Polyester blends and their use in compostable products such as d

Details Polyester blends and their use in compostable products such as d Polyester blends and their use in compostable products such as d

1992-02-13

1993-06-15

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428481, 428532, 525437, 604370, 604372, 521916, B32B 2734, B32B 2736, C08F 2000

Patent

active

052196461

ABSTRACT:
The invention provides novel blends of starch with polyesters, and shaped articles of such blends, including fibers, foams and films, nonwovens from the fibers and disposable products such as diapers. The products are degradable under the conditions typically existing in waste composting processes, have low ingredient costs and yet provide strength and toughness properties adequate for end uses such as in disposable diapers. The polyesters are based upon polyethylene terephthalate copolymerized with other ingredients, including non-aromatic diacids, such as adipic and glutaric acids, polyethylene ether groups, such as diethylene glycol or higher polyalkylene glycols, and hydroxy acids.

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