CN101453971B - Absorptive article and method of producing absorbent element - Google Patents

Absorptive article and method of producing absorbent element Download PDF

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Publication number
CN101453971B
CN101453971B CN200780019899XA CN200780019899A CN101453971B CN 101453971 B CN101453971 B CN 101453971B CN 200780019899X A CN200780019899X A CN 200780019899XA CN 200780019899 A CN200780019899 A CN 200780019899A CN 101453971 B CN101453971 B CN 101453971B
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Prior art keywords
absorber
granule
upper strata
lower floor
superabsorbent polymer
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CN200780019899XA
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CN101453971A (en
Inventor
越智美幸
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Daio Paper Corp
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Daio Paper Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
    • A61F2013/8408—Additives, e.g. for odour, disinfectant or pH control with odour control
    • A61F2013/8414—Additives, e.g. for odour, disinfectant or pH control with odour control with anti-microbic

Abstract

To achieve a sufficient antibacterial performance without damaging absorptivity by using filament masses as an absorbent element. [MEANS FOR SOLVING PROBLEMS] A paper diaper having an upper layer absorbent (56A) located in the top sheet (30) side and a lower layer absorbent adjacent to the bottom of the upper layer absorbent as an absorbent element which receives a liquid having permeated through the top sheet (30) in the face to be used, wherein the absorbent element (50) comprises the upper layer absorbent (56A), which has a filament mass made up of a number of filaments (52) continuing along the anteroposterior direction of the article, and a lower layer absorbent element (56B), which has a short fiber mass made up of a number of short fibers (55) gathering at random and antibacterial particles (51) dispersed therein, located adjacent to the upper layer absorbent.

Description

The manufacture method of absorbent commodity and absorptive unit
Technical field
The present invention relates to have the manufacture method of absorbent commodity and the absorptive unit (absorption key element) of antibacterial functions.
Background technology
The basic comprising part of the absorbent commodities such as child and adult's belt or the disposable urine napkin of Briefs type, sanitary towel is as follows: use prevent the back sheet that liquid sees through and the acceptance between these sheets and maintenance of surface patch, the rear side of face side to see through the absorptive unit of the discharged liquid of surface patch.
On the basis of this basic comprising part, additional following form aptly: the outer load of the rear side setting example of sheet as being made of non-woven fabrics etc. overleaf, improve the form of the sense of touch when using plastic sheet as back sheet; Form the form of so-called edge (バ リ ヤ-カ Off ス) etc. in the both sides of goods; For improve around the waist and abdominal part on every side fit and the form etc. of giving elastic extension.
As the absorptive unit of accepting and kept seeing through the liquid of the surface patch that uses the face side, usually used the fiber accumulations body of paper pulp short fiber in the past.And, be also known as the absorbtivity that improves liquid and used superabsorbent polymer granule (hereinafter being also referred to as " SAP ").
SAP is except being dispersed in the fiber accumulations body (Plot Woven body of paper pulp short fiber) on situation, the SAP of paper pulp short fiber disperse to be kept, make fiber accumulations body (patent documentation 1).
With respect to this existing absorber, patent documentation 2) and Japanese Unexamined Patent Application Publication 2004-500165 number (United States Patent (USP) the 6th such as Japanese Unexamined Patent Application Publication 2002-524399 number (WO99/27879:, 646, No. 180: patent documentation 3), have in recent years document to propose to use the tow (ト ウ (tow)) of cellulose ethanoate as absorptive unit.Tow is the filament aggregation of the in a predetermined direction a large amount of filaments of continued presence, and its fiber accumulations body from the paper pulp short fiber is different, mainly along the continuous direction diffusion of fiber discharged liquid, therefore has advantages of and can utilize this diffusible height to design.
In addition, compare with the paper pulp short fiber, bunch fiber is thicker usually, add that it is continuous fiber, thereby the elasticity of fiber is brought into play powerful effect in absorber one by one.Therefore, even a small amount of tow also can obtain the required intensity of absorber and toughness, so can form than the thinner lighter gentleer absorber of absorber that uses the paper pulp short fiber.In recent years, prolong the period that the child breaks away from diaper, consider the child's who sprouts self consciousness period sense of personal worth, thereby need to use the absorber of slim design, large-sized child to use the paper napkin, and the characteristic of the absorber of tow of having used as described above just meets such requirement.And, with those slight incontinence symptom has appearred but still the paper napkin that the light incontinence of the old artificial object that can live is fully independently used also need above-mentioned characteristic.
And, have in recent years document to propose to give the technology of the paper napkin and sanitary towel's deodorization and antibiotic property.For example, in Japanese kokai publication hei 8-176338 communique (patent documentation 4) absorbent commodity that is dispersed with zeolite in the granule interior of absorbent resin is disclosed.And, a kind of pulverous deodorization/antibiotic property water absorbing agent is disclosed in Japanese kokai publication hei 12-79159 communique (patent documentation 5), this pulverous deodorization/antibiotic property water absorbing agent be by water-absorbing resins, to ammonia-producing bacterium have antibacterial action chemical compound, ammonia is had neutralising capacity or the medicine that ammonia has neutralising capacity and an absorbability is consisted of.The function that is difficult to be discovered after this incontinence is that the adult that large-sized child uses with the paper napkin and light incontinence uses the paper napkin necessary, has also received concern.
Patent documentation 1: TOHKEMY 2004-65300 communique
Patent documentation 2: Japanese Unexamined Patent Application Publication 2002-524399 communique
Patent documentation 3: Japanese Unexamined Patent Application Publication 2004-500165 communique
Patent documentation 4: Japanese kokai publication hei 8-176338 communique
Patent documentation 5: Japanese kokai publication hei 12-79159 communique
Summary of the invention
But, because compare the fiber of tow with the paper pulp short fiber not only thick but also long, therefore in the situation of the fiber that uses identical weight, the absorber take tow as absorptive unit is compared with the absorber take the paper pulp short fiber as absorptive unit, and the total surface area of its whole fibers is less.That is, can stably keep the amount of the graininess constructs such as superabsorbent polymer less in the interfibrous space.Therefore, in the absorber take tow as absorptive unit, when the combined amount of graininess construct surpassed saturation, superfluous graininess construct can not remain on predetermined position, thereby can't give full play to its performance.
The adult who uses with the paper napkin and light incontinence for above-mentioned large-sized child uses the paper napkin, require absorbtivity to surpass existing child and use the paper napkin, thereby measure and mix high absorption polymer with higher unit are consumption (in Japanese with " order is paid " representation unit area weight).In addition, if also contain antibacterial granule, then the graininess construct in the filament aggregation surpasses saturation, needs to solve the problem of retentivity.
And, in above-mentioned filament aggregation, contain in the situation of antibacterial granule, because the filament aggregation mainly spreads discharged liquid along the continuous direction of fiber, so antibacterial granule is difficult to contact with discharged liquid, there is the problem that is difficult to manifest antibacterial action.
So, bring into play fully high absorbing power and sufficient anti-microbial property when major subjects of the present invention is to use the filament aggregation as absorptive unit.
The present invention who solves above-mentioned problem is as follows.
The invention of＜technical scheme 1 record 〉
A kind of absorbent commodity, this absorbent commodity has: surface patch (top sheet), it is arranged at use face side; Liquid impermeability sheet, it is arranged at rear side; And absorptive unit, it is arranged between above-mentioned surface patch and the liquid impermeability sheet, accepts and keep having seen through the liquid of surface patch, and described absorbent commodity is characterised in that,
Described absorptive unit has the upper strata absorber that is positioned at described surface patch side and the lower floor absorber adjacent with the downside of this upper strata absorber,
Described upper strata absorber is to make the superabsorbent polymer granule be dispersed in a large amount of filaments to form in the filament aggregation of article fore-and-aft direction continued presence,
Described lower floor absorber is dispersed in the fiber aggregate antibacterial granule and forms.
