ELASTIC MEMBERS FOR INKJET RECORDING APPARATUS, INK TANKS AND INKJET RECORDING APPARATUS

摘要

Elastic members for inkjet recording apparatus, made from (1) a thermoplastic elastomer composition comprising (a) 100 parts by weight of a hydrogenated block copolymer, (b) 60 to 170 parts by weight of a non-aromatic softener for rubber, and (c) 5 to 30 parts by weight of polypropylene, (2) a thermoplastic elastomer composition comprising (a) 100 parts by weight of a hydrogenated block copolymer, (b) 60 to 170 parts by weight of a non-aromatic softener for rubber, and (c) 5 to 30 parts by weight of a crystalline polyolefin and taking the form of a network structure having a pore diameter of 50 mu m or below, or (3) a thermoplastic elastomer composition comprising (a) 100 parts by weight of a hydrogenated block copolymer, (b) 60 to 170 parts by weight of a non-aromatic softener for rubber, and (c) 5 to 30 parts by weight of a crystalline polyolefin and having a dependence of melt viscosity on shear rate of -1.5 to -0.8 as measured with a capillograph. The elastic members are usable as ink tank valves, ink tank seals, sealing devices for protecting ink leaks from recording heads, and so on.