CN102634147B - Polyvinylidene fluoride based composite frictional material for traveling wave type revolving ultrasonic motor and preparation method thereof - Google Patents
Polyvinylidene fluoride based composite frictional material for traveling wave type revolving ultrasonic motor and preparation method thereof Download PDFInfo
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- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 75
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 title abstract description 29
- 239000002033 PVDF binder Substances 0.000 title abstract 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 230000003750 conditioning effect Effects 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000002783 friction material Substances 0.000 claims description 34
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 13
- 239000004917 carbon fiber Substances 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 239000007822 coupling agent Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 239000008188 pellet Substances 0.000 claims description 8
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000012763 reinforcing filler Substances 0.000 claims description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 4
- 229920013649 Paracril Polymers 0.000 claims description 2
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 239000002041 carbon nanotube Substances 0.000 claims description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 2
- 229960004643 cupric oxide Drugs 0.000 claims description 2
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 2
- 235000015320 potassium carbonate Nutrition 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 238000002604 ultrasonography Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 230000003245 working effect Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 229920006389 polyphenyl polymer Polymers 0.000 description 3
- 229910000077 silane Inorganic materials 0.000 description 3
- 206010020843 Hyperthermia Diseases 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 230000036031 hyperthermia Effects 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
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- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to a polyvinylidene fluoride based composite frictional material for a traveling wave type revolving ultrasonic motor and a preparation method thereof. The frictional material comprises the following compositions in parts by weight: 100 parts of polyvinylidene fluoride, 0-30 parts of reinforced fibers, 0-30 parts of reinforced filler and 0-50 parts of friction and heat-conducting property conditioning agent. The the preparation method comprises the steps of: premixing the compositions weighed in a proportion for 20 minutes in a ball mill; mixing for 3-5 hours by adopting an ethanol wet method; drying at temperature of 80 DEG C; adding granules into a mold cavity, and conducting hydraulic forming under the conditions that pressure is 25-40MPa and is maintained for 5-15 munites; demoulding, sintering for 1.5-2.5 hours at the temperature of 220-250 DEG C, and cooling along with a furnace; and machining to a needed dimension. The obtained frictional material can increase the mechanical characteristic and the service life of the ultrasonic motor.
Description
Technical field
The present invention relates to polyvinylidene difluoride (PVDF) (PVDF) base composite friction material, can be applicable to traveling wave type ultrasonic motor rotor or stator and drive surface layer, improve mechanical characteristics and the steady running life-span of motor.The invention still further relates to polyvinylidene difluoride (PVDF) (PVDF) base composite friction material preparation method.
Background technology
Travelling-wave type rotary ultrasonic motor (TRUM) is to utilize the inverse piezoelectric effect of piezoelectric ceramics to excite Vibration of Elastic Bodies, realizes the conversion of electric energy to mechanical energy; By the rubbing effect between stator and rotor, stator vibration being converted into mover again rotates or translation.Wherein, friction materials is as one of core parts of ultrasound electric machine, and the quality of its performance directly affects mechanical characteristics and the work-ing life of ultrasound electric machine.
The friction materials of travelling-wave type rotary ultrasonic motor is summed up and can be divided into: resin-matrix friction material, rubber-based friction materials, coated layer base frication material, stupalith etc.With other class material compared, resin-matrix friction material, there is long, stable, the advantage such as noise is little in work-ing life.The resin-matrix friction material that the interpolations such as tetrafluoroethylene, polyimide and the epoxy resin now adopting as TRUM strengthen and frictional behaviour regulates material to prepare.
The good characteristics such as polyvinylidene difluoride (PVDF) has weather-proof, wear-resistant, shock-resistant, physical strength is high, have the potential quality of making TRUM friction materials.But polyvinylidene difluoride (PVDF) exists the shortcoming of resistance toheat, through modification (as adding inorganic particulate, carbon fiber and frictional behaviour to regulate material etc.), can further improve its wear resisting property.Traditional polyvinylidene difluoride (PVDF) and friction materials have excellent mechanical property and tribological property, but for Friction Materials field, ultrasound electric machine field, polyvinylidene difluoride (PVDF) and friction materials rarely have report at present.
