WO2006042904A1 - Fibres antistatiques - Google Patents

Fibres antistatiques Download PDF

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Publication number
WO2006042904A1
WO2006042904A1 PCT/FI2005/000454 FI2005000454W WO2006042904A1 WO 2006042904 A1 WO2006042904 A1 WO 2006042904A1 FI 2005000454 W FI2005000454 W FI 2005000454W WO 2006042904 A1 WO2006042904 A1 WO 2006042904A1
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WO
WIPO (PCT)
Prior art keywords
fiber
core
polymer
ions
mass
Prior art date
Application number
PCT/FI2005/000454
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English (en)
Inventor
Jyri Nieminen
Original Assignee
Ionphase Oy
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 Ionphase Oy filed Critical Ionphase Oy
Publication of WO2006042904A1 publication Critical patent/WO2006042904A1/fr

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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
    • 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
    • D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent

Definitions

  • the present invention relates to fiber materials.
  • the invention especially relates to a non- chargeable or weakly chargeable fiber structure according to the preamble of Claim 1, which structure is suitable for the use in for example clothes, filters, woven textiles, non-woven textiles, carpets as well as an admixture among other fibres.
  • a fiber structure of two or more layers of this kind comprises generally a core layer consisting of a polymer, which is at least partly electrically conductive or has antistatic properties, as well as a first electrically non-conductive polymer layer surrounding the core layer and composing the fiber sheath.
  • the invention also concerns a method according to the preamble of Claim 21 for manufacturing non-chargeable or weakly chargeable fibres.
  • the polymer fibres charge among other things triboelectrically which causes problems in many applications. For instance, tens of kilovolts of static charges accumulate in fitted carpets because of rubbing, or artificial fiber clothes glue to the skin because of static charge. It is known that electronic components and anesthetic gases in hospitals are sensitive to static electric discharges, which can damage the components or set the gases on fire.
  • the third conventional way to produce dissipative fibres is to introduce conductive particles into the inner structure of the fiber.
  • the surface of a bicomponent fiber having a sheath-core-structure consists totally or partly of a polymer, into which conductive particles have been mixed.
  • a polymer into which conductive particles have been mixed.
  • conductive particles finely divided graphite has for example been used.
  • the purpose of the present invention is to eliminate the drawbacks of the state of the art disclosed above and to create an entirely new type of solution for producing bi- and multilayered non-chargeable and weakly chargeable fibres.
  • synthetic PET, PP, PA and PE fibres did not charge triboelectrically when there was an ion conductive polymer as a part of the thin core in the fiber.
  • the structure according to the invention is a bi- and multicomponent fiber structure, wherein most preferably less than 50 % of the cross section surface area of the fiber is an ion conductive polymer blend.
  • the rest of the surface area consists of a principal raw material, such as PET, PP, PA, PE or another thermoplastic defibrated polymer or a mixture thereof.
  • the fibres are manufactured, for example, by using a monofilament technique, using melt processable polymer mixtures or pure polymers forming the core and sheath layers.
  • the core layer is manufactured from polymer blend, which by blending with each other 90 - 10 parts by weight of copolymer formed of olefin and unsaturated carboxyl acid and/or carboxyl acid anhydride, 10 - 90 parts by weight of block polyether and alkali metal compound, the amount of which corresponds to 0.05 - 50 millimols alkali metal ions / I g of polymer blend.
  • the fiber structure according to the invention is principally characterized by what is stated in the characterizing part of Claim 1.
  • the invention provides considerable advantages.
  • a completely antistatic polymer fiber can be produced without reducing the mechanical properties of the fiber, because the electrically conductive core layer can be made rather narrow, whereby it won't affect the strength of the fiber.
  • the strength of the fiber can even be improved by means of the present invention.
  • the cross section surface area of the core part of the fiber is approx. 50 % or less, most suitably at most 30 %, of the total cross section surface area of the fiber. This reduces the wearing of the ionically conductive polymer and, consequently, the price of the product.
  • the typical diameter of the core part of the fiber is 0.1 - 10 micrometers.
  • the ionically conductive polymers can in the form of a fiber be colorless or even translucent / transparent, whereby bright or semi-bright fibres suitable for different fabric applications can be produced in accordance with the invention.
  • a multicomponent fiber according to the present invention charges, e.g., triboelectrically little or not at all. Its charge decay time is exceptionally short, typically less than 3 s or even less than 2 s (determined according to Standard IEC 61340-5-1), although the surface resistivity is the same or essentially the same as the surface resistivity of the surface material.
  • the stretching of said fiber structure does not affect its accumulation of charge.
  • the fiber according to the present invention differs also from known fibres in that it withstands even 100 washings without any changes of its electrical properties.
  • Fiber structures according to the present invention can be produced cost-effectively and they can be produced by conventional methods for producing fibres.
  • the product according to the invention is a bi- or multicomponent fiber with a sheath-core, side-by-side or islands-in-sea structure and having all the other properties of a basic polymer fiber, but which does not charge triboelectrically.
  • the fiber structure is most preferably a core-sheath-structure, wherein a thermoplastic principal raw material composes the sheath layer.
  • the sheath may comprise one or several layers consisting of an electrically non-conductive polymer.
  • the core layer comprises for its part an ionically conductive polymer. Its volume resistivity is most suitably 10 4 ⁇ /sq - 10 12 ⁇ /sq, preferably at most approx. 5 x 10 9 ⁇ /sq.
  • a "non-chargeable or weakly chargeable" fiber structure such as a multilayer fiber, is obtained as a result having the same or essentially (e.g.
  • the same surface resistivity as the surface material for instance for polyethylene 10 14 ohm/sq, although it has a short charge decay time, typically at most 20 s, e.g. at most 10 s, particularly at most 3 s, preferably at most 2 s.
  • the "non-chargeable or weakly chargeable” fiber structure is a structure with a charge decay time (determined according to Standard IEC 61340-5-1) of at most 120 s, most suitably at most 15 s, preferably at most 3 s (especially preferably even less than 0.1 s).
  • the sheath layer is composed of a conventional thermoplastic polymer, such as polyamide, polyester, polyester amide, polyvinyl, polyolefin, acrylic polymer or polyurethane or a mixture thereof. It is also possible to use polycarbonates, polyoximethylene, polyphenylene sulfide, polyphenylene oxide and polystyrene compounds, as well as mixtures of said polymers.
  • Polyolefins, polyamides and polyesters are especially suitable for melt spinning.
  • thermoplasts are the principal components in the fiber structure, that is their part is usually over 50 mass % of the fibres.
  • the part of the thermoplasts of the fiber is at least 55 mass %, most suitably at least 60 mass %, preferably at least 70 mass % and especially preferably at least 80 mass %.
  • the ionically conductive component's part of the mass is correspondingly less than 50 %, typically at most 45 %, most suitably at most 40, preferably at most 30 % and particularly at most 20 mass %.
  • polyolefins are especially polypropylene (PP), polyisobutylene, polybut-1-ene, poly-4-methylpent-l-ene, polyisoprene, polybuthadiene, polycyclopentene, norbornene, as well as the polyethylenes (PE), high density polyethylene (HDPE), high molar mass polyethylene (HDPE-HMW), high density and ultra high molar mass polyethylene (HDPE- UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylenes (LLDPE), (VLDPE) and (ULDPE).
  • the polyesters are also easily melt processable, whereby polyethylene terephthalate, polybuthylene terephthalate as well as their compounds are particularly suitable. Also liquide crystal plastic polyesters and polyester amides may be used.
  • monoolefin and diolefm copolymers as well as their monomers and copolymers formed by other vinylmonomers, such as ethel/propylene copolymers, linear low density polyethylene
  • LLDPE low density polyethylene
