CN114876990A - Paper-based friction material of alcohol/water-soluble phenolic resin mixed adhesive and manufacturing method and application thereof - Google Patents
Paper-based friction material of alcohol/water-soluble phenolic resin mixed adhesive and manufacturing method and application thereof Download PDFInfo
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- CN114876990A CN114876990A CN202210609461.3A CN202210609461A CN114876990A CN 114876990 A CN114876990 A CN 114876990A CN 202210609461 A CN202210609461 A CN 202210609461A CN 114876990 A CN114876990 A CN 114876990A
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- phenolic resin
- paper
- alcohol
- water
- friction material
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 239000005011 phenolic resin Substances 0.000 title claims abstract description 109
- 229920001568 phenolic resin Polymers 0.000 title claims abstract description 107
- 239000002783 friction material Substances 0.000 title claims abstract description 74
- 239000000853 adhesive Substances 0.000 title claims abstract description 51
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 51
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 26
- 239000003292 glue Substances 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims description 48
- 238000007598 dipping method Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 29
- 238000007731 hot pressing Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 19
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000003921 oil Substances 0.000 claims description 11
- 239000005995 Aluminium silicate Substances 0.000 claims description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 9
- 235000012211 aluminium silicate Nutrition 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 8
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 8
- 239000006229 carbon black Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 239000010436 fluorite Substances 0.000 claims description 8
- 244000226021 Anacardium occidentale Species 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 229920006231 aramid fiber Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 235000020226 cashew nut Nutrition 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 235000014571 nuts Nutrition 0.000 claims description 4
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 239000002383 tung oil Substances 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000012783 reinforcing fiber Substances 0.000 abstract description 16
- 238000005470 impregnation Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 238000005303 weighing Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000003995 emulsifying agent Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 238000004537 pulping Methods 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 2
- 235000009120 camo Nutrition 0.000 description 2
- 235000005607 chanvre indien Nutrition 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000011487 hemp Substances 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- RCHKEJKUUXXBSM-UHFFFAOYSA-N n-benzyl-2-(3-formylindol-1-yl)acetamide Chemical compound C12=CC=CC=C2C(C=O)=CN1CC(=O)NCC1=CC=CC=C1 RCHKEJKUUXXBSM-UHFFFAOYSA-N 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
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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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
-
- 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
- F16D2200/0034—Materials; Production methods therefor non-metallic
-
- 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
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0052—Carbon
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a paper-based friction material of an alcohol/water-soluble phenolic resin mixed adhesive, a manufacturing method and application thereof, wherein the paper-based friction material comprises the following components in percentage by weight: 24-36% of reinforcing fibers; 5-15% of a friction performance regulator, 15-35% of a filler and 5-10% of an alcohol-soluble phenolic resin adhesive; 30-35% of water-soluble phenolic resin. According to the invention, base paper impregnation is realized by a manual impregnation or automatic glue spraying mode, and the paper-based friction material with excellent friction performance is prepared. The problems of safety factor and environmental management caused by singly using the traditional alcohol-soluble phenolic resin are solved, and the performance of the paper-based friction material is improved.
Description
Technical Field
The invention relates to the technical field of paper-based friction materials, in particular to an alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material and a manufacturing method and application thereof.
Background
Document 1, "chinese patent publication No. CN 110004760A" discloses a production process of a composite emulsifier, a phenolic resin aqueous emulsion, and a paper-based friction material. The method is characterized in that a composite emulsifier is added into modified phenolic resin, and the phenolic resin emulsifier has the problems of impregnation impermeability, non-uniform dispersion and the like for impregnation of high-density base paper.
Document 2, "chinese patent publication No. CN103030922B," shows that the water-soluble phenol resin has a decomposition temperature of about 250 ℃, low heat resistance, and high brittleness. The use of water-soluble phenolic resin alone as a binder also affects the friction performance of paper-based friction materials.
