Thermoplastic elastomer powder composition for powder molding, powder molding method using the same and molded article thereof

摘要

A thermoplastic elastomer powder composition for powder molding, comprising 100 parts by weight of the following thermoplastic elastomer powder (A) and 0.05 to 20 parts by weight of a fine powder having an average particle diameter of 30 mu m or less: (A) (i) a powder of a thermoplastic elastomer comprising a composition composed of an ethylene- alpha -olefin copolymer rubber and a polyolefin resin or (ii) a powder of a thermoplastic elastomer comprising a partially crosslinked composition composed of an ethylene- alpha -olefin copolymer rubber and a polyolefin resin, the thermoplastic elastomer powder having a complex dynamic viscosity eta *(1), as measured at a frequency of 1 radian/sec and at 250 DEG C., of 1.5x105 poise or less and a Newtonian viscosity index n, calculated from the following formula by using the above-mentioned complex dynamic viscosity eta *(1) and the complex dynamic viscosity eta *(100) measured at a frequency of 100 radian/sec of 0.67 or less: n=(log eta *(1)-log eta *(100))/2.