EP3682052A1 - Fibre polymère ayant une meilleure aptitude à la dispersion à long terme - Google Patents

Fibre polymère ayant une meilleure aptitude à la dispersion à long terme

Info

Publication number
EP3682052A1
EP3682052A1 EP18779222.1A EP18779222A EP3682052A1 EP 3682052 A1 EP3682052 A1 EP 3682052A1 EP 18779222 A EP18779222 A EP 18779222A EP 3682052 A1 EP3682052 A1 EP 3682052A1
Authority
EP
European Patent Office
Prior art keywords
copolymer
cellulose
polymer fiber
mol
polymer
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.)
Pending
Application number
EP18779222.1A
Other languages
German (de)
English (en)
Inventor
Jörg Dahringer
Michael Klanert
Peter Engelhardt
Antonio Notarnicola
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.)
INDORAMA VENTURES FIBERS GERMANY 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 EP3682052A1 publication Critical patent/EP3682052A1/fr
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/05—Cellulose or derivatives thereof
    • D06M15/09—Cellulose ethers
    • 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
    • D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/05—Cellulose or derivatives thereof
    • D06M15/07—Cellulose esters
    • 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
    • D21H13/02—Synthetic cellulose fibres
    • D21H13/04—Cellulose ethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/32—Polyesters

Definitions

  • the invention relates to a polymer fiber with improved long-term dispersibility, a process for their preparation, and their use.
  • Polymer fiber i. Fibers based on synthetic polymers are industrially produced on a large scale.
  • the underlying synthetic polymer is produced by a melt spinning process. This is the
  • the spinneret usually has a multi-bore spinneret plate from which the individual capillaries (filaments) of the fiber are extruded.
  • wet or solvent spinning processes are also used for the production of staple fibers.
  • a highly viscous solution of a synthetic polymer through nozzles with fine
  • the polymer fibers have good dispersibility in aqueous systems, e.g. in the production of wet laid nonwovens.
  • Drawing and / or crimping is usually carried out by applying suitable coatings or sizes, which are applied to the surface of the finished or to be treated polymer fiber.
  • Another possibility of the chemical modification can be carried out on the polymer backbone itself, for example by incorporation of flame retardant compounds in the main and / or side polymer chain.
  • additives such as antistatic agents or colored pigments, may be incorporated into the molten thermoplastic polymer or incorporated into the polymer fiber during the multi-digit spinning process.
  • the dispersing behavior of a polymer fiber is partly determined by the nature of the influenced by synthetic polymers. In particular with fibers made of thermoplastic polymer, the dispersibility in aqueous systems is therefore influenced and adjusted by the applied to the surface Aviagen or finishing.
  • Dispersibility in particular long-term dispersibility, provide that has good dispersibility even after prolonged storage and also for food contact according to EU Reg. 231/2012 is approved.
  • the polymer fiber should also be used under extreme conditions, i. high pressure, high shear forces and elevated temperature, especially in aggressive aqueous systems, which may have a pH of ⁇ 7 and / or
  • Electrolytes especially on a saline basis, have good dispersibility and this good dispersibility persist even after prolonged storage.
  • the polymer fiber according to the invention comprising at least one synthetic polymer, preferably at least one synthetic thermoplastic polymer, characterized in that the fiber has on the surface a preparation comprising at least one cellulose ether selected from the group carboxymethyl cellulose (CMC),
  • CMC carboxymethyl cellulose
  • Methylcellulose MC
  • EC ethylcellulose
  • HEC hydroxyethylcellulose
  • HPC Hydroxypropyl cellulose
  • MEC methyl ethyl cellulose
  • HEMC Hydroxyethylmethylcellulose
  • HPMC hydroxypropylmethylcellulose
  • Forming dispersion medium is preferably thermoplastic
  • thermoplastic polycondensates particularly preferably so-called synthetic biopolymers, particularly preferably to
  • thermoplastic polycondensates based on so-called biopolymers.
