Flame Surface Pretreatment

Flam treatment machines for activating workpiece surfaces prior to coating

Plastic workpieces can be flame-treated with a gas burner prior to coating to improve the feel. Rather than being a form of heat treatment, flame treatment relies solely on the chemical effect of the gas flame.

  • procedure
  • area of applications
  • advantages


How flame treatment machines work

Flame treatment briefly exposes the surface to the direct effect of a gas flame fueled by excess oxygen. 

This breaks down the molecular bonds in the surface of the treated substrate and binds any active ions – particularly OH and COOH groups – in the flame. In this way, polar groups are generated in the originally nonpolar material that enable the reliable adhesion of printing inks, coatings, adhesives, and more. The development of polar groups increases the surface energy of the treated substrate, which can also be measured.

area of applications+

Flame treatment machines are used in the following industries:

  • vehicle manufacturing
  • plastics technology
  • glass and solar industry
  • printing industry
  • construction industry
  • aviation technology
  • optics
  • sensors
  • electronics
  • medical technology


The features and benefits of Venjakob flame treatment machines

Thanks to its modular design, the Venjakob flame treatment machine can be integrated into existing system technologies or delivered as a stand-alone solution. Flame treatment can be incorporated into continuous, robot, and spindle chain systems. Venjakob focuses entirely on your specific application and your existing production technologies.

Your contact person

Processes can be tested in realistic conditions at our in-house industrial laboratory. Share your requirement profile with us and include your material suppliers, and we’ll work with you to develop a solution.