JP2019080907A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which prevents block of a top sheet by a solid content and high viscosity component and is likely to cause leakage even with respect to an absorption object of high viscosity to be body fluid, such as excreta like loose passage or watery stool and menstrual blood, with a simple structure.SOLUTION: An absorbent article has a top sheet composed of through-air unwoven fabric containing composite fiber and an absorber arranged under the top sheet. The top sheet is an absorbent article arranged with a side low in fiber density of the through-air unwoven fabric as the skin side. With respect to the through-air unwoven fabric, in fiber density expressed by the number of fibers per unit area, proportion of fiber density on the side arranged on the absorber side of the absorbent article and fiber density on the side arranged on the skin side of the absorbent article is 1.5 or larger.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent article for absorbing bodily fluids such as excrement such as soft stools and menstrual blood, for example.

  Conventionally, as absorbent articles such as disposable diapers, those having a top sheet in direct contact with the skin and permeable to excrement fluid such as urine and an absorber on the back side and retaining the excrement fluid are widely used. There is.

  The top sheet of the absorbent article is mainly made of through-air non-woven fabric. The through-air non-woven fabric is a non-woven fabric which is classified as a thermal bond non-woven fabric and is sometimes referred to as an air-through non-woven fabric, for example, by heat treating a web of composite fibers composed of at least two types of thermoplastic resins having different melting points. can get. As a method of heat-treating the web, for example, a method of thermally bonding fibers to one another by a heat treatment apparatus (for example, a hot-air penetration heat treatment machine, a hot-air blowing heat treatment machine) provided with a conveyance support for supporting and conveying the web It has been known. By blowing hot air from one direction of the web in the heat treatment step, the surface blown with hot air has a low fiber density, and the surface in contact with the opposite conveyance support has a high fiber density. That is, the through-air non-woven fabric is characterized in that the fiber density has a high and low slope in the thickness direction, one surface has a relatively high fiber density, and the other surface has a relatively low fiber density. When the through-air non-woven fabric is used as the top sheet of the absorbent article, it has been arranged so that the surface on the higher density side with a good touch is the surface that contacts the skin.

  Among the absorption targets of absorbent articles, excrement such as soft feces and watery feces, or body fluids such as menstrual blood include solid contents and highly viscous components in addition to liquid. When an absorbent article is used to absorb such excrement, menstrual blood, etc., the solid content and high viscosity component clog the top sheet, and excrement and body fluid remain on the top sheet and the surface thereof Spread and cause a leak to the crotch and back side. Furthermore, there is a problem that when the excrement or body fluid comes in contact with the skin for a long time, it causes troubles such as dermatitis.

With such a background, for example, Patent Document 1 describes an article having an open top sheet as an absorbent article which can improve the permeability of the soft stool in the top sheet and reliably retain the soft stool. There is.
Also, for example, Patent Document 2 describes an absorbent article provided with a pocket for holding excrement.

In addition, for example, in Patent Document 3, an air-laid web or an air-laid web formed from a heat-fusible raw material fiber for the purpose of providing an absorbent article capable of absorbing and holding even a high-viscosity absorbent object An absorbent sheet is disclosed which has at least an absorbent layer of non-woven fabric having a density of 0.003 to 0.05 g / cm ³ and a thickness of 2 mm or more, in which a card web is subjected to hot air treatment.

JP 2007-97643 A Japanese Patent Application Publication No. 2007-90056 JP, 2013-215348, A

  However, the absorbent articles described in Patent Literatures 1 and 2 must be provided with a perforated non-woven fabric or a stool pocket in order to facilitate the penetration of soft stool, which complicates the structure. In addition, there is a problem that the manufacturing cost increases accordingly. On the other hand, the absorbent sheet described in Patent Document 3 is a bulky layer having a low density and a thickness of 2 mm or more, and thus it is not necessarily a highly versatile material to be used as a top sheet.

