Plastics foam and method of manufacturing same

Details Plastics foam and method of manufacturing same Plastics foam and method of manufacturing same

1997-10-31

2000-10-03

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 75, 521 79, 521 80, 264 458, 264 459, 264 462, 264 463, 264 50, 264 51, 264 54, C08J 930

Patent

active

061274402

ABSTRACT:
A method of producing an extruded plastics foam of enhanced physical strength includes intimately mixing a blowing agent incorporation CO.sub.2, the major portion of which is a natural gas, in a plastics resin melt to form a homogenous resin mix, and extruding the resin mix through an exit die into a region of lower pressure. At the point of extrusion out of the exit die, the temperature of the resin mix is adjusted so that it is below the critical temperature.

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