Patent ID: 11260634

Abstract:
The objective of the present invention is to provide a packaging bag which is produced from a laminate, which is excellent in straight cut property and which hardly cause a parting, even if the laminate contains a biaxially stretched PBT film having a large distortedness of a molecular orientation axis. The laminate has a biaxially stretched film substrate consisting of a polyester resin composition and a sealant film consisting of a polyolefin resin composition, and has a straight cut property in a longitudinal direction of 5 mm or less. The polyester resin composition contains 60 wt % or more of a polybutylene telephthalate resin, and the polyolefin resin composition contains 40 wt % to 97 wt % of a propylene-ethylene block copolymer, 3 wt % to 10 wt % of an ethylene-propylene copolymer elastomer, and 0 wt % to 50 wt % of an ethylene-αolefin random copolymer.