Process for extruding a partially foamed thermoplastic product

Details Process for extruding a partially foamed thermoplastic product Process for extruding a partially foamed thermoplastic product

1973-10-09

1976-05-11

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 53, 264172, 264211, 264349, 264DIG5, B29D 2700, B29F 302

Patent

active

039564380

ABSTRACT:
Process for producing a partially foamed thermoplastic polymer product in a single screw extruder by dividing an initial melt stream of the polymer into separate partial melt streams conveyed individually by the extruder to a shaping or forming die, uniformly mixing a foaming agent with at least one but not all of the separate and individually conveyed partial melt streams, and then rejoining all of said melt streams in the die in abutting core and shell layers with foaming of at least one but not all of said layers.

REFERENCES:
patent: 2750627 (1956-06-01), Gray
patent: 2836851 (1958-06-01), Holt
patent: 2848739 (1958-08-01), Henning
patent: 2871516 (1959-02-01), Sherman et al.
patent: 3229005 (1966-01-01), Reifenhauser
patent: 3331900 (1967-07-01), Thomas
patent: 3360824 (1968-01-01), Schippers
patent: 3555128 (1971-01-01), Schrenk
patent: 3557265 (1971-01-01), Chisholm et al.
patent: 3745200 (1973-07-01), Geyer
patent: 3767742 (1973-10-01), Robin
patent: 3773877 (1973-11-01), Baker et al.
patent: 3773882 (1973-11-01), Schrenk
patent: 3782870 (1974-01-01), Schippers
patent: 3857914 (1974-12-01), Aishima et al.

Affiliated with

Also associated with

Rating

Process for extruding a partially foamed thermoplastic product 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 extruding a partially foamed thermoplastic product, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for extruding a partially foamed thermoplastic product will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1303926