CN101892557A

CN101892557A - Absorbability article

Info

Publication number: CN101892557A
Application number: CN2010101849012A
Authority: CN
Inventors: 佐藤迪子
Original assignee: Daio Paper Corp
Current assignee: Daio Paper Corp
Priority date: 2009-05-22
Filing date: 2010-05-21
Publication date: 2010-11-24
Anticipated expiration: 2030-05-21
Also published as: CN101892557B; KR20100126197A; JP5436044B2; KR101728913B1; JP2010269029A

Abstract

The present invention provides an absorbability article, having an upper sheet material made of cotton fibre with a good skin feel, and capable of ensuring sufficient waterproofness of the upper sheet material and preventing the surface from residual liquid. Said upper sheet material is made of hydro-entangled nonwoven fabric which is composed of 40-100 wt% cotton fibre and 60-0 wt% synthetic fiber. The nonwoven fabric is provided with a plurality of through openings, and waterproof agent is coated on one side or two sides. A water absorption degree (JIS L 1907Byreck method) of a skin contact surface of the sheet material is set 0-5mm.

Description

Absorbent commodity

Technical field

The present invention relates to a kind of sanitary napkin, panty liner, urine that is used to absorb menses, leukorrhea etc. and absorb disposable adsorption objects such as liner, disposable diaper.

Background technology

At present, as absorbent commodities such as panties liner, sanitary napkin, incontinence pads, use the article that between opaque liquid back sheet material such as polyethylene sheets or polyethylene sheets laminated nonwoven fabric and liquid permeability upper sheet such as nonwoven fabric or liquid permeability plastic sheet, sandwich the absorber that constitutes by cotton shape paper pulp etc. with compression recovery.

Because upper sheet forms and the skin contact-making surface, so even require softly after discharged liquid absorbs, also can to obtain dry skin sense of touch, skin is stimulated few etc.As the raw material that satisfies this requirement, the nonwoven fabric of synthetic fiber, resinousness mesh fabric sheet material are in the field of absorbent commodity, particularly be widely adopted in the sanitary napkin field.But the upper sheet that is made of synthetic fiber has to become itches and the problem of main cause such as fash.

As the article that address these problems, proposed the upper sheet of cotton fiber (cotton products) as raw material, but the upper sheet with respect to absorbent commodity has high liquid permeability, make liquid arrive the hope of absorber fast, in common in upper sheet, adding under the situation of degreasing cotton fiber, upper sheet self has high guarantor's fluidity, has the problem of the sensation that stays adhesive surface easily.

Under this background, existing upper sheet as absorbent commodity use by remaining have the natural oil that is attached to raw cotton and through the cotton fiber of bleaching and at least the scheme of the spunlace non-woven cloth that constitutes of the thermoplastic short fiber that constitutes by vinyl polymer of fiber surface (referring to Japanese documentation 1) proposed.In this technology, utilize the weak water proofing property of the natural oil that remains in cotton fiber and thermoplastic short fiber's good water proofing property, can suppress guarantor's fluidity of upper sheet.And then, also propose for make absorption liquid fast the absorbed layer below upper sheet move the scheme that a plurality of openings are set on upper sheet.

Patent documentation 1: TOHKEMY 2005-139594 communique

Yet, disclosed upper sheet must be carried out special bleaching processing to the bleaching of raw cotton fiber in the patent documentation 1, and, even carry out the special treatment natural oil of also having to reduce, and then owing to forming in the process of nonwoven fabric by the water acupuncture manipulation, utilize the washing effect of current interlacing operation and have to reduce grease, the result is that water proofing property is insufficient, can not fully prevent the adhesion that causes because of surperficial raffinate, discharged liquid that can't abundant hidden absorption.

In addition, also have following problem: the water proofing property of disclosed upper sheet is owing to the remaining quantity that relies on attached to the natural oil of raw cotton in the patent documentation 1, think the characteristic that keeps cotton fiber and when adding a high proportion of cotton fiber, water proofing property reduces, because of the adhesion due to the surperficial raffinate, the concealed reduction of discharged liquid of absorption become more remarkable.

And then also have following problem: the fine adjustment and the part water proofing property that are difficult to carry out water proofing property in patent documentation 1 disclosed upper sheet are given.

Summary of the invention

Therefore, major subjects of the present invention is: utilize skin feel good, be difficult to become itch, the various features of the cotton fiber of reason such as fash etc., can fully prevent the adhesion that causes by surperficial raffinate simultaneously, discharged liquid that can also abundant hidden absorption.

