El Paso Products Company

Rexene Products Company

Jack E Knott

Paul D Gage

Kenneth W Obitz

A starch filled, coextruded degradable polyethylene film includes a starch filled inner layer positioned between two outer layers that contain a prodegradant. The outer layers of the film, which contain no starch, enable the film to retain desirable physical properties similar to conventional polyethylene film. The prodegradant causes the outer layers of the film to degrade under appropriate conditions exposing the starch filled inner layer. The starch in the inner layer then serves as a source of nutrients for microorganisms which consume starch, leaving a porous structure that is vulnerable to oxidation, hydrolysis, direct enzyme action or combinations of these processes.

Starch filled coextruded degradable polyethylene film

Printable high strength, thin stretch wrap composite films exhibiting excellent self-adherence without heat sealing are comprised of at least two layers, wherein one outside layer is comprised of a tackified ethylene-vinyl acetate copolymer and the other outside layer of a very low density polyethylene copolymer having a density below 0.915. Optionally, a third inside layer of liner low density polyethylene is present in the composite film.

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Barrington, IL, United States of America

Jack E Knott