JP6495507B1 - Stretchable structure of disposable wearing article, and pants-type disposable wearing article having the stretchable structure - Google Patents

Abstract

[PROBLEMS] To provide a stretchable structure which is excellent in breathability and flexibility and in which a more well-designed crease is formed. The problem is that at least one of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H is a perforated non-woven fabric in which the holes 14 penetrating in the thickness direction are arranged, and bonding the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H The sheet bonding portions 70 are formed in a stripe pattern spaced apart in the orthogonal direction XD and substantially continuous in the stretching direction ED, and the arrangement of the holes 14 is spaced in the direction orthogonal to the stretching direction ED. The row of holes 14 arranged in a row is repeated at intervals in the expansion / contraction direction ED, and the spacing 14y in the orthogonal direction XD of the holes 14 in the row of holes 14 is the spacing 70y in the orthogonal direction XD of the sheet bonding portion 70. It is solved by a telescopic structure of the disposable wearing article characterized by being narrower. [Selected figure] Figure 11

Description

  The present invention relates to a stretchable structure of a disposable wearing article, and a pants-type disposable wearing article having the stretchable structure.

  In disposable wearing articles, it is common to provide a stretchable structure to improve the fit of each part. For example, in the disposable diapers of the pants type and the tape type, it is widely practiced to provide an elastic structure in the waist direction in the waist area, or to provide an elastic structure in the direction along the legs around the leg environment. . Furthermore, it is also widely practiced to provide an expansion and contraction structure in the front and back direction called solid gathers and flat gathers over disposable wear articles including sanitary napkins, as well as disposable diapers of the pants type and tape type, as well as solid gathers and flat gathers. See documents 1 to 3).

  A representative example of the stretchable structure of such a disposable wearing article is an elongated elastic member provided along the stretch direction and spaced from each other between the overlapping first non-woven fabric layer and the second non-woven fabric layer. To prepare. The first non-woven fabric layer and the second non-woven fabric layer form a planar elastic region, and also serve to cover and conceal the elastic member, and the elastic member contained between the first non-woven fabric layer and the second non-woven fabric layer Play a role in creating power for The elastic member is fixed to the first non-woven fabric layer and the second non-woven fabric layer at least at portions located at both ends of the stretchable region in a state of being stretched in the stretch direction. By this fixing, the elastic member is integrated with the first non-woven fabric layer and the second non-woven fabric layer, and the first non-woven fabric layer and the second non-woven fabric layer are shrunk due to the contraction force of the elastic member to include wrinkles. Not only in the natural length state, but also in the stretched state of the elastic member) is formed, and when it is stretched against the contraction force of the elastic member from this contracted state, the crease is developed. Usually, the first nonwoven layer and the second nonwoven layer are in a developed state free from wrinkles at the elastic extension limit, wrinkled with shrinkage of the elastic member, and wrinkled most closely in the natural length state.

  In such an elastic structure, when the first non-woven fabric layer and the second non-woven fabric layer are free from each other, one non-woven fabric layer partially or totally floats with respect to the other non-woven fabric layer to cause unnecessary wrinkles or swelling. The first non-woven fabric layer and the second non-woven fabric layer need to be joined directly or indirectly almost all over, since there is a possibility that this will occur. Further, in order to create stretchability by the elastic member, the elastic member is extended over the entire stretch direction of the stretch region, and at least portions located at both ends of the stretch region in the stretch direction are the first non-woven fabric layer and the second non-woven fabric layer In the natural length state, the first nonwoven layer and the second nonwoven layer need to be shrunk as the elastic member contracts. That is, bonding between the first nonwoven fabric layer and the second nonwoven fabric layer and fixing of the elastic member to the first nonwoven fabric layer and the second nonwoven fabric layer are required.

  At present, hot melt adhesives are most often selected as means for securing the elastic member to the first nonwoven layer and the second nonwoven layer. On the other hand, bonding between the first non-woven fabric layer and the second non-woven fabric layer is often performed by welding such as ultrasonic welding in order to reduce the amount of use of the hot-melt adhesive. The form performed by is also strongly used. For example, by joining the first non-woven fabric layer and the second non-woven fabric layer by joining the first non-woven fabric layer and the second non-woven fabric layer via the hot melt adhesive at the passage position of the elastic member, joining the first non-woven fabric layer and the second non-woven fabric layer The first non-woven fabric layer and the second non-woven fabric layer are interposed intermittently in the expansion and contraction direction and through the hot-melt adhesive continuously arranged in the direction orthogonal to the expansion and contraction direction, in addition to the combined use of fixing the elastic member to the non-woven fabric layer. It is known that the first non-woven fabric layer and the second non-woven fabric layer are joined via a hot-melt adhesive substantially continuous in the expansion / contraction direction and intermittently disposed in a direction orthogonal to the expansion / contraction direction. It is done. (Refer to patent documents 1-6)

  On the other hand, in order to mainly improve the air permeability, it has been proposed to provide a hole penetrating in the thickness direction in the first nonwoven layer and the second nonwoven layer (see, for example, Patent Documents 7 to 9).

  Among them, those described in Patent Documents 7 and 8 are the bonding of the first non-woven fabric layer and the second non-woven fabric layer, and the first non-woven fabric layer, with an adhesive applied spirally or in a stripe over the entire surface of one non-woven fabric layer. And fixing the elastic member to the second non-woven fabric layer. Moreover, formation of the hole in a 1st nonwoven fabric layer and a 2nd nonwoven fabric layer is performed by melt | dissolution, cutting out, and stamping before or after joining of a 1st nonwoven fabric layer and a 2nd nonwoven fabric layer.

  On the other hand, in the case described in Patent Document 9, the joint portion of the first non-woven fabric layer and the second non-woven fabric layer is formed by welding at intervals in the expansion and contraction direction and the direction orthogonal thereto. It forms.

  However, in the cases described in Patent Documents 7 and 8, when the application pattern of the adhesive is spiral, the bonding of the first non-woven fabric layer and the second non-woven fabric layer becomes the entire surface, so the air permeability in parts other than the holes decreases. In addition, the flexibility may decrease (the rigidity may increase).

  On the other hand, in the case of Patent Document 9, since the bonding of the first non-woven fabric layer and the second non-woven fabric layer is the edge of the hole and the elastic member does not cross the bonding portion, air permeability and softness in portions other than the hole It is believed that the bond is superior and the array of joints forms a weir that extends cleanly across the elastic member. However, in the case of Patent Document 9, such a clean crease can not be formed unless the bonding and the drilling are simultaneously performed. For example, when manufacturing the thing of patent document 9 using the nonwoven fabric in which the hole penetrating in the thickness direction was previously formed, since the position of a hole and a junction part has to shift, the valley located between ridges In addition to the part of the row of joints, the non-woven fabric layer is formed not only in the part of the row of easily bendable holes, so that the ridges may branch or the valleys of the ridges may become partially wide. The regular shape may deteriorate the appearance.

JP 2004-229857 A JP, 2013-132331, A JP, 2014-207973, A JP, 2017-064126, A JP, 2017-064133, A JP, 2017-164034, A JP, 2015-107223, A JP, 2015-128573, A Unexamined-Japanese-Patent No. 2015-192862

  Then, the main subject of this invention is providing the expansion-contraction structure of the disposable wearing article which is excellent in air permeability and pliability, and in which a more detailed wrinkles are formed.

The expansion-contraction structure etc. of the disposable wearing article which solved the said subject are as follows.
<First aspect>
The first nonwoven layer and the second nonwoven layer partially or entirely overlapping each other, and the first nonwoven layer and the second nonwoven layer are spaced apart in the orthogonal direction orthogonal to the expansion direction, along the expansion direction And a plurality of elongated elastic members extending
At least both ends of the elastic member in the elastic direction in the elastic region are fixed to the first nonwoven layer and the second nonwoven layer.
The stretchable region includes a sheet bonding portion in which the first non-woven fabric layer and the second non-woven fabric layer are bonded,
At least one of the first non-woven fabric layer and the second non-woven fabric layer is a perforated non-woven fabric in which holes penetrating in the thickness direction are arranged.
In the telescopic structure of the disposable wearing article,
The sheet bonding portion is formed in a stripe pattern spaced apart in the orthogonal direction and substantially continuous in the expansion and contraction direction,
In the arrangement of the holes, rows of the holes arranged at intervals in the orthogonal direction are arranged at intervals in the expansion and contraction direction,
The orthogonal spacing of the holes in the row of holes is less than the spacing in the orthogonal direction of the sheet joints,
A telescopic structure of a disposable wearing article characterized in that.

