EP3631057A1

EP3631057A1 - Polyketone fibers, production and use thereof

Info

Publication number: EP3631057A1
Application number: EP18728303.1A
Authority: EP
Inventors: Andreas Hilmar Fischer; Pascal Heckenbenner; Benedikt NEUGIRG
Original assignee: Perlon GmbH
Current assignee: Perlon GmbH
Priority date: 2017-05-30
Filing date: 2018-05-18
Publication date: 2020-04-08
Anticipated expiration: 2038-05-18
Also published as: JP2020521893A; PL3631056T3; US20200080236A1; MX2019014377A; KR20200038427A; FI3631057T3; PT3631056T; WO2018219495A1; CN110678588A; EP3631056A1; EP3631057B1; DE202017002839U1; ES2891998T3; WO2018219494A8; EP3631056B1; WO2018219494A1

Abstract

The invention relates to melt-spun fibers, containing thermoplastic aliphatic polyketone as a first polymer and a selected polymeric component as a second polymer. Said fibers are distinguished by excellent mechanical properties, such as good flexural recovery, by very good sliding properties, by high resistance to hydrolysis and by high resistance to abrasion.

Description

description

Polyketone fibers, their preparation and use

The present invention relates to melt spun fibers

selected polyketones containing compositions whose

Production and different applications of these fibers.

For technical applications, synthetic filaments of melt-spinnable polymers are preferred. For reasons of cost, use is made of standard polymers which have been known for a long time, for example polyolefins such as polyethylene (PE), polypropylene (PP), polyamides such as polyamide 6

(PA 6), polyamide 6.6 (PA 6.6) or on polyester, such as polyethylene terephthalate (PET), if threads made of these polymers can meet the desired requirements. In technical applications, a low sliding friction of textile fabrics is often desired. Frequently, additional properties are desired, such as a certain coloration, stability against degradation by thermal stress or by the action of radiation, special mechanical properties such as increased impact strength, low elongation at break, increased abrasion resistance, dimensional stability, bending strength or bending recovery.

Aliphatic polyketone fibers and combinations of aliphatic polyketones with selected other polymers are known.

CONFIRMATION COPY EP 0 310 171 A2 describes melt-spun fibers from these

Materials, such as ethylene / propylene / CO terpolymers. These fibers have high tensile strengths and moduli of elasticity and are proposed for use as tire cord or for the production of spunbonded nonwovens. The latter are suitable for the production of roof underlays or as geotextiles.

DE 197 57 607 A1 discloses polyamide / polyketone blends which can be processed into threads or fibers. Multi-component fibers are not disclosed.

DE 198 53 707 A1 discloses stabilized aliphatic polyketones, which may be present inter alia as fibers. WO 94/20562 A1 and WO 99/41437 A1 disclose aliphatic polyketones, which are present inter alia as fibers and which may be stabilized with antioxidants.

CN 106 521 704 A describes mixtures of aliphatic polyketones and polyoxymethylene which may, inter alia, be present as fibers and which may be stabilized with antioxidants. Multi-component fibers are not disclosed.

WO 2016/190594 A2 and WO 2016/190596 A2 disclose wet-spun fibers of ethylene / propylene / -CO-terpolymers which are excellent

Have strength and elongation values and are also characterized by a high water and heat resistance and good thermal conductivity. As applications for these fibers, various uses are proposed, for example the production of ropes, tubes, nets, spunbonded fabrics, airbags or protective clothing, and use as geotextiles, as reinforcing fibers in composites, as belts, safety nets, conveyor belts, fishing lines or tennis strings. In wet spinning, the dissolved polymer is spun into threads by a spinning capillary. The solvent is recovered as completely as possible and returned to the manufacturing process. Nevertheless, it can not be avoided that small amounts of the solvent used remain in the finished fiber. It is desirable to provide a solvent-free fiber. This avoids any potential safety hazard caused by the presence of solvent residues in the fiber; In addition, higher degrees of crystallization can be achieved by melt spinning, which can have an advantageous effect on the mechanical properties of the fiber.

On the other hand, processing by melt spinning often has to be done at significantly higher temperatures than when wet spinning. This can lead to accelerated degradation or crosslinking reactions of the polymer, which in turn can adversely affect the properties of the fiber produced or can lead to crosslinking reactions of the polymer, which can limit their processability in the extrusion process.

Surprisingly, it was found that by a combination of adapted process parameters (temperature, shear, throughput, spinning delay, degree of stretching, fixation, residence time), the degree of crosslinking of the polymer could be controlled and thereby the thermomechanical properties of the fibers could be specifically improved, such B. their heat resistance, hydrolysis resistance, chemical resistance,

Abrasion resistance, flexural strength, flexural recovery, modulus, creep, and cranking propensity. The dimensional stability describes the tendency of a fiber under tension and at a certain temperature to show a change in length. It results from a combination of the tensile modulus and creep properties of the fiber, for example a monofilament.

It has been found that the dimensional stability of the aliphatic polyketone-based fibers can be achieved by suitable additives. It is possible to use selected polymeric additives which are dispersed in the matrix of aliphatic polyketone. In this case, for example, fibrils can form from the dispersed phase and / or the surface of the fiber is modified by the dispersed phase.

In combinations of aliphatic polyketones and selected other polymers, the individual polymer components complement each other in

synergistic way. Thus, the fibers are replaced by the other polymers e.g. excellent mechanical properties (high modulus, low creep, low tendency to bend) and due to the aliphatic polyketone low sliding friction and increased abrasion resistance.

Furthermore, it has been found that textile surfaces, such as fabric or container, the yarns of aliphatic polyketone or multi-component yarns with aliphatic polyketone as a shell and with the other polymer as the core a very low sliding friction and a very high abrasion resistance in drying and in wet conditions exhibit.

Furthermore, it has been found that fibers of selected conventional polymers with aliphatic polyketones can be combined into fibers which are characterized by a low sliding friction and high flexural strength. Thus, multicomponent fibers having selected properties can be obtained, for example, core / sheath fibers wherein the sheath is aliphatic polyketone and the core is polyester, for example polyethylene terephthalate or polycarbonate, or higher melting point aliphatic polyketone than the sheath aliphatic polyketone , By varying the melting points of the sheath polymers, for example, adhesive properties can be adjusted in a targeted manner. Due to the intrinsic chemical resistance and good barrier properties of aliphatic polyketones, core-sheath fibers with high chemical resistance can be produced.

So it can hot-melt variants with low melting point and thus possible thermal bonding with a substrate or with others

Monofilaments in a textile construct, e.g. in woven or knitted fabrics. In addition, fibers are produced with low coefficients of friction and very good abrasion resistance. An object of the present invention is to provide such fibers having the above property profile.

Another object of the present invention is to provide a spinning process for producing such fibers.

The present invention relates in a first embodiment

melt-spun fibers containing thermoplastic aliphatic polyketone as the first polymer and polyolefin, polyester, polyurethane,

Polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystalline polymer and / or aliphatic polyketone as the second polymer, wherein in the event that

aliphatic polyketone is present as the second polymer whose melting point is at least 5 ° C, preferably at least 10 ° C, more preferably at least 20 ° C higher than the melting point of the aliphatic polyketone of the first polymer.

