimensions Q and R and the dimension M. The dimension Q is the dimension from the upper edge 13e (see FIG. 3) of the rear waistline panel 13 to the upper end of the central elastic region 24, that is, the central elastic member 39a, and the central elastic region 24 and the rear waistline elastic member 37a overlap. Its value is determined so that it can be avoided. The dimension R is a dimension from the lower end edge 13f (see FIG. 3) of the rear waistline panel 13 to the lower end of the central elastic region 24, that is, the central elastic member 39e. When the central elastic region 24 including the central elastic member 39e is translated in the lateral direction B, the elastic expansion and contraction of the leg elastic members 58 in the crotch panel 14 can be repeatedly expanded and contracted. Preferably, the central elastic member 39 is located at a position that does not intersect with the intermediate portion 58c (see FIG. 6). The action of drawing toward the line 38 is weak, which is preferable for the diaper 1. The dimension M means a separation dimension in the lateral direction B between the central elastic region 24 that is symmetric with respect to the center line 38 and the rear waistline auxiliary elastic member 37b on each side of the center line 38. However, the dimension M is a minimum value of the distance N in the lateral direction B between the inner end portion 61 and the center line 38 of each of the rear waistline auxiliary elastic members 37b and 1/2 of the dimension L in the central elastic region 24. This is the value obtained as the difference between The inner end portion 61 of the rear waistline auxiliary elastic member 37b means an inner end portion in the lateral direction B of the portion where the elastic contraction and extension can be repeated in the rear waistline auxiliary elastic member 37b. . When the diaper 1 is for an infant including a newborn, the dimension X in FIG. 5 is preferably in the range of 280-340 mm, and the dimension Y is preferably in the range of 300-400 mm. Each of the dimensions L, M, and P in the diaper 1 having such a size is preferably at least 20 mm.

  Virtual lines 14g and 51b shown in the rear waistline panel 13 of the exploded perspective view in FIG. 5 are the rear end edge of the crotch panel 14 attached to the rear waistline panel 13 and the absorber 51 in the crotch panel 14. The position with the rear edge is shown. The rear end edge 14g of the crotch panel 14 is attached to the rear waistline panel 13 in a manner in which at least one rear waistline elastic member 37a is positioned behind (upward in FIG. 3), that is, within the range of the dimension Q. The rear end edge 51b of the absorber 51 is located in front of the rear waistline elastic member 37a (downward in FIG. 3), and preferably overlaps the central elastic region 24. Both side edges 51c of the absorbent body 51 overlap with the inner end 61 of the rear waistline auxiliary elastic member 37b, and when the rear waistline auxiliary elastic member 37b in FIGS. In this case, a force is exerted to extend it in the waist direction. A portion along the rear end edge 51 b of the absorber 51 on which such a force acts closely adheres to the wearer's body via the inner surface sheet 52.

  The front waistline panel 12 in the exploded perspective view in FIG. 5 is also formed symmetrically with respect to the center line 38. The elastic member 33 includes a front waistline elastic member 33a extending in an extended state from one side edge 12c to the other side edge 12c, and a front extending in an extended state from each of the side edges 12c to the inelastic region 21. A waistline auxiliary elastic member 33b. When the front waistline elastic member 33a contracts, the front waistline panel 12 acts so as to form a gather 18 in the peripheral portion of the waistline opening 16 in the front waistline panel 12, and the front waistline auxiliary elastic member 33b Acts to form gathers 19 in the side portions of the front waistline panel 12 located between the side edge portions 12c and the inelastic regions 21 (see FIG. 1).

