High melt index polystyrene foam and method

Details High melt index polystyrene foam and method High melt index polystyrene foam and method

1991-07-24

1994-02-15

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

521 79, 521 97, 521146, C08J 908

Patent

active

052864294

ABSTRACT:
A polystyrene resin in foam form having a basis weight of less than about 20 g/100 in.sup.2 and a density of about 6 lbs./ft.sup.3 or less, the foam precursor of which is either a polystyrene having a melt index of about 8 or more or a polystyrene in combination with a minor proportion of any other material which will result in a melt index of about 8 or more. A method of forming such a polystyrene resin foam structure includes combining the resin in molten form under pressure with the blowing agent of at least approximately 100% carbon dioxide and extruding the mixture through a die into an atmosphere of reduced pressure to form the foam structure.

REFERENCES:
patent: 3431164 (1969-03-01), Gilbert
patent: 4198363 (1980-04-01), Noel
patent: 4344710 (1982-08-01), Johnson
patent: 4470938 (1984-09-01), Johnson

Affiliated with

Also associated with

Rating

High melt index polystyrene foam and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High melt index polystyrene foam and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High melt index polystyrene foam and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1204651