JP3427525B2 - Absorbent articles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to absorbent articles, such as diapers, pads for incontinence, sanitary napkins, bed sheets, and the like, and more specifically, liquid-permeable top sheets. And an absorbent article having a liquid-retaining absorber and a liquid-impermeable backsheet.

[0002]

2. Description of the Related Art A disposable diaper, which is one of conventional absorbent articles, comprises a cotton-like pulp, a super absorbent polymer, a liquid-permeable top sheet and a liquid-impermeable back sheet. It has a structure in which an absorbent body made of a hydrophilic sheet or the like is arranged, and urine is absorbed by the absorbent body through the surface sheet. At this time, the absorbent body needs to receive urine or body fluid and hold the skin without conversely re-wetting, but as the absorbent body, a mixture of cotton-like pulp and a superabsorbent polymer is used alone, or There is a cotton pulp on top, but the speed until the liquid is completely absorbed (hereinafter called the absorption speed)
However, the return of urine and body fluid from the absorber to the surface (hereinafter referred to as wet back) is also poor. This makes the user uncomfortable and in the case of infants also contributes to skin irritation.

Various methods have been proposed to solve these problems. For example, regarding the absorption rate, the top liquid permeable top sheet is made as hydrophilic as possible, thinned, or provided with pores, and the density of the upper flocculent pulp is lowered as much as possible to 0.08 to 0.1.
It is known that the surface property of the cotton-like pulp is made as hydrophilic as possible by adjusting it to g / cm ³ . In order to reduce the wet-back, the porous liquid-permeable sheet is made as hydrophobic as possible, it is made to have a certain thickness, etc., and it is carried out by a device to accelerate the diffusion of the liquid in the layer of cotton-like pulp, Specifically, it has been proposed to dispose a perforated partition layer between fluff pulps (JP-A-61-186505). In addition to the proposal concerning the above properties, a porous structure is arranged between the top sheet and the back sheet (JP-A-60-2534).
47), the density of the upper flocculent pulp is 0.03 to 0.
Down to 07 g / cm ³ (JP-A-56-85401)
Issue)), but the biggest drawback of these is
Among the above-mentioned elements, a phenomenon is observed in which the absorption rate is particularly low, and the element does not absorb and leaks in practical use.

[0004]

In the conventional disposable diaper described above, the spot absorption and absorption speed for absorbing urine and body fluid of the top sheet are small, and the dry touch property of the top sheet is small. However, there was a problem that it was not so good.

An object of the present invention is to solve the above problems. That is, it is an object of the present invention to provide an absorbent article which has a large spot absorption property or absorption speed for absorbing urine or body fluid of the top sheet into the absorbent body and remarkably improves the dry touch property of the top sheet.

[0006]

SUMMARY OF THE INVENTION The present invention has an absorbent body between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a second layer between the top sheet and the absorbent body. In the absorbent article in which the sheets are arranged, the top sheet is made of hydrophilic fibers having a basis weight of 10 to 40 g / m ² and a fiber diameter of constituent fibers of 4 denier or less, and the second sheet has a fiber diameter of 1. 5-10 denier, length 10-10
The 0 mm hydrophilic fibers are fused at the intersections to maintain the web form, the thickness under load of 12 g / cm ² is 0.3 to 3.0 mm, and the average density is 0.01 to 0.05.
g / cm ³ , and further, the front side of the second sheet in contact with the top sheet has a higher density than the back side of the second sheet in contact with the absorber. Further, in the present invention, the second sheet contains a circular cross-section fiber, and a modified cross-section fiber in at least one of a front surface side of the second sheet and a back surface side of the second sheet in an amount of 10 to 80% by weight based on a total solid content. In an absorbent article characterized by:

The present invention relates to an absorbent article having an absorbent body between a liquid-permeable top sheet and a liquid-impermeable back sheet, which has a second sheet between the top sheet and the absorbent body. Moreover, the web form of the second sheet has a lower density on the back surface side than on the front surface side. That is, the back surface of the top sheet is in contact with the dense portion of the second sheet, and the surface of the absorber is in contact with the coarse density portion of the second sheet, so that urine and body fluids in the top sheet are in contact with the second sheet. First, the spot is quickly absorbed and passes at a high speed, and then, in the second sheet, it is immediately diffused and reaches the absorber. Therefore, urine, body fluid, etc. do not stagnate on the top sheet and the second sheet, and the dry touch property of the top sheet is significantly improved.

