JP2014108295A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article in which an absorbent main body is bonded to an exterior body stably irrespective of expansion/contraction of the exterior body while maintaining excellent elasticity of the exterior body.SOLUTION: An absorbent article includes an exterior body 2 and an absorbent main body 3 arranged on a skin face side. An exterior body 2 has such elasticity that a ventral part F and dorsal part R can expand and contract in a waist direction of a wearer, and has a non-bonding zone area of the absorbent main body 3 and the exterior body 2 of the ventral part F and dorsal part R in a part where both of them overlap. The non-bonding zone area lies over the whole region in the width direction ( X direction ) of the absorbent main body 3, and overlaps an arrangement area of the absorbent core in at least one part. A pair of auxiliary sheets 5 covering both end parts in its longitudinal direction ( Y direction ) are arranged on a skin face side of the absorbent main body 3. The auxiliary sheets 5 are bonded to the exterior body 2 of the ventral part F and dorsal part R extending outside the absorbent main body 3. The arrangement areas of the auxiliary sheets 5 overlap the non-bonding zone area 4.

Description

  The present invention relates to an absorbent article such as a disposable diaper.

  In an absorbent article such as a disposable diaper, an elastic force is applied to the waistline portion, and the diaper or the like is fixed around the waist of the wearer. There is a method in which an elastic member is provided as a method for imparting the stretching force. However, the contraction force concentrates on the site where the elastic member is present, which may tighten the skin. In order to avoid this, some diaper outer bodies including the waistline portion are formed using an elastic sheet. An absorbent main body is usually bonded to the skin surface side of the exterior body with an adhesive or the like. For this reason, the stretchability may be weakened at the joint portion, or the air permeability may be deteriorated. Various proposals have been made to improve this.

For example, Patent Document 1 discloses a disposable diaper in which an absorbent main body is bonded with an adhesive only at a central portion in the width direction excluding both ends in the longitudinal direction with respect to an outer packaging material that is entirely stretchable. Yes. A folded portion of the outer layer sheet is disposed at the longitudinal end of the absorbent main body, and is bonded and fixed with an adhesive. Further, in Patent Document 2, an absorbent body element is bonded to a main body back sheet made of a material that exhibits elastic elasticity as a whole at both front and rear ends thereof, and at the middle part in the front and rear direction of the absorbent element, the width direction or front and rear Disposable disposable diapers are disclosed that are joined along a direction.
Furthermore, in Patent Document 3, an absorbent main body is bonded to an exterior body formed by joining an outer sheet and a non-stretchable inner layer sheet with an adhesive to a stretchable sheet on the abdomen and backside. A pants-type disposable diaper joined with an agent is disclosed. The longitudinal end portion of the absorbent main body is covered with a covering sheet, and an extending portion of the covering sheet that extends outward from the absorbent main body is joined to the exterior body. The application amount of the adhesive between the outer layer sheet and the inner layer sheet of the outer package is made smaller in the arrangement region of the extension part than in other regions.

JP 2007-105453 A JP 2003-265523 A JP 2010-082328 A

  In the disposable diaper of the said patent document 1, the area which joins an absorptive main body with respect to the exterior body which the whole expands-contracts is restrict | limited. Therefore, there is a possibility that the absorbent main body may peel off or bend depending on the expansion / contraction strength of the exterior body, and the bonding strength is not sufficient. This also applies to the disposable paper diaper disclosed in Patent Document 2. In the pants-type disposable diaper of the said patent document 3, the adjustment of the joining area to the outer packaging material of an absorptive main body as mentioned above is not adjusted, but the part which has a stretching property is joined to the whole surface. It merely reduces the obstruction of air permeability and the like by adjusting the coating amount of the adhesive between the inner layer sheet and the outer layer sheet forming the outer package. Therefore, the stretchability of the exterior body and the strength of fixing the absorbent main body to the exterior body are not considered.

  In view of the above points, the present invention relates to an absorbent article in which an absorbent main body is stably bonded to an exterior body regardless of the expansion and contraction of the exterior body, while maintaining excellent stretchability of the exterior body.

  The present invention includes an exterior body and an absorbent main body disposed on the skin surface side, and the exterior body is disposed on the abdomen side of the wearer and on the back side of the wearer. An absorbent article having a side part and a crotch part positioned between the abdomen side part and the dorsal side part, wherein the exterior body is provided on the abdomen side part and the dorsal side part of the wearer around the waist. A non-bonding band region at a portion where the absorbent main body and the outer side of the abdomen and the back side overlap, and the non-bonding band region is the absorptive Over the entire width direction of the main body and at least partially overlaps with the arrangement area of the absorbent core, on the skin surface side of the absorbent main body, a pair of auxiliary sheets covering both ends in the longitudinal direction The auxiliary sheet is joined to the abdominal and back side exterior bodies extending outward from the absorbent main body, Arrangement area of the sheet, to provide an absorbent article overlapping with the non-bonding zones.

  The absorbent article of the present invention is one in which the bonding between the absorbent main body and the exterior body is stabilized regardless of the expansion and contraction of the exterior body, while maintaining the excellent stretchability of the exterior body.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which showed typically the underpants type disposable diaper 10 as preferable one Embodiment (1st Embodiment) of the absorbent article of this invention as a shape of a wearing condition from the ventral side. FIG. 2 is a partially cutaway developed plan view schematically showing a state in which the pant diaper shown in FIG. 1 is developed and extended from the skin surface side. It is a top view which isolate | separates and shows each sheet | seat which comprises the exterior | packing body of the underpants type disposable diaper shown in FIG. 2, and an absorptive main body, (A) shows the skin surface side of an outer side sheet, (B) is an inner side sheet | seat. (C) shows the non-skin surface side of an absorptive main body. FIG. 3 is an explanatory diagram showing an arrangement of a non-joint band region 4, an auxiliary sheet 5, a joint portion row 6, and an exterior body laminated portion 28 in the planar shape of the exterior body shown in FIG. It is sectional drawing which expands and shows the VV sectional view of FIG. It is sectional drawing which expands and shows the VI-VI line cross section of FIG. (A)-(C) are explanatory drawings which show the example of arrangement | positioning of a non-joint zone area | region. It is sectional drawing which expands and shows the VIII-VIII line cross section of FIG. It is a top view which shows typically the state which unfolded and expanded the exterior body of the underpants type disposable diaper as a 2nd embodiment of the absorptive article of the present invention from the skin side, and (A) is the skin side of an outer layer sheet (B) shows the skin surface side of the inner sheet. FIG. 5 is an explanatory view corresponding to FIG. 4 showing the arrangement of the non-joint band region 4, the auxiliary sheet 5, the joint portion row 6, and the exterior body laminated portion 28 in the planar shape of the exterior body of the second embodiment.

