CN101363492A - Wet friction material - Google Patents
Wet friction material Download PDFInfo
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- CN101363492A CN101363492A CNA2008101453450A CN200810145345A CN101363492A CN 101363492 A CN101363492 A CN 101363492A CN A2008101453450 A CNA2008101453450 A CN A2008101453450A CN 200810145345 A CN200810145345 A CN 200810145345A CN 101363492 A CN101363492 A CN 101363492A
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Abstract
In a wet friction material, to be able to reduce a drag torque, while being greater in a disengagement feature and a positive [mu]-V slope characteristic by keeping a pore diameter large without generating strength reduction or increase in settling quantity. By adding small-particle inorganic filler 2, it attaches the inorganic filler 2 to inter-fiber 3 and it can obtain an effect to improve strength of friction material substrates 1 by connecting the inter-fiber 3 when an impregnated resin is hardened. Moreover, by keeping an absolute specific gravity of the inorganic filler 2, its compounded capacity becomes small and it can secure a pore diameter 5 of the friction material substrates 1 without being filled in pores of the friction material substrates 1 with the inorganic filler 2. As a result, it makes faster to absorb ATF from a friction surface. Therefore, it improves the disengagement feature and the positive [mu]-V slope characteristic, while reducing the drag torque.
Description
Technical field
[0001] the present invention relates to a kind of by applying the wet friction material that high pressure obtains torque to forward surface under the state in being immersed in oil, this wet friction material is the core bonding fan type friction member that has cut into the friction member base material of fan sheet and constituted on complete all two sides or single face to dull and stereotyped ring-type, and on the two sides of the core of dull and stereotyped ring-type or single face the friction member base material of bonding ring-type and the ring-type friction member that constitutes.
Background technique
[0002] in recent years, in order to reduce the automatic transmission (AutomaticTransmission of Motor Vehicle etc., below all abbreviate " AT " as) the speed change that produces because of multipolarity impact, be used for requiring to improve on the wet friction material of AT the characteristic (engaging and release characteristics) of speed change.In order to improve release characteristics, by the hole diameter or the increase porosity that increases wet friction material, make when discharging between the rubbing surface of wet friction material and matching block sheet and be not easy by automatic transmission lubricant oil (Automatic Transmission Fluid, below all abbreviate " ATF " as) to form oil film be effectively (in addition, " ATF " is the registration face mark of Japanese bright dipping industrial (strain)).
[0003] in the invention of " wet friction material " of Japanese documentation 1, the silica and the discoid silicious marl that in paper base material, contain average particulate diameter 1 μ m～10 μ m, and the hardening thing of the aqueous resin combination that mixes solvable type phenolic resin and silicone resin and obtain used as joining material.Thus, can obtain to have high coefficient of friction, heat resistance (heat-resisting spot) is good, the wet friction material of the positive gradient raising of μ-V characteristic.
Patent documentation 1: TOHKEMY 2004-138121 communique
Summary of the invention
The problem that invention will solve
[0004] still, in above-mentioned patent documentation 1 in the above-mentioned wet friction material, the little silicious marl of actual specific gravity that contains 25 weight %～45 weight % in paper base material has been filled up the interfibrous pore of paper base material sometimes by silicious marl, hole diameter diminishes and can not get good release characteristics.To this, in order to enlarge the hole diameter and the porosity,, or reduce wadding density if increase the fibrillation of the fiber of paper base material, then exist the intensity of wet friction material to reduce and the problem of drawback such as permanent strain amount increase.
[0005] therefore, in the present invention, with provide can not take place that intensity reduces and the positive gradient excellence of drawback such as permanent strain amount increase, μ-V characteristic, can not only reduce drag torque and the hole diameter release characteristics by increasing wet friction material also the wet friction material of excellence be problem.
In order to solve the means of problem
[0006] technical solution of the present invention 1 is a kind of wet friction material, described wet friction material is with by making the friction member base material that paper body heat of immersion hardening resin and hot hardening form of copying that contains fibre content and packing composition, be bonded on the single face of core of dull and stereotyped ring-type or the two sides and constitute, wherein, to copy the paper body all with respect to above-mentioned, in the scope of 5 weight %～40 weight %, in above-mentioned packing composition, contain average particulate diameter in the scope of 0.3 μ m～10 μ m, actual specific gravity is in 4～6 scope, one or more the inorganic filler of Mohs hardness in 3～8 scope.
[0007] at this, be included in the fan type friction member that the bonding friction member base material that cuts into the fan sheet forms on the core of dull and stereotyped ring-type as " wet friction material ", and on the core of dull and stereotyped ring-type the friction member base material of bonding ring-type and these two kinds of friction members of ring-type friction member of forming.
[0008] in addition, said " actual specific gravity " is the term corresponding to " bulk density ", is not meant the bulk density (apparent density) under the situation that has the space among the inorganic filler, and is meant original proportion of the material that constitutes inorganic filler.As satisfying technical solution of the present invention 1 described " inorganic filler of important document ", zine oxide, barium sulphate, titanium oxide etc. are arranged.Particularly, average particulate diameter be that 0.3 μ m～1.0 μ m, actual specific gravity are 5.5～6.0, Mohs hardness is 4～5 zine oxide, or average particulate diameter is that 3 μ m～10 μ m, actual specific gravity are 4.0～4.5, Mohs hardness is that 3～4 barium sulphate is desirable as inorganic filler.
[0009] technical solution of the present invention 2 is a kind of wet friction material, described wet friction material is to copy paper body heat of immersion hardening resin after having added as the inorganic filler of the remainder of above-mentioned packing composition to what the part of fibre content and packing composition copied that paper forms by making, perhaps by the paper body dipping of copying that the part of fibre content and packing composition is copied that paper forms has been added as the thermosetting resin of the inorganic filler of the remainder of above-mentioned packing composition and the friction member base material that hot hardening forms, be bonded on the single face of core of dull and stereotyped ring-type or the two sides and constitute, wherein, above-mentioned inorganic filler is that average particulate diameter is in the scope of 0.3 μ m～10 μ m, actual specific gravity is in 4～6 scope, one or more the inorganic filler of Mohs hardness in 3～8 scope is to be added in above-mentioned scope of copying all 5 weight %～40 weight % of paper body.
[0010] wet friction material of technical solution of the present invention 3 is, in technical solution of the present invention 1 or 2, above-mentioned fibre content is in the scope of 30 weight %～60 weight % at the above-mentioned containing ratio of copying in the paper body, and above-mentioned packing composition is in the scope of 40 weight %～70 weight % at the above-mentioned containing ratio of copying in the paper body.
[0011] wet friction material of technical solution of the present invention 4 is, in each of technical solution of the present invention 1 to 3, the peak that the hole diameter of being measured by mercury penetration method of above-mentioned friction member base material distributes is in the scope of 1 μ m～20 μ m, and the porosity of above-mentioned friction member base material is in 30%～70% scope.
The effect of invention
[0012] technical solution of the present invention 1 is a kind of wet friction material, be will be by making the friction member base material that paper body heat of immersion hardening resin and hot hardening form of copying that contains fibre content and packing composition, be bonded on the single face of core of dull and stereotyped ring-type or the two sides and constitute, wherein, in the packing composition, with respect to copying the paper body all in the scope of 5 weight %～40 weight %, contain average particulate diameter in the scope of 0.3 μ m～10 μ m, actual specific gravity is in 4～6 scope, one or more the inorganic filler of Mohs hardness in 3～8 scope.