  The absorber 51 is attached to the front waistline panel 12 in such a manner that most of the portion overlapping the front waistline panel 12 is overlapped with the inelastic region 21, and even if the elastic member 33 contracts, the absorber 51 is affected by the influence. Can prevent many gathers from occurring. However, both side edges 51c of the absorber 51 overlap with the inner end 60 of the front waistline auxiliary elastic member 33b, and the front waistline auxiliary elastic member 33b in FIG. 1 is in the lateral direction B, more precisely in the waistline direction. When extending, the absorber 51 is applied with a force for extending it in the lateral direction B. The portion along the front edge 51a of the absorber 51 on which such a force acts not only adheres well to the wearer's body via the inner surface sheet 52, but also extends in the front-rear direction C (vertical direction A in FIG. 3). In the case of having a gather, the gather tends to disappear. Even if the front end portion 14c of the crotch panel 14 including the absorber 51 may overlap with the front waistline elastic member 33a, it does not reach the front edge 12e of the front waistline panel 12 (see FIG. 3).

  In the diaper 1 thus formed, the central portion 45 that is not joined to the central elastic region 24 of the rear waistline panel 13 at the rear end portion 14d of the crotch panel 14 has a crack in the diaper wearer's buttocks. Therefore, the flow of urine or soft stool that leaks out of the diaper 1 through the crack can be stopped, and leakage of urine or soft stool in the diaper 1 can be prevented. In particular, as illustrated in FIG. 3, when the tip portion 45 a of the central portion 45 protrudes at an acute angle, the crotch panel 14 can easily enter the butt crack. Further, when the central portion 45 is in a non-bonded state with respect to the rear waistline panel 13 in the entire portion facing the rear waistline panel 13, the central portion 45 can easily protrude. The diaper 1 having the central elastic region 24 and the central portion 45 that act in this way does not particularly limit the wearer, but the diaper 1 is worn by infants who often have a supine posture among diaper wearers. Sometimes a significant effect can be achieved.

In an example in which the diaper 1 is for infants or infants, the inner sheet 31 and the outer sheet 32 of the front waistline panel 12 and the inner sheet 35 and the outer sheet 36 of the rear waistline panel 13 are thermoplastically synthesized. It is preferable to use a breathable nonwoven fabric formed of fibers. For example, spunbond nonwoven fabrics, spunbond-meltblown-spunbond nonwoven fabrics, etc. that are formed of synthetic fibers (including composite fibers) such as polyethylene, polypropylene, and polyester resins, and whose mass per unit area is 10-40 g / m ^2. Can be used. The inner sheet 52 in the crotch panel 14 is formed of synthetic fibers (including composite fibers) such as polyethylene, polypropylene, and polyester resin, and has a mass per unit area of 8-25 g / m ² , such as a spunbond nonwoven fabric. And the nonwoven fabric which is hydrophilized and has liquid permeability can be used. The first outer sheet 53 in the crotch panel 14 is for preventing the bodily fluid absorbed by the absorbent body 51 from exuding to the outside of the diaper 1, and the first outer sheet 53 has a liquid-impervious synthetic resin. A film, more preferably a breathable liquid-impervious synthetic resin film, can be used. For example, a polyethylene film having a thickness of 0.01 to 0.03 mm can be used. The second outer surface sheet 54 is for making the outer surface of the crotch region 4 have a cloth-like touch and for forming the leakage barrier 56, and the second outer surface sheet 54 has a fineness of 1-4 dtex. A non-woven fabric, preferably a water-repellent non-woven fabric, having a mass per unit area of 15 to 40 g / m ² can be used. The absorbent body 51 is a wrapping sheet in which a core material 50a, which is an aggregate of water-absorbing materials formed by pulverized pulp or a mixture of pulverized pulp and highly water-absorbing polymer particles, is formed from tissue paper or a liquid-permeable nonwoven fabric. It is formed by covering with. When the diaper 1 is for infants or infants, the mass per unit area of the core material 50a is preferably in the range of 200-600 g / m ² . However, in the absorber 51, the thickness of at least a portion of the central portion 45 in the lateral direction B, for example, the portion 51e on the center line 38 (see FIG. 4) is made thinner than the thickness of the other portions of the central portion 45. (See FIG. 12 to be described later), the thickness of the entire central portion 45 is made thinner than the thickness of the outer portion 46 (see FIGS. 3 and 4) adjacent to the central portion 45, or FIG. 4 and FIG. As shown in the imaginary line in the section 51e, a slit-shaped through-hole 50d extending in the longitudinal direction A is formed in the core member 50a, so that the tip end 45a ( 3), the central portion 45 can easily protrude toward the inside of the diaper 1 when the central elastic region 24 contracts. It can be or to so that. In order to reduce the thickness of the central portion 45, when making the core material 50a, a method of partially reducing the mass per unit area of the core material 50a or partially pressing the core material 50a. Can be used. In the core material 50a having such a mass, the superabsorbent polymer particles are preferably used in the range of 0-60 mass%. As the highly water-absorbing polymer particles, general-purpose products in the technical field such as acrylonitrile-starch graft copolymer and sodium polyacrylate can be used.

