JP7218170B2 - Disposable wearing article - Google Patents

Description

TECHNICAL FIELD The present invention relates to a disposable wearing article having a portion to which a perforated nonwoven fabric is attached.

2. Description of the Related Art Many disposable wearing articles such as disposable diapers and sanitary napkins use nonwoven fabrics for the outer and inner surfaces of the products in order to make them look and feel like cloth. As the non-woven fabric, non-porous non-woven fabric having holes other than inter-fiber gaps and perforated non-woven fabric having a large number of holes penetrating from the front to the back are used (see Patent Documents 1 to 4).

Perforated nonwoven fabrics are also effective in adding functional beauty to improve breathability and liquid permeability, so it is extremely important to be able to more clearly see the presence of pores (visual effect).

However, since the nonwoven fabric used for disposable wearing articles is thin to some extent, there is a problem that if the pores become small to a certain extent, the pores are assimilated into the surrounding non-porous portion, making it difficult to visually recognize the presence or absence of the pores. In this case, the visual effect is not sufficiently exhibited, and it becomes difficult to correctly convey the function of improving air permeability and liquid permeability to the user.

JP 2015-128573 A Japanese Unexamined Patent Application Publication No. 2002-178428 JP 2009-136504 A JP 2018-51181 A

SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to improve the visibility of holes in a perforated nonwoven fabric exposed to the outside in a disposable wearing article.

A representative aspect of the present invention that solves the above problems is as follows.
<First Aspect>
It has a perforated nonwoven fabric in which a large number of holes penetrating on the front and back are provided at intervals,
The perforated nonwoven fabric has an exposed surface exposed to the outside and a support surface facing another sheet,
Disposable wearing articles,
The perforated nonwoven fabric has a thickness of 0.30 to 1.5 mm,
the minimum dimension of the hole is 0.6 to 5 mm;
The whiteness of the exposed surface of the perforated nonwoven fabric is 70% or more,
A disposable wearing article characterized by:

(Effect)
The inventors of the present invention have studied the visibility of holes in perforated nonwoven fabrics and found that the visibility of the holes is reduced when the whiteness of the exposed surface of the perforated nonwoven fabric is low. Although the reason is not clear, it is considered to be roughly as follows. That is, the visibility of the holes varies depending on the degree of shadows generated on the edges of the holes. The difference between the part and the shading on the edge of the hole is reduced, and the visibility of the hole is reduced. This tendency is particularly noticeable when the thickness of the perforated nonwoven fabric and the minimum dimension of the pores are within the above ranges. Here, when the whiteness of the perforated nonwoven fabric is 70% or more, the whiteness of the portion outside the holes is high, so that the difference between the portion outside the holes and the shadow generated at the edges of the holes becomes large. Even if the layer is thin to some extent and the holes are small to some extent, the holes are easily visible. The present disposable wearing article is based on such findings. It is characterized by improved visibility.

In addition, whiteness means the value measured by "ISO whiteness (diffuse blue light reflectance)" defined in JIS P8148:2001. In particular, when the object to be measured is a perforated nonwoven fabric , a stack of test strips is used in which at least the holes of the uppermost test strip do not overlap with the holes of the adjacent test strip below. Although the standard specifies the sample size, there is no limit to the size of the sample as long as it can be measured by the measuring equipment. When measuring the whiteness of a perforated nonwoven fabric in a product, if a sample of sufficient size for measurement cannot be obtained, a sample can be prepared using the same material and the whiteness can be measured. As a whiteness measuring device, for example, a simple spectroscopic color difference meter NF333 manufactured by Nippon Denshoku Industries Co., Ltd. or a spectroscopic whiteness meter PF-10 can be used. Moreover, the "minimum dimension" of the hole means the dimension in the MD direction or the dimension in the CD direction, whichever is shorter.

<Second Aspect>
The perforated nonwoven fabric is a nonwoven fabric containing a white pigment having a fineness of constituent fibers of 1.8 to 6.0 dtex and a basis weight of 15 to 25 g/m ² .
A disposable wearing article of the first aspect.

(Effect)
Density can be increased to increase the whiteness of the perforated nonwoven fabric, but this not only increases cost but also reduces softness. Therefore, it is preferable that the fineness and basis weight of the perforated nonwoven fabric are within the above ranges, and the lack of whiteness is compensated by containing an appropriate amount of white pigment such as titanium oxide.

<Third Aspect>
A display that can be seen through the exposed surface of the perforated nonwoven fabric is printed on a portion of the perforated nonwoven fabric that overlaps the opposite side of the exposed surface,
The whiteness of the perforated nonwoven fabric is 85% or less,
An articulated disposable wearing article of the first or second aspect.

(Effect)
If the whiteness of the perforated nonwoven fabric is too high, when a display that is visible through the outer surface of the perforated nonwoven fabric is printed on the back side of the perforated nonwoven fabric, the display may become difficult to see. Therefore, the whiteness of the perforated nonwoven fabric is preferably within the above range.

<Fourth Aspect>
In the other sheet, the whiteness of at least the non-colored portion on the surface on the perforated nonwoven fabric side is 70% or more.
A disposable wearing article according to any one of aspects 1 to 3.

(Effect)
The whiteness of the other sheet facing the support surface of the perforated nonwoven fabric is not particularly limited, but the surface of the other sheet on the perforated nonwoven fabric side is the portion exposed through the holes. Therefore, when the whiteness of at least the non-colored portion on the surface of the nonwoven fabric with holes in the other sheet is 70% or more, the portion with high whiteness is exposed to the inside of the holes. The difference between the portion and the shadow generated on the edge of the hole is increased, making the hole even easier to visually recognize.

<Fifth Aspect>
An absorbent article comprising an absorbent body, a breathable liquid-impermeable sheet covering the back side of the absorbent body, and a cover nonwoven fabric covering the back side of the liquid-impermeable sheet,
The cover nonwoven fabric is the perforated nonwoven fabric, and the liquid-impermeable sheet is the other sheet,
A disposable wearing article according to any one of aspects 1 to 4.

(Effect)
In absorbent articles, it is common to cover the back surface of the absorbent body with a breathable, liquid-impermeable sheet and further cover the outer surface with a cover nonwoven fabric to give it a cloth-like appearance, which improves breathability. From the viewpoint, not only the liquid-impermeable sheet but also the air permeability in the thickness direction of the cover nonwoven fabric and the air permeability between the cover nonwoven fabric and the liquid-impermeable sheet are important. In addition, since the cover nonwoven fabric is exposed on the outer surface of the product, its good appearance appeals to consumers the functional beauty of the product. Therefore, it is preferable to apply the perforated nonwoven fabric having the aforementioned whiteness to such a cover nonwoven fabric.

<Sixth Aspect>
The holes are arranged so that rows of holes spaced in one of the front-rear direction and width direction are spaced in the other direction,
the distance between the holes in the one direction is 1.0 to 5.0 mm;
the interval in the other direction is 2.5 to 10.0 mm;
A disposable wearing article according to any one of aspects 1 to 5.

(Effect)
The arrangement of the holes in the perforated nonwoven fabric is not particularly limited, but when the holes are arranged in a fine and regular pattern as in this embodiment, the visibility of the holes is particularly important. Therefore, in the arrangement of holes as in this embodiment, it is preferable that the nonwoven fabric has the above-described degree of whiteness and the like of the perforated nonwoven fabric .

<Seventh Aspect>
The holes are arranged so that a group of holes arranged in a single wave shape or a chain shape continuing in one of the front-rear direction and the width direction are spaced apart in the other direction,
The arrangement of the holes is such that rows of holes spaced apart in the other direction are spaced in the one direction,
the interval in the other direction of the holes in the row of holes is 1.0 to 5.0 mm;
the spacing of the holes in the group of holes in the one direction is 2.5 to 10.0 mm;
A disposable wearing article according to any one of aspects 1 to 5.

(Effect)
Although the arrangement of the holes in the perforated nonwoven fabric is not particularly limited, the visibility of the holes is particularly important when the holes are arranged in a fine and aesthetically regular pattern as in this embodiment. Therefore, in the arrangement of holes as in this embodiment, it is preferable that the nonwoven fabric has the above-described degree of whiteness and the like of the perforated nonwoven fabric .

ADVANTAGE OF THE INVENTION According to this invention, the visibility of the hole of the perforated nonwoven fabric exposed outside in a disposable wearing article is improved, etc. is brought about.

