Absorbent article

Abstract

To provide an absorbent article which shows excellent touch and has adhesive strength not to generate holes when a circumference of the absorbent article is bonded by a round seal.SOLUTION: An absorbent article 1 includes a top sheet 10, a second sheet 20 adjacent to the top sheet, a back sheet 40, and an absorber 30 arranged between the second sheet and the back sheet. The top sheet, the second sheet, and the back sheet are fixed by a round seal 51, 52 at both end parts in a longitudinal direction of the absorbent article. Each of the top sheet and the second sheet includes a polyester fiber of a weight ratio of 25% or more and 60% or less. The top sheet is constituted of an air-through non-woven fabric of fineness of 1.8 dtex or more and 3.0 dtex or less, and the second sheet is constituted of an air-through non-woven fabric of fineness of 1.8 dtex or more and 9.0 dtex or less. The fineness of the second sheet is at least one time and less than three times of the fineness of the top sheet.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Recently, absorbent articles such as disposable diapers, mild incontinence products, and pet sheets often use bulky nonwoven fabrics in the first and second layers on the surface that comes into direct contact with the skin to improve the feel and absorbency of the absorbent article. Furthermore, many absorbent articles have round seals attached by thermal bonding along the width direction at both ends of their longitudinal direction.

[0003] However, when nonwoven fabrics are thermally bonded together, nonwoven fabrics with a thicker fiber diameter (high fineness) and higher bulk tend to have lower adhesive strength than nonwoven fabrics with a thinner fiber diameter (low fineness) and lower bulk, which can lead to problems such as insufficient adhesive strength causing the bond to come loose when the absorbent body swells. One way to sufficiently bond multiple nonwoven fabrics together is to increase the temperature and pressure during thermal bonding, but increasing the temperature can cause problems such as holes being more likely to appear in the round seal of the product, reducing its aesthetic appeal, and increasing the pressure can increase the strain on production equipment.

[0004] Patent Document 1 discloses that a sheet for absorbent articles to be placed between a topsheet and an absorbent core uses a core-sheath type thermally adhesive composite fiber having a core made of an olefin polymer, a polyester polymer, or a polyamide polymer and a sheath containing (1) a copolymer mainly composed of propylene, (2) a copolymer mainly composed of ethylene, or (3) a low-density polyethylene, thereby preventing the absorbent article from twisting in the surface direction. However, there is no disclosure regarding the feel of the absorbent article against the skin or the adhesiveness of the round seal. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2001-238910 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide an absorbent article that is pleasant to the touch, does not develop holes in the round seal, and has sufficient adhesive strength, even when multiple high-fiber, bulky nonwoven fabrics are bonded together with a round seal formed by thermal compression bonding. [Means for solving the problem]

[0007]

[0006] In view of the above-mentioned problems, the present inventors have conducted extensive research. As a result, they have found that the above-mentioned problems can be solved by specifying the positions and dimensions at which the top sheet, second sheet, and back sheet are round-sealed by thermocompression bonding, as well as the polyester fiber ratio, fineness, and manufacturing method of the nonwoven fabrics used in the top sheet and second sheet, in an absorbent article comprising a liquid-permeable top sheet provided on the skin-contacting side in the thickness direction of the absorbent article, a liquid-permeable second sheet adjacent to the top sheet, a liquid-impermeable back sheet provided on the non-skin-contacting side in the thickness direction of the absorbent article, and an absorbent core disposed between the second sheet and the back sheet, and have completed the present invention.

[0007] The present invention relates to the following absorbent article.

[0008] (1) A first aspect of the present invention is an absorbent article comprising a liquid-permeable top sheet provided on the skin-contacting side in the thickness direction of the absorbent article, a liquid-permeable second sheet adjacent to the top sheet, a liquid-impermeable back sheet provided on the non-skin-contacting side in the thickness direction, and an absorbent body disposed between the second sheet and the back sheet, wherein the top sheet, the second sheet, and the back sheet are secured together with round seals formed by thermocompression bonding along the width direction at both longitudinal end portions of the absorbent article, and the top sheet and the second sheet each contain polyester fiber in a weight ratio of 25% to less than 60%, the top sheet being made of an air-through nonwoven fabric having a fineness of 1.8 dtex to 3.0 dtex, and the second sheet being made of an air-through nonwoven fabric having a fineness of 1.8 dtex to 9.0 dtex, and the fineness of the second sheet being at least 1 time but less than 3 times the fineness of the top sheet.

