| 摘要 |
The present invention is a polyester resin composition including: a copolymer polyester resin (A); a titanium oxide (B); at least one type of reinforcing material (C) selected from a group comprising a fibrous reinforcing material and a needle-like reinforcing material; and a non-fibrous or non-needle-like filler (D). The polyester resin composition contains the titanium oxide (B) in the amount of 0.5-100 parts by mass, the reinforcing material (C) in the amount of 0-100 parts per mass, and the non-fibrous or non-needle-like filler (D) in the amount of 0-50 parts per mass, relative to 100 parts per mass of the copolymer polyester resin (A). The present invention is capable of providing the polyester resin composition used in a reflective plate for a surface-mounted LED, wherein the copolymer polyester resin (A) has a 4,4'-biphenyldicarboxylic acid, an acid component comprising other dicarboxylic acids, and a glycol component as the constituent components thereof, and a fusion point of at least 280°C, said polyester resin composition being suitable for reflective plates for surface-mounted LEDs and having excellent heat resistance, excellent moldability during injection molding, excellent low water absorbability, and excellent surface reflectivity. |
