JP2019170730A - Underpants type disposable clothing article - Google Patents

Abstract

To prevent peeling of a nonwoven fabric layer of an exterior body in a root part of a post-treatment tape.SOLUTION: There is provided an underpants type disposable clothing article in which a girth area T of an exterior body 12 has a non-stretchable area A1, and stretchable areas A2 provided on both sides in a width direction WD of the non-stretchable area A1; an outer nonwoven fabric layer 12S and an inner nonwoven fabric layer 12H in the stretchable area A2 and the non-stretchable area A1 have sheet junctions 70 repeatedly provided at intervals in the width direction WD, continuing in a longitudinal direction LD, and bonded by a hot-melt adhesive 14H; a post-treatment tape 90 is provided in the exterior surface of the non-stretchable area A1; and an area rate of the sheet junction 70 in an area 95 over front and rear both sides of base ends of at least body parts 92, 93 in a part overlapping a root part 91 of the post-treatment tape 90 is higher than an area rate of the sheet junction 70 of the stretchable area A2.SELECTED DRAWING: Figure 20

Description

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

  A pants-type disposable wearing article, such as a pants-type disposable diaper, is an integral exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body, and an intermediate portion in the width direction of the exterior body Attached to the inner body covering the front and rear sides of the crotch part, the side seal part joined to both sides of the outer body of the front body and both sides of the outer body of the rear body, the waist opening and the pair of left and right legs What has an opening is common.

  In a general pants-type disposable wearing article, the exterior body elastically expands and contracts in the width direction in the waist area corresponding to the side seal portion and the middle area located between the front and back waist areas. It has a stretchable structure. A typical example of this stretchable structure includes an elongated elastic member provided between the outer nonwoven fabric layer and the inner nonwoven fabric layer along the stretch direction and spaced from each other. The non-woven fabric layer forms a planar stretchable region and plays a role of covering and concealing the elastic member, and the elastic member built in between the outer non-woven fabric layer and the inner non-woven fabric layer generates a force for elastic stretching. It plays a role. The elastic member is fixed in the outer nonwoven fabric layer and the inner nonwoven fabric layer adjacent to both the front and back sides of the elastic member at least at portions located at both ends of the elastic region in the stretched state. By this fixing, the elastic member, the outer nonwoven fabric layer, and the inner nonwoven fabric layer are integrated, and the outer nonwoven fabric layer and the inner nonwoven fabric layer are contracted by the contracting force of the elastic member to include ridges (including ridges. Natural length state only) In addition, the elastic member is formed even when the elastic member is extended. Hereinafter, the elastic member is also simply referred to as a heel, and when the elastic member is extended against the contraction force of the elastic member, the heel is expanded. . Usually, the outer nonwoven fabric layer and the inner nonwoven fabric layer are in a developed state having no wrinkles at the limit of elastic elongation, wrinkles are offset as the elastic member contracts, and wrinkles are most densely observed in the natural length state.

  In such a stretchable structure, if the outer nonwoven fabric layer and the inner nonwoven fabric layer are free from each other, one nonwoven fabric layer may partially or entirely float with respect to the other nonwoven fabric layer, thereby causing unnecessary wrinkles and swelling. Therefore, the outer nonwoven fabric layer and the inner nonwoven fabric layer need to be joined directly or indirectly over almost the whole. Further, in order to produce elasticity by the elastic member, the elastic member extends over the entire expansion / contraction direction of the expansion / contraction region, and at least portions located at both ends of the expansion / contraction direction of the expansion / contraction region are formed on the outer nonwoven fabric layer and the inner nonwoven fabric layer. On the other hand, in the natural length state, the outer nonwoven fabric layer and the inner nonwoven fabric layer need to be contracted as the elastic member contracts. That is, it is necessary to bond the nonwoven fabric layers and fix the elastic member to the nonwoven fabric layers.

  At present, as a means for fixing the elastic member to the nonwoven fabric layer, in most cases, a hot melt adhesive is selected. On the other hand, in order to reduce the amount of hot melt adhesive used, the bonding form between the nonwoven fabric layers is often performed by welding such as ultrasonic welding, but the form performed by the hot melt adhesive is also used firmly. ing. For example, by joining the outer nonwoven fabric layer and the inner nonwoven fabric layer adjacent to the front and back sides of the elastic member via a hot melt adhesive at the passage position of the elastic member, joining between the nonwoven fabric layers and fixing the elastic member to the nonwoven fabric layer In addition to the dual-purpose form, the outer nonwoven fabric layer and the inner nonwoven fabric layer are joined at a longitudinally striped sheet joining portion that is intermittently arranged in the stretching direction, and orthogonal to the stretching direction. The form which joins an outer side nonwoven fabric layer and an inner side nonwoven fabric layer by the horizontal stripe-like sheet | seat junction part arrange | positioned intermittently in the direction to extend | contract substantially in the expansion-contraction direction is known. (See Patent Documents 1 to 6)

  Of these, in the form of adopting a vertically striped sheet joining portion, the sheet joining portion becomes a groove continuous in a direction orthogonal to the expansion and contraction direction in a state where the sheet joining portion is contracted to some extent including a natural length state, and in a non-adhesive portion between the grooves The outer nonwoven fabric layer and the inner nonwoven fabric layer bulge to the same extent in opposite directions (on both sides) to form wrinkles. In this case, since the portion between the ridges and the inner space of the ridges are continuous in the direction orthogonal to the expansion / contraction direction, not only is the air permeability in the direction orthogonal to the expansion / contraction direction excellent, but the appearance is also preferable due to the formation of the aligned ridges. It will be a thing.

  On the other hand, pants-type disposable wearing articles are generally provided with so-called post-processing tape as post-processing means for fixing in a rolled state after use (see, for example, Patent Documents 10 and 11). That is, as such a post-processing tape, it has a belt-like root portion that is fixed to the outer surface of the exterior body and extends in the front-rear direction, and a belt-like main body portion that extends from the waist side of the root portion. Has an adhesive layer that adheres to the outer surface of the exterior body after use. In a general post-processing tape, the main body has a first part extending from the waist side of the root part to the crotch side, and a second part folded back to the waist side at the tip of the first part, A pressure-sensitive adhesive layer is provided on the surface of the first portion facing the root portion and the surface of the second portion facing the first portion. These pressure-sensitive adhesive layers play a role of fixing the root portion, the first portion, and the second portion in the folded state, and after peeling the pressure-sensitive adhesive portions sequentially from the tip of the second portion, the first portion and the second portion It plays the role which affixes 2 parts on the outer surface of an exterior body.

  However, when the joining of the outer nonwoven fabric layer and the inner nonwoven fabric layer in the exterior body is vertically striped at the fixed position of the post-treatment tape, when the post-treatment tape is peeled off or when the tensile force when winding the diaper is too strong The outer nonwoven fabric layer sometimes peeled off from the inner nonwoven fabric layer. In such a state, the outer nonwoven fabric layer will receive the force applied to the root of the post-treatment tape alone, the outer nonwoven fabric layer will break and the post-treatment tape will come off, or be firmly fixed with the post-treatment tape Could be difficult.

  Here, the thing of patent document 11 is what joins an outer side nonwoven fabric layer and an inner side nonwoven fabric layer via a hot-melt-adhesive in the passage position of an elastic member, The intermediate sheet for reinforcement is provided in the inner surface of an outer side nonwoven fabric layer. While firmly bonding and shifting the bonding position from the bonding position of the elastic member, a flexible stretchable structure is obtained while preventing the outer nonwoven fabric layer from peeling off. However, the one described in Patent Document 11 not only requires an intermediate sheet, but also has a problem that a dedicated bonding process is required to firmly bond the portion of the intermediate sheet that overlaps the base of the post-processing tape. There is.

JP 2004-229857 A JP 2013-132331 A JP 2014-209773 A JP 2017-064126 A Japanese Unexamined Patent Publication No. 2017-064133 JP 2017-164034 A Japanese Patent Laying-Open No. 2015-107223 JP-A-2015-128573 Japanese Patent Laying-Open No. 2015-192862 JP 2006-067912 A JP, 2006-01116, A

  Then, the main subject of this invention is preventing a peeling of the nonwoven fabric layer of the exterior body in the base part of a post-processing tape with a simple structure.

The pants-type disposable wearing articles that have solved the above problems are as follows.
<First aspect>
An integral exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body;
An interior body that is attached to the widthwise middle part of the exterior body and covers both front and rear sides of the crotch part,
Side seal parts in which both sides of the outer body in the front body and both sides of the outer body in the back body are joined,
With a waist opening and a pair of left and right leg openings,
The exterior body has a waist area that is a front-rear direction range corresponding to the side seal portion,
The waist region includes an outer non-woven fabric layer and an inner non-woven fabric layer, and a plurality of the non-woven fabric layers extending along the stretch direction, arranged between the outer non-woven fabric layer and the inner non-woven fabric layer with an interval in an orthogonal direction perpendicular to the stretch direction. A slender elastic member of
The outer nonwoven fabric layer and the inner nonwoven fabric layer are repeatedly provided at intervals in the width direction, and have a sheet joining portion joined by a hot melt adhesive or a welding portion continuous in the front-rear direction,
The waist region has a non-stretchable region provided in the middle of the width direction in the front-rear direction range having the interior body, and a stretchable region provided on both sides of the non-stretchable region in the width direction,
The stretchable region has the elastic member and is a region that elastically stretches in the width direction together with the elastic member.
A post-processing tape is provided on the outer surface of the non-stretchable region,
The post-treatment tape includes a belt-like root portion extending in the front-rear direction, fixed to the outer surface of the outer nonwoven fabric layer, a belt-like main body portion extending from the waist opening side of the root portion, and an adhesive provided on the main body portion. Having an agent layer,
In pants-type disposable wearing articles,
The sheet joining portion is provided in each of the stretchable region and the non-stretchable region,
The area ratio of the sheet joint portion in the region including at least the base end of the main body portion in the portion overlapping the root portion of the post-treatment tape is higher than the area ratio of the sheet joint portion of the stretchable region,
A pants-type disposable wearing article characterized by that.

(Function and effect)
The feature of this aspect is that not only the stretchable region but also the non-stretchable region having the post-processing tape is provided with a sheet joint portion, and among these, a portion to which a force is applied particularly in a portion overlapping the root portion of the post-process tape, that is, at least the main body portion The area ratio of the sheet joint portion in the region including the proximal end is higher than the area ratio of the sheet joint portion in the stretchable region. Thereby, the part to which force is applied when using the post-treatment tape is reinforced, and the outer nonwoven fabric layer is less likely to be peeled off from the inner nonwoven fabric layer. As a result, the outer nonwoven fabric layer is hardly broken. Furthermore, in this aspect, it is only necessary to locally change the area ratio of the sheet joint portion at the root portion of the post-processing tape, so that a reinforcing member and a manufacturing process for attaching the reinforcing member are not necessary.

<Second aspect>
The main body portion of the post-processing tape has a first portion extending from the waist opening side of the base portion to the crotch side, and a second portion folded back to the waist opening side at the tip of the first portion. , An adhesive layer is provided on a surface of the first portion facing the root portion and a surface of the second portion facing the first portion, and the first portion is formed by the pressure-sensitive adhesive layer. The first part and the second part are fixed in a folded state on the root part, and the second part is adhered to the first part by the adhesive layer, respectively.
The outer nonwoven fabric layer includes a first region including a position of a base end of the first portion, a boundary position between the first portion and the second portion, and a second region spaced from the first region toward the crotch side. And having an area
The dimension in the width direction of the first region and the second region is 1.0 to 1.5 times the dimension in the width direction of the root portion,
The dimension in the front-rear direction of the first region is 0.1 to 0.5 times the dimension in the front-rear direction of the root portion,
The dimension in the front-rear direction of the second region is shorter than the dimension in the front-rear direction of the first region.
The area ratio of the sheet joint portion in the first region and the second region is higher than the area ratio of the sheet joint portion in the stretchable region,
The pants type disposable wearing article of the first aspect.

