According to the content of titanium dioxide in polyester chips, the chips are generally divided into high gloss, semi dull and full dull. The results show that the mass fraction of titanium dioxide is 0% in the bright section, 0.30% ± 0.05% in the semi dull section, and 2.5% ± 0.1% in the full dull section. The main difference between the semi extinction section and the full extinction section is that the content of titanium dioxide is different, and the latter is more than 8 times of the former.
Full dull polyester chip is a high value-added product in domestic polyester market. It not only reduces the reflection and flicker of the fiber, but also makes the follow-up fiber have the advantages of soft luster, good deep dyeing property, high fabric drapability and strong shielding performance, which can meet the needs of garment production.