Fig. 2 is a plan view showing the inner surface of the underpants-type disposable diaper in an unfolded state; Fig. 2 is a plan view showing the outer surface of the pants-type disposable diaper in an unfolded state; FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1; 3 is a cross-sectional view taken along line 3-3 of FIG. 1; FIG. (a) 4-4 cross-sectional view of FIG. 1, and (b) 5-5 cross-sectional view of FIG. 1 is a perspective view (with holes omitted) of a pants-type disposable diaper. FIG. FIG. 4 is a plan view showing the outer surface of the inner body in the unfolded state; FIG. 4 is a plan view showing the outer surface of the inner body in the unfolded state together with the outline of the outer body; Fig. 2 is a plan view showing the outer surface of the pants-type disposable diaper in an unfolded state; (a) 4-4 cross-sectional view of FIG. 9, and (b) 5-5 cross-sectional view of FIG. It is (a) (c) sectional drawing, (b) (d) top view of the adhesion|attachment part of a cover nonwoven fabric. FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 1, showing another form; FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 1, showing another form; Fig. 2 is a plan view showing the outer surface of the pants-type disposable diaper in an unfolded state; (a) 4-4 cross-sectional view of FIG. 14, and (b) 5-5 cross-sectional view of FIG. Fig. 2 is a plan view showing the inner surface of the tape-type disposable diaper in an unfolded state; Fig. 2 is a plan view showing the outer surface of the tape-type disposable diaper in an unfolded state; FIG. 17 is a cross-sectional view taken along line 6-6 of FIG. 16; 17 is a cross-sectional view taken along line 7-7 of FIG. 16; FIG. 16 (a) 8-8 cross-sectional view of FIG. 16, (b) 9-9 cross-sectional view of FIG. 16, and (c) 10-10 cross-sectional view of FIG. FIG. 4 is an enlarged plan view of a main part showing various patterns of holes in a perforated nonwoven fabric; FIG. 4 is an enlarged plan view of a main part showing various patterns of holes in a perforated nonwoven fabric; FIG. 4 is an enlarged plan view of a main part showing a chain-like pattern of holes in a perforated nonwoven fabric; It is various cross-sectional views of the perforated nonwoven fabric.

Examples of disposable wearing articles will be described in detail below with reference to the accompanying drawings. The dotted pattern portion in the cross-sectional view shows the adhesive as a joining means for joining each component located on the front side and the back side, and the hot melt adhesive solid, bead, curtain, summit or spiral coating, or pattern coating (transfer of hot-melt adhesive by letterpress method), etc. Alternatively, or together with this, the fixed portion of the elastic member is formed by coating the outer peripheral surface of the elastic member with a comb gun or Surewrap coating. be. Hot-melt adhesives include, for example, EVA-based, adhesive rubber-based (elastomer-based), olefin-based, and polyester-polyamide-based adhesives, and can be used without particular limitation. As a joining means for joining each constituent member, a means by material welding such as heat sealing or ultrasonic sealing can be used.

In addition, as the nonwoven fabric in the following description, a known nonwoven fabric can be appropriately used depending on the site and purpose. Constituent fibers of non-woven fabrics include, for example, synthetic fibers such as olefin-based, polyester-based, and polyamide-based fibers such as polyethylene or polypropylene (including composite fibers such as core-sheath fibers in addition to single-component fibers), as well as recycled rayon and cupra. Fibers, natural fibers such as cotton, etc., can be selected without particular limitation, and these can also be mixed and used. In order to increase the softness of the nonwoven fabric, it is preferable to use crimped fibers as the constituent fibers. In addition, even if the constituent fibers of the nonwoven fabric are hydrophilic fibers (including those made hydrophilic by a hydrophilic agent), they may be hydrophobic fibers or water-repellent fibers (water-repellent fibers made water-repellent by a water-repellent agent). including). In addition, nonwoven fabrics are generally classified into short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bonded (air-through) nonwoven fabrics, and needle punched nonwoven fabrics, depending on the fiber length, sheet forming method, fiber bonding method, and laminate structure. Non-woven fabrics, point-bonded non-woven fabrics, laminated non-woven fabrics (including SSS non-woven fabrics in which the same or similar non-woven fabric layers are laminated, SMS non-woven fabrics in which different non-woven fabric layers are laminated, in which a meltblown layer is sandwiched between spunbond layers, SMMS non-woven fabrics, etc.), etc. However, any of these nonwoven fabrics can be used.

<Example of pants-type disposable diaper>
1 to 6 show pants-type disposable diapers. This pants-type disposable diaper includes a front outer body 12F forming a front body F, a rear outer body 12B forming a back body B, and a rear outer body 12B extending from the front outer body 12F through the crotch to the rear outer body 12B. and an interior body 200 provided inside the exterior bodies 12F and 12B, and both sides of the front exterior body 12F and both sides of the rear exterior body 12B are joined to form a side seal portion 12A. As a result, the opening formed by the front and rear ends of the exterior bodies 12F and 12B becomes a waist opening WO through which the wearer's torso passes, and the lower edges of the exterior bodies 12F and 12B and the interior body 200 on both sides in the width direction of the interior body 200. The portions surrounded by the side edges are leg openings LO through which the legs are passed. The inner body 200 is a part that absorbs and holds excrement such as urine, and the outer bodies 12F and 12B are parts that support the inner body 200 against the wearer's body. Symbol Y indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and the symbol X indicates the diaper in the unfolded state. shows the full width of

Further, the pants-type disposable diaper of this example forms a waist region T defined as a front-rear direction range (a front-rear direction range from the waist opening WO to the upper ends of the leg openings LO) having the side seal portions 12A, and the leg openings LO. It has an intermediate region L defined as a front-back direction range of the part (between the front-back direction region having the side seal portions 12A of the front body F and the front-back direction region having the side seal portions 12A of the back body B). The waist region T can be divided into a “waist portion” W conceptually forming the edge of the waist opening and a “lower waist portion” U below this. Usually, when there is a boundary where the elastic stress in the width direction WD changes in the waist region T (for example, the thickness or elongation rate of the elastic member changes), the waist opening WO side is the waist opening WO side of the boundary closest to the waist opening WO side. If there is no such boundary, the waist portion W is on the waist opening WO side of the absorber 56 or the inner body 200 . The length in the front-rear direction differs 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 lower waist portion U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are constricted in a U-shape or curvilinear shape along the circumference of the wearer's leg, and this is a portion into which the wearer's leg is inserted. As a result, the unfolded pants-type disposable diaper has a substantially hourglass shape as a whole.

(internal and external joints)
Fixing of the inner body 200 to the outer bodies 12F and 12B can be performed by means of material welding such as heat sealing or ultrasonic sealing, or hot melt adhesive. In the illustrated embodiment, the hot-melt adhesive 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 side gathers 60 in this case, is applied to the inner surfaces of the outer bodies 12F and 12B. fixed against. The inner/outer joints 201 for fixing the inner body 200 and the outer bodies 12F and 12B can be provided almost entirely in the region where the two overlap. can.

(inner body)
The inner body 200 can take any shape, but in the illustrated form it is rectangular. As shown in FIGS. 3 to 5, the inner body 200 comprises a body-side top sheet 30, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. This is the main body part responsible for the absorption function. Reference numeral 40 denotes an intermediate sheet provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid permeating the top sheet 30 to the absorbent element 50, and reference numeral 60 denotes an inner body. Side gathers 60 extending from both sides of the inner body 200 around the legs of the wearer are shown to prevent excrement from leaking to both sides of the body 200 .

(top sheet)
The top sheet 30 has the property of being permeable to liquid, and examples thereof include perforated or non-perforated non-woven fabrics and porous plastic sheets.

Both sides of the top sheet 30 may be folded back at the side edges of the absorbent element 50 , or may protrude laterally from the side edges of the absorbent element 50 without being folded.

The top sheet 30 can be fixed to a member adjacent to the back side by means of material welding, such as heat sealing or ultrasonic sealing, or hot-melt adhesive for the purpose of preventing misalignment with respect to the member on the back side. desirable. In the illustrated embodiment, 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 absorbent body 56 with a hot-melt adhesive applied to its back surface.

(intermediate sheet)
An intermediate sheet (also called a “second sheet”) 40 having a faster liquid permeation rate than the top sheet 30 can be provided in order to quickly transfer the liquid that has permeated the top sheet 30 to the absorbent body. The intermediate sheet 40 not only transfers the liquid to the absorbent body quickly to improve the absorption performance of the absorbent body, but also prevents the absorbed liquid from returning from the absorbent body to keep the top sheet 30 dry at all times. can be in a state of The intermediate sheet 40 can also be omitted.

Examples of the intermediate sheet 40 include materials similar to those of the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, pointbond nonwoven fabric, and crepe paper. In particular, an air-through nonwoven fabric is preferred because it is bulky. Composite fibers having a core-sheath structure are preferably used for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. The basis weight is preferably 20-80 g/m ² , more preferably 25-60 g/m ² . The thickness of the raw fibers of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the non-woven fabric bulky, it is also preferable to use eccentric fibers, hollow fibers, or eccentric and hollow fibers whose core is not in the center as mixed fibers of all or part of the raw material fibers.

The intermediate sheet 40 in the illustrated form is shorter than the width of the absorbent body 56 and arranged 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 entire length of the diaper, the length of the absorbent element 50, or within a short length range centered on the liquid-receiving area.