In a second embodiment, the present invention relates to melt spun fibers containing thermoplastic aliphatic polyketone as the first polymer and polyolefin, polyester, polyamide, polyoxymethylene,

Polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystalline polymer and / or aliphatic polyketone as the second polymer, said polymers being in the form of two or more fiber components spatially separated from each other but contiguous, and if so in that aliphatic polyketone is contained as a second polymer whose melting point is at least 5 ° C, preferably at least 10 ° C, more preferably at least 20 ° C higher than the melting point of the aliphatic polyketone of the first polymer. In a third embodiment, the present invention relates to melt-spun fibers containing thermoplastic aliphatic polyketone as a matrix polymer and dispersing therein particles of polysiloxanes or

Poly (meth) acrylates. The aliphatic polyketones used in the invention are homo- or copolymers having recurring structural units of the formula -Ri-CO-, where Ri is a divalent aliphatic radical, preferably a bivalent aliphatic radical having two to six carbon atoms. Preferred radicals R 1 have the formula -C _n H 2 _n -, in which n is 2, 3 or 4, in particular 2 or 3. Copolymers having different radicals are preferred in the

Polymer chain used, for example, with radicals -C ₂ H ₄ - and with radicals

The aliphatic polyketone used is particularly preferably a thermoplastic ethylene / propylene / CO terpolymer.

Aliphatic polyketones are partially crystalline polymers that have a melting point in differential thermal analysis (DSC). For purposes of the present specification, DSC analysis is performed according to ASTM D3418. The heating rate is 10 K / min.

Also particularly preferably used are aliphatic polyketones having a melting range of 199 to 220 ° C and having an MFI value at 240 ° C and 2.16 daN from 6 to 60 g / 10 min (according to ASTM D 1238).

The aliphatic polyketones used according to the invention are polymers which are known per se and have already been used for fiber production. In a preferred embodiment, the melt-spun fibers according to the invention contain an antioxidant.

As antioxidants, hindered phenols and / or HALS

(hindered amine light stabilizer) and / or phosphites are used, which are optionally combined with co-stabilizers. Preferably used antioxidants based on sterically hindered phenols are sterically hindered alkylated monophenols, for example 2,6-di-tert-butyl-4-methylphenol or 2,6-di-tert-butyl-4-methoxyphenol; sterically hindered alkylthiomethylphenols, for example 2,4-dioctylthiomethyl-6-tert-butylphenol, sterically hindered hydroxylated thiodiphenyl ethers, for example 2,2'-thiobis (6-tert-butyl-4-methylphenol), 4,4 ' Thio-bis (6-tert-butyl-3-methylphenol), 4,4'-thio-bis (6-tert-butyl-2-methylphenol), 4,4'-thio-bis ( 3,6-di-sec-amylphenol), 4,4'-bis (2,6-di-methyl-4-hydroxyphenyl) disulfide; sterically hindered alkylidene bisphenols, eg 2,2'-methylenebis (6-tert-butyl-4-methylphenol; sterically hindered benzylphenols, eg 3,5,3 ', 5'-tetra-tert-butyl-4, 4'-dihydroxydibenzyl ethers; hindered hydroxybenzylated malonates, eg, dioctadecyl-2,2-bis (3,5-di-tert-butyl-2-hydroxybenzyl) malonate; hindered hydroxybenzyl aromatic compounds, eg, 1, 3,5-tris (3,5-di-tert-butyl) -4-hydroxybenzyl) -2,4,6-trimethylbenzene, 1,4-bis (3,5-di-tert-butyl) 4-hydroxybenzyl) -2,3,5,6-tetramethylbenzene, 2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) phenol; sterically hindered phenolic triazine compounds, e.g. B. 2,4-bis-octylmercapto-6 (3,5-di-tert-butyl-4-hydroxyanilino) -1, 3,5-triazine; sterically hindered phenolic benzylphosphonates, e.g. Dimethyl-2,5-di-tert-butyl-4-hydroxybenzylphosphonate; N- (3,5-di-tert-butyl-4-hydroxyphenyl) -carbamic acid alkyl ester; Esters of β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid with monohydric or polyhydric alcohols; Esters of β- (5-tert-butyl-4-hydroxy-3-methylphenyl) propionic acid with monohydric or polyhydric alcohols; Esters of β- (3,5-dicyclohexyl-4-hydroxyphenyl) propionic acid with monohydric or polyhydric alcohols; Esters of 3,5-di-tert-butyl-4-hydroxyphenylacetic acid with monohydric or polyhydric alcohols; Amides of β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, such as. N, N'-bis- (3,5-di-tert-butyl-4-hydroxy-phenylpropionyl) -hexamethylenediamine, N, N'-bis- (3,5-di-tert-butyl-4-hydroxy -phenylpropionyl) - trimethylenediamine or N, N'-bis (3,5-di-tert-butyl-4-hydroxyphenylpropionyl) hydrazine.

Preferred co-stabilizers include organic phosphites and / or organic phosphonites. These are known co-stabilizers for antioxidants.

The proportion of antioxidant is usually between 0.05 and 10 wt .-%, based on the total mass of the fiber. Preference is given to shares

Antioxidant from 0.1 to 5 wt .-%, in particular from 0.5 to 3 wt .-%.

In the first embodiment, the fibers according to the invention comprise, in addition to the thermoplastic aliphatic polyketone, as the first polymer at least one polyolefin, polyester, polyurethane, polyphenylene sulfide,

Polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystalline polymer and / or another aliphatic polyketone as a second polymer. In the second embodiment of the

Polyamide and / or polyoxymethylene can also be used as the second polymer.

The proportion of aliphatic polyketone as the first polymer in the fibers of the invention is usually between 5 and 90 wt .-%, based on the total mass of the fiber. Preference is given to proportions of aliphatic polyketone as the first polymer of from 10 to 80% by weight, in particular from 20 to 50% by weight.

The proportion of polyolefin, polyester, polyurethane, polyphenylene sulfide,

Polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystal polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene as the second polymer in the Fibers according to the invention are usually between 10 and 95% by weight, based on the total mass of the fiber. Preference is given to proportions of polyolefin, polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone,

liquid crystalline polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene as second polymer from 20 to 90 wt .-%, in particular from 50 to 80 wt .-%.

In the polyolefins, polyesters,

Polyurethanes, polyphenylene sulfides, polyphenylene sulfones, polyphenylene ethers, polyphenylene ketones, polyphenylene ether ketones, liquid-crystalline polymers, other aliphatic polyketones, polyamides and / or

Polyoxymethylenes are known polymers which have also been used for fiber production.

Examples of polyolefins are homopolymers or copolymers derived from ethylene and / or from propylene optionally in combination with other ethylenically unsaturated aliphatic hydrocarbons, such as α-olefins having four to eight carbon atoms. Polyethylene and polypropylene can be in different densities and crystallinities. For the use according to the invention, all these modifications are fundamentally suitable.