[0013] at this, be included in the fan type friction member that the bonding friction member base material that is cut into the fan sheet of the core of dull and stereotyped ring-type forms as " wet friction material ", and on the core of dull and stereotyped ring-type the friction member base material of bonding ring-type and these two kinds of friction members of ring-type friction member of forming.As " actual specific gravity ", be word corresponding to " bulk density ", not the bulk density (apparent density) that has the space in the inorganic filler, and be meant original proportion of the material that constitutes inorganic filler." inorganic filler " as the important document that satisfies technical solution of the present invention 1 has zine oxide, barium sulphate, titanium oxide etc.Especially average particulate diameter be that 0.3 μ m～1.0 μ m, actual specific gravity are 5.5～6.0, Mohs hardness 4～5 zine oxide or average particulate diameter be 3 μ m～10 μ m, actual specific gravity 4.0～4.5, Mohs hardness is desirable at 3～4 barium sulphate as inorganic filler.
[0014] present inventors are to found that the release characteristics in the raising wet friction material is attentively studied repeatedly, all contain one or more the inorganic filler of average particulate diameter in the scope of 0.3 μ m～10 μ m, in the scope of actual specific gravity 4～6, in the scope of Mohs hardness 3～8 by making in above-mentioned packing composition with respect to the above-mentioned paper body of copying in the scope of 5 weight %～40 weight %, can be when guaranteeing the intensity of wet friction material, release characteristics is improved, based on this viewpoint, finished the present invention.
[0015] promptly, by adding the little inorganic filler of particle diameter, can access inorganic filler attached between fiber and the fiber, when the hardening of resin that has flooded with fiber between in conjunction with, effect that the intensity of friction member base material is improved, in addition, by guaranteeing the actual specific gravity of inorganic filler, the capacity of proportioning diminishes, or the pore of friction member base material can not guaranteed the hole diameter of friction member base material by the inorganic filler landfill.Thus, because absorb speeding up of ATF, so release characteristics has improved from rubbing surface.
[0016] here, under the situation of average particulate diameter less than 0.3 μ m of inorganic filler, when copying paper, be not easy to combine with fiber, in addition, flow with water from copying gauze, can not stablize proportioning, on the other hand, if average particulate diameter surpasses 10 μ m, then interfibrous pore is by the inorganic filler landfill, and hole diameter diminishes, in addition, because the granule number of inorganic filler reduces, so the effect that improves in conjunction with the intensity that makes the friction member base material between the fiber has been reduced.
[0017] in addition, if actual specific gravity is less than 4, because the capacity of proportioning, granule number increase, so pore is by landfill, the hole diameter and the porosity diminish, and can not obtain good release characteristics, on the other hand, if actual specific gravity surpasses 6, because the capacity of proportioning, granule number reduce, thus the effect that improves in conjunction with the intensity that makes the friction member base material between fiber is reduced, simultaneously, dispersiveness when copying paper worsens, and can not be dispersed in the friction member base material.
[0018] and then, friction factor when engaging with the matching block sheet reduces if, then there is friction member less than 3 in Mohs hardness, or the situation of inorganic filler abrasion, on the other hand, if Mohs hardness is above 8, then the aggressiveness to the matching block sheet will rise, and make the abrasion of matching block sheet.In addition, if inorganic filler is with respect to copying the paper body less than 5 weight %, because the proportioning ratio of other packing and fiber is big, so can not guarantee hole diameter, on the other hand, if inorganic filler surpasses 40 weight % with respect to copying the paper body, then the capacity of proportioning and granule number increase, and still can not guarantee hole diameter.
[0019] does formed wet friction material like this, can not cause drawbacks such as intensity reduction and the increase of permanent strain amount, the positive gradient excellence of μ-V characteristic not only can reduce drag torque, and because increase the hole diameter of wet friction material, so release characteristics is also excellent.
