insulated roof panel pu sandwich panel Polyurethane Pu Sandwich Panel

The production process of polyurethane sandwich panel mainly includes the steps of raw material preparation, mixing and foaming, molding and 

cutting and packaging. The specific process is as follows:

1.Preparation of raw materials: Calculate the quantity of raw materials required according to the actual needs, including polyurethane raw materials, 

steel plates, panels and so on.

2.Mixing and foaming: Mix the polyurethane raw materials and other materials according to the proportion and evenly stirred into the foaming 

machine for foaming treatment, forming a uniform bubble structure.

3.Forming and cutting: put the foamed sandwich panel into the mold for forming treatment, and cut and subdivide it into the required specification 

size according to the actual need.

4.Packaging and Inspection: The molded sandwich panels are packaged to ensure their quality and integrity, and the necessary inspections are carried 

out to ensure that the products meet the relevant standards and requirements.

Performance Characteristics

1.Excellent heat preservation and insulation performance: polyurethane sandwich panel has extremely low thermal conductivity, usually between 0.02 

and 0.024 W/(m-K), which makes it an ideal material for building heat preservation and insulation. Whether it is cold winter or hot summer, it can 

effectively keep the indoor temperature stable and reduce energy consumption.

2.Good waterproof and moisture-proof performance: Polyurethane core belongs to a closed-cell structure with good non-absorbent water and water 

vapor permeability resistance, which can effectively prevent water intrusion and protect the interior of the building from moisture.

3.High flame retardant performance: the core material of polyurethane sandwich panel is flame retardant, its oxygen index is not less than 26, it will not 

melt when burning, and there is no smoke and no high temperature decomposition of droplets, which provides a strong guarantee for the safety of the building.

4.High mechanical strength: polyurethane sandwich panels have high compressive, folding and impact resistance, and can withstand a certain degree of 

external force without being easily damaged, ensuring the stability and durability of the building structure.

5.Flexible and convenient installation: polyurethane sandwich panels are light in weight and easy to construct, with flat cuts on the panel surface and 

seamless surfaces between the panels through the seam treatment, so that they can be quickly installed and put into use.

6.Environmental protection and energy saving: polyurethane sandwich panels can be recycled and laid, and the production process is environmentally 

friendly and non-polluting, in line with the requirements of modern construction on green energy saving.