CN100430546C - High stretch recovery non-woven fabric and process for preparing - Google Patents

High stretch recovery non-woven fabric and process for preparing Download PDF

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Publication number
CN100430546C
CN100430546C CNB2003801039278A CN200380103927A CN100430546C CN 100430546 C CN100430546 C CN 100430546C CN B2003801039278 A CNB2003801039278 A CN B2003801039278A CN 200380103927 A CN200380103927 A CN 200380103927A CN 100430546 C CN100430546 C CN 100430546C
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China
Prior art keywords
fiber
supatex fabric
crystallizable polyester
polyester component
bicomponent
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CN1714184A (en
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詹姆斯·E·范特伦普
Y·特尔莫尼亚
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Invista Technologies SARL USA
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Invista Technologies SARL USA
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    • 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
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • 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
    • 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
    • D04H1/06—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 by treatment to produce shrinking, swelling, crimping or curling of fibres
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/50—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by treatment to produce shrinking, swelling, crimping or curling of fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D21H15/10—Composite fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D21H15/06—Long fibres, i.e. fibres exceeding the upper length limit of conventional paper-making fibres; Filaments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/005—Mechanical treatment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/601—Nonwoven fabric has an elastic quality
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/601—Nonwoven fabric has an elastic quality
    • Y10T442/602—Nonwoven fabric comprises an elastic strand or fiber material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/627—Strand or fiber material is specified as non-linear [e.g., crimped, coiled, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/627—Strand or fiber material is specified as non-linear [e.g., crimped, coiled, etc.]
    • Y10T442/629—Composite strand or fiber material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/627—Strand or fiber material is specified as non-linear [e.g., crimped, coiled, etc.]
    • Y10T442/632—A single nonwoven layer comprising non-linear synthetic polymeric strand or fiber material and strand or fiber material not specified as non-linear
    • Y10T442/633—Synthetic polymeric strand or fiber material is of staple length
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/627—Strand or fiber material is specified as non-linear [e.g., crimped, coiled, etc.]
    • Y10T442/635—Synthetic polymeric strand or fiber material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/627—Strand or fiber material is specified as non-linear [e.g., crimped, coiled, etc.]
    • Y10T442/635—Synthetic polymeric strand or fiber material
    • Y10T442/636—Synthetic polymeric strand or fiber material is of staple length
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
    • Y10T442/638—Side-by-side multicomponent strand or fiber material

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The present invention is concerned with a novel non-woven fabric characterized by high stretch recovery and a process for preparing said fabric by employing fibers of latent crimp.

Description

Supatex fabric and manufacture method thereof are replied in high elongation
Technical field
The present invention relates to be the new supatex fabric of feature and adopt potential method of batching the described fabric of fiber production with height elongation answer.
Background technology
The supatex fabric of being made by the thermoplastic synthetic fiber is known technically and is widely used in commercial use, for example, and by the trade name of E.I.Du Pont Company's supply, such as Tyvek
Figure C20038010392700041
And Sontara And so on.
In the supatex fabric field, exploring a kind of high bulk textiles for a long time, as having the product of high extensibility with the combined characteristic of high elongation answer always.This kind fabric is collectively referred to as " elastic nonwovens ".Can adopt several different methods to prepare elastic nonwovens.
A kind of method of producing elastic nonwovens adopts the staple fibre that curls, and wherein the entanglement of crimped fibre provides cohesive force and the answer that needs in the elastic nonwovens.Under some situation of this area, crimped fibre is shaped as felt and utilizes air or (operating) water nozzle reaches interlacing.Under other situation of this area, at first will have the potential straight or straight substantially fibre forming that batches is felt, thereby makes potential batching manifest the structure that creates " tangling certainly " by heating then.Yet technical this kind elastic nonwovens lacks according to the toughness of the product definition of tensile modulus and extension at break and to many weavings and the useful density of industrial use.The toughness of fabric determines its " elasticity " just, in other words the degree that its can be stretched with and the power of replying.The elastic nonwovens of this area is confined to low-density, perhaps uses technical term, has the very high bulk fabric of low elasticity.
People such as Aranaga, Japanese Kokai Heisei 11-158733 disclose a kind of by the wet shop method with potential polyethylene terephthalate of batching/polytrimethylene terephthalate bicomponent fiber shaping supatex fabric.The supatex fabric that obtains allegedly has the high percentage of replying.Should wet shop method comprise water thorn fiber process so that provide enough entanglement before curling manifesting.The supatex fabric of being produced can be characterised in that in the 0.3mm heavy weave and reach 30g/m whereby 2Basic weight.Think that in Aranaga and other document the high crimped fibre of replying has the potentiality that prepare the high value supatex fabric.Yet Aranaga recognizes that clearly challenge is, the fiber with high retraction force has the tendency of curling independently, thereby causes the increase with the fabric bulkiness that is reduced to cost of the formation of tangling.It also usually causes breaking of fabric during the contraction.Consequently be confined to be fit to the high bulk fabric of non-bearing occasion usually, and the potentiality of high recovery characteristic fiber are not fully exerted.
