The Development History Of Polyurethane Sandwich Panels

The development of polyurethane sandwich panels can be traced back to the 1940s, and has experienced significant technological progress and application expansion in the following decades.

Origin and Development
Polyurethane sandwich panels were first produced in the United States in 1947, mainly used to cover house roofs and insulation. After the end of World War II, European countries began to vigorously promote prefabricated wallboard buildings in order to quickly repair the damage to buildings caused by the war, which also promoted the use of sandwich panels. In the early 1950s, Bayer Company in the United States conducted a pilot test of polyester-type soft polyurethane foam plastics and subsequently developed a technology for continuous production of the soft polyurethane foam plastics.

Technical Progress and Application Expansion
In the early 1970s, the research on thermoplastic polyurethane elastomers (TPU) was successful, which further enriched the application range of polyurethane materials. In the 1980s, the advent of polyurethane engineering plastics made the polyurethane industry present a new look to the world. In the 1990s, polyurethane spray elastic materials developed rapidly and became the main coating in large-area coating projects.

Modern applications
Modern polyurethane sandwich panels are widely used in many fields such as construction, transportation, furniture, etc. Its excellent properties include high strength, good thermal insulation, light weight and high strength, making it an ideal material for exterior walls, roofs and partitions in the construction field. In addition, polyurethane sandwich panels also have good corrosion resistance and a long service life, further consolidating its position in various applications.