Hereinafter, a pants-type disposable diaper as a preferred embodiment of the absorbent article of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, a pants-type disposable diaper 10 according to this embodiment includes an exterior material 2 and an absorbent main body 3 disposed on the skin surface thereof. The exterior body 2 has the outer shape of the diaper 10, and is provided with an abdominal side portion F arranged on the wearer's belly side, a back side portion R arranged on the wearer's back side, and an abdominal side portion F and a back side portion R. The crotch part C is located between the two. The ventral portion F and the dorsal portion R are opposed to each other with the crotch portion C as a turning shaft, and are joined by side seal portions 11 and 11 on both sides to form an annular waistline portion D. Thereby, the diaper 10 has the waist opening part 12 by which the upper end of the waist part D was open | released, and a pair of leg opening parts 13 and 13 by which the both sides of the crotch part C below the waist part D were open | released. The side seal portion 11 is formed by any method such as heat sealing or ultrasonic sealing.

  In the present invention, unless otherwise specified, the side in contact with the human body is referred to as the skin surface side or the skin contact surface side or the surface side, and the opposite side is referred to as the non-skin surface side or the non-skin contact surface side or the back surface side. . The direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end. The normal direction of the front surface or the back surface of the absorbent article is called the thickness direction, and the amount is called thickness.

  The shape in which the diaper 10 is broken and developed by the side seal portions 11 and 11 is divided into a ventral side portion F, a crotch portion C, and a back side portion R in the longitudinal direction (Y direction) as shown in FIG. The exterior body 2 has a substantially hourglass shape in which both side edges at the center in the longitudinal direction are bound inward in the width direction (X direction). In addition, the width direction (X direction) shown in the unfolded state coincides with the wearer's waist direction in the state assembled in the pants-type disposable diaper 10 of FIG. Further, the longitudinal direction (Y direction) shown in the unfolded state is a state where the pants-type disposable diaper 10 of FIG. 1 is assembled. In the crotch part C, it corresponds to the front-rear direction connected from the abdomen side to the back side through the wearer's inseam.

  The absorptive main body 3 is directed to the abdominal side F and the back side R around the crotch part C of the exterior body 3 with the longitudinal direction of the exterior body 2 facing the longitudinal direction (Y direction) of the diaper on the skin surface side of the exterior body 2. It is arranged and joined over. The absorbent main body 3 includes a liquid-permeable top sheet 31, a water-repellent back sheet 32, and an absorbent core 33 disposed between both sheets as constituent members. Further, side sheets 34 are arranged along the longitudinal direction of the absorbent main body 3 on both sides of the surface sheet 31 on the skin contact surface side. The side sheet 34 extends outward in the width direction of the top sheet 31 and is rolled down to the non-skin contact surface side, between the absorbent core 33 and the back sheet 32 or the non-skin contact surface side of the back sheet 32. It is fixed to the joint. The absorptive core 33 has a constricted portion at a portion located in the crotch portion C in a plan view, and has a shape branched into a plurality as it goes toward the back side portion R. In addition, in this invention, the shape of the absorptive core 33 is not limited to the thing of this embodiment, A rectangle, an hourglass shape, other shapes, etc. can be arbitrarily set by usage purposes.

The exterior body 2 is formed by laminating an outer sheet 21 and an inner sheet 25 when viewed in the thickness direction of the member. Both sheets are joined using an arbitrary adhesive such as a hot melt adhesive. Further, between the two sheets, the leg gather-forming elastic member 27 is joined in an extended state at both sides of the crotch part C.
The inner sheet 25 is located on the skin contact surface side of the exterior body 2 and is formed by arranging a single non-stretchable sheet 26 on the entire surface extending from the abdominal side F, the crotch C, and the back side R. Yes (see FIG. 3B).
The outer sheet 21 is located on the non-skin contact surface side of the exterior body 2, and has a stretchable sheet 22 that is stretchable in the waist direction of the wearer, that is, the width direction (X direction) of the exterior body 2, and the non-stretchable sheet. It consists of an inseam sheet 23 (see FIG. 3A). Specifically, the outer sheet 21 is provided with the stretchable sheets 22, 22 in the stretched state on the abdominal side F and the backside R, respectively, and the crotch sheet 23 constituting the stretchable sheets 22, 22 and the crotch C Are formed by overlapping and pasting the end portions of the two. That is, the outer sheet 21 is a composite sheet in which the stretchable sheet 22, the crotch sheet 23, and the stretchable sheet 22 are combined in the longitudinal direction (Y direction). A portion where the stretchable sheet 22 and the front and rear ends of the crotch sheet 23 are overlapped and bonded together is referred to as a bonded portion 24. The bonding portion 24 is a non-stretchable portion due to the above-described member configuration, and constitutes the crotch portion C. And the laminated body part 28 is formed by the bonding part 24 and the inner layer sheet 25, and this makes the both ends of the longitudinal direction (Y direction) in the non-stretchable crotch part C. Moreover, the outer side sheet | seat 21 is joined to the inner layer sheet | seat 25 in the expansion | extension state in the ventral | abdominal side part F and the back | dorsal side part R.

  Further, the elastic sheets 22, 22 forming the ventral side portion F and the back side portion R of the outer sheet 21 are folded back from the opening edge 12 </ b> A of the waist opening 12 toward the skin contact surface side and joined to the inner sheet 25. The folded portions 22E and 22E are provided. In this portion, the stretchable outer layer sheet 21 is double-layered via the non-stretchable inner layer sheet 25, and the stretchability of this portion is made higher than the other portions. Thereby, 12 A of opening edge edges fit easily to skin, and it is hard to produce a clearance gap with skin. Further, an elastic member may be disposed between the folded portion 22E and the exterior sheet 21 or the inner layer sheet 25 as stretchable reinforcement. Or the aspect without a folding | turning part may be sufficient.

The “stretchability” of the stretchable sheet 22 described above means that the maximum elongation in at least one direction is 100% or more (a state in which 100% is stretched from the original sheet length = twice the original sheet length). The elongation recovery rate (elongation recovery rate at 100% elongation) when stretched to 100% and then contracted in a direction where the maximum elongation is 100% or more is at least 70% or more. means. In the case of an elastic sheet having a plurality of directions having a maximum elongation of 100% or more, the elongation recovery rate may be 70% or more in any one of the directions.
The elastic sheet 22 expands greatly in the width direction (X direction) and contracts after expansion (maximum elongation of 100% or more and elongation recovery rate of 70% or more), but slightly in the longitudinal direction (Y direction). (E.g., a maximum elongation of 50% or less).

The elongation recovery rate of the elastic sheet is measured by the following measuring method.
(Measurement method of elongation recovery rate)
A sample piece of an elastic sheet having a length of 50 mm and a width of 25 mm is prepared, and the sample piece is fixed at a chuck interval K0 using a tensile tester ("Tensilon" RTC-1210A manufactured by Orientec Co., Ltd.), and 300 mm / min. After stretching to 100% stretched length K2 (K2 = K0 × 2) at the same speed, after starting to return at the same speed as the tensile speed, the length of the sample piece was restored after stretching. The length is K1. The elongation recovery rate at 100% elongation is calculated from the following equation.
Elongation recovery rate at 100% elongation (%) = [(K2−K1) / (K2−K0)] × 100

  The “non-stretchable” of the non-stretchable sheet 26 is a sheet whose elongation recovery rate (%) measured by the above [Method for measuring stretch recovery rate] is 20% or less, or a sheet that breaks before 100% stretch. Say. The non-stretchable sheet 26 may or may not have extensibility, but the maximum elongation is preferably 90% or less.

