CN110003854A - A kind of Environment protection type friction material and its preparation process - Google Patents
A kind of Environment protection type friction material and its preparation process Download PDFInfo
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Abstract
The present invention relates to vehicle braking field of material technology, specifically a kind of Environment protection type friction material and its preparation process, it is characterised in that the friction material is made of three kinds of reinforcing material, functional filler, binder materials；Wherein, reinforcing material is ceramic fibre, aramid fiber, glass fibre, potassium titanate crystal whisker, calcium carbonate crystal whisker, functional filler is soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate, vulcanization accelerator, anti-aging agent M, binder is cashew nut oil modified alkyd resin, rubber-based friction particles are prepared by semi-moist mixing method, dry mixed prepares resin/rubber-based mixture, compression moulding, solidification, four steps obtain friction material, with safety and environmental protection, without asbestos, without metal, without carbon black, stability is good, heat resistanceheat resistant degenerative is good, wear rate is smaller, the advantages that low noise.
Description
Technical field
The present invention relates to vehicle braking field of material technology, specifically a kind of safety and environmental protection, without asbestos, without metal,
Without carbon black, stability is good, heat resistanceheat resistant degenerative is good, wear rate is smaller, the Environment protection type friction material and its preparation process of low noise.
Background technique
It is well known that flourishing for Chinese Automobile Industry ', brings rare for Chinese automobile brake block manufacturing enterprise
Opportunity to develop, domestic brake block technical level still have larger gap compared with foreign countries, are especially embodied in novel high-performance environment-friendly type
The development of brake block, therefore, research and development and the production level for improving Environmental Protection in China type brake block are extremely urgent, and state's internal friction materials are matched
All contain copper and other heavy metal raw materials in side mostly, the harmfulness of environment and human body is also increasingly caused to pay close attention to, the U.S.
The 65th article of California environmental law, forbid and limit to use asbestos, copper and heavy metal in clear stipulaties friction material
(lead, mercury, cadmium, Cr VI etc.), carbon black, quartz (crystallization SiO2) etc. require.These substances are in brake block production and use process
In loss will cause water pollution, can have an adverse effect to aquatic animals such as fish, invertebrate, plant, amphibians.Europe
Also evil noxious material contained in brake block is made strict rules in alliance's ECE R90.03 standard.Therefore, friction material is reduced
The component contents such as middle copper and heavy metal, carbon black, research and development without asbestos, without copper, heavy metal free, without the friction material of content of carbon black
International automobile industry development trend is had become, it is to sell to North America and Europe that the product of the brake block export enterprise in China, which has more than half,
Continent market, and the environmental issue of brake block does not cause enough attention at home.For the environmental requirement for adapting to overseas market, state
Outer many well-known friction material producers such as A Ji polo, Bosch, mine-laying is rich etc., has developed no copper ceramic brake.Institute
With with the fast development of China's economy and society and automobile industry, automotive brake pads bring environmental problem will be caused
People more and more pay close attention to, and research and development high-performance, Environment protection type friction material become one of current friction material industry main target.
This several years, in friction material industry, everybody fell over each other to study and prepare various types of NAO formula brake blocks,
In ceramic formula friction material have become the representative and advanced technology developing direction of the advanced formula of Now Domestic.It is advanced at these
Metal sulfide, such as molybdenum disulfide, antimony trisulfide, vulcanized lead are all added in friction material formulation mostly, this is because brake block
At 500 °C or more, the organic matter in friction material understands combustion decomposition, and the decline that will lead to every frictional behaviour is failed, and metal
Sulfide decomposes at high temperature generates oxide, has good anti-flammability, the oxidizing fire of material when can prevent high temperature, to
The decline of frictional behaviour when controlling high temperature, although occurring solving the problems, such as Cu-W ore deposit without copper ceramic frication material now, gold
Belong to sulfide still generally using, other than its potential heavy metal element influences, also as these metal sulfides are close
Degree is big, the market price is expensive, improves the cost of formula.