  • thermoplastic polymer in the present invention refers to a plastic which can be (thermoplastic) deformed in a certain temperature range, preferably in the range from 25 ° C. to 350 ° C. This process is reversible, that is to say it can be cooled and reheating to the molten state are repeated as often as long as not through
  • thermoplastic polymers differ from the thermosets and
  • thermoplastic polymer is preferably understood as meaning the following polymers:
  • Polyestercarbonate polyaryletherketone, polyetheretherketone, polyetherimide, Polyether ketone, polyethylene oxide, polyaryl ether sulfone, polyethylene terephthalate, polyimide, polyisobutylene, polyisocyanurate, polyimidesulfone, polymethacrylimide, polymethacrylate, poly-4-methylpentene-1, polyacetal, polypropylene,
  • Polyphenylene oxide polypropylene oxide, polyphenylene sulfide, polyphenylene sulfone, polystyrene, polysulfone, polytetrafluoroethylene, polyurethane, polyvinyl acetate,
  • Polyvinylidene fluoride polyvinyl fluoride, polyvinyl methyl ether, polyvinylpyrrolidone, styrene-butadiene copolymer, styrene-isoprene copolymer, styrene-maleic anhydride copolymer, styrene-maleic anhydride-butadiene copolymer, styrene-methylnethacrylate copolymer, styrene-methylstyrene copolymer, styrene-acrylonitrile Copolymer, vinyl chloride-ethylene copolymer, vinyl chloride-methacrylate copolymer, vinyl chloride-maleic anhydride copolymer, vinyl chloride-maleimide copolymer, vinyl chloride-methyl methacrylate copolymer, vinyl chloride-octyl acrylate copolymer, vinyl chloride-vinyl acetate copolymer,
  • thermoplastic polymer is preferably understood as meaning a polymer which differs chemically and / or physically from the cellulose ethers used in the preparation.
  • the filament-forming thermoplastic polymers do not comprise any one of the following thermoplastic polymers.
  • the filament-forming thermoplastic polymers do not comprise any one of the following thermoplastic polymers.
  • thermoplastic polymers Mp> 100 ° C
  • staple fibers Particularly suitable are high-melting thermoplastic polymers (Mp> 100 ° C) used, which are very well suited in the production of staple fibers.
  • Suitable refractory thermoplastic polymers include i.a. for example, polyamides, e.g. Polyhexamethylene adipamide, polycaprolactam, aromatic or partially aromatic polyamides ("aramids"), aliphatic polyamides, e.g. Nylon, partially aromatic or wholly aromatic polyesters, polyphenylene sulfide (PPS), polymers having ether and keto groups, e.g. Polyether ketones (PEK) and
  • PEEK Polyetheretherketone
  • polyolefins e.g. Polyethylene
  • melt-spinnable polyesters are particularly preferred.
  • 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.
  • polyesters which are at least 95 mol%
  • PET Polyethylene terephthalate
  • polyesters especially polyethylene terephthalates, 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.
  • IV intrinsic viscosity
  • synthetic biopolymer in the present invention refers to a material which consists of biogenic raw materials (renewable raw materials), thus distinguishing it from the conventional, petroleum-based materials or plastics, such as, for example, polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC).
  • PE polyethylene
  • PP polypropylene
  • PVC polyvinyl chloride
  • thermoplastic polycondensates based on so-called biopolymers, these include repeating units of lactic acid, hydroxybutyric acid and / or glycolic acid, preferably lactic acid and / or glycolic acid, in particular lactic acid.
  • Polylactic acids are particularly preferred.
  • polylactic acid polymers derived from
  • Lactic acid units are constructed. Such polylactic acids are usually prepared by condensation of lactic acids, but are also obtained in the ring-opening polymerization of lactides under suitable conditions.
  • Polylactic acids particularly useful in the present invention include poly (glycolide-co-L-lactide), poly (L-lactide), poly (L-lactide-co-s-caprolactone), poly (L-lactide-co-glycolide), poly (L lactide-co-D, L-lactide), poly (D, L-lactide-co-glycolide) and poly (dioxanone).
  • Such polymers are available, for example, from Boehringer Ingelheim Pharma KG (Germany) under the trade names Resomer® GL 903, Resomer® L 206 S, Resomer® L 207 S, Resomer® L 209 S, Resomer® L 210, Resomer® L 210 S Resomer® LC 703 S, Resomer® LG 824 S, Resomer® LG 855 S, Resomer® LG 857 S, Resomer® LR 704 S, Resomer® LR 706 S, Resomer® LR 708, Resomer® LR 927 S, Resomer® RG 509 S and Resomer® X 206 S commercially available.