  In the diaper 10, the annular stretchability of the waistline portion D is improved by arranging the non-joint band region 4 and the auxiliary sheet 5, which will be described later, on the ventral side F and the back side R, and the arrangement position of the absorbent main body 3. Is stabilized. Moreover, the absorptive main body 3 is firmly joined and fixed to the exterior body by arranging a joint line 6 to be described later on the crotch part C. In particular, the splicing force of the waistline portion D to the crotch portion C is blocked by the joint portion row 6 and the exterior body laminate portion 28, and the arrangement position of the absorbent main body 3 with respect to the exterior body is stabilized. These points will be described in detail below.

  First, as shown in FIGS. 3 and 4, a portion where the absorbent main body 3 and the exterior body 2 of the abdominal side F and the back side R overlap each other has a non-joint band region 4 in which both are not joined. The non-joint band region 4 extends over the entire width direction (X direction) of the absorbent main body 3. In the present embodiment, the non-joint band region 4 is at least a part of the arrangement region of the absorbent core 33 among the longitudinal ends of the absorbent main body 3 that overlaps the ventral side F and the back side R of the exterior body 3. Are overlapping. This region is a region denoted by reference numeral 4 indicated by a two-dot chain line in FIG. Moreover, it is the range of the length (H2) of the longitudinal direction (Y direction) shown by FIG. In other words, the non-joint band region 4 extends over most of the range where the absorbent main body 3 overlaps the ventral side F and the back side R of the exterior body 2. In FIG. 3, the non-joint band region 4 and the exterior body laminated portion 28 are regions defined by two-dot chain lines, and are shown on the skin surface side of the inner layer sheet 25 together with various joint portions for convenience. Further, in FIG. 4, in order to understand the arrangement range of the non-joint band region 4, the exterior body laminated portion 28, and the joint portion row 6, it is projected onto the exterior shape of the exterior body 2. In this figure, the exterior body 2, the absorptive main body 3, and the auxiliary sheet 5 are indicated by a one-dot chain line, and the non-joint band region 4 and the exterior body laminated portion 28 are indicated by a two-dot chain line.

  In the non-joint band region 4, the thick absorbent main body 3 is separated from the exterior body 2 as shown in the cross-sectional views of FIGS. 5 and 6. Thereby, the elasticity of the width direction (X direction) of the exterior body 2 is not inhibited by the hardness of the absorbent main body 3. That is, the annular stretchability is sufficiently exhibited in the waistline portion D in which the ventral portion F and the back portion R are combined.

  A pair of auxiliary sheets 5 and 5 covering both ends in the longitudinal direction (Y direction) are disposed on the skin side of the absorbent main body 2. This auxiliary sheet 5 is joined to the abdominal side F and back side R of the exterior body 2 outside the absorbent main body 3. More specifically, the auxiliary sheet 5 is joined to the outer exterior body 2 of the absorbent main body 3 by joint portions 51A, 51B, and 51C (see FIG. 3B). The end of the auxiliary sheet 5 in the width direction is joined and fixed by the side seal portion 11.

  The auxiliary sheets 5 and 5 are arranged so as to overlap the non-bonding band region 4. With this configuration, the following operation is performed. In the present embodiment, as shown in FIG. 4, the non-bonding band region 4 is in a wide range extending from the covering range of the auxiliary sheet 5 to the crotch C side. On the other hand, the auxiliary sheet 5 joined to the exterior body 2 suppresses the positional deviation, twisting, and twisting that may occur due to the floating of the absorbent main body 3 in the non-joint band region 4. Thereby, the absorptive main body 3 firmly contacts the skin despite the presence of the non-bonding zone region 4. In addition, the auxiliary sheet 5 is made of a thin sheet such as a non-woven fabric having air permeability, and does not hinder the stretchability of the exterior body 2 as compared with the thick absorbent main body 3. In this way, the non-joint band region 4 and the auxiliary sheet 5 secure the arrangement stability of the absorbent main body 3 while improving the stretchability of the exterior body 2 in the waistline portion D. Furthermore, the auxiliary sheet 5 suppresses the bulkiness of the waistline portion D due to the floating of the absorbent main body 3 and the feeling of stiffness when worn.

  Such an auxiliary sheet 5 may be a member independent of the exterior body 2, or may be one in which the above-described folded portion 22 </ b> E extends to the absorbent core 3. Moreover, the auxiliary sheet 5 and the absorptive main body 3 may be joined or may not be joined. It is preferable that it is joined from a viewpoint of the arrangement | positioning stability of the absorptive main body 3. FIG. Further, as shown in FIG. 6, the absorbent main body 3 is configured such that the end edges 39 of the absorbent main body 3 where the absorbent core 33 is not disposed are the joint portions 7 </ b> A and the ventral side F of the outer package 2. The back side R may be joined. Since the edge 39 has a thin thickness corresponding to the absence of the absorbent core 33 and has flexibility of the sheet, the arrangement stability of the absorbent main body is made more reliable without inhibiting the stretchability of the body 2. .

  The length in the longitudinal direction (Y direction) of the non-joint band region 4 is not limited to that of the present embodiment shown in FIG. Further, the non-joint band region 5 is not limited to a single region, and may be a region divided into a plurality of portions in the longitudinal direction. For example, as shown in FIG. 7A, the absorbent main body 3 may be non-bonded over the entire surface with respect to the ventral side F and the back side R of the exterior body 2. Thereby, the stretchability of the whole waist part D which consists of the abdominal part F and the back part R is not inhibited, and it is preferable. Further, as shown in FIG. 7B, it may be divided into three non-joint band regions 4A, 4B and 4C. The non-bonding band region 4A is disposed so as to overlap the auxiliary sheet 5, and the non-bonding band regions 4B and 4C are disposed at a distance closer to the crotch part C than the lower end of the auxiliary sheet 4. Between the non-bonding band regions, bonding portions 7B and 7C are disposed, and the absorbent main body 3 including the absorbent core 33 and the exterior body 2 are partially bonded. Thereby, the elasticity of the whole abdominal part F and the back part R is ensured, ensuring the stability of joining of the absorptive main body 3. From the same viewpoint, as shown in FIG. 7C, the non-joint band region 4 is divided into a plurality of parts, and the edges 39, 39 of the absorbent main body 3 are joined to the exterior body 2 at the joint 7A. May be good.

