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US 12,427,758 B2Granted
Multi-layer film with improved modulus properties
AssigneeCovestro Intellectual Property GmbH & Co. KG
InventorsHeinz Pudleiner, Klaus Meyer, Jürgen Winkler, Wolfgang Brauer, Joerg Nickel, Craig Pehlert, Chunhua Li, Yan Chen
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Abstract
The invention relates to a multi-layer, preferably co-extruded, plastic film with improved modulus properties, which is suitable, in particular, for producing three-dimensionally shaped articles.
Claims32
A multi-layer plastic film, having
- a layer A consisting of an at least one copolyester, the layer A having a glass transition temperature Tg from 80° C. to 200° C.,
- and at least one layer B containing at least one thermoplastic polyurethane, the at least one layer B exhibiting a hardness from 45 Shore D to 85 Shore D,
- and at least one third layer containing at least one polycarbonate or copolycarbonate and/or at least one polyester or copolyester,
- wherein the tensile strength of the multi-layer plastic film is in the range of from 40 to 60 N/mm2, determined in accordance with ASTM D 638.
1 more element
Dependencies are inferred from the claim text.