CN105038101B - A kind of cellulose strengthens the anti-wear-resisting brake material and preparation method thereof of uttering long and high-pitched sounds of non-stick disk - Google Patents
A kind of cellulose strengthens the anti-wear-resisting brake material and preparation method thereof of uttering long and high-pitched sounds of non-stick disk Download PDFInfo
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Abstract
The invention discloses a kind of cellulose strengthens non-stick disk anti-utter long and high-pitched sounds wear-resisting brake material and preparation method, it is made up of the raw material of following weight part ratio：6～18 parts of native cellulose (coupling agent of surface coating fiber element weight 1～3%) through fire-retardant, thermostabilization and surface treatment, 8～24 parts of modified resin matrix, 3～12 parts of powder core shell rubbers, 3～9 parts of epoxidized vegetable oil, 5～15 parts of friction modifier, 6～12 parts of carbonaceous material, surplus barium sulfate is filled to 100 parts.Preparation method is：By fire-retardant for native cellulose and stabilizing treatment, followed by spray coupling agent the shredding that suspends, it is heated to coupling agent complete wetting between 30～90 DEG C, surface-treated cellulose and remaining component above-mentioned are mixed to get mould pressing powder in Z-type blender, hot-forming under the conditions of 120～160 DEG C, 5～10Mpa, hot pressing time is typically advisable in 1.5～3min/mm.The present invention adds the composition with loose structure in dispensing so that brake(-holder) block has non-stick disk and prevents uttering long and high-pitched sounds and wear-resisting effect.
Description
Technical field
The invention belongs to technical field of composite materials, it is related to a kind of cellulose and strengthens the anti-wear-resisting brake material of uttering long and high-pitched sounds of non-stick disk
And preparation method thereof.
Background technology
The electromagnetism of the uses such as harbour, wind-powered electricity generation, mine, metallurgy, lifting, lathe, elevator or liquid braking device, its actuator
Frictional damping to idol of rubbing, that is, by wear-resisting brake(-holder) block contact with brake disc surface produced by frictional force be used as brake force, make
The lifting of equipment or rotary part can stop in speed governing or be decelerated to.Either account for the dead electricity braking of main flow at present, be also switched on
Braking, its brake(-holder) block/brake disc is often in closure state.Due to being in high humidity above-mentioned its working environment of cited equipment more
The condition such as is tanned by the sun in degree or field, and steel used or iron-based brake disc surface are easy to produce electrochemical corrosion and even get rusty, once
Equipment interval certain time does not start, then easily cause brake(-holder) block/brake disc locking, needs to tear machine open and keep in repair to accomplish system from newly
The opening and closing of moving plate/brake disc freely, extremely time-consuming is taken a lot of work.It is just made to possess non-stick disk work(therefore from the material design of brake(-holder) block
It can be a kind of solution of Initiative Defense type.
On the other hand, frictional damping often causes noise, and strong noise can be on in-plant operative employee and impact
The physiology of the personnel in the range of in one's power causes the different harm of degree with psychology, therefore prevents brake oil from causing industry for a long time
The attention on boundary.Research points out that the factor affecting frictional noise is a lot, such as brakes the frictional behavior of sheet material, to the motion ginseng rubbing even
Number and the mechanical environment to the even operation that rubs etc..
The research of frictional behavior and brake oil relation about braking sheet material belongs to interdisciplinary (material science and machinery
Engineering) problem, some theoretical researches think brake oil with braking sheet material hard distributed mutually inequality in close relations；Both at home and abroad
Large-scale friction material manufacturing enterprise then generally believes that the compression ratio of braking sheet material and the noise of brake have direct relation
Then noise is little for compression ratio height, the low then noise of compression ratio is big；In many middle-size and small-size friction material enterprises then using Rockwell hardness index
Simply it is equivalent to decrement to evaluate the noise characteristic of braking sheet material.
