The basic manufacturing process of insulating glass consists of glass cleaning, molecular sieve screening, butyl sealant coating, splicing, coating second to sealing glue. Each link is related to the skill of the operator and the quality of the process.
1, glass cleaning
Cleaning glass is the first step in the production of insulating glass and one of the most important aspects to ensure the sealing of insulating glass. If the oil stagnation and sweat on the glass cannot be thoroughly washed away, the adhesion of the sealant to the glass is greatly impaired, thereby reducing the sealing effect of the insulating glass. It should be emphasized that the conditions considered by us to select desiccants, sealants and spacers are based on the premise that the glass is cleaned, and the sealing of the insulating glass is transferred to a considerable extent by the cleanliness of the glass. Glass cleaning is a primary measure of the quality of the appearance. However, in practice, people often pay insufficient attention to cleaning glass and must correct it.
2, the choice of desiccant
The role of the desiccant is mainly three: adsorption of moisture sealed in the air; adsorption of volatile organic solvents and adsorption of water vapor into the air layer during the life of the insulating glass. The purpose is to maintain a satisfactory initial dew point for the insulating glass. Therefore, the selection of a suitable desiccant condition must simultaneously satisfy the three functions that the desiccant should have. If the desiccant has poor adsorption capacity and cannot effectively adsorb the moisture that has entered the air layer by diffusion, the moisture will accumulate in the air layer, the water pressure will increase, and the dew point of the insulating glass will rise, so the possibility of atomization is great. When selecting desiccant, they must consider their respective properties. The choice of desiccant has a direct relationship with the selected hollow glass glue. It must be considered together.
The edge of the insulating glass fails to seal, which means that the window loses its proper function. Not only does the design of the window fail to achieve energy-saving performance, but the consumer cannot see the outside through the layer of misty air, affecting the transparency of the insulating glass and reducing it. Insulation effect, long-term fogging will cause mildew or alkali precipitation on the inner surface of the glass, resulting in a white shift, which seriously affects the appearance quality of the insulating glass. It can be seen that the selection of high quality insulating glass sealant is the primary and key to prevent the atomization of the insulating glass. The selected insulating glass sealant should meet the requirements of national or industry standards, and the first and second sealants of the double-pass insulating glass should be suitable and not mutually soluble or reactive, otherwise the tourists can cause contamination or even aging of the glass surface.
3, double-channel insulating glass coating - splicing - coating
The splicing is the middle ring of the double-pass hollow glass, and the coating of the butyl rubber before the film determines the overall quality of the insulating glass. Therefore, the production process should be strictly controlled during production, to prevent leakage coating, gel breaking phenomenon and negligence of sealing. There must be no hidden danger of gas leakage, and the first tube that is sealed is sealed, and the second sealing glue is applied after lamination. According to the manufacturer's regulations, a reasonable ratio can be used to make the two components fully mixed, the glue is accurate, avoid the lack of glue and multi-glue, and the final process of double-pass insulating glass production is successfully completed. If there is a gap between the two sealants, it will cause air leakage. At the same time, it should pay attention to the application of the thin second sealant. After installation for a period of time, it will be affected by the change of ambient temperature and the slick pressure of the sun. Cracks will form (even if very small cracks are present), and moisture may slowly enter the glue layer, forming atomization, losing its seal and losing the sealing effect.
The finished double-channel insulating glass requires a period of parking period of about one week, so that the double-channel insulating glass sealant has sufficient time for chemical bonding to achieve an optimal sealing state. If the parking period is too short, the sealant does not have sufficient time to bond. After handling, vibration, sun exposure, especially rain, the sealing effect of the sealant will be greatly reduced. In severe cases, fog will occur in a short period of time. The phenomenon.
4. Assembly of insulating glass
When assembling insulating glass, if the insulating glass sealant is in contact with other sealing materials (especially the curtain wall weatherproof sealant), and these sealing materials contain plasticizing components capable of dissolving butyl sealant, these plasticized components will pass through the hollow The second seal of the glass migrates to the surface of the first sealant of the insulating glass, thereby dissolving the first sealant to cause thinning and runny. Therefore, it is necessary to do the corresponding compatibility test when assembling the insulating glass, and the matching sealing material compatible with the insulating glass sealant is selected, and the sealing material of the same manufacturer is preferably used to reduce the occurrence of such a phenomenon.
In short, solving the problem depends on each factor, reducing and eliminating fogging, which requires these links to be combined.
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