The Advantages of Polyurethane Sheet

The Advantages of Polyurethane Sheet

1. The impermeability of PU sheet

Pu hard foam is a microporous foam with a dense structure, with a closed cell rate of over 92%. The whole of the seam forms a complete impermeability, and it is possible for the roof water to penetrate deeply along the seam. The Pu hard foam layer can be firmly bonded to the base layer, and its bonding strength can exceed the tear strength of the foam itself, so that the Pu hard foam and the base layer are integrated, and delamination is not easy to occur, and water penetration along the interlayer is avoided. These characteristics are not available in many waterproof membranes, so the waterproof function of Pu hard foam is unique.

2. PU sheet has good heat insulation and heat preservation performance, and the energy saving effect is remarkable

The thermal conductivity of Pu rigid foam is low, and the heat preservation and heat insulation effects are good, which is unmatched by any other roof insulation materials. In general residential buildings, Pu hard foam is used as a waterproof and heat-insulating roof, its thickness is only one-third of that of traditional materials, and its thermal resistance is nearly three times that of them.

3. The roof load of PU sheet is light.

Pu hard foam has low density and light weight, so the roof load is light, and the part of the load above the roof support plate, Pu hard foam roof is a quarter of the traditional roofing method, which is important for improving the overall structure of the house and reducing the construction cost, so it is also suitable For long-span, thin-shell roof construction.

4. The construction of PU sheet is convenient and the progress of the project is fast

Pu rigid foam roof is formed by on-site foaming. The process equipment is simple and easy to operate. It can be sprayed or poured. It can work on complex roof construction. Usually, the construction is operated by 3-4 people, and more than 20 cubic meters can be sprayed per day. The thickness of the layer is 30 mm, and it can spray more than 700 square meters per day, which is more efficient than laying traditional materials. It also reduces labor intensity, improves the working environment, and reduces environmental pollution. The Pu hard foam liquid raw material foams and expands on site with a volume of 15-18 times, so the raw material transportation volume is small. According to statistics, it can reduce the vehicle transportation cost by more than 80% compared with the use of traditional materials, and it also greatly reduces the workload of vertical transportation shifts at the construction site.

5. The engineering quality of PU sheet is good and the service life is long

The good impermeability of Pu hard foam, and the light-weight characteristics of heat insulation have laid the foundation for high-quality roofing projects. After the Pu hard foam is sprayed, a layer of polymer synthetic paint is sprayed on the Pu hard foam, which not only protects the Pu hard foam, but also plays a waterproof role. This fundamentally solves the quality problem of roof penetration in the current housing construction. Traditional roof insulation materials are easy to absorb water and moisture. The service life of conventional waterproof membranes is very short, and regular maintenance is required.

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