(action effect)
Among the present invention, in the fiber aggregate of the lower floor absorber adjacent with downside, be dispersed with antibacterial granule in addition.Thus, the discharged liquid that is absorbed in the absorptive unit spreads at the article fore-and-aft direction along filament in the absorber of upper strata, simultaneously, move to lower rear flank, be transferred in lower floor's absorber, lower floor's absorber in a big way in keep a large amount of discharged liquid, thereby discharged liquid is contacted with more antibacterial granule.Therefore, compare with only disperse the situation of antibacterial granule in the filament aggregation, anti-microbial property is excellent.And antibacterial granule has in the situation of deodorization functions, can bring into play sufficient deodorizing effect.
The invention of＜technical scheme 2 records 〉
Such as technical scheme 1 described absorbent commodity, wherein,
The unit are consumption of the described fiber aggregate in the unit are consumption of the described filament aggregation in the absorber of described upper strata and the described lower floor absorber add up to 150g/m 2Below,
The unit are consumption of the described antibacterial granule in the unit are consumption of the described superabsorbent polymer granule in the absorber of described upper strata and the described lower floor absorber add up to 250g/m 2It is above,
Described superabsorbent polymer Particle Phase in the absorber of described upper strata for the weight ratio of described filament aggregation less than the described antibacterial granule of the described lower floor absorber weight ratio with respect to described fiber aggregate.
(action effect)
So, even increase on the whole grain amount, by making the Particle Phase in the absorber of upper strata be lower than Particle Phase in lower floor's absorber for the weight ratio of fiber aggregate for the weight ratio of filament aggregation, thereby the fibre gap of upper strata absorber is increased, make discharged liquid be easy to be shifted to lower floor's absorber by the upper strata absorber, thereby also not only absorbability is excellent, and can be to more discharged liquid performance antibacterial effect.
The invention of＜technical scheme 3 records 〉
Such as technical scheme 1 or 2 described absorbent commodities, wherein, the density of the filament of described upper strata absorber is lower than the density of the fiber of described lower floor absorber.
(action effect)
The density of the filament by making the upper strata absorber is relatively low, thereby makes discharged liquid be easy to be shifted to lower floor's absorber by the upper strata absorber, thereby can be to more discharged liquid performance antibacterial effect.
The invention of＜technical scheme 4 records 〉
Such as technical scheme 1～3 each described absorbent commodity, wherein, the fiber aggregate of described lower floor absorber is that a large amount of short fibers is assembled the short fiber aggregation that forms.
(action effect)
The short fiber aggregation is being inferior to the filament aggregation aspect the diffusivity of discharged liquid, but its dispersal direction and diffusion homogeneous, the hold facility of discharged liquid and the hold facility of antibacterial granule are also high.Therefore, when using such short fiber aggregation as lower floor of the present invention absorber, can be when keeping antibacterial granule with high density, the discharged liquid that is absorbed in lower floor's absorber is spread in all directions and on a large scale, and it is contacted with more antibacterial granule, thereby this is preferred.
The invention of＜technical scheme 5 records 〉
Such as technical scheme 4 described absorbent commodities, wherein, described lower floor absorber is the air-laid nonwoven fabrics that forms take the mixture of described fiber and described antibacterial granule as prepared using air lay method.
(action effect)
By electing lower floor's absorber as this air-laid nonwoven fabrics, can further improve the hold facility of antibacterial granule, and then can keep antibacterial granule with high density.
The invention of＜technical scheme 6 records 〉
Such as technical scheme 3～5 each described absorbent commodities, wherein, the particle diameter of the superabsorbent polymer granule that described upper strata absorber is contained is more than the 200 μ m, and the particle diameter of the antibacterial granule that described lower floor absorber is contained is less than 200 μ m.
(action effect)
Particle diameter by making the contained antibacterial granule of lower floor's absorber, also can form thinly lower floor's absorber, thereby can access thinner on the whole absorptive unit even mix granule with high density less than 200 μ m.
And, in the described article of the technical program, during manufacturing, after upper strata absorber and lower floor's absorber is overlapping, only mix thereon or scatter respectively superabsorbent polymer granule and antibacterial granule, just can make the superabsorbent polymer granule mainly remain on the upside (upside, inside and the downside that comprise upper strata absorber 56A) of lower floor's absorber, make simultaneously antibacterial granule remain on (upside, inside and the downside that comprise the absorber 56A of lower floor) below lower floor's absorber by the upper strata absorber, thereby particularly preferably.
The invention of＜technical scheme 7 records 〉
Such as technical scheme 1～6 each described absorbent commodity, wherein, the antibacterial granule of described lower floor absorber is antibacterial and deodouring superabsorbent polymer granule.
(action effect)
Because the antibacterial granule of lower floor's absorber has absorbability, so can reduce the consumption of superabsorbent polymer granule in the absorber of upper strata.
The invention of＜technical scheme 8 records 〉
Such as technical scheme 1～7 each described absorbent commodity, wherein, the superabsorbent polymer granule of described upper strata absorber is antibacterial and deodouring superabsorbent polymer granule.
(action effect)
Because the superabsorbent polymer granule in the absorber of upper strata has antibacterial and deodouring, so can reduce the consumption of antibacterial granule in lower floor's absorber.
The invention of＜technical scheme 9 records 〉
Such as technical scheme 7 or 8 described absorbent commodities, wherein, described antibacterial and deodouring superabsorbent polymer granule be following zeolite granular is included in form in the superabsorbent polymer granule or utilize static that described zeolite granular is attached on the surface of superabsorbent polymer granule to form, described zeolite granular be with silver ion replace in the zeolite can ion exchange the zeolite granular that forms of part or all of ion.
(action effect)
Use this with silver ion replace in the zeolite can ion exchange part or all of ion form zeolite granular the time, not only can be by discharged liquid and silver contact to bring into play antibiosis and deodorization effects, and the catalytic action of the adsorption by zeolite and silver makes the granule that does not contact with discharged liquid also give play to deodorizing effect, so be preferred.And; zeolite granular is included in the superabsorbent polymer granule; integraty is also higher; it is one of preferred form; but when utilizing static to make zeolite granular be attached on the surface of superabsorbent polymer granule; not only easily make, and all zeolite granular can be exposed to the outside, thereby give full play of effect.
The invention of＜technical scheme 10 records 〉
Such as technical scheme 1～9 each described absorbent commodity, wherein, described upper strata absorber has such zone at the fore-and-aft direction central part of article, is lower than the front and back of article or does not have described superabsorbent polymer granule at the content of superabsorbent polymer granule described in this zone.
(action effect)
In the described structure of the technical program, discharged liquid spreads in the absorber of upper strata well, and infiltration rate improves, so preferred.
The invention of＜technical scheme 11 records 〉
Such as technical scheme 1～10 each described absorbent commodity, wherein, the content that described lower floor absorber has a described antibacterial granule at the fore-and-aft direction central part of article is higher than the zone of the front and back of article.
(action effect)
Because the fore-and-aft direction central part of article is parts that discharged liquid is concentrated especially, therefore the amount of the antibacterial granule by making this part can be brought into play antibacterial action effectively more than other position.
Particularly, also have in the absorbefacient situation at the contained antibacterial granule of lower floor's absorber, by adopting this structure, can improve the absorbance of the central part that discharged liquid concentrates.And, in this case, even few or do not exist in the situation of superabsorbent polymer granule at the content of the superabsorbent polymer granule of the fore-and-aft direction central part of above-mentioned such upper strata absorber, also can not reduce the absorbtivity of central part as absorber integral body.
The invention of＜technical scheme 12 records 〉
A kind of manufacture method of absorptive unit, it is characterized in that, after overlapping on the fiber aggregate along the filament aggregation of article fore-and-aft direction continued presence a large amount of filaments, mixing thereon or scattering respectively particle diameter is that the above superabsorbent polymer granule of 200 μ m and particle diameter are less than the antibacterial granule of 200 μ m.
(action effect)
By such manufacture method, can easily make absorptive unit of the present invention.
As mentioned above, according to the present invention, can when using the continuous fiber aggregation as absorptive unit, bring into play high absorbing power and sufficient anti-microbial property.
Description of drawings
Fig. 1 is the axonometric chart of Briefs type disposable urine napkin.
Fig. 2 is the deployed condition plane graph of Briefs type disposable urine napkin.
Fig. 3 is the 3-3 line sectional view of Fig. 2.
Fig. 4 is the sectional view of other examples.
