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Winter silicone structural adhesive will encounter what problems

The solution: If users want to construct in low temperature environment, it is recommended to use a small area before the use of plastic test, and peel adhesion test to confirm the silicone structural adhesive can be cured, good adhesion, the appearance of no problem Large area use. However, the use of ambient temperature below 4 ℃, the structure is not recommended sealant construction. If the construction of the plastic factory conditions, can be considered through the use of structural sealant to improve the temperature and humidity environment. 2. Structural sealant bonding problems

With the temperature and humidity decreased, accompanied by slow curing, there are structural sealant and substrate bonding problems. Our Baiyun licensing silicone structural sealant products using the environmental requirements: temperature 10 ℃ ~ 40 ℃,

Relative humidity 40% ~ 80% of the clean environment. Exceeding the minimum temperature requirements above, bonding speed slows down, with base

The material is fully bonded for an extended period of time. At the same time, when the temperature is too low, the wettability of the surface of the adhesive and the substrate is reduced, and the substrate surface may have fog or frost that can not be easily detected, which affects the structural adhesiveness between the adhesive and the substrate. The solution: the temperature is lower than the minimum structural temperature of the structural sealant 10 ℃, the structure of structural adhesive sealant bonding substrate in the actual low temperature construction environment to do the adhesive test to confirm good bonding and then construction. The structure of the factory beating structure sealant, but also by improving the structure of sealant using the environment temperature and humidity to speed up the structural sealant curing, but also need to extend the conservation time. 3. Structural sealant thickening

As the temperature decreases, the structural sealant will gradually thicken and fluidity will become smaller. For two-component structural sealant, structural sealant thickening, the pressure will be increased by the plastic machine, structural sealant extrusion smaller. For one-component structural sealant, structural sealant thickened, plastic guns extrusion structure sealant pressure increases, manual operation may find it time-consuming and laborious.

The solution: If there is no impact on the construction efficiency, low temperature thickening is normal, no need to improve measures. If the impact on the construction efficiency, you can consider the use of structural sealant to improve the temperature or the use of some auxiliary heating measures, such as the structure of sealant stored in advance in the greenhouse or air-conditioned room, plastic workshop to install heating and heating to improve the plastic environment temperature Wait. In addition, you can choose the appropriate glue tools, such as thrust large manual glue gun or pneumatic glue gun, electric glue gun. 4. Weathering sealant from the drum - the appearance of uneven

When the northern autumn low temperature, the temperature difference between day and night is also large. Weather-resistant sealant is prone to druming when used on aluminum curtain walls, mainly due to the slow curing of weather-resistant sealants at low temperatures, longer time required to cure the surface to a sufficient depth, If the depth of the seam changes (which is usually due to the thermal expansion and contraction of the panel) is not large enough, the surface of the seam will be affected and unevenness occurs. The uneven surface of the seam after the final curing, the interior is solid, not hollow, will not affect the long-term weathering sealant sealing performance, only the appearance of plastic seams affect the smoothness.