(Action effect)
In this stretchable structure, the sheet bonding portion is formed in a stripe pattern which is substantially continuous in the stretch direction at intervals in the orthogonal direction orthogonal to the stretch direction, so that good air permeability and flexibility can be obtained. It can be secured.

  In addition, when the sheet bonding portion is formed in a stripe pattern which is spaced in the orthogonal direction and is substantially continuous in the expansion and contraction direction, the first non-woven fabric layer and the second non-woven fabric layer are integrated at each sheet bonding portion. As a result, the ridges are formed in a wavelike manner along each other. And under the influence, the first non-woven fabric layer and the second non-woven fabric substantially follow the shape of the first non-woven fabric layer and the second non-woven fabric layer in the sheet bonding portion also in the region between the adjacent sheet bonding portions. Wrinkles are formed on both the front and back sides of the layers in a wavelike manner along each other.

  However, when the sheet bonding portions are intermittently arranged in the orthogonal direction, the first non-woven fabric layer and the second non-woven fabric layer can be freely deformed in the region between the adjacent sheet bonding portions. Further, in the case of the perforated nonwoven fabric in which the holes penetrating in the thickness direction are arranged, the part having the holes is weak and easily bent in a state where it can be deformed alone. For this reason, at least one of the first non-woven fabric layer and the second non-woven fabric layer is a non-porous non-woven fabric, and when there is a hole in one region across the sheet bonding portion, there is no hole in the other region, While the creases in which the holes are broken are formed in the region of (i), the wrinkles of not aligned (not continuous in the orthogonal direction) are formed in the other region. That is, the ridges branch and the valleys become partially wide, and it is difficult to form a ridge that is well-formed as a whole.

  On the other hand, the arrangement of the holes in the present embodiment is such that the rows of holes spaced apart in the orthogonal direction are spaced apart in the expansion and contraction direction, and the distance in the orthogonal direction of the holes in the row of holes However, if the space between the sheet joints is smaller than the distance between the sheet joints in the orthogonal direction, the holes exist in all the regions between the adjacent sheet joints, and the holes form a row in the direction orthogonal to the expansion and contraction direction. Over the entire area delimited by the joint, a series of creases that make the hole fold is likely to be formed. That is, it becomes difficult for the ridges to branch and the valleys to be partially wide, and as a whole, it becomes easy to form a clean ridge extending along the row of holes.

  In addition, that the sheet | seat junction part "it is substantially continuous in the expansion-contraction direction" is the direction (per 1mm non-woven fabric and the 1st nonwoven fabric layer and the expansion | deployment state) at least. It means that it is continuous (continuously continuous) when viewed from the direction parallel to the second nonwoven fabric layer and orthogonal to the elastic stretch member, and in that range, the sheet bonding portion is continuous in the stretch direction (first nonwoven fabric layer) And the second non-woven fabric layer is continuously joined in the expansion and contraction direction), but the sheet bonding portion is intermittently disposed in the expansion and contraction direction (the first non-woven fabric layer and the second non-woven fabric layer are intermittent in the expansion and contraction direction It is the meaning also including the form which is joined.

<Second aspect>
The orthogonal spacing of the holes in the row of holes is at least 1/6 and less than 1⁄2 of the spacing in the orthogonal direction of the sheet bonding portion.
The expansion-contraction structure of the disposable wearing article of a 1st aspect.

(Action effect)
In the case of this embodiment, since there are two or more holes in all the regions between the adjacent sheet joints, a series of creases that make the holes become easier to be formed. Therefore, it becomes easy to form an even more elaborate wrinkle.

<Third aspect>
The sheet bonding portion is formed of a hot melt adhesive disposed at a portion overlapping with the elastic member.
The expansion-contraction structure of the disposable wearing article of a 1st or 2 aspect.

(Action effect)
Such a sheet bonding portion can be manufactured by sandwiching an elastic member coated with a hot melt adhesive with the first nonwoven layer and the second nonwoven layer, and is widely used in the field of disposable wearing articles There is. However, in the structure of the sheet bonding portion, the first non-woven fabric layer and the second non-woven fabric layer contract with the elastic member at the sheet bonding portion, and the fiber structure becomes dense. Therefore, in principle, the crease is likely to be divided at the sheet bonding portion. On the other hand, if the arrangement of the holes and the arrangement relationship between the holes and the sheet bonding portion described above are adopted, the influence of the holes becomes dominant with respect to the formation of the wrinkles. Regardless, as a whole, it is likely that a well-defined weir extending along the row of holes will be formed.

<Fourth aspect>
The diameter of the holes in the perforated non-woven fabric decreases from the opposite side to the opposite non-woven fabric layer side toward the opposite non-woven fabric layer side,
The telescopic structure of the disposable wearing article according to any one of the first to third aspects.

(Action effect)
As in the present embodiment, when the diameter of the hole decreases from the opposite side to the opposite side of the non-woven fabric layer toward the opposite non-woven fabric layer side, the surface opposite to the opposite non-woven layer becomes valley fold. It is easy to break. Therefore, the brow is more beautifully arranged. Moreover, in the crucible formed of the stretchable structure of the present embodiment, the row of holes comes to be located at the bottom between the crucible and the cage, and the hole is hidden between the cage and the cage when natural length is used The hole is exposed in the state of being elongated. It is a matter of course that the change in appearance is intended to improve the breathability by this change, and it is also advantageous in that it is easy to appeal to the user that the product is a good breathable product.
The diameter of the hole means the dimension in a direction passing through the center of gravity of the hole and orthogonal to the expansion and contraction direction (therefore, it becomes a diameter in the case of a circle and a major diameter in the case of an ellipse).

<Fifth aspect>
The hole has a dimension of 0.3 to 3.0 mm in the expansion / contraction direction and a dimension of 0.3 to 5.0 mm in the orthogonal direction,
The spacing of the holes in the row in the orthogonal direction is 1.0 to 5.0 mm,
The interval in the expansion and contraction direction of the row is 2.5 to 10.0 mm,
The space | interval of the said sheet | seat junction part in the said orthogonal direction is 5-10 mm,
The size of the said sheet | seat junction part in the said orthogonal direction is 0.5-5.0 mm. The expansion-contraction structure of the disposable wearing article of any one of the 1-4 aspects.

(Action effect)
Although arrangement | positioning of a hole and a sheet | seat junction part can be suitably determined, it is preferable to exist in the range of this aspect.

<Sixth aspect>
The arrangement of the holes in the perforated non-woven fabric is a matrix in which a row of holes linearly arranged at predetermined intervals in the orthogonal direction is repeated at predetermined intervals in the expansion and contraction direction.
The telescopic structure of the disposable wearing article according to any one of the first to fifth aspects.

(Action effect)
In the case of a matrix-like array as in this embodiment, the perforated non-woven fabric is particularly likely to have wrinkles neatly arranged.

<Seventh aspect>
Of the first nonwoven layer and the second nonwoven layer, the nonwoven layer on the skin side of the wearer is a non-porous nonwoven, and the opposite nonwoven layer is the perforated nonwoven.
The telescopic structure of the disposable wearing article according to any one of the first to sixth aspects.

(Action effect)
By making the non-woven fabric layer on the skin side non-porous non-woven fabric, the influence of the pores on the touch can be eliminated. In addition, since only one of the first non-woven fabric layer and the second non-woven fabric layer has a hole, the skin is not exposed at the time of wearing, and leakage through the hole can be prevented. In particular, when the perforated nonwoven fabric is the fourth aspect, wrinkles formed in the non-woven fabric layer on the skin side become thin wrinkles, and wrinkles formed in the non-woven fabric layer on the opposite side become thick wrinkles that bend gently. Therefore, the contact area between the non-woven fabric layer on the skin side and the skin is small, and the space between the eyebrows and the eyebrows is large, so that the air permeability is particularly excellent. The wrinkles on the opposite side are less likely to cause deformation that impairs the appearance such as falling down, and are excellent in shape stability.

Eighth Aspect
Both the first non-woven fabric layer and the second non-woven fabric layer are the non-porous non-woven fabric, and the holes of one non-porous non-woven fabric do not overlap the holes of the other non-porous non-woven fabric.
The telescopic structure of the disposable wearing article according to any one of the first to seventh aspects.

(Action effect)
In the present embodiment, higher air permeability can be obtained by making both non-woven fabric layers into a non-porous non-woven fabric. Further, since the holes of the one non-woven nonwoven fabric do not overlap with the holes of the other non-porous non-woven fabric, the skin is not exposed at the time of wearing, and leakage through the holes can be prevented.