Fig. 5 is the deployed condition plane graph of belt disposable urine napkin.
Fig. 6 is the 9-9 line sectional view of Fig. 5.
Fig. 7 is the overview diagram of absorptive unit.
Symbol description
10 ... the Briefs type disposable urine napkin, 10A ... the belt disposable urine napkin, 12 ... outer load, 12A ... back sheet, 20 ... absorbent main body, 30 ... surface patch, 40 ... intermediate, 50 ... absorptive unit, 51 ... antibacterial granule, 52 ... filament, 52X ... bundle (ベ-Le), 52Y ... tow, 52Z ... the aggregation of filament, 54 ... the superabsorbent polymer granule, 55 ... short fiber, 56 ... absorber, 56A ... the upper strata absorber, 56B ... lower floor's absorber, 58 ... covering piece, 60,60A ... edge, 64 ... barrier flaps (バ リ ア-シ-ト), 70 ... liquid impermeability sheet, 72 ... the 2nd liquid impermeability sheet, 80 ... retention tab, E ... heat fused (Hot is melting) part.
The specific embodiment
Below, with reference to accompanying drawing an embodiment of the invention are elaborated.
The example of＜Briefs type disposable urine napkin 〉
Fig. 1 has provided the example of Briefs type disposable urine napkin.This Briefs type disposable urine napkin 10 has the outer load 12 of outside (back side) side and the absorbent main body 20 of inner face (surface) side, is fixed wtih absorbent main body 20 on the load 12 outside.Absorbent main body 20 is the parts that stop and absorb liquid such as keeping urine or soft stool (being menses in the sanitary towel described later).Outer load 12 is the parts that are intended to be worn on the wearer.
As shown in the figure, outer load 12 is hourglass shape, and tighten up both sides, is the position of stretching into wearer's lower limb herein.Absorbent main body 20 can adopt arbitrarily shape, is rectangle in the illustrated form.
As shown in Figure 2, in the outer load 12, with absorbent main body 20 be arranged on the precalculated position and fixing after, front and back are folding, the engaging zones 12A with the both sides of the 12F of predecessor of outer load 12 and rear body 12B is joined together by heat fused (Hot is melting) etc.Obtain thus the Briefs type disposable urine napkin with the WO of waist opening section and a pair of leg opening part LO of structure shown in Figure 1.
Demonstrate following form: the long side direction of the absorbent main body 20 shown in the figure (is the above-below direction of Fig. 2.Also be the fore-and-aft direction of goods) the width of centre be shorter than outer load 12 will tighten up the width that part is joined.The relation of this width also can be opposite, can also be same width.
Outer load 12 preferably by 2 for example the sheet of water proofing property (Dial aqueous) non-woven fabrics consist of, preferably between these sheet materials, have the elastic telescopic parts, utilize the contractility of these elastic telescopic parts to come with the wearer fit.As described elastic telescopic parts, can use the ribbon of rubber band (yarn go system) or elastic foam etc., preferably use many rubber bands.In illustrated form, rubber band 12C, 12C ... the W broad ways arranges continuously in the lumbar region, only is arranged on two side portions at waist with lower area U, does not arrange at lower crotch region L.By with rubber band 12C, 12C ... be arranged on lumbar region W and waist with on these two parts of lower area U, though the contractility of rubber band 12C itself a little less than, also can contact with the wearer with lower area U at waist as a whole, goods can cosily be fitted in it the wearer.
(absorbent main body)
As shown in Figure 3, absorbent main body 20 has the surface patch 30 of liquid permeability and will see through the absorptive unit 50 that the Liquid Absorption of surface patch keeps.Rear side at absorptive unit 50 is provided with liquid impermeability sheet (being also referred to as back sheet) 70.Rear side at this liquid impermeability sheet 70 is provided with above-mentioned outer load 12.These external both sides have edge 60,60.
(surface patch)
Surface patch 30 has the character through liquid.Therefore, as long as the material of surface patch 30 can show this liquid permeability, can enumerate for example non-woven fabrics of porose or atresia; Porous plastic sheet etc.And, wherein, non-woven fabrics for which kind of raw fibre is not particularly limited.Can enumerate olefin-based such as polyethylene or polypropylene, polyester system, the natural fibers such as the regenerated fibers such as synthetic fibers, artificial silk or copper rayon, cotton such as polyamide-based etc.; Or the two or more composite fibre therefrom selected, composite fibre etc. have been used.And non-woven fabrics can form with arbitrarily processing method manufacturing.As processing method, can enumerate known method, such as water thorn (spunlace) method, spun-bond process, hot rolling method, meltblown, needle point method, hot blast (air-through) method, sticking (pointbond) method of point etc.For example, when needing flexibility, fold (De レ-プ (drape) property), the water acupuncture manipulation is preferred processing method, and when needing bulkiness, soft property, the hot rolling method is preferred processing method.
And surface patch 30 both can be made of 1 sheet, also can be made of the laminated sheet of the sheet gained more than 2 of fitting.Similarly, on in-plane, surface patch 30 both can be made of 1 sheet, also can be made of the sheet more than 2.
(intermediate)
For the liquid that has seen through surface patch 30 is moved to absorber fast, the liquid penetration speed can be set faster than the intermediate (being also referred to as " second ") 40 of surface patch 30.This intermediate not only makes liquid shift to improve fast the absorbent properties of absorber to absorber, can also prevent that the liquid that absorbs from by the phenomenon of absorber " refluence ", making the state that always keeps dry on the surface patch 30.
As intermediate 40, can enumerate or crimped paper sticking with mixing tab, the point of same material, spun-laced nonwoven fabric, process nonwoven pulp fabric, paper pulp and the artificial silk of surface patch 30.Particularly preferably hot-wind nonwoven cloth and spun-bonded non-woven fabrics.
Intermediate (second) 40 is between surface patch 30 and covering piece 58.As shown in Figure 5, also can use the form that intermediate (second) 40 is not set.
The intermediate 40 of diagram in the form is narrower than the width of absorber 56, is arranged on central part, but also can cover whole width and arrange.Length on the long side direction of intermediate 40 can be identical with the length of absorber 56, also can be in the shorter length range centered by the zone of accepting liquid.The representational material of intermediate 40 is non-woven fabrics of liquid permeability excellence.
(absorptive unit)
As absorber 56, absorptive unit 50 has the upper strata absorber 56A that is positioned at surface patch 30 sides and the lower floor absorber 56B adjacent with the downside of this upper strata absorber 56.And, particularly in the diagram form, have the covering piece 58 of the back side of wrapping up at least absorber 56 and side and be arranged on absorber 56 and the rear side position of covering piece 58 (part of downside) between retention tab 80.
(upper strata absorber)
Upper strata absorber 56A is by filament 52,52 ... aggregation form.Filament 52,52 ... aggregation can be by the tow (fibre bundle) that consists of with filament (continuous in fact long fibre) be opened fibre manufacturing.Filament 52 is along fore-and-aft direction (long side direction) continued presence of article.
The unit are consumption of the fiber that is used for upper strata absorber 56A suitably set get final product, for example can be made as 50～120g/m 2, be particularly preferably 60～100g/m 2If fiber unit are consumption is very few, then be easy to occur coming off of superabsorbent polymer, if fiber unit are consumption is too much, then can't adopt and make superabsorbent polymer enter inner manufacture by the outside of fiber aggregate, difficult is processed in transmission on production line etc., so be not preferred.
Material as filament 52, can example such as polysaccharide or derivatives thereof (cellulose, cellulose esters, chitin, chitosan etc.), synthetic high polymer (polyethylene, polypropylene, polyamide, polyester, poly-lactamide (Port リ ラ Network タ ア ミ De), polyvinyl acetate etc.) etc., particularly preferably cellulose esters and cellulose.
As cellulose, can use the cellulose of the plant-derived bodies such as cotton, velveteen, wood pulp or Bacterial cellulose etc., can also use the regenerated celluloses such as artificial silk, regenerated cellulose can be the regenerated cellulose after spinning.
