Comfortable high temperature resistant brake pads

Abstract

The present invention belongs to the technical field of brake pads, especially a kind of comfortable high temperature resistant brake pad, for the existing brake pad friction force is low, heat insulation and heat resistance performance is low, can not meet the problem of use demand, now propose the following scheme, it includes the following important components: friction layer raw material, heat dissipation layer raw material, silencer, elastic sheet and back plate, friction layer raw material includes: boron fiber 2-5 parts, carbon silicon fiber 2-4 parts, ceramic fiber 2-4 parts, mineral fiber 2-4 parts, phenolic resin 2-6 parts, coupling agent 1-4 parts, copper powder 2-6 parts and boron nitride powder 2-7 parts; insulation layer raw material includes: carbon silicon fiber 2-4 parts, quartz 1-4 parts, silicon nitride crystal 3-5 parts, artificial graphite 2-6 parts and polyamide 2-5 parts. The present invention is easy to operate, can improve the friction force and heat insulation and heat resistance of the brake pad, can meet the use demand.

Description

Technical Field

[0001] The invention relates to the technical field of brake pads, and in particular to a comfortable high-temperature resistant brake pad. Background Art

[0002] Brake pads are the most critical safety parts in the car's brake system. The working principle of brakes is mainly based on friction. The friction between the brake pads and the brake disc (drum) and the tires and the ground is used to convert the kinetic energy of the vehicle into heat after friction to stop the car. Therefore, the quality of the braking effect is determined by the brake pads. Therefore, good brake pads are the protectors of people and cars.

[0003] The friction of existing brake pads shows a significant downward trend in high-temperature areas, and their heat insulation and heat resistance properties are reduced, which can no longer meet the requirements of safe use. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of existing brake pads, such as low friction, low heat insulation and heat resistance, and failure to meet usage requirements, and to propose a comfortable high-temperature resistant brake pad.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a comfortable high temperature resistant brake pad, comprising a friction layer raw material, a heat insulation layer raw material and a back plate, characterized in that the friction layer raw material comprises: 3-4 parts of modified short fibers recycled from non-woven products, 2.2-4 parts of boron fibers, 2-4 parts of carbon silicon fibers, 2-4 parts of ceramic fibers, 2-4 parts of mineral fibers, 4-6 parts of phenolic resin, 1-3 parts of coupling agent, 2-3.5 parts of copper powder and 2-3.5 parts of boron nitride powder; the heat insulation layer raw material comprises: 2-4 parts of carbon silicon fibers, 1-2 parts of quartz, 3-5 parts of silicon nitride crystals, 2-3 parts of phenolic resin, 2-4 parts of artificial graphite and 2-4 parts of polyamide.

[0006] Preferably, the raw materials of the friction layer include: 3.5 parts of modified short fibers from recycled non-woven products, 2.8 parts of boron fibers, 2.6 parts of carbon silicon fibers, 3.2 parts of ceramic fibers, 2.8 parts of mineral fibers, 5 parts of phenolic resin, 2 parts of coupling agent, 2.5 parts of copper powder and 2.6 parts of boron nitride powder; the raw materials of the thermal insulation layer include: 3 parts of carbon silicon fibers, 1.5 parts of quartz, 3.2 parts of silicon nitride crystals, 2 parts of phenolic resin, 2.5 parts of artificial graphite and 2.2 parts of polyamide.

[0007] Preferably, the comfortable high temperature resistant brake pad is characterized by comprising the following preparation method:

[0008] S1: firstly, the friction layer raw materials are mixed and pressed to obtain a friction layer blank;

[0009] S2: Processing and pressing the raw materials of the heat insulation layer to obtain a heat insulation layer blank;

[0010] S3: Surface treatment of friction layer and heat insulation layer;

[0011] S4: stacking the friction layer, the heat insulation layer and the back plate in sequence, hot-pressing and vulcanizing the friction layer raw materials by hot-pressing to form brake pads; spraying, drying and packaging the brake pads to obtain the product.

