The dew point of insulating glass refers to the temperature at which the humidity of the air sealed in the air layer reaches saturation. If the temperature is lower than that, the water vapor in the air layer will condense into liquid or solid water. What do you do in this situation? Auman environmental protection glass glue manufacturers for you lightning protection!

Obviously, the higher the water content, the higher the dew point temperature of the air. When the temperature of the inner surface of the glass is lower than the dew point of the air in the air layer, the water in the air will condense or frost on the inner surface of the glass (the dew point is lower than -40℃ in the Hollow Glass standard GB/T 11944-2012). When the outside water enters the hollow glass cavity, the dew point of the hollow glass will gradually rise after the moisture absorption agent added in the production of hollow glass is consumed. In order to avoid premature fogging of insulating glass, the following aspects should be controlled in the actual production process:

          1. Control of raw materials

          1, the selection of high quality butyl sealant (butyl sealant, composite rubber strip, warm edge rubber strip, hot melt adhesive), butyl sealant mainly plays the role of blocking water vapor through, some manufacturers in order to reduce costs, the use of inferior raw materials, resulting in sealant performance decline;

          2. If composite rubber strip products are not used for a long time, dew point downward test should be used to detect whether the rubber strip fails;

          3, groove aluminum insulating glass, one is to control the quality of molecular sieve, can do simple detection according to the temperature rise test; The second is the quality of the aluminum partition strip, the weld should not be cracked, to avoid water entering the hollow glass through the weld, the air hole should be unobstructed, to ** molecular sieve play moisture absorption ability.

          4. All kinds of raw materials (aluminum spacer, molecular sieve, pin, adhesive strip) should be stored in a dry place.

The above information is provided by Auman environmental protection glass glue manufacturer

          2. Production environment control

          In the construction environment (especially in the composite area, molecular sieve filling area and code strip area), the humidity should be controlled below 55% and the temperature should be controlled at 15-25℃ to reduce the initial water vapor content in the hollow glass and reduce the amount of water absorbed by the molecular sieve exposed to the air

          Three, production technology

          1, groove aluminum double channel sealing production insulating glass as far as possible to use bending aluminum strip, and the use of pin type groove aluminum double channel seal, must be sealed at the pin with butyl glue, avoid water vapor through the pin part of the seal weak point into the hollow glass;

          2. When butyl adhesive is coated, the broken adhesive should be regummed. When the bending aluminum strip is used to make hollow glass, the molecular sieve filling hole should be sealed with butyl adhesive;

          3. Increase the thickness of butyl rubber layer. The thickness of the butyl rubber layer of the groove aluminum double-channel seal is generally 3-4mm, and the thickness of the rubber strip insulating glass seal layer is between 7-9mm, so the sealing effect is greatly improved.

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