Title:
COMPOSITE POLYPROPYLENE FILAMENT
United States Patent 3509013
Inventors:
Oppenlander, George C.
Publication Date:
04/28/1970
Other Classes:
264/172.140, 428/394, 264/172.150, 264/172.180, 264/168
International Classes:
D01D5/30; D01F8/06; D02G1/00
US Patent References:
| 3399259 | Method for producing bicomponent polypropylene filaments | | | |