Furukawa, United States Patent (USP) 4,469,540 disclose a kind of supatex fabric of high loft, its bulk density＜0.020g/cm 3, make by curling polyolefin two-component staple fiber.Crimp frequency greater than 4.7 every centimetre (cm) (12 curling per inch) that curl is allegedly unfavorable to the fibre web shaping, because it makes web density too high.According to the structure of Furukawa, it is said, reach " melt-adhesions " and described melt-adhesion by heat bonding, rather than fibre matting, allegedly, be that structure is maintained together primary mechanism.
People such as Stokes, WO 00/18995, discloses a kind ofly to be shaped by the crimp bicomponent polyamide fiber, carries out crosslinked to keep resilience to make the method for compression bulked non-woven fabric subsequently.
People such as Terakawa, EP 0 391 260 B1 disclose a kind of method of being made supatex fabric by continuous bi-component polyamide fiber, the yarn beam that wherein has the potential nascent spinning that batches accepts air-entangled, be heated to and manifest curling temperature, is heated to cause the temperature bonding in the crosspoint again.Supatex fabric according to Terakawa has the 0.030g/cm of being lower than 3Density.People such as Shawver, United States Patent (USP) 5,540,976 disclose a kind of elastic nonwovens, are laminated on the elastomer internal layer sheet material by spunbonded materials and make.
People such as Pike, United States Patent (USP) 5,418,045 discloses a kind of shaping of nonwoven web, with continuous multicomponent thermoplastic fibre, particularly polyolefin with latent crimp is raw material, and makes fiber curl in various degree various in air before being configured as the nonwoven web of heat bonding.
Summary of the invention
The invention provides a kind of supatex fabric, the asymmetric bicomponent fiber of helix-coil that comprises a large amount of entanglement, this fiber comprises the first crystallizable polyester component and the second crystallizable polyester component, the described first crystallizable polyester component shows than the low crystalline rate of the described second crystallizable polyester component, described fiber is characterised in that the fiber number at 0.5～6 dawn, described fiber shows at least 19.7 curl every centimetre (50 curling per inch), curling radius of curvature is equal to or less than 0.2mm, and the wherein said fiber overwhelming majority is tangled each other, and the wherein said fiber also overwhelming majority is orientated in the plane of clearly stipulating, described supatex fabric is characterised in that 0.2～0.4g/cm 3Bulk density.
The present invention also provides the method for shaping supatex fabric, this method comprises and being deposited as by overlapping fibrous planar array having the potential asymmetric bicomponent fiber that batches in a large number, the described fiber overwhelming majority is orientated in its plane, and described planar array is configured between 2 attachment surfaces; Heat described planar array manifesting described potential the batching of at least a portion, condition is, at least a portion between the described period of heating, described nonwoven fabric structure is in during the constraint of described attachment surface contacts.
The accompanying drawing summary
Fig. 1 describes wet fiber felt precursor and the deposition of cloth carrier on the drying drum of Williams pulp experimental rig.
Detailed Description Of The Invention
Technical knownly have potential bicomponent fibre planar array of batching by preparation, is generally fiber mat, thereby heats subsequently to manifest the curling fibre matting that makes, and the result produces a kind of stable nonwoven fabric structure and prepares supatex fabric. Curling manifesting during the step, fiber mat or other structure planar shrink, and are accompanied by expansion along the direction perpendicular to this plane simultaneously. As a result, technical this supatex fabric has quite low bulk density usually, far below 0.1g/cm3 As a result, they are limited in many use value of the field of textiles that high tenacity or high resiliency reply that require.
The present invention is based on following discovery: high curlingly, high reply the formation of tangling between the fiber and can encourage along its expansion perpendicular to the direction on fabric plane during manifesting process curling by careful control fabric. In the method for prior art, curling manifesting causes a large amount of contractions planar usually, follows simultaneously the edge perpendicular to the expansion of the direction on this plane.
In the methods of the invention, in the first step, place the planar array that has the potential asymmetric bicomponent fiber that batches in a large number and form described fiber, the described fiber overwhelming majority is along being orientated in its plane, and wherein most described fibers are in to intersect with at least one other described fiber and contact.In a kind of embodiment preferred, described planar array is known as " fiber mat parison " here, and to point out a kind of nonwoven fabric structure, it also will be accepted second step of the inventive method subsequently and handle, that is, curling manifests step.Curling, to manifest step be curling to manifest by the flat heated array, and planar array is configured between 2 attachment surfaces therebetween, and this attachment surface is along the planar orientation that is roughly parallel to planar array at least.Distance between 2 attachment surfaces is adjusted to, and certain part is at least curled manifest planar array during the step to suffer restraints because of contacting these two attachment surfaces simultaneously along the expansion perpendicular to the direction of plane surface.A kind of compression stress to the array in shrinking is introduced in this kind contact during expansion step.The supatex fabric that is obtained shows than by comparable raw material but do not limit it along perpendicular to higher density of the made supatex fabric of the expansion of the direction of plane surface and more solid physical property.