Hereinafter, the absorbent article of the present invention will be described in detail with reference to the drawings using a diaper that is used as an example, but the present invention is not limited thereto.

As shown in FIG. 3, the disposable diaper of the present invention has a top sheet 1, a second sheet 2 and a back sheet 3 which will be described later, and an absorbent body 4 therebetween. The back sheet 3 is made of a liquid impermeable film such as polyethylene, a material obtained by laminating a liquid impermeable film with a non-woven fabric, a woven fabric or the like. The absorbent body 4 is sandwiched between the top sheet 1 and the back sheet 3 and comprises a cotton-like pulp 5, a super absorbent polymer 6, a hydrophilic sheet 7, a heat-fusible substance 8 and the like.
It is not particularly limited.

Top Sheet The top sheet used has a basis weight of 10 to 40 g / m ^2.
The constituent fibers are hydrophilic fibers having a fiber diameter of 4 denier or less. A liquid-permeable nonwoven fabric, woven fabric, or the like is used. More specifically, polypropylene, polyethylene, polyester, or a composite fiber composed of two or more components such as polyester, polypropylene, and polyethylene may be used,
Especially, polyester / polyester, polyester /
Polyethylene and polypropylene / polyethylene composite fibers are preferable in terms of strength, but are not particularly limited. When the basis weight of the top sheet exceeds 40 g / m ² , urine and body fluids are retained on the top sheet, and the surface of the top sheet is considerably damp to the touch, which is unpleasant for the user and is not preferable. . Also, if a fiber larger than 4 denier is used, the surface the user touches is
It becomes "rough" and "chunky" and becomes uncomfortable to the touch.

Second seat The second sheet has a fiber diameter of 1.5-10 denier and length
Hydrophilic fibers of 10 to 100 mm are fused at the intersections and the
12g / cm while maintaining the shape² Under weight
Thickness is 0.3-3.0mm, 12g / cm² Weight
The average density below is 0.01-0.05 g / cm³ so
Yes, second sheet in contact with top sheet
The front side of the second sheet is in contact with the absorber and the back side of the second sheet
It has a higher density. Average density of the second seat
Degree is 0.05g / cm³ Above, the effect on absorption rate
Not suitable because you can't see it. Also, 0.01 g / c
m ³ At less than 2, the density on the surface side of the second sheet becomes high.
Area is reduced and urine and body fluids are removed from the top sheet.
It can't be absorbed and leaks easily. Also, 12 g / cm
² The thickness of the second sheet under load is 3.0 mm
If it gets thicker than that, urine and body fluids will be absorbed from the top sheet.
Can not be absorbed quickly and leaks easily. Also, 0.3
If it is less than mm, it has no effect on the absorption rate, so it is appropriate.
There is no.

In the present invention, the fibers used for the second sheet include polypropylene, polyethylene, polyester, polyester, polypropylene,
A composite fiber composed of two or more components such as polyethylene may be used, and particularly a composite fiber of polyester / polyester, polyester / polyethylene, polypropylene / polyethylene is preferable from the viewpoint of strength. As a hydrophilic treatment method for these fibers and conjugate fibers, there is a method of applying a hydrophilizing agent to the fibers and conjugate fibers by spraying, or a method of treating the produced second sheet by spray application, foam coating, impregnation, or the like.

Further, in the present invention, the cross-sectional shape of the fiber used for the second sheet is a circular cross-section fiber,
At least one of the front surface side and the back surface side of the second sheet contains modified cross-section fibers in an amount of 10 to 80% by weight based on the total solid content,
Its cross-sectional shape is diverse. The rear surface side contains more modified cross-section fibers than the front surface side, and preferably the back surface side only. By containing a large amount of modified cross-section fibers on the back surface side, a fiber having a lower density on the back surface side than on the front surface side can be obtained. For this reason, for example, in the case of the same denier, since the modified cross-section fiber has a larger cross-sectional area than the circular cross-section fiber, the density becomes low when the modified cross-section fiber is included. There is also a method in which the fiber diameter of the modified cross-section fiber is larger than that of the circular cross-section fiber. If the modified cross-section fiber is less than 10% by weight based on the total solid content, it is not suitable because the absorption rate has no effect. If the modified cross-section fiber exceeds 80% by weight based on the total solid content, the density of the surface side is reduced, and the urine or body fluid cannot be quickly absorbed from the top sheet, resulting in easy leakage. More specifically, the modified cross-section fibers include polypropylene, polyethylene, polyester, acrylic resin, nylon resin and the like, and the cross-sectional shape thereof is preferably T-shaped, W-shaped, H-shaped, rhombic, amoeber-shaped, etc. It is not particularly limited.

