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The superficial modifications take place thanks to the high plasma reactivity and processes trigger:
  • physical type (bombing of the surface);
  • chemical type (reactions with radicals).
The processes concern:
  • reaction of atomos insertion or complete chemical groups (grafting);
  • generation of free radicals on the surface (attivazione);
  • polymers deposition in a gaseous phase as thin layer adherent to the surface (film deposition);
  • Superficial ablation of the material (etching).

ADVANTAGES
innovation:

  • It generates innovative materials and new surface properties.
  • It does not modify the bulk property of the material.

Environment:

  • Negligible quantity of chemicals.
  • Dry process, which does not require solvents or chemicals dangerous for the environment.

The DBD technology with respect to the plasma common technologies operates at atmospheric pressure:

  • Production processes in continuous way.
  • Process times are highly reduced.
  • All disadvantages due to the preparation of vacuum plants are avoided.
  • It is not necessary to use seal devices.
THE APPLICATIONS
  • Increase of wettability.
  • Increase of hydrophilicity.
  • Water-repellent and oil-repellent surfaces achieved.
  • Biocompatibility (antibacterial properties of adhesion and affinity to proteins and other bio molecules).
  • Dyeable (increase of dyeing speed).
  • Print (increase of absorbed colour quantity by the textile fibres).
  • Adhesion (increase of spreading adhesion with specific compounds).
THE FABRICS
It is applied to fabrics and yarns of natural and artificial fibres without modifying their bulk properties:
  • The organoleptic properties and the transpiration are unchanged.
  • Fabrics with multifunctional properties can be obtained.
  • They can be applied to all textile-working phases from the fibre until fabric finishing process.
  • They can be easily introduced into the productive processes.
The materials that can be functionalised are: polypropylene, polythylene polyester, nylon, natural textile fibres, etc...
  • Fabric for clothing.
  • Fabrics for furnishings.
  • Technical fabrics (filtration, medical, pharmaceutical).
  • Non-woven fabrics.
THE MACHINE
  • It is based on DBD discharges.
  • It operates under atmospheric pressure with air or inert gas and several gas mixtures.
  • It produced plasma between two or more electrodes in which the fabric runs.
  • Different speeds (1-60 m/min).
  • Treatment on one or both fabric sides.
  • Fabric width up to 400 cm.
  • Stainless steel AISI 304 body, fabric transportation rollers, suction at the entry and exit.
  • Two corona affect stations for treatment on both fabric sides or for a double treatment on a single side.
  • High tension/frequency electric generator, with automatic control power, PLC controlled.
  • Electrical board constaining all the and control devices.
  • Self-centering contact batching device.