Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
NORMA vydaná dňa 1.12.2022
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Označenie normy: ASTM C591-22
Dátum vydania normy: 1.12.2022
Počet strán: 10
Približná hmotnosť: 30 g (0.07 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
This specification covers the types, physical properties, and dimensions of unfaced, preformed rigid cellular polyurethane modified polyisocyanurate plastic material intended for use as thermal insulation on surfaces. This insulation can be classified into six types according to its compressive resistance: Types I, IV, II, III, V, and VI. Also this insulation can be classified as Grades 1 and 2 according to its service temperature range. The thermal insulation is produced by the polymerization of polymeric polyisocyanates in the presence of polyhydroxyl compounds, catalysts, cell stabilizers, and blowing agents. Different test methods shall be performed in order to determine the thermal insulation´s following properties: density, compressive resistance, apparent thermal conductivity, hot-surface performance, water absorption, water vapor permeability, dimensional stability, closed-cell content, surface bearing characteristics, tensile strength, and leachable chloride, fluoride, silicate, and sodium ions.
Keywords:
cellular plastic, polyisocyanurate, polyurethane modified polyisocyanurate, thermal insulation ,, ICS Number Code 83.100 (Cellular materials),91.100.60 (Thermal and sound insulating materials)