Plasmatreat GmbH

Queller Str. 76-80

http://www.plasmatreat.de

+49 5204 9960-0, -99

Plasma Sealing Technology (PST) is an innovative plasma coating for plastic-to-metal bonds in the injection molding process. As a result of developing new precursors and extensively adapting the plasma parameters, the designers of the PST process have succeeded in selectively incorporating several functions into a single layer. These include good bonding to the metal surface, enhanced corrosion resistance, the formation of a barrier to media and oxidation and adhesion-promoting properties for plastics. Whilst the silicon contained in the layer facilitates layer adhesion to metal and metal oxide, silicon oxide is responsible for the barrier effect and media tightness. The organic components in the layer (functional groups) are responsible for the adhesive bond with the polymer. As a further plus point, this coating is non-hazardous, low-odor and environmentally friendly. The PST process not only ensures the strong adhesion of the material bond, but also its media tightness and the corrosion resistance of the metal inlay. The covalently bonded plasma polymer seal forms a long-time stable barrier to water, salt solutions, oils and gases and prevents these media migrating below the surface. If water penetrates the boundary layer of the plastic-to-metal bond, it can lead to corrosion, failure of the component function or even delamination. Since the plasma polymer layer fills every cavity, leaving the water no opportunity to penetrate the boundary layer, the covalent bond provides corrosion protection.