Abstract: An improved process is provided for simultaneously drawing and false-twist texturing of partially oriented polyester yarn. The process is of the type wherein the yarn from a supply source is passed through a yarn feed system; a heating zone in which the yarn is heated to a temperature of from about 175.degree. to about 235.degree. C; a cooling zone in which the yarn is cooled to a temperature below about 80.degree. C; a false-twisting means; and take-up means whereby the yarn is drawn to a desired draw ratio; to winding up means; and is characterized in that the yarn emerging from said heating zone and before entering said cooling zone is passed through a heat-maintenance zone, in which the yarn is maintained at a temperature and for a time sufficient to permit substantially complete crystallization of the yarn so that the fully-drawn textured yarn product has a tenacity of at least 3.5 gram per denier. Apparatus for carrying out said improved process is also provided.

Abstract: A method of improving the sorption capacity of a substantially hydrophobic, thermoplastic polymer, which comprises introducing into the polymer a halogen by contacting the polymer with a solution containing the halogen under conditions which avoid chemical reaction of the halogen with the polymer, separating the free halogen-containing polymer from the solution, and contacting the polymer with a reagent which pervades the polymer and reacts with the free halogen contained therein so as to produce a gas as one of the reaction products. The product polymers have increased sorption capacity and improved dyeability and are capable of sorbing and retaining useful substances such as medicaments, pesticides and perfumes.

Abstract: Novel chloro-brominated sulfurated lignin products obtained by chlorobromination of wood pulp waste liquors, having a total halogen content of from about 18 to about 40% by weight and a w:w Br:Cl ratio of from about 1:1 to about 5:1. The novel substances are used for flame proofing inflammable materials.