Precision Shielding, Advanced Conductivity
EMITEC™
Conductive Nonwovens
Lightweight, tuneable shielding solutions
Our EMITEC™ conductive nonwovens provide a lightweight, flexible solution for imparting tuneable EMI shielding and electrical conductivity to composite structures.
EMITEC™ materials are easy to handle and seamless to integrate, forming part of the composite structure without requiring additional process steps unlike conventional EMI shielding options. Their lightweight, highly uniform structure also ensures consistent electrical conductivity and shielding with a minimal weight addition, reducing final part weight.
In addition, our veils can be customised to meet specific customer or market needs, ensuring an optimum performance benefit as well as process and resin compatibility.
Fibre Type
Copper and Nickel Coated Carbon, Nickel Coated Carbon, Copper Coated Carbon, Silver Coated Nylon, Carbon
Properties
Electrical conductivity, EMI shielding, thermal conductivity and static dissipation
Areal Weights
4 - 200 g/m²
Shielding Effectiveness
Up to 78 dB
Surface Resistance Range
Carbon: 2 - 25 ohm/sq, Nickel Coated Carbon: 0.5 - 2.0 ohm/sq, Copper and Nickel Coated Carbon: 0.2 - 1.0 ohm/sq and Copper Coated Carbon: 0.15 - 0.45 ohm/sq
Results
Integral shielding for composites
Using EMITEC™
EMITEC™ conductive nonwovens are incorporated into the surface of a composite structure, providing a high level of shielding to electromagnetic interference ranging from 30MHz up to and beyond 40GHz. The level of shielding can be tuned to meet application requirements by selecting the fibre type, metal coating and areal weight used.
Results
Shielding Effectiveness of Conductive Nonwovens
Testing of copper and nickel coated carbon, nickel coated carbon, copper coated carbon and carbon nonwovens was completed to ASTM D4935 Standard.
Properties
Electrical Conductivity
Using EMITEC™
EMITEC™ is used to impart electrical conductivity to composite parts or component housing. Veils can be used as supplied or readily incorporated into a composite structure to provide a conductive surfacing layer for applications such as resistive heating or electrostatic dissipation.
Applications
Resistive Heating
Our nonwovens have a long track record in enabling resistive or joule heating technologies. The range of conductive nonwovens we offer, coupled with the capability to precisely adapt the electrical properties to deliver a specific level of electrical resistance, make them an ideal candidate for heating applications.
Resistive heating nonwovens work when an electrical current is passed across the structure, when this occurs energy is released in the form of heat. The heat generated is then utilised effectively in a range of different applications including heating panels and de-icing of bridge structures and other components.
Resistive heating nonwovens work when an electrical current is passed across the structure, when this occurs energy is released in the form of heat. The heat generated is then utilised effectively in a range of different applications including heating panels and de-icing of bridge structures and other components.
Lightweight
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Minimum weight addition to reduce component weight
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From 4 g/m²
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High level of EMI shielding relative to weight
Flexible
- Flex fatigue resistance
- Conformable to complex shapes
Tuneable
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Shielding effectiveness can be tailored to meet application requirements
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In-house coating process
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Uniform fibre distribution for consistent performance
Processing Ease
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Easy to handle
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Compatible with all common composite resins and manufacturing processes
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Integrated into composite without any additional steps
Typical Applications
Portable Electronics
Providing a barrier to EMI in portable electronics to ensure effective operation, our materials can be incorporated as conductive tapes and also deliver the electrical conductivity necessary for connectors.
Battery Boxes
Metal coated nonwovens are incorporated into electronics enclosures to shield against electromagnetic interference (EMI) and facilitate the move from metal to composite enclosures.
Avionics
Our metal coated nonwovens are used to shield flight avionics from electromagnetic interference which could compromise aircraft operation and safety.
Mould Heating
Our nonwovens have a long track record in enabling resistive or joule heating technologies. In wind turbine blade manufacture this technology is used in mould heating in order to cure the composite blade structure; conductive nonwovens are incorporated into the mould and heat up when a current is passed through them in order to cure the part.
Bridges, panels and flooring
Our nonwovens have a long track record in enabling resistive or joule heating technologies, as the electrical resistance of the veil can be adapted to meet the technology requirements. Resistive heating nonwovens work when an electrical current is passed across the structure; when this occurs energy is released in the form of heat. The heat generated is then utilised effectively in a range of different applications including heating panels and de-icing of bridge structures and other components.
Scanners
Our conductive nonwovens are used to reduce EMI in medical equipment such as scanners, where interference could compromise operation.
Markets
We offer an extensive range of technical nonwovens, already qualified in aero composites and AS9100 certified, that can improve the appearance, function and ease of fabrication of AAM composites and solve a range of technical challenges faced in eVTOL aircraft and drone design. All our materials are designed specifically for use in composites, ensuring compatibility with all common resins and manufacturing techniques as well as ease of integration & use.
James Cropper Advanced Materials customers are among the largest aerospace manufacturers in the world, including many Fortune 100 and 500 companies. Our portfolio of products are in use on most commercial aircraft, delivering surface finish solutions, improved processing, light weighting efficiency solutions, and more.
A multitude of solutions for automotive composites, ranging from Class A surface finish to friction material substrates and composite EV battery enclosures.
James Cropper has supplied materials into the Defence sector for over 25 years. Our success lies in our ability to develop materials which meet specifications that other providers can't fulfil. This means that we work closely with our customers to design a product to suit specific application requirements.
Our advanced materials are found in a number of medical applications, from wearables and adhesives to scanning machinery.
Our nonwovens deliver specific functionality to leading renewable energy companies composite wind turbines, including surface finish and fire protection inside nacelles.
Combining properties to improve composite fabrication with functionality such as EMI shielding and conductivity, our nonwovens provide multi-functional solutions for electronic applications.