As the cellulose esters that can suit to adopt, can example such as the organic acid esters such as cellulose acetate, cellulose butyrate, cellulose propionate; The mixed acid esters such as cellulose-acetate propionate, cellulose acetate-butyrate, Cellacefate, nitroacetyl cellulose; With cellulose esters derivants such as polycaprolactone grafting cellulose esters etc.These cellulose esters can separately or mix use more than 2 kinds.The viscosity average polymerization degree of cellulose esters for example is about about 50～900, is preferably about about 200～800.The average substitution degree of cellulose esters is for for example about 1.5～3.0 about (for example 2～3).
The average degree of polymerization of cellulose esters for example can be made as 10～1000, be preferably 50～900, more preferably about about 200～800, and the average substitution degree of cellulose esters for example can be made as about about 1～3, be preferably 1～2.15, more preferably about about 1.1～2.0.Can go out to send the average substitution degree of selecting cellulose esters from improving the aspects such as biological degradability.
As cellulose esters, preferred organic acid esters (being the ester that about about 2～4 organic acid forms with carbon number for example), cellulose acetate particularly preferably.By the way, in the situation of cellulose acetate, the artificial urine absorbtivity is about about 0.1 times～0.3 times of own weight.The degree of acetylation of cellulose acetate mostly is greatly about about 43%～62%, especially owing to biological degradability also excellent being preferably about about 30%～50%.Particularly preferred cellulose esters is cellulose diacetate.
Filament can also contain various additives, such as heat stabilizer, coloring agent, oil preparation (oily drug), synergist (step stay り make progress drug), whiteness improving agent etc.
The fineness of filament is preferably 1～10dtex for for example 1～16dtex, more preferably 1～5dtex.Filament can be uncrimped fibers also, but is preferably crimped fibre.The crimpness of crimped fibre for example for per 1 inch 5～75, be preferably per 1 inch 10～50, more preferably about per 1 inch 15～about 50.And, mostly use the equably curling crimped fibre that forms.When using crimped fibre, when can making fluffy and lightweight absorber, can easily utilize interfibrous entanglement to make the high tow of integraty.Cross sectional shape to filament is not particularly limited, such as being the arbitrary shapes such as circle, ellipse, abnormity (such as Y word shape, X word shape, I word shape, R word shape etc.) or hollow form.Filament is take by will be for example as 3,000～1, and 000,000, be preferably about 5,000～about 1,000,000 ultimate fibre binds together and the form of the tow (fibre bundle) that forms is used.Fibre bundle is preferably by consisting of about about 3,000～1,000,000 the integrated bundle of filament.
In the tow, because a little less than the entanglement between filament, can use the contact portion that has filament to bond or the binding agent of the effect of welding, this mainly is in order to keep shape.As binding agent, except the ester plasticizers such as glycerol triacetate, triethylene-glycol diacetate, triethylene glycol dipropionate, dibutyl phthalate, DMEP, triethyl citrate, can also use various resin-bonded agent, particularly can thermoplastic resin.
Comprise resin, water-insoluble or slightly water-soluble resin and the water-soluble resin that shows cohesive force by melting-curing as in the thermoplastic resin of binding agent.Also can share as required water-insoluble or slightly water-soluble resin and water-soluble resin.
As water-insoluble or slightly water-soluble resin, can example such as polyethylene, polypropylene, ethylene-propylene copolymer, the homopolymer of the olefin-based such as vinyl-vinyl acetate copolymer or copolymer, polyvinyl acetate, polymethyl methacrylate, methyl methacrylate-acrylate copolymer, the acrylic resins such as copolymer of (methyl) acrylic monomer and styrenic monomers, polrvinyl chloride, vinyl acetate-vinyl chloride copolymer, polystyrene, the styrenics such as copolymer of styrenic monomers and (methyl) acrylic monomer, the polyester that is modified or is not modified, nylon 11, nylon 12, NYLON610, the polyamide such as nylon 612, rosin derivative (such as rosin ester etc.), hydrocarbon resin (terpene resin for example, dcpd resin, Petropols etc.), hydrogenated hydrocarbons resin etc.These thermoplastic resins can use one or more.
As water-soluble resin, can use various water soluble polymers, be water-soluble resin, acrylic acid series water-soluble resin, polyalkylene oxides, water-soluble polyester, water soluble polyamide etc. such as polyvinyl alcohol, polyvinyl pyrrolidone, polyvinylether, vinyl monomer and ethylene such as copolymer with co-polymerized monomer of carboxyl, sulfonic group or their salt.These water-soluble resins may be used singly or in combination of two or more use.
Can add the various additives such as the stabilization agents such as antioxidant, UV absorbent, filler, plasticizer, antiseptic, antifungus agent in the thermoplastic resin.
Tow can utilize known method manufacturing, thereby repeats no more.Applicable to the bundle of the tow of the cellulose diacetate of absorptive unit 50 by sales such as Celanese Corp. and Daicel chemical industry.The density of the bundle of the tow of cellulose diacetate is about 0.5g/cm 3, gross weight is 400～600kg.
Tie up tow extracted out from this and peel off, open the fine wider band shape that becomes, be desired size and volume.The fine width of opening of tow is arbitrarily, for example can make the width of 100～2000mm, be preferably about the 100mm of width of absorber of goods～300mm about.And, can be by adjusting the density that fine degree is adjusted absorber of opening of tow.
As the fiber opening method of tow, can example such as following method: tow striden ride over opening on the fine roller more than 2, along with the width that advancing of tow progressively enlarges tow is opened fine method; Repeatedly make tow tensioning (elongation) and lax (contraction) open fine method; Use compressed air to widen-method of Kai fibre etc.
On the other hand, as shown in Figure 3, among the absorber 56A of upper strata, superabsorbent polymer granule 54,54 is scattered here and there between fiber ...In this case, preferred superabsorbent polymer granule (SAP granule) 54 disperses at the whole thickness direction of upper strata absorber 56A in fact.The keypoint part enlarged drawing of Fig. 3 schematically provides this state.Need to prove, even in top, bottom and the pars intermedia of upper strata absorber 56A, do not have SAP granule 54 or amount also in seldom the situation, can not be called " disperseing at whole thickness direction ".Therefore, " disperse at whole thickness direction " to refer to, in the absorber 56A of upper strata, the form that " equably " disperses on whole thickness direction, comprise in addition following form: although " unevenly exist " in top, bottom and/or pars intermedia, but still be dispersed in the each several part of top, bottom and pars intermedia.And, as shown in Figure 3, also do not get rid of following form: a part of SAP particle residue comes off and is present in form on the covering piece 58, is present in form on lower floor's absorber adjacent with downside, is present in the form on the retention tab 80 from upper strata absorber 56A at the SAP granule of the lip-deep form of upper strata absorber 56A, a part.
Superabsorbent polymer granule 54 also comprises the implication of " powder body " except " granule ".The particle diameter of employed superabsorbent polymer granule 54 can be preferably 200～1000 μ m for being used for the original particle diameter of this kind absorbent commodity, is particularly preferably 200～400 μ m.As the material of superabsorbent polymer granule 54, can be not particularly limited to use, but preferred water absorption is the above material of 40g/g.As superabsorbent polymer granule 54, comprise starch-series, cellulose-based and synthesized polymer system etc., can use the cross-linking agent of saponified, sodium carboxymethyl cellulose of Starch with Acrylic Acid (salt) graft copolymer, starch acrylonitrile copolymer and acrylic acid (salt) polymer etc.As the shape of superabsorbent polymer granule 54, the material of normally used bulk material shape suits, but also can use the material of other shapes.And, as the superabsorbent polymer granule 54 of upper strata absorber 56A, also can use antibacterial and deodouring superabsorbent polymer granule described later.
As superabsorbent polymer granule 54, suitable use absorption speed is the material below 40 seconds.If absorption speed surpasses 40 seconds, the liquid that then easily supplies in the absorber 56 flow back into the outer what is called refluence phenomenon of absorber.
In addition, as superabsorbent polymer granule 54, suit to use gel strength to be the material more than the 1000Pa.The sticky feeling behind the decrease uptake liquid effectively thus.