With the increase of the demand of the paper-based friction material, the consumption of the traditional alcohol-soluble phenolic resin is gradually increased, and because the alcohol organic solvent is used, in the drying process, the organic solvent steam and the air are mixed to reach the explosion concentration, and the explosion is immediately caused when meeting a fire source. The composite emulsifier adopted in the patent applications can not be completely applied to the paper-based friction material, particularly, the alcohol solvent needs to be recovered and comprehensively treated due to the requirement of environmental management, and the production cost of manufacturing enterprises is increased.
Although the water-soluble resin is environment-friendly and low in cost, the water-soluble resin also has the use defect of low strength, so that a method is found for reasonably applying the respective advantages of the water-soluble phenolic resin and the alcohol-soluble phenolic resin and exerting the respective advantages.
Disclosure of Invention
In order to avoid the defects of the prior art, the invention provides an alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material and a manufacturing method and application thereof. For water-soluble phenolic resin, base paper impregnation is realized in an automatic glue spraying mode, and a paper-based friction material with excellent friction performance is prepared in a mode of mixing two phenolic resin adhesives. The friction material prepared by using the traditional alcohol-soluble phenolic resin alone has the performance which can not meet the use requirement, and the problems of unsafe production factors and environmental management are solved. The most important is to solve the problem that the strength of the paper-based friction material is low due to the high volatility of alcohol in the process of curing and drying by singly using the traditional alcohol-soluble phenolic resin.
In order to achieve the purpose, the invention adopts the following technical scheme:
an alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material comprises the following components in percentage by weight:
the sum of the mass percentages is 100 percent.
As a further improvement of the invention, the paper-based friction material phenolic resin adhesive is water-soluble phenolic resin and alcohol-soluble phenolic resin, and the two adhesives are independently used according to a certain proportion in different manufacturing procedures; the phenolic resin adhesive comprises 5-10% of alcohol-soluble phenolic resin and 30-35% of water-soluble resin adhesive.
As a further improvement of the invention, in the phenolic resin adhesive, the alcohol-soluble phenolic resin is one of cashew nut shell oil modified phenolic resin, melamine-cashew nut shell oil modified phenolic resin and tung oil modified phenolic resin; the water-soluble phenolic resin is thermosetting phenolic resin with a plurality of hydroxymethyl groups, which is generated by the reaction of formaldehyde and phenol in a molar ratio of 1.0-1.5 under an alkaline (inorganic base or organic base) catalyst. The solid content of the composite material is 30-70%.
As a further improvement of the invention, the friction performance regulator is one or two of alumina and graphite; the filler is one or more of diatomite, barium sulfate, magnetite, fluorite powder, carbon black, kaolin and calcium carbonate.
As a further improvement of the invention, the reinforced fiber is one or a combination of several of paper fiber, glass fiber, carbon fiber, aramid fiber, basalt fiber and fibrilia.
A method for manufacturing an alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material comprises the following steps:
weighing the reinforced fiber, the friction performance regulator, the filler and the alcohol-soluble phenolic resin adhesive according to the weight percentage;
mixing the reinforced fiber, the friction performance regulator, the filler and the alcohol-soluble phenolic resin adhesive, adding water, stirring to uniformly disperse the mixture, papermaking in a liquid-solid separation mode to form base paper of the friction material, and drying;
soaking the base paper in a water-soluble phenolic resin solution in a manual gum dipping or automatic gum spraying mode, and then drying; and carrying out hot-pressing curing on the dried paper material to obtain a high-quality paper-based friction material which has excellent mechanical strength and frictional wear performance and can be used for preparing a friction plate of a transmission of a high-grade vehicle.
As a further improvement of the invention, the drying process of the gum dipping treatment comprises the following steps:
drying for 2 hours in a drying oven at the temperature of 60-90 ℃, and then cooling for 0.5-1 hour in air; or,
and secondly, naturally airing for 24-48 hours at room temperature.
As a further improvement of the invention, the hot-pressing time of the hot-pressing curing is 140-300 s, the curing temperature is 140-200 ℃, and the curing pressure is 3-8 MPa.
Compared with the prior art, the application of the alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material in the preparation of the friction plate has the following advantages:
the invention mainly aims to adopt alcohol/water-soluble phenolic resin as a mixed adhesive for a paper-based friction material, solve the problems of environmental protection and treatment in the prior art, and ensure that the paper-based friction material has more excellent strength and friction performance. The alcohol-soluble phenolic resin adhesive with a certain proportion is added in the process of filler preparation, and is uniformly distributed on the surface of the fiber in the base paper in the process of papermaking. And then uniformly dispersing the water-soluble phenolic resin in the paper material in a manual gum dipping or automatic gum spraying mode. Compared with the traditional method of singly using the alcohol-soluble phenolic resin, the compression resistance of the paper-based friction material taking the water-soluble phenolic resin as the matrix is improved by 10 percent, the friction and wear properties are superior to those of the traditional alcohol-soluble phenolic resin and the water-soluble phenolic resin, and the paper-based friction material can be applied to the fields of traditional engineering machinery, automobiles and the like which meet the product performance requirements. Besides the function of the friction performance regulator and the filler, the cost of the material is also reduced.
The paper-based friction material manufacturing method of the invention firstly disperses the reinforcing fiber, the friction performance regulator, the filler, the alcohol-soluble phenolic resin adhesive and the water uniformly in a slurry tank according to the specified concentration to prepare the wet base paper of the paper-based friction material. And drying the wet base paper, uniformly dispersing the water-soluble phenolic resin in the paper after drying in a gum dipping or gum spraying mode, and finally performing a hot pressing process after drying to obtain the paper-based friction material. The novel system paper-based friction material is obtained by changing the traditional single use of alcohol or water-soluble phenolic resin into the mixed use of alcohol/water-soluble phenolic resin, the whole process can solve the safety problem of an alcohol solvent on human bodies, environment and other aspects in the traditional process, can also reduce the production cost of completely using the alcohol-soluble phenolic resin, and can also ensure that the friction material has better performance.
Further, the operation of manual gum dipping or automatic gum spraying is carried out, the gummed paper-based friction material can be dried in the air or in a drying box under natural conditions, and if the paper-based friction material is dried in the drying box, the paper-based friction material needs to be cooled. And carrying out hot-pressing curing treatment after cooling to obtain the paper-based friction material.
The test result of the paper-based friction material shows that the dynamic friction coefficient is relatively stable without large change, thereby showing that the dynamic friction coefficient of the material has good stability.
Drawings
FIG. 1 is a graph showing the fluctuation of the dynamic friction coefficient of the paper-based friction material prepared in example 1 of the present invention during 1000 wear rate tests.
FIG. 2 is a graph showing the fluctuation of the dynamic friction coefficient of the paper-based friction material prepared in example 2 of the present invention during 1000 wear rate tests.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from examples of the invention without making any inventive step, are within the scope of the invention.
The invention provides an alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material, which comprises the following components in percentage by weight:
24-36% of reinforcing fiber, 5-15% of friction performance regulator, 15-35% of filler, 5-10% of alcohol-soluble phenolic resin adhesive and 35-45% of phenolic resin matrix, wherein the sum of the mass percentages is 100%.
The phenolic resin adhesive of the paper-based friction material is water-soluble phenolic resin and alcohol-soluble phenolic resin, and the two adhesives are independently used according to a certain proportion in different manufacturing processes; the phenolic resin adhesive comprises 5-10% of alcohol-soluble phenolic resin and 30-35% of water-soluble resin adhesive.
The alcohol-soluble phenolic resin in the phenolic resin adhesive is one of cashew nut shell oil modified phenolic resin, melamine-cashew nut shell oil modified phenolic resin and tung oil modified phenolic resin; the water-soluble phenolic resin is thermosetting phenolic resin with hydroxymethyl, which is generated by the reaction of formaldehyde and phenol in a molar ratio of 1.0-1.5 under an alkaline catalyst, and the solid content of the thermosetting phenolic resin is 30-70%.