[0012] In line with the purpose of being an environmentally friendly manufacturer, our company recycles and modifies the waste of non-woven products for use as friction materials. Our method for preparing modified short fibers from recycled non-woven products is: A. Rinse and dry the recycled non-woven products; B. Send the dried recycled non-woven products into a crusher and cut them into 30-50 mesh pieces; C. Send 20-30 parts of ultra-short glass fibers with a length of 0.15-0.5 mm, 0.5-1 parts of maleic anhydride grafted polypropylene, 0.5-1 parts of polymethylphenylsiloxane, and 0.2-0.5 parts of antioxidant BHT into a high-speed disperser for mixing. After mixing, immediately send them into a screw extruder for melting. The extruded melt is passed through a spinning box for spinning, quenched, and made into modified long fibers with a diameter of 0.5-1.0 mm; D. Cut the modified long fibers into short fibers to obtain modified short fibers from recycled non-woven products.

[0013] Compared with the prior art, the advantages of the present invention are that the present invention is easy to operate, can improve the friction force and heat insulation and heat resistance of the brake pad, and can meet the use requirements in harsh environments.

[0014] (1) The main friction material of the present invention is made of recycled non-woven fabrics through reprocessing, which reduces plastic and medical waste while reducing the production cost of the product and improving product performance.

[0015] (2) The boron fiber, carbon silicon fiber, ceramic fiber, mineral fiber, phenolic resin, coupling agent, copper powder and boron nitride powder of the present invention all have friction function, and the friction strength can be increased by mixing multiple of them.

[0016] (3) Carbon silicon fiber, quartz, silicon nitride crystal, artificial graphite and polyamide are all resistant to high temperatures and can provide high temperature insulation. The silencer and elastic sheet can reduce friction and provide a sound-absorbing effect. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Embodiment 1:

[0019] The comfortable high temperature resistant brake pads include friction layer raw materials, thermal insulation layer raw materials and backing plates, wherein the friction layer raw materials include: 3 parts of modified short fibers from recycled non-woven fabrics, 4 parts of boron fibers, 2 parts of carbon silicon fibers, 4 parts of ceramic fibers, 4 parts of mineral fibers, 6 parts of phenolic resins, 1.5 parts of coupling agents, 2 parts of copper powders and 3.5 parts of boron nitride powders; the thermal insulation layer raw materials include: 4 parts of carbon silicon fibers, 1 part of quartz, 5 parts of silicon nitride crystals, 3 parts of phenolic resins, 2 parts of artificial graphite and 2 parts of polyamide.

[0020] In this embodiment, the preparation method of the modified short fibers of non-woven product recyclate is as follows: A. rinse the non-woven product recyclate and dry it; B. send the dried non-woven product recyclate into a pulverizer and cut it into 30, 40 or 50 mesh pieces; C. send 20, 25 or 30 parts of ultra-short glass fibers with a length of 0.15-0.5 (shorter is better) mm, 0.5-1 part of maleic anhydride grafted polypropylene, 0.5 or 0.7 part of polymethylphenylsiloxane, and 0.2-0.5 part of antioxidant BHT into a high-speed disperser for mixing, and immediately send it into a screw extruder for melting after mixing, and the extruded molten material is passed through a spinning box for spinning, quenching, and made into modified long fibers with a diameter of 0.5-1.0 mm; D. cut the modified long fibers into short fibers to obtain modified short fibers of non-woven product recyclate. The length of the ultra-short glass fiber is 0.15-0.5 mm, and the length of the modified short fiber of the non-woven product recycled material is 6-10 mm.

[0021] In this embodiment, the following preparation method is included:

[0022] S1: firstly, the friction layer raw materials are mixed and pressed to obtain a friction layer blank;

[0023] S2: Processing and pressing the raw materials of the heat insulation layer to obtain a heat insulation layer blank;

[0024] S3: Surface treatment of friction layer and heat insulation layer;

[0025] S4: stacking the friction layer, the heat insulation layer and the back plate in sequence, and hot-pressing and vulcanizing the friction layer raw materials to form brake pads by hot-pressing molding; spraying, drying and packaging the brake pads to obtain the product.

