Fiber produced by means of a melt spinning method

Abstract

The present invention relates to a fiber which is produced by means of a melt spinning method, including a first component including a melt processable, fully fluorinated first polymer, and a second component including a thermoplastic second polymer.

What is claimed is: 
     
         1 . A fiber which is produced by means of a melt spinning method, including a first component including a melt processable, fully fluorinated first polymer, and a second component including a thermoplastic second polymer. 
     
     
         2 . The fiber according to  claim 1 , wherein the first polymer is a copolymer of tetrafluoroethylene and at least one fully fluorinated comonomer, wherein the comonomer content amounts to approximately 1 mole % or less. 
     
     
         3 . The fiber according to  claim 2 , wherein the comonomer is selected from hexafluoropropylene, perfluoroalkyl vinyl ethers and perfluoro-(2,2-dimethyl-1,3-dioxole). 
     
     
         4 . The fiber according to  claim 1 , wherein the first polymer has an amorphous content of at least 50%. 
     
     
         5 . The fiber according to  claim 1 , wherein the second polymer is selected from polyethylene terephthalate, polybutylene terephthalate, polyamides, polyimides, polyether ketones, polyphenylene sulfide or mixtures thereof. 
     
     
         6 . The fiber according to  claim 1 , wherein the fiber is formed from a compound which includes approximately 20 to approximately 80 weight % of the first polymer and approximately 20 to approximately 80 weight % of the second polymer. 
     
     
         7 . The fiber according to  claim 1 , wherein the first and the second component form regions of the fiber that are spatially separated from one another. 
     
     
         8 . The fiber according to  claim 7 , wherein the first component of the fiber consists substantially entirely of the first polymer, or comprises a compound of the first polymer with one or more further polymers and/or one or more fillers. 
     
     
         9 . The fiber according to  claim 7 , wherein the fiber is a multifilament including filaments of the first polymer, which form the first component, and filaments of the second polymer, which form the second component. 
     
     
         10 . The fiber according to  claim 9 , wherein the multifilament includes approximately 10 to approximately 150 filaments, wherein approximately 20% to approximately 80% of the filaments are formed form the first polymer and approximately 20% to approximately 80% of the filaments are formed from the second polymer. 
     
     
         11 . The fiber according to  claim 7 , wherein the fiber is a monofilament in which the first and the second component respectively extend in the direction of the fiber and are connected to one another by an adhesive bond, or is a multifilament having a plurality of such monofilaments as the filaments. 
     
     
         12 . The fiber according to  claim 11 , wherein, within the monofilament, the first and the second component are arranged next to one another, as seen in cross section. 
     
     
         13 . The fiber according to  claim 11 , wherein the first or the second component forms the core of the monofilament and the other component forms a jacket surrounding the core. 
     
     
         14 . The fiber according to  claim 11 , wherein the first component, with the first polymer, forms approximately 5 to approximately 95 weight % of the monofilament, and the second component, with the second polymer, forms approximately 95 to approximately 5 weight %. 
     
     
         15 . The fiber according to  claim 1 , wherein the fiber or the filaments thereof have a regular cross-sectional profile. 
     
     
         16 . The fiber according to  claim 1 , wherein the fiber or the filaments thereof have a fineness of approximately 1 to approximately 1000 dtex. 
     
     
         17 . The fiber according to  claim 1 , wherein the fiber has a tear strength of approximately 4 to approximately 200 cN/tex. 
     
     
         18 . The fiber according to  claim 2 , wherein the comonomer content is from approximately 0.1 mole % to approximately 1 mole %. 
     
     
         19 . The fiber according to  claim 15 , wherein the fiber or the filaments thereof have a circular, oval or polygonal cross-sectional profile. 
     
     
         20 . The fiber according to  claim 16 , wherein the fiber or the filaments thereof have a fineness of approximately 2 to approximately 100 dtex.