CN1192137C - Pulp-modified bicomponent contiunous filament nonwoven webs - Google Patents

Pulp-modified bicomponent contiunous filament nonwoven webs Download PDF

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Publication number
CN1192137C
CN1192137C CNB998155411A CN99815541A CN1192137C CN 1192137 C CN1192137 C CN 1192137C CN B998155411 A CNB998155411 A CN B998155411A CN 99815541 A CN99815541 A CN 99815541A CN 1192137 C CN1192137 C CN 1192137C
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CN
China
Prior art keywords
nonwoven web
polymer
web composite
absorbent nonwoven
weight
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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CNB998155411A
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Chinese (zh)
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CN1342230A (en
Inventor
D·J·麦多瓦尔
S·E·马蒙
C·C·克雷甘
X·宁
D·L·迈尔斯
J·M·德尔曼
B·D·哈伊尼斯
J·L·麦马努斯
C·A·史密斯
K·E·史密斯
D·F·克拉克
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Kimberly Clark Worldwide Inc
Kimberly Clark Corp
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Kimberly Clark Worldwide Inc
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Publication of CN1342230A publication Critical patent/CN1342230A/en
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Publication of CN1192137C publication Critical patent/CN1192137C/en
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/225—Mixtures of macromolecular compounds
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/26—Wood pulp
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • 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
    • A61F13/531—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 a homogeneous composition through the thickness of the pad

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Materials Engineering (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Wood Science & Technology (AREA)
  • Nonwoven Fabrics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

Absorbent nonwoven web composites exhibit a combination of excellent strength, softness and absorbency. The composites utilize a combination of substantially continuous bicomponent thermoplastic filaments, and pulp fibers. The substantially continuous bicomponent filaments distribute liquid insults and contribute durability and softness. The pulp fibers and, optionally, a superabsorbent, absorb and contain the liquid.

Description

Pulp-modified bicomponent contiunous filament nonwoven webs
Invention field
The present invention relates to the nonwoven web composite, it has good intensity, flexibility, flexibility and absorbability concurrently.More particularly, target of the present invention is the nonwoven web composite that comprises the combination of the oar dregs of rice and thermoplasticity bi-component continuous filament yarn.The described oar dregs of rice can mix with one or more super-absorbent materials.
Background of invention
Target of the present invention is a kind of good nonwoven web composite products with many desired properties.
Know all generally that in this area the non-woven long filament of bi-component is with at least two kinds of different polymer, the thermoplastic filament of combining in non-homogeneous mode.For example, two kinds of polymer can not carry out even blend and with configuration combination arranged side by side, thereby first side of long filament is made up of first polymer " A ", and second side of long filament is made up of second polymer " B ".Perhaps, this polymer also can make the exodermis of long filament be made up of first polymer " A " by skin/core configuration combination, and inner core then is made up of second polymer " B ".Perhaps, this polymer can be with the configuration combination of " oceanic island ", and wherein, the island of one or more first polymer " A " appear in the ocean of second polymer " B ".Other non-homogeneous configuration also is possible.
Bicomponent filament has the combination of desired properties.For example, some acrylic resin produces soft especially by force and not long filament.Some polyvinyl resin produces soft and not strong especially long filament.These two kinds of resin combination are formed the non-woven long filament of bi-component together, just can obtain the combination that mixes of intensity and flexibility.
Open already, with bicomponent filament and carbon granules, zeolite, ion exchange resin, carbon fiber, sterilization fiber and/or GAS ABSORPTION fiber combinations, be used for particular filter.The United States Patent (USP) 5,670,044 of authorizing people such as Ogata discloses in this class combination and has adopted the double-component melt-blown long filament, to be used for the column filter.In this case, bicomponent filament contains high-melting-point polymer and low melting point polymer.The long filament of filter is superimposed together, as long as just can bond together by the fusing low-melting component.
Pulp fiber has been used for some absorbability to be used, to improve absorbability.The United States Patent (USP) 4,530,353 of authorizing Lauritzen discloses pulp fiber and the segment bicomponent fiber makes up, and is used for making the absorbability bandage.In this case, fiber also contains high-melting-point and low melting point polymer.As long as by the fusing low-melting component, staple just can bond together.
Need or wishing at present has a kind of absorbent nonwoven web composite that has durability and flexibility and the liquid that can distribute well concurrently.For all important diaper of comfortableness, intensity and absorbability, training pants, wipe away handkerchief and other personal care absorbent goods, all have this needs.
Summary of the invention
The personal care absorbent goods that the present invention aims to provide a kind of improved absorbent nonwoven web composite and makes with this improvement composite.This absorbent nonwoven web composite comprises a matrix fiber net of being made up of bi-component thermoplastic nonwoven long filament continuous substantially on the length.In the continuous filament yarn matrix, contain a certain amount of pulp fiber.
Length is not prescinded in the nonwoven web forming process basic bicomponent filament continuously is cut into the segment long filament of lacking less than 1 inch to several inches than length, has better liquid distribution.Preferably, choose the polymer in the bicomponent filament, make at least a polymer provide intensity and durability, and at least a polymer provides flexibility for this nonwoven web for this nonwoven web.May constitute the absorbability pulp fiber of absorbent nonwoven web composite about 97%, can be included in better in the long again continuous filament yarn matrix of existing intensity and durability, length.
