| 主权项 |
1. Composite polyamide fine particles comprising a polyamide (A1) having a melting point or a glass transition temperature higher than 100° C. and a polymer (A2) different from said polyamide (A1), wherein said polymer (A2) comprises at least one selected from the group consisting of a polyamide different from said polyamide (A1), a polyamide elastomer, a polyester, a polyester elastomer, an amorphous polyarylate, a polycarbonate, a polyethersulfone, a polyarylene ether, a polyetherimide, a polyamideimide, a polyether ketone and a polyetherether ketone, said composite polyamide fine particles have a dispersion structure in which a plurality of domains each having a particle diameter of 0.05 to 100 μm whose main component is said polymer (A2) are dispersed in a matrix having said polyamide (A1) as its main component, and said composite polyamide fine particles have an average particle diameter of 0.1 to 500 μm and a sphericity of 80 or more, and, when solubility parameters of said polyamide (A1) and said polymer (A2) are referred to as δA1 and δA2, respectively, a relation of |δA1−δA2|≧1.6[(J/cm3)1/2] is satisfied. |
