CN103351574A - Method for preparing short fiber reinforced friction material through adopting long fibers - Google Patents
Method for preparing short fiber reinforced friction material through adopting long fibers Download PDFInfo
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- CN103351574A CN103351574A CN201310216813XA CN201310216813A CN103351574A CN 103351574 A CN103351574 A CN 103351574A CN 201310216813X A CN201310216813X A CN 201310216813XA CN 201310216813 A CN201310216813 A CN 201310216813A CN 103351574 A CN103351574 A CN 103351574A
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Abstract
The invention discloses a method for preparing a short fiber reinforced friction material through adopting long fibers. The method comprises the following steps: kneading and mixing a long-threaded or mixed-threaded fiber material, a phenolic resin, a filler, other easy-dispersion short fibers and rubber, fracturing the long-threaded or mixed-threaded fiber material into short fibers, and cladding the short fibers by a mixture comprising the phenolic resin, the filler and rubber to form a wet mixture; crushing the wet mixture to form a particulate wet mixture; mixing one or more different formulas of the particulate wet mixture, the powdery phenolic resin, the filler and the other easy-dispersion short fibers in a mixer to prepare a mold press material; and processing the mold press material to prepare a braking friction material or a chenille product clutch surface patch friction material, wherein the friction material has a heterogeneous structure. The method allows the high-performance heterogeneous friction material satisfying various segmentation requirements to be prepared by directly using the long fibers as a raw material without a drying technology, so the production cost is greatly reduced.
Description
Technical field
The present invention relates to the manufacture method of a kind of brake friction material or chenille article clutch surface friction materials, specifically a kind of macrofiber that adopts is made the method that staple fibre strengthens friction materials.
Background technology
At present, the manufacturing main flow mixing procedure of friction materials is the dry method batch mixing both at home and abroad, be about to phenol-formaldehyde resin powder, rubber powder, staple fibre, filler and frictional property regulator and in dry mixing device, stir, the material after the dry mixed is directly used in the preparation friction materials.This technique must be used staple fibre, and when staple length surpassed 3～4.5mm, fiber was difficult for disperseing, and meeting conglomeration balling-up, has a strong impact on the quality of friction materials.Publication number be the United States Patent (USP) of US20040164438 to disclose a kind of length that adopts be the create friction method of material of the fiber of 2～15mm, the method adopts the mixing water slurry impregnation of fibers material of resin and filler, with pressure water is extruded and is carried out drying.This processing method efficient is lower, and is not suitable for the fiber that length surpasses 15mm.The publication number that the applicant proposes is that the CN1724246A Chinese invention patent application discloses a kind of method that adopts the glasscloth scrap stock to make moulding compound, but this patent is only for the glasscloth scrap stock, long filament shape or sleave shape filamentary material are not mentioned that as the starting material of friction materials the friction materials that has non-homogeneous structure for preparation does not relate to yet.
The prepared friction materials of dry method batch mixing is called heterogeneous materials, the method depends on formulating of recipe very much, and its shortcoming is: if do not adopt high-grade starting material or formulating of recipe incorrect in the prescription, the frictional coefficient of material is just unstable, wearing and tearing are large, and heat fading easily occurs.So the method depends on formulating of recipe very much.Current, the development trend of friction materials is the internal structure design that is risen to material by traditional material prescription design, namely adopt agglomeration technique to make material become particulate state, make the friction materials of preparation have certain non-homogeneous structure, thereby effectively control density, void content, compressibility, natural frequency, comfort level of friction materials etc.Existing friction materials granulating technology mainly is divided into two kinds: (1) adopts Banbury mixer, mill batch mixing, and with grade grinder or dicing machine granulation, it is starting material that the method can adopt solid rubber again, but manufacturing cost is too high.(2) adopt water or the water-sol (such as honey) carrying out granulation without the pressure mixer, the particle of the method preparation, water content is higher then to need to carry out drying and curing, the low extruder grain that then needs of water content.Above-mentioned agglomeration technique has the following disadvantages: (1) is not suitable for adopting macrofiber is starting material; (2) manufacturing cost of the first agglomeration technique is too high; (3) the second agglomeration technique is to only carrying out dry technique, and particle is comparatively loose frangible, and is little to improving the material internal structure function; To carrying out simultaneously technique dry and that solidify, not firm through partly solidified particle surface and resin-bonded although granule strength is higher, can in material, form weak interface, under bad working environments, weak interface is easy to crack; To extruder grain technique, lower water content also can affect the performance of material, and is larger even 1% water content also can make the wearing and tearing of material increase, and under bad working environments, the moisture in the material at high temperature sharply expands, and can cause the material cracking.In addition, above-mentioned technological method does not relate to the Particle Phase combination with different ingredients and different performance yet, and preparation has the method for non-homogeneous structure material.Although can the forming section non-homogeneous structure when particulate material that adds in the dry method batch mixing is no more than 30%, material of main part or equal phase structures; Surpass 30% such as the particulate material add-on, material very easily ftractures in bad working environments.