<Ninth aspect>
An integral exterior body extending from the front to the back, or an exterior provided separately for the front and the back, and an interior extending to the front and back of the crotch attached to the widthwise middle of the exterior. A side seal portion in which both sides of the exterior body in the front body and both sides of the exterior body in the back body are respectively joined, a waist opening, and a pair of left and right leg openings,
The stretchable structure according to any one of the first to eighth aspects, in at least one of the front body and the back body, covering the width direction range corresponding between the side seal portions in at least a partial range in the front-rear direction In such a way that the expansion and contraction direction of the expansion and contraction area is the width direction,
Pants-type disposable wearing article characterized in that.

(Action effect)
The above-mentioned elastic structure is suitable for the exterior body of the pants-type disposable wearing article.

  According to the present invention, it is possible to ensure good breathability and flexibility, and to provide advantages such as formation of a more well-designed crease.

It is a top view which shows the inner surface of the pants-type disposable diaper of an unfolded state. It is a top view which shows the outer surface of the pants-type disposable diaper of an unfolded state. It is 2-2 sectional drawing of FIG. It is the 3-3 sectional drawing of FIG. (A) It is 4-4 sectional drawing of FIG. 1, and (b) 5-5 sectional drawing of FIG. It is a perspective view (hole omission) of a pants type disposable diaper. It is a top view which shows the outer surface of the unfolded interior body with the outline of an exterior body. It is a top view which shows the outer surface of the pants-type disposable diaper of an unfolded state. (A) It is 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 of a hole. It is a top view which expands and shows the principal part of the exterior body of an unfolded state. (A) 6-6 sectional drawing of FIG. 11 which shows a principal part, (b) 7-7 sectional drawing of FIG. 11, and (c) It is sectional drawing of a contracted state. It is a top view which expands and shows the principal part of the exterior body of an unfolded state. 14A is a sectional view taken along the line 6-6 in FIG. 13, FIG. 15B is a sectional view taken along the line 7-7 in FIG. 13, and FIG. It is an orthogonal direction sectional view of the (a) expanded state which shows the principal part, the expansion-contraction direction sectional view of the expanded state, and the width direction sectional view of the (c) contracted state. It is an expanded sectional view of a perforated nonwoven fabric. It is a top view which expands and shows the principal part of the exterior body of an unfolded state. (A) A front view showing the outer surface of the outer body in the natural length state, (b) A front view showing the inner surface of the outer body in the natural length state, (c) A front view showing the outer surface of the outer body in a stretched state It is.

  Hereinafter, an example of a pants-type disposable diaper will be described in detail with reference to the attached drawings. The dotted portions in the cross-sectional view show an adhesive as bonding means for bonding the components located on the front side and the back side. The hot melt adhesive can be formed by a known method such as slot coating, continuous linear or dotted bead coating, spiral or Z-like spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). It can be applied. Alternatively or additionally, the hot melt adhesive can be applied to the outer peripheral surface of the elastic member at the fixing portion of the elastic member to fix the elastic member to the adjacent member. As the hot melt adhesive, for example, those of EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type, etc. exist, but they can be used without particular limitation. As a joining means for joining the respective 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 constituting a front body F and a rear exterior body 12B constituting a rear body B, and a rear exterior through a crotch from the front exterior body 12F. It has an interior body 200 provided inside the exterior bodies 12F, 12B so as to extend to the body 12B. A side seal portion 12A is formed by joining both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B. As a result, the opening formed by the front and rear ends of the outer coverings 12F and 12B becomes a waist opening WO through which the wearer's trunk passes, and the lower edge of the outer coverings 12F and 12B and the inner covering 200 at both sides in the width direction of the inner covering 200. The portions respectively enclosed by the side edges become the leg openings LO through the legs. The interior body 200 is a portion that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are portions for supporting the interior body 200 with respect to the body of the wearer. The symbol Y in the figure indicates the total length of the diaper in the unfolded state (longitudinal length from the edge of the waist opening WO of the front part F to the edge of the waist opening WO of the back part B), and the symbol X indicates the unfolded state It shows the full width of the diaper.

  Further, the present pants type disposable diaper has a waistline region T defined as a longitudinal direction range (a range from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A and a portion forming the leg opening LO. It has an intermediate region L defined as a front-rear direction range (between the front-rear direction area having the side seal portion 12A of the front body F and the front-rear direction area having the side seal portion 12A of the rear body B). The waistline region T can be divided into a “waist” W that conceptually forms an edge of the waist opening and a “waist lower part” U that is a lower part of the waist. In general, when there is a boundary (for example, the thickness and the elongation rate of the elastic member change) in the waist area T in which the stretching stress in the width direction WD changes, the waist opening WO side is closer to the waist than the boundary closest to the waist opening WO When there is no such boundary, the waist opening WO side becomes the waist part W side than the absorber 56 or the inner body 200. The length in the front-rear direction varies depending on the size of the product, and can be determined as appropriate. For example, the waist portion W can be 15 to 40 mm and the waist lower portion U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are U-shaped or curvilinearly bundled along the circumference of the adherend's leg, and this is a site for inserting the wearer's leg. As a result, the pants-type disposable diaper in the unfolded state has a generally hourglass shape as a whole.

(Inner and outer joint)
The fixing of the inner body 200 to the outer coverings 12F and 12B is not particularly limited, and can be performed by using, for example, a hot melt adhesive. In the illustrated example, the inner surface of the outer package 12F, 12B is applied to the back surface of the inner body 200, that is, the back surface of the liquid impermeable sheet 11 and the root portion 65 of the rising gather 60 in this case It is fixed. The inner and outer joint portions 201 for fixing the inner body 200 and the outer bodies 12F and 12B can be provided substantially in the entire overlapping region, for example, provided in a portion excluding both widthwise end portions of the inner body 200. it can.

(Interior body)
The inner body 200 can have any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the inner body 200 is provided with the top sheet 30 on the body side, the liquid impermeable sheet 11, and the absorbent element 50 interposed therebetween. Yes, it is the main part that carries the absorption function. The code | symbol 40 has shown the intermediate sheet (second sheet) provided between the top sheet 30 and the absorption element 50, in order to make the liquid which permeate | transmitted the top sheet 30 transfer to the absorption element 50 rapidly, and 60 11 shows the rising gathers 60 extending from both sides of the inner body 200 so as to come in contact with the periphery of the wearer's leg in order to prevent leakage of waste on both sides of the inner body 200.

(Top sheet)
The top sheet 30 has a property of transmitting a liquid, and can be exemplified by a non-porous or non-porous non-woven fabric, a porous plastic sheet, and the like. Moreover, among these non-woven fabrics, the raw material fibers are not particularly limited. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc., mixed fibers of which two or more are used, composite fibers Etc. can be illustrated. Furthermore, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. For example, if flexibility and drape are required, the spun bond method and spun lace method require bulkiness and softness, and the air through method, point bond method and thermal bond method are preferable processing methods. .

  The top sheet 30 may be formed of one sheet or may be formed of a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be a single sheet or two or more sheets in the plane direction.

  Both sides of the top sheet 30 may be folded back at the side edge of the absorbent element 50, or may be extended laterally beyond 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 heat sealing, bonding means by material welding such as ultrasonic sealing, or hot melt adhesive for the purpose of preventing positional deviation with respect to a member on the back side. desirable. In the illustrated example, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface.

(Intermediate sheet)
In order to rapidly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a “second sheet”) 40 can be provided, which has a higher liquid permeation rate than the top sheet 30. This intermediate sheet 40 not only allows the liquid to be rapidly transferred to the absorber to enhance the absorption performance by the absorber, but also prevents the phenomenon of "reversion" from the absorber of the absorbed liquid, and always dries on the top sheet 30 It can be in a state of The intermediate sheet 40 can be omitted.

As the intermediate sheet 40, the same material as the top sheet 30, a spunlace nonwoven fabric, a spunbond nonwoven fabric, an SMS nonwoven fabric, a pulp nonwoven fabric, a mixed sheet of pulp and rayon, a point bond nonwoven fabric or a crepe paper can be exemplified. In particular, an air through non-woven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber as 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 non-woven material fiber is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, eccentric and hollow fibers as mixed fibers of all or part of the raw material fibers.

  The intermediate sheet 40 in the illustrated form is disposed shorter than the width of the absorbent body 56 in the center, but may be provided over the entire width. The longitudinal length of the intermediate sheet 40 may be the same as the total length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length centering on the liquid receiving area.

  The intermediate sheet 40 may be fixed to a member adjacent to the rear side by heat sealing, bonding means by material welding such as ultrasonic sealing, or hot melt adhesive for the purpose of preventing positional deviation with respect to the rear 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 absorber 56 by a hot melt adhesive applied to the back surface.

