TW202023505A - Disposable worn article - Google Patents

Abstract

To improve the visibility of holes in a perforated non-woven fabric exposed to the outside of a disposable worn article. This problem is resolved by means of a disposable worn article including a perforated non-woven fabric in which multiple holes, penetrating through from the front to the back thereof, are provided spaced apart, characterized in that the perforated non-woven fabric has an exposed surface exposed to the outside, and a supporting surface facing another sheet, and in that the thickness of the perforated non-woven fabric is 0.30 to 1.5 mm, the minimum dimension of the holes is 0.6 to 5 mm, and the brightness of the exposed surface of the perforated non-woven fabric is at least equal to 70%.

Description

Disposable wearing items

The present invention relates to a disposable wearing article, which has a portion to which a perforated non-woven fabric is attached.

Most disposable wearing articles such as disposable diapers and sanitary napkins use non-woven fabrics on the outer surface or inner surface of the product in order to create a cloth-like appearance and skin touch. As this non-woven fabric, in addition to the non-porous non-woven fabric having no holes other than the fiber gaps, a porous non-woven fabric having a plurality of holes penetrating the front and back surfaces can also be used (see Patent Documents 1 to 4).

The perforated non-woven fabric also has the additional effect of improving the aesthetics and practicality of air permeability and liquid permeability, so it is extremely important to recognize the existence of holes more clearly (visual effect).

However, if the non-woven fabric used for disposable wearing articles is so thin that the holes are reduced to a certain extent, the holes will be assimilated to the surrounding non-porous parts, and it will be difficult to identify the existence of holes . As a result, the visual effect cannot be fully exerted, and it is difficult to accurately convey the air permeability and liquid permeability enhancement function to the user.

[Prior Technical Literature] (Patent Document) Patent Document 1: Japanese Patent Application Publication No. 2015-128573 Patent Document 2: Japanese Patent Application Publication No. 2002-178428 Patent Document 3: Japanese Patent Application Publication No. 2009-136504 Patent Document 4: Japanese Patent Application Publication No. 2018-51181

[The problem to be solved by the invention] Therefore, the main problem to be solved by the present invention is to improve the visibility of the holes of the perforated non-woven fabric exposed to the outside for disposable wearing articles.

[Technical means to solve the problem] A representative aspect of the present invention for solving the above-mentioned problems is described below. >First aspect> A disposable wearing article that has a perforated non-woven fabric with a plurality of holes penetrating the front and back surfaces at intervals; The aforementioned perforated non-woven fabric has an exposed surface exposed to the outside and a supporting surface facing other sheets; The characteristics of the disposable wearing article are: The thickness of the aforementioned perforated nonwoven fabric is 0.30～1.5mm, The minimum size of the aforementioned hole is 0.6～5mm, The whiteness of the exposed surface in the perforated nonwoven fabric is 70% or more.

(Effect) The inventors of the present invention have studied the visibility of the holes of the perforated nonwoven fabric and found that if the whiteness of the exposed surface of the perforated nonwoven fabric is low, the visibility of the holes will be low. The reason is uncertain, but the general understanding is as follows. In other words, the visibility of the hole varies depending on the degree of the shadow generated on the edge of the hole. If the whiteness of the holey nonwoven is less than 70%, the whiteness of the outer part of the hole is low, so the outer part of the hole The shadow difference from the edge of the hole decreases, which reduces the visibility of the hole. This tendency becomes particularly significant when the thickness of the perforated nonwoven fabric and the minimum size of the holes are within the above range. Here, if the whiteness of the perforated nonwoven fabric is 70% or more, the whiteness of the outer part of the hole is high, so that the difference between the shadow generated by the outer part of the hole and the edge of the hole becomes large, even if the nonwoven is thin to a certain degree If the hole is reduced to a certain degree, the hole can be easily identified. This disposable wearing article is completed based on this knowledge. As mentioned above, it has the characteristic that when the non-woven fabric is thin to a certain degree and the holes are also reduced to a certain degree, the white of the non-woven fabric with holes The degree is set to 70% or more to improve the visibility of the hole.

In addition, the whiteness refers to the value measured by "ISO whiteness (diffuse blue reflectance)" stipulated by JIS P8148:2001. In particular, when the measurement object is a perforated nonwoven fabric, the test piece bundle used is laminated so that at least the holes of the uppermost test piece and the holes of the test piece adjacent to the lower side do not overlap. The sample size is specified under the same regulations, but the sample size is not limited as long as it can be measured by a measuring device. In the case of measuring the whiteness of the perforated nonwoven fabric in the product, when a sample of sufficient size cannot be obtained for measurement, the same raw material can be used to make the sample and the whiteness can be measured. As a measurement device for whiteness, for example, a simple spectrophotometer NF333 manufactured by Nippon Denshoku Industries Co., Ltd. or a spectrophotometer PF-10 type can be used. In addition, the "minimum size" of the hole refers to the shorter of the size in the MD direction and the size in the CD direction.

>Second aspect> The disposable wearing article as described in the first aspect, wherein the aforementioned perforated non-woven fabric is a non-woven fabric containing a white pigment, and its constituent fibers have a fineness of 1.8 to 6.0 dtex and a mass per unit area It is 15-25g/m ² .

(Effect) Although it is possible to increase the density in order to increase the whiteness of the perforated nonwoven fabric, it will not only increase the cost but also decrease the softness. Therefore, for the porous nonwoven fabric, it is preferable to set its fineness and mass per unit area within the above-mentioned range, and to make up for the lack of whiteness by appropriately containing white pigments such as titanium oxide.

>The third aspect> The disposable wearing article as described in the first aspect or the second aspect, wherein, Overlaid on the portion of the perforated nonwoven fabric on the side opposite to the exposed surface is printed with an indication that the perforated nonwoven fabric can be seen through the exposed surface of the perforated nonwoven fabric, The whiteness of the aforementioned perforated nonwoven fabric is 85% or less.

(Effect) If the whiteness of the perforated nonwoven fabric is too high, it may not be easy to see it when the part that overlaps the back side of the perforated nonwoven fabric is printed with a display that can be seen from the outer surface of the perforated nonwoven fabric through the perforated nonwoven fabric. Said. Therefore, it is preferable that the whiteness of the perforated nonwoven fabric is within the above range.

>Fourth aspect> The disposable wearing article as described in any one of the first aspect to the third aspect, wherein, The whiteness of at least the non-colored portion on the surface of the porous nonwoven fabric side of the other sheet is 70% or more.

(Effect) The whiteness of the other sheet facing the support surface of the perforated nonwoven fabric is not particularly limited, but the surface on the side of the perforated nonwoven fabric in the other sheet is the part exposed through the holes. Therefore, if the whiteness of at least the non-colored part of the surface on the side of the porous nonwoven fabric in the other sheet is 70% or more, the part with high whiteness is exposed inside the hole, thereby making the part inside the hole and the hole The difference in the shadow generated by the edge of the hole becomes larger, and the hole can be recognized more easily.

>Fifth aspect> The disposable wearing article according to any one of the first aspect to the fourth aspect, comprising: an absorber; a liquid-impermeable sheet that covers the back side of the absorber and has air permeability; and , Masking non-woven fabric, which covers the back side of this liquid-impermeable sheet; The aforementioned mask non-woven fabric is the aforementioned perforated non-woven fabric, and the aforementioned liquid-impermeable sheet is the aforementioned other sheet.

(Effect) In disposable wearing articles, a breathable liquid-impermeable sheet is generally used to cover the back of the absorbent body, and a mask non-woven fabric is further used to cover the back of the liquid-impermeable sheet, and the disposable wearing article is made as Fabric-like appearance. From the viewpoint of improving air permeability, not only the liquid-impermeable sheet, but also the air permeability in the thickness direction of the mask non-woven fabric and the air permeability between the mask non-woven fabric and the liquid-impermeable sheet are also important. In addition, the non-woven masking fabric is exposed on the outer surface of the product, so it will become a part that appeals to consumers for its good appearance and the aesthetics and practicality of the product. Therefore, it is preferable to apply the aforementioned whiteness perforated nonwoven fabric to such a mask nonwoven fabric.

>Sixth aspect> The disposable wearing article as described in any one of the first aspect to the fifth aspect, wherein, In the aforementioned holes, rows of holes arranged at intervals in either the front-to-rear direction and the width direction are arranged so as to be arranged at intervals in the other direction, The spacing of the holes in one of the directions is 1.0 to 5.0 mm, The interval in the other direction is 2.5 to 10.0 mm.

(Effect) The arrangement of the holes of the perforated nonwoven fabric is not particularly limited, but when the holes are arranged in a fine and regular pattern as in the present aspect, the identification of the holes is particularly important. Therefore, in the arrangement of holes in this aspect, it is preferable to have the whiteness of the aforementioned perforated nonwoven fabric.

>Seventh aspect> The disposable wearing article as described in any one of the first aspect to the fifth aspect, wherein, The aforementioned holes are a group of holes arranged in a continuous wave or chain shape in either the front-to-rear direction and the width direction, and are arranged so as to be arranged at intervals in the other direction , The arrangement of the holes is a row of holes arranged at intervals in the other direction and arranged at intervals in one of the directions, In the row of the holes, the interval in the other direction of the holes is 1.0 to 5.0 mm, The interval of the holes in the aforementioned one direction in the group of the holes is 2.5 to 10.0 mm.

(Effect) The arrangement of the holes of the perforated nonwoven fabric is not particularly limited, but when the holes are arranged in a fine and aesthetically regular pattern as in the present state, the identification of the holes is particularly important. Therefore, in the arrangement of holes in this aspect, it is preferable to have the whiteness of the aforementioned perforated nonwoven fabric.

[Effects of the invention] According to the present invention, it has the advantages of improving the visibility of the holes of the perforated non-woven fabric exposed to the outside of disposable wearing articles.

Hereinafter, examples of disposable wearing articles will be described in detail with reference to the drawings. The dot pattern part of the cross-sectional view shows the adhesive as a joining means, which is used to join the constituent members on the front side and the back side. The joining means is applied on the entire surface of the hot melt adhesive. Cloth, bead coating, curtain coating, summit coating, spiral coating, or pattern coating (pattern coating, in relief coating) It is formed by the transfer of hot melt adhesive), etc.; or, for the fixed part of the elastic member, instead of the above-mentioned joining means or using the above-mentioned joining means together, by a comb gun or a rubber band nozzle (SureWrap) Coating or the like is applied to the outer peripheral surface of the elastic member to form a joining means. The hot melt adhesive is not particularly limited. For example, EVA (Ethylene-Vinyl Acetate), viscous rubber (elastomer), olefin, polyester/polyamide, etc. can be used Types of hot melt adhesives. It is also possible to use material welding means such as heat seal and ultrasonic seal as the joining means for joining the constituent members.