Summary of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art, provide a kind of safety and environmental protection, without asbestos, without metal,
Without carbon black, stability is good, heat resistanceheat resistant degenerative is good, wear rate is smaller, the Environment protection type friction material and its preparation process of low noise.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of Environment protection type friction material, it is characterised in that the friction material is by three kinds of reinforcing material, functional filler, binder materials
Material forms, and the accounting of each section is reinforcing material 20-35%, functional filler 35-55%, binder in three kinds of materials
5-15%, the sum of three kinds of components are 100%；Wherein, reinforcing material is ceramic fibre, aramid fiber, glass fibre, potassium titanate crystalline substance
Palpus, calcium carbonate crystal whisker, functional filler are soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate, sulphur
Change promotor, anti-aging agent M, binder is cashew nut oil modified alkyd resin.
Ceramic fibre of the present invention, aramid fiber, glass fibre, potassium titanate crystal whisker, calcium carbonate crystal whisker, flexible stone
Ink, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate, vulcanization accelerator, anti-aging agent M, cashew nut oil modified phenolic aldehyde
The weight ratio of resin is followed successively by (7-13): (1-5): (2-6): (3-8): (7-10): (8-14): (6-11): (6-11): (2-
6): (4-9): (14-22): (0.1-0.8): (0.1-0.8): (5-15).
Ceramic fibre of the present invention, aramid fiber, glass fibre, potassium titanate crystal whisker, calcium carbonate crystal whisker, flexible stone
Ink, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate, vulcanization accelerator, anti-aging agent M, cashew nut oil modified phenolic aldehyde
The optimization weight ratio of resin is followed successively by 10:3:4:5:8:10:8:8:4:6:18:0.5:0.5:10.
A kind of preparation process of Environment protection type friction material, it is characterised in that processing step is as follows:
(1) semi-moist mixing method is prepared into rubber-based friction particles: taking calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, silicic acid
Zirconium, barium sulfate, vulcanization accelerator, anti-aging agent M carry out ingredient, preparatory mixing and are crushed, obtain the mixing of rubber-based friction particles
Material；
(2) dry mixed prepares resin/rubber-based mixture: taking ceramic fibre, the aramid fiber, glass fibers in reinforcing fiber
Dimension, takes soft graphite in functional filler, fluorographite, Frication powder, barium sulfate, takes the cashew nut oil modified phenolic aldehyde tree of binder
Rouge takes the rubber-based friction particles being prepared in step (1), carries out ingredient, is then added to plough type batch mixer and is mixed
It closes；
(3) compression moulding: the mixed material in step (2) is added in mold and is carried out using single cylinder one-mode cavity level specific pressure method
Compacting, 20 ± 2Mpa of pressure, 50 ± 10HRS of hardness of product, the dwell time every millimeter of 0.5-1 minutes, 120-140 DEG C of temperature；
(4) solidify: 30 minutes of temperature rise to 120 DEG C from room temperature and are kept for 30 minutes, then rise to from 120 DEG C by 30 minutes
150 DEG C are kept for 1 hour, then are risen to 180 DEG C by 30 minutes from 150 DEG C and kept for 1 hour, then improved from 30 minutes to 200 DEG C and protect
It holds 2 hours, is finally cooled to room temperature, entire curing time 6-8 hours, obtains friction material.
Internal mixing pass in step (1) of the present invention is by calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, silicon
Sour zirconium, barium sulfate, vulcanization accelerator, anti-aging agent M investment are pressurizeed convertible mixer, revolving speed is 30r/min, temperature is 75 DEG C
Lower mixing 20min, from discharge port discharge, the material of discharge cooling and drying at room temperature obtains dried material.
Shattering process in step (1) of the present invention is that material of the mixing after dry is put into crusher, by material
10 mesh are crushed to, the mixed material of rubber-based friction particles is obtained.
Charging sequence in step (2) of the present invention is first by reinforcing fiber ceramic fibre, aramid fiber, glass fibers
Dimension carries out shredding and handles 3 minutes, adds soft graphite, fluorographite, Frication powder, the mixing of rubber-based friction particles 5 minutes, so
Barium sulfate is added afterwards and shuts down stirring knife after cashew nut oil modified alkyd resin mixing 6 minutes, last colter is stirred 4 minutes,
Mixture temperature≤60 DEG C.
Single cylinder one-mode cavity of the present invention refers to that 1 oil cylinder only applies press power, guarantee effect to the mold core of 1 die cavity
Ratio pressure on friction material is constant accurate.
Calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, zirconium silicate, barium sulfate, sulphur in step (1) of the present invention
Change promotor, anti-aging agent M and carries out ingredient according to weight ratio 8:5:6:2:8:0.5:0.5.
