In recent years, with the improvement of modern home decoration level, more and more people choose aluminum alloy doors and windows to decorate. While enjoying quiet and comfortable, many friends find that how the glass of doors and windows at home will fog? Is it blurring? What's going on? This phenomenon is actually caused by the unqualified production process of insulating glass for aluminum alloy doors and windows. To understand the causes and solutions, we must first understand the production process of insulating glass.
The basic manufacturing process of insulating glass is composed of glass cleaning, molecular sieve pouring, butyl sealant coating, laminating, coating the second sealant, etc. It is related to the degree of proficiency and the quality of the processing personnel.
1、 Glass cleaning
Cleaning glass is the first link in the production of insulating glass, and also one of the most important links to ensure the sealing of insulating glass. If the oil stagnation and sweat on the glass can not be completely cleaned off, the adhesion of sealant to the glass will be greatly weakened, thus reducing the sealing effect of insulating glass.
The technician of insulating glass manufacturer emphasized that the conditions considered in selecting desiccant, sealant and spacer strip are based on the premise of glass cleaning, and the sealing of insulating glass is transferred to whether the glass is clean to a large extent, and the cleaning of glass is the main measurement standard of appearance quality. But now in production, many manufacturers, especially small manufacturers, often pay less attention to cleaning glass, resulting in a large number of unqualified products into the market.
2、 Selection of desiccant
The main functions of desiccant are as follows: 1. Adsorption of water sealed in the air; 2. Adsorption of volatile organic solvents; 3. Adsorption of water vapor into the air layer during the service life of insulating glass.
The purpose is to keep the insulating glass with qualified initial dew point. Therefore, qualified desiccant must meet the three functions of desiccant at the same time. If the desiccant has poor adsorption capacity and can not effectively absorb the water that diffuses into the air layer, it will lead to water gathering in the air layer, the water pressure will increase, and the dew point of insulating glass will rise, then the possibility of atomization will be great.
In addition, the selection of desiccant must consider their respective properties comprehensively. The selection of desiccant is directly related to the type of insulating glass glue selected, so it must be considered in combination.
The edge sealing failure of insulating glass means that doors and windows lose their due functions. Not only can the energy-saving performance of doors and windows meet the requirements, but also consumers can't see the outside through the fogged air layer, which will affect the transparency of the insulating glass and reduce the heat insulation effect. Long time fogging will cause mildew or alkali accumulation on the inner surface of the glass, resulting in white spots, which will seriously affect the insulating glass Appearance quality.
Thus, the choice of high-quality insulating glass sealant is the first and key to prevent the insulating glass from atomizing. The selected insulating glass sealant shall meet the requirements of national or industrial standards, and the first and second sealant of double-layer insulating glass shall be suitable, and shall not be mutually soluble or reactive, otherwise it may lead to surface pollution or even aging of glass.
3、 Coating laminating gluing of double insulating glass