As the non-woven fabric described below, a conventional non-woven fabric can be appropriately used according to the location and purpose. As the constituent fibers of the non-woven fabric, in addition to synthetic fibers such as olefin-based, polyester-based, and polyamide-based fibers such as polyethylene or polypropylene (in addition to single-component fibers, composite fibers such as core and sheath) can be selected, Regenerated fibers such as rayon and cupra, and natural fibers such as cotton can also be used without particular limitation, and these fibers can also be used in combination. In order to improve the flexibility of the nonwoven fabric, it is preferable that the constituent fibers are crimped fibers. In addition, the constituent fibers of the nonwoven fabric may be hydrophilic fibers (including fibers that are hydrophilic by a hydrophilic agent), hydrophobic fibers, or water-repellent fibers (including water-repellent fibers that are water-repellent by a water-repellent agent). ). In addition, non-woven fabrics are generally classified into short-fiber non-woven fabrics, long-fiber non-woven fabrics, spunbonded non-woven fabrics, melt-blown non-woven fabrics, spunlace non-woven fabrics, and hot rolled (hot air) non-woven fabrics based on fiber length, sheet forming method, fiber bonding method, and laminated structure. , Needle-punched non-woven fabrics, point-bonded non-woven fabrics, laminated non-woven fabrics (In addition to the same or similar non-woven fabric layers laminated SSS non-woven fabrics, different non-woven fabric layers are laminated, and the meltblown layer is sandwiched between the spunbond layers. Non-woven fabrics, SMMS non-woven fabrics, etc.), etc., any of these non-woven fabrics can also be used.

>Example of shorts type disposable diaper> Figures 1 to 6 show shorts-type disposable diapers. This shorts-type disposable diaper is provided with: a front outer body 12F constituting a front body (ventral part) F; a rear outer body 12B constituting a back body (back part) B; and an inner body 200, which The front exterior body 12F is provided on the inner side of the exterior body 12F, 12B in a manner extending from the crotch to the rear exterior body 12B; and, both sides of the front exterior body 12F and both sides of the rear exterior body 12B The sides are joined to form a side seal 12A, whereby the opening formed by the front and rear ends of the outer body 12F, 12B becomes a waist opening WO for the wearer's waist to pass through. On both sides of the width direction of 200, the portions respectively surrounded by the lower edges of the exterior bodies 12F and 12B and the side edges of the interior body 200 become leg openings LO through which the legs pass. The inner body 200 is a part for absorbing and holding excrement such as urine, and the outer bodies 12F and 12B are parts for supporting the inner body 200 with respect to the wearer's body. In addition, the symbol Y represents the full 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 represents the full width of the diaper in the unfolded state .

In addition, the shorts-type disposable diaper of this example has: a waist area T, which is defined as having a front-back direction range of the side seal portion 12A (a front-back direction range from the waist opening WO to the upper end of the leg opening LO); and, The middle area L is defined as the front-rear direction range of the portion forming the leg opening LO (between the front-rear direction area of the front body F with the side seal portion 12A and the back body B). The waist area T can be schematically divided into: "waist" W, which forms the edge of the waist opening; and "waist lower" U, which is a part located below the "waist" W. Generally, when there is a boundary (for example, a change in the thickness and elongation of the elastic member) in the waist area T where the stretching stress in the width direction WD can be changed, it is closer to the waist opening WO side than the boundary closest to the waist opening WO side When there is no such boundary, the part closer to the waist opening WO than the absorbent body 56 or the inner body 200 becomes the waist W. The lengths in the front and rear directions vary depending on the size of the product, and can be appropriately determined. For example, the waist W can be 15-40 mm, and the lower waist U can be 65-120 mm. On the other hand, the edges on both sides of the middle region L are gathered in a U-shaped or curved shape along the circumference of the wearer's legs, where the wearer's legs are penetrated. As a result, the shorts-type disposable diaper in the expanded state has a substantially hourglass shape as a whole.

(Inside and outside junction) The fixing of the inner body 200 with respect to the outer bodies 12F and 12B can be performed by a bonding means based on material welding such as heat sealing and ultrasonic sealing, or a hot melt adhesive. In the illustrated form, the back surface of the inner body 200 is made through the hot melt adhesive applied on the back surface of the liquid-impermeable layer 11 and the root portion 65 of the side folds 60 in this case It is fixed to the inner surface of exterior body 12F, 12B. The inner and outer joints 201 that fix the inner body 200 and the outer body 12F, 12B together can be provided in almost the entire area where the two overlap, for example, can be provided on the inner body 200 except for the widthwise ends The outside part.

(Internal body) The inner body 200 can take any shape, and is rectangular in the illustrated form. The inner body 200, as shown in FIGS. 3 to 5, has a top sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbent member 50 between them, and is the main body responsible for the absorption function. unit. Symbol 40 indicates an intermediate sheet, which is provided between the top sheet 30 and the absorbent member 50 in order to quickly transfer liquid that has penetrated the top sheet 30 to the absorbent member 50; symbol 60 indicates from both sides of the inner body 200 The side folds 60 extending in contact with the periphery of the wearer's legs are used to prevent excrement from leaking from both sides of the inner body 200.

(Top piece) The top sheet 30 has liquid-permeable properties, and examples thereof include non-woven fabrics with or without holes, and porous plastic sheets.

The both sides of the top sheet 30 may be folded back toward the back side at the side edge of the absorbent member 50, or may be exposed in the lateral direction rather than the side edge of the absorbent member 50 without being folded back.

The top sheet 30 is desirably fixed to the back side by bonding means such as heat sealing, ultrasonic sealing, etc., or by hot-melt adhesive, in order to prevent positional deviation with respect to the back side member. On adjacent components. In the illustrated form, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion on the surface side of the absorber 56 in the packaging sheet 58 by a hot-melt adhesive applied on the back side. on.

(Intermediate film) In order to quickly transfer the liquid that has penetrated the top sheet 30 to the absorbent body, an intermediate sheet (also referred to as a “second sheet”) 40 having a faster liquid penetration speed than the top sheet 30 can be provided. The intermediate sheet 40 not only allows the liquid to be quickly transferred to the absorbent body to improve the absorption performance of the absorbent body, but also prevents the phenomenon of "back-seepage" of the absorbed liquid from the absorbent body, and keeps the top sheet 30 always dry ( The skin is dry). The intermediate piece 40 can also be omitted.

As the intermediate sheet 40, for example: the same material as the top sheet 30, or spunlace nonwoven fabric, spunbond nonwoven fabric, SMS (spunbond-meltblown-spunbond) nonwoven fabric, pulp nonwoven fabric , Mixed sheet of pulp and rayon, point-bonded non-woven fabric, or crepe paper. In particular, the hot-air non-woven fabric is relatively fluffy, so it is better. The hot-air non-woven fabric preferably uses a composite fiber with a core-sheath structure. In this case, the resin used for the core may be polypropylene (PP), preferably high-rigidity polyester (PET). The mass per unit area is preferably 20 to 80 g/m ² , more preferably 25 to 60 g/m ² . The thickness of the raw fiber of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the non-woven fabric bulky, it is preferable to use eccentric fibers, hollow fibers, or eccentric and hollow fibers with a central coreless as a mixed fiber of all or part of the raw fibers.

The intermediate sheet 40 in the form shown in the figure is shorter than the width of the absorber 56 and is arranged in the center, but it may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the full length of the diaper, or the length of the absorbent member 50 may be the same, or may be within a shorter length range centered on the liquid-containing area.

The intermediate sheet 40 is desirably fixed to the back side by means of welding of materials such as heat sealing, ultrasonic sealing, etc., or by hot-melt adhesive, for the purpose of preventing position shift with respect to the back side member. On adjacent components. In the illustrated form, the intermediate sheet 40 is fixed to the surface of the portion located on the surface side of the absorber 56 in the packaging sheet 58 by a hot-melt adhesive applied on the back side.

(Impermeable tablets) The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the following examples can be cited: plastic film, which is composed of olefin resins such as polyethylene and polypropylene, etc.; laminated non-woven fabric, which is a non-woven fabric A plastic film is arranged on the surface; or, a laminated sheet, which is formed by overlapping non-woven fabrics and the like on the plastic film and joining them. The liquid-impermeable sheet 11 preferably uses a material having liquid-impermeability and moisture permeability, and this material is favorably used from the viewpoint of preventing dampness. As a moisture-permeable plastic film, a microporous plastic film is widely used. The plastic film is formed by kneading an inorganic filler in an olefin resin such as polyethylene and polypropylene, and forming it into a sheet. It is obtained by extending in the axial direction. In addition, it is also possible to use a liquid-impermeable sheet that does not use a plastic film as the liquid-impermeable sheet 11. The sheet uses a non-woven fabric made of microdenier fiber. It is made by methods such as leak-proof reinforcement, or coating of super absorbent resin or hydrophobic resin, and water-repellent processing agent. The leak-proof reinforcement is made by applying heat or pressure to make the fiber pores smaller.

The liquid-impermeable sheet 11, in addition to having a width that can be accommodated on the back side of the absorbent member 50 as shown in the figure, can also be wound on both sides of the absorbent member 50 and extended to the absorbent member in order to improve leakage resistance. 50 of the top sheet 30 on both sides of the side. The width of this extension is about 5-20mm on the left and right.

(Side folds) Side wrinkles 60, which extend along both sides of the inner body 200 and throughout the entire front-to-back direction LD, and are arranged to contact the wearer's legs to prevent side leakage, and are generally called three-dimensional wrinkles The folds of the plane folds are also included here.

The side gathers 60 of the first structure shown in FIGS. 3 and 4 are so-called three-dimensional gathers, which stand up from the side of the inner body 200 toward the surface side. In this side gather 60, the root side portion is raised obliquely toward the center side in the width direction, and the portion closer to the tip side than the middle portion is raised obliquely toward the outer side in the width direction, but it is not limited to this, and may be appropriately The whole change is to stand up toward the center side in the width direction.

