The full name of PIR is polyisocyanate Foam, and the Chinese name is "polyisocyanuric acid", also known as "polyisocyanuric acid ester Foam PIR" or "tripolyester PIR". PIR is made of isocyanate reacting with polyether after catalysis, and its physical and fireproof properties are better than those of general polyurethane. It is an ideal organic low temperature thermal insulation material with low thermal conductivity, light weight, shockproof and strong adaptability. It is widely used in LNG, ethylene, cold storage and other industries.
Thermal conductivity curve of PIR material at different temperature is as below:

Our PIR products can meet the requirements of
| No. | Item | Unit | Standard | Technical parameters | ||
| 1 | Density | kg/m³ | ASTM D1622 | ≥40 | ||
| 2 | Closed Cell Ratio | % | ASTM D6226 | ≥90% | ||
| 3 | Water Absorption by Vol | % | ASTM C272 | ≤1% | ||
| 4 | Thermal Conductivity | W/m.K | ASTM C177 | 24℃ | ≤0.029 | |
| -46℃ | ≤0.027 | |||||
| -101℃ | ≤0.022 | |||||
| 5 | Cl content | ppm | ASTM C871 | ≤60 | ||
| 6 | Water Vapor Permeability | porm-inch | ASTM E96 | ≤3.5 | ||
| 7 | Compressive Strength | kg/cm² | ASTM D1621 | ≥240 | ||
| 8 | Flame Spread Index | ASTME84 | FSI | ≤25 | ||
| 9 | Thermal Surface Performance | ASTMC591 | passed the 149℃ test | |||
| 10 | Imensional stability, max % linear change | % | ASTMC 591 | 158 + 4°F (70 + 2°C), 97 + 3 % relative humidity | 4 | |
| −40 + 6°F (−40+ 3°C),ambient relative humidity | 1 | |||||
| 212 + 4°F (100 + 2°C), ambient relative humidity | 2 | |||||