Claims
- 1. An undrawn polyester yarn prepared by a process which comprises:
- melting a polyester containing 0.2 to 10% by weight of a finely divided and uniformly dispersed polymer consisting of units represented by the following formula (1): ##STR3## wherein R.sub.1 and R.sub.2 is each a substituent consisting of atoms selected from the group consisting of C, H and O atoms, with the proviso that R.sub.1 and R.sub.2 are not phenyl or substituted phenyl and that the sum of the molecular weight of R.sub.1 and R.sub.2 is at least 40, and n is a positive integer;
- spinning the melt from a spinneret, and taking up the spun yarn at a speed of between 1500 and 8000 n/min.
- 2. An undrawn polyester yarn according to claim 1, wherein the content of the polymer represented by the formula (1) is 0.5 to 6% by weight.
- 3. An undrawn polyester yarn as set forth in claim 1, having an elongation increase ratio (I) of at least 15%.
- 4. An undrawn polyester yarn as set forth in claim 1, wherein in the formula (1), R.sub.1 is H or an alkyl group having up to 5 carbon atoms and R.sub.2 is a carboxylic acid ester represented by the formula ##STR4## in which R.sub.3 is an alkyl group having 1 to 5 carbon atoms.
- 5. An undrawn polyester yarn as set forth in claim 4, wherein R.sub.1 stands for an alkyl group having up to 5 carbon atoms.
- 6. An undrawn polyester yarn as set forth in claim 5, wherein the polymer represented by the formula (1) is poly (methyl methacrylate).
Priority Claims (1)
Number |
Date |
Country |
Kind |
55-121211 |
Sep 1980 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 299,064, filed Sept. 3, 1981, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (3)
Number |
Date |
Country |
47-15916 |
May 1972 |
JPX |
49-034744 |
Sep 1974 |
JPX |
1183086 |
Mar 1970 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
299064 |
Sep 1981 |
|