  The front and rear waistline elastic members 33a and 37a, the front and rear waistline auxiliary elastic members 33b and 37b, the leakage breaker elastic member 57, and the leg-hole elastic member 58 in the diaper 1 are made of an elastic material such as natural rubber or spandex. Can be used. In the case of spandex, for example, LYCRA (registered trademark) White having 350-1080 dtex is expanded and used so that the expansion ratio with respect to the length when it is in a non-expanded state is 1.5-3.5 times. can do. As the elastic members 33a, 33b, 37a, 37b, 57, and 58, the diameters and the expansion ratio can be changed depending on the portion where the elastic members 33a, 33b, 37a, 37b, 57, and 58 are used. As the central elastic member 39 in the central elastic region 24 of the rear waistline panel 13, one formed of Tennobu rubber, spandex or the like can be used. For example, similarly to the rear waistline auxiliary elastic member 37b, a 350-700 dtex lycra white can be extended and used so that the expansion ratio is 1.5-3.5 times. When the diaper 1 is manufactured, the central elastic member 39 has the same position and interval in the longitudinal direction A in the central elastic region 24 as the position and interval in the longitudinal direction A of the rear waistline auxiliary elastic member 37b. The thickness (fineness) and the expansion ratio may be the same as the thickness and the expansion ratio of the rear waistline auxiliary elastic member 37b, but the central elastic member 39 has the thickness (dtex) and / or the expansion ratio of the rear waistline auxiliary elastic member. If the rear waistline panel 13 of FIG. 2 is extended to a certain extent in the lateral direction B even if the side portion 13g of the rear waistline panel 13 is extended, the central elastic region 24 will be larger. At the same time, it may not expand, or even if it expands, the expansion ratio may decrease, and thereby the protruding state of the central portion 45 may be maintained. In the present invention, the central elastic region 24 in the contracted state is elastically formed so that the central elastic region 24 does not follow and extend in the horizontal direction B even if the side portion 13g is extended in the horizontal direction B. It can be made difficult to stretch. The central elastic member 39 of FIG. 6 is also provided on the lower edge 13f of the rear waistline panel 13 regardless of whether the individual lengths L in the tensioned state are the same, that is, the retractable length is the same. It may be a mode in which the contraction force and contraction rate increase as it approaches. In such a diaper 1, the protruding height of the central elastic region 24 may become higher as it approaches the lower end edge 13f.

The contraction force and contraction rate of the central elastic member 39 are compared by using a test piece made by cutting the individual central elastic member 39 from the diaper 1 together with the inner sheet 35 and the outer sheet 36 having a certain width. be able to. The contraction force in the present invention is a value corresponding to the tensile force required to pull the test piece in a relaxed state where the central elastic member 39 is no longer contracted with a tensile tester and to bring the central elastic member 39 into a tensioned state. Means. Moreover, shrinkage, length Z ₁ of the central elastic member 39 with the difference in length of the central elastic member 39 which is in tension Z ₁ and the length Z ₂ of the central elastic member 39 in a relaxed state under tension The value divided by, ie, (Z ₁ −Z ₂ ) / Z ₁ is meant.