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

(liquid-impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but examples thereof include plastic films made of olefin resins such as polyethylene and polypropylene, laminated nonwoven fabrics in which a plastic film is provided on the surface of nonwoven fabrics, and plastic films. A laminated sheet in which a nonwoven fabric or the like is laminated and joined to the sheet can be exemplified. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impermeable and moisture-permeable material that is preferably used from the viewpoint of preventing stuffiness. Moisture-permeable plastic films include microporous plastic films obtained by kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching the sheet in a uniaxial or biaxial direction. is widely used. Other methods include non-woven fabrics using microdenier fibers, leak-proof enhancement by reducing fiber voids by applying heat and pressure, and coating with superabsorbent or hydrophobic resins or water repellents. Therefore, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11 .

The liquid-impermeable sheet 11 has a width that can be accommodated on the back side of the absorbent element 50 as shown in the figure. It can also extend to both sides. It is appropriate that the width of this extended portion is about 5 to 20 mm on each side.

(side gather)
The side gathers 60 extend along both sides of the inner body 200 over the entire length of the front-rear direction LD, and are provided in contact with the wearer's legs to prevent side leakage. This includes what is called a gather and what is called a planar gather.

The side gathers 60 of the first structure shown in FIGS. 3 and 4 are so-called three-dimensional gathers, and stand up from the sides of the inner body 200 to the front side. The side gathers 60 are formed so that the root side portion stands obliquely toward the center in the width direction, and the tip portion of the side gathers 60 stands obliquely toward the outside in the width direction from the middle portion, but is limited to this. However, it is possible to make appropriate modifications such as a configuration in which the entire body is erected on the center side in the width direction.

More specifically, the side gathers 60 of the first structure are formed by folding a band-shaped gathered nonwoven fabric 62 having a length equal to the length of the inner body 200 in the front-rear direction in the width direction WD at the leading end. It is folded in half, and a plurality of elongated gather elastic members 63 are fixed in a stretched state along the longitudinal direction at intervals in the width direction WD between the folded portion and the sheet in the vicinity thereof. . The base end portion of the side gathers 60 located on the opposite side to the tip end portion (the end portion on the side opposite to the sheet folded portion in the width direction WD) is located on the side portion of the inner body 200 on the back side of the liquid-impermeable sheet 11 . A fixed root portion 65 is formed, and the portion other than the root portion 65 is a main body portion 66 extending from the root portion 65 (portion on the folded portion side). Further, the main body portion 66 is composed of a root side portion toward the center in the width direction and a tip side portion folded back from the tip of the root side portion to the outside in the width direction. Although this form is a surface contact type side gather 60, a line contact type side gather 60 that is not folded outward in the width direction can also be employed. Both ends of the main body portion 66 in the front-rear direction are laid down portions 67 fixed to the side surfaces of the top sheet 30 in the laid-down state, while an intermediate portion in the front-rear direction positioned therebetween is not fixed. A gathered elastic member 63 extending in the front-rear direction LD is fixed to the free portion 68 in a stretched state.

As the gathered nonwoven fabric 62, nonwoven fabric such as spunbond nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), meltblown nonwoven fabric, etc., which is flexible and excellent in uniformity and concealability, is water-repellent with silicone or the like as necessary. A treated material can be preferably used, and the fiber areal weight is preferably about 10 to 30 g/m ² . A thread rubber or the like can be used as the gather elastic member 63 . When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate when fixed is preferably 150 to 350%, more preferably 200 to 300%. Also, as shown in the figure, a waterproof film 64 can be interposed between the gathered nonwoven fabrics 62 folded in two. In this case, the gathered nonwoven fabrics 62 can be partially omitted where the waterproof film 64 exists. However, in order to make the product look and feel like cloth, it is necessary that at least the outer surface of the side gathers 60 from the base end to the tip be formed of the gathered nonwoven fabric 62 as in the illustrated embodiment. is.

The number of gather elastic members 63 provided in the free portion of the side gathers 60 is preferably 2-6, more preferably 3-5. A suitable arrangement interval 60d is 3 to 10 mm. With this configuration, the area in which the gather elastic member 63 is arranged can easily come into contact with the skin. The gather elastic member 63 may be arranged not only on the tip side but also on the base side.

In the free portion 68 of the side gathers 60, hot-melt adhesives and heat seals by various coating methods, ultra-thin adhesives, and ultra-thin adhesives are used to bond the inner and outer layers of the gathered nonwoven fabric 62 and to fix the gathered elastic member 63 sandwiched therebetween. At least one of fixing means by material welding such as sound wave seal can be used. If the inner layer and the outer layer of the gathered nonwoven fabric 62 are entirely adhered together, the flexibility is impaired, so it is preferable that the portions of the gathered elastic member 63 other than the adhered portion are not adhered or adhered weakly. In the illustrated embodiment, a hot-melt adhesive is applied only to the outer peripheral surface of the gathered elastic member 63 by an application means such as a comb gun or a sure wrap nozzle, and the gathered elastic member 63 is sandwiched between the inner layer and the outer layer of the gathered nonwoven fabric 62 . The gathered elastic member 63 is fixed to the inner layer and the outer layer of the gathered nonwoven fabric 62, and the inner layer and the outer layer of the gathered nonwoven fabric 62 are fixed only by the hot-melt adhesive applied to the outer peripheral surface of the. there is

In addition, for fixing the waterproof film 64 incorporated in the side gathers 60 and the gathered nonwoven fabric 62, and fixing the lodged portion 67 to the side surface of the inner body 200, hot melt adhesives and heat seals by various coating methods are used. At least one of material welding means such as ultrasonic sealing and the like can be used. In the illustrated embodiment, a slot application of hot melt adhesive is used to secure the waterproof film 64 . Further, the lodged portion 67 in the illustrated form is fixed by a combination of hot-melt adhesive and material welding, but it is also possible to fix these by using only one of them.

The base portion 65 of the side gathers 60 can be fixed to an appropriate member such as the top sheet 30, the liquid impermeable sheet 11, the absorbent element 50, etc. of the inner body 200. FIG.

In the side gathers 60 having the first structure configured as described above, the contractile force of the gather elastic members 63 acts to bring the front and rear ends closer together, but the front and rear ends of the main body portion 66 do not stand up. However, since there is a non-fixed free portion between them, only the free portion stands up so as to abut on the body side as shown in FIG. In particular, when the root portion 65 is positioned on the back side of the inner body 200, the side gathers 60 stand up so as to open outward in the width direction in the crotch portion and its vicinity, so that the side gathers 60 are flat around the legs. They come into contact with each other, improving the fit.

The dimensions of the side gathers 60 of the first structure can be determined as appropriate. The width direction length) W6 is preferably 15 to 60 mm, particularly preferably 20 to 40 mm. When the side gathers 60 are folded flat so as to be parallel to the surface of the top sheet 30, the distance W3 between the innermost creases is preferably 60 to 190 mm, particularly preferably 70 to 140 mm.

The side gathers 60 of the first configuration are intended to include only solid gathers, but may include both solid and planar gathers, or may include planar gathers only. Figures 12 and 13 show a second construction of side gathers 60, including both solid gathers and planar gathers. Each of the side gathers 60 has a first portion 61 (flat gather portion) protruding laterally of the interior body 200 from a root portion 65 fixed to the side of the interior body 200 on the back side of the liquid-impermeable sheet 11 . and a second portion 69 (three-dimensional gathered portion) protruding from the base portion 65 fixed to both sides of the top sheet 30 of the inner body 200 toward the front side of the inner body 200 . More specifically, a band-shaped gathered nonwoven fabric 62 having a length equal to the length of the inner body 200 in the front-rear direction extends laterally from the root portion 65 and is folded back to the front side at the tip of the first portion 61 . The portion folded back to the front side reaches the second portion 69 via the first portion 61 and is folded back at the tip of the second portion 69 . The folded portions of the gathered nonwoven fabric 62 are joined at opposing portions with a hot-melt adhesive or the like. Both ends of the second portion 69 in the front-rear direction are laid down portions 67 fixed to the side surfaces of the top sheet 30 in the laid-down state, while an intermediate portion in the front-rear direction located therebetween is A non-fixed free portion 68 is provided. At least the middle portion in the front-rear direction of the first portion 61 and the free portion 68 of the second portion 69 are provided with one gather elastic member 63 along the front-rear direction LD or a plurality of gathered elastic members 63 at intervals in the width direction WD in an extended state. The contraction force causes the free portion 68 of the second portion 69 to contract in the front-rear direction LD to form a three-dimensional gather in contact with the circumference of the leg. It becomes a planar gather that touches the surroundings.

Other points regarding the second structure, such as the material of the gathered nonwoven fabric 62 and the material of the gathered elastic member 63, are the same as those of the first structure, so description thereof will be omitted.

(absorbing element)
The absorbent element 50 has an absorbent body 56 and a wrapping sheet 58 that wraps the entire absorbent body 56 . The packaging sheet 58 can also be omitted.