Can suitably determine according to desired absorbtivity the unit are consumption of the superabsorbent polymer granule 54 among the absorber 56A of upper strata.Therefore cannot treat different things as the same, the unit are consumption of polymer beads 54 can be 50～350g/m 2, be particularly preferably 150～350g/m 2If the unit are consumption of superabsorbent polymer granule 54 is less than 50g/m 2, then be difficult to guarantee absorbtivity.If this unit are consumption surpasses 350g/m 2, then not only effect reaches capacity, and sends out the sense of discomfort of pressing against (ジ ヤ リ ジ ヤ リ) when causing contacting goods owing to superabsorbent polymer granule 54 excessive.
In case of necessity, can adjust dispersion density or the dispersion volume of superabsorbent polymer granule 54 on the in-plane of upper strata absorber 56A.For example, can make the dispersion volume of drain site of liquid more than other positions.Consider in the situation of difference between male the men's dispersion density (amount) that can improve the front side, the lady's dispersion density (amount) that can improve central part.
Conversely, as shown in Figure 7, part (for example point-like) superabsorbent polymer granule 54 also can be set at the in-plane of upper strata absorber 56A less or do not have a part X of superabsorbent polymer granule 54.Particularly preferably this part X is the fore-and-aft direction central part of article.The fore-and-aft direction scope of this central part X can suitably determine, can elect about 50～60% part of the total length of upper strata absorber 56A as.The amount of superabsorbent polymer granule can suitably determine among this central part X, preferably lacks more than 20 % by weight than the amount before and after it.
In addition, in some situation, upper strata absorber 56A can contain antibacterial granule.Antibacterial granule in this case can be to use granule with the same kind of lower floor's absorber with the same using method of lower floor absorber.
(lower floor's absorber)
The absorber 56B of lower floor disperses antibacterial granule 51 to form in fiber aggregate.As fiber aggregate, also can use the filament aggregation identical with upper strata absorber 56A, when using the short fiber aggregation that a large amount of short fiber 55 is irregular or regularly set forms, can keep antibacterial granule with high density, thereby be preferred.And, as the short fiber aggregation, the cotton official form for filing a lawsuit slurry that can use non-woven fabrics, bulk paper pulp fibres to form.This absorber 56B can use the mixture manufacturing of short fiber 55 and antibacterial granule 51, perhaps can make by scatter antibacterial granule 51 in the aggregation of the short fiber 55 of making in advance.
" short fiber " among the present invention refers to, in fabric (ウ エ Block) except fiber all fibrous materials continuous the long fibre, comprise that not only the such fiber length of general synthetic fibers is the fiber about 2～90mm, also comprise the following fiber of the long 2mm of being of the such fiber of paper pulp fiber.
As short fiber 55, can example such as the olefin-based such as polyethylene or polypropylene, polyester system, regenerated fiber, the cotton/fiber crops/natural fibers such as paper pulp such as synthetic fibers, artificial silk or copper rayon such as polyamide-based.Short fiber 55 both can be hydrophilic fibre, also can be hydrophobic fibre, because to the good and particularly preferably hydrophilic fibre of the liquid supply of antibacterial granule 51.
Adopt in the situation of non-woven fabrics as the short fiber aggregation, its manufacture method is not particularly limited, can uses the suitable method of staple fiber nonwoven fabrics such as making hot-wind nonwoven cloth, resin-bonding (resin bond) non-woven fabrics, air-laid nonwoven fabrics, spun-laced nonwoven fabric, hot-rolling non-woven fabrics, fabric hot rolled nonwoven fabrics, needle punched non-woven fabrics.Especially, because the retention of antibacterial granule is high, preferred air-laid nonwoven fabrics.And, as non-woven fabrics, also can use the lamination non-woven fabrics that forms more than same or different types of non-woven fabrics lamination is two-layer.
The unit are consumption of the fiber that is used for the absorber 56B of lower floor suitably set get final product, can be made as for example 20～80g/m 2, be particularly preferably 30～60g/m 2When the unit are consumption of fiber is very few, be easy to occur coming off of antibacterial granule, when the unit are consumption of fiber is too much, can't adopt and make antibacterial granule enter inner manufacture by the outside of fiber aggregate, perhaps difficult is processed in the transmission on production line etc., so be not preferred.
The suitable setting of the unit are consumption of the antibacterial granule 51 among the absorber 56B of lower floor got final product, can be made as for example 25～200g/m 2, be particularly preferably 60～100g/m 2
On the other hand, antibacterial granule 51 is not particularly limited, as long as can be by bringing into play antibacterial effect with contacting of discharged liquid, can use and not have absorbefacient various inorganic particles etc., but patent documentation described above 5 is described like that, form after superabsorbent polymer and antibiotic substance is integrated suits, and particularly the antibacterial and deodouring superabsorbent polymer granule of following formation suits: described antibacterial and deodouring superabsorbent polymer granule be by will with silver ion replace in the zeolite can ion exchange the zeolite granular that forms of part or all of ion (below be referred to as the antibacterial and deodouring zeolite) be included in the superabsorbent polymer or utilize static that the antibacterial and deodouring zeolite granular is attached on the surface of superabsorbent polymer granule and form.
As the zeolite in the antibacterial and deodouring zeolite, can use in the natural and synthetic zeolite any, from cost with obtain the aspect of stability, preferred synthetic zeolite.The zeolite that can use aptly is the alumina silicate with three-dimensional framework structure, and with formula M 2/nONa 2OAl 2O 32.5SiO 2XH 2O represents.X in the formula is the integer of expression water of crystallization number.M is cation, comprises silver ion and zinc ion and suits as the alumina silicate of cation M.N in the following formula is cationic atomicity.As the concrete example of zeolite, can enumerate such as A type zeolite, X-type zeolite, y-type zeolite, T-shaped zeolite, high silica zeolites etc., consider preferred A type zeolite, X-type zeolite and y-type zeolite, wherein A type zeolite particularly preferably from the aspect of deodorizing effect excellence.
Particle diameter to zeolite is not particularly limited, and uses mean diameter to be generally 0.1～10 μ m, is preferably 0.3～5 μ m, is particularly preferably the zeolite of 0.6～2.5 μ m.When mean diameter is too small, process difficult, when mean diameter was excessive, surface area reduced, and caused deodorizing effect to reduce.
From the aspect of surface area, the micropore diameter of the Porous granule of preferred zeolite and so on is generally 1～10 dust, particularly 3～10 dusts.When micropore diameter is excessive, cause effect to reduce owing to surface area reduces, when too small, the ability that the large abnormal flavour in molecule footpath is produced material absorption reduces.
As the material of working as with above-mentioned antibacterial and deodouring zeolite facies, can use the Zeomic (registered trade mark) of Sinanen Zeomic Co., Ltd..
The antibacterial and deodouring zeolite facies can suitably be set for the addition of superabsorbent polymer, are preferably more than the 500ppm in weight ratio, are particularly preferably 500～3000ppm.When the addition of antibacterial and deodouring zeolite was very few, it is insufficient that antibiosis and deodorization effects becomes, and in the time of too much, is difficult to make antibacterial granule and polymer integrated.
The consumption of antibacterial granule 51 can suitably determine (strengthening consumption etc. in the diaper such as using the adult) according to the performance of antibacterial granule 51, kind and size, the target absorbent properties of absorbent commodity.Particularly in the paper napkin, use in the situation of the superabsorbent polymer granule that is added with above-mentioned antibacterial and deodouring zeolite, contain the antibacterial and deodouring zeolite of 0.02～2.0 % by weight in preferred per 1 goods.When the amount of antibiotic substance was very few, it is insufficient that antibacterial effect becomes, and in the time of too much, cost performance reduces.
In case of necessity, can adjust dispersion density or the dispersion volume of antibacterial granule 51 on the in-plane of the absorber 56B of lower floor.For example, can make the dispersion volume of drain site of liquid more than other positions.Fig. 7 has provided this example, and the amount with the antibacterial granule 51 of the article fore-and-aft direction central part X of the absorber 56B of lower floor is made as more than before and after it in this example.The fore-and-aft direction scope of this central part X can suitably determine, can be about 50～60% part of the total length of the absorber 56B of lower floor.Especially, when the contained antibacterial granule 51 of the absorber 56B of lower floor also has in the absorbefacient situation, can improve the absorbtivity of the concentrated central part of discharged liquid by adopting this structure.And, in this case, even few or do not exist in the situation of superabsorbent polymer granule 54 at the content of the fore-and-aft direction central part superabsorbent polymer granule 54 of upper strata absorber 56A as described above, as absorptive unit 50 integral body, also can not reduce the absorbtivity of central part.
