Method for synergistically modifying polytetrafluoroethylene wear-resistant material by using multi-scale organic/inorganic filler
A technology of polytetrafluoroethylene and inorganic filler, which is applied in the fields of lubricating materials and composite materials, can solve the problem of undiscovered wear resistance of polytetrafluoroethylene, and achieve the effect of improving comprehensive performance and improving wear resistance.
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Embodiment 1
[0022] Raw material ratio: polytetrafluoroethylene 94.5 g, polyamide imide 5 g, nano oxide 0.5 g.
[0023] Preparation Process:
[0024] (1) Low temperature freezing mix screen: Plurifluoride, polyamide imide, nano oxide is placed in a low temperature freezing mixing body, and the mixing chamber temperature is adjusted to -10 ° C, stirring speed 650 r / min, stir Mix for 10 min, mixed with uniform oscillation, dry, dry, resulting in a uniform mixture;
[0025] (2) Dry: Put the mixture into the oven, temperature 100 ° C, dry time 8 h;
[0026] (3) Pressure molding: Put the dry mixture into the metal mold, is placed horizontally on the hydraulic press, suppressed 10 minutes, released to the preformed blank under pressure of 35 MPa; add the preformed blank into flexible silicone rubber In the set, it is pressed into the cold and dispersion machine to obtain a static pressure blank of the cold and disasters; the static pressure molding conditions of cold and other: medium: water; pres...
Embodiment 2
[0030] Raw material ratio: polytetrafluoroethylene 94 g, polyamideimide 5g, nano oxide 1g.
[0031] Preparation Process:
[0032] (1) Low temperature freezing mix screen: Pluriflufluoroethylene, polyamideimide, nano oxide is placed in a low temperature freezing mixing part, and the mixing chamber temperature is adjusted to -5 ° C, stirring speed 1300R / min, stir Mix 15min, mixed with uniform oscillation, dry, dry, resulting in a uniform mixture;
[0033] (2) Drying: Put the mixture into the oven, temperature 110 ° C, dry time 6 h;
[0034] (3) Pressure molding: Put the dry mixture into the metal mold, placed horizontally on the hydraulic press, pressed for 5 minutes under pressure of 50 MPa, and the preformed blank is obtained after being released; the preformed blank is placed in a flexible silicone rubber. In the set, it is pressed in the cold and dispersion machine to obtain a static pressure blank of the cold and equal; cold and medium static pressure molding conditions: medi...
Embodiment 3
[0038] Raw material ratio: polytetrafluoroethylene 89g, polyamide imide 10g, nano oxide 1g.
[0039] Preparation Process:
[0040] (1) Low temperature freezing mix screen: Polytetrafluoroethylene, polyamide imide, nano oxide is placed in a low temperature freezing mixture, and the mixing chamber temperature is adjusted to -8 ° C, stirring speed 1300R / min, stir Mix for 20 min; mixed and uniformly oscilled, dried, and even uniform mixture;
[0041] (2) Dry: Put the mixture into the oven, temperature 105 ° C, dry time 7 h;
[0042](3) Pressure molding: Put the dry mixture into the metal mold, is placed horizontally on the hydraulic press, suppressed for 10 minutes under pressure of 45 MPa, and the preformed blank is obtained after being released; the preform is placed in a flexible silicone rubber. In the set, it is pressed into the cold and dispersion machine to obtain a static pressure blank of the cold. Cold and other static pressure molding conditions: Media: water; pressure: 5...
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Abstract
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