MODX Revolution

Oriented Wires in Silicone | Strips & Die-cut Gaskets EMI Shielding

General Information

Our range of oriented wire in silicone rubbers combine excellent environmental protection with a high level of shielding effectiveness. These products incorporate a matrix of vertically oriented wires which pierce both flat faces of the elastomer and provide around 100 contact points per square centimetre.

The materials, which include solid silicone and sponge silicone variants as well as Fluorosilicone, sponge silicone flame retardant, solid silicone flame retardant and solid silicone with either a fluorsosilicone edge or wire free edge options, are produced in sheet or strip form and are usually factory fabricated and diecut into gasket profiles to customers specifications.

Wire-free widths can be ordered where the material cross-section has wires along just one edge, or along both edges with no wires in the centre. This provides a pressure seal and emi shield in one component but reduces the compressive force needed to fit the gasket.

Dual material variants can also provide the advantages of a fluorosilicone gasket with the cost-effectiveness of plain silicone.  This is achieved by bonding a wire-free fluorosilicone edge to a standard sheet or strip during the moulding process.  Fabrcated gaskets have a wire-free, contaminant resistant outer edge suitable for applications where loose wires could cause problems when gaskets are subjected to solvents or hydrocarbons and are liable to soften & swell.

Please contact us to discuss your precise requirements.

Applications

Oriented wires in silicone is probably the most versatile of emi shielding gasket materials. All variants provide good environmental protection and are regularly used where long service life, high performance fixed gaskets are needed. Because of the harder nature of the material, and because it needs a strong closing force through a relatively rigid cover which is screw fixed at regular intervals, they are not generally suitable for doorseals or other applications where a regular opening and closing application applies. The possible exception to this is the sponge silicone variant.

Oriented wires in silicone material is usually supplied in gasket, strip or sheet form with a pressure sensitive adhesive backing which holds the gasket in the absence of a groove or channel. If a groove is available the gasket form is often a jointed 'o' ring without the adhesive backing.

Because oriented wire elastomers are wider than they are high, when specifiying the thickness should be stated first as this will be the length of the embedded wires. Then, if the height needs to be greater than the width (i.e. to fit into a groove), there will be no doubt about your actual needs.

Particular care needs to be taken over the design of gaskets to ensure that fixing covers or doors do not distort during compression. It is often necessary to incorporate 'limit stops' into the gaskets to prevent over-compression. The material should be compressed by approximately 15% of its relaxed height. Please contact us for technical advice.

Oriented Wires in Silicone | Strips & Die-cut Gaskets EMI Shielding

SPECIFICATIONS

Solid Silicone rubber ZZ-R-765 2b 40   
Sponge Silicone rubber AMS 3195  
Fluorosilicone rubber Mil-R-25988 Gr 50  
Monel wire BS3075 – NA13 (0.11mm diameter)
Aluminium 5056 AMS 4182 (0.13mm diameter)
Phosphor Bronze Cu Sn 6% (0.114mm diameter)

Temperature range

- 55 to + 250°C

PERFORMANCE

FrequencyFieldType SP
10 KHz H 55
100 KHz H 83
1 MHz H >100
1 MHz E >120
10 MHz E >120
100 MHz E >120
400 MHz E >100
1 GHz P 95
10 GHz P 85

Tolerances

  • Thickness up to 1.0mm +0.25mm –0.15mm
  • Thickness over 1.0mm ± 0.25mm
  • Width tolerance on sheet material ±1.0mm

How to order

Please specify Shielding Series - Wire Type - Thickness - Width - Adhesive Option

Shielding SeriesWire CodeThickness/WidthFinish
SP=Solid Silicone M=Monel xxxx-xxxx S/A= Self-adhesive
SS=Sponge Silicone A=Aluminium   N/A=No adhesive
SR=Flame Retardant Solid Silicone P=Phosphor Bronze    
SG=Flame Retardant Sponge Silicone      
SF= Solid Fluorosilicone      
SE=Wire Free Edge / Fluorosilicone Edge      

Examples / Notes

Note:
Standard material length is 900mm
Examples:
SP-M-0016-0127-S/A is Solid Silicone with Monel wire 1.6 mm thick x 12.7 mm wide with self-adhesive.
SS-A-0032-1140-N/A is Sponge Silicone with Aluminium wire 3.2 mm thick x 114 mm wide no adhesive.

For strip material not shown, or specific shapes, made up gaskets and for fixing hole positions, please send a drawing and we will allocate a part number with our quotation.

Example Sizes:

Thickness mmWidth mm

Part Number Suffix

Thickness mmWidth mmPart Number Suffix
0.8 76 -0008-0760 1.6 3.2 -0016-0032
0.8 114 -0008-1140 1.6 4.8 -0016-0048
0.8 152 -0008-1520 1.6 6.4 -0016-0064
0.8 228 -0008-2280 1.6 9.5 -0016-0095
1.1 76 -0011-0760 1.6 12.7 -0016-0127
1.1 114 -0011-1140 1.6 15.9 -0016-0159
1.1 152 -0011-1520 2.4 3.2 -0024-0032
1.1 228 -0011-2280 2.4 4.8 -0024-0048
1.3 76 -0013-0760 2.4 6.4 -0024-0064
1.3 114 -0013-1140 2.4 9.5 -0024-0095
1.3 152 -0013-1520 2.4 12.7 -0024-0127
1.3 228 -0013-2280 2.4 15.9 -0024-0159
1.6 76 -0016-0760 3.2 3.2 -0032-0032
1.6 114 -0016-1140 3.2 4.8 -0032-0048
1.6 152 -0016-1520 3.2 6.4 -0032-0064
1.6 228 -0016-2280 3.2 9.5 -0032-0095
2.4 76 -0024-0760 3.2 12.7 -0032-0127
2.4 114 -0024-1140 3.2 15.9 -0032-0159
2.4 152 -0024-1520 4.8 4.8 -0048-0048
2.4 228 -0024-2280 4.8 6.4 -0048-0064
3.2 76 -0032-0760 4.8 9.5 -0048-0095
3.2 114 -0032-1140 4.8 12.7 -0048-0127
3.2 152 -0032-1520 4.8 15.9 -0048-0159
3.2 228 -0032-2280 6.4 6.4 -0064-0064
4.8 76 -0048-0760 6.4 9.5 -0064-0095
4.8 114 -0048-1140 6.4 12.7 -0064-0127
4.8 152 -0048-1520 6.4 15.9 -0064-0159
4.8 228 -0048-2280 6.4 19.1 -0064-0191
6.4 76 -0064-0760 6.4 25.4 -0064-0254
6.4 114 -0064-1140 8.0 8.0 -0080-0080
6.4 152 -0064-1520 8.0 9.5 -0080-0095
6.4 228 -0064-2280 8.0 12.7 -0080-0127
8.0 76 -0080-0760 8.0 15.9 -0080-0159
8.0 114 -0080-1140 8.0 19.1 -0080-0191
8.0 152 -0080-1520 8.0 25.4 -0080-0254
8.0 228 -0080-2280 12.7 12.7 -0127-0127
9.5 76 -0095-0760 12.7 15.9 -0127-0159
9.5 114 -0095-1140 12.7 19.1 -0127-0191
9.5 152 -0095-1520 12.7 25.4 -0127-0254
9.5 228 -0065-2280 15.9 15.9 -0159-0159

Please note:

  • Strip material is available in 915mm nominal lengths and can be factory bonded into longer sections.
  • Sheet material is generally 152mm or 228mm nominal widths.
  • Minimum thickness 0.8mm depending on material variant - please check before ordering.
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