Summary of the invention
The object of the present invention is to provide a kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, overcome existing polyvinylidene difluoride (PVDF) friction materials and have poor heat resistance, and then cause the problem of difficulty in starting.
Another object of the present invention is to provide the preparation method of a kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, is characterized in that comprising the following component in weight part:
Described fortifying fibre has any of glass fibre, carbon fiber, salt of wormwood whisker, assorted fibre, aramid fiber; Carbon fiber, fiberglass surfacing are through silane coupling agent pre-treatment; Described coupling agent is silane coupling agent, the consumption of coupling agent is total amount 0～1 part and be greater than 0.Silane coupling agent processing inorganic materials can improve the bonding force of PVDF reisn base material, improves friction materials over-all properties.
Described reinforcing filler has any of cupric oxide, aluminum oxide, silicon carbide, silicon nitride, carbon nanotube, chromic oxide, titanium oxide, silicon oxide, potassium titanate, zinc oxide, norbide.
Described friction and heat conductivility conditioning agent have any or several mixtures of graphite, copper bronze, molybdenumdisulphide, paracril, polybenzoate, tetrafluoroethylene.The frictional behaviour that can improve material after interpolation frictional property regulator, increases frictional coefficient, improves the stalling torque of TRUM; Improve the modulus of compression of material, improve the Hardness Match of friction pair to improve the wear resistance of material and the work-ing life of TRUM; Improve thermal conductivity (the good thermal conductivity of inorganic materials is conducted the heat of TRUM generation in service in time, reduces the creep and the adhesive wear that produce because of localized hyperthermia), reach the object of the over-all properties of improving TRUM.
A preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, is characterized in that, comprises the following steps:
1) take in proportion each component, first premix 20min in ball mill, then adopt ethanol wet-mixed 3～5h is dry at 80 ℃;
2) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 25～40MPa, pressure keeps 5～15min; The demoulding, at 220～250 ℃ of sintering 1.5～2.5h, furnace cooling;
3) be machined to desired size.
Contriver is for the contact friction function mechanism under ultrasonic frequency domain vibration environment between ultrasound electric machine stator and rotor, select polyvinylidene difluoride (PVDF) as friction material matrix, adopt organic-inorganic filler to carry out modification, obtain excellent polyvinylidene difluoride (PVDF) base frication material, improved mechanical characteristics and the work-ing life of ultrasound electric machine.
Embodiment:
Below with reference to embodiment, technical scheme of the present invention is described:
Polyvinylidene difluoride (PVDF), model 2801, French Arkema produces; Tetrafluoroethylene, median size is 25 μ m, Shandong China fluorine chemical limited liability company provides; Polybenzoate, particle diameter is 25～30 μ m, middle vast and boundless morning twilight new chemical materials limited liability company produces; Aluminium sesquioxide, Nanjing Zheng Zhi Science and Technology Ltd. provides; Ground carbon fiber black powder, mean diameter is 7 μ m, and mean length is 50～70 μ m, and Nanjing Zhi Ning filler company limited provides; Graphite, purity 99.85%, granularity is less than or equal to 30 μ m, Shanghai gelatinizing plant produced.
Embodiment 1
A kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, comprises 100 parts of the following component in weight part: PVDF, and friction and heat conductivility regulate 20 parts of material tetrafluoroethylene, 20 parts, polyphenyl fat, 10 parts of copper bronzes.
A preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, step is as follows:
A) PVDF resin, polybenzoate, copper bronze, tetrafluoroethylene first premix 20min in ball mill in proportion, then adopt ethanol wet-mixed 3h is dry at 80 ℃;
B) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 35MPa, pressure keeps 15min; The demoulding, at 220～250 ℃ of sintering 2h, furnace cooling.
C) be machined to desired size, stand-by.