  • particularly advantageous polylactic acids are in particular poly-D, poly-L or poly-D, L-lactic acids. In a particularly preferred embodiment, it is in the
  • thermoplastic polycondensate based on lactic acids
  • the polylactic acids used in the invention have a number average molecular weight (Mn), preferably determined by
  • the weight-average molecular weight (Mw) of preferred lactic acid polymers is preferably in the range from 750 g / mol to 5,000,000 g / mol, preferably in the range from 5,000 g / mol to 1,000,000 g / mol, more preferably in the range from 10,000 g / mol to 500,000 g / mol, in particular in the range from 30,000 g / mol to 500,000 g / mol, and the polydispersity of these polymers is favorably in the range of 1.5 to 5.
  • the inherent viscosity of particularly suitable, lactic acid polymers, in particular poly-D, poly-L or poly-D, L-lactic acids, measured in chloroform at 25 ° C, 0.1% polymer concentration, is in the range of 0.5 dl / g to 8.0 dl / g, preferably in the range of 0.8 dl / g to 7.0 dl / g, in particular in the range of 1, 5 dl / g to 3.2 dl / g.
  • Hexafluoro-2-propanol at 30 ° C, 0.1% polymer concentration in the range of 1, 0 dl / g to 2.6 dl / g, in particular in the range of 1, 3 dl / g to 2.3 dl / g ,
  • polymers in particular thermoplastic polymers, with a glass transition temperature greater than 20 ° C., advantageously greater than 25 ° C., preferably greater than 30 ° C., particularly preferably greater than 35 ° C., in particular greater than 40 ° C., are extremely advantageous.
  • the glass transition temperature of the polymer is in the range of 35 ° C to 55 ° C,
  • polymers are particularly suitable which have a melting temperature greater
  • the glass transition temperature and the melting temperature of the polymer are preferably at least 60 ° C, preferably greater than 150 ° C, more preferably in the range of 160 ° C to 210 ° C, in particular in the range of 175 ° C to 195 ° C.
  • the glass transition temperature and the melting temperature of the polymer are preferably at least 60 ° C, preferably greater than 150 ° C, more preferably in the range of 160 ° C to 210 ° C, in particular in the range of 175 ° C to 195 ° C.
  • DSC measurement under nitrogen on a Mettler-Toledo DSC 30S The calibration is preferably carried out with indium.
  • the measurements are preferably carried out under dry, oxygen-free nitrogen (flow rate:
  • the sample weight is preferably chosen between 15 mg and 20 mg.
  • the samples are first from 0 ° C to preferably a temperature above the melting temperature of the
  • heated polymer then cooled to 0 ° C and heated a second time from 0 ° C to said temperature at a heating rate of 10 ° C / min.
  • thermoplastic polymers are polyesters, in particular lactic acid polymers.
  • the polymer fiber of the invention may be used as a finite fiber, e.g. as a so-called staple fiber, or as an infinite fiber (filament).
  • a finite fiber e.g. as a so-called staple fiber
  • an infinite fiber filament
  • the fiber is preferably present as a staple fiber.
  • the length of the aforementioned staple fibers is not fundamentally limited, but is generally 1 to 200 mm, preferably 2 to 120 mm, particularly preferably 2 to 60 mm.
  • short fibers can be cut well from the fibers according to the invention. This is understood to mean fiber lengths of 5 mm and less, in particular 4 mm and less.
  • the individual denier of the polymer fiber according to the invention is between 0.3 and 30 dtex, preferably 0.5 to 13 dtex.
  • the polymer fibers according to the invention are preferably made from thermoplastic polymers, in particular thermoplastic organic polymers, particularly preferably from thermoplastic organic polycondensates
  • the polymer material is melted in an extruder and processed by means of spinnerets to the polymer fibers.
  • the polymer fibers according to the invention usually do not comprise fibers which have been prepared by spinning from solution, in particular by means of electrospinning.
  • the polymer fiber can also be present as a bicomponent fiber, the fiber consisting of a component A (core) and a component B (shell).
  • the melting point of the thermoplastic polymer in component A may be at least 5 ° C., preferably at least 10 ° C., more preferably at least 20 ° C., higher than the melting point of the thermoplastic polymer in component B. Melting point of the thermoplastic polymer in component A at least 100 ° C, preferably at least 140 ° C, more preferably at least 150 ° C.