(Function and effect)
As a post-treatment tape for a pants-type disposable wearing article, a tape having a main body portion with a folding structure as in this embodiment is generally used. In such a post-processing tape, when the main body of the post-processing tape is peeled off vigorously, when the second part is peeled off and the first part starts to be peeled off, the direction in which the force is applied changes in the reverse direction at the turn-back position. At this time, a relatively large peeling force is applied to the root portion at the folding position, and the outer nonwoven fabric layer may peel from the inner nonwoven fabric layer starting from this position. Further, after the first part has been peeled off, the force concentrates on the base end of the first part. That is, these parts are particularly important parts for supporting the force when the post-treatment tape is peeled off or wound around the diaper.
Therefore, as in this aspect, only the first region including the position of the base end of the first portion and the second region including the turn-back position are less when the area ratio of the sheet joint portion is higher than the stretchable region. This is preferable because the outer nonwoven fabric layer can be effectively prevented from being peeled off by increasing the area ratio of the sheet bonding portion (that is, while suppressing curing). In addition, since the wrinkle is not formed in the non-stretchable region, when the area ratio of the sheet joint portion increases over a wide range of the portion that is not hidden by the post-processing tape, the touch tends to deteriorate, but in this case, the area ratio of the sheet joint portion The first region and the second region in which the height is high are almost hidden by the post-processing tape, and therefore, the influence on the touch is small.

<Third Aspect>
The width direction dimension of the sheet joint portion in the stretchable region is 0.08 to 0.17 times the width direction dimension of the root portion,
The interval in the width direction of the sheet joint portion in the stretchable region is 0.3 to 0.5 times the dimension in the width direction of the root portion,
In the first region and the second region, the dimension in the width direction of the sheet joint portion is 1/2 to 1 times the dimension in the width direction of the sheet joint portion in the stretchable region,
The interval in the width direction of the sheet joint portion in the first region and the second region is 1/6 to ３ times the dimension in the width direction of the sheet joint portion in the stretchable region,
The area ratio of the sheet joint portion in the first region and the second region is 2 to 6 times the area ratio of the sheet joint portion in the stretchable region.
The pants type disposable wearing article of the 2nd mode.

(Function and effect)
The size of the sheet joint portion in the first region, the second region, and the stretchable region, and the size relationship of the area ratio can be determined as appropriate, but in the normal case, the range of this aspect is preferable.

<Fourth aspect>
The outer nonwoven layer, fineness 1.8～6.0Dtex, basis weight 10 to 30 g / m ^2, an air-through nonwoven fabric having a thickness of 0.2 to 1.2 mm,
The pants type disposable wearing article according to any one of the first to third aspects.

(Function and effect)
In recent years, an air-through nonwoven fabric as described in this section is often used as an outer nonwoven fabric layer in order to emphasize the softness of the touch when the product is picked up and the flexibility of the exterior body. When such a low-density and flexible air-through nonwoven fabric is used for the outer nonwoven fabric layer, of course, it has sufficient strength in normal use, but in a portion where stress is concentrated when the post-treatment tape is pulled excessively strongly The fiber bond of the outer nonwoven fabric layer is broken, and the outer nonwoven fabric layer is easily peeled off from the inner nonwoven fabric layer by so-called substrate destruction. Therefore, the reinforcement by the difference in the area ratio of the above-mentioned sheet joint portion is particularly significant in the case of this aspect.

<Fifth aspect>
The non-stretchable region is an unnecessary elastic member composed of at least one of a cutting remaining portion continuous from the elastic member in the stretchable region, and a cut piece of an elastic member not continuous with the elastic member in both the stretchable regions, and cutting of the elastic member A number of cut holes in the nonwoven fabric layer formed at intervals,
A root portion of the post-processing tape is fixed to the non-stretchable region,
The pants type disposable wearing article according to any one of the first to fourth aspects.

(Function and effect)
In the pants-type disposable wearing article, a large number of holes may be formed in the outer nonwoven fabric layer. For example, the waistline region and the intermediate region overlap with the front-rear direction range having the absorber, and there are inner and outer fixing portions for fixing the interior body to the exterior body in the range. Therefore, even if an elastic member is provided so as to cross the range in the front-rear direction having the absorber, its expansion / contraction function is limited by the rigidity of the absorber. In addition, the absorbent body may contract in the width direction, thereby deteriorating the wearing feeling and appearance, and the absorbent body may be twisted or cracked, resulting in a decrease in absorption performance. For this reason, conventionally, an elastic member is attached continuously along the width direction, and a non-stretchable region is formed by finely cutting almost the entire portion overlapping the absorber (for example, a patent) Reference 1, 4, 5).
However, when the non-stretchable region is formed by cutting the elastic member, a cut hole due to cutting or melting of the outer nonwoven fabric layer may be formed, and the presence of the cut hole reduces the strength of the outer nonwoven fabric layer. In particular, when such a cut hole is located at the root of the post-treatment tape, the outer non-woven fabric layer tears after the outer non-woven fabric layer peels from the inner non-woven fabric layer by excessively pulling the post-treatment tape ( Tearing). Therefore, the reinforcement by the difference in the area ratio of the above-mentioned sheet joint portion is particularly significant in the case of this aspect.
Also, when forming the non-stretchable region by cutting the elastic member, if the area ratio of the sheet joint portion is high over a wide range of the non-stretchable region, the elastic member is easily fixed at the sheet joint portion. There is a possibility that contraction of the elastic member is hindered. Therefore, when the non-stretchable region is formed by cutting the elastic member, it is preferable that the adhesion reinforcing portion is limited to a region substantially overlapping with the post-treatment tape as in the second aspect.

<Sixth aspect>
The outer nonwoven fabric layer is a perforated nonwoven fabric in which holes penetrating in the thickness direction are arranged at least over the entire waist region.
The pants type disposable wearing article according to any one of the first to fifth aspects.

(Function and effect)
As described above, in the pants-type disposable wearing article, a large number of holes may be formed in the outer nonwoven fabric layer. For example, in order to mainly improve air permeability, it is known to provide a hole penetrating in the thickness direction in the outer nonwoven fabric layer (see, for example, Patent Documents 7 to 9). In this case, it is preferable in terms of manufacturing that the holes are uniformly provided, but the strength of the outer nonwoven fabric layer is lowered. In particular, if there is a hole in the region including the root portion of the post-processing tape, the outer non-woven fabric layer easily breaks (breaks) after the outer non-woven fabric layer peels from the inner non-woven fabric layer by excessively pulling the post-processing tape. . Therefore, the reinforcement by the difference in the area ratio of the above-mentioned sheet joint portion is particularly significant in the case of this aspect.

<Seventh aspect>
The holes are arranged in a matrix in which rows of holes lined up linearly at intervals in the front-rear direction are repeated at intervals in the width direction,
The interval in the width direction of the row of holes is narrower than the interval in the front-rear direction of the holes,
The pants type disposable wearing article of the 6th mode.

(Function and effect)
If the arrangement of the holes in the perforated nonwoven fabric is such a matrix with a narrow interval in the width direction, the outer nonwoven fabric layer is separated from or simultaneously with the outer nonwoven fabric layer by peeling the post-treatment tape excessively. In particular, it becomes easy to tear (break along the width direction). Therefore, the reinforcement by the difference in the area ratio of the above-mentioned sheet joint portion is particularly significant in the case of this aspect.

  According to the present invention, there is an advantage that the non-woven fabric layer of the exterior body can be prevented from being peeled off at the base portion of the post-processing tape with a simple structure.

It is a top view which shows the inner surface of the underpants type disposable diaper of an expansion | deployment state. It is a top view which shows the outer surface of the underpants type disposable diaper of an unfolded state. It is 2-2 sectional drawing of FIG. FIG. 3 is a 3-3 cross-sectional view of FIG. 1. (A) 4-4 sectional drawing of FIG. 1 and (b) 5-5 sectional drawing of FIG. It is a perspective view (hole omitted) of a pants type disposable diaper. It is a top view which shows the principal part of an unfolded state. It is a top view which shows the outer surface of the underpants type disposable diaper of an unfolded state. (A) 4-4 sectional drawing of FIG. 8 and (b) 5-5 sectional drawing of FIG. It is a top view which shows the example of arrangement | sequence of a hole. It is a top view which expands and shows the principal part of the exterior body of the expansion | deployment state. (A) 6-6 sectional view of Drawing 11, (b) 7-7 sectional view of Drawing 11, and (c) sectional view of a contraction state showing a principal part. It is a top view which expands and shows the principal part of the exterior body of the expansion | deployment state. (A) 6-6 sectional view of Drawing 13, (b) 7-7 sectional view of Drawing 13, and (c) sectional view of a contraction state showing a principal part. (A) Cross-sectional view in the orthogonal direction in the expanded state, (b) Cross-sectional view in the expansion / contraction direction in the expanded state, and (c) Cross-sectional view in the width direction in the contracted state. It is an expanded sectional view of a perforated nonwoven fabric. (A) It is a front view which shows the principal part outer surface of the exterior body of a state of natural length, (b) It is a front view which shows the principal part outer surface of the exterior body of the state extended to some extent. It is a top view which shows the principal part of the back surface of the underpants type disposable diaper of an expansion | deployment state. It is a top view which shows the example of an arrangement | sequence of a cutting hole. It is the (a) top view and (b) sectional view showing the post-processing tape part. It is sectional drawing which shows the state after peeling of the 2nd part of a post-processing tape. It is sectional drawing which shows the state after peeling of the 1st part of a post-processing tape. It is a perspective view which shows the state which rolled and fixed the diaper. It is the (a) top view and (b) sectional view showing the post-processing tape part.

  Hereinafter, an example of a pants-type disposable diaper will be described in detail with reference to the accompanying drawings. The dotted pattern portion in the cross-sectional view shows an adhesive as a joining means for joining the constituent members located on the front side and the back side. Hot melt adhesives can be applied by known methods such as slot coating, continuous line or dotted line bead coating, spiral coating, Z coating, etc., or pattern coating (transfer of hot melt adhesive in relief printing). Can be applied. Instead of or together with this, at the fixing portion of the elastic member, the hot melt adhesive can be applied to the outer peripheral surface of the elastic member, and the elastic member can be fixed to the adjacent member. Examples of hot melt adhesives include EVA, adhesive rubber (elastomer), olefin, and polyester / polyamide types, which can be used without any particular limitation. As a joining means for joining the constituent members, means by material welding such as heat sealing or ultrasonic sealing can be used.

  The pants-type disposable diaper shown in FIGS. 1 to 6 includes a front exterior body 12F that constitutes the front body F, a rear exterior body 12B that constitutes the rear body B, and a rear exterior body from the front exterior body 12F through the crotch portion. An interior body 200 provided inside the exterior bodies 12F and 12B so as to extend to the body 12B. Both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to form a side seal portion 12A. As a result, the openings formed by the front and rear end portions of the exterior bodies 12F and 12B become the waist openings WO through which the wearer's torso passes, and the lower edges of the exterior bodies 12F and 12B and the interior body 200 on both sides in the width direction of the interior body 200. The portions surrounded by the side edges are leg openings LO through which the legs pass. The interior body 200 is a portion that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are portions that support the interior body 200 with respect to the wearer's body. The symbol Y in the figure indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and the symbol X in the unfolded state. The full width of the diaper is shown.