Embodiment 2
A kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, comprises 100 parts of the following component in weight part: PVDF, 30 parts, fortifying fibre carbon fiber, 1.0 parts of silane resin acceptor kh-550s.
A preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, step is as follows:
A) PVDF resin, carbon fiber, coupling agent first premix 20min in ball mill in proportion, then adopt ethanol wet-mixed 3h is dry at 80 ℃;
B) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 35MPa, pressure keeps 15min; The demoulding, at 220～250 ℃ of sintering 2h, furnace cooling;
C) be machined to desired size, stand-by.
Embodiment 3
A kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, comprises 100 parts of the following component in weight part: PVDF, 30 parts, reinforcing filler aluminum oxide.
A preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, step is as follows:
A) PVDF resin, aluminum oxide, first premix 20min in ball mill in proportion, then adopt ethanol wet-mixed 3h is dry at 80 ℃;
B) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 35MPa, pressure keeps 15min; The demoulding, at 220～250 ℃ of sintering 2h, furnace cooling;
C) be machined to desired size, stand-by.
Embodiment 4
A kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, comprise the following component in weight part: PVDF100 part, friction and heat conductivility regulate 20 parts of material tetrafluoroethylene, 20 parts, polyphenyl fat, 10 parts of copper bronzes, 30 parts, fortifying fibre carbon fiber, 1.0 parts of silane resin acceptor kh-550s.
A preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, step is as follows:
A) PVDF resin, tetrafluoroethylene, polybenzoate, copper bronze, carbon fiber, coupling agent first premix 20min in ball mill in proportion, then adopt ethanol wet-mixed 3h is dry at 80 ℃;
B) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 35MPa, pressure keeps 15min; The demoulding, at 220～250 ℃ of sintering 2h, furnace cooling;
C) be machined to desired size, stand-by.
Embodiment 5
A kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, comprise 100 parts of the following component in weight part: PVDF, 20 parts, fortifying fibre carbon fiber, friction and heat conductivility conditioning agent: 5 parts, graphite, 10.0 parts of molybdenumdisulphide, 20 parts, polyphenyl fat, 10 parts of copper bronzes, 5.0 parts, reinforcing filler aluminum oxide, 0.1 part of silane resin acceptor kh-550.
A preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, step is as follows:
A) PVDF resin, graphite, polybenzoate, copper bronze, aluminum oxide, molybdenumdisulphide, carbon fiber, coupling agent first premix 20min in ball mill in proportion, then adopt ethanol wet-mixed 3h is dry at 80 ℃;
B) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 35MPa, pressure keeps 15min; The demoulding, at 220～250 ℃ of sintering 2h, furnace cooling;
C) be machined to desired size, stand-by.
Embodiment 6
A kind of travelling-wave type rotary ultrasonic motor polyvinylidene difluoride (PVDF) base composite friction material, comprises the following component in weight part: PVDF100 part.
A preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, step is as follows:
A) PVDF resin first premix 20min in ball mill, then adopt ethanol wet-mixed 3h is dry at 80 ℃;
B) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 35MPa, pressure keeps 15min; The demoulding, at 220～250 ℃ of sintering 2h, furnace cooling;
C) be machined to desired size, stand-by.
The indices of the material that embodiment 1-6 obtains is as table 1:
Table 1
| Embodiment | Modulus of compression (MPa) | Frictional coefficient | Abrasion loss/100 hour (mg) |
| 1 | 289.45 | 0.24 | 8.0 |
| 2 | 297.87 | 0.26 | 4.2 |
| 3 | 270.15 | 0.28 | 5.6 |
| 4 | 285.71 | 0.28 | 2.4 |
| 5 | 294.84 | 0.31 | 1.8 |
| 6 | 252.76 | 0.22 | 14.7 |
In embodiment 6, do not add any filler.
