Disposable wearable article and method of manufacturing same

Abstract

To provide a disposable wearable article having excellent rash prevention effects.SOLUTION: A disposable wearable article comprises a top sheet including a skin contact area coming into contact with a skin of a wearer, a second sheet and an absorption element in this order. The disposable wearable article is characterized in that the top sheet is a nonwoven fabric with the basis weight of 5-40 g / m2, a first body fluid permeable treatment agent having the HLB value of 8-16 and containing a non-ionic surfactant with an amide group is applied to at least the skin contact area, a second body fluid permeable treatment agent different from the first body fluid permeable treatment agent, having the HLB value of 2.0-11.0 is applied to the second sheet, and a glycerin-containing area is formed by applying the glycerin to the area to which the first body fluid permeable treatment agent has been applied, of the top sheet.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a disposable wearing article such as a disposable diaper or a sanitary napkin, and a method for manufacturing the same. [Background technology]

[0002] Disposable wearable articles, particularly disposable diapers, often cause skin irritation, especially rashes, which can be caused by physical irritation to the wearer's skin (friction and hardness) and a decrease in the barrier function of the skin due to dryness.

[0003] It is also known to apply a hydrophilic lotion to a top sheet made of a nonwoven fabric to reduce friction, etc. (see Patent Document 1). A hydrophilic lotion is preferable because it can prevent the hardness of the wax-like substance and the decrease in liquid permeability. In particular, a hydrophilic lotion containing water is preferable to prevent the skin from drying out.

[0004] However, there is still room for improvement in terms of preventing diaper rash. For example, the skin of infants is sensitive, and so-called diaper rash is likely to occur in diapers worn by infants. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2010-526630 [Patent Document 2] JP 2018-178331 A Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, a primary object of the present invention is to provide a disposable wearing article which is excellent in preventing the wearer from developing a rash, and a method for producing the same. [Means for solving the problem]

[0007] A disposable wearing article and a method for manufacturing the same that solve the above problems are described below.

[0008] <First Form> The garment comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element in this order; The top sheet has a basis weight of 5 to 40 g / m 2 and a first body fluid permeability treating agent is applied to at least the skin contact area, the first body fluid permeability treating agent having an HLB value of 8 to 16 and including a nonionic surfactant having an amide group; A second body fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first body fluid permeability treating agent is applied to the second sheet, Glycerin is applied to the area of ​​the top sheet to which the first body fluid permeability treating agent is applied, thereby forming a glycerin-containing area. A disposable wearing article characterized by:

[0009] <Second Form> The garment comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element in this order; The top sheet has a basis weight of 5 to 40 g / m 2 It is a laminated nonwoven fabric of a first bodily fluid permeability treating agent having an HLB value of 8 to 16 and containing a nonionic surfactant having an amide group is applied to at least the skin contact area of ​​the surface of the top sheet that contacts the wearer's skin; a second bodily fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to a surface of the top sheet opposite to the surface that contacts the wearer's skin, Glycerin is applied to the area of ​​the top sheet to which the first body fluid permeability treating agent is applied, thereby forming a glycerin-containing area. A disposable wearing article characterized by:

[0010] <Third Form> The garment comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element in this order; The top sheet has a basis weight of 5 to 40 g / m 2 It is a laminated nonwoven fabric of a first bodily fluid permeability treating agent having an HLB value of 8 to 16 and containing a nonionic surfactant having an amide group is applied to at least the skin contact area of ​​the surface of the top sheet that contacts the wearer's skin; a second bodily fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to a surface of the top sheet opposite to the surface that contacts the wearer's skin, A third bodily fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to the second sheet, Glycerin is applied to the area of ​​the top sheet to which the first body fluid permeability treating agent is applied, thereby forming a glycerin-containing area. A disposable wearing article characterized by:

[0011] <Fourth Form> In the manufacture of a disposable wearing article having a top sheet having a skin contact area that contacts the skin of a wearer, The top sheet has a basis weight of 5 to 40 g / m 2 It is a nonwoven fabric, A body fluid permeability treating agent containing a nonionic surfactant having an HLB value of 8 to 16 and having an amide group is applied to the nonwoven fabric, Applying glycerin to the area to which the fluid-permeable treatment agent is applied; The method for producing a disposable wearing article is characterized in that Effect of the Invention

[0012] The present invention provides the following advantages: excellent rash prevention effect. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a plan view showing the inner surface of the tape-type disposable diaper in an unfolded state. [Diagram 2] FIG. 2 is a plan view showing the outer surface of the tape-type disposable diaper in an unfolded state. [Diagram 3] 6 is a cross-sectional view taken along line 6-6 of FIG. 1. [Figure 4] This is a cross-sectional view taken along line 7-7 in FIG. [Diagram 5] 1. (a) is a cross-sectional view taken along line 8-8 in FIG. 1, (b) is a cross-sectional view taken along line 9-9 in FIG. 1, and (c) is a cross-sectional view taken along line 10-10 in FIG. [Figure 6] 1A to 1C are plan views showing various examples of hole arrangement patterns of a perforated nonwoven fabric. [Figure 7] FIG. 2 is a plan view showing an example of an arrangement pattern of holes in a perforated nonwoven fabric (Moroccan pattern). [Figure 8] FIG. 2 is a plan view showing an example of an arrangement pattern (chain pattern) of holes in a perforated nonwoven fabric. [Figure 9] FIG. 2 is a cross-sectional view of a hole portion of a perforated nonwoven fabric. [Figure 10] FIG. 2 is a plan view showing the inner surface of the tape-type disposable diaper in an unfolded state. [Figure 11] FIG. 2 is a plan view showing the inner surface of the tape-type disposable diaper in an unfolded state. [Figure 12] FIG. 2 is a plan view for explaining a test specimen. [Figure 13] FIG. [Figure 14] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] One embodiment that solves the above problem is: The garment comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element in this order; The top sheet has a basis weight of 5 to 40 g / m 2 and a first body fluid permeability treating agent is applied to at least the skin contact area, the first body fluid permeability treating agent having an HLB value of 8 to 16 and including a nonionic surfactant having an amide group; A second body fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first body fluid permeability treating agent is applied to the second sheet, Glycerin is applied to the area of ​​the top sheet to which the first body fluid permeability treating agent is applied, thereby forming a glycerin-containing area. The disposable wearing article is characterized in that

[0015] Another embodiment is The garment comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element in this order; The top sheet has a basis weight of 5 to 40 g / m 2 It is a laminated nonwoven fabric of a first bodily fluid permeability treating agent having an HLB value of 8 to 16 and containing a nonionic surfactant having an amide group is applied to at least the skin contact area of ​​the surface of the top sheet that contacts the wearer's skin; a second bodily fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to a surface of the top sheet opposite to the surface that contacts the wearer's skin, Glycerin is applied to the area of ​​the top sheet to which the first body fluid permeability treating agent is applied, thereby forming a glycerin-containing area. The disposable wearing article is characterized in that

[0016] Also, another embodiment is The garment comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element in this order; The top sheet has a basis weight of 5 to 40 g / m 2 It is a laminated nonwoven fabric of a first bodily fluid permeability treating agent having an HLB value of 8 to 16 and containing a nonionic surfactant having an amide group is applied to at least the skin contact area of ​​the surface of the top sheet that contacts the wearer's skin; a second bodily fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to a surface of the top sheet opposite to the surface that contacts the wearer's skin, A third bodily fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to the second sheet, Glycerin is applied to the area of ​​the top sheet to which the first body fluid permeability treating agent is applied, thereby forming a glycerin-containing area. The disposable wearing article is characterized in that

[0017] Further, an embodiment of the method for manufacturing a disposable wearing article includes: In the manufacture of a disposable wearing article having a top sheet having a skin contact area that contacts the skin of a wearer, The top sheet has a basis weight of 5 to 40 g / m 2 a first body fluid permeability treating agent containing a nonionic surfactant having an HLB value of 8 to 16 and an amide group is applied to at least the skin contact area; A second bodily fluid permeability treating agent having an HLB value of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to the second sheet, applying glycerin to the area of ​​the top sheet to which the first body fluid permeability treating agent has been applied to form the glycerin-containing area; The present invention relates to a method for producing a disposable wearing article.

[0018] By applying glycerin to a skin contact area that comes into contact with the wearer's skin (meaning an area that is exposed on the surface of the disposable wearing article in an unfolded state), the glycerin exerts a friction reducing effect. Furthermore, the glycerin contained in the top sheet is transferred to the wearer's skin, thereby moisturizing (preventing dryness) the wearer's skin (particularly by penetrating into the stratum corneum). Therefore, the resulting disposable wearing article is highly compatible in both reducing physical irritation to the wearer's skin and moisturizing the wearer's skin, and is particularly effective in preventing rashes. Here, "glycerin is applied" does not mean glycerin alone, but means that something containing water and other components and mainly made of glycerin is applied.

[0019] The HLB value of the nonionic surfactant (a value that indicates the degree of affinity of a surfactant for water and oil (organic compounds that are insoluble in water). The HLB value according to the Oda method described below is preferably 8 to 16, particularly 9.5 to 14. Body fluids, typically loose stools and menstrual blood, contain water and oil. Therefore, it is desirable for the material to have good affinity for body fluids and to easily transmit the body fluids to the absorbent element. Therefore, from the viewpoint of having good affinity for body fluids, the HLB value is desirably 8 to 16, particularly 9.5 to 14.

[0020] On the other hand, body fluids contain oil as well as water. Although water dominates, oil is also present in no small amount. For glycerin, it is desirable to use a nonionic surfactant (first body fluid permeability treating agent) having a sufficient affinity for water and an HLB value of, for example, 8 to 16. However, since body fluids also contain oil, it is desirable to apply a second body fluid permeability treatment agent that is different from the first body fluid permeability treatment agent, which has an HLB value of 2.0 to 11.0 and shows affinity for oil, and preferably has a lower HLB value than the first body fluid permeability treatment agent, to increase the permeability to both water and oil.