Remember foregoing, characteristics of the present invention and advantage just are to provide the absorbent nonwoven web composite that has durability and flexibility concurrently.
Another characteristics of the present invention and advantage are to provide a kind of absorbent nonwoven web composite that can hold the high-load pulp fiber in the continuous filament yarn matrix, no matter pulp fiber is hygrometric state or dry state.In the continuous filament yarn matrix, can also contain a kind of super-absorbent material.
Another characteristics of the present invention and advantage provide a kind of absorbing products, for example, diaper, this diaper is owing to adopting absorbent nonwoven web composite of the present invention to have comfortableness, intensity and premium properties.
Definition
Term " supatex fabric or fiber web ", but be meant that a kind of its structure is each fiber or line lay but do not resemble the fiber web that certain rule or recognition method are arranged the knitted fabric alternately each other.Formed supatex fabric or fiber web with many kinds of methods already, for example, meltblown, spun-bond process, air lay method become the net method with bonded carded.The basis weight of supatex fabric is usually with the ounce (osy) of every square yard of material or every square metre gram number (gsm) expression, and effective fiber diameter is represented (annotating: be converted into gsm from osy, osy taken advantage of 33.91) with μ m usually.
Term " microfiber " is meant that average diameter is not more than the thin diameter fibers of about 75 μ m, and for example, average diameter is the fiber of the about 50 μ m of about 1 μ m-, or more particularly, average diameter is the fiber of the about 30 μ m of about 1 μ m-.Another conventional unit of fibre diameter is " dawn ", and it is defined as the gram number of per 9000 a meters long fiber.For the circular cross-section fiber, " dawn " can by with μ m be unit fibre diameter square, multiply by with g/cm 3Be the density of unit, multiply by 0.00707 again and calculate.Lower dawn numerical table shows thinner fiber, and higher dawn numerical table shows thicker fiber.For example, diameter polypropylene fibre that is 15 μ m can by first square, multiply by 0.89g/cm again 3With multiply by 0.00707 and be converted to the dawn number.Therefore, the dawn number of the polypropylene fibre of one 15 μ m is about 1.42 (15 2* 0.89 * 0.00707=1.415).Outside the U.S., unit more commonly used is " spy ", and it is defined as the gram number of every km fiber." spy " can calculate from dawn/9.
Term " spun-bonded fibre " is meant the thin diameter fibers that forms with following method: extrude the fine, soft fur pore with molten thermoplastic many circles or other shape from spinning head, form long filament, reduce to extrude the diameter of long filament then rapidly, as press people's such as Appel United States Patent (USP) 4,340,563, people's such as Dorschner United States Patent (USP) 3,692,618, people's such as Matsuki United States Patent (USP) 3,802,817, the United States Patent (USP) 3 of Kinney, 338,992 and 3,341,394, the United States Patent (USP) of Hartman, 3,502,763, the United States Patent (USP) 3 of Petersen, 502,538 and people's such as Dobo United States Patent (USP) 3,542, described methods such as 615, each document are done as a wholely to be included in all that this is for reference.Spun-bonded fibre will generally cannot not be sticking when they are deposited on the collection surface through Quenching Treatment.Spun-bonded fibre generally is continuous, and average diameter is often greater than about 7 μ m, more specifically, and about 10-30 μ m.
Term " meltblown fibers " is meant a kind of fiber that is formed by following method: a kind of molten thermoplastic is extruded into molten thread or long filament from many thin mouthful of normally circular mould pores, enter and (for example assemble heated at high speed gas, air) stream, the latter attenuates the filament diameter of molten thermoplastic, and this fiber may have the microfiber diameter.Then, meltblown fibers is carried and deposited to by high velocity air to be collected on the surface, forms the meltblown fiber web of unordered dispersion.This technology is disclosed in, for example, and in people's such as Butin the U.S. Patent number 3,849,241.Meltblown fibers is a microfiber, can be continuous, also can be discontinuous, and diameter is generally less than about 10 μ m, in the time of on being deposited on the collection surface, generally is self-adhesive.Used meltblown fibers is continuous substantially on length among the present invention.
Term " pulp fiber " is meant from the fiber of natural resources such as wooden or non-wooden vegetal inspired one-tenth.Woody plant comprises, for example, and deciduous tree and coniferous tree.Non-Woody plant comprises, for example, and cotton, flax, Spanish grass (Esparto), Asclepias, straw, jute, hemp and bagasse.
Term " average pulp fiber length " is meant the weighted average oar dregs of rice length that the Kajaani fibre analysis instrument FS-100 type with the Kajaani Oy electronics corporation sale of Finland Kajaani records.In this test method, handle a fiber sample with a kind of maceration extract, to guarantee not exist fibre bundle or the end of a thread.Be dispersed in each fiber sample in the hot water and be diluted to about 0.001% concentration.From weak solution, take out about 50-500ml as each test specimen, test with standard K ajaani fibre analysis method.Weight averaged fiber length can be represented by the formula:
Σ x i > 0 k ( X i * n i ) / n
Wherein, the maximum fibre length of k=,
X i=each fibre length,
n i=length is X iThe radical of fiber,
And the tested fiber sum of n=.