(Absorber)
Absorbent body 56 can be formed from an aggregate of fibers. The filament assembly may be a filament assembly obtained by laminating short fibers such as cotton pulp or synthetic fibers, or by opening tows (fiber bundles) of synthetic fibers such as cellulose acetate as necessary. can also be used. The fiber basis weight can be, for example, about 100 to 300 g/m ² when piling up cotton-like pulp or short fibers, and for example, about 30 to 120 g/m ² for filament aggregates. can be done.

The absorbent body 56 may have a rectangular shape, but as shown in FIGS. 1 and 7, it has a front end, a rear end, and a constricted portion 56N positioned therebetween and narrower than the front end and the rear end. is preferably formed in an hourglass shape, because the absorber 56 itself and the side gathers 60 can better fit around the legs.

(superabsorbent polymer particles)
Absorbent body 56 may contain superabsorbent polymer particles in part or in its entirety. Superabsorbent polymer particles include "powder" in addition to "particles". As the superabsorbent polymer particles, those used for this type of disposable diaper can be used as they are.

(packaging sheet)
When the packaging sheet 58 is used, tissue paper, particularly crepe paper, non-woven fabric, poly-laminated non-woven fabric, a perforated sheet, or the like can be used as the material. However, it is desirable that the sheet is such that the superabsorbent polymer particles do not escape. When non-woven fabric is used instead of crepe paper, hydrophilic SMS non-woven fabric (SMS, SSMMS, etc.) is particularly suitable, and its material can be polypropylene, polyethylene/polypropylene composite, or the like. The basis weight is preferably 5 to 40 g/m ² , particularly 10 to 30 g/m ² .

(Exterior body)
The exterior bodies 12F and 12B are composed of a front exterior body 12F that constitutes the front body F and a rear exterior body 12B that constitutes the back body B. The front exterior body 12F and the rear exterior body 12B are not continuous on the crotch side and are spaced apart in the front-rear direction LD (exterior split type). This separation distance 12d can be, for example, approximately 150 to 250 mm. Further, as shown in FIGS. 14 and 15, the outer body 12 may be an integral body extending from the front body F to the back body B through the crotch (exterior integrated type).

The outer bodies 12F and 12B have a waist portion corresponding to the waist region T in the front-rear direction. In this embodiment, the front exterior body 12F does not have a portion corresponding to the intermediate region L, but the rear exterior body 12B has a buttock cover portion C extending from the waist region T toward the intermediate region L side. are doing. Although not shown, the front exterior body 12F may also be provided with an inguinal cover portion extending from the waist region T toward the intermediate region L side, or may be provided with an inguinal cover portion but not with a buttock cover portion. It is not necessary to provide a portion corresponding to the intermediate region L on both sides of the rear exterior body 12B. In the illustrated embodiment, the lower edge of the buttock cover portion C is formed in a straight line along the width direction WD, like the lower edge of the front exterior body 12F. It can also be a curve that

As shown in FIGS. 4 and 5, the exterior bodies 12F and 12B are formed by joining an outer sheet layer 12S and an inner sheet layer 12H by joining means such as hot-melt adhesive or welding. The sheet material forming the outer sheet layer 12S and the sheet material forming the inner sheet layer 12H may be a common sheet material as shown in FIG. 5, or may be separate sheet materials. That is, in the former case, the inner sheet layer 12H and the outer sheet layer 12S are respectively formed by the inner portion and the outer portion of the single sheet material folded back at the edge of the waist opening WO (which may be the edge on the crotch side). be done. The former mode has the advantage that the number of sheet materials is small, and the latter mode has the advantage that the inner sheet layer 12H and the outer sheet layer 12S are less likely to be misaligned when they are bonded together.

The sheet material used for the outer sheet layer 12S and the inner sheet layer 12H is not particularly limited, but non ^- woven fabric is preferable.

(stretchable area/non-stretchable area)
The exterior bodies 12F and 12B are provided with elongated elastic members 15 to 19 such as rubber thread between the outer sheet layer 12S and the inner sheet layer 12H in order to improve fit around the wearer's waist. An expansion/contraction region is formed that elastically expands and contracts in the width direction WD with expansion and contraction of . In this stretchable region, the outer sheet layer 12S and the inner sheet layer 12H shrink with the contraction of the elastic member in the natural length state, forming wrinkles or folds. The layer 12S and the inner sheet layer 12H can be stretched to a predetermined elongation rate at which they are completely stretched without wrinkles. As the elastic members 15 to 19, either synthetic rubber or natural rubber may be used.

For bonding the outer sheet layer 12S and the inner sheet layer 12H in the exterior bodies 12F and 12B and fixing the elastic members 15 to 19 sandwiched between them, hot-melt adhesives, heat sealing, and ultrasonic sealing by various coating methods are used. At least one of fixing means by material welding such as welding can be used. If the entire surfaces of the exterior bodies 12F and 12B are firmly fixed, the flexibility is impaired, so it is preferable that the elastic members 15 to 19 are not adhered or adhered weakly except for the adhered portions. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surfaces of the elastic members 15 to 19 by applying means such as a comb gun or a sure wrap nozzle, and the elastic members 15 to 19 are sandwiched between the sheet layers 12S and 12H. The elastic members 15 to 19 are fixed to the sheet layers 12S and 12H and fixed between the sheet layers 12S and 12H only by the hot-melt adhesive applied to the outer peripheral surface of the sheet layers 12S and 12H. The elastic members 15 to 19 can be fixed to the outer sheet layer 12S and the inner sheet layer 12H only at both ends of the elastic region in the elastic direction.

More specifically, a plurality of waist elastic members 17 extend vertically between the outer sheet layer 12S and the inner sheet layer 12H in the waist portion W of the exterior bodies 12F and 12B so as to be continuous over the entire width direction WD. installed with a gap. One or more of the waist elastic members 17 disposed in the region adjacent to the lower waist portion U may overlap the inner body 200 or may overlap the inner body 200 in the width direction. Except for the part, it may be provided on both sides in the width direction. The waist elastic member 17 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 1.5 mm 2 . 0 mm ² ) are preferably provided at intervals of 4 to 12 mm, and the elongation rate of the waist portion W in the width direction WD is 150 to 400%, particularly about 220 to 320%. It is preferable to have In addition, the waist portion W does not need to use the waist portion elastic member 17 having the same thickness or the same elongation rate in all of the waist portion W in the front-rear direction LD. The thickness and elongation rate may be different.

Further, a plurality of waist lower elastic members 15 and 19 made of elongated elastic members are vertically spaced apart between the outer sheet layer 12S and the inner sheet layer 12H in the lower waist portion U of the outer bodies 12F and 12B. It is installed with a gap.

The lower waist elastic members 15 and 19 have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex ⁽ for synthetic rubber. 1.0 mm ² ) are preferably provided at intervals of 1 to 15 mm, particularly 3 to 8 mm, at intervals of 5 to 30, and the elongation rate of the lower waist portion U in the width direction WD is 200 to 350%. , particularly preferably about 240 to 300%.

In addition, a plurality of cover section elastic members 16 made of elongated elastic members are attached at intervals in the vertical direction between the outer sheet layer 12S and the inner sheet layer 12H in the buttock cover section C of the rear exterior body 12B. It is

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

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

When the elastic members 15, 16, 19 are provided in the front-back direction range having the absorber 56 as in the illustrated embodiment of the waist lower part U and the buttocks cover part C, part or all of the elastic members 15, 16, 19 extend in the width direction of the absorber 56. In order to prevent contraction of the WD, the middle portion in the width direction (preferably including the entire inner/outer joint portion 201) including part or all of the portion overlapping the absorbent body 56 in the width direction WD is defined as the non-stretchable region A1. Both sides in the width direction are elastic regions A2. Although it is preferable that the waist portion W is the stretchable region A2 over the entire width direction WD, a non-stretchable region A1 may be provided in the middle of the widthwise direction similarly to the lower waist portion U.

The stretchable area A2 and the non-stretchable area A1 supply the elastic members 15 to 17, 19 between the inner sheet layer 12H and the outer sheet layer 12S, and the elastic members 15, 16, 19 are at least stretchable in the stretchable area A2. The elastic members 15, 16, and 19 are fixed at both ends in the direction via a hot-melt adhesive, and are not fixed in the non-stretchable region A1. Alternatively, almost all of the elastic members 15, 16, 19 are finely cut by pressurization and heating, and the elasticity is eliminated in the non-stretchable region A1 while leaving the stretchable region A2. It can be constructed by In the former case, as shown in FIG. 4 , in the non-stretchable region A1, the uncut portion of the elastic members 15, 16, and 19 continuing from the elastic members 15, 16, and 19 of the stretchable region A2 is shrunk to its natural length as the unnecessary elastic member 18. It will remain between the outer sheet layer 12S and the inner sheet layer 12H. In the latter case, although not shown, the remaining cut portions continuing from the elastic members 15, 16, 19 of the elastic regions A2 and the elastic members 15 of both elastic regions A2 , 16, 19 and the cut piece of the elastic member that is not continuous with the outer sheet layer 12S and the inner sheet layer 12H remains as an unnecessary elastic member alone in a state of being contracted to its natural length.