[0020] wet friction material of technical solution of the present invention 2, be to copy paper body heat of immersion hardening resin after having added by making to what the part of fibre content and packing composition copied that paper forms as the inorganic filler of packing composition, perhaps with by making the paper body dipping of copying that the part of fibre content and packing composition is copied that paper forms add thermosetting resin as the inorganic filler of the remainder of packing composition, wherein, inorganic filler is that average particulate diameter is in the scope of 0.3 μ m～10 μ m, actual specific gravity is in 4～6 scope, one or more the inorganic filler of Mohs hardness in 3～8 scope is to be added in the scope of copying all 5 weight %～40 weight % of paper body.
[0021] wet friction material of the present invention, to be that the manufacture method of friction member base material has some different with the wet friction material of technological scheme 1, and the friction member base material of acquisition comes down to identical.Therefore, the reason according to identical with the wet friction material of technological scheme 1 can obtain same action effect.
[0022] does like this, formed wet friction material can not cause drawbacks such as intensity reduction and the increase of permanent strain amount, and the positive gradient excellence of μ-V characteristic not only can reduce drag torque, and owing to increase the hole diameter of wet friction material, so release characteristics is also excellent.
[0023] in the wet friction material of technical solution of the present invention 3, the containing ratio of fibre content in copying the paper body is in the scope of 30 weight %～60 weight %, and the containing ratio of packing composition in copying the paper body is in the scope of 40 weight %～70 weight %.
[0024] if, then there is the situation of the intensity reduction of friction member less than 30 weight % in the containing ratio of fibre content, in addition, the packing composition is not easy to combine with fiber when copying paper, and existence can not be stablized the situation of proportioning.On the other hand, if the containing ratio of fibre content surpasses 60 weight %, then the hole diameter and the porosity diminish because of fiber, and existence can not obtain the situation of good release characteristics.Therefore, the containing ratio of fibre content in copying the paper body is desirable in the scope of 30 weight %～60 weight %.
[0025] in relative therewith relation, if the containing ratio of packing composition less than 40 weight %, the hole diameter and the porosity diminish because of fiber, existence can not obtain the situation of good release characteristics.On the other hand, if the containing ratio of packing composition surpasses 70 weight %, because fibre content tails off, so there is the situation of the intensity reduction that causes friction member, in addition, exist the packing composition when copying paper, to be not easy to combine, can not stablize the situation of proportioning with fiber.Therefore, the containing ratio of packing composition in copying the paper body is desirable in the scope of 40 weight %～70 weight %.
[0026] does like this, formed wet friction material can not cause drawbacks such as intensity reduction and the increase of permanent strain amount, and the positive gradient excellence of μ-V characteristic not only can reduce drag torque, and owing to increase the hole diameter of wet friction material, so release characteristics is also excellent.
[0027] in the wet friction material of technical solution of the present invention 4, the peak that the hole diameter of being measured by mercury penetration method of friction member base material distributes is in the scope of 1 μ m～20 μ m, and the porosity of friction member base material is in 30%～70% scope.Peak that the hole diameter of being measured by mercury penetration method distributes less than 1 μ m, the porosity less than 30% situation under, because the ATF assimilation effect of wet friction material and discharge effect diminish, the situation that exists release characteristics and heat resistance to worsen, surpass under 70% the situation above the 20 μ m or the porosity at the peak that the hole diameter of being measured by mercury penetration method distributes, because causing the intensity of wet friction material reduces, ATF assimilation effect and discharge effect are too high, so there is the situation of biting shock.
[0028] therefore, the peak that the hole diameter of being measured by mercury penetration method of friction member base material distributes is desirable in the scope of 1 μ m～20 μ m, and the porosity of friction member base material is desirable in 30%～70% scope.
[0029] does formed wet friction material like this, can not cause drawbacks such as intensity reduction and the increase of permanent strain amount, the positive gradient excellence of μ-V characteristic not only can reduce drag torque, and because increase the hole diameter of wet friction material, so release characteristics is also excellent.
Description of drawings
[0051]
Fig. 1 (a) is the coordinate diagram of release characteristics of the wet friction material of expression embodiments of the present invention, (b) is the coordinate diagram of the release characteristics of the existing wet friction material of expression.
