Biodisintegrable thermoplastic resin foam and a process for prod

Details Biodisintegrable thermoplastic resin foam and a process for prod Biodisintegrable thermoplastic resin foam and a process for prod

1990-12-19

1992-05-05

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264 54, 521 79, 521134, 521138, 521139, 521140, 521916, C08J 910, C08J 914

Patent

active

051108380

ABSTRACT:
A biodisintegrable thermoplastic resin foam and a process for producing same are disclosed, the biodisintegrable thermoplastic resin foam being comprised as a substrate thereof a mixed resin comprising 5-40 weight % of a thermoplastic resin decomposable by microorganisms and 95-60 weight % of a thermoplastic resin not decomposable by microorganisms and being characterized in that the individual aerial cells constituting the foam have an average cell wall thickness of 1-100 .mu.m and an apparent density of 0.5 g/cm.sup.3 or less than 0.5 g/cm.sup.3. The biodisintegrable thermoplastic resin foam is easily disintegrable after disposal in an environment where microorganisms exist so that it can be reduced in bulkness and gives no harmful effect on the life of natural plant and animals. The foam incorporated with a filler can be promoted in disintegration by microorganisms. Thus the present invention affords an effective means for solving various problems in the treatment of disposed materials.

REFERENCES:
patent: 4049592 (1977-09-01), Maraws et al.
patent: 4076655 (1978-02-01), Finberg
patent: 4197371 (1980-04-01), Holst et al.
patent: 4256851 (1981-03-01), Taylor et al.

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