To explain in more detail, the side gathers 60 of the first structure are formed by using a belt-shaped gather non-woven fabric 62 having the same length as the length of the inner body 200 in the front-rear direction as the tip portion Folded back in the width direction WD and folded into two layers, and between the folded part and the sheet close to the folded part, a plurality of elongated corrugated elastic members 63 are fixed to the width at intervals in an extended state along the length direction Direction WD. The base end portion of the side gathers 60 on the side opposite to the tip end portion (the end portion on the side opposite to the sheet folded portion in the width direction WD) is set as a root portion 65, which is fixed to The inner body 200 has a side portion closer to the back side than the liquid-impermeable sheet 11; the portion other than the root portion 65 is set as the main body portion 66 extending from the root portion 65 (the portion on the side of the folded portion). In addition, the main body portion 66 is composed of a root side portion facing the center side in the width direction, and a tip side portion turned back from the tip end of the root side portion to the outer side in the width direction. This form is the side gathers 60 of the surface contact type, but it is also possible to adopt the side gathers 60 of the line contact type that are not folded outward in the width direction. Furthermore, both ends of the main body part 66 in the front-rear direction are set as undulated parts 67, and the undulated parts 67 are fixed to the side surface of the top sheet 30 in an undulated state. On the other hand, the front-rear direction of the body part 66 The middle portion in the front-rear direction between the two ends is set as a non-fixed free portion 68, and the corrugated elastic member 63 along the front-rear direction LD is fixed to the free portion 68 in an extended state.

As the pleated non-woven fabric 62, a non-woven fabric that is soft and excellent in uniformity and concealment, such as spunbonded non-woven fabrics (SS, SSS, etc.), SMS non-woven fabrics (SMS, SSMMS, etc.), and melt-blown non-woven fabrics, can be suitably used. For those obtained after water-repellent treatment with silica or the like, the mass per unit area of the fiber is preferably about 10 to 30 g/m ² . As the corrugated elastic member 63, a rubber thread or the like can be used. When the elastic fiber rubber thread is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation during fixation is preferably 150 to 350%, more preferably 200 to 300%. Also, as shown in the figure, the waterproof membrane 64 can be interposed between the corrugated non-woven fabric 62 folded into two layers. In this case, the corrugated non-woven fabric 62 can also be partially omitted in the existing portion of the waterproof membrane 64, but for the purpose of The appearance and cloth-like touch must be as shown in the figure, and at least the corrugated non-woven fabric 62 must be used to form the outer surface from the base end to the tip end of the side pleats 60.

The number of corrugation elastic members 63 provided in the free part of the side corrugations 60 is preferably 2-6, more preferably 3-5. It is appropriate for the arrangement interval 60d to be 3 to 10 mm. According to this structure, in the range where the wrinkle elastic member 63 is arrange|positioned, it becomes easy to contact the skin on a surface. The corrugated elastic member 63 may be provided not only on the tip side but also on the root side.

In the free portion 68 of the side gathers 60, the bonding of the inner layer and the outer layer of the corrugated nonwoven fabric 62 and the fixation of the corrugated elastic member 63 sandwiched between the inner layer and the outer layer can be achieved by heat At least one of the various application methods of the fusion bonding agent, and the fixing means of material welding such as heat sealing and ultrasonic sealing are performed. Since the entire surface bonding of the inner layer and the outer layer of the corrugated nonwoven fabric 62 is not conducive to flexibility, it is preferable that the parts other than the bonded portion of the corrugated elastic member 63 are not bonded or bonded weakly. The structure shown in the figure uses a comb-type spray gun or rubber band nozzle coating method to apply hot melt adhesive to only the outer peripheral surface of the corrugated elastic member 63 and sandwich the corrugated non-woven fabric 62 Between the inner layer and the outer layer of the corrugated elastic member 63, only the hot melt adhesive that has been applied to the outer peripheral surface of the corrugated elastic member 63 is used to implement the corrugated elastic member 63 relative to the inner and outer layers of the corrugated non-woven fabric 62 Layer fixation, and fixation between the inner layer and outer layer of the corrugated non-woven fabric 62.

In addition, the fixing of the waterproof membrane 64 and the wrinkle non-woven fabric 62 assembled in the side folds 60, or the fixing of the lodging portion 67 to the side surface of the inner body 200, can also be achieved by various types of hot melt adhesives. At least one of the coating method and the fixing means of material welding such as heat sealing and ultrasonic sealing are performed. In the illustrated form, the waterproof membrane 64 is fixed by slot coating of a hot melt adhesive. In addition, a combination of hot-melt adhesive and means based on material welding is used to fix the lodging portion 67 in the form shown in the figure, but it is also possible to perform the fixation by only any one of the means.

The fixing target of the root portion 65 of the side gathers 60 can be an appropriate member such as the top sheet 30, the liquid-impermeable sheet 11, and the absorbent member 50 in the inner body 200.

In the side gathers 60 of the first structure constructed as above, although the contraction force of the gather elastic member 63 is used to bring the front and rear ends close to each other, the front and rear ends of the body portion 66 are It is fixed so as not to stand up. On the other hand, it is made as a non-fixed free part between the front and back ends, so only the free part can stand up as shown in FIG. 3 and contact the body side. In particular, if the root portion 65 is located on the back side of the inner body 200, the side folds 60 stand up in a manner splaying outward in the width direction at the crotch and its vicinity, so the side folds 60 will be flat The way abuts around the legs to improve fit.

The size of the side gathers 60 of the first structure can be appropriately determined. In the case of a paper diaper for infants and toddlers, for example, as shown in FIG. 3, the standing height of the side gathers 60 (the widthwise length of the body portion 66 in the unfolded state) ) W6 is preferably 15 to 60 mm, particularly preferably 20 to 40 mm. In addition, when the side wrinkles 60 are parallel to the surface of the top sheet 30 and folded into a flat state, the separation distance W3 between the folds located on the innermost side is 60 to 190 mm, particularly preferably 70 to 140 mm.

Although the side gathers 60 of the first structure includes only three-dimensional gathers, it may include both three-dimensional gathers and flat gathers, or may include only flat gathers. Figures 12 and 13 show the side folds 60 of the second structure, which include both three-dimensional folds and plane folds. Each side wrinkle 60 has: a first portion 61 (planar wrinkle portion), which is fixed from the root portion 65 on the side on the back side than the liquid-impermeable sheet 11 in the inner body 200 to The lateral direction of the inner body 200 protrudes; and, the second portion 69 (three-dimensional corrugated portion), which is fixed from the root portion 65 of the two sides of the top sheet 30 in the inner body 200 to the inner body 200 The surface side protrudes. In more detail, the belt-shaped corrugated nonwoven fabric 62 having the same length as the length of the inner body 200 in the front-rear direction extends from the root portion 65 in the lateral direction and is folded back toward the surface side at the tip of the first portion 61, The portion that has been turned back to the surface side reaches the second portion 69 via the first portion 61 and is turned back at the tip of the second portion 69. In the folded part of the corrugated nonwoven fabric 62, the opposed part is joined by a hot melt adhesive or the like. In addition, the both ends of the second part 69 in the front-rear direction are set as the undulating part 67, and the undulating part 67 is fixed to the side surface of the top sheet 30 in a falling state. On the other hand, the front and back of the second part 69 The middle portion in the front-rear direction between the two ends of the direction is set as a non-fixed free portion 68. At least the middle part of the first part 61 in the front-rear direction and the free part 68 of the second part 69 are fixed in a stretched state, or a plurality of wrinkles in the front-rear direction LD are fixed at intervals in the width direction WD The elastic member 63, with its contraction force, causes the free portion 68 of the second part 69 to contract in the front-rear direction LD and becomes a three-dimensional wrinkle that contacts the legs; and the first part 61 is contracted in the front-rear direction LD and becomes Touch the flat folds around the legs.

The other contents of the second structure, such as the material of the corrugated nonwoven fabric 62 and the material of the corrugated elastic member 63, are the same as those of the first structure, so the description is omitted.

(Absorbent member) The absorbent member 50 has an absorbent body 56 and a packaging sheet 58 covering the entire absorbent body 56. The packaging sheet 58 can also be omitted.

(Absorber) The absorber 56 can be formed by an aggregate of fibers. As this fiber assembly, in addition to the accumulation of short fibers such as cotton-like pulp and synthetic fibers, it is also possible to use a long fiber assembly, which is a tow (fiber bundle) of synthetic fibers such as cellulose acetate as required. It is obtained by opening. The mass per unit area of the fiber can be set to about 100 to 300 g/m ² when cotton-like pulp or short fibers is piled up, and it can be set to about 30 to 120 g/m ² when it is an aggregate of long fibers. .

The absorber 56 may also have a rectangular shape, as shown in Figs. 1 and 7, if the structure is located at the front end, the rear end and between them, and has a narrower width than the front end and the rear end. The hourglass shape of the part 56N improves the fit of the absorber 56 itself and the wrinkles 60 to the legs and is better.

(Super absorbent polymer particles) A part or all of the absorber 56 can contain superabsorbent polymer particles. The so-called superabsorbent polymer particles include "powder" in addition to "particles". As superabsorbent polymer particles, they can be directly used in such disposable diapers.

(Packaging sheet) When the packaging sheet 58 is used, as the material, tissue paper, especially creped paper, non-woven fabric, polyethylene laminated non-woven fabric, sheet with small holes, etc. can be used. Among them, it is desired that the superabsorbent polymer particles do not leak out. When using non-woven fabrics instead of crepe paper, it is particularly preferable to use hydrophilic SMS non-woven fabrics (SMS, SSMMS, etc.). The material can be polypropylene, polyethylene/polypropylene composite materials, etc. The mass per unit area is desirably 5 to 40 g/m ² , and particularly desirably 10 to 30 g/m ² .

(Exterior body) The exterior bodies 12F, 12B are composed of the front exterior body 12F that constitutes the front body F, and the rear exterior body 12B that constitutes the rear body B. The front exterior body 12F and the rear exterior body 12F 12B, there is no continuity on the underside of the crotch, and it is divided in the front-rear direction LD (exterior two-part type). This separation distance 12d can be set to about 150 to 250 mm, for example. In addition, as shown in FIGS. 14 and 15, the exterior body 12 may be formed as an exterior body that extends from the front body F through the crotch and continues to one body of the back body B (exterior integrated type).

The exterior bodies 12F and 12B have a range in the front-rear direction corresponding to the waist area T, that is, the waist. In addition, in the present form, the front exterior body 12F does not have a portion corresponding to the middle region L, but the rear exterior body 12B has a buttocks cover C extending from the waist region T to the middle region L side. Although not shown, the front exterior body 12F may also be provided with a groin cover extending from the waist area T to the middle area L side, or it may be provided in a form in which only the groin cover is provided without the buttocks cover. It may also be provided that there is no part corresponding to the middle region L on both the front exterior body 12F and the rear exterior body 12B. In addition, in the illustrated form, although the lower edge of the buttocks cover portion C is formed linearly along the width direction WD like the lower edge of the front exterior body 12F, it can also be provided so as to go outward in the width direction. The curve near the waist opening.

