| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas which is permeable film with the excellent transparency and gas permeability, and suitable for the freshness preservation packaging for fruits and flowering plants. SOLUTION: The gas permeable film has the melt flow rate (ASTM D1238, 230°C, load 2.16 kg) in a range of 1-10 g/10 minutes, and the melting point measured by a differential scanning calorimeter (DSC) in a range of 145-170°C. It contains a propylene-ethylene block copolymer (A) including 90-70 wt% of a component satisfying specific requirements, insoluble to n-decane at a room temperature (D<SB>insol</SB>) and 10-30 wt% of a component satisfying specific requirements, soluble to n-decane at a room temperature (D<SB>sol</SB>). COPYRIGHT: (C)2009,JPO&INPIT |