  • propylene/but-1-ene copolymers propylene/isobutene copolymers, ethylene/but-1-ene copolymers, ethylene/hexene copolymers, ethylene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octene copolymers, propylene/butadiene copolymers, isobutene/isoprene copolymers, ethylene/alkyl acrylate copolymers, ethylene/alkyl methacrylate copolymers, ethylene/vinyl acetate copolymers and their copolymers with carbon monoxide or ethylene/acrylic acid copolymers and their salts (ionomers), as well as ethylene and propylene terpolymers formed with other unsaturated monomers, such as with diene.
  • LDPE low density polyethylene
  • propylene/but-1-ene copolymers
  • diene-based comonomers of terpolymers can be mentioned hexadiene, dicyclopentadiene and ethylidene-norbornene as well as mutual mixtures of these copolymers and mixtures with the above mentioned polymers, e.g., mixtures of polypropylene/ethylene- propylene copolymers, LDPE/ethylene-vinyl acetate copolymers (EVA), LDPE/ethylene- acrylic acid copolymers (EAA), LLDPE/EVA, LLDPE/EAA as well as various or random- polyalkylene/carbon monoxide copolymers and mixtures formed by their mixtures including other polymers, such as polyamides (PA 6 or 6.6 or 11 or 12 or 6/6.6 -copolymers including OPA), polyethylene terephthalate (PET including OPET), polyethylene aphthalate (PEN), ethylene vinyl alcohol (EvOH), polyproene (including OPP), ethylene acrylic acid copo
  • the core layer contains one or several ionically conductive polymers capable of transporting charges, or it is composed of mixtures of charge transporting polymers or charge non- transporting polymers.
  • the volume resistivity of the ionically conductive layer is typically within the range of approx. 10 4 ⁇ /sq - 10 12 ⁇ /sq, preferably approx. 10 5 ⁇ /sq - 10 9 ⁇ /sq, the volume resistivity being especially preferably at most approx. 5 x 10 9 ⁇ /sq. Therefore, it is according to the present invention "electrically conductive", which concept covers all of the above presented conductivity areas.
  • ions are dissolved into the dissipative polymer as charge carriers.
  • the ions can be anions, cations or mixtures thereof.
  • the electrical conductivity already increases the concentration, which is 0.1 milllimols ions/gram polymer blend, whereby the accumulation of charge of the film hereby decreases. It is possible to use some ions even over 15 mmol/gram, when the ionically conductive polymer is stable enough.
  • the dissipative polymer used in the present invention can be of its structure, e.g., polyether amide, polyetherester or polyether urethane or a mixture thereof.
  • the polymers including a polyether block are especially preferred.
  • the polyethter block is most suitably amorphous (non-crystalline).
  • the molar mass (M w ) of the polyether block is preferably approx. 300 - 3000.
  • the polyether block can for instance be polyethene oxide or polypropylene oxide (in general polyalkylene oxide) or their copolymer.
  • the " alkylene" -group contains most suitably 2 - 6 carbon atoms. Its part of the polymer is in general approx. 30 - 85 mass %, typically approx. 40 - 80 mass %.
  • polyether block copolyester polyetherester amide
  • polyether block copolyamide polyether block copolyamide
  • segmented polyether urethane especially preferred polymers are polyether block copolyester, polyetherester amide, polyether block copolyamide and segmented polyether urethane.
  • the polyamide component may for example be PA- 12 or PA-6, and the polyester component is typically polyethylene terephthalate.
  • polymers suitable for the invention and containing polyether include Atochem's Pebax, Ciba's Irgastat, Du Pont's Hytrel, Nippon Zeon's Hydrin, Noveon's Stat- rite, Sanyo Chemical's Pelestat and IPE of IonPhasE Oy.
  • the fiber structure according to the present invention becomes non-chargeable or at most weakly chargeable if the core contains at least approx. 6 mass %, preferably at least 10 mass % poly ether blocks of the layer weight.
  • the ionically conductive layer contains polyether in an amount of 6 - 25 mass % of the total mass.
  • the ionically conductive core contains most suitably carboxylic acid or carboxylase in an amount of 0.1 - 10 mass % of the total mass of the polymer.
  • Such a material can also contain ionomers, as described below. These may contribute to melt processing and improve mechanical properties of the fibres.
  • Dissolvable cations according to the present invention are monovalent alkali metal ions, earth alkali metal ions, transition metal ions, mono-, di-, and trisubstituted imidazoles, substituted pyridium ions, substituted pyrrolidinium ions, tetraalkyl phosphoniums.
  • Anions according to the invention are alkyl sulfate and alkyl sulphonate, tosylate ion, triphlate ion, [CF 3 CO 2 ]-, amide- and imide ions, bis(trifluorosulfon)imide, bis(toluenesulfon)imide, perchlorate ion.