Examples of polyesters are thermoplastic polymers derived from aliphatic, cycloaliphatic and / or aromatic dicarboxylic acids or their polyester-forming derivatives, such as the alkyl esters, and from

aliphatic, cycloaliphatic and / or aromatic divalent

Alcohols such as ethylene glycol, propylene glycol and / or butylene glycol.

Further examples of polyesters are thermoplastic-elastomeric polyesters (TPE-PE), for example polyesters containing repeating ethylene Terephthalate structural units and containing recurring

Polyethylene glycol terephthalate structural units. TPE-PE are known to the person skilled in the art. Another example of polyesters are polycarbonates. These are preferably used. Polycarbonates are formally carbonic polyesters containing the repeating structural unit - [R-O-CO-O] -, wherein R is a residue of a dihydric organic alcohol or phenol after removal of the two alcohol groups. Preferably, R is the radical of an aromatic dihydroxy compound, ie a bisphenol.

Preferred radicals R are derived from 2,2-bis (4-hydroxyphenyl) propane (bisphenol A), bis (4-hydroxyphenyl) methane (bisphenol F), bis (4-hydroxyphenyl) sulfone (bisphenol S), dihydroxydiphenylsulfide, tetramethyl-bisphenol A or 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane

(BPTMC).

By using mixtures of the above components, properties of the resulting polycarbonate can be varied. To lead

Cocondensates of bisphenol A and BPTMC to highly transparent and heat-resistant plastics. The incorporation of higher-functionality alcohols / phenols is possible, for example, 1, 1, 1-tris (4-hydroxyphenyl) ethane (THPE). This allows the incorporation of chain branches which positively influence the intrinsic viscosity during the processing of the material.

Likewise preferred are aromatic-aliphatic polyester homopolymers or copolymers. Examples thereof are polyethylene terephthalate homopolymers or copolymers containing ethylene terephthalate units. These preferred polymers are thus derived from ethylene glycol and optionally further alcohols and terephthalic acid or their polyester-forming derivatives, such as terephthalic acid esters or chlorides.

In addition to or instead of ethylene glycol, these polyesters may contain structural units derived from other suitable dihydric alcohols. Typical representatives thereof are aliphatic and / or cycloaliphatic diols, for example propanediol, 1,4-butanediol, cyclohexanedimethanol or mixtures thereof.

In addition to or instead of terephthalic acid or its polyester-forming derivatives, these polyesters may contain structural units derived from other suitable dicarboxylic acids or from their polyester-forming derivatives. Typical representatives thereof are aromatic and / or aliphatic and / or cycloaliphatic dicarboxylic acids, for example naphthalenedicarboxylic acid, isophthalic acid, cyclohexanedicarboxylic acid, adipic acid,

Sebacic acid or mixtures thereof.

It is thus also possible to produce fibers containing other polyesters, such as polybutylene terephthalate, polypropylene terephthalate, polyethylene naphthalate homopolymer or copolymers comprising ethylene naphthalate units.

These thermoplastic polyesters are known per se. Building blocks of thermoplastic copolyesters are preferably the abovementioned diols and dicarboxylic acids, or correspondingly constructed polyester-forming derivatives.

Preference is given to using polyesters whose solution viscosities (IV values) are at least 0.60 dl / g, preferably from 0.80 to 1.05 dl / g, particularly preferably from 0.80 to 0.95 dl / g ( measured at 25 ° C in dichloroacetic acid (DCE)). Polyesters used according to the invention can also be derived from hydroxycarboxylic acids.

Examples of polyamides that can be used in the second embodiment of the invention are thermoplastic polymers derived from aliphatic, cycloaliphatic and / or aromatic dicarboxylic acids or their polyamide-forming derivatives, such as their salts, and aliphatic, cycloaliphatic and / or aromatic dihydric amines, such as

Hexamethylene diamine.

Further examples of polyamides are thermoplastic-elastomeric polyamides (TPE-PA), for example polyamides containing recurring polyamides

Hexamethylene terephthalamide structural units and containing repeating polyethylene glycol terephthalamide structural units. TPE-PA are the

Specialist known.

Preferably used polyamides are partially crystalline aliphatic polyamides, which can be prepared starting from aliphatic diamines and aliphatic dicarboxylic acids and / or cycloaliphatic lactams with at least 5 ring members or corresponding amino acids.

Suitable starting materials are aliphatic dicarboxylic acids, preferably adipic acid, 2,2,4- and 2,4,4-trimethyladipic acid, azelaic acid and / or sebacic acid, aliphatic diamines, preferably tetramethylenediamine, hexamethylenediamine, 1, 9-nonanediamine, 2,2,4- and 2,4,4-trimethylhexamethylenediamine, the isomeric diaminodicyclo-hexylmethanes, diaminodicyclohexylpropanes, bis-aminomethyl-cyclohexane, aminocarboxylic acids, preferably aminocaproic acid or the corresponding lactams. Copolyamides of several of the monomers mentioned are included. Particularly preferred are caprolactams, most preferably ε-caprolactam is used. The aliphatic homo- or copolyamides used according to the invention are preferably polyamide 12, polyamide 4, polyamide 4.6, polyamide 6, polyamide 6.6, polyamide 6.9, polyamide 6.10, polyamide 6.12, polyamide 6.66, polyamide 7.7, polyamide 8.8, polyamide 9.9, Polyamide 10.9, Polyamide 10.10, Polyamide 11 or Polyamide 12.

Polyesters and polyamides used according to the invention can also be derived from hydroxycarboxylic acids or from aminocarboxylic acids.

Examples of polyoxymethylenes that can be used in the second embodiment of the invention are homo- or copolymers containing recurring structural units of the formula -CH ₂ -O-. Examples of polyurethanes are homo- or copolymers derived from aromatic or (cyclo) aliphatic diisocyanates and from (cyclo) aliphatic or aromatic diols. Polyurethanes contain, for example, recurring structural units of the formula -C ₆ H ₄ -NH-CO-O-C ₂ H ₄ -O-CO-NH-.

Further examples of polyurethanes are thermoplastic elastomers

Polyurethanes (TPE-PU). TPE-PU are known to the person skilled in the art.

Examples of polyphenylene sulfides are poly-p-phenylene sulfides, for example homopolymers or copolymers containing recurring structural units

-para-C ₆ H ₄ -S-.

Examples of polyphenylene sulfones are poly-p-phenylene sulfones, for example homopolymers or copolymers containing recurring structural units

-para-C ₆ H ₄ -SO x-, where x is a number between 1 and 2. Examples of polyphenylene ethers are poly-p-phenylene ethers, for example homo- or copolymers containing recurring structural units

-para-C ₆ H ₄ -0-.

Examples of polyphenylene ketones are poly-p-phenylene ketones, for example homopolymers or copolymers containing recurring structural units

-para-C ₆ H ₄ -CO-. Examples of polyphenylene ether ketones are poly-p-phenylene ether ketones, for example copolymers containing repeating structural units -para-CeH ₄ -CO- and recurring structural units -para-C ₆ H -O-.