At present, regular macrofiber is processed into staple fibre and has had ripe technique.But in industrial production, also can produce a large amount of fiber sleaves, such as carbon fiber sleave, glass fibre sleave, synthon sleave, flaxen fiber tankage sleave, these sleaves are processed into the staple fibre that is suitable for the friction materials use, tooling cost is high.If but with the starting material of these sleaves as the friction materials use, be a kind of manufacturing technology of resource-conserving.In addition, if can with some long filament shape filamentary material such as rock wool, directly as the friction materials of staple fibre enhancing, also can reduce the cost of staple fiber.
Summary of the invention
Technical problem to be solved by this invention be to propose a kind of can be directly take macrofiber as raw material, effectively apply materials internal structure design concept produces the method for the employing macrofiber manufacturing staple fibre enhancing friction materials of the heterogeneous friction materials of high-performance that satisfies various segmentation requirements, it can be with the macrofiber sleave for the manufacture of friction materials, do not need to adopt drying process, can significantly reduce production costs.
For solving the problems of the technologies described above, the present invention adopt macrofiber make method that staple fibre strengthens friction materials comprise the steps: (1) with kneader as material by wet type mixing equipment, with water or solvent as treating compound, with long filament shape or sleave shape filamentary material and resol, filler, the staple fibre that other easily disperses and rubber are mediated and are mixed, extruding at kneader, under shearing and the tearing effect, and under the cutting action of filler, described long filament shape or sleave shape filamentary material are broken into the staple fibre that reaches specified requirement, staple fibre is again by described resol, the mixture of filler and rubber coats, and becomes with the wet mixed feed of fibrous particle with different big or small bulk particles; (2) adopt pulverizer to pulverize described wet mixed feed, become the particle wet mixed feed; (3) described particle wet mixed feed and powder resol, filler, other staple fibre that easily disperses with one or more different ingredients mixes in mixer, makes molding compound; (4) adopt mould pressing process, described molding compound is made brake friction material or chenille article clutch surface friction materials, make above-mentioned friction materials have non-homogeneous structure.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and the weight proportion scope is 5～35:8～20:30～60:2～10:2～18 between described long filament shape or sleave shape filamentary material, resol, filler, other staple fibre that easily disperses and the rubber.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and when adopting pulverizer to pulverize described wet mixed feed, the granular size after the pulverizing is controlled at and makes 80%～95% described particle wet mixed feed can pass through 2～10 purpose screen clothes.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and the weight content that described particle wet mixed feed accounts for described molding compound is 30%～95%.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described kneader is with clamping device and vacuum unit; During described kneader work, adopt steam that described kneader is heated, the temperature of material in the described kneader can be regulated in 60～130 ℃ of scopes, by regulating temperature and vacuum tightness, control the moisture of described wet mixed feed; The screen cloth of described pulverizer has rectangular opening, and rectangular opening length is 10～20mm, and width is 1～3mm, by the control rectangle hole dimension to control the size distribution of described particle wet mixed feed; Described mixer is high speed mixer, plough type mixer or helical-ribbon type mixer.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described long filament shape or sleave shape filamentary material are one or more the combination in glass fibre, rock wool fibers, carbon fiber, PAN-based stabilized fiber, synthon, the native cellulose fibre.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, the various fibre weight content that form described long filament shape or sleave shape filamentary material are: glass fibre 2～70%, rock wool fibers 5～80%, carbon fiber 2～30%, PAN-based stabilized fiber 2～15%, synthon 2～15%, native cellulose fibre 2～20%.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described glass fibre is above sleave and glasscloth scrap stock of length 20mm; Described rock wool fibers is the above rock wool of length 100mm; Described carbon fiber is above sleave and carbon cloth scrap stock of length 20mm; Described PAN-based stabilized fiber is the sleave of length more than 20mm; Described synthon are the recycled fiber sleave of all lengths; Described recycled fiber sleave be the acrylic fibers weight content at the sleave more than 75%, or the terylene weight content is at the sleave more than 75%, or acrylic fibers and terylene the two add up to weight content at the sleave more than 75%; Described native cellulose fibre is for reclaiming cotton and flaxen fiber tankage.