Causes and solutions to laminated glass defects

In the construction, automobile and other industries, laminated glass is highly favored for its excellent safety performance. However, various defects often occur during the production process, affecting its performance and application. Understanding the causes of these defects and mastering the solutions are of great significance to ensuring product quality.In terms of appearance, defects in the original glass are the first to be affected. If there are optical deformations and bubble inclusions in the original glass, the quality of the laminated glass will be directly reduced, and they must be strictly screened and removed before production. Improper operation during cutting, edge grinding and cleaning can easily cause scratches and water marks. If the cutting platform is not clean and the edge grinding machine belt pressure is too high, scratches will appear on the glass surface; if the wind knife position is not good during cleaning and the cleaning speed is unreasonable, water marks will remain.Bubbles and degumming are also common appearance defects. Small bubbles on the edge of the glass are mostly caused by too short decompression time of the autoclave; large bubbles may be caused by poor bracket material; if there are bubbles in various positions, it may be due to insufficient pretreatment or problems with the autoclave processing technology. The debonding problem is more complicated. Thinning of the film, poor fit of the glass, stains on the surface, humidity in the autoclave, or excessive moisture content of the film may all cause debonding.Performance and quality may also go wrong. The decline in impact resistance is related to the bonding strength, thickness of the film and glass, brand and model of the film, and even the impact test conditions. Unqualified weather resistance may be caused by poor sealing of the edges after preheating and prepressing of the glass, or errors in the operation of the autoclave process and excessive moisture content in the middle layer, which leads to bubbles and affects the service life.In-depth investigation of the causes of these defects, raw materials are the key factor. The uneven quality of the original glass, unstable film quality and substandard moisture content, and different performance of films of different brands and models will all bury hidden dangers for the product. In the production process, incorrect parameter settings and irregular operations such as lamination, preheating and prepressing, and autoclave processing can also easily lead to defects. Environmental factors should not be underestimated. Temperature, humidity, and ultraviolet rays during production, storage, and use will invisibly affect the quality of laminated glass. Insufficient skills, lack of responsibility, and illegal operation of operators are the direct human factors that cause defects.There are many solutions to these problems. For appearance defects, it is necessary to strictly control the quality of the original film, cooperate with high-quality suppliers and establish a traceability system. Scratches and water marks can be solved by keeping the platform clean, reasonably setting the parameters of the edge grinder, and adjusting the position of the wind knife. For bubble problems, it is necessary to extend the cooling time of the autoclave, replace the bracket material, and optimize the processing technology. To solve the debonding problem, it is necessary to improve the loading method, control the glass fit, ensure the quality of cleaning and drying, and strictly control the autoclave environment and film storage environment.In terms of performance and quality defects, the impact resistance is reduced, and the bonding strength can be checked, the moisture content of the film can be controlled, and the test conditions can be standardized. If the weather resistance is unqualified, it is necessary to ensure the sealing of the glass edge, optimize the autoclave process, and control the moisture content of the middle layer.In short, only by starting from raw material procurement, production process optimization, environmental control, personnel management and other aspects, and strictly controlling each link, can the defects of laminated glass be effectively reduced, product quality can be improved, and the market demand for high-quality products can be met.