| abstract |
The invention relates to the technical field of polymer materials, and discloses a low-shrinkage matt polyester film masterbatch, a polyester film and a preparation method thereof. The polyester film masterbatch comprises raw material components: 70-80% polyester and 20- 30% modified matt mixed powder; the modified matt mixed powder includes barium sulfate 40-58%; kaolin 30-48%; alkali-free glass fiber 8-12%; coupling agent 0.1-0.3%; The modified matt mixed powder designed by the invention contains barium sulfate, kaolin, alkali-free glass fiber and coupling agent, which can reduce the thermal shrinkage rate and gloss of polyester material, and improve the tensile strength of polyester film. Improve the interface bonding force between inorganic materials and polyester, promote internal stress transfer of composite materials, and uniform powder dispersion. The synergistic effect of multiple components endows the final low shrinkage matt polyester film with lower thermal shrinkage, lower gloss, higher strength and haze. |