The present invention who solves above-mentioned problem is as follows.

(invention of the 1st aspect)

A kind of absorbent commodity has absorber between the back sheet material of the liquid permeability upper sheet of its face side configuration and the configuration of the inside side, it is characterized in that:

The spunlace non-woven cloth that described upper sheet constitutes for the synthetic fiber by the cotton fiber of 40～100 weight % and 60～0 weight %, be coated with waterproofing agent above it, the absorption of water of skin contact-making surface is 0mm～5mm, and partly has a plurality of openings in the perforation table at scavenge port at least.

(action effect)

Like this, for upper sheet of the present invention by adopting the spunlace non-woven cloth of cotton fiber at high proportion, bring skin feel good, be difficult to become itch, many advantages of the cotton fiber of reason such as fash etc.And, fully guarantee to reduce the absorption of water of skin contact-making surface by the coating (the outer interpolation) that utilizes waterproofing agent, become residual being fully improved of the surperficial liquid of practical problem thereby make.But just absorption of water reduces, and excremental liquid component is difficult to see through the reason that upper sheet becomes side leakage etc., thus middle and upper part of the present invention sheet material in scavenge port a plurality of openings the perforation table are set partly at least, can absorb liquid apace thus.

Its result according to the present invention, can fully prevent the phenomenon of the adhesion that caused by surperficial raffinate.In addition, water proofing property by upper sheet makes the discharged liquid of absorption be difficult to turn back to the face side at top, and upper sheet self also is difficult to keep liquid and make the transparency of upper sheet reduce the two-way interaction by adding a high proportion of cotton fiber, discharged liquid that can abundant hidden absorption.

Need to prove that the suction among the present invention is meant the absorption of water of measuring according to the regulation of JIS L 1907 Byreck methods.In addition, scavenge port partly is meant the part facing to scavenge port (the row's blood mouth on the sanitary napkin).

(invention of the 2nd aspect)

As the described absorbent commodity in the 1st aspect, it is characterized by, the described synthetic fiber that are used for upper sheet are to be that the fiber number of raw material is the staple fibre of 1.0～3.0dtex with the vinyl resin; The thickness of described upper sheet is that 0.2～2.0mm, fiber weight per unit area are 25～60g/m ², each opening area be 0.5～8.0mm ², and aperture opening ratio be 15～65%; Described waterproofing agent contains stearic acid compound; Coating amount with respect to the described waterproofing agent of fiber 100 weight portions is 0.05～0.15 weight portion; It is sanitary napkin.

Under the situation of sanitary napkin, preferably adopt this structure.Particularly the waterproofing agent coating amount too much or the area of each opening is too small or aperture opening ratio is crossed when hanging down, liquid is difficult to see through upper sheet, when the area of each opening is excessive, might be see through opening and move to the discharged liquid that absorbs the side and backflow, or upper sheet is carried out bonding Jie such as bonding agent to the parts of its inside side be attached to skin by opening by opening.Thereby the combination of above-mentioned each number range is extremely important.And so-called aperture opening ratio is meant that the gross area of opening accounts for the ratio of the upper sheet gross area.

(the described invention in the 3rd aspect)

As the described absorbent commodity in the 2nd aspect, wherein, has the middle sheet material that constitutes by hydrophilic non-woven between described upper sheet and the described absorber.

(action effect)

The middle sheet material itself that is made of such hydrophilic non-woven is known at present, but as the present invention, when being used in combination with upper opening portion sheet material with very high water proofing property, though the water proofing property height of upper sheet, but the water proofing property of utilization and hydrophilic difference have following advantage: discharged liquid becomes very well from opening to the mobile meeting of middle sheet material to the importing and the discharged liquid of opening, and infiltration rate will significantly improve.

(the described invention in the 4th aspect)

As the described absorbent commodity in the 3rd aspect, wherein, on whole of described upper sheet, be coated with described waterproofing agent.

(the described invention in the 5th aspect)

As the described absorbent commodity in the 4th aspect, wherein, the absorption of water of the absorber side of described upper sheet is than the absorption of water height of skin contact-making surface.

(action effect)

Attached to the liquid on upper sheet surface by opening during, because of the water proofing property of the face (the inside) that absorbs the side is lower than skin contact-making surface, so move very wellly to the inside side shifting.

