ABSTRACT
The processability and properties of high performance composites depend upon the composition of the fiber/resin preimpregnated materials from which they are manufactured. Modern analytical techniques and detailed knowledge relating to fibers, fiber surface treatments, and resin types and formulations are needed to characterize prepregs and composite materials. The length of each roll of prepreg shall be provided. Limits on the length of prepreg on any single roll shall be specified. Alternatively, suppliers and users may agree on limits for the prepreg weight or area per roll. Prepreg splices may be permitted on any roll of tape where processing is continuous without change in fiber or resin batch. Tack refers to the ability of a prepreg to adhere to itself or to material surfaces and is a key factor in determining prepreg suitability for component/part fabrication. Resin flow under specified test conditions relates to the composition, extent of reaction, and/or morphology of the prepreg resin, as well as the resin content.