[0009] (2) A second aspect of the present invention is an absorbent article as described in (1), characterized in that the dimensions of each of the round seals are 4 mm or more and 12 mm or less in the longitudinal direction and 25 mm or more and 90 mm or less in the width direction.

[0010] (3) A third aspect of the present invention is the absorbent article according to (1), wherein the basis weight of the top sheet is 18 g / m 2 More than 30g / m 2 Hereinafter, the basis weight of the second sheet is 18 g / m 2 More than 40g / m 2 The present invention is characterized in that: [Effects of the Invention]

[0011] According to the present invention, even when multiple high-fiber, bulky nonwoven fabrics are bonded with a round seal by thermocompression, it is possible to provide an absorbent article that is pleasant to the touch, does not develop holes in the round seal, and has sufficient adhesive strength.Furthermore, the absorbency rate and liquid return properties are good. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic plan view showing the configuration of an absorbent article according to a first embodiment of the present invention. [Figure 2] 2 is a longitudinal schematic cross-sectional view taken along the Y1-Y1 cutting line shown in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0013] In this specification, the longitudinal direction of an absorbent article is the direction indicated by Y in the figure that extends from the front to the back of the body through the crotch region of the wearer when the absorbent article is worn on the body, the width direction is the direction indicated by X in the figure that is perpendicular to the longitudinal direction, and the thickness direction is the direction indicated by Z in the figure in which the respective constituent members are stacked.

[0014] In this specification, the skin-contacting surface (hereinafter also simply referred to as the "skin surface") refers to the surface that contacts or faces the wearer's skin when the absorbent article is worn, and the non-skin-contacting surface (hereinafter also simply referred to as the "non-skin surface") refers to the surface that contacts or faces the wearer's clothing. Body fluids refer to liquids excreted from the body to the outside, such as urine, blood, and water in loose stools.

[0015] In this specification, fineness refers to the average thickness of the fibers used in nonwoven fabrics. dtex (decitex) is the mass of 10,000 meters of yarn expressed in grams, and the larger the number, the thicker the fiber diameter.

[0016] [Absorbent articles] An absorbent article 1 according to a first embodiment will be described below with reference to the accompanying drawings. Figures 1 and 2 show the absorbent article 1. These drawings do not prescribe the shapes, dimensions, size relationships, etc. of the components in the absorbent article 1.

[0017] The absorbent article 1 of this embodiment can be used as a variety of absorbent articles for both babies and adults, including pad products such as light incontinence pads and urine absorption pads, and pants-type products such as pants-type disposable diapers and tape-fastened disposable diapers. A pants-type product as an outer layer may be combined with an absorbent article 1 in the form of a pad product as an inner layer. The longitudinal dimension (hereinafter also simply referred to as "length") and width dimension (hereinafter also simply referred to as "width") of the absorbent article 1 are not particularly limited, but are preferably in the range of 140 mm to 400 mm in the longitudinal direction and 50 mm to 180 mm in the width direction. By adjusting the dimensions of the absorbent article 1 within these ranges, absorbent articles 1 for a variety of uses can be easily obtained.

[0018] The absorbent article 1 comprises a liquid-permeable top sheet 10 positioned on the skin side of the wearer, a liquid-permeable second sheet 20 adjacent to the top sheet 10, a liquid-impermeable back sheet 40 positioned opposite the top sheet 10 and not on the skin side of the wearer, and an absorbent body 30 disposed between the second sheet 20 and the back sheet 40.

[0019] The configuration of each of the top sheet 10, second sheet 20, back sheet 40, and absorbent body 30 will be described in more detail below.

[0020] [Top sheet] The top sheet 10 is a liquid-permeable sheet for diffusing bodily fluids through the second sheet 20 to the absorbent body 30. The top sheet 10 has the property of quickly diffusing bodily fluids and, because it is the sheet that comes into contact with the skin, has the property of being soft to the touch and not irritating to the skin. The top sheet 10 may be a single layer or a multi-layer laminate, and may have perforations formed to impart a dry touch. In order to reduce irritation to the skin, the top sheet 10 may contain an antibacterial agent, a pH adjuster, a moisturizer, etc.