In a pants-type disposable diaper with an exterior that is divided into two parts, the interior body 200 is exposed between the front exterior body 12F and the rear exterior body 12B. A cover nonwoven fabric 20 covering the back surface of the inner body 200 is provided from between the front outer body 12F and the inner body 200 to between the rear outer body 12B and the inner body 200. - 特許庁7 and 8, when the outer sheet layer 12S of the outer body 12 is a non-woven fabric, the outer sheet layer 12S is continuous from the front body F to the back body B through the crotch and the inner body 200. It becomes the cover nonwoven fabric 20 that covers the liquid-impermeable sheet 11 . The basis weight and thickness of the cover nonwoven fabric 20 can be appropriately determined, but in general, it is preferable that the basis weight is 15 to 30 g/m ² and the thickness is 0.2 to 1.2 mm.

The range in the front-rear direction of the cover nonwoven 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, as shown in FIGS. Alternatively, it may extend in the front-rear direction LD from the front end to the rear end of the interior body 200, and as shown in FIG. It may extend in the front-rear direction LD from the rear exterior body 12B to the middle position in the front-rear direction of the region where the rear exterior body 12B and the interior body 200 overlap. In the latter case, the longitudinal length 20y of the overlapping portion between the cover nonwoven fabric 20 and the front exterior body 12F and the longitudinal length 20y of the overlapping portion between the cover nonwoven fabric 20 and the rear exterior body 12B can be determined as appropriate. , and in a normal case, each can be about 5 to 40 mm.

The widthwise range of the cover nonwoven fabric 20 is a range capable of hiding the rear surface exposed portion of the liquid-impermeable sheet 11 . For this reason, in the illustrated embodiment, since the liquid-impermeable sheet 11 is exposed between the base ends of the left and right side gathers 60, at least one of the side gathers 60 is pulled from the back side of the base end of the other side gather 60. A cover nonwoven fabric 20 is provided so as to cover the width direction range to the back side of the base end of the. As a result, the liquid-impermeable sheet 11 can be concealed by the cover nonwoven fabric 20 and the gathered nonwoven fabric 62 of the side gathers 60, and when viewed from the outside, the holes 14 at both ends in the width direction of the cover nonwoven fabric 20 are covered by the gathered nonwoven fabric 62. It becomes something that can not be hidden with. Also, instead of covering the back sides of the base ends of the side gathers 60 with the widthwise ends of the cover nonwoven fabric 20, the gathers nonwoven fabric 62 may cover the backsides of the widthwise both ends of the cover nonwoven fabric 20. 20 and the gathered nonwoven fabric 62 can hide the liquid-impermeable sheet 11. In that case, if the total light transmittance of the gathered nonwoven fabric 62 is 60 to 90%, the gathered nonwoven fabric 62 covers the cover nonwoven fabric 20. Since the holes 14 of the perforated nonwoven fabric can be fully seen through even in the hidden part, it can be recognized that the part having the function of improving breathability extends to the side gathers 60, and the visual effect of the holes 14 is sufficient. It will be demonstrated in

<Example of tape-type disposable diaper>
16 to 20 show an example of a tape-type disposable diaper, where X in the figures indicates the total width of the diaper excluding the fastening tape, and Y indicates the total length of the diaper. This tape-type disposable diaper comprises an absorbent body 56 extending from the abdomen side to the back side, a liquid-permeable top sheet 30 covering the front side of the absorbent body 56, and a liquid-impermeable sheet 11 covering the back side of the absorbent body 56. The end flap portion EF, which is a portion extending to the front side and the rear side of the absorber 56 and does not have the absorber 56, and the side edge of the absorber 56. It has a pair of side flap portions SF extending outward. A constriction along the circumference of the leg is formed in the middle of the side flap portion SF in the front-rear direction, and a fastening tape 13 is provided on the dorsal side of the constriction portion.

The rear surface of the liquid impermeable sheet 11 is covered with a cover nonwoven fabric 20 . The basis weight and thickness of the cover nonwoven fabric 20 can be appropriately determined, but in general, it is preferable that the basis weight is 15 to 30 g/m ² and the thickness is 0.2 to 1.2 mm. The cover nonwoven fabric 20 extends to the periphery of the diaper, the liquid-impermeable sheet 11 extends to the front and rear edges of the diaper in the front-rear direction, and extends to the side edges of the absorber and the outer sheet in the width direction. However, the cover nonwoven fabric 20 can be only part in the front-rear direction, only part in the width direction, or both, if necessary. For example, when a portion of the liquid-impermeable sheet 11 is covered with another material such as a gathered nonwoven fabric, the cover nonwoven fabric 20 may not be provided for that portion.

The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, and have dimensions slightly larger in the front-rear direction and width direction than the absorbent elements 50, and protrude from the side edges of the absorbent elements 50 in the top sheet 30. The peripheral edge portion of the liquid-impermeable sheet 11 and the peripheral edge portion of the liquid-impermeable sheet 11 protruding from the side edge of the absorbent element 50 are joined with a hot-melt adhesive or the like.

In addition, as in the case of pants-type disposable diapers, the absorbent body 56 can be interposed between the top sheet and the liquid-impermeable sheet as an absorbent element wrapped in a wrapping sheet, and an intermediate sheet can be provided between the top sheet and the absorbent element. A seat 40 may be provided. The intermediate sheet 40 in the illustrated form is shorter than the width of the absorbent element 50 and centrally located, but may be provided over the entire width. The longitudinal length of the intermediate sheet 40 may be the same as the entire length of the diaper, the length of the absorbent element 50, or within a short length range centered on the liquid-receiving area. Furthermore, as in the case of pants-type disposable diapers, a color-changing indicator may be provided that comes into contact with the liquid content of the excrement.

Side gathers 60 are provided on both sides in the width direction of the surface of the tape-type disposable diaper. Each side gather 60 includes a first portion 61 (planar gather portion) provided in each side flap portion SF and a second portion 69 (three-dimensional gather portion) protruding from both sides of the top sheet 30. includes. More specifically, a band-shaped gathered nonwoven fabric 62 having a length equal to the total length Y of the diaper extends from the first portion 61 to the second portion 69, and the gathered nonwoven fabric 62 covers the first portion 61. It is joined to the nonwoven fabric 20 with a hot-melt adhesive or the like, and between these nonwoven fabrics, one or more gathered elastic members 63 along the front-rear direction LD are fixed in a stretched state at intervals in the width direction WD, Due to the contraction force, the first portion 61 contracts in the front-rear direction LD to form a planar gather in contact with the circumference of the leg. The gathered nonwoven fabric 62 has an extension portion extending from the first portion 61 as a root portion toward the center in the width direction WD. It is Both ends of the extending portion in the front-rear direction LD are laid down portions 67 fixed to the top sheet 30, while an intermediate portion in the front-rear direction LD located between them is a free portion 68 which is not fixed. One gather elastic member 63 along the front-rear direction LD or a plurality of gathered elastic members 63 are fixed to the free portion 68 at intervals in the width direction WD in a stretched state. is contracted in the front-rear direction LD to form a three-dimensional gather that touches the circumference of the leg.

The fastening tape 13 in the illustrated embodiment includes a tape attachment portion 13C fixed to the side portion of the diaper, a sheet base material forming a tape body portion 13B projecting from the tape attachment portion 13C, and a tape body portion 13B on the sheet base material. A latching portion 13A for the ventral side is provided at an intermediate portion in the width direction, and the front end side of the latching portion 13A serves as a knob portion. The tape attachment portion 13C of the fastening tape 13 is sandwiched between the gathering nonwoven fabric 62 forming the inner layer of the side flap portion and the cover nonwoven fabric 20 forming the outer layer, and is adhered to both nonwoven fabrics 62, 20 with a hot-melt adhesive. . Also, the engaging portion 13A is joined to the inner surface of the tape body portion 13B with an adhesive.

A hook member (male member) of a mechanical fastener (surface fastener) is suitable for the locking portion 13A. The hook material has a large number of engaging projections on its outer surface side. The shapes of the engaging protrusions are (A) L-shaped, (B) J-shaped, (C) mushroom-shaped, (D) T-shaped, and (E) double J-shaped (J-shaped). , but any shape may be used. Of course, an adhesive layer can also be provided as a locking portion of the fastening tape 13 .

Further, as the sheet base material forming the tape attachment portion 13C to the tape body portion 13B, nonwoven fabric, plastic film, poly-laminated nonwoven fabric, paper, or a composite material thereof can be used.

When the diaper is put on, the fastening tape 13 is fixed at a suitable position on the outer surface of the abdomen while the side flaps SF on the back side are superimposed on the outside of the side flaps SF on the abdomen. The position and dimensions of the locking portion of the fastening tape 13 can be determined arbitrarily.

