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Abstract

A multilayer biodegradable film is based on polylactides (polylactic acid), preferably obtained by reactive coextrusion, and may include at least one first layer A and at least one second layer B, in which the layer A and layer B are different from each other and the layer A includes: i) a minimum of 75 wt. % amorphous polylactic acid (PLA) with D isomer content ≥5%; and ii) triblock epoxy styrene-acrylate copolymer up to 5 wt. % of the total polylactic acid in this layer; and layer B includes: i) a minimum of 75 wt. % semi-crystalline polylactic acid with a degree of crystallinity ≥20% and low content of D isomer ≤5%; and ii) triblock epoxy styrene-acrylate copolymer up to 5 wt. % of the total polylactic acid in this layer. The multilayer biodegradable film may be three-layered and obtained by the blown extrusion method.

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First Claim