Fig. 2 is shearing strength and comparative example relatively the coordinate diagram of expression with the friction member base material of the wet friction material of embodiments of the present invention.
Fig. 3 (a) is the in-built ideograph of the existing friction member base material of expression, (b) is the in-built ideograph of friction member base material of the wet friction material of expression embodiment of the present invention.
Fig. 4 is hole diameter distribute and comparative example compare the coordinate diagram of expression with the friction member base material of the wet friction material of embodiments of the present invention.
Symbol description
[0052]
1: the friction member base material
2: inorganic filler
3: fiber
Embodiment
[0030] below, the wet friction material of embodiments of the present invention is described referring to figs. 1 through Fig. 4.
[0031] Fig. 1 (a) is the coordinate diagram of release characteristics of the wet friction material of expression embodiments of the present invention, (b) is the coordinate diagram of the release characteristics of the existing wet friction material of expression.Fig. 2 is shearing strength and comparative example relatively the coordinate diagram of expression with the friction member base material of the wet friction material of embodiments of the present invention.Fig. 3 (a) is the in-built ideograph of the existing friction member base material of expression, (b) is the in-built ideograph of friction member base material of the wet friction material of expression embodiment of the present invention.Fig. 4 is hole diameter distribute and comparative example compare the coordinate diagram of expression with the friction member base material of the wet friction material of embodiments of the present invention.
[0032] at first, with reference to table 1 proportioning material and the manufacture method that the friction member base material of the wet friction material of present embodiment constitutes is described.
[0033]
[table 1] unit: weight %
[0034] as shown in table 1, proportioning as the friction member base material of the wet friction material of present embodiment, be to use embodiment 1 to 4 kinds of proportionings of embodiment 4 part base material that creates friction,, use comparative example 1 to 5 kinds of proportionings of comparative example 5 to make the friction member base material for relatively.In the proportioning material shown in the table 1, used aromatic polyamide fiber and paper pulp as fiber, used silicious marl, graphite and carbon fiber as packing.In addition, used silicious marl as " inorganic filler A, B ", used zine oxide, used barium sulphate as " inorganic filler D " as " inorganic filler C ", used titanium oxide as " inorganic filler E ", used calcium carbonate as " inorganic filler F ".
[0035] at this, inorganic filler C (zine oxide), the inorganic filler D (barium sulphate) that uses to 4 kinds of proportioning materials of embodiment 4 as embodiment 1, and inorganic filler E (titanium oxide) have satisfied the condition of average particulate diameter such technological scheme of the present invention 1 in the scope of 0.3 μ m～10 μ m, in the scope of actual specific gravity 4～6, in the scope of Mohs hardness 3～8 fully.In addition, the average particulate diameter of inorganic filler C, D, E is the value of measuring with laser diffractometry or air penetrant method.Relative therewith, inorganic filler A, B (silicious marl) actual specific gravity is little, and inorganic filler F (calcium carbonate) actual specific gravity is also little in addition, all is discontented with the condition of unabridged version invention technological scheme 1.
[0036] these proportioning material according in the proportioning respectively of the proportional quantity shown in the table 1, be dispersed in and make the liquid slurry in the water, make the paper drying that is ferreted out from the liquid slurry make paper base material.As shown in table 1, after these paper base material 100 weight fraction have been flooded phenolic resin 35 weight fraction respectively, carry out drying, made the phenolic resin sclerosis in 30 minutes 200 ℃ of heating, made the friction member base material.The friction member base material that obtains release characteristics and intensity have been estimated respectively.The evaluation result that also comprises the porosity described later is shown in these evaluation result table of inductions the hypomere of table 1.