As a manufacturing method thereof, the density of the second sheet in contact with the back surface of the top sheet is higher than that of the back surface of the second sheet in contact with the surface of the absorber so that the second sheet has different densities. It is also one in which webs are stacked so that the surface side has a higher density and are integrated by heat or the like. The front layer and the back layer are integrated into one layer by stacking two kinds of webs forming both layers and welding the fibers by heat treatment. Other bonding methods include bonding by binder treatment, high-speed water jetting, and needle treatment, but are not particularly limited. Also, without using two kinds of webs, a high temperature is applied to the front part of the web in a single layer so that the fibers do not melt, and a high density layer is formed. There is also a heat treatment method for applying a layer having a low density.

Further, as shown in FIGS. 1 and 2, the second sheet is located in the region above the absorber, and its size is
It may be equal to or smaller than the absorber. If the user knows where to excrete, only that part may be installed.

Absorber The absorbent used is a mixture of cotton-like pulp and superabsorbent polymer uniformly, and is wrapped with a hydrophilic sheet. Alternatively, 3 to 60% by weight of the heat-fusible substance may be mixed with the cotton-like pulp and thermocompression-bonded. As the cotton-like pulp, a fiber length of 5 obtained by defibrating a chemical pulp sheet or a mechanical pulp sheet with a crusher
mm or less. As the pulp material, not only softwood but also hardwood, straw, bamboo and kefna are applied.
The amount of the pulp used varies depending on the intended absorber, for example, it is used alone, a plurality of layers are used, or other absorbents are used in combination, but generally 50
To 400 g / m ² .

As the superabsorbent polymer, starch type,
Cellulose type and synthetic polymer type are mentioned. That is, starch-acrylic acid (salt) graft copolymer, saponification product of starch-ethyl acrylate graft copolymer, saponification product of starch-methyl methacrylate acid graft copolymer, saponification product of starch-acrylonitrile graft copolymer. , Saponified starch-acrylamide graft copolymer, saponified starch-acrylonitrile-2-acrylamido-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, acrylic acid cross-linked poly Examples include cross-linked products of ethylene oxide and sodium carboxymethyl cellulose, and cross-linked products of polyvinyl alcohol-maleic anhydride reaction products. It absorbs more than 20 times its own weight of urine, body fluid and water, and sodium polyacrylate type is most suitable from the viewpoint of absorption performance. The distribution amount of the superabsorbent polymer is 10 to 500%, preferably 15% of the total weight of the cotton-like pulp in a dry state.
˜300%, and such amount of superabsorbent polymer is substantially evenly distributed in the flocculent pulp. When the super-absorbent polymer absorbs and swells, its mutual interference is minimized, and it rarely forms a permeation barrier through continuous contact, and permeates and absorbs urine and body fluid in three dimensions. .

The heat-fusible substance is preferably fibrous in consideration of mixing with the cotton-like pulp. Examples of the heat-fusible substance include polypropylene, polyethylene, polyester, polyvinylidene, acrylic resin, nylon resin and the like. Alternatively, a composite fiber composed of two or more components such as polyester, polypropylene and polyethylene may be used, and in particular, a composite fiber of polyester / polyester, polyester / polyethylene and polypropylene / polyethylene is preferable from the viewpoint of strength. The fiber diameter is preferably about 1 to 5 denier, and the fiber length is 3 to 30 mm, which is suitable for mixing with the cotton-like pulp, but is not particularly limited. By thermocompression-bonding these mat layers at a pressure of a certain level or higher, a skeletal structure of a heat-fusible substance is formed, and the mat layer itself can have strength even when wet. The method of thermocompression bonding is not particularly limited, such as a hot press roll, a hot air dryer, a microwave heater, an infrared heater, etc., but heat is evenly transferred to the mat layer, and the heat fusible substance melts to form a skeletal structure. It is good if it can be formed.

