Epoxy NP643 - Sheet

Alternative and trade names
U.L. LISTED: N
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Description

NP643 is constructed from an electrical grade kraft paper and a high temperature specially modified epoxy resin system.

This material data has been provided by Norplex Micarta.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyTemperatureValueComment

Bonding strength

23.0 °C

408.2 Kg

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Density

23.0 °C

1.4 g/cm³

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Moisture absorption

23.0 °C

0.37 - 0.6 %

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Condition Dᵢ-24/23, Depending on the thickness

Mechanical

PropertyTemperatureValueComment

Compressive strength

23.0 °C

304.06 MPa

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Flatwise

Flexural strength

23.0 °C

190.98 MPa

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Flexural strength, transverse

23.0 °C

193.05 MPa

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Hardness, Rockwell M

23.0 °C

115 [-]

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Impact strength, Izod unnotched, ASTM

23.0 °C

34.7 J/m

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Impact strength, Izod unnotched, ASTM, Transversal

23.0 °C

29.89 J/m

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Tensile strength

23.0 °C

116.52 MPa

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Tensile strength, transverse

23.0 °C

95.84 MPa

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Thermal

PropertyValueComment

Glass transition temperature

130 - 145 °C

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DSC (Min.), DMA (Max.)

Relative temperature index, electrical

140 °C

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¹

Relative temperature index, mechanical strength

140 °C

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¹

Arc resistance

120 seconds

Flammability

UL 94, Class HB

Electrical

PropertyTemperatureValueComment

Breakdown voltage

23.0 °C

6 - 65 kV

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ASTM D149, Condition D48/50 (Min.) & A (Max.)

Comparative tracking index

23.0 °C

150 V

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Dielectric constant, 1MHz

23.0 °C

4.5 - 6.6 [-]

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ASTM D150, Condition D-24/23 (Min.) & A (Max.)

Dielectric strength

23.0 °C

6.69 kV/mm

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Dissipation factor, 1MHz

23.0 °C

0.05 - 0.06 [-]

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Condition A (Min.) & D-24/23 (Max.)

Technological properties

Property
Application areas

It is designed to be used in tap changers, coil support plates and terminal panels for transformers and their accessories.

Fillers

Paper

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.