  • thermoplastic polymers used in the bicomponent fiber are the polymers already mentioned above.
  • the polymer fiber according to the invention has on the surface between 0.1 and 20% by weight, preferably 0.5 to 3% by weight, of a preparation which comprises at least one cellulose ether selected from the group carboxymethylcellulose (CMC), methylcellulose (MC) , Ethylcellulose (EC), hydroxyethylcellulose (HEC),
  • CMC carboxymethylcellulose
  • MC methylcellulose
  • EMC Ethylcellulose
  • HEC hydroxyethylcellulose
  • HPC Hydroxypropyl cellulose
  • MEC methyl ethyl cellulose
  • HEMC Hydroxyethylmethylcellulose
  • HPMC hydroxypropylmethylcellulose
  • Ethylhydroxyethylcellulose carboxymethylhydroxyethylcellulose, and mixtures thereof.
  • the preparation comprises at least two cellulose ethers selected from the group of carboxymethylcellulose (CMC),
  • Methylcellulose MC
  • EC ethylcellulose
  • HEC hydroxyethylcellulose
  • HPC Hydroxypropyl cellulose
  • MEC methyl ethyl cellulose
  • HEMC Hydroxyethylmethylcellulose
  • HPMC hydroxypropylmethylcellulose
  • ethylhydroxyethylcellulose carboxymethylhydroxyethylcellulose, especially Preference is given to preparation of methylcellulose (MC) and
  • HPMC Hydroxypropylmethylcellulose
  • the preparation according to the invention covers min. 99% of the total surface area of the fiber, preferably min. 99.5%, in particular min. 99.9%, more preferably 100% of the total surface area of the fiber.
  • the coverage of the surface is determined by microscopic methods.
  • the preparation according to the invention is preferably applied exclusively to the fiber and not subsequently to the textile fabrics produced from the fibers.
  • the preparation according to the invention usually has a thickness of 5 to 10 nm on the fiber.
  • the thickness is determined by microscopic methods.
  • the cellulose ethers used in accordance with the invention are substances which are classified in accordance with EU Reg. 231/2012 are approved as additives. Such substances are commercially available, for example under the name VIVAPUR® or Methocel TM.
  • the preparation comprises cellulose ethers, but in particular carboxymethylcellulose (CMC), methylcellulose (MC),
  • Ethylcellulose (EC), hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), methylethylcellulose (MEC), hydroxyethylmethylcellulose (HEMC),
  • HPMC Hydroxypropylmethylcellulose
  • ethylhydroxyethylcellulose ethylhydroxyethylcellulose
  • Carboxymethylhydroxyethylcellulose particularly preferred are preparation of methylcellulose (MC) and hydroxypropylmethylcellulose (HPMC) containing a
  • Gelling temperature in the range 35 ° C to 90 ° C preferably in the range 40 ° C to 70 ° C, in particular in the range 45 ° C to 60 ° C, particularly preferably in the range 45 ° C to 55 ° C.
  • the cellulose ethers used according to the invention usually have a degree of substitution (number of substituted hydroxy groups per molecule of glucose) in the range from 1.3 to 2.6, preferably from 1.6 to 2.0.
  • the degree of substitution is usually determined by gas chromatography.
  • the cellulose ethers used according to the invention preferably have a methoxy group content of from 26% to 33%, in particular from 27% to 32%.
  • the hydroxypropylcelluloses used according to the invention preferably have a hydroxypropyl group content of max. 5% up.
  • the hydroxypropylcelluloses used according to the invention preferably have a hydroxypropyl group content of 7% to 12%.
  • the cellulose ethers used according to the invention preferably have a methoxy group content of 26% to 33%, in particular of 27% to 32%, and a hydroxypropyl group content of max. 5% up.
  • the cellulose ethers used according to the invention preferably have a methoxy group content of from 26% to 33%, in particular from 27% to 32%, and a hydroxypropyl group content of from 7% to 12%.
  • the cellulose ethers used according to the invention usually have an average molecular weight Mn between 10,000 and 380,000 g / mol, preferably between 10,000 and 200,000 g / mol, in particular between 10,000 and 100,000 g / mol, particularly preferably between 12,000 and 60,000 g / mol preferably between 12,000 and 40,000 g / mol, on.
