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    Overview of Physical Properties of Cellular Thermal Insulations

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    A comprehensive overview of the physical properties of cellular thermal insulations commonly used in the insulation industry has been developed. The insulations addressed are molded, expanded polystyrene (MEPS) and extruded, expanded polystyrene (XEPS) foams, polyurethane (PUR) and polyisocyanurate (PIR) foams, urea-formaldehyde (U-F) foams, phenolic foams, and cellular glass. Information was compiled primarily from manufacturers' literature, published documents, and private communications.

    In addition to a general listing of typical physical properties, three areas are given special emphasis. The effects of aging and mean temperature on thermal transmission properties are discussed. Moisture absorption values measured using several different methods are presented, and a tabulation of typical mechanical strength properties is included.

    The information presented is intended to serve as a general guide for comparing the physical properties of the various cellular insulations commonly used. The values are intended to be conservative; however, this may not be true for some commercially available products. Therefore it is recommended that the insulation manufacturer be contacted to obtain values for use in design.


    aging, cellular glass, cellular plastic, foam, mechanical properties, mechanical strength, moisture content, moisture effects, permeance, phenolic, polyisocyanurate, polystyrene, polyurethane, temperature effects, thermal conductivity, thermal insulation, thermal properties, thermal resistance, urea-formaldehyde, wet insulation

    Author Information:

    Strzepek, WR
    Dow Chemical U.S.A., Granville, OH

    Committee/Subcommittee: C16.22

    DOI: 10.1520/STP23302S