| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject film higher in transparency and excellent in slipperiness, useful for packaging, etc., by adding a fracture type silica and a spherical silica to a thermoplastic polymer film. SOLUTION: This thermoplastic polymer film is obtained by adding (B) 0.001-0.1wt.% of a fracture type silica 3 and (C) 1-20wt.% of a spherical silica 2 to (A) a thermoplastic polymer film 1 (preferably a film consisting of a polyethylene terephthalate or a polyethylene 2,6-naphthalate in 25-300μm thickness). The average particle diameter of the component C is larger than that of the component B. The difference is 1-5μm. The average particle diameter of the component B is 0.1-1.0μm and that of the component C is 2-4.5μm. The component B is preferably ground particles of natural quartz. |
