Patent ID: 8470433
Filing Date: 2013-06-25
Classification: B32B,C08L,Y10T

Abstract:
1. A transparent multilayer film which consists of the following layers: I. an upper layer consisting essentially of a semicrystalline polyamide molding composition which has a crystallite melting point of from 100 to 270° C. and an enthalpy of fusion of at least 10 J/g, wherein the upper layer has a thickness such that it is transparent or is translucent but appears transparent, wherein layer I comprises either (1) a mixture of PA66 and PA6IT, or (2) a semicrystalline polyamide prepared from a monomer mixture comprising: α) from 50 to 99 mol % (i) of a lactam or of a corresponding co-aminocarboxylic acid having 6, 7, 8, 9, 10, 11, or 12 carbon atoms, or (ii) of a substantially equimolar mixture composed of a linear aliphatic diamine with a linear aliphatic or aromatic dicarboxylic acid, where diamine and dicarboxylic acid in each case contains from 6 to 18 carbon atoms, and β) from 1 to 50 mol % of a substantially equimolar mixture composed of a linear aliphatic diamine with a linear aliphatic or aromatic dicarboxylic acid, where diamine and dicarboxylic acid in each case contains from 6 to 18 carbon atoms, except that if component α) is (ii), component β) differs therefrom, and II. a lower layer comprising a polyamide molding composition which comprises the following components: