PDLC dimming membrane and edge sealing process thereof

Abstract

The invention provides a PDLC dimming membrane and an edge sealing process thereof. The process comprises the following steps of manufacturing an electrode of the PDLC dimming membrane and forming a groove between the electrode and the PDLC dimming membrane; placing the PDLC dimming membrane with the electrode on a platform and cleaning the PDLC dimming membrane by using a cleanser; covering the electrode area for protection by using an adhesive tape; in the area, without the electrode, of the PDLC dimming membrane, cutting an edge sealing groove at a position more than 5mm inwards from the edge by using a cutting device; cleaning the materials cut from the edge sealing groove by using a solvent which is capable of dissolving PDLC; painting a cementation accelerant at the edge sealing groove; and filling polyurethane flue into the groove between the electrode and the PDLC dimming membrane and the edge sealing groove for curing by using a gluing device, and ripping out the adhesive tapeafter the curing is finished. The dimming membrane produced by adoption of the edge sealing process is favorable in edge sealing, firm in edge sealing glue cementation, good in bending resistance anddifficult to break.

Description

Technical field: [0001] The invention relates to the technical field of dimming films, in particular to a PDLC (polymer dispersed liquid crystal) dimming film used in automotive laminated glass and an edge sealing process thereof. Background technique: [0002] With the improvement of people's living standards and the acceleration of the pace of life, cars have become a necessity of life. The frequency of cars being used for office, travel and other activities has increased, and people's demands for privacy and comfort functions of cars are increasing. With the advancement of dimming film technology, dimming glass combined with dimming film and glass has emerged as the times require. This type of product can adjust the light transmittance of the glass by turning on and off the power to achieve privacy adjustable functions. In the field of automotive glass, automotive dimming glass also has a large market, but automotive glass has higher standards than architectural glass, s...

AI Technical Summary

Problems solved by technology

Although such a solution does alleviate the problem of the transparent dividing line, when applying glue on the half-cut steps, due to the effect of gravity, uneven glue application will inevitably occur. There is a risk of edge sealing defects; the bonding surface of the glue only exists on the side and the bottom surface, the bonding area is small, the bonding is not firm, and the edge sealing adhesive is easy to debond; the PET used for the transparent base of the dimming film is a low surface energy material. Without surface treatment, no matter it is epoxy resin or polyurethane adhesive, the bonding strength to PET is not high; the low temperature flexibility of epoxy resin is not enough, and the epoxy resin is easy to break when PDLC is transported in rolls, resulting in debonding

Therefore, in the actual use of the dimming film produced by the current edge banding process, it is found that there are still transparent dividing lines and other defects that cause poor edge banding.

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