High-Performance Epoxy Sheet NP643 – Superior Strength & Thermal Resistance
NP643 is constructed from an electrical grade kraft paper and a high temperature specially modified epoxy resin system.
Properties
General
| Property | Value | Comment |
|---|---|---|
Bonding strength | 408.2 Kg | |
Density | 1.4 g/cm³ | |
Moisture absorption | 0.37 - 0.6 % | Condition D₁-24/23 | Depending on the thickness of the specimen |
Mechanical
| Property | Value | Comment |
|---|---|---|
Compressive strength | 304.1 MPa | Flatwise |
Flexural strength | 191.0 MPa | |
193.1 MPa | Transverse | |
Hardness, Rockwell M | 115 [-] | |
Impact strength, Izod unnotched, ASTM | 29.9 J/m | Transverse |
34.7 J/m | ||
Tensile strength | 116.5 MPa |
Thermal
| Property | Value | Comment | |
|---|---|---|---|
Glass transition temperature | 130 °C | min. | DSC | |
145 °C | max. | DMA | ||
Relative temperature index, electrical | 140 °C | ¹ | |
Relative temperature index, mechanical strength | 140 °C | ¹ | |
Arc resistance | 120 seconds | ||
Flammability | UL 94, Class HB | ||
Electrical
| Property | Value | Testing Standard | Frequency | Comment |
|---|---|---|---|---|
Breakdown voltage | 6 kV | ASTM D149 | Condition D48/50 | |
65 kV | ASTM D149 | Condition A | ||
Comparative tracking index | 150 V | |||
Dielectric constant | 4.5 [-] | ASTM D150 | 1MHz | Condition D-24/23 |
6.6 [-] | ASTM D150 | 1MHz | Condition A | |
Dielectric strength | 6.69 kV/mm | |||
Dissipation factor | 0.054 [-] | 1MHz | Condition A | |
0.057 [-] | 1MHz | Condition D-24/23 |
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. | |
Composite material
- NP515LS Phenolic Sheet – High‑Temperature Glass Fabric for Reliable Insulation
- Epoxy NP193E Sheet – High-Performance Aramid/Glass Fiber Composite
- MC507U Silicone Sheet – High‑Strength, Utility‑Grade Material for Industrial Applications
- NP572 Epoxy Sheet – High‑Strength, Temperature‑Resistant Glass Laminate for Class H Insulation
- MC511A Epoxy Sheet – High-Strength, Temperature-Resistant for Power Generation
- NP130 Epoxy Sheet – Flame‑Retardant Woven Glass Composite, PCB & MIL Certified
- High-Performance Epoxy Sheet NP511 – Superior Strength & Temperature Resistance
- High-Performance Epoxy NP511EM Sheet – Superior Strength & Thermal Resistance
- MC511FR High‑Strength Glass Epoxy Sheet – Superior Flexural Performance
- MC511AF High-Strength Glass Epoxy Sheet – Superior Flexural Performance