[0021] One application of the second body fluid permeability treatment agent is to use a laminated nonwoven fabric as the top sheet, with the first body fluid permeability treatment agent applied to the surface that comes into contact with the wearer's skin, and the second body fluid permeability treatment agent applied to the surface opposite the surface that comes into contact with the wearer's skin. The second sheet is in contact with the rear surface of the top sheet as a whole, at least when in use. Therefore, another application form of the second bodily fluid permeability treating agent may be a form in which the second bodily fluid permeability treating agent is applied to the second sheet. Although dual application of a second bodily fluid permeability treatment agent to the side of the laminated nonwoven fabric opposite to the side that contacts the wearer's skin, as well as to the second sheet, is not excluded, this is not a preferred embodiment as it is not advantageous in terms of manufacturing cost relative to the effect.

[0022] The disposable wearing article according to the present invention includes disposable wearing articles and sanitary napkins. Hereinafter, an embodiment of the present invention will be described.

[0023] 1 to 5 show a tape-type disposable diaper as an example of a disposable wearing article. In the drawings, the symbol X indicates the overall width of the diaper excluding the connecting tape, and the symbol Y indicates the overall length of the diaper. The dotted pattern in the cross-sectional view indicates an adhesive as a joining means for joining each component member. The hot melt adhesive can be applied by known methods such as slot application, continuous line or dotted line bead application, spiral, Z-shaped, wavy, etc. spray application, or pattern coating (transfer of hot melt adhesive by letterpress method). Alternatively or in addition to this, at the fixing portion of the elastic member, the hot melt adhesive can be applied to the outer circumferential surface of the elastic member to fix the elastic member to the adjacent member. As the hot melt adhesive, for example, EVA-based, adhesive rubber-based (elastomer-based), olefin-based, polyester / polyamide-based, and other types are available, but they can be used without any particular limitation. As a joining means for joining each component member, material welding means such as heat sealing and ultrasonic sealing can also be used.

[0024] In addition, as the nonwoven fabric in the following description, known nonwoven fabrics can be appropriately used depending on the part and purpose. The constituent fibers of the nonwoven fabric can be selected without particular limitation from synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, polyamides, etc. (including single-component fibers and composite fibers such as core-sheath fibers), regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc., and these can also be used in combination. In order to increase the flexibility of the nonwoven fabric, it is preferable to use crimped fibers as the constituent fibers. In addition, the constituent fibers of the nonwoven fabric can be hydrophilic fibers (including those made hydrophilic by a hydrophilizing agent), hydrophobic fibers, or water-repellent fibers (including those made water-repellent by a water-repellent agent). In addition, nonwoven fabrics are generally classified into staple fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bond (air-through) nonwoven fabrics, needle punch nonwoven fabrics, point bond nonwoven fabrics, laminated nonwoven fabrics (SSS nonwoven fabrics in which the same or similar nonwoven fabric layers are laminated, as well as SMS nonwoven fabrics and SMMS nonwoven fabrics in which different nonwoven fabric layers are laminated, in which a meltblown layer is sandwiched between spunbond layers), etc., depending on the length of the fibers, the sheet formation method, the fiber bonding method, and the laminated structure, but any of these nonwoven fabrics can be used. A laminated nonwoven fabric means a nonwoven fabric manufactured as an integrated nonwoven fabric including all layers, and fiber bonding processing is performed across all layers, and does not include a nonwoven fabric manufactured separately and bonded together by a bonding means such as a hot melt adhesive.

[0025] This tape-type disposable diaper has a ventral part F extending forward from the center in the front-rear direction LD, and a back part B extending rearward from the center in the front-rear direction LD. The shape of this tape-type disposable diaper has a crotch part M extending from the front of the center in the front-rear direction of the product to the rear of the center in the front-rear direction of the product, front wings 80 protruding on both sides at a position away from the front of the center in the front-rear direction of the product, and rear wings 81 protruding on both sides at a position away from the rear of the center in the front-rear direction of the product. Furthermore, this tape-type disposable diaper has an absorbent body 56 built into a range including the crotch part, a liquid-permeable top sheet 30 covering the front side of the absorbent body 56, a liquid-impermeable sheet 11 covering the back side of the absorbent body 56, and an exterior nonwoven fabric 12 covering the back side of the liquid-impermeable sheet 11 and constituting the outer surface of the product.

[0026] The materials and features of each part will be explained below in order. (Absorbent) The absorbent body 56 is a part that absorbs and retains excreted liquid, and can be formed by a fiber assembly. As this fiber assembly, in addition to stacked staple fibers such as cotton-like pulp and synthetic fibers, a filament assembly obtained by opening a tow (fiber bundle) of synthetic fibers such as cellulose acetate as required can also be used. When stacking cotton-like pulp or staple fibers, the fiber weight is, for example, 100 to 300 g / m 2 In the case of a filament aggregate, for example, the weight is 30 to 120 g / m 2 In the case of synthetic fibers, the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex.

[0027] The planar shape of the absorber 56 can be determined appropriately. In addition to being rectangular, it can also be a shape in which the middle part in the front-to-rear direction LD is narrowed so as to fit around the legs.

[0028] (Superabsorbent polymer particles) The absorbent body 56 may contain superabsorbent polymer particles in part or in whole. The superabsorbent polymer particles include not only "particles" but also "powders". The superabsorbent polymer particles include the following: disposable Those used in worn articles can be used as they are. The particle size of the superabsorbent polymer particles is not particularly limited, but when, for example, a 500 μm standard sieve (JIS Z8801-1:2006) is used for sieving (shaking for 5 minutes) and the particles that fall through the sieve are then sieved (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1:2006), the proportion of particles remaining on the 500 μm standard sieve is preferably 30% by weight or less and the proportion of particles remaining on the 180 μm standard sieve is 60% by weight or more.

[0029] The material of the superabsorbent polymer particles is not particularly limited, but preferably has a water absorption of 40 g / g or more. The superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based materials, and may be starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, crosslinked products of sodium carboxymethylcellulose, and acrylic acid (salt) polymers. The shape of the superabsorbent polymer particles is preferably a powder-like shape that is commonly used, but other shapes may also be used.

[0030] The highly absorbent polymer particles preferably have a water absorption speed of 70 seconds or less, particularly 40 seconds or less. If the water absorption speed is too slow, the liquid supplied into the absorbent body 56 tends to flow back out of the absorbent body 56, which is called backflow.

[0031] Moreover, the highly absorbent polymer particles preferably have a gel strength of at least 1000 Pa. This makes it possible to effectively prevent the sticky feeling after absorbing liquid, even when the absorbent body 56 is bulky.

[0032] The basis weight of the highly absorbent polymer particles can be appropriately determined according to the absorption amount required for the application of the absorbent body 56. Therefore, although it cannot be generally stated, in general, it is generally 50 to 350 g / m 2 It can be said that:

[0033] (packaging sheet) In order to prevent the superabsorbent polymer particles from escaping or to improve the shape retention of the absorbent body 56, the absorbent body 56 can be incorporated as an absorbent element 50 wrapped in a wrapping sheet 58. As the wrapping sheet 58, tissue paper, particularly crepe paper, nonwoven fabric, polylaminated nonwoven fabric, a sheet with small holes, etc. can be used. However, it is preferable that the sheet is one from which the superabsorbent polymer particles do not escape. When using nonwoven fabric instead of crepe paper, hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and the material that can be used is polypropylene, polyethylene / polypropylene, etc. The fiber basis weight is 5 to 40 g / m 2 , especially 10 to 30 g / m 2 It is preferable that the following be used.

[0034] 3, this packaging sheet 58 may be structured so that one sheet wraps the entire absorbent body 56, or multiple sheets, such as two sheets above and below, may be used to wrap the entire absorbent body 56. The packaging sheet 58 may also be omitted.

[0035] (Top sheet) The top sheet 30 extends from the front end to the rear end of the product in the front-to-rear direction, and extends laterally than the absorbent body 56 in the width direction WD; however, appropriate modifications can be made as necessary, such as making the width of the top sheet 30 shorter than the overall width of the absorbent body 56, for example, when the starting point of the rising gathers 60 described below is located closer to the center in the width direction WD than the side edges of the absorbent body 56.

[0036] The top sheet 30 has a skin contact region 30E that comes into contact with the wearer's skin, and is preferably a nonwoven fabric from the viewpoints of liquid permeability and texture. Various nonwoven fabrics can be used for the top sheet 30, but in consideration of cushioning, flexibility, permeability to soft stool (watery or muddy stool), etc., a short fiber nonwoven fabric such as an air-through nonwoven fabric is preferable to a long fiber (continuous fiber) nonwoven fabric, and typically has a fineness of 1 to 10 dtex and a basis weight of 5 to 40 g / m. 2 Especially, the weight is 10~30g / m 2 A short fiber nonwoven fabric having a thickness of about 0.4 to 1.4 mm is suitable. The fiber length of the short fiber nonwoven fabric is not particularly limited, but is preferably about 0.5 to 1.0 mm.

[0037] In order to increase the permeability of loose stool, the top sheet 30 is particularly preferably a perforated nonwoven fabric having a hole arrangement region in which holes 14 penetrating from the front to the back are arranged substantially uniformly or in a predetermined pattern. The shape, dimensions, arrangement pattern, etc. of the holes 14 can be determined appropriately. Note that in Fig. 1, for ease of viewing the drawing, the holes 14 are shown only in a portion D of the top sheet 30, but this does not indicate the hole arrangement region.

[0038] The hole arrangement region may be only in a middle region in the front-to-back direction LD of the top sheet 30, or only in a middle region in the width direction WD of the top sheet 30 (there may be a part of the region without holes 14). The hole arrangement region may be the entire top sheet 30. That is, as long as the hole arrangement region is provided in the skin contact region, it may extend to other regions (for example, regions where the gathered sheet 62 is bonded on both sides in the width direction WD).