Embodiment 1 adds friction and heat conductivility regulates material, can improve the frictional behaviour of UHMW-PE material, present case is keeping under frictional coefficient variation not quite, improve the modulus of compression of material, can improve motor thermal conductivity, conduct in time the heat of TRUM generation in service, reduce the creep and the adhesive wear that because of localized hyperthermia, produce, thereby reduced its abrasion loss;
Embodiment 2 adds fortifying fibre, fortifying fibre has high specific tenacity, specific modulus, good corrosion-resistant, thermal conductivity and self-lubricating, in present case, add carbon fiber the Young's modulus of material and frictional coefficient are all improved, effectively reduced its abrasion loss simultaneously;
Embodiment 3 adds reinforcing filler, adds reinforcing filler and can significantly improve mechanical property, the crocking resistance of material, and modulus of compression, frictional coefficient are improved compared with case 6, abrasion loss reduces significantly;
Embodiment 4 adds fortifying fibre, coupling agent, friction and heat conductivility and regulates material, adds friction and heat conductivility adjusting material on the basis of example 2, and the abrasion loss of material significantly reduces;
Embodiment 5 adds all material, not only make frictional coefficient improve, and the abrasion loss of material is very little.
Stalling torque and no-load speed are 2 important indicators in TRUM mechanical characteristics: stalling torque can reflect the frictional interface motivating force of material, and are convertible into the rubbing factor under ultrasound-driven condition; No-load speed can reflect the interface conversion efficiency of ultrasound electric machine friction materials.The stalling torque of the Φ 60TRUM of application PVDF matrix material can reach 1.0N.m; No-load speed reaches 200r.min
-1; Improve the Hardness Match of friction pair to improve the wear resistance of material and the work-ing life of TRUM, more than motor is estimated and can be reached 8000h work-ing life; Reach the object of the over-all properties of improving TRUM.
The component that embodiment 7 to embodiment 15 adopts is as shown in table 2, and in form, the unit of all components is weight part, and preparation method is with embodiment 1.
Table 2
The above; it is only preferably embodiment of the present invention; protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in, the simple change of the technical scheme that can obtain apparently or equivalence replace all fall within the scope of protection of the present invention.
Claims (1)
1. a preparation method for polyvinylidene difluoride (PVDF) base composite friction material for travelling-wave type rotary ultrasonic motor, is characterized in that, comprises the following steps:
(1) take in proportion 100 parts of polyvinylidene difluoride (PVDF), 0-30 part fortifying fibre, the reinforcing filler of 0-30 part, 0 ~ 50 part and be greater than friction and the heat conductivility conditioning agent of 0 part, first premix 20min in ball mill, adopt again ethanol wet-mixed 3 ~ 5h, dry at 80 ℃;
Described fortifying fibre is any of glass fibre, carbon fiber, salt of wormwood whisker, assorted fibre, aramid fiber;
Described reinforcing filler is any of cupric oxide, aluminum oxide, silicon carbide, silicon nitride, carbon nanotube, chromic oxide, titanium oxide, silicon oxide, potassium titanate, zinc oxide, norbide;
Described friction and heat conductivility conditioning agent have any or several mixtures of graphite, copper bronze, molybdenumdisulphide, paracril, polybenzoate, tetrafluoroethylene;
Carbon fiber, fiberglass surfacing are through silane coupling agent pre-treatment; Described coupling agent is silane coupling agent, and the consumption of coupling agent is 0 ~ 1 part and is greater than 0;
(2) above-mentioned pellet is added to die cavity, shaped by fluid pressure, pressure 20 ~ 40MPa, pressure keeps 5 ~ 15 min; The demoulding, at 220～250 ℃ of sintering 1.5 ~ 2.5h, furnace cooling;
(3) be machined to desired size.
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| CN117343455B (en) * | 2023-12-06 | 2024-04-26 | 广州市晶邦密封技术有限公司 | High-rebound-resilience polytetrafluoroethylene composite material and preparation method thereof |
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| CN102391556A (en) * | 2011-07-01 | 2012-03-28 | 南京航空航天大学 | Crosslinked UHMW-PE (ultra-high molecular weight-polyethylene) friction material for traveling wave type rotating ultrasonic motor, and preparation method and application thereof |
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