Degradable/compostable concentrates, process for making degradable/compostable packaging materials and the products thereof
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United States of America Patent
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Dec 29, 1998
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app pub date -
Jul 24, 1997
filing date -
Dec 14, 1994
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Abstract
The present invention is directed to an additive degradable/compostable package, the combination of a metal carboxylate and an aliphatic poly hydroxy-carboxyl acids, which is added to polyolefin resins in the production of specific products. The addition of the additive degradable/compostable package produces a packaging product which is degradable/compostable. The additive package may include calcium oxide (CaO) to make the modified polyolefin resin more processable. Further, stabilizers or oxidizers may be added to the additive package. The additive package is specifically modified or tailored to the application of the packaging product, e.g. trash bag, compost bag, merchant bag, diaper liner, wrapping film, agricultural film, landfill cover or foamed planks. The present invention further includes the method or process of producing the degradable/compostable concentrates and the improvement of the process of making the degradable/compostable packaging products by the addition of calcium oxide (CaO).
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