As shown in FIGS. 4 and 5, the exterior bodies 12F and 12B are formed by joining the outer sheet layer 12S and the inner sheet layer 12H by joining means such as hot melt adhesive or welding. The sheet forming the outer sheet layer 12S and the sheet forming the inner sheet layer 12H may be separate sheets in addition to the common sheet as shown in FIG. 5. That is, in the former case, the inner sheet layer 12H and the outer sheet layer 12H and the outer sheet are respectively formed by the inner part and the outer part of a sheet folded at the edge of the waist opening WO (or the edge under the crotch). Layer 12S. In addition, in the former form, there is an advantage that the number of sheet materials is small; in the latter form, there is an advantage that the inner sheet layer 12H and the outer sheet layer 12S are not easily shifted when they are bonded together.

As the sheet used for the outer sheet layer 12S and the inner sheet layer 12H, although there are no particular restrictions on use, non-woven fabrics are preferred. When non-woven fabrics are used, the mass per unit area is preferably 10-30 g/m ² .

(Stretching area/non-stretching area) In order to improve the fit for the waist of the wearer on the outer body 12F, 12B, an elongated elastic member 15-19 such as a rubber thread is provided between the outer sheet layer 12S and the inner sheet layer 12H to form an accompanying elastic The expansion and contraction area of the member elastically expands and contracts in the width direction WD. In this stretch area, in the natural length state, the outer sheet layer 12S and the inner sheet layer 12H contract with the contraction of the elastic member to form wrinkles or wrinkles. If they stretch in the longitudinal direction of the elastic member, the outer sheet The layer 12S and the inner sheet layer 12H can be stretched to a predetermined elongation rate that is completely stretched without wrinkles. As the elastic members 15-19, synthetic rubber may be used, or natural rubber may be used.

For the bonding of the outer sheet layer 12S and the inner sheet layer 12H in the exterior bodies 12F and 12B, or the fixing of the elastic members 15 to 19 sandwiched therebetween, various coating methods of hot melt adhesives, and At least one of the fixing means such as heat sealing or ultrasonic sealing is performed by welding materials. If the entire surfaces of the exterior bodies 12F and 12B are firmly fixed, it is not good for flexibility. Therefore, it is preferable that the parts other than the bonding parts of the elastic members 15 to 19 are not bonded or bonded weakly. The structure shown in the figure uses coating means such as comb spray gun or rubber band nozzle coating. Only the outer peripheral surface of the elastic members 15-19 is coated with hot melt adhesive and two layers 12S are sandwiched. , 12H, by which only the hot-melt adhesive that has been applied to the outer peripheral surface of the elastic members 15-19 is used to fix the elastic members 15-19 relative to the two layers 12S, 12H, and the two layers Fixed between 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 in the expansion and contraction direction in the expansion and contraction region.

In more detail, a plurality of waist elastic members 17 are attached to the outer sheet layer 12S and the inner side at the waist W of the exterior bodies 12F, 12B in a manner continuous across the entire width direction WD at intervals in the vertical direction. Between slices 12H. In addition, among the waist elastic members 17, one or a plurality of pieces arranged in the area adjacent to the waist lower portion U may overlap with the inner body 200, or may exclude those that overlap with the inner body 200 The central part in the width direction is respectively provided on both sides in the width direction. As this waist elastic member 17, it is preferable that the thickness of about 3-22 pieces is 155 to 1880 dtex, especially about 470 to 1240 dtex (this is the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially about 0.1～1.0mm ² ) rubber thread is arranged at an interval of 4～12mm. Based on this arrangement, the elongation of the waist W in the width direction WD is 150～400%, particularly preferably 220～ About 320%. In addition, the waist W does not need to be provided with the same thickness of the waist elastic member 17 or the same elongation in the entire front and rear direction LD. For example, the thickness and elongation of the elastic member are at the upper and lower parts of the waist W. Can be set to different.

In addition, between the outer sheet layer 12S and the inner sheet layer 12H at the waist lower portion U of the exterior bodies 12F and 12B, a plurality of elongated elastic members are installed at intervals in the vertical direction. Elastic member 15,19.

As the lower waist elastic members 15, 19, it is preferable to have a thickness of about 5 to 30 dtex of 155 to 1880 dtex, particularly 470 to 1240 dtex (this is the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is The rubber thread of 0.05～1.5mm ² , especially 0.1～1.0mm ² ), is arranged at an interval of 1～15mm, especially an interval of 3～8mm. Based on this arrangement, the lower waist U is elongated in the width direction WD The rate is 200 to 350%, particularly preferably about 240 to 300%.

In addition, between the outer sheet layer 12S and the inner sheet layer 12H at the buttocks cover portion C of the rear exterior body 12B, a plurality of shields composed of elongated elastic members are installed at intervals in the vertical direction. Shield elastic member 16.

As the mask portion elastic member 16, it is preferable to have a thickness of about 2-10 pieces of 155-1880 dtex, especially about 470-1240 dtex (this is the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05- 1.5mm ² , especially about 0.1 to 1.0mm ² ) rubber thread, set at 5-40mm intervals, especially 5-20mm intervals, based on this setting, the elongation of the mask part in the width direction WD is 150 ~300%, particularly preferably about 180-260%.

When a groin mask is provided on the front exterior body 12F, a mask elastic member can be provided in the same manner.

As shown in the lower waist portion U and the buttocks mask portion C in the illustrated form, when the elastic members 15, 16, 19 are provided in the front and back direction range with the absorber 56, in order to prevent the The contraction of the absorber 56 in the width direction WD is set in the middle of the width direction (preferably including the whole of the inner and outer joints 201) including part or all of the portion overlapping with the absorber 56 in the width direction WD. It is a non-stretching area A1, and its widthwise sides are set as a stretchable area A2. It is preferable to make the waist W over the entire width direction WD as the stretchable area A2, but like the waist lower portion U, a non-stretchable area A1 may be provided in the middle of the width direction.

The stretchable area A2 and the non-stretchable area A1 can be formed by the following method: the elastic members 15-17, 19 are supplied between the inner sheet layer 12H and the outer sheet layer 12S, and the hot melt adhesive is used to form The elastic members 15, 16, 19 are fixed to at least both ends in the expansion and contraction direction in the expansion and contraction area A2, and the elastic members 15, 16, 19 are not fixed in the area that becomes the non-stretching area A1, and are in the non-expansion area A1. In the area in the middle of the width direction, the elastic members 15, 16, 19 are cut by pressing and heating, or almost the elastic members 15, 16, 19 are pressed and heated. The whole is cut finely, thereby maintaining the stretchability in the stretchable area A2 and eliminates the stretchability in the non-stretching area A1. In the former case, as shown in FIG. 4, in the non-stretchable area A1, the remaining part of the cut continuously from the elastic members 15, 16, 19 of the stretchable area A2 becomes the redundant elastic member 18. The redundant elastic member 18 In the state of being individually contracted to its natural length, it remains between the outer sheet layer 12S and the inner sheet layer 12H; in the latter case, although not shown, the elastic members 15, 16, 19 of the stretch area A2 continue The remaining part of the cut and the cut pieces of the elastic members that are discontinuous with the elastic members 15, 16, and 19 of the elastic region A2 on both sides become redundant elastic members, and these redundant elastic members are individually contracted to their natural length It remains between the outer sheet layer 12S and the inner sheet layer 12H.

In the shorts-type disposable diaper of the outer two-part split type, since the inner body 200 between the front outer body 12F and the rear outer body 12B is exposed, there is a gap between the front outer body 12F and the inner body 200. Up to between the rear exterior body 12B and the interior body 200, a mask nonwoven fabric 20 is provided to cover the back surface of the interior body 200 to prevent the liquid-impermeable sheet 11 from being exposed on the back surface of the interior body 200. 7 and 8, when the outer sheet layer 12S of the outer body 12 is a non-woven fabric, the outer sheet layer 12S extends from the front body F to the back body B and continuously passes under the crotch. The mask non-woven fabric 20 of the liquid-impermeable sheet 11 covering the inner body 200. The mass per unit area and the thickness of the mask nonwoven fabric 20 can be appropriately defined, and generally, the mass per unit area is 15 to 30 g/m ² and the thickness is 0.2 to 1.2 mm.

The front and rear direction range of the mask 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, and it can also be as shown in FIGS. 2, 5, 7, 9, and 10. As shown, the entire body from the front end to the rear end of the inner body 200 extends in the front-rear direction LD, or as shown in FIG. 8 from the middle position in the front-rear direction of the overlapping area of the front outer body 12F and the inner body 200 It extends in the front-rear direction LD until the middle position in the front-rear direction of the overlapping area of the rear-side exterior body 12B and the interior body 200. In the latter case, the front-to-rear length 20y of the overlapped portion of the mask nonwoven fabric 20 and the front exterior body 12F, and the front-rear length 20y of the overlapped portion of the mask nonwoven fabric 20 and the rear exterior body 12B can be appropriately specified, and usually It is set to about 5-40mm, respectively.

The width direction range of the mask nonwoven fabric 20 is set to the range which can hide the back surface exposure part of the liquid-impermeable sheet 11. Therefore, in the illustrated state, since the liquid-impermeable sheet 11 is exposed between the base ends of the left and right side gathers 60, it covers at least the base ends of the side gathers 60 from one side. The mask nonwoven fabric 20 is provided in the width direction range from the back side of the part to the back side of the base end part of the other side gather 60. Thereby, the liquid-impermeable sheet 11 can be concealed by the wrinkle non-woven fabric 62 covering the non-woven fabric 20 and the side gathers 60, and the holes 14 at both ends in the width direction of the non-woven fabric 20 can be masked when viewed from the outer surface. It will not be hidden by the wrinkled non-woven fabric 62. Also, even if the width direction both ends of the mask nonwoven fabric 20 do not cover the back sides of the base end portions of the side gathers 60, the corrugated nonwoven fabric 62 covers the back sides of both sides in the width direction of the mask nonwoven fabric 20, It is also possible to conceal the liquid-impermeable sheet 11 by using the mask non-woven fabric 20 and the corrugated non-woven fabric 62. In this case, if the total light transmittance of the corrugated non-woven fabric 62 is 60 to 90%, even if the corrugated non-woven fabric 62 is hidden The part that masks the non-woven fabric 20 and the hole 14 of the perforated non-woven fabric can also be fully recognized through perspective. Therefore, it can be recognized that the part with the air permeability enhancement function extends to the side wrinkles 60, and the visual effect of the hole 14 is sufficiently obtained To play.