In addition, at this moment, owing to excessively do not suppress diffusion, so good in the diffusivity on the absorption side of upper sheet along upper sheet the inside yet.In addition, the discharged liquid that moves to the absorption side of upper sheet is drained by the difference of water proofing property and is moved to a direction, is difficult to turn back to the skin contact surface side, prevents the effect of backflowing so will further improve.

In addition, the difference of the absorber side of upper sheet and the absorption of water of skin contact-making surface is utilizing JIS L 1907 Byreck methods to carry out in the mensuration of absorption of water, can be by confirming with the sheet material two sides after the visual relatively suction.

(the described invention in the 6th aspect)

As the described absorbent commodity in the 3rd aspect, wherein, on described upper sheet, have anti-water section that is coated with described waterproofing agent and the hydrophilic segment that does not apply waterproofing agent, described anti-water section is provided with in the mode that contains the scavenge port part, and described hydrophilic segment is provided with in the mode that contains described scavenge port width two side portions partly.

(action effect)

Because scavenge port partly is a part of directly accepting discharged liquid, so improving, the coating waterproofing agent prevents backflowing property, on the other hand, the part of the width both sides of scavenge port part, especially can fash take place easily because of the kinetic friction of leg etc. and itch, directly do not bring into play hygroscopicity, the absorption of perspiration that cotton fiber had originally so do not apply waterproofing agent, thus, can significantly improve the comprehensive usability of wearing.

Utilize the present invention can bring following advantage: utilize skin feel good, be difficult to become and itch and many features of the cotton fiber of the reason of fash etc. etc., also can fully prevent the adhesion that surperficial raffinate causes, and the abundant discharged liquid of hideaway absorption.

Description of drawings

Fig. 1 is the expanded view of sanitary napkin.

Fig. 2 is its cross-sectional view (II of Fig. 1-II alignment view).

Fig. 3 is its cross-sectional view (III of Fig. 1-III alignment view).

Fig. 4 is the expanded view of example of the waterproofing agent application pattern on expression upper sheet surface.(A) for have the pattern of hydrophilic segment in the width both sides; (B) for have the pattern of hydrophilic segment in fore-and-aft direction two ends and width both sides.

Fig. 5 is the concealed photo of discharged liquid that the absorbent commodity of embodiment and comparative example 1～3 is shown.

Symbol description

1... sheet material, 7... side nonwoven fabric, 8... embossing recess, the independence embossing of 9... rear end, 40... waterproofing agent coating portion, BS... standing gather, W... wing wing flap, WB... buttocks flank shape wing flap in the middle of sanitary napkin, 2... opaque liquid back sheet material, 3... upper sheet, 4... lower floor absorber, 5... upper strata absorber, the 6....

The specific embodiment

Below, in conjunction with the accompanying drawings embodiments of the present invention are described in detail.

(example of the basic structure of sanitary napkin)

Fig. 1 is an expanded view of representing an example of sanitary napkin as absorbent commodity of the present invention.Fig. 2 is II-II alignment view of Fig. 1, and Fig. 3 is III-III alignment view of Fig. 1.The main composition of illustrative sanitary napkin 1 comprises among the figure: the opaque liquid back sheet material 2 that is made of polyethylene sheets etc.; The upper sheet 3 that becomes skin contact-making surface 3F and menses, leukorrhea etc. are seen through fast; Be situated between and be located at the

absorber

4,5 that constitutes by cotton official form for filing a lawsuit slurry or synthetic paper-pulp etc. between this two

sheet material

2,3; With the summary side edge part of absorber 4 as the cardinal extremity that stands up, and in the mode that contains the body fluid discharge portion at least along fore-and-aft direction pairing left and right standing gather BS, BS to the outstanding setting of face side in regulation interval.And around absorber 4, lower end edge portion engages the outer edge of opaque liquid back sheet material 2 and upper sheet 3 by adhering devices such as bonding agent such as hot melt or heated sealants thereon, and will more prolong the opaque liquid back sheet material 2 that and the side nonwoven fabric that forms standing gather BS 7 engages than absorber 4 by adhering devices such as bonding agent such as hot melt or heated sealants to the side in its both side edges portion, partly form the wing flap W of outstanding sideways wing by the laminated sheet that forms by these opaque liquid back sheet materials 2 and side nonwoven fabric 7, W, and, more forming the wing flap WB of the 2nd wing by the part of buttocks side than it, WB.In illustrated example, the two-layer structure of high portion during the part that absorber 4,5 becomes absorber 4 forms, but also can be one deck structure, can also be the two-layer structure that the absorber of same size, shape is overlapping.

Opaque liquid back sheet material 2 use polyethylene etc. have the sheet material that hides water-based at least, but in recent years from preventing damp and hot viewpoint consideration, the tendency of using the material with poisture-penetrability are arranged.As this screening water, poisture-penetrability sheet material, be fit to use after the melting mixing inorganic filler forms sheet material in vinyl resins such as polyethylene or polypropylene, by extending the little porous sheet material that obtains to one or two direction of principal axis.Non-use face side (outside) at opaque liquid back sheet material 2 forms 1 or many bond layers (not shown), when being dressed in health sanitary napkin 1 is fixed in underwear.As opaque liquid back sheet material 2, can use plastic film and the stacked formed multi-layer nonwoven fabrics of nonwoven fabric.

As absorber 4,5, so long as can absorb, keep getting final product of body fluid, consider from the viewpoint of absorption function and price, be fit to use the material of in wing flap official form for filing a lawsuit slurry, sneaking into the water absorbent polymer powder usually.Absorber 4,5 preferably centers on

package sheet material

4L, 5L such as waddings for shape and polymer powder maintenance etc.In legend, be provided with upper strata absorber 5 along the width central portion of the upside of lower floor's absorber 4, but omitted upper strata absorber 5 and package sheet material 5L thereof, can adopt the known absorbent structure of only making single absorber 4 grades.

In illustrated example, upper sheet 3 is arranged to the degree wideer a little than the width of absorber 4, accomplish only to cover absorber 4, the width outside of upper sheet 3 is covered by the side nonwoven fabric 7 (being different from the parts of upper sheet) that extends from surface, upper sheet 3 both sides.The part of the width center side of side nonwoven fabric 7 forms standing gather BS.As side nonwoven fabric 7,, can use the nonwoven cloth material of having implemented suitable WATER REPELLENT TREATMENT or hydrophilic treatment according to preventing that menses or leukorrhea etc. from soaking into or improve purposes such as skin tactility.As this side nonwoven fabric 7, can use the material that natural fabric, synthetic fiber or regenerated fiber etc. are formed by suitable processing method as raw material, but for removing the sense and for preventing the damp and hot preferred nonwoven fabric that uses control level ground amount and keep aeration of hardening.Particularly, to become the level ground amount be 15～23g/m in preferred use ²Nonwoven fabric, and for preventing that reliably body fluid from seeing through the preferred WATER REPELLENT TREATMENT nonwoven fabric that has been coated with waterproofing agents such as silicon class, paraffin class etc. that uses.

Side nonwoven fabric 7 as shown in Figures 2 and 3, surmount the absorber lateral margin a little from the inner side of absorber 4, at gamut to opaque liquid back sheet material 2 outer rims, the part that will be positioned at the width pars intermedia outside with bonding agents such as hot melts is bonding, laminated sheet part by these side nonwoven fabric 7 and opaque liquid back sheet material 2, form wing wing flap W, the W of pairing left and right in the absorber side locations that roughly is equivalent to the body fluid discharge portion, and form the 2nd wing wing flap WB, WB at the buttocks side position thus.The outside at these wing wing flaps W, W and the 2nd wing wing flap WB, WB possesses adhesive phase 12..., 13... respectively.When being used for pants, wing wing flap W, W go back to offside along the line RL position of turning back, and coiling is fixed on the crotch of pants.

On the other hand, the inside part of side nonwoven fabric 7 roughly turns back into two layers, and, in this two sheets inside, the thread elastic telescopic parts 19 that two ends or length direction appropriate location are fixed are provided in the short transverse pars intermedia, and,, be equipped with the thread elastic

telescopic parts

20,20 of the state that many (in the illustrated example being 2) two ends or length direction appropriate location be fixed at the upside position of thread elastic telescopic parts 19.As shown in Figure 3, be folded into cross section Z shape in the end, front and back and under the stacked state this two synusia materials partly be bonded in absorber 4 sides, setting the position with thread elastic telescopic parts 19 thus is bending point, form cross section " ㄑ " word shape and towards the pocket of interior side opening, simultaneously, be formed on standing gather BS, the BS that face side erects.

