RTP 300 Series Compounds

This data provides comparative information on the shielding performance of standard RTP Company polycarbonate compounds using various combinations of additives and loading levels.

Instead of off-the-shelf solutions, RTP Company routinely develops specialty compounds with a precise combination of properties such as conductivity, flame retardance, structural reinforcement, color, and wear resistance to meet your exact application requirements.

Product Description
ESD 381 Carbon Fiber 10%
ESD 383 Carbon Fiber 20%
ESD 385 Carbon Fiber 30%
EMI 360.5 Stainless Steel Fiber 5%
EMI 361 Stainless Steel Fiber 10%
EMI 362 Stainless Steel Fiber 15%

RTP 300 Series
Polycarbonate Compounds

  • Creep resistance
  • Toughness
  • Dimensional stability
  • Chemical resistance
  • Fatigue endurance

Polycarbonate possesses excellent impact strength, high heat resistance and good dimensional stability. It was one of the first thermoplastics to offer these properties. Polycarbonate is resistant to water and to mineral and organic acids. It is not suitable for contact with aromatic and chlorinated hydrocarbons or strong alkaline substances.

RTP Company’s EMI 330 FR Series polycarbonate compounds incorporate stainless steel fiber, glass fiber, and/or flame retardant additives. These compounds are UL recognized with a rating of V-0 @ 1/16 inch (1.6 mm).

Carbon Fiber Products

  • Reinforcing
  • Highest strength/modulus properties of the common shielding additives
  • Lowest cost of the common shielding additives
  • Low shielding performance

ESD 381

Carbon Fiber 10%

ESD 383

Carbon Fiber 20%

ESD 385

Carbon Fiber 30%

Stainless Steel Fiber Products

  • Non-reinforcing
  • Minimal effect on neat resin properties
  • Similar mold shrinkage to neat resin
  • Good shielding-to-cost performance
  • Best colorability of the common shielding additives

EMI 360.5

Stainless Steel 5%

EMI 360.5

EMI 361

Stainless Steel 10%


EMI 362

Stainless Steel 15%


ASTM D4935: Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials

This test method provides a procedure for measuring the electromagnetic (EM) shielding effectiveness (SE) of a material due to a plane-wave, far-field EM wave. The test utilizes a coaxial transmission line to determine the shielding effectiveness of a given material. The test method is valid for a frequency range of 30 MHz to 1.5 GHz. Various thicknesses and types of materials can be tested to acquire a relative ranking of shielding effectiveness.

Supporting Product Information

Chemical Resistance
Information on resin resistance to chemical and environmental exposure.

RTP Company Nomenclature
Guide to the identification system used for RTP Company products.

EMI Primer
The nuts and bolts of EMI and how thermoplastics can function as a shield.

No information supplied by RTP Company constitutes a warranty regarding product performance or use. Any information regarding performance or use is only offered as suggestion for investigation for use, based upon RTP Company or other customer experience. RTP Company makes no warranties, expressed or implied, concerning the suitability or fitness of any of its products for any particular purpose. It is the responsibility of the customer to determine that the product is safe, lawful and technically suitable for the intended use. The disclosure of information herein is not a license to operate under, or a recommendation to infringe any patents.