COMPOSITION FOR STRETCHABLE FILM

摘要

A composition for stretchable films which combines a high modulus and a low elongation set on a high level and can be satisfactorily formed into a stretchable film. The composition for stretchable films comprises: a block copolymer composition comprising a block copolymer (A) represented by general formula (A) and a block copolymer (B) represented by general formula (B); and a tackifier resin. Ar1a-Da-Ar2a (A) (Arb-Db)n-X (B) (In general formulae (A) and (B), Ar1a and Arb each is an aromatic-vinyl polymer block having a weight-average molecular weight of 6,000-20,000; Ar2a is an aromatic-vinyl polymer block having a weight-average molecular weight of 40,000-400,000; Da and Db each is a conjugated-diene polymer block having a vinyl bond content of 1-20 mol%; X is a single bond or a residue of a coupling agent; and n is an integer of 2 or larger.)