Step (2) of the present invention by ceramic fibre, aramid fiber, glass fibre, soft graphite, fluorographite, rub
Crocus, rubber-based friction particles, barium sulfate and cashew nut oil modified alkyd resin are according to weight ratio 10:3:4:10:8:8:30:
10:10 carries out ingredient.
The present invention due to using above-mentioned formula and preparation process, have safety and environmental protection, without asbestos, without metal, without carbon black, steady
The advantages that qualitative good, heat resistanceheat resistant degenerative is good, wear rate is smaller, low noise.
Detailed description of the invention
Fig. 1 is embodiment sample information schematic diagram in the present invention.
Fig. 2 is that embodiment limits substance testing result schematic diagram in the present invention.
Fig. 3 is embodiment asbestos testing result schematic diagram in the present invention.
Fig. 4 is to test in the present invention by SAE J2522-2013, frictional behaviour test result schematic diagram.
Fig. 5 is to test in the present invention by SAE J2521-2013, noise figure 10.0, testing result schematic diagram.
Specific embodiment
The present invention is further described below:
A kind of Environment protection type friction material, it is characterised in that the friction material is by three kinds of reinforcing material, functional filler, binder materials
Material forms, and the accounting of each section is reinforcing material 20-35%, functional filler 35-55%, binder in three kinds of materials
5-15%, the sum of three kinds of components are 100%；Wherein, reinforcing material is ceramic fibre, aramid fiber, glass fibre, potassium titanate crystalline substance
Palpus, calcium carbonate crystal whisker, functional filler are soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate, sulphur
Change promotor, anti-aging agent M, binder is cashew nut oil modified alkyd resin, the ceramic fibre, aramid fiber, glass fibers
Dimension, potassium titanate crystal whisker, calcium carbonate crystal whisker, soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate, vulcanization
Promotor, anti-aging agent M, cashew nut oil modified alkyd resin weight ratio be followed successively by (7-13): (1-5): (2-6): (3-8):
(7-10): (8-14): (6-11): (6-11): (2-6): (4-9): (14-22): (0.1-0.8): (0.1-0.8): (5-15), institute
Ceramic fibre, aramid fiber, glass fibre, potassium titanate crystal whisker, calcium carbonate crystal whisker, soft graphite, the fluorographite, friction stated
The optimization weight of powder, zirconium silicate, nitrile rubber, barium sulfate, vulcanization accelerator, anti-aging agent M, cashew nut oil modified alkyd resin
Ratio is followed successively by 10:3:4:5:8:10:8:8:4:6:18:0.5:0.5:10, and processing step is as follows: (1) semi-moist mixing method preparation
At rubber-based friction particles: taking calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, prevent
Old agent M carries out ingredient, preparatory mixing and is crushed, obtains the mixed material of rubber-based friction particles；(2) dry mixed is prepared
Resin/rubber-based mixture: taking ceramic fibre, aramid fiber, the glass fibre in reinforcing fiber, takes flexible in functional filler
Graphite, fluorographite, Frication powder, barium sulfate take binder cashew nut oil modified alkyd resin, take in step (1) and are prepared
Rubber-based friction particles, carry out ingredient, be then added to plough type batch mixer and mixed, (3) compression moulding: by step
(2) the mixed material in is added in mold to be suppressed using single cylinder one-mode cavity level specific pressure method, 20 ± 2Mpa of pressure, product
50 ± 10HRS of hardness, the dwell time every millimeter of 0.5-1 minutes, 120-140 DEG C of temperature, (4) solidification: 30 minutes of temperature
120 DEG C are risen to from room temperature to be kept for 30 minutes, then are risen to 150 DEG C by 30 minutes from 120 DEG C and kept for 1 hour, then pass through from 150 DEG C
It rises within 30 minutes 180 DEG C to be kept for 1 hour, then improved from 30 minutes to 200 DEG C and kept for 2 hours, be finally cooled to room temperature, it is entire solid
Change time 6-8 hours, obtain friction material, the internal mixing pass in the step (1) is that calcium carbonate crystal whisker, potassium titanate is brilliant
Palpus, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, the convertible mixer of anti-aging agent M investment pressurization, are 30r/ in revolving speed
Min, temperature are mixing 20min at 75 DEG C, and from discharge port discharge, the material of discharge cooling and drying at room temperature obtains dried object
To expect, the shattering process in the step (1) is that material of the mixing after dry is put into crusher, 10 mesh are crushed material to,
Obtain the mixed material of rubber-based friction particles, the charging sequence in the step (2) be first by reinforcing fiber ceramic fibre,
Aramid fiber, glass fibre carry out shredding and handle 3 minutes, add soft graphite, fluorographite, Frication powder, rubber-based friction
Particle mixes 5 minutes, and barium sulfate is then added and shuts down stirring knife, most rear plough after cashew nut oil modified alkyd resin mixing 6 minutes
