EP2334852A1 - Fibre superabsorbante à deux composants - Google Patents

Fibre superabsorbante à deux composants

Info

Publication number
EP2334852A1
EP2334852A1 EP09748020A EP09748020A EP2334852A1 EP 2334852 A1 EP2334852 A1 EP 2334852A1 EP 09748020 A EP09748020 A EP 09748020A EP 09748020 A EP09748020 A EP 09748020A EP 2334852 A1 EP2334852 A1 EP 2334852A1
Authority
EP
European Patent Office
Prior art keywords
component
superabsorbent
sap
bicomponent fiber
thermoplastic
Prior art date
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.)
Granted
Application number
EP09748020A
Other languages
German (de)
English (en)
Other versions
EP2334852B1 (fr
Inventor
Kay Bernhard
Jörg Dahringer
Michael Klanert
Werner Stefani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trevira GmbH
Original Assignee
Trevira GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Trevira GmbH filed Critical Trevira GmbH
Publication of EP2334852A1 publication Critical patent/EP2334852A1/fr
Application granted granted Critical
Publication of EP2334852B1 publication Critical patent/EP2334852B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • 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
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1362—Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2927—Rod, strand, filament or fiber including structurally defined particulate matter
    • 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

Definitions

  • the invention relates to a superabsorbent bicomponent fiber, a process for their preparation, superabsorbent textile fabrics produced therefrom and their use, in particular in the hygiene sector and in medicine.
  • DE-A-10232078 describes bicomponent fibers enriched in a superabsorbent polymer (SAP) and their use as nonwovens. These are core-sheath fibers, the core and the sheath-forming matrix being of a thermoplastic polymer, in particular of a polyolefin.
  • the core is SAP-free; the sheath contains a fibrous compound of the thermoplastic polymer with SAP and occupies 10 to 50% of the cross-sectional area of the bicomponent filaments.
  • the coat forming compound contains 5 to 50 wt .-% SAP, which has a mean particle size of 1 to 50 microns.
  • the bicomponent filaments are produced by coextrusion of the two aforementioned polymer blends.
  • a spunbonded fabric can be obtained in one operation.
  • component A comprises at least one thermoplastic polymer
  • component B contains a compound of at least one thermoplastic base polymer and at least one superabsorbent polymer (SAP), characterized in that the melting point of the in component A contained thermoplastics is at least 20 0 C higher than the melting point of the in the Component B contained thermoplastics, the mean grain size of the SAP is 0.5 to 10 microns, and the compound has an SAP content of 0.5 to 40 wt.%.
  • SAP superabsorbent polymer
  • bicomponent fibers is understood to mean bicomponent or multicomponent fibers which have a side-by-side structure or a core-shell structure. According to the invention, bicomponent fibers having a core-shell structure are preferred, the component A being in the core and the component B is contained in the jacket.
  • thermoplastic polymers preferably high-melting thermoplastic polymers (Mp> 100 0 C) are used, which are suitable for fiber production.
  • Suitable polymeric materials include, for example, polyamides such as Polyhexamethylenadipinamid, polycaprolactam, aromatic or partially aromatic polyamides ("aramids"), aliphatic polyamides such as nylon, partially aromatic or wholly aromatic polyester, polyphenylene sulfide (PPS), polymers with ether and keto groups, such as polyether ketones (PEK) and polyetheretherketone (PEEK) or polyolefins, such as polyethylene or polypropylene. Preference is given to melt-spinnable polyesters.
  • polyamides such as Polyhexamethylenadipinamid, polycaprolactam, aromatic or partially aromatic polyamides (“aramids”), aliphatic polyamides such as nylon, partially aromatic or wholly aromatic polyester, polyphenylene sulfide (PPS), polymers with ether and keto groups,
  • Suitable polyester materials are in principle all known types suitable for fiber production.
  • Melt-spinnable polyesters consist predominantly of building blocks derived from aromatic dicarboxylic acids and from aliphatic diols.
  • Common aromatic dicarboxylic acid building blocks are the divalent radicals of benzenedicarboxylic acids, in particular terephthalic acid and isophthalic acid;
  • Common diols have 2 to 4 carbon atoms, with ethylene glycol and / or propane-1, 3-diol are particularly suitable.
  • component A of the bicomponent fiber consists of at least 85 mol% of polyethylene terephthalate (PET) and / or polytrimethylene terephthalate (PTT).
  • PET polyethylene terephthalate
  • PTT polytrimethylene terephthalate