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described solvent is methyl alcohol or ethanol, and the part by weight of material is 2～8:100 in described water or solvent and the described kneader.Add entry or solvent, help the infiltration of filler, fiber and resin, reduce the dust of working space, but and the effect of super fatting agent, reduce the resistance of kneader.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described resol is liquid thermoset resol, and its technical indicator is: solid content 75～80%, viscosity 1500～10000mPas under 25 ℃ of conditions.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described resol is solid thermoplastics resol, and its technical indicator is: polymerization velocity 60～200 seconds, and the weight content of free phenol is less than 3%; When adding described resol, need to add hexamethylenetetramine, it adds weight is 6～12% of described resol.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described resol is solid thermoplastics resol, and its technical indicator is: polymerization velocity 80～110 seconds, the weight content of free phenol be less than 2%, 90～105 ℃ of softening temperatures; When adding described resol, need to add hexamethylenetetramine, it adds weight is 8～10% of described resol.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and described rubber is unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR), or is powdered rubber, and described powdered rubber is acrylonitrile-butadiene rubber powder or tyre talc; When adding described unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR), need add simultaneously vulcanizing agent, promotor and anti-aging agent.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, described filler is the combination of material more than five kinds in chromite powder, troilite powder, powdered iron ore, barite, barium sulfate, calcium carbonate, Feldspar Powder, aluminum oxide, silicon carbide, synthetic graphite, crystalline flake graphite, micro crystal graphite, refinery coke, friction powder, antimony sulfide, molybdenumdisulphide, reduced iron powder, the diatomite, and determines combination matching according to tribology principle, engineering experience and test method.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, described staple fibre that other easily disperses be steel fiber, copper fiber, asbestos, short glass fiber, rock wool fibers, aramid pulp and conjugated fibre is a kind of or several combinations.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, described rubber is powdered rubber, its reinforced order is as follows when kneading and mixing: add first described filler and powdered rubber, then add described resol, add again described water or solvent, start described kneader, progressively add described long filament shape or sleave shape filamentary material; During described kneader work, adopt steam that kneader is heated, the top temperature of material in the kneader is controlled in 80～100 ℃ of scopes, by regulating temperature and vacuum tightness, control the water content of described particle wet mixed feed; The time that material is mediated in described kneader is 1～3 hour; When described long filament shape or sleave shape filamentary material become the staple fibre that reaches specified requirement, get final product discharging.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, described resol is described solid thermoplastics resol, described rubber is unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR), its reinforced order is as follows when kneading and mixing: add first described filler, then add described solid thermoplastics resol, add again described water or solvent, start described kneader, progressively add described unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR) and described long filament shape or sleave shape filamentary material, after described unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR) and described solid thermoplastics resol fully mix, add vulcanizing agent, promotor, anti-aging agent and hexamethylenetetramine; Before adding described hexamethylenetetramine, the top temperature of material is 100～120 ℃ in the described kneader; After adding described hexamethylenetetramine, the top temperature of material is 90～105 ℃ in the described kneader; Described vulcanizing agent, promotor, anti-aging agent and hexamethylenetetramine and other material are mediated evenly, when described long filament shape or sleave shape filamentary material become the staple fibre that reaches specified requirement, get final product discharging.
Above-mentioned employing macrofiber is made the method that staple fibre strengthens friction materials, and the staple fibre of described specified requirement refers to account for the length of fiber of total amount 80～90% all less than 20 millimeters.
