초록 ▼

A compostable multilayer structure in the form of a film, sheet, laminate, and the like, which comprises a core layer having a first surface and a second surface, a first blocking reducing layer covering the first surface of the core layer, and a second blocking reducing layer covering the second su

A compostable multilayer structure in the form of a film, sheet, laminate, and the like, which comprises a core layer having a first surface and a second surface, a first blocking reducing layer covering the first surface of the core layer, and a second blocking reducing layer covering the second surface of the core layer. The core layer contains a lactic acid residue-containing polymer and has a glass transition temperature (T.sub.g) below about 20.degree. C. The first and second blocking reducing layers include a polymer composition of a hydrolyzable polymer and have a T.sub.g above about 50.degree. C. The multilayer structure can be used for preparing bags and wrappers.

대표청구항 ▼

[ What is claimed:] [1.] A compostable multilayer structure comprising:(a) core layer having first and second opposed surfaces, said core layer includes lactic acid residue-containing polymer containing at least about 50%, by weight, lactic acid residue units, and an effective amount of plasticizer

[ What is claimed:] [1.] A compostable multilayer structure comprising:(a) core layer having first and second opposed surfaces, said core layer includes lactic acid residue-containing polymer containing at least about 50%, by weight, lactic acid residue units, and an effective amount of plasticizer to provide the core layer with a T.sub.g below about 20.degree. C.;(b) first blocking reducing layer covering the first surface of said core layer, said first blocking reducing layer having a T.sub.g above about 50.degree. C. and comprising a hydrolyzable polymer; and(c) second blocking reducing layer covering the second surface of said core layer, said second blocking reducing layer having a T.sub.g above about 50.degree. C. and comprising a hydrolyzable polymer, rein said blocking reduced layers provide reduced blocking compared with said core layer.[ D5338-92, modified to test at about 58.degree. C.][ D5338-92, modified to test at about 58.degree. C.]