Considerations for polyurethane spraying in winter construction

Polyurethane spraying generally has little effect on winter construction. However, when the temperature is low, the adhesion of poor quality polyurethane spray and wall surface is poor, looks like honeycomb cotton, and will fall off later. Today to give you some attention to winter construction polyurethane spraying insulation materials.

CRP_0037

1. PU spray construction is best to start with the temperature: find a way to heat the wall, the worst case is the need for a lot of heating materials, or try to build around noon when the temperature is slightly higher.

2. Avoid heat dissipation and do a good job of windproofing to avoid a drop in performance during the foaming and curing process.

3. The appearance of the material: pay attention to improve the reaction activity, mixing when considering the amount of foaming agent and the coordination of low temperature.

4. Construction temperature should be above 5, construction should keep the construction environment ventilated, try not to work in low temperature conditions.

5. Unused components (especially component A), the lid of the barrel must be covered tightly to prevent moisture absorption and curing, mixed materials must be consumed within a certain period of time.

6. As the temperature decreases, the dissolution rate of the mastic powder in the polymer mortar may decrease, and the mixing time should be extended when preparing polymer mortar. The cement ratio should be used within the specified range, and the material should not be over-mixed, otherwise the solidification time will be extended.

The above is for you to introduce the polyurethane spraying in the winter construction precautions, in the face of increasingly cold weather, we together to comply with the construction of the regulations in order to achieve the desired results.


Post time: Dec-28-2022