Metallised Films
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a. Aluminum
b. Bi layer (Zn and Aluminum)
RoHS approved MPP film is also available with all types of Metallisation
Available sizes:
Thickness: 3.5 micron to 12 micron ((± 4%)
Total Width: 25,30,34.6, 37.5, 50,56,62.5, 75 & 100mm. (± 0.3 mm)
Free margin: 2.0 mm ((± 0.3 mm)
2. Roll Dia
Core ID : 75mm.
Splices : 2 Nos. maximum.
Roll OD : 325 mm mazimum.
Special dimensional requirements can also be made available on request.
3. Metallization
a. Aluminum : Conventional type metallization with Aluminum layer.
b. Bi layer with Heavy/Reindorced edges (Aluminium/Zinc Alloy) to provide excellent bonding to end spray.
Slope / Taper / Ramp
Linear slope is maintained while metallization by maintaining the resistance value of 2 Ohm per sq. at heavy edge and gradually achieving 20 ohms per sq. towards free margin side.
4. Advantages of Slope/Taper/Ramp
a. Since there is no sudden transition in resistance value between heavy edge to the active area, this feature makes the film electrically stronger & it can sustain more voltage surges as compared to the traditional MPP films.
b. During thr process of winding the surface to surface bonding in case of slop / taper MPP is extremely superior & this quality imparts NO AIRGAP between the dielectrics during winding. This helps in elimination of sparks near the heavy edge.
c. When the voltage is applied to the capacitor the current and heat distribution is absolutely uniform in case of slop / taper MPP Film.
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