| 摘要 |
PURPOSE: A white film is provided to ensure excellent masking property and whiteness and good operation property, to minimize the generation of air gap, to prevent the breakage generation of a film. CONSTITUTION: A white film comprises a polyester resin and barium sulfate. The barium sulfate has an average particle diameter of 1.0~1.5 micron by original state diameter or no particles with average particle diameter of 0001-0.3 micron, no particles with average particle diameter of 5 volume% or less or 3.0~10.0 micron, and a particle size distribution of 5 volume % or less. A ratio of long diameter/ short diameter is 0.7~1.0 and refractive index is 1.6~1.7. |
