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POLYISOCYANURATE FOAM INSULATION
ELFOAMÔT250, is a 2.5 PCF nominal density, rigid, closed cell, non-CFC blown, polyisocyanurate foam insulation supplied in cut sheets or bunstock for a variety of thermal insulation applications. Although similar in physical form to polyurethane foam, polyisocyanurate foams have improved dimensional stability over a greater range of operating temperatures.
ELFOAMÔ T250, is designed primarily for use in environments where temperatures range from -100°F to +250°F (-73°C to +121°C) However, when foam insulation is exposed to temperatures exceeding 140°F (60°C) and/or relative humidity is in excess of 70%, allowances for foam expansion must be incorporated into the engineering design for non-laminated foams. ELFOAMÔ T250, like all cellular plastics, will degrade upon prolonged exposure to sunlight. Cover all foam material in order to block ultraviolet radiation and prevent degradation.
ELFOAMÔ T250 has been tested and found to meet the requirements for the specifications listed below. Additional testing, special production runs or registrations may be required before the product is accepted for the use in a specific application requiring one of these specifications.
HH- I-530A, Type I, Grade 2, Class 1
HH-1-530B, Type II
ASTM C591 (except R-value)
Density: 2.3 lb/ft3
k-factor (75°F mean temperature): 1.45 BTU - in/hr - ft2 - °F
R-value/inch (75°F mean temperature): 6 Hr - ft2 - °F/BTU
Compressive Strength (parallel): 37 psi
Compressive Modulus (parallel): 811 psi
Shear Strength (parallel): 25 psi
Shear Modulus (parallel): 257 psi
Tensile Strength (parallel): 45 psi
Flexural Strength (parallel): 37 psi
Flexural Modulus (parallel): 1047 psi