  Further, the outer body 12F, 12B of the pants-type disposable diaper includes a waist region T defined as a front-rear direction range (a front-rear direction range extending from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a leg opening. It has an intermediate region L defined as a front-rear direction range (between the front-rear region having the side seal portion 12A of the front body F and the front-rear region having the side seal portion 12A of the rear body B) of the portion forming the LO. The waistline region T can be divided into a “waist portion” W that conceptually forms the edge of the waist opening and a “waist lower portion” U that is a lower portion than this. Usually, in the case where the waist region WO has a boundary where the stretching stress in the width direction WD changes (for example, the thickness of the elastic member or the elongation rate changes), the waist opening WO side is more waist-like than the waist opening WO side boundary. When there is no such boundary, the waist opening WO side becomes the waist portion W with respect to the absorbent body 56 or the interior body 200. These lengths in the front-rear direction vary depending on the size of the product and can be determined as appropriate. For example, the waist portion W may be 15 to 40 mm, and the waist lower portion U may be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are wrapped in a U-shape or a curved shape along the circumference of the leg of the wearer, and this is a portion into which the wearer's leg is put. As a result, the unfolded pants-type disposable diaper has a substantially hourglass shape as a whole.

(Inner / outer joint)
The fixing of the inner body 200 to the outer bodies 12F and 12B is not particularly limited, and can be performed by, for example, a hot melt adhesive. In the illustrated example, the inner surface of the exterior body 12F, 12B is applied to the back surface of the interior body 200, that is, the back surface of the liquid-impermeable sheet 11 in this case and the hot melt adhesive applied to the root portion 65 of the rising gather 60. Is fixed. The inner / outer joint part 201 that fixes the inner body 200 and the outer bodies 12F and 12B can be provided in almost the entire region where both overlap, for example, the inner body 200 may be provided in a portion excluding both ends in the width direction. it can.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. Yes, it is the main body that takes up the absorption function. Reference numeral 40 denotes an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorbent element 50. Shows a rising gather 60 that extends from both sides of the interior body 200 so as to contact the legs of the wearer in order to prevent excrement from leaking to both sides of the interior body 200.

(Top sheet)
The top sheet 30 has a property of allowing liquid to pass through, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable. If bulkiness and softness are required, the air-through method, point bond method, and thermal bond method are preferable processing methods. .

  The top sheet 30 may be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

  Both side portions of the top sheet 30 may be folded back to the back side at the side edge of the absorbent element 50, or may be projected to the side from the side edge of the absorbent element 50 without being folded back.

  The top sheet 30 may be fixed to a member adjacent to the back side by a joining means by material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive for the purpose of preventing positional deviation with respect to the back side member. desirable. In the illustrated example, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(Intermediate sheet)
An intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided in order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorber. This intermediate sheet 40 not only improves the absorption performance by the absorbent by quickly transferring the liquid to the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, so that the top sheet 30 is always dried. It can be in a state of being. The intermediate sheet 40 can be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond nonwoven fabric, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw fiber of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.

  The intermediate sheet 40 in the illustrated form is disposed in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

  The intermediate sheet 40 may be fixed to a member adjacent to the back side by a bonding means by material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive for the purpose of preventing positional displacement with respect to the back side member. desirable. In the illustrated example, the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorbent body 56 with a hot melt adhesive applied to the back surface thereof.

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric provided with a plastic film on the surface of the nonwoven fabric, or a plastic film For example, a laminated sheet in which a nonwoven fabric or the like is laminated and bonded to each other can be exemplified. The liquid-impermeable sheet 11 is preferably made of a liquid-impermeable and moisture-permeable material that is preferably used from the viewpoint of preventing stuffiness. As a plastic film having moisture permeability, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction. Is widely used. In addition, non-woven fabric using microdenier fibers, leakproof reinforcement by reducing the voids of the fibers by applying heat or pressure, and methods such as coating with a superabsorbent resin or hydrophobic resin or water repellent Thus, a sheet that is liquid-impermeable without using a plastic film can also be used as the liquid-impermeable sheet 11.

  The liquid-impermeable sheet 11 has a width that can be accommodated on the back side of the absorbent element 50 as shown in the drawing, and in order to improve leakage prevention, the liquid-impermeable sheet 11 wraps around both sides of the absorbent element 50 to form the side surface of the top sheet 30 of the absorbent element 50. It can also extend to both sides. The width of this extended portion is suitably about 5 to 20 mm on each of the left and right sides.

(Get up gather)
The rising gather 60 is for preventing side leakage, extends across the entire front-rear direction LD along both side portions of the interior body 200, and stands up from the side of the interior body 200 to the front side. The rising gather 60 in the illustrated example is such that the base side portion rises obliquely toward the center in the width direction, and the tip side portion rises obliquely outward in the width direction from the intermediate portion, but is not limited thereto. However, it is possible to make appropriate changes such as a configuration in which the whole stands up in the center in the width direction.

  More specifically, the rising gather 60 in the illustrated example folds the belt-shaped gathered nonwoven fabric 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction WD at the tip portion and folded in two. In addition to overlapping, a plurality of elongated gather elastic members 63 are fixed along the longitudinal direction and spaced apart in the width direction WD between the folded portion and the sheet in the vicinity thereof. The base end portion (the end portion on the side opposite to the sheet folding portion in the width direction WD) of the rising gather 60 opposite to the front end portion is fixed to the side portion on the back side of the liquid-impermeable sheet 11 in the interior body 200. A portion 65 other than the root portion 65 is a main body portion 66 (a portion on the folded portion side) extending from the root portion 65. The main body portion 66 includes a root side portion extending toward the center in the width direction and a tip side portion that is folded back at the tip of the root side portion and extends outward in the width direction. This form is a surface contact type rising gather 60, but a line contact type rising gather 60 that is not folded outward in the width direction can also be used. And while the both ends of the front-back direction among the main body parts 66 are set to the fall-down part 67 fixed with respect to the side part surface of the top sheet 30 in a lying state, the front-back direction intermediate part located between these is not fixed. The gather elastic member 63 along the front-rear direction LD is fixed in an extended state to at least the tip of the free portion 68.

  In the rising gather 60 configured as described above, the contraction force of the gather elastic member 63 acts so as to bring the both ends in the front-rear direction closer, but the both ends of the main body portion 66 are fixed so as not to stand up. On the other hand, since there is a non-fixed free portion 68 between them, only the free portion 68 stands up so as to abut on the body side as indicated by an arrow in FIG. In particular, when the root portion 65 is positioned on the back side of the interior body 200, the free portion 68 stands up so as to open outward in the width direction at and around the crotch portion, so that the rising gather 60 abuts on the surface around the legs. As a result, the fit is improved.

(Absorption element)
Although the absorption element 50 is not specifically limited, In this example, it has the absorber 56 and the packaging sheet 58 which wraps this absorber 56 whole. The packaging sheet 58 can be omitted.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. It is preferable to disperse and hold superabsorbent polymer particles in the absorber 56.

  The absorber 56 may be rectangular, but as shown in FIG. 7, the absorber 56 includes a front end portion, a rear end portion, and a constricted portion 56 </ b> N that is located between these and narrower than the front end portion and the rear end portion. The hourglass shape is preferred because the fit of the absorber 56 and the rising gather 60 around the legs is improved.

  Further, the size of the absorbent body 56 can be appropriately determined as long as it extends to the front, rear, left, and right of the urination port position, but preferably extends to the peripheral portion of the interior body 200 or the vicinity thereof in the front-rear direction LD and the width direction WD. . Reference numeral 56X indicates the width of the absorber 56.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or all thereof. Superabsorbent polymer particles include “powder” in addition to “particles”. As the superabsorbent polymer particles 54, those used in this type of disposable diaper can be used as they are.

  The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption speed is too slow, the liquid supplied into the absorber 56 is likely to cause a so-called reverse return that returns to the outside of the absorber 56.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² .

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material can be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  The packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of the superabsorbent polymer particles from the front and rear end edges, the cylinder is formed so as to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable that the front and rear edge portions protrude from the front and rear of the absorbent body 56, and the overlapping portion and the overlapping portion of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(Exterior body)
The exterior bodies 12F and 12B include a front exterior body 12F that is a part constituting the front body F and a rear exterior body 12B that is a part constituting the rear body B. The front exterior body 12F and the rear exterior body 12B Are not continuous on the crotch side and are spaced apart in the front-rear direction LD (exterior two-split type). This separation distance 12d can be, for example, about 40 to 60% of the total length Y. Moreover, as shown in FIG.8 and FIG.9, the exterior body 12 can also be made into the integral thing which continues between crotches from the front body F to the back body B (exterior integral type).

  In the exterior two-divided type pants-type disposable diaper, since the interior body 200 is exposed between the front exterior body 12F and the rear exterior body 12B, the liquid-impermeable sheet 11 is not exposed on the back surface of the interior body 200. The cover nonwoven fabric 20 covering the back surface of the interior body 200 is preferably provided between the front exterior body 12F and the interior body 200 and between the rear exterior body 12B and the interior body 200. The material of the cover nonwoven fabric 20 is not particularly limited. For example, the same material as the outer nonwoven fabric layer 12S or the inner nonwoven fabric layer 12H of the outer package 12 (a porous nonwoven fabric layer or a nonporous nonwoven fabric layer described later) may be used. . The front-rear direction range of the cover nonwoven fabric 20 is not particularly limited as long as it has portions overlapping the front exterior body 12F and the rear exterior body 12B, and extends in the front-rear direction LD over the entire front end to rear end of the interior body 200. As shown in FIG. 7, the intermediate position in the front-rear direction of the region where the rear exterior body 12B and the interior body 200 overlap from the front-rear direction intermediate position of the region where the front exterior body 12F and the interior body 200 overlap. It may extend in the front-rear direction LD.

  The exterior bodies 12F and 12B have a trunk periphery region T. In this embodiment, the front exterior body 12F does not have the intermediate region L, but the rear exterior body 12B has a buttock cover region C that extends from the waistline region T to the intermediate region L side. Although not shown, the front exterior body 12F is also provided with a collar cover portion extending from the waistline region T toward the intermediate region L, a configuration in which the inguinal cover portion is provided but the collar cover region is not provided, or the front exterior body 12F and The intermediate region L may not be provided in both of the rear exterior bodies 12B. Further, in the illustrated example, the lower edge of the buttock cover region C is formed in a straight line shape along the width direction WD, similarly to the lower edge of the front exterior body 12F, but is positioned closer to the waist opening as it goes outward in the width direction. It can also be a curve that becomes.

  As shown in FIGS. 3 to 5, the exterior bodies 12F and 12B are formed by laminating an outer nonwoven fabric layer 12S and an inner nonwoven fabric layer 12H. The nonwoven fabric that forms the outer nonwoven fabric layer 12S and the nonwoven fabric that forms the inner nonwoven fabric layer 12H may be individual nonwoven fabrics as in the illustrated example, or may be a single nonwoven fabric. That is, in the latter case, the inner nonwoven fabric layer 12H and the outer nonwoven fabric layer 12S are respectively formed by an inner portion and an outer portion of one nonwoven fabric folded at the waist opening side edge or the crotch side edge.

  When the ends of the nonwoven fabric forming the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H and the front and rear ends of the interior body 200 are exposed to the waist opening WO, the corners of the nonwoven fabric may hit the skin and the touch may be deteriorated. There exists a possibility that an elastic elastic member and the hot-melt-adhesive agent for fixing this may be exposed. Therefore, as shown in the figure, the nonwoven fabric forming the outer nonwoven fabric layer 12S is folded back inward at the edge of the waist opening of the nonwoven fabric forming the inner nonwoven fabric layer 12H to form the skin nonwoven fabric layer 12r. It is preferable to extend the layer 12r to the end of the interior body 200 on the waist side. Although not shown, both the nonwoven fabric forming the outer nonwoven fabric layer 12S and the nonwoven fabric forming the inner nonwoven fabric layer 12H are folded back to the innermost side at the edge on the waist side, and the folded portion extends to the end on the waist side of the interior body 200. It may be extended.