The longitudinal direction (Y direction) length (H2) (see FIG. 6) of the non-joint band region 4 is set to the lengths (H1) of the ventral portion F and the dorsal portion R from the viewpoint of maintaining stretchability. On the other hand, it is preferably 10% or more, and more preferably 20% or more. The upper limit is preferably 95% or less, and more preferably 80% or less, from the viewpoint of maintaining the shape of the diaper. Note that the length in the longitudinal direction (Y direction) of the non-bonding band region 4 is indicated by the sum of these lengths when the non-bonding band region 4 is divided into a plurality of pieces.
Moreover, the length (H4) of the longitudinal direction (Y direction) which the auxiliary sheet | seat 5 coat | covers the absorptive main body 3 is a viewpoint which fixes the absorptive main body 3 firmly or prevents the absorber peeling at the time of diaper wear Therefore, it is preferably 5% or more and more preferably 10% or more with respect to the length (H1) of each of the ventral part F and the dorsal part R. The upper limit is preferably 50% or less, and more preferably 40% or less, from the viewpoint of maintaining stretchability.
Furthermore, the length (H6) in the longitudinal direction (Y direction) where the auxiliary sheet 5 is joined to the exterior body 2 outside the absorbent main body 3 is determined from the viewpoint of firmly fixing the absorbent main body 3 from the ventral side portion. 5% or more is preferable and 10% or more is more preferable with respect to the length (H1) of each of F and the back side R. The upper limit is preferably 50% or less, and more preferably 40% or less, from the viewpoint of maintaining stretchability.

  In addition, the abdominal side F and the back side R have an absorbent core 33 inside the absorbent main body 3 that overlaps them in the thickness direction. The absorbent core 3 is a relatively rigid member made of a liquid retaining member. Therefore, in this overlapping portion, the absorbent core 33 includes at least one of a portion having a low basis weight, a recess, and a void lacking a member so as to enhance the stretchability without inhibiting the stretchability of the stretchable sheet 22. Have. Thereby, for example, even if the expansion / contraction force of the exterior body 2 is transmitted to the absorbent main body 2 via the auxiliary sheet 5 or the elastic body 3 touches the exterior body 2 and the expansion / contraction force is transmitted, the basis weight is reduced. A low part, a recessed part, or a space | gap part becomes a base point of the absorptive core 33, and follows suitably. As a result, the absorbent main body 3 not only does not hinder the stretchability of the exterior body 2, but also prevents the absorbent main body 3 itself from curling. In addition, a part with a low basic weight is a part with a low basic weight compared with the peripheral part. The concave portion is a portion having a thin thickness as compared with the peripheral portion of the portion where the liquid retaining member constituting the absorbent core 33 is present. The void portion is a portion where the liquid retaining member constituting the absorbent core 33 is not present but the liquid retaining member is present in the periphery of the portion. In addition, the recess may have a lower basis weight than the peripheral portion, or the basis weight may be the same or higher, but the thickness may be thin.

  For example, as shown in FIG. 2, the portion indicated by the reference numeral 33 </ b> A at the end of the back side portion R or the crotch portion C to the ventral side portion F as such a low basis weight portion, concave portion or void portion. This is the portion indicated by the reference numeral 33B. These are long in the longitudinal direction (Y direction) and formed with a predetermined width in the width direction (X direction). The predetermined width is preferably 2 mm or more, and more preferably 3 mm or more. This facilitates deformation in the width direction. Moreover, the upper limit becomes like this. Preferably it is 30 mm or less, More preferably, it is 20 mm or less. Thereby, maintenance of absorption performance is attained. As a result, the absorptive main body 3 including the absorptive core 33 is a portion having a low basis weight, a vertically long portion provided with a recess or a void, and can be deformed following the expansion and contraction of the exterior body 2 in the waistline direction. Further, in order to follow the expansion and contraction more, a plurality of portions having a low basis weight, concave portions, and void portions can be arranged.

  On the other hand, as shown in FIG. 6, the absorbent main body 3 is bonded and fixed to the crotch portion C of the exterior body 2 by the bonding portion row 6. The crotch part C is non-stretchable as a whole as described above. The joint row 6 is disposed in the longitudinal direction (Y direction) with the exterior laminated portion 28 as both ends with respect to the non-stretchable crotch C. In the present embodiment, two strips are arranged on both sides of the crotch part C in the width direction. That is, the absorptive main body 3 is joined and stably disposed in the non-stretchable region surrounded by the two joint rows 6 and 6 and the outer body laminated portions 28 and 28.

The combination of the joint rows 6 and 6 and the exterior body laminated portion 28 stabilizes the shape of the crotch part C and enhances the joint stability of the absorbent main body 3.
First, as shown in FIG. 8, the exterior body laminated portion 28 has a thickness of a three-layer structure in which the elastic sheet 22 and the crotch sheet 23 that form the outer layer sheet 21 of the bonding portion 24 and the inner layer sheet 25 are combined. It is a non-stretchable part. This non-stretchable exterior laminate portion 28 is disposed in the width direction (X direction), and is disposed adjacent to the stretchable ventral side F and backside R. Due to the thickness and non-stretchability of the exterior body laminated portion 28, the spread of the stretch force in the width direction of the ventral portion F and the back portion R to the crotch portion C is blocked. As a result, the shape of the crotch part C is maintained without being affected by the stretching force in the width direction. And the shape of the crotch part C is reinforced in a longitudinal direction (Y direction) by the junction part row | line | column 6 bridging the outer-layer body laminated parts 28 and 28. FIG.

  By joining the absorptive main body 3 to such a region, the absorptive main body 3 is firmly fixed to the exterior body 2 and the arrangement position is stabilized. Thereby, although the stretchability is enhanced in the aforementioned non-joint band region 4, the absorbent main body 3 does not swell as a whole, but comes into contact with the wearer's skin so as to firmly receive the excretory fluid. Further, the crotch portion C and the absorbent main body 3 can be partially joined instead of the entire surface.

  In addition, the joining portion row 6 does not cross the exterior body laminated portion 28 and stops at the non-stretchable crotch portion C (see FIGS. 4 and 6), so that the stretching force of the waistline portion D via the joining portion row 6 Does not affect the absorbent main body 3. Even if the stretching force of the abdominal portion F and the dorsal portion R is transmitted to the absorbent main body 3 through the auxiliary sheet 5, the force is blocked by the combination of the joint portion row 6 and the exterior volume portion 28. . Also from this, the absorptive main body 3 is stably joined and fixed to the exterior body.

  Furthermore, in a state where the absorbent main body 3 absorbs and retains the excretory fluid and the weight increases, the exterior body laminated portion 28 and the joint portion row 6 support the absorbent main body 3 against the downward force of the absorbent main body 3. . Thereby, the crotch part C is brought close to the wearer's skin, and liquid leakage from the crotch is suppressed.

