The Silent Revolution of PIR Materials: Performance Breakthroughs and Circular Practices in Building Energy Saving

  In the field of industrial insulation, polyisocyanurate (PIR) foam is reshaping industry standards with disruptive performance. Its closed-cell rate exceeds 90%, and its thermal conductivity is as low as 0.022W/(m·K), which is 30% more energy-saving than traditional polyurethane, and its fire protection level reaches the highest certification standard of EN 13501-1. This material remains structurally stable under high temperature conditions of 200°C, making it a core solution for oil and gas pipelines and ultra-low temperature cold storage. Chinese companies' innovation focuses on three major directions: In terms of fire protection performance upgrades, a material company in Guangdong has increased the oxygen index of PIR insulation board to 32% by adjusting the isocyanate ratio, and passed the B1 certification of the National Fireproof Building Materials Inspection Center; in the field of circular economy practice, Shandong manufacturers have converted 100% of injection molding scraps into PIR recycled particles for the manufacture of fire duct brackets, reducing raw material costs by 40%; in international certification breakthroughs, Jiangsu companies have won British infrastructure orders with UKCA-certified PIR insulation boards, with profit margins increasing by 18%. The implementation of the new building energy conservation regulations, "General Specifications for Building Energy Conservation and Renewable Energy Utilization", has further stimulated the market explosion. The heat transfer coefficient limit of the wall of the cold chain logistics center has been reduced to 0.38W/(㎡·K), and the strictness of the standard has been increased by 40%. A leading cold storage board company has introduced a fully automatic production line from Europe, with an annual output of 2.5 million square meters of PIR boards. Its graphene-enhanced formula increases the compressive strength by 30%, and has been successfully applied to the Sinopec oil storage tank project to reduce energy consumption by 40%. When industrial pipelines are wrapped with a PIR insulation layer with a closed-cell rate of over 90%, this material revolution is reconstructing the energy-saving gene of Chinese manufacturing from the depths of the industrial chain.