Regeneration method of waste polyethylene
A technology of waste polyethylene and recycled polyethylene, which is applied in applications, household appliances, and other household appliances, can solve the problems of poor performance of recycled polyethylene, limited usage and range of use, and avoid performance degradation and save energy. Manpower and material resources, the effect of saving resources
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Embodiment 1
[0026] A melt flow rate meter was used to measure the melt flow rate of the waste polyethylene, and the melt flow rate of the waste polyethylene used in this example was 0.18 g / 10 min.
[0027]Calcium carbonate is placed in the high-speed mixer, and under the state of 1250r / min, the acetone solution containing 10wt% stearate is added dropwise in the high-speed mixer, and then mixed for 10min in the mixer of 2500r / min at 80°C, The modified calcium carbonate is placed in an oven at 60° C. until constant weight to obtain surface-modified calcium carbonate, and the mass ratio of calcium carbonate to stearic acid is 100:1.
[0028] Formula: DCP: 1.44g; above-mentioned surface modified calcium carbonate: 16g; waste polyethylene: 782.56g,
[0029] 2wt% surface-modified calcium carbonate, 0.18wt% DCP, and 97.82wt% waste polyethylene were mixed in a high-speed mixer at 2500r / min at 50°C for 5 minutes, and then cross-linked in a twin-screw extruder at 180-195°C , in-situ dispersion to ...
Embodiment 2
[0032] A melt flow rate meter was used to measure the melt flow rate of the waste polyethylene, and the melt flow rate of the waste polyethylene used in this example was 2 g / 10 min.
[0033] Put the wollastonite in the high-speed mixer, and add the dichloromethane solution containing 15wt% titanate coupling agent NDZ105 dropwise into the high-speed mixer at 1300r / min, and then 2700r / min at 80°C The modified wollastonite was mixed in a mixer for 13 minutes, and the modified wollastonite was placed in an oven at 70° C. until constant weight to obtain surface-modified wollastonite. The mass ratio of wollastonite to titanate coupling agent NDZ105 is 100:2.
[0034] Formula: DCP: 1.44g; above surface modified wollastonite: 16g; waste polyethylene: 782.56g
[0035] 2wt% surface-modified wollastonite, 0.18wt% DCP, and 97.82wt% waste polyethylene were mixed in a high-speed mixer at 2750r / min at 60°C for 8 minutes, and then extruded in a twin-screw extruder at 180-195°C. Combined and...
Embodiment 3
[0038] A melt flow rate meter was used to measure the melt flow rate of the waste polyethylene, and the melt flow rate of the waste polyethylene used in this example was 0.50 g / 10 min.
[0039] Formula: DCP: 4g; polymer grade nano-montmorillonite DK1 (produced by Zhejiang Fenghong Clay Chemical Co., Ltd.): 4g; waste polyethylene: 792g
[0040] 0.5wt% polymer-grade nano-montmorillonite, 0.5wt% DCP, and 99wt% waste polyethylene were mixed in a high-speed mixer at 2250r / min at 30°C for 3 minutes, and then mixed in a twin-screw extruder at 180-195°C Cross-linking and in-situ dispersion to obtain regenerated polyethylene. The regenerated polyethylene melt enters the head of the extruder at 165°C matching the 160mm pipe through a 70rad / min metering melt pump, and is cooled and shaped at 60-80°C to obtain Polyethylene pipe with an outer diameter of 160mm.
[0041] The properties of the polyethylene pipe prepared above: oxidation induction period (200°C) ≥ 38min, elongation at break ...
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