The joint row 6 is formed using various adhesives such as a hot melt adhesive. The adhesive may be applied to the entire application region with a uniform application amount, or may be continuously applied to the entire application region in an intermittent pattern such as a spiral pattern. Furthermore, as long as the joint strength in the longitudinal direction (Y direction) is obtained, the joint row 6 may be formed by an assembly of a plurality of small joint elements (not shown). The amount of the adhesive applied is preferably 0.3 g / m ² or more, and more preferably 0.5 g / m ² or more from the viewpoint of increasing the bonding strength and preventing peeling or tearing during wearing. The upper limit thereof is not damaging the skin of the wearer suppressing stiffness increasing in the crotch portion from C, in view of securing the permeability, preferably 8 g / m ² or less, more preferably 6 g / m ² or less.

  In the crotch portion C, a region where the joint row 6 is arranged and a region where the joint row 6 is not arranged are arranged in parallel in the width direction (X direction). In the present embodiment, as shown in FIG. 4, three non-joining regions 8 are arranged on both sides of the two joint rows 6 and 6. Thereby, the exterior body 2 deform | transforms flexibly with respect to the pressure from a leg part etc. in the crotch part C, joining an absorptive main body firmly. That is, the exterior body 2 absorbs pressure from the undercarriage and prevents it from spreading to the absorbent main body 2. This is because the crotch part C and the absorbent main body 3 can be partially joined by a combination of the exterior body laminated portion 28 and the joint portion row 6. From this viewpoint, the number of arrangement of the joint rows 6 is not limited to that of the present embodiment, and can be appropriately set depending on the size of the diaper, the purpose of use, and the like. For example, a single joint row 6 may be provided at the center in the width direction, or two or more may be provided intermittently.

The diaper 10 having such a structure is provided with excellent stretchability in the waistline portion D due to the interaction of the non-joint band region 4, the auxiliary sheet 5, and the joint portion row 6, and the absorbent main body 3 is stable in the crotch portion C. Are joined together. Thereby, the diaper 10 fits a wearer's body, without twisting at the waist part D, and a shift | offset | difference is prevented. Further, the absorbent main body 3 is not swollen at the crotch part C and is difficult to be separated from the skin by the exterior body laminated portion 28 and the joint row 6. As a result, in the crotch part C that receives the most excreted liquid, the absorbent main body faces the skin and absorbs and holds the liquid firmly, thereby suppressing liquid leakage.
Further, the diaper 10 is provided with flexibility in the crotch C by arranging the joint row 6 in the crotch C partially in the width direction instead of the entire surface. This makes the absorbent body more difficult to drown. Furthermore, with this flexibility and the non-stretching of the crotch part C, it is possible to avoid a tightening of a soft part such as the vicinity of the wearer's crotch and obtain a good wearing feeling.

A pants-type disposable diaper 20 as another preferred embodiment (second embodiment) of the present invention will be described below.
The pants-type disposable diaper 20 of the second embodiment is different from the diaper 10 of the first embodiment in the exterior body, and is combined with the same absorbent main body 3. In FIGS. 9 and 10, members equivalent to the diaper 10 of the first embodiment are denoted by the same reference numerals. As shown in FIG. 9, the outer casing 9 of the diaper 20 includes an I-shaped outer sheet 91 and non-stretchable inner layer sheets 95 and 95 separated into an abdominal side F and a back side R. The outer layer sheet 91 includes stretchable sheets 92 and 92 that can be stretched in the waistline direction that forms the ventral side F and the back side R, and a non-stretchable crotch sheet 93 that forms the crotch C. The stretchable sheet 92 is a rectangle that is long in the width direction (X direction), and the crotch sheet 93 is a rectangle that is long in the longitudinal direction (Y direction). The stretchable sheets 92, 92 and the end of the crotch sheet 93 are partially overlapped to form an I-shaped outer layer sheet 91. The overlapped portion is a non-stretchable portion. This portion is referred to as a bonding portion 94. The laminated portion 94 and the inner layer sheet 95 form a thick exterior body laminated portion 98.
As shown in FIG. 10, between the exterior body 9 and the absorbent main body 3, joint rows 96 and 96 are disposed in the longitudinal direction at the crotch portion with the exterior body laminate portions 98 and 98 as both ends. Is arranged.

Similarly to the diaper 10 of the first embodiment, the diaper 20 includes the non-joint band region 4 and the auxiliary sheet 5 of the abdominal side F and the back side R, and the outer body laminated portion 98 and the joint row at the crotch C. The absorbent main body 3 is bonded and fixed to the exterior body 2 in combination with 6 (see FIG. 10). Moreover, although not shown in figure, as FIG. 2 regarding the diaper 10 shows, the absorptive core 33 is provided with the part with a low basic weight, a recessed part, or a space | gap part, and is made to track elasticity.
As a result, the diaper 20, like the diaper 10 of the first embodiment, stably joins the absorbent main body to the exterior body while maintaining the excellent stretchability of the exterior body, and by stretching the exterior body. The absorbent main body can come into contact with the skin without kinking and prevent liquid leakage.

As a member which comprises the diapers 10 and 20, what is used for this kind of articles | goods can be especially used without a restriction | limiting.
For example, as the stretchable sheet of the outer sheet constituting the exterior body, various sheets having stretchability can be adopted, and those formed from a nonwoven fabric made of thermoplastic fibers are preferable from the viewpoint of improving air permeability. In addition, from the viewpoint of improving the texture, it is also preferable that it is made of a laminated sheet and at least the layer on the non-skin contact surface side is formed of an air-through nonwoven fabric.

  Examples of the stretchable sheet having stretchability include (1) a sheet in which stretchable fiber layers are integrated on both sides or one side of an elastic fiber layer, and (2) both sides or one side of a net-like elastic sheet. A sheet in which stretchable fiber layers are integrated; (3) a sheet in which stretchable fiber layers are integrated on both sides or one side of an elastic sheet made of an elastic film; and (4) without crossing each other. An elastic sheet or the like in which a large number of elastic filaments arranged so as to extend in one direction are bonded to an extensible nonwoven fabric in the non-elongated state over their entire length can be preferably used.

  As the sheet of (1), for example, (a) an inelastic non-elastic fiber layer is arranged on at least one surface of the elastic fiber layer, and both fiber layers are in a state in which the constituent fibers of the elastic fiber layer maintain the fiber form. In the state where all of the constituent fibers of the non-elastic fiber layer are joined into the elastic fiber layer by thermal fusion at the intersection of the fibers, and a part of the constituent fibers of the elastic fiber layer are in the non-elastic fiber layer. Examples include stretchable nonwoven fabrics that are in either or both states. The sheets (1) to (3) include (b) an elastic layer having elastic stretchability and an inelastic nonelastic fiber layer, and the two layers are partially laminated in the thickness direction. A stretchable sheet or the like obtained by stretching the laminated sheet bonded to the substrate can be preferably used. As one means for obtaining these stretched and stretchable fiber layers and nonwoven fabrics (1) to (3), it is preferable to perform the above-described tooth gap processing.