>Examples of sticky disposable diapers> Figures 16 to 20 show an example of an adhesive disposable diaper. The symbol X in the figures indicates the full width of the diaper except for the fastening tape, and the symbol Y indicates the full length of the diaper. This adhesive type disposable diaper has: an absorbent body 56 extending from the abdominal side to the back side; a liquid-permeable top sheet 30 covering the surface side of the absorbent body 56; and a liquid-impermeable sheet 11 covering the absorbent The back side of the body 56; and has: end flaps EF (end flaps EF on the ventral side and end flaps EF on the back), which respectively extend from the front and rear sides of the absorbent body 56 Part, which does not have the absorber 56; and, a pair of side flap portions SF, which extend laterally from the side edge of the absorber 56. A folded part is formed along the periphery of the leg in the middle of the front and rear direction of the side flap SF, and a fastening tape 13 is respectively provided at the back side of the folded part.

The back surface of the liquid-impermeable sheet 11 is covered with a mask non-woven fabric 20. The mass and thickness per unit area of the mask nonwoven fabric 20 can be appropriately determined, but it is preferable that the mass per unit area is 15 to 30 g/m ² and the thickness is 0.2 to 1.2 mm. Mask non-woven fabric 20, which extends to the periphery of the diaper; liquid impermeable sheet 11, which extends in the front and rear direction to the front and rear edges of the diaper, and extends in the width direction to the side edges of the absorbent body and the side edges of the exterior sheet However, the mask non-woven fabric 20 can also extend only in a part of the front-rear direction, only a part of the width direction, or a part of the front-rear direction and a part of the width direction as needed. For example, when a part of the liquid-impermeable sheet 11 is covered with another material such as a corrugated non-woven fabric, the part can also be made into a form in which the mask non-woven fabric 20 is not provided.

The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, and have dimensions larger than the absorbent member 50 in the front and rear direction and the width direction. The top sheet 30 is exposed from the side edge of the absorbent member 50 The peripheral edge of the liquid-impermeable sheet 11 and the peripheral edge exposed from the side edge of the absorbent member 50 are joined by a hot melt adhesive.

Also, as in the case of a shorts-type disposable diaper, the absorbent body 56 can be made into an absorbent member packaged by a packaging sheet and sandwiched between the top sheet and the liquid-impermeable sheet, and the intermediate sheet 40 can be provided Between the topsheet and the absorbent member. Although the intermediate sheet 40 in the form shown in the figure is shorter than the width of the absorbent member 50 and is arranged at the center, it may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the total length of the diaper, or the length of the absorbent member 50 may be the same, or may be within a relatively short length centered on the region that receives (absorbs) liquid. Furthermore, as in the case of a shorts-type disposable diaper, an indicator can be provided which changes color when it touches the liquid component of the excrement.

Side gathers 60 are respectively provided on both sides in the width direction of the surface of the sticky disposable diaper. Each side wrinkle 60 includes: a first part 61 (planar wrinkle part), which is provided on each side flap SF; and, a second part 69 (three-dimensional wrinkle part), which is on both sides of the top sheet 30 On prominent. In more detail, a belt-shaped corrugated non-woven fabric 62 having a length equal to the full length Y of the diaper extends from the first portion 61 to the second portion 69. The corrugated non-woven fabric 62 is covered by a hot-melt adhesive in the first portion 61 It is joined to the mask non-woven fabric 20. Between these non-woven fabrics, one piece is fixed in a stretched state, or a plurality of corrugated elastic members 63 along the front-rear direction LD are fixed at intervals in the width direction WD, and the The contraction force causes the first portion 61 to contract in the front-rear direction LD and become a flat wrinkle around the contact leg. In addition, the pleated nonwoven fabric 62 has the first portion 61 as the root portion, and has an extension portion extending from the root portion to the center side in the width direction WD, and at least this extension portion is folded back at the tip to form a two-layer structure . In addition, the two ends of the extension in the front-rear direction LD are set as the falling portions 67 fixed to the top sheet 30. On the other hand, the middle part of the front-rear direction LD is located between the two ends of the extension in the front-rear direction LD. It is set as a non-fixed free portion 68. In the free portion 68, one piece of corrugated elastic member 63 along the front-rear direction LD is fixed in an extended state or at intervals in the width direction WD, and the contraction force of the second portion 69 The free portion 68 contracts in the front-rear direction LD and becomes a three-dimensional wrinkle around the contact leg.

The fastening tape 13 in the illustrated form has: a sheet base material, which constitutes a belt attachment portion 13C fixed to the side of the diaper, and a belt body portion 13B protruding from the belt attachment portion 13C; and, The locking portion 13A on the ventral side is provided in the middle portion of the belt main body portion 13B in the width direction of the sheet base material; among them, the side closer to the tip end than the locking portion 13A is set as a gripping portion. The belt mounting portion 13C of the fastening tape 13 is sandwiched between the corrugated non-woven fabric 62 constituting the inner layer and the mask non-woven fabric 20 constituting the outer layer in the side flap portion, and is bonded to it by a hot melt adhesive The corrugated non-woven fabric 62 and the mask non-woven fabric 20 are on. In addition, the locking portion 13A is joined to the inner surface of the belt main body portion 13B by an adhesive.

As the locking portion 13A, a hook member (male member) of a mechanical fastener (hook-and-loop fastener) is suitably used. The hook has a plurality of engaging protrusions on the outer surface side. As the shape of the engagement protrusion, there are (A) Japanese "レ" shape, (B) J shape, (C) mushroom shape (D) T shape, (E) double J shape (J shape) The engaging protrusions are combined back to back), etc., but can be any shape. Of course, an adhesive material layer can also be provided as the locking portion of the fastening tape 13.

In addition, as the sheet base material formed from the belt mounting portion 13C to the belt main body portion 13B, nonwoven fabric, plastic film, polyethylene laminated nonwoven fabric, paper, or a composite material of these can be used.

When the diaper is worn, in a state where the side flap SF on the back side is overlapped to the outside of the side flap SF on the ventral side, the fastening tape 13 is locked in an appropriate place on the outer surface of the ventral side. It is possible to arbitrarily specify the position and size of the locking position of the fastening band 13.

It is preferable that a target piece 24 is provided at the locking position of the fastening band 13 on the ventral side, and the target piece 24 has a target that can be easily locked. In the case where the locking portion 13A is a hook, a film-type target can be suitably used as the target 24, the target 24 has a film layer and an engagement layer provided on the entire outer surface of the film layer, The hook of the locking portion 13A can be detachably locked to the locking layer. As the engaging layer in this case, in addition to the type in which a mesh body woven of silk threads and an engaging layer with a loop structure is mounted on the film layer, there are also intermittent super Acoustic sealing is used to install a non-woven fabric layer of thermoplastic resin on the film layer, and make the fibers of the non-woven fabric into a loop shape. In addition, by embossing the non-woven fabric layer of thermoplastic resin, it is possible to use a filmless type target tape (sheet) without a film layer. These target tapes are combined with the fastening tape 13 by wrapping or hooking the loop of the hook of the fastening tape 13.

When the locking portion 13A is an adhesive material layer, it is possible to use a fastening tape whose adhesive-rich surface is formed by applying a peeling treatment to the surface of a sheet substrate made of a smooth plastic film.

Also, when the locking portion of the fastening tape 13 on the ventral side is made of non-woven fabric, for example, when the mask non-woven fabric 20 of the illustrated form is made of non-woven fabric, the locking portion 13A of the fastening tape 13 is a hook. In the case of the non-woven fabric, the target piece 24 can be omitted, and the hook can be wound and locked on the non-woven fabric covering the non-woven fabric 20. At this time, the target sheet 24 may be provided between the mask non-woven fabric 20 and the liquid-impermeable sheet 11.

>Perforated non-woven fabric> The mask 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, so it is desired to improve the air permeability. Therefore, the mask non-woven fabric 20 is preferably a perforated non-woven fabric provided with a plurality of holes 14 penetrating the front and back surfaces (front and back) at intervals. Although not shown, in order to improve air permeability, the top sheet 30 can be made into a perforated nonwoven fabric, and the corrugated nonwoven fabric 62 can also be made into a perforated nonwoven fabric.

In consideration of the effect of improving the air permeability, it is preferable to provide holes 14 throughout the non-woven fabric 20 of the mask as shown in FIGS. 7 and 8. However, as shown in FIG. 14, the hole 14 etc. may be formed only in the middle area|region of the front-back direction of the mask nonwoven fabric 20 which does not have the elastic members 15-18, and may have a part of the area|region without the hole 14. On the other hand, in the aforementioned adhesive-type disposable diaper, as shown in FIG. 17, holes 14 can be formed over the entire front and rear direction and width direction of the mask nonwoven fabric 20. In addition, in the aforementioned two-part outer shorts type disposable diaper, as shown in FIGS. 2 and 8, the formation area of the hole 14 is desirably continuous from the part of the mask nonwoven fabric 20 overlapping the front outer body 12F to A portion overlapping with the rear exterior body 12B.

The planar shape (opening shape) of each hole can be appropriately defined. In addition to the long hole shape shown in Figure 21 (b) and Figure 22 (b), it can also be set to a perfect circle as shown in Figure 21 (e), (f) and Figure 22 (e), such as 21(a), (d) and 22(a), (d), (f) shown in any shape such as ellipse, triangle, rectangle, rhombus and other polygons, star shape, cloud shape, etc. As shown in FIG. 21(c) and FIG. 22(c), holes 14 of different shapes may be mixed. The size of each hole 14 is not particularly limited, but the CD direction size (the longest part size) 14L is preferably 0.6 to 5.0 mm, particularly preferably 0.7 to 2.0 mm; the MD direction size (the longest part size) 14W is more It is preferably 0.6 to 5.0 mm, particularly preferably 0.6 to 1.2 mm. When the shape of the hole 14 is a long hole shape, an oval shape, a rectangle, a rhombus shape, etc., which is long in one direction (a shape whose full length in one direction is longer than the full length in the direction orthogonal to it), the MD direction The size (the size of the longest part) is preferably 1.2 to 2.5 times the maximum size of the orthogonal CD direction size (the size of the longest part). In addition, when the shape of the hole 14 is a shape that is long in one direction, it is desirable that the longitudinal direction of the hole 14 is the MD direction of the nonwoven fabric, but it may be the CD direction or an oblique direction inclined with respect to these directions. In addition, in most cases, the MD direction of the nonwoven fabric is equivalent to the width direction WD in the outer body 12 of the shorts-type disposable diaper, and is equivalent to the front-rear direction LD in the inner body 200 of the shorts-type disposable diaper. The part other than the fastening tape in the adhesive disposable diaper becomes the front-rear direction LD.

