Biodegradable bag

Details Biodegradable bag Biodegradable bag

B - Operations, Transporting

32

B

B32B 27/36 (2006.01) B32B 3/08 (2006.01) B65D 30/08 (2006.01) B65D 33/25 (2006.01) B65D 65/46 (2006.01) B65D 75/26 (2006.01)

Patent

CA 2356674

A bag which can be heat-sealed at low temperatures, is not wavy, has transparency, and has degradability in the natural environment. A laminate of a biaxially stretched film consisting mainly of a polylactic acid polymer with a film consisting mainly of an aliphatic polyester having a given structure is heat-sealed so that the biaxially stretched film faces outward.

La présente invention concerne un sac qui peut être thermoscellé à des températures peu élevées, qui n'est pas ondulé, qui est transparent et biodégradable dans l'environnement naturel. Selon l'invention, un laminé comprenant un film orienté bi-axialement réalisé essentiellement dans un polymère d'acide polylactique et un film réalisé essentiellement dans un polyester aliphatique possédant une structure donnée est thermoscellé de façon que le film orienté bi-axialement est tourné vers l'extérieur.

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