Atmospheric Plasma Treatment Systems

Atmospheric Plasma Treatment and Coating Systems


  - High Dyne Long Lasting Surface Energy 

  - Cleaning of Organic Contaminants

  - Anti-fog

  - Hydrophylic

  - Hydrophobic

  - Oleophobic

  - Surface Slip for Preventing Sticking of Fatty Foods  

  - Antimicrobial - Antibacterial

  - Other Functionalities

  - Rugged Construction

  - Wide Web Systems


Polymer Materials

Synthetic and Natural Fibers


Metal Surfaces


Glass Surfaces

Sigma’s Atmospheric Plasma (APT) system is designed to provide superior quality surface treatment on a broad variety of substrates that includes, fabric, films, foams, powders, paper and foils. Sigma’s APT system incorporates both ceramic and metal electrodes, powered by a mid frequency generator with PLC controlled gas mass flow system, for controlling the plasma gas through the electrodes. One or more plasma gasses can be fed into the treater, alone or in combination with functional monomers.  Sigma has developed large scale systems for converting functional monomers into vapors.

Examples of Atmospheric Plasma Treatment Systems

Treater Inline with a BOPP Extrusion Line                                      Two Sided Treater for Treating Texiles

Inline high energy treater with air exclusion system

Plate Treater for SiOx Coating

on Polycarbonate Extrusion 

Lab System for Batch 

and Roll to Roll Treatment

Plasma Treater for Cleaning

Hard Disc Drive Heads

Electrode Adjustment

Not Required 

New APT3 - Atmospheric Plasma Technology:  

Provides high level plasma gas sealing, which minimizes contaminants and reduces the quantity of inert and reactive gases injected into the plasma region.   The APT3 plasma treaters incorporate a self-adjusting electrode system, which eliminates the need for adjusting the gap between the electrodes and the substrate 


The atmospheric plasma systems shown above can opearate in one or more of the following operating modes:


  1. Atmospheric Plasma: Using helium/argon and reactive gases for applications that require uniform treatment (in contrast corona which involves streamer type discharges)

  2. Functional Nano-Coatings by Injection of Organic Monomers Into the Plasma: This process is used to create  grafts and nanothick coatings that have durable and unique surface functionalization properties. 
  3. Chemical Corona (a pseudo-plasma discharge):  Created by feeding reactive gases into the treater, without the use of He or Ar.   This is a low cost alternative to plasma for obtaining unique treatment of surfaces without the use of high cost inert gases.

  4. Conventional Corona: Superior to most conventional corona due to electrode configuration and generator frequency.