Patent ID: 9636893
Date: 2017-05-02
CPC Classifications: B29C,B29K,B32B,C08K,C09J,Y10T

Claim:
1. A composite sheet material, comprising: a cover sheet having a cover sheet material that includes polyethylene terephthalate; a substrate having a substrate material that includes polypropylene; and an adhesion promoting layer disposed between the cover sheet and the substrate, wherein a first side of the adhesion promoting layer is disposed towards the cover sheet and in contact with the cover sheet, a second side of the adhesion promoting layer is disposed towards the substrate and in contact with the substrate, the second side of the adhesion promoting layer includes polypropylene drawn from the substrate, the first side of the adhesion promoting layer has an affinity to bond to the coversheet material, and the second side of the adhesion promoting layer has an affinity to bond to the substrate material.