Knife is stirred 4 minutes, mixture temperature≤60 DEG C, and the single cylinder one-mode cavity refers to 1 oil cylinder only to 1 die cavity
Mold core applies press power, and ratio pressure of the guarantee effect on friction material is constant accurate, calcium carbonate crystal whisker in the step (1),
Potassium titanate crystal whisker, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, anti-aging agent M are according to weight ratio 8:5:6:2:8:0.5:
0.5 carries out ingredient, and the step (2) is by ceramic fibre, aramid fiber, glass fibre, soft graphite, fluorographite, friction
Powder, rubber-based friction particles, barium sulfate and cashew nut oil modified alkyd resin are according to weight ratio 10:3:4:10:8:8:30:10:
10 carry out ingredient, and the present invention starts with from the angle of environmental protection, safety and the reasonable employment energy and material, and copper can be substituted completely by developing
With the substitute of metal sulfide, no longer add metal sulfide in formula, prepared without asbestos, without metal, without carbon black
Environment-friendly ceramic be formulated brake block, this is a great breakthrough, which not only fully meets the requirement of national standard, and
The environmental requirement for meeting California, USA 65, European Union ECE R90.03 also has one with currently used domestic and international product comparison
Fixed advantage has good stability and heat resistanceheat resistant degenerative, and wear rate is smaller, low noise.
Core of the invention technology is exactly to select metal sulfide, carbon black on the basis of friction material with copper-free ceramic formula
Deng alternative materials: 1, in friction material with copper-free ceramic formula, according to red copper fiber properties and effect, design is by ceramic fine
Dimension, aramid fiber, glass fibre etc. be a variety of inorganic and organic fiber composition assorted fibre is reinforcing material, with potassium titanate crystal whisker and
Highly thermally conductive soft graphite substitutes red copper fiber, plays humidification identical with red copper fiber and heating conduction；2, metal sulphur
The feature of compound such as molybdenum disulfide, antimony trisulfide, vulcanized lead etc. is that it is main to be used for friction material with good lubricating properties, anti-flammability
Antifriction when function is low temperature increases when high temperature and rubs, and loss on ignition is small, not volatile in friction material.Low temperature antifriction is due to metal
Sulfide hardness is small, coefficient of friction is small；It is that oxide (oxidation can be generated when friction material rubs high-temperature brake that high temperature increasing, which rubs,
Molybdenum, antimony oxide), coefficient of friction can be increased, reduce heat fading, for the characteristic and effect of metal sulfide, select calcium carbonate brilliant
It must be its alternative materials with fluorographite.Calcium carbonate crystal whisker is monocrystal material, and thermal decomposition temperature is 640 °C, and use process is not
Will cause pollution, belong to ep-type material, have good physical property, mechanical property, heat resistanceheat resistant decline with hot restorability compared with
Good, higher wearability, especially high temperature friction and wear behavior are superior, therefore friction factor changes very under middle high braked speed
Steadily, the layer structure of this high temperature heat fading for efficiently solving the problems, such as friction material, fluorographite is big by bond energy and polarity is small
C-F functional group constitute, surface can and single layer between active force it is small, thus be a kind of excellent solid lubricant, better than logical
Graphite and molybdenum disulfide of Chang Suoyong etc., in drying or humid air and at high temperature (400-500 °C), its friction system
Number all very littles, wear-resisting and long service life.Since fluorographite surface can be low, can make in conjunction with resin, rubber, other lubricants
With.In addition fluorographite also has preferable thermal conductivity, therefore, calcium carbonate crystal whisker and the completely alternative metal vulcanization of fluorographite
The effect of object and copper in friction material, and friction material apparent volume increases, density reduces after its substitution, cost decline；
3, calcium carbonate crystal whisker dispersibility is poor, and content increase easily causes reunion, reduces, is caused in material with the binding performance of binder
Portion's porosity increases, so that tensile strength and impact strength be made to reduce.For this purpose, by improve calcium carbonate crystal whisker surface wettability come
Improve the mechanical property of friction material.Semi-moist banburying process is mainly used, by calcium carbonate crystal whisker and the preparatory mixing of nitrile rubber
It is prepared into Rubber base friction material, is then then added in ceramic formula system and is mixed with out resin/Rubber base friction material.
