| 摘要 |
<p>A propylene resin composition suitable for use as a non-stretched 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, the alpha -olefin having at least three carbon atoms and the random copolymer having a content of structural units derived from ethylene of 60-95 mole %, a density of 0.900 g/cm<3> or lower, an MFR (melt flow rate, determined according to ASTM D-1238 at 190 DEG 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, wherein the total amount of (A), (B) and (C) is 100 parts by weight and wherein the said random copolymer (C) meets the following three conditions: 1) it comprises 50-88 mole % of units derived from propylene, 2-30 mole % of units derived from ethylene and 10-40 mole % of units derived from 1-butene, the content of units derived from 1-butene being greater that the content of units derived from ethylene; 2) it has an MFR, determined according to ASTM D-1238 at 230 DEG C under a load of 2.16kg, of 0.1-50 g/10min.; and 3) it has a molecular weight distribution, expressed by Mw/Mn, determined by gel permeation chromatography (GPC), of 3 or less. i</p> |
