HDPE reclaimed material, preparation method thereof and HDPE pipe
A technology of recycled materials and pipes, which is applied in the field of its preparation, HDPE recycled materials, and HDPE pipes, can solve the problems of high impact strength and low flexural modulus of HDPE recycled materials.
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[0025] The invention provides a kind of preparation method of HDPE recycled material, comprises the following steps:
[0026] A) crushing the extrusion-grade HDPE recycled material to obtain the crushed material;
[0027] B) mixing the crushed material, crosslinking agent and inorganic filler, extruding and granulating to obtain HDPE recycled material;
[0028] In the extrusion-grade HDPE recycled material, the content of HDPE is >90wt%;
[0029] The crosslinking agent is an aromatic crosslinking agent and / or an aliphatic crosslinking agent;
[0030] The mass ratio of the broken material, the crosslinking agent and the inorganic filler is 100:(0.01-0.05):(0.2-2.0).
[0031] In the present invention, the extrusion-grade HDPE recycled material is preferably sorted and cleaned, crushed, rinsed, dehydrated and dried to obtain HDPE broken material.
[0032] In the present invention, the extrusion-grade HDPE recycled material contains a certain amount of impurities, wherein the H...
Embodiment 1
[0049] (1) Wash the polyethylene small hollow material with water and a cleaning agent, dehydrate and dry it, and then crush it into materials of similar size to obtain a polyethylene crushed material with a particle size of 6 mm to 20 mm; after testing the melt flow index of the polyethylene crushed material It is 2g / 10min.
[0050] (2) Fully stir 0.5 parts by weight of glycidyl methacrylate and 3 parts by weight of talcum powder in a high-speed mixer for 40s, and the speed of the high-speed mixer is 35HZ; add 100 parts by weight of polyethylene obtained in step (1) The crushed material was continuously stirred for 20 seconds to obtain a mixed material.
[0051] (3) The mixture obtained in step (2) was extruded and granulated in a twin-screw extruder at a temperature of 200° C. and a screw speed of 300 rpm to obtain a special material for pipes.
Embodiment 2
[0053] (1) Wash the polyethylene small hollow material with water and a cleaning agent, dehydrate and dry it, and then crush it into materials of similar size to obtain a polyethylene crushed material with a particle size of 6 mm to 20 mm; after testing the melt flow index of the polyethylene crushed material It is 2g / 10min.
[0054] (2) the triallyl cyanurate (TAIC) of 0.1 weight part and the calcium carbonate of 0.3 weight part are fully stirred 40s in high-speed mixer, and the rotating speed of described high-speed mixer is 35HZ; Add 100 weight part steps (1 ) The polyethylene crushed material obtained continues to stir for 20 s to obtain a mixed material.
[0055] (3) The mixture obtained in step (2) was extruded and granulated in a twin-screw extruder at a temperature of 200° C. and a screw speed of 300 rpm to obtain a special material for pipes.
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