Standard Article

Prepreg Manufacturing

  1. James C. Seferis,
  2. Chris N. Velisaris,
  3. Vasileios M. Drakonakis

Published Online: 15 SEP 2011

DOI: 10.1002/9781118097298.weoc196

Wiley Encyclopedia of Composites

Wiley Encyclopedia of Composites

How to Cite

Seferis, J. C., Velisaris, C. N. and Drakonakis, V. M. 2011. Prepreg Manufacturing. Wiley Encyclopedia of Composites. 1–10.

Author Information

  1. GloCal/F.R.E.E.D.O.M., Seattle, WA

Publication History

  1. Published Online: 15 SEP 2011


Continuous carbon fiber impregnation by polymeric systems, either thermoplastic or thermosets, has been practiced for almost 50 years. The process defined as prepreg may be viewed as a viscoelastic unit operation in a classic chemical engineering sense, where the elastic fibers are impregnated with viscous polymers. However, to lead to a final solid laminate, the resulting product form requires further processing by the application of heat and pressure. This feedback on product quality and process specification cannot be easily accomplished on-line and in real-time, thus restricting in the application of quality principles to the prepreg process. By defining a series of dimensionless numbers, the prepregging process can be described on the basis of fundamental engineering principles and thus can reach beyond required limitations. This was the case for the development of double pass impregnation with thermosetting resins that gave rise to a layered structure exceeding in toughening most thermoplastic systems as well.


  • prepregging;
  • CFRP;
  • multilayer structures;
  • interlayer;
  • double impregnation