(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 non-woven fabric having a plastic film on the surface of a non-woven fabric, or a plastic film A laminated sheet etc. which overlapped and joined a nonwoven fabric etc. can be illustrated. For the liquid impermeable sheet 11, it is preferable to use a material having liquid impermeability and moisture permeability, which is preferably used from the viewpoint of preventing migration. 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 to form a sheet, and then stretching in a uniaxial or biaxial direction Is widely used. In addition, non-woven fabric using microdenier fibers, reinforcement of leakproofness by reducing the voids of the fibers by applying heat and pressure, and methods of coating highly water-absorbent resin or hydrophobic resin or water repellent agent Thus, a sheet which is made liquid impermeable without using a plastic film can also be used as the liquid impermeable sheet 11.

  The liquid impervious sheet 11 has a width that fits on the back side of the absorbent element 50 as shown, and the side of the top sheet 30 of the absorbent element 50 is wound around both sides of the absorbent element 50 in order to enhance leakproofness. It can also be extended to both sides. The width of the extension portion is preferably about 5 to 20 mm on each side.

(Get up and gather)
The rising gathers 60 are for preventing side leakage, extend along the both sides of the inner body 200 over the entire longitudinal direction LD, and stand upright from the side of the inner body 200 to the front side. The rising gather 60 in the illustrated example is such that the root side portion stands obliquely toward the center in the width direction, and the tip side portion stands obliquely toward the width direction outside from the middle portion, but is limited thereto Rather, it is possible to make appropriate changes, such as a form of standing up to the center in the width direction as a whole.

  Describing in more detail, the rising gather 60 of the illustrated example folds the band-shaped gather non-woven fabric 62 having a length equal to the longitudinal length of the inner body 200 in the width direction WD at the tip end and folds it into two. A plurality of elongated gather elastic members 63 are fixed between the folded portion and the sheet in the vicinity thereof in a stretched state along the longitudinal direction and at intervals in the width direction WD. The proximal end (the end opposite to the sheet-folded portion in the width direction WD) of the rising gather 60 is fixed to the side opposite to the liquid impermeable sheet 11 in the inner body 200 The portion other than the root portion 65 is a main portion 66 (portion on the side of the folded portion) which extends from the root portion 65. Further, the main body portion 66 has a root side portion extending to the center in the width direction, and a tip side portion which is folded back at the tip of the base side portion and extends to the outer side in the width direction. This form is a surface contact type rising gather 60, but a line contact type rising gather 60 which is not folded back in the width direction can also be adopted. And while being made into the falling part 67 fixed with respect to the side surface of the top sheet 30 in the state of front-back both ends of the main-body part 66 in the state of falling down, the front-back direction intermediate part located among these is non-fixed A gather elastic member 63 along the longitudinal direction LD is fixed in an extended state to at least a tip end portion of the free portion 68.

  In the rise-up gather 60 configured as described above, the contraction force of the gather elastic member 63 acts to bring the both ends in the back and forth direction closer, but the both ends in the front and back direction of the main body 66 are fixed so as not to stand up. On the other hand, since it is a non-fixed free part 68 between them, only the free part 68 stands up to abut on the body side as shown by the arrow in FIG. In particular, when the root portion 65 is located on the back side of the interior body 200, the free portion 68 is erected so as to open outward in the width direction at the crotch and its vicinity, so the riser gathers 60 abuts around the legs. It comes to improve fit.

(Absorbent element)
The absorbent element 50 is not particularly limited, but in the present example, it has an absorbent body 56 and a packaging sheet 58 which wraps the whole of the absorbent body 56. The packaging sheet 58 can also be omitted.

(Absorber)
The absorber 56 can be formed by an assembly of fibers. As this fiber assembly, a filament assembly obtained by opening as needed a fiber (a fiber bundle) of synthetic fibers such as cellulose acetate in addition to those obtained by stacking short fibers such as cotton-like pulp and synthetic fibers Can also be used. It is preferable that the superabsorbent polymer particles be dispersed and held in the absorbent body 56.

  The absorber 56 may have a rectangular shape, but as shown also in FIG. 7, it has a front end portion, a rear end portion, and a narrow portion 56N located between them and narrower in width than the front end portion and the rear end portion. The hourglass shape is preferable because the fit around the legs of the absorber 56 itself and the rising gather 60 is improved.

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

(Superabsorbent polymer particles)
The absorbent body 56 may contain superabsorbent polymer particles in part or all thereof. The 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 particular limitation, but those having a water absorption of 40 g / g or more are preferable. Examples of the superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based particles, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and crosslinked sodium carboxymethyl cellulose. A thing, an acrylic acid (salt) polymer, etc. can be used. The shape of the superabsorbent polymer particles is preferably in the form of commonly used powdery particles, but other shapes may 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 suitably used. If the water absorption rate is too slow, so-called reversion in which the liquid supplied into the absorber 56 returns out of the absorber 56 tends to occur.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are suitably used. Thereby, even in the case of the bulky absorber 56, it is possible to effectively suppress the sticky feeling after liquid absorption.

The basis weight of the superabsorbent polymer particles can be appropriately determined in accordance with the absorption required for the application of the absorber 56. Therefore, although it can not generally say, it can be 50-350 g / m < ² >.

(Packaging sheet)
When the packaging sheet 58 is used, tissue paper, in particular, crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used as the material. However, it is desirable that it is a sheet from which the superabsorbent polymer particles can not escape. When non-woven fabric is used instead of crepe paper, hydrophilic SMS non-woven fabric (SMS, SSMMS, etc.) is particularly preferable, and polypropylene, polyethylene / polypropylene composite material, etc. can be used as its material. The coating 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 superabsorbent polymer particles from the front and rear edges, a cylinder is used to surround the front and back and both sides of the absorber 56. It is preferable that the front and rear edges be wound around the front and rear edges of the absorbent body 56, and the overlapping portions and the overlapping portions of the front and rear protruding portions be joined by joining means such as hot melt adhesive and material welding.

(Exterior body)
The exterior bodies 12F and 12B are composed of a front exterior body 12F that is a portion that configures the front body F and a rear exterior body 12B that is a portion that configures the back body B, and are a front exterior body 12F and a rear exterior body 12B. Is not continuous on the crotch side, and is separated in the longitudinal direction LD (exterior bisection type). The separation distance 12d can be, for example, about 40 to 60% of the total length Y. In addition, as shown in FIGS. 8 and 9, the exterior body 12 can also be an integral body that continues through the crotch from the front body F to the back body B (exterior integrated type).

  In the case of the external two-part type pants-type disposable diaper, the inner body 200 is exposed between the front outer body 12F and the rear outer body 12B, so that the liquid impermeable sheet 11 is not exposed on the back surface of the inner body 200. Preferably, a cover non-woven fabric 20 covering the back surface of the inner body 200 is provided between the front outer body 12F and the inner body 200 and between the rear outer body 12B and the inner body 200. The material of the cover non-woven fabric 20 is not particularly limited, and may be, for example, the same material as the outer non-woven fabric layer 12S of the outer package 12 or the inner non-woven fabric layer 12H (a porous non-woven layer or a non-porous non-woven layer described later may be used). . The front-rear direction range of the cover non-woven fabric 20 is not particularly limited as long as it has a portion 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 the rear end of the inner body 200. It may be present, as shown in FIG. 7, from the longitudinal middle position of the region where the front exterior body 12F and the interior body 200 overlap from the front to back direction middle position of the region where the rear exterior body 12B and the interior body 200 overlap. It may extend in the longitudinal direction LD.

  The exterior bodies 12F, 12B have a waist portion which is a range in the front-rear direction corresponding to the waist region T. Further, in the present embodiment, the front exterior body 12F does not have a portion corresponding to the intermediate region L, but the rear exterior body 12B has the ridge portion cover portion C extending from the waistline region T to the intermediate region L side. doing. Although not shown, the front exterior body 12F is provided with a heel cover portion extending from the waist region T toward the intermediate region L side, the groin cover portion is provided but the collar portion cover portion is not provided, or the front exterior body 12F and It is not necessary to provide a portion corresponding to the middle region L in both of the back side exterior body 12B. Further, in the illustrated example, the lower edge of the buttocks cover portion C is formed in a straight line along the width direction WD like the lower edge of the front exterior body 12F, but the lower edge is located on the waist opening side It can also be a curve that comes to

  As shown in FIGS. 2 to 5, the exterior bodies 12F and 12B have front and back sides formed by the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H. Needless to say, one of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H corresponds to the first non-woven fabric layer of the present invention, and the other corresponds to the second non-woven fabric layer of the present invention. The non-woven fabric layer 12H is formed by folding a sheet of sheet material so that a fold is positioned on the waist opening side as shown in FIG. 5, and as shown in FIG. Can also be formed. Alternatively, the innermost portion 12r of these sheet members can be extended to the end of the inner body 200 on the side of the waist opening WO (see FIG. 9). Further, at least one of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H may be formed of a sheet material in which a portion thereof is different from the other portions.

