Apparatus for and method of making foam articles having densifie

Details Apparatus for and method of making foam articles having densifie Apparatus for and method of making foam articles having densifie

1980-07-17

1981-12-08

Anderson, Philip

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

264 454, 264 455, 264 51, 264DIG10, 264DIG11, 264DIG83, 425 4R, 4283105, 4283166, 521146, 521918, B29D 2700

Patent

active

043048102

ABSTRACT:
Low density, lightweight foam articles may be provided with certain portions or regions thereof, that are reinforced, having higher density and strength, obtained by compression of the foam in these locations, during or after formation of the foam. Such locations may be made sufficiently strong and dense to allow the article to be attached in place by fastening means, imbedded therein. The increase in density can be as much as from 5 pcf to 10 pcf or higher, depending upon the particular application.
Many foam materials, capable of being molded, extruded, or otherwise shaped to a predetermined configuration, may be made with this combination of high and low density, including foams of styrenic polymer or copolymer compositions, urethanes, vinyls, and even non-thermoplastic based materials, such as phenolic foams.

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