The hydrophilic sheet may be a hydrophilic sheet such as tissue, absorbent paper, hydrophilic non-woven fabric or the like. As a method of compressing the absorber, a continuous surface may be used so that the density of the absorber is substantially uniform by a roll having a smooth peripheral surface, or the peripheral surface may be uneven. The density of the absorbent body may partially differ depending on the roll or the like, and the embossing may be a pattern arrangement that guides urine or body fluid in the vertical and diagonal directions. In the case of embossing, the compressed part and the non-compressed part may be continuous or discontinuous.

The top sheet and the second sheet, and the second sheet and the absorbent body are adhered to each other by hot melt adhesion or the like partially or partially, and the adhesive agent is water-soluble such as starch type or CMC (carboxymethyl cellulose). It may be a glue or a highly fluid adhesive. The effect of the present invention can be achieved only when the above-described top sheet, second sheet and absorber are combined.

As shown in FIG. 3, a liquid permeable top sheet.
An absorbent article having an absorbent body 4 between a sheet 1 and a liquid impermeable back sheet 3 has a second sheet 2 between the top sheet 1 and the absorbent body 4 and further has the second sheet 2 Has a higher density on the front surface than on the back surface. That is, the second sheet 2 is provided on the back surface of the top sheet 1.
Since the dense portion of the second sheet 2 is in contact with the surface of the absorbent body 4 and the coarse density portion of the second sheet 2 is in contact with the surface of the absorbent body 4, urine or body fluid in the top sheet 1 that comes into contact with the wearer's skin is The spot is quickly absorbed and passes at a high speed, and then, in the second sheet 2, it is immediately diffused and reaches the absorber. Therefore, urine, body fluid, etc. do not stagnate in the top sheet 1 and the second sheet 2, and the dry touch property of the top sheet 1 is significantly improved.

[0022]

EXAMPLES The effects of the present invention will be described in detail below with reference to examples. The evaluation was performed on the absorption rate, wet back, and sensation of salat. The size of the used diaper is 30 × 40 cm (length) on the outer side and 15 × 35 cm (length) on the sandwiched absorber. The absorption rate here is the time until 50 cc of artificial urine is used and absorbed into the diaper, and is measured three times every 30 minutes. In addition, the wet back means that after measuring the absorption rate (using 50 cc absorbed 3 times) and leaving the diaper for 30 minutes, use it and stack 10x10 cm square filter paper on the center of the diaper. After applying pressure of 0.05 kg / cm2 for 5 minutes,
The amount of liquid transferred to the filter paper is measured. The salat feeling was determined by measuring the absorption rate (absorbing 50 cc three times), then lightly touching the topsheet surface with a hand, and the dryness (salat feeling) was judged by sensory evaluation. The judgment criteria were divided into the following three stages (○, Δ, ×). Sarat feeling judgment criteria ○: Dry △: Wet ×: Quite damp The artificial urine used here is as follows. Artificial urine composition (% by weight) Urea 1.9% NaCl 0.8% CaCl2 0.1% MgSO4 0.1% The balance is water

[0023]

Example 1 A topsheet having a basis weight of 25.0 g / m ² was obtained by using a composite fiber of polyester / polyethylene having a fiber diameter of 2 denier and a fiber length of 51 mm as the hydrophilic sheet.

Second sheet As a front side web of the second sheet, a web produced by using 100% by weight of a circular cross-section fiber of hydrophilic polyester / polyethylene composite fiber having a fiber diameter of 2 denier and a fiber length of 51 mm, and a thickness of 0.40 mm. , Basis weight 12.0 g / m
² , with a density of 0.030 g / cm ³ and a backside web,
50% by weight of hydrophilic polyester / polyethylene composite fiber with a circular cross section fiber having a fiber diameter of 2 denier and a fiber length of 51 mm, and 50% by weight of hydrophilic polyester fiber having a fiber diameter of 4 denier and a W-shaped cross section fiber with a fiber length of 51 mm. The web produced after mixing the, thickness 0.53 mm, basis weight 1
Using 2.0 g / m ² and a density of 0.023 g / cm ³ , a web weight ratio of 1: 1 on the front and back was heat treated at 150 ° C. for 15 seconds to melt-bond a part of the polyethylene of the composite fiber. , A thickness of 0.93 mm, a basis weight of 24.0 g / m ² , and an average density of 0.026 g / cm ³ were obtained.

