Patent ID: 8501869

Claim:
A hot-melt adhesive composition comprising a block copolymer composition which includes a block copolymer A represented by the following general formula (A) and a block copolymer B represented by the following general formula (B), and a tackifying resin, wherein a weight ratio (A/B) of the block copolymer A and the block copolymer B in the block copolymer composition is 25/75 to 90/10, and an aromatic vinyl monomer unit content of the block copolymer A is 41% or greater: Ar1 a -D a -Ar2 a (A) (Ar b -D b ) n -X (B), in the general formulas (A) and (B), Ar1 a and Ar b each represent an aromatic vinyl polymer block having a weight average molecular weight of 6,000 to 15,000; Ar2 a represents an aromatic vinyl polymer block having a weight average molecular weight of 40,000 to 400,000; D a and D b each represent a conjugated diene polymer block having a vinyl bond content of 1 mol % to 20 mol %; X represents a single bond, or a residue of a coupling agent; and n represents an integer of 2 or greater.