  • the remaining 15 mol% then build up from dicarboxylic acid units and glycol units, which act as so-called modifying agents and which allow the person skilled in the art to influence the physical and chemical properties of the filaments produced in a targeted manner.
  • dicarboxylic acid units are residues of isophthalic acid or of aliphatic dicarboxylic acid such as glutaric acid, adipic acid, sebacic acid;
  • modifying diol radicals are those of longer chain diols, e.g. Example of propanediol or butanediol, of di- or triethylene glycol or, if present in small quantities, of polyglycol having a molecular weight of about 500 to 2000.
  • component A polyesters which contain at least 95 mol% of polyethylene terephthalate (PET), in particular those of unmodified PET.
  • PET polyethylene terephthalate
  • Such polyesters usually have a molecular weight corresponding to an intrinsic viscosity (IV) of 0.4 to 1.4 (dl / g), measured on solutions in dichloroacetic acid at 25 ° C.
  • Suitable thermoplastic base polymers for the component B are polyolefins, preferably polyethylene and / or polypropylene, or copolyesters, wherein the melting point of the thermoplastic contained in the component A by at least 20 0 C higher than the melting point of the thermoplastic contained in the component B.
  • the aforementioned polymers can be used as homo- or copolymers alone and / or in the form of mixtures thereof.
  • polyethylene is used as the base polymer. It is possible to use customary, in particular commercially available, polyethylene types. These include in particular fibers forming linear ethylene polymers such as HDPE, LDPE and / or LLDPE. Such ethylene polymers are described in WO 2004/033771.
  • SAP crosslinked polymers of acrylic acid are referred to, which are capable of a multiple of their own weight up to 1000 times to absorb liquids (eg water or body fluids) to form a gel and also store under pressure can.
  • SAP used according to the invention.
  • the SAP used in the present invention should preferably have sufficient thermal stability with respect to the melt spinning process.
  • the proportion of SAP with a particle size of more than 15 ⁇ m contained therein must not exceed 1% by weight, so that it does not disturb the spinning process.
  • the mean grain size is determined by a laser light scattering method according to ISO 13320-1.
  • a suitable particle size analyzer for example, is a Microtrac S 3500.
  • the milled superabsorbent is compounded into the base polymer of component B via a compounding extruder.
  • this compound can serve both as a masterbatch for component B and as sole raw material.
  • the compound generally has an SAP content of from 0.5 to 40% by weight, preferably from 1 to 35% by weight, particularly preferably from 5 to 30% by weight.
  • components A and B i.e., the above-described composite
  • components A and B are provided and spun by coextrusion into bicomponent filaments.
  • conventional devices are used with appropriate nozzles.
  • the exit velocity at the die exit surface is tuned to the spinning speed to produce a fiber having the desired denier.
  • the coextrusion should preferably be carried out so that the compound (component B) occupies 20-80% of the cross-sectional area of the bicomponent filaments.
  • Spin speed is the speed with which the solidified threads are pulled off.
  • the threads removed in this way can either be fed directly to the drawing or even wound up or stored and drawn at a later time.
  • the conventionally stretched fibers and filaments can then be crimped, fixed and / or stretched to the desired length by generally conventional methods Staple fibers are cut.
  • the single titer of the bicomponent fibers according to the invention in its final form is between 0.9 and 30 dtex, preferably 0.9 to 13 dtex.
  • textile fabric is to be understood in this description in its broadest meaning. These may be all structures containing the fibers according to the invention, which have been produced by a surface-forming technique. Examples of such textile fabrics are woven, scrim, knitted and knitted fabrics, and preferably nonwovens.
  • the nonwoven fabric according to the invention can be constructed from continuous synthetic fibers (filaments) or from staple fibers.
  • superabsorbent bicomponent staple fibers according to the invention are preferably used.
  • the length of the aforementioned staple fibers is generally 1 to 200 mm, preferably 3 to 120 mm, particularly preferably 3 to 60 mm.
  • the textile surface in particular non-woven, may additionally be melt bond-strengthened.
  • carrier and hot melt adhesive fibers are additionally added, which can be derived from any thermoplastic fiber-forming polymers.
  • carrier fibers can also be derived from non-melting filament-forming polymers.