The present invention is owing to adopted technique scheme, it directly adopts macrofiber (long filament shape or sleave shape filamentary material) to make staple fibre enhancing friction materials, make the macrofiber sleave can be used for the material that creates friction, realized the theory of recycling economy is used for the manufacturing target of friction materials, and significantly reduced production cost.It has remedied the deficiency that exists in the existing heterogeneous friction materials manufacturing technology, and effectively the theory of apply materials internal structure design can produce the heterogeneous friction materials of the high-performance that satisfies various segmentation requirements.In addition, the combination process that the present invention has adopted the heating kneading to vacuumize prepares particulate material, can strictly control the moisture of particulate material, does not need to adopt drying process, has saved energy consumption.
Embodiment
Embodiment 1 adopts two kinds of wet mixed feed of L1-A, L1-B to make staple fibre enhancing friction materials.
1.L1-A the preparation of wet mixed feed.It is as shown in the table to fill a prescription.
| Composition | Weight ratio | Composition | Weight ratio |
| Liquid thermoset resol | 14 | The glasscloth scrap stock | 15 |
| The carbon fiber sleave | 3 | Reclaim acrylic fibers | 2 |
| The rock wool long filament | 10 | Reclaim cotton | 2 |
| Refinery coke (20 order) | 10 | Micro crystal graphite | 6 |
| Chromite powder | 5 | Troilite powder | 12 |
| Nitrile rubber powder | 3 | Tyre talc | 2 |
| Water-ground limestone | 6 | Crystalline flake graphite | 4 |
| Water (treating compound) | 3 | Steel fiber | 6 |
The technical indicator of liquid thermoset resol
| Solid content (%) | Viscosity (25 ℃) (mPas) |
| 78 | 6100 |
With crystalline flake graphite, refinery coke, micro crystal graphite, chromite powder, troilite powder, nitrile rubber powder, tyre talc, water-ground limestone, steel fiber, liquid thermoset resol and water add kneader in upper table ratio, open kneader and mediate oar and steam heater, progressively add the rock wool long filament, reclaim acrylic fibers, reclaim cotton, carbon fiber sleave and glasscloth scrap stock, mediated 30～40 minutes, when temperature is raised to 90 ℃, the steam off heating unit, starting vacuum pump vacuumizes kneading machine, vacuum tightness maintains the 300mm mercury column, continue to mediate, until fiber meets the requirements of length, get final product discharging.Adopt pulverizer that the L1-A wet mixed feed is crushed to following fineness: the 4 order amounts of sieving are greater than 85%.
2.L1-B the preparation of wet mixed feed.It is as shown in the table to fill a prescription.
Cashew nut oil melamine modified phenolic resin technical indicator
| Softening temperature (℃) | Free phenol (%) | Polymerization velocity (second) |
| 102 | 1.5 | 80 |
With the cashew nut oil melamine modified phenolic resin, carbon black, powdered iron ore, synthetic graphite, chromite powder, water-ground limestone, ceramic fiber, aluminum oxide, refinery coke and water add kneader in upper table ratio, open kneader and mediate oar and steam heater, progressively add solid nitrile rubber, reclaim acrylic fibers, the rock wool long filament, carbon fiber sleave and glass fibre sleave, mediated 30～40 minutes, when temperature is raised to 110 ℃, the steam off heating unit, when solid nitrile rubber and other material fully dissolve each other, reduce the temperature to 90 ℃, add Vulcanization accelerator TMTD, anti-aging agent RD, Sulfur and hexamethylenetetramine, continue to mediate, until fiber meets the requirements of length, get final product discharging.Adopt pulverizer that the L1-B wet mixed feed is crushed to following fineness: the 8 order amounts of sieving are greater than 85%.
3.L1 the preparation of molding compound.It is as shown in the table to fill a prescription.Starting material in the following table and particle wet mixed feed adding high speed mixer are stirred, namely become molding compound.
