For EMI/RFI shielding of plastic housings and plastic components
Applying electrically-conductive nickel coating 3800 series is a fast and easy method for EMI/RFI shielding/screening of plastic enclosures/housings. Youe electrostatically sensitive applications can be shielded by using an electrically conductive paint containing nickel, copper or silver.
The paint comes in aerosols (Part number 3801) for easy use, but can also be supplied in tins of 5 liters, 7 kg (Part number 3805) and tins of 20 liters, 28 kg (Part number 3820) if you need larger quantities. Materials such as iron-chromium-aluminium and molybdenum disilicide are used for higher temperature applications.
Some oxide ceramics are used as conductors and semi-conductors for specialized applications. To fulfill the requirements concerning the limits of immunity and emission to interference, plastic housings and components need to be coated either fully or selectively with an electrically conductive coating. The nickel-conductive coating is contained in an air-drying acrylic resin.
The resin becomes touch dry 15 minutes after application and achieves maximum conductivity within 24 hours. It is intended to prevent electrical interference which penetrates enclosures made from thermoplastics and other insulating materials. The coating also prevents static build up.
It is recommended that an grounding connection is made to achieve maximum shielding performance. A suitable material for this is Part number 3201, Copper shielding tape which can simply be stuck onto the coated surface or over-sprayed with the electrically-conductive nickel coating. The coating, once it has been applied, has a mat gray textured finish.
|Flash point (Abel closed cup - method IP 33/59)||25 deg C|
|Recommended dry film thickness (ASTM D 4138-82)||50 microns (2 thou)|
|Specific gravity||1.5 g/cc|
|Coverage per litre at 50 microns||7-10 square metres|
|Drying time: touch||15 minutes|
|Drying time: full||12 hours|
|Adhesion (BS 3900 E6)||Excellent|
|Pencil hardness (ASTM D3363-74)||H|
|Shelf life||12 months|
|Surface resistivity at 50 microns (2 thou) ASTM D257||0.5 Ohms/square or less|
|Viscosity when thinned 1:1 with *** thinners||0.6p on a cone & plate, 27-32secs on a B4 flow cup|
3800 series - Conductive nickel coating
Please note : These values are measured under laboratory conditions. Results may vary in other situations; please read our Guarantee.
Surface preparation: All contaminants including mould release, grease and dirt must be removed. Mask areas that do not require coating. A suitable primer may be necessary on certain substrates such as Polyethylene and Polypropylene, etc.
Mixing and application: Care must be taken to ensure the concentrate is thoroughly mixed to ensure that all the solids are in suspension.
Electrically-conductive nickel coating may settle out and regular agitation is recommended during spray application. The paint should be diluted with thinner *** to suit local spray conditions. Typically 2 parts of concentrate to 1 part thinner can be used in a conventional gravity-feed spray gun or, alternatively, a pressure pot with agitator. Gun pressure of 30 psi is recommended. Two passes are normally required to achieve optimum thickness and surface resistivity values.
Brush coating: Brush coat from the can, or thinned to suit the application.
|You can order via our orderform. For a custom quote please contact us. Prices are ex. work & ex. VAT.|
|3801||Aerosol 365 ml||€ 125,-|
|3805||Tin 5 liters (7 kg)||€ 185,- /kg|
|3820||Tin 20 liters (28 kg)||€ 179,- /kg|
For easy application of the electrically-conductive nickel coating, we have a small sprayer which is to be connected to a compressor. You can also order directly in our Webshop below.
To get a quotation for Conductive nickel coating within 24 hours fill in the form below.