Patent ID: 7943230
Filing Date: 2011-05-17
Classification: B29C,B29K,B32B,Y10S,Y10T

Abstract:
1. A biaxially-stretched polyester laminate film comprising at least three layers, comprising: a layer substantially free of a molecular orientation and layers having a molecular orientation laminated on both sides of the layer substantially free of a molecular orientation, the layers having a molecular orientation showing a difference (Nx−Ny) between the refractive index Nx in the longitudinal direction and the refractive index Ny in the width direction of −0.010 to 0.010 and the refractive index Nz in the thickness direction of 1.480 to 1.492 and having a thickness of 1-8 μm, wherein the layer substantially free of a molecular orientation comprises an elastomeric component dispersed in a polyester resin to form a sea-island structure, and wherein at least one of the layers having a molecular orientation does not have a dispersion structure and has an adhesive layer laminated on an exposed surface side thereof.