Process for the production of foam materials on polyolefin basis

Details Process for the production of foam materials on polyolefin basis Process for the production of foam materials on polyolefin basis

1979-10-26

1981-03-10

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

260 23, 260 4R, 2604AR, 260 5, 260724, 264140, 264DIG7, 264DIG18, 264DIG69, 521 54, 521 57, 521134, 521139, 521140, 521143, 521144, 521149, 525194, 525197, 525198, 525227, 525232, 525240, 525241, B29H 720, C08J 922

Patent

active

042553725

ABSTRACT:
A process for the production of polyolefin foam materials from crosslinked polyolefin foam scraps includes the steps of comminuting scraps of crosslinked polyolefin-containing foam; admixing the comminuted scraps with a synthetic resin on a polyolefin basis; compressing the resulting admixture at a temperature lying below the decomposition temperature of the crosslinking agent to form an aggregate product; comminuting this product to form a particulate material; plasticizing the particulate material at a temperature lying below the decomposition temperature of the crosslinking agent to form a shaped article; and crosslinking and expanding, i.e. foaming, the shaped article by heating the article to above the decomposition temperatures of the crosslinking agent and of the blowing agent. The foam scraps are obtained from a foam article produced by mixing a polyolefin or a blend of a polyolefin with an elastomer and/or synthetic resins with an organic peroxide crosslinking agent and a particulate blowing agent, the decomposition temperature of the crosslinking agent being below the decomposition temperature of the blowing agent, and optionally with customary additives; by forming the mixture, at a temperature lying below the decomposition temperatures of the crosslinking agent and the blowing agent, into a shaped article; and by subsequently crosslinking and expanding, i.e. foaming, this shaped article with the application of heat to above the decomposition temperatures of the crosslinking agent and the blowing agent.

REFERENCES:
patent: 3098832 (1963-07-01), Pooley et al.
patent: 3655542 (1972-04-01), Tamai et al.
patent: 3812225 (1974-05-01), Hosoda et al.
patent: 3823213 (1974-07-01), Stastuy et al.

Affiliated with

Also associated with

Rating

Process for the production of foam materials on polyolefin basis 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 the production of foam materials on polyolefin basis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of foam materials on polyolefin basis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1293901