As calcium carbonate crystal whisker additive amount increases, the abrasion loss of Rubber base friction material is in be decreased obviously trend；High calcium carbonate crystal whisker
Content will lead to the reduction of resin-matrix friction material global density, and degree of porosity is suitable for, and stomata exists to Organic Ingredients such as rubber, resins
The molecule decomposited under high temperature has suction-operated, in addition calcium carbonate crystal whisker strength and stability with higher itself, and makes
Resin/Rubber base friction material abrasion loss of formation is reduced as calcium carbonate crystal whisker content increases.
Embodiment
A kind of Environment protection type friction material, it is characterised in that the friction material is by reinforcing material, functional filler, binder three
Kind material forms, and the accounting of each section is reinforcing material 20-35%, functional filler 35-55%, glues in three kinds of materials
Agent 5-15% is tied, the sum of three kinds of components are 100%；Wherein, reinforcing material is ceramic fibre, aramid fiber, glass fibre, metatitanic acid
Potassium whisker, calcium carbonate crystal whisker, functional filler are soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, sulfuric acid
Barium, vulcanization accelerator, anti-aging agent M, binder are cashew nut oil modified alkyd resin, the ceramic fibre, aramid fiber, glass
Glass fiber, potassium titanate crystal whisker, calcium carbonate crystal whisker, soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate,
Vulcanization accelerator, anti-aging agent M, cashew nut oil modified alkyd resin weight ratio be followed successively by 10:3:4:5:8:10:8:8:4:6:
18:0.5:0.5:10, processing step are as follows: (1) semi-moist mixing method is prepared into rubber-based friction particles: taking calcium carbonate crystal whisker, titanium
Sour potassium whisker, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, anti-aging agent M carry out ingredient, preparatory mixing and are crushed, close
Refining process is to put into calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, anti-aging agent M
Pressurize convertible mixer, and calcium carbonate crystal whisker, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, is prevented always potassium titanate crystal whisker
The weight ratio 8:5:6:2:8:0.5:0.5 of agent M, the mixing 20min in the case where revolving speed is 30r/min, temperature is 75 DEG C are arranged from discharge port
Material, the material of discharge cooling and drying at room temperature obtain dried material, and shattering process is to be put into brokenly material of the mixing after dry
Broken machine crushes material to 10 mesh, obtains the mixed material of rubber-based friction particles；(2) dry mixed prepares resin/rubber
Base mixture: taking ceramic fibre, aramid fiber, the glass fibre in reinforcing fiber, takes soft graphite in functional filler, fluorination
Graphite, Frication powder, barium sulfate take binder cashew nut oil modified alkyd resin, and the rubber-based being prepared in step (1) is taken to rub
Particle is wiped, carries out ingredient, ceramic fibre, aramid fiber, glass fibre, soft graphite, fluorographite, Frication powder, rubber-based are rubbed
The weight ratio 10:3:4:10:8:8:30:10:10 of particle, barium sulfate and cashew nut oil modified alkyd resin is wiped, charging sequence is
Reinforcing fiber ceramic fibre, aramid fiber, glass fibre are first carried out shredding to handle 3 minutes, add soft graphite, fluorination stone
Ink, Frication powder, rubber-based friction particles mix 5 minutes, and barium sulfate is then added and cashew nut oil modified alkyd resin mixes 6 points
Stirring knife is shut down after clock, last colter is stirred 4 minutes, mixture temperature≤60 DEG C, (3) compression moulding: by step (2)
In mixed material be added in mold and suppressed using single cylinder one-mode cavity level specific pressure method, the single cylinder one-mode cavity refers to
1 oil cylinder only applies press power to the mold core of 1 die cavity, and ratio pressure of the guarantee effect on friction material is constant accurate, pressure 20
± 2Mpa, 50 ± 10HRS of hardness of product, the dwell time every millimeter of 0.5-1 minutes, 120-140 DEG C of temperature, (4) solidification: temperature
30 minutes rise to 120 DEG C from room temperature and are kept for 30 minutes, then rise to 150 DEG C by 30 minutes from 120 DEG C and kept for 1 hour, then
180 DEG C were risen to by 30 minutes from 150 DEG C to be kept for 1 hour, then improved from 30 minutes to 200 DEG C and is kept for 2 hours, were finally cooled to
Room temperature entire curing time 6-8 hours, obtains friction material.
