[China Glass Net] The basic production process of insulating glass consists of glass cleaning, irrigation molecular sieve, butyl sealant coating, splicing, and second sealing adhesive. Every aspect is related to the choice of materials and the proficiency and processing quality of the operators.

First, glass cleaning

Cleaning glass is the first step in the production of insulating glass, and it is also one of the more important links 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. The manufacturer of the insulating glass manufacturer emphasized that the conditions considered by us to select the desiccant, sealant and spacer are based on the premise that the glass is cleaned, and the sealing of the insulating glass is to a considerable extent whether the glass is clean or not. For the transfer, the cleaning of the glass is the main measure of the quality of the appearance. However, in the current production, many manufacturers, especially small manufacturers, often pay insufficient attention to cleaning glass, resulting in a large number of unqualified products entering the market.

Second, the choice of desiccant

The role of desiccant is mainly three: 1. Adsorb the moisture sealed in the air; 2. Adsorption of volatile organic solvents; Adsorbs moisture entering 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, a qualified desiccant 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 that the possibility of atomization is extremely great. In addition, the choice of desiccant must take into account their respective properties. The choice of desiccant is directly related to the type of hollow glass glue selected. It must be considered together to consider the failure of the edge seal of the insulating glass, meaning that the doors and windows lose their proper function, not only the doors and windows The energy-saving performance of the design is not up to standard, and consumers can't see the outside through the foggy air layer, affecting the transparency of the insulating glass and reducing the heat insulation effect. The long-term fogging will cause mildew on the inner surface of the glass. Change or build alkali, produce white spots, seriously affect 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 front and second sealants of the double-layer insulating glass should be suitable and should not be mutually soluble or reacted. Otherwise, the glass surface may be contaminated or even aged.

Third, the coating of double-layer insulating glass

The splicing-coating ply is the middle ring of the double-layer insulating glass, and the application of the butyl rubber before the splicing determines the overall quality of the insulating glass. Therefore, the production process should be strictly controlled during production, to prevent leakage coating, rubber breakage and negligence of sealing. Never allow hidden dangers of gas leakage, and close the seal. When the second sealant is applied after the film is combined, a reasonable ratio is prepared according to the manufacturer's specifications, so that the two components are fully mixed, the glue is applied accurately, and the phenomenon of under-glue and multi-glue is avoided, and the finished double-layer insulating glass is successfully completed. A process. If there is a gap between the two sealants, it will cause air leakage. At the same time, attention should be paid to the application of a thin second sealant. After installation for a period of time, it is affected by environmental temperature changes, sun exposure and wind pressure. 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 double-layer insulating glass produced requires a parking period of about 3 days, so that the double-layer insulating glass sealant has sufficient time for chemical bonding to achieve a better 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 appear in a short period of time. The phenomenon.

Fourth, the 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 front sealant, thereby dissolving the front sealant to cause thinning and runny. Therefore, it is necessary to do the corresponding compatibility test when assembling the insulating glass, and the 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. Reducing and eliminating the fogging phenomenon of the insulating glass of aluminum alloy doors and windows depends on each link of the production of aluminum doors and windows, and it is necessary to closely monitor the entire production process to prevent unqualified products.

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January 22, 2023