  As constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides (including single-component fibers and composite fibers such as core sheaths) In addition, regenerated fibers such as rayon and cupra, natural fibers such as cotton, and the like can be selected without particular limitation, and these can also be used as a mixture. In order to increase the flexibility of the nonwoven fabric layers 12S and 12H, it is preferable that the constituent fibers are crimped fibers. Further, the constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H may be hydrophilic fibers (including hydrophobic fibers made hydrophilic by a hydrophilizing agent) or hydrophobic fibers or water repellent fibers (water repellent fibers). (Including water-repellent fibers made water-repellent by an agent). Nonwoven fabrics are generally short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bond (air-through) nonwoven fabrics, needle punches, depending on fiber length, sheet formation method, fiber bonding method, and laminated structure. These are classified into non-woven fabrics, point-bonded non-woven fabrics, laminated non-woven fabrics (SMS non-woven fabrics with a melt-blown layer sandwiched between spunbond layers, SMMS non-woven fabrics, etc.). Can do.

Although the fineness and the basis weight of the constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H can be determined as appropriate, they are preferably about 1.8 to 6.0 dtex and about 10 to 30 g / m ² , respectively.

(About perforated nonwoven fabric)
As shown in FIGS. 2, 8, 11, and 12, if at least one of the outer nonwoven fabric layer 12 </ b> S and the inner nonwoven fabric layer 12 </ b> H is a perforated nonwoven fabric in which holes 14 penetrating in the thickness direction are scattered, air permeability is obtained. Although it is preferable because of improvement, a non-porous nonwoven fabric having no holes formed by perforation can be used. As shown in FIGS. 11 and 12, when the inner nonwoven fabric layer 12H on the skin side of the wearer is a non-porous nonwoven fabric and the outer nonwoven fabric layer 12S is a porous nonwoven fabric, the influence on the touch of the holes 14 is eliminated. Can do. Moreover, since the hole 14 is provided in only one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, the skin is not exposed at the time of wearing, and leakage through the hole 14 can be prevented. Although not shown, the inner nonwoven fabric layer 12H on the skin side of the wearer may be a perforated nonwoven fabric, and the outer nonwoven fabric layer 12S may be a nonporous nonwoven fabric. As shown in FIG.13 and FIG.14, both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the hole 14 of one perforated nonwoven fabric and the hole 14 of the other perforated nonwoven fabric do not overlap. A structure is also preferable. In this case, higher air permeability can be obtained by making both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H porous. Moreover, since the hole 14 of one perforated nonwoven fabric and the hole 14 of the other perforated nonwoven fabric do not overlap, the skin is not exposed at the time of wearing, and leakage through the hole 14 can be prevented. As shown in FIG. 15, both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the holes 14 of one perforated nonwoven fabric and the holes 14 of the other perforated nonwoven fabric are completely or partially. May overlap. In addition, although not shown, when both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, in most cases (for example, an area of 50% or more), the holes 14 of one perforated nonwoven fabric and the other perforated nonwoven fabric are formed. Although the hole 14 of the porous nonwoven fabric does not overlap, in some cases, the hole 14 of one porous nonwoven fabric and the hole 14 of the other porous nonwoven fabric may overlap.

  The planar shape (opening shape) of each hole 14 can be determined as appropriate. The hole 14 has a long hole shape as shown in FIG. 10 (b), a perfect circle as shown in FIG. 10 (e), an ellipse, a triangle, and a rectangle as shown in FIGS. 10 (a) and 10 (d). , Polygons such as rhombuses, stars, clouds, etc. As shown in FIG. 10 (c), holes having different shapes may be mixed, but in that case, it is preferable that the dimensions in the expansion / contraction direction ED described later are substantially the same, and all the holes have a single shape. More preferably. The dimensions of the individual holes 14 are not particularly limited, but the dimension 14D in the orthogonal direction XD orthogonal to the expansion / contraction direction ED (the dimension of the longest part) is 0.3 to 3.0 mm, particularly 0.4 to 1.5 mm. It is preferable that the dimension (length of the longest part) 14W in the expansion / contraction direction ED is 0.3 to 5.0 mm, particularly 0.6 to 2.0 mm. When the shape of the hole 14 is a long shape in one direction such as a long hole shape, an ellipse shape, a rectangular shape, a rhombus shape, etc. (a shape in which the total length in one direction is longer than the total length in the direction perpendicular thereto), the dimension in the longitudinal direction It is preferable that (the dimension of the longest part) is 1.2 to 2.5 times the dimension (the dimension of the longest part) in the direction orthogonal thereto. Moreover, when the shape of the hole 14 is long in one direction, the longitudinal direction of the hole 14 is preferably the front-rear direction LD, but may be the width direction WD or an oblique direction.

Although individual area and the area ratio of the holes 14 may be appropriately determined, it is preferable that the area is 0.1~2.7mm ² (especially 0.1 to 1.0 mm ²⁾ about, the area ratio 1. It is preferably about 0 to 15.0% (particularly 5.0 to 10.0%).

  The planar arrangement of the holes 14 can be determined as appropriate as long as the rows of the holes 14 arranged at intervals in the direction orthogonal to the expansion / contraction direction ED are arranged at intervals in the expansion / contraction direction ED. For example, as shown in FIGS. 10A, 10C, and 10D, the holes 14 are arranged in such a manner that the rows of holes 14 linearly arranged at a predetermined interval in the orthogonal direction XD have a predetermined interval in the expansion / contraction direction ED. It is preferable that the matrix is repeated. In this case, as shown in FIG. 10 (a), the interval 14x in the expansion / contraction direction ED is shorter than the interval 14y in the orthogonal direction XD, and as shown in FIG. 10 (c), the interval 14x in the expansion / contraction direction ED. And an interval 14y between the orthogonal direction XD and the interval 14x in the expansion / contraction direction ED may be longer than the interval 14y in the orthogonal direction XD, as shown in FIG. Further, as shown in FIGS. 10B and 10E, the rows of the holes 14 linearly arranged at a predetermined interval in the orthogonal direction XD are spaced from each other in the expansion / contraction direction ED so that the positions in the orthogonal direction XD are shifted. It can be arranged in a line. The example shown in FIG. 10B is a so-called zigzag (hexagonal lattice) arrangement in which the holes 14 are alternately arranged in the row of adjacent holes 14.

  The orthogonal direction interval 14y and the expansion / contraction direction interval 14x of the holes 14 may be constant or may vary. Although the orthogonal direction interval 14y and the expansion / contraction direction interval 14x of the holes 14 can be determined as appropriate, in consideration of air permeability, 14y is 2.5 to 10.0 mm, 14x is 1.0 to 5.0 mm, and particularly 14y is It is desirable that 3.0 to 5.0 mm and 14x are in the range of 1.0 to 2.0 mm.

  The cross-sectional shape of the hole 14 is not particularly limited. For example, as shown in FIGS. 16 (a) to 16 (c), the hole 14 is a punching type hole whose periphery is formed by a cut end of the fiber as shown in FIG. 16 (d). 14 may be a non-punched hole 14 (the edge has a high fiber density) formed by having almost no cut ends of the fiber at the periphery of 14 and a pin inserted between the fibers and spread. As shown in FIG. 16D, the punching type hole may be smaller as the diameter of the hole 14 goes to the middle in the thickness direction, or smaller as it goes to the one side in the thickness direction. . In addition, the diameter of the hole 14 means a dimension in a direction passing through the center of gravity of the hole and orthogonal to the expansion / contraction direction (therefore, the diameter is a circle for a circle and the ellipse is a major axis). Further, the decrease in the diameter of the hole 14 in the thickness direction means that the diameter of the hole 14 continues to decrease over the entire thickness direction of the nonwoven fabric layer, and that the decrease in the diameter of the hole 14 almost disappears in the middle of the thickness direction. Is also included.

  The non-punched hole 14 is such that the diameter of the hole 14 decreases from the pin insertion side toward the opposite side. In such a non-punched hole, as shown in FIGS. 16 (a) and 16 (c), a fiber is pushed out to the edge of the hole 14 on the side opposite to the pin insertion side and pushed out to the side opposite to the pin insertion side. The part (burr) 14e is formed, and the protrusion 14e is not formed on the pin insertion side, and the fiber is inserted into the edge of the hole 14 on the side opposite to the pin insertion side as shown in FIG. The protrusion 14e pushed out to the opposite side is formed, and the pin insertion side includes the protrusion 14e formed by pushing out the fiber to the pin insertion side. Further, in the former type of hole 14, the protrusion 14 e has a substantially uniform height 14 h as shown in FIG. 16A, and the protrusion 14 e as shown in FIG. This includes a facing portion having the highest protruding height 14i and a facing portion facing in a direction perpendicular to the protruding portion and having the lowest protruding height 14j. Although it is desirable that the protruding portion 14e has a cylindrical shape continuously in the circumferential direction of the hole, the protruding portion 14e of a part or all of the holes 14 is formed only in a part of the circumferential direction of the hole 14. Also good. The protruding heights 14h, 14i, and 14j (apparent height in a state where no pressure is measured using an optical microscope) is preferably about 0.2 to 1.2 mm. The highest protrusion height 14i in the protrusion 14e is preferably about 1.1 to 1.4 times the lowest protrusion height 14j. The protruding height of the protruding portion 14 e may change in the circumferential direction of the hole 14.

  For example, when a hole 14 having a long shape in one direction as shown in FIGS. 10A, 10B, and 10D is formed by inserting a pin, fibers at the edge of the hole 14 are retracted outward or vertically. A protrusion (burr) 14e is formed in which the protrusion height 14i of the opposing portion in the longitudinal direction of the hole 14 is higher than the protrusion height 14j of the opposing portion in the direction orthogonal to the longitudinal direction. The protruding portion 14e of the hole 14 may have a fiber density that is lower than that of the surrounding portion, but is preferably the same or higher.

The fineness, basis weight and thickness of the constituent fibers of the perforated nonwoven fabric can be determined as appropriate, but in the normal case, about 1.8 to 6.0 dtex, about 15 to 25 g / m ^{2 and} about 0.1 to 1.3 mm, respectively. Is preferable. Further, the MD softness of the perforated nonwoven fabric (width direction) is preferably 35 to 100 mm, particularly 40 to 70 mm in a non-porous state before perforation, and 10 to 50 mm in a state after perforation. In particular, the thickness is preferably 15 to 40 mm.

(Elastic area)
In the exterior bodies 12F and 12B, an elongated elastic member 19 is provided between the nonwoven fabric layers 12S, 12H, and 12r, and an expansion / contraction region A2 that elastically expands and contracts in the width direction WD as the elastic member 19 expands and contracts is formed. . That is, in this stretchable region A2, the width direction WD is the stretch direction ED, and the front-rear direction LD is the orthogonal direction XD orthogonal to the stretch direction ED. Further, in the stretchable region A2, the nonwoven fabric layers 12S, 12H, and 12r contract in accordance with contraction of the elastic member 19 in a natural length state, and have a large number of wrinkles 80. Further, when the stretchable region A2 is stretched in the width direction WD, the nonwoven fabric layers 12S, 12H, and 12r are stretched to a predetermined stretch rate that can be stretched without wrinkles 80. The elastic member 19 can be used in any shape, e.g., a thread shape, a string shape, and a belt shape, as long as it is elongated. The elastic member 19 may be made of synthetic rubber or natural rubber.