The absorbent cotton-like pulp 200 g / m ^2, heat consists superabsorbent polymer 200 g / m ^2, and polyester / polyester consisting of sodium polyacrylate fusible substance 20 g /
Wound with m ² uniformly distributed was wrapped in tissue and adjusted with a hot press roll with a surface temperature of 150 ° C. so that the overall tightness of the absorber was 0.10 g / m ³ to obtain an absorber. .
Next, a disposable diaper having the structure shown in FIGS. 2 and 3 having the absorbent body between the top sheet and the back sheet made of polyester and having the second sheet between the top sheet and the absorbent body is prepared. did.

[0026]

[Example 2] As the front side web of the second sheet, a web produced by using the same fibers as in Example 1 and having a thickness of 0.
40 mm, basis weight 24.4 g / m ² , density 0.061 g /
cm ³ and a web produced by replacing the W-shaped cross-section fiber with the T-shaped cross-section fiber as the back side web, thickness of 0.64 m
A diaper was prepared for use in the same manner as in Example 1 except that m, basis weight 24.4 g / m ² and density 0.038 g / cm ³ . The second sheet obtained had a thickness of 1.04 m.
m, basis weight 48.8 g / m ² , average density 0.047 g / c
It was m ³ .

[0027]

Example 3 A diaper was prepared for use as in Example 1, except that the heat-fusible substance was not used as the absorber.

[0028]

[Example 4] As the front side web of the second sheet, a web produced by using the same fibers as in Example 1 and having a thickness of 1.
40 mm, basis weight 38.4 g / m ² , density 0.027 g /
cm ^3, and a web manufactured using the same fibers as in Example 1 as the backside web, thickness 1.54 mm, basis weight 3
A diaper was prepared for use in the same manner as in Example 1 except that 8.4 g / m ² and a density of 0.025 g / cm ³ were used. In addition, the obtained second sheet has a thickness of 2.94 m.
m, basis weight 76.8 g / m ² , average density 0.026 g / c
A second sheet of m ³ was obtained.

[0029]

Example 5 A web manufactured using the same fibers as in Example 1 as the front side web of the second sheet, having a thickness of 0.
15 mm, basis weight 9.7 g / m ² , density 0.065 g / c
m ^3, and a web manufactured using the same fibers as in Example 1 as the back side web, thickness 0.25 mm, basis weight 9.7
A diaper was prepared for use in the same manner as in Example 1 except that g / m ² and a density of 0.039 g / cm ³ were used. A second sheet having a thickness of 0.40 mm, a basis weight of 19.4 g / m ² and an average density of 0.049 g / cm ³ was obtained.

[0030]

[Comparative Example 1] A web produced by using the same fibers as in Example 1 as the front side web of the second sheet, having a thickness of 0.
12 mm, basis weight 10.0 g / m ² , density 0.083 g /
cm ³ and a composite fiber having a circular cross section with a fiber diameter of 2 denier and a fiber length of 51 mm, made of polyester / polyethylene, without using a W-shaped cross section fiber for the back side web.
Web produced using 100% by weight, thickness 0.12m
A diaper was prepared for use in the same manner as in Example 1 except that m, basis weight 10.0 g / m ² , and density 0.083 g / cm ³ . The obtained second sheet has a thickness of 0.24 mm,
Basis weight 20.0 g / m ² , average density 0.083 g / cm ³
Met.

[0031]

[Comparative Example 2] As a second sheet, on the front side web,
Fiber diameter 2 made of hydrophilic polyester / polyethylene
Neil, 3 composite fibers with a circular cross section of 51 mm fiber length
0% by weight, fiber diameter 4 denier, fiber length 51 mm
70 weight of hydrophilic polyester fiber having W-shaped cross section
Web produced after mixing 1%, thickness 1.11 m
m, basis weight 10.2 g / m², Density 0.009g / cm
³And the back side web has a fiber diameter of 4 denier and a fiber length of 51
1 mm of hydrophilic polyester fiber having a W-shaped cross section of mm
Web produced using 100% by weight, thickness 1.10m
m, basis weight 10.2 g / m ², Density 0.009g / cm³To
Use a web weight ratio of 1: 1 on the front and back of 150
Heat treatment at ℃ for 15 seconds, a part of polyethylene of composite fiber
Example 1 except that was replaced with a melt-bonded web.
In the same manner, a used diaper was produced. Obtained seca
The band sheet has a thickness of 2.21 mm and a basis weight of 20.4 g / m.
² , Average density 0.009 g / cm³ Met.

