Thermoplastic resin composition and article comprising the same

A thermoplastic resin composition, comprising:

• about 100 parts by weight of a polyester resin comprising a repeat unit represented by Formula 1a and having a weight average molecular weight of about 3000 g/mol to about 200,000 g/mol
• about 40 to about 80 parts by weight of titanium dioxide;
• and
• about 30 to about 50 parts by weight of glass fillers comprising glass fibers having a circular cross-section and an average sectional diameter of about 6 μm to about 7.5 μm and flat glass fibers having a sectional aspect ratio of about 1.5 to about 8,
• wherein the amount of titanium dioxide and the amount of the glass fillers are based on about 100 parts by weight of the polyester resin,
• wherein a weight ratio of the glass fibers having a circular cross-section to the flat glass fibers ranges from about 6:34 to about 34:6, and
• wherein the thermoplastic resin composition has a reflectance of 93.5% to about 99%, as measured on a specimen having a size of 30 mm×50 mm×2.5 mm at a wavelength of 450 nm in accordance with ASTM E1331, a tensile strength of 740 kgf/cm2 to 800 kgf/cm2, as measured on a 3.2 mm thick specimen at a tensile speed of 5 mm/min in accordance with ASTM D638, and a notched Izod impact strength of 12 kgf cm/cm to 15 kgf cm/cm, as measured on a ⅛″ thick Izod specimen in accordance with ASTM D256.