On the other hand, use that (for example above-mentioned antibacterial and deodouring zeolite is not included in the superabsorbent polymer in the situation do not have absorbefacient antibacterial granule 51, in the situation of simple use antibacterial and deodouring zeolite) etc., as required, also can in the absorber 56B of lower floor, contain separately superabsorbent polymer.As superabsorbent polymer in this case, can use the material identical with upper strata absorber 56A.And, in the situation that the upper and lower absorber 56A, 56B contain the superabsorbent polymer granule in the two, the unit are consumption of the superabsorbent polymer granule in each layer identical also can, and also can be different.
(absorber)
In the absorber 56, as long as upper strata absorber 56A is adjacent with the absorber 56B of lower floor, can fix yet, but preferably utilize the junctures such as hot melt cement, glycerol triacetate, binding agent, heat to engage.
Use in the paper napkin the adult that large-sized child uses with the paper napkin and light incontinence, granule content in the preferred absorber 56 is more, and for example the unit are consumption of the unit are consumption of the filament among the preferred upper strata absorber 56A and the fiber among the absorber 56B of lower floor adds up to 150g/m 2Below, simultaneously the unit are consumption of the unit are consumption of the superabsorbent polymer granule 54 among the absorber 56A of upper strata and the antibacterial granule 51 among the absorber 56B of lower floor adds up to 250g/m 2Above.But, in this case, if superabsorbent polymer granule 54 is higher than among the absorber 56B of lower floor antibacterial granule 51 with respect to the weight ratio of fiber aggregate with respect to the weight ratio of filament aggregation among the absorber 56A of upper strata, then owing to the minimizing of fibre gap, discharged liquid is difficult to shift from upper strata absorber 56A to the absorber 56B of lower floor.Therefore, superabsorbent polymer granule 54 is lower than among the absorber 56B of lower floor antibacterial granule 51 with respect to the weight ratio of fiber aggregate with respect to the weight ratio of filament aggregation among the preferred upper strata absorber 56A.
In order to make discharged liquid be easy to be transferred to the absorber 56B of lower floor from upper strata absorber 56A, the density of the filament of preferred upper strata absorber 56A is lower than the density of the fiber of the absorber 56B of lower floor.Specifically, in the filament aggregation of upper strata absorber 56A, fiber unit are consumption can be set as 60～100g/m 2And thickness is 1～10mm, in the fiber aggregate of the absorber 56B of lower floor, fiber unit are consumption can be set as 30～60g/m 2And thickness is 0.2～2mm.
For example can be after making respectively upper strata absorber 56A and the absorber 56B of lower floor, by their laminations are made absorber 56.
Can adopt in addition following manufacturing form: by being set in particular range for fineness, unit are consumption, the thickness of fiber aggregate and the particle diameter of superabsorbent polymer granule 54 of the fiber of upper strata absorber 56A and the absorber 56B of lower floor and the particle diameter of antibacterial granule, make respectively the filament aggregation that is used for upper strata absorber 56A and the fiber aggregate that is used for the absorber 56B of lower floor, after both laminations, mix in the above or scatter respectively superabsorbent polymer granule 54 and antibacterial granule 51.
Specifically, in the filament aggregation of upper strata absorber 56A, the fineness of fiber is set as 1～16dtex, particularly 1～5dtex, fiber unit are consumption is set as 60～100g/m 2And thickness is 1～10mm.In the fiber aggregate of the absorber 56B of lower floor, the fineness of fiber is set as 1～16dtex, particularly 1～5dtex, fiber unit are consumption is set as 30～60g/m 2And the absorber 56B of thickness lower floor is set as 0.2～2mm.And the particle diameter of the superabsorbent polymer granule that upper strata absorber 56A is contained is set as more than the 200 μ m, particularly more than the 250 μ m, make the particle diameter of the contained antibacterial granule 51 of the absorber 56B of lower floor less than 200 μ m, particularly less than 50 μ m.Particle diameter by making antibacterial granule 51 is less than 200 μ m, even hybrid particles to high-density also can form the absorber 56B of lower floor thinly, has advantages of to access whole thinner absorptive unit.
Thus, if after upper strata absorber 56A and the absorber 56B of lower floor is overlapping, on the absorber 56A of upper strata, mix or scatter respectively superabsorbent polymer granule and antibacterial granule, then the superabsorbent polymer granule mainly remains on the upside (upside, inside and the downside that comprise upper strata absorber 56A) of the absorber 56B of lower floor, makes simultaneously antibacterial granule remain on (upside, inside and the downside that comprise the absorber 56A of lower floor) below the absorber 56B of lower floor by upper strata absorber 56A.
About upper strata absorber 56A, because filament is meticulous, filament unit are consumption is very few, the filament aggregation is crossed thin etc. when causing that the space becomes excessive between filament, when perhaps the superabsorbent polymer granule was too small, the superabsorbent polymer granule easily came off in the filament aggregation.Conversely, because excessively thick, the filament unit are consumption of filament is too much, the filament aggregation is blocked up etc. when causing that the space becomes too small between filament, when perhaps excessive the or antibacterial granule of superabsorbent polymer granule is excessive, or be difficult to make superabsorbent polymer granule 54 to enter the inside of filament aggregation, or antibacterial granule is difficult to by upper strata absorber 56A, difficult is processed in transmission on production line etc., so be not preferred.
In addition, about the absorber 56B of lower floor, when because fiber is meticulous, fiber unit are consumption is very few, fiber aggregate is crossed thin etc. when causing fiber gap to become excessive, when perhaps antibacterial granule is too small, antibacterial granule easily comes off from fiber aggregate, when situation is opposite, is difficult to make antibacterial granule to enter the inside of fiber aggregate, or the transmission on production line etc. processes difficult, so be not preferred.
And then, by the fineness among upper strata absorber 56A and the absorber 56B of lower floor is set in the above-mentioned scope, can obtain soft sense of touch.
(covering piece)
As covering piece 58, can use thin paper (tissue paper), particularly crimped paper, non-woven fabrics, multi-layer nonwoven fabrics (Port リ ラ ミ is Woven cloth not), open foraminate sheet material etc.But, the sheet material of the superabsorbent polymer granule that preferably can not come off.Use non-woven fabrics to replace in the situation of crimped paper, hydrophilic SMMS (spun-bonded/melt-blown/meltblown/spunbonded) non-woven fabrics suits especially, and its material can be used polypropylene, polyethylene/polypropylene etc.The unit are consumption is preferably 8～20g/m 2, be particularly preferably 10～15g/m 2
Especially, when using the artificial urine absorbtivitys more than the fiber aggregate (for example the artificial urine absorbtivity is the fiber aggregate about 5～30 times) of filament aggregation as covering piece 58, can replenish by covering piece 58 water absorbing properties of absorber 56, can improve initial stage infiltration rate and diffusibility, so be preferred.
This covering piece 58 can also be the form that for example only coats as shown in Figure 4 the back side and the side of this layer except the form that coats as shown in Figure 3 whole absorber 56.And can be not shown following form: with crimped paper or non-woven fabrics only cover the top and side of absorber 56, form below covering with liquid impermeability sheets such as polyethylene; With crimped paper or non-textile mulch absorber 56 top, cover side and following (these various materials are elements of covering piece) such as forms with liquid impermeability sheets such as polyethylene.In case of necessity, also can be with the form of 2 synusia material clamping absorbers 56 up and down or only be arranged on following form, not preferred but these forms owing to be difficult to prevent the movement of superabsorbent polymer granule.
(retention tab)
Superabsorbent polymer granule 54, antibacterial granule 51 come off from absorber 56 in the process of circulation before manufacturing process or consumer's use sometimes.When touching with hands, produce when the concavo-convex meeting of the particle swarm under coming off is used in consumer and send out the sense of discomfort of pressing against.In order to address this problem, preferably between the rear side position of absorber 56 and covering piece 58 (part of downside), there is the retention tab 80 of the retention with granule.This retention tab 80 has strengthened covering pieces 58 such as only depending on thin paper (crimped paper) and not enough toughness, alleviates or the sense of discomfort when touching with hands when having prevented that consumer from using.