  In the stretchable nonwoven fabric of (a), the intersection between the constituent fiber of the elastic fiber layer and the constituent fiber of the non-elastic fiber layer is heat-sealed at and near the interface between the elastic fiber layer and the non-elastic fiber layer. It is bonded uniformly over the entire surface. By joining all over, it is prevented that both layers are separated and a space is formed, and it becomes a stretchable nonwoven fabric having a multi-layer structure with a sense of unity like a single nonwoven fabric. The state in which the constituent fibers of the elastic fiber layer maintain the fiber form means that even if most of the constituent fibers of the elastic fiber layer are given heat, pressure, etc., a film or a film containing fibers A state that is not transformed into a structure. Further, in the elastic fiber layer, the intersections of the constituent fibers are thermally fused in the layer. Similarly, in the non-elastic fiber layer, the intersection of the constituent fibers is thermally fused in the layer.

When the non-elastic fiber layer is arranged on both surfaces of the elastic fiber layer, at least one of the surfaces of the elastic fiber layer is in a state in which a part of the constituent fiber enters the elastic fiber layer and one of the constituent fibers of the elastic fiber layer. The portion is in one or both of the states in which the portion has entered at least one inelastic fiber layer.
The elastic fiber layer has the property of being stretchable and contracting when released from the stretched force. Further, it is an aggregate of fibers having elasticity. The elastic fiber layer may be in the form of a web or a nonwoven fabric made of elastic fibers. For example, it may be a nonwoven fabric formed by a spinning blow method, a spun bond method, a melt blow method, or the like. Particularly preferred is a web obtained by the spinning blow method. As the constituent fiber of the elastic fiber layer, for example, a fiber made of thermoplastic elastomer, rubber or the like can be used. In particular, fibers made from thermoplastic elastomers can be melt-spun using an extruder in the same way as ordinary thermoplastic resins, and the fibers thus obtained are easy to heat-seal. It is suitable for the stretchable nonwoven fabric of this embodiment having a nonwoven fabric as a basic configuration. Examples of the thermoplastic elastomer include styrene elastomers such as SBS, SIS, SEBS, and SEPS, olefin elastomers, polyester elastomers, and polyurethane elastomers. These can be used individually by 1 type or in combination of 2 or more types.

  The inelastic fiber layer has extensibility but is substantially inelastic. The extensibility here refers to the case where the constituent fibers themselves are stretched, and even if the constituent fibers themselves are not stretched, the two fibers that have been thermally fused at the intersection of the fibers are separated, or the fibers are thermally fused. For example, the three-dimensional structure formed by a plurality of fibers may be structurally changed, the constituent fibers may be broken, and the whole fiber layer may be elongated. Examples of the fibers constituting the inelastic fiber layer include fibers made of polyethylene (PE), polypropylene (PP), polyester (PET or PBT), polyamide, and the like. The fibers constituting the inelastic fiber layer may be short fibers or long fibers, and may be hydrophilic or water repellent. Moreover, a core-sheath type or side-by-side composite fiber, a split fiber, a modified cross-section fiber, a crimped fiber, a heat-shrinkable fiber, or the like can be used. These fibers can be used singly or in combination of two or more. The inelastic fiber layer can be a continuous filament or short fiber web or nonwoven.

  The stretchable sheet (b) is a laminate sheet in which inelastic nonelastic fiber layers are laminated on both sides or one side of an elastic layer having elastic stretchability, and these are partially joined in a regular pattern. It is obtained by subjecting to stretching.

As the non-stretch sheet for the inner sheet and the crotch sheet for the outer sheet that form the outer package, a nonwoven fabric, a laminate of a nonwoven fabric and a resin film, a porous film, and the like are preferable. The non-stretch sheet is preferably formed from a nonwoven fabric made of thermoplastic fibers from the viewpoint of improving air permeability and texture, and is formed from a water-repellent nonwoven fabric from the viewpoint of preventing excrement leakage. Are preferred.
In addition, the outer layer sheet and the outer package made of the inner layer sheet are preferably liquid-impermeable from the viewpoint of leakage prevention, and those having air permeability and water vapor permeability are excessive in the diaper. It is preferable to prevent an increase in humidity.

  As the auxiliary sheet 5, a non-stretchable sheet having air permeability is preferably used and may have water repellency. As this auxiliary sheet 5, for example, a spunbond nonwoven fabric, an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, or the like made of thermoplastic fibers can be used.

  The surface sheet 32 constituting the absorbent main body 3 is preferably a hydrophilic thermal bond nonwoven fabric from the viewpoint of promptly absorbing the excreted bodily fluid and transmitting it to the absorbent body and from the viewpoint of good touch, and particularly preferably an air-through nonwoven fabric. . The top sheet 31 is preferably a thermoplastic resin fiber that has been subjected to a hydrophilic treatment, and the fiber is a fiber that has undergone a three-dimensional crimp such as a secondary crimp or a tertiary crimp. Specifically, polyethylene, polypropylene, polyester, nylon, and composite fibers thereof are prepared, and various hydrophilizing agents are applied at a stage before cutting into a predetermined length to form staples. Hydrophilic agents include various alkyl sulfonates represented by α-olefin sulfonates, acrylates, acrylate / acrylamide copolymers, ester amides, ester amide salts, polyethylene glycol and derivatives thereof, water-soluble Hydrophilic treatment with a hydrophilizing agent known to those skilled in the art, such as a reactive polyester resin, various silicone derivatives, various sugar derivatives, and mixtures thereof, can be used.

  The back sheet 32 is not particularly limited as long as it prevents liquid permeation and has moisture permeability. For example, the inorganic sheet is made of a hydrophobic thermoplastic resin and calcium carbonate or the like, or an incompatible organic polymer. And the like, and a porous film obtained by uniaxially or biaxially stretching the film. Examples of the thermoplastic resin include polyolefin. Examples of the polyolefin include high to low density polyethylene, linear low density polyethylene, polypropylene, polybutene and the like, and these can be used alone or in combination.

  The absorbent core 33 may be a mixture of hydrophilic fibers and superabsorbent polymer particles, or a mixture of hydrophilic fibers, superabsorbent polymer particles and thermoplastic synthetic resin fibers, or between a plurality of fiber sheets. A water-absorbent sheet sandwiched with highly water-absorbing polymer particles, and compressed to a required thickness. As the hydrophilic fiber, a fiber having a hydrophilic surface can be used. Examples of the hydrophilic fiber include cellulose fibers and synthetic fibers that are hydrophilically treated with a surfactant or the like as required. The absorbent core 33 may be entirely covered with a liquid-permeable sheet such as tissue paper or a hydrophilic fiber nonwoven fabric in order to prevent its shape loss and dropping of the polymer particles. As the polymer particles, starch-based, cellulose-based or synthetic polymer-based particles can be used.

  The absorbent article of the present invention may be an unfolded disposable diaper in addition to the pants-type disposable diaper of the above-described embodiment, and is disposed on the stomach side of the wearer such as sanitary shorts, shorts-type napkins, incontinence pants, etc. It is a concept including an absorbent article having a ventral side portion and a back side portion disposed on the back side of the wearer. In addition, other members may be appropriately incorporated in the above configuration in accordance with applications and functions.