  • the average molecular weight Mn is usually determined by gel permeation chromatography (GPC).
  • the cellulose ethers used according to the invention usually have a degree of polymerization of from 50 to 1000.
  • the cellulose ethers used according to the invention usually have a viscosity of 10 to 40 mPas, measured as 2% by weight solution in demineralized water (VE water according to DIN standard EN50272-2: 2001) at 20 ° C. (30 seconds after activation of the Solution (resting phase) is measured over a further 30 seconds and one thus obtains the measured value after one minute), for example by means of Brookfield LVT.
  • the preparation according to the invention is usually applied as an aqueous preparation, the solids content of cellulose ether (s) being from 0.1 to 5.0 g / l.
  • the aqueous preparation may contain other ingredients, such as defoamers, etc.
  • the inventively equipped polymer fibers show a very good
  • the polymer fibers according to the invention very quickly and remain dispersed over a longer period of time, on the other hand, the polymer fibers according to the invention also exhibit a good storage stability, i. Even after storage of the fibers prepared according to the invention for at least 1 month (at room temperature of 25 ° C. and a relative humidity in the range from 20 to 70%), the fibers can be well dispersed and are distributed very uniformly as dispersed fibers.
  • the polymer fibers of the invention are also suitable for stabilizing aqueous dispersions in which, in addition to the fibers according to the invention, there are additionally solid, particulate particles, for example mineral particles.
  • polymer fibers according to the invention having a titer between 0.3 and 3 dtex and a fiber length of ⁇ 10 mm, in particular ⁇ 8 mm, particularly preferably ⁇ 6 mm, particularly preferably ⁇ 4 mm are suitable.
  • the polymer fibers of the present invention also stabilize aqueous dispersions with other polymer fibers that do not have the inventive finish.
  • the other polymer fibers may be different or even identical with respect to the fiber-forming polymers, these other polymer fibers not having equipment according to the invention.
  • the fibers of the invention can be used well in the production of wet-laid fabrics.
  • Equipped polymer fibers can be made in the pulper or sheet former.
  • polymer fibers according to the invention having a titer between 0.3 and 3 dtex and a fiber length of ⁇ 10 mm, in particular ⁇ 8 mm, particularly preferably ⁇ 6 mm, particularly preferably ⁇ 4 mm are suitable.
  • the preparation of the synthetic polymer fiber according to the invention is carried out by conventional methods. First, the synthetic polymer is dried, if necessary, and fed to an extruder. Then the melted
  • Spinning speed is adjusted so that a fiber is produced with the desired titer.
  • 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 stretched in a conventional manner fibers and filaments can then according to the usual
  • the fiber can be uncrimped as well as crimped, with the crimped version, the crimping for the wet-laying process must be set (low crimping).
  • the fibers formed may have round, oval and other suitable cross-sections or other shapes, such as dumbbell, kidney-shaped, triangular or tri- or multilobal cross-sections. Also hollow fibers are possible.
  • fibers of two or more polymers can be used.
  • the fiber filaments produced in this way are combined into yarns and these in turn become spun cables.
  • the tow cables are initially stored in cans for further processing.
  • the intermediate stored in the cans spin cords are recorded and produced a large spider cable.
  • the large spun fiber cables usually these 10-600 ktex, can be drawn on a strip line using conventional methods, preferably at a feed rate of 10 to 110 m / min.
  • the draw ratios are preferably from 1.25 to 4, more preferably from 2.5 to 3.5.
  • the temperature during the stretching is in the range of
  • Glass transition temperature of the tow to be stretched is for example between 40 ° C and 80 ° C in polyester.
  • the stretching can be carried out in one stage or alternatively using a two-stage drawing process (see, for example, US Pat. No. 3,816,486). Before and during hiding can be done using conventional
  • Fibers can be applied to conventional methods of mechanical crimping with known crimping machines. Preferred is a mechanical apparatus for fiber crimping with steam assist, such as a stuffer box. However, fibers crimped by other methods may also be used, e.g. also three-dimensionally-curled fibers. to
  • the cable is first tempered to a temperature in the range of 50 ° to 100 ° C., preferably 70 ° to 85 ° C., more preferably to about 78 ° C., and the pressure of the cable entry rollers of 1, 0 to 6, 0 bar, more preferably at about 2.0 bar, a pressure in the Crimping chamber from 0.5 to 6.0 bar, more preferably 1, 5-3.0 bar, with steam at between 1, 0 and 2.0 kg / min., Particularly preferably 1, 5 kg / min., Treated.
