PROPYLENE RANDOM COPOLYMER COMPOSITION AND FILM THEREFROM

摘要

PROBLEM TO BE SOLVED: To provide a propylene random copolymer composition that can produce film having excellent stability, manifesting excellent heat sealing properties, showing good slipping and antiblocking properties, and can attain high-speed film formation. SOLUTION: The objective random copolymer composition is produced by formulating an antioxidant and/or a rusting inhibitor to a propylene-ethylene random copolymer meeting the following conditions: (1) the content of ethylene units (α) is 0.2-10 wt.% according to 13C-NMR measurement; (2) the elution (Wp) is >=20 wt.% in the temperature range of from (Tp-5) deg.C to (Tp+5) deg.C, when the main peak temperature is defined as Tp in deg.C in the temperature- programmed fractionation chromatography; (3) the elution (W0) in the temperature range of <=0 deg.C in the temperature-programmed fractionation chromatography andαsatisfy the following relation: W0<=(3+2α)/4.