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  • How to choose the hollow glass raw materials?

    With the rapid development of China's infrastructure and urban construction, to the construction of energy-saving requirements more and more high, theinsulating glass in building energy conservation plays an important role, the quality problem of the hollow glass is paid more and more attention. Hollow glass since 60's of last century in China started since, its production has experienceddouble glass, double glass, simple manual single sealed, double sealing andappears in recent years combined rubber strip type insulating glass process.After nearly 40 years of development, the product and the market has yet to mature.

    The influence factors of hollow glass quality are mainly in the selection of raw materials and manufacturing process. The raw material quality will directly affect the quality and service life of the hollow glass. At present, there are mainly three kinds of hollow glass domestic aluminum channel type: single sealing, aluminum groove type double sealing, composite sealing rubber strip type insulating glass.Aluminum channel type single seal because of its poor sealing, easy to enter moisture, resulting in glass condensation, frost, short service life, has been eliminated gradually.

    The raw materials include glass, hollow glass, aluminum bar inserting angle, butyl rubber, two-component polysulfide rubber or silicone chamber glue, desiccant,composite sealant.

    Choose a, glass

    1, the manufacturing of hollow glass sheet of glass can be clear float glass,coated glass, tempered glass, laminated glass etc.. Avoid using common plate glass, transparency and strength of ordinary flat glass are not up to the requirements. The original piece of glass must be consistent with therequirements of relevant standards, qualified before use.

    2, different manufacturers, different batches of the glass should first check thecolor difference before cutting, the large color difference of glass are respectively used for different projects or different building facade.

    Dimensions should be strictly implemented according to the requirements of the drawings 3, cut glass, at the same time, the operator should pay attention to the glass surface, without obvious defects such as scratches, bubbles.

    By two, aluminum strip, inserted angle

    1, aluminum strip thickness should be in 0.30mm ~ 0.35mm, the thickness should be uniform, uniform distribution of air hole. Aluminum strip must be approved byanodic oxidation treatment or decontamination treatment, be sure to use good quality, higher grade products, improve the utilization rate of the aluminum strip.

    2, inserted angle size should be selected, surface should be clean.

    Three, the desiccant

    Hollow glass is currently use desiccant mainly has three types: 1, the volatile matter absorption ability better; 2, the inert gas adsorption of the lowest; 3, the common molecular sieve. Users should consult the manufacturer according to their own needs, choose a suitable molecular sieve. At the same time, molecular sieve have appropriate size (1mm ~ 1.5mm) and hardness. The use of molecular sieves environment should be dry, avoid damp and long time exposed, in order to ensure the quality of the insulating glass.

    Choose four, sealant

    1, butyl rubber:

    Butyl rubber is aluminum strip type insulating glass seal first road, it is a kind ofhot melt adhesive, with very low water vapor transmission rate (the lowest in the hollow glass glue) and high viscosity, is the most effective barrier between thealuminum side and glass blocking water vapor, but it required by the special machine heating, pressurizing on both sides of the aluminum, extrusion coatingat.

    Many domestic butyl rubber manufacturers at present, but the production ofrubber, the heating temperature, pressure are not the same, and some can not even use machine coated, often resulting in interruption due to impurities. This requires the user to choose good quality products, at the same time, a clear understanding of the requirements of the use of it.

    2, polysulfide rubber:

    Polysulfide rubber is the amount of insulating glass sealant in the largest one,polysulfide rubber has good oil resistance, solvent resistance and sealing.Polysulfide rubber to metal oxide as a curing agent, using polymerization, two kinds of component ratio of about 1 to 10, the proportion and uniformity on effectinfluence is not too large, so the glue machine coated also artificial hand painted.

    Requirements for the selection of polysulfide rubber: a chromatic aberration between distinct; valid for more than half a year; anti ultraviolet ability; have goodflowability and elastic.



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