[0037] evaluation of release characteristics is the fan sheet that the friction member base material that obtains is cut into the regulation shape, fan type wet friction material is made on each bonding 40 on two sides at the core of the dull and stereotyped ring-type of dish size external diameter φ 176mm, internal diameter φ 154mm, presses under the about 4 seconds test conditions of 0.8MPa, load duration of oscillation at several 3 of disc, 40 ℃ of relative rotation speed 3000rpm, ATF oil temperature, ATF oil mass 2.4L/min, face and estimates.
[0038] in addition, after being cut into ring-type, a friction member base material that obtains is bonded in the two sides of the core of the dull and stereotyped ring-type of coiling size external diameter φ 176mm, internal diameter φ 154mm, the ring-type friction member that 40 oil grooves is set by pressure processing at each single face has obtained same test result when same test conditions has been estimated release characteristics.That is test result, shown below is and the common result of wet friction material that 40 oil grooves are arranged at each single face.This test result of expression in Fig. 1.
[0039] shown in Fig. 1 (a), in the wet friction material of the embodiment's 1 of present embodiment proportioning, along with the release of load, torque decays smoothly as can be seen, has obtained desirable release characteristics.Relative therewith, shown in Fig. 1 (b), in the wet friction material of the proportioning of comparative example 1, in the part that the circle by double dot dash line surrounds, produced anxious sharp cogging, can judge existing problems aspect release characteristics clearly.
[0040] in addition, the evaluation of intensity is to use the sample that the friction member base material that obtains is cut into 20mm * 20mm, respectively the multi-disc sample has been measured the stretching shearing strength with draw speed 5mm/min.In Fig. 2, represent measurement result.As shown in Figure 2, the embodiment 1 of present embodiment is to the friction member base material of 4 kinds of proportionings of embodiment 4, have and the equal above shearing strength of the friction member base material of the proportioning of comparative example 2 and comparative example 5, than comparative example 1, comparative example 3, and the friction member base material of the proportioning of comparative example 4 have higher shearing strength.
[0041] like this, as evaluation result be, the embodiment 1 of present embodiment is to the friction member base material of 4 kinds of proportionings of embodiment 4, compare with comparative example 1 to the friction member base material of the proportioning of comparative example 5, under the situation that has adopted fan type wet friction material and ring-type friction member, have excellent release characteristics, in addition, might as well aspect shearing strength.Particularly, shown in the hypomere of table 1, average particulate diameter be that 0.6 μ m, actual specific gravity are 5.5, Mohs hardness is 5 zine oxide (inorganic filler C), perhaps average particulate diameter is that 10 μ m, actual specific gravity are 4.2, Mohs hardness is that 3 barium sulphate (inorganic filler D) uses as inorganic filler, and is obviously better.
[0042] as this reason, can think shown in Fig. 3 (a), comparative example 1 is to the existing friction member base material 6 of the proportioning of comparative example 5, because the actual specific gravity of used inorganic filler 7 is little, volume is big, so be embedded between the fiber 3, hole diameter 8 diminishes, relative therewith, shown in Fig. 3 (b), in embodiment 1 to the friction member base material 1 of embodiment 4 proportioning, because the actual specific of used inorganic filler 2 is great, average particulate diameter is little, so inorganic filler 2 is attached between fiber 3 and the fiber 3, when the hardening of resin that has flooded with fiber 3 each other in conjunction with thereby the effect that obtains to make the intensity of friction member base material 1 to improve, simultaneously because hole diameter 5 becomes big.
[0043] therefore, the hole diameter of the friction member base material of the embodiment 1 of present embodiment and embodiment's 2 proportioning is distributed, distributing with the hole diameter of the friction member base material of the proportioning of comparative example 1 and comparative example 4 compares.Hole diameter distributes and measures according to mercury penetration method.In Fig. 4, represent measurement result.As shown in Figure 4, the peak that the hole diameter of the friction member base material of embodiment 1 and embodiment's 2 proportioning distributes is positioned at the big side of hole diameter, relative therewith, the peak that the hole diameter of the friction member base material of the proportioning of comparative example 1 and comparative example 4 distributes is positioned at the following position of hole diameter 1 μ m.