Chinese patent CN 202158125 U apply for a kind of anti-rust friction material, way be smear in friction material surface anti-
Rust agent oxide layer；CN 202833769 U applies for a kind of brake pad with low noise, thickness from centre to both sides for its friction material layer
It is gradually reduced；CN 01126573.6 discloses a kind of structure of improved car brake piece, formula and its processing technique, and it carries
Gone out a kind of solution of car brake noise, feature is that brake lining is decomposed into layer structure, including braking operation layer,
Heat isolating damping layer, backboard, vibrationproof layer, the material of braking operation layer is to be adjusted by thermosetting resin, reinforcing fiber, coefficient of friction
Agent, inserts composition, organic based composites that it is main reinforcement system with mineral fibres that damping heat-insulation layer adopts.Be more than from
Brake(-holder) block formal structure carries out the patent application of preventing noise droping noise in form.CN 104497974 A applies for a kind of safety of low noise
Type friction material and the preparation method of friction plate, used in its component, fiber system metallic fiber and synthetic organic fibre, used
Elastomeric material be nitrile powder and tyre talc, and with the addition of organic Frication powder.The patent description of Application No. 201210107717.7
File discloses a kind of multiway tree aliphatic radical carbon composite type disc type brake(-holder) block and preparation method thereof, and this brake(-holder) block is by following raw materials one
Secondary compression molding：Unmodified phenolic resin, Effect of Organosilicon-modified Phenol-formaldehyde Resin, polyacrylate modified phenolic resin, polyacrylonitrile
Carbon fiber, manufactured particles' graphite, natural flake graphite, granular coke, carborundum, Fanglun slurry cake, compound mineral fiber, steel is fine
Dimension, red copper powder, the wearability of Iron sulfuret. and its invention product of barium sulfate is good, low noise simultaneously.
Content of the invention
The purpose of the present invention is, for existing modified phenolic base brake(-holder) block, non-stick disk is prevented with the ineffective shape of Resolving probiems of uttering long and high-pitched sounds
Condition, proposes with porous native cellulose, nucleocapsid structure rubber powder (porous kernel and precrosslinked rubber cortex) and epoxidation
Vegetable oil is bulk composition, adds modified resin matrix, and hot-forming non-stick disk of manufacturing is prevented uttering long and high-pitched sounds wear-resisting braking sheet material.
The technical scheme that the present invention takes is：
A kind of cellulose strengthens the anti-wear-resisting brake material of uttering long and high-pitched sounds of non-stick disk, is made up of the raw material of following hundred parts of ratios of weight：Warp
Cross the cellulose 6～18% of fire-retardant, thermostabilization and its surface treatment, powdered rubber 3～12%, epoxidized vegetable oil 3～
9%, modified resin matrix 8～24%, friction modifier 5～15%, carbonaceous material 5～15%, remaining is inserts.
The innovation of the solution of the present invention is, adds lubricant component and porous in the dispensing of friction material
Sound-absorbing material is so that brake(-holder) block has non-stick disk prevents uttering long and high-pitched sounds performance have high-wearing feature concurrently.It is enhancing group from native cellulose
Point, process through fire-retardant, thermostabilization and make braking sheet material, such brake(-holder) block and nitrogen after mixing homogeneously with other components
When changing process carbon steel, cast steel, forged steel and grey iron, the brake disc of compacted ink iron material matter as occasionally using to rubbing, above-mentioned resistance can be utilized
The loose structure of the cellulose that combustion, thermostabilization were processed, so that brake(-holder) block has the effect that non-stick disk is prevented uttering long and high-pitched sounds, overcomes mesh
Before the mineral fibres that commonly uses and crystal whisker materials (being solid continuous structure) noise reduction sound effective value difference and after wearing and tearing its abrasive dust can make
The shortcoming becoming the secondary injury of environment；Add the nucleocapsid structure rubber powder of epidermis precrosslink in formula, braking sheet material can be improved
Pliability, stickiness and wearability, and there is good sound absorption effect the howling during braking of surface reduced；In braking
In the mixing link of piece mould pressing powder, filling epoxidized vegetable oil can prevent dust from flying it can also be ensured that the high-abrasive material that is pressed into
Frictional coefficient value is unlikely to too high it is also possible to play the anti-effect uttered long and high-pitched sounds, and oil-based ingredient is also prevented to be occurred for a long time
Under closure condition, brake(-holder) block can cling the defect to even brake disc of rubbing.