[0039] The planar shape (opening shape) of each hole 14 can be appropriately determined. The hole 14 can be an oblong hole shape as shown in Fig. 6(a)(b), a perfect circle shape as shown in Fig. 6(c), (e), (f), Fig. 7 and Fig. 8, an ellipse shape as shown in Fig. 6(d), a polygonal shape such as a triangle, a rectangle, a rhombus, a star shape, a cloud shape, or any other shape. Although not shown, holes 14 of different shapes may be mixed. The dimensions of each hole 14 are not particularly limited, but the front-rear dimension (the dimension of the longest part) 14L is preferably 0.5 to 2.0 mm, particularly 0.5 to 2.0 mm, and the width dimension (the dimension of the longest part) 14W is preferably 0.5 to 2.0 mm, particularly 0.5 to 1.0 mm. When the shape of the holes 14 is elongated in the front-rear direction, such as an oblong hole, ellipse, rectangle, or diamond (a shape in which the total length in one direction is longer than the total length in the direction perpendicular to the former), the dimension in the front-rear direction is preferably 1.2 to 2.5 times the dimension in the width direction perpendicular to the former. When the shape of the holes 14 is elongated in one direction, the longitudinal direction of the holes 14 is preferably the MD direction of the nonwoven fabric, but may be the CD direction or a diagonal direction inclined relative to the CD direction. In many cases, the MD direction of the apertured nonwoven fabric constituting the top sheet 30 is equal to the front-rear direction LD.

[0040] The area and area ratio of the holes 14 in the hole arrangement region may be appropriately determined. 2 The area ratio is preferably about 0.1 to 10%.

[0041] The arrangement pattern of the holes 14 can be appropriately determined. For example, as shown in Fig. 6(a), (c), and (d), the arrangement pattern of the holes 14 is preferably a matrix pattern in which rows of holes 14 arranged linearly at a predetermined interval in the front-rear direction LD are repeated at a predetermined interval in the width direction WD. In this case, as shown in Fig. 6(a) and (d), the arrangement may be such that the interval 14y of the holes 14 in the front-rear direction LD is shorter than the interval 14x of the holes 14 in the width direction WD, as shown in Fig. 6(c), or the arrangement may be such that the interval 14y of the holes 14 in the front-rear direction LD is approximately equal to the interval 14x of the holes 14 in the width direction WD, as shown in Fig. 6(c), or the arrangement may be such that the interval 14y of the holes 14 in the front-rear direction LD is longer than the interval 14x of the holes 14 in the width direction WD, as shown in Fig. 6(b) and (e). Also, as shown in Fig. 6(b) and (e), the arrangement may be such that rows 95 of holes arranged linearly at a predetermined interval in the front-rear direction LD are arranged at intervals in the width direction WD and are shifted in position in the front-rear direction LD. The example shown in FIGS. 6(a) and 6(b) is a so-called staggered (hexagonal lattice) arrangement in which the arrangement of the holes 14 in adjacent hole rows 95 is staggered.

[0042] The front-rear spacing 14y and the width-wise spacing 14x of the holes 14 may be constant or may vary. These can be determined appropriately, but for example, the front-rear spacing 14y of the holes 14 can be 0.9 to 8.0 mm, particularly 1.0 to 3.0 mm, and the width-wise spacing 14x of the holes can be 2.0 to 10 mm, particularly 3.0 to 5.0 mm.

[0043] The arrangement pattern of the holes 14 may be such that, as shown in FIG. 6(f) and FIG. 7, the groups 90 of the holes 14 arranged to form a single wave shape 91, 92 continuing in the front-rear direction LD are arranged in the same phase or different phases at intervals in the width direction WD. In the example pattern shown in FIG. 7, the wave-shaped phases of the groups 90 of the holes 14 adjacent to each other in the width direction WD are in opposite phases, and the imaginary lines connecting the holes 14 form a Moroccan pattern (tachiwaku pattern). Also, as shown in FIG. 8, the groups 90 of the holes 14 arranged at intervals to form a chain shape continuing in the front-rear direction LD may be arranged at intervals in the width direction WD. Here, "the groups 90 of the holes 14 are arranged at intervals in the width direction WD" means that there is a non-hole portion 93 that is continuous in a straight line along the front-rear direction LD between the groups 90 of the holes 14 adjacent to each other in the width direction WD.

[0044] The cross-sectional shape of the hole 14 is not particularly limited. For example, the hole 14 may be a punched type hole whose periphery is formed by cut ends of fibers, or a non-punched type hole (having a high fiber density at the edge) in which there are almost no cut ends of fibers around the periphery of the hole 14 and which is formed by inserting a pin between the fibers and pushing them apart. The punched type hole may be one in which the diameter of the hole 14 becomes smaller toward the middle in the thickness direction as shown in Fig. 9(d), or one in which the diameter becomes smaller toward one side in the thickness direction (not shown).

[0045] In the non-punched type holes 14, the diameter of the holes 14 becomes smaller from the pin insertion side toward the opposite side. This includes holes 14 whose diameter continues to decrease throughout the entire thickness direction of the nonwoven fabric layer, as well as holes 14 whose diameter does not decrease at all in the middle of the thickness direction. Such non-punched type holes include holes in which a protrusion (burr) 14e is formed at the edge of the hole 14 on the opposite side to the pin insertion side by pushing fibers toward the opposite side to the pin insertion side, and no protrusion 14e is formed on the pin insertion side, as shown in Figure 9(a)(c), and holes in which a protrusion 14e is formed at the edge of the hole 14 on the opposite side to the pin insertion side by pushing fibers toward the opposite side to the pin insertion side, and a protrusion 14e is formed on the pin insertion side by pushing fibers toward the pin insertion side, as shown in Figure 9(b). Furthermore, the former type of hole 14 includes a hole in which the protruding height 14h of the protruding portion 14e is almost uniform as shown in FIG. 9(a), and a hole in which the protruding portion 14e has a facing portion with the highest protruding height 14i and a facing portion facing in a direction perpendicular to the facing portion with the lowest protruding height 14j as shown in FIG. 9(c). The protruding portion 14e is preferably cylindrical and continuous in the circumferential direction of the hole, but the protruding portions 14e of some or all of the holes 14 may be formed only in a part of the circumferential direction of the hole 14. The protruding heights 14h, 14i, and 14j (apparent heights measured with an optical microscope in a state where no pressure is applied) are preferably about 0.2 to 1.2 mm. Moreover, the highest protruding height 14i of the protruding portion 14e is preferably about 1.1 to 1.4 times the lowest protruding height 14j. The protruding height of the protruding portion 14e may vary in the circumferential direction of the hole 14.

[0046] For example, when a hole 14 long in one direction as shown in Figures 6(a), (b), (d), etc. is formed by inserting a pin, the fibers at the edge of the hole 14 are pushed outward or vertically, and a protruding part (burr) 14e is formed in which the protruding height 14i of the opposing part in the longitudinal direction of the hole 14 is higher than the protruding height 14j of the opposing part in the direction perpendicular to the longitudinal direction. The fiber density of the protruding part 14e of the hole 14 may be lower than that of the surrounding parts, but it is preferable that the fiber density is the same or higher.

[0047] In particular, the porous nonwoven fabric has a fineness of 0.1 to 5.0 dtex (more preferably 1.0 to 3.0 dtex) and a basis weight of 15 to 20 g / m 2 (More preferably 15 to 18 g / m 2 ), the thickness of the long-fiber nonwoven fabric is 0.3 to 0.8 mm (more preferably 0.3 to 0.6 mm), when holes 14 are formed by inserting pins, the protrusions 14e formed at the edges of the holes 14 are low. More specifically, in the case of a long-fiber nonwoven fabric in the above-mentioned specific range, the fibers are not easily pushed out in the thickness direction when the pin insertion holes are formed. This is because the fibers to which force is applied by inserting the pins are continuous (continuous fibers) while entangled throughout the entire nonwoven fabric, and the movement of the fibers in the part to which force is applied by inserting the pins is suppressed by the part connected to the outside. Furthermore, the long-fiber nonwoven fabric in the above-mentioned specific range basically has an appropriately low fiber density, so that the movement of the fibers in the direction perpendicular to the thickness direction is relatively easy. As a result, when a pin is inserted into the long-fiber nonwoven fabric in the above-mentioned specific range to form a hole 14 in the above-mentioned specific range of dimensions, the fibers near the pin are pushed out in the radial direction centered on the direction of pin insertion while moving toward the pin exit side when the pin is inserted, so that a protrusion 14e is formed but its height is low. This also results in a high-density portion having a higher fiber density than the surrounding area being formed at the edge of the hole 14. This high-density portion further strengthens the shadow between the hole and its surroundings, which has the advantage of improving the visibility of the hole.

[0048] (Second seat) In order to quickly transfer liquid that has permeated the top sheet 30 to the absorbent body, a second sheet (also called an "intermediate sheet") 40 that has a faster liquid permeability rate than the top sheet 30 can be provided. This second sheet 40 is intended to quickly transfer liquid to the absorbent body, improve the absorption performance of the absorbent body, and prevent the "backflow" phenomenon of absorbed liquid from the absorbent body. The second sheet 40 can also be omitted.

[0049] A liquid-permeable sheet such as a nonwoven fabric can be used as the second sheet 40. An air-through nonwoven fabric is particularly preferred as the second sheet 40 because it is bulky. A composite fiber with a core-sheath structure is preferably used for the air-through nonwoven fabric, and in this case, the resin used for the core may be polypropylene (PP), but polyester (PET) with high rigidity is preferred. The basis weight is 17 to 80 g / m 2 is preferable, and 18 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 nonwoven fabric bulky, it is also preferable to use eccentric fibers, hollow fibers, or eccentric and hollow fibers as all or part of the raw fiber mixture in order to make the nonwoven fabric bulky.

[0050] In the illustrated example, the second sheet 40 is shorter than the width of the absorbent body 56 and is disposed in the center, but it may be provided over the entire width. The second sheet 40 may be provided over the entire length of the diaper, or may be provided only in the middle part in the front-rear direction LD including the excretion position as in the illustrated example.

[0051] (Liquid-impermeable sheet) The liquid-impermeable sheet 11 is not particularly limited, but is preferably moisture-permeable. For example, a microporous sheet obtained by kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching the sheet in a uniaxial or biaxial direction can be suitably used as the liquid-impermeable sheet 11. In addition, a sheet having a nonwoven fabric as a base material and enhanced waterproofness can also be used as the liquid-impermeable sheet 11.

[0052] It is desirable that the liquid-impermeable sheet 11 extend over the same or a wider area than the absorbent 56 in the front-rear direction LD and the width direction WD, but if necessary, for example when other water-blocking means are present, it may be structured so as not to cover the ends of the absorbent 56 in the front-rear direction LD and the width direction WD.

[0053] (Exterior nonwoven fabric) The exterior nonwoven fabric 12 covers the entire back side of the liquid-impermeable sheet 11, giving the outer surface of the product a cloth-like appearance. The fiber weight of the exterior nonwoven fabric 12 is 10 to 50 g / m 2 , especially 15 to 30 g / m 2 The outer nonwoven fabric 12 may be omitted, in which case the liquid-impermeable sheet 11 may extend to the side edges of the product.

[0054] (Rising Gathers) In order to prevent excrement from moving laterally along the top sheet 30 and to prevent so-called lateral leakage, it is preferable that rising gathers 60 that rise towards the wearer's skin are provided on both sides in the width direction WD of the front surface. Of course, the rising gathers 60 can be omitted.

[0055] When the rising gathers 60 are used, the structure is not particularly limited, and any known structure can be used. The rising gathers 60 in the illustrated example are composed of a gather sheet 62 that is substantially continuous in the width direction WD, and an elongated gather elastic member 63 that is fixed to the gather sheet 62 in a stretched state along the front-rear direction LD. A water-repellent nonwoven fabric can be used as the gather sheet 62, and rubber thread or the like can be used as the gather elastic member 63. The elastic members can be provided in multiples as shown in Figs. 1 and 2, or one each.

[0056] The inner surface of the gathered sheet 62 has a joining start point in the width direction WD on the side of the top sheet 30, and the portion outward in the width direction from this joining start point is joined by a hot melt adhesive or the like to the inner surface of each side flap SF, that is, in the illustrated example, to the side of the liquid-impermeable sheet 11 and the side of the exterior nonwoven fabric 12 located outward in the width direction.

[0057] Around the legs, the widthwise center side of the joining start point of the rising gathers 60 is fixed onto the top sheet 30 at both ends in the front-to-back direction of the product, but the area therebetween is an unfixed free area, and this free area rises due to the contractile force of the elastic member 63 and comes into close contact with the surface of the body.

[0058] (end flaps, side flaps) The tape-type disposable diaper in the illustrated example has a pair of end flaps EF that do not have an absorbent body 56 and extend to the front and rear sides of the absorbent body 56, respectively, and a pair of side flaps SF that do not have an absorbent body 56 and extend laterally beyond both side edges of the absorbent body 56. The side flaps SF may be made of a main body sheet (exterior nonwoven fabric 12, etc.) that continues from the part having the absorbent body 56, as in the illustrated example, or may be formed by attaching other materials.

[0059] (Flat gather) A leg elastic member 64 made of an elongated elastic member such as rubber thread is fixed to each side flap SF in a stretched state in the front-rear direction LD, whereby the leg portion of each side flap SF is configured as a flat gather. As shown in the illustrated example, the leg elastic member 64 is provided between the gather sheet 62 and the liquid-impermeable sheet 11 on the outer side in the width direction near the joining start end of the joining portion of the gather sheet 62, and can also be provided between the liquid-impermeable sheet 11 and the exterior nonwoven fabric 12 in the side flap SF. The leg elastic member 64 can be provided in multiple pieces on each side as shown in the illustrated example, or only one piece on each side. Of course, the leg elastic member 64 (flat gather) can be omitted.

[0060] The plane gathers are the portions on which the contractile force of the leg elastic members 64 acts (portions on which the leg elastic members 64 are illustrated in the drawings). Thus, in addition to a configuration in which the leg elastic members 64 are present only in the areas of the plane gathers, a configuration in which the leg elastic members 64 are present on the front side, rear side, or both sides of the plane gathers, but the leg elastic members are cut into small pieces at one or multiple locations outside the areas of the plane gathers, or are not fixed to the sheets sandwiching the leg elastic members 64, or both, so that the contractile force of the leg elastic members 64 acts only on the areas of the plane gathers without acting on areas other than the plane gathers (effectively equivalent to no elastic members being provided).

[0061] (Front wing) This tape-type disposable diaper has front wings 80 protruding on both the left and right sides at a position away from the center of the product in the front-to-rear direction. The front wings can be omitted (i.e., the width of the product does not change from the narrowest part to the front end of the product).

[0062] The dimension of the width direction WD of the front wing 80 can be determined appropriately, but may be, for example, 5 to 20% (particularly, 7 to 15%) of the total article length L. The dimension of the width direction WD of the front wing 80 can be approximately the same as the dimension of the width direction WD of the rear wing 81 described later.

[0063] (Rear wing) This tape-type disposable diaper has rear wings 81 protruding on both the left and right sides at positions rearward away from the center of the product in the front-to-rear direction.

[0064] The dimension of the rear wing 81 in the width direction WD can be determined appropriately. In addition to being the same as the dimension of the front wing 80 in the width direction, it can also be smaller or larger than the dimension of the front wing 80 in the width direction.

[0065] (middle part) Both side edges 15 of the product between the front wing 80 and the rear wing 81 may have a substantially straight portion passing through a range of ±5 mm in a direction perpendicular to the center, centered on a direction in which the acute angle with respect to the front-to-rear direction LD is less than ±2 degrees. Both side edges 15 of the product between the front wing 80 and the rear wing 81 may be wavy or arc-shaped (not shown), or may be straight as in the illustrated example.

[0066] (Wing formation) As shown in the illustrated example, by cutting the side of the side flap SF in a concave shape, it is possible to form a concave edge extending from the lower edge of the front wing 80 through both side edges 15 of the product between the front wing 80 and the rear wing 81 to the lower edge of the rear wing 81. In this case, the laminated structure of the side flap SF determines the laminated structure of the front wing 80 and the rear wing 81, and in the illustrated example, the front wing 80 and the rear wing 81 are formed by the gathered sheet 62 and the exterior nonwoven fabric 12. Although not shown, a front extension sheet protruding laterally from the side flap SF may be provided, and the entire front wing 80 or a part of the tip side may be formed by the front extension sheet. Similarly, a rear extension sheet protruding laterally from the side flap SF may be provided, and the entire rear wing 81 or a part of the tip side may be formed by the rear extension sheet. Various nonwoven fabrics can be used as the front extension sheet and the rear extension sheet.

[0067] (Connection part) The rear wing 81 is provided with a connecting portion 13A that is detachably connected to the abdominal portion F when worn. That is, when wearing, both sides of the rear wing 81 are brought to the abdominal side of the wearer, and the connecting portion 13A of the rear wing 81 is connected to the outer surface of the abdominal portion F. The connecting portion 13A may be provided with a hook material (male material) of a mechanical fastener (hook-and-loop fastener) or may be provided with an adhesive layer. The hook material has a number of engaging protrusions on its connecting surface, and the shape of the engaging protrusions may be any known shape, such as a L shape, a J shape, a mushroom shape, a T shape, or a double J shape (a shape in which two J shapes are joined back to back).

[0068] The connecting portion 13A can be attached directly to the rear wing 81, or as shown in the illustrated example, a connecting tape 13 having a connecting portion 13A can be attached to the rear wing 81. The structure of the connecting tape 13 is not particularly limited, but in the illustrated example, it has a tape attachment portion 13C fixed to the side flap SF, a tape main body portion 13B protruding from this tape attachment portion 13C, and a connecting portion 13A provided in the middle of the tape main body portion 13B in the width direction WD, and the tip side of this connecting portion 13A forms a knob portion. The sheet material forming the area from the tape attachment portion 13C to the tape main body portion 13B can be a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper, or a composite material thereof.

[0069] The connecting points of the connecting parts 13A on the outer surface of the abdominal portion F can be appropriately determined, and may be only the main body part located between the left and right front wings 80, or may be the range from the side of the main body part to the base end side of the front wing 80. These connecting points are preferably such that the connecting parts 13A can be easily connected. For example, when the connecting parts 13A are a hook material (male material) of a mechanical fastener (hook and loop fastener), the connecting points on the outer surface of the abdominal portion F may be formed of a loop material (female material) of the mechanical fastener or a nonwoven fabric. As a loop material, a plastic film with loop thread sewn thereto is known, but a long-fiber nonwoven fabric (fineness 2.0 to 4.0 dtex, basis weight 20 to 50 g / m2) with the fibers continuing in the width direction WD is also suitable. 2 From the viewpoint of breathability and flexibility, a nonwoven fabric (such as a spunbonded nonwoven fabric having a thickness of about 0.3 to 0.5 mm) having welded portions at least in the width direction WD where fibers are welded to each other intermittently is preferred. When the region including the connecting portion on the outer surface of the abdominal portion F is formed of the exterior nonwoven fabric 12 as in the illustrated example, the hook material can be connected to the exterior nonwoven fabric 12 without adding anything. If necessary, a loop material may be attached only to the connecting portion on the outer surface of the abdominal portion F. Also, when the connecting portion 13A is an adhesive layer, a plastic film having a smooth surface and high adhesiveness can be attached to the connecting portion on the outer surface of the abdominal portion F.

[0070] (Fixing the top sheet) The top sheet 30 is preferably bonded to a backing member arranged on the back side of the top sheet 30 via a hydrophobic hot melt adhesive 31. Alternatively, or in addition, the top sheet 30 may be joined to a backing member arranged on the back side thereof by welding at least one of the top sheet 30 and the backing member arranged on the back side thereof. The top sheet 30 fixing region may extend to other regions (e.g., the entire top sheet 30) as long as it extends to at least the entire hole arrangement region, or may be only the hole arrangement region. In the illustrated example, the backing members are the second sheet 40, the packaging sheet 58, and the liquid-impermeable sheet 11, but are not limited thereto.

[0071] As the hydrophobic hot melt adhesive 31, EVA-based, olefin-based, polyester / polyamide-based, etc. can be used, and adhesive rubber-based (elastomer-based) adhesives can be particularly preferably used.

[0072] The amount of the hydrophobic hot melt adhesive 31 to be applied can be determined as appropriate, but in general, it is 0.1 to 10 g / m 2 In particular, the amount of application of the hydrophobic hot melt adhesive 31 is preferably about 0.5 to 5 g / m. 2 A thickness of about 100 mm is preferable because it can prevent the hot melt adhesive 31 from spilling out of the holes 14, but it is desirable to combine it with some modification of the glycerin application pattern, etc., because adhesion inhibition by glycerin, which will be described later, is likely to occur. The application pattern of the hydrophobic hot melt adhesive 31 can be determined as appropriate, and a dense pattern with minute non-coated areas scattered therein (spiral, Z-shaped, wavy, or other such spray application) is preferable, but a continuous planar application pattern such as slot application may also be used.

