JP2006014889A - Body fluid absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently exhibit a function as a second sheet and prevent "sticking" by forming embossment on a surface sheet. <P>SOLUTION: The subject body fluid absorbent article is provided with the surface sheet 1, a liquid permeable material 20 including a fiber assembly composed of rattan and having body fluid permeability, and an absorbent element AB having body fluid retentive property in this order. A second surface side sheet 10 is interposed between the surface sheet 1 and the liquid permeable material 20 having the body fluid permeability in a positional relation of overlapped on at least a part of the liquid permeable material having the body fluid permeability, and the surface sheet 1 and the second surface side sheet 10 are integrally embossed, and the liquid permeable material 20 having the body fluid permeability is not embossed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a body fluid absorbent article that can be applied to absorbent articles such as paper diapers, sanitary napkins, urine pads, and incontinence pads. Particularly preferred is a sanitary napkin.

  Absorbent articles such as disposable diapers, sanitary napkins, urine-absorbing pads, and incontinence pads are generally body fluid-absorbing articles having an absorbent element having body fluid retention properties under a surface sheet. Conventionally, such an absorbent element having fluid retention is formed of, for example, a pulp material such as cotton-like pulp or synthetic pulp, or a material in which an absorbent polymer in the form of granular powder is mixed in fluffy pulp. It was. However, since the absorbent material made of these materials has a low speed of absorbing body fluid, the body fluid may move to the end of the article before being absorbed by the absorbent element, and leakage may occur from the end. there were.

  Therefore, in recent years, a non-woven sheet or the like is interposed as a so-called second sheet between the top sheet and the absorbing element having body fluid retention, and the body fluid is quickly transmitted to the absorbing element side, thereby moving the body fluid to the end. As a result, a structure having a function of preventing end leakage of body fluid is widely used.

  On the other hand, Patent Document 1 discloses a technique in which a continuous fiber layer made of tow is bonded as a second sheet using a bonding pattern (see, for example, Patent Document 1). Compared with the conventional form, this one has significantly improved functions as a second sheet.

However, if a continuous fiber layer made of tow is bonded to the front and back by, for example, an embossing pattern, the embossing reduces the space between the fibers, impedes the permeability of the body fluid, and temporarily accepts the received body fluid. It has been found that the ability to store is reduced, and the function as the original second sheet is not fully exhibited.
JP 2001-524399 A

  The main problem to be solved by the present invention is to prevent “burst” by forming an emboss on the top sheet while fully functioning as a second sheet.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A body fluid-absorbing article comprising a topsheet, a liquid-permeable material having body fluid permeability including a fiber assembly made of tow, and an absorbent element having body fluid retention,
Between the surface sheet and the liquid-permeable material having body fluid permeability, a second surface-side sheet is interposed in a positional relationship where at least a part of the liquid-permeable material having body fluid permeability overlaps,
The body fluid-absorbing article, wherein the top sheet and the second top sheet are integrally embossed, and the fluid-permeable material having body fluid permeability is not embossed.

[Invention of Claim 2]
The body fluid absorbent article according to claim 1, wherein each area of the second surface side sheet and the liquid-permeable material having body fluid permeability is smaller than each area of the absorbent element having surface sheet and body fluid retention.

[Invention of Claim 3]
The body fluid-absorbing article according to claim 1 or 2, wherein the constituent fiber of the fiber assembly made of tow is a fiber of cellulose acetate.

[Invention of Claim 4]
A method for producing a body fluid-absorbing article comprising a topsheet, a liquid-permeable material having body fluid permeability including a fiber assembly made of tow, and an absorbent element having body fluid retention, in order,
In the liquid absorbent article, the second surface-side sheet has a positional relationship in which the liquid-permeable material having fluid permeability is at least partially overlapped between the surface sheet and the liquid-permeable material having fluid permeability. Intervened;
Embossing the top sheet and the second top side sheet together,
On the other hand, arranging the body fluid permeability,
Arranging the absorbent element having the body fluid retention property;
In order, the manufacturing method of the bodily fluid absorption article | item characterized by having.