The reinforcing fiber can be one or the combination of several of paper fiber, glass fiber, carbon fiber, aramid fiber, basalt fiber and hemp fiber.
The friction performance regulator is one or two of alumina and graphite; the filler is one or more of diatomite, barium sulfate, magnetite, fluorite powder, carbon black, kaolin and calcium carbonate. Specifically, the aluminum oxide has a friction coefficient enhancing effect, the graphite has a friction coefficient weakening effect, and the aluminum oxide and the graphite are matched under the condition of dosage to realize the required friction performance parameters.
The second purpose of the invention is to provide a manufacturing method of the alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material, which comprises the following steps:
step 1: weighing 24-36% of reinforcing fiber, 5-15% of friction performance regulator, 15-35% of filler and 5-10% of alcohol-soluble phenolic resin adhesive according to a proportion.
Step 2: adding water into reinforcing fiber, friction performance regulator, filler and alcohol-soluble phenolic resin adhesive in a pulping tank, stirring to uniformly disperse the water, forming raw paper of the friction material in a liquid-solid separation mode, and then drying.
And step 3: the method comprises the steps of dipping base paper in a manner of manual gum dipping or automatic gum spraying, wherein the content of a water-soluble phenolic resin matrix is 30-35%, and then drying.
And 4, step 4: and carrying out hot-pressing curing on the gummed and dried paper material, wherein the hot-pressing time is 140-300 s, the curing temperature is 140-200 ℃, and the curing pressure is 3-8 MPa. And then, the paper is subjected to the procedures of blanking, ring sticking, hot pressing, grooving and the like to prepare the required friction plate.
The drying process after gum dipping in the step 3 is as follows:
drying for 2 hours in a drying oven at the temperature of 60-90 ℃, and then cooling for 0.5-1 hour in air;
② naturally airing for 24-48 h at room temperature (the room temperature is more than 15 ℃ under the conventional condition).
The third purpose of the invention is to use the paper-based friction material taking the alcohol/water-soluble phenolic resin as the matrix in the preparation of the friction plate.
The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.
Example 1 (0.6 mm thick paper):
weighing the following materials in parts by weight: 12g of carbon fiber, 12g of aramid fiber, 12g of paper fiber, 10.6g of diatomite, 7.7g of alumina, 5.4g of barium sulfate, 5.4g of magnetite, 5.4g of fluorite powder, 1.3g of graphite, 1.3g of carbon black, 10.3g of alcohol-soluble cashew nut shell oil phenolic resin adhesive, 8.6g of kaolin and 5.7g of calcium carbonate.
And step two, putting the fibers, the friction performance regulator, the filler, the alcohol-soluble phenolic resin adhesive and the like into a slurry tank, adding water, stirring for 2-3 min, uniformly dispersing, and ensuring that the concentration of the slurry is close to 2%. The mixed slurry was subjected to liquid-solid separation by a predetermined filtration apparatus to form a wet friction material base paper. The filtering device is a layer of 300-mesh nylon mesh cloth and 2 layers of 800g/m 2 The nylon felt is combined to ensure that the material leakage rate is less than 12 percent. And (3) drying the dehydrated wet friction material base paper in a drying device at the temperature of 80 ℃ for 3h, and removing residual water to ensure that the water content is below 3%.
Step three, in the embodiment 1, a water-soluble phenolic resin is adopted, the solid content is 78%, the gum dipping coefficient is 3.7, the concentration is 11.6%, a test sample is used for gum dipping, the resin content after curing is 29-30%, the surface color is uniform, and the process requirement is met. And (3) adopting a gum dipping coefficient of 3.7 and a concentration of 11.6% to prepare the glue, and waiting for 3-4 h after the glue is prepared, so that the resin and the hydrosolvent are uniformly mixed and no layering phenomenon exists. The base paper is manually dipped according to the weight of 3.7. After the impregnation and gluing are finished, the paper is placed at the room temperature of more than 15 ℃ and naturally dried for 48 hours.