[0021] (Topsheet material) The top sheet 10 contains polyester fiber in a weight ratio of 25% to less than 60%, preferably 30% to 50%. Polyester fiber is heat-resistant and therefore suitable for thermocompression bonding, and is suitable for quickly diffusing body fluids into the second sheet 20 and absorbent body 30. It also dries quickly, which makes it suitable for reducing stickiness and maintaining a pleasant feel against the skin. If the weight ratio of polyester fiber is less than 25%, holes may form in the round seals 51 and 52 during heat sealing by thermocompression bonding, as described below. If the weight ratio is 60% or more, the absorbent article 1 will be stiff and have an inferior feel against the skin.

[0022] Examples of polyester fibers include polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), and polybutylene terephthalate (PBT). Among these, polyethylene terephthalate (PET) is preferred because it has a high melting point and can withstand heat and pressure bonding.

[0023] In addition to polyester fibers, the top sheet 10 may be made of natural fibers such as cotton fibers and cellulose fibers, and synthetic fibers such as polyolefin fibers such as polyethylene fibers and polypropylene fibers.

[0024] (Top sheet fineness) The fineness of the top sheet 10 is 1.8 dtex or more and 3.0 dtex or less, and preferably 2.0 dtex or more and 2.5 dtex or less. If the fineness is less than 1.8 dtex, bodily fluids may not be sufficiently diffused, resulting in a slow absorption rate. If the fineness exceeds 3.0 dtex, the absorbent article 1 may be stiff and have an inferior feel against the skin, and the adhesive strength between the top sheet 10 and the second sheet 20 at the round seals 51, 52 may be poor.

[0025] (Top sheet basis weight) The basis weight of the top sheet 10 is 18 g / m 2 More than 30g / m 2 Less than 22 g / m is preferred 2 More than 28g / m 2 More preferably, the basis weight is 18 g / m2 If the density is less than 30 g / m, the absorbent article 1 may become stiff and feel poor on the skin, and the absorption rate may be slow. 2 If it exceeds this value, the adhesive strength between the top sheet 10 and the second sheet 20 at the round seals 51, 52 will be poor, and there is a risk that the amount of fluid returning to the absorbent article 1 after absorbing body fluids will increase.

[0026] (Top sheet manufacturing method) The nonwoven fabric of the top sheet 10 is manufactured by the air-through method. By using a nonwoven fabric manufactured by the air-through method, it is possible to obtain the effect of preventing the skin from getting wet, becoming stuffy, and rubbing. Note that the manufacturing method for the air-through method may be a generally known technique.

[0027] [Second seat] The second sheet 20 is a liquid-permeable sheet for quickly diffusing bodily fluids diffused from the top sheet 10 into the absorbent body 30. The second sheet 20 has the property of quickly diffusing bodily fluids and the property of suppressing fluid return from the absorbent body 30. Furthermore, the second sheet 20 preferably has a faster bodily fluid permeation rate than the top sheet 10 and the property of quickly diffusing bodily fluids into the absorbent body 30. For example, it is formed from a hydrophilic nonwoven fabric.

[0028] (Second-row seat materials) The second sheet 20 contains polyester fiber in a weight ratio of 25% to less than 60%, preferably 30% to 50%. Polyester fiber is heat-resistant and therefore suitable for thermocompression bonding, and is also suitable for quickly diffusing body fluids into the absorbent body 30 and preventing fluid from returning to the top sheet 10. If the weight ratio of polyester fiber is less than 25%, holes may form in the round seals 51 and 52 during heat sealing by thermocompression bonding, as described below. If the weight ratio is 60% or more, the absorbent article 1 will be stiff and feel poor against the skin.

[0029] Examples of polyester fibers include polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), and polybutylene terephthalate (PBT). Among these, polyethylene terephthalate (PET) is preferred because it has a high melting point and can withstand heat and pressure bonding.

[0030] The second sheet 20 may be made of synthetic fibers other than polyester fibers, such as polyolefin fibers, such as polyethylene fibers and polypropylene fibers.