A target sheet 24 having a target for facilitating the fastening is preferably provided at the fastening portion of the fastening tape 13 on the ventral side. When the engaging portion 13A is made of a hook material, the target sheet 24 is a film-type target sheet having a film layer and an engaging layer provided on the entire outer surface thereof, with which the hooks of the engaging portion 13A are detachably engaged. can be preferably used. In this case, the engaging layer may be a net-like body woven with threads and having loops attached to the film layer, or a nonwoven fabric layer of thermoplastic resin may be intermittently sealed by ultrasonic sealing. A form in which the fibers of the non-woven fabric are attached to the film layer and form loops is known, but any of them can be suitably used. A filmless type target tape having no film layer, which is obtained by embossing a thermoplastic resin nonwoven fabric, can also be used. In these target tapes, the fastening tapes 13 are combined by the hooks of the fastening tapes 13 being entangled or caught in the loops.

When the engaging portion 13A is an adhesive layer, it is possible to use a sheet substrate made of a plastic film with a smooth surface that is rich in adhesiveness and whose surface has been subjected to release treatment.

Further, when the locking portion of the fastening tape 13 on the ventral side is made of nonwoven fabric, for example, when the cover nonwoven fabric 20 in the illustrated form is made of nonwoven fabric, and when the locking portion 13A of the fastening tape 13 is made of a hook material, Alternatively, the target sheet 24 may be omitted, and the hook material may be entwined with the nonwoven fabric of the cover nonwoven fabric 20 for engagement. In this case, the target sheet 24 may be provided between the cover nonwoven fabric 20 and the liquid impermeable sheet 11 .

<Perforated nonwoven fabric>
Since the cover nonwoven fabric 20 covers the back side of the liquid-impermeable sheet 11 and forms the outer surface of the product in at least a part of the portion covering the liquid-impermeable sheet 11, it is desirable to improve air permeability. Therefore, it is preferable that the cover nonwoven fabric 20 is a perforated nonwoven fabric in which a large number of holes 14 penetrating from the front to the back are provided at intervals, as shown in the illustrated example. Although not shown, the top sheet 30 may be made of a perforated nonwoven fabric, and the gathered nonwoven fabric 62 may be made of a perforated nonwoven fabric in order to improve liquid permeability.

It is preferable that the cover nonwoven fabric 20 is provided with holes 14 all over, as in the examples shown in FIGS. However, as shown in FIG. 14, even if the cover nonwoven fabric 20 has a region having no holes 14, such as forming the holes 14 only in the middle region in the front-rear direction, which does not have the elastic members 15 to 18. good. On the other hand, in the tape-type disposable diaper described above, as shown in FIG. 17, the holes 14 can be formed throughout the cover nonwoven fabric 20 in the front-rear direction and width direction. 2 and 8, in the pants-type disposable diaper with the two-part exterior, the area where the holes 14 are formed extends from the portion of the cover nonwoven fabric 20 overlapping the front exterior 12F to the rear exterior 12B. It is desirable to continue to the overlapping part.

The planar shape (opening shape) of each hole 14 can be determined as appropriate. The hole 14 is elongated as shown in FIGS. 21(b) and 22(b), perfect circular as shown in FIGS. Any shape such as oval, triangular, rectangular, polygonal such as rhombus, star, cloud, etc., as shown in a), (d) and FIGS. As shown in FIGS. 21(c) and 22(c), holes 14 of different shapes may be mixed. The dimensions of the individual holes 14 are not particularly limited, but the dimension in the CD direction (dimension of the longest portion) 14L is preferably 0.6 to 5.0 mm, particularly 0.7 to 2.0 mm. The dimension (dimension of the longest part) 14W is preferably 0.6-5.0 mm, especially 0.6-1.2 mm. If the shape of the hole 14 is long in one direction (the total length in one direction is longer than the total length in the direction perpendicular to it) such as an elongated hole, ellipse, rectangle, rhombus, etc., the dimension in the MD direction (the dimension of the longest portion) is preferably 1.2 to 2.5 times the dimension in the CD direction perpendicular thereto (dimension of the longest portion). When the shape of the holes 14 is elongated in one direction, the longitudinal direction of the holes 14 is preferably the MD direction of the nonwoven fabric, but it may be the CD direction or an oblique direction with respect to the MD direction. In many cases, the MD direction of the nonwoven fabric is equal to the width direction WD in the outer body 12 of the pants-type disposable diaper, and equal to the front-back direction LD in the inner body 200 of the pants-type disposable diaper, except for the fastening tape in the tape-type disposable diaper. , the front-rear direction is LD.

The area and area ratio of each hole 14 may be appropriately determined, but the area is preferably about 0.1 to 2.7 mm ² (especially 0.1 to 1.0 mm ² ), and the area ratio is 1.0 mm 2 . It is preferably about 0 to 15.0% (especially 5.0 to 10.0%).

The planar arrangement of the holes 14 can be appropriately determined, and may be irregular, patterned, letter-shaped, or the like, but a regularly repeated planar arrangement is preferable. For example, as shown in FIGS. 21(a), 21(c) and 21(d), the plane arrangement of all the holes 14 is such that rows of holes 14 are arranged linearly at predetermined intervals in the CD direction at predetermined intervals in the MD direction. It is preferable that it is in the form of a matrix that repeats at intervals. In this case, as shown in FIG. 21(a), the spacing 14x of the holes 14 in the MD direction is shorter than the spacing 14y of the holes 14 in the CD direction. and the CD-direction spacing 14y of the holes 14 are substantially equal, or, as shown in FIG. can also be a long array. Further, as shown in FIGS. 21(b) and 21(e), rows of holes 91 and 92 which are linearly arranged in the CD direction at predetermined intervals are spaced apart in the MD direction and are shifted in position in the CD direction. It can be a side-by-side array. The example shown in FIG. 21B is a so-called staggered (hexagonal lattice) arrangement in which the holes 14 are alternately arranged in the adjacent hole rows 91 and 92 . Further, as shown in FIG. 21(f), as long as the adjacent hole rows 91 and 92 have a continuous portion in the CD direction, the holes 14 may be arranged in a wavy line with a center line along the orthogonal direction. Rows of holes 14 spaced apart in a direction perpendicular to the MD direction are included in those spaced in the MD direction.

The dimensions and shape of the holes 14 in the first hole row 91 and the dimensions and shape of the holes 14 in the second hole row 92 may be the same, but it is more preferable that at least one of them is different.

The CD spacing 14y and the MD spacing 14x of the holes 14 may each be constant or may vary. These can be determined as appropriate, but considering air permeability, the CD direction spacing 14y of each hole 14 is preferably in the range of 0.9 to 8.0 mm, particularly 1.0 to 3.0 mm. The MD direction interval 14x is preferably in the range of 2.0 to 10 mm, particularly 3.0 to 5.0 mm. In particular, the rows of holes 14 arranged in the CD direction at intervals 14y in the CD direction that are narrower than the dimension 14L in the CD direction of the holes 14 are repeated at predetermined intervals in the MD direction, and the intervals 14x in the MD direction are greater than the dimension 14L in the CD direction of the holes 14. When the width is also wide (more preferably at least 3 times the dimension 14W in the MD direction of the hole 14), the improvement in air permeability is remarkable, while the softness and bulkiness are not impaired, and the MD direction, which is important during manufacturing It is preferable because the decrease in tensile strength of is less. Particularly in this case, it is preferable that the shape of the hole 14 is elongated in the CD direction.

22(a) to 22(d) and (f), the planar arrangement of the holes 14 is such that groups 90 of the holes 14 arranged in a single wavy shape continuing in the MD direction are spaced apart in the CD direction. In addition, a group 90 of holes 14 spaced apart in a chain-like fashion extending in the MD direction can be spaced apart in the CD direction. The group 90 of the holes 14 arranged in a chain shape is not particularly limited as long as the portions where the holes 14 are arranged in a ring are repeated at intervals in the MD direction. Groups 90 of holes 14 arranged in a wavy pattern may be spaced apart in the CD direction, or may be chained as shown in FIG. Here, "the groups 90 of the holes 14 are arranged at intervals in the CD direction" means that between the groups 90 of the holes 14 adjacent to each other in the CD direction, straight continuous non-porous portions 93 along the MD direction are provided. means to have

The arrangement shape of the group 90 of the holes 14 can be appropriately determined as long as it is wavy. In addition to regular shapes such as a triangular wave shape, a rectangular wave shape as shown in FIG. At least one of them may be a shape that changes regularly or irregularly, or other irregular shapes.

The spacing 14x of the holes 14 in the MD direction in the group 90 of the holes 14 may be constant or variable, and can be determined as appropriate. Considering the improvement of air permeability due to the holes 14, it is desirable to make it within the range of 2.0 to 10 mm, particularly 3.0 to 5.0 mm.

