CN101161759A - Dualistic bonding system high-performance synthetic friction material and preparation method thereof - Google Patents
Dualistic bonding system high-performance synthetic friction material and preparation method thereof Download PDFInfo
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- CN101161759A CN101161759A CNA200610140478XA CN200610140478A CN101161759A CN 101161759 A CN101161759 A CN 101161759A CN A200610140478X A CNA200610140478X A CN A200610140478XA CN 200610140478 A CN200610140478 A CN 200610140478A CN 101161759 A CN101161759 A CN 101161759A
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Abstract
The invention belongs to the new material technical field, in particular relates to a binary cohesion system high performance synthetic friction material for friction plates on brake or clutch of a power generating machine and the preparation method thereof. The binary cohesion system high performance synthetic friction material of the invention comprises cohesive material, reinforcing fiber and raw material for friction performance modifying agent. The invention has the characteristics that: the cohesive material comprises organic cohesive material and inorganic cohesive material mixed by amorphous fine silicon powder and water; the raw material against the gross weight contains 5 to 25 percent of organic cohesive material, 3 to 15 percent of amorphous fine silicon powder, 5 to 30 percent of water, 25 to 50 percent of reinforcing fiber and 30 to 50 percent of friction performance modifying agent. The preparation method includes the preparation process of molding material, compression process and heat treatment process. The binary cohesion system high performance synthetic friction material has stable friction coefficient and low fluctuation of wear rate under high temperature working conditions. The preparation method of the invention can greatly enhance the productivity and improve industrial sanitary conditions.
Description
Technical field
The invention belongs to field of new, particularly relate to a kind of dualistic bonding system high-performance synthetic friction material that is applicable to power machine stopper and clutch friction sheet and preparation method thereof.
Background technology
The synthetic friction material of prior art, since the twenties in 20th century nearly all with phenolic resinoid and/or elastomeric organic binder bond, fortifying fibre, frictional property regulator is formed.The friction plate that this synthetic friction material is made is on the one hand under 200～400 ℃ the worst hot case condition usually, and the microcosmic anisotropic property of this material, makes the temperature of its many particles under working conditions reach 700 ℃ even higher; Organic binder bond in its prescription has begun to take place thermolysis in the time of 220～250 ℃ on the other hand, and thermal weight loss reaches about 20% in the time of 300～350 ℃, and thermal weight loss is greater than 95% in the time of 600～650 ℃.Just because of above-mentioned reason, the friction plate that the synthetic friction material of prior art is made frictional coefficient before 250 ℃ is more steady, and frictional coefficient obviously descends after temperature is higher than 250 ℃, forms " heat fading " phenomenon; Simultaneously, aspect wearing and tearing, play wear rate about 300 ℃ and obviously become big occur " thermal wear ", also become big continuously and healthily with temperature rising wear rate; And the production efficiency of the synthetic friction material of this organic binder bond is low, and the industrial hygiene condition is poor.
Summary of the invention
It is little that the technical problem to be solved in the present invention provides the fluctuation of stable friction factor under a kind of worst hot case condition, wear rate, and can increase substantially production efficiency, improve dualistic bonding system high-performance synthetic friction material of industrial hygiene condition and preparation method thereof.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of dualistic bonding system high-performance synthetic friction material is made up of binding agent, fortifying fibre, frictional property regulator raw material, it is characterized in that: described binding agent is made up of organic binder bond and the mineral binder bond that amorphous silicon micro mist and water are formed; In the raw material gross weight, wherein: the organic adhesive agent content is 5～25%, and the amorphous silicon powder content is 3～15%, and water-content is 5～30%, and reinforced fiber content is 25～50%, and frictional property regulator content is 30～55%.
Above-mentioned dualistic bonding system high-performance synthetic friction material is characterized in that: when described amorphous silicon micro mist was ferroalloy smelting or industrial silicon, by the siliceous flue gas that petticoat pipe is collected, the oxidation cohesion was after the fine silica powder that the dry dust collection device is collected; About its median size 150 nanometers, specific surface area 15～30m
2/ g has high reactive behavior, belongs to non-crystalline state SiO
2
Above-mentioned dualistic bonding system high-performance synthetic friction material is characterized in that: described water is the moisture that contains in pure water and/or the raw material.