  • Monovalent, alkali metal ions are especially preferred. Lithium, sodium, potassium, rubidium and cesium are used as such or in combination with, e.g., earth alkali metal ions.
  • the electrically conductive polymer contains at least 0.05 mmol, in particular at least 0.1 mmol/g dissolved anions or monovalent cations.
  • monovalent metal cations at least 0.05 mmol, most suitably at least 0.2 mmol, particularly at least 1 mmol, preferably 1.5 - 20 mmol/g polymer (however, see below).
  • the number of the other monovalent cations can according to the size of the ion and its physical properties (e.g., difmsibility / movement) vary in general in the range of 0.1 - 50 mmol/g polymer.
  • the ions to be added are chosen according to the requirements of the end product to be produced of the fiber, taking the production conditions into account.
  • the conductivity of the ionically conductive polymer can be improved by including therein organic micromolecular compounds capable of dissolving ions, whereby they improve the movement of the ions as well as prevent the crystallization of the polyether blocks.
  • the concentrations of these kinds of organic dissolvents are at least 0.1 mass % of the ionically conductive polymer or of a mixture thereof, the concentration being preferably approx. 0.2 — 5 mass %. It has been found that an addition of already 1 mass % may decrease the resistivity by one decade.
  • suitable compounds are ethylene carbonate, propylene carbonate and diethyl carbonate.
  • a suitable ionically conductive polymer component is an electrically conductive polymer blend comprising a mixture made up of at least two polymers, whereby the first polymer component of the blend comprises an ionomer and the second polymer component of the blend is a block polyether polymer.
  • the ionomer consists most suitably of a copolymer made up of an olefin, such as ethylene and/or propylene, and an unsaturated carboxylic acid and/or carboxylic acid anhydride, the copolymer being ionically crosslinked.
  • the block polyether polymer consists in particular of a polyether block and a polyamide, polyester or polyurethane block.
  • the acid groups of the ionomer are at least partly ionized with cations.
  • the polyether blocks of the block polymer are at least partly in the form of a salt.
  • the cations cause a crosslinking of the ionomers and a coordination of the block polymers, whereby the strength of the polymer blend increases considerably at the same time as ionic bonds are formed, and as the alkali cations are coordinated to the ethers, the electrical conductivity of the blend increases significantly.
  • the ionic bond according to the invention is also thermally reversible.
  • the number of the acid groups or the acid anhydride groups of the ionomer is typically approx. 0.1 - 15 molar % of the ionomer.
  • the cations are preferably derived from alkali metals, preferable alkali metals including lithium, sodium, potassium, rubidium and cesium, and mixtures thereof.
  • the alkali metal is present in an amount of approx. 0.05 - 50.0 millimols/gram, preferably approx. 0.1 - 20 millimols/gram, especially preferably approx. 1.5 - 15 millimols/gram (that is mol/kg) of the polymer blend. With the polymer a high electrical conductivity and excellent mechanical properties are simultaneously obtained.
  • the described blends can be prepared by mutually mixing 90 - 10 parts by weight of a copolymer formed of an olefin and an unsaturated carboxylic acid and/or a carboxylic acid anhydride, 10 - 90 parts by weight of a block polyether as well as an alkali metal compound, the amount of which corresponds to 0.05 - 50 millimols of the alkali metal ion / 1 g of the polymer blend.
  • the mixing is carried out at an elevated temperature, preferably in a molten state, and it is continued until the alkali metal compound has substantially completely reacted with the polymer components of the mixture, whereafter the obtained polymer blend can be processed to a fiber with a diameter of approx. 0.01 - 100 micrometers, particularly 0.1 - 50 micrometers (see also below).
  • the core includes ionically conducting polymer, which consists of a blend of two polymers, whereby the first polymer component of the blend is an ionomer and the other polymer component is a block polyether polymer, wherein the content of polyether blocks in the core can be in particular at least 6 mass %.
  • the sheath is most preferably formed of electrically non-conductive polymer, whereby, however, the charge decay time of the fiber is less than 10 s as determined according to standard IEC 61340-5-1 and the surface resistivity is the same or essentially the same as the surface resistivity of the material of the sheath.
