Patent ID: 7094359

Claim:
A micro powder having an average particle size of from 0.5 to 50 μm, obtained by grinding a liquid crystalline polyester having a flow beginning temperature of from 200° C. to 270° C., wherein said liquid crystalline polyester is at least one selected from the group consisting of: (i) a polymer consisting essentially of a repeating unit derived from aromatic hydroxycarboxylic acids, a repeating unit derived from aromatic dicarboxylic acids and a repeating unit derived from aromatic diols, (ii) a polymer consisting essentially of repeating units derived from different aromatic hydroxycarboxylic acids, (iii) a polymer prepared by reaction of polyethylene terephthalate with aromatic hydroxycarboxylic acids, and (iv) at least one polymer according to (i), (ii), or (iii) provided that in place of said aromatic hydroxycarboxylic acids, aromatic dicarboxylic acids and aromatic diols, ester derivatives thereof are used.