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Out-of-Autoclave Prepreg Processing

  1. Bryan Louis,
  2. Paolo Ermanni

Published Online: 20 JUL 2012

DOI: 10.1002/9781118097298.weoc056

Wiley Encyclopedia of Composites

Wiley Encyclopedia of Composites

How to Cite

Louis, B. and Ermanni, P. 2012. Out-of-Autoclave Prepreg Processing. Wiley Encyclopedia of Composites. 1–5.

Author Information

  1. ETH Zurich, Zurich, Switzerland

Publication History

  1. Published Online: 20 JUL 2012


Out-of-autoclave (OOA) preimpregnated (prepreg) materials are a prospective alternative to traditional autoclave (AC) processing, with the potential to reduce processing costs and build structures without size limitations imposed by the AC. OOA prepregs differ from AC-processed prepregs in that they are designed to be processed only with a vacuum bag and oven curing. This article details the state-of-the-art carbon/epoxy OOA prepreg systems. These systems are able to achieve void levels and mechanical properties similar to that of carbon/epoxy AC-processed prepregs. In this article, a brief insight into the processing of OOA prepregs is given for the following topics: laminate gas transport, vacuum bagging, tooling, and debulking.


  • out of autoclave;
  • prepreg;
  • carbon;
  • epoxy;
  • vacuum bag only processing