Poly(ether-ether-ketone) composite material, production method and application of sealing member

A technology of polyether ether ketone and composite materials, which is applied to parts in contact between valve components and valve seats, mechanical equipment, engine components, etc., can solve problems such as poor hydrolysis resistance, easy breakage, leakage, etc., and achieve improved mechanical properties , Good hydrolysis resistance, cost reduction effect

Active Publication Date: 2008-07-16
NANJING COMPTECH COMPOSITES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantages and disadvantages are obvious: polytetrafluoroethylene material has good corrosion resistance, small friction coefficient, and small torque to the valve, but it is resistant to temperature difference, long-term use temperature is ≤200 ℃, and it is easy to creep and cause leakage; graphite material is resistant to high temperature , light specific gravity, but not pressure-resistant, easy to break and cause leakage; nylon material has good compression resistance and hardness, and the price is relatively cheap, but its corrosion resistance is far inferior to that of PTFE, and its temperature resistance is relatively lower than that of PTFE; carbon fiber/glass Fiber-filled PTFE composite material has improved pressure resistance, wear resistance and temperature resistance compared with pure PTFE material, but because 70 parts of the resin base materi

Method used

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  • Poly(ether-ether-ketone) composite material, production method and application of sealing member

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1: Make 30 seals with a size of 195 / Φ145×17, with a total amount of 10kg.

[0027] 1. Raw material formula:

[0028] PEEK Powder 7.5kg

[0029] Nanoparticles 1kg

[0030] Polyfluoroethylene propylene or polyphenylene sulfide 0.5kg

[0031] Glass fiber 1kg (fiber diameter 6~12um, aspect ratio 3:1~11:1)

[0032] 2. Mixing: Use a high-speed mixer to mix, the mixing speed is 2000 rpm, and the mixing time is 2 minutes.

[0033] 3. Press and form under the above conditions, sinter with gas heat transfer sintering method, the highest sintering temperature is 380±10°C, keep warm for 3 hours, and the heating and cooling speed is 50-80°C / H.

[0034] 4. Secondary annealing treatment to eliminate stress and deformation of the material, the temperature is 200°C±20°C, and the time is 2 hours.

[0035] 5. Machining is carried out after measuring the size.

Example Embodiment

[0036] Embodiment 2: The product can be made completely by adding carbon fiber up to 2kg, and the performance reaches and exceeds the performance of the above-mentioned embodiment.

Example Embodiment

[0037] Embodiment 3: It is better to use metal skeleton material for the sealing member, which can save the composite material of the present invention. cut costs.

[0038] Method embodiment, (1) compression molding:

[0039] 1. Ingredients: 65-90 parts of polyetheretherketone, 10-30 parts of glass fiber, 2-10 parts of polytetrafluoroethylene, 5-10 parts of molybdenum disulfide, and 10-30 parts of carbon fiber. The above ratios are weight ratios.

[0040] 2. Mix the materials. According to the design requirements, pour the prepared materials into the automatic mixer for mixing and mixing. The mixing time is 0.5 to 1 minute, and the speed of the mixer is 2000 rpm.

[0041] 3. Pressing, put the mixed raw powder into the mold cavity, pressurize at a speed of 20MPa / min at a room temperature of 20±5°C, and the gauge pressure reaches 50MPa / cm 2 , start to deflate gradually, and then keep the pressure for 6 minutes, and the preform is formed.

[0042] 4. Put the pressed preform i...

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Abstract

The invention relates to a polyether-ether-ketone composite material which consists of polyether-ether-ketone, nanoparticles, filling materials and addition agent materials. The composite material comprises 75 to 95 portions of polyether-ether-ketone powders, 5 to 10 portions of the nanoparticles, 10 to 20 portions of the filling materials and 2 to 5 portions of the additive agents by weight. The filling materials are glass fiber, carbon fiber, quartz powder and MoS2 or toner. A method of compression moulding forming adopted is that: materials is prepared according to the formula; materials are mixed: the materials prepared according to designed requirements poured into an automatic material mixing machine for evenly mixing, the mixing time is between 0.5 minute and 3 minutes, then compressing process is carried out, and the blended mixture is sent to a mould cavity for moulding. The material can be used for sealing materials products. Various valve sealing elements produced by the invention has properties of creep resisting, corrosion resistance, heat resistance and pressurization, etc.; the ability of pressurization and wear resistance of the material are improved, and at the same time the cost is lowered by 10 to 20 percent or even higher, thus being beneficial to using and promotion of the materials.

Description

technical field [0001] The invention relates to a polyether ether ketone composite material, application and preparation method of a seal, in particular to a nano-material reinforced modified polyether ether ketone seal (KT-PEEK) and a preparation method, belonging to the field of sealing material products. Background technique [0002] Polyetheretherketone (PEEK) resin is a special engineering plastic with excellent performance. Compared with other special engineering plastics, it has many significant advantages, such as: high temperature resistance, excellent mechanical properties, good self-lubrication, chemical corrosion resistance, Flame retardancy, peel resistance, radiation resistance, stable insulation, hydrolysis resistance and easy processing, etc., are widely used in aerospace, automobile manufacturing, electrical and electronic, medical and food processing and other fields. [0003] Polyetheretherketone (PEEK) resin has excellent performance and is widely used. P...

Claims

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Application Information

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IPC IPC(8): C08L61/16C08K3/00B29C43/02B29C43/58B29C45/78B29C71/02B29B7/00B29B13/06F16K25/00
Inventor 杨文光
Owner NANJING COMPTECH COMPOSITES CORP
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