Plasma pretreatment for manufacturing car interior parts with VOC-free coating systems

All the surfaces of plastic parts to be installed in car interiors are coated to improve both their feel and their acoustic performance. The automobile industry faces the major challenge of drastically reducing VOC emissions from solvent-based materials in car interiors. Consequently, preference is given to coatings based on polyurethane (PU) or to UV coatings. However, these VOC-free coating systems require the substrate to have a high surface tension, which can only be achieved through efficient and uniform pretreatment.

Steering wheel trim

Plasma treatment is a simple and effective way of activating these surfaces. A unit consisting of robots and rotating Openair® plasma jets is integrated directly in the production line. The time required for pretreatment with plasma – before coating of steering wheel trim, for example – is less than 10 seconds per part.

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