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A polyether ether ketone sealing material and preparation method thereof

A polyether ether ketone and sealing material technology, applied in the field of polyether ether ketone sealing material and its preparation, can solve the problems of being difficult to meet use requirements, difficult to achieve low friction, high wear resistance and good resilience, etc.

Active Publication Date: 2020-09-01
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a single PEEK resin is used as a sealing material in complex working conditions, it is difficult to meet the requirements of use, and it is difficult to achieve the compatibility of low friction, high wear resistance and good resilience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The present invention also provides a preparation method of the polyether ether ketone sealing material described in the above technical solution, comprising the following steps:

[0038] Ultrasonic stirring of nano-silica and alcohol, then sequentially adding polyetheretherketone, polytetrafluoroethylene, polyimide and carbon black, and then suction filtration and drying to obtain powder;

[0039] The powder is hot-pressed to obtain the polyether ether ketone sealing material.

[0040] In the present invention, nano-silica and alcohol are ultrasonically stirred, then polyetheretherketone, polytetrafluoroethylene, polyimide and carbon black are added in sequence, and then suction-filtered and dried to obtain powder. In the present invention, the mass ratio of nano silicon dioxide to alcohol is preferably 1:70-100, more preferably 1:90. The present invention has no special limitation on the specific method of the ultrasonic stirring, as long as the nano silicon dioxide ...

Embodiment 1

[0047] (1) Weigh 70% polyether ether ketone (particle size is 50 μm), 10% polytetrafluoroethylene (particle size is 20 μm), 10% polyimide (particle size is 50 μm), 5% carbon black (particle size is 50 μm), 5% nano silicon dioxide (particle size is 50nm);

[0048] (2) Using wet mixing method, adding nano-silica to industrial alcohol (mass ratio 1:70), stirring ultrasonically for 0.5 hours, and then adding the weighed polyether ether ketone, polytetrafluoroethylene, polyimide Amine and carbon black, mixed thoroughly, then dried by suction filtration;

[0049](3) Pour the mixture into the mold, adopt the hot pressing molding process, the molding temperature is 380°C, the pressure is 40MPa, heat preservation and pressure keeping for 100 minutes, and then cool naturally. After hot pressing, it is naturally cooled to obtain a strong and integrated polyether ether ketone sealing material.

[0050] (4) The properties of the polyetheretherketone sealing material obtained in this embo...

Embodiment 2

[0052] (1) Weigh 80% polyether ether ketone (particle size is 75 μm), 3% polytetrafluoroethylene (particle size is 30 μm), 10% polyimide (particle size is 75 μm), 5% carbon black (particle size is 100 μm), 2% nano silicon dioxide (particle size is 100nm);

[0053] (2) Using wet mixing method, adding nano-silica to industrial alcohol (mass ratio 1:90), ultrasonic stirring for 1 hour, and then adding the weighed polyether ether ketone, polytetrafluoroethylene, polyimide Amine and carbon black, mixed thoroughly, then dried by suction filtration;

[0054] (3) Pour the mixed material into the mold, adopt the hot pressing molding process, the molding temperature is 390°C, the pressure is 30MPa, heat preservation and pressure holding for 80 minutes, and natural cooling. After hot pressing, it is naturally cooled to obtain a strong and integrated polyether ether ketone sealing material.

[0055] (4) The properties of the polyetheretherketone sealing material obtained in this embodim...

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Abstract

The invention provides a polyether-ether-ketone sealing material and belongs to the field of sealing materials. In the sealing material, polyether-ether-ketone serves as a resin matrix, is resistant to high temperature and high in size stability and has excellent mechanical performance; polyimide an polyether-ether-ketone are high in compatibility, so that viscosity and forming temperature of thesealing material can be lowered effectively, and toughness of the sealing material is improved; polytef is high in thermal stability and chemical stability and excellent in antifriction performance; carbon black can remarkably improve surface hardness and aging resistance of the material; nano silicon dioxide can remarkably improve wear resistance of the polyether-ether-ketone and has synergisticeffect with polytef and carbon black, so that time for friction reaching a stable state is shortened effectively.

Description

technical field [0001] The invention relates to the technical field of sealing materials, in particular to a polyether ether ketone sealing material and a preparation method thereof. Background technique [0002] Polyetheretherketone (PEEK for short) is a new type of semi-crystalline aromatic plastic engineering plastic with excellent physical and mechanical properties. It can replace traditional materials such as metals and ceramics in many special fields. It has made outstanding contributions to improving performance and has become one of the most popular high-performance engineering plastics today. The strong and tough integrated polyether ether ketone sealing material can be used in compressor plates, valve linings, valve seats, sealing rings, thrust washers, bearings, bearing cages, stoppers, etc. Return valves, transmission valves, electric motor thrust washers, engine seals, transmission thrust washers, transmission gaskets, etc. [0003] In terms of mechanical prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/16C08L27/18C08L79/08C08K3/04C08K3/36
Inventor 张新瑞王齐华王廷梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI