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FiberGraf Launches Nickel Coated GrafMat Powder for Thermal & Electrical Conductivity Usage

Published on 2014-06-25. Author : SpecialChem

FiberGraf Materials has announced a new line of nickel coated GrafMat powder. This unique material was developed at the request of its molding compound customer base. They asked to develop this product as a result of their satisfaction in utilizing base GrafMat powders for enhanced thermal and electrical conductivity applications.

The nickel coated graphite fiber GrafMat powder offers three key benefits:

  • High EMI/RFI shielding effectiveness at lower cost (in some cases a fraction of alternate materials)
  • Processes faster and with less energy than other shielding additives (lowering cost of production time)
  • Can be compounded to higher loading levels and replace multi-component formulas (65% weight additions have been compounded).

There are two new grades labeled: GrafMat A280N60 and GrafMat A90N60.

The A280N60 has a 280 micron average particle size while the A90N60 is about one third smaller at 90 microns. Either grade particles are individually coated with 60% weight addition nickel. The very thin nickel coating completely encapsulates each particle individually for a free flowing powder.

These nickel coated GrafMat graphite fiber powders are now available for molding compounders to incorporate into their engineered thermoplastic / thermoset resins as well as elastomeric grades.

A molding compounder has successfully run a 40% loaded very high density (< 2 grams/cc) TPE resin that showed excellent electrical conductivity while retaining the same conductivity after being twisted 180 degrees. Nickel coated GrafMat will replace a mixture of 4 other additives in this TPE resin application. In addition, GrafMat will allow the compounder to minimize waste by over 90% as compared with the current mixture since processing efficiency is dramatically increased and regrind is eliminated.

GrafMat nickel coated graphite fiber powder offers substantial cost savings over other nickel coated carbon and silver coated additives. In one example, nickel coated GrafMat is less that 50% of the cost of a short length nickel coated carbon fiber grade that is not completely encapsulated with nickel.

FiberGraf can tailor particle size distributions; as well, the amount of nickel can be varied. Other metal coatings such as aluminum, silver, silicon carbide, etc. can be considered as needs suggest.

Sample materials are available for use in discovering how this cost effective additive offers value for EMI/RFI shielding applications.

About FiberGraf Materials

FiberGraf Materials supports industrial applications with highly conductive, graphite particulate for composite enhancement. The unique graphite fiber offered under the name GrafMat has a distinctive 3D behavior. This material allows finished parts to be produced smaller, while capable of the same value of work, the typical linear behavior noticed with filled or enhanced materials is no longer an issue. By producing smaller parts, less material is required in the manufacturing process. The tooling will require less work and cycle times for production will be shortened. The result is overall cost savings.

Source: FiberGraf Materials

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