Resin composition for extruded forms

Abstract

A resin composition for extruded forms that has improved workability, and excellent properties with respect to transparency, heat resistance, low-temperature resistance, etc. The composition contains 50 to 99% by weight of component A, which is a copolymer of ethylene and &agr;-olefin, and 1 to 50% by weight of component B, which is an ethylene-containing polymer. The component A has: (a) a melt flow rate (MFR) of 0.1 to 5 g/10 min.; (b) a density D of 0.88 to 0.925 g/cm ; (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 of from 30 to 100®, 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 50C in TREF, the elution volume Y satisfying the following condition: {circle around (1)} Y≦−4500D+4105 when the density D of the component A is less than 0.91 g/cm , but Y≦100; or {circle around (2)} Y≦10 when the density D of the component A is not less than 0.91 g/cm . The component B has: (a′) a melt flow rate of 0.1 to 20 g/10 min.; (b′) a density of 0.88 to 0.93 g/cm ; (c′) a memory effect (ME) of not less than 1.3; and (d′) a melt tension (MT) of not less than 1.0 g.