CN112679906A - Environment-friendly brake pad cushion material, brake pad based on environment-friendly brake pad cushion material and preparation method of environment-friendly brake pad cushion material - Google Patents
Environment-friendly brake pad cushion material, brake pad based on environment-friendly brake pad cushion material and preparation method of environment-friendly brake pad cushion material Download PDFInfo
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Abstract
The invention relates to the technical field of automobile friction braking materials, in particular to an environment-friendly brake pad cushion material, a brake pad based on the environment-friendly brake pad cushion material and a preparation method of the environment-friendly brake pad cushion material. The environment-friendly brake pad cushion material is composed of the following raw materials in percentage by mass: 15-20% of acrylic rubber modified phenolic resin, 1-4% of aramid fiber, 10-20% of composite mineral fiber, 20-30% of steel fiber, 1-3% of nano spherical alumina, 1-3% of chromium oxide green, 2-6% of elastic carbon material, 4-8% of nitrile rubber, 20-37% of calcium carbonate and 1-2% of multi-silane coupling agent. The environment-friendly brake pad cushion material disclosed by the invention is high in high-temperature shear strength and high in compression performance, so that the brake pad is excellent in noise performance, free of harmful components such as asbestos and heavy metals and good in environment-friendly performance.
Description
Technical Field
The invention relates to the technical field of automobile friction braking materials, in particular to an environment-friendly brake pad cushion material, a brake pad based on the environment-friendly brake pad cushion material and a preparation method of the environment-friendly brake pad cushion material.
Background
The brake pad is the most critical safety part in the brake system of the automobile and is also an important part for ensuring the safety of a driver. The brake block comprises a steel back and a friction material fixed on the steel back, and the friction material is connected with the steel back through a cushion layer. When braking, the friction material is subjected to a large friction force, so that the cushion structure between the friction material and the steel backing is also subjected to a large shearing force.
The existing brake pad product mainly improves the bonding strength of a friction material and a steel backing by adding a resin base cushion layer material between the friction material and the steel backing. With the increase of the vehicle service mass and the increase of the speed, the braking temperature can reach 400-600 ℃ under severe conditions, and the temperature can be transferred to the cushion layer through the friction material. For a cushion layer made of a resin-based material, due to factors such as easiness in oxidative decomposition of a resin binder at high temperature and the like, the shearing strength of a brake pad is reduced in a high-temperature braking process, and a pad falling accident occurs under severe conditions, so that the braking safety is influenced. Therefore, how to improve the high-temperature shearing strength of the brake pad becomes a new problem of improving the safety performance of the brake at present.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention is directed to an environment-friendly pad layer material for a brake pad, a brake pad based on the same, and a method for preparing the same, so as to improve the shear strength between a friction material and a steel backing at high temperature.
In order to achieve the aim or other objects, the invention provides an environment-friendly brake pad layer material which comprises the following raw materials in percentage by mass: 15-20% of acrylic rubber modified phenolic resin, 1-4% of aramid fiber, 10-20% of composite mineral fiber, 20-30% of steel fiber, 1-3% of nano spherical alumina, 1-3% of chromium oxide green, 2-6% of elastic carbon material, 4-8% of nitrile rubber, 20-37% of calcium carbonate and 1-2% of multi-silane coupling agent.
Preferably, the environmental-friendly brake pad cushion material comprises the following components in percentage by mass: 0.5 to 1.0 percent of vinyl triethoxysilane, 0.25 to 0.5 percent of vinyl trimethoxy silane and 0.25 to 0.5 percent of vinyl tri (beta-methoxy vinyl) silane.
Preferably, the formulation process of the silane coupling agent comprises: mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator to regulate the pH of the solution to 4-5.
Preferably, the formulation process of the silane coupling agent further comprises: after the pH value of the solution is adjusted to 4-5, stirring is carried out for 10-20min at normal temperature, and standing is carried out for 15-30min at normal temperature after stirring is finished, so that the silane coupling agent is promoted to be hydrolyzed.
Preferably, the acrylic rubber modified phenolic resin has a fluidity of 20-40mm at 125 ℃ and a curing time of 105-150s at 150 ℃. The flow distance and gel time were determined by reference to the methods of appendix A2 and A4 of GB/T24411-2009 standard.