  • the application of the preparation according to the invention is carried out after drawing and a second time before the crimping machine insofar as a crimping takes place.
  • the preparation according to the invention is usually heated and in a
  • Applied application temperature in the range of 30 to 1 10 ° C on the fiber and dried. It has been found that the drying of the preparation according to the invention and all post-treatment of the fibers equipped with the preparation according to the invention are carried out at a maximum temperature of 120 ° C., since higher temperatures adversely affect the dispersibility of the fiber. At temperatures of maximum 120 ° C, very homogeneous and uniform preparation jobs are obtained and almost no deposits are observed. For the dispersibility according to the invention such an application is advantageous.
  • crimped fibers are added, followed by cutting and optionally hardening and depositing in pressed bales as a flake.
  • present invention are preferably cut on a relaxation downstream mechanical cutting device.
  • cable types can be dispensed with the cutting. These cable types are placed in uncut form in the bale and pressed.
  • the fibers produced according to the invention have in the crimped
  • Embodiment prefers a degree of crimping of at least 2, preferably at least 3 crimps (crimps) per cm, preferably 3 sheets per cm to 9.8 sheets per cm, and more preferably 3.9 sheets per cm to 8.9 sheets per cm.
  • crimps crimps
  • Crimp degree of about 5 to 5.5 sheets per cm particularly preferred.
  • the crimp degree be set individually.
  • Entry speeds, crimping / texturing, etc. depend on the particular polymer. These are parameters which the skilled person selects in the usual range.
  • the polymer fiber according to the invention also exhibits good pumpability of the dispersed fiber in water, so that the polymer fiber according to the invention is suitable for the production of textile fibers
  • Sheets according to the wet-laying method is particularly well suited. Since the fibers according to the invention promote the dispersibility of solid, particulate particles, for example mineral particles, it is also possible to produce textile fabrics with a mineral finish. For this
  • Embodiments are polymer fibers according to the invention having a titer between 0.3 and 3 dtex and a fiber length of ⁇ 10 mm, in particular ⁇ 8 mm, particularly preferably ⁇ 6 mm, particularly preferably ⁇ 4 mm.
  • melt-blowing processes for example as described in "Complete Textile Glossary, Celanese Acetate LLC, from the year 2000 or in” Chemiefaser-Lexikon, Robert Bauer, 10th Edition, 1993.
  • melt-blowing processes are also suitable.
  • Such melt-blowing processes are useful in the production of fine denier fiber, e.g. for applications in the hygiene sector.
  • textile fabric is thus to be understood in the context of this description in its broadest sense. 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 nonwovens, in particular wet laid nonwovens, preferably based on staple fibers or webs produced by the melt-blown process.
  • the fibers according to the invention have a very good dispersibility.
  • the fibers of the invention show a reduced fiber fly, which causes an improvement in occupational safety, since the preparation provides for a significantly increased hold in the fiber composite.
  • the reduced fiber fly is especially in the formation of fabrics, e.g. Nonwovens, of great importance.
  • the textile fabrics produced by means of the fibers according to the invention are, in particular, wet-laid textile fabrics, in particular wet-laid nonwovens.
  • the fabrics produced by means of the fibers according to the invention contain the polymer fibers according to the invention, on whose surface between 0.1 and 20 wt .-%, preferably 0.5 to 3 wt .-%, of a preparation is applied, the at least one cellulose ether selected from group
  • Carboxymethylcellulose CMC
  • methylcellulose MC
  • ethylcellulose EC
  • HEC Hydroxyethylcellulose
  • HPC hydroxypropylcellulose
  • MEC methylethylcellulose
  • HEMC hydroxyethylmethylcellulose
  • the proportion of polymer fibers according to the invention in the textile fabric is usually at least 10% by weight, based on the total weight of the textile fabric, preferably at least 20% by weight, in particular at least 30% by weight, particularly preferably at least 50% by weight.