Examples of liquid-crystalline polymers are liquid-crystalline aromatic polyesters, for example homopolymers or copolymers comprising recurring structural units derived from para-hydroxybenzoic acid.

In the fibers of the present invention, the first polymer and the second polymer may be present as a polymer blend, or the polymers may be in the form of two or more fiber components spaced apart but coextensive.

Preferred are fibers in which the first polymer and the second polymer are present as a polymer mixture, wherein one of the polymers, preferably the aliphatic polyketone, forms a matrix and the other polymer is dispersed in the form of fibrils in the matrix.

Examples of this embodiment are fibers in the form of islet-in-sea fibers, in which a polymer component in the form of fibrils is thus arranged in the polymeric matrix component. The fibrils are preferred oriented in the longitudinal direction of the fiber and thereby increase

Tensile strength and modulus of the fiber.

For example, by metering in 1 to 7% of liquid-crystalline polyester, the tensile modulus of the monofilament of aliphatic polyketone could be significantly increased (see Example 4).

As examples of fibers in which the polymers are in the form of two or more fiber components spatially separated from one another but contiguous, multicomponent fibers may be mentioned.

The at least two polymers in the fiber according to the invention can therefore be present as a polymer mixture or the at least two polymers can be present in the form of two or more fiber components, which are spatially separated from one another but arranged in a continuous manner. Examples of this latter embodiment are multicomponent fibers which may be present, for example, as core-sheath fibers or as side-by-side fibers.

Preference is given to fibers comprising a mixture of aliphatic polyketone and polycarbonate.

Preferred are fibers wherein one of the polymer components, preferably the aliphatic polyketone-differing polymer, is in the form of fibrils in a polymer matrix component.

Particularly preferred are fibers, wherein the aliphatic polyketone forms a polymer matrix and another polymer selected from the group of polyolefins, polyesters, polyphenylene ketones, polyphenylene ether ketones and / or liquid crystalline polymers in the form of fibrils in the polymer matrix component. Most preferably, these fibers contain as a further polymer, a liquid crystalline polymer. Further preferred are core sheath fibers with an overcoat of aliphatic polyketone and with a core of polyolefin, polyester, polyurethane,

Polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystal polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene be used, wherein in the event that aliphatic polyketone is present in the core, its melting point at least 5 ° C, preferably at least 10 ° C and in particular at least 20 ° C is higher than the melting point of

aliphatic polyketone in the jacket. Core sheath fibers with a sheath are particularly preferred

aliphatic polyketone and having a core of polyester, polyphenylene sulfide, polyphenylene ether, polyphenylene ketone or polyphenylene ether ketone. Also preferred are side-by-side fibers having an aliphatic polyketone fiber portion and another fiber portion in contact therewith of polyolefin, polyester, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone,

liquid crystal polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene, wherein in the event that aliphatic polyketone is present in the further fiber portion whose melting point is at least 5 ° C, preferably at least 10 ° C and especially at least 20 ° C higher than the melting point of the aliphatic polyketone in the other fiber part. Also particularly preferred are side-by-side fibers having a fiber portion of aliphatic polyketone and another fiber portion in contact therewith of polyester, polyphenylene sulfide, polyphenylene ether, polyphenylene ketone or polyphenylene ether ketone.

Also preferred are side-by-side fibers having a fiber portion of aliphatic polyketone and another fiber portion in contact therewith of polyolefin, polyester, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone and / or liquid crystalline polymer.

Very particular preference is given to core sheath fibers in which the sheath contains aliphatic polyketone as the polymer and the core contains one or more of the abovementioned second polymers and in addition at least one additive is present in the core and / or sheath which gives the fiber a specific functionality gives.

Very particular preference is furthermore given to side-by-side fibers in which one fiber part contains aliphatic polyketone as polymer and the other fiber part contains one or more of the abovementioned second polymers and additionally at least one additive which gives the fiber a specific

Gives functionality.

Also particularly preferred are core sheath fibers having an aliphatic polyketone sheath and a further aliphatic core

Polyketone whose melting point is at least 5 ° C, preferably at least 10 ° C and in particular at least 20 ° C higher than the melting point of the aliphatic polyketone in the jacket. Thus, for example, core-shell structures with cores of polyesters, such as PET or polycarbonate, or aliphatic polyketones of higher melting point than the sheath polymer can produce fibers with good thermal stability. These are characterized in comparison with aliphatic polyketone fibers by high tensile and flexural Moduli and therefore by high stability, for example, in core-sheath fibers with PET in the jacket. These fibers often exhibit good dimensional stability under tension at temperatures up to 150 ° C. In a third embodiment of the invention, fibers are provided in which the fiber surface is modified by selected polymer particles dispersed in the matrix polymer. A

Functionalization and texturing of the surface can be achieved by addition of polysiloxane particles, such as PMSQ particles and / or

Poly (meth) acrylate particles, such as crosslinked PMMA microspheres can be achieved. Typical diameters of these particles range from 0.2 to 100 pm. Thus, microtexturing of the surface can be created and the surface properties of the fiber can be modified. Above all, this reduces the friction surface and significantly improves the friction properties. In addition, the cleaning properties of the fiber are improved.

In this embodiment, the invention relates to fibers, in particular

Monofilaments comprising a matrix of aliphatic polyketone and dispersed therein particles of polysiloxane and / or of poly (meth) acrylate, which have a diameter of 200 nm to 100 pm.

The particles can have any shape. Examples are particles with rotationally symmetrical shape, in particular spheres, but also with an irregular shape. These particles are present as micropowder. Of the Diameter of these particles is in the range of 0.2 to 100 ^μ η τι, preferably from 1 to 50 m. The diameter specification for particles with varying diameters refers to the largest diameter of the particle.

Preference monofilaments contain spherical particles of polysiloxane whose diameter is from 1 to 50 μητι.

The particles are dispersed as micropowder in the matrix polymer. In general, from 0.001% by weight to 8% by weight, preferably from 0.02% by weight to 5% by weight, of particles are metered into the matrix polymer. The particles are present in the matrix polymer as a heterogeneous phase. The particles may be present as individual particles in the matrix polymer and / or as aggregates of various individual particles.

The polysiloxanes used in the invention is a group of synthetic polymers in which silicon atoms via

Oxygen atoms are linked. The inventively used

Polysiloxanes are also called silicones. These may be linear or crosslinked polysiloxanes or also polysiloxanes with cage structure, so-called silsesquioxanes.

Preference is given to using linear or crosslinked polysiloxanes comprising the recurring structural element -SiR ¹ R ² -O- or silsesquioxanes of the formula R ¹ SiO _3/2 , in which R ^{1 is} C ₁ -C ₆ -alkyl, in particular methyl, and R ² is C ₁ -C 4 ₆ alkyl or phenyl, in particular methyl or phenyl.

Very particular preference is given to monofilaments which contain polysiloxanes which are linear or crosslinked polydimethylsiloxanes or polymethylsilsesquioxane. The poly (meth) acrylates used according to the invention are a group of synthetic polymers derived from esters of acrylic acid and / or esters of methacrylic acid. In addition, you can

Poly (meth) acrylates have further copolymerized with esters of acrylic acid and / or with esters of methacrylic acid monomer units. The poly (meth) acrylates used according to the invention may be linear or, preferably, crosslinked poly (meth) acrylates.