  In view of such a situation, the object of the present invention is to provide a top structure with a solid content and a high viscosity component for absorbing objects such as excrement such as soft feces and watery feces and body fluids such as menstrual blood while having a simple structure. An object of the present invention is to provide an absorbent article which prevents the sheet from being clogged and is less likely to leak.

  The inventors repeated studies to solve the above-mentioned problems, and by using the side with high fiber density of the top sheet as the side in contact with the skin, solid content and high viscosity substances are concentrated in the part with high fiber density. It was confirmed that the top sheet was clogged due to being trapped by the On the other hand, it is found that the occurrence of the blockage is significantly suppressed by allowing the excrement to pass through from the side of the top sheet where the fiber density is low to the side where the fiber density is high. The present invention has been accomplished based on the finding that the problem can be solved by a simple configuration in which the side of the air through non-woven fabric to be used is arranged so that the low fiber density side is the skin side.

The present invention has the following configuration.
[1] An absorbent article comprising: a top sheet made of through-air non-woven fabric containing composite fibers; and an absorber disposed under the top sheet, wherein the top sheet has a fiber density of the through-air non-woven fabric An absorbent article arranged with the low side as the skin side.
[2] The through-air non-woven fabric is disposed on the skin side of the absorbent article and the fiber density of the side disposed on the absorbent body side of the absorbent article at the fiber density represented by the number of fibers per unit area The absorbent article as described in [1] whose ratio with the fiber density of the side is 1.5 or more.
[3] The through-air non-woven fabric has a fiber density of 30 to 100 fibers / mm ² on the side disposed on the absorbent body side of the absorbent article and a fiber density of 20 to 20 on the side disposed on the skin side of the absorbent article. The absorbent article according to [1] or [2], which is 65 / mm ² .
[4] The absorbent article according to any one of [1] to [3], wherein the fineness of the composite fiber is in the range of 1.0 to 6.0 dtex.
[5] The absorbent article according to any one of [1] to [4], wherein the shape of the composite fiber is an eccentric sheath-core type in a cross section perpendicular to the longitudinal direction.

  According to the present invention having the above-described configuration, sufficient absorbability is also obtained for the absorption target including solid contents and high-viscosity substances such as excrement such as soft feces and watery feces, and body fluids such as menstrual blood. An absorbent article which is resistant to the occurrence of the top sheet clogging and the leak thereof can be realized by a simple configuration. In addition, the fiber density of the through-air non-woven fabric used for the top sheet on the low fiber density side (hereinafter sometimes referred to as low density side) and the fiber density on the high fiber density side (hereinafter sometimes referred to as high density side) By setting the ratio to the density to a certain value or more, the diffusion of the liquid on the top sheet is less, the blockage of the top sheet due to the solid content and the high viscosity component is prevented, the leakage hardly occurs, and the comfort is excellent. An absorbent article can be provided. Further, according to the top sheet used in the present invention, excrement, menstrual blood, etc. can efficiently reach the absorbent body without staying on the surface by one non-woven fabric sheet, regardless of the complicated shape or multilayer structure. Can be guided to be absorbed.

It is a figure showing typically the state of capture | acquisitions, such as solid content in this invention and the conventional top sheet.

Hereinafter, the present invention will be described in detail.
(Structure of absorbent article)
The absorbent article of the present invention is an absorbent article comprising a top sheet made of a through air non-woven fabric containing composite fibers, and an absorbent disposed under the top sheet, wherein the top sheet is a through air non-woven fabric It is arranged so that the side with low fiber density is the skin side, and it has good absorbability and is excellent in its retention also for an absorption object containing solid content or an absorption object with high viscosity. .