  As constituent fibers of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H, for example, synthetic fibers of olefin type such as polyethylene or polypropylene, polyester type, polyamide type (including composite fibers such as core and sheath besides monocomponent fibers) In addition, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be selected without particular limitation, and they can be used by mixing them. In order to enhance the flexibility of the non-woven fabric layers 12S and 12H, it is preferable to make the constituent fibers be crimped fibers. In addition, the constituent fibers of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are hydrophobic fibers or water-repellent fibers (water-repellent fibers even if they are hydrophilic fibers (including hydrophobic fibers rendered hydrophilic by a hydrophilizing agent) And water repellent fiber which is rendered water repellent by the agent). Non-woven fabrics are generally short-fiber non-woven fabrics, long-fiber non-woven fabrics, spun-bonded non-woven fabrics, melt-blown non-woven fabrics, spun-laced non-woven fabrics, thermal-bonded (air-through) non-woven fabrics, needle punches, depending on the fiber length, sheet forming method, fiber bonding method, and laminated structure. Non-woven fabric, point-bonded non-woven fabric, laminated non-woven fabric (SMS non-woven fabric sandwiching a meltblown layer between spun-bonded layers, SMMS non-woven fabric, etc.) etc., any of these non-woven fabrics should be used as the outer non-woven layer 12S and the inner non-woven layer 12H. Can.

The fineness and basis weight of the constituent fibers of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H can be appropriately determined, but in the normal case, it is 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, at least one of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H is a perforated non-woven fabric in which the holes 14 penetrating in the thickness direction are scattered. As shown in FIGS. 11 and 12, if the inner non-woven fabric layer 12H on the skin side of the wearer is a non-porous non-woven fabric and the outer non-woven fabric layer 12S is a non-porous non-woven fabric, the influence of the pores 14 on the touch is eliminated. Can. Further, since only one of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H has the hole 14, the skin is not exposed at the time of wearing, and leakage through the hole 14 can be prevented. Although not shown, the inner non-woven fabric layer 12H on the skin side of the wearer may be a perforated non-woven fabric, and the outer non-woven fabric layer 12S may be a non-porous non-woven fabric. As shown in FIGS. 13 and 14, both the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are perforated non-woven fabrics, and the holes 14 of one non-woven non-woven fabric do not overlap the holes 14 of the other non-woven non-woven fabric. It is also preferred to be a structure. In this case, by making both the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H into a perforated non-woven fabric, higher air permeability can be obtained. In addition, since the holes 14 of one perforated nonwoven fabric do not overlap the holes 14 of the other perforated nonwoven fabric, the skin is not exposed at the time of wearing, and leakage through the holes 14 can be prevented. As shown in FIG. 15, both the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are perforated non-woven fabrics, and the holes 14 of one non-woven non-woven fabric and the holes 14 of the other non-woven non-woven fabric are completely or partially. May overlap. Although not shown, when both the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are perforated non-woven fabrics, the pores 14 of one perforated non-woven fabric and the other are present in the majority (for example, 50% or more area) Although the holes 14 of the non-woven non-woven fabric do not overlap with each other, the holes 14 of one non-woven non-woven fabric and the holes 14 of the other non-woven non-woven fabric may partially 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 true circle as shown in FIG. 10 (e) (f), an oval as shown in FIG. 10 (a) (d), The shape may be any shape such as a triangle, a rectangle, a polygon such as a rhombus, a star, a cloud or the like. As shown in FIG. 10 (c), holes of different shapes may be mixed, but in that case, the dimensions in the expansion and contraction direction are preferably substantially the same, and it is more preferable that all the holes have a single shape. preferable. The dimensions of the individual holes 14 are not particularly limited, but the dimension in the orthogonal direction XD (dimension of the longest part) 14L is preferably 0.3 to 5.0 mm, particularly 0.6 to 2.0 mm, and the stretching direction The dimension 14W of the ED (dimension of the longest part) is preferably 0.3 to 3.0 mm, particularly 0.4 to 1.5 mm. When the shape of the hole 14 is a long shape in one direction such as a long hole, an oval, a rectangle, a rhombus or the like (a shape in which the total length in one direction is longer than the total length in the direction orthogonal thereto) The (dimension of the longest part) is preferably 1.2 to 2.5 times the dimension in the direction orthogonal to this (dimension of the longest part). When the shape of the hole 14 is long in one direction, the longitudinal direction of the hole 14 is preferably the longitudinal 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 preferable that it is about 0 to 15.0% (especially 5.0 to 10.0%).

  The planar arrangement of the holes 14 can be appropriately determined as long as the rows of the holes 14 arranged at intervals in the direction orthogonal to the expansion and contraction direction ED are arranged at intervals in the expansion and contraction direction ED. For example, as shown in FIGS. 10 (a), (c) and (d), in the arrangement of the holes 14, the rows of the holes 14 linearly arranged at predetermined intervals in the orthogonal direction XD have predetermined intervals in the expansion / contraction direction ED. Preferably in the form of a repeating matrix. In this case, as shown in FIG. 10 (a), the spacing 14x of the holes 14 in the expansion / contraction direction ED is shorter than the spacing 14y in the orthogonal direction XD of the holes 14, as shown in FIG. As shown in FIG. 10D, the spacing 14x between the space 14x between the expansion and contraction direction ED of the hole 14 and the orthogonal direction XD between the hole 14 is substantially equal. The array may be longer than the interval 14y in the direction XD. Further, as shown in FIGS. 10 (b) and 10 (e), the rows of holes 14 linearly arranged at predetermined intervals in the orthogonal direction XD are shifted in the orthogonal direction XD at intervals in the expansion / contraction direction ED. It can be arranged in parallel. The example shown in FIG. 10B is a so-called staggered (hexagonal grid) arrangement in which the arrangement of the holes 14 is alternated in the row of adjacent holes 14. Further, as shown in FIG. 10 (f), as long as the row of the holes 14 adjacent to each other has a portion continuous in the orthogonal direction XD, the holes 14 may be arranged in a wavy line having a center line along the orthogonal direction. A row of holes 14 aligned in the direction orthogonal to the expansion / contraction direction ED is included in the ones spaced apart in the expansion / contraction direction ED.

  The orthogonal direction interval 14y of the holes 14 and the expansion and contraction direction interval 14x may be constant or may be changed, respectively. The space 14y in the orthogonal direction of the holes 14 and the space 14x in the expansion and contraction direction can be appropriately determined, but in consideration of air permeability, 14y is 0.9 to 8.0 mm, 14x is 2.0 to 10 mm, and particularly 14y is 1. It is desirable that 0 to 3.0 mm and 14 x be in the range of 3.0 to 5.0 mm.

  The cross-sectional shape of the hole 14 is not particularly limited. For example, even if the holes 14 are punched-type holes whose peripheral edge is formed by the cut end of the fibers as shown in FIG. 16 (d), the holes 14 are holes as shown in FIGS. 16 (a) to 16 (c). There may be almost no cut ends of fibers at the periphery of 14 and non-punched holes 14 (the fiber density of the edge is high) formed by inserting and pushing out pins between the fibers. As shown in FIG. 16 (d), 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. .

  The non-puncture-type holes 14 are such that the diameter of the holes 14 decreases as going from the pin insertion side to the opposite side. This includes those in which the diameter of the holes 14 continues to decrease throughout the thickness direction of the non-woven fabric layer, and also those in which the decrease in diameter of the holes 14 substantially disappears in the middle of the thickness direction. In such a non-punching type hole, as shown in FIGS. 16 (a) and 16 (c), a fiber is projected to the edge of the hole 14 on the side opposite to the pin insertion side and the side opposite to the pin insertion side. A portion (burr) 14e is formed, and a protrusion 14e is not formed on the pin insertion side, and fibers are inserted at the edge of the hole 14 on the opposite side of the pin insertion side as shown in FIG. The protruding portion 14e pushed out to the side opposite to the side is formed, and the protruding portion 14e formed by pushing out the fiber to the pin inserting side is formed on the pin insertion side. Furthermore, in the hole 14 of the former type, the protrusion height 14h of the protrusion 14e is substantially uniform as shown in FIG. 16 (a), and the protrusion 14e is as shown in FIG. 16 (c), It includes an opposing portion having the highest projecting height 14i and an opposing portion opposing in the direction perpendicular to the projecting portion 14i and having the lowest projecting height 14j. It is desirable that the projecting portion 14e be cylindrical continuously in the circumferential direction of the hole, but the projecting portion 14e of a part or all of the hole 14 is formed only in a part of the circumferential direction of the hole 14 It is also good. The protruding heights 14 h, 14 i and 14 j (apparent height without applying pressure measured using an optical microscope) are preferably about 0.2 to 1.2 mm. Further, the highest protrusion height 14i of the protrusion 14e is preferably about 1.1 to 1.4 times the lowest protrusion height 14j. The protrusion height of the protrusion 14 e may change in the circumferential direction of the hole 14.