The bicomponent fiber that is fit to the inventive method is the fiber that comprises two kinds of polymer, preferably belongs to same classification, is present in two continuous phases adjacent one another are, and these two show different contractions mutually, can manifest helix-coil whereby after contraction.These two phases can be arranged in arranged side by side or asymmetric sheath core arrangement mode.It is preferred arranging side by side.Suitable bicomponent fiber includes but not limited to bi-component polyester, bi-component polyamide and bi-component polyolefin.Polyester is preferred.In the copolymer of the polymer of these big class inside is also included within.In the middle of polyester, the kind of preferred bicomponent fiber comprises polyethylene terephthalate (PET)/polytrimethylene terephthalate (PPT), PET/ polybutylene terephthalate (PBT) (PBT) and PPT/PBT, preferred PET/PPT.
Also belong in term " bi-component " scope is the fiber that is known as two compositions sometimes---promptly comprise by different classes of polymer, for example, polyamide and polyester.But biconstitutent fibre is so not preferred.
With regard to the object of the invention, having the potential fiber that batches is such fiber, it has and utilizes two kinds of components to manifest extra endogenous capacity of curling in the difference of shrinking aspect the behavior, typical method be by at least a component is heated to its glass transition temperature with on realize.The potential fiber that batches can () shows and certain curl or do not show any curling.In enforcement of the present invention, potential to batch fiber preferably straight, do not have curling.
The inventor finds, manifesting when curling is to make when implementing under the bound condition of expansion of fabric edge perpendicular to the direction on its plane, for example, fabric is clipped in when implementing between 2 metallic plates that are parallel to the fiber mat parison, its effect is to make fabric that remarkable densification take place, and single fiber will become and tangle all the more to heavens.The result is, is that the fabric of feedstock production is compared with adopting art methods with identical fibre felt parison, and tightr, tough and tensile fabric and improved elongation are replied.
The degree of densification and the performance that may reach will depend on special fiber type of the present invention, and the original bulk density of planar array, the degree that fiber overlaps each other, and the spacing between the attachment surface.Other parameter is the same, the spacing between higher crimp shrinkage, the bigger fiber between overlapping degree, higher initial bulk density and the narrower attachment surface (until fiber no longer slide and curl obviously be suppressed this point till) all reply and interrelate with the supatex fabric product of higher density, higher toughness and higher elongation.
The benefit of the inventive method is quite general, and can be applicable to the preparation of the supatex fabric of any composition basically, as long as have the planar array that the potential bicomponent fiber that batches is used to overlapping fiber.
The fiber of Shi Yonging can be taked continuous or long stapled form in the present invention, and perhaps they can be regular staples.Continuous fibers can be spun into multifilament textile form but preferably with the form of single fiber deposition to make the fiber mat parison.Preferred staple length is 3～25mm, and preferred staple fibre fiber number is every rhizoid of 0.5～6 dawn (dpf).In preferred embodiments, fiber is that the content ratio is 70: 30～30: 70, preferred 60: 40～40: 60 PET and PPT two-component staple fiber.
In a more preferred embodiment, the fiber that the present invention adopts is the PET/PPT two-component staple fiber that does not curl, and has at least 40%, preferred 70～80% potentially batch contraction.PET and PPT are crystallizable polymers.Yet PPT shows the crystalline rate higher than PET.
Preferentially being used for PET/PPT fiber of the present invention can prepare like this: with inherent viscosity (I.V.) is 0.4～0.8, preferred 0.5～0.6 PET melt-flow and I.V. equal 0.8～1.5, preferred 0.9～1.0 PPT melt-flow merges, and the stream thigh that will merge is delivered to the porous spinning filament plate, thus, the stream thigh is with 260～285 ℃, and preferred 265 ℃～270 ℃ temperature is extruded.Extrudate is through collecting, quenching, subsequently without drafting step batch.Spinning speed is 1900～3500m/min, preferred 2000～3000m/min.After the spinning, yarn is cut to 3～25mm, the length of preferred 20～25mm.I.V. according to 25 ℃, in parachlorophenol, measure.
The concrete spinning speed numerical value that those skilled in the art will recognize that the fibre property that requirement is provided will depend on the concrete parameter of polymer, spinning temperature, fibre diameter and the quenching type etc. of concrete selection.Those skilled in the art understand that also the spinning speed scope that is fit to the PET/PPT fiber will be different from the spinning speed scope that is fit to other composition.For example, have now found that for the PET/PBT fiber, opereating specification is about 1700～3200m/min, preferred 1800～3000m/min; For the PPT/PBT fiber, opereating specification is 600～2000m/min, preferred 800～1600m/min.
So the short fiber yarn of preparation subsequently by surfactant according to 0.05g/l, the solids content scope of preferred 0.25g/l～0.75g/l is dispersed in the water.Dispersion stirs but must not cause turbulent flow, thereby obtains fibre blend even, that fully disperse.This fiber dispersion is deposited on the porous substrate subsequently, and unnecessary water is fallen by leaching, and the fiber mat of Huo Deing is being lower than 70 ℃ then, and preferred about 40 ℃ temperature is carried out drying.Preferably, dryly carry out in surperficial blotting it.