Preferably, described cellulose origin is in timber, sawdust, Cotton Gossypii, cotton linter, wheat straw, Caulis et Folium Oryzae, phragmites communiss, fiber crops, Mulberry
Skin, bagasse or antibacterial.Such native cellulose has microcosmic loose structure, has preferable sqouynd absorption lowering noise and isolation effect
Should.
The fire-retardant, thermostabilization of cellulose process the Firebrake ZB adopting, APP, pyrophosphate, organophosphorus ester, three
Poly cyanamid-tricresyl phosphate (butoxyethyl group) ester (TBEP), containing magnesium salts etc..Inorganic salts solid constituent can mix pasty state again with water
It is coated on native cellulose surface, dehydration afterwards is dried, it is molten that organophosphorus ester etc. obtains after can use the dissolving of its organic solvent
Liquid sprays and naturally dries in the air on cellulose to no low volatile spilling；Fire-retardant, stabilizer adding proportion should be cellulose material
The 10～20% of amount.
Preferably, the surface treatment step of described cellulose is：Coat the coupling of 1～3% (w/w) in cellulose surface
Agent.
Described coupling agent is silane coupling agent, titanate coupling agent, zirconium ester coupling agent or aluminate coupling agent etc..Even
Connection agent can improve fiber and the adhesive strength of resin is gone, and should select similar with resin structure when selecting coupling agent as far as possible
's.
Preferably, described powdered rubber is butadiene-styrene rubber or nitrile rubber, and its particle size range is 20～800nm.Have
Nucleocapsid structure, the floating bead of its core system loose structure or micropore glass powder, epidermal area dip styrene butadiene rubber latex or nitrile rubber
Latex, prewired stoichiometric vulcanizing agent and vulcanization accelerator in latex, after centrifugal spray drying at 140～160 DEG C
Precrosslink.
Preferably, described modified resin matrix, with phenolic resin, melamine resin, coumarone indene resin, epoxy resin, gathers
Urethane or BMI are raw material, and method of modifying is to hand over two or more blending of above-mentioned resin or interlaminar resin
Connection forms inierpeneirating network structure or is grafted the active group in above-mentioned resin or blocks.
Preferably, its epoxide number of described epoxidized vegetable oil should be greater than 6.0%, and iodine number is less than 3%, and flash-point is more than 280
DEG C, thermal-stable is weightless to be less than 6%.Epoxidized vegetable oil is good with the compatibility of resin, and volatility is little, is difficult to extract out, has
Good electrical property and preferable pliability, play plasticising and stable effect to the modified resin in material.
Preferably, described friction modifier is that troilite powder, flint clay, zirconium English powder, gama-alumina or magnalium are sharp brilliant
Stone, granularity is less than 300 mesh.Above-mentioned friction modifier can be with stabilizing material frictionand wear properties at different temperatures, outstanding
It is friction and wear behavior under middle temperature for the material.And for semi-metallic brake pad domestic at present, using this kind of nothing
Machine powder can reduce brake material density and hardness.
Described carbonaceous material is vermicular expanded graphite, crystalline flake graphite, active carbon with high specific surface area powder, granular porous Jiao
Charcoal, nanometer hard carbon black, NACF, single wall or Uric acid.Carbonaceous material have high specific strength, high ratio modulus,
High temperature resistant, corrosion-resistant, endurance, creep resistant, conductive heat transfer and the little feature of thermal coefficient of expansion, can be used to strengthen composite
Frictional behaviour.In selected Carbon fibe content range, with the increase of carbonaceous material content, its impact strength increases, friction
Coefficient reduces, and wear rate reduces, and extends brake(-holder) block service life.