  • the fiber core further be a blend component, such as one of the thermoplastic polymers mentioned above, which is suitable for the use in the sheath layer.
  • a blend component such as one of the thermoplastic polymers mentioned above, which is suitable for the use in the sheath layer.
  • the core can be connected to this layer without any use of separate glue polymers (tielayer).
  • the amount of thermoplast in the blend forming the polymer material of the core is at least 10 mass %, particularly at least 25 mass %, and especially preferably approx. 40 - 60 mass %.
  • a glue polymer may also be used, such as an olefin plastomer or a terpolymer (Lotader) made up of ethylene, acrylic acid ester and maleic acid or a copolyethylene grafted with a maleic acid anhydride.
  • a glue polymer such as an olefin plastomer or a terpolymer (Lotader) made up of ethylene, acrylic acid ester and maleic acid or a copolyethylene grafted with a maleic acid anhydride.
  • a glue polymer there are 2 or more layers. Typically there are at most 20 layers, most suitably 2 - 7 layers. Of these layers all except the one of the core may consist of electrically non-conductive layers. However, it is, if desired, possible to produce a fiber structure with a plurality of ionically electrically conductive layers.
  • the layer forming the surface of the structure is at least partly, most suitably mainly or even totally electrically non-conductive.
  • the structure of the bi- or multiconiponent fiber according to the present invention can be of a so called “sheath-core", “side-by-side” or “islands-in-sea” type, whereby the electrically conductive core layer is preferably totally placed inside the sheath layer (sheath-core -solution).
  • a structure which comprises a core composed of an electrically conductive polymer, whereby the core is surrounded of an thermoplastic sheath part and comprises at least a polymer material, which is ionically conductive, and whereby the volume resistivity of the core is 5x10 9 ohm/sq or less, and the charge decay time of the layer structure is less than 10 s.
  • the ionically conductive polymer material comprises as a conductive polymer component a polyetherester amide containing a polyether block, a polyether block copolymer or a segmented polyether urethane, and as the principal component of the fiber composing at least 50 mass %, preferably at least 75 mass % of the fiber is polyamide, polyester or polyolefin or a mixture thereof.
  • Polypropylene is especially preferable of the polyolef ⁇ ns and polyethylene terephthalate of the polyesters.
  • the fibres according to the invention can per se be produced using known methods, as disclosed for example in the book written by Viljo Tammel "Polymeeritiede ja muoviteknologia", Part III, Otatieto 1989, page 370, the contents of which are incorporated into the present application by reference.
  • monofilaments are produced by means of extrusion by pressing molten plastic coming from an extrusion presser through a nozzle with a plurality of small holes and by introducing these into a water basin, where the monofilaments are cooled down with cooling water.
  • the temperature is typically below the boiling point of water, for example approx. 40 - 90 0 C. From the water basin the monofilaments are lead to an orientation unit.
  • fibres can be produced, in which the conducting core layer is manufactured from polymer blend, which is manufactured by blending with each other 90 - 10 parts by weight of copolymer formed of olefin and unsaturated carboxyl acid and/or carboxyl acid anhydride, 10 - 90 parts by weight of block polyether and alkali metal compound, the amount of which corresponds to 0.05 - 50 millimols of alkali metal ions / I g of polymer blend.
  • Conventional non-conducting polymers amounting typically to 1 - 60 mass % of the polymer blend can be added to the polymer blend before the extrusion stage.
  • the yarns are hereafter oriented to increase their strength.
  • the most usual way to carry out the orientation is to lead the yarns via godet rolls to a hot air oven, at one end of which the speed of the godet rolls is faster.
  • orientation By means of orientation the tensile strength of the fiber can be increased 2-...10-folds.
  • the fiber can be postprocessed, e.g., by bringing to its surface avivage agents or similar agents, wherewith the surface properties of the fiber can be processed, for instance in order to make it easier to form it into desired fabrics and tissues.
