Patent ID: 7129317

Claim:
A polyethylene terephthalate resin, comprising: less than about 25 ppm of elemental antimony, if any; and more than about 5 ppm of elemental phosphorus; and wherein the polyethylene terephthalate resin has a heating crystallization exotherm peak temperature (T CH ) of more than about 140° C. at a heating rate of 10° C. per minute as measured by differential scanning calorimetry; wherein the polyethylene terephthalate resin has an absorbance (A) of at least about 0.18 cm −1 at a wavelength of 1100 nm or at a wavelength of 1280 nm; and wherein the polyethylene terephthalate resin has an L* luminosity value of more than about 70 as classified in the CIE L*a*b* color space.