CN107949718A - The method for manufacturing friction material - Google Patents
The method for manufacturing friction material Download PDFInfo
- Publication number
- CN107949718A CN107949718A CN201680041864.5A CN201680041864A CN107949718A CN 107949718 A CN107949718 A CN 107949718A CN 201680041864 A CN201680041864 A CN 201680041864A CN 107949718 A CN107949718 A CN 107949718A
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- China
- Prior art keywords
- friction material
- matrix
- fiber
- formaldehyde
- formaldehyde resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
Abstract
The present invention relates to a kind of method for being used to manufacture friction material (1), which is particularly used for frictional disk, and this method comprises the following steps：Matrix is placed, which includes being capable of at least one polymer of release formaldehyde during crosslinking, and formaldehyde catching agent is added in matrix, it is crosslinked matrix, in the method, during crosslinking, at least a portion of agent for capturing and the formaldehyde discharged during crosslinking is reacted.
Description
Technical field
The present invention relates to a kind of method for manufacturing friction material, relates more specifically to a kind of friction for being used to equip frictional disk
Material, the frictional disk can be dry friction type or wet friction type.
The present invention is more particularly directed to automotive field.
Background technology
In such an application, frictional disk can be integrated into the clutch that heat engine can be used to selectively connect to gearbox
In device.
Alternatively, friction material can be equipped with brake apparatus.
Such friction material generally includes to ensure the glass fibre of centrifugal force resistant, for obtain good friction coefficient and
The elastomer of good comfort level, various fillers, and include the matrix of polymer, such as carbamide polymer and/
Or phenol-formaldehyde polymer, so that integrated bond.
The polymer of release formaldehyde in cross-linking process is generally used in, particularly obtaining good friction power at high temperature must
The carbamide polymer needed.Therefore, during causing to manufacture the heat-press step of friction material, formaldehyde is released.
The release of formaldehyde, due to its harmful aspect, it is necessary to implement containment and reclaimer operation, to minimize it by operator
The suction of member.
Because formaldehyde promotes the crosslinking of some polymer in friction material, it is for keeping the good of this friction material
Performance is necessary, so the presence of formaldehyde is necessary.Therefore excessive formaldehyde is constantly present, it is in the manufacture friction material phase
Between may be sucked by operating personnel.
Friction material containing substantial amounts of resin to prevent the slipping phenomenon under severe riving condition, especially with
In the clutch with manual transmission of motor vehicles.In common polymer, melamine formaldehyde resin with its
The frictional behaviour of stabilization under high temperature and it is well-known.Therefore, in order not to reduce the performance of friction material, reduce in friction material formulation
The amount of melamine formaldehyde resin is not current key.
In order to overcome this problem, and in order in accordance with the regulation that formaldehyde is exposed on operating personnel, it will usually apply and inhale
Gas system, it is suitable for reducing the concentration of formaldehyde in operating personnel's surrounding air.
The implementation of this solution is restricted in terms of volume and maintenance, and is still regarding to the issue above slow
Solution and posteriority solution.
The content of the invention
It is contemplated that alleviate the above problem.
Therefore, subject of the present invention is the method for producing friction material, which is particularly used for frictional disk,
This method comprises the following steps：
- matrix is placed, which includes being capable of at least one polymer of release formaldehyde during crosslinking,
- formaldehyde catching agent is added in matrix,
- matrix is crosslinked,
In the method, during crosslinking, at least a portion of agent for capturing and the formaldehyde discharged during crosslinking is reacted.
A part for the formaldehyde discharged during crosslinking is retained in friction material, therefore its concentration in surrounding air
Reduce, so as to reduce the adverse effect to operating personnel.
The formaldehyde discharged during crosslinking can be gaseous, and its agent seizure that can be captured.Then the formaldehyde being captured
Be converted to condensed state and keep being limited in matrix.
Suitable agent for capturing will not have adverse effect on the performance of friction material.Notice the friction material
The excellent stability of elastic behavior and its size and tribological property in terms of temperature and energy.
Relative to the friction material of no agent for capturing, therefore friction material according to the present invention allows reduction to be present in environment
The amount of formaldehyde in air, and the performance having is made and is substantially equivalent to property without using friction material made of agent for capturing
The friction material of energy.