  This invention discloses the following absorbent articles and its manufacturing method further regarding embodiment mentioned above.

<1> An exterior body and an absorptive main body disposed on the skin surface side, wherein the exterior body is disposed on the abdomen side of the wearer, and the back side disposed on the back side of the wearer. An absorbent article having a crotch part positioned between the ventral part and the ventral part and the dorsal part,
The exterior body has stretchability that can expand and contract in the waist direction of the wearer on the abdominal side and the back side,
The absorbent body has a non-bonded band region at a portion where the abdomen and back side exterior bodies overlap, and the non-bonded band region spans the entire width direction of the absorbent main body,
On the skin surface side of the absorbent main body, a pair of auxiliary sheets covering both ends in the longitudinal direction is arranged, and the auxiliary sheet extends to the outside of the absorbent main body and the abdominal side and back side. Are joined to the exterior body of the
An absorbent article in which a region where the auxiliary sheet is disposed overlaps with the non-bonding band region.

<2> The absorbent article according to <1>, wherein the non-joint band region overlaps at least partly with an arrangement region of the absorbent core.
<3> The exterior body is formed by laminating an outer sheet and an inner sheet,
The inner sheet is a non-stretchable sheet disposed on the entire surface from the ventral part to the back side part through the crotch part,
The outer sheet is provided with an elastic sheet on each of the abdomen and the dorsal side, and the upper and lower ends of the pair of elastic sheets in the stretched state and the inelastic crotch sheet constituting the crotch part The laminated part is a non-stretchable part that constitutes the crotch part, and the laminated part and the inner layer sheet form a thick exterior laminate part. ,
The outer sheet is joined to the inner layer sheet in an expanded state in the ventral side and the dorsal side,
Between the said crotch part and the said absorptive main body, the junction part row | line | column arrange | positioned by making the said exterior body laminated | stacked part into both ends and being arrange | positioned in the longitudinal direction is arrange | positioned. Sex goods.
<4> The exterior body is formed by laminating an outer sheet and an inner sheet,
The I-shaped outer sheet and the inner layer sheet separated into the belly side part and the back side part, and the outer sheet is a stretchable sheet that can be expanded and contracted in a waistline direction that forms the belly side part and the back side part. And a non-stretch inseam sheet forming the crotch,
The stretchable sheet is a rectangle that is long in the width direction, and the crotch sheet is a rectangle that is long in the longitudinal direction,
The stretchable sheet and the end portion of the crotch sheet are partially overlapped to form the I-shaped outer layer sheet, the bonded portion is a non-stretchable portion, and the bonded portion and the inner layer sheet And has a thick exterior laminate part,
Between <1> or <2>, between the exterior body and the absorbent main body, a joint row arranged in the longitudinal direction at the crotch portion with the exterior body laminate portion as both ends is disposed. The absorbent article as described.
<5> Any one of <1> to <4>, wherein the non-joint band region is also present between a portion of the absorbent main body that is not covered with the auxiliary sheet and the ventral side portion and the dorsal side portion. 2. The absorbent article according to 1.
<6> The absorptive main body and the ventral side portion and the dorsal side portion of the exterior body are joined only at a portion of the longitudinal end edge of the absorbent main body where the absorbent core is not disposed. The absorbent article according to any one of 1> to <5>.
<7> Between the crotch part of the exterior body and the absorbent main body, <1> to <6>, wherein a region where the joint row is arranged and a region where the joint row is not arranged are arranged in the width direction. The absorbent article according to any one of the above.
<8> The absorbent main body has a liquid-permeable top sheet, a water-repellent back sheet, and an absorbent core interposed between both sheets,
The absorptivity according to any one of <1> to <7>, wherein a side sheet is disposed on both sides of the surface sheet on the skin contact surface side so as to extend along a longitudinal direction of the absorbent main body. Goods.
<9> The absorbent article according to <8>, wherein the absorbent core has a constricted portion at a portion located in a crotch portion in a plan view, and has a shape that branches into a plurality as it goes to a back side portion. .
<10> The absorptive main body includes a liquid-retaining absorptive core therein, and the absorptive core is a portion where the absorptive main body overlaps the abdomen and the dorsal side, and has a low basis weight. The absorbent article according to any one of <1> to <9>, which has any one or more of a portion, a concave portion, and a void portion lacking a member.
<11> The absorbent article according to <10>, wherein the portion having a low basis weight, the concave portion, or the gap portion is disposed at an end portion of the absorbent core that overlaps the stretchable sheet.
<12> The absorbent article according to <10> or <11>, wherein a width of the portion having a low basis weight, the concave portion, or the gap is 2 mm or more, preferably 3 mm or more.
<13> The absorbent article according to any one of <10> to <12>, wherein a width of the portion having a low basis weight, the concave portion, or the gap is 30 mm or less, preferably 20 mm or less.
<14> The elastic sheet according to any one of <1> to <13>, wherein the elastic sheet has a folded portion that is folded from the opening edge of the waist opening toward the skin contact surface side and joined to the inner sheet. Absorbent article as described in 1.
<15> The absorbent article according to <14>, wherein the auxiliary sheet is the folded portion that extends to the absorbent core.
<16> The absorbent article according to any one of <1> to <15>, wherein the auxiliary sheet and the absorbent main body are not joined.
<17> The absorbent article according to any one of <1> to <15>, wherein the auxiliary sheet and the absorbent main body are joined.
<18> The absorbent article according to any one of <1> to <17>, wherein the stretchable sheet has a maximum elongation in at least one direction of 100% or more.
<19> The absorbent article according to any one of <1> to <18>, wherein the stretchable sheet has an elongation recovery rate of 70% or more at 100% elongation.
<20> The absorbent article according to any one of <1> to <19>, wherein the stretchable sheet has a maximum elongation of 100% or more and an elongation recovery rate of 70% or more in the width direction.
<21> The absorbent article according to any one of <1> to <20>, wherein the stretchable sheet has a maximum elongation of 50% or less in the longitudinal direction.
<22> The absorbent article according to any one of <1> to <21>, wherein the non-stretchable sheet is ruptured before the elongation recovery rate is 20% or less or 100%.
<23> The absorbent article according to any one of <1> to <22>, wherein the non-stretchable sheet has a maximum elongation of 90% or less.
<24> The non-bonding band region is any one of the items <1> to <23>, in which the absorbent main body is non-bonded on the entire surface with respect to the ventral side portion and the back side portion of the exterior body. Absorbent article as described in 1.
<25> The absorbent article according to any one of <1> to <23>, wherein the non-bonded band region is a region divided into a plurality of portions in the longitudinal direction.
<26> The longitudinal length (H2) of the non-joint band region is 10% or more, preferably 20% or more, with respect to the length (H1) of each of the abdominal part and the dorsal part. The absorbent article according to any one of <1> to <25>.
<27> The longitudinal length (H2) of the non-joint band region is 95% or less, preferably 80% or less, with respect to the length (H1) of each of the abdominal part and the dorsal part. The absorbent article according to any one of <1> to <26>.
<28> The longitudinal length (H4) of the auxiliary sheet covering the absorbent main body is 5% or more with respect to the length (H1) of each of the abdomen and the dorsal side, preferably The absorbent article according to any one of <1> to <27>, which is 10% or more.
<29> The length (H4) in the longitudinal direction that the auxiliary sheet covers the absorbent main body is 50% or less with respect to the length (H1) of each of the abdomen and the dorsal side, preferably The absorbent article according to any one of <1> to <28>, which is 40% or less.
<30> The longitudinal length (H6) at which the auxiliary sheet is joined to the exterior body outside the absorbent main body is longer than the length (H1) of each of the abdominal portion and the back portion. The absorbent article according to any one of <1> to <29>, which is 5% or more, preferably 10% or more.
<31> The length (H6) in the longitudinal direction in which the auxiliary sheet is joined to the exterior body outside the absorbent main body is longer than the length (H1) of each of the abdominal portion and the back portion. The absorbent article according to any one of <1> to <30>, which is 50% or less, preferably 40% or less.
<32> The absorbent article according to any one of <3> to <31>, wherein the joint line is formed using various adhesives such as a hot melt adhesive.
<33> The absorbent article according to <32>, wherein an application amount of the adhesive is 0.3 g / m ² or more, preferably 0.5 g / m ² or more.
<34> The absorbent article according to <32> or <33>, wherein the adhesive is applied in an amount of 8 g / m ² or less, preferably 6 g / m ² or less.
<35> The absorbent sheet according to any one of <1> to <34>, wherein the stretchable sheet is a laminated sheet, and at least a layer on the non-skin contact surface side is formed of an air-through nonwoven fabric. Goods.
<36> The absorbent article according to any one of <1> to <35>, wherein the stretchable fiber layer is integrated with both or one side of the elastic fiber layer.
<37> The absorbent article according to any one of <1> to <35>, wherein the stretchable sheet has a stretchable fiber layer integrated on both sides or one side of a net-like elastic sheet.
<38> The absorbent article according to any one of <1> to <35>, wherein the stretchable sheet is formed by integrating an extensible fiber layer on both sides or one side of an elastic sheet made of an elastic film. .
<39> The elastic sheet, in which a large number of elastic filaments arranged so as to extend in one direction without crossing each other are bonded to an extensible nonwoven fabric over their entire length in a non-extended state. The absorbent article according to any one of> to <35>.
<40> In the stretchable sheet according to <36>, a non-elastic non-elastic fiber layer is disposed on at least one surface of the elastic fiber layer, and both fiber layers have a fiber form of the constituent fibers of the elastic fiber layer. In this state, the entire surface is joined by thermal fusion at the intersection of the fibers, and a part of the constituent fibers of the inelastic fiber layer enters the elastic fiber layer, and a part of the constituent fibers of the elastic fiber layer is inelastic. The absorbent article according to <36>, wherein the absorbent article is a stretchable nonwoven fabric that is in one or both of the states of entering the fiber layer.
<41> The stretchable sheet according to <36> to <38> includes an elastic layer having elastic stretchability and an inelastic nonelastic fiber layer, and the both layers are laminated in the thickness direction. The absorbent article according to any one of <36> to <38>, wherein the laminated sheets that are partially bonded are stretched.
<42> The absorbent article according to <41>, wherein the stretching is tooth gap processing.
<43> The stretchable nonwoven fabric according to <40> has a constituent fiber of the elastic fiber layer and a constituent fiber of the inelastic fiber layer at and near the interface between the elastic fiber layer and the inelastic fiber layer. The absorbent article according to the above <40>, wherein the intersections are heat-sealed and uniformly bonded over the entire surface.

