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Adhesion on polypropylene

I am trying to get a good adhesion on polypropylene. I paint this plastic
but cannot get a 5B adhesion rating

Dean Jones
industrial - Canada
May 30, 2011

Pass a naked flame over the surface...cool, then paint.

Terry Hickling
Birmingham, United Kingdom
June 8, 2011

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You can try using what is generally known as 'adhesion promoter' for refinishing shops. these are also used by OEMs for painting on bumpers which are made of plastic which contain a large amount of PP given its flexible properties.
The method of passing a flame works too but not practical on an industrial scale, and no doubt dangerous.

Ibrahim Ismail
- Cairo, Egypt
First of two simultaneous responses -- July 7, 2011

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If the problem is not already solved you may try plasma treatment.

H.R. Prabhakara - Consultant
Bangalore Plasmatek - Bangalore Karnataka India
Second of two simultaneous responses -- July 7, 2011

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