  When the surface sheet is a flat surface, when the skin of the wearer is in contact, particularly when the skin with sweat is in contact with the surface sheet, the skin becomes crisp and the feeling is extremely deteriorated. However, by forming a concave surface on the surface sheet by embossing according to the present invention, the contact area between the skin and the surface sheet is reduced, and it is possible to prevent cracking. In the present invention, the top sheet and the second top sheet are integrally embossed. The surface sheet is required to be as flexible as possible from the viewpoint of touch. However, it is difficult to form a large or deep emboss when the emboss is formed on a thin surface sheet that emphasizes flexibility. On the other hand, when both the top sheet and the second top sheet are integrally embossed, embossing with a necessary size and depth can be formed.

  Furthermore, when the nonwoven fabric sheet etc. which are used for the conventional general purpose 2nd sheet | seat etc. are used as a 2nd surface side sheet | seat, a 2nd surface side sheet | seat promotes permeation | transmission of a bodily fluid and prevents a reverse.

  The present invention sequentially includes a liquid-permeable material having a body fluid permeability including a fiber assembly made of tow and an absorbent element having a body fluid holding property on the back surface side with respect to the second surface-side sheet.

  When the body fluid that has passed through the top sheet and the second top side sheet reaches a fluid-permeable material that has body fluid permeability including a fiber assembly made of tow, the body fluid is permeable to body fluid because it has a large space between the fibers. In addition, since the fibers are oriented in a substantially uniform direction, the absorbent element having excellent fluid diffusibility and body fluid retention ability can sufficiently absorb body fluid.

  In addition, since the liquid volume which has a body fluid permeability including the fiber assembly which consists of a tow has a large space volume between fibers, it is excellent in cushioning properties.

Embodiments of the present invention will be described below.
[Use]
The bodily fluid absorbing article of the present invention can be applied to general articles that absorb bodily fluids such as urine and blood. Examples of this type of body fluid absorbent article include paper diapers, sanitary napkins, urine-absorbing pads, and incontinence pads. In particular, it is optimally applied to sanitary napkins.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to application examples to sanitary napkins shown in the accompanying drawings.
FIG. 1 shows a body fluid absorption side surface of the sanitary napkin according to the present invention in a developed state, and FIG. 2 shows an exaggerated cross section taken along line 2-2 in FIG. This sanitary napkin quickly penetrates the menstrual blood, or the like, and the back sheet 2, such as a polyethylene sheet, a polypropylene sheet, or a liquid-impervious back sheet 2 made of an outer nonwoven fabric and a liquid-impervious sheet. And a liquid-permeable topsheet 1 to be made. In the center in the width direction between the two sheets 1 and 2, there is an absorbent core 4 made of cotton-like pulp or synthetic pulp, and the absorbent core provided as necessary for maintaining the shape of the absorbent core 4 and improving diffusibility. 4 and the crepe paper 5 which wraps 4 is interposed in the absorption element AB which has the retention property of a bodily fluid. A main body that exhibits the function of receiving and holding such body fluid is formed in the center of the product.

  In the present embodiment, the top sheet 1 has a shape showing an area larger than the absorbent element AB, and is disposed so as to cover the entire surface of the absorbent element AB. The liquid-impervious back sheet 2 has the same shape as the planar shape of the product, and both side portions thereof extend laterally from both side edges of the absorbent element AB, and the entire surface side of this extended portion The side sheets 6 and 6 made of a liquid-impervious or hardly liquid-permeable non-woven fabric are laminated and bonded so as to cover the surface. As this joining method, bonding with a hot melt adhesive, ultrasonic sealing, thermal fusion, thermocompression bonding, or a combination thereof can be employed.

  In particular, as shown in the figure, the peripheral edge of the product, specifically, the free edge of the laminated portion of the back sheet 2 and the side sheets 6, 6, and the front and rear ends of the liquid-permeable surface sheet 3 and the liquid-impervious back sheet 2 The edges are preferably joined firmly by heat sealing b1, b2.

