Composite materials prepreg process

Figure 21.34 Polished cross-sections of equivalent UD tape and Liba NCF lamintes. (a) Unidirectional prepreg composite laminate, (b) Liba NCF composite laminate. Source Reprinted with permission from Mills A, Burley G, Backhouse R, 44th International SAMPE Symposium, May 23-27, 1999. Copyright 1999, The Society for the Advancement of Material and Process Engineering (SAMPE).

Figure L.I Horizontal treater for preparing prepreg for laminates. (Ref Harper, C.A., Laminates and Reinforced Plastic Materials and Processes , Handbook of Plastics, Elastomers, and Composites, 3 ed., C.A. Harper, ed., McGraw-HiU, New York, 1996)...

Vacuum bag moulding for retrofitting is a semi-automatic resin infusion under flexible tooling (RIFT) technique, which allows production of quality composites. In the RIFT process, dry GF are pre-formed in a mould and are taken to the side and attached to the structure. A resin supply is then channelled to the prepreg, and both are enveloped in a vacuum bag. The flow of resin into dry GF (preform) develops the composite material and the adhesive bond between composite and structure as well. 

The fabrication of pol)mer composites is complex. The nature and the shape of the materials used in the fabrication are numerous and the process may differ from one application to another. In the fiber composites materials, the fibers may be discontinuous or continuous. The former may be collimated the latter may be used as preforms or prepregs with complex architectme and flow. Rheology of such materials... 

The mechanical properties of FRP composites are dependent upon the ratio of fibre and matrix material, the mechanical properties of the constituent materials, the fibre orientation in the matrix, and ultimately the processing and methods of fabrication, which are the subject of Part II. Chapters discuss prepreg processing, liquid composite moulding (LCM), filament winding processes and pultrusion of advanced fibre-reinforced polymer (FRP) composites. 

Phenolic novolacs, 18 760-761 Phenolic resin adhesives, 18 783-784 Phenolic resin can coatings, 18 38 Phenolic resin composites, 18 792-794 Phenolic resin drying-oil varnishes, 18 783 Phenolic resin fibers, 18 797-798 mechanical properties of, 18 798 Phenolic resin foam, 18 795-796 Phenolic resin manufacturers, U.S., 18 774 Phenolic resin polymerization, 18 760-765 alkaline catalysts in, 18 762-765 neutral catalysts in, 18 761-762 strong-acid catalysts in, 18 760-761 Phenolic resin prepregs, 18 793 Phenolic resin production unit, 18 766 Phenolic resins, 10 409 18 754-755, 756-802 22 10 26 763 in abrasive materials, 18 786-787 in air and oil filters, 18 790 additional reactants in, 18 759 analytical methods for, 18 774-779 applications of, 18 781-798 batch processes for, 18 766 from biomass and biochemical processes, 18 769-770... 

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