  • meltbond-solidified spunbonded nonwovens are described, for example, in EP-A-0446822 and EP-A-0590629.
  • polymers from which the carrier fibers can be derived are polyacrylonitrile, polyolefins such as polyethylene or polypropylene, substantially aliphatic polyamides such as nylon 6.6, substantially aromatic polyamides (Aramids), such as poly (p-phenylene terephthalate) or copolymers containing a proportion of m-diamine aromatic solubility improving units or poly (m-phenylene isophthalate), substantially aromatic polyesters such as poly (p-hydroxybenzoate) or preferably essentially aliphatic polyesters, such as polyethylene terephthalate.
  • polyacrylonitrile polyolefins such as polyethylene or polypropylene
  • substantially aliphatic polyamides such as nylon 6.6
  • substantially aromatic polyamides Aramids
  • substantially aromatic polyesters such as poly (p-phenylene terephthalate) or copolymers containing a proportion of m-diamine aromatic solubility improving units or poly (m-phenylene isophthalate
  • the proportion of additional carrier and hot melt adhesive fibers to one another can be selected within wide limits, wherein care must be taken that the proportion of the hot melt adhesive fibers is selected so high that the nonwoven fabric obtains sufficient strength for the desired application by bonding the carrier fibers to the hot melt adhesive fibers ,
  • the proportion of the melt adhesive fiber-derived hot melt adhesive in the nonwoven fabric is usually less than 50 wt .-%, based on the weight of the nonwoven fabric.
  • Suitable hot melt adhesives are, in particular, modified polyesters having a melting point which is lowered by 10 to 50 ° C., preferably 30 to 50 ° C., compared with the nonwoven raw material.
  • Examples of such a hot-melt adhesive are polypropylene, polyethylenes, polybutylene terephthalate or polyethylene terephthalate modified by condensing in long-chain diols and / or by isophthalic acid or aliphatic dicarboxylic acids.
  • the textile fabrics produced from the fibers according to the invention can also be subjected to mechanical and / or chemical solidification.
  • the solidification can be carried out by known methods. Without limiting the possible methods, mechanical methods, such as needling, in particular hydrodynamic solidification with a liquid which does not lead to the swelling of the fibers, as well as chemical and / or thermoplastic methods are suitable.
  • the thermal consolidation of the textile fabrics is generally effected by the melt-bonding capacity of the bicomponent fibers according to the invention contained therein.
  • the textile fabric can additionally be solidified by chemical binders, in particular those based on acrylates or styrenes.
  • the textile fabric may be constructed in one or more layers, wherein at least one layer comprises the fibers according to the invention.
  • Nonwoven fabrics made from the bicomponent fibers of the present invention have the advantage of combining the mechanical stability and melt adhesion of a bicomponent staple fiber with the water absorbency of superabsorbent polymers.
  • the nonwovens produced from the bicomponent fibers according to the invention can be used advantageously for applications in the hygiene sector and in medicine due to their high content of SAP and the associated ability to absorb liquid. In addition, they can also be used for specialty food packaging, as leakage protection for liquid packaging and in technical areas where moisture must be avoided.
  • Bicomponent fibers with a degree of filling of 10 to 35 wt.%, In which the compound (component B) occupies 20-80% of the cross-sectional area of the bicomponent filaments, the mean grain size (D 90 ) of the SAP 1 to 10 ⁇ m and the length of the staple fibers 3 is up to 60 mm, are preferred according to the invention.
  • superabsorbent FAVOR 4000 from Evonik is ground in a fluidized bed counter-jet mill to a particle size of d90 ⁇ 10 ⁇ m, determined by laser light scattering using a Microtrac S 3500 measuring device in accordance with ISO 13320-1.
  • the milled superabsorbent is compounded via a compounding extruder in LLDPE as a sheath polymer at 30% by weight.
  • the spun goods is collected as a fiber cable via an inlet rake and tempered by a first septet, consisting of seven rotating rollers, fed on a second septet and re-prepared with the ester oil.
  • the stretching takes place on the sixth or seventh roll of this septet or between this and a further septet running faster by the factor of stretching. Subsequently, the fiber is crimped in a stuffer box, fixed in the oven at 100 0 C or dried and cut to a length of 6 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Multicomponent Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Packages (AREA)
  • Artificial Filaments (AREA)
  • Wrappers (AREA)

