2423835-1

## **KNITTED WIRE MESH** 

## **Knitted Wire Mesh** 

## Overview 

Kemtron Limited (Kemtron), now part of TE Connectivity, manufactures a range of knitted wire mesh products, providing a costeffective solution to high shielding performance applications in both the magnetic and electrical fields. 

These products are manufactured on a circular wire knitting machine using a single wire. The mono-filament interlocking-loop construction gives strength while allowing it to conform to almost any size or shape. The range of solid knitted wire mesh products are not suitable in applications that require regular opening and closing. If you require this feature please look at products with a sponge elastomer core. 

Solid knitted mesh products provide an excellent radio frequency interference (RFI)/electromagnetic interference (EMI) shield between two metallic surfaces. A range of wire types is available to allow for good galvanic compatibility thereby reducing or limiting the possibility of corrosion. 

## Kemtron’s knitted wire mesh 

## is available in 2 options 

- Solid Knitted Wire Mesh 

- Elastomer Cored Knitted Wire Mesh 

|**Summary**|**Solid Knitted**|**Elastomer Cored**<br>**Knitted Wire Mesh**|
|---|---|---|
|RFI/EMI shield|||
|EMP survivability|||
|Environmental seal|Dust only|Dust only|
|Frequent opening|||
|Continuous lengths|||
|Cut to length|||
|Fabricated gasket|||
|Mesh over<br>elastomer core|||



## Production Capabilities 

Kemtron has developed its knitted wire mesh production facility and expertise in this area to enable it to produce RFI/EMI gaskets in a wide range of materials and in many different size configurations. Together with our extensive fabrication capabilities and large stocks of raw materials, we can manufacture knitted wire mesh gaskets to suit many applications that support electromagnetic pulse (EMP) survivability. 

We offer a bespoke service, which can also produce economical gaskets, with good delivery times, in prototype quantities or for short, medium or large commercial production runs. 

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## **Solid Knitted Wire Mesh** 

## Product Overview 

The product consists of a knitted wire that is formed into an all wire profile forming a continuous gasket strip. 

## Application 

Solid knitted mesh gaskets provide an excellent RFI/EMI gasket shield between two metallic surfaces and with the choice of wire mesh material available allows for a good galvanic match with mating flanges, thereby limiting the possibility of corrosion between gasket and flange. 

- RFI/EMI applications 

- Panel seals in screened rooms 

- Areas with infrequent access 

- Cable Shielding (Wrapping with flat bandage) 

## Availability 

- In continuous lengths, cut to length in continuous lengths or cut to length 

- Variety of profiles and sizes available 

- Self adhesive backing is not recommended with this version of mesh 

## Design Considerations 

- Consideration should be given to the termination of cut mesh ends. Sometimes loose wires are evident after cutting. If you choose to cut the mesh yourself loose wires can be avoided by: 

- Dipping the end in glue 

- Spot welding the cut end 

- Sewing the cut end 

- Sufficient compression forces are required to achieve good contact. Contact seal between the metalwork 

- Galvanic compatibility can be achieved by choosing a suitable wire type 

- Water and moisture sealing is not possible with this product. However it does offer a limited dust seal 

- Solid knitted wire mesh suffers from compression set. So it is not recommended for frequent opening of panels. If you require this feature, refer to the knitted wire mesh over an elastomer core section 