And step four, carrying out hot-pressing curing on the impregnated paper for 300s, wherein the curing temperature is 160 ℃, and the curing pressure is 3 MPa. Obtaining 0.6mm paper, and then performing the procedures of blanking, ring sticking, hot pressing, grooving and the like on the paper to prepare the required friction plate.
Example 2 (paper 0.6mm thick):
weighing the following materials in parts by weight: 12g of carbon fiber, 12g of aramid fiber, 12g of paper fiber, 10.6g of diatomite, 7.7g of alumina, 5.4g of barium sulfate, 5.4g of magnetite, 5.4g of fluorite powder, 1.3g of graphite, 1.3g of carbon black, 10.3g of alcohol-soluble cashew nut shell oil phenolic resin adhesive, 8.6g of kaolin and 5.7g of calcium carbonate.
Step two, mixing the fiber, the friction performance regulator, the filler and the alcohol-soluble phenolAnd (3) putting the aldehyde resin adhesive and the like into a slurry tank, adding water, stirring for 2-3 min, uniformly dispersing, and ensuring that the concentration of the slurry is close to 2%. The mixed slurry was subjected to liquid-solid separation by a predetermined filtration apparatus to form a wet friction material base paper. The filtering device is a layer of 300-mesh nylon mesh cloth and 2 layers of 800g/m 2 The nylon felt is combined to ensure that the material leakage rate is less than 12 percent. And (3) drying the dehydrated wet friction material base paper in a drying device at the temperature of 80 ℃ for 3h, and removing residual water to ensure that the water content is below 3%.
Step three, in the embodiment 2, water-soluble phenolic resin II is adopted, the solid content is 65%, the gum dipping coefficient is 3.7, the concentration is 11.6%, a test sample is used for gum dipping, the resin content after curing is 29-30%, the surface color is uniform, and the process requirement is met. And (3) adopting a gum dipping coefficient of 3.7 and a concentration of 11.6% to prepare the glue, and waiting for 3-4 h after the glue is prepared, so that the resin and the hydrosolvent are uniformly mixed and no layering phenomenon exists. Automatically spraying glue with the weight coefficient of 3.7 of the base paper, after the glue is soaked, putting the paper material in a drying oven at 80 ℃, drying for 2h, and then cooling for 1h at room temperature after drying.
And step four, carrying out hot-pressing curing on the impregnated paper for 300s, wherein the curing temperature is 160 ℃, and the curing pressure is 3 MPa. Obtaining 0.6mm paper, and then performing the procedures of blanking, ring sticking, hot pressing, grooving and the like on the paper to prepare the required friction plate.
Comparative example:
the paper-based friction material prepared by the gum dipping process and parameters of the alcohol-soluble phenolic resin adhesive is compared with the paper-based friction material prepared by the comparative example 1.
The paper-based friction material prepared by the gum dipping process and parameters of the water-soluble phenolic resin adhesive is compared with the comparative example 2.
The paper-based friction material samples prepared in the examples 1 and 2 and the comparative sample are subjected to performance tests, and the specific test method is as follows:
the density, porosity, coefficient of dynamic friction and wear rate after 1000 times of bonding of different samples were tested using GB/T13826-2008 wet (non-metallic) friction material, and the test results are shown in Table 1.
Table 1 test results of examples 1 and 2 and comparative example
As can be seen from the results of the tests in Table 1, the paper-based friction material prepared by using the alcohol/water-soluble phenolic resin mixture has better frictional wear performance than the alcohol or water-soluble phenolic resin alone, and the porosity and density are close to those of the comparative examples of the alcohol or water-soluble phenolic resin.
