WHITE POLYESTER FILM AND METHOD OF MANUFACTURING WHITE POLYESTER FILM AND REFLECTIVE SHEET USING THE SAME

摘要

The present invention relates to a white polyester film, a production method thereof, and a reflective sheet using the same. More specifically, the present invention relates to a white polyester film capable of increasing membrane stability while maintaining favorable optical properties. To this end, controlled are uniformity of organic particles which are incompatible with polyester, a detention time in a short tube prior to the discharge of the organic particles, the draw ratio, and a heat setting temperature after the drawing, thereby increasing uniformity of pores in a film central portion.