Abstract

L'invention concerne une fibre superabsorbante à deux composants, le composant A contenant au moins un polymère thermoplastique et le composant B un composé à base d'au moins un polymère de base thermoplastique et d'au moins un polymère superabsorbant (SAP), ainsi que son procédé de fabrication. Le point de fusion du thermoplastique contenu dans le composant A est au moins de 20° C supérieur au point de fusion du thermoplastique contenu dans le composant B, la taille moyenne de particule du SAP est de 0,5 à 10 µm et le composé présente un pourcentage en SAP de 0,5 à 40% en poids. Des structures textiles planes superabsorbantes qui sont utilisées notamment dans le domaine de l'hygiène et de la médecine peuvent être fabriquées à partir des fibres à deux composants de l'invention.
EP09748020.6A 2008-10-11 2009-10-06 Fibre superabsorbante à deux composants Active EP2334852B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810051430 DE102008051430A1 (de) 2008-10-11 2008-10-11 Superabsorbierende Bikomponentenfaser
PCT/EP2009/007160 WO2010040500A1 (fr) 2008-10-11 2009-10-06 Fibre superabsorbante à deux composants

Publications (2)

Publication Number Publication Date
EP2334852A1 true EP2334852A1 (fr) 2011-06-22
EP2334852B1 EP2334852B1 (fr) 2016-03-30

Family

ID=41565918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09748020.6A Active EP2334852B1 (fr) 2008-10-11 2009-10-06 Fibre superabsorbante à deux composants

Country Status (6)

Country Link
US (1) US20110195214A1 (fr)
EP (1) EP2334852B1 (fr)
JP (2) JP5882057B2 (fr)
DE (2) DE102008051430A1 (fr)
DK (1) DK2334852T3 (fr)
WO (1) WO2010040500A1 (fr)

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EP2711754A1 (fr) * 2012-09-20 2014-03-26 Draka Comteq B.V. Élément gonflable dans l'eau pour câbles à fibres optiques
RU2647386C1 (ru) * 2014-04-01 2018-03-15 Кордса Глобал Эндустриел Иплик Ве Корд Бези Санайи Ве Тиджарет Аноним Ширкети Система для промышленного производства пряжи из композиционного полиэтиленнафталатного материала
CN107227495A (zh) * 2017-05-27 2017-10-03 四川双龙实业有限公司 一种高效涤纶原料的制备工艺
JP7158840B2 (ja) * 2017-10-24 2022-10-24 ロレアル ターゲットゾーンに塗布された配合物の移動を制限する機能を有するシート状の基材、およびそれを使用して製造されたシート状の化粧製品
CN111058108B (zh) * 2019-12-24 2022-05-10 江苏恒力化纤股份有限公司 用于针织的自卷曲弹性混纤丝及其制备方法

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Also Published As

Publication number Publication date
DE202008017741U1 (de) 2010-05-12
EP2334852B1 (fr) 2016-03-30
JP5882057B2 (ja) 2016-03-09
JP2015028235A (ja) 2015-02-12
WO2010040500A1 (fr) 2010-04-15
JP2012505317A (ja) 2012-03-01
US20110195214A1 (en) 2011-08-11
DK2334852T3 (en) 2016-05-17
DE102008051430A1 (de) 2010-04-15

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