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

The fineness, the basis weight and the thickness of the constituent fibers of the non-woven fabric can be determined as appropriate, but in the normal case, they are respectively about 1.8 to 6.0 dtex, about 15 to 25 g / m ^2, about 0.1 to 1.3 mm It is preferable that Further, the bending resistance in the MD direction (width direction) of the perforated non-woven fabric is preferably 35 to 100 mm, particularly 40 to 70 mm in a non-perforated state before perforation processing, and 10 to 50 mm in a post-perforation processing state In particular, the thickness is preferably 15 to 40 mm.

(Stretch area)
In the outer coverings 12F and 12B, an elongated elastic member 19 is provided between the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H, and an expansion / contraction area A2 is formed to be elastically expanded or contracted in the width direction WD along with the expansion / contraction of the elastic member 19 ing. That is, in the state of natural length, in the elastic region A2, the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are shrunk as the elastic member shrinks, and a large number of creases 80 are formed. In addition, when the stretchable region A2 is stretched in the width direction WD, the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are stretched to a predetermined elongation rate at which the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are stretched. The elastic member 19 may be in the form of a string, a string, or a band as long as it is elongated. Further, as the elastic member 19, synthetic rubber may be used or natural rubber may be used.

  The elastic member 19 is fixed to the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H at least at both ends of the elongating direction ED in at least the elongating area A2. Although the fixing means of the elastic member 19 is not particularly limited, it is preferable to use the hot melt adhesive 19H. For example, as shown in FIG. 17, the hot melt adhesive 19H is intermittently applied to the outer peripheral surface 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 scoop nozzle. 19 can be sandwiched between the outer non-woven layer 12S and the inner non-woven layer 12H. In this case, the elastic member 19 is fixed to the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H via the hot melt adhesive 19H only at both end portions in the expansion and contraction region in the arrangement region. As shown in FIGS. 11 and 13, after the hot melt adhesive is continuously applied to the outer peripheral surface of the elastic member 19 by an application means such as a comb gun or a sure wrap nozzle, the elastic member 19 is used as the outer nonwoven fabric layer 12S and the inner side. It can also be sandwiched between the nonwoven fabric layers 12H. In this case, the elastic member 19 is fixed to the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H in the longitudinal direction as well as at both ends of the stretch direction ED in the stretch area A2. In addition, although not shown, after applying a hot melt adhesive to the arrangement position of both ends of the elastic direction 19 of the elastic member 19 on the opposing surface of at least one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, the outer nonwoven fabric The elastic member 19 can also be sandwiched between the layer 12S and the inner non-woven layer 12H. In this case, the hot melt adhesive may be continuous in the orthogonal direction XD or may be intermittently arranged in the orthogonal direction XD. Furthermore, in these cases, the continuous portion of the hot melt adhesive may extend over a plurality of elastic members.

In the case of the underpants-type disposable diaper as an illustration example, it is desirable to provide the elastic member 19, ie, an expansion-contraction area | region, in the following location. That is, between the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H in the waist portion W of the exterior body 12F, 12B, a plurality of waist elastic members 17 are spaced in the front-rear direction so as to be continuous over the entire width direction WD. Is attached. In addition, one or more of the waist elastic members 17 disposed in the area adjacent to the lower waist portion U may overlap with the interior body 200, or the width direction center overlapping the interior body 200. It may be provided on both sides in the width direction except for the part. The waist elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of a synthetic rubber. In the case of a natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1 to 1. It is preferable to provide about 3 to 22 yarn rubbers of about 0 mm ² ) at intervals of 4 to 12 mm, whereby the elongation of the waist portion W in the width direction WD is about 150 to 400%, particularly about 220 to 320%. Preferably there. In addition, the waist portion W does not have to use the waist portion elastic member 17 having the same thickness in all the longitudinal directions LD or to have the same extension ratio. For example, in the upper and lower portions of the waist portion W The thickness and the extension rate may be different.

  Also, between the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H in the lower waist portion U of the exterior body 12F, 12B, a plurality of lower waist elastic members 15 made of elongated elastic members are attached at intervals in the front-rear direction It is done.

The waist lower portion elastic member 15 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of a synthetic rubber. In the case of a natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1 to 1. It is preferable to provide about 5 to 30 threads of rubber of about 0 mm ² ) at intervals of 1 to 15 mm, particularly 3 to 8 mm, and the extension ratio of the lower waist portion U in the width direction WD by this is 200 to 350%, particularly It is preferable that it is about 240 to 300%.

  In addition, a plurality of cover elastic members 16 made of elongated elastic members are attached between the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H in the buttocks cover C of the rear exterior body 12B at intervals in the front-rear direction. ing.

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

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

(Non-stretchable area)
When the elastic members 15 and 16 are provided in the front-rear direction range having the absorber 56 as in the lower waist portion U and the buttocks cover C in the illustrated example, the width direction WD of the absorber 56 is partially or entirely In order to prevent shrinkage, the widthwise middle (preferably including the entire of the inner and outer joints 201) including a part or all of the portion overlapping the absorber 56 in the widthwise direction WD is taken as the non-stretchable area A1, and the width direction Both sides are set as an expansion and contraction area A2. The waist portion W is preferably set as the stretchable region A2 over the entire width direction WD, but the non-stretchable region A1 may be provided in the middle in the width direction as in the waist lower portion U.

  The elastic region A2 and the non-elastic region A1 supply the elastic members 15 and 16 between the inner non-woven fabric layer 12H and the outer non-woven fabric layer 12S, and the elastic members 15 and 16 are at least both ends in the elastic region A2 in the elastic region A2. The parts are fixed via the hot melt adhesive, not fixed in the non-stretchable area A1, but pressed in one area in the width direction at the non-stretchable area A1. It is possible to construct by cutting by heating, or cutting almost the whole of the elastic members 15 and 16 into pieces by pressing and heating, and leaving the stretchable area A2 stretchable while killing the non-stretchable area A1. . In the former case, as shown in FIG. 4, in the non-stretchable area A1, the outer non-woven fabric in a state in which the remaining cut portion continuing from the elastic members 15 and 16 in the stretchable area A2 is contracted alone to the natural length as the unnecessary elastic member 18 It will remain between the layer 12S and the inner non-woven fabric layer 12H, and in the latter case, although not shown, it is continuous with the cutting remainder continuous from the elastic members 15 and 16 of the elastic region A2 and the elastic members 15 and 16 of both elastic regions A2. The cut pieces of the non-elastic member are left between the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H in a state of being shrunk to the natural length alone as the unnecessary elastic member.

(Joint structure of outer non-woven fabric layer and inner non-woven fabric layer)
As shown in FIGS. 11 and 12, the stretchable area A2 includes a sheet bonding portion 70 in which the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H are bonded. This sheet bonding portion 70 is spaced in the orthogonal direction XD. And formed in a striped pattern substantially continuous in the stretching direction ED. As described above, since the sheet bonding portion 70 is formed at intervals in at least the orthogonal direction XD orthogonal to the expansion and contraction direction ED, good air permeability and flexibility can be ensured. Further, in this case, by integrating the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H in each sheet bonding portion 70, the ridges 80 are formed in a wave shape along each other. Then, under the influence of this, even in the region between the adjacent sheet bonding portions 70, as shown in FIG. 12C, the shape of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H in the sheet bonding portion 70 is generally continued. As shown, the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H have corrugations 80 formed on the front and back sides in a wavelike manner along each other. The sheet bonding portion 70 may be continuous over the entire expansion / contraction direction ED of the expansion / contraction area A2, but may be continuous only in a partial range in which the plurality of ridges 80 are formed.

  However, when the sheet bonding portions 70 are intermittently arranged in the orthogonal direction XD, the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H can be freely deformed in the region between the adjacent sheet bonding portions 70. Further, in the case of the perforated nonwoven fabric in which the holes 14 penetrating in the thickness direction are arranged, the part having the holes 14 is weak and easily bent in a state where it can be deformed alone. Therefore, unlike the illustrated example, at least one of the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H is a non-porous non-woven fabric, and the hole 14 is in one region across the sheet bonding portion 70, but in the other region. If there is no hole 14, a ridge 80 will be formed in one of the areas so that the hole 14 will be a fold, but not in the other (not in the orthogonal direction XD). 80 are formed. That is, the ridges 80 are branched or the valleys are partially widened, and it is difficult to form the ridges 80 which are in order as a whole.