  • the ionnomer-based blend used in the preferable application of the invention improves the orientation of fibres.
  • the thickness of the final stretched monofilament is 1 - 50 denier, or even over 1 mm.
  • the thickness of the fiber is in general approx. 1 - 1000 denier, preferably approx. 10 - 150 denier.
  • the cross section surface area of the fiber less than 50 % consist of a conductive core, whose diameter is typically at most 30 %, or even at most 20 % of the diameter of the fiber.
  • the cross section of the core is thus in general approx. 0.01 - 100 micrometers, particularly approx. 0.1 - 50 micrometers, e.g. approx. 1 -20 micrometers, typically approx. 1 — 10 micrometers.
  • the diameter of the cross section of the core containing a polymer is at least 1 micrometer, but at most 20 %, preferably at most approx. 10 % of the diameter of the cross section of the entire fiber.
  • Fibres according to the invention can be used for instance in artificial fibrous textiles and fabrics. They are suitable for example in clothes, filters, woven textiles, non-woven textiles, carpets as well as an admixture among other fibres.
  • the filters and sporting clothes form especially interesting applications.
  • Their part of the fiber blends e.g. polypropylene or polyester fibres
  • An ion conductive polymer blend A was produced by means of a double-screw extruder.
  • the blend consisted of 50 mass % ethylene/butyl acrylate/methacrylic acid terpolymers (BA 4 mass %, MAA 2 mass %), and 50 mass % polyethylene oxide and polyamide block copolymers (PA 50 mass %, PEO 50 mass %).
  • PA 50 mass %, PEO 50 mass %) polyethylene oxide and polyamide block copolymers
  • K + ions were used in an amount of 0.4 mass %.
  • An ion conductive polymer blend B was produced by means of a double-screw extruder.
  • the blend consisted of 50 mass % ethylene/butyl acrylate/methacrylic acid terpolymers (BA 4 mass %, MAA 2 mass %), and 50 mass % polyethylene oxide and polyurethane block copolymers (PUR 30 mass %, PEO 70 mass %).
  • As ions K + ions were used in an amount of 0.4 mass %.
  • the example fibres were produced by means of a pilot scale bicomponent fiber device.
  • the polypropylene having a temperature within the range of 190 - 250 0 C, and the polyester within the range of 250 - 300 °C. 1.
  • a bicomponent polypropylene fiber was defibrated such that pure polypropylene was used in the sheath layer and as the core a blend of an ion conductive plastic A and polypropylene, whereby the concentration of polypropylene was 50 % of the core mass.
  • a bicomponent polypropylene fiber was defibrated such that pure polypropylene was used in the sheath layer and as the core a blend of an ion conductive plastic A and polypropylene, whereby the concentration of polypropylene was 30 % of the core mass.
  • a bicomponent polypropylene fiber was defibrated such that pure polypropylene was used in the sheath layer and as the core a blend of an ion conductive plastic A and polypropylene, whereby the concentration of polypropylene was 20 % of the core mass.
  • a bicomponent polypropylene fiber was defibrated such that pure polypropylene was used in the sheath layer and as the core a blend of an ion conductive plastic A and polypropylene, whereby the concentration of polypropylene was 10 % of the core mass.
  • a bicomponent polyester fiber was defibrated such that pure polyester was used in the sheath layer and as the core a blend of an ion conductive plastic B and polyester, whereby the polyester concentration was 50 % of the core mass.
  • a bicomponent polyester fiber was defibrated such that pure polyester was used in the sheath layer and as the core a blend of an ion conductive plastic B and polyester, whereby the polyester concentration was 30 % of the core mass.
  • a bicomponent polyester fiber was defibrated such that pure polyester was used in the sheath layer and as the core a blend of an ion conductive plastic B and polyester, whereby the polyester concentration was 10 % of the core mass.
  • the triboelectrical accumulation of charge of the example fibres and of two of the reference example fibres was measured by rubbing aluminum, as well as the charge decay time by corona charging.
  • the measurements were carried out according to Standard IEC 61340-5-1.
  • a PFM-711 electric field strength measurer was used, which is capable of measuring fields at a distance of an inch until 20 kV.
  • Table 1 The results are shown in Table 1.
  • the maximum accumulation of charge is determined after the exposure as the biggest observation. After the observation of the maximum the residual charge is measured after 10 seconds.

