| 释义 |
ˈprepreg, n. (a.)
[f. pre-impregnated ppl. a.]
A fibrous material (e.g. glass or carbon fibres) that is pre-impregnated with synthetic resin for use in the manufacture of reinforced plastics. Freq. attrib. or as adj.
1954R. H. Sonneborn Fiberglas Reinforced Plastics iii. 63 The pre-preg materials are fabrics or mats that are pre-loaded, using resin mixtures that are essentially the same as are used in standard molding operations. 1958D. J. Duffin Laminated Plastics iv. 72 Although more expensive than standard materials, prepregs are widely used in the aircraft industry and elsewhere because of the considerable savings in time—and therefore labor—costs. 1965Mod. Plastics Encycl. 1966 167/3 Pre-preg laminates are made by pre-impregnating glass cloth with a resin solution. 1969Sci. Jrnl. Feb. 43/3 Prepreg is made by dripping numerous tows or groups of fibres in a dilute solution of resin in acetone and then laying them down side by side..on a firm flat surface. 1972Physics Bull. Nov. 664/3 Fibre-polymer systems for the fabrication of composite parts are used either as prepregs, in which fibre and polymer are precombined and are ready for the fabrication operation, or as wet systems in which the dry fibre and the polymer are brought together during the moulding process.
Hence ˈprepreg v. trans., to pre-impregnate with synthetic resin; preˈpregged ppl. a.; preˈpregging vbl. n.
1964Oleesky & Mohr Handbk. Reinforced Plastics ii. iii. 77/2 Epoxy resins may be readily adapted to pre⁓pregging using glass fabrics or roving. Ibid. ix. ii. 545/1 The general specifications governing roving for filament winding also apply to roving to be prepregged. 1970Encycl. Polymer Sci. & Technol. XII. 26 ‘Sheet moulding compounds’ is the term used by the Society of the Plastics Industry to identify these new reinforced, basically pre⁓preged sheet compounds. |