  On the other hand, in the illustrated example, the arrangement of the holes 14 is such that the rows of the holes 14 arranged at intervals in the orthogonal direction XD are arranged at intervals in the expansion / contraction direction ED. Further, the spacing 14 y in the orthogonal direction XD of the holes 14 in the row of the bores 14 is narrower than the spacing 70 y in the orthogonal direction XD of the sheet bonding portion 70. As a result, as shown in FIG. 18, the holes 14 exist in all the regions between the adjacent sheet joint portions 70, and the holes 14 form a row in the direction orthogonal to the expansion / contraction direction ED. Over the entire area divided by the joint 70, it is easy to form a series of ridges 80 in which the holes 14 become folds. That is, it becomes difficult for the ridges 80 to branch or to make the valleys partially wide, and as a whole, it becomes easy to form the aligned ridges 80 extending along the row of the holes 14.

  The spacing 14 y in the orthogonal direction XD of the holes 14 in the row of the bores 14 is not particularly limited as long as it is shorter than the spacing 70 y in the orthogonal direction XD of the sheet bonding portion 70. For example, when the spacing 14y in the orthogonal direction XD of the holes 14 in the row of the bores 14 is 1/6 or more and less than 1/2 of the spacing 70y in the orthogonal direction XD of the sheet bonding portion 70, between adjacent sheet bonding portions 70 The presence of two or more holes 14 in all of the regions of (1) makes it easier to form a series of ridges 80 in which the holes 14 are broken. Therefore, it becomes easier to form the weir 80 which is even more orderly. Further, in the example shown in FIG. 2, in the waist portion W, the spacing 14 y in the orthogonal direction XD of the holes 14 in the row of the holes 14 is longer than the spacing in the orthogonal direction XD of the waist elastic member 19. When the hot melt adhesive 19H is disposed at a portion overlapping the elastic member 19, the above condition is not satisfied, but the above condition is satisfied except for the waist portion W. Of course, it is desirable that all of the stretchable regions A2 satisfy the magnitude relationship of the intervals 14y and 70y, but it is not necessary that all of the stretch regions A2 meet the magnitude relationship of 14y and 70y as in this example.

  The sheet bonding portion 70 is not particularly limited as long as the sheet bonding portion 70 is formed in a stripe pattern which is spaced in the orthogonal direction XD and substantially continuous in the expansion and contraction direction ED. For example, as in the example shown in FIG. 11 and FIG. 13, the sheet bonding portion 70 may only be formed of the hot melt adhesive 19H disposed in a portion overlapping with the elastic member 19. Such a sheet bonding portion 70 can be manufactured by sandwiching the elastic member 19 coated with the hot melt adhesive 19H with the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H, and is widely used in the field of disposable wearing articles. It is used. However, in the structure of the sheet bonding portion 70, the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H shrink at the sheet bonding portion 70 together with the elastic member 19, and the fiber structure becomes dense. Therefore, as shown in FIG. 18, in principle, the wedge 80 is likely to be divided at the sheet bonding portion 70. On the other hand, when the arrangement of the holes 14 described above and the arrangement relationship between the holes 14 and the sheet bonding portion 70 are adopted, the influence of the holes 14 becomes dominant with respect to the formation of the ridges 80. Despite the tendency of 80 to be divided, as a whole, a well-defined weir 80 extending along the row of holes 14 is likely to be formed.

  As shown in FIG. 17 instead of (or together with) disposing the hot melt adhesive 19H in the portion overlapping the elastic member 19, the region extending between the elastic members 19 adjacent to the orthogonal direction XD is expanded or contracted Sheet junctions 70 may be formed that are substantially continuous with the ED. In the latter case, the sheet bonding portion 70 may be formed not only by a hot melt adhesive but also by material welding such as heat sealing or ultrasonic sealing. In addition, it goes without saying that the hot melt adhesive 19H for fixing the both ends of the elastic member 19 may join the outer non-woven fabric layer 12S and the inner non-woven fabric layer 12H.

  The dimension 70L of the sheet bonding portion 70 in the orthogonal direction XD can be appropriately determined, but is preferably short, 0.2 to 0.6 times the spacing 19y of the adjacent elastic members 19 in the orthogonal direction XD, particularly 0.3 It is preferable that it is -0.5 times.

  Although the cross-sectional structure of the holes 14 is not particularly limited as described above, the diameter of the holes 14 is the non-woven fabric layer side opposite from the opposite non-woven fabric layer side (for example, in the example shown in FIGS. If it becomes smaller as it goes from the outside to the inside of the outer non-woven fabric layer 12S, as in the example shown in FIG. 12 and FIG. 14, the surface opposite to the opposite non-woven fabric layer tends to be broken like a valley fold. Thus, the bag 80 is more clean and tidy. Further, in the case of the weir 80 formed in this case, the row of the holes 14 is located at the bottom between the weirs and the weir, and as shown in FIG. The hole 14 is exposed as shown in FIG. 18 (c) in a state of being hidden at the time of use etc. although hidden between the eyebrows. It is a matter of course that the change in appearance is intended to improve the breathability by this change, and it is also advantageous in that it is easy to appeal to the user that the product is a good breathable product. Furthermore, some of the sheet joints 70 may be arranged to pass through the holes 14. In this case, if the sheet joints 70 are formed of the hot melt adhesive 19H, the holes are hot from the holes 14. The melt adhesive 19H is exposed. However, when the row of holes 14 is located at the bottom between the eyebrows and the eyebrows, the hot melt adhesive 19H exposed from the holes 14 has an advantage in that it is difficult to touch the skin.

  In particular, when the inner non-woven fabric layer 12H on the skin side of the wearer is a non-porous non-woven fabric and the outer non-woven fabric layer 12S is a non-porous non-woven fabric, the diameter of the pores 14 of the non-woven fabric is opposite to the opposing non-woven fabric layer side When it becomes smaller as it goes from the side toward the facing non-woven fabric layer side, as shown in FIG. 12C and FIG. 18B, the ridge 80 formed on the inner non-woven fabric layer 12H becomes thin wrinkles and the outer non-woven fabric layer The ridge 80 formed on 12S becomes a thick ridge that bends gently. Therefore, the contact area between the inner non-woven fabric layer 12H and the skin is small, and the gap between the eyebrows and the eyebrows is large, so that the air permeability is particularly excellent. The wrinkles 80 of the outer non-woven fabric layer 12S are unlikely to be deformed to damage the appearance such as falling down, and are excellent in shape stability.

  As mentioned above, the arrangement of the holes 14 is not limited, but affects the shape of the weir 80. Therefore, if the row of holes 14 linearly arranged at predetermined intervals in the orthogonal direction XD has a matrix shape repeating at predetermined intervals in the expansion / contraction direction ED, in particular, the ridges 80 linearly extend along the orthogonal direction XD It is preferable because it tends to be neat and tidy.

Moreover, although the dimension and arrangement | positioning of the specific hole 14 and the sheet | seat junction part 70 can be determined suitably, it is especially preferable in the following range.
Dimension 14 W of expansion and contraction direction ED of hole 14: 0.3 to 3.0 mm (especially 0.4 to 1.5 mm)
Dimension 14L in the orthogonal direction XD of the hole 14: 0.3 to 5.0 mm (especially 0.6 to 2.0 mm)
Spacing 14y in the orthogonal direction XD of the holes 14 in the row: 1.0 to 5.0 mm (especially 1.0 to 3.0 mm)
Distance 14x: 2.5 to 10.0 mm (especially 3.0 to 6.0 mm) of expansion and contraction direction ED of the row
The distance between the sheet bonding portions 70 in the orthogonal direction XD: 5 to 10 mm (especially 5.0 to 7.0 mm)
Dimension 70L of the sheet bonding portion 70 in the orthogonal direction XD: 0.5 to 5.0 mm (especially 1.0 to 3.0 mm)

  The holes 14 and the sheet bonding portion 70 can be provided only in the stretchable area A2, but can be provided over a wider area including the non-stretchable area A1 as in the examples shown in FIGS. 8 and 9.

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

  The front-rear direction means the direction (longitudinal direction) indicated by reference numeral LD in the drawing, the “width direction” means the direction (horizontal direction) indicated by WD in the drawing, and the front-rear direction and the width direction It is orthogonal.