On the other hand, in this sanitary napkin 1, in detail as shown in Figure 4, in the use face side of lower floor's absorber 4, elongated on the width central portion sanitary napkin length direction and utilize the zone of embossing recess 8 zonings of the ring-type be enclosed in Zhou Fangxiang be formed with respect to around using the higher lifting of face side upper strata absorber 5 in high portion.Embossing recess 8 forms in the mode that the surface from upper sheet 3 is trapped in the absorber 4.In the rigidity of the thickness of high portion lower floor's absorber 4 when blocked up increase, the adaptation of health is reduced, so be preferably 3～20mm, more preferably 5～15mm.In addition, at the rear side of embossing recess 8, vacate certain intervals and form the rear end independence embossing 9 that slightly is contrary umbrella shape shape with respect to embossing recess 8.

(upper sheet)

The skin contact-making surface 3F that upper sheet 3 forms as the part of the face side that covers absorber 4,5 is characterized in that constituting with the spunlace non-woven cloth that contains cotton fiber.Spunlace non-woven cloth does not use bonding agent, has advantages such as flexibility.

Upper sheet 3 nonwoven fabric can use cotton fiber separately, still preferably mix use with synthetic fiber owing to easily fluffing takes place.Mix the nonwoven fabric that forms owing to have the thermal welding easy-formation with synthetic fiber, become the good stiffness sheet material of liquid permeability, be difficult to because of the advantages such as liquid leakage of wrinkling and distortion causes so have.Form the mixed proportion of the fiber of nonwoven fabric, cotton fiber is counted 40～100 weight % with weight %, and synthetic fiber are 60～0 weight %, more preferably cotton fiber are set at 40～60 weight %, and synthetic fiber are set at 60～40 weight %.Preferably use the nonwoven fabric that the about 50 weight % of the about 50 weight % of cotton fiber, synthetic fiber is mixed and form as optimal condition.The thickness setting of upper sheet 3 is 0.2～2.0mm, is preferably 0.5～1.2mm that the fiber weight per unit area is set at 25～60g/m ², be preferably 30～40g/m ²As the not enough 25g/m of fiber weight per unit area ²The time, become the quality inequality of sheet material or the reason that intensity reduces, in addition the disguised variation of discharged liquid surpasses 60g/m ²The time have a problem of easy maintenance discharged liquid.

As cotton fiber, implement the cotton fiber of dyeing, the degreasing cotton fiber behind the refining bleaching after can using raw cotton, the cotton fiber behind the refining bleaching or the refining bleaching of cotton, can also be the article that become yarn or cloth to be separated fine back and the various cotton fibers such as regenerate hair that obtain, but especially preferably utilize the oil content of cotton fiber under the state of fiber, to possess the not absorbent cotton of some water proofing properties.

As the synthetic fiber that constitute upper sheet 3, can use alkene classes such as polyethylene or polypropylene, polyesters, polyamide-based etc. or its composite fibre, copolymer, mixture.The fibre length of the fiber that uses can be used any in long fiber, staple fibre or their mixture.Preferred 1.0～the 3.0dtex of fiber number.

For improving the liquid permeability of upper sheet 3, a plurality of openings in the perforation table are set.Particularly, can the current interlacing operation when the manufacturing of spunlace non-woven cloth in, the fibrous material load be held on the mesh-shape support and form opening.Under this situation,, can adjust size, the aperture opening ratio of each opening by changing the condition of employed mesh.Certainly, can carry out perforating processing to the nonwoven fabric after making and form opening.Opening can be provided with on whole upper sheet, also can only be provided with at the position corresponding with scavenge port (the row's blood mouth during sanitary napkin), also can wholely be provided with.Each opening is set at 0.5～8.0mm ², be preferably set to about 5mm ², aperture opening ratio is set at 15～65%.If the not enough 0.5mm of opening ², then menses are difficult to divide a word with a hyphen at the end of a line to

absorber

4,5, become the reason of upper sheet surface raffinate; When surpassing 8.0mm ²The time, the liquid that flows out from opening backflows, and becomes

absorber

4,5 and constitutes the reason that expose on raw-material surface.

Add the coating waterproofing agent outside on upper sheet 3.Can suitably select to use in the known waterproofing agent such as paraffin class, silicon class the bland material of skin as waterproofing agent, but the preferred bland greases such as stearic amide, zinc stearate, calcium stearate, Stearic acid diethanolamine salt, dolomol of suitably selecting use.Use in sanitary napkin under the situation of the waterproofing agent that contains stearic acid compound, its coating amount is preferably set to 0.05～0.15 weight portion (during the coating of two sides is the coating total amount on two sides) with respect to fiber 100 weight portions.More preferably coating amount is about 0.08～0.12 weight portion.Waterproof effect is not good during waterproofing agent coating amount less than 0.05 weight portion, and water proofing property is too high when surpassing 0.15 weight portion, is difficult to see through moisture on the contrary.

