Method of making a compostable polymeric composite sheet

Details Method of making a compostable polymeric composite sheet Method of making a compostable polymeric composite sheet

1992-10-30

1994-08-09

Vargot, Mathieu

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

2642101, 2642106, 264284, 2642884, 260DIG43, B29C 4706, B29C 5904

Patent

active

053364570

ABSTRACT:
Compostable polymeric sheets of biodegradable or environmentally degradable polymers are included. These composite sheets may be made by extrusion and are compostable in municipal solid waste treatment facilities.
The composite film is formed by coextrusion of top and bottom water insoluble thermoplastic films having a water soluble polymer therebetween and stretching the composite along line space substantially uniformally across and through the depth of the composite for weakening the strength of the composite while maintaining its water impermeability.

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