Moreover, as in the example shown in FIG. It may be constant as The CD-direction spacing 14y of the holes 14 in the row 94 of the holes 14 is desirably in the range of 0.9 to 8.0 mm, particularly 1.0 to 3.0 mm. Also, the CD-direction interval 14y of the holes 14 in the row 94 of the holes 14 may be longer or the same as the MD-direction interval 14x of the holes 14 in the group 90 of the holes 14, but may be shorter (2 to about 5 times) is desirable.

The cross-sectional shape of the hole 14 is not particularly limited. For example, even if the hole 14 is a punched-type hole whose periphery is formed by cut ends of fibers, there are almost no cut ends of fibers around the periphery of the hole 14, and a pin is inserted between the fibers to spread them. It may also be a non-punched type hole (high fiber density at the edge) formed in the hole. As shown in FIG. 24(d), even if the diameter of the punched hole 14 decreases toward the middle in the thickness direction, the hole decreases toward one side in the thickness direction (not shown). may

The non-punched type hole 14 is one in which the diameter of the hole 14 decreases from the pin insertion side toward the opposite side. This includes cases in which the diameter of the pores 14 continues to decrease throughout the thickness of the nonwoven fabric layer, as well as cases in which the diameter of the pores 14 does not substantially decrease in the middle of the thickness. As shown in FIGS. 24(a) and 24(c), such a non-punching type hole has a protrusion in which fibers are extruded to the side opposite to the pin insertion side at the edge of the hole 14 on the side opposite to the pin insertion side. A portion (burr) 14e is formed and no projecting portion 14e is formed on the pin insertion side, and as shown in FIG. The protrusion 14e is formed on the side opposite to the pin insertion side, and the protrusion 14e is formed on the pin insertion side by extruding fibers to the pin insertion side. Furthermore, in the former type of hole 14, as shown in FIG. A facing portion having the highest protruding height 14i and a facing portion facing in a direction orthogonal thereto and having the lowest protruding height 14j are included. It is desirable that the projecting portion 14e is continuous in the circumferential direction of the hole and has a cylindrical shape. good too. The heights of protrusions 14h, 14i, 14j (apparent heights measured with an optical microscope when no pressure is applied) 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 vary in the circumferential direction of the hole 14 .

For example, when a hole 14 having a shape elongated in one direction is formed by inserting a pin as shown in FIGS. A protruding portion (burr) 14e is formed such that the protruding height 14i of the opposed portion in the longitudinal direction of the hole 14 is higher than the protruding height 14j of the opposed portion in the direction orthogonal to the longitudinal direction. The protruding portion 14e of the hole 14 may have a lower fiber density than its surrounding portion, but preferably has a similar or higher fiber density.

In particular, the perforated nonwoven fabric has a fineness of 0.1 to 5.0 dtex (more preferably 1.0 to 3.0 dtex), a weight per unit area of 15 to 20 g/m ² (more preferably 15 to 18 g/m ² ), and a thickness of 0.5 g/m 2 . In the case of a filament nonwoven fabric of 3 to 0.8 mm (more preferably 0.3 to 0.6 mm), when the hole 14 is formed by inserting a pin, the protrusion 14e formed at the edge of the hole 14 becomes lower. . More specifically, in the case of the long-fiber nonwoven fabric within the above specific range, the fibers are less likely to be extruded in the thickness direction when the pin insertion holes are formed. This is because the fibers to which the force is applied by the pin insertion are continuous (continuous fibers) while being entangled throughout the nonwoven fabric, and the movement of the fiber in the portion to which the force is applied by the pin insertion is suppressed by the portion connected to the outside. is. Furthermore, since the long-fiber nonwoven fabric in the specific range described above basically has a moderately low fiber density, the movement of the fibers in the direction orthogonal to the thickness direction is relatively easy. As a result, when a pin is inserted into the long-fiber nonwoven fabric in the above-mentioned specific range to form the hole 14 with the size in the above-mentioned specific range, when the pin is inserted, the fibers in the vicinity of the pin radiate from the pin insertion direction. Since it moves toward the pin exit side while being pushed out in the direction, the height of the projecting portion 14e is reduced although it is formed. Also, as a result, a high-density portion having a higher fiber density than the surrounding area is formed at the edge of the hole 14 . This high-density portion has the advantage of enhancing the shadow between the periphery of the hole and the hole, thereby improving the visibility of the hole.

<Adhesion of perforated nonwoven fabric>
The perforated nonwoven fabric has another sheet facing the supporting surface on the supporting surface opposite to the exposed surface exposed to the outside (when the perforated nonwoven fabric is the cover sheet 20, the liquid-impermeable sheet 11 is the other sheet). ) can be adhered via the hot melt adhesive 20H. This bonding pattern is not particularly limited, but like the bonding structure between the cover nonwoven fabric 20 and the liquid-impermeable sheet 11 shown in FIG. It is preferable that there is no hot-melt adhesive 20H and that the hot-melt adhesive 20H exists in a continuous plane except for the peripheral edge portion 14c of the region overlapping with the hole 14. FIG. Since there is no hot-melt adhesive 20H on the central side of the peripheral edge portion 14c of the region overlapping the hole 14, the hot-melt adhesive 20H does not make the skin feel sticky, and the projecting portion 14e around the hole 14 is securely fixed. be.

As a representative adhesive state, as shown in FIGS. 11A and 11B, there is no hot-melt adhesive 20H in the area overlapping the hole 14, and the hot-melt adhesive 20H is continuous in areas other than the area overlapping the hole 14. As shown in FIGS. 11(c) and 11(d), the hot-melt adhesive 20H protrudes into the peripheral edge portion 14c of the area overlapping the hole 14, but the peripheral edge of the area overlapping the hole 14 is in a planar state. There is no hot-melt adhesive 20H on the central side of the portion 14c, and the hot-melt adhesive 20H exists in a continuous surface except for the peripheral portion 14c of the region overlapping with the hole 14, for example. Moreover, the width of the hot-melt adhesive 20H that protrudes from the peripheral edge portion 14c of the region overlapping with the hole 14 is preferably half or less than the thickness of the perforated nonwoven fabric, and is preferably about 0.5 mm or less. Moreover, it is desirable that the hot-melt adhesive 20H does not exist in 80% or more of the area of the region overlapping the hole 14 . Adhesive structures such as these can be formed by the method described in Patent Document 4, for example.

<Whiteness of perforated nonwoven fabric>
Like the cover nonwoven fabric 20 in the illustrated example, the perforated nonwoven fabric having an exposed surface exposed to the outside has a thickness of 0.30 to 1.5 mm and the minimum dimensions of the holes 14 (the dimension in the MD direction and the dimension in the CD direction). means the shorter one of the dimensions, for example, in the case of an elliptical hole 14 having a major axis along the MD direction, it means the dimension in the CD direction, and in the case of a circle, it means the diameter. In some cases, when the whiteness of the exposed surface of the perforated nonwoven fabric is 70% or more, the whiteness of the outer portion of the perforations 14 is high, resulting in shadows between the outer portions of the perforations 14 and the edges of the perforations 14. This is preferable because the difference becomes large and the holes 14 can be easily recognized visually.

A particularly preferred thickness of the perforated nonwoven fabric is 0.35 to 1.2 mm. Also, the minimum dimension of the pores 14 of the particularly preferred perforated nonwoven fabric is 0.60 to 1.2 mm. Furthermore, the whiteness of the exposed surface of the perforated nonwoven fabric is particularly preferably 73% or more, more preferably 80% or more.

Density can be increased to increase the whiteness of the perforated nonwoven fabric, but this not only increases cost but also reduces softness. Therefore, the perforated nonwoven fabric has a fiber fineness of about 1.8 to 6.0 dtex and a weight per unit area of about 15 to 25 g/m ² . Supplementation is preferred. As the perforated nonwoven fabric which satisfies these conditions and has sufficient strength, a spunbonded nonwoven fabric having holes formed therein is suitable.

If the whiteness of the perforated nonwoven fabric is too high, the portion overlapping the back side of the perforated nonwoven fabric, such as another sheet facing the support surface of the perforated nonwoven fabric (if the perforated nonwoven fabric is the cover sheet 20, When the liquid-impermeable sheet 11 becomes another sheet), when a display that can be seen through the outer surface of the perforated nonwoven fabric is printed, the display may become difficult to see. Therefore, the whiteness of the perforated nonwoven fabric is preferably 85% or less. In addition, the display includes patterns for decoration (including pictures and one-point characters), function display such as usage method, use assistance, size, etc., or mark display such as manufacturer or product name, characteristic function, etc. , is added to an appropriate member by printing or the like.

