Phenolic NP342LS Sheet: High-Temperature, Low-Shrink, Moisture-Resistant Material for Class B Generators

Fine weave canvas phenolic engineered for dimensional stability and mechanical strength at temperatures as high as 125oC. Providing excellent moisture resistance and easy to machine, NP342LS low- shrink material was designed for use in Class B generators for wedge applications and can be tested to the General Electric specification A50A341.

Properties

General

Property	Value	Testing Standard	Comment
Density	1.37 g/cm³	ASTM D792
Moisture absorption	0.58 %	ASTM D570	Condition D₁-24/23

Mechanical

Property	Value	Testing Standard	Comment
Compressive strength	282.7 MPa	ASTM D695	Condition A \| Flatwise
Elastic modulus	9.7 GPa	ASTM D638	Condition A
	10.5 GPa	ASTM D638	Condition A, Transverse
Flexural strength	144.1 MPa	ASTM D790	Condition A
	146.2 MPa	ASTM D790	Condition A, Transverse
Hardness, Rockwell M	95 [-]	ASTM D785
Impact strength, Izod unnotched, ASTM	133 J/m	ASTM D256	Condition E-48/50
	155 J/m	ASTM D256	Condition E-48/50, Transverse
Shear strength	148.2 MPa	ASTM D732	Condition A, Transverse
Tensile strength	91 MPa	ASTM D638	Condition A

Thermal

Property	Value	Comment
Relative temperature index, electrical	125 °C	UL Bulletin 746b¹
Relative temperature index, mechanical strength	125 °C	UL Bulletin 746b¹
Flammability	UL Bulletin 94, Class HB, Condition A

Electrical

Property	Value	Testing Standard	Frequency	Comment
Breakdown voltage	64 kV	ASTM D149		Condition A
Dielectric constant	5.17 [-]	ASTM D150	1MHz	Condition A
	5.35 [-]	ASTM D150	1MHz	Condition D-24/23
Dissipation factor	0.066 [-]	ASTM D150	1MHz	Condition A
	0.072 [-]	ASTM D150	1MHz	Condition D-24/23

Technological properties

Property
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.
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.

Property

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.

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