Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1990-10-30
1992-04-21
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
106122, 521 40, 521 49, 521 841, 5211091, 521155, 523218, C08J 9236, C08J 924
Patent
active
051068800
ABSTRACT:
A plastic foam material comprises an aggregate of discrete elements made of substantially individual cellulose fibers combined with a cellulose starch and including a plurality of bubbles produced by a gas-generating agent. The discrete elements are suspended in a matrix also including a plurality of bubbles produced by a gas-generating agent. In a preferred embodiment the matrix is also made of substantially individual cellulose fibers combined with a cellulose starch and formed into a geometric shape. In another preferred embodiment the discrete aggregate elements are substantially closed-cell foam and the matrix is substantially open-cell foam. In yet another preferred embodiment the discrete aggregate elements are substantially closed-cell, and the foam matrix is also substantially closed-cell.
REFERENCES:
patent: 4734439 (1988-03-01), Reischl
patent: 4758466 (1988-07-01), Dabi et al.
patent: 4801621 (1989-01-01), Reischle
patent: 4843105 (1989-06-01), Reischl et al.
Miller Jack V.
Miller Ruth E.
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