| 摘要 |
Pre-impregnated filamentary product comprised of continuous reinforcement fibres interpenetrated by a matrix of solid thermo-hardenable or thermo-reactive polymers arranged at the level of the unitary fibre and not bound with that fibre and protected by a shielding reacting with the polymer providing for the solid interpenetration during a temperature rise, and fabrication method thereof. The fabrication method comprises the following steps: introduction of thermo-hardenable or thermo-reactive material in the form of a powder having a grain size which is compatible with the dimensions of the unitary filaments of the fibre rovings; covering of said core impregnated roving by a polymer layer by coating, extrusion or lapping, which has the property of being compatible, to be combined or react in temperature with the powder polymer impregnating the roving. The assembly remains flexible since there is no binding between the fibre and the matrix and the composite is obtained only during the implementation which involves the temperature. The pressure and the time may be a complementary element for good achievements according to the resins in question. During the step which is the object of the invention, the pre-impregnated and shielded roving remains flexible and is characterized by a good handling for the making of flexible semi-products such as braides, knitted material, woven material or mats.
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