Term " super-absorbent material " is meant a kind of swellable in water but water-fast organic or inorganic material, under optimum condition, in the sodium-chloride water solution of 0.9 weight %, can absorb its deadweight at least about 20 times, preferably at least about 30 times.
Term " polymer " " generally comprise, but be not limited to homopolymers, copolymer (comprise, for example, block, grafting, random and alternate copolymer), terpolymer etc., and their blend or modifier.In addition, unless otherwise specifically limited, term " polymer " " will comprise all possible geometric configuration of material.This class configuration includes, but not limited to complete same, a same and random symmetries.
Term " bicomponent filament or fiber " is meant to be extruded from extruder separately respectively by at least two kinds of polymer but is spun and forms the fiber of a fiber.Polymer is gone up the zones of different that is arranged in consistently in the bicomponent fiber cross section substantially and is extended continuously along the length of bicomponent fiber.A kind of like this configuration of bicomponent fiber can be, for example, a kind of polymer is centered around skin/core pattern around the another kind of polymer and arranges, arranges side by side or the arranging of " oceanic island ".Bicomponent fiber is disclosed in people's such as Kaneko United States Patent (USP) 5,108,820, and in people's such as people's such as Strack United States Patent (USP) 5,336,552 and Pike the United States Patent (USP) 5,382,400, each list of references is done as a wholely to be included in all that this is for reference.For bicomponent fiber, polymer can in 75/25,50/50,25/75 or any other required ratio exist.Additive commonly used can join in one or both polymer flows as pigment and surfactant, or be coated on filament surface.
Term " continuous substantially long filament or fiber " is meant long filament or the fiber of extruding preparation from a spinning head, includes, but not limited to spunbond and meltblown fibers, and this fiber former length before forming nonwoven web or fabric is not cut off.The average length scope of continuous substantially long filament or fiber can be from surpassing about 15cm to surpassing 1 meter, and the longest is the length of formed nonwoven web or fabric.The definition of " continuous substantially long filament or fiber " comprises that those were not cut off before forming nonwoven web or fabric, but wants cut fiber interior when cutting nonwoven web or fabric afterwards.
Term " staple " is meant that natural fabric or artificial filament are forming the fiber that cuts off before the fiber web, and its average length scope is about 0.1-15cm, more commonly about 0.2-7cm.
Term " personal care absorbent goods " comprises diaper, training pants, swimsuit, absorbent pants, baby wipe handkerchief, adult-incontinence articles and women sanitary articles.
Term " air-flowing type bonding " or " TAB " are meant a kind of bonded nonwoven thing, for example, the method for bi-component fibrous reticulum, wherein, the hot-air of one of polymer that forces temperature to be enough to melt to make this fibroreticulate fiber is by this fiber web.Air velocity is generally per minute 100-500 foot, and residence time can reach 6 seconds.The fusing of polymer and solidifying again causes bonding.The changeability of air-flow bonding is limited, thereby generally is counted as the second step bonding process.Because TAB need melt at least a component and just can finish bonding, this method only limits to the two component fibers net, as bi-component fibrous reticulum or contain the fiber web of a kind of caking property fiber or powder.
Term " focus bonding " relates to be allowed between the fabric that will bond or the fiber web stack and ultra-sonic welded roller by a heating.Stack is common, but not always, certain decorative pattern is arranged, and whole like this fabric is all bonded with regard to unlikely whole surface.Therefore, also for for the purpose of the function, various stack decorative patterns have been developed for attractive in appearance.What propose in the United States Patent (USP) 3,855,046 that an example of decorative pattern is Hansen and Pennings has one by one Hansen Pennings decorative pattern or " a H﹠amp; P " decorative pattern, 200 the bonding point/inches of having an appointment 2, have about 30% bond area.H﹠amp; The P decorative pattern has square points or pin mark bond area, and wherein, the length of side of each pin mark is 0.038 inch (0.965mm), and the pin mark spacing is 0.070 inch (1.778mm), and the bonding degree of depth is 0.023 inch (0.584mm).Formed decorative pattern has about 29.5% bond area.Hansen that another kind of point bonding decorative pattern is expansion and Pennings or " EHP " bonding decorative pattern, it is that 0.037 inch (0.94mm), pin spacing produce 15% bond area from the square pin mark of 0.097 inch (2.464mm) and the degree of depth 0.039 inch (0.991mm) with the length of side.The representative point bonding decorative pattern that another kind is called " 714 " has square pin mark bond area, and wherein, the length of side of each pin mark is 0.023 inch, pin spacing from being that 0.062 inch (1.575mm) and the degree of depth that bonds are 0.033 inch (0.838mm).The bond area of the decorative pattern that forms is 15%.Also having a kind of highway tread pattern is C-star decorative pattern, and its bond area is about 16.9%.C-star decorative pattern has one to be launched staggered rod or the design of raft shape that star interrupts.Other highway tread pattern comprises the diamond decorative pattern: repeat and the diamond shape of slightly inclined and look worthy of the name the line self-figure sample that resembles window screening.In general, the excursion of bond area percentage is about 10%-about 30% in the fabric laminated fiber web.As knowing in this area, point bonding combines laminate layers by long filament and/or fiber in each layer of bonding, also makes each layer have globality.
