Epoxy RTB326H Tube: High-Performance, Low Moisture, and Superior Chemical Resistance

Being a heat treated version of RTB326, RTB326H is a tube made from a fine cotton fabric and an epoxy resin system. It has low moisture absorption and excellent dimensional stability and chemical resistance. RTB326 meets ASTM F3131 Type FB.

Properties

General

Property	Value	Testing Standard	Comment
Density	1.32 g/cm³	ASTM D792
Moisture absorption	0.7 %	ASTM D570	Condition D₁-24/23

Mechanical

Property	Value	Testing Standard	Comment
Compressive modulus	2.8 GPa	ASTM D695	Condition A
Compressive strength	206.8 MPa	ASTM D695	Condition A
Hardness, Rockwell M	105 [-]	ASTM D785
Tensile strength	82.7 MPa	ASTM D638	Condition A

Thermal

Property	Value	Comment
Glass transition temperature	150 °C	min. \| DMA
Relative temperature index, electrical	140 °C	¹
Relative temperature index, mechanical strength	140 °C	¹
Flammability	UL Bulletin 94, Class HB, Condition A

Electrical

Property	Value	Testing Standard	Comment
Breakdown voltage	30 kV	ASTM D149	Condition D48/50
	75 kV	ASTM D149	Condition A
Dielectric strength	11 kV/mm	ASTM D149	Condition D-48/50
	11.81 kV/mm	ASTM D149	Condition A

Technological properties

Property
Application areas	Typical uses include bearing retainers and parts that require excellent machining characteristics.
Fillers	Cotton Fabric
Other	1.This temperature is a recommendation only, and based upon experience in various applications. The maximum operating temperature is dependent upon the application and should be investigated prior to use 2.The mechanical properties are converted from American unit system to International unit system.
Supplier Disclaimer	This data, while believed to be accurate and based on reliable analytical methods, is for informational purposes only. The terms and conditions of the agreement under which it is sold will govern any sales of this product. Data supplied above are "typical values"; not to be considered "specification values". To assure the material's performance is adequate for a specific application; customers should verify, independent of Norplex-Micarta, performance characteristics of interest. It is the responsibility of the users of this information to make sure that they have the latest version of this TDB, and are urged to check with Customer Service or, preferably our web site, www.norplex-micarta.com, to determine if the information is the most current available.

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Composite material