Polyurethane Foam caulking agent has a wide range of applications and is often used in aluminum doors and windows Leakage prevention between plastic steel profiles and walls. In short, it occupies a relatively large position in the construction industry, and its functions are widely used. and deeply loved by manufacturers and consumers. SprayingPolyurethaneFoam caulk fell off Come downorWhat should I do if it turns yellow?
1, Polyurethane foam caulkingfalling off
In fact, it is cost-effectivePolyurethane foam caulking agent It is relatively hard and will be relatively dense after complete drying. It is not easy to cause doors and windows to fall off and walls to be hollow and dented; on the contrary, poor quality Polyurethane foam caulkingDue to the low relative density, vibrationorAfter knocking, it is easy to cause doors and windows to fall off, and the walls to be hollow and have dents.
2, Polyurethane foam caulk turns yellow
All ordinaryPolyurethane foam caulking agent‘s decomposition temperature is higher than the production and processing temperature of polyvinyl chloride. If appropriate modifiers are not used, the result isPVCdecomposition（yellow or black), ACdoes not decompose（Polyurethane foam) . Therefore, on the one hand, thickeners must be added to maintainPVC for a long time（atACwill not decompose under the use temperature), On the other hand, modifiers should be added to promote font>ACpolyurethane is foamed to lower the decomposition temperature ofAC to match.
We don’t needworry, regardless of polyurethaneFoam caulkturns yellow Still falling off. According to the above solutions, the above solutions are very effective. I hope this article can be useful to everyoneHelp.
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