[0026] In this embodiment, in S1, the friction layer raw materials are mixed and heated, the mixing temperature is 50-70° C., the mixing time is 30-50 min, and the friction layer raw materials are hot pressed into blanks by cold pressing.

[0027] In this embodiment, the insulation layer raw materials are mixed and heated in S2, and the insulation layer raw materials are hot pressed into shape by hot pressing. The mixing temperature is 60-70°C, the mixing time is 30-50 minutes, and the friction layer raw materials are hot pressed into blanks by cold pressing.

[0028] In this embodiment, the blank is placed in a flat vulcanizer at a high temperature of 350°C and a pressure of 25MPa for 30 minutes. After removing the burrs, it is sprayed, dried and packaged. An electrostatic spraying process is adopted, the speed of the spraying equipment is 500-1000rpm, the temperature is 150-200°C, and it is dried in a dryer.

[0029] Embodiment 2:

[0030] Comfortable high temperature resistant brake pads include friction layer raw materials, thermal insulation layer raw materials and back plates, wherein the friction layer raw materials include: 3.5 parts of modified short fibers from recycled non-woven products, 2.8 parts of boron fiber, 2.6 parts of carbon silicon fiber, 3.2 parts of ceramic fiber, 2.8 parts of mineral fiber, 5 parts of phenolic resin, 2 parts of coupling agent, 2.5 parts of copper powder and 2.6 parts of boron nitride powder; the thermal insulation layer raw materials include: 3 parts of carbon silicon fiber, 1.5 parts of quartz, 3.2 parts of silicon nitride crystal, 2 parts of phenolic resin, 2.5 parts of artificial graphite and 2.2 parts of polyamide.

[0031] In this embodiment, the preparation method of the modified short fibers of non-woven product recyclate is as follows: A. rinse the non-woven product recyclate and dry it; B. send the dried non-woven product recyclate into a pulverizer and cut it into 30, 40 or 50 mesh pieces; C. send 20, 25 or 30 parts of ultra-short glass fibers with a length of 0.15-0.5 (shorter is better) mm, 0.5-1 part of maleic anhydride grafted polypropylene, 0.5 or 0.7 part of polymethylphenylsiloxane, and 0.2-0.5 part of antioxidant BHT into a high-speed disperser for mixing, and immediately send it into a screw extruder for melting after mixing, and the extruded molten material is passed through a spinning box for spinning, quenching, and made into modified long fibers with a diameter of 0.5-1.0 mm; D. cut the modified long fibers into short fibers to obtain modified short fibers of non-woven product recyclate. The length of the ultra-short glass fiber is 0.15-0.5 mm, and the length of the modified short fiber of the non-woven product recycled material is 6-10 mm.

[0032] In this embodiment, the following preparation method is included:

[0033] S1: firstly, the friction layer raw materials are mixed and pressed to obtain a friction layer blank;

[0034] S2: Processing and pressing the raw materials of the heat insulation layer to obtain a heat insulation layer blank;

[0035] S3: Surface treatment of friction layer and heat insulation layer;

[0036] S4: stacking the friction layer, the heat insulation layer and the back plate in sequence, and hot-pressing and vulcanizing the friction layer raw materials to form brake pads by hot-pressing molding; spraying, drying and packaging the brake pads to obtain the product.

[0037] In this embodiment, in S1, the friction layer raw materials are mixed and heated, the mixing temperature is 50-70° C., the mixing time is 30-50 min, and the friction layer raw materials are hot pressed into blanks by cold pressing.

[0038] In this embodiment, the insulation layer raw materials are mixed and heated in S2, and the insulation layer raw materials are hot pressed into shape by hot pressing. The mixing temperature is 60-70°C, the mixing time is 30-50 minutes, and the friction layer raw materials are hot pressed into blanks by cold pressing.

[0039] In this embodiment, the blank is placed in a flat vulcanizer at a high temperature of 350°C and a pressure of 25MPa for 30 minutes. After removing the burrs, it is sprayed, dried and packaged. An electrostatic spraying process is adopted, the speed of the spraying equipment is 500-1000rpm, the temperature is 150-200°C, and it is dried in a dryer.

[0040] Embodiment 3:

[0041] Comfortable high temperature resistant brake pads include friction layer raw materials, thermal insulation layer raw materials and back plates, wherein the friction layer raw materials include: 4 parts of modified short fibers from recycled non-woven products, 2.2 parts of boron fiber, 2 parts of carbon silicon fiber, 2 parts of ceramic fiber, 2 parts of mineral fiber, 4 parts of phenolic resin, 1 part of coupling agent, 2 parts of copper powder and 3.5 parts of boron nitride powder; the thermal insulation layer raw materials include: 2 parts of carbon silicon fiber, 1 part of quartz, 3 parts of silicon nitride crystal, 3 parts of phenolic resin, 4 parts of artificial graphite and 2 parts of polyamide.

[0042] In this embodiment, the preparation method of the modified short fibers of non-woven product recyclate is as follows: A. rinse the non-woven product recyclate and dry it; B. send the dried non-woven product recyclate into a pulverizer and cut it into 30, 40 or 50 mesh pieces; C. send 20, 25 or 30 parts of ultra-short glass fibers with a length of 0.15-0.5 (shorter is better) mm, 0.5-1 part of maleic anhydride grafted polypropylene, 0.5 or 0.7 part of polymethylphenylsiloxane, and 0.2-0.5 part of antioxidant BHT into a high-speed disperser for mixing, and immediately send it into a screw extruder for melting after mixing, and the extruded molten material is passed through a spinning box for spinning, quenching, and made into modified long fibers with a diameter of 0.5-1.0 mm; D. cut the modified long fibers into short fibers to obtain modified short fibers of non-woven product recyclate. The length of the ultra-short glass fiber is 0.15-0.5 mm, and the length of the modified short fiber of the non-woven product recycled material is 6-10 mm.

[0043] In this embodiment, the following preparation method is included:

[0044] S1: firstly, the friction layer raw materials are mixed and pressed to obtain a friction layer blank;

[0045] S2: Processing and pressing the raw materials of the heat insulation layer to obtain a heat insulation layer blank;

[0046] S3: Surface treatment of friction layer and heat insulation layer;

[0047] S4: stacking the friction layer, the heat insulation layer and the back plate in sequence, and hot-pressing and vulcanizing the friction layer raw materials to form brake pads by hot-pressing molding; spraying, drying and packaging the brake pads to obtain the product.

[0048] In this embodiment, in S1, the friction layer raw materials are mixed and heated, the mixing temperature is 50-70° C., the mixing time is 30-50 min, and the friction layer raw materials are hot pressed into blanks by cold pressing.

[0049] In this embodiment, the insulation layer raw materials are mixed and heated in S2, and the insulation layer raw materials are hot pressed into shape by hot pressing. The mixing temperature is 60-70°C, the mixing time is 30-50 minutes, and the friction layer raw materials are hot pressed into blanks by cold pressing.

[0050] In this embodiment, the blank is placed in a flat vulcanizer at a high temperature of 350°C and a pressure of 25MPa for 30 minutes. After removing the burrs, it is sprayed, dried and packaged. An electrostatic spraying process is adopted, the speed of the spraying equipment is 500-1000rpm, the temperature is 150-200°C, and it is dried in a dryer.

