The global trend of environmental protection and energy conservation is a key factor in the development of building insulation materials. PIR fire sandwich board and rock wool sandwich board with excellent thermal insulation, fire prevention, moisture-proof performance has been widely used in industrial buildings, civil buildings roof board, wall board, sound insulation board, air conditioning pipes and other fields. The combustion performance of polyurethane fire prevention board is divided into four grades: grade A (polyurethane edge sealing rock wool sandwich board), non-combustible material;Class B1, refractory materials;B2 grade, combustible material;B3 grade, combustible material. The following simple analyze the differences between PU board and PIR board.

3.Difference in bulk density: polyurethane PUR foam: generally 35 ~ 45kg/m3, can achieve a more satisfactory strength requirements.PIR foam: generally 45 ~ 55kg/m3, to achieve a more satisfactory strength requirements.

4.Difference of temperature resistance range: polyurethane PUR foam: generally below 110℃.PIR foam: can reach about 205℃.

5.Difference of water absorption: polyurethane PUR foam: generally 2.5 ~ 3%.PIR foam: up to 0.9%.

Weihua mechinery polyurethane board production line has been able to produce all the polyurethane fire boards from B3 to A grade through increasing research and development efforts, improving the production process and other efforts, and has successfully passed the certification of relevant certification bodies, the quality and fire requirements have fully met the national standards.

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