The invention provides a kind of cellulose strengthens non-stick disk prevents the preparation method of wear-resisting brake material of uttering long and high-pitched sounds, including as follows
Step：
(1) cellulose is carried out after fire-retardant, thermostabilization, coupling processing, stand-by；
(2) above-mentioned cellulose, powdered rubber, epoxidized vegetable oil, modified resin matrix, friction modifier, carbonaceous material are taken
Material, filler mixing, prepared mould pressing powder；
(3) above-mentioned mould pressing powder need to be after preliminary drying, preheating, and cure under pressure molding obtains final product.
The comprising the following steps that of above-mentioned preparation method：
(1) by after first fire-retardant for native cellulose, stabilizing treatment, then through coupling processing and the shredding that suspends, 30～90
DEG C being heated to coupling agent sprawls infiltration completely；
(2) 6～18 parts of above-mentioned cellulose, 8～24 parts of modified resin matrix, 3～12 parts of powdered rubber, epoxidised vegetable are taken
3～9 parts of oil, 5～15 parts of friction modifier, 5～15 parts of carbonaceous material, it is that inserts add to 100 parts with barium sulfate, stir in Z-type
Mix in machine and mixed, once, total mixing time rests in 15～18 minutes, and discharging afterwards obtains for rotating conversion in every 3 minutes
Mould pressing powder.
(3) above-mentioned mould pressing powder need to be through preliminary drying, and preliminary drying working procedure parameter is less than 10cm, preliminary drying time 30min for thickness of feed layer,
60～90 DEG C of preliminary drying temperature.
(4) pre-baked mould pressing powder adds in the corresponding die cavity being preheating to 120～160 DEG C according to metering, cure under pressure.
First matched moulds venting 3～6 times in a minute at a slow speed, curing molding under pressurization pressurize 5～10MPa afterwards, hardening time is with system
Depending on part thickness, typically take 1.0～3.0min/mm, the demoulding afterwards obtains cellulose and strengthens the anti-wear-resisting braking of uttering long and high-pitched sounds of non-stick disk
Material.
Beneficial effects of the present invention：
Currently invention addresses native cellulose does reinforcing material, overcome the mineral fibres commonly used at present and crystal whisker materials make
With during the dust that produces or the problem that environment and operator can be adversely affected of abrasive dust.Native cellulose can extract
From animals and plants and mushroom it is also possible to the deep processing such as bagasse, wood leftover material and obtain, use it for wear resistant applications and do sacrifice material
Material, does not have secondary injury to environment.There is the hole of a large amount of various sizes between the fibril of what is more important native cellulose
And capillary space, can be counted as when using as the component braking sheet material that there is the fine of various complexity opening structures
Spongy body, so enable to manufactured brake(-holder) block and there is the effect that non-stick disk is prevented uttering long and high-pitched sounds.Porous kernel crust cladding is pre-
The use of crosslinked rubber powder is also that brake(-holder) block has the major reason that non-stick disk is prevented uttering long and high-pitched sounds.
Brief description
Fig. 1 non-stick disk is prevented uttering long and high-pitched sounds the storage moduluss E ' of wear-resisting brake(-holder) block and fissipation factor tan delta variation with temperature
Under Fig. 2 different load non-stick disk prevent uttering long and high-pitched sounds wear-resisting brake(-holder) block average friction coefficient with retro-speed change curve
Fig. 3 non-stick disk is prevented uttering long and high-pitched sounds the surface topography electromicroscopic photograph after wear-resisting brake(-holder) block friction test
The abrasion rate score comparison diagram of Fig. 4 embodiment 2 brake(-holder) block made with embodiment 1
Specific embodiment
Further illustrate with reference to specific embodiment.
