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1B31 Acrylic conformal coating problems

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#63385

1B31 Acrylic conformal coating problems | 26 December, 2010

Dear Sir,

We are using 1B31 conformal caoting of 48 sec viscosity in Zahn #1 cup, by machine(PVA354) application with Tank air pressure 2.3 psi, automising air pressure 1 psi. 7 days after application we are observing peeling off problem.. And not satisfying the cross- cut test also... please clarify our doubt.. Your reply in this regard is highly appreciated..

Regards, Raghuveer S.

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Lou

#63388

1B31 Acrylic conformal coating problems | 27 December, 2010

Contact your distributor for the coating or Humiseal directly. Humiseal has had a recent issue with batches of 1B31. The specific problem is lack of adhesion, which is what you have as well. You need to find out if your batch # is one of the affected batches. If so they will gladly replace it with a good batch.

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#63408

1B31 Acrylic conformal coating problems | 3 January, 2011

> Contact your distributor for the coating or > Humiseal directly. Humiseal has had a recent > issue with batches of 1B31. The specific problem > is lack of adhesion, which is what you have as > well. You need to find out if your batch # is one > of the affected batches. If so they will gladly > replace it with a good batch.

> Contact your distributor for the coating or > Humiseal directly. Humiseal has had a recent > issue with batches of 1B31. The specific problem > is lack of adhesion, which is what you have as > well. You need to find out if your batch # is one > of the affected batches. If so they will gladly > replace it with a good batch.

Dear Sir,

Thanks for your reply. actually by reducing the thickness of coating we rectified the problem...

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Plasma Prior to Conformal Coating

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