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1. (WO2001038620) METHOD FOR COOLING A TWISTED FILAMENT YARN

Pub. No.:    WO/2001/038620    International Application No.:    PCT/CH2000/000630
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Sat Nov 25 00:59:59 CET 2000
IPC: D02G 1/02
D02J 13/00
Applicants: MASCHINENFABRIK RIETER AG
MEYER, Urs
RETECH AKTIENGESELLSCHAFT
MACCABRUNI, Davide
Inventors: MEYER, Urs
MACCABRUNI, Davide
Title: METHOD FOR COOLING A TWISTED FILAMENT YARN
Abstract:
The false twisting texturing process, for a thermoplastic filament yarn (1), is carried out in the texturing zone (2), by means of a heating zone (3), a cooling zone (4) and a twisting device (5). The yarn is rendered plastically deformable during the pass thereof through the heating zone (3) and is simultaneously given a genuine twist (7). In the following cooling zone (4), the yarn (1) is recooled in the twisted form. After the pass through the twisting unit (5), the above twist in the yarn structure is lost and remains merely as an internal tension in the textured yarn (6). The cooling of the yarn is achieved by means of the addition of a cooling fluid (8), which is measured out by a regulated dosing pump (11), in such a way that a non-vaporised portion (10) thereof reaches the twisting unit (5), where it assists the transfer of the twist.