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|Typical Shielding Performance||Flat Bandage||
|---|---|---|---|
|Note: This product is approx 0.5mm thick.<br>Profile<br>**H Field (Magnetic)**<br>10 kHz<br>100 kHz<br>1.0 MHz<br>10.0 MHz<br>Monel<br>28<br>45<br>64<br>>104<br>TCS<br>47<br>67<br>88<br>>104<br>S/St<br>35<br>43<br>50<br>**E Field (Electric)**<br>0.1 MHz<br>1.0 MHz<br>10.0 MHz<br>100 MHz<br>Monel<br>>118<br>>136<br>>123<br>99<br>TCS<br>>118<br>>136<br>>126<br>109<br>S/St<br>119<br>102<br>**P Field (Plain Wave)**<br>400 MHz<br>1.0 GHz<br>10.0 GHz<br>Monel<br>96<br>84<br>46<br>TCS<br>98<br>77<br>43<br>S/St<br>85<br>62<br>36<br>WIDTH<br>~~===~~<br>~~—~~<br>~~===> ae~~||||
|Materials||Material Codes Part Number||
|Monel Alloy 400 Wire (Mon)||**Mon**<br>**TCS**<br>~~————~~|~~————~~|



Material Codes Part Number **Mon TCS S/St Width 142 144 146** 12.7mm 2423849-1 2423852-1 2423855-1 25.4mm 2423850-1 2423853-1 2423856-1 50.8mm 2423851-1 2423854-1 2423857-1 ~~————~~ All products shown will be supplied in 25m length Other sizes are available on request 

Wire diameter 0.11mm UK Specification to BS3075 NA13 USA Specification to AMS 4730 

## Tin Plated Copper Clad Steel (TCS) 

Wire diameter 0.11mm UK Specification, BS4087*, BS EN 50117-10-1* USA Specification ASTM B277*, ASTM B452*, ASTM B520, ASTM B33*, AISI 1010 

* There is no complete specification for this material. Processes have been derived from parts of the above where applicable. 

## Stainless Steel (S/St) 

UK Specification BS EN 10088-3 2005 316 S19 Wire diameter 0.11mm 

## Tolerances 

- Width & Height ± 0.8mm 

- Diameter ± 0.8mm 

- Fin Dimensions ± 1.5mm 

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## Round 

## Rectangular 

## Profile 

## Profile 

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## Material Codes/Part Number 

## Material Codes/Part Number 

|**Diameter**|**Mon**|**TCS**|**S/St**|
|---|---|---|---|
||**112**|**114**|**116**|
|2.4mm|2423830-1|2423833-1|2423836-1|
|3.2mm|2423831-1|2423834-1|2423837-1|
|4.8mm|2423832-1|2423835-1|2423838-1|



Other sizes are available on request 

|**Height**|**Width**|**Mon**|**TCS**|**S/St**|
|---|---|---|---|---|
|||**132**|**134**|**136**|
|2.4mm|4.8mm|2423839-1|2423842-1|2423845-1|
|3.3mm|3.2mm|2423840-1|2423843-1|2423846-1|
|3.2mm|6.4mm|2423841-1|2423844-1|2423847-1|



Other sizes are available on request 

Profile 

Twin Round with Fin 

Material Codes/Part Number 

|DIA|~~—~~|~~W~~IDTH<br>|~~~~~~|**Diameter**<br>**Width**<br>**Mon**<br>**TCS**<br>**152**<br>**154**<br>3.2mm<br>25.4mm<br>2423858-1<br>2423861-1<br>4.8mm<br>25.4mm<br>2423859-1<br>2423862-1<br>6.4mm<br>25.4mm<br>2423860-1<br>2423863-1<br>~~—_~~|
|---|---|---|---|---|



Other sizes are available on request 

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## **Knitted Wire Mesh** 

## Product Overview 

This product is a knitted wire mesh over an elastomer core such as silicone cellular profile. Usually this consists of 2 layers of knitting over the elastomer core. The knitted mesh is then formed into the selected profile making a continuous gasket strip which is flexible and compressible and which makes an excellent RFI/EMI gasket. 

## Application 

In addition to making an excellent EMI/RFI shield between two metallic surfaces the choice of wire mesh material available also allows for a good galvanic match with mating flanges, thereby limiting the possibility of corrosion between gasket and flange. Further, the elastomer core of the gasket allows it to be compressed using low to medium force conforming to uneven surfaces and recovering well after use. 