  FIG. 7 is a diagram illustrating an example of a process for continuously manufacturing the rear waistline panel 13. In the first step I in the figure, a first web 301 formed of a nonwoven fabric for obtaining the inner sheet 35 of the rear waistline panel 13 is supplied toward the machine direction MD, and the first web 301 is provided with a roller coater 311. Is used to apply the hot melt adhesive 312. A virtual line 305 extending in the intersecting direction CD on the first web 301 indicates a planned cutting position for obtaining the rear waistline panel 13. In the second step II, a plurality of thread-like elastic members 313, which are continuous bodies of the rear waistline elastic members 37a, are supplied toward the first web 301 in a state of being stretched by a required magnification, and the pair of pressure rolls 314 Under the action, it is bonded to the first web 301 via the hot melt adhesive 312. In the third step III, the hot-melt adhesive 317 is applied using a pair of roller coaters 316, and a first application area 318 and a second application area 319 are formed between the virtual lines 305 and 305. In addition, a non-application area 320 is formed between the application areas 318 and 319. In the fourth step IV, a plurality of thread-like elastic members 321 that are continuous bodies of the rear waistline auxiliary elastic member 37b and the central elastic member 39 are supplied toward the first web 301 in a state where they are extended by a required magnification. The first application area 318 and the second application area 319 are joined to the first web 301 under the action of the pressure roll 322. In the fifth step V, a pair of cutter rolls 323 are used to cut each of the thread-like elastic members 321 at the portion 325 shown in the fourth step IV. The part 325 is in the non-application area 320, and each of the cut thread-like elastic members 321 contracts to the first application area 318 and / or the second application area 319. In the sixth step VI, a hot melt adhesive (not shown) is used by using a pair of roller coaters 326 on almost the entire surface of one side of the second web 302 formed of a nonwoven fabric for obtaining the outer sheet 36 in the rear waistline panel 13. Is applied. When the second web 302 was joined to the first web 301 via the hot melt adhesive applied thereto, the thread-like elastic members 313 and 321 were sandwiched between the first web 301 and the second web 302. A composite web 303 in a state is obtained. The composite web 303 is cut along the virtual line 305 to become the rear waistline panel 13. In the composite web 303, the thread-like elastic member 321 located in the first application area 318 becomes the rear waistline auxiliary elastic member 37 b in the diaper 1, and the thread-like elastic member 321 located in the second application area 319 is the central elastic member in the diaper 1. Member 39 is formed. In the rear waistline panel 13 obtained in this way, the rear waistline auxiliary elastic member 37b and the central elastic member 39 are arranged so as to form a row in the lateral direction B of the diaper 1, and the expansion ratio of both elastic members 37b, 39 is The same.

  The rear waistline panel 13 can be obtained by adding various changes to the process of FIG. For example, the first application area 318 is formed on the first web 301, the thread-like elastic member 321 is joined to the first application area 318, and the thread-like elastic member 321 is cut between the adjacent first application areas 318. Then, the second application area 319 can be formed on the first web 301. The second application area 319 can be attached with an elastic member that is different from the thread-like elastic member 321 in thickness, elastic modulus, expansion ratio, arrangement in the cross direction CD, and the like. In addition, the thickness, elastic modulus, expansion ratio, and interval can be changed between the thread-like elastic members arranged in the cross direction CD in the second application area 319. For example, in the diaper 1, the rear waistline is changed by changing the process of FIG. 7 so that the expansion ratio of the central elastic member 39 and the distance between the central elastic members 39 gradually decrease from the upper side to the lower side of the rear waistline panel 13. Even when the panel 13 is pulled in the lateral direction B, the protruding state of the central portion 45 of the crotch panel 14 can be easily maintained.