Preferably, the fiber diameter of the composite mineral fiber is 2.0-5.0 μm, and the fiber length is 200-500 μm.
Preferably, the diameter of the aramid fiber is 5-15 μm, and the length of the aramid fiber is 0.70-1.20 mm; the granularity of the steel fiber is 40-70 meshes.
Preferably, the elastic carbon material has the rebound resilience of 100-150% and the particle size of 0.1-1.0 mm.
Preferably, the nano spherical alumina is 5-15 μm; the chromium oxide green is 1.0-5.0 μm; the calcium carbonate is 10-20 μm; the nitrile rubber is 100-150 meshes.
Preferably, the preparation method of the environment-friendly brake pad backing material comprises the following steps;
(1) preparing a silane coupling agent solution: mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator, the solution is stirred for 10-20min at normal temperature after the pH of the solution is regulated to 4-5, and the solution is kept stand for 15-30min at normal temperature after stirring is finished, so that the silane coupling agent is promoted to be hydrolyzed;
(2) weighing: weighing all raw materials except the silane coupling agent according to the components and the mass percentage of the environment-friendly brake pad cushion layer material;
(3) first step mixing: adding the raw materials weighed in the step (2) into a stirrer, wherein the stirring speed is 100-;
(4) and a second step of mixing materials: and (3) continuing stirring for 2-4min, adding the silane coupling agent solution prepared in the step (1) into a high-speed stirrer by using a hand-operated spraying device in the stirring process, and standing for 10-15min after stirring is finished to obtain the cushion material.
In an example of the present invention, there is further provided a use of the environment-friendly brake pad material according to any one of the above items in a brake pad: and (3) placing the friction material in a cavity of a hot-pressing mold, flattening, adding a cushion material, flattening, placing a steel backing, hot-pressing and molding, demolding, thermally treating and post-treating to obtain the brake pad.
In an example of the invention, the brake pad comprises a steel backing and a friction block, wherein the friction block and the steel backing are connected through any one of the environment-friendly brake pad cushion materials.
The invention adopts the compounding of the multielement reinforced fiber material and utilizes the interface modification effect of the compound silane coupling agent to improve the interface compatibility among the multielement reinforced fiber, the inorganic material and the phenolic resin and effectively improve the high-temperature shearing performance. Through the elastic carbon material and the nitrile rubber composite elastic material, the brake safety is improved, the compression performance of the brake pad is effectively improved, the brake noise is reduced, and the effect which cannot be realized by the traditional cushion material is achieved. Compared with the application of the traditional cushion layer, the method applies a large amount of low-cost materials such as steel fibers and the like, and has remarkable cost advantage. Therefore, the environment-friendly brake pad cushion material has high-temperature shear strength, high compression performance and excellent brake pad noise performance, does not contain harmful components such as asbestos, heavy metal and the like, and has good environment-friendly performance.
Detailed Description
The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The brake pad is the most critical safety part in the brake system of the automobile and is also an important part for ensuring the safety of a driver. The brake block comprises a steel back and a friction material fixed on the steel back, and the friction material is connected with the steel back through a cushion layer. When braking, the friction material is subjected to a large friction force, so that the cushion structure between the friction material and the steel backing is also subjected to a large shearing force. The existing brake pad product mainly improves the bonding strength of a friction material and a steel backing by adding a cushion material between the friction material and the steel backing. With the increase of the vehicle service mass and the increase of the speed, the braking temperature can reach 400-600 ℃ under severe conditions, and the temperature can be transferred to the cushion layer through the friction material. For a cushion layer made of a resin-based material, due to factors such as easiness in oxidative decomposition of a resin binder at high temperature and the like, the shearing strength of a brake pad is reduced in a high-temperature braking process, and a pad falling accident occurs under severe conditions, so that the braking safety is influenced. Therefore, how to improve the high-temperature shearing strength of the brake pad becomes a new problem of improving the safety performance of the brake at present. Although there is a high temperature resistant heat insulation brake pad, the heat transfer generated by braking is blocked by a thin cushion layer material, but the cushion layer material contains more than 70% of organic matters, and the organic matters are oxidized and decomposed under high temperature, so that there is a serious safety risk. In addition, the thickness of the cushion layer material of the brake pad is set to be 4mm, which is obviously different from 1.5-2.5mm (required by a host factory) commonly used in a disc brake pad, and the brake pad has inapplicability. In the prior art, the addition of graphene improves the mechanical strength of the cushion layer by improving the curing crosslinking of resin in the cushion layer material, and further improves the normal-temperature and high-temperature shear strength of the brake pad, but the cushion layer uses a large amount of expensive graphene (50-500 yuan/g) as a structural material to improve the shear strength, and the actual application prospect is not ideal.
In view of the above-mentioned shortcomings of the prior art, the present invention is directed to an environment-friendly pad layer material for brake pads, a brake pad based on the same and a manufacturing method thereof, so as to improve the shear strength of the pad layer between a friction material and a steel backing at high temperature. The environment-friendly brake pad cushion material is compounded by adopting a multi-component reinforced fiber material, and the interface compatibility among the multi-component reinforced fiber, an inorganic material and phenolic resin is improved by utilizing the interface modification effect of a compound silane coupling agent, so that the high-temperature shearing performance is effectively improved. Through the elastic carbon material and the nitrile rubber composite elastic material, the brake safety is improved, the compression performance of the brake pad is effectively improved, the brake noise is reduced, and the effect which cannot be realized by the traditional cushion material is achieved. Compared with the application of the traditional cushion layer, the method applies a large amount of low-cost materials such as steel fibers and the like, and has remarkable cost advantage. Therefore, the environment-friendly brake pad cushion material has high-temperature shear strength, high compression performance and excellent brake pad noise performance, does not contain harmful components such as asbestos, heavy metal and the like, and has good environment-friendly performance.
The environment-friendly brake pad cushion material comprises the following raw materials in percentage by mass: 15-20% of acrylic rubber modified phenolic resin, 1-4% of aramid fiber, 10-20% of composite mineral fiber, 20-30% of steel fiber, 1-3% of nano spherical alumina, 1-3% of chromium oxide green, 2-6% of elastic carbon material, 4-8% of nitrile rubber, 20-37% of calcium carbonate and 1-2% of silane coupling agent.
The environment-friendly brake pad cushion material comprises the following components in percentage by mass based on the total mass of the environment-friendly brake pad cushion material: 0.5 to 1.0 percent of vinyl triethoxysilane, 0.25 to 0.5 percent of vinyl trimethoxy silane and 0.25 to 0.5 percent of vinyl tri (beta-methoxy vinyl) silane.
The preparation process of the silane coupling agent comprises the following steps: mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator to regulate the pH of the solution to 4-5.
The preparation process of the silane coupling agent further comprises the following steps: after the pH value of the solution is adjusted to 4-5, stirring is carried out for 10-20min at normal temperature, and standing is carried out for 15-30min at normal temperature after stirring is finished, so that the silane coupling agent is promoted to be hydrolyzed.
In the above cushion material, the fluidity of the acrylic rubber modified phenolic resin at 125 ℃ is 20-40mm, and the curing time at 150 ℃ is 105-150 s. The flow distance and gel time were determined by reference to the methods of appendix A2 and A4 of GB/T24411-2009 standard.
In the above mentioned mat material, the fiber diameter of the composite mineral fiber is 2.0-5.0 μm, and the fiber length is 200-500 μm.
In the material of the cushion layer, the diameter of the aramid fiber is 5-15 μm, and the length of the aramid fiber is 0.70-1.20 mm; the granularity of the steel fiber is 40-70 meshes.
In the above-mentioned cushion material, the elastic carbon material has a rebound resilience of 100-150% and a particle size of 0.1-1.0 mm.
In the material of the cushion layer, the nanometer spherical alumina is 5-15 μm; the chromium oxide green is 1.0-5.0 μm; the calcium carbonate is 10-20 μm; the nitrile rubber is 100-150 meshes.