The preferred embodiment of the invention describes in detail
Target of the present invention is a kind of absorbent nonwoven web composite, and it comprises continuous substantially bicomponent thermoplastic filament and is included in pulp fiber between the long filament.This absorbent nonwoven web composite contains have an appointment 5-97 weight % pulp fiber and the continuous substantially bicomponent thermoplastic filament of about 3-95 weight %.Preferably, this absorbent nonwoven web composite contains have an appointment 35-95 weight % pulp fiber and the continuous substantially bicomponent thermoplastic filament of about 5-65 weight %.More preferably, this absorbent nonwoven web composite contains have an appointment 50-95 weight % pulp fiber and the continuous substantially bicomponent thermoplastic filament of about 5-50 weight %.
Substantially continuous bicomponent thermoplastic filament can have above-mentioned any bicomponent configuration.Preferred long filament has configuration arranged side by side or skin/core configuration.In this class configuration, the polymer in long filament and the long filament all is continuous substantially in the longitudinal direction.Substantially continuous long filament can be a spun-bonded continuous yarn, also can be meltblown microfibers, and average diameter is generally about 1-75 μ m.Preferably, the average diameter of basic continuous filament yarn is about 1-50 μ m, more preferably from about 1-30 μ m.Also can form continuous substantially long filament with other method.The method that adopts those skilled in that art to know can make crimped filament.
Substantially continuous bicomponent filament contains at least two kinds of thermoplastic polymers.Preferably, continuous substantially bicomponent filament contains a kind of first polymer and a kind of second polymer that makes long filament have second desired properties that makes long filament have first desired properties.The example of first and second desired properties includes, but not limited to durability and flexibility, durability and wettability, wettability and flexibility, durability and aesthetic property, and other desired combined.Certainly, first polymer can provide one or more desired properties, and second polymer can provide one or more other desired properties.Simultaneously, bicomponent filament also can comprise two or more different polymer, and each polymer provides particular performances.And bicomponent filament can also comprise a kind of particular polymer blend with desired properties, and polymer or the blend polymers different with another kind adjoin.Additive as pigment and hydrophilic modifier, can join in one or both polymer, or be coated on the filament surface.
The example of giving the polymers compositions of bicomponent filament fiber web durability includes, but not limited to polypropylene homopolymer, contain and be no more than about 10% ethene or another kind of C 4-C 20The polypropylene copolymer of alpha-olefin comonomer, high density polyethylene (HDPE), alpha-olefin comonomer content are lower than linear low density of polyethylene, polyamide, polyester, Merlon, polytetrafluoroethylene (PTFE) and other high-tensile meterial of about 10 weight %.In general, when the nonwoven web made from the bicomponent filament that contains first polymer and second polymer, can bear than the similar nonwoven web made from the similar long filament that only contains second polymer and exceed at least about 10%, during preferred at least 30% tensile load, just we can say that first polymer given the bicomponent filament durability.
The example of giving the polymers compositions of bicomponent filament fiber web flexibility and flexibility comprises, but be not limited to, high pressure (branching) low density polyethylene (LDPE), alpha-olefin comonomer content is no more than the linear low density of polyethylene of about 10 weight %, the copolymer of ethene and at least a vinyl monomer (for example, ethylene/vinyl acetate), the copolymer of ethene and unrighted acid (ester derivant that comprises it) and any two kinds of copolymers that contain the alpha-olefin of 2-20 carbon atom, wherein, the 10 weight % that the content of each all surpasses copolymer in two kinds of comonomers (comprise, for example, ethylene-propylene rubber).Can also comprise thermoplastic polyurethane, A-B and A-B-A ' block copolymer, wherein A and A ' they are thermoplasticity tail blocks, B is a kind of elastomeric blocks.In general, when the nonwoven web made from the long filament that contains first polymer and second polymer, than more deflection and/or when having more soft hand feeling of the similar nonwoven web made from the similar long filament that only contains first polymer, just we can say that second polymer given bi-component nonwoven web flexibility and or flexibility.
The example of giving the polymer of thermoplastic nonwoven fiber web wettability includes, but not limited to polyamide, polyvinyl acetate, saponified polyvinyl acetate, saponification ethylene/vinyl acetate and other hydrophilic material.If water at the online contact angle of the non woven fibre made from the bicomponent filament that contains first and second polymer a) less than 90 °, b) be lower than the contact angle of the similar nonwoven web made from the similar long filament that only contains first polymer, then this second polymer just provides wettability to bicomponent filament, and contact angle is measured according to ASTM D724-89.When hydrophilic polymer was used as the fibroreticulate skin of skin/core bicomponent filament, it just gave whole fiber web surperficial wettability.
Certainly, polymer gives that every kind of polymer all has enough amounts in the Capability Requirement long filament of nonwoven bicomponent long filament desired properties.In general, contain the first selected polymer of the 10-90 weight % that has an appointment and the second selected polymer of about 10-90 weight % in the continuous substantially thermoplastic filament.Preferred bicomponent filament comprises each polymer of about 25-75 weight %, more preferably from about each polymer of 40-60 weight %.