[0031] (Second-row seat fineness) The fineness of the second sheet 20 is 1.8 dtex or more and 9.0 dtex or less, and preferably 3.6 dtex or more and 9.0 dtex or less. If the fineness is less than 1.8 dtex, bodily fluids may not be sufficiently diffused, resulting in a slow absorption rate, while if it exceeds 9.0 dtex, the absorbent article 1 may be stiff and have an inferior feel against the skin, and the adhesive strength between the top sheet 10 and the second sheet 20 at the round seals 51, 52 may be poor.

[0032] (Top sheet to second sheet fineness ratio) The fineness of the second sheet 20 is at least 1 time but less than 3 times, and preferably at least 2 times but less than 3 times, the fineness of the top sheet 10. If the fineness is less than 1 time, there is a risk of increased return of fluid after absorbing body fluids, and if it is 3 times or more, the adhesive strength between the top sheet 10 and the second sheet 20 at the round seals 51, 52 will be poor.

[0033] (Ground weight of second seat) The basis weight of the second sheet 20 is 18 g / m 2 More than 40g / m 2 Less than 22 g / m is preferred 2 More than 38g / m 2 More preferably, the basis weight is 18 g / m 2 If the basis weight is less than 40 g / m, the feel of the absorbent article 1 will be poor. 2 If it exceeds this, the adhesive strength between the top sheet 10 and the second sheet 20 at the round seals 51, 52 may be reduced.

[0034] (Second-row seat manufacturing method) The nonwoven fabric of the second sheet 20 is manufactured by the air-through method, similar to the top sheet 10. By using a nonwoven fabric manufactured by the air-through method, it is possible to obtain the effect of preventing the skin from getting wet, becoming stuffy, and rubbing. Note that the manufacturing method for the air-through method may be any generally known technology.

[0035] [Back seat] The backsheet 40 is a liquid-impermeable sheet that prevents body fluids held by the absorber 30 from leaking to the clothing. Examples of the substrate include a resin film and a composite sheet that is a laminate of a resin film and a nonwoven fabric. The nonwoven fabric used in the composite sheet may be made by any method, and examples thereof include single-layer nonwoven fabrics such as spunbonded nonwoven fabrics and meltblown nonwoven fabrics, composite nonwoven fabrics such as spunbonded nonwoven fabric / meltblown nonwoven fabric laminates, and spunbonded nonwoven fabric / meltblown nonwoven fabric / spunbonded nonwoven fabric laminates, as well as composite materials thereof. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, and composite films of polyethylene and polypropylene.

[0036] The back sheet 40 is preferably breathable to prevent stuffiness during wear. Breathability can be achieved, for example, by blending a filler into the resin film of the base material or by embossing the back sheet 40. Calcium carbonate can be used as the filler, and any known blending method can be used without limitation.

[0037] [Absorbent] In this embodiment, the absorbent body 30 is interposed between the second sheet 20 and the back sheet 40, and has the property of absorbing and retaining, for example, bodily fluids that have permeated the top sheet 10 and the second sheet 20. The absorbent body 30 contains, for example, absorbent fibers and superabsorbent polymers (hereinafter also referred to as "SAP") as an absorbent base material.

[0038] (absorbent fiber) The absorbent fibers are not particularly limited as long as they are generally used in absorbent articles such as sanitary napkins, disposable diapers, and urine absorption pads (urine absorption pads), and examples thereof include fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, and hydrophilic nonwoven fabrics. Among these, fluff pulp is preferred from the viewpoint of absorbency. Examples of fluff pulp include wood pulp (for example, bleached coniferous kraft pulp (N-BKP) such as southern pine and Douglas fir), synthetic fibers, resin fibers, and cotton-like defibrated materials such as non-wood pulp. When fluff pulp is used as the absorbent fiber in the absorber 30, the basis weight of the absorbent fiber is, for example, 100 g / m 2 More than 800g / m 2 The following range or 225g / m 2 More than 725g / m 2 This allows the fabric to absorb more body fluids without compromising the feel against the skin.

