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Series of rigid Polymethacrylimide...

Cuming Microwave Low Loss Dielectric Stock Materials - 210 Series

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Cuming Microwave C-STOCK RH Low Dielectric Constant, Low Loss Structural Foam

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Series of rigid Polymethacrylimide foams
Which will withstand temperatures to 380ºF
High compression
Shear strength
Very low dielectric constant
Low loss factor

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Cuming Microwave C-STOCK RH Low Dielectric Constant, Low Loss Structural Foam
Series of rigid Polymethacrylimide foams
Which will withstand temperatures to 380ºF
High compression
Shear strength
Very low dielectric constant
Low loss factor
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Test Equipment Description

The C-STOCK RH is a series of rigid Polymethacrylimide foams which will withstand temperatures to 380ºF. C-STOCK RH has a high compression and shear strength and a very low dielectric constant and low loss factor. It is easily machined to close tolerances.

C-STOCK RH is useful as a low density, high temperature structural member, as a thermal barrier material, and as an RF window material.

C-STOCK RH may be thermo-formed at temperatures of 325ºF to 360ºF, and therefore finds significant uses as radome core material.

TYPICAL PROPERTIES
Grade	RH-5	RH-7	RH-10
Density lbs/ft³ (D1622)	3	4.5	7
Dielectric constant (2-20 GHz)	1.09	1.11	1.14
Dissipation factor (5 GHz)	.0004	.0007	.0009
Compressive strength, psi (D1621)	128	213	427
Shear strength, psi (C273)	114	185	341
Thermal conductivity, Btu-in/ft²-hr. -ºF	0.16	0.22	0.30
Standard sheet size	24 x 24 in.	24 x 24 in.	21 x 21 in.
Thicknesses available	0.5, 1.0, 2.0 in	0.5, 1.0, 2.0 in	1.9 in.