Embodiment 1
Cotton linter proportioning is MgCl2:MgSO4=5:It is little that the solution of 3 3mol/L is passed through ammonia dipping half at 30 DEG C
When, filter and dry the cellulosic fluff obtaining that there is flame retardant effect afterwards；This short flannel is placed in spray in high speed opener
After aluminate coupling agent alcoholic solution, by fluffy short flannel at 80 DEG C blast heating 30min.Take the above-mentioned cotton linter processing
10 parts, and 18 parts of phenol-formaldehyde resin modifieds, floating bead does 6 parts of the powdered rubber that core cortex is precrosslink butadiene-styrene rubber, epoxy soybean oil 6
Part, 5 parts of the flint clay breeze of 300 mesh, 15 parts of carbonaceous material, 40 parts of the blanc fixe of 200 mesh.
Above-mentioned material is mixed in Z-type blender, and once, total mixing time rests in for rotating conversion in every 3 minutes
15 minutes, discharging afterwards obtained mould pressing powder.
In 60 DEG C of mould pressing powder preliminary drying 30min, die-filling cure under pressure molding under 160 DEG C, 10MPa, dwell time 1.5min/
Mm, the demoulding afterwards obtains cellulose and strengthens the anti-wear-resisting brake(-holder) block of uttering long and high-pitched sounds of non-stick disk.
The physical and mechanical property of gained brake(-holder) block is as follows：
DMA (dynamic mechanical test) result of gained brake(-holder) block is as shown in Figure 1：
Average friction coefficient test result under the different initial braking speeds of gained brake(-holder) block is as shown in Figure 2：
The anti-wear-resisting brake(-holder) block of uttering long and high-pitched sounds of non-stick disk carries out noise experiment in LINK1620 testing stand, according to " SAE J2521-
2006 (R) DiSC Brake Dynamometer Squeal Noise Matrix " (Chinese translation SAE J2526 (R) disc type piece
Scream noise matrix with drum-type sheet), the electromagnetism in conjunction with uses such as harbour, wind-powered electricity generation, mine, metallurgy, lifting, lathe, elevators or liquid
The use industrial and mineral of pressure brake, is tested as follows：The initial part (30 times, 100 DEG C of initial temperature) of part 1 test operation, the 5th
Part intermediate regulations and warm-up block (24 times, 100 DEG C and 150 DEG C of initial temperature), (24 times, initial temperature is from 50 for the 7th part slowdown module
DEG C, 100 DEG C, 150 DEG C, 200 DEG C, 250 DEG C, 200 DEG C, 150 DEG C, 100 DEG C and 50 DEG C), result does not all occur higher than 90dB's
Sharp howling.
Non-stick disk prevents the tendency test on fire of wear-resisting brake(-holder) block of uttering long and high-pitched sounds：During 100 DEG C of initial temperature, under brake pressure 0.6MPa,
Keep brake(-holder) block motion linear velocity carry out at least speed regulation experiment of 30min in 25m/s, brake(-holder) block should no on fire, smolder and burn with anger
Magnitude bad phenomenon.
Non-stick disk prevents the non-stick disk test of brake(-holder) block of uttering long and high-pitched sounds：Respectively by brake(-holder) block/nitrogen treatment carbon steel brake disc, braking
Piece/cast steel brake disc, brake(-holder) block/Forging Steel Brake Disc and brake(-holder) block/grey iron brake disc, brake(-holder) block/compacted ink iron material matter brake disc
Occasionally it is dipped into 0.5mol/L saline solution under room temperature, 0.05mol/L dilute hydrochloric acid solution, 0.05mol/L Na to rubbing2CO3In aqueous solution,
Under pressurization 0.6MPa on piece/disk, stand 2 weeks, take out to the even and release that rubs, brake(-holder) block/brake disc applies brake start operating performance
When electric torque, above-mentioned five kinds even combined equal brakeless piece and cement phenomenon with brake disc to rubbing.