[0039] (Superabsorbent polymer) The superabsorbent polymer is not particularly limited as long as it can absorb body fluids and prevent backflow, and examples thereof include polyacrylates, polyaspartates, (starch-acrylic acid) graft copolymers, (acrylic acid-vinyl alcohol) copolymers, (isobutylene-maleic anhydride) copolymers, and saponified products thereof. Among these, from the viewpoint of absorption per weight, polyacrylates are preferred, alkali metal polyacrylates are more preferred, and sodium polyacrylate is even more preferred. The superabsorbent polymers can be used alone or in combination of two or more.

[0040] The superabsorbent polymer is used in the form of particles, fibers, etc., but is preferably used in the form of particles from the viewpoint of ease of handling, etc. In this case, by avoiding the use of a finely powdered superabsorbent polymer that has poor flowability as a powder and using a superabsorbent polymer with a median particle size, basic absorption performance can be improved and the rough feel caused by the hardness of the absorbent body 30 can be reduced. The median particle size of the superabsorbent polymer is, for example, in the range of 50 μm to 600 μm or in the range of 100 μm to 500 μm.

[0041] In the absorbent body 30, the absorbent fibers and SAP may be in the form of a mixture of absorbent fibers and SAP particles, or may be in the form of an SAP sheet in which SAP particles are fixed between absorbent fibers. Furthermore, to prevent leakage of the SAP particles and stabilize the shape of the absorbent body 30, carrier sheets (not shown) may be provided above and below the absorbent body 30. The substrate of the carrier sheet may be any hydrophilic material, such as tissue, absorbent paper, hydrophilic nonwoven fabrics such as air-laid nonwoven fabrics, and porous films such as porous polyethylene films. When multiple carrier sheets are provided, the substrates of the multiple carrier sheets may be the same or different.

[0042] [Round sticker] As shown in Figures 1 and 2, the absorbent article 1 of the present invention has a top sheet 10, a second sheet 20 and a back sheet 40 that are heat-pressed along the width direction at both longitudinal ends of the absorbent article 1, thereby forming round seals 51 and 52 and fixing each sheet in place.

[0043] The dimensions of each of the round seals 51, 52 are preferably 4 mm to 12 mm in the longitudinal direction and 25 mm to 90 mm in the width direction. By keeping the dimensions of the seal portions of the round seals 51, 52 within these ranges, sufficient adhesive strength can be ensured between the top sheet 10 and the second sheet 20 in the absorbent article 1.

[0044] The round seals 51, 52 are formed by applying pressure to the top sheet 10, the second sheet 20, and the back sheet 40 by heat embossing. The embossed pattern of the round seals 51, 52 may be a checkerboard pattern, a dot pattern, other polygonal patterns, pictures, or the like.

[0045] <Method for manufacturing absorbent articles> The absorbent article 1 can be manufactured by a known manufacturing method, for example, by the following method. (Step 1) Step of stacking the top sheet 10, the second sheet 20, the absorbent body 30, and the back sheet 40 in the thickness direction (Step 2) A step of forming round seals 51, 52 around the edges of the top sheet 10, the second sheet 20, and the back sheet 40 using heat and pressure bonding.

[0046] Although the present invention has been described above using embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments and examples. It will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. Furthermore, it is clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention. [Example]

[0047] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the examples shown below.

[0048] Example 1 In Example 1, the top sheet was made of a material containing 30% by weight of polyethylene terephthalate and 70% by weight of polyethylene fiber, with a fineness of 2 dtex and a basis weight of 25 g / m 2 The second sheet was made of an air-through nonwoven fabric consisting of 50% by weight of polyethylene terephthalate and 50% by weight of polyethylene, with a fineness of 6 dtex and a basis weight of 30 g / m 2 An air-through nonwoven fabric with a basis weight of 30 g / m was used as the backsheet. 2The breathable polyethylene film was used, and superabsorbent polymer (SAP) was used as the absorbent. The top sheet, second sheet, and back sheet were each cut to the shape shown in Figure 1, measuring 270 mm in the longitudinal direction and 105 mm in the transverse direction.

[0049] A total of 12 g of superabsorbent polymer (SAP) and fluff pulp was layered on the back sheet in an area of 200 mm longitudinally and 80 mm transversely, then a second sheet was layered, and then a top sheet was layered on top of that.

