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Corona or/and plasma surface treatment

2007

We clean the polycarbonate sheets by solvent for bond it to the aluminum by using adhesives. Sometimes we get delamination. The reason could be non-surface treated of the polycarbonate.

In order to over come that, I have been thinking of using the corona or plasma treatment.

Please could anyone give me the positive and negative points of using this method.

Salar Modaresi
Engineer - UK

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2007

Salar

The problem with bonding to polymers is twofold.

1/ The correct adhesive

2/ Cleaning the surface. The usual surface contaminant on polymers is either low molecular weight polymer on the surface or non-stick agents applied to prevent the polymer bonding to the mould. The easiest and cheapest way to clean the surface is a detergent wash followed by thorough rinsing. The problem with solvents is that they can evaporate and re-deposit whatever grease they have dissolved.

Plasma/ corona are very good and VERY expensive. I would try the simple solution first.
But I would also take advice from the adhesive supplier.

Geoff Smith
Hampshire, England