Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1972-01-24
1976-10-05
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264148, 264151, 264210F, 264DIG47, B29H 718
Patent
active
039845141
ABSTRACT:
A process is disclosed for producing extremely fine polyamide/polystyrene fibers which include the steps of forming a molten blend consisting of from about 35 weight percent up to about 45 weight percent of a polyamide, preferably polycaprolactam and, correspondingly, from about 65 weight percent down to about 55 weight percent of a polystyrene, forcing this molten blend through an extrusion die to form a structure such as a strand, monofilament, sheet or film, melt drawing the extruded structure at a draw ratio of at least 4:1 to orient the same and thereby obtain a fibrillatable structure, and thereafter mechanically fibrillating the oriented, fibrillatable structure by cold drawing whereby the structure spontaneously and completely breaks up into extremely fine polyamide/polystyrene fibers. The blend may optionally additionally contain up to about 15 weight percent of an ethylene/acrylic acid copolymer containing about 20 weight percent acrylic acid.
REFERENCES:
patent: 2327087 (1943-08-01), Austin
patent: 2954587 (1960-10-01), Rasmussen
patent: 3099067 (1963-07-01), Merriam et al.
patent: 3336174 (1967-08-01), Dyer et al.
patent: 3359344 (1967-12-01), Fukashima et al.
patent: 3382305 (1968-05-01), Breen
patent: 3402548 (1968-09-01), Winninger et al.
patent: 3423888 (1969-01-01), Brown
patent: 3499822 (1970-03-01), Rasmussen
patent: 3505429 (1970-04-01), Press
patent: 3516961 (1970-06-01), Robb
patent: 3539662 (1970-11-01), Hill et al.
patent: 3576931 (1971-04-01), Chopra et al.
patent: 3608042 (1971-09-01), Rasmussen
patent: 3645085 (1972-02-01), Rassart
Anderson Raymond Paul
Galiano Francis Ross
Gulf Research & Development Company
Kelly Richard L.
Woo Jay H.
LandOfFree
Process for producing fine polyamide/polystyrene fibers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for producing fine polyamide/polystyrene fibers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing fine polyamide/polystyrene fibers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-655533