polüisotsüanuraat

Polyisocyanurate, often abbreviated as PIR or PUR, is a type of rigid foam insulation material widely used in the construction industry. It is formed through the polymerization of isocyanates and polyols, with a higher proportion of isocyanates compared to standard polyurethane. This chemical structure results in a thermosetting plastic with a closed-cell composition, meaning the cells are sealed and do not allow air or moisture to pass through easily.

The manufacturing process typically involves mixing isocyanates, polyols, blowing agents, and catalysts, which then react to form a solid foam. This foam is often produced in continuous processes, resulting in boards or panels of varying thicknesses. PIR insulation is known for its excellent thermal performance, offering a high R-value per inch, which translates to effective heat resistance. This makes it a popular choice for applications requiring significant energy efficiency, such as roofing, wall insulation, and cold storage facilities.

In addition to its insulating properties, PIR foam exhibits good fire resistance characteristics. The isocyanurate rings formed during polymerization contribute to char formation when exposed to flame, which helps to slow down the spread of fire. This enhanced fire performance is a key advantage over some other foam insulation types. PIR is also valued for its structural integrity and dimensional stability, maintaining its shape and insulating effectiveness over time. It is resistant to moisture and most common chemicals, further contributing to its durability and suitability for demanding environments.