Above-mentioned friction material is detected
(1) asbestos and heavy metal etc. limit substance detection
Product of the present invention specifies Shanghai Huace Brand Mark Detection Technology Co., Ltd., the third-party institution through client, according to customer requirement,
With poisonous and harmful substance content in XRF analysis sample, according to GB/T23263-2009, QC/T941-2013, QC/T942-2013,
QC/T943-2013, QC/T944-2013 standard detection, asbestos, lead (Pb), Cr VI (Cr), mercury (Hg), cadmium in test sample
(Cd), poisonous and harmful substances, the testing result such as polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs) are as follows:
A. sample message: as shown in Fig. 1.
Limit substance testing result: as shown in Fig. 2.
Asbestos testing result: as shown in Fig. 3.
3 testing results can be determined that with reference to the accompanying drawings, and product of the present invention is without asbestos, lead, Cr VI, mercury, cadmium, more bromines connection
The poisonous and harmful substances such as benzene, polybrominated diphenyl ethers.
(2) LINK3900 inertia brake NVH(noise) bed stand test
1. testing by SAE J2522-2013, frictional behaviour test result is as shown in Fig. 4.
As can be seen that product of the present invention stable friction performance, nominal coefficient of friction are 0.37 from 4 examining report of attached drawing,
Coefficient of friction is 0.38 under 120Km speed, and the primary coefficient of friction that fails is 0.23, and double-dip recession coefficient of friction is 0.30, completely
It can satisfy AK-Master standard requirements and customer requirement.
2. testing by SAE J2521-2013, noise figure 10.0, specific testing result is as shown in Fig. 5.
(3) 40,000 yuan/ton of market price of the alternative materials that the present invention is developed, and the price of copper product is 60,000 yuan/ton, gold
It is expensive to belong to sulfide, 50,000 yuan/ton of antimony trisulfide, 200,000 yuan/ton of molybdenum disulfide.Therefore the use of the alternative materials, Ke Yi great
Width reduces the production cost of brake block, under the premise of guaranteeing braking ability, meets requirement of the American-European countries to environmental protection.
The present invention can make up the blank of domestic and international market, provide the production of environmental protection of high quality and at a reasonable price for domestic automobile manufacturer
Product, while the developed countries such as America and Europe that the brake block can also export to limit copper and heavy metal uses.
Claims (10)
1. a kind of Environment protection type friction material, it is characterised in that the friction material is by reinforcing material, functional filler, three kinds of binder
Material forms, and the accounting of each section is reinforcing material 20-35%, functional filler 35-55%, bonds in three kinds of materials
Agent 5-15%, the sum of three kinds of components are 100%；Wherein, reinforcing material is ceramic fibre, aramid fiber, glass fibre, potassium titanate
Whisker, calcium carbonate crystal whisker, functional filler be soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, barium sulfate,
Vulcanization accelerator, anti-aging agent M, binder are cashew nut oil modified alkyd resin.
2. a kind of Environment protection type friction material according to claim 1, it is characterised in that the ceramic fibre, aramid fiber are fine
Dimension, glass fibre, potassium titanate crystal whisker, calcium carbonate crystal whisker, soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, sulphur
Sour barium, vulcanization accelerator, anti-aging agent M, cashew nut oil modified alkyd resin weight ratio be followed successively by (7-13): (1-5): (2-
6): (3-8): (7-10): (8-14): (6-11): (6-11): (2-6): (4-9): (14-22): (0.1-0.8): (0.1-0.8):
(5-15).
3. a kind of Environment protection type friction material according to claim 2, it is characterised in that the ceramic fibre, aramid fiber are fine
Dimension, glass fibre, potassium titanate crystal whisker, calcium carbonate crystal whisker, soft graphite, fluorographite, Frication powder, zirconium silicate, nitrile rubber, sulphur
Sour barium, vulcanization accelerator, anti-aging agent M, cashew nut oil modified alkyd resin optimization weight ratio be followed successively by 10:3:4:5:8:
10:8:8:4:6:18:0.5:0.5:10.
