BIAXIALLY ORIENTED POLYESTER FILM

摘要

PURPOSE:To obtain a film having uniform minute surface structure and excellent travelling and abrasion resistance by containing a specific quantity of columnar or elliptic cylindrical batelite type calcium carbonate particles having specific mean particle size and particle size distribution value. CONSTITUTION:Columnar or elliptic cylindrical batelite type calcium carbonate particles are used. The particle size distribution value of calcium carbonate particles defined in formula (I) is 2.00 or less, and mean particle size is 0.07-1.5mum. The quantity of calcium carbonate particles blended with a film is selected from a range of 0.005-2.0wt.%. Where the integrate volume of a particle group is measured from the larger particle side in d25 and d75 in formula [I], and d25 and d75 represent particle size (mum) corresponding to 25% and 75% of the total volume respectively.