  In the process of FIG. 7, instead of the hot melt adhesives 312 and 317 being applied to the first web 301, the hot melt adhesives 312 and 317 are applied to the thread-like elastic members 313 and 321. The process can be changed so that is applied. However, in that case, the hot-melt adhesive 312 is applied to the entire length of the thread-like elastic member 313, and the thread-like elastic member 321 is hot for the portion located in the non-application area 320 in FIG. The process is changed so that the melt adhesive 317 is not applied and the hot melt adhesive is applied to other portions. By adopting such a modified process, a web equivalent to the web obtained in the fourth process IV of FIG. 7 can be obtained.

  In the process of FIG. 7, the second web 302 shown in the sixth process VI of FIG. 7 is supplied following the fourth process IV, so that the thread-like elastic members 313 and 321 are connected to the first and second webs 301. , 302 and then the process can be changed so that the thread-like elastic member 321 is cut by the cutter roll 323 shown in the fifth process V. Furthermore, the thread-like elastic member 321 sandwiched between the first and second webs 301 and 302 heats the portion of the first web 301 located in the non-application area 320 shown in the third step III of FIG. By performing the modification so as not to shrink, that is, to become an inelastic portion, it is possible to replace the cutting operation at the portion 325 shown in the fourth step IV.

  In the present invention, in the longitudinal direction A, it is not essential that the positions and intervals of the central elastic members 39 are the same as the positions and intervals of the rear waistline auxiliary elastic members 37b. In the diaper 1, the position and interval of the central elastic member 39 may be different from the position and interval of the rear waistline auxiliary elastic member 37b.

  FIG. 8 is a view similar to FIG. 6 showing an example of the embodiment. In the rear waistline panel 13 in FIG. 8, instead of the plurality of thread-like central elastic members 39 in FIG. The central elastic member 39 in the extended state has dimensions L, M, P, Q, and R as in the case of FIG. The central elastic member 39 is made of an elastic material such as natural rubber or synthetic rubber, and is joined to the inner sheet 35 and / or the outer sheet 36 via a hot melt adhesive (not shown).

  FIG. 9 is also a view similar to FIG. 6 showing an example of the embodiment. In the rear waistline panel 13 in FIG. 9, the lengths of the plurality of central elastic members 39 arranged in the front-rear direction C are gradually increased from the upper end edge 13e toward the lower end edge 13f. In the crotch panel 14 attached to the rear waistline panel 13 when the expansion ratio of the central elastic member 39 is the same, the lateral direction in the base of the central portion 45 that protrudes toward the inside of the diaper 1 The dimension of B, that is, the dimension in the lateral direction B of the central elastic region 24 in the rear waistline panel 13 gradually increases from the upper side to the lower side of the rear waistline panel 13. The central portion 45 having such a shape is easy to fit to the crack of the hip and its peripheral area. In the rear waistline panel 13 and the rear waistline panel 13 in the other illustrated examples, the thread-like central elastic member 39 is not limited to the five strips in the illustrated example, and can be appropriately increased or decreased.

  10 and 11 are also similar to FIGS. 2 and 5 showing an example of the embodiment. However, unlike the diaper 1 illustrated in FIG. 1, the diaper 1 in FIG. 10 does not have the rear waistline auxiliary elastic member 37b shown in FIG. 5 (see FIG. 11). Such a diaper 1 may be inferior in fitting the rear end portion 14d of the crotch panel 14 to the body of the diaper wearer as compared to the diaper 1 illustrated in FIG. It is useful as an infant diaper.