Substantially continuous thermoplasticity bicomponent filament and pulp fiber can combine with the method for knowing in this area.For example, can be with a kind of altogether forming process, in the method, at least one melts and sprays a mouthful die head and is installed near the inclined tube, and other material adds by this inclined tube when the fiber web moulding.Forming process existing description in people's such as the United States Patent (USP) 4,818,464 of Lau and Anderson United States Patent (USP) 4,100,324 altogether.Disclosure in the patent is included in that this is for reference.Substantially continuous bicomponent filament and pulp fiber also can combine with hydraulic pressure entanglement or mechanical interlocking method.Described a kind of hydraulic pressure entanglement method in the United States Patent (USP) 3,485,706 of Evans, its disclosure is included in that this is for reference.
Pulp fiber can be any high average fiber length oar dregs of rice, the harmonic(-)mean fibre length oar dregs of rice or their mixture.Preferred pulp fiber comprises cellulose fibre.Term " the high average fiber length oar dregs of rice " is meant the oar dregs of rice that contain a small amount of staple fibre or non-fibrous particle.The fibre length of the high fibre length oar dregs of rice is generally greater than about 1.5mm, preferably about 1.5-6mm, and length is with optics fibre analysis instrument, and the Kajaani test instrument is measured as mentioned above.The source generally comprises non-secondary (original) fiber and the secondary stock oar dregs of rice through screening.The example of the high average fiber length oar dregs of rice comprises the bleaching and the unbleached original cork fibrous oar dregs of rice.
Term " the harmonic(-)mean fibre length oar dregs of rice " is meant the oar dregs of rice that contain a large amount of staple fibres and non-fibrous particle.The average fiber length of the harmonic(-)mean fibre length oar dregs of rice is less than about 1.5mm, preferably about 0.7-1.2mm, and fibre length is measured with optical analyser Kajaani test instrument as mentioned above.The example of the harmonic(-)mean fibre length oar dregs of rice comprises the original hardwood oar dregs of rice, and the secondary stock oar dregs of rice that derive from office's waste paper, newspaper and hardboard fragment etc.
The example of the wooden oar dregs of rice of high average fiber length comprises those that U.S. Alliance Coosa Pines company sells with trade name Longlac 19, Coosa River 56 and Coosa River 57.The harmonic(-)mean fibre length oar dregs of rice can comprise some original hardwood oar dregs of rice and derive from secondary (promptly reclaiming) the fiber oar dregs of rice that comprise newspaper, regeneration hardboard and office's waste paper etc.The mixture of the high average fiber length oar dregs of rice and the harmonic(-)mean fibre length oar dregs of rice can mainly contain the harmonic(-)mean fibre length oar dregs of rice.For example, mixture can contain the high average fiber length oar dregs of rice that surpass about 50 weight % harmonic(-)mean fibre length oar dregs of rice and be less than 50 weight %.A kind of typical mixture contains the have an appointment 75 weight % harmonic(-)mean fibre length oar dregs of rice and the high average fiber length oar of the about 25 weight % dregs of rice.
Pulp fiber can be unpurified, also can be to make oar to different refining degree.Also can add crosslinking agent and/or hydrating agents in the oar dregs of rice mixture.If wish to obtain a kind of very open or loose non-woven pulp fiber net, then can add degumming agent to reduce the hydrogen bond degree.Pennsylvania, the Quaker Oats Chemical company of Conshohocken sells a kind of typical degumming agent, and commodity are called Quaker 2008.Add and attack and occupy composite, for example, the degumming agent of 1-4 weight %, thus the static state that records and the ABRASION RESISTANCE of dynamic friction coefficient high thermoplasticity continuous polymer long filament can be reduced.Degumming agent super fatting agent or anti-friction agent effect.The pulp fiber that comes unstuck can be buied from Weyerhaeuser company, and commodity are called NB 405.
Various improvement and alternative embodiment also can be thought and drop in the scope of the invention.In one embodiment, the bicomponent thermoplastic filament also makes up with other thermoplastic filament except making up with pulp fiber continuously.For example, continuous bicomponent thermoplastic filament can comprise the mixture of bicomponent spunbond long filament and double-component melt-blown long filament.In this embodiment, spun-bonded continuous yarn is given higher intensity, and meltblown filament is more effective aspect absorption and entanglement pulp fiber.
In another embodiment, bicomponent filament can be that spun-bonded fibre and the meltblown fibers (not necessarily bi-component) lower with fusing point mix continuously.Therefore, the composite fiber net can be by making up 3 strands or more bicomponent spunbond filament stream, more low-melting meltblown filament and the pulp fiber of multiply form.When introducing pulp fiber, meltblown filament may be still heat and viscosity, and can with the pulp fiber clinkering to help that this structure is solidified.Generally much smaller than the spun-bonded fibre meltblown microfibers of diameter can play binding agent or adhesive to pulp fiber.