  In the present embodiment, the crotch portion and the hip portion of the laminated portion of the liquid-impervious back sheet 2 and the side sheets 6 and 6 are greatly extended to the side of the absorbent element AB, and these extended portions A folded flap part F1 and a hip cover flap part F2 are formed. These flap portions are provided as necessary and can be omitted.

  On the other hand, as shown in the figure, it is also possible to provide side-leakage barriers 30 and 30 extending in the product longitudinal direction on both sides of the product. In the illustrated form, the other end portions of the side sheets 6 and 6 extending in the product longitudinal direction are free ends, and the elastic elastic members 32 and 32 are fixed to the free end side portions under extension along the longitudinal direction. Has been. And the longitudinal direction front-and-rear end part of the product of these side sheets 6 and 6 is mutually joined in the folded state, and it is not joined in the intermediate part. Thus, in use, as shown in FIG. 2, the intermediate portions of the side sheets 6 and 6 stand up due to the contraction force of the elastic elastic members 32 and 32, and function as the menstrual blood side leakage prevention barriers 30 and 30.

  In the present invention, as shown in FIG. 2, a sanitary napkin comprising a top sheet 1, a liquid-permeable material 20 having a body fluid permeability including a fiber assembly made of tow, and an absorbent element AB having a body fluid retaining property in this order. I will provide a.

  Furthermore, between the surface sheet 1 and the liquid-permeable material 20 having body fluid permeability, the second surface-side sheet 10 is interposed in a positional relationship at least partially overlapping with the liquid-permeable material 20 having body fluid permeability, The topsheet 1 and the second topsheet 10 are integrally embossed E, and the liquid-permeable material having body fluid permeability is not embossed.

  And each area of the 2nd surface side sheet | seat 10 and the liquid-permeable material 20 which has a humor permeability is small with respect to each area of the absorption element AB which has a surface sheet 1 and a humor retainability.

  The constituent fiber of the fiber assembly made of tow is preferably a cellulose acetate fiber.

  In the napkin having such a configuration, when the top sheet 1 is a flat surface, when the skin of the wearer is in contact, particularly when the skin with sweat is in contact, the skin becomes crisp and the touch is extremely deteriorated. By forming the concave surface on the top sheet 1 by E, the contact area between the skin and the top sheet is reduced, and it is possible to prevent the cracking. Further, the top sheet 1 and the second top sheet 10 are integrally embossed E. When both the top sheet 1 and the second top sheet 10 are embossed together, embossing with a required size and depth can be formed. Furthermore, when the nonwoven fabric sheet etc. which are used for the conventional general purpose 2nd sheet | seat are used as the 2nd surface side sheet | seat 10, a 2nd surface side sheet | seat promotes permeation | transmission of a bodily fluid and prevents a reverse.

  Moreover, in the structure which equips the back surface side with respect to the 2nd surface side sheet | seat 10 in order with the liquid-permeable material 20 which has the body fluid permeability | transmittance containing the fiber assembly which consists of a tow, and the absorption element 4 which has liquid retention property, it is a surface sheet. When the body fluid that has passed through the first and second surface-side sheets 10 reaches the fluid-permeable material 20 having body fluid permeability including a fiber assembly made of tow, the body fluid passes through the body fluid because it has a large space between the fibers. In addition, since the fibers are oriented in a substantially uniform direction, the absorbent element having excellent fluid diffusibility and body fluid retention ability can sufficiently absorb body fluid.

  Here, as shown in the enlarged view in FIG. 2, it is more desirable that the front side sheet 10 protrudes to the back side by embossing, and further protrudes to the back side of the front side sheet 10 formed by embossing. It is particularly desirable that the portion (convex portion) that is present is substantially in contact with the liquid-permeable material 20 having fluid permeability that includes a fiber assembly made of tow.