The means of other loosen collagen fibre and medium also can adopt.Fiber can utilize the liquid dispersion beyond the water, as long as this liquid is inertia substantially.Perhaps fiber can be dispersed in the gaseous medium, and for example, air is perhaps at supercritical CO 2In.Yet water dispersibility method adopts the technology that is similar to well-known papermaking process, and is the most convenient therefore also preferred.
In a kind of alternate embodiment of the present invention, fiber takes to have the form of the potential continuous multifilament yarn yarn that batches.When adopting this kind continuous filament yarn, must realize that high fiber separates the planar array or the fiber mat precursor that could form suitable the inventive method.What reach that this kind long filament separates is a kind of by way of being to apply electrostatic charge on yarn beam.The multifilament textile bundle that moves is filled static to being enough to make every rhizoid and adjacent filaments keep the current potential that separates, and then, under the situation of so separating, long filament is collected as random nonwoven web.Preferred yarn has the zero twist or curls, and farthest separates so that reach between the long filament.The electric charge of floor level is 30,000 electrostatic units (esu).Charging is to be at long filament to be enough to make them when removing tension force, just has been pushed at them and has accepted to finish under surface and they will just separate after will being configured as planar array thereon the tension force.Long filament can utilize corona discharge, CONTACT WITH FRICTION, a charging or the charging of other suitable method.In one embodiment, the synthetic organic filament that just has been shaped according to the inventive method still be in its more than setting temperature in by they being sent high field realize charging.Be fit to implement of the present inventionly to add that to yarn beam the equipment of electric charge and detailed procedure are described in United States Patent (USP) 3,338, in 992.Thereby the long filament that constitutes the yarn of so handling is put a kind of overlapping style of formation by the shop and is produced a kind of planar array or fiber mat precursor, and wherein the long filament overwhelming majority is along being orientated in its plane.
So the continuous fibers planar array of preparation is sent to the thermal treatment zone with continuous or mode intermittently subsequently, and at this, potential batching displays, so produce supatex fabric of the present invention.Though the technical known method that many heating are arranged, any suitable enforcement method of the present invention all must relate to the expansion of constraint edge perpendicular to the direction on precursor web plane.This kind method will comprise the batch-type method such as the static thermal treatment zone that is clipped between two plates, or the continuous process such as press polish or heated belt.Realize that desired curling method is not strict, as long as it satisfies following condition: at least a portion between the described period of heating, described nonwoven fabric structure is in during the constraint of attachment surface contacts.
Manifest the potential heating of batching of fiber in the nonwoven fabric structure of so preparation, can adopt various method to implement, for example, those skilled in the art can expect fully.Find that in enforcement of the present invention satisfied result can realize by heating under the following conditions: (i) in heated-air circulation oven, surpass 80 ℃, in the hot blast of preferred about 120 ℃ temperature or, (ii) in the water of about 95 ℃ of temperature.In the typical case of the inventive method implemented, curling manifested in several seconds after occurring in pointed heat and being exposed to.Hot-air is preferred heat medium, when the distance between the attachment surface surpasses 2mm.In the enforcement of the inventive method, find, surpass the thick sample of about 2mm with the hot water heating and usually cause breaking of sample.
In another embodiment, the purpose of this invention is to provide a kind of entanglement supatex fabric, it has high tenacity and from height-elongation/low-deflection to height-deflection/controllability of low-elongation range.This reaches by following measure: (i) adopt to have the high potential fiber that batches and (ii) during shrinking according to the thermal induction area of the inventive method as described herein, to retrain the expansion of fabric thickness.The area contraction of curling during manifesting is to curl to manifest the sign of degree.
Supatex fabric of the present invention has the toughness properties of special expectation, as the product defined that is multiplied by its extension at break with initial Young's modulus.When supatex fabric prepared according to the preferred embodiment of the inventive method, the fabric of being produced showed between initial Young's modulus of 1.2～12MPa and the highest 150% extension at break.The preferred embodiment of supatex fabric of the present invention provides, and is 0.20～0.28g/cm in bulk density 3Fabric in, be respectively about 30% and the extension at break of 6MPa to 100% and 1.8MPa and the combination of tensile modulus.
Supatex fabric of the present invention comprises a large amount of entanglement helix-coils bicomponent fiber arranged side by side, comprise the first crystallizable polyester component and the second crystallizable polyester component, the described first crystallizable polyester component shows the crystalline rate that is lower than the described second crystallizable polyester component, described fiber is characterised in that the Denier range of 0.5～6dpf, described fiber shows at least 19.7 curl every centimetre (50 curling per inch), its curling radius of curvature is equal to or less than 0.2mm, and the wherein said fiber overwhelming majority is tangled each other, and also the overwhelming majority is along orientation in the plane of clearly stipulating for wherein said fiber, and described supatex fabric is characterised in that 0.2～0.4g/cm 3Bulk density.
