Production process of durable photochromic PET (Polyethylene Terephthalate) film

Abstract

A preparation technology of a photochromic PET film capable of being used durably comprises the steps that a glycerol solution with the concentration of 8% is added into composite sol with the molecular ratio of WO3 to TiO2 to ZnO being 22: 1: 1-15: 1: 1, and a photochromic solution is formed; a PET base film is conveyed into a soaking kettle, after vertical soaking, oblique soaking, liquid control and drying are conducted, an upper guide roller guides an upper covering film, a lower guide roller guides the PET base film and a lower covering film, and the upper covering film, the upper photochromic layer, the PET base film, the lower photochromic layer and the lower covering film are laminated to finally form a formed film with the structure of the upper covering film, the upper photochromic layer, the PET base film, the lower photochromic layer and the lower covering film. Therefore, the formed film has uniform and excellent optical performance, meanwhile, stripping between the films is avoided, and the use durability is better.

Description

technical field [0001] The content of the present invention belongs to material science, in particular, it relates to a durable photochromic PET film production process. Background technique [0002] With the continuous development of science and technology and the progress of human society, people's requirements for material materials are also increasing. Among various new materials, photochromic materials are favored by researchers because of their reversible color changes under the irradiation of excitation light. It has great application prospects in the fields of optical information storage, large-area data display, smart glass and military anti-counterfeiting. [0003] Photochromism is the product of a compound that undergoes a series of chemical reactions that transform into another color when it is irradiated by light of a certain wavelength; the absorption spectrum changes significantly due to changes in the molecular structure or electronic configuration of the su...

AI Technical Summary

Problems solved by technology

Traditional measuring instruments include spectrophotometers, spectrometers, scanning electron microscopes, transmission electron microscopes, diffractometers, etc. These instruments have high measurement accuracy, but are usually expensive, professional, and relatively complicated to operate. They are usually used for product samples. Sampling testing, not suitable for mass production in factory production lines

[0009] In the prior art, there is also a means of rapid detection using image processing methods, but the conventional image processing technology is not specially designed for the difficulties of film detection on the production line, and is not suitable for polyester film production lines. Usually, the detection error rate is high and cannot be detected. actually used in the factory

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