Long fiberglass-reinforced polypropylene composite material and preparation method thereof
A composite material and polypropylene technology, applied in the field of long glass fiber reinforced polypropylene composite material and its preparation, can solve the problems of insufficient strength, rigidity and heat resistance, and achieve good dimensional stability, low elongation at break, high resistance to good corrosion effect
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Embodiment 1
[0022] A preparation method of long glass fiber reinforced polypropylene composite material, comprising the following steps:
[0023] (1) Polypropylene, polypropylene grafted maleic anhydride, alkali-free long fiber, cooling masterbatch, antioxidant AT-215, KH-550, P-2015 according to 52.4:4:40:1:0.1:0.5 :2 ratio for mixing and stirring;
[0024] (2) Add the mixture obtained in step (1) into the twin-screw extruder. The barrel temperature of the twin-screw extruder is heated in ten stages. The heating temperature of the first to third stages is 180°C, and the heating temperature of the fourth to sixth stages is 210 °C, the heating temperature of the seventh to ninth stages is 210 °C, the die head temperature is 210 °C, the melt is extruded through the twin-screw extrusion die, the melt temperature is 220 °C, and transported to the impregnation device;
[0025] (3) Preheat and dry the continuous long glass fiber for 2 hours to make the temperature 80°C, and then transport it f...
Embodiment 2
[0028] A preparation method of long glass fiber reinforced polypropylene composite material, comprising the following steps:
[0029] (1) Polypropylene, polypropylene grafted maleic anhydride, alkali-free long fiber, cooling masterbatch, antioxidant AT-215, KH-560, P-2015 according to 52.4:4:40:1:0.1:0.5 :2 ratio for mixing and stirring;
[0030] (2) Add the mixture obtained in step (1) into the twin-screw extruder. The barrel temperature of the twin-screw extruder is heated in ten stages. The heating temperature of the first to third stages is 190°C, and the heating temperature of the fourth to sixth stages is 220 °C, the heating temperature of the seventh to ninth stages is 215 °C, the die head temperature is 210 °C, the melt is extruded through the twin-screw extrusion die, the melt temperature is 220 °C, and transported to the impregnation device;
[0031] (3) Preheat and dry the continuous long glass fiber for 3 hours to make the temperature 85°C, and then transport it f...
Embodiment 3
[0034] A preparation method of long glass fiber reinforced polypropylene composite material, comprising the following steps:
[0035] (1) Polypropylene, polypropylene grafted maleic anhydride, alkali-free long fiber, cooling masterbatch, antioxidant AT-215, KH-550, P-2015 according to 52.4:4:40:1:0.1:0.5 :2 ratio for mixing and stirring;
[0036] (2) Add the mixture obtained in step (1) into the twin-screw extruder. The temperature of the barrel of the twin-screw extruder is heated in ten stages. °C, the heating temperature of the seventh to ninth stages is 220 °C, the die temperature is 210 °C, the melt is extruded through the twin-screw extrusion die, the melt temperature is 220 °C, and transported to the impregnation device;
[0037] (3) Preheat and dry the continuous long glass fiber for 4 hours to make the temperature 90°C, and then transport it from the die head to the impregnation mold, the mold temperature is 100°C, so that the long glass fiber is fully impregnated by...
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