A method for continuous preparation of high-performance plasticized rubber powder by double-stage low-shear co-rotating twin-screws
A twin-screw, low-shear technology, used in plastic recycling, recycling technology, etc., can solve problems such as uneven heat transfer and damage
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Embodiment 1
[0016] Example 1: 100 parts of 20-mesh waste load-carrying carcass rubber powder, 14 parts of aromatic oil, 5 parts of tall oil as softener, 0.2 part of 2,2'-bis(6-tert-butyl-p-phenol) disulfide As an activator, the mixing process is as follows: aromatic oil and tall oil are mixed and preheated in an oil tank at 100°C, and 2,2'-bis(6-tert-butyl-p-phenol) disulfide is put into the oil tank and stirred and mixed for 7 minutes , put the mixture of the three into an airtight mixer mixed with rubber powder according to the ratio of parts by mass, set the discharge temperature at 110°C, and send it into a partially meshed co-rotating twin-screw extruder (D=50mm, L / D =10, H=8mm, C L =38mm, 8 heating sections, among which the first and second zones are the exhaust conveying section, and the third to eighth zones are the plasticizing section), the temperature of each heating zone is set to 140°C, 180°C, 220°C respectively , 240°C, 240°C, 220°C, 180°C, 140°C, the rotational speed of th...
Embodiment 2
[0018] Embodiment 2: Adopt 100 parts of 30 purpose waste radial tire tread rubber powders, 16 parts of aromatic hydrocarbon oil, 4 parts of pine tar are softening agent, 0.4 part of diallyl disulfide is activator, mixing process is as follows: aromatic hydrocarbon oil Stir and mix with pine tar in an oil tank at 120°C for preheating, put diallyl disulfide into the oil tank and stir and mix for 7 minutes, put the mixture of the three into a closed mixer mixed with rubber powder according to the ratio of mass and number of parts, and discharge The material temperature is set at 105°C, and it is fed into a partially intermeshed co-rotating twin-screw extruder (D=50mm, L / D=10, H=8mm, C L =38mm, 8 heating sections, among which the first and second zones are the exhaust conveying section, and the third to eighth zones are the plasticizing section), the temperature of each heating zone is set to 140°C, 180°C, 220°C respectively , 235°C, 235°C, 220°C, 180°C, 140°C), the rotational spe...
Embodiment 3
[0020] Embodiment 3: Adopt 100 parts of 60 purpose waste radial tire tread rubber powders, 16 parts of aromatic hydrocarbon oils, 2 parts of rosin are softening agent, 0.5 part of diallyl disulfide is activator, mixing process is as follows: aromatic hydrocarbon oil and Stir rosin in an oil tank at 130°C to preheat, put diallyl disulfide into the oil tank and stir for 10 minutes, and put the mixture of the three into a closed mixer mixed with rubber powder according to the ratio of parts by mass. Set at 110°C, feed it into a partially intermeshed co-rotating twin-screw extruder (D=300mm, L / D=20, H=30mm, C L =255mm, 8 heating sections, among which the first and second zones are the exhaust conveying section, and the third to eighth zones are the plasticizing section), the temperature of each heating zone is set to 150°C, 190°C, 230°C respectively , 250°C, 250°C, 230°C, 180°C, 140°C, the rotational speed of the first-stage plasticizing screw is 56r / min, and the plasticizing time...
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Abstract
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