The invention also provides a preparation method of the environment-friendly brake pad cushion material, which comprises the following steps;
(1) preparing a silane coupling agent solution: mixing ethanol and water as solvents and a silane coupling agent as a solute; acetic acid is used as a pH regulator, the solution is stirred for 10-20min at normal temperature after the pH of the solution is regulated to 4-5, and the solution is kept stand for 15-30min at normal temperature after stirring is finished, so that the silane coupling agent is promoted to be hydrolyzed;
(2) weighing: weighing all raw materials except the silane coupling agent according to the components and the mass percentage of the environment-friendly brake pad cushion layer material;
(3) first step mixing: adding the raw materials weighed in the step (2) into a stirrer, wherein the stirring speed is 100-;
(4) and a second step of mixing materials: and (3) continuing stirring for 2-4min, adding the silane coupling agent solution prepared in the step (1) into a high-speed stirrer by using a hand-operated spraying device in the stirring process, and standing for 10-15min after stirring is finished to obtain the cushion material.
In an example of the present invention, there is further provided a use of the environment-friendly brake pad material according to any one of the above items in a brake pad: and (3) placing the friction material in a cavity of a hot-pressing mold, flattening, adding a cushion material, flattening, placing a steel backing, hot-pressing and molding, demolding, thermally treating and post-treating to obtain the brake pad.
In an example of the invention, the brake pad comprises a steel backing and a friction block, wherein the friction block and the steel backing are connected through any one of the environment-friendly brake pad cushion materials.
The raw materials have different proportions, and different embodiments can be formed, specifically as follows:
example one
The environment-friendly brake pad cushion material comprises the following raw material components in percentage by mass: 15% of acrylic rubber modified phenolic resin, 3% of aramid fiber, 10% of composite mineral fiber, 20% of steel fiber, 1% of nano spherical alumina, 3% of chromium oxide green, 2% of elastic carbon material, 8% of nitrile rubber, 37% of calcium carbonate, 0.5% of vinyl triethoxysilane, 0.25% of vinyl trimethoxysilane and 0.25% of vinyl tri (beta-methoxyvinyl) silane.
Wherein the fluidity of the acrylic rubber modified phenolic resin is 20mm/125 ℃, and the curing time is 150s/150 ℃; the fiber diameter of the composite mineral fiber is 2.0 μm, and the fiber length is 500 μm; the elastic carbon material has the rebound resilience of 100 percent and the grain diameter of 1.0 mm.
The preparation method of the environment-friendly brake pad cushion material comprises the following steps:
(1) preparing a silane coupling agent solution: mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator to regulate the pH of the solution to 4; stirring at normal temperature for 10min, and standing at normal temperature for 15min after stirring to promote hydrolysis of the silane coupling agent;
(2) weighing: weighing all raw materials except the silane coupling agent according to the components and the mass percentage of the environment-friendly brake pad cushion layer material;
(3) mixing materials in one step: according to the formula of the environment-friendly brake pad cushion material, acrylic rubber modified phenolic resin, aramid fiber, composite mineral fiber, steel fiber, nano spherical alumina, chromium oxide green, an elastic carbon material, nitrile rubber and calcium carbonate are introduced into a high-speed mixer at a ratio of 100r/min and mixed uniformly for 5 min;
(4) two-step material mixing: and (3) continuing stirring for 2min, adding the silane coupling agent solution prepared in the step (1) into a high-speed stirrer by using a hand-operated spraying device in the stirring process, and standing for 10min after stirring is finished to obtain the cushion material.
Example two
The environment-friendly brake pad cushion material comprises the following components in percentage by mass:
17% of acrylic rubber modified phenolic resin, 4% of aramid fiber, 13.5% of composite mineral fiber, 30% of steel fiber, 2% of nano spherical alumina, 2% of chromium oxide green, 4% of elastic carbon material, 4% of nitrile rubber, 22% of calcium carbonate, 1.0% of vinyl triethoxysilane, 0.25% of vinyl trimethoxysilane and 0.25% of vinyl tris (beta-methoxyvinyl) silane.
Wherein the fluidity of the acrylic rubber modified phenolic resin is 30mm/125 ℃, and the curing time is 130s/150 ℃; the fiber diameter of the composite mineral fiber is 3.5 μm, and the fiber length is 350 μm; the elastic carbon material has the rebound resilience of 130 percent and the grain diameter of 0.5 mm.