Matrix can include at least two different polymer, particularly two kinds of thermosetting resins, preferably melamine
Amine-formaldehyde resin and phenol-formaldehyde resin.
Preferably, phenol-formaldehyde resin is phenolic varnish type.The phenol-formaldehyde resin of the phenolic varnish type can be with
Catalyst combination, the catalyst particularly methenamine (or hexa), the catalyst promote the crosslinking of the resin.
Matrix can include two kinds of polymer for being capable of release formaldehyde, the polymer especially carbamide tree
Fat and resol type phenol-formaldehyde resin.
It should be noted that in the case where both resins are present in matrix, melamine formaldehyde resin is two kinds
The resin of most formaldehyde may be discharged in resin during crosslinking.
Preferably, melamine formaldehyde resin has 1.3 to 2.5 formaldehyde/melamine mass ratio.
Preferably, phenolic varnish type phenol-formaldehyde resin has the formaldehyde/phenol mass ratio less than 1.
In the case where matrix further includes resol type phenol-formaldehyde resin, which has 1.3 to 2 first
Aldehyde/phenol quality ratio.
Advantageously, matrix can also include at least one elastomer, particularly SBR styrene butadiene rubbers " SBR " (English
In styrene-butadiene rubber (SBR styrene butadiene rubbers) acronym), butadiene-acrylonitrile
Rubber " the NBR " (one known of the acronyme de nitrile butadiene rubber (nitrile rubber) in English
Word), non-carboxylation " NBR " or carboxylation " XNBR " or hydrogenated nitrile-butadiene rubber " HNBR ".
It is advantageously possible to mix vulcanizing agent in the elastomer, sulphur or zinc oxide are particularly, but do not mix in the elastomer
The situation for entering any vulcanizing agent is also feasible.
Matrix can include different types of rubber, particularly above two type " SBR " and " NBR ".
Before conversion, matrix may be at water phase, or it can be close dry-blend.
Preferably, polymer is mixed with each other before agent for capturing is added in matrix.
Another step of the method according to the invention can include adding at least one filler to matrix.
The filler can be organic, which can select from following non-limiting list：
- carbon black,
- Ka Delai (cardolite),
- graphite,
- activated carbon,
- petroleum coke ...
Alternatively, organic filler can be prepolymerized organic resin.
It is advantageously possible to a variety of organic fillers selected from above non-limiting list are added in matrix.
Organic filler can be added in matrix at the same time.
Alternatively, filler can be inorganic.The filler can be selected from following non-limiting list：
- barium sulfate,
- calcium carbonate,
- bead,
- calcined kaolin,
- copper,
- brass ...
It is advantageously possible to a variety of inorganic fillers selected from above non-limiting list are added in matrix.
Organic filler can be added in matrix at the same time.
Organic filler and inorganic filler can be added in matrix together.
Preferably, agent for capturing can derive from Green Chemistry.Agent for capturing can include tannin, particularly polymerizable condensation
Tannin, i.e. oligomer or flavane alkoxide polymer.
The chemical constitution of condensed tannin contains great amount of hydroxy group, it preferentially reacts with the formaldehyde discharged during crosslinking,
Therefore the discharge of the caused free formaldehyde during the crosslinking of one or more polymer of matrix is reduced.
More properly, formaldehyde polymerize with tannin to form methylene bridge, mainly at the aromatic rings of flavonoids unit.
Alternately or in addition, agent for capturing can include one or more elements in list below：
- guanidine carbonate,
- polyvinyl acetate,
- rice flour,
- wheat flour ...
When agent for capturing includes water-soluble substances, particularly natural materials, especially condensed tannin, and it is in matrix
In the case of water phase, it should limit the amount of condensed tannin.In fact, condensed tannin is water-soluble and is formed with elastomer macromolecular
Complex compound, elastomer particularly exist with form of rubber.The solidification of rubber has negative impact to the friction coefficient of friction material.
In fact, friction material and rubber group are more heterogeneous, and the risk that the rubber in water phase condenses can cause matrix excessively sticky.
Under certain proportion, condensed tannin can also be with promoting the crosslinked catalyst of phenolic varnish type phenol-formaldehyde resin
(such as methenamine, such as tetramine crosslinking) reaction.