Above-mentioned dualistic bonding system high-performance synthetic friction material, it is characterized in that: described organic binder bond is phenolic resinoid and/or synthetic rubber, fortifying fibre is natural and/or synthetical is organic and/or the blend fiber of inorganic fibre, and frictional property regulator is mineral filler and/or organic filler and/or metal powder, bits.
The preparation method of above-mentioned dualistic bonding system high-performance synthetic friction material, its feature comprises the steps:
(1) molding compound preparation section: (a) can be earlier with all or part of solid material of the organic binder bond in the binding agent with the amorphous silicon micro mist grind stir after, be uniformly mixed into solid mixture with all the other solid material in binding agent, fortifying fibre, the frictional property regulator; Also can earlier all solids material in binding agent, fortifying fibre, the frictional property regulator be uniformly mixed into solid mixture; Also can respectively the solid material except that the amorphous silicon micro mist in binding agent, fortifying fibre, the frictional property regulator be uniformly mixed into solid mixture and amorphous silicon micro mist and all or part of water are mixed into wet feed earlier; (b) in the solid mixture of (a), add remaining whole raw material again and be uniformly mixed into the granulation material; (c) excessive moisture in the granulation material of (b) is removed made molding compound then, the molding compound water ratio is 5～15%;
(2) suppression process: molding compound added touch 5～30 seconds of pressurizeing in the tool, take out product afterwards from touch tool, touching the tool forming pressure is 40～100MPa, touches the tool temperature and be room temperature～80 ℃;
(3) heat treatment step: product is put into heating installation carry out drying, curing; Dry with solidify can proceed step by step, also can finish continuously; 5～25 minutes/millimeter time of drying, 85 ± 10 ℃ of drying temperatures; 60～100 minutes/millimeter set times, 160～280 ℃ of solidification values.
The amorphous silicon micro mist that adopts in the material prescription of the present invention contact afterwards by aquation with water in the prescription, amorphous silicon micro mist aquation rear surface forms the Si-OH key of similar silica gel structure, and beginning to dewater at 40 ℃ of left and right sides Si-OH keys aggregates into the micro mist long-chain of the mortise that the Si-O-Si key forms:
This long-chain reticulated structure can remain to (crystalline state SiO more than 1200 ℃ always
2Micro mist does not then have this network structure).Amorphous silicon micro mist dehydration finishes back normal temperature state and promptly has intensity greater than 10MPa, and this intensity remain to 500 ℃ constant substantially, intensity can reach more than the 20MPa between 500～600 ℃, intensity is rapider after 600 ℃ increases fast.This inorganic long-chain reticulated structure of amorphous silicon micro mist and the cancellated dual function of three-dimensional of organic binder bond, constitute the dualistic bonding system of high-performance synthetic friction material of the present invention, it has guaranteed that from microtexture synthetic friction material has stable friction factor, the little premium properties of wear rate fluctuation under worst hot case, overcome the synthetic friction material of prior art, serious because of decompose influence " heat fading " and " thermal wear " with temperature rising organic binder bond Continuous Heat.
The mineral binder bond that amorphous silicon micro mist in the binding agent of material prescription of the present invention and water are formed, less than the organic binder bond softening point temperature time, formed long-chain reticulated structure with higher-strength, and this long-chain reticulated structure continues to strengthen and finish in drying process, so therefore product is keeping comparatively intact contour structure size, intact contour structure size can not change because of the softening fusion of organic binder bond again.This just makes the directly normal temperature compression moulding fast of molding compound of adopting material of the present invention to make, and the product after the moulding does not need to carry out the thermofixation processing again in the pressurization apparatus yet and directly finish the production efficiency that curing so the present invention---dualistic bonding system high-performance synthetic friction material and preparation method thereof---can increase substantially synthetic friction material under atmospheric pressure state.
In the prescription of material of the present invention because the mineral binder bond that has adopted amorphous silicon micro mist and water to form, make the preparation section of molding compound become the semi-wet method process, and molding compound to be made into water ratio be 5～15% granulation material, than the dry process that prior art extensively adopts, the industrial hygiene condition of molding compound preparation and suppression process is greatly improved.
