The secret of spraying rigid foam polyurethane exterior wall exterior insulation system technology

Polyurethane rigid foam roof, exterior wall waterproof insulation integrated system After the building structure is roofed, the insulation and waterproofing of the roof is a very important project. Traditional practice insulation and waterproofing are two systems, each of which is constructed, and the superposition of the two materials constitutes a waterproof insulation system for the roof. In the actual construction project, due to the influence of a variety of factors, there are often some quality problems, resulting in damage to the building, thereby destroying the waterproof insulation system of the roof.

Polyurethane spraying exterior wall insulation construction process:

1. The ambient temperature during spraying construction should be 10-40 degrees, the wind speed should not be greater than 5m/s (level 3 wind), the relative humidity should be less than 80%, and no construction should be carried out in rainy days. When the construction environment temperature is lower than 10 degrees, reliable technical measures should be adopted to ensure the spraying quality.

2. The distance between the spray gun head and the working surface should be adjusted according to the pressure of the spraying equipment, and should not exceed 1.5m; the speed of the spray gun head should be uniform during spraying. During the operation, it is necessary to confirm that the surface of the polyurethane rigid foam sprayed on the previous layer does not stick to the hands before spraying the next layer.

3. The polyurethane rigid foam insulation layer after spraying should be fully cured for 48-72h before the construction of the next process.

4. When spraying the polyurethane rigid foam insulation layer with leveling materials such as plaster slurry, the cut glass fiber mesh (or steel wire mesh) should be pressed into the plaster with an iron trowel, and the lap width of the adjacent mesh (or steel wire mesh) is not less than 100mm; The mesh (steel wire mesh) should be laid flat, without wrinkles, empty drums and warped edges; The positive corner should be used as a corner protection.

5. After spraying, before the construction of the next process, the polyurethane rigid foam insulation layer should avoid rain, and the rain should be thoroughly dried before the next process construction.

The spraying rigid foam polyurethane exterior wall insulation system technology makes full use of polyurethane's excellent thermal insulation and waterproofness, and heat insulation, fire prevention, crack resistance and other properties. While ensuring quality, the construction efficiency is also high.

Thermoplastic Polyurethane (TPU) is a type of elastomer that is known for its flexibility, durability, and resistance to abrasion, oil, and chemicals. It is a versatile material that can be used in a wide range of applications, including footwear, automotive parts, industrial seals, medical devices, and consumer electronics.