[0073] (Prevents rashes) The skin contact area where the wearer's skin may come into contact with the skin of the top sheet 30, in this embodiment, is the skin contact area 30E between the side edges of the rising gathers 60 when the rising gathers 60 are in the raised state (the area exposed on the surface of the article in the unfolded state), which is an area where a rash may occur when the disposable wearing article is worn.

[0074] A body fluid permeability treatment agent, which is a nonionic surfactant described below, is applied in advance to the entire top sheet 30, preferably the entire skin contact area 30E, or at least to the glycerin-containing area 32 where glycerin is applied and the glycerin is contained in the top sheet 30.

[0075] (Glycerin-containing region) The skin contact region 30E of the top sheet 30 contains 0.7 to 2.7 g / m glycerin as shown in, for example, Figs. 7, 10, and 11. 2 The glycerin-containing region 32 may be provided in one location over a relatively large area, or in multiple locations. As long as the glycerin-containing region 32 is provided in the skin contact region 30E of the top sheet 30, it may or may not be provided in other regions.

[0076] The dimensions, arrangement, etc. of the glycerin-containing region 32 can be determined as appropriate. However, it is not preferable that the dimensions of the glycerin-containing region are too small. It is preferable that one glycerin-containing region 32 has a dimension 32L in the MD direction (in the illustrated example, the front-rear direction LD) of 5 mm or more and a dimension 32W in the CD direction (in the illustrated example, the width direction WD) of 5 mm or more. The dimension 32L in the MD direction of the glycerin-containing region 32 is more preferably 30 mm or more, even more preferably 50 mm or more, and particularly preferably 100 mm or more. The upper limit of the dimension 32L in the MD direction of the glycerin-containing region 32 is the total length Y of the product, but it may be shorter than this. The dimension 32W in the CD direction of the glycerin-containing region 32 is more preferably 10 mm or more. The upper limit of the dimension 32W in the CD direction of the glycerin-containing region 32 is the dimension in the width direction WD of the top sheet 30, but it may be shorter than this.

[0077] Furthermore, if the area of ​​the glycerin-containing regions 32 in the skin contact region 30E is too small, the effect of the moisturizer adhering to the skin and the effect of reducing friction are poor, so the area ratio of the glycerin-containing regions 32 in the skin contact region 30E (total area of ​​the glycerin-containing regions 32 / area of ​​the skin contact region 30E x 100) is preferably 3% or more, particularly 5% or more. Note that, since the skin contact region 30E means the region exposed to the surface of the article in the unfolded state as described above, when a part of the top sheet 30 is hidden by other members in the unfolded state (in the illustrated example, both sides of the top sheet 30 are hidden by the rising gathers 60), it means the region excluding the hidden parts, and when the entire surface of the top sheet 30 is exposed to the surface of the product, it means the entire surface itself.

[0078] The glycerin-containing regions 32 are preferably arranged in vertical stripes as shown in the figure. They may also be arranged in horizontal stripes, dot patterns or lattice patterns. In these cases, the interval 32X between adjacent glycerin-containing regions 32 can be appropriately determined, but is preferably, for example, about 1.5 to 10 mm.

[0079] The nonwoven fabric of the top sheet 30 has a fineness of 1 to 3 dtex (more preferably 1.5 to 2.5 dtex) and a basis weight of 10 to 30 g / m 2 (More preferably 15 to 25 g / m 2 It is preferable to use a nonwoven fabric having a thickness of 0.4 to 1.4 mm (more preferably 0.5 to 1.0 mm). That is, in such nonwoven fabrics, the fineness of the fibers contributes to reducing surface friction, and in combination with the friction reducing effect of glycerin, the overall friction reducing effect is improved. Furthermore, the fineness of the fibers improves the retention of glycerin, which also improves the friction reducing effect. Furthermore, the glycerin contained in the top sheet 30 is transferred to the wearer's skin, thereby moisturizing (preventing drying) the wearer's skin (particularly by penetrating into the stratum corneum). In short, the effect of reducing physical irritation to the wearer's skin and the effect of moisturizing the wearer's skin are highly compatible, and the effect of preventing rashes is particularly excellent. In particular, it is preferable that the combination of the nonwoven fabric and glycerin makes the average friction coefficient MIU of the glycerin-containing region 32 in the top sheet 30 0.2 to 0.4. From these viewpoints, it is particularly preferable that the nonwoven fabric of the top sheet 30 is a staple fiber nonwoven fabric.

[0080] The surface moisture content of the glycerin-containing region 32 is not particularly limited, but is preferably 3 to 10%, and particularly 4 to 8%, since this can adequately moisturize the wearer's skin and prevent it from drying out.

[0081] To form the glycerin-containing region 32, a hydrophilic lotion containing glycerin can be applied to the top sheet 30 in a desired pattern. A particularly preferred hydrophilic lotion contains 70 to 90% by weight of glycerin and 10 to 30% by weight of water. A hydrophilic lotion containing glycerin as a main component and an appropriate amount of water is not only preferred as a moisturizing agent when transferred to the skin, but is also preferred because water is retained in the glycerin as bound water (glycerin has extremely high water retention), and is less likely to spoil. That is, from this viewpoint, when a hydrophilic lotion containing water is used, if a large amount of glycerin is contained and the surface moisture content is sufficiently secured (for example, the above-mentioned 3 to 10%), and the water activity value of the hydrophilic lotion is kept low, for example, 0.8 or less, more preferably 0.3 to 0.7, and particularly preferably 0.3 to 0.5, the proliferation of microorganisms is suppressed even without the inclusion of a preservative, the preservability is improved, and the moisturizing effect when transferred to the skin is also high.

[0082] The hydrophilic lotion may contain one or more additives selected from the group consisting of emulsifiers, phosphate esters, paraffins, and surfactants. As the additive surfactant, ether-type nonionic surfactants and nonionic surfactants including EO / PO types are preferred. In order to improve the shelf life of the product, the hydrophilic lotion may contain a preservative, but since the hydrophilic lotion is transferred to the skin to moisturize the skin, it is preferable that the hydrophilic lotion does not contain a preservative.

[0083] The glycerin content in the glycerin-containing region 32 is 0.7 to 2.7 g / m 2 is preferable, and 1.0 to 2.2 g / m 2 As an example, when a glycerin-containing region is formed by applying a hydrophilic lotion containing 70 to 90% by weight of glycerin and 10 to 30% by weight of water to a top sheet, the amount of hydrophilic lotion applied in the glycerin-containing region 32 is 5 to 15 g / m 2 11, when there are multiple regions with different hydrophilic lotion contents, or when the amount of hydrophilic lotion applied changes continuously, the glycerin-containing region 32 as a whole may have a content less than or greater than the above content range, as long as it has a portion within the above content range.

[0084] The glycerin content is measured by the following glycerin content measurement method. (Method for measuring glycerin content) Prepare four identical products, and for any one of them, measure the dimensions of the glycerin-containing region 32 using the method described below, and calculate the area of ​​the glycerin-containing region 32 (total area if there are multiple glycerin-containing regions). Cut out all of the glycerin-containing regions 32 from the top sheets 30 of four of the same product (it is not necessary to cut out exactly along the edges, as long as the entire glycerin-containing region is included, some of the surrounding areas may be included) and use all of them as test specimens, or remove the top sheets 30 from four of the same product and use them as test specimens as they are. ·Place the test piece in a 300ml beaker containing water at 25°C, poke and stir it randomly with a glass rod for at least 1 minute, and then leave it immersed in water for 60 minutes. During this time, the test piece is folded and weighted, or prefolded and fixed by glue or sewing, so that the height of the test piece in the beaker is as low as possible. The amount of water is the minimum amount (e.g. 10ml) that allows the entire test piece to be immersed in water. After this time, the test piece is poked and stirred randomly with a glass rod for at least 1 minute, then lifted up and thoroughly squeezed, and the glycerin concentration of the glycerin-containing water remaining in the beaker is measured with a glycerin concentration meter. The weight of the glycerin-containing water remaining in the beaker is also measured. Based on these measurement results, the weight of glycerin contained in the glycerin-containing water is calculated. The glycerin content (g / m2) of the glycerin-containing region 32 was calculated by dividing the weight of glycerin in the glycerin-containing water by four times the area of ​​the glycerin-containing region 32 (for four products). 2 ) is calculated.

[0085] The nonwoven fabric of the top sheet 30 is preferably one that uses hydrophobic resin fibers because it is low cost, but if used as is, it will have poor glycerin retention when a hydrophilic lotion containing water is used. Therefore, it is preferable that the hydrophilic lotion has a viscosity of 150 to 400 mPa s at a temperature of 20°C. This is preferable to increase the glycerin retention in the nonwoven fabric.

[0086] In particular, when hydrophobic resin fibers are used as the nonwoven fabric of the top sheet 30, it is preferable to apply a hydrophilizing agent by coating or the like to make the nonwoven fabric hydrophilic. Making the nonwoven fabric hydrophilic is preferable because it can enhance the retention of glycerin.

[0087] As hydrophilizing agents for this purpose, taking into consideration safety for the human body and safety during processing, etc., it is preferable to use nonionic surfactants to which ethylene oxide has been added, such as higher alcohols, higher fatty acids, and alkylphenols, and anionic surfactants, such as alkyl phosphate ester salts (octyl, dodecyl type), and alkyl sulfate salts, either alone or in mixtures. The amount to be added varies depending on the required performance, but it is usually desirable to use an amount of about 0.01 to 2.0% by weight, and particularly about 0.05 to 1.0% by weight, based on the dry weight of the target sheet.

[0088] (Body fluid permeability treatment agent) A major cause of rashes in disposable wearing articles is the residual body fluids discharged from the top sheet and coming into contact with the wearer's skin, particularly when the body fluid is loose stool. In this case, it has been found that it is more desirable to apply a body fluid permeability treatment agent after producing a hydrophilic nonwoven fabric, and then apply glycerin, rather than imparting hydrophilicity to the hydrophobic nonwoven fabric, the hydrophilic nonwoven fabric, or the nonwoven fabric constituting the top sheet by treating the fibers with, for example, the above-mentioned hydrophilizing agent during the production stage.