The crosslinking of all or part of polymer existing for formaldehyde promotes, so the condensation list with the formaldehyde reaction of release
Rather to the crosslinking of polymer, particularly have a direct impact to the crosslinking degree of all or part of polymer.
Therefore, an excess amount of condensed tannin may be to phenolic varnish type phenol-formaldehyde resin and/or first rank phenol aldehyde type benzene
The crosslinking of resinox and/or melamine formaldehyde resin has a negative impact.
Since the performance of friction material and the crosslinking degree of its polymer are related, an excess amount of condensed tannin can reduce
Its performance (friction reduces, and abrasion accelerates).
Therefore, it is necessary to by between condensed tannin and phenolic varnish type phenol-formaldehyde resin and/or condensed tannin and trimerization
Mass ratio between cyanogen amine-formaldehyde resin is defined so that the performance of the friction material is substantially equivalent to no condensed tannin
The performance of friction material.
Mass ratio between condensed tannin and phenolic varnish type phenol-formaldehyde resin can be 0.15 to 2, it is therefore preferable to
0.3 to 0.7.
This formaldehyde than advantageouslying allow for condensed tannin and being discharged reacts, while the condensed tannin is also clear with same phenolic aldehyde
The catalyst of paint shaped phenol-formaldehyde resin combination reacts in limited extent, so that the parasitic reaction has no substantial effect on friction
The performance of material.
Mass ratio between condensed tannin and melamine resin can be 0.1 to 1.4, it is therefore preferable to 0.2 to
0.5。
In these ratios, it is even observed that condensed tannin does not limit the crosslinking of this resin.
In these ratios, condensed tannin advantageouslys allow for friction coefficient steady according to the temperature that friction material is undergone
It is fixed.
Another step of the method according to the invention can include providing at least one fiber.
These fibers can be selected from following kinds of fibers list：
- glass fibre, such as E types, S types or H-type
- metallic fiber, such as copper fiber or brass fiber
- organic fiber, such as aramid fibre or carbon fiber, especially PAN fiber or PAN-Preox fibers.
Fiber can be a classification or its combination.
According to another step of this method, all or part of fiber can be added in matrix.
Preferably, only the glass fibre of cutting is added in matrix.The glass fibre of these cuttings advantageouslys allow for carrying
The wear resistance of high friction material.
The length of these glass fibres can be 0.1 to 4mm.
These glass fibres being added in matrix can be arranged in groups, and the length of these groups can be 0.5 to 1mm.
In the case where only providing the fiber of cutting, the glass fibre that can be added to matrix is arranged to form friction material
The preformed member of material.The preformed member can take the form of piece.The prefabricated component dry-mixed can be formed by close.
Alternatively or with after the step of being previously described, all or part of fiber can form continuous line.The line
Fiber number measure can be 400 to 5000 Tekes.The foundation for forming the fiber of the line can be 10 μm to 25 μm.
Fiber can mutually tangle to form continuous lines.
According to another step of this method, matrix can be used and alternatively with one or more fillers, particularly had
Machine and/or inorganic filler impregnate the continuous lines.
The continuous lines can be by with or without the solvent comprising matrix and optional one or more fillers
Body lotion in pass through and impregnated.
The pre- fuse step of matrix resin can provide before continuous lines are passed through in the body lotion containing matrix.
Another step of this method can be included in after dipping continuous lines de- dry to remove unnecessary matrix and can to it
The filler of choosing.
According to another step of this method, the continuous lines of dipping can arrange the preformed member for being shaped as friction material,
It is particularly suitable for the preformed member of assembling frictional disk.
In known manner, preformed member can be made up of the piece for the continuous lines for being superimposed multiple dippings.
Preformed member can take the form of circular crown, the circular crown by be matrix crosslinking after friction material
Almost definite form.
Preferably, the continuous lines of dipping are formed around the continuous convex portion that the pivot of circular crown moves.Piecewise, it is convex
Portion can deviate angularly in relation to one another, so as to limit the shape of circular crown.
Regardless of the type of the fiber provided, preformed member can include：
- 7% to 30% melamine formaldehyde resin,
- 5% to 20% phenol-formaldehyde resin,
- 5% to 15% NBR types or SBR type elastomers,
- 45% to 70% organic filler, inorganic filler, fiber, particularly metal or glass fibre, and
- 3% to 10%, preferably 5% tannin, especially condensed tannin.