Material to retention tab 80 is not particularly limited, as long as have the retention of granule.Specifically, can enumerate non-woven fabrics, curling paper pulp (Volume Shrink パ Le プ), low absorbefacient cotton fiber (such as process the material that forms etc. to unskimmed cotton fiber, through cotton fiber, the rayon fiber of defat with waterproofing agent (Dial water drug) or water-repelling agent), polyethylene fibre, polyester fiber, acrylic fiber, polypropylene fibre, silk, cotton, fiber crops, nylon, polyurethane, typel etc.
Retention tab 80 is in the situation of non-woven fabrics, and the compression energy that this retention tab 80 can be based on the KES test is 0.01～10.00gfcm/cm 2, be preferably 0.01～1.00gfcm/cm 2And compression resilience is 10～100%, be preferably 70～100% non-woven fabrics.
The purpose of design retention tab 80 is to keep such as come off from absorber 56 (disengaging) to the superabsorbent polymer granule 54 of below etc.Therefore, for the granule that detaches, owing to contacting with user with retention tab 80 across covering piece 58, user is produced send out the sense of discomfort of pressing against.Particularly have above-mentioned compression energy and the non-woven fabrics of compression resilience, can bring into play fully the maintenance effect.
And, because being held sheet 80, the granule that detaches keeps, can be not mobile at covering piece 58, therefore needn't worry to occur the absorbability skewness.Especially, mobile in retention tab 80 in order to prevent the superabsorbent polymer granule, can have fusible hot melt cement etc. in retention tab 80 coatings in advance.And, can also prevent that granule is mobile in retention tab 80 by top (towards the face of the face of use side) of retention tab 80 made matsurface.As the roughened or raising method that carries out for this reason, can enumerate the marble stricture of vagina processing (マ-Block Le processing) that forms non-wire side (not being wire side) when making non-woven fabrics; Utilize acupuncture to process; Carry out scratch brushing (Block ラ シ Star Application グ) processing etc.
Retention tab 80 can only be arranged on the below of absorber 56 like that shown in Fig. 3 waits, the side that can also pass through as shown in Figure 7 absorber 56 is rolled onto the top of absorber 56 always and extends and exists.And, can be with the retention tab 80 overlapping uses more than two.
Above-mentioned example is the example that retention tab 80 is set between the rear side position of absorber 56 and covering piece 58, retention tab 80 also can be than covering piece 58 side of backrest face (this form is not shown) more, in a word, as long as with respect to absorber 56 overleaf side retention tab 80 is set, just can alleviate or eliminate the back side (Li face from goods) sense of discomfort of pressing against of when contact generation.
In the situation that retention tab 80 is arranged between absorber 56 and the liquid impermeability sheet 70, if use the artificial urine absorbtivity more than the fiber aggregate of filament aggregation (for example artificial urine absorbtivity be about 5 times～form retention tab 80 during about 30 times fiber aggregate), then can replenish by retention tab 80 water absorbing properties of absorber 56, can improve initial stage infiltration rate and diffusibility, so be preferred.
(liquid impermeability sheet)
Liquid impermeability sheet 70 is arranged on the sheet of the rear side of absorber 56, has absorptive unit 50 between this sheet and surface patch 30.Material to liquid impermeability sheet 70 is not particularly limited, only otherwise the permeate body gets final product, and can example such as the olefin-based resins such as polyethylene, polypropylene; The lamination non-woven fabrics that the lamination non-woven fabrics forms on polythene strip etc.; Non-woven fabrics (in this case, consisting of liquid impermeability sheet by waterproof membrane and non-woven fabrics) by waterproof membrane being existed wherein and substantially guaranteed opaque liquid etc.In addition, the material that can certainly enumerate opaque liquid and have poisture-penetrability, in recent years this sultry from preventing (system レ) sense angle and preferably use this material.As this opaque liquid and the sheet with material of poisture-penetrability, can enumerate the little porous sheet that obtains such as following: inorganic filler is mixing in the olefin-based resins such as polyethylene, polypropylene, after being shaped to sheet material, stretch at single shaft or biaxially oriented, obtain little porous sheet.
Also can be extended to use face (not shown) and prevent that liquid from seeing through the side by making liquid impermeability sheet 70 walk around the side, but in embodiment, for side leakage, prevent by between the double-deck shaping piece 64 that forms edge 60, the 2nd liquid impermeability sheet 72 being set.That is, because the 2nd liquid impermeability sheet 72 extends to the part that erects of edge 60, thereby can prevent that the liquid of surfacewise sheet 30 horizontal proliferation or the soft stool between the edge 60,60 from permeating in a lateral direction in the side.
(edge)
Be located at the edge 60, the 60th of goods both sides, design in order to prevent on the sheet 30 surfacewise laterally mobile urine or the side leakage of soft stool.Edge 60 in the diagram is double-deck water proofing property non-woven fabric plates of lamination and forming, and it has covered the part that is folded into to the below of surface patch 30 by the rear side of absorber 56, forms in the mode that protrudes from face side.In order to stop on the sheet 30 surfacewise laterally mobile urine, particularly the sidepiece with liquid impermeability sheet 70 is inserted between double-deck non-woven fabric plate, extends to the middle part (in the way) of the edge 60 that protrudes from face side always.
And, can suitably design the shape of edge 60 itself, in illustrated example, edge 60,60 end, front and back are fixed with folded state, and the fore-and-aft direction pars intermedia is not fixed, and at the leading section of the projected direction of edge 60 and pars intermedia along fore-and-aft direction with the fixing elastic telescopic parts (for example rubber band 62) of extended state, under user mode, utilize the contractility of these elastic telescopic parts that edge 60 is erected.
(other)
In addition, though do not provide among the figure, each component parts of absorbent main body 20 can interfix by solid (ベ タ) coating, pearl (bead) coating or the spiral coating etc. of hot melt cement etc.
(example of belt disposable urine napkin)
On the other hand, Fig. 5 and Fig. 6 have provided the example of belt disposable urine napkin.Fig. 6 is the 9-9 alignment view of Fig. 5, yet has carried out the slightly diagram of exaggeration for absorbent main body 20.
Belt disposable urine napkin 10A has fastener (the Off ア ス ニ Application グ) sheet that is installed on diaper dorsal part both side ends, stationary plane (ending face) at this fastener sheet has hook part, the back sheet that will consist of simultaneously the back side of described diaper is made non-woven fabrics lamination body, when wearing diaper, the hook part of described fastener sheet can be engaged to the optional position on the surface of described back sheet.
Absorbent main body 20 has absorptive unit 50 between surface patch 30 and liquid impermeability sheet 70, as absorber 56, absorptive unit 50 has adjacent upper strata absorber 56A and the absorber 56B of lower floor.Absorber 56 integral body are wrapped by sheet 58 parcels, overlook to be rectangle.Between absorber 56 and covering piece 58, be provided with retention tab 80.
In addition, between surface patch 30 and absorber 56, there is intermediate 40.Liquid impermeability sheet 70 be width greater than the rectangle of absorber 56, be provided with the back sheet 12A that is consisted of by non-woven fabrics of hourglass shape in its outside.
Surface patch 30 be width greater than the rectangle of absorber 56, it is extended to the lateral margin position slightly laterally than absorber 56, and is fixing with liquid impermeability sheet 70 by hot melt cement etc.
Be formed with the edge 60A of the use face of protruding from side in the both sides of diaper, this edge 60A by in fact barrier flaps 64 that the non-woven fabrics of continued presence on the width consists of and elastic telescopic parts (for example consisted of by rubber band more than 1 or 2 as around the shank with the rubber band 62 of elastic telescopic parts) consist of.130 is the fastener sheet that is made of magic tape (face Off ア ス Na-).
The inner face of barrier flaps 64 has fixedly top in the position of the lateral margin that leaves surface patch 30, and fixedly top is to the extension edge of liquid impermeability sheet 70 by this, and the width Outboard Sections is fixed by hot melt cement etc.The outside of barrier flaps 64 is fixed on the back sheet 12A by hot melt cement etc. at its lower surface.In addition, be provided with pad limit (ガ ス ケ Star ト カ Off ス) elastic telescopic parts (for example rubber band 66).