  The exterior body 12 having the stretchable region A2 requires bonding between the nonwoven fabric layers 12S, 12H, and 12r and fixing of the elastic member 19 to the nonwoven fabric layers 12S, 12H, and 12r. That is, in the elastic member 19 sandwiched between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the illustrated example, at least both ends of the stretching direction ED in the stretching region A2 are fixed to the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. . The fixing means for the elastic member 19 is not particularly limited, but it is preferable to use the hot melt adhesive 19H. For example, as shown in FIGS. 11 and 12, after the hot melt adhesive 19H is intermittently applied to the outer peripheral surfaces of both ends of the elastic member 19 in the expansion / contraction direction ED by an application means such as a comb gun or a sure wrap nozzle, The elastic member 19 can be sandwiched between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. In this case, the elastic member 19 is fixed to the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H via the hot melt adhesive 19H at both ends of the elastic member 19 in the stretching region in the stretching region. As shown in FIGS. 13 and 14, after the hot melt adhesive 19H is applied to the arrangement positions of both ends of the elastic member 19 in the expansion / contraction direction ED on at least one of the opposing surfaces of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. The elastic member 19 can also be sandwiched between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. In this case, the hot-melt adhesive 19H may be continuous in the orthogonal direction XD as illustrated, or may be intermittently disposed in the orthogonal direction XD. Further, in these cases, the continuous portion of the hot melt adhesive 19H may extend over a plurality of elastic members. Moreover, like the elastic member 19 sandwiched between the skin nonwoven fabric 12r and the inner nonwoven fabric layer 12H in the example shown in FIG. 5, the skin nonwoven fabric 12r and the inner nonwoven fabric through the hot melt adhesive throughout the width direction WD. It may be fixed to the layer 12H.

In the case of a pants-type disposable diaper like the illustrated example, it is desirable to provide the elastic member 19, that is, the stretchable region A2, in the following site. That is, the plurality of waist elastic members 17 are attached to the waist portions W of the exterior bodies 12F and 12B at intervals in the front-rear direction so as to be continuous over the entire width direction WD. Moreover, about the 1 or several arrange | positioned by the area | region adjacent to the waist lower part U among the waist part elastic members 17, you may overlap with the interior body 200 or the width direction center which overlaps with the interior body 200 You may provide each in the width direction both sides except a part. The waist elastic member 17 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1. the rubber thread 0mm approximately ²⁾ is preferably provided about 3 to 22 present at intervals of 4 to 12 mm, which by extension ratio in the width direction WD of the waist portion W is 150% to 400%, especially at about 220 to 320 percent Preferably there is. Further, the waist portion W does not need to use the same thickness waist portion elastic member 17 in all of the front-rear direction LD or have the same elongation rate. The thickness and elongation rate may be different. In the example shown in FIG. 5, the waist elastic member 17 is provided between the skin nonwoven fabric 12r and the inner nonwoven fabric layer 12H. However, as shown in FIG. 9, the waist elastic member 17 is interposed between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H. It may be provided.

  Further, a plurality of waist lower part elastic members 15 made of an elongated elastic member are attached at intervals in the front-rear direction between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the waist lower part U of the exterior bodies 12F and 12B. It has been.

The waist lower part elastic member 15 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1. the rubber thread 0mm about ^2), 1 to 15 mm, particularly preferably to dispose 5-30 present at intervals of 3 to 8 mm, this elongation in the width direction WD of the waist lower portion U by 200 to 350%, in particular It is preferably about 240 to 300%.

  Further, a plurality of cover elastic members 16 made of an elongated elastic member are attached at intervals in the front-rear direction between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the buttock cover region C of the rear exterior body 12B. ing.

The cover elastic member 16 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1.0 mm. ^It is preferable that about 2 to 10 thread rubbers are provided at intervals of 5 to 40 mm, particularly 5 to 20 mm, and the elongation ratio of the cover portion in the width direction WD is 150 to 300%, particularly 180 to 260. % Is preferred.

  In the case of providing a groin cover portion on the front exterior body 12F, a cover portion elastic member can be similarly provided.

(Non-stretchable area)
In the case where the elastic members 15 and 16 are provided in the front-rear direction range having the absorber 56 like the waist lower part U and the buttock cover region C in the illustrated example, part or all of the elastic members 15 and 16 in the width direction WD of the absorber 56. In order to prevent shrinkage, the intermediate in the width direction (preferably including the entire inner / outer joint portion 201) including part or all of the portion overlapping the absorber 56 and the width direction WD is defined as the non-stretchable region A1, and the width direction It is preferable that both sides are made into the stretchable region A2. The waist portion W is preferably the stretchable region A2 over the entire width direction WD, but similarly to the waist lower portion U, a non-stretchable region A1 may be provided in the middle in the width direction.

  The stretchable region A2 and the non-stretchable region A1 supply the elastic members 15 and 16 between the inner nonwoven fabric layer 12H and the outer nonwoven fabric layer 12S, and the elastic members 15 and 16 are at least both ends in the stretchable direction ED in the stretchable region A2. In the region that becomes the non-stretchable region A1, the elastic members 15 and 16 are pressed and applied at one place in the middle of the width direction in the region that becomes the non-stretchable region A1. It can be constructed by cutting by heating, or by cutting almost the entire elastic members 15 and 16 finely by pressurization and heating, leaving the stretchability in the stretchable region A2 and killing the stretchability in the non-stretchable region A1. . In the former case, as shown in FIG. 4, the non-stretchable region A1 has an outer nonwoven fabric in a state in which the uncut stretched region A2 is continuously cut from the elastic members 15 and 16 of the stretchable region A2 to the natural length alone as the unnecessary elastic member 18. In the latter case, it remains between the layer 12S and the inner nonwoven fabric layer 12H, and as shown in FIG. 18, the remaining cut continuous from the elastic members 15 and 16 in the elastic region A2, and the elastic members 15 in both elastic regions A2, The cut piece of the elastic member which is not continuous with 16 is left between the outer nonwoven fabric layer 12 </ b> S and the inner nonwoven fabric layer 12 </ b> H in a state where the cut piece of the elastic member is contracted to the natural length alone as the unnecessary elastic member 18.

  As the cutting method of the elastic member 19, any known method such as a method using heating and pressurization, a method using a cutting blade, or the like can be employed. In this case, as shown in FIG. 18, the cut hole 13 may or may not be formed in at least one nonwoven fabric layer 12S, 12H, 12r at the cutting position. When the cut hole 13 is formed, as shown in FIG. 18A, even if the cut hole 13 has almost no gap like a slit, as shown in FIG. It may be a cutting hole 13 opened to some extent, such as that according to the above.

  When the elastic member 19 is cut finely by pressurization and heating in almost the entire non-stretchable region A1, the arrangement of the positions of the cutting holes 13 formed thereby (that is, cutting positions) is not particularly limited, and any known arrangement may be used. Can be adopted. For example, as shown in FIG. 19A, an array in which the center points of the cutting holes 13 are in a rhombic lattice shape, or an array in which the center points are in a hexagonal lattice shape as shown in FIG. 19), an array in which the center points of the cutting holes 13 are in a square lattice shape as shown in FIG. 19C, and an array in which the center points of the cutting holes 13 are in a rectangular lattice shape as shown in FIG. As shown in FIG. 19 (e), the center point of the cutting hole 13 is a parallel lattice (as shown in the figure, two groups are provided so that a large number of groups of parallel diagonal rows intersect each other). However, the arrangement is not limited to this. However, the arrangement is regularly repeated, such as an arrangement in which these are inclined at an angle of less than 90 degrees with respect to the front-rear direction.

  The shape of the cutting hole 13 is not particularly limited, and can be any shape such as a perfect circle, an ellipse, a triangle, a rectangle, a rhombus, or a convex lens, a concave lens, a star, a cloud, etc. It is preferably a shape that extends long in one direction, such as a linear shape (slit), a rectangular shape, a long hole shape, and an elliptical shape. The direction of the cutting hole 13 in this case can also be determined as appropriate, but in order to ensure the cutting of the elastic member 19, it extends in the front-rear direction as in the example shown in FIGS. 19 (a) (b) (e). It is preferable to arrange them so as to extend in a direction inclined at an angle of less than ± 45 degrees with respect to the front-rear direction, as in the example shown in FIGS.

  The dimensions of the individual cutting holes 13 are not particularly limited, but the dimension 13L in the front-rear direction LD is preferably 2 to 7 mm, particularly preferably 2.5 to 3.5 mm, and the dimension 13W in the width direction WD is 0 mm (in the case of a slit). ) Is preferred. In addition, the arrangement of the cut holes 13 is preferably an arrangement in which rows of holes arranged at intervals in the width direction are repeated alternately or in the front-rear direction while the positions in the width direction are shifted. In this case, it is preferable that the holes of the rows adjacent in the front-rear direction are mutually coincident (see the example in FIG. 19), close, or overlap (see the example in FIG. 18). Moreover, although the space | interval 13x of the width direction WD of the cutting hole 13 can be determined suitably, it is preferable to set it as 6-15 mm, especially 8-12 mm.

  The non-stretchable region A1 may be formed by cutting the elastic member 19 continuing from the stretchable region (the unnecessary elastic member 18 remains), or by not providing the elastic member 19 (the unnecessary elastic member 18 does not remain). .

(Post-processing tape)
As shown in FIGS. 2, 4, 5, 9, and 18, a post-processing tape 90 is provided on the outer surface of the non-stretchable region A1 of the rear exterior body 12B. That is, as shown in FIGS. 20 and 24, the post-processing tape 90 includes a belt-like root portion 91 that extends in the front-rear direction LD and is fixed to the outer surface of the outer nonwoven fabric layer 12S of the exterior body 12 with an adhesive 94 or the like. The band-shaped main body portions 92 and 93 extending from the waist side of the root portion 91 and the adhesive 94 provided on the main body portions 92 and 93 are provided. At the time of disposal of the diaper, the diaper is rolled or folded so that the front sheet 30 is on the inside and the front body F is on the inside, and then the main body portions 92 and 93 of the post-treatment tape 90 are peeled off, and then the main body portion 92, As shown in FIG. 23, 93 is wound from the back body B of the rolled or folded diaper 100 over the waist opening WO to the outer surface on the opposite side, and fixed to the outer surface of the exterior body 12 by the adhesive 74. Thereby, as shown in FIG. 23, a diaper can be fixed to the state rounded or folded.

  The main body portions 92 and 93 of the post-processing tape 90 include a first portion 92 that extends from the waist opening WO side of the root portion 91 to the crotch side, and a second portion 93 that is folded back to the waist opening WO side at the tip of the first portion 92. The adhesive 94 is provided on the surface of the first portion 92 facing the root portion 91 and the surface of the second portion 93 facing the first portion 92, respectively. Is adhered to the root portion 91 by the adhesive 94 and the second portion 93 is adhered to the first portion 92 by the adhesive 94, whereby the first portion 92 and the second portion 93 are fixed in the folded state. It is preferable. In this case, the root portion 91 and the main body portions 92 and 93 are formed by connecting a plurality of sheets S1 to S4 as shown in FIG. 20, and are formed by a single sheet as shown in FIG. You can also. When the root portion 91 is formed by connecting a plurality of sheets, the number of sheets is not particularly limited, and in the example illustrated in FIG. 20, the sheet is configured with four sheets, but is configured with fewer or more sheets. You can do it. When the post-processing is performed, the first portion 92 and the first portion 92 and the first portion 92 and the first portion 92 are formed by pulling the front end portions of the main body portions 92 and 93 and pulling them toward the waist opening WO as shown in FIGS. The two portions 93 are peeled in order and developed. When the main body portions 92 and 93 are tilted to the waist opening WO side simultaneously with or after deployment, the adhesive of the second portion 93 faces the exterior body 12.