The preparation method of the environment-friendly brake pad cushion material comprises the following steps:
(1) mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator to regulate the pH of the solution to 4.5; stirring at normal temperature for 15min, and standing at normal temperature for 20min after stirring to promote hydrolysis of the silane coupling agent;
(2) weighing: weighing all raw materials except the silane coupling agent according to the components and the mass percentage of the environment-friendly brake pad cushion layer material;
(3) mixing materials in one step: acrylic rubber modified phenolic resin, aramid fiber, composite mineral fiber, steel fiber, nano spherical alumina, chromium oxide green, an elastic carbon material, nitrile rubber and calcium carbonate are introduced into a high-speed mixer at a ratio of 150r/min and mixed uniformly for 7 min;
(4) two-step material mixing: and (3) continuing stirring for 3min, adding the silane coupling agent solution prepared in the step (1) into a high-speed stirrer by using a hand-operated spraying device in the stirring process, and standing for 12min after stirring is finished to obtain the cushion material.
EXAMPLE III
The environment-friendly brake pad cushion material comprises the following components in percentage by mass:
20% of acrylic rubber modified phenolic resin, 1% of aramid fiber, 20% of composite mineral fiber, 23% of steel fiber, 3% of nano spherical alumina, 1% of chromium oxide green, 6% of elastic carbon material, 4% of nitrile rubber, 20% of calcium carbonate, 1.0% of vinyl triethoxysilane, 0.5% of vinyl trimethoxysilane and 0.5% of vinyl tri (beta-methoxyvinyl) silane.
Wherein the fluidity of the acrylic rubber modified phenolic resin is 40mm/125 ℃, and the curing time is 105s/150 ℃; the fiber diameter of the composite mineral fiber is 5 μm, and the fiber length is 200 μm; the elastic carbon material has the rebound resilience of 150 percent and the grain diameter of 0.1 mm.
The preparation method of the environment-friendly brake pad cushion material comprises the following steps:
(1) mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator to regulate the pH of the solution to 5; stirring at normal temperature for 20min, and standing at normal temperature for 30min after stirring to promote hydrolysis of the silane coupling agent;
(2) weighing: weighing all raw materials except the silane coupling agent according to the components and the mass percentage of the environment-friendly brake pad cushion layer material.
(3) Mixing materials in one step: introducing acrylic rubber modified phenolic resin, aramid fiber, composite mineral fiber, steel fiber, nano spherical alumina, chromium oxide green, an elastic carbon material, nitrile rubber and calcium carbonate into a high-speed mixer at a ratio of 200r/min for uniformly mixing for 8 min;
(4) two-step material mixing: and (3) continuing stirring for 4min, adding the silane coupling agent solution prepared in the step (1) into a high-speed stirrer by using a hand-operated spraying device in the stirring process, and standing for 15min after stirring is finished to obtain the cushion material.
Comparative example
The components and mass percentage formula of the cushion material in the comparative example are as follows:
15% of straight-chain phenolic resin, 1% of aramid fiber, 20% of composite mineral fiber, 20% of steel fiber, 4% of chromium oxide green, 2% of nitrile rubber and 38% of calcium carbonate.
Wherein the fluidity of the straight-chain phenolic resin is 35mm/125 ℃, and the curing time is 90s/150 ℃; the fiber diameter of the composite mineral fiber was 3.5 μm and the fiber length was 350. mu.m.
The preparation method of the comparative example cushion material specifically comprises the following steps:
(1) weighing: weighing all the raw materials according to the components and the mass percentage of the comparative example cushion material.
(2) Mixing materials in one step: and (2) introducing straight-chain phenolic resin, aramid fiber, composite mineral fiber, steel fiber, chromium oxide green, nitrile rubber and calcium carbonate into a high-speed stirrer at a ratio of 150r/min at one time according to the raw materials, and uniformly mixing for 10min to obtain the cushion material.
The process of using the environment-friendly brake pad cushion material in each embodiment for manufacturing the brake pad specifically comprises the following steps; and (3) placing the friction material in a cavity of a hot-pressing mold, flattening, adding a cushion material, flattening, placing a steel backing, hot-pressing and molding, demolding, thermally treating and post-treating to obtain the brake pad. The obtained brake pads were tested and the specific test results in each example were compared with those using conventional commercial pads as follows:
it should be noted that the unpublished conditions in the examples of the present invention are the same except for the numerical values explicitly given.