  -"MD direction" and "CD direction" mean the flow direction (MD direction) and the transverse direction (CD direction) orthogonal to this in the manufacturing equipment, one of which is the front-back direction, the other Is the width direction. The MD direction of the non-woven fabric is the direction of fiber orientation of the non-woven fabric. The fiber orientation is the direction along which the fibers of the non-woven fabric are aligned. For example, the measurement method according to the fiber orientation test method based on the zero distance tensile strength of TAPPI standard method T481, and the tensile strength ratio in the front and back direction and width direction It can be determined by a simple measurement method of determining the orientation direction.

  ・ "Front side" means one closer to the wearer's skin when wearing a pants-type disposable diaper, and "back side" means one farther from the wearer's skin when wearing a pants-type disposable diaper .

  ・ "Surface" means the side closer to the skin of the wearer when wearing the pants-type disposable diaper of the member, and "back side" means the skin of the wearer when wearing the pants-type disposable diaper It means the far side.

  "Center" in the case of 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 represents the total area of the target portion (for example, holes) in the target area (for example, non-woven fabric) divided by the area of the target area is there. In the embodiment in which a large number of target portions are provided at intervals, it is desirable to set the target area to a size that includes 10 or more target portions and to obtain the area ratio. For example, the area ratio of the holes can be measured by the following procedure using, for example, the trade name VHX-1000 manufactured by KEYENCE Corporation under the measurement conditions of 20 times.
(1) Set the lens to 20x and adjust the focus. Adjust the position of the non-woven fabric 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 color extraction of "Area measurement" in "Measurement / Comment". Click on the hole part.
(4) Click "Collective measurement", check "Display measurement result window" and save as CSV data.

  "Stretch rate" means the value when natural length is 100%. For example, an extension rate of 200% is synonymous with an extension 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% To 49.0 g of the mixture), 1.0 g of the superabsorbent polymer is added, and the mixture is stirred by a stirrer. The formed gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours and then returned to normal temperature, and the gel strength is measured with a curd meter (manufactured by I. techno Engineering: Curdmeter-MAX ME-500).

  ・ "Age" is measured as follows. After the sample or test piece is predried, it is left in a test room or apparatus under standard conditions (test place: temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to be in a constant weight state. Pre-drying refers to bringing a sample or test piece to a constant weight 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 percentage is 0.0%. From a test piece in a constant weight state, using a template for sampling (100 mm × 100 mm), cut out a sample of 100 mm × 100 mm in size. The weight of the sample is measured, multiplied by 100, the weight per square meter is calculated, and taken as the basis weight.

- "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 0.098 N / cm ^2, and the pressure area: automatically measured under the conditions of 2 cm ^2.

  "Hardness of bending" means "8.21.1 A method (45 ° cantilever method)" of JIS L 1096: 2010 "Dough test method for fabrics and knits". The value before drilling (non-porous non-woven fabric) in the non-porous non-woven fabric is the same non-porous non-woven fabric as the non-porous non-woven fabric before drilling is the same except for the presence or absence of pores (fiber composition, fineness, fabric weight, etc.) Prepare and measure.

  The amount of water absorption is measured according to JIS K 7223-1996 “Test method of water absorption of highly water-absorbent resin”.

  -Water absorption rate is defined as "time to end point" when JIS K 7224-1996 "Water absorption rate test method for super absorbent polymer" using 2 g of highly absorbent polymer and 50 g of physiological saline. .

  "Expanded state" means a flat state without contraction or slack.

  -Unless otherwise indicated, the dimension of each part means the dimension in the unfolded state, not the natural length state.

  ・ If there is no description about the environmental conditions in the test or measurement, the test or measurement shall be performed in the test room or equipment under the standard condition (test place: temperature 23 ± 1 ° C, relative humidity 50 ± 2%) Do.

  INDUSTRIAL APPLICABILITY The present invention is applicable to general disposable wear articles such as pad type disposable diapers, disposable swimwear, diaper covers, sanitary napkins, and the like in addition to pants-type disposable diapers and tape-type disposable diapers.

  11: Liquid impermeable sheet, 12: exterior body, 12A: side seal portion, 12B: rear side exterior body, 12F: front side exterior body, 12H: inner non-woven layer, 12S: outer side non-woven layer, 14: hole, 14e: Protrusive portion, 18: unnecessary elastic member, 19: elastic member, 19H: hot melt adhesive, 20: cover nonwoven fabric, 200: interior body, 201: inside and outside joint portion, 30: top sheet, 40: intermediate sheet, 50: absorption Element, 56 Absorber, 58, Packaging sheet, 60 Rising gather, 62: Gathered non-woven fabric, A1: non-stretching area, A2: stretching area, C: buttock cover, L: middle area, LD: front to back direction, LO ... Leg opening, T ... waist area, U ... lower waist, W ... waist, WD ... width direction, WO ... waist opening, 70 ... sheet junction, XD ... orthogonal direction, ED ... stretching direction, 80 ... .

Claims (9)

The first nonwoven layer and the second nonwoven layer partially or entirely overlapping each other, and the first nonwoven layer and the second nonwoven layer are spaced apart in the orthogonal direction orthogonal to the expansion direction, along the expansion direction And a plurality of elongated elastic members extending
At least both ends of the elastic member in the elastic direction in the elastic region are fixed to the first nonwoven layer and the second nonwoven layer.
The stretchable region includes a sheet bonding portion in which the first non-woven fabric layer and the second non-woven fabric layer are bonded,
At least one of the first non-woven fabric layer and the second non-woven fabric layer is a perforated non-woven fabric in which holes penetrating in the thickness direction are arranged.
In the telescopic structure of the disposable wearing article,
The sheet bonding portion is formed in a stripe pattern spaced apart in the orthogonal direction and substantially continuous in the expansion and contraction direction,
In the arrangement of the holes, rows of the holes arranged at intervals in the orthogonal direction are arranged at intervals in the expansion and contraction direction,
The orthogonal spacing of the holes in the row of holes is less than the spacing in the orthogonal direction of the sheet joints,
A telescopic structure of a disposable wearing article characterized in that. The orthogonal spacing of the holes in the row of holes is at least 1/6 and less than 1⁄2 of the spacing in the orthogonal direction of the sheet bonding portion.
The telescopic structure of the disposable wearing article according to claim 1. The sheet bonding portion is formed of a hot melt adhesive disposed at a portion overlapping with the elastic member.
The expansion-contraction structure of the disposable wearing article according to claim 1 or 2. The diameter of the holes in the perforated non-woven fabric decreases from the opposite side to the opposite non-woven fabric layer side toward the opposite non-woven fabric layer side,
The telescopic structure of the disposable wearing article according to any one of claims 1 to 3. The hole has a dimension of 0.3 to 3.0 mm in the expansion / contraction direction and a dimension of 0.3 to 5.0 mm in the orthogonal direction,
The spacing of the holes in the row in the orthogonal direction is 1.0 to 5.0 mm,
The interval in the expansion and contraction direction of the row is 2.5 to 10.0 mm,
The space | interval of the said sheet | seat junction part in the said orthogonal direction is 5-10 mm,
The dimension of the said sheet | seat junction part in the said orthogonal direction is 0.5-5.0 mm, The expansion-contraction structure of the disposable wearing article of any one of Claims 1-4. The arrangement of the holes in the perforated non-woven fabric is a matrix in which a row of holes linearly arranged at predetermined intervals in the orthogonal direction is repeated at predetermined intervals in the expansion and contraction direction.
The telescopic structure of the disposable wearing article according to any one of claims 1 to 5. Of the first nonwoven layer and the second nonwoven layer, the nonwoven layer on the skin side of the wearer is a non-porous nonwoven, and the opposite nonwoven layer is the perforated nonwoven.
The telescopic structure of the disposable wearing article according to any one of claims 1 to 6. Both the first non-woven fabric layer and the second non-woven fabric layer are the non-porous non-woven fabric, and the holes of one non-porous non-woven fabric do not overlap the holes of the other non-porous non-woven fabric.
The telescopic structure of the disposable wearing article according to any one of claims 1 to 7. An integral exterior body extending from the front to the back, or an exterior provided separately for the front and the back, and an interior extending to the front and back of the crotch attached to the widthwise middle of the exterior. A side seal portion in which both sides of the exterior body in the front body and both sides of the exterior body in the back body are respectively joined, a waist opening, and a pair of left and right leg openings,
The exterior body in at least one of the front body and the back body extends in the width direction corresponding to the space between the side seals in at least a part of the front-rear direction, according to any one of claims 1 to 8. The stretch structure is provided such that the stretch direction of the stretch area is the width direction,
Pants-type disposable wearing article characterized in that.

Images