Biaxially oriented aliphatic polyester-based film and its production

摘要: PROBLEM TO BE SOLVED: To obtain the subject film having excellent slipperiness, restrained from meandering and occurrence of wrinkles maintained in e.g. firmness, mechanical strength low-heat shrinkability by including inorganic particles a specific aliphatic polyester bringing average roughness surface within range. SOLUTION: This is obtained (B) preferably 0.01-120 pts.wt. each with mean particle size 0.1-5 μm (e.g. silica) (A) 100 an composed mainly polylactic acid-based polymer weight-average molecular weight 100,000-300,000, designing Ra to satisfy relationship: 0.01