Shown percentage is the percentage by weight relative to the dry extracts of prefabrication.The weight hundred of this dry extracts
It can be 95% to 100% to divide ratio.
The crosslinking of matrix can be obtained by the hot compression of preformed member.
In the hot press method, forming the different elements of preformed member can be combined together.Filler and fiber week
The creep stage of the resin enclosed can carry out before the crosslinking of resin.
Preferably, hot compression occurs at a temperature of 130 to 200 DEG C
The friction material formed at the end of matrix is crosslinked, the friction material formed especially by hot compression can wrap
Include：
- 6.5% to 27% polymeric melamines-formaldehyde resin,
- 5.5% to 21% polymeric phenol-formaldehyde resin,
- 4.5% to 14.5% polymerization NBR types or SBR type elastomers,
- 40% to 65% organic filler, inorganic filler, metallic fiber, glass fibre, and
- 3% to 10%, the condensed tannin of preferably 5% polymerization.
Shown percentage is the percentage by weight relative to finished-product material.
Friction material can take the form of the annular bizet limited during preformed member shapes.
Subject of the present invention also resides in a kind of frictional disk, the particularly frictional disk for clutch, the frictional disk equipped with
At least one friction material as defined above.
A kind of reinforcing element, the reinforcing element being particularly formed from steel, can be arranged between friction material and frictional disk,
For example, friction material is bonded or coated molding on this frictional disk, the reinforcing element is especially by welding and progression element
It is coupled with disk.
No matter reinforcing element presence or absence, friction material may be affixed to frictional disk, especially by riveting or pass through
Weld or by gluing.Alternatively, friction material can be directly overmolded on frictional disk.
Subject of the present invention also resides in a kind of clutch for motor vehicles, particularly dry clutch, it is included such as
At least one friction material of upper definition.
Clutch can include the frictional disk with two faces, and each face can be with the friction of corona shape in a ring
Material is associated.
Clutch can be for example including two frictional disks.
According to another application, friction material as defined above can be integrated into brake apparatus.
Finally, subject of the present invention applies to the friction material of assembling frictional disk, which is particularly used for clutch
Device, the friction material include：
- 6.5% to 27% polymeric melamines-formaldehyde resin,
- 5.5% to 21% polymeric phenol-yuban,
The NBR types or SBR type elastomers of -4.5% to 14.5% polymerization,
- 40% to 65% organic filler, inorganic filler, metallic fiber, glass fibre, and
- 3% to 10%, preferably 5% polymerization tannin,
Shown percentage is the percentage by weight relative to finished-product material.
Brief description of the drawings
Other features and advantages of the present invention by by reference to attached drawing the present invention illustrative embodiments description in
Become apparent, be shown in the drawings：
Fig. 1 shows the example for the friction material that manufacturing method according to the invention obtains；
Fig. 2 shows the embodiment of the method for manufacturing friction material according to the present invention；
Fig. 3 shows the friction coefficient of two kinds of friction materials (friction material of Fig. 1 and Fig. 2 are with compareing friction material) according to temperature
The contrastive change of degree.
Embodiment
Fig. 1 shows the friction material 1 of the clutch for motor vehicles.
The friction material 1 of this bizet in a ring especially can be in traditional dry clutch, or in dry dual clutch
Realize.This clutch traditionally includes two friction materials 1 or four friction materials 1.
Each friction material can be associated with the face of frictional disk.In the example considered, set in friction material 1
Mounting hole 2, for making fastening means (such as rivet) by the way that friction material is attached to frictional disk.
In the example considered, in order to allow clutch transmission torque, frictional disk can be interposed in pressing plate and reaction plate
Between.
Friction material 1 has radial inside edge 3 and radial outside edge 4.Friction lining 1, which further includes, is connected to reinforcer
The face of (such as the paper tinsel or supporting item being formed from steel) and opposite rubbing surface 5.
On rubbing surface 5, friction lining 1 includes the groove 6 of aturegularaintervals each other, and convex block 9 is limited between groove 6.