The density of supatex fabric of the present invention is to determine like this: cut the sample of known area, measure its thickness and weight, and calculate its density according to following formula:
Figure C20038010392700101
Supatex fabric of the present invention is easy to compression and has many crosspoints between fiber.Therefore, the accurate mensuration that obtain thickness is a problem so that determine density exactly.Generally speaking, the thickness of object such as film and fabric is to utilize that contact the thickness meter definite technically, on wherein testing sample is placed in fixing cushion block and is connected a certain device that is used to indicate thickness can vertical mobile presser feet between.If section that can vertical mobile presser feet is narrow, then it may slippage between adjacent fiber, thereby the thickness reading on the low side of a mistake is provided.If can apply excessive pressure to tested zone by vertical mobile presser feet, then it can cause the compression of fabric, the thickness reading on the low side that still can make the mistake.
For avoiding these traps, thickness measurement should adopt such thickness meter to carry out, and it can vertical mobile presser feet has diameter, and the circular cross section flat sample contact surface of 0.5cm and the total power that applies are not more than 95g at least.The accuracy of thickness meter should be ± 0.0005cm at least.Though any instrument that satisfies these restrictions all is fit to measure sample thickness of the present invention, has several ready-made qualified commercially available instruments to use.A kind of this quasi-instrument that is fit to thickness measurement of the present invention that it is found that is that (Providence, R1) C21 computer thickness meter have model PT223 contact presser feet to model PT223 Federal, are installed on the model 35B-8-R-1 estrade.The thickness measurement result should represent at least 3 mean values of taking from the reading of sample difference.
Weight is to determine being accurate on the laboratory balance of 0.0001g at least.
Be applicable to that the bicomponent fiber of supatex fabric of the present invention preferably is selected from the bicomponent fiber arranged side by side of PET/PPT, PET/PBT and PPT/PBT fiber.Above all kinds of in, the described first crystallizable polyester composition as listed is at first, and the second crystallizable component comes second.In other words, the slow polymer of crystallization is placed above the other things.Most preferably, described bicomponent fiber is a bi-component PET/PPT fiber arranged side by side.
Preferentially being used for PET/PPT fiber of the present invention can prepare like this: with inherent viscosity (I.V.) is 0.5～1.2, preferred 0.7～0.9 PET melt-flow and I.V. equal 0.8dl/g～1.5dl/g, preferred 0.9～1.0 PPT melt-flow merges, and the stream thigh that will merge is delivered to the porous spinning filament plate, thus, the stream thigh is with 265 ℃～285 ℃, and preferred 265 ℃～270 ℃ temperature is extruded.Extrudate is through collecting, quenching, subsequently without drafting step batch.Coiling speed in this case with the spinning speed synonym, is 2000～3500m/min, preferred 2500～3000m/min.After the spinning, yarn is cut to 3～25mm, the length of preferred 25mm.I.V. 25 ℃, in parachlorophenol, measure.
Subsequently, the fiber of preferred so preparation is processed according to method described above, thereby obtains supatex fabric of the present invention.
Unusual high density of supatex fabric of the present invention and the high power of replying make them very useful in for example fine grained filtration and protection field.Supatex fabric is the desirable candidate material in industrial dedusting field, becomes single one by one stream thigh because the arrangement of their random fiber allows carrier to distribute rapidly mutually.Most supatex fabric are acupuncture, generally are referred to as " Nomex ", have about 0.2g/cm 3Density.Under same density, fabric of the present invention estimates to have remarkable filter efficiency, because it is easy to cause the three-dimensional random arrangement of fiber.The latter promotes the foundation of " dirt bridge " greatly, and this is extremely low-level most important for rapidly the dust transmitance being reduced to.
In another embodiment, be suitable for bicomponent fiber of the present invention, preferably during the lapping of fiber mat precursor with aramid fibre, for example, the Nomex of marketed by dupont
Figure C20038010392700121
Or Kevlar
Figure C20038010392700122
Fiber merges, to improve intensity, heat-resisting and anti-perverse the wearing property of finished product fabric.In this embodiment, aramid staple fiber does not show thermal contraction usually, forms a kind of fiber mat precursor with the mutual blending of suitable enforcement bicomponent fiber of the present invention.During curling the manifesting of carrying out according to the present invention, aramid fibre is twisted and is formed the network of highly reinforcing entangled fiber with the crimp bicomponent fibers mat, thereby aramid fibre closely is combined in the supatex fabric.This kind usually do not relate to the binding agent that uses in the aramid blend process in manufacturing and just can reach in conjunction with not needing not use closely.
Surface modifier and additive are easy to be attached in the supatex fabric of the present invention, so as to providing, for example, antibiotic and fire resistance.Other do not show the potential polymer fiber that batches also can be easily by with the invention process in the bicomponent fiber blending, particularly, make various mixed with fibers together in the aqueous slurry stage of the preferred embodiment of the invention.For example, it is fire-retardant and wear-resisting to improve to consider to add the staple fibre of aromatic polyamides.
Specific embodiments below the present invention will utilize further describes but is not limited thereto.
Example
Below example in the fiber that adopts be a kind of bi-component yarn arranged side by side, make by the PET (Crystar 4415, IV=0.54 ± 0.02) and the PPT (CIDU, IV=1.04 ± 0.03) of 50/50 ratio.Polymer carries out melt spinning by 34-hole spinning plate at 265～270 ℃ according to technical standardization program, adopt extrude the unit and the filament spinning component standard is that technical that preparation bicomponent fiber arranged side by side is used known, be described in people's such as Evans the United States Patent (USP) 3,671,379.