L1 molding compound prescription
| Composition | Weight ratio | Composition | Weight ratio |
| Powder resol | 7 | Steel fiber | 10 |
| The L1-A wet mixed feed | 40 | The L1-B wet mixed feed | 20 |
| Troilite powder | 4 | Synthetic graphite | 3 |
| Refinery coke | 3 | Powdered iron ore | 2 |
| Chromite powder | 2 | Conjugated fibre | 6 |
| Short glass fiber | 3 | ? | ? |
Powder phenolic resins index
| Stream is apart from (mm) | Free phenol (%) | Polymerization velocity (second) |
| 32 | 1.2 | 78 |
The molding compound that mixes delivered on the press suppress.Die temperature is 165 ℃ during compacting, and pressure is 20Mpa, and the dwell time is 15 minutes.Baking oven is sent in the moulding that suppresses, heat-treated.Heat-treat condition, 140 ℃ begin to heat up, and per hour heat up 10 ℃, and 180 ℃ are incubated 6 hours, furnace cooling.Can obtain without asbestos drum-type brake pad work in-process.
Adopt GB5763-2008 standard method test, performance is as follows:
Shock strength (J/cm
2): 0.42.
Embodiment 2 adopts two kinds of wet mixed feed of L2-A, L2-B to make staple fibre enhancing friction materials.
1.L2-A the preparation of wet mixed feed.It is as shown in the table to fill a prescription.
| Composition | Weight ratio | Composition | Weight ratio |
| Solid thermoplastics resol | 10 | Hexamethylenetetramine | 1 |
| The PAN-based stabilized fiber sleave | 2 | The carbon fiber sleave | 10 |
| Aramid fiber | 2 | The glass fibre sleave | 10 |
| The rock wool long filament | 10 | Barium sulfate | 10 |
| Refinery coke (20 order) | 12 | Synthetic graphite | 6 |
| Crystalline flake graphite | 5 | Nitrile rubber powder | 3 |
| Chromite powder | 7 | Troilite powder | 12 |
| Water (treating compound) | 6 | ? | ? |
Solid thermoplastics phenolic resins index
| Softening temperature (℃) | Free phenol (%) | Polymerization velocity (second) |
| 95 | 1.3 | 101 |
With solid thermoplastics resol, hexamethylenetetramine, barium sulfate, refinery coke, synthetic graphite, crystalline flake graphite, nitrile rubber powder, chromite powder, troilite powder, aramid fiber and water add kneader in upper table ratio, open kneader and mediate oar and steam heater, progressively add the rock wool long filament, the glass fibre sleave, PAN-based stabilized fiber sleave and carbon fiber sleave, mediated 40～60 minutes, when temperature is raised to 90 ℃, the steam off heating unit, starting vacuum pump vacuumizes kneading machine, vacuum tightness maintains the 300mm mercury column, continue to mediate, until fiber meets the requirements of length, get final product discharging.Adopt pulverizer that the L2-A wet mixed feed is crushed to following fineness: the 4 order amounts of sieving are greater than 85%.
2.L2-B the preparation of wet mixed feed.It is as shown in the table to fill a prescription.
Cashew nut oil melamine modified phenolic resin technical indicator
| Softening temperature (℃) | Free phenol (%) | Polymerization velocity (second) |
| 102 | 1.5 | 80 |
With the cashew nut oil melamine modified phenolic resin, carbon black, refinery coke, powdered iron ore, synthetic graphite, chromite powder, water-ground limestone, ceramic fiber, aluminum oxide, aramid fiber and water add kneader in upper table ratio, open kneader and mediate oar and steam heater, progressively add solid nitrile rubber, the rock wool long filament, reclaim acrylic fibers and carbon fiber sleave, mediated 60～90 minutes, when temperature is raised to 110 ℃, the steam off heating unit, when solid nitrile rubber and other material fully dissolve each other, reduce the temperature to 90 ℃, add Vulcanization accelerator TMTD, anti-aging agent RD, Sulfur and hexamethylenetetramine, continue to mediate, until fiber meets the requirements of length, get final product discharging.Adopt pulverizer that the L2-B wet mixed feed is crushed to following fineness: the 8 order amounts of sieving are greater than 80%.