  FIG. 12 is also a view similar to FIG. 4 showing an example of the embodiment. In the diaper 1 of FIG. 12, the first outer sheet 53 and the second outer sheet 54 at the rear end portion 14d of the rear waistline panel 13 and the crotch panel 14 are joined together via a hot melt adhesive (not shown). An elastic region 24 is formed. The central elastic region 24 contracts as the central elastic member 39 contracts, and a gather 25 is formed on the rear waistline panel 13, the first outer sheet 53, and the second outer sheet 54. The rear end portion 14d of the crotch panel 14 includes a core member 50a in which the absorbent body 51 is an aggregate of liquid-absorbing materials, and a liquid-permeable wrapping sheet 50b that covers the core member 50a. In the central portion 45, the wrapping sheet 50b is bonded to the core member 50a via a hot melt adhesive (not shown), but is not bonded to the first outer sheet 53, and the central elastic region 24 is The absorbent body 51 and the inner sheet 52 protrude toward the inside of the diaper 1 as it shrinks. As described above, in the present invention, the central elastic region 24 can be formed by the rear waistline panel 13 and a part of the crotch panel 14. In the absorber 51 in FIG. 12, the portion 51e on the center line 38 is formed thinner than the portions located on both sides of the portion 51e, and the tip portion 45a of the protruding central portion 45 tends to have a sharp shape. .

  FIG. 13 is a perspective view of an open diaper 101 as an example of the embodiment. The shape and structure of the diaper 101 is substantially the same as that of the developed diaper 1a in FIG. However, the tape fastener 102 is attached to each of the side edge portions 13c of the rear waistline panel 13 in the diaper 101. The tape fastener 102 has means 103 that can be removably fastened to the outer surface 12b of the front waistline panel 12 or a target area provided on the outer surface 12b. As the means 103, those commonly used in the technical field such as an adhesive or a hook member of a mechanical fastener can be used.

  FIG. 14 is a perspective view of an open diaper 101 having a different form from the open diaper 101 of FIG. In the open diaper 101 of FIG. 13, the front waistline panel 12, the back waistline panel 13, and the crotch panel 14 are made separately. In the open diaper 101 of FIG. Instead of the panel 12 and the crotch panel 14, a front panel 114 that is an integrated panel and a rear panel 113 that is formed in the same manner as the rear waistline panel 13 of FIG. 2 are used. In the front panel 114, the inner sheet 152 and the second outer sheet 154 are formed by expanding the sizes of the inner sheet 52 and the second outer sheet 54 used in the crotch panel 14 of FIG. . A first outer sheet 153 that is the same as the first outer sheet 53 in FIG. 5 is used between the absorber 151 and the second outer sheet 154. The open-type diaper 101 in FIG. 14 does not have a leakage barrier. However, when the leakage barrier is necessary, the leakage barrier can be made of a sheet separate from the inner sheet 152. it can.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Front waistline area 3 Rear waistline area 4 Inseam area 12 Front panel, front waistline panel 12a Inner surface 12b Outer surface 13 Rear panel, Rear waistline panel 13a Inner surface 13b Outer surface 13g Side part 14 Inseam panel 14a Inner surface 14b Outer surface 14d Rear End 14g Rear edge 14h Side edge 22 Inelastic region 24 Central elastic region 38 Center line 39 Central elastic member, sheet-like elastic member 39a-39e Central elastic member 45 Central portion 46 Outer portion 50a Core material 50d Through hole 51 Absorption Body 51b Rear edge 58 Leg elastic member 58c Middle part 101 Open diaper 113 Rear panel 114 Integrated panel (front panel)
151 Absorber L Length B Lateral direction C Longitudinal direction

Claims (15)