[0089] It has been found that it is particularly desirable to use a nonionic surfactant having an amide group as the body fluid permeability treating agent.

[0090] Furthermore, as the nonionic surfactant having an amide group, an alkanol nonionic surfactant (A) having an amide group is particularly preferable.

[0091] It is preferable to apply the nonionic surfactant after the nonwoven fabric is produced, rather than treating the nonwoven fabric with the nonionic surfactant (A) during the production stage, particularly in the production line of disposable wearing articles, and more preferably by spraying from the use side of the top sheet to the back side. The reason this is effective is thought to be that the surfactant adheres between the fibers of the top sheet and activates the interface with the fibers surrounding the spaces through which body fluids, particularly loose stool, pass. If necessary, the nonwoven fabric can be treated with the surfactant (A) in advance during production, but this is not necessary since no substantial improvement in the body fluid permeability effect can be observed and it only adds to the number of treatment steps.

[0092] By applying a bodily fluid permeability treatment agent to the nonwoven fabric, and particularly by applying glycerin to areas with enhanced hydrophilicity, the glycerin remains satisfactorily near the surface of the nonwoven fabric, providing a long-lasting moisturizing effect.

[0093] That is, a body fluid permeability treatment agent containing a nonionic surfactant (A) is applied to the nonwoven fabric, and glycerin is applied particularly to the areas where hydrophilicity is enhanced, so that the glycerin remains well near the surface of the nonwoven fabric and exerts a moisturizing effect for a long period of time.

[0094] As the nonionic surfactant (A), a nonionic surfactant (A) which is an alkanol having an amide group is particularly preferable. It is more preferable to use the nonionic surfactant (A) alone, not in combination with other anionic, cationic, or amphoteric surfactants.

[0095] In a preferred embodiment, the nonionic surfactant (A) is applied after the nonwoven fabric is produced, in particular, the surfactant (A) is applied within the production line for disposable wearing articles. Therefore, as seen in, for example, Patent Document 2 cited above, taking into consideration the production stage of the nonwoven fabric by the carding method (a method of producing a web by passing the nonwoven fabric through a roller carding machine), there is no need to impart "antistatic properties" by an amphoteric surfactant, and an amphoteric surfactant is not required. In addition, the use of a single nonionic surfactant (A) for a target surface is more desirable than the use of multiple nonionic surfactants (A) having different HLB values.

[0096] The nonionic surfactant (A) desirably has a chemical formula weight or a number average molecular weight of 200-1,000.

[0097] On the other hand, the HLB value of the body fluid permeability treating agent (A) is suitably 8-16, and preferably 9.5-14, from the viewpoint of permeability of oil-containing body fluids such as loose stool.

[0098] The HLB value in the present invention is an HLB value according to the Oda method, which is a hydrophilic-hydrophobic balance value, and can be calculated from the ratio of the organic value to the inorganic value of an organic compound. HLB≒10×inorganic / organic In addition, inorganic and organic values ​​are described in detail on page 501 of the literature "Synthesis of Surfactants and Their Applications" (published by Maki Shoten, written by Oda and Teramura).

[0099] The treatment agent can be applied to the top sheet in any suitable manner, such as a non-contact method using a summit, spiral, signature, or one- or two-fluid spray, a contact method using a slot coater, or a printing method using a hammer roll, but a one- or two-fluid spray is preferable in terms of penetration between the fibers of the nonwoven fabric.

[0100] The amount of the body fluid permeability treating agent (soft stool permeability treating agent in the case of disposable diapers) attached to the fibers is preferably 0.05 to 2 wt %, more preferably 0.2 to 2 wt %, in terms of solid content, based on the fiber weight.

[0101] A disposable wearing article generally comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element, in that order. The second sheet is disposed under the top sheet so as to be in contact with the top sheet at least during use. It is desirable for bodily fluids to permeate the top sheet and quickly transfer to the second sheet (and ultimately to the absorbent element).

[0102] For this purpose, a second bodily fluid permeability treating agent can be applied to the second sheet. As the second bodily fluid permeability treating agent, it is considered to use a nonionic surfactant having an amide group, which is the same as that applied to the top sheet. However, body fluids contain oil as well as water, and this oil can cause clogging of the second sheet and inhibit migration to the absorbent element, so it is desirable to apply a third body fluid permeability treatment agent to the second sheet that has a high affinity for oil and has an HLB value of 2.0 to 11.0, preferably an HLB value of 4.0 to 10.0, and particularly preferably an HLB value of 7.0 to 10.0, different from the first body fluid permeability treatment agent, and preferably has an HLB value lower than the HLB value of the first body fluid permeability treatment agent.

[0103] On the other hand, the top sheet can also be a laminated nonwoven fabric, with a first bodily fluid permeability treatment agent applied to the surface that comes into contact with the wearer's skin and a second bodily fluid permeability treatment agent applied to the surface opposite the surface that comes into contact with the wearer's skin. As a second body fluid permeability treatment agent that is different from the first body fluid permeability treatment agent and preferably has an HLB value lower than the HLB value of the first body fluid permeability treatment agent, for example, a polyoxyethylene glycol fatty acid ester type nonionic surfactant can be suitably used. Examples of the polyoxyethylene glycol fatty acid ester type nonionic surfactant include one or two types of nonionic surfactants selected from polyoxyethylene diolate and polyoxyethylene distearate.

[0104] The method of applying the second bodily fluid permeability treating agent to the back side of the top sheet and the method of applying the third bodily fluid permeability treating agent to the second sheet may be the same as or different from the method of applying the first bodily fluid permeability treating agent to the top sheet. Spraying one or two fluids is preferable in terms of penetration between the fibers of the nonwoven fabric.

[0105] Glycerin is applied to the top sheet of the disposable wearing article to which the bodily fluid permeability treating agent has been applied, and may also be applied to the second sheet and absorbent body, if necessary. The application method can be the same as that for the top sheet. However, when a liquid permeability treating agent is applied to the second sheet, the bodily fluid permeability is improved, so that the application of glycerin is generally not necessary.

[0106] The effects of the embodiment will be explained below. <Sensory effect confirmation test by applying glycerin> For each of the top sheet samples shown in Table 1, various properties such as the average friction coefficient MIU, surface moisture content, and water activity value were measured. The glycerin content was measured by the above-mentioned measurement method. Samples 1 to 10 were nonwoven fabrics with or without hydrophilic lotion applied before assembly into products, and samples 11 to 15 were top sheets removed from commercially available products. In addition, the surface of each top sheet was stroked back and forth with the hand, and the smoothness and moist feeling were evaluated in comparison with sample 5 on a three-level scale (◎: very excellent, △: better than sample 5, ×: about the same).

[0107] [Table 1]

[0108] [Table 2]

[0109] [Table 3]

[0110] As shown in Table 1, it was found that the surfaces of the top sheets of Samples 1 to 4 and 6 to 9, and especially Samples 1 to 4, 8 and 9, felt very smooth and moist. In comparison, Samples 10 to 15 were inferior in smoothness and moistness. Sample 9 felt moist, but sticky to the touch.

[0111] <Preliminary selection of fluid permeability treatment agent> A preliminary experiment was carried out to select a fluid permeability treatment agent. As artificial feces, 0.5 g of commercially available 40% yogurt and 0.5 g (pure content) of each treatment agent were added, and water was added to make up to 20 g. The system was shaken until it became homogenous, and then left in a transparent glass beaker for 1 hour to observe the state of dispersion. Some particles separated and settled, some showed signs of settling, some remained dispersed, and some separated into upper and lower parts.

[0112] The results are shown in Table 4. Here, the above-mentioned HLB values ​​for various body fluid permeability treating agents of different systems are shown. [Table 4]

[0113] The results in Table 4 revealed some interesting findings. That is, because artificial feces is mainly water with some oil, it tends to separate when used with an oil-based treatment agent (S2) that has high lipophilicity (low HLB value), it tends to separate when used with a silicone-based treatment agent (S1) that shows a hydrophilic tendency, and it also settles when used with a silicone-based treatment agent (S2) that shows a hydrophilic tendency. In contrast, it was found that even the nonionic amide treatment agent (S8) had a tendency to separate, that the silicone-based treatment agent (S1) which shows a hydrophilic tendency also had a tendency to separate, and that the fatty acid alkanolamide treatment agent (S3) which shows a hydrophilic tendency was solubilized, and therefore may be effective as a treatment agent for allowing soft stool to easily pass through the top sheet not only with respect to water but also with oil. When the amide treatment agent (S8) and the nonionic treatment agent (S7) that does not have an amide group were visually observed, it was strongly predicted that the amide treatment agent (S8) would have higher dispersibility. This was expected to be due to the presence of the amide group in the amide treatment agent (S8). In the case of the amide processing agent (S8) having an amide group, the artificial fecal component (yogurt) is mostly dissolved but separated without being dispersed, whereas in the case of the nonionic fatty acid alkanolamide processing agent (S3), it is solubilized. Furthermore, the amide treatment agent (S8) is mostly dissolved but separates and does not disperse because it has a low HLB value and tends to be hydrophobic (lipophilic), whereas the nonionic fatty acid alkanolamide treatment agent (S3), which has an HLB value with a good balance between hydrophilicity and lipophilicity, is soluble. Therefore, it was strongly predicted that it is an excellent body fluid permeability treatment agent. With this in mind, we moved on to the next experiment.

[0114] <Experiment using a body fluid permeability treatment agent> Various treatments selected from the results in Table 4 were used as bodily fluid permeability treatments, and tests were conducted on the absorption speed, backflow amount, and flow (diffusion) distance when artificial soft stool (yogurt) was applied to simulated disposable diapers consisting of a top sheet alone, and a top sheet, second sheet, absorbent body, and back sheet arranged in that order, depending on the type of treatment.

