EMI shielding compounds based on stainless steel fibres are supplied as
masterbatch compounds that can be added at low levels, ensuring minimal effect on colour and processability. The compounds are non-abrasive and can be
pigmented. Shielding levels of 50 dB can be obtained with 1% addition of fibres,
by volume.
With the widespread use of clean room systems for manufacturing and
packaging critical products (such as medicals and pharmaceuticals) there has
also been growing interest in improved materials for construction and fitting out.
The specialist formulator TBA Electro Conductive Products caters for this need
with its new ECP 2000 static dissipation series, designed for 'clean room'
applications where the need is for washability, low off-gassing, and low
particulate contamination. Offered in a range of polymer matrices, the
formulations are permanently conductive and can be moulded on standard
equipment, in colours. Potential applications include packaging for medical
products, in-process carriers, fixturing devices, chip rails, vacuum tubing, and
machinery components.
Extremely thin-drawn filaments of stainless steel have been developed by
Bekaert under the name Beki-Shield, meeting EMI and ESD specifications at very
low loadings. Maximum effectiveness is reached at about 15% by weight. The
mechanical and physical properties of the plastic are only minimally affected and
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