Embodiment 2
Carpenter's sawdust crosses 40 mesh sieves, sprays tripolycyanamide-tricresyl phosphate (butoxyethyl group) ester (TBEP) fire retardant weak solution,
Spray flux is carpenter's sawdust amount 10%, then preliminary drying 30min at 80 DEG C, makes non-stick disk with embodiment 1 afterwards and prevents uttering long and high-pitched sounds braking
Piece, the physical and mechanical property of gained brake(-holder) block is as follows：
The abrasion rate score contrast of embodiment 2 brake(-holder) block made with embodiment 1 is as shown in Figure 4：
The anti-non-stick disk test procedure of uttering long and high-pitched sounds of the made brake(-holder) block of embodiment 2 with embodiment 1, same no sharp howling and
No cement the phenomenon of brake disc.
Cited by above example merely to illustrating the material composition of the present invention, the master of preparation technology and products made thereby
Want the innovative point of performance characteristic and the present invention.The technical staff of the industry should know that the present invention is not limited by above-described embodiment
Make, merely illustrating the principles of the invention and its effect, without departing from spirit and scope of the invention described by above-described embodiment
Under the premise of, the present invention also has multiple changes and improvements, and these changes and improvements all cover in scope of the claimed invention
Interior.Claimed scope is defined by the following claims.
Claims (9)
1. a kind of cellulose strengthens the anti-wear-resisting brake material of uttering long and high-pitched sounds of non-stick disk, it is characterized in that, by the raw material of following hundred parts of ratios of weight
Make：Through the cellulose 6～18% of fire-retardant, thermostabilization and its surface treatment, powdered rubber 3～12%, epoxidised vegetable
Oil 3～9%, modified resin matrix 8～24%, friction modifier 5～15%, carbonaceous material 5～15%, remaining is inserts；
Described powdered rubber is butadiene-styrene rubber or nitrile rubber, and its particle size range is 20～800 nm；Described powdered rubber has
Nucleocapsid structure, the floating bead of its core system loose structure or micropore glass powder, epidermal area dip styrene butadiene rubber latex or nitrile rubber
Latex, prewired stoichiometric vulcanizing agent and vulcanization accelerator in latex, after centrifugal spray drying at 140～160 DEG C
After precrosslink.
2. brake material as claimed in claim 1, is characterized in that, described cellulose origin is short in timber, sawdust, Cotton Gossypii, cotton
Floss, wheat straw, Caulis et Folium Oryzae, phragmites communiss, fiber crops, Cortex Mori, bagasse or antibacterial；Fire-retardant, the thermostabilization of described cellulose process the boron adopting
Sour zinc, APP, pyrophosphate, organophosphorus ester, tripolycyanamide-tricresyl phosphate (butoxyethyl group) ester TBEP or contain magnesium salt
Class, wherein, inorganic salts solid constituent can mix pasty state with water and repastes and be layed onto on native cellulose surface, and dehydration afterwards is dried,
Organophosphorus ester or tripolycyanamide-tricresyl phosphate（Butoxyethyl group）Ester TBEP can be sprayed natural on cellulose with its ethanol solution
Dry in the air overflowing to no low volatile；Fire-retardant, stabilizer adding proportion should be the 10～20% of cellulose quality.
3. brake material as claimed in claim 1, is characterized in that, described fire-retardant, thermostabilization process after cellulose table
Face processing method is：Coat 1～3% in cellulose surface（w/w）Coupling agent.
4. brake material as claimed in claim 3, is characterized in that, described coupling agent is silane coupling agent, titanate esters are coupled
Agent, zirconium ester coupling agent or aluminate coupling agent.
5. brake material as claimed in claim 1, is characterized in that, described modified resin matrix, with phenolic resin, melamine tree
Fat, coumarone indene resin, epoxy resin, polyurethane or BMI are raw material, method of modifying be by two kinds of above-mentioned resin or
Two or more blendings or interlaminar resin crosslink formation inierpeneirating network structure or are grafted the active group in above-mentioned resin
Or end-blocking.
