Reinforced toughened self-lubricating polyformaldehyde composite material and preparation method thereof
A composite material and polyoxymethylene technology, which is applied in the field of reinforcing and toughening self-lubricating polyoxymethylene composite materials and their preparation, can solve problems such as the reduction of tensile strength, and achieve the effects of good wear resistance, uniform dispersion and good processing and forming performance.
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[0038] Example 1
[0039] (1) Dry 10% TPEE (hard segment is polybutylene terephthalate, soft segment is tetrahydrofuran polyether) at 100°C for 2-4 hours;
[0040] (2) Add the dried TPEE to the high-speed mixer, add 70% homopolymer POM, 4% polytetrafluoroethylene, 5% glass fiber, 0.6% antioxidant, 0.8% formaldehyde absorbent, 0.4% surface lubrication Mixing agent, 0.2% coupling agent and 1% compatibilizer at room temperature for 15-20min;
[0041] (3) The mixture obtained in step (2) is added to the extruder, 8% zinc oxide whiskers are added from the vent hole on the twin-screw extruder, and the mixture is extruded and pelletized and injection molded.
[0042] The temperature of each zone of the extruder is: 140℃, 160~170℃, 170~185℃, 180~195℃, 180~195℃, 180~195℃, die temperature 185~195℃, screw speed 200-500 rpm / minute. After the produced particles are dried at 100°C for 3 hours, they are injection molded with an injection molding machine with a barrel temperature of 160-200°C and ...
Example Embodiment
[0043] Example 2
[0044] (1) Dry 20% TPEE (hard segment is polybutylene terephthalate, soft segment is tetrahydrofuran polyether) at 100°C for 2-4 hours;
[0045] (2) Add the dried TPEE to the high-speed mixer, add 55% homopolymer POM, 5% polytetrafluoroethylene, 15% glass fiber, 0.6% antioxidant, 0.6% formaldehyde absorbent, 0.4% surface lubrication Mixing agent, 0.1% coupling agent and 2% compatibilizer at room temperature for 15-20min;
[0046] (3) The mixture obtained in step (2) is added to the extruder, and 1.3% zinc oxide whiskers are added from the vent hole on the twin-screw extruder, extruded and pelletized, and injection molded.
[0047] The temperature of each zone of the extruder is: 140~150℃, 160~170℃, 170~185℃, 180~195℃, 180~195℃, 180~195℃, die temperature 185~195℃, screw speed 200- 500 revolutions per minute. After the produced particles are dried at 100°C for 3 hours, they are injection molded with an injection molding machine with a barrel temperature of 160-200°C...
Example Embodiment
[0048] Example 3
[0049] (1) Dry 30% TPEE (hard segment is polybutylene terephthalate, soft segment is tetrahydrofuran polyether) at 100℃ for 2-4h;
[0050] (2) Add the dried TPEE to the high-speed mixer, add 45% homopolymer POM, 6% polytetrafluoroethylene, 10% glass fiber, 0.6% antioxidant, 0.5% formaldehyde absorbent, 0.4% surface lubrication Mixing agent, 0.2% coupling agent and 2% compatibilizer at room temperature for 15-20min;
[0051] (3) The mixture obtained in step (2) is added to the extruder, 5.3% zinc oxide whiskers are added from the vent hole on the twin-screw extruder, extruded and pelletized, and injection molded.
[0052] The temperature of each zone of the extruder is: 140~150℃, 160~170℃, 170~185℃, 180~195℃, 180~195℃, 180~195℃, die temperature 185~195℃, screw speed 200- 500 revolutions per minute. After the produced particles are dried at 100°C for 3 hours, they are injection molded with an injection molding machine with a barrel temperature of 160-200°C and a mol...
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