Filler-containing resin composition and stretched films using same.

摘要

A filler-containing resin composition that can be very readily for being formed by stretching, and that is advantageously usable for the formation of thin formed bodies having excellent elastic recovery, strength and feeling, and also having very excellent gas-permeability. The composition contains component A, which is a copolymer of ethylene and olefin having a carbon number of not less than 3, and component B, which is a particulate inorganic filler. The component A has: (a) a melt flow rate (MFR) of 0.01 to 20 g/10 min.; (b) a density D of not more than 0.935 g/cm<3>; (c) a single peak of elution volume indicated by an elution curve obtained by temperature rising elution fractionation (TREF), the peak corresponding to a temperature within a range from 30 to 100 DEG C, and the elution curve satisfying a relationship in which the ratio H/W is not less than 1 when H represents the height of the peak and W represents the width of the elution curve at half of the height H; and (d) an elution volume Y (in % of the weight thereof with respect to the total weight of the component A) at an elution temperature of 50 DEG C in TREF, the elution volume Y satisfying the following condition : 1/ &cir& Y </= - 4500D + 4105 when the density D of the component A is less than 0.91 g/cm<3>, but Y </= 100; or 2/ &cir& Y </= 10 when the density D of the component A is not less than 0.91 g/cm<3>. The particulate inorganic filler has an average particle size of not more than 10 mu m, and a bulk density of 0.1 to 0.7 g/cm<3>.