[0051] Comparative Example: 10 parts of acrylic pulp, 13.5 parts of mullite ceramic fiber, 3.5 parts of brucite fiber, 5 parts of nano tin powder, 11 parts of zinc sulfide, 5.25 parts of brown corundum, 6.5 parts of antimony sulfide, 8.5 parts of cellulose fiber, 4.6 parts of iron black, 6 parts of calcium carbonate whisker, 9.5 parts of calcium sulfate whisker, 13.3 parts of potassium titanate, 6.5 parts of flake graphite, 7 parts of calcined petroleum coke, 4 parts of flake aluminum powder, 4 parts of nitrile rubber powder, 9 parts of phenolic resin, 1.1 parts of nano manganese hydroxide and 9 parts of molybdenum disulfide were poured into a high-speed disperser by weight, stirred into a uniformly dispersed powder, taken out of the friction material composition, put into a forming mold for compression molding, and then compounded with a steel back, put into a flat vulcanizer and kept at a high temperature of 350° C. and a pressure of 25 MPa for 30 minutes, and then the brake pad was taken out and the burrs were removed to obtain a finished product.

[0052] In order to verify the effect of the present invention, the brake pads prepared in Examples 1 to 3 and the comparative example were subjected to inertia bench tests according to the Chinese national standard GB5763-1998. The results are shown in the following table:

[0053]

[0054] It can be seen from the above table that the high friction performance environmentally friendly brake pad proposed by the present invention has obvious improvements in friction performance and thermal stability in high temperature areas, and implementation 2 is the best implementation example.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A comfortable high temperature resistant brake pad, comprising a friction layer material, a heat insulation layer material and a back plate, characterized in that: The raw materials of the friction layer include: 3-4 parts of modified short fibers from recycled non-woven products, 2.2-4 parts of boron fibers, 2-4 parts of carbon silicon fibers, 2-4 parts of ceramic fibers, 2-4 parts of mineral fibers, 4-6 parts of phenolic resins, 1-3 parts of coupling agents, 2-3.5 parts of copper powders and 2-3.5 parts of boron nitride powders; the raw materials of the heat insulation layer include: 2-4 parts of carbon silicon fibers, 1-2 parts of quartz, 3-5 parts of silicon nitride crystals, 2-3 parts of phenolic resins, 2-4 parts of artificial graphite and 2-4 parts of polyamide; the preparation method of the modified short fibers from recycled non-woven products is: A. rinsing the recycled non-woven products and drying them; B. The dried non-woven product recyclate is sent to a pulverizer and cut into 30-50 mesh pieces. C. 20-30 parts of ultra-short glass fibers with a length of 0.15-0.5 mm, 0.5-1 parts of maleic anhydride grafted polypropylene, 0.5-1 parts of polymethylphenylsiloxane, and 0.2-0.5 parts of antioxidant BHT are sent to a high-speed disperser for mixing, and immediately sent to a screw extruder for melting after mixing. The extruded melt is passed through a spinning box for spinning, quenched, and made into modified long fibers with a diameter of 0.5-1.0 mm; D. The modified long fibers are cut into short fibers to obtain modified short fibers of non-woven product recyclate. The preparation steps include: S1: firstly, the friction layer raw materials are mixed and pressed to obtain a friction layer blank; S2: Processing and pressing the raw materials of the heat insulation layer to obtain a heat insulation layer blank; S3: Surface treatment of friction layer and heat insulation layer; S4: stacking the friction layer, the heat insulation layer and the back plate in sequence, and hot-pressing and vulcanizing the friction layer raw material by hot-pressing to form a brake pad.

2. The comfortable high temperature resistant brake pad according to claim 1, characterized in that: The raw materials for the friction layer include: 3.5 parts of modified short fibers from recycled non-woven products, 2.8 parts of boron fibers, 2.6 parts of carbon silicon fibers, 3.2 parts of ceramic fibers, 2.8 parts of mineral fibers, 5 parts of phenolic resin, 2 parts of coupling agent, 2.5 parts of copper powder and 2.6 parts of boron nitride powder; the raw materials for the thermal insulation layer include: 3 parts of carbon silicon fibers, 1.5 parts of quartz, 3.2 parts of silicon nitride crystals, 2 parts of phenolic resin, 2.5 parts of artificial graphite and 2.2 parts of polyamide.

3. The comfortable high temperature resistant brake pad according to claim 1, characterized in that: The product is obtained by spraying, drying and packaging the brake pad.

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