HW-AFS change baffle material economical customized station

Although corona treatment has been used in the manufacture and treatment of plastics for more than 35 years, there was uncertainty for some time about the effect produced on the surface of the plastic, and about the corona process itself.

After detailed research in this field, we know today that the corona treatment effect is based on bombarding the surface of the polymer with electrons. These leave the electrode and are accelerated under high tension towards the passing material web. In doing this they collide with air molecules which transmit light and react in part to ozone and nitrogen oxide. When the electrons come into contact with polyethylene for instance, they have so much energy that they can break the bond between carbon-hydrogen or carbon-carbon. Reactions with the corona gas take place at these free radicals, mainly towards oxidation. The functional groups thus formed are polar and so provide the basis for adhesion of applied printing inks, lacquers, etc.

1. Single side corona treatment with excellent uniform sparks.

2. Change baffle to economical materials to achieve better cost performance.

3. The treatment width, speed, and electrodes all could be customized.

4. Adopting anti-punctured silicon tube as a medium with more than 10000 hours actual life.

5. All the machines would be checked and tested before shipment.

Engineers were testing the equipment before shipment

Configuration

Cover materials: organic glass / iron / stainless steel / aluminum
Electrodes: aluminum or ceramic discharge electrodes (customized from German)
Additional : open cylinders / outage protection / ozone emission holes

Tips: corona treatment applied on other machines

The applications of corona treatment are many, and range from pre-treatment of drinking cups and yoghurt beakers in cup printing machines, to pre-treatment in extrusion coating and laminating lines, as well as surface treatment of BOPP films up to 8,5 m wide in biaxial orienting machines.

Blown film extruder
The most frequent and at the same time the simplest application of corona treatment is the use with blown film extruders. In most cases the materials are polyethylene films which normally have to be treated on both sides.
Although these films sometimes contain considerable amounts of slip additives, it is normally no problem to
obtain surface tension of 44-46 dyn/cm or more.

       Please contact us for more machine technical details and proposals.