2,9 Exterior body 21,91 Outer sheet 22,92 Stretch sheet 23,93 Inseam sheet 24 Laminating part 25,95 Inner sheet 26,96 Non-stretch sheet 28 Exterior body laminated part 3 Absorbent body 31 Top sheet 32 Back sheet 33 Absorbent core 4 Non-bonding band region 5 Auxiliary sheet 6 Joint row 10, 20 Pants-type disposable diapers

Claims (7)

An exterior body and an absorptive main body disposed on the skin surface side, wherein the exterior body is disposed on the abdomen side of the wearer, a back side part disposed on the back side of the wearer, and An absorbent article having a crotch portion located between the ventral portion and the dorsal portion,
The exterior body has stretchability that can expand and contract in the waist direction of the wearer on the abdominal side and the back side,
The absorbent main body and the ventral portion and the exterior body of the back side portion have both non-bonded band regions, the non-bonded band region spans the entire width direction of the absorbent main body, and It overlaps at least partly with the arrangement region of the absorbent core,
On the skin surface side of the absorbent main body, a pair of auxiliary sheets covering both ends in the longitudinal direction is arranged, and the auxiliary sheet extends to the outside of the absorbent main body and the abdominal side and back side. Are joined to the exterior body of the
An absorbent article in which a region where the auxiliary sheet is disposed overlaps with the non-bonding band region. The exterior body is formed by laminating an outer sheet and an inner sheet,
The inner sheet is a non-stretchable sheet disposed on the entire surface from the ventral part to the back side part through the crotch part,
The outer sheet is provided with an elastic sheet on each of the abdomen and the dorsal side, and the upper and lower ends of the pair of elastic sheets in the stretched state and the inelastic crotch sheet constituting the crotch part The laminated part is a non-stretchable part that constitutes the crotch part, and the laminated part and the inner layer sheet form a thick exterior laminate part. ,
The outer sheet is joined to the inner layer sheet in an expanded state in the ventral side and the dorsal side,
2. The absorbent article according to claim 1, wherein a joint row arranged in the longitudinal direction with the outer package laminated portion as both end portions is disposed between the crotch portion and the absorbent main body.   The absorbent article according to claim 1 or 2, wherein the non-joint band region is also present between a portion of the absorbent main body that is not covered with the auxiliary sheet, and the abdomen and the dorsal side.   The said absorptive main body, the said belly side part of the said exterior body, and the said back side part are joined only in the part in which the said absorptive core is not arranged of the longitudinal direction edge of this absorptive main body. The absorbent article according to any one of the above.   The area | region where the said junction row | line | column is arrange | positioned and the area | region where it is not arranged are arranged in parallel in the width direction between the crotch part of the said exterior body, and the said absorptive main body. The absorbent article as described.   The absorbent main body includes a liquid-retaining absorbent core therein, and the absorbent core is a portion where the absorbent main body overlaps the abdomen and the back side, a portion having a low basis weight, a recess And the absorptive article according to any one of claims 1 to 5 which has any one or more of a void part which lacks a member.   The absorbent article according to claim 6, wherein the portion having a low basis weight, the concave portion, or the gap portion is disposed at an end portion of the absorbent core that overlaps the stretchable sheet.

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