Embodiment
Embodiment 1: the organic binder bond of 11 kilograms of powdery phenolic resinoids and synthetic rubber composition, 5.5 kilograms of amorphous silicon micro mists, 38 kilograms of enhancing blend fiber, 37 kilograms of frictional property regulators are uniformly mixed into solid mixture, afterwards 8.5 kg water are sprayed into the solid mixture in the stirring, making it to be uniformly mixed into the granulation material of water ratio 8.5%, is 6% molding compound then to water ratio with the airing of granulation material.Molding compound is added temperature be controlled in 55 ℃ the mould, and put the steel backing of handling well, take out product after 25 seconds with the exert pressure of 55MPa.Product is put into the moisture eliminator that temperature is controlled at 95 ℃, carried out drying with 15 minutes/millimeter time, dried product is put into the curing oven that temperature is controlled at 260 ℃ again, carries out thermofixation with 70 minutes/millimeter time.Obtain automobile stopper disc type friction plate.
Embodiment 2: earlier with 8 kilograms of solid phenolic resinoids in the organic binder bond with 6 kilograms of amorphous silicon micro mists grind stir after, again with organic binder bond in 5 kilograms of elastomer powders, 32 kilograms strengthen blend fiber, 38 kilograms of frictional property regulators are uniformly mixed into solid mixture, afterwards 11 kg water are sprayed into the solid mixture in the stirring, making it to be uniformly mixed into the granulation material of water ratio 11%, is 8% molding compound then to water ratio with the airing of granulation material.Molding compound is added temperature be controlled in 70 ℃ the mould, take out product after 10 seconds with the exert pressure of 70MPa.Product is put into the dry solidification stove, earlier furnace temperature is set in 80 ℃ and carried out drying with 20 minutes/millimeter time, the furnace temperature that raises again afterwards is set in 230 ℃ and carried out thermofixation with 80 minutes/millimeter time with temperature.Obtain automobile stopper drum-type friction plate.
Embodiment 3: earlier the organic binder bond of 15 kilograms of powdery phenolic resinoids and synthetic rubber composition, 40 kilograms of enhancing blend fiber, 31 kilograms of frictional property regulators are uniformly mixed into solid mixture, again 6.5 kilograms of amorphous silicon micro mists and 3.5 kg water are mixed into wet feed.Afterwards wet feed is added solid mixture and stir, spray into the granulation molding compound that 4 kg water make it to be uniformly mixed into water ratio 7.5% simultaneously.Molding compound is added temperature be controlled in 65 ℃ the mould, take out product after 15 seconds with the exert pressure of 85MPa.Product is put into the dry solidification stove, earlier furnace temperature is set in 90 ℃ and carried out drying with 25 minutes/millimeter time, the furnace temperature that raises again afterwards is set in 200 ℃ and carried out thermofixation with 95 minutes/millimeter time with temperature.Obtain the engineering machinery clutch friction plate.
Embodiment 4: earlier 8 kilograms of amorphous silicon micro mists, 38 kilograms of enhancing blend fiber, 31 kilograms of frictional property regulators are uniformly mixed into solid mixture.Be that 35% 14 kg water emulsion organic binder bonds add solid mixture and stir afterwards with water ratio, spray into 9 kg water simultaneously and make it to be uniformly mixed into the granulation material of water ratio 13.9%, adopting hot blast that the granulation material is dried by the fire to water ratio then is 8% molding compound.Molding compound is added temperature be controlled in 75 ℃ the mould, and put the steel backing of handling well, take out product after 25 seconds with the exert pressure of 85MPa.Product is put into the moisture eliminator that temperature is controlled at 85 ℃, carried out drying with 25 minutes/millimeter time, dried product is put into the curing oven that temperature is controlled at 240 ℃ again, carries out thermofixation with 90 minutes/millimeter time.Obtain the train brake bush.
Claims (4)
1. a dualistic bonding system high-performance synthetic friction material is made up of binding agent, fortifying fibre, frictional property regulator raw material, it is characterized in that: described binding agent is made up of organic binder bond and the mineral binder bond that amorphous silicon micro mist and water are formed; In the raw material gross weight, wherein: the organic adhesive agent content is 5～25%, and the amorphous silicon powder content is 3～15%, and water-content is 5～30%, and reinforced fiber content is 25～50%, and frictional property regulator content is 30～55%.
