| 摘要 |
PURPOSE: A biaxially oriented polyester laminated white film is provided which can be widely applied to printing, imaging, advertising and exhibition purposes by having high whiteness and superior hiding powder and giving different surface characteristics to the front surface and back surface of the white film. CONSTITUTION: The biaxially oriented polyester laminated white film is characterized in that it is constructed in a three-layer laminated structure comprising a glossy layer (A layer) forming a surface layer in which 60 degree glossiness of the surface is 100% or more; an opaque layer (B layer) forming an intermediate layer in which 5 to 30 wt.% of inorganic particles and 0.5 wt.% or less of fluorescent bleaching agent are contained in polyester; and a matte layer (C layer) forming a back layer in which 60 degree glossiness of the surface is 50% or less, wherein an average particle size of the inorganic particles is 0.1 to 10 μm, wherein the inorganic particles are one or more particles selected from the group consisting of titanium dioxide and barium sulfate, wherein the glossy layer (A layer) is formed by adding 0.5 wt.% or less of silica particles having an average particle size of 0.05 to 5 μm to polyester, and wherein the matte layer (C layer) is formed by adding 0.5 to 10 wt.% of silica particles having an average particle size of 0.5 to 20 μm to polyester.
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