Premix Thermoplastics Introduces New
EMI Shielding Compounds
Milton, WI (April 28, 2006) Premix Thermoplastics, Inc., a custom
compounder of electrically conductive thermoplastic compounds, has
introduced a full line of EMI shielding compounds for electronic enclosures
called PRE-ELEC® EMI. These new products complete Premix¹s line of EMI
shielding compounds for the complete electronics enclosure. Premix has, or
can develop, specialty compounds to solve EMI problems in most electronics
enclosures. These materials offer one-step EMI solutions.
Available in virtually any thermoplastic resin system, PRE-ELEC EMI
compounds utilize stainless steel fibers, carbon fibers, or nickel coated
carbon fibers to provide EMI shielding capability. Presently these compounds
are available in PP, ABS, POM, PC, PBT, PA-6, PA-66, PPS, PSul, PES and
PEEK. Other polymer systems that contain these conductive additives are
TPU¹s, and various fluoropolymers.
Compounds utilizing stainless steel fiber additives are available in
either a fully compounded form or a dry blended form. With the dry blended
form, all of the additives in the compound are in the resin except the
stainless steel fibers. These are blended into the resin in the form of a
concentrate, thus preserving the fibers in a linear manner, which enhances
the EMI shielding capability. The physical and thermal properties of both
the fully compounded and the dry blended forms are identical.
Compounds using carbon fibers or nickel coated carbon fiber additives
are available only in fully compounded forms. Compounds containing
30%
carbon fiber additives can provide >30 dB electromagnetic interference
attenuation. At 40% carbon fiber, it is possible to achieve >40 dB
shielding effectiveness (SE), and at 50% carbon fiber >50 dB SE can be
obtained. Nickel coated carbon fibers can be effective with as little as
15% in the compound, and they can provide upwards of 90 dB shielding
effectiveness at higher loadings.
The new PRE-ELEC EMI compounds were developed to complement Premix¹s
PRESEAL® product line, which is based on SEBS elastomer and filled with a
variety of silver coated and/or nickel coated particles. PRESEAL compounds
are used for injection molding and extruding EMI gasketing materials. They
provide an ideal replacement for silicone gasketing materials because they
are easier to process and are recyclable (scrap can be reground and remolded
or extruded). Most PRESEAL compounds provide 90 dB or more of shielding
effectiveness; and some compounds have compression set as low as 30%.
Premix Thermoplastics, Inc. is a subsidiary of Premix Oy, a leading
manufacturer of electrically conductive compounds in Europe. It offers
customers innovative, reliable and safe plastics raw material solutions in
applications ranging from ESD proof packaging to EMI shielding. Premix
products are available for film, sheet and injection molding applications.
For more information on PRE-ELEC EMI compounds, please contact Premix at
1-888-284-3304, e-mail sales@premixthermoplastics.com or visit the website
at. www.premix.fi.
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NOTE: If you would like a copy of the photograph that accompanies this
release, please email Kris Jommersbach at krisj@geminiinc.com
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