Homopolymers or copolymers of methyl acrylate or of methyl methacrylate are preferably used as the poly (meth) acrylates.

Examples of the above-mentioned additives are electroconductive additives, lubricants, anti-adhesion agents, blowing agents for producing foamed or porous fiber surfaces, pigments and / or fillers.

Preferred multicomponent fibers comprise a part of aliphatic polyketone and another part in contact therewith of one of the abovementioned types of polymer, in particular polyester, very particularly preferably TPE-PE, or in particular polyurethane, very particularly preferably TPE-PU, where the aliphatic polyketone mainly the Slip properties improved and the second polymer component mainly improves other properties, such as. B improved grip properties mediated e.g. TPE-PE or TPE-PU or hot melt adhesive properties mediates e.g. by co-polyester.

The aliphatic polyketones used according to the invention and / or the further polymers selected from the group consisting of polyolefin, polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ethers, polyphenylene ketone, polyphenylene ether ketone, liquid crystalline polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene may contain additional additives which impart a desired property to the fibers produced. Examples of such additives are UV stabilizers, pigments, dyes, fillers, matting agents, reinforcing agents,

Crosslinking agents, crystallization accelerators, lubricants, flame retardants, antistatic agents, hydrolysis stabilizers, plasticizers, impact modifiers and / or other aliphatic polymers

Polyketones, polyolefins, polyesters, polyphenylene sulfides,

Polyphenylene sulfones, polyphenylene ethers, polyphenylene ketones, poly phenylene ether ketones, liquid crystalline polymers, other aliphatic polyketones, polyamides and / or polyoxymethylenes differ. These additives are known in the art. Examples of preferred UV stabilizers are UV-absorbing compounds, such as benzophenones or benzotriazoles, or compounds of the HALS ("hindered amine light stabilizer") type.

Examples of preferred pigments are carbon black, titanium dioxide or iron oxides.

Examples of preferred dyes are anionic dyes, acid dyes, metal complex dyes, cationic or basic dyes and

Disperse dyes. Examples of preferred fillers are carbonates, such as chalk or dolomite, silicates, such as talc, mica, kaolin or sulfates, such as baryta, or oxides and hydroxides, such as quartz, crystalline silica, aluminum or

Magnesium hydroxides or magnesium, zinc or calcium oxides). An example of a preferred matting agent is titanium dioxide. An example of a preferred reinforcing material is glass fibers.

Examples of preferred crosslinking agents are polybasic carboxylic acids and their esters, polyhydric alcohols, polycarbonates or polycarbodiimides.

Examples of preferred crystallization accelerators are carboxylic acid esters.

Examples of preferred lubricants are polyolefin waxes, fatty acids or their salts, fatty alcohols, fatty acid esters, silicones, polymethacrylate

Spheres, polysiloxanes and in particular PMSQ, as described in EP 2,933,361 A1.

Examples of preferred flame retardants are phosphorus-containing

Compounds, organic halogen compounds, nitrogen-containing organic compounds or combinations thereof.

Examples of preferred antistatic agents are carbon blacks, graphite, graphene or carbon nanotubes.

Examples of preferred hydrolysis stabilizers are carbodiimides or epoxidized compounds.

Examples of preferred processing aids are waxes or

longer-chain carboxylic acids or their salts, aliphatic, aromatic esters or ethers.

Examples of preferred plasticizers are diethylhexyl phthalate, alkylsulfonic acid esters of phenol, triethyl citrate, diethylhexyl adipate or diethyloctyl adipate. Examples of preferred impact modifiers are thermoplastic

Elastomers such as thermoplastic copolyamides, thermoplastic polyester elastomers, thermoplastic copolyesters, olefin-based thermoplastic elastomers, styrene copolymers such as SBS, SEBS, SEPS, SEEPS, MBS, ABS, SAN or SBK, urethane-based thermoplastic elastomers, thermoplastic vulcanizates or crosslinked thermoplastic elastomers

Olefin base, especially PP / EPDM, or polycarbonate. Examples of preferred further polymers are fluoropolymers, such as polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer or polychlorotrifluoroethylene.

The proportion of these additional additives in the fiber according to the invention can usually be up to 10 wt .-%, based on the total mass of the fiber. These additional additives are preferably used in amounts of from 1 to 5% by weight.

In a preferred embodiment, the present invention relates to melt spun core sheath fibers comprising a sheath

thermoplastic ethylene / propylene / CO terpolymer and a core of polyolefin, polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone,

liquid crystalline polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene, wherein the mass of the shell 5 to 50 wt .-% and the mass of the core is 95 to 5 wt .-%, and wherein the core and / or the shell optionally total may contain up to 10% by weight of additives, especially hindered phenol, UV stabilizers, pigments, dyes, fillers, matting agents, crosslinking agents,

Crystallization accelerators, lubricants, flame retardants, antistatic agents, Hydrolysis stabilizers, plasticizers, impact modifiers and / or fluoropolymers, wherein the percentages are based on the total mass of the fibers. In the context of this description, the term "fiber" is to be understood as meaning a linear structure which is thin in relation to its length .The ratio of length to diameter of a fiber is typically at least 5: 1. and are then called filaments) and can be cut to finite length (and are then called bristles or short cut fibers) .Fibers may also be in the form of multiple filaments or in the form of multiple staple fibers The invention preferably relates to fibers in the form of Monofilaments, bristles or short cut fibers The cross-sectional shape of the fibers according to the invention may be any desired, and may be irregular cross sections, point or axisymmetric cross sections, for example round, oval or rectangular cross sections, where n is greater than or equal to 3. The cross sectional shape The fibers can also be multilobal.

The strength (titer) of the fibers according to the invention can be expressed by the thread weight. 1 dtex corresponds to a fiber mass of 1 g per 10 km fiber length. Typical thread weights range from 1 to 100,000 dtex.

The titer of the inventively preferred monofilaments, bristles or short cut fibers is preferably at least 10 dtex and can vary widely. Preferred titres of monofilaments, bristles or short cut fibers are in the range from 10 to 30,000 dtex, in particular in the range from 45 to 20,000 dtex. The components required for producing the fibers according to the invention are known per se, some are commercially available or can be prepared by processes known per se.

The fibers according to the invention are preferably used for the production of textile fabrics, in particular of woven, laid, knitted, braided or knitted fabrics. The production of these fabrics is carried out by known techniques.

The production of the fibers according to the invention can be carried out by a basically known melt spinning process, combined with on or

multiple stretching and fixing of the obtained fibers. The invention also relates to a method of the above-described polyketone fibers.

In a first embodiment of the process according to the invention, polyketone raw material, together with the sterically hindered phenol, is metered into an extruder and pressed in molten form through a die plate. The nozzle plate may have one or more spinning capillaries. The resulting filament is withdrawn from the spinning capillary. The

Withdrawal speed is usually 1 to 120 m / min, in particular 5 to 50 m / min.

