FIBOX Make Difficult Easy
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Painting is recommended for plastic enclosure batches of less than 500pcs (see also colouring of plastic enclosures). Aluminium enclosures are painted with polyester powder paint in standard RAL colours, according to the following process. Standard pre-treatment (passivation) method is Fe-phosphatizing. Yellow chromatizing and other special pre-treatments on request. Unpainted enclosures are also pre-treated; they are ready for the customer´s own powder or wet painting process. |
| EMC
Various shielding methods of plastic enclosures and their characteristics are shown in the table below. As the table demonstrates, Ni-Painting is clearly the most cost-effective option.
The best results in sealing the base-cover joint have been achieved with the special conductive gasket CHO-SEAL 1350. In combination with Ni-painting of the inside of the enclosure a relatively effective level of shielding is achieved |
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EMC Shielding Data Sheet of Plastic enclosures
30 MHz 1030 MHz |
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Standard CHO-SEAL 1350 gasket characteristics. This gasket is used by FIBOX for both plastic and aluminium enclosures. |
| Characteristic | Test procedure | |
| Elastomer binder | Silicone | |
| Conductive filler | Ag/Glass | |
| Volume resistivity Ohm-cm, max. as supplied without pressure- sensitive adhesive |
0.01 | CEPS-0002 |
| Hardness | 65 +/- 5 | Shore A |
| Elongation, min. | 75 % | ASTM-D412 |
| Compression set, 70 hrs. at 100 ° C, max. |
30 % | ASTM-D395 Method B |
| Low temperature flex TR10, min. |
- 55 ° C | ASTM-D1329 |
| Shielding effectiveness dB 100 Mhz E-field 500 MHz E-field 2 GHz Plane Wave 10 GHz Plane Wave |
100 100 90 8 |
Modified MIL-STD-285 Reference measured through 610x610 mm opening |
| Volume resistivity after heat aging Ohm-cm, max. |
0.01 | CEPS-0002 |
| Post tensile set volume resistivity Ohm-cm, max |
0.01 | CEPS-0002 |
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Shielding effect of aluminium enclosures |
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| dB 100 80 60 |
 30 MHz 1030 MHz |
Diagram: |
RFI shielding effect of FIBOX Euronord II AL 121208 aluminium enclosure; unpainted interior and Cho-Seal 1350 conductive gasket.
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PRINTED ENCLOSURES Plastic and aluminium enclosures
Tampo printing is the best solution for batches over 1000pcs. It is suitable for printing on both flat and curved surfaces of limited size; and tight spots like inside surfaces.
Both methods offer printing with 1 to 3 colours to RAL or PMS specifications.
B/W paper or film original suitable for printing will ensure a good printing result.
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