[0044] in addition, the hole diameter of the friction member base material of embodiment 1 and embodiment's 2 proportioning distributes, and distributing with the hole diameter of the friction member base material of the proportioning of comparative example 1 and comparative example 4 compares, and the zone is wide.And the peak that hole diameter distributes is positioned at for the friction member base material of embodiment 1 proportioning near the 12 μ m, is positioned at for the friction member base material of embodiment 2 proportioning near the 3.5 μ m.Therefore, the peak that distributes of the hole diameter measured by mercury penetration method of the friction member base material of embodiment 1 and embodiment's 2 proportioning is in the scope of 1 μ m～20 μ m.
[0045] thus, because increase, so release characteristics improves from the speed of rubbing surface absorption ATF.And then, because increase, not only can reduce drag torque, and become the also excellent wet friction material of positive gradient of μ-V characteristic from the speed of rubbing surface absorption ATF.
[0046] in the present embodiment, although understand to use the example of phenolic resin powder, but also can use with sex change phenolic resin, epoxy resin is as the powder of other thermosetting resin of representative or be not pulverous thermosetting resin as thermosetting resin.Particularly, these phenolic resin, sex change phenolic resin, epoxy resin have excellent heat resistance simultaneously because of obtaining easily, are desirable so conduct is used as the thermosetting resin of the material of wet friction material.
[0047] in addition, in the present embodiment, although understand that the number of groves of single face is the situation of 40 wet friction material, but number of groves is not to be limited to 40, can correspondingly set suitable bar number for the characteristic that requires.
[0048] and then, in the present embodiment, copy the paper body although understand to make to contain fibre content and to comprise inorganic filler at interior packing composition, by this being copied carry out behind the paper body heat of immersion hardening resin the create friction situation of part base material of hot hardening, but also can copy paper body heat of immersion hardening resin after having added to what the part of fibre content and packing composition copied that paper forms, or make that paper body dipping has added as the thermosetting resin of the inorganic filler of the remainder of packing composition and hot hardening creates friction part base material to the part of fibre content and packing composition copying of copying that paper forms by making as the inorganic filler of the remainder of packing composition.
[0049] implementing when of the present invention,, also be not limited to present embodiment the composition of the other parts of wet friction material, composition, proportional quantity, material, size, manufacture method etc.
[0050] in addition, the numerical value of enumerating in the present embodiment is not the numerical value of expression critical value, but the numerical value of the preferred value that expression is suitable for implementing, so, even above-mentioned numerical value is carried out some changes, neither negate to implement.
Claims (4)
1. wet friction material, described wet friction material is with by making the friction member base material that paper body heat of immersion hardening resin and hot hardening form of copying that contains fibre content and packing composition, be bonded on the single face of core of dull and stereotyped ring-type or the two sides and constitute, it is characterized in that
To copy the paper body all with respect to above-mentioned, in the scope of 5 weight %～40 weight %, in above-mentioned packing composition, contain one or more the inorganic filler of average particulate diameter in the scope of 0.3 μ m～10 μ m, in the scope of actual specific gravity 4～6, in the scope of Mohs hardness 3～8.
2. wet friction material, described wet friction material is to copy paper body heat of immersion hardening resin after having added as the inorganic filler of the remainder of above-mentioned packing composition to what the part of fibre content and packing composition copied that paper forms by making, perhaps by the paper body dipping of copying that the part of fibre content and packing composition is copied that paper forms has been added as the thermosetting resin of the inorganic filler of the remainder of above-mentioned packing composition and the friction member base material that hot hardening forms, be bonded on the single face of core of dull and stereotyped ring-type or the two sides and constitute, it is characterized in that
Above-mentioned inorganic filler is one or more the inorganic filler of average particulate diameter in the scope of 0.3 μ m～10 μ m, in the scope of actual specific gravity 4～6, in the scope of Mohs hardness 3～8, is to be added in above-mentioned scope of copying all 5 weight %～40 weight % of paper body.
