Stress-whitening-resisting glass fiber reinforced polypropylene composite and preparation method thereof
A technology of anti-stress whitening and polypropylene, which is applied in the field of polymer materials, can solve the problems of molecular chain breakage and slippage, affect the appearance of interior parts, cracks, silver streaks and holes, etc., to reduce breakage and slippage , Increase rigidity, reduce stress whitening effect
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Embodiment 1
[0034] The first step: 82 kg of polypropylene PP7033N (melt flow rate is 8g / 10min), 0.1 kg of phenolic heat stabilizer 1010, 0.1 kg of phosphite heat stabilizer 168, 0.3 kg of processing aid EBS, 0.2 kg Hindered amine light stabilizer 770, 0.3 kg polypropylene special nucleating agent TMP-5, 5 kg ethylene octene copolymer POE LC670, 2 kg maleic anhydride grafted polypropylene CA-100, 5 kg 3000 mesh talcum powder The high mixer is fully mixed;
[0035] The second step: the mixture obtained in the first step is delivered to a twin-screw extruder with a length-to-diameter ratio of 30:1 at a rate of 95 kg / hour, melted and dispersed, and the rotating speed is 200r / min, from the feeding section to the extruder The temperature of each zone of the head is set to 140°C, 200°C, 200°C, 200°C, and 200°C; at the same time, 5 kg of Chongqing International chopped alkali-free glass fiber is 305K, and the chopped glass fiber is passed through the weight loss weighing scale from the side feedi...
Embodiment 2
[0039] The first step: 61.5 kg of polypropylene PP K9017 (melt flow rate is 17g / 10min), 0.5 kg of phenolic heat stabilizer 1010, 0.5 kg of phosphite heat stabilizer 168, 0.5 kg of processing aid A-C540A , 0.5 kg hindered amine light stabilizer 944, 0.5 kg polypropylene special nucleating agent HPN-20E, 12 kg ethylene octene copolymer POE5062, 4 kg maleic anhydride grafted polypropylene Bondyram1001CN, 10 kg 5000 mesh talcum powder The high mixer is fully mixed;
[0040] The second step: the mixture obtained in the first step is transported to a twin-screw extruder with a length-to-diameter ratio of 40:1 at a rate of 90 kg / hour for melting and dispersion, and the rotating speed is 220r / min, from the feeding section to the die The temperature of each zone is set to 140°C, 200°C, 210°C, 220°C, and 200°C; at the same time, 10 kg of Zhejiang Jushi chopped alkali-free glass fiber 508A, and the chopped glass fiber is fed from the side feeding port by 10 kg through a weight-loss weigh...
Embodiment 3
[0045] The first step: 47 kg of polypropylene PP K9026 (melt flow rate is 22g / 10min), 1 kg of phenolic heat stabilizer 1010, 1 kg of phosphite heat stabilizer 627A, 1 kg of processing aid stearic acid Zinc, 1 kg of hindered amine light stabilizer 622, 1 kg of special nucleating agent HTPUTRA5 for polypropylene, 16 kg of ethylene octene copolymer POE8130, 7 kg of maleic anhydride grafted polypropylene Bondyram1001, 15 kg of 3000 mesh talcum powder The mixer is fully mixed;
[0046]The second step: the mixture obtained in the first step is transported to a twin-screw extruder with a length-to-diameter ratio of 40:1 at a rate of 90 kg / hour for melting and dispersion, and the rotating speed is 240r / min, from the feeding section to the die The temperature of each zone is set to 140°C, 200°C, 220°C, 230°C, and 200°C; at the same time, 10 kg of Zhejiang Jushi chopped alkali-free glass fiber 508B, the chopped glass fiber is fed from the side feeding port by 10 kg through a weight-loss...
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