[0115] <Type and adjustment of top sheet> As the body fluid permeability treatment agent, various treatment agents with different HLB values ​​were prepared. (1) 1 g of the treatment agent was applied to 1 g of commercially available A4-sized nonwoven fabric (a mixed air-through nonwoven fabric of 2.0 dtx PE fiber + 2.2 dtx PET fiber), and the treatment agent was diluted with ionized water to 0.1 wt%. Note that "wt%" here refers to the proportion of the treatment agent attached per unit weight of the nonwoven fabric fiber. (2) Place 0.5 g of the treatment agent in a tray, stretch out the top sheet and immerse the back side in the treatment agent for 30 seconds, then turn the top sheet over to the front side and immerse it in 0.5 g of the treatment agent for another 30 seconds. (3) Allow to dry overnight. (4) In the treatment agent concentration gradient test, the top sheet is stretched and immersed from the back side for 30 seconds, then turned over to the front side of the top sheet and immersed in treatment agents of different concentrations on the back side and front side for 30 seconds.

[0116] <Testing the top sheet alone: ​​Simple flat plate test> As a simulated feces sample, 5cc of 65% yogurt (ionized water:yogurt = 7:13) was made with ionized water. A small amount of blue dye was added to make it visible. (1) The back absorbent material is "Pro Wipe Strong Type" manufactured by Daio Paper Co., Ltd., 80 g / m 2 Each type of top sheet was placed on top of two sheets of the above, and 10 cc of liquid was poured in at a speed of 120 ml / min. The time it took for the liquid to disappear from the surface of the top sheet was measured and this was taken as the absorption rate. (2) Three minutes after injection, 10 pieces of filter paper and a 1 kg cylindrical weight (area 100 cm) were placed on the injection site. 2 ) (3) After 1 minute, measure the weight of the filter paper and subtract it from the weight to determine the amount of artificial stool reflux. (4) 15° liquid flow (diffusion distance and diffusion velocity) The injection test was performed with the top side of the support plate supporting the top sheet inclined downward at an angle of 15 degrees, and the absorption rate was measured. In addition, the diffusion length (total length) of the artificial feces on the surface of the top sheet after it had completely flowed over the surface was measured with a scale.

[0117] The results are shown in Tables 4 and 5. [Table 4] [Table 5]

[0118] <Evaluation of test results for top sheet alone: ​​Evaluation of simple flat plate test results> (1) As shown in Table 4, due to differences in HLB (differences in hydrophilicity and hydrophobicity), the S2 treatment agent (silicon-based) and S3 treatment agent, which have a good balance between intermediate hydrophilicity and hydrophobicity, had favorable absorption speed and liquid flow (short diffusion distance). It became clear that neither the highly lipophilic S1 treatment agent (natural oil) nor the highly hydrophilic S4 treatment agent (anionic surfactant) could be expected to produce the desired effects. In particular, the fatty acid alkanol having an amide group (amide-type nonionic surfactant) S3 treatment agent was excellent, exhibiting good initial absorption and diffusibility and being less likely to flow (diffuse). In addition, although not shown in Table 5, the S8 treatment agent made of a natural amide having an amide group, as shown in the dispersibility test in Table 4, separated in the dispersibility test, but since most of the artificial feces component (yogurt) was dissolved, there was no significant problem with dispersibility, and therefore it showed better results than the S1, S2 and S4 treatment agents. (2) As shown in Table 5, the effect did not change even when the concentration of the S3 treatment agent was increased. Note that, unlike the test day when the top sheet was used alone, the type of commercially available yogurt used was the same, but the properties were different. (3) As shown in Table 5, for the S3 treatment agent, which has a good balance between hydrophilicity and hydrophobicity, a gradient was applied between the back side and the front side, but no effect was observed.

[0119] <Glycerin application test after application of body fluid permeability treatment agent> A lotion (glycerin) was applied under the same conditions to the top sheet (nonwoven fabric of sample number 2) to which the S3 treatment agent, which had shown good results, had been applied. In addition, comparisons were made between no treatment, application of only lotion (glycerin), and application of the highly lipophilic S1 treatment.

[0120] The results are shown in Table 6. [Table 6]

[0121] <Evaluation of glycerin application test results> (1) Compared to the non-applied case, the one with lotion (glycerin) applied had a longer flow distance. This is thought to be because the lotion (glycerin) reduces the ability of the oil in the stool to penetrate the top sheet, causing it to be repelled by the surface. (2) When lotion (glycerin) was applied to the top sheet, the flow distance was significantly longer than that of the highly lipophilic S1 treatment. This is thought to be because the moisture in the feces is repelled by the lipophilic surface of the top sheet.

[0122] <First test using simulated disposable diapers: Diaper flat plate test> A similar test was carried out on a simulated disposable diaper of newborn size in which a top sheet, a second sheet, an absorbent body and a back sheet were arranged in this order. A 40% yogurt (ionized water:yogurt = 3:2) was prepared as a simulated feces sample from commercially available yogurt. A small amount of blue dye was added to make it visible. (1) 10 cc of liquid is poured into a simulated disposable diaper at a speed of 120 ml / min, and the time it takes for the liquid to drain from the surface of the top sheet is measured and this is taken as the absorption rate. (2) Three minutes after injection, 10 pieces of filter paper and a 1 kg cylindrical weight (area 100 cm) were placed on the injection site. 2 ) is posted. (3) After 1 minute, measure the weight of the filter paper and subtract it from the weight to determine the amount of artificial stool reflux. (4) 15° liquid flow (diffusion distance and diffusion velocity) With the upper side of the support plate of the top sheet inclined downward at an angle of 15 degrees, 5 ml of artificial stool was injected at a rate of 420 ml / min, and the distance that it flowed along the surface was measured on a scale. However, unlike the test day when the top sheet was used alone, the type of commercially available yogurt used was the same, but the properties were different and the concentration was 40%, so there was also a difference in this respect.

[0123] The results are shown in Table 7. [Table 7]

[0124] <Evaluation of the first test results using mock disposable diapers> It was revealed that the application of the body fluid permeability treating agent of the embodiment improves the absorbency of body fluids.

[0125] <2nd Test and Evaluation of Disposable Diapers> The above experiment revealed that application of the S3 treatment agent improved the absorbency of body fluids. Therefore, a test similar to the first simulated disposable diaper test was conducted on both the top sheet and the second sheet with 0.10% by weight of the S3 treatment agent.

[0126] The results are shown in Table 8. The flow distance in the CD direction is also shown. [Table 8] The "number of times it flowed out" refers to the number of tests in which it was visually confirmed that bodily fluids had flowed out of the "disposable diaper" when three tests were conducted on simulated disposable diapers of essentially the same structure. In addition, whether or not it "flowed out" was determined based on whether or not the simulated feces reached the front-rear edges of the absorbent element. FIG. 13 shows Example 1 in which the artificial feces reaches the front-rear edge of the absorbent element, and FIG. 14 shows Example 2 in which the artificial feces does not reach the front-rear edge of the absorbent element.

[0127] Test results show that it is more desirable to apply the fluid permeability treatment to both the top sheet and the second sheet. This result is believed to be due to the fact that the body fluid permeability treating agent has the function of promoting the transfer of body fluids from the top sheet to the second sheet.

[0128] On the other hand, as mentioned above, since body fluids contain oil, it is desirable to apply a second body fluid permeability treatment agent that has an affinity for oil and is different from the first body fluid permeability treatment agent, having an HLB value of 2.0 to 11.0, desirably lower than that of the first body fluid permeability treatment agent, to increase the permeability of both water and oil. Test examples relating to this point are also shown in Table 8. The types of body fluid permeability treating agents are as follows. <Examples 3 and 4> Body fluid permeability treatment agent S51: Polyoxyethylene diolate (HLB value: 8.4). <Example 5> Body fluid permeability treatment agent S52: Polyoxyethylene laurate (HLB value: 6.6) <Example 6> Body fluid permeability treatment agent S53: Polyoxyethylene diolate (HLB value: 10.4)

[0129] Looking at Table 8 as a whole, it is clear that it is desirable to use a second body fluid permeability treating agent that is different from the first body fluid permeability treating agent and has an affinity for oil, with a viscosity of 2.0 to 11.0. It is also clear that a polyoxyethylene glycol fatty acid ester-type nonionic surfactant is desirable. It is understood that the HLB value is particularly suitable for those that show affinity for both oil and water.

[0130] The embodiment also includes the following aspects. <First aspect> a topsheet including a skin contact area adapted to contact the wearer's skin; The top sheet has a fineness of 1 to 3 dtex and a basis weight of 10 to 30 g / m 2 It is a nonwoven fabric, The skin contact area contains 0.7 to 2.7 g / m glycerin. 2 having a glycerin-containing region contained therein; A disposable wearing article characterized by: (Action and effect) In the combination of glycerin and a nonwoven top sheet, it is preferable to use a combination of a glycerin content per unit area and a nonwoven fabric with fine fibers in the top sheet. In such a top sheet, the fineness of the fibers contributes to reducing surface friction, and in combination with the friction reducing effect of glycerin, the overall friction reducing effect is improved. In addition, the fine fibers improve the retention of glycerin, which also improves the friction reducing effect. Furthermore, the glycerin contained in the top sheet is transferred to the wearer's skin, thereby moisturizing (preventing drying) the wearer's skin (especially by penetrating into the stratum corneum). Therefore, the effect of reducing physical irritation to the wearer's skin and the effect of moisturizing the wearer's skin are highly compatible, and the top sheet is particularly excellent in preventing rashes.

[0131] <Second aspect> The glycerin-containing region has a dimension in the MD direction of 5 mm or more and a dimension in the CD direction of 5 mm or more, The area ratio of the glycerin-containing region to the skin contact region in the unfolded state is 3% or more. A disposable wearing article according to a first embodiment. (Action and effect) When the dimensions and area ratio of the glycerin-containing region are within the above ranges, the effect of reducing physical irritation and the effect of moisturizing the wearer's skin are particularly excellent.

[0132] <Explanation of terms used in the specification> As used herein, the following terms have the following meanings unless otherwise specified in the specification.

[0133] The "front-rear direction" refers to the direction indicated by the symbol LD in the drawing (longitudinal direction), and the "width direction" refers to the direction indicated by the symbol WD in the drawing (left-right direction), with the front-rear direction and the width direction being perpendicular to each other.

