Aramid fiber fabric reinforced wet friction material and preparation method thereof

A technology of wet friction material and aramid fiber, which is applied in the field of friction materials, can solve problems such as unstable friction coefficient, low friction coefficient, and high cost, and achieve good friction coefficient stability, vibration and noise improvement, and high shear strength Effect

Pending Publication Date: 2022-06-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of low resin impregnation efficiency, low friction coefficient, poor interface bonding of composite materials and unstable friction coefficient caused by the original fabric-reinforced wet friction material, and poor bonding effect with the steel ring (easy to fall off after long-term work) , high cost and other issues

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Aramid fiber fabric reinforced wet friction material and preparation method thereof
  • Aramid fiber fabric reinforced wet friction material and preparation method thereof
  • Aramid fiber fabric reinforced wet friction material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0043] The preparation method of the aramid fiber fabric reinforced wet friction material specifically includes the following steps:

[0044] Step 1: Add 100-200g of modified phenolic resin into 550ml of absolute ethanol, then stir for 4 hours, and let stand for 24 hours after stirring to obtain solution A;

[0045] Step 2: Cut the aramid fiber fabric into a rectangular shape of 5cm×10cm and lock the edges with a thread. Put the locked aramid fiber fabric in a petri dish containing acetone for 24 hours, take it out, and dry it to get the sample A;

[0046] Step 3: Sample A is alternately washed several times with deionized water and absolute ethanol, and then dried at about 75°C for at least 10 hours to obtain sample B;

[0047] Step 4: Immerse sample B in solution A for a period of time, take out and air dry to obtain sample C;

[0048] Step 5: The sample C is placed on a vulcanizing machine to be hot-pressed to obtain an aramid fiber fabric reinforced wet friction material...

Embodiment 1

[0050] Step 1: Weigh the weight of each component of the wet friction material: 400 g of aramid fiber fabric, 100 g of cashew nut shell oil-modified phenolic resin, 300 g of anhydrous ethanol, and 250 g of acetone.

[0051] Step 2: Add 100g of modified phenolic resin into 550ml of absolute ethanol, then stir for 4 hours, and leave to stand for 24 hours after stirring to obtain solution A;

[0052] Step 3: Cut the aramid fiber fabric into a rectangular shape of 5cm×10cm and lock the edges with threads. Put the locked aramid fiber fabric in a petri dish filled with acetone for 24 hours, then take it out and dry it to get the sample A;

[0053] Step 4: Sample A is washed several times alternately with deionized water and absolute ethanol, and then dried at about 75°C for at least 10 hours to obtain sample B;

[0054] Step 5: Put sample B in solution A and place it together with the container in the vacuum box, set the pressure value within a certain range, take out and dry after...

Embodiment 2

[0058] Step 1: Weigh the weight of each component of the wet friction material: 400 g of aramid fiber fabric, 100 g of cashew nut shell oil-modified phenolic resin, 300 g of anhydrous ethanol, and 250 g of acetone.

[0059] Step 2: Add 200g of modified phenolic resin into 550ml of absolute ethanol, then stir for 4 hours, and leave to stand for 24 hours after stirring to obtain solution A;

[0060] Step 3: Cut the aramid fiber fabric into a rectangular shape of 5cm×10cm and lock the edges with threads. Put the locked aramid fiber fabric in a petri dish filled with acetone for 24 hours, then take it out and dry it to get the sample A;

[0061] Step 4: Sample A is washed several times alternately with deionized water and absolute ethanol, and then dried at about 75°C for at least 10 hours to obtain sample B;

[0062] Step 5: Immerse sample B in solution A for a period of time, take out and air dry to obtain sample C;

[0063] Step 6: The sample C is placed on a vulcanizing agen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to an aramid fiber fabric reinforced wet friction material and a preparation method thereof, the aramid fiber fabric and modified phenolic resin are used as raw materials, the pretreated aramid fiber fabric is alternately cleaned with deionized water and absolute ethyl alcohol and dried, then the aramid fiber fabric is immersed in a phenolic resin solution dissolved with absolute ethyl alcohol for a period of time, and the aramid fiber fabric reinforced wet friction material is obtained. Taking out, naturally airing, and carrying out hot-pressing curing by using a press vulcanizer to obtain the final aramid fiber fabric reinforced composite material. According to the invention, the problems of the existing carbon fiber fabric reinforced wet-type friction material in the preparation process and the application process are solved, so that the aramid fiber fabric reinforced wet-type friction material with more excellent comprehensive performance is obtained. The prepared friction material is tested by an HSR-2M type high-speed reciprocating friction-wear testing machine, the friction-wear performance (the friction coefficient is increased by about 10%) is excellent, the dynamic friction coefficient under the wet condition is high and stable, the cost is low, and the durability and the reliability are extremely good.

Description

technical field [0001] The invention belongs to the field of friction materials, and relates to an aramid fiber fabric reinforced wet friction material and a preparation method. Background technique [0002] Wet friction materials refer to components that work in lubricating media (mainly lubricating oil) and rely on friction to achieve braking and transmission functions. They are mainly used in wet transmission systems such as automatic transmissions, differentials, torque managers and synchronizers. middle. [0003] With the development of vehicles towards high speed and heavy load, higher requirements are put forward for the safety and stability of the wet transmission system. As a high-performance wet friction material, carbon fiber fabric reinforced resin-based friction material is a type of friction material that uses fabric (carbon fiber) as the reinforcement and resin as the bonding matrix. Among them, carbon fiber fabrics are made of filament carbon fibers through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/10C08L61/14C08J5/04
CPCC08J5/046C08J2461/14C08J2377/10
Inventor 费杰法周恩至李贺军付前刚齐乐华傅业伟李畅刘义彭立印
Owner NORTHWESTERN POLYTECHNICAL UNIV
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