High-temperature creep-resistant, low-wear injection moldable fluorine-containing thermoplastic sealing material and preparation method of low-leakage sealing ring
A sealing material and low-wear technology, which is applied in the field of preparation of fluorine-containing thermoplastic sealing materials and low-leakage sealing rings, can solve problems such as lack of, difficult to solve polymer fusion, and difficulty in ensuring material uniformity and compatibility. Reduced leakage, good high temperature creep resistance, low wear effect
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[0031] Correspondingly, a method for preparing a high-temperature creep-resistant, low-wear injection moldable fluorine-containing thermoplastic sealing material, the steps of which are as follows:
[0032] Dry and mix the raw materials; put them in an extruder to melt, extrude and granulate.
[0033] Preferably, the preparation method is:
[0034] (1) Dry perfluorothermoplastic resin, polyether ether ketone, carbon fiber, and PTFE micropowder separately at 105-120°C for 3-6 hours;
[0035] (2) Put the perfluorothermoplastic resin, polyether ether ketone, carbon fiber, and PTFE micropowder materials dried in step (1) into a high-speed mixer and mix them evenly together with the compatibilizer and rare earth modifier in proportion;
[0036] (3) Put the raw materials mixed in the previous step into a twin-screw extruder to melt, extrude and granulate;
[0037] Among them, the temperature of each section of the barrel of the twin-screw extruder is kept between 330°C and 360°C, ...
Embodiment 1
[0052] According to the formula, 98% perfluorinated thermoplastic resin, 1% polyether ether ketone, 0.5% carbon fiber, and 0.2% PTFE micropowder were placed in an electric oven at a temperature of 110°C. After 3 hours of constant temperature, cooled to room temperature, and then The above materials, 0.2% of γ-chloropropyltrimethoxysilane, and 0.1% of the rare earth modifier samarium oxide were put into a high-speed mixer at a speed of 2000 rpm for 1 minute to obtain a mixture. The above mixture is melt-extruded and granulated through a twin-screw extruder. The mixture is melt-extruded and granulated by a twin-screw extruder to obtain fluorine-containing thermoplastic material particles, and a high-temperature creep-resistant and low-wear sealing ring sample is prepared by injection processing.
Embodiment 2
[0054] According to the requirements of the formula, 60% perfluorothermoplastic resin, 20% polyetheretherketone, 10% carbon fiber, and 5% PTFE micropowder were placed in an electric oven at a temperature of 105°C. After 3 hours of constant temperature, cooled to room temperature, and then Put the above materials, 1% of γ-chloropropyltrimethoxysilane, and 4% of the rare earth modifier samarium oxide into a high-speed mixer at a speed of 3000 rpm for 2 minutes to obtain a mixture. The above mixture is melt-extruded and granulated through a twin-screw extruder. The mixture is melt-extruded and granulated by a twin-screw extruder to obtain fluorine-containing thermoplastic material particles, and a high-temperature creep-resistant and low-wear sealing ring sample is prepared by injection processing.
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