  In such a form, the body fluid tends to move to the back surface side mainly through the embossed portion E, and it is difficult for the body fluid to remain on the flat portion of the topsheet 1, so that it is possible to prevent the flaking. However, the part (convex part) which protrudes in the back surface side of the surface side sheet | seat 10 formed by the embossing is substantially contacting with the liquid permeable material 20 which has the body fluid permeability containing the fiber assembly which consists of tows. And the body fluid that tends to shift to the back side mainly through the embossed portion E quickly migrates to the liquid-permeable material 20 having the body fluid permeability, and the fluid-permeable material 20 having the body fluid permeability has excellent body fluid permeability. Therefore, the body fluid can be quickly transferred to the absorption element AB through these passages. If embossing is also formed on the liquid-permeable material 20 having body fluid permeability, the density of the compacted portion due to the embossing of the liquid-permeable material 20 becomes high, so that the portion protruding to the back side of the front sheet 10 ( Even if the convex portion is substantially in contact with the liquid permeable material 20, the transfer rate of the body fluid from the portion (convex portion) protruding to the back surface side of the top sheet 10 into the liquid permeable material 20 is slow. Therefore, the speed of shifting to the absorption element AB becomes slow, and the absorption speed is reduced. For this reason, the particular advantages of the illustrated embodiment will be apparent.

  In order to manufacture such a napkin, as shown in FIG. 3, the top sheet 1 is fed out from the unlealer, the side sheet 6 is fed out from the unreeler as necessary, and the second top sheet 10 is fed out from the unreeler. The embossing roller 50 embosses the top sheet 1 and the second top sheet 10. The embossing roller 50 can take an appropriate form such as a combination of a concavo-convex roller and a rubber roller, or embossing by engaging the concavo-convex rollers with each other, but at least the topsheet 1 is processed with embossing.

  A liquid-permeable material 20 having body fluid permeability including a fiber assembly made of tow is supplied while being fed to the surface of the integrated topsheet 1 and second topside sheet 10 while being held by a suction roller. Is done. Thereafter, the cotton-like pulp constituting the absorbent core 4 is fed out and laminated, and thereafter or in an appropriate process, cutting and individualization are performed to produce a product.

[Material of each component]
Here, each material will be described sequentially.
(Fiber assembly made of tow)
The fiber assembly made of tow is made of tow (fiber bundle) made of fibers (manufactured using tow as a raw material). Examples of tow fibers include polysaccharides or derivatives thereof (cellulose, cellulose ester, chitin, chitosan, etc.), synthetic polymers (polyethylene, polypropylene, polyamide, polyester, polylactamamide, polyvinyl acetate, etc.), and the like. In particular, cellulose esters and cellulose are preferable.

  As cellulose, cellulose derived from plants such as cotton, linter, and wood pulp, bacterial cellulose, and the like can be used. Regenerated cellulose such as rayon may be used, and the regenerated cellulose may be a spun fiber. The shape and size of cellulose is a continuous fiber that can be regarded as a substantially infinite length and has a long diameter of several millimeters to several centimeters (for example, 1 mm to 5 cm), and a particle diameter of about several microns (for example, 1 to 100 μm). Can be selected from various sizes up to a fine powder. Cellulose may be fibrillated, such as beaten pulp.

  Examples of the cellulose ester include organic acid esters such as cellulose acetate, cellulose butyrate, and cellulose propionate; mixed acid esters such as cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and cellulose nitrate acetate; polycaprolactone graft Cellulose ester derivatives such as hydrogenated cellulose ester can be used. These cellulose esters can be used alone or in admixture of two or more. The viscosity average degree of polymerization of the cellulose ester is, for example, about 50 to 900, preferably about 200 to 800. The average substitution degree of the cellulose ester is, for example, about 1.5 to 3.0 (for example, 2 to 3).

  The average degree of polymerization of the cellulose ester can be, for example, 10 to 1000, preferably 50 to 900, more preferably about 200 to 800, and the average degree of substitution of the cellulose ester is, for example, about 1 to 3, preferably 1 to 1. 2.15, more preferably about 1.1 to 2.0. The average degree of substitution of the cellulose ester can be selected from the viewpoint of enhancing biodegradability.

  As the cellulose ester, an organic acid ester (for example, an ester with an organic acid having about 2 to 4 carbon atoms), particularly cellulose acetate is suitable. This is because cellulose acetate can particularly increase the porosity and is suitable for increasing the absorption capacity of body fluids. Specifically, for example, the porosity (capacity of the void / capacity of the entire absorbent material) can be preferably 60 to 85%, and more preferably 75 to 85%.