  The example shown in FIG. 20 will be described in more detail. In this post-processing tape 90, the first sheet is coated with an adhesive 94 on the surface on the exterior body 12 side and fixed to the outer surface of the exterior body 12 by this adhesive 94. The first sheet S1, the second sheet S2 connected to the front end portion folded back to the outside of the first sheet S1, and the third sheet S3 fixed to the front end portion folded back to the outside of the second sheet S2. While a folded (Z-shaped cross section) structure is formed, the second sheet S2 is detachably bonded to the first sheet S1 by the adhesive 94 applied to the surface on the first sheet S1 side, and the third sheet S3 is The second sheet S2 is detachably bonded to the second sheet S2 by the adhesive 94 applied to the surface on the second sheet S2 side. The surface opposite to the adhesive 94 side of each sheet S1 to S3 can be peeled by being subjected to a peeling process such as a release agent, and the part where the adhesive 94 between the sheets S1 to S3 is bonded to each other, The adhesive part with respect to the exterior body 12 is connected so as not to peel off. Further, a colored tape S4 colored in an opaque color such as white is connected to the tip of the third sheet S3 by an adhesive 94, so that a knob portion with good visibility (in the example shown in FIG. 24, a single sheet is used). Is formed in an opaque color different from other portions). At the time of disposal, the diaper is rounded or folded so that the top sheet 30 is on the inside and the front body F is on the inside, and then the post-treatment tape 90 is peeled and spread, and as shown in FIG. The folded diaper 100 is fixed by the adhesive 94 of the third sheet S3 so as to be wound from the rear body B of the folded diaper 100 to the opposite outer surface over the waist opening WO.

  The dimensions of the post-treatment tape 90 are not particularly limited, but considering the ease of picking, the stability when the diaper is fixed in a rolled state, the influence on the feeling of wearing, etc., the main body portions 92 and 93 and the attached tapes 90 and 93 are attached. The dimension 91W in the width direction WD of the root 91 is about 11 to 15 mm, the dimension 91L in the front-rear direction LD of the root 91 is about 55 to 70 mm, and the dimension 90L in the front-rear direction LD in the unfolded state of the main bodies 92 and 93 is It is preferably about 1.4 to 1.7 times the dimension 91L of the longitudinal LD of 91.

  As a material for the root portion and the main body portion, for example, an olefin resin such as polyethylene or polypropylene, or a synthetic resin sheet such as polyvinyl chloride or PET can be preferably used, but it is not particularly limited.

  The adhesive 94 is not particularly limited, and a synthetic rubber adhesive, a natural rubber adhesive, an acrylic resin adhesive, a silicon resin adhesive, or the like can be used.

  As long as it has the root part 91 and the main-body parts 92 and 93, the other well-known post-processing tape 90 can also be employ | adopted. Moreover, the attachment position of the post-processing tape 90 is not specifically limited as long as it is the outer surface of the exterior body 12, and can be provided in an appropriate place. Although the post-processing tape 90 is generally provided on the back body B as shown in the drawing, it may be provided on the front body F or on both the back body B and the front body F.

(Junction structure of outer nonwoven fabric layer and inner nonwoven fabric layer)
The outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H have a sheet joining portion 70 joined by a hot melt adhesive 14H continuous in the front-rear direction LD or a welded portion, which is repeatedly provided at intervals in the width direction WD. Yes. As described above, when the sheet bonding portion 70 made of the hot melt adhesive 14H is formed with an interval in the expansion / contraction direction ED, air permeability and flexibility can be ensured. Further, in the stretchable area A2, when the sheet joint portion 70 is formed by applying the hot melt adhesive 14H in a striped pattern that is spaced apart in the width direction WD and continuous in the front-rear direction LD, As shown in FIG. 17, in a state where the sheet is contracted to some extent including the long state, the sheet bonding portion 70 becomes a groove continuous in the front-rear direction LD, and the outer nonwoven fabric layer 12 </ b> S and the inner nonwoven fabric layer 12 </ b> H are non-bonded portions between the grooves. Bulge to the same extent in opposite directions (both front and back sides) to form ridges 80. In the non-stretchable region A1, the shrinkage force does not act on the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, and the wrinkles 80 are not formed by being pulled on both sides in the width direction by the stretchable regions A2 on both sides in the width direction.

  The hot melt adhesive 14 </ b> H may be continuous over the entire orthogonal direction XD of the stretchable region A <b> 2, but may be continuous only in a part of the range intersecting with the plurality of elastic members 19. The skin nonwoven fabric layer 12r and the inner nonwoven fabric layer 12H may be joined with the same structure as that of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, but may have a different joining structure. For example, as in the example shown in FIG. 5, the skin surface nonwoven fabric layer 12 r and the inner nonwoven fabric layer 12 H include a hot melt adhesive applied over the entire width direction to the arrangement position of the waist elastic member 17, and a wide range of opposing surfaces. (For example, up to a range overlapping with a part of the crotch side of the waist elastic member as in the illustrated example) may be joined via a hot melt adhesive 14H (see FIG. 5) applied spirally. .

  Characteristically, as in the example shown in FIG. 18, not only the stretchable region A2 but also the non-stretchable region A1 having the post-processing tape 90 is provided with the sheet joint portion 70, and as shown in FIGS. 20 and 24. As described above, the area ratio of the sheet bonding portion 70 in the region 95 including at least the base ends of the main body portions 92 and 93 in the portion overlapping the root portion 91 of the post-processing tape 90 is larger than the area ratio of the sheet bonding portion 70 in the stretchable region A2. Is also high. Thereby, the part to which a force is applied when using the post-processing tape 90 is reinforced, and the outer nonwoven fabric layer 12S is less likely to be peeled off from the inner nonwoven fabric layer 12H. As a result, the outer nonwoven fabric layer 12S is hardly broken. Furthermore, in this aspect, since the pattern of the sheet joining portion 70 only needs to be locally changed at the root portion 91 of the post-processing tape 90, a reinforcing member and a manufacturing process for attaching the reinforcing member are not necessary.

  The area ratio of the sheet bonding portion 70 in the region 95 extending at least on both the front and rear sides of the base ends of the main body portions 92 and 93 in the portion overlapping the root portion 91 of the post-processing tape 90 is larger than the area ratio of the sheet bonding portion 70 in the stretchable region A2. Although it will not specifically limit if it is high, Usually, it is preferable that it is about 2-6 times, especially about 3-5 times the area ratio of the sheet | seat junction part 70 of expansion-contraction area | region A2.

  Such a difference in the area ratio of the sheet bonding portion 70 can be formed by making at least one of the width 70W and the interval 70x of the sheet bonding portion 70 different.

  The dimension in the front-rear direction LD of the region 95 including at least the base ends of the main body portions 92 and 93 in the portion overlapping the root portion 91 of the post-processing tape 90 can be determined as appropriate depending on the degree of reinforcement, but is 10 mm or more. Preferably, it is more preferably 15 mm or more. In particular, as in the example shown in FIG. 20, when the base ends of the main body portions 92, 93 are separated from the crotch side from the edge of the root portion 91 on the waist opening WO side, It is preferable that the area ratio of the sheet bonding portion 70 in the region 95 extending at least on both the front and rear sides of the base ends of the main body portions 92 and 93 in the overlapping portion is higher than the area ratio of the sheet bonding portion 70 in the stretchable region A2.

  As long as the area where the sheet bonding portion 70 has a high area ratio is provided in the area 95 including at least the base ends of the main body portions 92 and 93 in the portion overlapping the root portion 91 of the post-processing tape 90, the root portion of the post-processing tape 90 is provided. It is good also as an area | region which fits in the part which overlaps 91, and as shown in FIG.20 and FIG.24, it protrudes in the width direction both sides of the part which overlaps with the base part 91 of the post-processing tape 90, or the waist opening WO side (namely, outside). It may be a region (however, since the area ratio of the sheet bonding portion 70 needs to be lower than the stretchable region A2, the non-stretchable region A1 is maximized), or may be provided at a plurality of locations.

  Further, in the case where the post-processing tape 90 is the example shown in FIGS. 20 and 24, when the main body portions 92 and 93 of the post-processing tape 90 are peeled off vigorously, the second portion 93 is peeled off as shown in FIG. When the part 92 starts to be peeled off, the direction in which the force is applied changes in the reverse direction at the turn-back position. At this time, a relatively large peeling force is applied to the root portion 91 at the folded position, and the outer nonwoven fabric layer 12S may peel from the inner nonwoven fabric layer 12H starting from this position. Further, after the first portion 92 has been completely peeled off, the force concentrates on the proximal end of the first portion 92. That is, these parts are particularly important parts for supporting the force when the post-processing tape 90 is peeled off or wound around the diaper.

  Therefore, in such a case, a first region 96 and a second region 97 described below are defined in the outer nonwoven fabric layer 12S, and the area ratio of the sheet bonding portion 70 in the first region 96 and the second region 97 is set to the stretch region A2. It is preferable to make it higher than the area ratio of the sheet bonding portion 70. That is, as shown in FIGS. 20 and 24, the first region 96 is a region including the position of the proximal end of the first portion 92, and the second region 97 is a region between the first portion 92 and the second portion 93. It is a region including the position of the boundary and spaced from the first region 96 to the crotch side. The dimensions 96W and 97W in the width direction WD of the first region 96 and the second region 97 are the dimensions 91W in the width direction WD of the root portion 91. The dimension 96L in the front-rear direction LD of the first region 96 is 0.1-0.5 times the dimension 91L in the front-rear direction LD of the root portion 91, and the second region 96 The dimension 97L of the region 97 in the front-rear direction LD is shorter than the dimension 96L of the first region 96 in the front-rear direction LD. For example, the dimension 97L of the second region 97 in the front-rear direction LD can be about 0.8 times the dimension 96L of the first region 96 in the front-rear direction LD. As described above, when only the first region 96 including the position of the base end of the first portion 92 and the second region 97 including the folding position are higher than the stretchable region A2, the area ratio of the sheet bonding portion 70 is more. This is preferable because the outer nonwoven fabric layer 12S can be effectively prevented from being peeled off with a small increase in the area ratio of the sheet bonding portion 70 (that is, while suppressing curing). Further, since the ridge 80 is not formed in the non-stretchable region A1, the touch ratio tends to be deteriorated when the area ratio of the sheet bonding portion 70 is increased over a wide range of the portion that is not hidden by the post-processing tape 90. Since most of the first region 96 and the second region 97 in which the area ratio of the portion 70 is high is hidden by the post-processing tape 90, the influence on the touch is small.

  The size of the sheet joining portion 70 in the first region 96, the second region 97, and the stretchable region A2 and the size relationship of the area ratio can be determined as appropriate, but in the normal case, the following range is preferable. That is, the dimension 70W in the width direction WD of the sheet joining portion 70 in the stretchable region A2 is preferably 0.08 to 0.17 times the dimension in the width direction WD of the post-processing tape 90. Moreover, it is preferable that the space | interval of the width direction WD of the sheet | seat junction part 70 in expansion-contraction area | region A2 is 0.3 to 0.5 time the dimension 91W of the width direction WD of the root part 91. FIG. Further, in the first region 96 and the second region 97, the dimension 70W in the width direction WD of the sheet joining portion 70 is 1/2 to 1 times the dimension 70W in the width direction WD of the sheet joining portion 70 in the stretchable region A2. It is preferable. Further, the interval 70x in the width direction WD of the sheet joining portion 70 in the first region 96 and the second region 97 is 1/6 to 1/3 times the dimension 70W in the width direction WD of the sheet joining portion 70 in the stretchable region A2. It is preferable that Moreover, it is preferable that the area ratio of the sheet | seat junction part 70 in the 1st area | region 96 and the 2nd area | region 97 is 2-6 times the area ratio of the sheet | seat junction part 70 of expansion-contraction area | region A2.

