Equipment and method for preparing continuous carbon fiber reinforcement PEEK thermoplastic preimpregnating belt

Abstract

The invention discloses equipment and method for preparing a continuous carbon fiber reinforcement PEEK thermoplastic preimpregnating belt. The equipment for realizing the method adopts 4 stagger heatrollers and an infrared drying tunnel which are arranged in an S shape. The method comprises the following steps that after preliminary impregnating is performed on used PEEK resin particle materialsor used PEEK resin powder and two sides of continuous carbon fiber yarn, the used PEEK resin particle materials or the used PEEK resin powder and two sides of the continuous carbon fiber yarn jointlyenter front high-temperature heating rollers for heating, and extruded impregnating; then the preimpregnating belt enters the four stagger heat rollers to perform S-shaped propelling, and in the propelling process, impregnating is realized for four times, so that resin molten mass on two sides of the preimpregnating belt and carbon fibers are sufficiently impregnated, and the situation that a resin rich layer is generated on two sides of the preimpregnating belt is avoided; after being processed by guide rollers, the propelling direction of the impregnated preimpregnating belt is parallel tothe infrared drying tunnel; the impregnated preimpregnating belt is slowly cooled in the infrared drying tunnel to eliminate residual stress, so that the resin molten mass on two sides of the carbon fiber can be repeatedly extruded and impregnated, the impregnating effect is greatly increased, and the porosity of the preimpregnating belt is reduced; and the preimpregnating belt slowly passes through the infrared drying tunnel, so that slow temperature lowering is realized, and the residual stress produced in the S-shaped propelling process is released to a great extent.

Description

Technical field [0001] The invention belongs to the field of thermoplastic prepreg tape preparation, and in particular relates to a production equipment based on a specific prepreg tape, which prepares continuous carbon fiber reinforced PEEK thermoplastic prepreg tape through steps such as melt extrusion, hot roller molding, cooling and shaping. Background technique [0002] As a high-performance crystalline engineering plastic, polyetheretherketone (PEEK) has excellent mechanical properties, environmental resistance and corrosion resistance, and has become a hot topic in aerospace, transportation and other fields; however, due to its high viscosity, its The processing performance is not ideal, and the fluidity is poor in the molten state above 343°C. Therefore, the production equipment and methods of continuous fiber-reinforced thermoplastic composites for common thermoplastic resins such as polypropylene and polyamide are not suitable. Independent research and development of...

AI Technical Summary

Problems solved by technology

These patents propose the preparation method of general-purpose thermoplastic resin prepreg tape, but it is not suitable for engineering plastics with extremely high processing temperature - PEEK resin. This patent is devoted to the preparation of a continuous carbon fiber reinforced PEEK resin prepreg tape by melt impregnation method The production line can not only achieve the successful preparation of continuous carbon fiber reinforced PEEK resin prepreg tapes through the cooperation of high-temperature extruders and high-temperature hot-pressing rollers, but also prepare prepreg tapes with different properties by adjusting the production process and equipment parameters. Meet the material needs of different fields

[0005] Generally speaking, it is difficult for the existing domestic continuous fiber-reinforced thermoplastic resin prepreg tape manufacturing technology patents to fully infiltrate the continuous fibers with the PEEK thermoplastic resin system. Resin prepreg tape has considerable mechanical strength. On the other hand, the apparent physical properties and basic mechanical properties of prepreg tape are not stable enough to meet the requirements of the composite material preparation process.

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