EASILY TEARABLE, UNSTRETCHED POLYPROPYLENE-BASED FILM, AND LAMINATED BODY THEREOF

摘要

PROBLEM TO BE SOLVED: To provide an unstretched polypropylene-based film which is excellent in easy tear property in the flow direction of a molten and extruded resin, has good impact resistance at a low temperature, is widely usable in high retort use (sterilization at 125-135°C) as a retort packaging bag, and has heat-sealing properties and blocking resistance; and a laminated body thereof. SOLUTION: The unstretched polypropylene-based film for high retort includes 100 pts.wt. of a propylene-ethylene block copolymer (A) and 3-10 pts.wt. of a lowly crystalline ethylene-based elastomer (B) having a density of 0.865-0.890 g/cm3and an endothermic amount (JIS K7122) during melting of 5-30 J/g, and has a birefringence in a range of 3.0×10-3to 5.0×10-3. The laminated body thereof is also provided. COPYRIGHT: (C)2011,JPO&INPIT