Hollow glass condensation will reduce the quality of products, affecting the normal insulation and sound insulation effect, the following full-automatic sealant manufacturers will give you an analysis of the three conditions to promote the dew point of hollow glass, hoping to help you!
1. Sealant is extruded too loosely or there are mechanical foreign bodies in it.
Two elastic sealants are used to combine hollow glass with aluminium tube spacer. One layer is sealed with butyl rubber and the second layer is sealed with structured silicone rubber. In the actual operation process, if there are mechanical foreign bodies in the sealant or when the sealant is extruded too loosely, the capillary is formed in the gel, and there is pressure difference or humidity difference between the inside and outside of the middle layer, the moisture in the atmosphere enters the middle layer of the hollow glass, which leads to the increase of water content in the middle layer of the hollow glass.
2. Water vapor enters the middle air layer through sealant
Homogeneous polymer is usually used as sealant, but the polymer is not completely airtight. The fugacity difference (pressure difference or concentration difference) between the two sides of the polymer promotes the isothermal diffusion of the polymer. The main diffuser of sealant for hollow glass is water in atmosphere. The gas permeability coefficient (air tightness) of polymer is an important reason for water vapor diffusion. The water diffusion caused by the thickness of adhesive layer and the difference of water vapor pressure inside and outside the air is an important factor for the loss of effectiveness of hollow glass.
3. The ability of desiccant to absorb water effectively is low.
The desiccant not only absorbs the moisture of the insulating glass sealing parts in the middle layer during installation, so that the qualified initial dew point of the insulating glass can be formed, but also continuously absorbs the moisture dispersed into the atmosphere through the rubber layer, and maintains the qualified dew point.
If the desiccant has a poor function of absorbing water and can not effectively absorb the water diffused into the atmosphere, it will make the water accumulate in the atmosphere, raise the water pressure, and raise the dew point of the hollow glass.
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