The whiteness of another sheet facing the support surface of the perforated nonwoven fabric (when the perforated nonwoven fabric is the cover sheet 20 as in the illustrated example, the liquid impermeable sheet 11 is the other sheet) is particularly limited. The surface of the other sheet on the perforated nonwoven fabric side is a portion exposed through the holes 14 , although it is not a sheet. Therefore, in the other sheet, the degree of whiteness of at least the non-colored portion on the surface of the perforated nonwoven fabric side is 70% or more, more preferably 80% or more, similarly to the exposed surface of the perforated nonwoven fabric . By exposing the high-whiteness portion inside the hole 14, the difference between the inner portion of the hole 14 and the shadow generated on the edge of the hole 14 becomes larger, and the hole 14 becomes more visible. As described above, the other sheet facing the support surface of the perforated nonwoven fabric may be marked with a mark by printing or the like, and the whiteness of the colored portion for such mark shall not be 70% or more. Sometimes. However, since the visibility of the holes 14 overlapping the colored parts is good because the colored parts serve as a background, the visibility of the holes 14 as a whole is improved because at least the non-colored parts (non-printed parts) have a high degree of whiteness. improves.

<Effect confirmation test>
Using the various cover nonwoven fabrics shown in Table 1, the inner body 200 having the structure shown in FIGS. , 0: The hole can be identified, and x: The hole is assimilated into the surrounding area and is difficult to identify. The evaluation results are shown in Table 1. The method for measuring the whiteness of the cover nonwoven fabric 20 and the liquid impermeable sheet 11 is as described above. In addition, when measuring the whiteness of this test, a simple spectral color difference meter NF333 manufactured by Nippon Denshoku Industries Co., Ltd. was used, and five points on the same measurement surface (in the case of the liquid-impermeable sheet 11, the whiteness (Non-colored portion with high ) was measured, and the average value (N=5) was obtained. Moreover, the minimum dimension of the holes 14 of the cover nonwoven fabric was measured by using a microscope in the state of natural length.

As shown in Table 1, in Samples 5 and 6, which had a whiteness of less than 70%, and in Sample 7, which had a whiteness of 70% or more but had a minimum pore dimension of less than 0.6 mm , the pores differed from the surroundings. The results were assimilated and difficult to identify. On the other hand, Samples 1 to 4, which had a whiteness of 70% or more and a minimum pore size of 0.6 mm or more, had good hole visibility.

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

・"Front-back direction" means the direction (longitudinal direction) indicated by symbol LD in the figure, and "width direction" means the direction (left-right direction) indicated by WD in the figure. are orthogonal.

・"MD direction" and "CD direction" mean the flow direction (MD direction) and the transverse direction (CD direction) perpendicular to this in the manufacturing equipment, and one of them is the front-back direction depending on the part of the product and the other is the width direction. The MD direction of a nonwoven fabric is the direction of fiber orientation of the nonwoven fabric. The fiber orientation is the direction along which the fibers of the nonwoven fabric are aligned. It can be determined by a simple measurement method for determining the orientation direction.

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

・"Front surface" means the side of the member that is closest to the wearer's skin when wearing the pants-type disposable diaper, and the "back surface" means the side that is close to the wearer's skin when wearing the pants-type disposable diaper. means the far side.

・"Area ratio" means the ratio of the target portion to the unit area, and is expressed as a percentage by dividing the total area of the target portion (e.g., holes) in the target region (e.g., cover nonwoven fabric) by the area of the target region. is. In a form in which a large number of target portions are provided at intervals, it is desirable to determine the area ratio by setting the target region to a size that includes 10 or more target portions. For example, the pore area ratio can be measured by using, for example, VHX-1000 (trade name) manufactured by KEYENCE Co. under the following procedure under the measurement condition of 20 times.
(1) Set on a 20x lens and adjust the focus. Adjust the position of the non-woven fabric so that there are 4×6 holes.
(2) Designate the brightness of the area of the hole and measure the area of the hole.
(3) Click the color extraction of "area measurement" of "measurement/comment". Click on the part of the hole.
(4) Click "Batch measurement", check "Display measurement result window", and save as CSV data.

- "Elongation rate" means a value when the natural length is taken as 100%. For example, an elongation rate of 200% is synonymous with an elongation 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 deionized water: 97.09 wt% 1.0 g of superabsorbent polymer is added to 49.0 g of the mixture) and stirred with a stirrer. The resulting gel is left in a constant temperature and humidity bath at 40° C. and 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500 manufactured by I. techno Engineering).

- "Matsuke" is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (test location: temperature 23±1° C., relative humidity 50±2%) to a constant weight. Pre-drying refers to making a sample or test piece constant weight in an environment at a temperature of 100°C. Fibers with an official moisture content of 0.0% do not need to be pre-dried. Using a sampling template (100 mm x 100 mm), a sample with dimensions of 100 mm x 100 mm is cut from the constant weight specimen. The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as basis weight.

- "Thickness" is automatically measured using an automatic thickness gauge (KES-G5 handy compression measurement program) under the conditions of a load of 0.098 N/cm ² and a pressurized area of 2 cm ² . The thickness of the perforated nonwoven fabric is measured at portions other than the perforations and the protrusions around them.

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

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

- "Unfolded state" means a flat unfolded state without contraction or slack.

・Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

- "Melt viscosity" is measured at a specified temperature using a Brookfield type B viscometer (spindle No. 027) according to JIS Z 8803.

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

INDUSTRIAL APPLICABILITY The present invention can be used for general disposable wearing articles such as underpants-type disposable diapers, tape-type disposable diapers, pad-type disposable diapers, disposable swimsuits, diaper covers, sanitary napkins, and the like.

DESCRIPTION OF SYMBOLS 11... Liquid impermeable sheet, 12... Exterior body, 12A... Side seal part, 12B... Rear exterior body, 12F... Front exterior body, 12H... Inner sheet layer, 12S... Outer sheet layer, 20... Cover nonwoven fabric, 20H Hot-melt adhesive 14 Hole 14e Projection 18 Unnecessary elastic member 200 Inner body 201 Internal/external joint 30 Top sheet 40 Intermediate sheet 50 Absorbing element 56 Absorbing Body 58 Packaging sheet 60 Side gathers 62 Gathered non-woven fabric A1 Non-stretchable area A2 Stretchable area C Buttock cover L Intermediate area LD Back-and-forth direction LO Leg opening T: waist region, U: lower waist portion, W: waist portion, WD: width direction, WO: waist opening, 93: non-porous portion.

Claims (7)

It has a perforated nonwoven fabric in which a large number of holes penetrating on the front and back are provided at intervals,
The perforated nonwoven fabric has an exposed surface exposed to the outside and a support surface adhered to another sheet,
Disposable wearing articles,
The holes of the perforated nonwoven fabric are non-punched holes formed by inserting pins between fibers and expanding them,
The perforated nonwoven fabric has a basis weight of 15 to 25 g/m ² ,
The perforated nonwoven fabric has a thickness of 0.30 to 1.2 mm,
The shape of the hole is a perfect circle or an ellipse,
the minimum dimension of the hole is 0.6 to 1.2 mm;
The whiteness of the exposed surface of the perforated nonwoven fabric is 70% or more ,
In the other sheet, the whiteness of at least the non-colored portion on the surface on the perforated nonwoven fabric side is 80% or more,
An outer portion of the hole, an edge of the hole, and an inner portion of the hole are exposed to the outside.
A disposable wearing article characterized by: The perforated nonwoven fabric is a nonwoven fabric containing a white pigment and having a fineness of the constituent fibers of 1.8 to 6.0 dtex.
The disposable wearing article according to claim 1. A display that can be seen through the exposed surface of the perforated nonwoven fabric is printed on a portion of the perforated nonwoven fabric that overlaps the opposite side of the exposed surface,
The whiteness of the perforated nonwoven fabric is 85% or less,
The connectable disposable wearing article according to claim 1 or 2. The perforated nonwoven fabric is a long fiber nonwoven fabric having a constituent fiber fineness of 0.1 to 5.0 dtex, a basis weight of 15 to 20 g/m ² and a thickness of 0.3 to 0.8 mm,
A high-density part having a higher fiber density than the surrounding area is formed at the edge of the hole in the perforated nonwoven fabric,
The disposable wearing article according to claim 1. An absorbent article comprising an absorbent body, a breathable liquid-impermeable sheet covering the back side of the absorbent body, and a cover nonwoven fabric covering the back side of the liquid-impermeable sheet,
The cover nonwoven fabric is the perforated nonwoven fabric, and the liquid-impermeable sheet is the other sheet,
The disposable wearing article according to any one of claims 1-4. The holes are arranged so that rows of holes spaced in one of the front-rear direction and width direction are spaced in the other direction,
the distance between the holes in the one direction is 1.0 to 5.0 mm;
the interval in the other direction is 2.5 to 10.0 mm;
The disposable wearing article according to any one of claims 1-5. The holes are arranged so that a group of holes arranged in a single wave shape or a chain shape continuing in one of the front-rear direction and the width direction are spaced apart in the other direction,
The arrangement of the holes is such that rows of holes spaced apart in the other direction are spaced in the one direction,
the interval in the other direction of the holes in the row of holes is 1.0 to 5.0 mm;
the spacing of the holes in the group of holes in the one direction is 2.5 to 10.0 mm;
The disposable wearing article according to any one of claims 1-5.

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