Through the graph 1 and the graph 2, the dynamic friction coefficient of the paper-based friction material is stable and does not change greatly in the wear rate test process of 1000 times of the friction plates prepared in the embodiment 1 and the embodiment 2, so that the dynamic friction coefficient of the material has good stability.
Example 3
A method for manufacturing an alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material comprises the following steps:
step 1: weighing 25% of reinforcing fiber (paper fiber and carbon fiber), 5% of friction performance regulator (alumina and graphite), 35% of filler (barium sulfate, calcium carbonate and kaolin) and 5% of alcohol-soluble tung oil modified phenolic resin adhesive according to the proportion.
And 2, step: the reinforced fiber, the friction performance regulator, the filler and the alcohol-soluble oil-through modified phenolic resin adhesive are placed in a stirring tank with water, stirred to be uniformly dispersed, wet friction material base paper is formed in a liquid-solid separation mode, and then drying treatment is carried out.
And step 3: and performing gum dipping coefficient and concentration experiments on the base paper to meet the requirement of the content of the water-soluble phenolic resin matrix. After parameters are determined, the base paper is treated by dipping in glue by a manual dipping mode, wherein the content of the water-soluble phenolic resin matrix is 30%, and then the base paper is dried.
And 4, step 4: and carrying out hot-pressing curing on the paper material subjected to gum dipping and drying, wherein the hot-pressing time is 250s, the curing temperature is 160 ℃, and the curing pressure is 3 MPa. And then, the paper is subjected to the procedures of blanking, ring sticking, hot pressing, grooving and the like to prepare the required friction plate.
The drying process after gum dipping in the step 3 is as follows:
drying for 2 hours at 80 ℃ in a drying oven, and then cooling for 0.8 hour in air.
Example 4
A method for manufacturing a paper-based friction material with alcohol/water-soluble phenolic resin as a matrix comprises the following steps:
step 1: weighing 30% of reinforcing fiber (paper fiber, aramid fiber, basalt fiber and fibrilia), 5% of friction performance regulator (alumina and graphite), 25% of filler (carbon black, fluorite powder, kaolin and calcium carbonate) and 5% of alcohol-soluble cashew nut shell oil modified phenolic resin adhesive according to a proportion.
Step 2: the preparation method comprises the steps of putting reinforcing fibers, a friction performance regulator, a filler, an alcohol-soluble phenolic resin adhesive and the like into a pulping tank with water, stirring to uniformly disperse the reinforcing fibers, the friction performance regulator, the filler, the alcohol-soluble phenolic resin adhesive and the like, forming wet friction material base paper in a liquid-solid separation mode, and then drying.
And step 3: and performing gum dipping coefficient and concentration experiments on the base paper to meet the requirement of the content of the water-soluble phenolic resin matrix. After parameters are determined, the base paper is subjected to gum dipping treatment in an automatic glue spraying mode with the water-soluble phenolic resin matrix content of 35%, and then drying treatment is carried out.
And 4, step 4: and carrying out hot-pressing curing on the paper material subjected to gum dipping and drying, wherein the hot-pressing time is 300s, the curing temperature is 190 ℃, and the curing pressure is 5 MPa. And then, the paper material is subjected to the procedures of blanking, ring sticking, hot pressing, grooving and the like to prepare the required friction plate.
The drying process after gum dipping in the step 3 is as follows:
② naturally airing for 48 hours at room temperature (the room temperature is more than 15 ℃ under the conventional condition).
Example 5
A method for manufacturing a paper-based friction material with alcohol/water-soluble phenolic resin as a matrix comprises the following steps:
step 1: weighing 24% of reinforcing fiber (paper fiber, glass fiber, carbon fiber and hemp fiber), 7.5% of friction performance regulator (alumina and graphite), 21% of filler (carbon black, fluorite powder, kaolin and calcium carbonate) and 7.5% of alcohol-soluble melamine-cashew nut shell oil phenolic resin adhesive according to the proportion.