(Top sheet)
As a raw material of the through air nonwoven fabric which comprises the top sheet of an absorbent article, the conjugate fiber which has heat adhesiveness is mentioned. The heat-adhesive component of the composite fiber may be a thermoplastic resin component which is heat-melted by passing hot air through the web made of the fiber to form a bonding point. The thermal bonding point of the fibers is formed by melting a thermoplastic resin component having a low melting point by hot air treatment. The resin component constituting the heat-adhesive fiber may, for example, be a polyolefin-based (for example, polypropylene, a copolymer of propylene and propylene [based on propylene as a main component, and other α-olefins; Copolymer, propylene-butene-1 binary copolymer, propylene-hexene-1 binary copolymer, etc., polyethylene etc., polyesters (eg, polyethylene terephthalate), polyamides (eg, nylon 6 etc.) Can be illustrated. Specific examples of combinations of low melting point components and high melting point components in composite fibers include polyethylene (low melting point components) and polypropylene (high melting point components), polyethylene (low melting point components) and polyethylene terephthalate (high melting point components), etc. Particularly preferred in view of bulkiness and non-woven strength are composite fibers made of polyethylene and polyethylene terephthalate.

  Moreover, in addition to the above-described composite fibers having thermal adhesiveness, the web for producing through-air non-woven fabrics may be natural fibers (such as wood fibers), regenerated fibers (such as rayon), semi-synthetic fibers (such as acetate) or chemicals. It may also include fibers that are not so-called heat-adhesive fibers such as fibers, synthetic fibers (polyester, acrylic, nylon, vinyl chloride etc.) (hereinafter referred to as "non-heat-adhesive fibers"). The "non-heat-adhesive fiber" refers to a fiber that does not cause a thermal change (melting or softening) involved in the thermal bonding in the thermal bonding performed when producing a non-woven fabric. When non-heat-adhesive fibers are included, the ratio of non-heat-adhesive fibers to the total weight of the web is not limited as long as the effects of the invention are not impaired, but may be, for example, 1 to 30% by weight. It is 3 to 15% by weight. Within this range, the permeability of soft stools is not inhibited.

  The fineness of the composite fiber is not particularly limited, but is preferably in the range of 1.0 to 6.0 dtex, and more preferably in the range of 2.0 to 5.0 dtex. If it is this range, the touch of the through air nonwoven fabric obtained will become favorable.

The shape of the composite fiber can be exemplified by a concentric sheath-core type, an eccentric sheath-core type, a parallel type, a radial type, etc. in a cross section perpendicular to its longitudinal direction. Being particularly preferred. In the case of a concentric sheath-core type composite fiber or an eccentric sheath-core type composite fiber, it is preferable that the low melting point component is a composite fiber constituting the sheath component and the high melting point component is the core component.
When a composite fiber is used as a raw material and a web is produced by a carding machine, the composite fiber needs to have a crimp. In the case of concentric sheath-core composite fibers, a crimper can apply a mechanical crimp in a zigzag shape. Further, in the case of an eccentric sheath-core type composite fiber, it is possible to apply a mechanical crimp of zigzag shape with a crimper, or to apply a three-dimensional crimp in a stretching or drying process. If the crimp number is 7.0 to 20.0 mountain / 2.54 cm, the passability of the card machine is good, and if it is 11.0 to 16.0 mountain / 2.54 cm, the obtained web Good formation. When a three-dimensional crimp is applied to the eccentric sheath-core type composite fiber, there is no sharp protrusion of the composite fiber such as a zigzag crimp on the surface of the obtained top sheet, and thus the skin irritation is significantly reduced. Because it is preferable.

Basis weight of the through-air nonwoven fabric is not particularly limited as long as can exhibit the effects of the present invention, for example, be a 20 to 40 g / ^{m 2,} and more preferably 25 to 35 g / ^{m 2.} If the fabric weight is 20 g / m ² or more, the retention of solid content in soft stool becomes good. Moreover, if the fabric weight is 40 g / m ² or less, the voids of the non-woven fabric can be sufficiently secured, and the permeability of the soft stool becomes good.

