D-Preg technology principle:
The D-Preg technology can be described as follows:
- a system of 2 face to face electrodes connected to an alternative high tension generator
- electrodes protected by a suitable dielectric material
- space between adjustable according to the thickness of the fibrous support
The right quantity of powder is scattered onto the fibrous support. The fibrous support is then placed between the two dielectrics, and a strong alternative electric field is created by the high tension applied to the electrodes. At the end of the treatment, all the powder scattered on top of the support finds itself inside. In most cases, a 1 to 5s residence time is sufficient, and leads to a homogeneous distribution of the powder inside the support.
It is important to notice that no raise in temperature occurs inside the machine, and no static electricity remains inside the material at the end of the treatment. Energy consumption of the whole system is very low: for instance, a 4m long and 1.20m wide unit running at 10m/min (impregnating up to 1T/h material) requires less than15kW.S-Preg & T-Preg technologies:
Fibroline is constantly developing its technology portfolio to satisfy its customer needs. Fibroline developed a specific version of the D-Preg process dedicated to very high speeds (T-Preg). This solution concentrates the electric field applied to the material thanks to a very specific electrode construction. This T-Preg technology leads to shorter machines and is perfectly adapted to running speeds from 50 to 500m/min. First installations are running industrially since 2015, in particular for Hygiene.
Fibroline also extended its range of innovative solutions to applications requiring very low powder content and extremely accurate powder distribution (S-Preg). This configuration is used in particular for Medical or Biomedical sectors, and can be installed in combination with cleanroom solutions.