Surface preparation for printing or coating

It is often difficult to achieve good adhesion of inks and coatings on plastic medical components, as many of the polymers used in medical devices are naturally hydrophobic and have low surface energy. This results in poor ink adhesion, delamination or uneven coating during processes such as pad printing, inkjet marking or metallisation of the devices.

Surface preparation is therefore necessary to ensure reliable and durable printing.

Plasma surface treatment allows for precise modification of the surface without affecting the material in depth.

Increase wettability and surface energy

Many medical-grade polymers (e.g. PE, PP or PTFE) are highly hydrophobic, which prevents liquids such as inks, adhesives and biological fluids from spreading evenly. This poor wettability limits the performance of many applications.

Plasma treatment increases the surface energy of the material. This modification improves the distribution of liquids, enhances coating uniformity and promotes better adhesion between layers.