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

The planar arrangement of the holes 14 may be appropriately determined, and may also be irregular, pattern or text-like, but it is preferably a regularly repeated planar arrangement. For example, as shown in Figure 21 (a), (c), (d), the planar arrangement of all the holes 14 is preferably a row of holes arranged in a straight line at predetermined intervals in the CD direction, and in the MD direction Lines and columns repeated at predetermined intervals. At this time, in addition to arranging the interval 14x in the MD direction of the hole 14 to be shorter than the interval 14y in the CD direction of the hole 14, as shown in FIG. 21(a), it is also possible to arrange the hole 14 The interval 14x in the MD direction of the hole 14 and the interval 14y in the CD direction of the hole 14 are arranged almost equal, or as shown in FIG. 21(d), the interval 14x in the MD direction of the hole 14 may be arranged more than the CD direction of the hole 14. The interval of 14y is longer. Furthermore, as shown in Figure 21 (b) and (e), rows 91 and 92 of holes arranged in a straight line at predetermined intervals in the CD direction can be arranged so as to be spaced apart in the MD direction and in the CD direction. Position offset. In the example shown in FIG. 21(b), the arrangement of the holes 14 in the adjacent hole rows 91 and 92 is different from each other, that is, the arrangement is staggered (hexagonal lattice). In addition, as shown in FIG. 21(f), as long as there is a continuous portion in the CD direction between adjacent hole rows 91 and 92, the planar arrangement of the holes 14 also includes The center lines in the direction of, are arranged in a wavy line, and also include rows of holes 14 arranged at intervals in the direction orthogonal to the MD direction, and are arranged at intervals in the MD direction.

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

The CD-direction interval 14y and the MD-direction interval 14x of the holes 14 may be individually fixed or changed. These can be determined appropriately, but if the air permeability is taken into consideration, it is desirable to set the CD direction interval 14y of the holes 14 in the range of 0.9 to 8.0 mm, particularly preferably in the range of 1.0 to 3.0 mm. The MD direction interval 14x of the holes 14 is set in the range of 2.0 to 10.0 mm, and is particularly preferably set in the range of 3.0 to 5.0 mm. In particular, if the rows of holes 14 arranged in the CD direction at intervals 14y in the CD direction are repeated at predetermined intervals in the MD direction, the CD direction intervals 14y are narrower than the CD direction dimension 14L of the holes 14, and the MD The directional interval 14x is wider than the CD dimension 14L of the hole 14 (further, more preferably more than 3 times the MD dimension 14W of the hole 14), the air permeability is significantly improved without impairing the softness and bulkiness, and, The tensile strength of the sheet material in the MD direction, which is important at the time of manufacture, does not decrease, so it is preferable. Particularly in this case, it is preferable to make the shape of the hole 14 an elongated shape in the CD direction.

In addition, the plane arrangement of the holes 14 except for the group 90 of holes 14 that can be arranged in a continuous wave shape in the MD as shown in Figure 22 (a) to (d) and (f), in the CD direction In addition to arranging at intervals on the upper side, the group 90 of holes 14 arranged at intervals in the MD to be continuous in a chain shape can also be arranged at intervals 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 of the holes 14 arranged in a ring shape are repeated at intervals in the MD direction. For example, as shown in FIG. 22(e), the peak The group 90 of the holes 14 arranged in two waves in the opposite direction are arranged at intervals in the CD direction, or can be formed in a chain shape as shown in FIG. 23. Here, "the groups 90 of holes 14 are arranged at intervals in the CD direction" means that the groups 90 of holes 14 adjacent to each other in the CD direction have straightly continuous holes along the MD direction.孔部93。 Hole portion 93.

The arrangement shape in the group 90 of the holes 14 can be appropriately defined, as long as the wave shape is as described above, except that the valleys of the arc curve as shown in FIG. 22(a) can be continuously formed in a repeated wave shape, as shown in FIG. 22 Except for the triangular wave shape shown in (b), the rectangular wave shape shown in FIG. 22(d), the sinusoidal shape like the group 90 of the hole 14 in the middle section of FIG. 22(f), etc., although It is not shown that it can be a shape in which at least one of the amplitude and the wavelength changes regularly or irregularly, and other irregular shapes.

The interval 14x in the MD direction of the holes 14 in the group 90 of the holes 14 may be fixed or variable, and can be appropriately defined. In consideration of the improvement of air permeability by the holes 14, it is desirable to set it in the range of 2.0 to 10 mm, and it is particularly preferable to set it in the range of 3.0 to 5.0 mm.

In addition, the interval 14y in the CD direction of the holes 14 in the row 94 of each hole 14 may be changed as shown in the example shown in FIG. 22(d), or may be as shown in FIGS. 22(a) and (b). Generally fixed. The interval 14y of the holes 14 in the CD direction in the row 94 of the holes 14 is desirably in the range of 0.9 to 8.0 mm, and particularly preferably in the range of 1.0 to 3.0 mm. In addition, compared to the interval 14x in the MD direction of the holes 14 in the row 94 of the holes 14, the interval 14y in the CD direction of the holes 14 in the row 94 of the holes 14 may be relatively long or the same degree, but it is desirable to be Relatively short (about 2 to 5 times).

The cross-sectional shape of the hole 14 is not particularly limited. For example, the hole 14 may be a punched hole with a peripheral edge formed by cutting the fiber end, or it may be a cut end with almost no fiber at the peripheral edge of the hole 14, and a plug pin is inserted between the fibers to push and expand The formed non-punched hole (high fiber density at the edge). In the punch-type hole, the diameter of the hole 14 may decrease as it approaches the middle of the thickness direction as shown in FIG. 24(d). Although not shown, it may decrease as it approaches one side in the thickness direction.

In the non-punch type hole 14, the diameter of the hole 14 decreases from the plug insertion side to the opposite side. Among them, the diameter of the hole 14 not only continuously decreases throughout the entire thickness direction of the non-woven fabric layer, but also includes that the diameter of the hole 14 is almost no longer reduced in the middle of the thickness direction. This kind of non-punched hole includes a protrusion (burr) 14e formed on the edge of the hole 14 on the side opposite to the plug insertion side as shown in Figs. 24(a) and (c). The protrusion 14e It is the fiber that is pushed to the side opposite to the plug insertion side, and the protrusion 14e is not formed on the plug insertion side; and, as shown in FIG. 24(b), the edge of the hole 14 on the side opposite to the plug insertion side The portion is formed with a protrusion 14e that is pressed to the side opposite to the plug insertion side of the fiber, and a protrusion 14e is formed on the plug insertion side, and the protrusion 14e is pressed to the plug insertion side Formed by fibers. Further, the hole 14 of the former type includes the protrusion height 14h of the protrusion 14e shown in FIG. 24(a) which is almost uniform; and, the protrusion 14e as shown in FIG. 24(c) has the highest facing portion The protruding height 14i and the protruding height 14j of the lowest opposing portion that are opposed in the direction orthogonal to the protruding height 14i. It is desirable that the protruding portion 14e is continuously cylindrical in the circumferential direction of the hole, but a part or all of the protruding portion 14e of the hole 14 may be formed only in the circumferential direction of a part of the hole 14. It is preferable that the protrusion heights 14h, 14i, and 14j (the height of the appearance measured using an optical microscope in a state where no pressure is applied) are about 0.2 to 1.2 mm. Moreover, in the protrusion 14e, it is preferable that the highest protrusion height 14i is about 1.1 to 1.4 times the lowest protrusion height 14j. The protrusion height of the protrusion 14e may also vary in the circumferential direction of the hole 14.

For example, if a hole 14 having a shape elongated in one direction as shown in Figure 21 (a), (b), (d), etc., is formed by inserting a plug, the fiber at the edge of the hole 14 will retract to the outside Or a protrusion (burr) 14e is formed in the vertical direction, and the protrusion height 14i of the opposing portion in the longitudinal direction of the hole 14 is higher than the protrusion height 14j of the opposing portion in the direction orthogonal to the longitudinal direction. The protrusion 14e of the hole 14 may also have a lower fiber density than the surrounding part, but it is preferably the same degree or higher.

In particular, when the perforated non-woven fabric has a fineness of 0.1 to 5.0 dtex (especially 1.0 to 3.0 dtex), a mass per unit area of 15 to 25 g/m ² (particularly preferably 15 to 18 g/m ² ) and In the case of a long-fiber nonwoven fabric having a thickness of 0.3 to 0.8 mm (particularly preferably 0.3 to 0.6 mm), if the hole 14 is formed by insertion of a plug, the protrusion 14e formed at the edge of the hole 14 becomes lower. In more detail, in the case of the long-fiber nonwoven fabric in the above-mentioned specific range, when a hole is formed by inserting a plug, the fiber is not easily pushed in the thickness direction. This is because the fiber to which the force is applied by the insertion of the plug is continuously wound (continuous fiber) throughout the entire non-woven fabric, and the movement of the fiber in the portion where the force is applied by the insertion of the plug is because it is connected to it. The outer part is suppressed. Furthermore, the long-fiber nonwoven fabric in the above-mentioned specific range basically has a suitably low fiber density, so the movement of the fibers is relatively easy to be directed in a direction orthogonal to the thickness direction. As a result, if the plug is inserted into the long-fiber non-woven fabric of the specified range to form the hole 14 of the size of the specified range, when the plug is inserted, the fibers near the plug are pushed to the center of the insertion direction of the plug. In the radial direction, one side moves toward the plug outlet side, so although the protrusion 14e is formed, its height becomes low. Furthermore, for this reason, a high-density portion having a higher fiber density than the surrounding area is formed at the edge portion of the hole 14. Furthermore, with this high-density portion, the periphery of the hole and the shadow of the hole become stronger, which has the advantage of improving the identification of the hole.