The fixedly top inner face of barrier flaps 64 and liquid impermeability sheet 70 forms the end that erects of edge 60A.Locate around shank, this inboard that erects end is the free part that is not fixed on the goods body, and this freedom part erects by the contractility of rubber band 62.
In this example, by using magic tape as fastener sheet 130, thereby can mechanically be fixed on the back sheet 12A.Therefore, can omit so-called thread gluing hair side, and, the fixed position of fastener sheet 130 can freely be selected.
Fastener sheet 130 has hook part 130A by engaging overleaf the base portion of plastics, multi-layer nonwoven fabrics, made of paper etc. fastener base material on the sheet 12A such as cement in front.Hook part 130A is bonded on the fastener base material by cement.Hook part 130A has a plurality of snap-latch pieces in its outside.Than hook part 130A more a side of front end have the temporary fixed cement 130B of section.In the later stage of assembling goods, by the temporary fixed cement 130B of section being bonded in peeling off of the front that prevents fastener sheet 130 on the barrier flaps 64.During use, resist this cohesive force and peel off, take the front of fastener sheet 130 to predecessor.Than the temporary fixed cement 130B of section more a side of front end expose the fastener base material, become protruding head (the plucking body タ Block) section that lifts.
Peristome side in the predecessor, the inner face side of sheet 12A is provided with that ((タ-ゲ Star ト printing シ-ト) 74 for the targeting printed sheet of デ ザ イ Application シ-ト) as pattern segments overleaf, implement the targeting printing of pattern (this pattern is the labelling of position of the hook part 130A of attachment fastener sheet 130), and be printed as and recognize from the outside by back sheet 12A.
When wearing diaper, owing to diaper is worn on the health with ship shape, and because the contractility role of rubber band 62, edge 60A contractility by rubber band 62 around shank erects.
The space that is surrounded by rising portions forms the space of sealing urine or soft stool.When urinating in this space, this urine is absorbed in the absorber 56 by surface patch 30, and simultaneously, for the solid constituent of soft stool, the rising portions of edge 60A becomes barrier, prevents that soft stool from crossing.In the unexpected situation, cross the erecting the amphi position lateral margin of rising portions and the urine that laterally spills can prevent side leakage owing to the barrier effect of plane contact section.
In this form, form the barrier flaps 64 respectively erect edge and preferably be essentially opaque liquid (half liquid permeability also can) but not liquid permeability.And, also can make it have the character of repelling liquid by surface patch of the present invention (non-woven fabrics lamination body) being carried out silicon processing etc.In any case, to be respectively breathability and barrier flaps 64 and back sheet 12A be respectively that water pressure resistance is 100mmH for preferred barrier flaps 64 and back sheet 12A 2The sheet that O is above.Thus, can show breathability at the width sidepiece of goods, prevent wearer's feeling of oppression and heat.
For other aspects (such as use material of each several part etc.), identical with the situation of above-mentioned brief-shaped paper diaper, the description thereof will be omitted at this.
Industrial applicibility
The present invention is suitable for the absorbent commodities such as absorption pad that share with the paper napkin, sanitary towel, incontinence pad, diaper cover (お む つ カ バ-).

Claims (11)

1. absorbent commodity, this absorbent commodity has: surface patch, it is arranged at use face side; Liquid impermeability sheet, it is arranged at rear side; And absorptive unit, it is arranged between described surface patch and the described liquid impermeability sheet, accepts and keep having seen through the liquid of surface patch, and described absorbent commodity is characterised in that,
Described absorptive unit has the upper strata absorber that is positioned at described surface patch side and the lower floor absorber adjacent with the downside of this upper strata absorber,
Described upper strata absorber is the superabsorbent polymer granule to be dispersed in the filament aggregation of a large amount of filaments of article fore-and-aft direction continued presence form,
Described lower floor absorber is dispersed in the fiber aggregate antibacterial granule and forms,
The density of the filament of described upper strata absorber is lower than the density of the fiber of described lower floor absorber,
In the filament aggregation of upper strata absorber, the fineness of filament is 1～16dtex, and filament unit are consumption is 60～100g/m 2And thickness is 1～10mm,
In the fiber aggregate of lower floor's absorber, the fineness of fiber is 1～16dtex, and fiber unit are consumption is 30～60g/m 2And thickness is 0.2～2mm,
The particle diameter of the superabsorbent polymer granule that described upper strata absorber is contained is more than the 200 μ m, and the particle diameter of the antibacterial granule that described lower floor absorber is contained is less than 200 μ m.
2. absorbent commodity as claimed in claim 1, wherein,
The unit are consumption of the superabsorbent polymer granule in the absorber of described upper strata is 50～350g/m 2, the unit are consumption of the antibacterial granule in the described lower floor absorber is 25～200g/m 2
3. absorbent commodity as claimed in claim 2, wherein,
The unit are consumption of the described fiber aggregate in the unit are consumption of the described filament aggregation in the absorber of described upper strata and the described lower floor absorber add up to 150g/m 2Below,
The unit are consumption of the described antibacterial granule in the unit are consumption of the described superabsorbent polymer granule in the absorber of described upper strata and the described lower floor absorber add up to 250g/m 2It is above,
Described superabsorbent polymer Particle Phase in the absorber of described upper strata for the weight ratio of described filament aggregation less than the described antibacterial granule of the described lower floor absorber weight ratio with respect to described fiber aggregate.
4. such as each described absorbent commodity of claim 1～3, wherein, the fiber aggregate of described lower floor absorber is that a large amount of short fibers is assembled the short fiber aggregation that forms.
5. absorbent commodity as claimed in claim 4, wherein, described lower floor absorber is the air-laid nonwoven fabrics that the mixture take described fiber and described antibacterial granule forms as prepared using air lay method.
6. such as each described absorbent commodity of claim 1～3, wherein, the antibacterial granule of described lower floor absorber is antibacterial and deodouring superabsorbent polymer granule.
7. such as each described absorbent commodity of claim 1～3, wherein, the superabsorbent polymer granule of described upper strata absorber is antibacterial and deodouring superabsorbent polymer granule.
8. absorbent commodity as claimed in claim 6, wherein, described antibacterial and deodouring superabsorbent polymer granule be following zeolite granular is included in form in the superabsorbent polymer granule or utilize static that described zeolite granular is attached on the surface of superabsorbent polymer granule to form, described zeolite granular be with silver ion replace in the zeolite can ion exchange the zeolite granular that forms of part or all of ion.
9. such as each described absorbent commodity of claim 1～3, wherein, the zone of described upper strata absorber before and after the content that the fore-and-aft direction central part of article has a described superabsorbent polymer granule is lower than it, or have the zone that does not have described superabsorbent polymer granule.
10. such as each described absorbent commodity of claim 1～3, wherein, the zone of described lower floor absorber before and after the content that the fore-and-aft direction central part of article has a described antibacterial granule is higher than it.
11. the manufacture method of an absorptive unit, the method is by after will overlapping on the fiber aggregate along the filament aggregation of a large amount of filaments of article fore-and-aft direction continued presence, be that superabsorbent polymer granule more than the 200 μ m and particle diameter are less than the antibacterial granule of 200 μ m by mixing on this filament aggregation or scattering respectively particle diameter
Make thus the method for the absorptive unit that possesses upper strata absorber and lower floor's absorber,
Described upper strata absorber is dispersed in the described filament aggregation superabsorbent polymer granule and forms, and described lower floor absorber is dispersed in the fiber aggregate antibacterial granule and forms, and adjacent with the downside of described upper strata absorber,
This manufacture method is characterised in that,
Make the density of the filament that forms described upper strata absorber be lower than the density of the fiber that forms described lower floor absorber,
Make the antibacterial granule of described distribution remain on upside, inside and the downside of described lower floor absorber by described upper strata absorber.
CN200780019899XA 2006-05-31 2007-05-30 Absorptive article and method of producing absorbent element Active CN101453971B (en)

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WO2007139154A1 (en) 2007-12-06
KR101443872B1 (en) 2014-09-24

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