  The degree of acetylation of cellulose acetate is often about 43 to 62%, but about 30 to 50% is particularly preferable because it is excellent in biodegradability.

  The tow constituent fiber may contain various additives such as a heat stabilizer, a colorant, an oil agent, a yield improver, a whiteness improver, and the like.

  The fineness of the tow constituent fibers can be, for example, about 1 to 16 denier, preferably about 1 to 10 denier, and more preferably about 2 to 8 denier. The tow constituent fiber may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimp of the crimped fibers can be, for example, 5 to 75, preferably 10 to 50, and more preferably 15 to 50 per inch (2.54 cm). Further, a crimped fiber that is uniformly crimped is often used. When crimped fibers are used, a bulky and light absorbent material can be manufactured, and a tow with high integrity can be easily manufactured by entanglement between the fibers.

  The cross-sectional shape of the tow constituting fiber is not particularly limited, and may be any one of, for example, a circular shape, an oval shape, an irregular shape (for example, a Y shape, an X shape, an I shape, an R shape) or a hollow shape. Also good.

The tow constituent fibers are used, for example, in the form of tows (fiber bundles) formed by bundling about 3,000 to 1,000,000, preferably about 5,000 to 1,000,000 single fibers. can do. The fiber bundle is preferably formed by bundling about 3,000 to 1,000,000 continuous fibers.

  Since the tow has weak entanglement between fibers, it is preferable to use a binder having an action of adhering or fusing the contact portions of the fibers in order to secure a wide gap even when the absorption of body fluid is repeated.

  The binder includes triacetin, triethylene glycol diacetate, triethylene glycol dipropionate, dibutyl phthalate, dimethoxyethyl phthalate, citric acid triethyl ester, and other plastic resins, as well as various resin adhesives, especially thermoplastic resins. Can be used.

  The thermoplastic resin is a resin that exhibits an adhesive force when melted and solidified, and includes a water-insoluble or hardly water-soluble resin and a water-soluble resin. A water-insoluble or poorly water-soluble resin and a water-soluble resin can be used together as necessary.

  Examples of water-insoluble or hardly water-soluble resins include olefinic homo- or copolymers such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, polyvinyl acetate, polymethyl methacrylate, methacryl Acid methyl-acrylic acid ester copolymer, acrylic resin such as copolymer of (meth) acrylic monomer and styrene monomer, polyvinyl chloride, vinyl acetate-vinyl chloride copolymer, polystyrene, styrene monomer ( Styrenic polymers such as copolymers with (meth) acrylic monomers, optionally modified polyesters, nylon 11, nylon 12, nylon 610, nylon 612 and other polyamides, rosin derivatives (eg, rosin esters), Hydrocarbon resin (for example, terpene resin Dicyclopentadiene resin, petroleum resin), and hydrogenated hydrocarbon resins. One or two or more of these thermoplastic resins can be used.

  Examples of water-soluble resins include various water-soluble polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl ether, vinyl monomers, and copolymerizable monomers having a carboxyl group, a sulfonic acid group, or a salt thereof. Vinyl water-soluble resins such as copolymers, acrylic water-soluble resins, polyalkylene oxides, water-soluble polyesters, water-soluble polyamides, and the like can be used. These water-soluble resins can be used alone or in combination of two or more.

  Various additives such as stabilizers such as antioxidants and ultraviolet absorbers, fillers, plasticizers, preservatives, and antifungal agents may be added to the thermoplastic resin.

  The fiber assembly can be produced by a known method using tow as a raw material, and at that time, it can be opened in a strip shape so as to have a desired size and bulk as necessary. The opening width of the tow is arbitrary and can be, for example, about 100 to 2000 mm, preferably about 150 to 1500 mm. It is preferable to open the tow because it becomes easier to move the absorbent polymer described later. In addition, the porosity of the absorbent can be adjusted by adjusting the degree of tow opening.

