Rohacell® 31 Polymethacrylimide (PMI) Rigid Foam Sheet

ROHACELL 31 is the lowest density grade and a very high strength:weight ratio.

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Chemical nature: ROHACELL is manufactured by hot forming of methacrylic acid/methacrylonitrile copolymer sheets. During foaming this copolymer is converted to polymethacrylimide.Information supplied by Emkay Plastics, Ltd.
Advantages: closed-cell rigid expanded plastic material for light weight sandwich construction excellent mechanical properties high dimensional stability under heat solvent resistance particularly at low temperature, a low thermal conductivity highest strength and moduli values highest for any foamed plastic in its density range

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Specifications

PropertyValueUnit

Mechanical Properties

shear strength0.393ASTM C273-61MPa

shear modulus12.8ASTM C273-61MPa

Flexural strength0.786ASTM D790-66; at YieldMPa

Tensile strength0.979ASTM D638-68;UltimateMPa

Compressive Strength0.393ASTM D1621-64; at YieldMPa

Elongation at break-MD3.5ASTM D638-68%

Tensile modulus-MD35.3ASTM D638-68MPa

Thermal Properties

Thermal Expansion37ASTM D696-70@Temperature 20.0 °C; Linearum/(m-°C)

Maximum Service Temperature180Dimensional stability per DIN 53424; Air°C

Thermal Conductivity0.031ASTM C177-63W/(m K)

Thermal Expansion25Temperature -100 °C; Linear@um/(m-°C)

Electrical Properties

Dielectric Constant1.05Frequency 1e+10 Hz@

Dissipation Factor0.0001Frequency 2.00e+9 Hz@

Surface Resistance20,000,000,000,000ohm

Dielectric Constant1.05Frequency 5.00e+9 Hz@

Dissipation Factor0.0004Frequency 5.00e+9 Hz@

Dissipation Factor0.0034Frequency 2.60e+10 Hz@

Dielectric Constant1.06Frequency 2.60e+10 Hz@

Chemical Properties

Oxirane Oxygen Content19 – 20%

Water absorption1350days immersion at 20°C; at Saturation%

Appearance Properties

AppearanceWhite

Physical Properties

Moisture Expansion<1.050days immersion at 20°C%

Moisture absorption6at Equilibrium; 65% RH%

Density0.032ASTM D1622-63g/mL

Moisture absorption2.9at Equilibrium; 30% RH%

Moisture absorption19.5at Equilibrium;98% RH%

Moisture absorption4.7at Equilibrium; 50% RH%

Moisture absorption1.5at Equilibrium;15% RH%

Additional Information

Chemical nature

ROHACELL is manufactured by hot forming of methacrylic acid/methacrylonitrile copolymer sheets. During foaming this copolymer is converted to polymethacrylimide.Information supplied by Emkay Plastics, Ltd.

Advantages

closed-cell rigid expanded plastic material for light weight sandwich construction excellent mechanical properties high dimensional stability under heat solvent resistance particularly at low temperature, a low thermal conductivity highest strength and moduli values highest for any foamed plastic in its density range

Specifications

PropertyValueUnit

Mechanical Properties

shear strength0.393ASTM C273-61MPa

shear modulus12.8ASTM C273-61MPa

Flexural strength0.786ASTM D790-66; at YieldMPa

Tensile strength0.979ASTM D638-68;UltimateMPa

Compressive Strength0.393ASTM D1621-64; at YieldMPa

Elongation at break-MD3.5ASTM D638-68%

Tensile modulus-MD35.3ASTM D638-68MPa

Thermal Properties

Thermal Expansion37ASTM D696-70@Temperature 20.0 °C; Linearum/(m-°C)

Maximum Service Temperature180Dimensional stability per DIN 53424; Air°C

Thermal Conductivity0.031ASTM C177-63W/(m K)

Thermal Expansion25Temperature -100 °C; Linear@um/(m-°C)

Electrical Properties

Dielectric Constant1.05Frequency 1e+10 Hz@

Dissipation Factor0.0001Frequency 2.00e+9 Hz@

Surface Resistance20,000,000,000,000ohm

Dielectric Constant1.05Frequency 5.00e+9 Hz@

Dissipation Factor0.0004Frequency 5.00e+9 Hz@

Dissipation Factor0.0034Frequency 2.60e+10 Hz@

Dielectric Constant1.06Frequency 2.60e+10 Hz@

Chemical Properties

Oxirane Oxygen Content19 – 20%

Water absorption1350days immersion at 20°C; at Saturation%

Appearance Properties

AppearanceWhite

Physical Properties

Moisture Expansion<1.050days immersion at 20°C%

Moisture absorption6at Equilibrium; 65% RH%

Density0.032ASTM D1622-63g/mL

Moisture absorption2.9at Equilibrium; 30% RH%

Moisture absorption19.5at Equilibrium;98% RH%

Moisture absorption4.7at Equilibrium; 50% RH%

Moisture absorption1.5at Equilibrium;15% RH%

Rohacell® 31 Polymethacrylimide (PMI) Rigid Foam Sheet

Additional Information

Reviews

Specifications

Rohacell® 31 Polymethacrylimide (PMI) Rigid Foam Sheet

Additional Information

Reviews

Submit review

Specifications

Mechanical Properties

Thermal Properties

Electrical Properties

Chemical Properties

Appearance Properties

Physical Properties

Additional Information

Reviews

Specifications

Additional Information

Reviews

Submit review

Specifications

Mechanical Properties

Thermal Properties

Electrical Properties

Chemical Properties

Appearance Properties

Physical Properties