Waterproofing agent can only be coated to the skin contact-making surface, also can be coated to the two sides of skin contact-making surface and

absorber

4,5 sides, but the absorption of water of skin contact-making surface (JIS L 1907 Byreck methods) is 0mm～5mm at least, is preferably 0mm～2mm.

Particularly in the absorption of water of

absorber

4,5 sides of upper sheet 3 preferably than the absorption of water height of skin contact-making surface.Therefore, the absorption of water of

absorber

4,5 sides (JIS L 1907) is preferably 0mm～10mm, about preferred especially 2mm～4mm.The difference of such absorption of water can apply waterproofing agent and acquisition easily by a skin contact-making surface in upper sheet 3, but also can be at the two sides of upper sheet 3 coating waterproofing agent, and under this situation,

absorber

4,5 sides apply the amount of lacking than the skin contact-making surface.In addition, even only waterproofing agent is coated under the situation of skin contact-making surface of upper sheet 3, by thickness, weight per unit area,

absorber

4,5 sides also become the face with water proofing property.Be that the applicator surface of waterproofing agent is arranged to single face or two-sided, what the two sides coating amount determines such as when being arranged to the two sides, conditions such as these thickness in conjunction with upper sheet 3, weight per unit area, opening are suitably selected can balancedly keep liquid permeability and hygroscopic mode.

The coating method of waterproofing agent can suitably use transfer printing, spraying, brush coating, impregnation, method that impregnating is known.Preferably use coating method when making the absorption of water on sheet material two sides keep difference by transfer printing.

Consider the preferred waterproofing agent of coating comprehensively from the viewpoint of making efficient, but the part coating that also can only accept to drain.For example shown in Fig. 4 (A), coating agent coating part 40 can be set except that the width both sides.In addition, shown in Fig. 4 (B), also only the part in the middle of width central authorities and fore-and-aft direction is provided with waterproofing agent coating part 40.

(middle sheet material)

The upper sheet 3 of absorbent commodity of the present invention has a plurality of openings.For the paper pulp that prevents to constitute

absorber

4,5, polymer, bonding agent etc. expose from opening, preferred sheet material 6 in the middle of the configuration between upper sheet 3 and absorber 4,5.Middle sheet material 6 has and prevents to backflow from

absorber

4,5, makes by buffering effect that skin contacts the effect that limbers up when wear.

The middle sheet material 6 of illustrated example is folded into tubular becomes 2 layers of structure, but also can not fold and become single layer structure.Middle sheet material 6 can spread all over the setting of whole skin contact-making surface, also can only be provided with in width central authorities and fore-and-aft direction pars intermedia (particularly portion between the thigh).

The raw material of middle sheet material 6 are so long as have the liquid permeability and get final product, but the especially preferred material of possess hydrophilic property.By with sheet material 6 in the middle of this hydrophily and water proofing property upper opening portion sheet material 3 combinations of the present invention, can significantly improve the liquid permeability of upper sheet 3 and prevent backflowing property.As this hydrophily raw material, use natural fabrics such as regenerated fiber, cotton such as artificial silk, artificial fibre, make the possess hydrophilic property of raw material own thus, maybe can use and utilize hydrophilic agent to carry out surface treatment, give hydrophilic fiber alkene classes such as polyethylene or polypropylene, polyesters, polyamide-based etc. or its composite fibre, copolymer, the such synthetic fiber of mixture.The fiber that constitutes nonwoven fabric can use any of long fiber, staple fibre or their mixture.Preferred 3.0～the 7.0dtex of fiber number.Middle sheet material 6 can use any of nonwoven fabric of hot blast, air lay, known mode such as spunbond, the hot-wind nonwoven cloth that preferred use does not make aeration reduce.In addition, more preferably use the durable hydrophilic nonwoven fabric.Preferred 20～the 30g/m of weight per unit area of middle sheet material 6 ²Sheet material 6 joins itself and the inside of upper sheet 3 in the middle of the configuration, preferably passes through hot melt or thermal welding (embossing) and engages with the inside of upper sheet 3.

