Topic: Glow plasma. Pretreating blown film. Ink bonding on plastic film for packaging. An alternative to corona treatment.
The better alternative: plasma pretreatment for broad packaging film webs
Plastic
film is typically produced using blown
film and film stretching processes. The corona process is often used
to pretreat these films for printing and finishing processes, but
this poses its own problems. The corona process achieves only limited
surface tension that declines significantly after just a few weeks in
storage. And as an outcome of the process, even minor contamination
on pretreatment rollers can result in punctures on the reverse side
of the material.
Plasma treatment of packaging film webs
Secure ink bonding on plastic film packagingsPlasmatreat has developed two especially reliable techniques for pretreating packaging film with typical web widths of 2.2 to 8 meters:
- Plasmatreat Glow Plasma achieves especially cost-effective, durable surface activation at the highest level. Surface tensions of up to 64 mN/m are reached in the process.
- Openair® Plasma treatment with patented sheet die technology ensures absolutely single-sided pretreatment of plastic packaging films. Punctures on the reverse side are impossible; and the adhesion values show exceptional long-term stability. Openair® plasma’s advantages are especially evident at high processing speeds and when recycled materials are used.
