You cannot get a good omelette with bad eggs, similarly, it is not possible to get a good capacitor
with bad base film ( BOPP). There has been a spurt of base film manufacturers across the globe. Many of them having modified the packaging grade machines for capacitor grade films. This is dangerous not only for the manufacturer but also for the end user. The manufacturer may want to reduce the cost and win a tender, but the majority of the difficulties would be face by the end user. The capacitor is expected to have a life of 8 to 10 years, however with such films it barely survives the warranty periods.
A few of the better known sources of capacitors grade film
are given below-
It would be worthwhile, and in his own interest, for the end user to make an agreement
with the capacitor manufacturer to use any one of these above mentioned BOPP sources.
For more information on the process and the resin used for capacitor grade films, please check the link below.
Process-
Datasheet-
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