Extrudate was accepted cooling by sending the long cross-flow quench region of 182.9cm (72 inches), and wherein the quench air of room temperature stream is along brushing with the speed of about 10m/min perpendicular to the direction in strand path.Then, tow batches, and without any independent stretching phase, coiling speed is as shown in instantiation.The yarn that obtains is straight, and in other words, it does not show any visible curling.
After the spinning, every kind of yarn batches every 90m again on the little electronic skein reeling machine of diameter 11cm length.Then, every kind of reeled yarn is cut off staple fibre short flannel for stipulating in the instantiation with scissors.5g F-98Prill, a kind of (Mt.Olive, the NJ) surfactant of Xiao Shouing is dissolved in the solution in the 2L water, is poured in the storage tank of the Williams standard pulp experimental rig that is of a size of 28cm * 28cm * 28cm by BASF AG.By adding cold water storage tank is full of.Subsequently, the 6g short flannel slowly is distributed in the pulp machine, then the portable agitator stir about 30s that forms by wide steel plate with holes of aqueous slurry utilization with little spoon.Must very carefully avoid causing turbulent flow, because this will cause flocculation inevitably.Subsequently, water is bled off, thereby on the porous cloth of tank bottom, deposit one deck fiber mat.
Then, cloth and fiber mat are transferred on the sheet drying device, and also (Watertown NY) makes by the Williams machines corporation.The sheet drying device as shown in Figure 1, is made up of porous metals drum 1, is disposing cloth and fiber mat 2 on its not enough half circumference.For felt is fixed on the tram, 3, one 4 of a canvas sheet material is fixed on bulging surface, tegmentum cloth with tighten above the fiber mat 2 and by screwing the knob 5 that is being connected canvas sheet material other end.Manually the rotation knob is to the elasticity that requires, the canvas sheet material be applied on cloth and the fiber mat pressure can one wide, but change in some subjective scope.
Felt carries out drying at 35 ℃～40 ℃.Drying is finished under light pressure, and this pressure is by about 2 circles of rotation knob the canvas that is covered with sheet material to be tightened to obtain.After the 1h drying, take off felt and cut into the sample of 7.62cm * 7.62cm (3 inches square).Subsequently, each sample individually is inserted between the aluminium sheet of 2 16cm * 21cm * 0.7cm coating tetrafluoroethylene the every heavy 554g of plate.Distance between plate and the plate is controlled by inserting the pad of varied in thickness between 0.25～4mm.Subsequently, composite (2 plate+sample+pads) is reinstated 120 ℃ the about 30min of hot air.
All mechanical tests all are to adopt table top Instron tensile test device, and model 1123 is finished.This machine is upgraded with " the MTS update package " that comprise MTS Testworks software 4.0 editions.
Be used for the crimp shrinkage (CC) of the yarn of the inventive method, assess as described below: one section yarn sample of 10.2cm (4 inches) is placed in 120 ℃ the hot-air and heats 30min.Subsequently, form a circle on the hook thereby this yarn sample is suspended in its mid point, its two ends stick with glue band and stick together.To be in and be fixed on the length of yarn that its adhesive tape clings under the 1.5mg/d load at two ends and be labeled as L 1.5, and with the L that puts under the 100mg/d load 100So crimp shrinkage can be calculated as CC (%)=[(L 100-L 1.5)/L 100] * 100.3 samples are averaged obtain the result.
For determining every centimetre of crispation number (per 0.39 inch crispation number), independent yarn samples equally heats according to the crimp shrinkage test.Then, it is clipped between 2 glass plates and adopts stereoscope to rely on overhead illumination under about 16 times multiplication factor, to be observed.Every centimetre of crispation number be by to a paragraph header to the end distance equal on the fiber of 1cm (0.39 inch), the crest number that calculates in fiber axis one side obtains.
Density is to measure 3 inches * 3 inches by the Federeral C21 comparator (comparator) that employing is installed in estrade (model 35B-8-R-1) (7.62cm * 7.62cm) thickness of square sample is determined.Comparator has smooth contact point model PT223, and the total power that applies is 93 ± 2g, 0.18 inch of presser feet diameter (0.46cm).Thickness is 5 mean values at the numerical value of the different parts mensuration of sample.
The weight of cloth specimen adopts Mettler 8200 balances of accuracy 0.0001g to determine.
Before heat treatment, the wet thickness of being made by 1/4 inch short flannel of spreading sheet material of typical case is 0.28 ± 0.02mm.
It is that whole sample is adopted relational expression 100* (A that area shrinks Before-A After)/(A Before) measure A wherein BeforeAnd A AfterBefore representing square sample to shrink and after area.