3.L2 molding compound preparation.It is as shown in the table to fill a prescription.Starting material in the following table and particle wet mixed feed adding high speed mixer are stirred, namely become molding compound.
| Composition | Weight ratio | Composition | Weight ratio |
| Powder resol | 3 | Synthetic graphite | 6 |
| The L2-A wet mixed feed | 30 | The L2-B wet mixed feed | 30 |
| Troilite powder | 6 | Chromite powder | 2 |
| Refinery coke | 6 | Brass borings | 6 |
| The friction powder | 7 | Barium sulfate | 4 |
Powder phenolic resins index
| Stream is apart from (mm) | Free phenol (%) | Polymerization velocity (second) |
| 32 | 1.2 | 78 |
The molding compound that mixes delivered on the press suppress.Die temperature is 155 ℃ during compacting, and pressure is 25Mpa, and the dwell time is 15 minutes.Baking oven is sent in the moulding that suppresses, heat-treated.Heat-treat condition, 140 ℃ begin to heat up, and per hour heat up 10 ℃, and 160 ℃ are incubated 2 hours, per hour heat up 20 ℃, and 220 ℃ are incubated 6 hours, furnace cooling.Can obtain the disc brake pad work in-process.
Adopt GB5763-2008 standard method test, performance is as follows:
In the inventive method, need add hexamethylenetetramine when adding resol, when adding rubber need add vulcanizing agent, promotor and anti-aging agent, when the staple fibre that calculates long filament shape or sleave shape filamentary material, resol, filler, other easy dispersion and the weight proportion between the rubber, the weight of resol comprises the weight of hexamethylenetetramine, and the weight of rubber comprises the weight of vulcanizing agent, promotor and anti-aging agent.
Claims (18)
1. adopt macrofiber to make the method that staple fibre strengthens friction materials, it is characterized in that, it comprise the steps: (1) with kneader as material by wet type mixing equipment, with water or solvent as treating compound, with long filament shape or sleave shape filamentary material and resol, filler, the staple fibre that other easily disperses and rubber are mediated and are mixed, described long filament shape or sleave shape filamentary material are broken into the staple fibre that reaches specified requirement, described staple fibre is again by described resol, the mixture of filler and rubber coats, and becomes with the wet mixed feed of fibrous particle with different big or small bulk particles; (2) adopt pulverizer to pulverize described wet mixed feed, become the particle wet mixed feed; (3) described particle wet mixed feed and powder resol, filler, other staple fibre that easily disperses with one or more different ingredients mixes in mixer, makes molding compound; (4) adopt mould pressing process, described molding compound is made brake friction material or chenille article clutch surface friction materials, make above-mentioned friction materials have non-homogeneous structure.
2. employing macrofiber as claimed in claim 1 is made the method that staple fibre strengthens friction materials, it is characterized in that the weight proportion scope is 5～35:8～20:30～60:2～10:2～18 between described long filament shape or sleave shape filamentary material, resol, filler, other staple fibre that easily disperses and the rubber.
3. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, when adopting pulverizer to pulverize described wet mixed feed, the granular size after the pulverizing is controlled at and makes 80%～95% described particle wet mixed feed can pass through 2～10 purpose screen clothes.
4. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that the weight content that described particle wet mixed feed accounts for described molding compound is 30% ~ 95%.
5. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that described kneader is with clamping device and vacuum unit; During described kneader work, adopt steam that described kneader is heated, the temperature of material in the described kneader can be regulated in 60～130 ℃ of scopes, by regulating temperature and vacuum tightness, control the moisture of described wet mixed feed; The screen cloth of described pulverizer has rectangular opening, and rectangular opening length is 10 ~ 20mm, and width is 1 ~ 3 mm, by the control rectangle hole dimension to control the size distribution of described particle wet mixed feed; Described mixer is high speed mixer, plough type mixer or helical-ribbon type mixer.
6. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that described long filament shape or sleave shape filamentary material are one or more the combination in glass fibre, rock wool fibers, carbon fiber, PAN-based stabilized fiber, synthon, the native cellulose fibre.
7. employing macrofiber as claimed in claim 6 is made the method that staple fibre strengthens friction materials, it is characterized in that, the various fibre weight content that form described long filament shape or sleave shape filamentary material are: glass fibre 2 ~ 70%, rock wool fibers 5 ~ 80%, carbon fiber 2 ~ 30%, PAN-based stabilized fiber 2 ~ 15%, synthon 2 ~ 15%, native cellulose fibre 2 ~ 20%.
