FRESHNESS-KEEPING FILM

摘要

PROBLEM TO BE SOLVED: To provide a film suitable as the packaging material having high transparency, glossiness and mechanical strength, and having antibacterial properties and gas permeability which are required for freshness-keeping of contents. SOLUTION: The film comprises at least one layer obtained by processing a resin composition comprising (A) a crystalline propylene polymer and (B) a propylene/α-olefin random copolymer at a ratio [η]B/[η]A of the intrinsic viscosity [η]B of (B) to that [η]A of (A) of 0.3-1.2, and the film is coated or incorporated with an antibacterial agent and the obtained film is constituted to have (1) a water vapor transmission [TH20] of 9-50 (unit: g/m2.24 h), (2) an oxygen gas transmission [T02] of 600-12,500 (unit: nmol/m2.s.100 kP), and (3) an ethylene gas transmission [Tethylene] of 600-22,500 (unit: nmol/m2.s.100 kP).