Example 1:
34 rhizoid 50/50PET/PPT bi-component yarn, filament denier 5.9, according to noted earlier under the speed of 3030m/min spinning make.This yarn beam shows the tensile strength at 1.6g/ dawn.So the yarn of preparation is cut off with scissors and is become 2.54cm (1 inch) short flannel, and adopts method described above in Williams standard pulp experimental rig, processes as heating agent with hot-air.The curl yarn that obtains has following characteristic: crimp shrinkage CC=74%, and every centimetre of crispation number is 22.8 (the per inch crispation number is 58), mean radius of curvature 0.13mm.The characteristic of the cloth of different spacer thicknesses is shown in Table I.Each numerical value all is the mean value of 2 samples.The product of modulus and elongation (being known as toughness) has and approximates 2 constant value.
Table 1
Pad (mm) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/dx.%) Density (g/cm 3)
0.25 0.50 1 2 4 44 58 67 79 84 226 179 350 533 504 0.055 0.045 0.035 0.022 0.014 35 50 70 88 95 1.9 2.2 2.4 1.9 1.4 0.28 0.24 0.23 0.23 0.20
Example 2
Repeat the material and the program of example 1, different is, in being distributed to Williams standard pulp experimental rig before, 2.54cm (1 inch) short flannel is with the solution complete wetting of 1wt% poly(ethylene oxide) (Mw=900,000) in water.The result is stated from Table II.
Table II
Pad (mm) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/dx.%) Density (g/cm 3)
0.25 0.50 1 2 4 48 47 72 79 86 163 180 270 422 552 0.053 0.046 0.029 0.017 0.012 34 44 58 93 120 1.8 2.0 1.7 1.6 1.5 0.26 0.24 0.24 0.22 0.22
Example 3:
Repeat the material and the program of example 1, different is that fiber is cut off becomes 0.64cm (1/4 inch) short flannel.The result is stated from Table III.
Table III
Pad (mm) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/d.%) Density (c21 table) (g/cm 3)
0.25 0.50 1 2 4 49 67 75 81 86 144 204 286 348 546 0.038 0.024 0.022 0.010 0.013 28 48 64 90 82 1.1 1.2 1.4 0.9 1.1 0.24 0.24 0.24 0.21 0.23
Comparative Examples 1:
Repeat the method and the material of example 3, different is, the yarn of every rhizoid of 4.7 dawn is made in yarn spinning under 1850m/min, and tensile strength is about 1.17g/d (gram/dawn).After manifesting its latent crimp according to previously described method, yarn has following properties: crimp shrinkage CC=0.42; Every centimetre of crispation number is 6.7 (the per inch crispation number is 17), and mean radius of curvature is about 1.1mm.The result is stated from Table IV.The length of the short flannel in this example is 0.64cm.
Table IV
Pad (mm) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/d.%) Density (g/cm 3)
0.25 0.50 1 2 4 0 0 8 28 49 68 70 71 92 145 0.10 0.09 0.02 0.007 0.004 3 4 7 19 40 0.3 0.4 0.2 0.2 0.2 0.18 0.19 0.19 0.20 0.19
Comparative Examples 2:
Repeat the material and the program of example 1, different is that short flannel length is 51mm.The result is stated from Table V.
Table V
Pad (mm) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/d.%)
0.50 1 2 4 59 76 82 87 171 260 385 692 0.045 0.017 0.012 0.010 55 85 139 152 2.5 1.5 1.7 1.5
Comparative Examples 3:
This examples show being higher than under 60 ℃ the baking temperature, is carried out heat setting, thereby has been eliminated potential batching under the condition that fiber can not shrink suffering restraints.
Repeat the material and the program of example 3, drying is being carried out under the various different temperatures as shown in Table VI.Yet, being different from example 3, the canvas sheet material that covers fiber mat between dry period is stretched tight very tightly so that fiber mat is exerted pressure and limited moving of fiber, thereby prevents to shrink.The result be about in the 3030m/min spinning, cut into 0.64cm (1/4 inch) short flannel, heat treated yarn in the hot-air that adopts the 2mm pad subsequently.
Table VI
Baking temperature (℃) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/d%)
23 40 60 80 79 82 73 0 364 432 290 64 0.013 0.013 0.017 0.009 84 98 74 41 1.1 1.3 1.3 0.4
Comparative Examples 4
Repeat the material and the program of example 3, just curling manifests the stage and carries out in 95 ℃ of water.The result is stated from Table VII.Sample ruptures in water under the spacer thickness of＞1mm.
Table VII
Pad (mm) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/d.%) Density (g/cm 3)
0.25 0.50 1 2 4 28 40 75 - - 94 125 302 - - 0.027 0.056 0.024 - - 24 22 31 - - 0.6 1.2 0.7 - - 0.27 0.28 0.33 - -
Comparative Examples 5
Identical with Comparative Examples 4, just yarn is in the 1850m/min spinning.The result is stated from Table VIII.