>Adhesive non-woven fabric with holes> The perforated nonwoven has an exposed surface exposed to the outside and a supporting surface on the opposite side, and can be bonded to other sheets facing the supporting surface through a hot melt adhesive 20H (when the perforated nonwoven is a mask nonwoven 20 , The other sheets are liquid-impermeable sheets 11). The bonding pattern is not particularly limited, but it is preferable that the bonding structure of the mask non-woven fabric 20 and the liquid-impermeable sheet 11 as shown in FIG. 11 is closer to the center than the peripheral portion 14c of the area overlapping the hole 14 There is no hot-melt adhesive 20H on the side, and a continuous-surface hot-melt adhesive 20H exists outside the peripheral edge portion 14c of the region overlapping with the hole 14. Since there is no hot-melt adhesive 20H on the central side of the peripheral portion 14c of the area overlapping with the hole 14, it is not easy to produce a sticky skin feel due to the hot-melt adhesive 20H, and it can be firmly fixed The protrusion 14e of the hole 14.

As a representative bonding state, as shown in Figure 11 (a) and (b), there is no hot-melt adhesive 20H in the area overlapping the hole 14, and there is a continuous surface outside the area overlapping the hole 14. The state of the hot-melt adhesive 20H in shape; as shown in Figure 11(c) and (d), although the hot-melt adhesive 20H is exposed to the peripheral portion 14c of the area overlapping with the hole 14, it is more than the hole 14 There is no hot-melt adhesive 20H on the peripheral edge portion 14c of the overlapped area further to the center, and a continuous surface hot-melt adhesive 20H exists outside the peripheral edge portion 14c of the area overlapping the hole 14. In addition, the exposed width of the hot-melt adhesive 20H in the peripheral edge portion 14c of the region overlapping with the hole 14 is preferably not more than half the thickness of the perforated nonwoven fabric, and is about 0.5 mm or less. In addition, it is desirable that the hot-melt adhesive 20H does not exist in a portion of 80% or more of the area of the area overlapping with the hole 14. Such an adhesive structure can be formed by the method described in Patent Document 4.

>Whiteness of perforated nonwoven fabric> As shown in the example of the mask nonwoven fabric 20, in the perforated nonwoven fabric with an exposed surface exposed to the outside, when the thickness is 0.30～1.5mm, and the minimum size of the hole 14 (refers to the size in the MD direction and the size in the CD direction The shorter one is the diameter in the case of a circle.) When the whiteness of the exposed surface in the perforated nonwoven fabric is 70% or more when it is 0.6 to 5mm, the whiteness of the part outside the hole 14 Since the degree is high, the difference between the shadows generated on the outer part of the hole 14 and the edge of the hole 14 becomes large, and the hole 14 can be easily recognized.

Especially preferably, the thickness of the perforated non-woven fabric is 0.35 to 1.2 mm. Moreover, it is particularly preferable that the minimum size of the holes 14 of the perforated nonwoven fabric is 0.60 to 1.2 mm. Furthermore, it is particularly preferable that the whiteness of the exposed surface of the perforated nonwoven fabric is 73% or more, and more preferably 80% or more.

Although it is possible to increase the density in order to increase the whiteness of the perforated nonwoven fabric, it will not only increase the cost but also decrease the softness. Therefore, for the porous nonwoven fabric, it is preferable to set the fineness of the constituent fibers to 1.8 to 6.0 dtex, and to set the mass per unit area to about 15 to 25 g/m ² , and to appropriately contain white pigments such as titanium oxide To make up for the lack of whiteness. As a nonwoven fabric that satisfies such conditions and has sufficient strength, a perforated nonwoven fabric formed by forming holes in a spunbonded nonwoven fabric is suitable.

If the whiteness of the perforated non-woven fabric is too high, it should be placed on the part that overlaps the back side of the perforated non-woven fabric, such as other sheets facing the supporting surface of the perforated non-woven fabric (when the perforated non-woven fabric as shown in the example is a mask non-woven fabric At 20 o'clock, the other sheet is the liquid-impermeable sheet 11), and it may not be easy to see this display when it is printed with a display that can be seen from the outer surface of the perforated non-woven fabric through the perforated non-woven fabric. Therefore, it is preferable that the whiteness of the perforated nonwoven fabric is 85% or less. In addition, the indication refers to the design used for decoration (including the character of a picture or a pattern (one point)), the method of use, the use of auxiliary functions, the size, etc., or the manufacturer's product name, characteristic function, etc. Displays etc. are made by attaching appropriate members by printing etc.

The whiteness of the other sheets facing the support surface of the perforated nonwoven fabric (when the perforated nonwoven fabric is the mask nonwoven fabric 20 as shown in the example, the other sheet is the liquid impermeable sheet 11) is not particularly limited, but the whiteness of the other sheet The surface on the side of the perforated nonwoven fabric is a portion exposed through the holes 14. Therefore, if the whiteness of at least the non-colored portion of the surface on the side of the porous nonwoven fabric in the other sheet is 70% or more, and more preferably 80% or more, the high whiteness portion The inside of the hole 14 is exposed, whereby the difference between the shadow generated on the inside of the hole 14 and the edge of the hole 14 becomes larger, and the hole can be more easily recognized. In addition, other sheets facing the support surface of the perforated non-woven fabric may sometimes be printed with the above-mentioned indication, and sometimes the whiteness of the colored part used for this indication may not exceed 70%. However, the hole 14 overlapping the colored portion has a colored portion as a background to improve visibility. Therefore, by increasing at least the whiteness of the non-colored portion (non-printed portion), the visibility of the entire hole 14 can be improved.

>Effect confirmation test> Using the various mask non-woven fabrics shown in Table 1, the inner body 200 having the structure shown in Figs. 1 to 7 was manufactured, and the good degree of the visibility of the holes 14 of the mask non-woven fabric 20 was evaluated as: ◎... Recognition hole, ○...the hole can be identified, ×...the three stages in which the hole is assimilated to the surrounding and difficult to be identified. The evaluation results are shown in Table 1. The method for measuring the whiteness of the mask nonwoven fabric 20 and the liquid-impermeable sheet 11 is as described above. In addition, when performing the whiteness measurement in this test, a simple spectrophotometer NF333 manufactured by Nippon Denshoku Industry Co., Ltd. was used, and it was used at 5 locations on the same measurement surface (in the case of the liquid-impermeable sheet 11, it is white). The non-colored portion with the highest degree) was measured, and the average value (N=5) was obtained. In addition, the minimum size of the hole 14 of the mask non-woven fabric was measured with a microscope in its natural length.

As shown in Table 1, in sample 5 and sample 6 with a whiteness of less than 70%, and sample 7 with a whiteness of 70% or more but the minimum size of the hole is less than 0.6 mm, the holes are assimilated to the surroundings and become difficult to identify result. On the other hand, samples 1 to 4 in which the whiteness is 70% or more and the minimum size of the hole is 0.6 mm or more have good results for the recognition of the hole.

[Table 1] Sample number 1 2 3 4 5 6 7 8 9 Mask non-woven Visual color White White White White White White White White White Types of non-woven fabrics Spunbond Spunbond Hot air Hot air Spunbond Spunbond Spunbond Hot air Hot air Non-woven material PP PP PE (sheath)/ PET (core) PE (sheath)/ PET (core) PP PP PP PE (sheath)/ PET (core) PE (sheath)/ PET (core) Mass per unit area (g/m ² ) 17 18 20 25 15 17 17 twenty three twenty two Minimum size of hole (mm) 0.7 0.7 0.8 0.7 0.5 0.7 0.5 0.4 0.5 The shape of the hole Figure 22(f) Figure 21(e) Figure 21(e) Figure 21(e) Figure 22(f) Figure 22(f) Figure 22(f) Figure 22(f) Figure 22(d) Arrangement of holes Figure 23 Figure 21(a) Figure 21(a) Figure 21(a) Figure 23 Figure 23 Figure 23 Figure 21(f) Figure 21(b) Thickness(mm) 0.40 0.48 0.85 1.16 0.38 0.40 0.40 0.86 0.71 BaiDu(%) 85.0 73.3 83.9 84.4 63.9 67.1 84.9 84.4 86.1 Liquid impermeable tablets BaiDu(%) 85.9 85.9 85.9 85.9 85.9 85.9 85.9 85.9 85.9 The appearance of the hole (identification) ◎ ○ ◎ ◎ × × × × × (Note) In the table, PP refers to polypropylene, PE refers to polyethylene, and PET refers to polyethylene terephthalate.

>Explanation of terms in the manual> As long as there is no special description in the specification, the following terms in the specification have the following meanings.

・The "front-rear direction" refers to the direction (longitudinal direction) indicated by the symbol LD in the figure, and the "width direction" refers to the direction (left-right direction) indicated by the symbol WD in the figure, and the front-rear direction is orthogonal to the width direction.

・"MD direction (Machine Direction)" and "CD direction" refer to the flow direction (MD direction) and the transverse direction (CD direction) orthogonal to it in the manufacturing equipment. Either one is the front-rear direction and the other is the width direction. In addition, the MD direction of the non-woven fabric is the direction in which the fibers of the non-woven fabric are oriented. The fiber orientation refers to the extending direction of the fibers of the non-woven fabric. Technical Association of the Pulp and Paper Industry (Technical Association of the Pulp and Paper Industry) standard method T481 zero distance tensile strength fiber orientation test method, and determine the fiber based on the ratio of the tensile strength in the front and rear direction and the width direction A simple method of measuring the direction of orientation is used to determine fiber orientation.

・"Front side" refers to the side close to the wearer's skin when wearing shorts disposable diapers; "back side" refers to the side that is far away from the wearer's skin when wearing shorts disposable diapers One side.

・"Surface" refers to the side of the component that is close to the wearer's skin when wearing a shorts-type disposable diaper; "back" refers to the side of the component, which when wearing a shorts-type disposable diaper, Keep away from the wearer's skin.

・"Area rate" refers to the ratio of the target part to the unit area, and is expressed as a percentage by dividing the total area of the target part (for example, holes) in the target area (for example, masking non-woven fabric) by the area of the target area ratio. In a form in which a large number of target parts are provided at intervals, it is desirable to set the target area with a size including 10 or more target parts and obtain the area ratio. For example, the area ratio of the holes can be measured by using a device under the trade name of KEYENCE Corporation VHX-1000, and the measurement condition is set to 20 times, using the following procedure. (1) Set a 20x lens and adjust the focal length. Adjust the position of the non-woven fabric in a way that 4×6 holes appear. (2) Specify 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 "Measure together", tick (check) "Display measurement results", and save as CSV (Comma Separated Values) data.

・"Elongation" refers to the value when the natural length is set to 100%. For example, the elongation rate of 200% means the same meaning that the elongation rate is 2 times.

