MELT-SPINNING METHOD AND MELT-SPINNING APPARATUS FOR PRODUCING A CRIMPED YARN

摘要

A melt-spinning method and a melt-spinning apparatus produce a crimped yarn. In this case, by spinning of a plurality of filaments, at least one filament bundle is generated from a thermoplastic polymer, is cooled and drawn and is compressed by means of an air stream in a stuffing chamber into a yarn plug, the yarn plug being opened up into a crimped yarn and being wound into a bobbin. So that the tendency to shrinkage and the crimp resistance on the crimped yarn can be set independently of one another, before compression, the drawn filament bundle is heated, in a first heat treatment for expansion, to a relaxation temperature and, in a second heat treatment for preliminary thermo control, to a crimping temperature. For this purpose, at least one further treatment means for the heat treatment of at least one filament bundle before entry into the stuffing chamber is provided between a drawing device a texturing device.

主权项

1. A melt-spinning method for producing a crimped yarn, in which at least one filament bundle is generated from a thermoplastic polymer by the spinning of a plurality of filaments, in which, after cooling, the filament bundle is drawn and is compressed by means of a thermally controlled air stream in a stuffing chamber into a yarn plug, and in which the yarn plug is opened up into a crimped yarn and wound into a bobbin, wherein, before compression, the drawn filament bundle is heated, in a first heat treatment of expansion, to a relaxation temperature and, in a second heat treatment for preliminary thermo control, to a crimping temperature.