Table VIII
Pad (mm) Area shrinks (%) Superficial density (g/m 2) Modulus (g/d) Elongation under the maximum load (%) Modulus * elongation (g/d.%) Density (g/cm 3)
0.25 0.50 1 2 4 0 0 11 48 76 64 73 76 132 323 0.23 0.038 0.029 0.011 0.011 3 5 9 23 37 0.7 0.2 0.3 0.3 0.4 0.20 0.23 0.20 0.24 0.20

Claims (20)

1. supatex fabric, the asymmetric bicomponent fiber of helix-coil that comprises a large amount of entanglement, this fiber comprises the first crystallizable polyester component and the second crystallizable polyester component, the described first crystallizable polyester component shows than the low crystalline rate of the described second crystallizable polyester component, described fiber is characterised in that the fiber number at 0.5～6 dawn, described fiber shows at least 19.7 and curls every centimetre, curling radius of curvature is equal to or less than 0.2mm, and the wherein said fiber overwhelming majority is tangled each other, and the described fiber overwhelming majority also is orientated in the plane of clearly stipulating, described supatex fabric is characterised in that 0.2～0.4g/cm 3Bulk density.
2. the supatex fabric of claim 1, wherein bicomponent fiber is a bicomponent fiber arranged side by side.
3. the supatex fabric of claim 1, the wherein said first crystallizable polyester component is a polyethylene terephthalate, and the described second crystallizable polyester component is a polytrimethylene terephthalate.
4. the supatex fabric of claim 1, the wherein said first crystallizable polyester component is a polytrimethylene terephthalate, and the described second crystallizable polyester component is a polybutylene terephthalate (PBT).
5. the supatex fabric of claim 1, the wherein said first crystallizable polyester component is a polyethylene terephthalate, and the described second crystallizable polyester component is a polybutylene terephthalate (PBT).
6. the supatex fabric of claim 1, wherein said bicomponent fiber mainly is a staple fibre.
7. the supatex fabric of claim 6, wherein said first crystallizable polyester is a polyethylene terephthalate, and described second crystallizable polyester is a polytrimethylene terephthalate, the content ratio of the two is 70: 30～30: 70.
8. the supatex fabric of claim 7, wherein the content ratio is 60: 40～40: 60.
9. the supatex fabric of claim 1, wherein said bicomponent fiber is continuous.
10. the supatex fabric of claim 1, its feature is that also initial Young's modulus is that 1.2～12MPa and extension at break are up to 150%.
11. supatex fabric, comprise a large amount of 0.5～6 dawn, the length of not curling is the entanglement helix-coil two-component staple fiber arranged side by side of 20～25mm, this fiber comprises polyethylene terephthalate and polytrimethylene terephthalate, the content ratio of the two is 60: 40～40: 60, described fiber shows at least 19.7 and curls every centimetre, curling radius of curvature is equal to or less than 0.2mm, and the wherein said fiber overwhelming majority tangles each other, and wherein said fiber is also most to be orientated in the plane of clearly stipulating, described supatex fabric is characterised in that bulk density is 0.2～0.4g/cm 3, initial Young's modulus is that 1.2～12MPa and extension at break are the highest by 150%.
12. method that forms supatex fabric, this method comprises that the asymmetric bicomponent fiber that will have latent crimp in a large number is configured to the planar array of overlapping fiber, this bicomponent fiber comprises the first crystallizable polyester component and the second crystallizable polyester component, the described fiber overwhelming majority is orientated in its plane, and described planar array is configured between 2 attachment surfaces; Heat described planar array to manifest the described latent crimp of at least a portion, condition is that between the described period of heating, described nonwoven fabric structure contacts with described attachment surface constraint at least a portion.
13. the method for claim 12, wherein said planar array are the forms of fiber mat parison.
14. the method for claim 12, wherein bicomponent fiber is a bicomponent fiber arranged side by side.
15. the method for claim 12, wherein bicomponent fiber mainly is made up of polyester.
16. the method for claim 12, the wherein said first crystallizable polyester component is a polyethylene terephthalate, and the described second crystallizable polyester component is a polytrimethylene terephthalate.
17. the method for claim 12, the wherein said first crystallizable polyester component is a polytrimethylene terephthalate, and the described second crystallizable polyester component is a polybutylene terephthalate (PBT).
18. the method for claim 12, the wherein said first crystallizable polyester component is a polyethylene terephthalate, and the described second crystallizable polyester component is a polybutylene terephthalate (PBT).
19. the method for claim 12 comprises that also by average length be the step that the aqueous slurry of the short flannel of 3～25mm forms the planar array of this fiber.
20. method that forms supatex fabric, this method comprise by latent crimp be punctured into 70～80%, long 20～25mm side by side not the aqueous slurry of crimp bicomponent staple fibre form the fiber mat parison, described fiber mat parison is configured between 2 attachment surfaces; Heat described fiber mat parison to manifest the described latent crimp of at least a portion, condition is that between the described period of heating, described fiber mat parison contacts with described attachment surface constraint at least a portion; Described bicomponent fiber contains polyethylene terephthalate and polytrimethylene terephthalate, and the two content ratio is 60: 40～40: 60.
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BR0315715B8 (en) 2013-02-19
HK1086868A1 (en) 2006-09-29
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EP1567700A1 (en) 2005-08-31
US20040116027A1 (en) 2004-06-17
EP1567700B1 (en) 2007-10-24
CN1714184A (en) 2005-12-28
BR0315715B1 (en) 2013-01-08
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DE60317094D1 (en) 2007-12-06
KR101065094B1 (en) 2011-09-16

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