Propylene-based resin composition and heat-shrinkable film

摘要

Disclosed is a resin composition comprising from 20 to 99 parts by weight of a propylene-based polymer A having an MFR<A >of from 0.3 to 20 g/10 min and a melting point Tm<A >of from 125 to 140° C. and from 1 to 80 parts by weight of a propylene-based polymer B having an MFR<B >of from 21 to 200 g/10 min and a melting point Tm<B >of from 135 to 170° C., wherein a ratio Tm<A>/Tm<B >is less than 1, wherein a ratio MFR<A>/MFR<B >is 0.01<MFR<A>/MFR<B><1 and wherein the resin composition has an MFR of from 0.3 to 20 g/10 min and a melting point of from 130 to 145° C. A heat-shrinkable film obtained by stretching the composition at least uniaxially is also disclosed which is superior in rigidity, heat shrinkage, weld-cut sealability and stretch processability. Incorporation of a nucleating agent improves the transparency of the film.