  Tow opening methods include, for example, a method in which tow is spread over a plurality of opening rolls, and the tow width is gradually expanded as the tow progresses, and tow tension (elongation) and relaxation (contraction) And the like, and a method of widening and opening using compressed air can be used.

  FIG. 4 is a schematic view showing an example of a fiber opening facility. In this example, the tow 21 that is the raw fabric is sequentially fed out, and in the process of transporting, the widening means 22 using compressed air and a plurality of spread nip rolls 23, 24, and 25 whose peripheral speed is faster as the downstream side roll is combined. After passing through the opened portion and widened / opened, the fiber is passed through the binder addition box 26, and the binder is added (for example, the box is filled with mist of triacetin), and the fibers are formed of tow having a desired width and density. The assembly 20 is formed.

(Surface sheet 1)
In the present embodiment, the top sheet has a property of transmitting body fluid. Therefore, the material of the top sheet is sufficient if it exhibits this body fluid permeability, and examples thereof include a porous or non-porous nonwoven fabric and a porous plastic sheet. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. Examples include synthetic fibers such as polyethylene and polypropylene such as olefins, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers in which two or more of these are used. can do. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, and a needle punch method. For example, the spun lace method is a preferable processing method when the flexibility and drape properties are required, and the thermal bond method is the preferable processing method when the bulkiness and softness are required.

  Further, the top sheet may be composed of one sheet or may be composed of a laminated sheet obtained by laminating two or more sheets.

(Absorbing element AB having fluid retention)
In the present embodiment, the absorbent element having body fluid retention has a property of retaining absorbed body fluid. The material of the absorbent material is not particularly limited. For example, well-known raw materials, such as what consists of single pulps, such as cotton-like pulp and synthetic pulp, and what mixed the absorbent polymer made into granular powder etc. in the fluff-like pulp, can be illustrated. Of these, the raw material fibers of the pulp are not particularly limited, and examples thereof include cellulose fibers obtained from wood such as mechanical pulp, chemical pulp, and dissolved pulp, and artificial cellulose fibers such as rayon and acetate. it can. However, the wood used as the raw material for cellulose fibers is more preferable in terms of function and price because conifers have longer fiber lengths than hardwoods.

  A superabsorbent polymer can be contained on the surface and / or inside of the absorbent material.

  As the superabsorbent polymer, a polymer that absorbs and retains body fluid of its own weight, for example, 10 times or more can be used. Examples include starch-based, cellulose-based and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, cross-linked sodium carboxymethyl cellulose and acrylic acid. A (salt) polymer or the like can be used. As the shape of the superabsorbent polymer, a commonly used granular material is suitable, but other shapes can also be used.

  The amount (weight per unit area) of the superabsorbent polymer can be appropriately determined according to the amount of absorption required for the application of the absorbent material. Therefore, although it cannot be said unconditionally, it can be 3 to 400 g / m 2, for example.

(Back sheet 2)
In the present embodiment, the back sheet has a property of not transmitting body fluid. Therefore, the material for the back sheet is sufficient if it exhibits this body fluid impermeability. Non-woven fabrics that are substantially impervious to liquids (in this case, a waterproof film and a non-woven fabric constitute a back sheet that is impermeable to body fluids). Of course, in addition to this, materials having liquid impermeability and moisture permeability, which have been used and used in recent years from the viewpoint of preventing stuffiness, can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given.

(Second surface side sheet 10)
In the present embodiment, the second surface side sheet 10 has body fluid permeability. For example, the same material as the top sheet 1, spunlace, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond, or crepe paper can be exemplified. In particular, an air-through nonwoven fabric and a spunbond nonwoven fabric are preferable.

(Relationship between top sheet 1 and second top sheet 10)
In the present invention, the surface sheet has a basis weight of 8 to 40 g / m 2 and a thickness of 0.2 to 1.5 mm, and the surface sheet 10 has a basis weight of 15 to 80 g / m 2 and a thickness of 0.2 to The range of 3.5 mm is desirable in that embossing can be sufficiently performed under conditions that do not impair liquid permeability.

