Insulating glass sealing material is an important component to prevent the escape of hollow gas, and "sealant", as its name implies, mainly plays a sealing role. Sealing of insulating glass, five performance indexes in GB/T11944-2002 standard of insulating glass. Except that ultraviolet radiation is used to test whether the insulating glass sealant contains organic volatiles that affect the line of sight, the other four indicators, "sealing performance, initial dew point, high temperature and high humidity, and climate cycle", are used to test the sealing performance of insulating glass in various environments.
As we know, a qualified insulating glass product not only needs standardized operation technology, but also needs sealing materials that can meet the performance requirements of insulating glass. Different insulating glass sealants have different production technologies and comprehensive properties due to their different properties. Let's take a look at what should be paid attention to in the construction process of insulating glass sealant.
There are also some rigorous steps in the construction process of sealant, including glass cutting and cleaning, spacer cutting and cleaning, selection and filling of desiccant, spacer mounting, laminating and gluing. Some necessary links must be noted:
1. Two-way sealant must be compatible with glass and spacers; The second glue should ensure the mixing quality of two components and do butterfly test;
2. a seal must be continuous and uniform;
3. The second seal must be continuous and uniform, and all links in the production of insulating glass will directly or indirectly affect the construction quality of insulating glass sealant. And completely contact with a sealant;
4. The correct ratio of polyisobutylene adhesive to the second sealing structural adhesive is 135. The spacer frame must be placed in parallel with the glass edge at equal distance. Some sealants will be mixed with oil. Due to the great heat loss of the oil-mixed insulating glass sealant, after accelerated aging experiments, the surface of the oil-mixed insulating glass sealant has cracked, indicating that its durability will be greatly reduced, which will have a serious impact on the service life of insulating glass. It can be seen that the quality of sealant determines the vacuum performance of insulating glass.
