Abstract: Textile fabric composed of synthetic fibers is subjected to a gas phase fluorination in a fluorine/inert gas atmosphere having a fluorine concentration in the range from 0.1 to 10% in order that the synthetic fiber surfaces may be activated in such a way that they are able to react with organic or inorganic compounds. Thereafter, the fabric is coated with a fluorocopolymer which is free of adhesion promoters. Similarly, yarn composed of synthetic fibers is first gas phase fluorinated and thereafter coated with a fluorocopolymer. Sewing yarn or thread, having been gas phase fluorinated, is bonded by means of a fluoropolymer coating. The improved adhesion makes the coated materials useful for a wide range of industrial applications.

Abstract: Textile fabric composed of synthetic fibers is subjected to a gas phase fluorination in a fluorine/inert gas atmosphere having a fluorine concentration in the range from 0.1 to 10% in order that the synthetic fiber surfaces may be activated in such a way that they are able to react with organic or inorganic compounds. Thereafter, the fabric is coated with a fluorocopolymer which is free of adhesion promoters. Similarly, yarn composed of synthetic fibers is first gas phase fluorinated and thereafter coated with a fluorocopolymer. Sewing yarn or thread, having been gas phase fluorinated, is bonded by means of a fluoropolymer coating. The improved adhesion makes the coated materials useful for a wide range of industrial applications. Textile fabric composed of synthetic fibers is subjected to a gas phase fluorination in a fluorine/inert gas atmosphere having a fluorine concentration in the range from 0.

Abstract: The present invention provides a flammability multifilament yarn comprising a polyester formed from dicarboxylic acid and diol components which contains, in the polymer chain, units of the formula I ##STR1## where R is a saturated open-chain or cyclic alkylene, arylene or aralkylene radical, andR.sup.1 is an alkyl radical of up to 6 carbon atoms or an aryl or aralkyl radical,wherein the yarn has a tenacity of at least 65 cN/tex, a total burn time, when made into a loomstate cloth and subjected to the flammability test of DIN 4102/B2, which is at least 5 times shorter than that of a comparable loomstate cloth composed of non-phosphorus-modified polyester, and wherein the yarn has no afterburning on 3 and 15 sec flaming according to DIN 54336 and 3 sec flaming according to DIN 54333.

Abstract: A high hydrolysis and aminolysis resistance multifilament yarn composed of a polymer based on poly(1,4-cyclohexanedimethylene terephthalate), wherein at least 85 mol % of the diol-derived groups of the polyester are 1,4-cyclohexanedimethylene groups, characterized by a tenacity of above 40 cN/tex, a dry heat shrinkage S.sub.200 of below 10% and a post hydrolysis or aminolysis treatment strength of at least 85% of the original strength. A process for producing this multifilament yarn comprises maintaining the temperature of the melt at from 295.degree. to 305.degree. C., taking off the filaments at a spinning take-off speed of below 1500 m/min, drawing the spun filaments continuously or batchwise in at least two stages using a defined draw ratio and defined temperatures in every stage, and subjecting the drawn filaments to a setting and relaxing treatment at temperatures above 230.degree. C.

Abstract: A process for producing fiber from polyarylene sulfide, by melt spinning a polyarylene sulfide into a gas, cooling the spun filaments with a blown gas, taking the filaments off at a high speed, storing the spun filaments, drawing the spun filaments in two stages and after treatment stage, and immediately thereafter heat setting the drawn filaments. Fibers produced by the invention have excellent mechanical properties including tensile strength and transverse strength, and the process is very efficient.

Abstract: A process produces fibers from polymers which give off troublesome gases and/or vapors during spinning, comprising the steps of:a) extruding the molten polymer through a spinneret into a closed spinning shaft,b) quenching the resulting filaments in the spinning shaft with a gas,c) taking off the resulting filaments from the spinning shaft,d) conducting the quench gas away from the spinning shaft and introducing it into a gas purification system ande) purifying the used quench gas by contact with an adsorbent for said troublesome gases and/or vapors.It is possible by the present invention to keep hazardous gases occurring during the spinning of polymers away from the surroundings and to dispose of them. Suitable polymers are in particular polyphenylene sulfides.