Step 2: the preparation method comprises the steps of putting the reinforcing fibers, the friction performance regulator, the filler and the alcohol-soluble phenolic resin adhesive into a pulping tank with water, stirring to uniformly disperse the reinforcing fibers, the friction performance regulator, the filler and the alcohol-soluble phenolic resin adhesive, forming wet friction material base paper in a liquid-solid separation mode, and then drying.
And 3, step 3: and performing gum dipping coefficient and concentration experiments on the base paper to meet the requirement of the content of the water-soluble phenolic resin matrix. After parameters are determined, the base paper is treated by dipping in glue in a manual dipping mode, wherein the content of the water-soluble phenolic resin matrix is 40%, and then the base paper is dried.
And 4, step 4: and carrying out hot-pressing curing on the paper material subjected to gum dipping and drying, wherein the hot-pressing time is 300s, the curing temperature is 190 ℃, and the curing pressure is 5 MPa. And then, the paper is subjected to the procedures of blanking, ring sticking, hot pressing, grooving and the like to prepare the required friction plate.
The drying process after gum dipping in the step 3 is as follows:
drying for 2 hours at 60 ℃ in a drying oven, and then cooling for 0.5 hour in air.
Example 6
A method for manufacturing a paper-based friction material with alcohol/water-soluble phenolic resin as a matrix comprises the following steps:
step 1: weighing 36% of reinforcing fiber (aramid fiber, basalt fiber and fibrilia), 5% of friction performance regulator (alumina and graphite), 18% of filler (carbon black, mineral powder, barium sulfate, magnetite, fluorite powder, kaolin and calcium carbonate) and 8% of alcohol-soluble cashew nut shell oil modified phenolic resin adhesive according to the proportion.
Step 2: the preparation method comprises the steps of putting the reinforcing fibers, the friction performance regulator, the filler and the alcohol-soluble phenolic resin adhesive into a pulping tank with water, stirring to uniformly disperse the reinforcing fibers, the friction performance regulator, the filler and the alcohol-soluble phenolic resin adhesive, forming wet friction material base paper in a liquid-solid separation mode, and then drying.
And step 3: and performing gum dipping coefficient and concentration experiments on the base paper to meet the requirement of the content of the water-soluble phenolic resin matrix. After parameters are determined, the base paper is subjected to gum dipping treatment in a manual gum dipping mode, wherein the content of the water-soluble phenolic resin matrix is 33%, and then the base paper is subjected to drying treatment.
And 4, step 4: and carrying out hot-pressing curing on the paper material subjected to gum dipping and drying, wherein the hot-pressing time is 200s, the curing temperature is 160 ℃, and the curing pressure is 4 MPa. And then, the paper is subjected to the procedures of blanking, ring sticking, hot pressing, grooving and the like to prepare the required friction plate.
The drying process after gum dipping in the step 3 is as follows:
drying for 2 hours at 80 ℃ in a drying oven, and then cooling for 0.8 hour in air.
Therefore, the manufacturing method of the invention can effectively solve the environmental pollution, improve the working environment and reduce the cost. The prepared paper-based friction material has good friction and wear properties, and the water/alcohol-soluble phenolic resin mixed adhesive paper-based friction material can be applied to friction plate products meeting the requirements of working conditions.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An alcohol/water-soluble phenolic resin mixed adhesive paper-based friction material is characterized in that: comprises the following components in percentage by weight:
the water-soluble phenolic resin is thermosetting phenolic resin with hydroxymethyl, which is generated by the reaction of formaldehyde and phenol in a molar ratio of 1.0-1.5 under an alkaline catalyst.
2. The alcohol/water soluble phenolic resin mixed binder paper-based friction material of claim 1, wherein: the alcohol-soluble phenolic resin in the phenolic resin adhesive is one of cashew nut shell oil modified phenolic resin, melamine-cashew nut shell oil modified phenolic resin and tung oil modified phenolic resin.