The hindered phenol and / or further additives may be added in the form of a masterbatch containing the additive (s) and a thermoplastic polymer, the polymer being selected from the group consisting of polyolefin, polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone , Polyphenylene ether, polyphenylene ketone, Polyphenylene ether ketone, liquid crystalline polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene.

The nozzle plate is usually part of a spin pack, which consists of filter devices for the molten spinning mass and the downstream nozzle plate.

The temperature of the dope is to be chosen so that on the one hand sufficient fluidity of the dope is guaranteed, and on the other hand, the thermal stress of the polyketone remains limited, so that crosslinking and degradation reactions and gel formation in the dope to keep within limits or even completely suppressed can be.

In the first embodiment of the process according to the invention, an antioxidant-stabilized polyketone raw material and a selected further polymer derived from the masterbatch are used. Here, the temperatures of the spinning mass at the exit through the spinning capillary in the range of 200 to 300 ° C, preferably from 220 to 240 ° C, are. The diameter of a spinning capillary is selected by the skilled person according to the desired fiber weight. Typical diameters range from 10 m to 5 mm, monofilaments or bristles preferably from 0.1 to 1 mm. This information corresponds to the diameter of the hole on the exit side of the polymer mass.

Integrated in the spinning process are one or more draws with thermal effects that give the thread the desired end properties. The person skilled in the art knows such procedures. The filament is preferably drawn several times after spinning, in particular with a total draw ratio in the range from 1: 3 to 1:15, preferably in the range from 1: 4 to 1: 8. Particular preference is given to the draw step (s) at least a Relaxierstufe (fixing) on. The stretched filaments are thermally treated while maintaining the fiber tension, so that in

Filament can reduce built-in voltages. Subsequently, the filaments produced are fed to a suitable storage form, for example, wound up or cut into staple fibers in a cutting device.

In a second embodiment of the process according to the invention, a polymer blend of aliphatic polyketone and of polyolefin, polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystal polymer and / or further aliphatic polyketone by a conventional

Spinnenkapillare spun as described above or there are aliphatic polyketone on the one hand and polyolefin, polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone,

Polyphenylene ether ketone, liquid crystalline polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene on the other hand by a

Spinning capillary spun to produce multi-component filaments. Otherwise, the method of the second embodiment corresponds to

Procedure in the first embodiment of the method.

In the second embodiment of the process according to the invention, an antioxidant, preferably sterically hindered, may be present in the polymer components Phenol, to be present; but it can also be worked without the antioxidant.

Also in the second embodiment, the temperature of the dope is to be chosen so that on the one hand sufficient fluidity of the dope is ensured, and on the other hand, the thermal load of the aliphatic polyketone and the other polymer component remains limited, so that crosslinking and degradation reactions and gelation in the Spinnmasse be limited or even completely suppressed.

In the second embodiment of the process according to the invention, it is possible to use polymer raw materials which are not necessarily stabilized with antioxidant. Here, the temperatures of the spinning mass at the exit through the spinning capillary in the range of 200 to 300 ° C, preferably from 220 to 260 ° C, are.

In a third embodiment of the process according to the invention, a blend of aliphatic polyketone and of polysiloxane particles and / or of poly (meth) acrylate particles is spun through a conventional spinning capillary as described above.

The invention relates to a process for producing the polyketone fibers described above, comprising the following measures:

i) mixing of thermoplastic aliphatic polyketone with

a masterbatch containing hindered phenol and a

Polymer selected from the group consisting of polyolefin, polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone and / or liquid-crystalline polymer in an extruder to form a dope, ii) extruding the spinning mass from step i) through a die plate having one or more spinning capillaries, wherein the temperature of the spinning mass at the exit side of the spinning capillary (s) is in the range from 200 to 300 ° C., preferably from 220 to 260 ° C.,

iii) stripping the filament formed at a take-off speed in the range from 1 to 120 m / min, in particular from 5 to 50 m / min, preferably with a choice of the ratio of draw speed to exit speed of the spinning mass from the

Spinning capillary greater than 1,

iv) single or multiple stretching of the formed filament, v) optionally relaxation of the formed filament, and

vi) optionally winding or cutting the filament formed.

i) mixing of thermoplastic aliphatic polyketone and polyolefin, polyester, polyurethane, polyphenylene sulfide,

Polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone and / or liquid crystalline polymer in an extruder to form a dope,

ii) extruding the spinning mass from step i) through a die plate having one or more spinning capillaries, wherein the temperature of the spinning mass at the exit side of the spinning capillary (s) is in the range from 200 to 300 ° C., preferably from 220 to 260 ° C.,

Spinning capillary greater than 1,

iv) one or more stretching of the formed filament, v) optionally relaxing the formed filament, and

vi) optionally winding or cutting the filament formed.

The invention relates to a further process for the preparation of the polyketone fibers described above comprising the following measures:

ia) providing a first dope comprising thermoplastic aliphatic polyketone in a first extruder,

ib) providing a second dope containing polyolefin,

Polyester, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystalline polymer, further aliphatic polyketone, polyamide and / or polyoxymethylene in a second extruder, ii) extruding the first dope from step ia) and the second dope from step i) a nozzle plate having one or more spinning capillaries, so that each spinning capillary is flowed through by the first spinning mass and by the second spinning mass, the temperature of the first and second spinning masses being on the exit side of the spinning capillary (n) in the range of 200 to 300 ° C. , preferably from 220 to 260 ° C,

iii) stripping off the filament formed at a take-off speed in the range from 1 to 120 m / min, in particular from 5 to 50 m / min, preferably by selecting the ratio of draw speed to exit velocity of the spinning mass from the capillary greater than 1,

vi) optionally winding or cutting the filament formed.

The invention also relates to a process for the preparation of the polyketone fibers described above comprising the following measures: i) mixing thermoplastic aliphatic polyketone with a masterbatch comprising sterically hindered phenol and polysiloxane particles and / or from poly (meth) acrylate particles in an extruder to form a dope,

ii) extruding the spinning mass from step i) through a die plate having one or more spinning capillaries, the temperature of the spinning mass at the exit side of the spinning capillary (s) being in the range from 200 to 300 ° C., preferably from 220 to 260 ° C.

iii) stripping the formed filament with a

Withdrawal speed in the range of 1 to 20 m / min, in particular from 5 to 50 m / min, preferably with a choice of the ratio of take-off speed to

Exit velocity of the spinning mass from the spinning capillary of greater than 1,

iv) one or more hiding the filament formed, v) optionally relaxing the filament formed, and vi) optionally spooling or cutting the formed

Filament.

i) mixing thermoplastic aliphatic polyketone with polysiloxane particles and / or poly (meth) acrylate particles in an extruder to give a dope,

ii) extruding the spinning mass from step i) through a die plate with one or more spinning capillaries, wherein the temperature of the spinning mass on the exit side of the spinning capillary (s) is in the range from 200 to 300 ° C, preferably from 220 to 260 Stripping the formed filament with a

Take-off speed in the range of 1 to 120 m / min, in particular from 5 to 50 m / min, preferably with the choice of the ratio of take-off speed to

single or multiple stretching of the formed filament, optionally relaxation of the formed filament, and optionally spooling or cutting of the formed filament.

