Polyphenylene sulfide (PPS) has the advantages of high temperature resistance, corrosion resistance, insulation, and low moisture absorption rate. It is known as the five major "engineering plastics" and one of the eight major "aviation materials". Using carbon fiber as a reinforcement can greatly improve the impact resistance, high temperature resistance and corrosion resistance of this material, and expand its application range. At present, continuous carbon fiber reinforced PPS composite materials have been widely used in aircraft wings, nose cones, fuel tank flaps and other components, and have played special advantages in reducing weight and fuel consumption. In the future, this new type of composite material will have more uses in the electronics and electrical appliances, automobile industry, machinery manufacturing and other industries.
The quality level of continuous carbon fiber reinforced polyphenylene sulfide composite material has a great impact on laminates and winding pipes. The following is a brief introduction to the effect of continuous carbon fiber reinforced PPS prepreg tape on the performance of laminates and winding pipes.
Continuous carbon fiber reinforced PPS prepreg tape
The effect of continuous carbon fiber reinforced PPS prepreg tape on laminate performance:
The lamination process of continuous carbon fiber reinforced PPS composite material board is also a process of PPS resin re-impregnating carbon fiber. The resin's good infiltration effect and interfacial adhesion to carbon fiber help to exert the mechanical properties of this composite material. Among them, the layering direction and layer design of the unidirectional carbon fiber prepreg directly determine the mechanical performance of the laminate in the fiber direction and the vertical direction. For example, the orientation of the carbon fiber layup affects the tensile properties of the board. The higher the orientation of the carbon fiber, the greater the strength; the design of the carbon fiber layup affects the interlayer shear strength of the laminate, which in turn affects the impact resistance of the board. The bond between continuous carbon fiber and PPS matrix resin has a significant impact on the performance of the board. The greater the interface bonding strength, the stronger the board's overall resistance to external damage.
Therefore, it is necessary to ensure the uniform distribution of the carbon fiber tow and the reasonable distribution of the resin ratio in the prepreg tape. Once the carbon fiber tow is too concentrated or the resin is enriched, residual stress will be generated. When the plate is under load, the layer separation may occur, which affects the performance of the entire plate.
Continuous carbon fiber reinforced PPS sheet
The effect of continuous carbon fiber reinforced PPS prepreg tape on the performance of winding pipe:
The continuous carbon fiber-reinforced PPS prepreg tape is pressure-wound onto the core mold or the inner lining, and then cooled and shaped to obtain pipe products. This process has many advantages such as high productivity and stable quality.
Continuous carbon fiber reinforced PPS prepreg tape is closely related to the performance of the winding pipe. If the carbon fiber tow distribution in the continuous carbon fiber reinforced PPS composite prepreg tape is uneven, or the prepreg tape is not laid accurately or overlapped during the winding process, It will have a negative impact on the stability of the wall density of the carbon fiber pipe.
The immersion uniformity of the prepreg tape is directly related to the uniformity of the pipe. The content of carbon fiber tow and PPS resin in the prepreg tape should be kept at a reasonable ratio. If the content of the resin matrix is too much, defects are more likely to occur during molding, which increases the possibility of direct shear failure. In addition, if the porosity in the prepreg tape is too high, it will also adversely affect the ILSS and fatigue resistance of the pipe.
Continuous carbon fiber reinforced PPS pipe
At present, continuous carbon fiber reinforced PPS prepreg tapes are prepared by melt impregnation technology. The self-designed screw extrusion equipment can provide sufficient impregnation power when conveying molten polyphenylene sulfide resin. By improving the fluidity of the PPS resin, the PPS melt is enhanced. The overall coating and impregnation effect of the body on the carbon fiber effectively ensures the quality stability of the prepreg tape.