CO-EXTRUDED COMPOSITE FILM BEING EASY TO UNSEAL

摘要

PROBLEM TO BE SOLVED: To prevent occurrence of a disadvantage that airtightness can not be maintained due to peeling immediately after sealing on the occasion when packing is made by a deep drawing packaging machine and also to attain an excellent unsealing property SOLUTION: One of straight-chain low-density polyethylene, low-density polyethylene and ethylene-vinyl acetate is used for a seal layer A and a blend of polypropylene and an ethylene-alpha olefin copolymer of 5-50% is provided as an adjacent layer B, while the thickness of the layer A is made 1-7μm.