Prozessentwicklung für die vollständige thermoplastische Beschichtung von Glasfilamenten im Spinnprozess

  • Process development for the complete thermoplastic coating of glass filaments in the spinning process

Lüking, Alexander; Gries, Thomas (Thesis advisor); Strube, Oliver (Thesis advisor)

Düren : Shaker Verlag (2021)
Book, Dissertation / PhD Thesis

In: Textiltechnik/Textile technology
Page(s)/Article-Nr.: III, 232 Seiten : Illustrationen, Diagramme

Dissertation, RWTH Aachen University, 2020


In this dissertation, an industrial process for coating E-glass filaments in the manufacturing process is being developed. The coating exhibits thermoplastic behavior. This enables it to be used in the production of organic sheets. The work runs through the scales from basic education to laboratory and pi-lot tests to industrial implementation. At first, the requirements for a thermo-plastic coating will be discussed. It becomes clear that a viscosity of the coating < 250 mPa∙s is required in order to guarantee a stable spinning pro-cess. Polypropylene is chosen as the coating material. The polypropylene is modified in order to cause as little friction as possible in the manufacturing process of the glass filaments. The glass filaments have a diameter between 10 and 17 µm. The thermoplastic coating covers each glass filament separately. A layer thickness of 0,5 – 3,5 µm is measured. The glass filaments are combined to form a yarn and then are consolidated to form an organic sheet. With the new manufacturing process, a fibre volume content of up to 81 vol. % is achieved. Commercially available organosheets only have a maximum proportion of 55 vol. %.A market overview is prepared for the analysis of an economic utilisation. In addition, a process cost calculation is carried out. Furthermore, the patent strategy is presented. The core of the economic analysis is the discussion about exploitation. Different scenarios of the marketing are considered. It becomes clear that a spin-off with contract production at an industrial glass fibre plant has the highest chances of success. The aim of the spin-off is the production and distribution of thermoplastic coated glass rovings. The developed rovings have a price of 1,82 €/kg. This means that the rovings are in the price range of commercially available hybrid yarns for the production of organic sheet at 2.00 8.00 €/kg. In addition, four potential fields of application for directly coated glass filaments are being developed. In addition to organic sheets, applications in textile concrete, geotextiles and industrial filters will also be presented.