・"Gel strength" is measured by the following method. In 49.0 g of artificial urine (combining 2wt% urea, 0.8 wt% sodium chloride, 0.03 wt% calcium chloride dihydrate, 0.08 wt% magnesium sulfate heptahydrate, and 97.09 wt% ion exchange water Mixed) Add 1.0g of super absorbent polymer and stir with a stirrer. After the gel is placed in a constant temperature and humidity tank of 40℃×60%RH (Relative Humidity) for 3 hours, it returns to normal temperature and uses a curd meter (manufactured by I. technoEngineering: Curdmeter-MAX). ME-500) to determine the gel strength.

・"Mass per unit area" is measured in the following way. After pre-drying the sample or test piece, place it in a test room or device in a standard state (temperature of the test site is 23±1°C, relative humidity is 50±2%) to make it a constant weight (constant weight) status. Preliminary drying refers to making the sample or test piece a constant weight in an environment with a temperature of 100°C. Furthermore, for fibers with a legal moisture content of 0.0%, preliminary drying is not necessary. From the test piece in a constant weight state, using a template (100mm×100mm) for sample collection, a sample with a size of 100mm×100mm was cut out. Measure the weight of the sample and multiply it by 100 to calculate the weight per square meter as the mass per unit area.

・"Thickness" is automatically measured using an automatic thickness measuring device (KES-G5 portable compression measuring program) under the conditions of a load of 0.098gf/cm ² and a pressurized area of 2cm ² . The thickness of the perforated non-woven fabric is measured using parts other than the holes and the surrounding protrusions.

・Water absorption is measured according to JIS K7223-1996 "Test Method for Water Absorption of Super Absorbent Resin".

・The water absorption rate is the "time to end point" when JIS K7224-1996 "Test Method for Water Absorption Rate of Super Absorbent Resin" is carried out using 2 g of super absorbent polymer and 50 g of physiological saline.

・"Expanded state" refers to a state in which it is unfolded flat without shrinking or slack.

・The dimensions of each part, unless otherwise stated, refer to the dimensions in the unfolded state, not the natural length state.

‧"Melt viscosity" is measured at the set temperature in accordance with the Japanese Industrial Standards JIS Z 8803, using Brookfield B-type viscometer (Spindle No.027 (model)).

・In the absence of a description of the environmental conditions in the test or measurement, the test or measurement is performed in a test room or device in a standard state (the temperature of the test site is 23±1°C, the relative humidity is 50±2%) ongoing.

[Industrial availability] The present invention can be used in all types of disposable wear such as shorts-type disposable diapers and adhesive-type disposable diapers, as well as pad-type disposable diapers, disposable swimwear, diaper covers, sanitary napkins, etc. article.

11: Liquid-impermeable tablets 12: Exterior body 12A: Side seal 12B: Rear exterior body 12F: Front exterior body 12d: The separation distance between the front exterior body and the rear exterior body 12H: inner layer 12S: Outer layer 13: Fastening strap 13A: Locking part 13B: With main body 13C: With mounting part MD direction: flow direction in manufacturing equipment CD direction: horizontal direction orthogonal to MD direction 14: hole 14c: The peripheral edge of the area overlapping with the hole 14e: protrusion 14h, 14i, 14j: protrusion height 14x: the interval of the hole in the MD direction 14y: the interval of the hole in the CD direction 14W: MD dimension of hole 14L: CD dimension of hole 15: Elastic member under waist 16: elastic member of the mask 17: Waist elastic member 18: Extra elastic member 19: Elastic member under waist 20: Masking non-woven fabric 20H: Hot melt adhesive 20y: The length of the overlapped part of the mask non-woven fabric and the exterior body 24: Target 30: Top piece 40: Intermediate piece (second piece) 50: Absorbent member 56: Absorber 58: Packaging film 60: Side folds 61: The first part of pleated nonwoven fabric 62: pleated non-woven fabric 63: pleated elastic member 60d: Arrangement interval of corrugated elastic members 64: waterproof membrane 65: root part 66: body part W3: The separation distance between the innermost creases W6: Standing height of side folds 67: Lodging part 68: free part 69: The second part of pleated non-woven fabric 91, 92: A row of holes arranged in a straight line at predetermined intervals in the CD direction 93: Non-porous part 94: column of holes 200: inner body 201: Inside and outside junction A1: Non-stretching area A2: Telescopic area LO: leg opening WO: Waist opening LD: front and rear direction L: Middle area T: Waist area W: waist U: Lower waist C: Buttocks cover WD: width direction B: Back body (back part) F: Predecessor (ventral part) SF: Flank EF: end wings X: The full width of the diaper in the unfolded state Y: The full length of the diaper in the unfolded state 56X: The full width of the absorber 56N: Hourglass shape 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-9, 10, 10: Section line

Fig. 1 is a plan view showing the inner surface of the shorts-type disposable diaper in an unfolded state. Fig. 2 is a plan view showing the outer surface of the shorts-type disposable diaper in an unfolded state. Fig. 3 is a sectional view taken along line 2-2 in Fig. 1. Fig. 4 is a sectional view taken along line 3-3 in Fig. 1. Fig. 5(a) is a cross-sectional view taken along line 4-4 in Fig. 1; and Fig. 5(b) is a cross-sectional view taken along line 5-5 in Fig. 1. Fig. 6 is an oblique view of a shorts-type disposable diaper (illustration of holes is omitted). Fig. 7 is a plan view showing the outer surface of the inner body in an unfolded state. Fig. 8 is a plan view showing the outer surface of the inner body and the outline of the outer body in an expanded state. Fig. 9 is a plan view showing the outer surface of the shorts-type disposable diaper in an unfolded state. Fig. 10(a) is a cross-sectional view taken along line 4-4 in Fig. 9; and Fig. 10(b) is a cross-sectional view taken along line 5-5 in Fig. 9. Figure 11 (a) is a cross-sectional view of the bonded portion of the mask non-woven fabric; Figure 11 (b) is a plan view of the bonded portion of the mask non-woven fabric; Figure 11 (c) is a cross-sectional view of the bonded portion of the mask non-woven fabric; Fig. 11(d) is a plan view of the bonded portion of the mask nonwoven fabric. Fig. 12 is a cross-sectional view along line 2-2 in Fig. 1 showing another form. Fig. 13 is a cross-sectional view along line 3-3 in Fig. 1 showing another form. Fig. 14 is a plan view showing the outer surface of the shorts-type disposable diaper in an unfolded state. Fig. 15(a) is a cross-sectional view taken along line 4-4 in Fig. 14; and Fig. 15(b) is a cross-sectional view taken along line 5-5 in Fig. 14. Fig. 16 is a plan view showing the inner surface of the sticky disposable diaper in an unfolded state. Fig. 17 is a plan view showing the outer surface of the sticky disposable diaper in an unfolded state. Fig. 18 is a cross-sectional view along line 6-6 in Fig. 16. Fig. 19 is a cross-sectional view taken along line 7-7 in Fig. 16. Fig. 20(a) is a cross-sectional view taken along line 8-8 in Fig. 16; Fig. 20(b) is a cross-sectional view taken along line 9-9 in Fig. 16; and Fig. 20(c) is a cross-sectional view taken along line 9-9 in Fig. 16 Sectional view of line 10-10. Fig. 21 is an enlarged plan view of important parts showing various patterns of holes of the perforated nonwoven fabric. Fig. 22 is an enlarged plan view showing important parts of various patterns of holes of the perforated nonwoven fabric. Fig. 23 is an enlarged plan view showing important parts of the chain-like pattern of holes of the perforated nonwoven fabric. Figure 24 is various cross-sectional views of the perforated nonwoven fabric.

Domestic hosting information (please note in the order of hosting organization, date and number) no

Foreign hosting information (please note in the order of hosting country, institution, date and number) no

12A: Side seal

12B: Rear exterior body

12F: Front exterior body

14: hole

15: Elastic member under waist

16: elastic member of the mask

17: Waist elastic member

19: Elastic member under waist

56: Absorber

200: inner body

LD: front and rear direction

L: Middle area

T: Waist area

W: waist

U: Lower waist

C: Buttocks cover

WD: width direction

B: Back body (back part)

F: Predecessor (ventral part)

X: The full width of the diaper in the unfolded state

Y: The full length of the diaper in the unfolded state

56X: The full width of the absorber

Claims (7)

A disposable wearing article that has a perforated non-woven fabric with a plurality of holes penetrating the front and back surfaces at intervals; The aforementioned perforated non-woven fabric has an exposed surface exposed to the outside and a supporting surface facing other sheets; The characteristics of the disposable wearing article are: The thickness of the aforementioned perforated nonwoven fabric is 0.30～1.5mm, The minimum size of the aforementioned hole is 0.6～5mm, The whiteness of the exposed surface in the perforated nonwoven fabric is 70% or more. The disposable wearing article according to claim 1, wherein the porous non-woven fabric is a non-woven fabric containing a white pigment, the fineness of the constituent fibers is 1.8 to 6.0 dtex, and the mass per unit area is 15 to 25 g/m ² . The disposable wearing article according to claim 1 or 2, wherein the portion of the nonwoven fabric that overlaps the hole on the side opposite to the exposed surface is printed so as to pass through the exposed surface of the porous nonwoven fabric It’s a sign of seeing through the perforated nonwoven, The whiteness of the aforementioned perforated nonwoven fabric is 85% or less. The disposable wearing article according to any one of claims 1 to 3, wherein the whiteness of at least the non-colored portion on the surface of the perforated nonwoven fabric side in the other sheet is 70% or more. The disposable wearing article according to any one of claims 1 to 4, comprising: an absorber; a liquid-impermeable sheet that covers the back side of the absorber and has air permeability; and a non-woven mask, It covers the back side of this liquid-impermeable sheet; The aforementioned mask non-woven fabric is the aforementioned perforated non-woven fabric, and the aforementioned liquid-impermeable sheet is the aforementioned other sheet. The disposable wearing article according to any one of claims 1 to 5, wherein the holes are arranged at intervals in either of the front-to-rear direction and the width direction, so that the holes are arranged at intervals in the other Arranged in one direction at intervals, The spacing of the holes in one of the directions 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 to 5, wherein the holes are arranged in a continuous wave shape or chain shape in either the front-to-rear direction and the width direction. The groups of holes are arranged at intervals in the other direction, The arrangement of the holes is a row of holes arranged at intervals in the other direction and arranged at intervals in one of the directions, In the row of the holes, the interval in the other direction of the holes is 1.0 to 5.0 mm, The interval of the holes in the hole group in one of the directions is 2.5 to 10.0 mm.

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