EP 0052845 B1 19840125 - STRETCHING IN WATER
Title (en)
STRETCHING IN WATER
Publication
Application
Priority
DE 3044073 A 19801124
Abstract (en)
[origin: US4418032A] Polyesters are drawn in the form of thick tows in a predrawing and a main drawing step. Predrawing is carried out at 71 DEG -90 DEG C. in water, and the predraw ratio is chosen in such a manner that the main drawing can be carried out at a minimum of draw tension. Between predrawing and main drawing, the tows cool to below 40 DEG C. Suitable draw ratios for the predrawing are from 1:1.05 to 1:1.6. The main drawing is carried out either in steam or hot water. FIG. 2 shows the curve of draw tension in the main drawing step as function of the draw ratio in the predrawing: there is a distinct minimum.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
D01D 5/12 (2013.01 - EP US); D01F 6/62 (2013.01 - EP US); Y10S 264/28 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0052845 A1 19820602; EP 0052845 B1 19840125; AT E5979 T1 19840215; DE 3044073 A1 19820708; DE 3162051 D1 19840301; US 4418032 A 19831129
DOCDB simple family (application)
EP 81109691 A 19811114; AT 81109691 T 19811114; DE 3044073 A 19801124; DE 3162051 T 19811114; US 32273081 A 19811119