Patent ID: 6426128
Filing Date: 2002-07-30
Classification: B29B,B29C,B29K,B32B,B65D,C09K,Y10T

Abstract:
A multi-layer laminate comprising:at least one low Tg layer comprising a first thermoplastic polyester, said first thermoplastic polyester comprising at least one crystallization rate inhibitor, and a high Tg layer having a Tg of at least 85Â° C. and greater than the Tg of said at least one low Tg layer, said high Tg layer comprising a thermoplastic material, wherein the total amount of crystallization rate inhibitor is effective to minimize haze in said low Tg layer upon heating the high Tg layer to a processing temperature at least 10Â° C. above the Tg of said high Tg layer and wherein the total amount of crystallization rate inhibitor does not prevent attaining a strain-induced crystallization of at least 15% of the at least one low Tg layer when said laminate is stretched at said processing temperature such that the at least one low Tg layer after said heating and stretching is substantially transparent as evidenced by a haze level less than 5%.