Painting of automotive PP parts without pre-treatment

October 29th, 2009

PP (polypropylene) is one of the most common thermoplastic materials used in the automotive industry. Due to its properties, the material also replaces more and more engineering plastics. But there are drawbacks as the PP has a nonpolar surface which does not allow the adhesion of paints or inks. But an unpainted surface is not acceptable for most applications. In addition normal PP grades have not sufficient UV resistance. Usually pre-treatment is needed in order to apply the paint to the part. But this belongs to the past!

The polarizing paint and primer system of the company Polysil ( www.polysil.de ) allows the application of the material directly to the parts surface without any pre-treatment. Significant cost savings can be achieved as the preliminary treatment step can be left out. Read more…

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