3. wet friction material as claimed in claim 1 or 2, it is characterized in that, above-mentioned fibre content is in the scope of 30 weight %～60 weight % at the above-mentioned containing ratio of copying in the paper body, and above-mentioned packing composition is in the scope of 40 weight %～70 weight % at the above-mentioned containing ratio of copying in the paper body.
4. as each the described wet friction material in the claim 1 to 3, it is characterized in that, the peak that the hole diameter of being measured by mercury penetration method of above-mentioned friction member base material distributes is in the scope of 1 μ m～20 μ m, and the porosity of above-mentioned friction member base material is in 30%～70% scope.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-210090 | 2007-08-10 | ||
| JP2007210090 | 2007-08-10 | ||
| JP2007210090 | 2007-08-10 | ||
| JP2008159914A JP5334466B2 (en) | 2007-08-10 | 2008-06-19 | Wet friction material |
| JP2008159914 | 2008-06-19 | ||
| JP2008-159914 | 2008-06-19 |
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| Publication Number | Publication Date |
|---|---|
| CN101363492A true CN101363492A (en) | 2009-02-11 |
| CN101363492B CN101363492B (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101453450A Expired - Fee Related CN101363492B (en) | 2007-08-10 | 2008-08-07 | Wet friction material |
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| JP (1) | JP5334466B2 (en) |
| CN (1) | CN101363492B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104622769A (en) * | 2013-11-14 | 2015-05-20 | 金红叶纸业集团有限公司 | Body refreshing article and preparation method thereof |
| CN109477534A (en) * | 2016-07-26 | 2019-03-15 | 三菱电机株式会社 | The liner of brake |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200124126A1 (en) * | 2018-10-22 | 2020-04-23 | Schaeffler Technologies AG & Co. KG | Wet friction material with coated filler particles |
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| JPS5785877A (en) * | 1980-11-18 | 1982-05-28 | Teijin Ltd | Friction material |
| JPS63167134A (en) * | 1986-12-29 | 1988-07-11 | Hitachi Chem Co Ltd | Friction material and its manufacture |
| JP2915444B2 (en) * | 1989-10-26 | 1999-07-05 | 昭和高分子株式会社 | Wet friction material |
| US5576358A (en) * | 1995-02-03 | 1996-11-19 | Alliedsignal Inc. | Composition for use in friction materials and articles formed therefrom |
| JPH09104764A (en) * | 1995-10-11 | 1997-04-22 | Hitachi Chem Co Ltd | Wet friction material |
| JPH1161105A (en) * | 1997-08-21 | 1999-03-05 | Aisin Chem Co Ltd | Friction material |
| US6630416B1 (en) * | 2000-11-06 | 2003-10-07 | Borgwarner Inc. | Friction material formed by deposition of friction modifiers on high, wet energy carbonaceous friction materials |
| JP2003322185A (en) * | 2002-04-26 | 2003-11-14 | Dainatsukusu:Kk | Method of manufacturing frictional disc |
-
2008
- 2008-06-19 JP JP2008159914A patent/JP5334466B2/en active Active
- 2008-08-07 CN CN2008101453450A patent/CN101363492B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104622769A (en) * | 2013-11-14 | 2015-05-20 | 金红叶纸业集团有限公司 | Body refreshing article and preparation method thereof |
| CN109477534A (en) * | 2016-07-26 | 2019-03-15 | 三菱电机株式会社 | The liner of brake |
| CN109477534B (en) * | 2016-07-26 | 2020-10-23 | 三菱电机株式会社 | Lining of brake |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009062514A (en) | 2009-03-26 |
| JP5334466B2 (en) | 2013-11-06 |
| CN101363492B (en) | 2011-06-15 |
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