Plastics pipes' inner lining stops permeation

Plastics pipes' inner lining stops permeation

Plastics pipes are featured by many mechanic and physic properties, which predestine them to the substitution of metal-and ceramic pipes. Yet, their comparatively high permeability is a weak point.
Plastics pipes do stand out for their variety of design, low processing costs, high mechanic flexibility, low corrosivity, low specific weight and easy assembling technique. These qualities give reasons for the constantly increasing suppression of traditional metal- and ceramic pipes in many market fields. In the course of the progressing substitution, the comparatively high permeability of plastics pipes against the most different gaseous or liquid substances, is gaining an increasing but undesired importance in some sectors.
In the car-sector not only the plastics tank-walls' permeability is important but even the permeability of the walls of piping systems transporting liquid substances is decisive as well.
In the laying of drinkable water-plastics pipes in contaminated grounds, the permeation of external substances in drinkable water must be prevented to avoid both taste alterations and the creation of risks for health.
In the floor heating plastics pipes, the oxygen entry must be reduced by means of the tube plate to avoid corrosion in the metal kettle and flowing impeding mud.
Extremely high requirements for permeation- and migration's properties of polymer flexible tubes or pipes have to be taken account of within medical technology to prevent additives from blooming from plastics (such as the plasticizer). In single cases only can the need for barriers' improvement be developed with no decrease of the real benefits of plastics pipes. Plasma-supported lining procedures could be developed in other fields with reference to the context of this permeation problematic. A system-technology for the plasma-supported inner lining of plastics pipes has been developed at the Institute of Plastics Processing. This technology takes advantage of the benefits of microwave-stimulation.