Embodiment

Make with Fig. 1～Fig. 3 and have same structure, just the formation fiber of upper sheet with have or not the different absorbent commodity of condition that applies waterproofing agent, as embodiment and comparative example 1,2.Simultaneously, will have product as a comparative example 3 now.Creating conditions of the absorbent commodity of embodiment, comparative example 1～3 is as shown in table 1.Cotton fiber in the table uses bleaching cotton, and synthetic fiber use polyethylene/polypropylene composite fibre (fiber number 5.6dtex).Use with the finish of stearic acid compound as waterproofing agent as main component.

Table 1

Embodiment, comparative example 1～3 all use the material of the middle sheet material of configuration.Middle sheet material uses the hot-wind nonwoven cloth of polyethylene/polypropylene composite fibre (fiber number 5.6dtex).

Near the central authorities of the front and back of these absorbent commodities, width, inject artificial menses 3cc for 3 times, carry out the research of infiltration rate, menses disguise, liquid regurgitation volume with 3 minutes interval.

(infiltration rate)

Liquid is divided a word with a hyphen at the end of a line to from the upper sheet surface and is absorbed the needed time of side when measuring the 3rd artificial menses and injecting.

(regurgitation volume)

Load onto the filter paper of having measured weight in advance after dripping 1 minute for the 3rd time,, load 5g/cm through behind the certain hour ²The hammer of loading continues 5 minutes, measures filter paper weight after the load-carrying once more, and the weight difference before and after load-carrying calculates regurgitation volume (g).

The infiltration rate of the absorbent commodity of embodiment, comparative example 1～3, regurgitation volume result as shown in table 1.In addition, Fig. 5 represents to show the concealed photo of these absorbent commodities.The fiber that forms the nonwoven fabric of upper sheet is cotton 100% o'clock, and distinguish: infiltration rate is slow under the state that does not apply waterproofing agent, regurgitation volume is many for absorbent commodity, wearing feeling poor (comparative example 2).By sneak into cotton fiber and synthetic fiber in the nonwoven fabric of upper sheet, infiltration rate improves, but regurgitation volume is still a lot, and does not see good disguise (comparative example 1).By in the nonwoven fabric of sneaking into cotton fiber and synthetic fiber, applying waterproofing agent, infiltration rate is fast, regurgitation volume is many situation and existing product (comparative example 3) identical (embodiment).And disguise can obtain than the existing good result of product.Need to prove that compare with existing product, the absorbent commodity of embodiment has the skin sense of touch and the style of the softness of cotton uniqueness.

As known from the above, the characteristic that absorbent commodity of the present invention has the infiltration rate identical with existing product and prevents to backflow has and existing product equal above discharged liquid disguise and wearing feeling.

The possibility of utilizing on the industry

The present invention can be used in all disposable adsorption objects such as the sanitary napkin that absorbs menses, leukorrhea etc., panty liner, urine absorbent pad, disposable diaper.

Claims

1. an absorbent commodity has absorber between the back sheet material of the liquid permeability upper sheet of its face side configuration and the configuration of the inside side, it is characterized in that:

2. absorbent commodity as claimed in claim 1, wherein, the synthetic fiber that use in the described upper sheet are to be the staple fibre of 1.0～3.0dtex with vinyl resin as the fiber number of raw material,

The thickness of described upper sheet is that 0.2～2.0mm, fiber weight per unit area are 25～60g/m ², each opening area be 0.5～8.0mm ², and aperture opening ratio be 15～65%,

Described waterproofing agent contains stearic acid compound,

With respect to fiber 100 weight portions, the coating amount of described waterproofing agent is 0.05～0.15 weight portion, is sanitary napkin.

3. absorbent commodity as claimed in claim 2 wherein, has the middle sheet material that is made of hydrophilic non-woven between described upper sheet and the described absorber.

4. absorbent commodity as claimed in claim 3 wherein, is coated with described waterproofing agent on whole of described upper sheet.

5. absorbent commodity as claimed in claim 4, wherein, the absorption of water of the absorber side of described upper sheet is than the absorption of water height of skin contact-making surface.

6. absorbent commodity as claimed in claim 3, wherein, on described upper sheet, have anti-water section that is coated with described waterproofing agent and the hydrophilic segment that does not apply waterproofing agent, described anti-water section is provided with in the mode that contains the scavenge port part, and described hydrophilic segment is provided with in the mode that contains described scavenge port width two side portions partly.