Nomex® Aramid Paper / Adhesive Tape
Nomex® from DuPont a synthetic, aromatic polyaramide polymer
Nomex® paper from DuPont (E-File number Nomex: E34739) is a synthetic, aromatic polyaramide polymer with excellent properties.
Manufactured in a complex paper process with two different types of fibers (flakes and fibrids), Nomex brings excellent chemical, mechanical and electrical resistance. Particularly in transformers, generators, motors and other electrical equipment, Nomex® (usually together with impregnating agents) enables very durable insulation with considerable power reserves. The material is flame retardant (UL 94 V0).
Nomex® paper from DuPont has the best possible property combination of thermal, chemical and electrical resistance. There are now other similar products on the market, but each has specific disadvantages.
For the adhesive coating of Nomex® adhesive tapes, we use only high-quality solvent-based industrial adhesives that can be used at temperatures up to 250°C. The adhesives are also suitable for use in the production process. This gives you an adhesive tape that perfectly complements the positive properties of Nomex® paper: easy application due to immediate bonding, dimensionally accurate dispensing, high performance of the adhesives with very good impregnant resistance. The impregnating agent absorption of Nomex is hardly negatively affected.
Whether single or double-sided adhesive, whether only 50 µm thick Nomex® 410 paper or up to 350 µm thick Nomex® 410: CMC supplies the right solution.
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Nomex® 410 - basic grade, heavily calendered for good electrical and mechanical properties (available from 0.05 mm to 0.350 mm)
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Nomex® 411 - non-calendered Nomex® 410 for better impregnant absorption, cushioning effect
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Nomex® 818 - mica-filled version for extremely improved corona resistance and dielectric strength (approx. 10 times the service life of Nomex 411)
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Nomex® E56A - relatively lightweight and therefore less costly alternative to Nomex® 410 for economical use
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Nomex® N196 - improved capillary action for faster and more reliable impregnation
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Nomex® 843S - a semiconducting variant for field forming in high voltage machines
CMC Klebetechnik supplies tapes, laminates, die-cuts and rolls from many of the versions listed above (some Nomex® versions are only available on request and with minimum quantities).
Advantages of Nomex:
- very good dielectric strength, even without impregnation
- has good mechanical strength in the compacted form
- allows continuous use up to 220°C without loss of positive properties (at least 10 years), thus higher power density and longer service life are realizable
- Nomex® has good corona resistance
- can be used in ultra-low temperature applications down to near 0°K
- Retains its dielectric strength even under high humidity conditions
- is very resistant to many solvents, acids and alkalis
- can be soaked and impregnated very well due to its paper structure
- is in many cases flame retardant according to UL94 and self-extinguishing (V0)
- is used as basic insulation in many insulation systems and is UL-listed (E34739)
- can be used down to -196°C
- can be used as high temperature resistant thermal insulation (Nomex 411: 0.12 W/mK)
- Nomex® can be used as a very lightweight, space-saving flame barrier in lithium-ion battery packs
- In an insulation environment (electrical insulation), Nomex® behaves very neutrally
- The material is non-toxic and does not contain halogens
- Nomex® dampens mechanical vibration and compensates for dimensional tolerances
- As a bundle tape, Nomex® is used in the cell production of lithium-ion battery packs
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CMC Type |
Breakdown voltage (Vrms) |
Features |
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| CMC 19708 Laminate Nomex / glass fabric Adhesive: acrylate Cover: silicone paper Total thickness: 0.280 mm |
3.000 |
Extremely robust, impregnatable Nomex glass fabric adhesive tape equipped with a good adhesive acrylate glue. Material is used e.g. for phase insulation. |
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| CMC 19714 Laminate Nomex / Polyester / Glass fabric Adhesive: acrylate Total thickness: 0.370 mm |
> 9.000 | Extremely robust laminate made of Nomex® 410, a 50μm polyester film and glass fabric. Very stress-resistant due to the polyester film, extremely mechanically resilient. Use: e.g. for traction engine construction. |
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| CMC 65120/ 65220 Nomex adhesive tape Adhesive: Acrylic With or without crepe cover Film thickness: 0,050 mm Total thickness: 0.110 mm |
800 |
Single-sided adhesive, impregnation- and solvent-resistant high-performance paper suitable for high continuous service temperatures for use as long-term stable insulation in transformer construction and for rotating machinery. The product is equipped with a very cohesive, chemically highly resistant, weather-resistant acrylic adhesive, which is also very well suited for long-term applications under maximum temperature load. The product further possesses properties such as consistently high dielectric properties under heat, moisture and chemical stress, slightly cushioning effect due to paper-like structure, can be used up to over 250°C. |
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| CMC 65121/ 65221 Nomex adhesive tape Adhesive: acrylate With or without crepe cover Film thickness: 0.080 mm Total thickness: 0.130 mm |
1.700 |
see CMC 65120 / 65220 |
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| CMC 65122/ 65222 Nomex adhesive tape Adhesive: acrylate With or without crepe cover Film thickness: 0,130 mm Total thickness: 0.185 mm |
3.300 |
see CMC 65120 / 65220 |
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| CMC 65123/ 65223 Nomex adhesive tape Adhesive: Acrylic With or without crepe cover Film thickness: 0,180 mm Total thickness: 0.235 mm |
≥ 5.000 |
see CMC 65120 / 65220 |
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| CMC 65838 Laminate Nomex / Polyester Adhesive: rubber Film thickness: 0.090 mm Total thickness: 0.135 mm |
≥ 5.000 | Flexible laminate of Nomex and polyester, good impregnability and high dielectric strength, as insulation in electric motor and generator construction. |
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| CMC 65842 Nomex adhesive tape Adhesive: acrylate Film thickness: 0.050 mm Total thickness: 0.115 mm |
≥ 800 | High-performance, impregnation- and solvent-resistant paper suitable for high continuous operating temperatures for use as long-term stable insulation in transformer construction and for rotating machines. Good impregnability, good partial discharge resistance, very good adhesive strength. |
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