| 摘要 |
PROBLEM TO BE SOLVED: To obtain an adhesive which can be applied with a usual hot-melt applicator and has both adhesiveness and expansibility by compounding a specific block copolymer, a tackifying resin, and a softener. SOLUTION: A compsn. which can bond woven fabrics, knitted fabrics, nonwoven fabrics, films, etc., expansibly is prepd. by mixing 100 pts.wt. block copolymer which contains elastic polymer segments (A) represented by the formula and selected from among segments of polymers having normal rubber elasticity, esp. segments of a polymer selected from among a butadiene polymer, an isoprene polymer, their hydrogenation products, and an ethylene-propylene copolymer and polystyrene segments (B) and which has a styrene content of 10-60wt.% and an MFR of 30g/10min or higher, 20-200 pts.wt. hydrogenated terpene-base tackifying resin which is a colorless or white odorless resin having a relatively low mol.wt., and 5-100 pts.wt. paraffinic oil as a softener which has a mol.wt. lower than that of the tackifying resin, has a function to improve the flowability and to adjust the viscosity, and is compatible with the foregoing ingredients. |
