| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hot-melt adhesive capable of absorbing aqueous liquid by including a block copolymer, a tacky resin and an aqueous-liquid-absorbing polymer in specified proportions. SOLUTION: This hot-melt adhesive is obtained by including (A) about 10-50 wt.% of a block copolymer, pref. a linear or radial copolymer structure of the formula (A-B)x [block A is a polyvinylallene block; block B is a poly(monoalkenyl) block; x is the number of polymer arms, being >=1], (B) about 20-80 wt.% of a tacky resin consisting of a natural or modified resin, polyterpene resin, or the like, (C) about 1-60 wt.% of an aqueous-liquid-absorbing polymer, pref. a thermoplastic hydrogel, thermoplastic polymer composition, or the like, and, as necessary (D) about 0-40 wt.% of a plasticizer, (E) about 0-2.0 wt.% of an antioxidant, (F) an absorptive thermoplastic polymer, and (G) superabsorptive particles, etc. |