8. employing macrofiber as claimed in claim 6 is made the method that staple fibre strengthens friction materials, it is characterized in that, described glass fibre is above sleave and glasscloth scrap stock of length 20mm; Described rock wool fibers is the above rock wool of length 100mm; Described carbon fiber is above sleave and carbon cloth scrap stock of length 20mm; Described PAN-based stabilized fiber is the sleave of length more than 20mm; Described synthon are the recycled fiber sleave of all lengths; Described recycled fiber sleave be the acrylic fibers weight content at the sleave more than 75%, or the terylene weight content is at the sleave more than 75%, or acrylic fibers and terylene the two add up to weight content at the sleave more than 75%; Described native cellulose fibre is for reclaiming cotton and flaxen fiber tankage.
9. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that described solvent is methyl alcohol or ethanol, and the part by weight of material is 2～8:100 in described water or solvent and the described kneader.
10. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, described resol is liquid thermoset resol, and its technical indicator is: solid content 75～80%, viscosity 1500～10000mPas under 25 ℃ of conditions.
11. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, described resol is solid thermoplastics resol, and its technical indicator is: polymerization velocity 60～200 seconds, and the weight content of free phenol is less than 3%; When adding described resol, need to add hexamethylenetetramine, it adds weight is 6～12% of described resol.
12. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that described resol is solid thermoplastics resol, its technical indicator is: polymerization velocity 80～110 seconds, the weight content of free phenol is less than 2%, 90～105 ℃ of softening temperatures; When adding described resol, need to add hexamethylenetetramine, it adds weight is 8～10% of described resol.
13. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, described rubber is unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR), or is powdered rubber, and described powdered rubber is acrylonitrile-butadiene rubber powder or tyre talc; When adding described unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR), need add simultaneously vulcanizing agent, promotor and anti-aging agent.
14. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that described filler is the combination of material more than five kinds in chromite powder, troilite powder, powdered iron ore, barite, barium sulfate, calcium carbonate, Feldspar Powder, aluminum oxide, silicon carbide, synthetic graphite, crystalline flake graphite, micro crystal graphite, refinery coke, friction powder, antimony sulfide, molybdenumdisulphide, reduced iron powder, the diatomite.
15. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, described staple fibre that other easily disperses be steel fiber, copper fiber, asbestos, short glass fiber, rock wool fibers, aramid pulp and conjugated fibre is a kind of or several combinations.
16. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, described rubber is powdered rubber, its reinforced order is as follows when kneading and mixing: add first described filler and powdered rubber, then add described resol, add again described water or solvent, start described kneader, progressively add described long filament shape or sleave shape filamentary material; During described kneader work, adopt steam that kneader is heated, the top temperature of material in the kneader is controlled in 80～100 ℃ of scopes, by regulating temperature and vacuum tightness, control the water content of described particle wet mixed feed; The time that material is mediated in described kneader is 1～3 hour; When described long filament shape or sleave shape filamentary material become the staple fibre that reaches specified requirement, get final product discharging.
17. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, described resol is described solid thermoplastics resol, described rubber is unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR), its reinforced order is as follows when kneading and mixing: add first described filler, then add described solid thermoplastics resol, add again described water or solvent, start described kneader, progressively add described unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR) and described long filament shape or sleave shape filamentary material, after described unvulcanized block nitrile rubber or block styrene-butadiene rubber(SBR) and described solid thermoplastics resol fully mix, add vulcanizing agent, promotor, anti-aging agent and hexamethylenetetramine; Before adding described hexamethylenetetramine, the top temperature of material is 100～120 ℃ in the described kneader; After adding described hexamethylenetetramine, the top temperature of material is 90～105 ℃ in the described kneader; Described vulcanizing agent, promotor, anti-aging agent and hexamethylenetetramine and other material are mediated evenly, when described long filament shape or sleave shape filamentary material become the staple fibre that reaches specified requirement, get final product discharging.
18. employing macrofiber as claimed in claim 1 or 2 is made the method that staple fibre strengthens friction materials, it is characterized in that, the staple fibre of described specified requirement refers to account for the length of fiber of total amount 80～90% all less than 20 millimeters.
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