What is PIR insulator?

     PIR is the abbreviation of “Polyisocyanurate” or it is called PIR Polyiso (PUR Polyurethane). The properties are similar to PU Foam with the specialty of self-extinguished properties and the smoke is at lower value. However, PIR will have the disadvantages in having more dust. In foreign countries, it is popularly used as the PIR more as it gives the safety more both in the quick extinguishing and low volume of smoke. This will be developed by adjusting the proportion in mixing in order to make the MDI reaction higher than Polyurethane and use polyol obtained from polyester instead in the reaction. Moreover, the reactant and additive used in PIR formula is different from Polyurethane.

 

Special properties of PIR

      1. As the reaction of PIR occurrence is at the temperature higher than the reaction of PUR, the molecule structure is strong making PIR be stronger than Polyurethane (from the report, it is found to use the temperature of over 200 °C in order to destroy the chemical bond of PIR while PUR is used only 100-110 °C).
      2. PIR is suitable for being used in the residence as it contains the value of smoke occurrence less than PUR. PIR has the self-extinguishing value of lower than 25 but giving the value of smoke occurrence lower than 50 whereas Polyurethane has the self-extinguishing value of lower than 25 and the value of smoke occurrence up to 150-350. PUR has less flexibility and is in powder less than PIR.
      3. The pressure resistance value per the density is similar such as 2 pounds of Poly Iso will have the pressure resistance value per the density around 20 psi. The value of insulation is similar at 6.0 per inch averagely.