Plasma pretreatment enables the use of VOC-free and solvent-free adhesives and anti-friction coatings.

The main effect achieved by Openair-Plasma® pretreatment is activation of material surfaces. On the otherwise non-polar EPDM profile surfaces, it produces specific chemical functionalities (such as OH groups, COC, CH3, hydroxyl, carbonyl and carboxyl groups). In addition, it increases the surface tension to > 72 mN/m.

EPDM profile with anti-friction coating
EPDM profile before flock coating

This optimal preparation through plasma pretreatment makes it possible for the first time to use water-based adhesives and anti-friction coating systems that contain no VOCs (volatile organic compounds) to process EPDM profiles. Openair-Plasma® can be integrated easily into the process where it assures outstanding adhesion results.


Painting and bonding EPDM seals

EPDM profiles for the automobile industry are pretreated with Openair-Plasma® before painting or flocking at Hutchinson in Aachen, Germany. The advantages: scrap reduction, increased production, and the highest process safety reliability.

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