The raw materials used in the examples of the present invention are conventional materials well known to those skilled in the art and can be obtained from general commercial sources. The reference standards in the performance test of the brake pad are respectively as follows: the shear test standard is ISO 6312, the compression test standard is ISO 6310, and the brake noise standard is SAE J2521.
The test results show that the high-temperature shear strength and the braking safety are improved, the compression performance of the brake pad is effectively improved, the braking noise is reduced, and the effect which cannot be realized by the traditional cushion layer material is achieved.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The environment-friendly brake pad cushion material is characterized by comprising the following raw materials in percentage by mass: 15-20% of acrylic rubber modified phenolic resin, 1-4% of aramid fiber, 10-20% of composite mineral fiber, 20-30% of steel fiber, 1-3% of nano spherical alumina, 1-3% of chromium oxide green, 2-6% of elastic carbon material, 4-8% of nitrile rubber, 20-37% of calcium carbonate and 1-2% of multi-silane coupling agent.
2. The environment-friendly brake pad backing material according to claim 1, wherein the composition and mass percentage of the multi-element silane coupling agent based on the total mass of the environment-friendly brake pad backing material are as follows: 0.5 to 1.0 percent of vinyl triethoxysilane, 0.25 to 0.5 percent of vinyl trimethoxy silane and 0.25 to 0.5 percent of vinyl tri (beta-methoxy vinyl) silane.
3. The environment-friendly pad material for brake pads as defined in claim 1, wherein the silane coupling agent is formulated by a process comprising: mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator to regulate the pH of the solution to 4-5.
4. The environment-friendly brake pad material as set forth in claim 2, wherein the process of preparing the silane coupling agent further comprises: after the pH value of the solution is adjusted to 4-5, stirring is carried out for 10-20min at normal temperature, and standing is carried out for 15-30min at normal temperature after stirring is finished, so that the silane coupling agent is promoted to be hydrolyzed.
5. The cushion material for brake pad as claimed in claim 1, wherein the fluidity of the acrylic rubber modified phenolic resin is 20-40mm at 125 ℃, and the curing time is 105-150s at 150 ℃.
6. The environment-friendly brake pad backing material as defined in claim 1, wherein the composite mineral fiber has a fiber diameter of 2.0-5.0 μm and a fiber length of 200-500 μm.
7. The cushion material of the environment-friendly brake pad as claimed in claim 1, wherein the resilient carbon material has a resilience of 100-150% and a particle size of 0.1-1.0 mm.
8. A method for preparing the cushion material of the environment-friendly brake pad of any one of claims 1 to 7, comprising the steps of:
(1) preparing a silane coupling agent solution: mixing ethanol and water as solvents and a multi-element silane coupling agent as a solute; acetic acid is used as a pH regulator, the solution is stirred for 10-20min at normal temperature after the pH of the solution is regulated to 4-5, and the solution is kept stand for 15-30min at normal temperature after stirring is finished, so that the silane coupling agent is promoted to be hydrolyzed;
(2) weighing: weighing all raw materials except the silane coupling agent according to the components and the mass percentage of the environment-friendly brake pad cushion layer material;
(3) first step mixing: adding the raw materials weighed in the step (2) into a stirrer, wherein the stirring speed is 100-;
(4) and a second step of mixing materials: and (3) continuing stirring for 2-4min, adding the silane coupling agent solution prepared in the step (1) into a high-speed stirrer by using a hand-operated spraying device in the stirring process, and standing for 10-15min after stirring is finished to obtain the cushion material.
9. Use of the environment-friendly brake pad backing material according to any one of claims 1 to 7 in a brake pad.
10. A brake pad, comprising a steel backing and a friction block, wherein the friction block and the steel backing are connected through the environment-friendly brake pad cushion material of any one of claims 1 to 7.
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| CN202011482896.3A CN112679906B (en) | 2020-12-16 | 2020-12-16 | Environment-friendly brake pad cushion material, brake pad based on environment-friendly brake pad cushion material and preparation method of environment-friendly brake pad cushion material |
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| CN108278290A (en) * | 2018-03-26 | 2018-07-13 | 山东金麒麟股份有限公司 | A kind of bedding material and its preparation method and application |
| CN110081107A (en) * | 2019-03-27 | 2019-08-02 | 山东金麒麟股份有限公司 | A kind of friction material, using the brake(-holder) block and preparation method of friction material preparation |
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