The following are examples of specific dimensions.
Dimension 70W in the width direction WD of the sheet joining portion 70 in the stretchable region A2: 0.5 to 4 mm (particularly 1.0 to 2.0 mm)
Spacing 70x in the width direction WD of the sheet joining portion 70 in the stretchable region A2: 4 to 8 mm (especially 6 to 8 mm)
Dimension 70W in the width direction WD of the sheet joining portion 70 in the first region 96 and the second region 97: 0.5 to 3.0 mm (particularly 0.5 to 1.0 mm)
Spacing 70x in the width direction WD of the sheet bonding portion 70 in the first region 96 and the second region 97: 1 to 6 mm (particularly 1 to 3 mm)

In recent years, in order to emphasize the softness when the product is picked up and the flexibility of the exterior body 12, the outer nonwoven fabric layer 12S has a fineness of 1.8 to 6.0 dtex and a basis weight of 10 to 30 g / m ^2. Air through nonwoven fabrics having a thickness of about 0.2 to 1.2 mm are often used. When such a low-density and flexible air-through nonwoven fabric is used for the outer nonwoven fabric layer 12S, of course, it has sufficient strength in normal use, but stress is concentrated when the post-treatment tape 90 is pulled excessively strongly. In the portion, the fiber bond of the outer nonwoven fabric layer 12S is broken, and it is easy to peel off from the inner nonwoven fabric layer 12H by so-called substrate destruction. Therefore, the reinforcement by the difference in the area ratio of the sheet joint portion 70 described above is particularly significant when the present air-through nonwoven fabric is used. Specifically, the strength of such an air-through nonwoven fabric is such that the tensile strength (6.3.1 standard time) specified in JIS L 1913: 2010 is 5 to 11 N / 50 mm, particularly 7 to 9 N / 50 mm in the width direction WD. The tear strength (6.4.3 single tongue method) specified in JIS L 1913: 2010 is 1.5 to 1.5 in the front-rear direction LD, and is about 25 to 45 N / 50 mm in the front-rear direction LD. It is about 5.5 N / 30 mm, especially about 2.5 to 4.0 N / 30 mm.

  When the non-stretchable region A1 is formed by cutting the elastic member 19, a cut hole 13 may be formed by cutting or melting the outer nonwoven fabric layer 12S, and the presence of the cut hole 13 reduces the strength of the outer nonwoven fabric layer 12S. To do. In particular, when such a cut hole 13 is located at the root portion 91 of the post-processing tape 90, or after the outer nonwoven fabric layer 12S is peeled from the inner nonwoven fabric layer 12H by excessively pulling the post-processing tape 90, or simultaneously, The outer nonwoven fabric layer 12S is easy to tear (break). Therefore, the reinforcement by the difference in the area ratio of the sheet joint 70 described above is particularly significant when the non-stretchable region A1 is formed by cutting the elastic member 19. Further, when the non-stretchable region A1 is formed by cutting the elastic member 19, if the area ratio of the sheet joint portion 70 is high over a wide area of the non-stretchable region A1, the elastic member 19 is easily fixed by the sheet joint portion 70. Therefore, shrinkage of the elastic member 19 after cutting may be hindered. Therefore, in the case where the non-stretchable region A1 is formed by cutting the elastic member 19, it is preferable that the adhesive reinforcement portion is limited to a region that substantially overlaps the post-processing tape 90 as in the example shown in FIGS. .

  As described above, in order to mainly improve the air permeability, when the above-mentioned perforated nonwoven fabric is used for the outer nonwoven fabric layer 12S, if the hole 14 is present in the region including the root portion 91 of the post-processing tape 90, the post-processing tape When the outer nonwoven fabric layer 12S is peeled off from the inner nonwoven fabric layer 12H by excessively pulling 90, the outer nonwoven fabric layer 12S is easily torn (ruptured). Therefore, the reinforcement by the difference in the area ratio of the sheet joint portion 70 described above is particularly significant when a porous nonwoven fabric is employed for the outer nonwoven fabric layer 12S.

  Here, the array of holes 14 is a matrix-like array in which the rows of holes 14 that are linearly arranged at intervals in the front-rear direction LD are repeated at intervals in the width direction WD, and the width direction of the columns of holes 14 When the interval of WD is narrower than the interval of the front-rear direction LD of the holes 14, the outer nonwoven fabric layer 12S is particularly torn after the outer nonwoven fabric layer 12S is separated from the inner nonwoven fabric layer 12H by excessively pulling the post-treatment tape 90 ( It is easy to tear along the width direction. In addition to or in place of this, the shape of the hole 14 is such that the dimension in the width direction WD is 0.3 to 5.0 mm, and the dimension in the width direction WD is 1.2 to 2.2. The outer nonwoven fabric layer 12S is particularly easy to tear even when it has a horizontally long shape of about 5 times. Therefore, the reinforcement by the difference in the area ratio of the sheet joint portion 70 described above is particularly significant in these cases. In other words, if the interval in the width direction WD of the row of holes 14 is wider than the interval in the front-rear direction LD of the holes 14 or the dimension in the width direction WD of the holes 14 is short, the exterior nonwoven fabric is difficult to tear.

  On the other hand, when the present stretchable structure is manufactured using a ready-made perforated nonwoven fabric, the outer nonwoven fabric is formed in a portion to be a sheet joint portion by overlapping a part of the coating line of the hot melt adhesive 14H and the row of the holes 14. There is a possibility that a missing portion where the layer 12S and the inner nonwoven fabric layer 12H are not joined is formed. Here, when the interval 14y in the orthogonal direction XD of the holes 14 in the row of the holes 14 is smaller than the dimension 14L in the orthogonal direction XD of the holes 14, the sheet joining portion 70 becomes a dotted line shape that is intermittent through a long missing portion, A large number of long concave missing portions are formed at the edge of the sheet joining portion 70. Thus, when the omission of the sheet joining portion 70 becomes large, in the stretchable region A2, a large unevenness is also formed on the side edge of the ridge 80, or it is easy to partially merge with the adjacent ridge 80. Difficult to get a good appearance. Further, in the non-stretchable region A1, the outer nonwoven fabric layer 12S is more easily peeled when the missing portion of the sheet joining portion 70 is provided in the region 95 overlapping the root portion 91 of the post-processing tape 90.

  On the other hand, if the interval 14y in the orthogonal direction XD of the holes 14 in the row of holes 14 is larger than the dimension 14L in the orthogonal direction XD of the holes 14 as shown in the example of the drawing, a part of the sheet joining portion 70 has a missing portion. Even if it is formed, since the ratio of the missing portion in the orthogonal direction XD of the sheet joining portion 70 is less than half, the influence of the missing portion is smaller. Therefore, as shown in FIG. 17, even if irregularities are formed on the side edge of the ridge 80 or partially merged with the adjacent ridge 80, the extent can be suppressed. Further, the adhesion of the outer nonwoven fabric layer 12S in the non-stretchable region A1 is also difficult to weaken.

  The interval 14y in the orthogonal direction XD of the holes 14 in the row of the holes 14 can be determined as long as it is wider than the dimension 14L of the holes 14 in the orthogonal direction XD, but is at least three times the dimension 14L of the holes 14 in the orthogonal direction XD. And even if unevenness is formed on the side edge of the flange 80 in the stretchable region A2 due to the missing portion (the portion overlapping the hole 14) of the sheet joining portion 70, or partially merged with the adjacent flange 80, It becomes almost inconspicuous. Further, when the interval 14y in the orthogonal direction XD of the holes 14 in the row of holes 14 exceeds 20 times the dimension 14L of the orthogonal direction XD of the holes 14, the number of the holes 14 per unit area decreases, and a perforated nonwoven fabric is used. The profit to do is poor. A more preferable range is 3 to 10 times.

  It is also preferable that the interval 14y in the orthogonal direction XD of the holes 14 in the row of the holes 14 is not less than the interval 19y in the orthogonal direction XD of the elastic member 19. Thereby, in the stretchable region A2, since there are only one or less holes 14 in each row in the entire region between the adjacent elastic members 19, there is little change in the ease of bending due to the presence or absence of the holes 14, It becomes easier to form a more uniform ridge 80.

  Further, in the illustrated example, all the expansion / contraction areas A2 satisfy the size relationship of the interval 14y and the dimension 14L, but it is not necessary for all of the expansion / contraction areas A2 to satisfy the size relationship of the interval 14y and the dimension 14L. For example, although not shown, the waist portion W does not satisfy the size relationship of the interval 14y and the size 14L, but may satisfy the size relationship of the interval 14y and the size 14L except for the waist portion W. The relationship between the intervals 14y and 19y is the same, and may be filled with all of the stretchable region A2, or may not be filled with a part of the stretchable region A2.

  The interval 14x in the expansion / contraction direction ED of the row of holes 14 can be determined as appropriate. However, if the interval 14x is less than the interval 70x in the expansion / contraction direction ED of the sheet joining portion 70, one or more holes are provided in each flange 80 as illustrated. 14 exists, and the air permeability between the space between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H and the outside of each ridge 80 is preferable. In addition, if the interval in the expansion / contraction direction ED of the row of holes 14 is reduced in this way, the probability that the application line of the hot melt adhesive 14H overlaps with the row of holes 14 increases, but even in that case, as described above In addition, since the interval 14y in the orthogonal direction XD of the holes 14 in the row of the holes 14 is wider than the dimension 14L in the orthogonal direction XD of the holes 14, the shape of the flange 80 can be prevented from being deformed.

  As described above, the cross-sectional structure of the hole 14 is not particularly limited, but when the protruding portion 14e is formed at the edge of the hole 14 on the opposite nonwoven fabric layer side, the hot melt adhesive 14H is applied. When the line and the hole 14 overlap each other, the portion including the protruding portion 14e at the edge of the hole 14 is adhered by the hot melt adhesive 14H, so that the bite of the hot melt adhesive 14H becomes good, and the protruding portion 14e. Adhesive strength is higher than in the case of not having. Further, since the perforated nonwoven fabric is separated from the opposing nonwoven fabric by the amount of the protrusion 14e, the hot melt adhesive 14H exposed from the hole 14 when the surface opposite to the opposing nonwoven fabric is touched by hand is in hand. It also has the advantage of being difficult to touch.

  In particular, when both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and there is a possibility that the holes 14 and 14 overlap, the hot melt adhesive 14H is applied to the portion where the holes 14 and 14 overlap. When the coating lines overlap, the hot melt adhesive 14H protrudes into the holes 14 and may cause problems such as wearing feeling. Therefore, as shown in FIGS. 11 and 12, the inner nonwoven fabric layer 12H on the skin side of the wearer is a nonporous nonwoven fabric, and the outer nonwoven fabric layer 12S is a porous nonwoven fabric, as shown in FIGS. Thus, it is desirable that both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the holes 14 of one perforated nonwoven fabric and the holes 14 of the other perforated nonwoven fabric do not overlap.

  As described above, the arrangement of the holes 14 is not limited. However, since the perforated nonwoven fabric is easily bent at the portion having the holes 14, the shape of the ridge 80 is affected. Therefore, when the holes 14 are arranged in a matrix in which rows of holes 14 linearly arranged at a predetermined interval in the orthogonal direction XD are repeated at a predetermined interval in the expansion / contraction direction ED, in particular, the ridge 80 is arranged in the orthogonal direction XD. It is preferable because it extends straight along and tends to be neatly arranged.

