Patent ID: 6191219
Filing Date: 2001-02-20
Classification: C08J,C08L,Y10T

Abstract:
A polypropylene resin composition for non-stretched monolayer film, comprising(A) 50-95 parts by weight of a polypropylene resin,(B) 3-40 parts by weight of an ethylene/.alpha.-olefin random copolymer with the .alpha.-olefin having at least three carbon atoms, the said random copolymer having a content of the structural unit of ethylene of 60-95 mole %, a density of 0.900 g/cm.sup.3 or lower, an MFR (melt flow rate), determined according to ASTM D-1238 at 190.degree. C. under a load of 2.16 kg, of 0.1-50 g/10 min. and a molecular weight distribution expressed by Mw/Mn, determined by gel permeation chromatography (GPC), of 3 or less, and(C) 2-20 parts by weight of a propylene/ethylene/1-butene random copolymer, which meets the three conditions 1), 2) and 3) given below,wherein the amounts of (A), (B) and (C) sum up to 100 parts by weight and wherein the said random copolymer (C) meets the following three conditions, namely,condition 1) that it comprises 50-88 mole % of propylene unit, 2-30 mole % of ethylene units and 10-40 mole % of 1-butene unit and that the content of the 1-butene unit is greater than the content of ethylene unit;condition 2) that it has an MFR, determined according to ASTM D-1238 at 230.degree. C. under a load of 2.16 kg, of 0.1-50 g/10 min.; andcondition 3) that is has a molecular weight distribution expressed by Mw/Mn, determined by gel permeation chromatography (GPC), of 3 or less.