[0050] Then, as shown in Figure 2, both ends of the top sheet, second sheet and back sheet were aligned, and they were heat-pressed along the short sides of both longitudinal ends so that the seal width was 7 mm in the longitudinal direction and 65 mm in the transverse direction at a temperature of 200°C for a time of 0.01 seconds under constant conditions of the embossing roll clearance, to form a round seal, and an absorbent article was obtained.

[0051] (Example 2, Comparative Examples 1 to 4) Under the conditions shown in Table 1, and by the same manufacturing method as in Example 1, the absorbent articles shown in Example 2 and Comparative Examples 1 to 4 were produced.

[0052] The following evaluation tests were carried out on the obtained absorbent articles of Examples 1 and 2 and Comparative Examples 1 to 4. The results are shown in Table 1.

[0053] (Feel of absorbent articles) The softness and smoothness of the surface of the prepared absorbent article were evaluated by 20 monitors according to the following criteria. ○: 11 to 20 people who felt that the surface of the absorbent article was soft and smooth ×: 10 or less people felt that the surface of the absorbent article was soft and smooth

[0054] (Round sticker with holes) Twenty-five of the manufactured absorbent articles were prepared, and the round seals at 50 locations were visually inspected for the presence or absence of holes and evaluated according to the following criteria. ○: Less than 10 out of 50 round stickers have holes ×: There are 10 or more holes in the round stickers out of 50

[0055] (Adhesive strength of round sticker) Three absorbent articles were prepared and the adhesive strength of the round seal was measured using a Tensilon universal material testing machine. The measurement method involved cutting the absorbent article to fit the width of the round seal, and removing all components except the top sheet, second sheet, and back sheet to prepare the measurement sample. The top sheet was clamped between one grip and the second sheet and back sheet between the other grip, and a 180° longitudinal peel test (tensile speed 500 mm / sec, measurement temperature 20°C, humidity 60%) was performed to measure the adhesive strength between the top sheet and the second sheet, with the maximum load point being the adhesive strength. Table 1 shows the average measured values for three absorbent articles.

[0056] [Table 1]

[0057] As a result, as shown in Table 1, the absorbent articles of Examples 1 and 2 all had a good feel to the skin, prevented holes from forming in the round seal, and had excellent adhesive strength of the round seal. In contrast, the absorbent articles of Comparative Examples 1 to 4 were inferior in some of the evaluation items.

[0058] As described above, according to this embodiment, the absorbent article of the present invention can provide an absorbent article that is pleasant to the touch, does not develop holes in the round seal, and has sufficient adhesive strength, even when multiple nonwoven fabrics with high fiber density and bulk are bonded together with a round seal formed by thermal pressing. [Explanation of symbols]

[0059] 1. Absorbent articles 10 Topsheet 20 Second seat 30 absorber 40 Back Seat 51, 52 round stickers

Claims

1. An absorbent article comprising a liquid-permeable top sheet provided on the skin-contacting surface side in the thickness direction of the absorbent article, a liquid-permeable second sheet adjacent to the top sheet, a liquid-impermeable back sheet provided on the non-skin-contacting surface side in the thickness direction, and an absorbent body disposed between the second sheet and the back sheet, the top sheet, the second sheet, and the back sheet are fixed together by round seals formed by heat-compression bonding along the width direction at both ends of the longitudinal direction of the absorbent article, The top sheet and the second sheet each contain polyester fibers in a weight ratio of 25% or more and less than 60%; the top sheet is made of an air-through nonwoven fabric having a fineness of 1.8 dtex or more and 3.0 dtex or less, The second sheet is made of an air-through nonwoven fabric having a fineness of 1.8 dtex or more and 9.0 dtex or less, An absorbent article characterized in that the fineness of the second sheet is at least 1 time but less than 3 times the fineness of the top sheet.

2. 2. The absorbent article according to claim 1, wherein the dimensions of each of the round seals are 4 mm to 12 mm in the longitudinal direction and 25 mm to 90 mm in the width direction.

3. The top sheet has a basis weight of 18 g / m ２ 30g / m or more ２ Hereinafter, the basis weight of the second sheet is 18 g / m ２ 40g / m or more ２ 2. The absorbent article of claim 1, wherein:

Images