6. brake material as claimed in claim 1, is characterized in that, its epoxide number of described epoxidized vegetable oil should be greater than 6.0%,
Iodine number is less than 3%, and flash-point is more than 280 DEG C, and thermal-stable is weightless to be less than 6%.
7. brake material as claimed in claim 1, is characterized in that, described friction modifier is troilite powder, flint clay, zirconium
Ying Fen, gama-alumina or magnesium aluminate spinel, granularity is less than 300 mesh.
8. brake material as claimed in claim 1, is characterized in that, described carbonaceous material is vermicular expanded graphite, scale stone
Ink, active carbon with high specific surface area powder, granular porous coke, nanometer hard carbon black, NACF, single wall or multi-wall carbon nano-tube
Pipe.
9. the cellulose enhancing non-stick disk described in a kind of any one of claim 1-8 prevents the preparation side of wear-resisting brake material that utters long and high-pitched sounds
Method, is characterized in that, comprises the steps：
（1）Cellulose is carried out after fire-retardant, thermostabilization, coupling processing, stand-by；
（2）Take above-mentioned cellulose, powdered rubber, epoxidized vegetable oil, modified resin matrix, friction modifier, carbonaceous material,
Filler kneads, prepared mould pressing powder；
（3）Above-mentioned mould pressing powder need to be after preliminary drying, preheating, and cure under pressure molding obtains final product.
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| CN201510467591.8A CN105038101B (en) | 2015-07-31 | 2015-07-31 | A kind of cellulose strengthens the anti-wear-resisting brake material and preparation method thereof of uttering long and high-pitched sounds of non-stick disk |
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| CN105174973B (en) * | 2015-09-01 | 2018-04-06 | 中山市翔宇汽车零件制造有限公司 | A kind of additive for ceramic frication material raw material mixed process and preparation method thereof |
| CN107492417A (en) * | 2017-08-09 | 2017-12-19 | 安徽杰奥电气有限公司 | A kind of cable anti-wet fiber braiding layer |
| CN108467523A (en) * | 2018-03-09 | 2018-08-31 | 杨春花 | A kind of high-elasticity thermoplastic resin combination and preparation method thereof |
| CN109511058B (en) * | 2018-11-29 | 2021-05-18 | 歌尔股份有限公司 | Amorphous activated carbon particle, sound-absorbing particle and sound-producing device |
| CN110259859A (en) * | 2019-06-03 | 2019-09-20 | 山西中聚晶科半导体有限公司 | A kind of brake block and preparation method thereof using sapphire preparation |
| CN111043201B (en) * | 2019-12-17 | 2022-02-01 | 重庆红宇摩擦制品有限公司 | Automobile brake pad, manufacturing method thereof and material for manufacturing heat insulation layer of automobile brake pad |
| CN113388173B (en) * | 2021-07-02 | 2022-10-11 | 中国铁道科学研究院集团有限公司 | Synthetic friction material and preparation method and application thereof |
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| CN1258050C (en) * | 2004-04-08 | 2006-05-31 | 广西科学院应用物理研究所 | Automotiv non-asbestos high strength braking friction disk, and its prodn. method |
| CN101514252B (en) * | 2009-03-19 | 2011-06-15 | 福州大学 | Whisker composite material for reinforcing automobile brake friction and a method for producing the same |
| CN102191015A (en) * | 2011-04-08 | 2011-09-21 | 复旦大学 | Hybrid fiber reinforced friction material for train braking and preparation method thereof |
| CN104087245A (en) * | 2014-07-01 | 2014-10-08 | 北京瑞斯福高新科技股份有限公司 | Friction material for brake-shoe of heavy axle-load wagon and preparation method of friction material |
| CN104629105B (en) * | 2015-01-27 | 2017-01-11 | 山东大学 | Microcrystalline cellulose reinforced rubber wear-resistant material and preparation method thereof |
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