[Other Embodiments]
In the present invention, various forms can be adopted in addition to the form described above. For example, the second surface-side sheet 10 can be provided over the entire length in the longitudinal direction of the product. The liquid-permeable material 20 having body fluid permeability can be provided over the entire length in the longitudinal direction of the product. Further, the second surface side sheet 10 and / or the liquid-permeable material 20 having a humor permeability are provided in a plurality at intervals in the longitudinal direction of the product or in a plurality of intervals at intervals in the width direction of the product (that is, intermittent arrangement Form).

  On the other hand, as shown in FIGS. 5 to 7 (only the main part is shown), the liquid-permeable material 20 having a body fluid permeability may be laminated in two or more layers, ie, an upper layer 20A and a lower layer 20B. Good. Further, the upper layer 20A and the lower layer 20B may have the same configuration in the width direction (FIG. 6), the upper layer 20A is narrower than the lower layer 20B (FIG. 5), and the upper layer 20A is wider than the lower layer 20B (FIG. 7). it can.

  On the other hand, the positional relationship between the second surface-side sheet 10 and the liquid-permeable material 20 having humor permeability may be any relationship as long as at least a part thereof overlaps in plan view. Desirably, the entire liquid-permeable material 10 having body fluid permeability 10 covers at least 70% or more.

  About the embossing E, it can be set as appropriate shapes, such as an ellipse and a rectangle, besides the circular embossing shown. Furthermore, although it is a dot-like embossing in the form of illustration, a continuous groove-like embossing may be sufficient. When the continuous groove-like emboss is oriented in the longitudinal direction of the product, the body fluid can be guided or diffused along the embossed groove, and the absorption performance of the body fluid is excellent. Further, a plurality of continuous groove-shaped embosses can be formed at intervals in the longitudinal direction of the product or at intervals in the width direction. As an emboss formation region (in the case of dotted embossing, the entire formation region), it is desirable that the entire liquid-permeable material 20 having humor permeability covers at least 70% or more.

It is a top view of the bodily fluid absorption article of a 1st embodiment. It is a cross-sectional schematic diagram of the bodily fluid absorption article of 1st Embodiment. It is a schematic diagram of a manufacturing method and equipment. It is the schematic which shows the manufacturing flow of a fiber assembly. It is a cross-sectional schematic diagram of the bodily fluid absorbent article of other embodiments. It is a cross-sectional schematic diagram of the bodily fluid absorption article of another embodiment. It is a cross-sectional schematic diagram of the bodily fluid absorption article of a modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Top sheet, 2 ... Back sheet, 10 ... 2nd surface side sheet, 20 ... Liquid-permeable material which has liquid permeability, AB ... Absorbing element.

Claims (4)

A body fluid-absorbing article comprising a topsheet, a liquid-permeable material having body fluid permeability including a fiber assembly made of tow, and an absorbent element having body fluid retention,
Between the surface sheet and the liquid-permeable material having body fluid permeability, a second surface-side sheet is interposed in a positional relationship where at least a part of the liquid-permeable material having body fluid permeability overlaps,
The body fluid-absorbing article, wherein the top sheet and the second top sheet are integrally embossed, and the fluid-permeable material having body fluid permeability is not embossed.   The body fluid absorbent article according to claim 1, wherein each area of the second surface side sheet and the liquid-permeable material having body fluid permeability is smaller than each area of the absorbent element having surface sheet and body fluid retention.   The body fluid-absorbing article according to claim 1 or 2, wherein the constituent fiber of the fiber assembly made of tow is a fiber of cellulose acetate. A method for producing a body fluid-absorbing article comprising a topsheet, a liquid-permeable material having body fluid permeability including a fiber assembly made of tow, and an absorbent element having body fluid retention, in order,
In the liquid absorbent article, the second surface-side sheet has a positional relationship in which the liquid-permeable material having fluid permeability is at least partially overlapped between the surface sheet and the liquid-permeable material having fluid permeability. Intervened;
Embossing the top sheet and the second top side sheet together,
On the other hand, arranging the body fluid permeability,
Arranging the absorbent element having the body fluid retention property;
In order, the manufacturing method of the bodily fluid absorption article | item characterized by having.

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