2. dualistic bonding system high-performance synthetic friction material according to claim 1, it is characterized in that: when described amorphous silicon micro mist is ferroalloy smelting or industrial silicon, by the siliceous flue gas that petticoat pipe is collected, the oxidation cohesion is after the fine silica powder that the dry dust collection device is collected.
3. dualistic bonding system high-performance synthetic friction material according to claim 1 is characterized in that: described water is the moisture that contains in pure water and/or the raw material.
4. the preparation method of dualistic bonding system high-performance synthetic friction material according to claim 1, its feature comprises the steps:
(1) molding compound preparation section: a can be earlier with all or part of solid material of the organic binder bond in the binding agent with the amorphous silicon micro mist grind stir after, be uniformly mixed into solid mixture with all the other solid material in binding agent, fortifying fibre, the frictional property regulator; Also can earlier all solids material in binding agent, fortifying fibre, the frictional property regulator be uniformly mixed into solid mixture; Also can respectively the solid material except that the amorphous silicon micro mist in binding agent, fortifying fibre, the frictional property regulator be uniformly mixed into solid mixture and amorphous silicon micro mist and all or part of water are mixed into wet feed earlier; B adds remaining whole raw material again and is uniformly mixed into the granulation material in the solid mixture of a; C removes the excessive moisture in the granulation material of b then and makes molding compound, and the molding compound water ratio is 5～15%;
(2) suppression process: molding compound added touch 5～30 seconds of pressurizeing in the tool, take out product afterwards from touch tool, touching the tool forming pressure is 40～100MPa, touches the tool temperature and be room temperature～80 ℃;
(3) heat treatment step: product is put into heating installation carry out drying, curing; Dry with solidify can proceed step by step, also can finish continuously; 5～25 minutes/millimeter time of drying, 85 ± 10 ℃ of drying temperatures; 60～100 minutes/millimeter set times, 160～280 ℃ of solidification values.
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| CNA200610140478XA CN101161759A (en) | 2006-10-09 | 2006-10-09 | Dualistic bonding system high-performance synthetic friction material and preparation method thereof |
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| CNA200610140478XA CN101161759A (en) | 2006-10-09 | 2006-10-09 | Dualistic bonding system high-performance synthetic friction material and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031088A (en) * | 2010-12-09 | 2011-04-27 | 南京航空航天大学 | Inorganic-organic composite friction material and preparation method thereof |
| CN102093841A (en) * | 2010-11-11 | 2011-06-15 | 咸阳师范学院 | Double-adhesive friction material |
| CN105650176A (en) * | 2014-11-30 | 2016-06-08 | 衡阳市安骋汽车配件有限公司 | Friction material, brake pad and brake pad preparation method |
| CN105650177A (en) * | 2014-11-30 | 2016-06-08 | 衡阳市安骋汽车配件有限公司 | Low-hardness friction material, brake pad and brake pad preparation method |
| CN109737159A (en) * | 2019-01-11 | 2019-05-10 | 大连理工（营口）新材料工程中心有限公司 | A kind of complex salt binder composite friction material and preparation method thereof |
-
2006
- 2006-10-09 CN CNA200610140478XA patent/CN101161759A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093841A (en) * | 2010-11-11 | 2011-06-15 | 咸阳师范学院 | Double-adhesive friction material |
| CN102031088A (en) * | 2010-12-09 | 2011-04-27 | 南京航空航天大学 | Inorganic-organic composite friction material and preparation method thereof |
| CN102031088B (en) * | 2010-12-09 | 2013-03-13 | 南京航空航天大学 | Inorganic-organic composite friction material and preparation method thereof |
| CN105650176A (en) * | 2014-11-30 | 2016-06-08 | 衡阳市安骋汽车配件有限公司 | Friction material, brake pad and brake pad preparation method |
| CN105650177A (en) * | 2014-11-30 | 2016-06-08 | 衡阳市安骋汽车配件有限公司 | Low-hardness friction material, brake pad and brake pad preparation method |
| CN109737159A (en) * | 2019-01-11 | 2019-05-10 | 大连理工（营口）新材料工程中心有限公司 | A kind of complex salt binder composite friction material and preparation method thereof |
| CN109737159B (en) * | 2019-01-11 | 2020-07-28 | 大连理工（营口）新材料工程中心有限公司 | Composite salt binder composite friction material and preparation method thereof |
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Open date: 20080416 |