| abstract |
The invention discloses a low-gloss matt polyester film, which is mainly obtained from a blend of bright polyester powder and composite additives through melt plasticization, casting and stretching; Composite additives include inorganic powders and expandable microspheres of similar size. The invention also discloses the preparation method of the matte polyester film. Compared with the conventional matte film with the same content, the glossiness of the matte film added with the compound additives in the present invention can be reduced by more than 20%, and the glossiness is 8.3%; The dosage of the composite additive in the invention is only 3% to 5% of the mass of the glossy polyester powder, and while ensuring low gloss, it can also effectively improve the problem of difficulty in post-processing and stretching of the matte polyester film. |