4. a kind of preparation process of Environment protection type friction material, it is characterised in that processing step is as follows:
(1) semi-moist mixing method is prepared into rubber-based friction particles: taking calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, silicic acid
Zirconium, barium sulfate, vulcanization accelerator, anti-aging agent M carry out ingredient, preparatory mixing and are crushed, obtain the mixing of rubber-based friction particles
Material；
(2) dry mixed prepares resin/rubber-based mixture: taking ceramic fibre, the aramid fiber, glass fibers in reinforcing fiber
Dimension, takes soft graphite in functional filler, fluorographite, Frication powder, barium sulfate, takes the cashew nut oil modified phenolic aldehyde tree of binder
Rouge takes the rubber-based friction particles being prepared in step (1), carries out ingredient, is then added to plough type batch mixer and is mixed
It closes；
(3) compression moulding: the mixed material in step (2) is added in mold and is carried out using single cylinder one-mode cavity level specific pressure method
Compacting, 20 ± 2Mpa of pressure, 50 ± 10HRS of hardness of product, the dwell time every millimeter of 0.5-1 minutes, 120-140 DEG C of temperature；
(4) solidify: 30 minutes of temperature rise to 120 DEG C from room temperature and are kept for 30 minutes, then rise to from 120 DEG C by 30 minutes
150 DEG C are kept for 1 hour, then are risen to 180 DEG C by 30 minutes from 150 DEG C and kept for 1 hour, then improved from 30 minutes to 200 DEG C and protect
It holds 2 hours, is finally cooled to room temperature, entire curing time 6-8 hours, obtains friction material.
5. a kind of preparation process of Environment protection type friction material according to claim 4, it is characterised in that the step (1)
In internal mixing pass be by calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, anti-old
Agent M investment is pressurizeed convertible mixer, the mixing 20min in the case where revolving speed is 30r/min, temperature is 75 DEG C, from discharge port discharge,
The material of discharge cooling and drying at room temperature, obtains dried material.
6. a kind of preparation process of Environment protection type friction material according to claim 4, it is characterised in that the step (1)
In shattering process be that material of the mixing after dry is put into crusher, crush material to 10 mesh, obtain rubber-based friction
The mixed material of grain.
7. a kind of preparation process of Environment protection type friction material according to claim 4, it is characterised in that the step (2)
In charging sequence be first by reinforcing fiber ceramic fibre, aramid fiber, glass fibre carry out shredding handle 3 minutes, add
Soft graphite, fluorographite, Frication powder, rubber-based friction particles mix 5 minutes, and barium sulfate and cashew nut oil modified is then added
Phenolic resin shuts down stirring knife after mixing 6 minutes, and last colter is stirred 4 minutes, mixture temperature≤60 DEG C.
8. a kind of preparation process of Environment protection type friction material according to claim 4, it is characterised in that the single cylinder list
Die cavity refers to that 1 oil cylinder only applies press power to the mold core of 1 die cavity, and ratio of the guarantee effect on friction material presses constant essence
Really.
9. a kind of preparation process of Environment protection type friction material according to claim 4, it is characterised in that the step (1)
Middle calcium carbonate crystal whisker, potassium titanate crystal whisker, nitrile rubber, zirconium silicate, barium sulfate, vulcanization accelerator, anti-aging agent M are according to weight ratio 8:
5:6:2:8:0.5:0.5 carries out ingredient.
10. a kind of preparation process of Environment protection type friction material according to claim 4, it is characterised in that the step
(2) by ceramic fibre, aramid fiber, glass fibre, soft graphite, fluorographite, Frication powder, rubber-based friction particles, sulfuric acid
Barium and cashew nut oil modified alkyd resin are according to weight ratio 10:3:4:10:8:8:30:10:10 progress ingredient.
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| CN116496078A (en) * | 2023-04-12 | 2023-07-28 | 上海新倬壮印刷科技有限公司 | Screen coating material and preparation method thereof |
| WO2024052750A1 (en) * | 2022-09-08 | 2024-03-14 | Gharda Chemicals Limited | Friction material composition and fabricating articles therefrom |
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