EASILY TEARABLE BIAXIALLY ORIENTED POLYESTER FILM

摘要

PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film having linear tearability in the longitudinal and/or transverse directions and a packaging bag made thereof. SOLUTION: This film is made from 60-95wt.% polyester A mainly consisting of repeating ethylene phthalate units and 40-5wt.% polyester B comprising a dicarboxylic acid component containing 50 mol% or above aromatic dicarboxylic acid and a glycol component containing 50mol% or above 3-10C glycol and dispersed in polyester A in the form of islands and has a tensile strength of 20-35kgf/mm<2> ,a dry heat shrinkage of 3% or below (160 deg.C×15min), and a haze of 5% or below.