| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compsn. having no coarse particles formed and being excellent in the clip property, wear resistance, electrical characteristics, drillability, fabricability as a metal-clad sheet, and flavoring property, by blending a thermoplastic polyester resin with hydroxyapatite particles having a specified particle dia. in a specific ratio. SOLUTION: A compsn. is obtained by blending 0.001-10 wt.% of hydroxyapatite particles having an average primary particle dia. of 5-200 nm, average secondary particle dia. of 0.1-10μm, and a relative standard deviation of the secondary particle dia. of 0.95 or less. The hydroxyapatite pref. is such that the compsn. ratio satisfies Ca(PO4)l(OH)m(CO3)nYx [wherein Y is an anionic ion except for phosphoric acid, hydroxyl, and carbonic acid group ions; l is 0.4-0.6; m is 0.1-0.4; n is 0-0.2; x is 0-0.2; 3×l+m+2×n+z×x=2 (z is a valence of the anionic ion Y)]. A good action is obtained especially when n is 0.005-0.2 and/or x is 0.005-0.2. The hydroxyapatite pref. has a heat wt. loss of 2 wt.% or more. |
