Expansion of shrunk foam particles of propylene polymers

Details Expansion of shrunk foam particles of propylene polymers Expansion of shrunk foam particles of propylene polymers

1990-07-06

1991-09-03

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264321, 521 58, 521142, 521143, 521918, B29C 6720

Patent

active

050452568

ABSTRACT:
Foam particles of propylene polymers which have shrunk from 40 to 95% of their original volume and have a bulk density of from 10 to 30 g/1 can be expanded if they are treated with air or nitrogen under superatmospheric pressure, subsequently decompressed. If desired post-foamed by heating and, after aging, re-treated with air or nitrogen under superatmospheric pressure, subsequently decompressed and aged under atmospheric pressure until the pressure in the cells has dissipated.

REFERENCES:
patent: 3725320 (1973-04-01), Wang
patent: 4631159 (1986-12-01), Maeda et al.
patent: 4698191 (1987-10-01), Endo et al.
patent: 4702868 (1987-10-01), Pontiff et al.
patent: 4704239 (1987-11-01), Yoshimura et al.

Affiliated with

Also associated with

Rating

Expansion of shrunk foam particles of propylene polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Expansion of shrunk foam particles of propylene polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expansion of shrunk foam particles of propylene polymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1007524