[0134] "MD" and "CD" refer to the machine direction (MD) and the cross direction (CD) perpendicular to it in the manufacturing equipment, and depending on the part of the product, one of them may be the front-rear direction and the other the width direction. The MD direction of a nonwoven fabric is the direction of fiber orientation of the nonwoven fabric. Fiber orientation is the direction in which the fibers of the nonwoven fabric are aligned, and can be determined, for example, by a measurement method based on the TAPPI standard method T481 fiber orientation test method using zero-distance tensile strength, or a simplified measurement method that determines the fiber orientation direction from the ratio of tensile strength in the front-rear direction and the width direction.

[0135] "Front side" means the side closest to the wearer's skin when worn, and "back side" means the side away from the wearer's skin when worn.

[0136] "Front" means the side closest to the wearer's skin when worn, and "back" means the side away from the wearer's skin when worn.

[0137] "Area ratio" means the ratio of the target portion to a unit area, and is expressed as a percentage by dividing the total area of ​​the target portions (e.g., holes) in the target area (e.g., cover nonwoven fabric) by the area of ​​the target area. In a form in which many target portions are provided at intervals, it is desirable to determine the area ratio by setting the target area to a size that includes 10 or more target portions. For example, the area ratio of holes can be measured using, for example, a Keyence product VHX-1000, with measurement conditions set at 20 times, as follows: (1) Set it on a 20x lens and adjust the focus. Adjust the position of the nonwoven fabric so that it fits a 4x6 hole. (2) Specify the brightness of the hole area and measure the area of ​​the hole. (3) Click on the color extraction for "Area measurement" in "Measurement / Comment". Click on the hole area. (4) Click "Bulk measurement", check "Show measurement results window", and save the data as CSV.

[0138] "Elongation rate" refers to the value when the natural length is taken as 100%. For example, an elongation rate of 200% is equivalent to an elongation ratio of 2 times.

[0139] "Gel strength" is measured as follows: 1.0g of superabsorbent polymer is added to 49.0g of artificial urine (a mixture of urea: 2wt%, sodium chloride: 0.8wt%, calcium chloride dihydrate: 0.03wt%, magnesium sulfate heptahydrate: 0.08wt%, and ion-exchanged water: 97.09wt%) and stirred with a stirrer. The resulting gel is left in a thermo-hygrostat at 40℃ x 60%RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (I.techno Engineering: Curdmeter-MAX ME-500).

[0140] - "Basis weight" is measured as follows. After pre-drying the sample or test piece, leave it in a test room or device under standard conditions (test location: temperature 23±1°C, relative humidity 50±2%) until it reaches a constant weight. Pre-drying refers to bringing the sample or test piece to a constant weight in an environment at a temperature of 100°C. Note that pre-drying is not necessary for fibers with an official moisture regain of 0.0%. From the test piece that has reached a constant weight, a sample template (100mm x 100mm) is used to cut out a sample measuring 100mm x 100mm. The weight of the sample is measured and multiplied by 100 to calculate the weight per square meter, which is the basis weight.

[0141] "Thickness" is measured using an automatic thickness measuring device (KES-G5 handy compression measurement program) with a load of 0.098N / cm 2 , and pressure area: 2cm 2 The thickness of a nonwoven fabric having holes is measured at the part other than the holes and the protruding parts around them.

[0142] The water absorption is measured according to JIS K7223-1996 "Test method for water absorption of superabsorbent resins."

[0143] The water absorption rate is the "time to the end point" when 2g of superabsorbent polymer and 50g of physiological saline are used and the JIS K7224-1996 "Test method for water absorption rate of superabsorbent polymers" is performed.

[0144] "Unfolded state" means a flat, unfolded state without contraction or sagging.

[0145] *Unless otherwise specified, the dimensions of each part refer to the dimensions in the unfolded state, not in the natural length state.

[0146] "Melt viscosity" is measured in accordance with JIS Z 8803 using a Brookfield B-type viscometer (spindle No. 027) at a specified temperature.

[0147] The "maximum dimension" of a hole means the longer dimension of the dimension in the MD direction or the dimension in the CD direction.

[0148] If the "glycerin-containing region" can be identified visually, for example by coloring, its shape can be identified visually and its dimensions can be measured. On the other hand, if the glycerin-containing region 32 cannot be identified visually, the glycerin-containing region 32 can be identified by an appropriate method. For example, a required number of specimens (for measurement and for position determination) with the same position of the glycerin-containing region 32 are prepared, the glycerin-containing region 32 in the top sheet 30 of the specimen for position determination is colored a different color from the surrounding area with an appropriate coloring agent, and the colored position is identified using a ruler or an appropriate image measuring device, and then the same position of the specimen for measurement as the colored position identified in the specimen for position determination is used as the glycerin-containing region 32 for measurement. As a material for coloring the glycerin-containing region 32, a water leakage color developing agent "Moremile W" by Taseto Co., Ltd. can be suitably used. Furthermore, when the moisture content of the glycerin-containing region 32 is equal to or greater than a certain level, the glycerin-containing region 32 can be visualized (identified) as a darker area than the surrounding area and its dimensions can be measured by imaging the surface of the top sheet under lighting (room light and external light from a window) using a near-infrared camera (NIRCam-640SN manufactured by Vision Sensing Corporation).

[0149] "Average friction coefficient MIU" and "average friction coefficient variation deviation MMD" refer to the values ​​measured using a friction tester KES-SE (10 mm square silicon sensor, 50 g load) manufactured by Kato Tech Co., Ltd., over a sensor movement distance of 20 mm. The sensor movement direction (friction direction) is the MD direction of the top sheet. When measuring the product, remove or cut off any components other than the top sheet in the product to the extent that they do not affect the friction test on the top sheet surface (therefore, for example, components welded to the top sheet are not removed), and the test is performed in an unfolded state. When the CD dimension of the glycerin-containing region in the top sheet is less than the sensor dimension (10 mm), as shown in Fig. 12(a), the top sheet 30 is cut along the side edge of the glycerin-containing region 32 to create a specimen 300 (narrower than the sensor 100) consisting of only the glycerin-containing region 32, and measurements are taken of this specimen by aligning the center of the sensor 100 with the center of the CD direction of the specimen 300 as shown in Fig. 12(b). Note that after each measurement, glycerin and the like adhering to the surface of the sensor 100 is thoroughly wiped off before the next measurement is performed. The glycerin-containing region 32 is identified by the method described above.

[0150] "Surface moisture content" is the average value calculated by measuring any three points of the glycerin-containing region 32 using a Scalar moisture checker (MY-808S). After each measurement, any glycerin or other substances adhering to the measurement surface of the moisture checker are thoroughly wiped off before the next measurement. The glycerin-containing region 32 is identified by the method described above.

[0151] "Water activity value" can be measured using an electrical resistance type water activity measuring device such as Freund Corporation's EZ-100ST (electrical resistance type). Before measurement, calibration is performed using a saturated solution. Measurements can be performed in accordance with the electrical resistance type test based on the Food Sanitation Inspection Guideline. That is, a sample is taken in an amount that is 3% or more of the volume of the space inside the detector of the water activity measuring device, placed on an aluminum foil dish or an open flat dish, immediately placed in the detector and sealed, placed under conditions of 25±2 degrees, and the value is read at 10-minute intervals. The point at which no change in the value is observed is considered to be the point at which the water vapor pressure inside the detector has reached equilibrium, and the value at that point is the measured value for that sample. Each sample is measured three times, and the average of the three measurements is the water activity value.

[0152] "Viscosity" is measured at a specified temperature using a Brookfield Type B viscometer (spindle No. 027) in accordance with JIS Z 8803.

[0153] If no specification is given regarding the environmental conditions for a test or measurement, the test or measurement shall be carried out in a test room or equipment under standard conditions (the test location shall be a temperature of 23±1°C and a relative humidity of 50±2%). [Industrial Applicability]

[0154] The present invention can be used for disposable wearing articles in general, such as pants-type disposable diapers, tape-type disposable diapers, pad-type disposable diapers, disposable swimwear, diaper covers, sanitary napkins, etc. [Explanation of symbols]

[0155] 11...liquid-impermeable sheet, 14...holes, 20...exterior nonwoven fabric, 30...top sheet, 32...glycerin-containing region, 40...second sheet, 50...absorbent element, 56...absorbent body, 58...packaging sheet, 60...rise gathers, 62...gathered sheet, LD...front-rear direction, WD...width direction.

Claims

1. The garment comprises a top sheet having a skin contact area that contacts the wearer's skin, a second sheet, and an absorbent element in this order; The top sheet has a basis weight of 5 to 40 g / m ２ It is a laminated nonwoven fabric of a first bodily fluid permeability treating agent having an HLB value of 8 to 16 and containing a nonionic surfactant having an amide group is applied to at least the skin contact area of ​​the surface of the top sheet that contacts the wearer's skin; A second bodily fluid permeability treating agent having an HLB of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to the surface of the top sheet opposite to the surface that contacts the wearer's skin, and a third bodily fluid permeability treating agent having an HLB of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to the second sheet, Glycerin is applied to the area of ​​the top sheet to which the first body fluid permeability treating agent is applied, thereby forming a glycerin-containing area. A disposable wearing article characterized by:

2. The glycerin-containing region has a dimension in the MD direction of 5 mm or more and a dimension in the CD direction of 5 mm or more, The area ratio of the glycerin-containing region to the skin contact region in the unfolded state is 3% or more. The disposable wearing article according to claim 1.

3. In the manufacture of a disposable wearing article having a top sheet having a skin contact area that contacts the skin of a wearer, The top sheet has a basis weight of 5 to 40 g / m ２ a first body fluid permeability treating agent containing a nonionic surfactant having an HLB value of 8 to 16 and an amide group is applied to at least the skin contact area; A second bodily fluid permeability treating agent having an HLB of 2.0 to 11.0 and different from the first bodily fluid permeability treating agent is applied to the surface of the top sheet opposite to the surface that contacts the wearer's skin, A third bodily fluid permeability treatment agent having an HLB of 2.0 to 11.0 and different from the first bodily fluid permeability treatment agent is applied to the second sheet; applying glycerin to the area of ​​the top sheet to which the first body fluid permeability treating agent has been applied to form the glycerin-containing area; The method for producing a disposable wearing article is characterized in that

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