Starch-based, biodegradable packing filler and method of prepari

Details Starch-based, biodegradable packing filler and method of prepari Starch-based, biodegradable packing filler and method of prepari

1992-01-21

1993-05-04

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

106122, 106210, 106213, 264 53, 264186, 521 841, 521 82, 521 88, C08J 302, C08J 912

Patent

active

052082679

ABSTRACT:
Starch-based biodegradable packaging fillers are provided which have high volumes, low weights, and excellent compressibility and resiliency properties. The products of the invention are fabricated by extrusion of a starch substrate, most preferably normal wheat starch, in the presence of minor amounts of a polyalkylene glycol or derivative thereof and/or a particulate bubble-nucleating agent. Effective biodegradable packaging fillers can thus be fabricated without the use of expensive modified starch substrates; however, such substrates can also be employed if desired, and the additives of the invention improve these products as well. In preferred production procedures, the additives are mixed with the starch substrate, and the mixture is preconditioned and then extruded through a twin screw extruder.

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Altieri, et al.; Starch-Based Protective Loose Fill Material; pp. 1-4.
Lai, et al.; Role of Sodium Bicarbonate and Trapped Air in Extrusion; Cereal Chem. 66(2); 69-73.

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