Monex is an expanded Monel foil filled with silicone rubber. The exposed foil surface provides excellent conductivity combined with good corrosion resistance. Monex is also a ‘thin’ gasket medium, similar to Aluweave woven aluminium mesh, and is particularly suitable for connector or waveguide gaskets where a pressure seal and EMI shield is required. The material cannot be effectively joined so gaskets should be cut in one piece wherever possible. Thicknesses of 0.5mm and 0.75mm are available and it can be supplied in sheet form.
To retain the strength of the expanded Monel foil, we recommend that a minimum land-width of 3mm should remain at any point around the edge of a Monex gasket. We also suggest that gaskets with intricate outlines are die-cut at the factory.
Standard products
Expanded monel foil-Monex
Monex is an expanded Monel foil filled with silicone rubber. The exposed foil surface provides excellent conductivity combined with good corrosion resistance.
Applications
Like Aluweave, Monex expanded Monel foil is used for connector gaskets and other ‘thin’ gasket applications. Mating surfaces should ideally be within ± .01mm. Where hermetic sealing is not necessary, Monex – NF is available without the silicone filler.
Monex gaskets provide good ‘point contact’, while the rubber filler ensures excellent environmental sealing. Monex, like nearly all other conductive gasket materials, should not be fixed with a conductive or pressure sensitive adhesive and should be fixed as a friction fit utilizing the fixing screws to position the gasket before tightening.
Detailed information
Specifications
| Monel Foil | QQ-N-281B |
|---|---|
| Silicone Rubber | AMS 3220B |
Temperature range
| Silicone | +55 to +250oC |
|---|
Performance
| Frequency | Field | Attenuation |
|---|---|---|
| 10KHz | H | 45 |
| 100KHz | H | 68 |
| 1MHz | H | 88 |
| 1MHz | E | >100 |
| 10MHz | E | >100 |
| 100MHz | E | >100 |
| 400MHz | P | 100 |
| 1GHz | P | 84 |
| 10GHZ | P | 42 |
How to order
Specify: Shielding Series-Filler Code-Thickness-Size or drawing number
| Shielding Series | Filler Code | Thickness | Size |
|---|---|---|---|
| GX = Monex | SX = Silicone | 0005 = 0.5mm | xxxx-xxxx |
| 0007 = 0.75mm |
Examples/Notes
GX-SX-0005-Drawing No. specifies a cut gasket fabricated from 0.5 mm thick Monex Expanded Monel Foil.
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How to measure gaskets and o-rings
Gaskets can come in various shapes and sizes. We have put together a guide to help you measure some of the most common shaped gaskets correctly. Please follow the methods to help you successfully measure a gasket.
How to measure gaskets and o-rings