Natural fiber filled polyethylene composite material and preparation method thereof
A technology of natural fibers and composite materials, applied in the field of polymer composite material preparation, can solve problems such as poor mechanical properties, and achieve the effects of excellent mechanical properties, good adjustability and good processing performance.
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[0038] The present invention also provides a method for preparing natural fiber-filled polyethylene composite material. The method includes the following steps:
[0039] Step 1: Measure the weight of the natural fiber powder and put it into a high-speed mixer, stir at 2000r / min for 20-30 minutes;
[0040] Step 2: Add other ingredients in proportion, mix and stir for 10-20 minutes, and then put them into the co-rotating parallel twin-screw extruder;
[0041] Step 3: Pelletizing and extruding from the co-rotating parallel twin-screw extruder to obtain a natural fiber-filled polyethylene composite material.
[0042] The material obtained in step 3 is pellets.
[0043] The range of the stirring temperature T1 in the step 1 is: 100°C≤T1≤120°C.
[0044] The range of the granulation temperature T2 in the step 3 is: 160°C≤T2≤180°C.
Example Embodiment
[0045] Example one:
[0046] Step 1: Perform measurement, put the measured natural natural fiber powder and wood powder (80 mesh) into the high-speed mixer, heat to 100-120°C, and stir at 2000r / min for 20-30 minutes;
[0047] Step 2: Add high-density high-density polyethylene (MI=3), calcium carbonate, and stearic acid-PEI condensate in proportion Zinc stearate and EBSwax, the preferred dosages are respectively 30% by weight, 6% by weight, 1.5% by weight, 1.5% by weight and 1% by weight, both are mixed and stirred for 10-20 minutes, and then mixed The finished product after mixing is put into the same direction parallel twin-screw extruder;
[0048] Step 3: Perform granulation. At this time, the required temperature is 160-180°C. Under this temperature condition, the natural fiber-filled polyethylene composite material is obtained.
[0049] The pellets obtained in the step 3 are extruded by a conical screw, and can be made into profiles of various shapes.
Example Embodiment
[0050] Embodiment two:
[0051] Step 1: Perform measurement, put the measured natural natural fiber powder and bamboo powder (100 mesh) into the high-speed mixer, and heat to 100-120°C and stir at 2000r / min for 20-30 minutes;
[0052] Step 2: Add high-density high-density polyethylene (MI=5), talc, and lauric acid-PEI condensate in proportion Zinc stearate and EBSwax, the preferred dosages are 25% by weight, 5% by weight, 2.5% by weight, 1.5% by weight, and 1% by weight, both of which are mixed and stirred for 10-20 minutes. The finished product after mixing is put into the same direction parallel twin-screw extruder;
[0053] Step 3: Perform granulation. At this time, the required temperature is 160-180°C. Under this temperature condition, the natural fiber-filled polyethylene composite material is obtained.
[0054] The pellets obtained in the step 3 are extruded by a conical screw, and can be made into profiles of various shapes.
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