After forming the front panel and the rear waistline region having a front and back direction and a lateral direction corresponding to the front and back direction and the lateral direction in a diaper wearer, and forming at least the crotch region of the front waistline region and the crotch region The panel has an inner surface facing the diaper wearer's skin and an outer surface facing the diaper wearer's clothing, and an absorber is interposed between the inner surface and the outer surface in the crotch region of the front panel. A disposable diaper wherein the outer surface at the rear end of the front panel is bonded to the inner surface of the rear panel ,
Prior Symbol absorber has a rear end edge to said rear end of said front panel, one of said outer surface and said absorbent body in the rear end portion of the front panel, the central portion of the transverse direction the absorbent unbonded state near to the rear panel so that it can in the thickness direction of the body to vary the distance between the rear panel is, the outer surface and the absorbent body before SL front panel also, the lateral in both outer portion adjacent to the central portion in the direction, the state near spaced non bonded to the inner surface of the rear panel is, prior SL after the panel is resiliently into said lateral faces the said central portion A central elastic region capable of shrinking and reducing the size of the central portion in the lateral direction, and both outer portions on the side of the central elastic region without elastically contracting in the lateral direction. Small in In so that the have a the non-elastic region that does not reduce the dimension in the transverse direction of the Kutomo portion, said inner surface and is joined to said rear panel and said outer surface of said front panel,
In the rear end portion of the front panel, the central portion extends further rearward from the rear end edge of the absorber and reaches the rear end edge of the front panel located behind the rear end edge. Diapers characterized by. After forming the front panel and the rear waistline region having a front and back direction and a lateral direction corresponding to the front and back direction and the lateral direction in a diaper wearer, and forming at least the crotch region of the front waistline region and the crotch region The panel has an inner surface facing the diaper wearer's skin and an outer surface facing the diaper wearer's clothing, and an absorber is interposed between the inner surface and the outer surface in the crotch region of the front panel. A disposable diaper wherein the outer surface at the rear end of the front panel is bonded to the inner surface of the rear panel,
The absorber has a rear edge at the rear end portion of the front panel, and either the outer surface of the rear end portion of the front panel or the absorber has a central portion in the lateral direction as the absorber. The outer surface of the front panel and the absorber are also in the lateral direction in the non-bonded state with respect to the rear panel so that the distance from the rear panel can be changed in the thickness direction. In both outer portions adjacent to the central portion, the rear panel is in a state of being non-separably bonded to the inner surface of the rear panel, and the rear panel is elastically contracted in the lateral direction so as to face the central portion. A central elastic region capable of reducing the size of the portion in the lateral direction, and a small amount in each of the outer portions on the side of the central elastic region and without elastically contracting in the lateral direction. So as to have a non-elastic region that does not reduce the dimension in the transverse direction of the Kutomo portion, said inner surface and is joined to said rear panel and said outer surface of said front panel,
The central elastic region is formed by attaching a plurality of thread-like central elastic members extending in parallel to each other in the lateral direction to the rear panel so as to be contractible.
The plurality of central elastic members are arranged in a direction from the rear waistline region toward the crotch region, have the same shrinkable length in the lateral direction, and the shrinkage force increases as the direction proceeds. Diapers characterized by that . After forming the front panel and the rear waistline region having a front and back direction and a lateral direction corresponding to the front and back direction and the lateral direction in a diaper wearer, and forming at least the crotch region of the front waistline region and the crotch region The panel has an inner surface facing the diaper wearer's skin and an outer surface facing the diaper wearer's clothing, and an absorber is interposed between the inner surface and the outer surface in the crotch region of the front panel. A disposable diaper wherein the outer surface at the rear end of the front panel is bonded to the inner surface of the rear panel,
The absorber has a rear edge at the rear end portion of the front panel, and either the outer surface of the rear end portion of the front panel or the absorber has a central portion in the lateral direction as the absorber. The outer surface of the front panel and the absorber are also in the lateral direction in the non-bonded state with respect to the rear panel so that the distance from the rear panel can be changed in the thickness direction. In both outer portions adjacent to the central portion, the rear panel is in a state of being non-separably bonded to the inner surface of the rear panel, and the rear panel is elastically contracted in the lateral direction so as to face the central portion. A central elastic region capable of reducing the size of the portion in the lateral direction, and a small amount in each of the outer portions on the side of the central elastic region and without elastically contracting in the lateral direction. So as to have a non-elastic region that does not reduce the dimension in the transverse direction of the Kutomo portion, said inner surface and is joined to said rear panel and said outer surface of said front panel,
