Resin powder material, laser powder molding method and device

Molded bodies formed from PA-12 resin lose elasticity by absorbing water and lose strength as a result. Due to this, application to only some products used in low humidity environments is possible, which is a problem that needed to be addressed. This resin powder material, for use in powder laminate molding methods, is characterized in that the resin powder is a polybutylene terephthalate resin which has a crystallization temperature lower than that of homopolybutylene terephthalate resins.