Surface treatments

For certain bonding operations, ADDEV Materials offers Corona or Plasma-type surface treatments.

Corona treatment

The Corona treatment involves generating an electrical discharge with electrodes at the surface of a film which increases its surface energy to improve the chemical connection between the film molecules and the liquid applied.

Plasma treatment

Atmospheric plasma technology is used to treat the extreme outer surface (a few nanometers) of flexible plastic or mettalic backing materials. The process selectively changes the chemical properties of the substrate or applies a nano-coating with a view to producing either a non-stick effect or an adhesion-promoting effect.

Benefical effects of these treatments :

  • The technology is recognized worldwide as an effective surface treatment for improving film adhesion prior to further processing in extrusion, bonding or printing machines
  • The long-term stability of the treatments
  • Bespoke selection of the chemical property of the substrate which will be changed
  • The cost is equivalent to, or even less than, more conventional technologies

Typical treatments :

  • Corona treatment of polyester film
  • Corona treatment of Tedlar®
  • Corona treatment of PE film
  • Corona treatment of fluorinated film

Typical applications :

  • Preliminary step before printing, complexing, film-coating, hot rolling, extrusion-coating, etc.

Metallizing

This process applies a layer of aluminium (or another metal), a few nanometers to a few tens of nanometers thick, to a plastic film by evaporating aluminium in a vacuum. The metallizing of films can be used to vary their optical density. As the density is increased the film becomes more opaque.

Various films (polyester, polypropylene, Kapton® ,etc.) with a range of thicknesses can be metallized.

A few typical applications :

  • Food packaging, barrier effect, etc.
  • Aeronautics : storage, UV barrier films

A few typical products :

  • Metallized PET
  • Metallized KAPTON®
  • Metallized PEEK

Thermostabilization

The thermostabilization of films makes the materials less sensitive to variations in temperature.

ADDEV Materials product :

Politherm®thermostabilized film. This PET film is available in thicknesses from 70 to 125 µm. Once the film has been thermostabilized, exposure to extreme thermal environments causes almost no dimensional variations.

Some industrial applications of thermostabilization :

  • Screen printing 
  • Printed electronics 

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