The present invention discloses a high CTI polyphenylene sulfide composite material and its preparation method, falling within the field of composite materials technology. The raw materials for the composite material of the present invention include: 20-40 parts of PPS resin, 20-65 parts of modified magnesium hydroxide, 1-15 parts of modified toughening agent, 0.1-1 part of lubricant, 0.1-1 part of carbon black, and 20-40 parts of short glass fiber. The preparation method comprises: mixing the weighed PPS resin and modified toughening agent to obtain a premix; adding modified magnesium hydroxide, lubricant, and carbon black to the premix and mixing to obtain a mixture; discharging the mixture from the main feed loss-in-weight feeder and discharging the short glass fibers from the side feed loss-in-weight feeder; The short glass fibers and mixture are fed into a twin-screw extruder for high-temperature melt extrusion, cooled in a water bath, and pelletized using a pelletizer to produce polysulfone composite pellets. The high-CTI polysulfone composite material of the present invention exhibits excellent resistance to tracking and leakage, with a CTI value as high as 600V. It also possesses superior mechanical properties, including good tensile strength, flexural strength, flexural modulus, and impact strength.
Country Code: CN
Application Number: CN202210768393.5
