SynTherm® – Insulating Materials Nomex® 411
Nomex® 411 is a synthetic electrical insulating paper constructed of a non-calendered, aromatic polyamide-fibrid flock composition.
Nomex® 411 is a Class H (180 °C) insulating material. Temperatures up to 200 °C have only a slight effect on its electrical properties. The good mechanical properties can be extrapolated at much higher temperatures. Due to the polymer structure, Nomex® 411 can also be used an temperatures as low as -190 °C with good effect. It has a high short-time electric strength. The permanent field strength, however, should not be greater than 1.2 kv/mm. Nomex® 411 is compatible with all classes of standard resins, varnishes, adhesives and transfomer fluids, lubricating oils and coolants. Common solvents can result in easily reversible expansion. Nomex® 411 paper is of low flammability (UL 94V-0); in addition, it has a very high resistance to beta and gamma radiation.
Application
High-quality Nomex® 411 is used in practically all known applications for electrical sheet insulating materials. Applications range from AC and DC motors to large generators, wet and dry transformers and chokes, even with beta and gamma radiation exposure.
Standards
- Class H (180 °C), insulating material
- UL listed (Class 220), file no. E 34739
Delivery forms
Film thickness in µm:
130, 180, 250, 380, 580
Nomex® 411 can be supplied:
- in bands: on request, depending on material thickness
- in rolls: 457 mm or 914 mm
Wrap:
- depth approx. 1 - 12 mm, distance approx. 1 -10 mm
- from widths of 10 mm to 240 mm and thickness of 0.25 mm
Base
Uncalendered, aromatic polyamide-fibrid-flock composition.
Punched parts, bent and formed parts
We offer a wide range of punched and formed parts: Rolls, individual parts unsorted, sorted or stacked, adhesive on one or both sides, non-adhesive, with or without a grip tab.
More about punched parts
Technical data
| Property | Unit of measure | Test method | |||||
|---|---|---|---|---|---|---|---|
| Nominal thickness | µm | 130 | 180 | 250 | 380 | 580 | |
| Typical thickness | µm | 140 | 200 | 260 | 430 | 660 | TAPPI-411 |
| Specific weight | g/m² | 42 | 64 | 82 | 134 | 205 | ASTM D-646 |
| Density | g/cm³ | 0.30 | 0.31 | 0.31 | 0.31 | 0.31 | |
| Tensile strength longitudinal | N/cm | 18 | 27 | 35 | 55 | 71 | ASTM D-828 |
| Tensile strength transversal | N/cm | 9 | 14 | 20 | 33 | 47 | ASTM D-828 |
| Elongation at break longitudinal | % | 3.6 | 3.8 | 3.4 | 3.7 | 3.2 | ASTM D-828 |
| Elongation at break transversal | % | 4.8 | 5.6 | 5.2 | 5.3 | 3.9 | ASTM D-828 |
| Elmendorf tear strength longitudinal | N | 1.1 | 1.6 | 1.9 | 4.1 | 7.4 | TAPPI-414 |
| Elmendorf tear strength transversal | N | 1.5 | 2.5 | 2.5 | 5.8 | 9.4 | TAPPI-414 |
| Property | Unit of measure | Test method | |||||
|---|---|---|---|---|---|---|---|
| Nominal thickness | μm | 130 | 180 | 250 | 380 | 580 | |
| Field intensity | kV/mm | 9 | 9 | 9 | 9 | 9 | ASTM D-149 |
| Dielectric constant at 60 Hz | 1.2 | 1.2 | 1.2 | 1.3 | 1.3 | ASTM D-150 | |
| Loss factor at 60 Hz(x10^-3) | 3 | 3 | 3 | 3 | 3 | ASTM D-150 |