Patent ID: 9676133
Date: 2017-06-13
CPC Classifications: B29C,B29K,B29L,B32B,B42D,Y10T

Claim:
1. A method for manufacturing a foil composite material in the form of a coextrusion of a first outer layer plastic material, a second outer layer plastic material, and an inner layer plastic material, comprising: merging all the plastic materials in a molten state, and extruding them through an extruder nozzle that extrudes a foil, to thereby obtain an extruded foil composite material, in which the inner plastic layer is formed between the first and the second outer plastic layer, wherein the inner layer plastic material is a thermoplastic copolyester elastomer (TPC) or contains a TPC, and the first and the second outer layers each comprise an outermost partial layer of polyethylene terephthalate glycol copolymer (PETG) or containing a PETG, and an innermost partial layer comprising a mixture of PETG and TPC, wherein the innermost partial layers each comprise 20% of a total layer thickness of the foil composite material, and wherein the content of TPC is higher the further inward the plastic material is located and the content of PETG is higher the further outward the plastic material is located.