  • the textile fabric consists exclusively of the polymer fibers according to the invention.
  • the fibers according to the invention are cut to a length of 2 to 12 mm.
  • VE demineralised water
  • the amount of fibers is 0.25g per liter of deionized water. For better evaluation, 1 g of fibers and 4 liters of deionized water are usually used.
  • the dispersing behavior of the fiber is evaluated as follows:
  • the determination of the gelling temperature is carried out by means of a oscillation rheometer Model Physica MCR 301 of the company of Anton Paar.
  • Methylcellulose solution is applied to melt-spun PLA fibers during processing at the strip mill and then dried.
  • the produced PLA fibers thus have on the surface a preparation comprising at least one methylcellulose (MC).
  • the produced PLA fibers have min. 99% of the total surface of the fiber on the preparation of the invention.
  • the PLA fibers of the present invention are cut to a cut length of 6mm and 1 gram of the cut PLA fibers are added
  • the fibers according to the invention show a significantly better long-term dispersion, as well as a clearly better permanence of the dispersibility after a few weeks of storage.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Multicomponent Fibers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne une fibre polymère ayant une meilleure aptitude à la dispersion, un procédé de fabrication de ladite fibre, ainsi que son utilisation. La fibre polymère selon l'invention comprend au moins un polymère synthétique et une préparation présente sur la surface des fibres et comprenant au moins un éther de cellulose choisi dans le groupe constitué par la carboxyméthylcellulose (CMC), la méthylcellulose (MC), l'éthylcellulose (EC), l'hydroxyéthylcellulose (HEC), l'hydroxypropylcellulose (HPC), la méthyléthylcellulose (MEC), l'hydroxyéthylméthylcellulose (HEMC), l'hydroxypropylméthylcellulose (HPMC), l'éthylhydroxyéthylcellulose, la carboxyméthylhydroxyéthylcellulose, ainsi que des mélanges de celles-ci. La fibre polymère selon l'invention possède une meilleure aptitude à la dispersion et convient donc à la production de suspensions aqueuses qui sont utilisées par exemple dans la formation de surfaces textiles, par exemple de non-tissés.
EP18779222.1A 2017-09-14 2018-09-12 Fibre polymère ayant une meilleure aptitude à la dispersion à long terme Pending EP3682052A1 (fr)

Applications Claiming Priority (2)

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DE102017008637.0A DE102017008637A1 (de) 2017-09-14 2017-09-14 Polymerfaser mit verbesserter Langzeit-Dispergierbarkeit
PCT/EP2018/074633 WO2019053074A1 (fr) 2017-09-14 2018-09-12 Fibre polymère ayant une meilleure aptitude à la dispersion à long terme

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EP (1) EP3682052A1 (fr)
JP (2) JP7234217B2 (fr)
KR (1) KR102435385B1 (fr)
CN (1) CN111094647A (fr)
BR (1) BR112020004538B1 (fr)
CA (1) CA3075545C (fr)
DE (1) DE102017008637A1 (fr)
MX (1) MX2020002597A (fr)
WO (1) WO2019053074A1 (fr)
ZA (1) ZA202001101B (fr)

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JP7807918B2 (ja) * 2018-12-27 2026-01-28 アルベマール コーポレーション 臭素化難燃剤及びこれを含有するポリウレタン
KR102492611B1 (ko) * 2021-11-15 2023-01-31 세명대학교 산학협력단 자기치유 섬유고상캡슐 제조방법

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CA3075545A1 (fr) 2019-03-21
JP2023036910A (ja) 2023-03-14
MX2020002597A (es) 2020-07-20
CN111094647A (zh) 2020-05-01
KR20200054225A (ko) 2020-05-19
US20240392497A1 (en) 2024-11-28
KR102435385B1 (ko) 2022-08-23
ZA202001101B (en) 2021-07-28
US20200277728A1 (en) 2020-09-03
CA3075545C (fr) 2023-10-24
JP2020536178A (ja) 2020-12-10
JP7234217B2 (ja) 2023-03-07
DE102017008637A1 (de) 2019-03-14
JP7459223B2 (ja) 2024-04-01
BR112020004538A2 (pt) 2020-09-08
WO2019053074A1 (fr) 2019-03-21
BR112020004538B1 (pt) 2024-02-27

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