Poly (1,4-cyclohexanedimethylene terephthalate) multifilament yarns for technical applications and production thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 21, 1996
Grant Date -
N/A
app pub date -
Nov 29, 1994
filing date -
Dec 1, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully