PIR/PUR sandwich panel

PIR/PUR sandwich panel WITH GOOD HEAT INSULATON PERFORMANCE OF LIGHT POLYURETHANE AS THE INNER CORE MATERIAL, OUT.SIDE BY COLOR STEL PLATE, STAINLESS STEEL PLATE SPLINTED STORAGE BOARD, CAN REDUCE THE HEAT TRANSFER DUE TO THE TEMPERA-TURE DIFERENCE BETWEEN INSIDE AND OUTSIDE, IN ORDER TO ACHIEVE THE MAXIMUM EFFICIENCY OF THE FREEZING, REFRIGERATIONSYSTEM.

COLD STORAGE PLATE THICKNESS SPECIFICATIONS 50, 75,100, 120, 150, 200,250mm

The size specification of cold storage panel: the standard width of the hook refrigerator board is 1000mm, the standard width ofthe machine board is 1140mm, and the standard width of the roof board is 1140mm( in addition: according to your special requirements can be customized )

PIR (Polyisocyanurate Foam) is the full name of polyurethane modified polyisocyanurate. It is a foam plastic obtained by polyurethane modification of a foam called polyisocyanurate. Its performance is quite different from that of polyurethane. Polyurethane rigid foam is mainly composed of polyols and isocyanates. Polyols are divided into polyether polyols and polyester polyols. The product produced by the reaction of polyether polyols and isocyanates is PUR, and the reaction of polyester polyols and isocyanates produces polyisocyanurate (PIR for short).

PIR sandwich panels refer to polyurethane rigid foams as core materials, which generally use polyester polyols, a higher isocyanate index (above 250) and a formulation system with no or less flame retardants. The skeleton structure of the foam is composed of

carbamate segments and carbamate modified isocyanurate segments. PUR sandwich panels refer to polyurethane rigid foams as core materials, which generally use polyether polyols, a lower isocyanate index (about 110~120) and a flame retardant formulation system. The skeleton structure of the foam is composed of carbamate chain points.

PIR and PUR performance comparison

Difference in fire resistance

PUR foam: B3 grade, by adding flame retardant, it can reach B1 or B2 grade.

PIR foam: B2 grade, by adjusting the concentration of local isocyanurate ring and other formulation technologies, it can reach B1 grade.

Difference in thermal insulation performance

PUR foam: thermal conductivity is 0.022W/mK~0.026W/mK (25℃)PIR foam: thermal conductivity can reach 0.019W/mK (25℃)

Difference in capacity

PUR foam: density 38~40kg/m3, can achieve relatively satisfactory strength requirements.

PIR foam: density 40~45kg/m3, can achieve relatively satisfactory strength requirements.

Difference in temperature resistance range

PUR foam: -185℃~+110℃.

PIR foam: -196℃~+205℃.

PUR sandwich panel: long-term continuous use below +85℃.

PIR sandwich panel: (index above 250): long-term continuous use below +150℃

Difference in water absorption

PUR foam: 2.5%~3%

PIR foam: 0.9%