In another embodiment, in bicomponent filament arranged side by side, can make up a kind of elastomeric polymer and a kind of non-elastic polymer to be formed with the basic bicomponent filament continuously of curling test.This continuous substantially crimp bicomponent long filament can be the form of meltblown microfibers, and it is thin and soft, helps to capture and tangle pulp fiber.The bicomponent filament that curls also can be a spun-bonded continuous yarn, and purpose is to increase loftiness and resilience.In nonwoven web, the crimp bicomponent long filament can with or do not use with other thermoplastic filament, purpose is to increase volume, reduces fiber web density.
Be suitable for producing the elasticity of continuous substantially crimp bicomponent long filament and the typical combination of non-elastic material and include, but not limited to following combination:
More flexible polymer More stiff polymer
Styrene-Butadiene Polypropylene
Styrene-Butadiene Polyethylene
Elasticity (single-point or metallocene catalysis) polypropylene Polypropylene or polyethylene
Elasticity (single-point or metallocene catalysis) polyethylene Polyethylene or polypropylene
Polyurethane Polypropylene or polyethylene
Ethylene/vinyl acetate copolymer Polypropylene or polyethylene
EP rubbers Polypropylene or polyethylene
Annotate: 1. except as otherwise noted, polymer is not to use metallocene catalysts.
2. except as otherwise noted, polyacrylic polymer is isotaxy basically.
Except the combination of elasticity and non-elastic polymer, can realize curling with other combination of polymers.For example, but can in continuous substantially bicomponent thermoplastic filament, adopt thermal contraction polymer (polymer that its long filament shrinks when the temperature of post bake below the fusing point peak) and combination that can not the thermal contraction polymer to realize curling.But thermal contraction includes, but not limited to following combination with typical combination that can not the thermal contraction polymer:
More heat-shrinkable polymer Polymer that can not thermal contraction
Polyethylene terephthalate Polyethylene or polypropylene
Polybutylene terephthalate (PBT) Polyethylene or polypropylene
Ethylene/vinyl acetate copolymer Polyethylene or polypropylene
The combination of some other polymer when stretching side by side in continuous substantially bicomponent filament, also can be shunk.These combinations include, but not limited to following combination:
First polymer Second polymer
More low viscous polymer The polymer of viscosity higher
Polypropylene Polyethylene
Polypropylene Atactic polypropylene
Polyethylene Atactic polypropylene
In another extraordinary embodiment, with a certain amount of a kind of super-absorbent material and continuous substantially bi-component filament thermoplastic polymer and pulp fiber combination, to improve the absorbability of absorbent nonwoven web composite.Term " superabsorbents " or " super-absorbent material " are meant a kind of water-swellable but water-fast organic or inorganic material, it is under best condition, in the aqueous solution that contains 0.9 weight % sodium chloride, can absorb about 20 times of its deadweight at least, more preferably at least about 30 times of its deadweight.
Super-absorbent material can be natural, synthetic or modified natural polymers and material.In addition, super-absorbent material can be the organic compound of the inorganic material of silica gel and so on or cross-linked polymer and so on.Term " crosslinked " is meant and can makes the water miscible material of script become any measure water insoluble substantially but swellable effectively.This class measure can comprise, for example, physical entanglement, crystallization microcell, covalent bond, ion complex and associated matter, hydrophilic associations is associated or Fan Dewali as hydrogen bond and hydrophobicity.
The example of synthetic super-absorbent material polymer comprises alkali metal salts or ammonium salt, polyacrylamide, polyvingl ether, maleic anhydride and the vinyl ethers of polyacrylic acid and polymethylacrylic acid and copolymer, PVP, polyvinyl ethers, polyvinyl alcohol and their mixture and the copolymer of alpha-olefin.Other super-absorbent material comprises natural and modified natural polymers, as hydrolyzed acryionitrile grafted starch, acrylic acid grafted starch, methylcellulose, chitosan, carboxymethyl cellulose, hydroxy propyl cellulose and natural gum, as alginates, xanthans, locust bean gum etc.Natural and synthetic wholly or in part super absorbent polymer also can be used for the present invention.Assarsson etc. disclose other absorbability gel rubber materials that are suitable in the United States Patent (USP) of announcing on August 26th, 1,975 3,901,236.The method of the synthetic absorbability gelatin polymer of preparation has been disclosed in the United States Patent (USP) 4,076,633 of authorizing people such as Masuda on February 28th, 1978 and had authorized on August 25th, 1981 in people's such as Tsubakimoto the United States Patent (USP) 4,286,082.
Super-absorbent material can be an xerogel, and it forms aquogel when making moist.But term " aquogel " generally also is used to refer to making moist of super-absorbent polymer materials or does not make moist form.Super-absorbent material can have the long filament and the fiber web of many kinds of forms such as paillon foil, powder, particle, fiber, continuous fibers, network, solution spinning.Particle can have any desired shape, for example, and spiral or semi-spiral shape, cube, bar-shaped, polyhedron shape etc.Also can use needle-like, paillon foil, fiber and their combination.
