MCL61 mu-metal shielding film is a new shielding film made out of an amorphous cobalt alloy for protection against magnetic fields. Its effectiveness is 97% with a screening attenuation of 30 dB.
Contrary to the product description, this product is not the classic and very expensive MU-METAL®. YSHIELD uses a modern alloy that offers better protection on this protective film made for low-frequency magnetic alternating fields, LF electric alternating fields and high-frequency electromagnetic fields.
Shielding from static magnetic fields with MCL61
Unlike this MCL61 shielding film, classic MU-METAL® is capable of shielding from static magnetic fields, but its effect is very weak on the regular 0.1mm-thick films. The MCL61 shielding film’s alloy is made out of cobalt and offers better protection the higher the magnetic fields’ turbulence. Because static or permanent magnetic fields do not have any turbulence, they cannot be shielded against by the MCL61 shielding film.Request a free test sample
Convincing properties for the MCL61 shielding film
MU-METAL® is soft and sensitive. The shielding can quickly be lost through bending, bumping and processing. It reacts a lot differently with the MCL61 shielding film against magnetic alternating fields. The cobalt strips integrated into the film are even flexible with slight bends and stay hard. The screening effectiveness against magnetic alternating field remains high, even during heavy mechanical use. The cobalt strips are only 20 µm thick, 50 mm wide and are comparable to a very sharp knife.
These cobalt strips are laminated for protection, which brings another benefit – MCL61 is also corrosion-resistant in humid environments. Because of the MCL61 shielding film’s width of 61 cm, large surfaces are also covered considerably quicker than with the regular 15cm-thick MU-METAL® stripes. Furthermore, the MCL61 can be cut with traditional kitchen scissors.
Because the cobalt strips are only 20 µm thick, 50 mm wide and sharp like a knife, we have laminated them for protection. This lamination also makes the MCL61 corrosion-resistant in humid environments. With a width of 61 cm, large surfaces are covered quicker than with the 15cm-thick MU-METAL® strips. MCL61 can be cut with a pair of scissors.
- LF magnetic field attenuation: 30 dB (97%); The screening depends on the number of phases, the transposition of cables, the surface size, etc. Work extensively: shield cables with 1-2 strips and fuse boxes with 2-4 strips.
- Width: 61 cm
- Length: Yard goods / 20-meter rolls / 290-meter rolls; Because of the high manufacturing costs, we allow ourselves to cut the order quantity into pieces!
- HF screening attenuation: 75 dB
Processing of the MCL61 shielding film
One must be mindful of the cutting edges when processing the MCL61 magnetic field shielding film – they are comparable to a sharp knife. In principle, sticking the film on smoothly is laborious and difficult. Very often, small ripples remain visible. Therefore, we recommend covering the surface.
When sticking the film onto a well, ceiling or floor, use a highly-viscous construction adhesive (ex: Pattex Montage “Special”) that sticks to a non-absorbent surface. The process is always the same – smooth the adhesive, lay the film and straighten with a pressure roller or scraper. Let the MCL61 shielding film strips overlap, smooth them, and paint over them with commercial dispersion paint.
Because the shielding film also has an excellent screening attenuation of up to 70 dB against radio pollution, additional HF shielding paint is not needed. We generally recommend adding an earth. It should also be pointed out that the film is a vapor barrier on larger wall surfaces.
Grounding and screening of the MCL61 shielding film
The MCL61 magnetic field shielding film is electrically isolated. Nevertheless, electric fields can be protracted and transmitted. In order to stop this, a lock washer can be screwed onto each strip; these lockers will penetrate the polyester film. The MCL grounding set contains everything needed for 5 to 10 strips of MCL61.
Screening power of the MCL61 film
One layer of MCL61 reaches a screening attenuation of up to 30 dB against low-frequency magnetic alternating fields. Two layers can even reach up to 40 dB attenuation. The attenuation values are often checked in the laboratory – HF with ASTM D4935-10 and LF magnetic fields with ASTM A698/A698M-07.MCL grounding set
MCL61 magnetic field shielding film technical info
- Quantity / Length
Yard goods / 20-meter rolls / 290-meter rolls. Cut in measures of 1.0 running meter. Because of the high manufacturing costs, we allow ourselves to cut the order quantity into pieces! If tailor-cut, it is not possible to return or cancel the order. You can request a free sample.
- MF magnetic field screening
30 dB (97%) with one layer. Up to 40 dB with two layers. The screening depends on the number of phases, the transposition of cables, the surface size, etc. Work extensively: shield cables with 1-2 strips and fuse boxes with 2-4 strips.
- HF screening attenuation
Up to 75 dB. All attenuation values provided apply for 1 GHz. Measurements according to ASTM D4935-10 or IEEE Std 299-2006 or IEEEE Std 1128-1998 or ASTM A698/A698M-07.
265 g/m²; Thickness: 0.1 mm. Color: Silver
µ 2 = 10.000; µ 4 = 25.000; µ max. = 100.000;
- Bs saturation induction
- Hc coercivity:
- Br/Bs remanence
- Tc Curie temperature:
Polyester, Co69, Fe4, Mo4, Nb1, Si16, B7
Floor, ceiling, indoor walls, magnetic field, outdoor walls
- Field type
MF (Low-frequency magnetic alternating fields)
No cancellation for the MCL61 shielding film
Like for cuts, there is no right to return shielding fabric.
Please note that revocations do not apply to these products, because they were cut to the customer’s specifications. Reselling a tailored item is no longer possible. For this reason, it is possible to request a free MCL61 shielding film test sample. By ordering pre-finished products, waiving the statutory right to return goods is accepted.