Patent ID: 6908646
Filing Date: 2005-06-21
Classification: C09K,G02B,Y10T

Abstract:
1. An anisotropic scattering film, wherein (I-1) said film has a seal-island structure which comprises a matrix phase consisting of at least one polymeric material, and a dispersed phase consisting of at least one polymeric material, (I-2) the dispersed phase is rod-like, (I-3) the dispersed phase substantially orientates to one direction, (I-4) the refractive index of the dispersed phase in major axis direction differs from the refractive index of the matrix phase in the corresponding direction, and (I-5) the diameter of the dispersed phase is 200 nm or less, and the length of the dispersed phase is 800 nm or more, wherein the polymeric material forming the dispersed phase has FT of 170° C. or more and less than 350° C., FT being a temperature at which the melt viscosity of the polymeric material is 48000 poises when the material is heated at a temperature-raising rate of 4° C./minute while being extruded from a nozzle having 1 mm of inner diameter under a load of 100 kg/cm wherein Ar wherein Ar wherein Ar