Production line and production method of thermoplastic composite material prepreg unidirectional tape

Abstract

The invention discloses a production line and production method for a prepreg one-way band of thermoplastic composite material. The production line is formed by successively connecting a fiber unreeling device, a front traction device, a water logging device, a pre-heating device, a film unreeling device, a hot-press device, a film reeling device, a rear traction device and a one-way band reeling device. The production method comprises the steps: fiber traction yarn-laying; fiber water logging; fiber pre-heating; hot-press; and traction reeling. The production line and the production method are used, the fiber yarns are soaked in the soaking liquid after unreeling, and the surface of each fiber yarn is adhered with the resin powder in the rolling soaking liquid under the normal temperature; pre-heating and drying, the resin powder is fused to the glue state, and is condensed on the surface of the fiber; and the molecular chains of the resins between fibers are connected by the hot-press device, and the bubbles are discharged, so the resin are totally soaked in all fibers, the fibers are integrally connected to form the prepreg one-way band of thermoplastic composite material.

Description

technical field [0001] The invention relates to the technical field of thermoplastic composite material production, in particular to a production line and production method of thermoplastic composite material prepreg unidirectional tape. Background technique [0002] At present, the composite materials used in the field of aerospace technology include traditional thermosetting composite materials and more advanced high-performance thermoplastic composite materials. Among them, the thermosetting composite material uses reinforcing fiber as the carrier, the resin base used is epoxy resin, the melting temperature is 80°C, the molding and curing temperature is 120°C, the required curing time is 8 hours, and more expensive autoclave equipment is required for molding. . Thermosetting composites are poor in environmental friendliness and waste is difficult to recycle. These conditions restrict its application expansion. Compared with thermosetting composite materials, advanced th...

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Problems solved by technology

[0004] Although the domestic production of thermosetting composite materials has relatively mature technology, the epoxy resin used in thermosetting composite materials has good fluidity at melting temperature and can penetrate between fibers, while the resin of thermoplastic composite materials is polymer Powder, such as PEEK (polyetheretherketone), which is white powder at room temperature, melts into a viscous jelly at a melting temperature of 340°C, has poor fluidity and cannot automatically penetrate between fibers

Therefore, the existing production methods and production equipment for thermosetting composite materials are not suitable for the production of thermoplastic composite materials. Therefore, independent research and development of production equipment and production methods for thermoplastic composite material prepregs is very necessary for the development of my country's aerospace industry

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