During use, the amount of super-absorbent material in the absorbent non-woven composite can be for about 5-of absorbent non-woven composite gross weight about 90 weight %.Preferred super-absorbent material accounts for about 10-60 weight % of absorbent nonwoven web composite, more preferably from about 20-50 weight %.Super-absorbent material is generally sold with the particle size of the about 1000 μ m of about 20-.The example of commodity graininess super-absorbent material comprises and is positioned at the Virginia, the product SANWET of the Hoescht Celanese company of Portsmouth IM3900 and SANWET IM-5000P is positioned at the state of Michigan, the product DRYTECH of the Dow Chemical Company of Midland 2035LD and be positioned at Greensborough, the product F AVOR of the Stock-hausen company of N.C 880.An example of fibrous super-absorbent material is the product OASIS that is positioned at the Technical Absorbents company of Britain Grimsby 101.
Super-absorbent material can add with method as hereinbefore, with pulp fiber and the non-woven long filament combination of bi-component continuously.For example, super-absorbent material can be pressed against on the conveyer belt when forming nonwoven web at bicomponent filament, joins in the shaping stream of bicomponent filament with pulp fiber, also can be on a position after, separate to join in the stream that is shaped with the oar dregs of rice.Perhaps, super-absorbent material can join in the nonwoven web with hydraulic pressure entanglement method.
After having made up each component, can the absorbent non-woven composite be bonded together with aforementioned air-flow bonding technology, form the high overall structure of a kind of cohesion.
Absorbent non-woven composite of the present invention can be used for especially comprising the personal care absorbent goods in many absorbent products.The personal care absorbent goods comprise diaper, training pants, swimsuit, absorbent pants, baby wipe handkerchief, adult-incontinence articles, women sanitary articles or the like.The absorbent non-woven composite is particularly useful in diaper, and therein, continuous substantially bicomponent filament provides liquid distribution, flexibility and durability, and the oar dregs of rice and (choosing wantonly) super-absorbent material provide high-caliber absorbability.In one of the absorbent non-woven composite useful embodiment, continuous substantially bicomponent filament is that the arranged side by side or skin/core combination with low-density or linear low density of polyethylene (flexibility is provided) and polypropylene (durability is provided) is made.If with skin/core configuration, then polypropylene should be at in-core, and is one deck low-density or linear low density of polyethylene epidermis on every side.The absorbent non-woven composite also can be used in the absorbability medical product, includes, but not limited to the medical thing of wiping away of mattress, bandage, absorbability curtain and spirituosity and/or other sanitizer.
Embodiment
Make the absorbent non-woven composite with the composition of crimp bicomponent spun-bonded continuous yarn, the oar dregs of rice and super-absorbent material.Be somebody's turn to do the configuration arranged side by side that is configured as of curling bicomponent filament, average dawn number is 1.5.At United States Patent (USP) 5,382, the method described in 400 forms the bicomponent filament that should curl with people such as Pike.Both sides composed as follows, percentage is that benchmark calculates with the long filament gross weight.
A side B side
48.0%Exxon 3445 polypropylene 49.0%Dow61800 linear low density of polyethylene
1%TiO 21.0%Union Carbide DS4DOS copolymer
1%Masil SF-19 internal surfactants
After extruding and quench, long filament adds the voltage (0.0005 ampere) of 24.5KV immediately, to improve the efficient that they absorb the oar dregs of rice and super-absorbent material.Use over against three torches of row and a ground wire of long filament side and apply voltage.Then, before bicomponent filament deposits on the fiber web formation conveyer belt, inject filament stream with the auxiliary composition of air with pulp fiber and super-absorbent material.After being deposited on the conveyer belt, allow non-woven composite stand the air-flow bonding, to improve the caking property between component at 264 °F.
For all composite samples, the used oar dregs of rice all are the CR1654 from Coosa Pines company.Super-absorbent material is the FAVOR from Stockhausen company 880.To prepared sample, estimate saturated capacity and tension test with following method.
Saturated capacity
One 6 inches * 9 inches composite samples are immersed in the middle absorption of saline solution (0.9%) 20 minutes.Then, this sample is placed on 0.5 pound/inch 2Vacuum drying oven in desorb 5 minutes.The saturated capacity of each sample is calculated divided by dry-eye disease weight with the difference of wet example weight and dry-eye disease weight.
Tension test
Tension test is undertaken by INDA bar shaped tension test method IST 110.1-92.3 inches in each sample is wide, replaces 2 inches wide described in the IST 110.1-92.The tension test parameter is as described below:
Crosshead speed: 12 inches/min
Load cells: 100N
Gauge length: 3 inches
Constant speed stretches
Wet test (hereinafter) is used according to the saturated sample of above-mentioned saturated capacity test method(s) and is carried out.Sample in saline solution, soaked 20 minutes and excessive liquid at 0.5 pound/inch 2Vacuum drying oven in desorb 5 minutes.
Table 1 has provided the composition of prepared sample.Embodiment 1 representative is a kind of only to contain the oar dregs of rice and super-absorbent material, and does not contain the control sample of bicomponent filament matrix.Bicomponent filament matrix and pulp fiber have been used in embodiment 2 and 4 representatives, but do not contain super-absorbent material.The oar dregs of rice content of embodiment 2 is 2 times of embodiment 4.Bicomponent filament matrix and pulp fiber and super-absorbent material have been adopted in embodiment 3 and 5 representatives.Compare with embodiment 3, embodiment 5 usefulness less pulp fiber and more super-absorbent material.