The fibers according to the invention, in particular in the form of monofilaments, are preferably used for the production of textile surface constructions, in particular of woven fabrics, spiral fabrics, laid or knitted fabrics. These textile surface constructions are preferably suitable for use in screens or conveyor belts. Another important field of application are fibers for brushing or for oral hygiene as well as for body care but also short cut fibers in composite materials with e.g. Concrete as

Matrix material.

The invention therefore also relates to textile fabrics comprising the fibers described above, in particular textile fabrics in the form of a woven, knitted, knitted, braided or laid fabric.

The fibers of the invention are characterized by a combination of outstanding mechanical properties, such as high tensile modulus and good loop and knot strength, excellent bending recovery, and very good sliding properties and high abrasion resistance. They can be used in a wide variety of fields. They are preferably used in applications in which increased wear and high mechanical stress, in particular in hot humid environments, can be expected. Examples of this are the use in

Screen fabrics and filter cloths for gas and liquid filters, in drying tapes, for example for the production of food or in particular of paper, and in brushes for cleaning purposes of all kinds, for example in the home, in personal care, such as in oral hygiene, e.g. as a toothbrush. Further uses are the use as fluidization belts, as process belts for the board industry, as conveyor belts and as process belts in the production of nonwovens, such as spunbond, meltblown, airlaid, wetlaid,

Spunlace, or Thermobonded, or as short-cut fibers for concrete or composite reinforcement. The invention also relates to the use of the fibers described above, in particular in the form of monofilaments, as papermachine clothing, in conveyor belts and in filtration screens.

In a further preferred embodiment, the fibers according to the invention are subjected to various stabilizers, e.g. Antioxidants to

Thermostabilization and / or hydrolysis stabilizers added. As a result, this variant is particularly suitable for drying processes in a humid environment, e.g. in the dryer section of paper machines as well as in other continuous industrial drying and filtration processes, such as the drying of particle board, of pellets to be used as fuels or more generally of biomass.

The fibers according to the invention are very particularly preferably used in the form of monofilaments as paper machine clothing in the sheet forming section and / or in the dryer section of the paper machine. These monofilaments are used, for example, in the deficit of forming fabrics in paper machines. This can be 100% as a deficit and / or as a so-called interchange (alternately the said

Monofilament alternating with e.g. Polyamide, polyester or polyphenylene sulfide monofilaments). The aliphatic polyketone causes a significant reduction in the sliding friction and thus a significant

Reduction of drive power of the paper machine, resulting in significant energy savings. Furthermore, the monofilament according to the invention is more resistant to abrasion than comparable monofilaments of polyethylene terephthalate, polybutylene terephthalate or polycyclohexane terephthalate or aus

Polyamides without the use of aliphatic polyketone.

The fibers according to the invention are particularly preferably used in the form of filtration fabrics or knitted fabrics as support for

Wide mesh membranes with high dimensional stability (e.g.

Support of reverse osmosis membranes, which must have a continuous pressure of 50 bar), and as a process fabric for the

Fabrication of paper and nonwovens.

In addition, the fibers of the invention are well suited for the production of conveyor belts, in which a combination of dimensional stability and good sliding properties is required. Another preferred field of application of the fibers according to the invention is their use in brushes, in particular in toothbrushes. Here, the fibers according to the invention are generally used in the form of bristles.

These are the monofilaments in endless or cut and to

Bundling combined form or as brushes before. The present invention will be described in more detail by the following examples. These examples are only illustrative of the invention and are not intended to be limiting.

In the following examples different aliphatic polyketones were used. The sheath polymers were of the M630A type having a melting point (according to ASTM D3418) of 222 ° C. or alternatively a low melting variant, such as the M410F type having a melting point (according to ASTM D3418) of 199 ° C. or as Type M620A with a melting point (according to ASTM D3418) of 207 ° C. The core polymers were, for example, a semi-crystalline PET (polyetheylene terephthalate) having a melting point of 254 ° C. or a polycarbonate (such as Makroion 2456 from Covestro) or a

high melting point aliphatic polyketone (type M630A from Hyosung) or a blend of these components.

Example 1 Combination of two commercially available aliphatic polyketones, a higher melting core type M630A from Hyosung Polyketone and a low melting in the shell type M410F from Hyosung Polyketone. To produce such a bicomponent monofilament, both components were coextruded in one production step. About the relative delivery rate, the core / shell ratio can be adjusted, which was 70/30 here. In the process, the monofilament was stretched several times under the influence of temperature. The total draw ratio was 1: 3.7. By the above process, a bicomponent monofilament having the following properties was obtained:

The combination of the two polyketone variants in a monofilament allows a thermally induced physical bond at monofilament crossover points. As a result, tissue structures have, for example, increased shear stability. Furthermore, such crosslinked structures show thickening at the crossing points. This property is due to positive

Flow characteristics e.g. for the liquid filtration of interest.

Example 2

Stabilized polyethylene terephthalate (PET) - 99.3% raw material grade 12 from Invista with 0.7% Stabaxol from Lanxess - in the core and an aliphatic polyketone type M630A from Hyosung Polyketone - was used in the mantle.

Such a monofilament was coextruded in one production step.

About the relative delivery rate, the core / shell ratio can be adjusted, which was 70/30 here. In the process, the monofilament was stretched several times under the influence of temperature. The total draw ratio was 1: 4.3 By the above process, a bicomponent monofilament having the following properties was obtained:

The combination of PET and aliphatic polyketone in a monofilament combines the usual properties of PET with the surface properties of polyketone. As a result, tissue structures can be produced, which have a significantly reduced coefficient of friction and thus can lead to energy savings when used for example in conveyor belts. The advantage of the PET core results from the analogous processing properties of the monofilament in the Webe process (eg identical

Floating).

Example 3

Aliphatic polyketone type M630A from Hyosung Polyketone was used as the matrix polymer. In addition, 1.0% by weight of polysiloxane beads - type PMSQ E + 580 from Coating Products - having an average diameter of 8 μm were dispersed in the matrix polymer.

The monofilament obtained has the following properties: Unit value

Diameter mm 0.6

Fineness dtex 3702

Strength cN / tex 40.4

Breaking elongation% 25,4

Thermal shrinkage (at% 14.7

180 ° C for 10 min)

As shown in EP 2 933 961 A1, the admixture of

Polysiloxankügelchen by the resulting surface structure of the

Monofilaments whose coefficient of friction against metal or ceramic. This is also the case in combination with aliphatic polyketone (cf.

table below). The monofilaments of Comparative Experiments V1 to V5 listed in the table are described below.

