[China Glass Net] Insulating glass is made up of two or three pieces of glass. There is a desiccant between the glass and the glass. The insulating glass has higher safety than the single piece of glass, but after the single piece of glass is damaged. It is also necessary to replace the entire product.
Since the use of insulating glass, its production has experienced double glass, simple double glass, manual single-channel sealing, double-channel sealing and the process of composite rubber-type insulating glass which has appeared in recent years. After nearly 40 years of development, the insulating glass market has gradually matured. With the emphasis on building energy conservation in China, the quality of insulating glass has been paid more and more attention. What factors affect the quality of insulating glass?
At present, there are three main types of insulating glass in China: 1. Single-channel aluminum sealing; 2. Aluminum double-sealed sealing; 3. Composite sealing strip insulating glass.
The single-channel sealing of the slot aluminum is gradually eliminated due to its poor sealing performance and easy entry into the moisture, resulting in condensation and frosting of the glass and short service life. The raw materials of the latter two kinds of insulating glass are mainly: glass, aluminum strip, gusset, butyl rubber, two-component polysulfide or silicone silicone, desiccant, composite sealant strip.
The following small series and everyone simply share the five elements that affect the quality of insulating glass!
First, the choice of original glass
1. The original sheet glass for producing the insulating glass may be a colorless float glass, a coated glass, a tempered glass, a laminated glass or the like. The use of ordinary flat glass should be avoided, and the transparency and strength of ordinary flat glass can not meet the requirements. The above-mentioned original glass film must meet the requirements of the corresponding standards and can only be used after passing the inspection.
2. Different batches of glass from different manufacturers first check for color difference before cutting.
3. The glass cutting size should be strictly implemented according to the drawings. At the same time, the operator should pay attention to the glass surface, and there should be no obvious defects such as scratches and bubbles.
Second, the selection of aluminum strips, gussets
1. The thickness of the aluminum strip should be between 0.3-0.35mm, the thickness should be uniform and uniform, and the venting holes should be evenly distributed. Aluminum strips must be bent by anodizing or decontamination treatment. Be sure to use high quality and high grade products. Improve the utilization of aluminum strips.
2. The gusset size should be selected and the surface should be cleaned.
Third, the use of desiccant
At present, there are three main types of desiccant for insulating glass:
1. Better absorption of volatiles;
2. The amount of adsorption to the inert gas is low;
3. Ordinary molecular sieves.
The user should select the appropriate molecular sieve according to his own needs, and the molecular sieve should have a suitable particle size (1-1.5mm) and hardness. In addition, the environment in which the molecular sieve is used should be dried, and the packing molecules should be used within 1.5 hours to ensure the quality of the insulating glass.
Fourth, the choice of sealant
Butyl rubber
Butyl rubber is the first seal of aluminum strip insulating glass. It is a hot melt adhesive with a low water vapor transmission rate (lower in hollow glass plastic). It has high viscosity and is aluminum strip side and A relatively effective barrier against moisture in the glass, but it needs to be heated, pressurized, and extrusion coated on both sides of the aluminum strip by a special machine.
At present, there are many manufacturers of domestic butyl rubber, but the heating temperature and pressure of each rubber produced by the company are not the same. Some manufacturers can not even use the butyl rubber, which is often caused by impurities. This requires the user to select a good quality product and understand its usage requirements.
2. Polysulfide
Polysulfide rubber is one of the most widely used hollow glass sealants. The polysulfide rubber has good oil resistance, solvent resistance and sealing properties. Polysulfide rubber should be polymerized with metal oxide as curing agent. The ratio of the two components is about 1:10. The mixing ratio and uniformity have little effect on the effect. Therefore, the glue can be applied by hand or by hand.
Selection requirements for polysulfide rubber: color difference between two components; effective period of more than half a year; strong UV resistance; good fluidity and curing flexibility.
3. Silicone rubber
Silicone sealant has structural, aging and UV resistance, but its weakness is high water vapor transmission. Therefore, silicon silicone rubber is suitable for use in places with strong light and poor environment, such as glass curtain walls, and must be sealed with butyl rubber. Silicone rubber, in the past, China has long relied on imports. Now the State Economic and Trade Commission has set up a special group of silicon silicone rubber to carry out safety certification for structural adhesives. At present, many enterprises in China have passed the certification.
Fifth, the use of composite sealing strips
Composite sealant strips are a composite seal material developed by American chemists in the 1980s. It is an insulating glass raw material integrating support skeleton (wavy aluminum Belt), sealing (butyl rubber) and drying (drying agent). The advantages are simple operation process, less waste of raw materials, less personnel, and low management cost. The operating environment is good; the disadvantage is that the strip absorbs moisture slowly and must have special equipment. At present, the price of the rubber strip is limited by the output. The selection of the composite sealing strip should consider the surface smoothness, the quality of the aluminum strip, the content of the glue, and the moderate viscosity.
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