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  • 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)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

La présente invention décrit une structure fibreuse antistatique ou quasi-antistatique qui peut par exemple être employée dans des tissus et des filtres, de même qu’une méthode de fabrication de ladite structure. Le cœur de la fibre est constitué d'un matériau polymère, qui est au moins en partie un conducteur électrique, ou qui présente des propriétés antistatiques, alors que la gaine est constituée d’un polymère thermoplastique entourant le noyau. Ledit cœur contient un polymère conducteur ionique. Ainsi, le temps de décroissance de charge de la fibre est inférieur à 10 s selon la Norme CEI 61340-5-1, et la résistivité de surface de la fibre est égale ou sensiblement égale à celle du matériau de la gaine.
PCT/FI2005/000454 2004-10-20 2005-10-20 Fibres antistatiques WO2006042904A1 (fr)

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FI20041362 2004-10-20
FI20041362A FI121603B (fi) 2004-10-20 2004-10-20 Kuidut

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1995359A1 (fr) * 2006-03-10 2008-11-26 Kuraray Co., Ltd. Fibre composite conductrice et son procede de fabrication
EP2347043B1 (fr) * 2008-10-17 2018-11-21 Invista Technologies S.à.r.l. Fibre spandex à deux composants

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1230195A (fr) * 1968-05-30 1971-04-28
GB1442581A (en) * 1975-01-28 1976-07-14 Du Pont Antistatic filaments
JPS61201016A (ja) * 1985-02-28 1986-09-05 Toray Ind Inc ポリエステル繊維の製造方法
WO2003000789A1 (fr) * 2001-06-26 2003-01-03 Ionphase Oy Melange polymere

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GB1230195A (fr) * 1968-05-30 1971-04-28
GB1442581A (en) * 1975-01-28 1976-07-14 Du Pont Antistatic filaments
JPS61201016A (ja) * 1985-02-28 1986-09-05 Toray Ind Inc ポリエステル繊維の製造方法
WO2003000789A1 (fr) * 2001-06-26 2003-01-03 Ionphase Oy Melange polymere

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1995359A1 (fr) * 2006-03-10 2008-11-26 Kuraray Co., Ltd. Fibre composite conductrice et son procede de fabrication
EP1995359A4 (fr) * 2006-03-10 2009-07-08 Kuraray Co Fibre composite conductrice et son procede de fabrication
JP4859916B2 (ja) * 2006-03-10 2012-01-25 株式会社クラレ 導電性複合繊維及びその製造方法
EP2347043B1 (fr) * 2008-10-17 2018-11-21 Invista Technologies S.à.r.l. Fibre spandex à deux composants

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FI121603B (fi) 2011-01-31
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