Dry decoating of resilient floorings with non-thermal atmospheric pressure plasmas
IGF 18035 BG
Elastic floorings commonly are finished by a temporary coating based on polymers to achieve optimum cleaning conditions. The coating minimizes soil adhesion on the flooring surface. After extended wear periods – especially under conditions with extensive mechanical wear – it is necessary to strip the coating with chemicals (alkaline cleaners) followed by a re-coating process to renew the optical appearance and to minimize wearing effects. The stripping process shows significant disadvantages like long drying time prior the following re-coating, high labour effort and high consumption values of water and chemicals.
Aim of the research project was the development of a water-free basic cleaning process based on the use of atmospheric plasma. This process needs no drying procedure before re-coating. Consequence is a significant increase of the area performance because of minimized delays in the operating sequences. Therefore, in the first step renewable plasma active coatings were developed, which show both strong adhesion on the flooring and easy removability by plasma processing.
The coatings were developed in a two-layer process. The lower layer (intumescence layer) absorbs the plasma energy heat. This layer, in combination with a heat-conducting layer is split off during the plasma treatment. Further investigations focussed on the integration of plasma active intumescence layers into the covering of future generations of floorings by flooring producers. Finally, a functional model of a dry plasma based de-coating device was developed.
The plasma based basic cleaning process with associated mobile cleaning device reaches residue free removal of the two component system without damage of the elastic flooring at high area performance. The savings of staff costs and water lead to total savings in the range of 1 €/m² in comparison to common water based basic cleaning.
The research report is available on request from FRT.