The thickness of pad 1 is about 2mm, can change to 4mm from 1.5mm.The depth of groove 6 can be in the thickness of pad 1
Change between 25% and 100%.
With reference to Fig. 2, we may presently be described the manufacture method of the friction material of Fig. 1.
The step 10 of manufacture method is to place matrix.
The matrix is (clear for two kinds of thermosetting polymers, melamine formaldehyde resin and phenolic aldehyde herein by mixed polymer
Paint shaped phenol-formaldehyde resin) and formed.
Novolak phenolics are combined with hexa, and hexa is that a kind of this resin of promotion is handed over
The catalyst of connection.
Only melamine resin can during crosslinking release formaldehyde.Although situation in the example considered herein
It is really not so, but matrix can also include can during crosslinking second of type of release formaldehyde polymer, i.e. phenolic aldehyde
Resol type phenol-formaldehyde resin.
Matrix includes elastomer, such as " SBR " rubber or " NBR " rubber.The elastomer can be combined with vulcanizing agent, such as
Sulphur or zinc oxide.
Once these mixed with polymers, it is possible to which agent for capturing is added in matrix.In the example considered, the seizure
Agent is polymerizable condensed tannin, i.e. the oligomer or polymer of flavanols.
In the following steps of the method for description manufacture friction material 1, we will be described in its action.
After the step 10, there is provided to the step 20 of matrix addition filler.
These fillers are organic and/or inorganic.Organic filler can be selected from following non-limiting list：
- carbon black,
- Ka Delai (cardolite),
- graphite,
- activated carbon,
- petroleum coke.
And inorganic filler can be selected from following non-limiting list：
- barium sulfate,
- calcium carbonate,
- bead,
- calcined kaolin,
- copper
- brass
All these fillers are added in matrix at the same time.
Step 30 includes the glass fibre of addition cutting.The glass fibre of these cuttings advantageouslys allow for increase friction material
1 wear resistance.E, S or H-type glass fibre are arranged in groups, and for example with 0.5 to 1mm length.
Meanwhile in above-mentioned steps, step 40 includes providing by glass fibre and/or metallic fiber and/or organic fiber
The continuous lines of formation, the fiber is entangled with one another, so that the fiber number of the continuous lines is determined as 400 to 5000 Tekes.
Especially, the fiber for forming continuous lines is glass fibre, polyacrylonitrile (PAN) fiber, aramid fibre, carbon
Conductive wire (copper) that fiber and twisting are tangled etc..
The step 50 of manufacture method is included by making the continuous lines in step 40 formation comprising matrix and from step 30
Filler body lotion in pass through and impregnate the continuous lines.The de- dry matrix for being also provided to remove excess of the continuous lines of dipping
And filler.
Step 50 can also be the close dry-blend of the component referred to immediately above.
During step 60, the continuous lines arrangement of dipping is shaped as the preformed member of friction material 1.This rounded bizet
Shape preformed member be friction material 1 almost definite form.
In step 70, it is crosslinked in the hot press method for the preformed member that matrix is formed in a step 60, this hot compression mistake
Journey carries out at a temperature of 130 to 200 DEG C.This pressure baking usually in mould, it is allowed to the difference of preformed member
The creep of polymer, so as to obtain the friction material 1 with substantially constant thickness.The step allow attachment to reinforcer face and
Rubbing surface 5 is essentially parallel from one to another.
By crosslinking, the polymer of melamine formaldehyde resin release formaldehyde in a gaseous form.The formaldehyde of release is condensed
Tannin is caught, and is then transformed into state of aggregation and is remained and constrains in matrix.It is the hydroxyl and the formaldehyde of release of condensed tannin
React and allow its seizure.Therefore, condensed tannin allows the formaldehyde emissions during reduction hot compression.
Finally, which can include finishing step 80, and the deburring which includes mounting hole 2 is grasped
Work, rear baking, grinding and drilling operation etc..
The shortcomings that condensed tannin, is reacted in certain proportion with hexa during hot compression, the hexa-methylene
Tetramine is the promotion crosslinked catalyst of phenolic varnish type phenol-formaldehyde resin.
When condensed tannin in certain proportion in the presence of, condensed tannin also influences to polymerize during the hot compression of preformed member
The degree of cross linking of thing.