Example 4

The procedure was as in Example 3. The matrix polymer used was aliphatic polyketone type M630A from Hyosung Polyketone. The second polymer component used was a liquid-crystal polymer (LCP) -polyester of hydroxybenzoic acid and hydroxynaphthalene. carboxylic acid type Vectra A950 from Ticona added to 7%. The monofilament obtained showed the following properties:

The combination of polyketone with an LCP showed an increase in strength and a simultaneous increase in modulus of elasticity. This is due to a synergistic effect of LCP fibrils in the polyketone matrix

due. The increase of the modulus of elasticity is shown in the following table. The monofilaments listed in the table

Comparative experiments V1 to V2 will be described below.

Example No. 4 V1 V2

Module in kg / mm ² 15487 749 342

Comparative Examples V1 to V4

Aliphatic polyketone type M630A from Hyosung Polyketone was used at 100%.

To produce a monofilament, the polyketone was extruded, spun and stretched several times under the action of temperature.

Depending on the draw ratio, the following properties were obtained:

Comparative Example 5

A commercially available PET type RT 12 from Invista - 100% was used. The procedure was as in Comparative Examples V1 to V4. The monofilament obtained showed the following properties

Unit value

Diameter mm 0.6

Fineness dtex 3922

Strength cN / tex 36.2

Breaking elongation% 38,8

Thermal shrinkage (at% 3.6

180 ° C for 10 min)

Claims

claims

1. Melt-spun fibers containing as the first polymer

thermoplastic aliphatic polyketone and as a second polymer a polyolefin, polyester, polyurethane, polyphenylene sulfide,

Polyphenylene sulfone, polyphenylene ether, polyphenylene ketone,

Polyphenylenetherketeton, liquid crystalline polymer and / or aliphatic polyketone, wherein in the event that aliphatic

Polyketone is present as the second polymer whose melting point is at least 5 ° C higher than the melting point of the aliphatic polyketone of the first polymer.

2. Melt-spun fibers containing thermoplastic

aliphatic polyketone as the first polymer and polyolefin, polyester, polyamide, polyoxymethylene, polyurethane, polyphenylene sulfide,

Polyphenylene sulfone, polyphenylene ether, polyphenylene ketone,

Polyphenylene ether ketone, liquid crystalline polymer and / or aliphatic polyketone as the second polymer, wherein the polymers are in the form of two or more fiber components spatially separated from each other but contiguously arranged, and in the case of containing aliphatic polyketone as the second polymer, its melting point at least

5 ° C higher than the melting point of the aliphatic polyketone of the first polymer.

3. Melt-spun fibers containing thermoplastic

aliphatic polyketone as a matrix polymer and particles of polysiloxanes or poly (meth) acrylates dispersed therein.

4. Melt-spun fibers according to any one of claims 1 to 3, characterized in that the thermoplastic aliphatic polyketone is an ethylene / propylene / CO terpolymer.

5. Melt-spun fibers according to at least one of claims 1 to 4, characterized in that the fiber contains an antioxidant, preferably a hindered phenol, which is optionally combined with co-stabilizers.

6. melt-spun fibers according to any one of claims 1 or 2, characterized in that the polyester is an aromatic-aliphatic polyester homo- or copolymer, in particular a polyethylene terephthalate homopolymer or a copolymer containing ethylene terephthalate.

7. melt-spun fibers according to any one of claims 1 or 2, characterized in that the polyester is a polycarbonate.

8. melt-spun fibers according to at least one of claims 1 or 4 to 7, characterized in that the first polymer and the second polymer are present as a polymer mixture, wherein one of the polymers forms a matrix and the other polymer is dispersed in the form of fibrils in the matrix ,

Melt-spun fibers according to claim 8, characterized in that the fibers are in the form of islet-in-sea fibers in which a polymer component in the form of fibrils is arranged in a polymeric matrix component.

10. Melt-spun fibers according to at least one of claims 2 or 4 to 7, characterized in that they are used as core Sheath fibers having an aliphatic polyketone sheath and having a core of polyolefin, polyester, polyamide, polyoxymethylene, polyurethane, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether, polyphenylene ketone, polyphenylene ether ketone, liquid crystal polymer and / or another aliphatic polyketone are present.

11. Melt-spun fibers according to claim 10, characterized in that they are in the form of core sheath fibers with a sheath of aliphatic polyketone and with a core of polyester,

Polyphenylene sulfide, polyphenylene ether, polyphenylene ketone,

Polyphenylene ether ketone or another aliphatic polyketone.

12. Melt-spun fibers according to claim 2, characterized in that they comprise as side-by-side fibers with a fiber part of aliphatic polyketone and with another fiber part in contact therewith of polyolefin, polyester, polyamide, polyoxymethylene, polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether , Polyphenylene ketone, polyphenylene ether ketone, liquid crystal

Polymer and / or another aliphatic polyketone present.

13. Melt-spun fibers according to claim 12, characterized in that they are provided as side-by-side fibers with a fiber part of aliphatic polyketone and with another fiber part made of polyester, polyphenylene sulfide, in contact therewith,

Polyphenylene ether, polyphenylene ketone or polyphenylene ether ketone.

14. Melt-spun fibers according to at least one of claims 2 or 4 to 7 or 10 to 1, characterized in that they are formed as core-sheath fibers, a sheath thermoplastic ethylene / propylene / CO terpolymer and a core of polyolefin, polyester, polyamide, polyoxymethylene,

Polyphenylene sulfide, polyphenylene sulfone, polyphenylene ether,

Polyphenylene ketone, polyphenylene ether ketone, liquid crystalline

Polymer and / or further aliphatic polyketone, wherein the mass of the shell 5 to 50 wt .-% and the mass of the core is 95 to 5 wt .-%, and wherein the core and / or the shell, if necessary, a total of up to 10th % By weight of additives, in particular sterically hindered phenol, UV stabilizers, pigments, dyes, fillers, matting agents, crosslinking agents, crystallization accelerators, lubricants,

Flame retardants, antistatic agents, hydrolysis stabilizers, plasticizers, impact modifiers and / or fluoropolymers, wherein the

Percentages refer to the total mass of the fibers.

15. Melt-spun fibers according to at least one of claims 1 to 14, characterized in that they are present as monofilaments in continuous or cut and bundled to form bundles or brushes.

16. Textile fabrics containing the melt-spun fibers according to at least one of claims 1 to 15 in the form of a

Fabrics, knitted fabrics, knitted fabrics, meshes or loops.

17. Use of the melt spun fibers after at least

one of claims 1 to 15 for use in screen fabrics, in filter cloths for gas and liquid filters, in process belts and dry belts and in brushes for cleaning purposes of all kinds.

18. Use according to claim 17, characterized in that the melt-spun fibers are used as fluidization bands, as process strips for the cartonboard industry, are used as conveyor belts and as process belts in the production of nonwovens.

19. Use according to claim 17, characterized in that the melt-spun fibers are used in brushes for cleaning purposes in the home or in personal care, in particular in toothbrushes.

20. Use according to claim 17, characterized in that the melt-spun fibers are used as short-cut fibers for concrete and Kompositarmierung.

21. Use according to claim 17, characterized in that the melt-spun fibers are used in the form of monofilaments as paper machine clothing, in conveyor belts and in filtration sieves.

22. Use according to claim 17, characterized in that the melt-spun fibers are used in the form of bristles in brushes, in particular in toothbrushes.