Moreover, although the dimension and arrangement | positioning of the concrete hole 14 and the sheet | seat junction part 70 can be determined suitably, it is especially preferable in it being in the following ranges. That is, when the sheet bonding portion 70 has a missing portion, the bonded portion is more easily peeled off than the area of the sheet bonding portion 70 is simply reduced due to the tendency of stress concentration. And when peeling of such an adhesive part generate | occur | produces, there exists a possibility that the deterioration of the external appearance of the collar 80 may become still more remarkable by collapse of a part or whole of the collar 80. On the other hand, when the dimension and arrangement of the hole 14 and the sheet bonding portion 70 (excluding the above-described high area ratio portion of the sheet bonding portion 70) are within this range, the sheet bonding portion 70 has a missing portion. However, it becomes difficult to peel off.
Dimension 14W of expansion / contraction direction ED of hole 14: 0.3-5.0 mm (especially 1.0-2.0 mm)
Dimension 14L in the orthogonal direction XD of the hole 14: 0.3 to 3.0 mm (particularly 1.0 to 1.5 mm)
Interval 14y in the orthogonal direction XD of the holes 14 in the row: 2.5 to 10.0 mm (especially 3.0 to 5.0 mm)
Interval 14x between rows in the expansion / contraction direction ED: 1.0 to 5.0 mm (particularly 1.0 to 2.0 mm)
Dimensions of sheet joint in the stretching direction: 0.5-4 mm (especially 1.0-2.0 mm)
Spacing between sheet joints in the stretching direction: 4 to 8 mm (especially 6 to 8 mm)

  Although the hole 14 and the sheet | seat junction part 70 can also be provided only in the expansion-contraction area | region A2, as shown in the example shown in FIG.8 and FIG.9, it can be provided over a wider range area | region including the non-expandable area | region A1.

  The sheet joining portion 70 of the above example is a portion where the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are joined via the hot melt adhesive 14H, but is a portion where the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are welded. There may be. That is, at the time of forming the sheet joining portion 70, the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H may be welded in a striped pattern that is spaced in the expansion / contraction direction ED and continuous in the orthogonal direction XD. In this case, the elastic member 19, the outer nonwoven fabric layer 12S, and the inner nonwoven fabric layer 12H may be welded or not welded at the passing position of the elastic member 19. In any case, in order to weld the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H with the elastic member 19 interposed, the melted portions of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer. At least one of 12H is continuous in the orthogonal direction XD.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

  "The front-rear direction" means the direction (vertical direction) indicated by the symbol LD in the figure, and "width direction" means the direction indicated by WD (left-right direction) in the figure, Are orthogonal.

  -"MD direction" and "CD direction" mean the flow direction (MD direction) in production equipment and the transverse direction (CD direction) perpendicular thereto, and either one is the front-rear direction, and the other Is the width direction. The MD direction of the nonwoven fabric is the direction of fiber orientation of the nonwoven fabric. The fiber orientation is the direction along which the fibers of the nonwoven fabric are aligned. For example, the fiber orientation can be determined from the measurement method according to the TAPPI standard method T481, the fiber orientation test method using the zero-range tensile strength, and the tensile strength ratio in the front-rear direction and the width direction. It can be discriminated by a simple measuring method for determining the orientation direction.

  ・ "Front side" means the person near the wearer's skin when wearing a pants-type disposable diaper, and "Back" means the person far from the wearer's skin when wearing a pants-type disposable diaper .

  ・ "Surface" means the surface closer to the wearer's skin when wearing a pants-type disposable diaper, and "Back" refers to the skin of the wearer when wearing a pants-type disposable diaper. It means the far side.

  “Center” with respect to a closed planar shape means the center of gravity in the case of a figure having no center.

-“Area ratio” means the ratio of the target portion to the unit area, and is expressed as a percentage by dividing the total area of the target portion (for example, holes) in the target region (for example, non-woven fabric) by the area of the target region. is there. In a form in which a large number of target portions are provided at intervals, it is desirable to set the target region to a size that includes 10 or more target portions and obtain the area ratio. For example, the area ratio of the pores can be measured by the following procedure using, for example, a trade name VHX-1000 of KEYENCE Corporation and measuring conditions 20 times.
(1) Set on a 20x lens and adjust the focus. The position of the nonwoven fabric is adjusted so that the holes are 4 × 6.
(2) Specify the brightness of the hole area and measure the area of the hole.
(3) Click the “Area measurement” color extraction in “Measurement / Comments”. Click on the hole.
(4) Click “Batch measurement”, check “Display measurement result window”, and save as CSV data.

  “Elongation rate” means a value when the natural length is 100%. For example, an expansion rate of 200% is synonymous with an expansion ratio of 2 times.

  -"Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt% 1.0 g of a superabsorbent polymer is added to 49.0 g of the mixture) and stirred with a stirrer. The produced gel is left in a constant temperature and humidity chamber of 40 ° C. × 60% RH for 3 hours and then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering).

  ・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. From the test piece in a constant weight state, a sample plate (100 mm × 100 mm) is used to cut a sample having a size of 100 mm × 100 mm. The weight of the sample is measured, multiplied by 100, and the weight per square meter is calculated and used as the basis weight.

-"Thickness" is automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 0.098 N / cm ² and pressure area: 2 cm ² .

  “Bending softness” means “8.21.1 A method (45 ° cantilever method)” of JIS L 1096: 2010 “Fabric and knitted fabric testing method”. When the non-porous nonwoven fabric before punching is not available, the value of the porous nonwoven fabric before punching (non-porous nonwoven fabric) is the same as the non-porous nonwoven fabric (fiber composition, fineness, basis weight, thickness, etc.). Prepare and measure.

  -The amount of water absorption is measured according to JIS K7223-1996 "Test method for water absorption of superabsorbent resin".

  ・ The water absorption rate is the “time to end point” when JIS K7224-1996 “Test method for water absorption rate of superabsorbent resin” is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. .

  -"Developed state" means a state where the plate is flattened without contraction or slack.

  -Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.

  ・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in the standard state (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). To do.

  As long as the present invention is a pants-type disposable wearing article, the pants-type disposable diaper and the diaper cover as in the above example can be used without particular limitation.

  A1 ... non-stretchable region, A2 ... stretchable region, B ... back body, C ... buttocks cover region, E ... separation region, ED ... stretchable direction, F ... front body, H ... hole, L ... intermediate region, LD ... front-back direction , LO ... leg opening, T ... waist circumference region, U ... waist lower part, W ... waist part, WD ... width direction, WO ... waist opening, XD ... orthogonal direction, 11 ... liquid impervious sheet, 12 ... exterior body , 12A ... side seal part, 12B ... rear exterior body, 12F ... front exterior body, 12H ... inner nonwoven fabric layer, 12S ... outer nonwoven fabric layer, 12r ... skin nonwoven fabric layer, 13 ... cut hole, 14 ... hole, 14e ... Projection, 14H ... hot melt adhesive, 18 ... unnecessary elastic member, 19 ... elastic member, 20 ... non-woven fabric cover, 30 ... top sheet, 40 ... intermediate sheet, 50 ... absorbent element, 56 ... absorbent, 58 ... packaging sheet , 60 ... get up, gather, 2 ... Gathered non-woven fabric, 70 ... Sheet joint part, 80 ... Saddle, 90 ... Post-processing tape, 91 ... Root part, 92,93 ... Main body part, 94 ... Adhesive layer, 92 ... First part, 93 ... Second part 96 ... 1st area | region, 97 ... 2nd area | region, 200 ... Interior body, 201 ... Inner / outer joint part.

Claims (7)

An integral exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body;
An interior body that is attached to the widthwise middle part of the exterior body and covers both front and rear sides of the crotch part,
Side seal parts in which both sides of the outer body in the front body and both sides of the outer body in the back body are joined,
With a waist opening and a pair of left and right leg openings,
The exterior body has a waist area that is a front-rear direction range corresponding to the side seal portion,
The waist region includes an outer non-woven fabric layer and an inner non-woven fabric layer, and a plurality of the non-woven fabric layers extending along the stretch direction, arranged between the outer non-woven fabric layer and the inner non-woven fabric layer with an interval in an orthogonal direction perpendicular to the stretch direction. A slender elastic member of
The outer nonwoven fabric layer and the inner nonwoven fabric layer are repeatedly provided at intervals in the width direction, and have a sheet joining portion joined by a hot melt adhesive or a welding portion continuous in the front-rear direction,
The waist region has a non-stretchable region provided in the middle of the width direction in the front-rear direction range having the interior body, and a stretchable region provided on both sides of the non-stretchable region in the width direction,
The stretchable region has the elastic member and is a region that elastically stretches in the width direction together with the elastic member.
A post-processing tape is provided on the outer surface of the non-stretchable region,
The post-treatment tape includes a belt-like root portion extending in the front-rear direction, fixed to the outer surface of the outer nonwoven fabric layer, a belt-like main body portion extending from the waist opening side of the root portion, and an adhesive provided on the main body portion. Having an agent layer,
In pants-type disposable wearing articles,
The sheet joining portion is provided in each of the stretchable region and the non-stretchable region,
The area ratio of the sheet joint portion in the region including at least the base end of the main body portion in the portion overlapping the root portion of the post-treatment tape is higher than the area ratio of the sheet joint portion of the stretchable region,
A pants-type disposable wearing article characterized by that. The main body portion of the post-processing tape has a first portion extending from the waist opening side of the base portion to the crotch side, and a second portion folded back to the waist opening side at the tip of the first portion. , An adhesive layer is provided on a surface of the first portion facing the root portion and a surface of the second portion facing the first portion, and the first portion is formed by the pressure-sensitive adhesive layer. The first part and the second part are fixed in a folded state on the root part, and the second part is adhered to the first part by the adhesive layer, respectively.
The outer nonwoven fabric layer includes a first region including a position of a base end of the first portion, a boundary position between the first portion and the second portion, and a second region spaced from the first region toward the crotch side. And having an area
The dimension in the width direction of the first region and the second region is 1.0 to 1.5 times the dimension in the width direction of the root portion,
The dimension in the front-rear direction of the first region is 0.1 to 0.5 times the dimension in the front-rear direction of the root portion,
The dimension in the front-rear direction of the second region is shorter than the dimension in the front-rear direction of the first region.
The area ratio of the sheet joint portion in the first region and the second region is higher than the area ratio of the sheet joint portion in the stretchable region,
The pants-type disposable wearing article according to claim 1. The width direction dimension of the sheet joint portion in the stretchable region is 0.08 to 0.17 times the width direction dimension of the root portion,
The interval in the width direction of the sheet joint portion in the stretchable region is 0.3 to 0.5 times the dimension in the width direction of the root portion,
In the first region and the second region, the dimension in the width direction of the sheet joint portion is 1/2 to 1 times the dimension in the width direction of the sheet joint portion in the stretchable region,
The interval in the width direction of the sheet joint portion in the first region and the second region is 1/6 to ３ times the dimension in the width direction of the sheet joint portion in the stretchable region,
The area ratio of the sheet joint portion in the first region and the second region is 2 to 6 times the area ratio of the sheet joint portion in the stretchable region.
The pants-type disposable wearing article according to claim 2. The outer nonwoven layer, fineness 1.8～6.0Dtex, basis weight 10 to 30 g / m ^2, an air-through nonwoven fabric having a thickness of 0.2 to 1.2 mm,
The pants type disposable wearing article according to any one of claims 1 to 3. The non-stretchable region is an unnecessary elastic member composed of at least one of a cutting remaining portion continuous from the elastic member in the stretchable region, and a cut piece of an elastic member not continuous with the elastic member in both the stretchable regions, and cutting of the elastic member A number of cut holes in the nonwoven fabric layer formed at intervals,
A root portion of the post-processing tape is fixed to the non-stretchable region,
The pants type disposable wearing article according to any one of claims 1 to 4. The outer nonwoven fabric layer is a perforated nonwoven fabric in which holes penetrating in the thickness direction are arranged at least over the entire waist region.
The pants-type disposable wearing article according to any one of claims 1 to 5. The holes are arranged in a matrix in which rows of holes lined up linearly at intervals in the front-rear direction are repeated at intervals in the width direction,
The interval in the width direction of the row of holes is narrower than the interval in the front-rear direction of the holes,
The pants-type disposable wearing article according to claim 6.

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