[0032]

[Comparative Example 3] As the second sheet used in Example 1,
A diaper was prepared for use in the same manner as in Example 1 except that the front side web and the back side web were used in the opposite manner. That is, the back sheet of the top sheet is in contact with the low density portion of the second sheet, and the front surface of the absorber is in contact with the high density portion of the second sheet. The obtained second sheet has a thickness of 0.93 mm and a basis weight of 24.0 g / m.
² and the average density was 0.026 g / cm ³ .

[0033]

[Comparative Example 4] A web produced by using the same fibers as in Example 1 as the front side web of the second sheet, having a thickness of 0.
36 mm, basis weight 24.4 g / m ² , density 0.068 g /
cm ^3, and a web manufactured using the same fibers as in Example 1 as the back side web, thickness 0.40 mm, basis weight 2
A diaper was prepared for use in the same manner as in Example 1 except that 4.4 g / m ² and a density of 0.061 g / cm ³ were used. The obtained second sheet had a thickness of 0.76 mm, a basis weight of 48.8 g / m ² , and an average density of 0.064 g / cm ³ .

[0034]

[Comparative Example 5] A diaper was prepared for use in the same manner as in Example 1 except that a top sheet having a basis weight of 60 g / m ² was used.

[0035]

Comparative Example 6 A diaper was prepared for use in the same manner as in Example 1 except that the second sheet was not used. The test results are shown in Table 1.

[0036]

[Table 1]

As shown in Table 1, the performance of Comparative Examples 1 to 6 was considerably poorer than that of Examples 1 to 5.

[0038]

As described above, the present invention provides an absorbent article having an absorbent body between a liquid permeable top sheet and a liquid impermeable back sheet, wherein the top sheet and the absorbent body are A second sheet is provided between the second sheet and the second sheet, and the surface of the second sheet has a higher density than the back surface. That is, since the high density portion of the second sheet is in contact with the back surface of the top sheet, and the low density portion of the second sheet is in contact with the surface of the absorber, the urine in the top sheet that touches the skin of the wearer And body fluids
The second sheet is quickly spot-absorbed and passes at a high speed, and then, in the second sheet, it is immediately diffused to reach the absorber. Therefore, there is an effect that urine, body fluid and the like do not stagnate on the top sheet and the second sheet, and the dry touch property of the top sheet is significantly improved.

[Brief description of drawings]

The figure shows an embodiment of an absorbent article according to the present invention.

FIG. 1 shows a partially cutaway plan view of a disposable diaper of the present invention.

FIG. 2 shows an embodiment different from FIG. 1 of the disposable diaper of the present invention.

FIG. 3 is a view of the disposable diaper according to the present invention shown in FIG.
The X'line sectional drawing is shown.

[Explanation of symbols] 1. Liquid permeable top sheet 2. Second seat 3. Liquid impermeable backsheet 4. Absorber 5. Cotton pulp 6. Super absorbent polymer 7. Hydrophilic sheet 8. Heat fusible material 9. Stretchable elastic body

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Hirai No. 10-6, 1st Town, Shinonome, Koto-ku, Tokyo Shin-Oji Paper Co., Ltd. Tokyo Commodity Research Institute (56) Reference JP-A-4-24026 (JP, A) JP-A-1-292104 (JP, A) JP-A-61-141361 (JP, A) JP-A-4-75655 (JP, A) Actually open 3-33622 (JP, U) Actually open 6 −38998 (JP, U) Special table 8-511443 (JP, A) Special table 9-503944 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61F 13/15- 13/84 A61F 13/511 A61F 5/44

Claims (2)

(57) [Claims] 1. An absorbent article having an absorbent body between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a second sheet being arranged between the top sheet and the absorbent body. In, the top sheet has a basis weight of 10 to 40 g.
/ M ² , the fiber diameter of the constituent fibers is 4 denier or less, and the second sheet has a fiber diameter of 1.5 to 1
Hydrophilic fibers of 0 denier and length of 10 to 100 mm are fused at the intersection to maintain the web form, and 12 g /
The thickness is 0.3 to 3.0 mm under a cm ² load, the average density is 0.01 to 0.05 g / cm ³ , and the surface side of the second sheet in contact with the top sheet is the absorber. An absorbent article having a higher density than the back surface side of the second sheet in contact with. 2. The second sheet comprises a circular cross-section fiber and 10 to 80% by weight of the modified cross-section fiber with respect to the total solid content on at least one of the front surface side of the second sheet and the back surface side of the second sheet. The absorbent article according to claim 1, which is characterized in that.