In the past ten years, polyurethanes are rapidly used in various fields of industrial production, such as refrigerators, refrigeration, construction and other industries. Polyurethane rigid foam panel (referred to as PU rigid foam) has the characteristics of high bulk density, low water absorption, good dimensional stability at low temperature or high temperature, long service life and excellent thermal insulation performance. In particular, polyurethane foam panel with widely use, easy to use and good in heat preservation effect.

1. Types of polyurethane panels

For the building applications, polyurethane panels can be classified into ordinary polyurethane panels and polyurethane sandwich panels according to the condition of the products; they can be divided into continuous panel production lines and discontinuous production lines according to the foam molding process. Intermittent panel material requires the foaming material to be filled with a thin and large volume cavity in a relatively short period of time, requiring excellent fluidity of the foaming system, good density distribution of the panel and excellent dimensional stability; continuous panel The foaming parameters are required to have suitable compatibility with the production line speed, and have excellent mold release properties in the later stage. In response to the above specific requirements, we have developed a foaming material system suitable for various production lines using special polyether materials and a suitable catalytic system, which are used in some well-known domestic production lines.

2. Features

2.1 Stability Light weight, high strength, good dimensional stability

2.2 Strong adhesion Polyurethane rigid foam for steel, aluminum, stainless steel and other metals, wood, concrete, asbestos, asphalt, paper and polyethylene, polypropylene, etc. Most plastic materials have good bond strength. The strength of the bond between the foam and the face material directly affects the practical effect of the sandwich panel.

2.3 Excellent thermal insulation properties Polyurethane rigid foam has high closed cell ratio and extremely low thermal conductivity, so polyurethane rigid foam has the best thermal insulation performance in current building materials. The data shows that the use of polyurethane sandwich panels can save 60% of the heating costs of the exterior wall without insulation.

3. Continuous panel process Continuous production of sandwich panels can greatly improve production efficiency.