The central elastic region is formed by attaching a plurality of thread-like central elastic members extending in parallel to each other in the lateral direction to the rear panel so as to be contractible.
The plurality of central elastic members are lined up in the direction from the rear waistline region to the crotch region, have the same shrinkable length in the lateral direction, and the shrinkage rate increases as proceeding in the direction. Diapers characterized by that. After forming the front panel and the rear waistline region having a front and back direction and a lateral direction corresponding to the front and back direction and the lateral direction in a diaper wearer, and forming at least the crotch region of the front waistline region and the crotch region The panel has an inner surface facing the diaper wearer's skin and an outer surface facing the diaper wearer's clothing, and an absorber is interposed between the inner surface and the outer surface in the crotch region of the front panel. A disposable diaper wherein the outer surface at the rear end of the front panel is bonded to the inner surface of the rear panel,
The absorber has a rear edge at the rear end portion of the front panel, and either the outer surface of the rear end portion of the front panel or the absorber has a central portion in the lateral direction as the absorber. The outer surface of the front panel and the absorber are also in the lateral direction in the non-bonded state with respect to the rear panel so that the distance from the rear panel can be changed in the thickness direction. In both outer portions adjacent to the central portion, the rear panel is in a state of being non-separably bonded to the inner surface of the rear panel, and the rear panel is elastically contracted in the lateral direction so as to face the central portion. A central elastic region capable of reducing the size of the portion in the lateral direction, and a small amount in each of the outer portions on the side of the central elastic region and without elastically contracting in the lateral direction. So as to have a non-elastic region that does not reduce the dimension in the transverse direction of the Kutomo portion, said inner surface and is joined to said rear panel and said outer surface of said front panel,
In the crotch region of the front panel, leg elastic members extending in the front-rear direction are attached to side edges on both sides in the lateral direction, and the leg elastic members are not elastically contracted. Each of the end portions has an intermediate portion that is elastically contractible between the front and rear end portions, and the central elastic region intersects the intermediate portion even if it is translated in the lateral direction. A diaper characterized by being in a position free of Said central portion when the central elastic region in the transverse direction is in a tense state, the a lateral dimension of at least 20 mm, extending from the rear edge of the absorbent body towards front along the absorber The diaper according to any one of claims 1 to 4, wherein the dimension in the front-rear direction is at least 20 mm. The diaper according to any one of claims 1 to 5 , wherein at least the part of the outer parts has the lateral dimension of at least 20 mm. The plurality of the central elastic member, a shrinkage rate is the same, diaper according to claim 2 or 3 contractible length is longer as one proceeds to the direction. The diaper according to any one of claims 1 to 7, wherein the central elastic region is formed by attaching a single sheet-like elastic member to the rear panel in a state of extending in the lateral direction. In the central portion, the absorbent body, the claims thickness of the center line of the portion bisecting the dimension of the transverse direction is formed thinner than the thickness of the portion located on either side of the portion of said center line The diaper in any one of 1-8 . In the central portion, the absorbent body, a slit-like penetrating in the lateral direction of the thickness direction core dimensions extend along the center line to center line of the portion bisecting in the absorber The diaper in any one of Claims 1-8 in which the through-hole of this is formed. The rear panel is formed such that a lateral portion located outside the front panel in the lateral direction is elastically contractible in the lateral direction, and the lateral portion and the central elastic region are in a contracted state. The diaper according to any one of claims 1 to 10 , wherein the central elastic region does not extend in the lateral direction even when the lateral portion is extended in the lateral direction. The diaper includes a front waistline panel that forms the front waistline region, a rear waistline panel that forms the rear waistline region, and a crotch panel that forms the crotch region, and the crotch panel forms the front panel The diaper according to claim 1 , wherein the rear waistline panel forms the rear panel. The diaper includes a integrated panel in a state in which the is a front waist region and said crotch region are integrated, and a said rear waistline panel forming the rear waist region, said integrated panel is the front panel The diaper according to claim 1 , wherein the diaper is formed and the rear waistline panel forms the rear panel. The diaper according to claim 1 , wherein the diaper is for an infant. The diaper according to any one of claims 1 to 14, wherein the diaper is one of a pants-type diaper and an open-type diaper.

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