How do the polyurethane sandwich panels be PIR or PUR separately?
PIR composite sheet refers to the polyurethane foam as a core commonly used is the polyester polyol, high isocyanate index (250 or more), with or without the use of flame retardant formulations, the foam skeleton structure is from the carbamate Chain and carbamate modified isocyanurate segments, the product can be used at below 150 degrees Celsius.
PUR and PIR refer to the chemical composition of polyurethane rigid foam. Regardless of PUR or PIR can be used as a core material and a variety of rigid or flexible materials for the surface material through a variety of processing methods from complex.
PUR composite sheet refers to the polyurethane foam as a core commonly used is a polyether polyol, a lower isocyanate index and flame retardant formulations, the foam skeleton structure is composed of carbamate segments, the product Can only be used below 100 degrees Celsius.