Table 1: sample detail
The embodiment sequence number Composite basis gross weight (gsm) Bicomponent fiber basis weight (gsm) Bicomponent fiber content, % Oar dregs of rice basis weight (gsm) Oar dregs of rice content, % Super-absorbent material basis weight (gsm) Super-absorbent material content, % The voltage of being executed on the bicomponent fiber
1 2 3 4 5 550 150 265 108 198 0.0 85 85 85 85 0 57 32 79 43 220 65 100 23 23 40 43 38 21 12 330 0.0 80 0.0 90 60 0 30 0 45 Invalidly whether be not
Table 2 has provided the result of the test of each sample.All tensile properties show that all sample of the present invention is much better than control sample.Sample of the present invention has also kept extraordinary saturated capacity, particularly when having adopted super-absorbent material.
The evaluation of table 2: embodiment
The embodiment sequence number Saturation degree (g/g) Do tensile load (g) Do load/basis weight (g/gsm) Do strain, % Wet tensile load (g) Wet load/basis weight (g/gsm) Wet strain, %
1 2 3 4 5 20.5 10.4 15.4 11.7 15.9 154 2157 1986 3059 1989 0.28 14.38 7.49 28.32 10.05 7 25 22 23 24 0 2665 1706 2793 2458 0 17.77 6.44 25.86 12.41 0 27 32 25 28
Though think that at present embodiment of the present invention as herein described are preferred, but still can do various modifications and improvement and do not depart from spirit of the present invention and scope.Scope of the present invention is shown in the appending claims, and all changes in equivalent meaning and scope all will be included in wherein.

Claims (18)

1. absorbent nonwoven web composite, it comprises:
Many continuous substantially bicomponent filaments comprise a kind of first thermoplastic polymer and a kind of second thermoplastic polymer that are arranged in zones of different on each bicomponent filament cross section; And
Many oar dregs of rice that are included between these basic continuous filament yarns.
2. the absorbent nonwoven web composite of claim 1, wherein, described first and second thermoplastic polymer is with assignment of configuration arranged side by side.
3. the absorbent nonwoven web composite of claim 1, wherein, described first and second thermoplastic polymer is with skin/core assignment of configuration.
4. the absorbent nonwoven web composite of claim 1, wherein, first polymer comprise a kind of more durable, be selected from following one group polymer: polypropylene homopolymer and the copolymer, high density polyethylene (HDPE), the alpha-olefin comonomer content that contain a kind of alpha-olefin comonomer that is no more than 10 weight % are no more than linear low density of polyethylene, polyamide, polyester, Merlon, the polytetrafluoroethylene (PTFE) of 10 weight %, and their composition.
5. the absorbent nonwoven web composite of claim 1, wherein, first thermoplastic polymer provides durability second thermoplastic polymer that flexibility then is provided.
6. the absorbent nonwoven web composite of claim 1, wherein, first thermoplastic polymer provides durability second thermoplastic polymer that wettability then is provided.
7. the absorbent nonwoven web composite of claim 1, wherein, continuous substantially bicomponent filament comprises curling long filament.
8. the absorbent nonwoven web composite of claim 7, wherein, first thermoplastic polymer comprises a kind of polymer of relative resilient, and second thermoplastic polymer then comprises a kind of stiff relatively polymer.
9. the absorbent nonwoven web composite of claim 7, wherein, first thermoplastic polymer comprises a kind of heat-shrinkable relatively polymer, and second thermoplastic polymer then comprises a kind of polymer that relatively can not thermal contraction.
10. the absorbent nonwoven web composite of claim 1, wherein, the described oar dregs of rice comprise the harmonic(-)mean fibre length oar dregs of rice of average fiber length less than 1.5mm.
11. the absorbent nonwoven web composite of claim 1, wherein, the described oar dregs of rice comprise the high average fiber length oar dregs of rice of average fiber length 1.5-6mm.
12. the absorbent nonwoven web composite of claim 1, wherein, the described oar dregs of rice comprise the mixture of a kind of harmonic(-)mean fibre length oar dregs of rice and the high average fiber length oar dregs of rice.
13. the absorbent nonwoven web composite of claim 1, it comprises 5-97 weight % pulp fiber and the continuous substantially bicomponent filament of 3-95 weight %.
14. the absorbent nonwoven web composite of claim 1, it comprises 35-95 weight % pulp fiber and the continuous substantially bicomponent filament of 5-65 weight %.
15. the absorbent nonwoven web composite of claim 1, it comprises 50-95 weight % pulp fiber and the continuous substantially bicomponent filament of 5-50 weight %.
16. the absorbent nonwoven web composite of claim 1, it also comprises a kind of super-absorbent material of 5-90 weight %.
17. the absorbent nonwoven web composite of claim 16, it comprises the super-absorbent material of 10-60 weight %.
18. the absorbent nonwoven web composite of claim 16, it comprises the super-absorbent material of 20-50 weight %.
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CN110272586A (en) * 2019-05-20 2019-09-24 苏州多瑈新材料科技有限公司 The master batch and preparation method thereof of hollow elasticity fiber

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AR021138A1 (en) 2002-06-12
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RU2208673C2 (en) 2003-07-20
CN1342230A (en) 2002-03-27

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