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

A polyether ether ketone and composite material technology, which is applied in the parts, mechanical equipment, engine components, etc. in contact between the valve element and the valve seat, can solve the problems of poor hydrolysis resistance, easy breakage, leakage, etc. , good hydrolysis resistance, cost reduction effect

Active Publication Date: 2010-08-11
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 material of this material is still fluororesin, its temperature can only be ≤ 250 ℃ work, long-term use temperature ≤ 200 ℃, and poor hydrolysis resistance; metal materials, such as stainless steel, temperature resistance, pressure resistance, corrosion resistance are better, but the friction coefficient is large, the specific gravity is large, the elasticity cannot be restored, and the sealing effect is not good
[0006] The performance of polyetheretherketone is good, but its cost is high. Therefore, under the premise of maintaining the excellent performance of polyetheretherketone with corrosion resistance, temperature resistance and pressure resistance, it is necessary to further improve the mechanical properties, improve the pressure resistance and wear resistance. strength, while reducing the cost of PEEK composites and the preparation process has not been proposed

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0027] 1. Raw material formula:

[0028] Polyetheretherketone powder 7.5kg

[0029] Nano particles 1kg

[0030] Polyperfluoroethylene propylene or polyphenylene sulfide 0.5kg

[0031] Glass fiber 1kg (fiber diameter is 6~12um, the ratio of length to diameter is 3:1~11:1)

[0032] 2. Mixing: It is mixed with a high-speed mixer, the mixing speed is 2000 rpm, and the mixing time is 2 minutes.

[0033] 3. Compression molding under the above conditions, sintering by gas heat-carrying sintering method, the highest sintering temperature is 380±10℃, the temperature is kept for 3 hours, and the temperature rise and fall speed is 50~80℃ / H.

[0034] 4. Secondary annealing treatment to eliminate material stress and deformation, temperature 200℃±20℃, time 2 hours.

[0035] 5. After checking the size, perform machining.

Embodiment 2

[0036] Example 2: Using carbon fiber to add up to 2kg can completely make a product, and meet and exceed the performance of the above example.

Embodiment 3

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

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

[0039] 1. Ingredients: 65 to 90 parts of polyether ether ketone, 10 to 30 parts of glass fiber, 2 to 10 parts of polytetrafluoroethylene, 5 to 10 parts of molybdenum disulfide, and 10 to 30 parts of carbon fiber. The above ratio is weight ratio.

[0040] 2. Mixing. 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. Press, add the mixed raw powder into the mold cavity, press at a speed of 20MPa / min at a room temperature of 20±5℃, the gauge pressure reaches 50MPa / cm 2 , Begin to deflate gradually, and then keep the pressure for 6 minutes to form the preform.

[0042] 4. Put the pressed preform into a special sintering furnace, and sin...

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PUM

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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. Thefilling 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, a sealing element application and a preparation method, in particular to a nano material reinforced modified polyether ether ketone sealing element (KT-PEEK) and a preparation method, belonging to the field of sealing material products. Background technique [0002] Polyether ether ketone (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 resistance, Flame retardant, peeling resistance, radiation resistance, stable insulation, hydrolysis resistance and easy processing, etc., are widely used in aerospace, automobile manufacturing, electronic and electrical, medical and food processing fields. [0003] Polyetheretherketone (PEEK) resin has excellent properties and is widely used. PEEK...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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