  The thickness of the through-air non-woven fabric is also not particularly limited, but can be, for example, 0.2 to 2.0 mm, and more preferably 0.5 to 1.7 mm. If the thickness is 0.2 mm or more, the effect of the present invention of rapidly moving the absorption target so as not to cause clogging of the top sheet using the high and low inclination of the fiber density in the thickness direction is surely exhibited. Can. If the thickness is 2.0 mm or less, the entire absorbent article can be thinned.

As mentioned above, the through-air non-woven fabric has high and low slopes of fiber density in the thickness direction. In the present specification, the fiber density is represented by the number of fibers per unit area in the cross section of the through air non-woven fabric, and the unit can be, for example, book / mm ² . In the embodiment, a method of measuring the fiber density using a reflection type optical microscope will be described in detail, but in addition to the method adopted in the embodiment, a method using a scanning electron microscope, etc. The method is not particularly limited as long as the fiber density can be calculated by grasping the number of fibers present in

Fiber density of the through-air nonwoven fabric used in the present invention, 20 to 65 present / mm ² in the low-density side, the high-density side is preferably from 30 to 100 present / mm ^2. If the fiber density on the low density side is 20 to 65 fibers / mm ² , it is preferable in terms of suppressing the blockage of the top sheet by the solid content in the soft feces, and the fiber density on the high density side is 30 to 100 fibers / mm ² If it is, it is preferable at the point of the transfer to the absorber side of the liquid in the loose stool. Furthermore, the ratio of the fiber density of the high density side to the low density side is preferably 1.5 or more in (fiber density of high density side) / (fiber density of low density side), and 1.5 to 2 It is more preferable if .0.

  In general, the through-air non-woven fabric is smooth on the surface on the high density side due to its manufacturing process and is excellent in touch. For this reason, when using a through-air non-woven fabric as a top sheet of an absorbent article, conventionally, the surface on the high density side has been used as a surface directly in contact with the skin, that is, the high density side is disposed on the skin side. However, in the present invention, unlike the conventional arrangement, it has been found that the passability of soft feces etc. is extremely improved by arranging the low density side of the through air non-woven fabric on the skin side.

  As shown in FIG. 1 (right figure), when the side with low fiber density is placed as the skin side, the solid content etc. (1) and high viscosity substances contained in soft stool etc. are the low density side of the top sheet surface first The liquid is then transferred from the fiber-fiber gap into the interior of the top sheet with the liquid and captured at a location according to its size. Moreover, what passed through the top sheet without being captured by the top sheet reaches the absorber. On the other hand, as shown in FIG. 1 (left view), when the side with high fiber density is disposed on the skin side as in the prior art, the fiber spacing on the surface of the top sheet is small. ) Are intensively captured on the surface of the top sheet and near the surface, and the top sheet is clogged, which is considered to cause leakage.

  A deodorizing component, an anti-allergen component, an antibacterial component, a wetting component, a moisturizing component and the like can be added to the top sheet used in the present invention as long as the effects of the present invention are not impaired. These components are attached to the top sheet by spraying or the like, incorporated into at least one of the thermoplastic composite fibers of the composite fibers contained in the through-air non-woven fabric constituting the top sheet, or attached to the fiber surface It can be provided by a method or the like.

(Absorbent articles)
The absorbent article of the present invention is used, for example, as a diaper such as a disposable diaper, a urine pad, a menstrual blood absorption pad and the like. The absorbent article of the present invention may have a conventionally known configuration, except that the surface with low fiber density of the above-mentioned through-air non-woven fabric as the top sheet is used as the skin side. Specifically, for example, the following configuration It can be done.

  The absorbent article includes a top sheet, an absorbent body, and a waterproof back sheet. A top sheet can use one sheet of the above-mentioned through air nonwoven fabric as a top sheet. On the lower surface side of the top sheet, an absorber for mainly absorbing and holding water such as excrement is disposed. The absorber is typically constituted by an absorbent material. As an absorptive material, the well-known absorptive material which can be used for absorptive articles, such as a disposable diaper, can be used. Specifically, fluff pulp, super absorbent polymer (SAP), hydrophilic sheet and the like can be mentioned, and one or more of them can be used.

  As the fluff pulp, those obtained by fibrillating wood pulp or non-wood pulp into a cotton-like shape are preferable. As SAP, sodium polyacrylate is preferred. As the hydrophilic sheet, in addition to tissue paper and absorbent paper, non-woven fabric can be used. In the case of using a non-woven fabric, one having been subjected to a hydrophilization treatment is preferred. In addition, as a measure against shape loss, it may include synthetic fibers such as heat-fusion fibers. These materials may be used alone or in combination. For example, as a preferable absorbent material, a combination of about 10 to 500 parts by mass of SAP per 100 parts by mass of fluff pulp may be mentioned. Be

  The absorber is usually used in the form of a monolayer or multilayer mat. When fluff pulp and SAP are used in combination, the SAP may be uniformly mixed in the fluff pulp mat, or may be arranged in layers between multiple layers of fluff pulp. In addition, when SAP is used as an absorber in this manner, the entire intermediate layer is covered with a hydrophilic sheet in order to prevent the leakage of SAP from the intermediate layer and to provide shape stability to the intermediate layer. It is preferable to do.

  On the lower surface side of the absorber, a waterproof back sheet is provided in order to prevent the object to be absorbed from leaking to the outside of the absorbent article. A back sheet is the layer which forms the outermost layer of an absorptive article, and when a wearer wears an absorptive article, it is a layer located in a wearer's clothes side. As a material which comprises a back sheet, the liquid impermeable film etc. which consist of resin, such as polyethylene, can be mentioned, for example, It is preferable to use a microporous polyethylene film especially. The microporous polyethylene film is formed by forming a large number of fine pores of 0.1 to several μm and has liquid impermeability but moisture permeability. It can prevent internal stuffiness.

  A cover made of paper cloth, woven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, etc. is provided on the outermost surface of the back sheet to further reinforce by providing a waterproof film, or to improve the feel during use. A sheet may be provided. Among them, spunbonded nonwoven fabrics are suitably used in terms of strength and cost.

  In addition, the absorbent article may have a fixing means for preventing displacement of the absorbent article. As a fixing means, an adhesive tape etc. are mentioned, for example, One or more places are provided in the outermost surface of an absorptive article. In addition, for example, an elastic band, an elastic tape, a gather for forming a three-dimensional shape, and the like can have any of various configurations according to the purpose.

(Production method)
The top sheet used in the absorbent article of the present invention is a through air non-woven fabric, and can be produced by appropriately selecting known production methods and conditions of through air non-woven fabrics.
For example, short fibers obtained by cutting a tow made of composite fibers as a raw material into appropriate fiber lengths are subjected to carding to obtain a carded web of composite fibers. Subsequently, the card web is placed on a conveyance support (belt conveyor) and fed into the heat treatment apparatus. In the heat treatment apparatus, heating is performed to a temperature at which only the low melting point resin of the composite fiber is melted, and the melted low melting point resin adheres to each other (heat bonding), whereby the fiber intersections fuse to form a three-dimensional structure. A through-air non-woven fabric is produced. Since the heating is generally performed by the blowing of hot air, fiber concentration occurs downstream of the blowing direction of the hot air. Typically, since hot air is blown from above the transport support, the fiber density of the side of the card web in contact with the transport support is relatively high, and the surface side of the card web is relatively low.

  The composite fiber used as a raw material is a short fiber which cut the tow which consists of a composite fiber (2.6 dtex) of polyethylene / polyethylene terephthalate, for example, and set fiber length to 45 mm. The fabric weight of the non-woven fabric can be adjusted by the amount of composite fiber input to the carding machine, and the thickness of the through-air non-woven fabric and the inclination (difference in density) of the fiber density in the thickness direction can be controlled by the blowing speed or temperature of the hot air. The blowing amount and temperature of the hot air can be appropriately selected according to the speed of the transport support, the desired physical properties of the through air non-woven fabric, and the characteristics of the raw material resin, but for example, the blowing speed is 0.3 to 3.0 m / sec. It can be 130 to 160 ° C.