3. The alcohol/water soluble phenolic resin mixed binder paper-based friction material of claim 1, wherein: the solid content of the water-soluble phenolic resin is 30-70%.
4. The alcohol/water soluble phenolic resin mixed binder paper-based friction material of claim 1, wherein: the friction performance regulator is one or two of aluminum oxide and graphite.
5. The alcohol/water soluble phenolic resin mixed binder paper-based friction material of claim 1, wherein: the filler is one or more of diatomite, barium sulfate, magnetite, fluorite powder, carbon black, kaolin and calcium carbonate.
6. The alcohol/water soluble phenolic resin mixed binder paper-based friction material of claim 1, wherein: the reinforced fiber is one or a combination of more of paper fiber, glass fiber, carbon fiber, aramid fiber, basalt fiber and fibrilia.
7. The method for manufacturing a water/alcohol-soluble phenol resin mixed binder paper-based friction material according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
mixing the reinforced fiber, the friction performance regulator, the filler and the alcohol-soluble phenolic resin, adding water, stirring to uniformly disperse the mixture, papermaking in a liquid-solid separation mode to form base paper of the friction material, and drying;
soaking the water-soluble phenolic resin glue in the base paper in a manual glue soaking mode or an automatic glue spraying mode, and then drying; and carrying out hot-pressing curing on the dried paper material to obtain the paper-based friction material which has good friction and wear properties and is used for manufacturing a friction plate.
8. The manufacturing method according to claim 7, characterized in that: the gum dipping treatment and drying process comprises the following steps:
firstly, drying for 1-3 hours at the temperature of 60-90 ℃, and then cooling for 0.5-1 hour in the air; or;
and secondly, naturally airing for 24-48 hours at room temperature.
9. The manufacturing method according to claim 7, characterized in that: the hot-pressing time of hot-pressing curing is 140-300 s, the curing temperature is 140-200 ℃, and the curing pressure is 3-8 MPa.
10. Use of an alcohol/water soluble phenolic resin mixed binder paper based friction material according to any one of claims 1 to 6 in the manufacture of a friction plate.
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| JPH0959599A (en) * | 1995-08-25 | 1997-03-04 | Aisin Chem Co Ltd | Wet frictional material |
| CN101649035A (en) * | 2009-09-21 | 2010-02-17 | 江西科技师范学院 | Water-soluble toughened phenolic resin and preparation method thereof |
| CN107057275A (en) * | 2017-04-21 | 2017-08-18 | 来安县隆华摩擦材料有限公司 | A kind of preparation method of car clutch face sheet nano barium titanate aluminium/composite modified water soluble phenol resin of phosphorus boron molybdenum silicon |
| CN109334179A (en) * | 2018-08-14 | 2019-02-15 | 烟台柳鑫新材料科技有限公司 | A kind of antistatic self-lubricating type PCB cover plate for drilling hole and preparation method thereof |
| EP3597956A1 (en) * | 2018-07-18 | 2020-01-22 | LinkWin Technology Co., Ltd. | Friction pad and method for fabricating the same |
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2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0959599A (en) * | 1995-08-25 | 1997-03-04 | Aisin Chem Co Ltd | Wet frictional material |
| CN101649035A (en) * | 2009-09-21 | 2010-02-17 | 江西科技师范学院 | Water-soluble toughened phenolic resin and preparation method thereof |
| CN107057275A (en) * | 2017-04-21 | 2017-08-18 | 来安县隆华摩擦材料有限公司 | A kind of preparation method of car clutch face sheet nano barium titanate aluminium/composite modified water soluble phenol resin of phosphorus boron molybdenum silicon |
| EP3597956A1 (en) * | 2018-07-18 | 2020-01-22 | LinkWin Technology Co., Ltd. | Friction pad and method for fabricating the same |
| CN109334179A (en) * | 2018-08-14 | 2019-02-15 | 烟台柳鑫新材料科技有限公司 | A kind of antistatic self-lubricating type PCB cover plate for drilling hole and preparation method thereof |
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