Chopped glass fiber reinforced nylon composite material and preparation method thereof
A chopped glass fiber and nylon composite material technology, which is applied in the field of chopped glass fiber reinforced nylon composite materials and its preparation, can solve the problems of limited nylon use range, poor dimensional stability, large shrinkage rate, etc., and achieve rigidity improvement, size Stabilization and reduction of mold shrinkage
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Embodiment 1
[0035] (1) First dry nylon 6 in an oven at 90°C for 10 hours, take 100 parts of dried nylon 6, 0.1 parts of antioxidant 1010 and 0.2 parts of lubricant silicone powder, and mix them in a high-speed mixer for 3 minutes;
[0036] (2) Dissolve 0.05 parts of coupling agent 3-aminopropyltriethoxysilane (KH550) in absolute ethanol to prepare a coupling agent-ethanol solution with a concentration of 0.5%, and spray the solution by spraying method On chopped glass fibers (0.2 mm in length), dry the glass fibers sprayed with coupling agent solution in an oven at 120°C for 30 minutes;
[0037] (3) Send the mixture in the above (1) into the twin-screw extruder through the upstream feeding port, and at the same time, send 10 parts of glass fibers in the above (2) into the twin-screw extruder through the downstream feeding port for melting For extrusion and granulation, the temperature of each section of the extruder is: 220°C in the first zone, 235°C in the second zone, 245°C in the third...
Embodiment 2
[0040] (1) First dry nylon 6 in an oven at 100°C for 8 hours, take 100 parts of dried nylon 6, 0.2 parts of antioxidant 168 and 0.3 parts of lubricant TAF (modified ethylene bis fatty acid amide, Suzhou Xingtai Photochemical Auxiliary Co., Ltd.) mixed in a high-speed mixer for 4 minutes;
[0041] (2) Dissolve 0.1 part of coupling agent 3-glycidyl etheroxypropyl trimethoxysilane (KH560) in absolute ethanol to prepare a coupling agent-ethanol solution with a concentration of 1.0%, and spray it to The solution is sprayed on the chopped glass fiber (0.6mm in length), and the glass fiber sprayed with the coupling agent solution is dried in an oven at 110°C for 45 minutes;
[0042] (3) Send the mixture in (1) above into the twin-screw extruder through the upstream feeding port, and at the same time, feed 20 parts of glass fibers in the above (2) into the twin-screw extruder through the downstream feeding port for melting For extrusion and granulation, the temperature of each sectio...
Embodiment 3
[0045] (1) First dry nylon 6 in an oven at 110°C for 6 hours, take 100 parts of dried PET, 0.25 parts of antioxidant 1076 and 0.4 parts of lubricant RH-313A (Dongguan Jianxing Plastic Products Co., Ltd.) at high speed Mix in a mixer for 5 minutes;
[0046] (2) Dissolve 0.125 parts of coupling agent 3-(methacryloyloxy)propyltrimethoxysilane (KH570) in absolute ethanol to prepare a coupling agent-ethanol solution with a concentration of 1.25%, and use the spray method Spray the solution on the chopped glass fiber (1.0 mm in length), and dry the glass fiber sprayed with the coupling agent solution in an oven at 100°C for 60 minutes;
[0047] (3) Send the mixture in (1) above into the twin-screw extruder through the upstream feeding port, and at the same time, feed 25 parts of glass fibers in the above (2) into the twin-screw extruder through the downstream feeding port for melting For extrusion and granulation, the temperature of each section of the extruder is: 220°C in the fir...
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