Preparation method of anti-fog and anti-ultraviolet polyester film

Abstract

The invention relates to a preparation method of an anti-fog anti-ultraviolet polyester film. The method comprises the following steps: fully mixing binary acid, water and caprolactam in a certain molar ratio, and performing a pre-polymerization reaction to obtain a HOOC-(CONH)n-COOH product; adding nano-zinc oxide and benzene sulfonic acid, and continually stirring for reacting to obtain a hydrophilic anti-ultraviolet HOOC-(NHCO)n-COO-ZnO pre-polymer; mixing and beating the prepared pre-polymer, binary acid, dihydric alcohol, a poly-condensation catalyst, a thermal stabilizer and an anti-oxidant for performing an esterification and poly-condensation reaction to obtain hydrophilic anti-ultraviolet modified polyester; co-extruding and compounding the hydrophilic anti-ultraviolet modified polyester serving as a component A and conventional polyester serving a component B through a melt tube and a T-shaped die head to obtain A-B dual layers or ABA triple layers, and performing strip casting, biaxial stretching, heat setting and coiling to obtain the anti-fog anti-ultraviolet polyester film. By adopting the method, the problem of dispersity of inorganic powder in a polyester substrate can be solved.

Description

technical field [0001] The invention relates to a preparation method of an anti-fog and anti-ultraviolet polyester film, which belongs to the technical field of polyester films. Background technique [0002] In daily life, when there is a certain temperature difference or humidity difference between the inside and outside of glasses, car window glass, building interior and exterior window glass, etc., they will often be fogged and affect the use. Ultraviolet rays in the sun can cause aging and damage to materials, and long-term direct sunlight can also cause radiation damage to the human body. Therefore need a kind of film with anti-fog and anti-ultraviolet function, be used for spectacle lens, building glass, automobile sunroof or side window glass etc., can prevent surface from fogging, also has the effect of anti-ultraviolet simultaneously. [0003] In terms of anti-fog polyester film research, the essence of fog is water vapor condensation. Fog in nature is formed when...

AI Technical Summary

Problems solved by technology

However, when nano-inorganic powders are introduced into polymers, the biggest problem is that due to their small size and large specific surface, they are easy to cause agglomeration, which adversely affects the molding process and gloss of polymers.

[0005] Although there are relevant literature reports at home and abroad on the anti-fog and anti-ultraviolet properties of polyester films, there are few reports on how to realize the anti-fog and anti-ultraviolet multifunctional composite of polyester films. Due to separate scientific design, efficient synergy between organic and inorganic modified components cannot be achieved

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