Claims
- 1. Method of making friction texturized polyester filament yarn, said method comprising the step of texturizing a flat yarn with a titre of 400 to 600 dtex at a rate of at least 350 m/min and a yarn tension ratio, F2/F1, less than one via a squeezing twister to form a friction texturized polyester filament yarn having a titre of 400 to 600 dtex and a crimpability of at least 45%, wherein said F2 and said F1 are yarn tensions in said yarn immediately downstream and upstream of said squeezing twister respectively.
- 2. Method of making a set yarn comprising the steps of:
- a) texturizing a flat yarn with a titre of 400 to 600 dtex at a rate of at least 350 m/min and a yarn tension ratio, F2/F1, less than one via a squeezing twister to form a friction texturized polyester filament yarn having a titre of 400 to 600 dtex and a crimpability of at least 45%, wherein said F2 and said F1 are yarn tensions in said yarn immediately downstream and upstream of said squeezing twister respectively, and
- b) heating said friction texturized polyester filament yarn having said titre of 400 to 600 dtex and said crimpability of at least 45% to form a set yarn of 400 to 600 dtex titre and a crimp of from 22.5 to 29.9%.
- 3. Method as defined in claim 2, wherein said heating of said friction texturized polyester filament yarn is performed at a temperature of from 210.degree. to 240.degree. C.
- 4. Method as defined in claim 2, wherein said crimp of said set yarn is 29%.
- 5. Method as defined in claim 2, wherein said crimp of said set yarn is 29.9%.
- 6. Method as defined in claim 2, wherein said crimp of said set yarn is 29.5%.
- 7. Method as defined in claim 2, wherein said crimp of said set yarn is 26.2%.
- 8. Method as defined in claim 2, wherein said crimp of said set yarn is 23.5%.
- 9. Method as defined in claim 2, wherein said crimp of said set yarn is 22.5%.
Priority Claims (1)
Number |
Date |
Country |
Kind |
01095/89 |
Mar 1989 |
CHX |
|
BACKGROUND OF THE INVENTION
The following application is a continuation-in-part of U.S. patent application Ser. No. 07/613,776, filed Nov. 16, 1990, now abandoned.
US Referenced Citations (22)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0427805 |
May 1994 |
EPX |
Non-Patent Literature Citations (2)
Entry |
DIN 53 840, Nov. 1983, Bestimmung von Kraueselkennwerten an texturierten Filamentgarnen, Parts 1 & 2, pp. 213-222. |
Klaus Fisscher, "Ein Beitrag Zur Torsions-und Streck-Texturierung", Nov. 27, 1978, pp. 120-121. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
613776 |
Nov 1990 |
|