  The invention will now be described in more detail by way of examples, which are for illustrative purposes only. The scope of the present invention is not limited to this embodiment.

The measuring method and definition of the physical-property value used by the Example and the comparative example are shown below.
<Calculation of ratio of fiber density>
The nonwoven fabric is cut to a width of 0.5 mm in the direction (CD direction) perpendicular to the direction in which the fibers are arranged (MD direction), and the low density side obtained by dividing the cross section into two in the thickness direction is A part, high density side Is part B. For each of the parts A and B, the number of fibers per area was counted using a reflective optical microscope, and this was taken as the fiber density. The fiber density of each of the A part and the B part was obtained by measuring and averaging three parts of each of the A part and the B part. In Examples 1 to 3, the A part (low density side) is the skin side, and the B part (high density side) is the absorber side. In Comparative Examples 1 to 3, the B part was the skin side, and the A part was the absorber side. A value obtained by dividing the fiber density on the absorber side by the fiber density on the skin side was taken as the ratio of the fiber density of the non-woven fabric.

<Number of crimps>
The number of crimps of the composite fiber was determined in accordance with JIS L1015.

<Weight of nonwoven fabric>
Three non-woven fabrics were cut out in a 10 cm × 10 cm square, each weight was measured, converted to a unit area, and the average value of the obtained values was obtained by rounding off the first decimal place.

<Thickness of non-woven fabric>
A pressure of 343.2 Pa (3.5 g / cm ² ) was applied by a pressure probe (load) with a diameter of 35 mm using “Digisickness Tester” (trade name) manufactured by Toyo Seiki Co., Ltd., and the thickness at that time was measured. Three non-woven fabrics were cut out in a square of 10 cm × 10 cm, and five samples were measured.

<Production of artificial soft stool>
The flow rate test and the diffusion area were measured using artificial soft feces. First, an artificial urine of the following composition was prepared, and then the artificial urine was used to prepare an artificial soft stool.
1. Artificial urine composition:
(1) 2.00% by weight of urea
(2) Sodium chloride 0.80% by weight
(3) 0.08% by weight of magnesium sulfide heptahydrate
(4) Calcium chloride dihydrate 0.03% by weight
(5) Ion-exchanged water 97.09% by weight
2. Artificial soft stool composition:
(1) artificial urine 98.89% by weight
(2) Carboxymethylcellulose sodium 1.00% by weight
(3) crushed pulp 0.10% by weight
(4) Acid Blue 9 0.01% by weight

<Flow rate test>
A hole of 3.4 cm in diameter was made at the center of an acrylic plate of 9 cm long and 9 cm wide, and an acrylic cylinder with an inner diameter of 3.4 cm was attached to the hole to obtain a cylindrical device for liquid velocity test. A two-sheet Kim Towel (registered trademark) made by Nippon Paper Crease Co., Ltd. is used as an absorbent body, a top sheet is stacked thereon, a cylindrical device is placed on the center of it, and 20 g / s of artificial soft stool is used. It injected at speed. The time until the entire top sheet surface appeared after measuring the artificial soft stool was measured, and the time was taken as the soft stool passing time.

<Diffusion area>
After the above liquid flow time measurement, the cylindrical device was removed, the area where the liquid diffused to the top sheet was measured, and this value was defined as the diffusion area.