Finally, condensed tannin influences the condensation of the rubber in water phase, and causes in certain proportion for continuous lines
The excessively sticky and impermeable dispersion of matrix for dipping.
The performance of friction material 1 is related with the degree of cross linking of the polymer of matrix, the microstructure particularly with friction material
It is related, it is the microstructure part the result of crosslinked polymer degree.
Therefore the ratio that there is no negative effect to the performance of friction material for condensed tannin should be defined.Cause
This, the mass ratio between condensed tannin and different polymer has been defined so that the performance of friction material 1 is substantially equivalent to
There is no the performance of the friction material of condensed tannin.
It has been observed that for formaldehyde/melamine mass ratio be 1.3 to 2.5 carbamide tree
Fat, the mass ratio between condensed tannin and melamine formaldehyde resin are necessary for 0.1 to 1.4, it is therefore preferable to 0.2 to 0.5.
Similarly, it has been observed that, for formaldehyde/melamine mass ratio less than 1 phenolic varnish type phenol-
Formaldehyde resin, the mass ratio between condensed tannin and melamine formaldehyde resin are necessary for 0.15 to 2, it is therefore preferable to 0.3 to
0.7。
In order to illustrate influence of the tannin to the performance of friction material 1, the particularly shadow in terms of abrasion, thermal behavior and friction
Ring, also to study influence of the tannin to Formaldehyde Determination., it is i.e. single comprising condensation to have compared two kinds of friction materials
Peaceful Fig. 1 and the friction material 1 (synthetic B) of Fig. 2 and the control friction material (synthetic A) for not containing condensed tannin.Should
It is noted that phenolic varnish type phenol-formaldehyde resin, melamine resin, NBR rubber, organic filler and glass fibers
The percentage of dimension is identical in synthetic A and B.
Show in tablei and the synthetic of the prefabrication type part of the friction material is obtained (in the polymerization of friction matrix by it
Before thing crosslinking)：
Table 1
By test of many times, it was observed that the formaldehyde of friction material 1 releases friction material of the discharge relative to no condensed tannin
Averagely reduce 13.8%.
In order to test and compare the performance of the friction material of the preformed member from synthetic A and B, with 305J/cm2Work(
Rate and the temperature rise from 50 DEG C to 400 DEG C, realize multiple continuous connection cycles in dry type manual clutch.This experiment allows to survey
Measure the wear levels of the friction material after the friction stability of friction material, heat resistance and experiment.These features and crosslinking
Spend it is related, therefore experiment allow to judge tannin on the crosslinked influence of matrix polymer.
Fig. 3 is by schematically showing the friction by the friction material that the preformed member of synthetic A and B obtain according to temperature
Coefficient value shows the result of these experiments.Although lower slightly at high temperature, the frictional behaviour of two kinds of friction materials is comparable.
Fig. 3 also allows it was noticed that the friction coefficient of material 1 is with more more stable according to temperature than control friction material
The friction coefficient of degree.
Although being not shown, the thermal behavior of friction material and wear levels are similar.
Therefore the condensed tannin that addition weight ratio is 5% in synthetic will not reduce friction to substitute inorganic filler
The performance of material, and allow the formaldehyde emissions in air reducing about 14%.
It is also to be noted that the friction material 1 of the preformed member from synthetic A includes：
- 6.5% to 27% polymeric melamines-formaldehyde resin,
- 5.5% to 21% polymeric phenol-yuban,
- 4.5% to 14.5% polymerization NBR types or SBR type elastomers,
- 40% to 65% organic filler, inorganic filler, metallic fiber, glass fibre, and
- 3% to 10%, preferably 5% polymerization tannin,
Shown percentage is the percentage by weight relative to finished-product material.
The invention is not restricted to exemplary embodiment, and the present invention should be explained in a non limiting manner, and this hair
It is bright including any equivalent embodiment.
Claims (18)
1. one kind is used for the method for manufacturing friction material (1), the friction material is particularly used for frictional disk, the described method includes
Following steps：
- matrix is placed, which includes being capable of at least one polymer of release formaldehyde during crosslinking,
- formaldehyde catching agent is added in matrix,
- matrix is crosslinked,
In the method, during crosslinking, at least a portion of agent for capturing and the formaldehyde discharged during crosslinking is reacted.
