| 摘要 |
PROBLEM TO BE SOLVED: To obtain a propylene copolymer film excellent in transparency, wrapping workability, scratch resistance, film appearance and low temperature heat salability. SOLUTION: This propylene copolymer film comprises a resin composition comprising 98-80 pts.wt. of a component A and 2-20 pts.wt. of a component B, and satisfies the inequality; MFRA/MFRB<=4. The component A is a propylene radon copolymer having the below-described characteristics (1) to (4). (1) A melting peak temperature (TP) by DSC: 110 deg.C<=TP<=140 deg.C. (2) a melting-finishing temperature (TE) by DSC: TE-TP<=8 deg.C, (3) an extraction amount with ortho dichlorobenzenene at 40 deg.C: <=2.0wt.%, and (4) a weight-average mol.wt./number- average mol.wt. ratio determined by gel permeation chromatography: 1.5 to 3.5. The component B is a propylene-ethylene block copolymer comprising 60-95wt.% of crystalline propylene polymer having an ethylene content of <=2wt.% and 40-5wt.% of propylene-ethylene copolymer having an ethylene content of 20-95wt.%. |
