| abstract |
A polyester resin composition which is excellent in mechanical properties, deflection temperature under load, surface appearance, dimensional stability, and releasability. The composition comprises a thermoplastic polyester resin and a phyllosilicate, wherein the phyllosilicate contained in the resin composition satisfies at least one of the following requirements (a) to (c): (a) the proportion of phyllosilicate particles having an equi-areal circle diameter, [D], of 3,000 Å or smaller is 20 % or higher, (b) the average of the equi-areal circle diameters [D] is 5,000 Å or smaller, and (c) the number of phyllosilicate particles, [N], present per 100 νm2 of the resin composition is 30 or larger. |