2. the method for manufacturing friction material (1) according to previous item claim, the matrix includes at least two
Different polymer, particularly two kinds of thermosetting resins, preferably melamine formaldehyde resin and phenol-formaldehyde resin.
3. the method according to claim 1 or 2 for manufacturing friction material (1), the matrix can also include at least
A kind of elastomer, particularly SBR styrene butadiene rubbers or butadiene-propylene nitrile rubber.
4. the method according to any one of the preceding claims for manufacturing friction material (1), including to the matrix
The step of addition at least one organic filler.
5. the method according to any one of the preceding claims for manufacturing friction material (1), including to the matrix
The step of addition at least one inorganic filler.
6. the method according to any one of the preceding claims for manufacturing friction material (1), the agent for capturing includes
Tannin, the condensed tannin that can especially polymerize.
7. the method for manufacturing friction material (1) according to previous item claim, the condensed tannin and phenolic aldehyde are clear
Mass ratio between the phenol-formaldehyde resin of paint shaped is 0.15 to 2, it is therefore preferable to 0.3 to 0.7.
8. the method for manufacturing friction material (1) according to claim 6 or 7, the condensed tannin and melamine-
Mass ratio between formaldehyde resin is 0.1 to 1.4, it is therefore preferable to 0.2 to 0.5.
9. the method according to any one of the preceding claims for manufacturing friction material (1), one of the method
Step includes providing at least one fiber selected from following kinds of fibers list：
- glass fibre, such as E types, S types or H-type
- metallic fiber, such as copper fiber or brass fiber
- organic fiber, such as aramid fibre or carbon fiber
10. the method for manufacturing friction material (1) according to previous item claim, all or part of fiber is added
The matrix is added to, the glass fibre of preferably only cutting is added to the matrix.
11. the method for manufacturing friction material (1) according to claim 9 or 10, all or part of formation of fiber
Continuous lines.
12. the method for manufacturing friction material (1) according to claim 9 or 10, the continuous lines are by the matrix
Dipping, to form the preformed member of the friction material (1), is particularly suitable for the preformed member of assembling frictional disk.
13. the method for manufacturing friction material (1) according to previous item claim, the preformed member include：
- 7% to 30% melamine formaldehyde resin,
- 5% to 20% phenol-formaldehyde resin,
- 5% to 15% NBR or SBR type elastomers,
- 45% to 70% organic filler, inorganic filler, fiber, particularly metal or glass fibre,
- 3% to 10%, preferably 5% tannin, particularly condensed tannin.
Shown percentage is the percentage by weight relative to the dry extracts of preformed member.The percentage by weight of dry extracts
For 95% to 100%.
14. the method for manufacturing friction material (1) according to claim 12 or 13, the crosslinking of the matrix pass through institute
The hot compression for stating preformed member obtains, preferably at a temperature of 130 to 200 DEG C.
15. the method for manufacturing friction material (1) according to previous item claim, at the end of the matrix is crosslinked
The friction material (1) of formation, including：
- 6.5% to 27% polymeric melamines-formaldehyde resin,
- 5.5% to 21% polymeric phenol-formaldehyde resin,
The NBR types or SBR type elastomers of -4.5% to 14.5% polymerization,
- 40% to 65% organic filler, inorganic filler, metallic fiber, glass fibre,
- 3% to 10%, the condensed tannin of preferably 5% polymerization,
Shown percentage is the percentage by weight relative to finished-product material.
16. a kind of frictional disk, particularly for clutch, its equipped with it is according to any one of the preceding claims at least
One friction material (1).
17. clutch, in particular for the dry clutch of motor vehicles, including according to any one of preceding claims 1-15
At least one friction material.
