Plasma activation for surface activation and modification
If surfaces have to be varnished, printed or glued, they require good wettability of the surface for good adhesion. Many surfaces show insufficient wettability even in a clean state, which is intensified by impurities. As a result, liquids like adhesives and inks roll off. This is because the surface tension is very low and insufficient for further processing. If unprocessed material is processed, the result is often that paint and varnish do not adhere properly and quickly come loose again or that bonded parts fall apart. This can be prevented with plasma activation and surface modification.
Plasma activation of a surface increases its surface energy and creates molecular anchor groups that correlate with those of the liquid. This manifests itself through improved wetting and leads to an optimized adhesion of suitable liquids.
Practical example: Plasma activation of polyphenylene sulfide
In the example, two polyphenylene sulfide components were treated with atmospheric pressure plasma from the plasmabrush PB3 system.
The following materials can be plasma activated:
Furthermore, plasma treatment of natural leather, artificial leather, natural fibre, wood or paper is also possible.
Advantages of plasma activation
- High process speed and reliability
- No running costs
- Environmentally friendly treatment without additional chemicals
- Easy inline integration and automation
Technical articles on the topic
Grounding of conductive substrates
When using PAA® technology, the ignited plasma bridge can be used for electrical grounding of conductive substrates.
Plasmacleaning – Article magazin “JOT”
Paint stripping and cleaning with plasma is possible with the high performance system plasmabrush® PB3 of relyon plasma.
Plasma-Oncology: Adjuvant therapy for head and neck cancer using cold atmospheric plasma
Summary of an interesting publication on basic research on the possible use of plasma as an adjuvant therapy for head and neck carcinomas.
Effects of Plasma Treatment on the Bioactivity of Zirconia Implants
Takao et al. investigate in vivo and in vitro the effects of plasma treatment on the bioactivity of zirconia/alumina nanocomposites (NANOZR) used as implant materials.
Visualization of Activated Area on Polymers
A visualization of activated area on polymers is done with test ink to evaluate atmospheric pressure plasma jets (APPJ). The shrinkage characteristics of the test ink are collected using activation image recording (AIR).