- Groove gaskets such as O-rings 

- Due to its resiliency and low compression force, ideal for use in situations where repeated opening and closing operations are necessary 

## Availability 

- In continuous lengths 

- Cut to length 

- Variety of profiles and sizes 

- Selection of wire to meet galvanic compatibility requirements 

- A selection of elastomer cores are available to meet conditions such as temperature range, compression set, compression force 

- Self adhesive backing is not recommended with this type of product 

## Design Considerations 

- Consideration should be given to the termination of cut mesh ends. Sometimes loose wires are evident after cutting. If you choose to cut the mesh yourself loose wires can be avoided by: 

- Dipping the end in glue 

- Spot welding the cut end 

- Sewing the cut end 

- Compression forces required to allow good contact. Also the rigidity of the host metalwork 

- Galvanic compatibility can be achieved by choosing a suitable wire type 

- Water and moisture sealing is not possible with this product. However, it does offer a limited dust seal 

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Typical Shielding Performance Tolerances on Rubbers • Round and rectangular mesh sections ± 0.8mm **H Field (Magnetic)** • Up to 2.0mm diameter or thickness ± 0.5mm 10 kHz 100 kHz 1.0 MHz 10.0 MHz • 2.1mm to 10.0mm diameter or thickness ± 0.8mm Monel 28 45 64 >104 • Above 10.1mm diameter or thickness ± 1.5mm TCS 47 67 88 >104 Note: All sizes listed are that of the elastomer core. Allowances S/St 35 43 50 must be made for the wire mesh 1 layer approximately 0.4mm and 2 layers 0.8mm. All products will be supplied in a 25m length **E Field (Electric)** Round Silicone Sponge Core 0.1 MHz 1.0 MHz 10.0 MHz 100 MHz Monel >118 >136 >123 99 TCS >118 >136 >126 109 S/St 119 102 ~~=~~ we **P Field (Plain Wave)** 400 MHz 1.0 GHz 10.0 GHz Monel 96 84 46 TCS 98 77 43 S/St 85 62 36 ~~——~~ Materials Material Codes/Part Number Monel Alloy 400 Wire (Mon) **Mon TCS S/St** Wire diameter 0.11mm **Diameter** UK Specification to BS3075 NA13 **212 214 216** USA Specification to AMS 4730 2.4mm 2423864-1 2423868-1 2423872-1 Tin Plated Copper Clad Steel (TCS) 3.2mm 2423865-1 2423869-1 2423873-1 Wire diameter 0.11mm 4.8mm 2423866-1 2423870-1 2423874-1 UK Specification BS EN 50117-10-1*, BS4087*, 6.4mm 2423867-1 2423871-1 2423875-1 USA Specification ASTM B277*, ASTM B452*, ~~—~~ ASTM B520, ASTM B33*, AISI 1010 

* There is no complete specification for this material. Processes have been derived from parts of the above where applicable. 

Round Silicone Sponge Core 

## Stainless Steel (S/St) 

UK Specification BS EN 10088-3 2005 316 S19 Wire diameter 0.11mm 

## Sponge Silicone Rubber 

USA Specification AMS 3195 Temperature range -50°C to +200°C Service life >20 years 

## Material Codes/Part Number 

|**Height**|**Width**|**Mon**|**TCS**|**S/St**|
|---|---|---|---|---|
|||**232**|**234**|**236**|
|3.2mm|6.4mm|2423876-1|2423879-1|2423882-1|
|3.2mm|9.5mm|2423877-1|2423880-1|2423883-1|
|4.8mm|12.7mm|2423878-1|2423881-1|2423884-1|



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## **te.com** 

TE Connectivity, TE Connectivity (logo) and Kemtron Proven EMC Shielding (logo) are trademarks owned or licensed by TE Connectivity Ltd. family of companies. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. 

The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. 

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PERFORMANCE MATERIALS / KNITTED WIRE MESH