18. a kind of friction material (1), suitable for being equipped with frictional disk, the frictional disk is particularly used for clutch, the friction material
Material (1) includes：
- 6.5% to 27% polymeric melamines-formaldehyde resin,
- 5.5% to 21% polymeric phenol-yuban,
NBR the or SBR type elastomers of -4.5% to 14.5% polymerization,
- 40% to 65% organic filler, inorganic filler, metallic fiber, glass fibre,
- 3% to 10%, preferably 5% polymerization tannin,
Shown percentage is the percentage by weight relative to finished-product material.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1555879A FR3037967B1 (en) | 2015-06-25 | 2015-06-25 | PROCESS FOR THE MANUFACTURE OF A FRICTION MATERIAL |
| FR1555879 | 2015-06-25 | ||
| PCT/EP2016/063963 WO2016207068A1 (en) | 2015-06-25 | 2016-06-16 | Method for producing a friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107949718A true CN107949718A (en) | 2018-04-20 |
Family
ID=53879685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680041864.5A Pending CN107949718A (en) | 2015-06-25 | 2016-06-16 | The method for manufacturing friction material |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3314142A1 (en) |
| CN (1) | CN107949718A (en) |
| FR (1) | FR3037967B1 (en) |
| WO (1) | WO2016207068A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3093153B1 (en) * | 2019-02-27 | 2022-08-12 | Valeo Materiaux De Friction | Additive manufacturing process of a friction lining |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1529091A (en) * | 1975-04-21 | 1978-10-18 | Bendix Corp | Lignin friction material |
| US20080021155A1 (en) * | 2006-04-21 | 2008-01-24 | Bono Pierre J | Methods for Producing Modified Aromatic Renewable Materials and Compositions Thereof |
| CN103788320A (en) * | 2014-01-23 | 2014-05-14 | 抚顺唯特化工有限公司 | Method for synthesizing thermoplastic cashew nut phenolic resin |
| CN104194252A (en) * | 2014-08-14 | 2014-12-10 | 济南圣泉集团股份有限公司 | Graphene-modified thermoplastic phenolic resin, preparation method thereof and friction material |
| CN104292409A (en) * | 2014-09-29 | 2015-01-21 | 盐城工学院 | Modified phenolic resin and friction material containing same |
| CN104312148A (en) * | 2014-10-28 | 2015-01-28 | 山东中大药业有限公司 | Resin-based frictional material and preparation process thereof |
| CN104327800A (en) * | 2014-10-28 | 2015-02-04 | 山东中大药业有限公司 | Resin-based friction material for brake block and preparation process of resin-based friction material |
| CN104877631A (en) * | 2015-05-12 | 2015-09-02 | 长春特必克世立汽车零部件有限公司 | Drum-type brake pad friction material with high impact strength |
-
2015
- 2015-06-25 FR FR1555879A patent/FR3037967B1/en active Active
-
2016
- 2016-06-16 CN CN201680041864.5A patent/CN107949718A/en active Pending
- 2016-06-16 EP EP16733015.8A patent/EP3314142A1/en not_active Withdrawn
- 2016-06-16 WO PCT/EP2016/063963 patent/WO2016207068A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1529091A (en) * | 1975-04-21 | 1978-10-18 | Bendix Corp | Lignin friction material |
| US20080021155A1 (en) * | 2006-04-21 | 2008-01-24 | Bono Pierre J | Methods for Producing Modified Aromatic Renewable Materials and Compositions Thereof |
| CN103788320A (en) * | 2014-01-23 | 2014-05-14 | 抚顺唯特化工有限公司 | Method for synthesizing thermoplastic cashew nut phenolic resin |
| CN104194252A (en) * | 2014-08-14 | 2014-12-10 | 济南圣泉集团股份有限公司 | Graphene-modified thermoplastic phenolic resin, preparation method thereof and friction material |
| CN104292409A (en) * | 2014-09-29 | 2015-01-21 | 盐城工学院 | Modified phenolic resin and friction material containing same |
| CN104312148A (en) * | 2014-10-28 | 2015-01-28 | 山东中大药业有限公司 | Resin-based frictional material and preparation process thereof |
| CN104327800A (en) * | 2014-10-28 | 2015-02-04 | 山东中大药业有限公司 | Resin-based friction material for brake block and preparation process of resin-based friction material |
| CN104877631A (en) * | 2015-05-12 | 2015-09-02 | 长春特必克世立汽车零部件有限公司 | Drum-type brake pad friction material with high impact strength |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3314142A1 (en) | 2018-05-02 |
| FR3037967A1 (en) | 2016-12-30 |
| WO2016207068A1 (en) | 2016-12-29 |
| FR3037967B1 (en) | 2020-04-24 |
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