<Touch evaluation>
The touch of the surface to be disposed on the skin side of the top sheet was subjected to sensory evaluation as follows.
:: feeling tingling, feeling sloppy ○: feeling tingling, feeling sloppy feeling a little チ: feeling tingling, feeling a little greasy, slightly anxious ×: feeling tingling, feel gritty, irritated become

Example 1
Polyethylene having a melting point of 130 ° C. and a melt mass flow rate of 16 g / 10 min. In the sheath, and polypropylene having a melting point of 160 ° C. and a melt mass flow rate of 20 g / 10 min. A concentric sheath-core type heat-adhesive composite fiber having a cut length of 51 mm and a zigzag shape and having 15.0 crimps / 2.54 cm was used. The composite fiber was made into a web by carding method. The hot air is passed through the obtained web using a hot air circulating suction band dryer at 134 ° C. to bond the interfiber interlacing points that make up the web, and the fiber density ratio is 1.9, the fabric weight is 25 g / m ² A through air non-woven fabric having a thickness of 1.5 mm was produced. The low density side of the through air non-woven fabric was used as the top sheet (skin side) as the top sheet. The soft stool passage time of this top sheet was 76 seconds, the diffusion area was 26 cm ² , and the touch evaluation was ○.

[Example 2, Comparative Examples 1 and 2]
A top sheet described in Table 1 was obtained in the same manner as in Example 1 using the concentric sheath-core heat-adhesive conjugate fiber described in Table 1. The results evaluated in the same manner as Example 1 are shown in Table 1.
In Example 2, the surface on the low density side of the through air non-woven fabric was used as the top sheet (the skin side) as the top surface. In Comparative Examples 1 and 2, the surface on the high density side of the through air non-woven fabric was used as the top sheet (skin side). The reason why the touch does not change between Example 2 and Comparative Example 2 (back and forth of the non-woven fabric) is presumed to be that the touch is reduced even on a high density surface because the fineness is increased.

[Example 3, Comparative Example 3]
A top sheet described in Table 1 was obtained in the same manner as in Example 1 using the eccentric sheath-cored heat-adhesive conjugate fiber described in Table 1. The results evaluated in the same manner as Example 1 are shown in Table 1.
In Example 3, the surface on the low density side of the through-air non-woven fabric was used as the top sheet (skin side) as the top surface. In Comparative Example 3, the surface on the high density side of the through air non-woven fabric was used as the top sheet (skin side).

As shown in Table 1, in all of Examples 1 to 3 in which the surface on the low density side of the through air non-woven fabric was used as the skin side, the soft stool passage time was short and the diffusion area was also small. There was also no problem with the touch.
In Comparative Examples 1 to 3 in which the surface on the high density side of the through air non-woven fabric was used as the skin side, it was confirmed that the soft stool passage time is long, the diffusion area is large, and clogging on the top sheet surface is likely to occur.

  The absorbent article of the present invention is used as a diaper such as a disposable diaper, a urine pad, a menstrual blood absorption pad and the like. Further, the top sheet used in the present invention can be used not only for the above-mentioned sanitary materials but also for filters and the like because it has a good flow rate.

1 Solid content, etc.

Claims (5)

An absorbent article comprising: a top sheet made of a through air non-woven fabric containing composite fibers; and an absorbent body disposed below the top sheet, wherein the top sheet is the side where the fiber density of the through air non-woven fabric is low. An absorbent article arranged as a skin side. In the through-air non-woven fabric, in the fiber density represented by the number of fibers per unit area, the fiber density of the side disposed on the absorbent body side of the absorbent article and the fiber of the side disposed on the skin side of the absorbent article The absorbent article according to claim 1, wherein the ratio to the density is 1.5 or more. The through air non-woven fabric has a fiber density of 30 to 100 fibers / mm ² on the side disposed on the absorbent body side of the absorbent article, and a fiber density of 20 to 65 fibers on the side disposed on the skin side of the absorbent article The absorbent article of Claim 1 or ² which is mm2. The absorbent article according to any one of claims 1 to 3, wherein the fineness of the composite fiber is in the range of 1.0 to 6.0 dtex. The absorbent article according to any one of claims 1 to 4, wherein the shape of the composite fiber is an eccentric sheath-core type in a cross-sectional shape perpendicular to the longitudinal direction.