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Modified aramid fiber pulp and preparation method thereof, and brake lining manufactured from modified aramid fiber pulp

A technology for modifying aramid fibers and brake pads, which is applied in mechanical equipment, friction linings, textiles and papermaking, etc., and can solve problems such as easy fracture of aramid pulp, short average length of pulp, and small degree of fibrillation. To achieve the effect of short pulping process, long length and high strength

Active Publication Date: 2016-11-09
SHENZHEN SELEN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the existing aramid pulp is easy to break during the preparation process, the average length of the prepared pulp is relatively short, and the degree of fibrillation is small, the present invention provides a modified aramid pulp and a preparation method thereof. The average length of the aramid pulp is long, the specific surface area is large, and the degree of fibrillation is high; the aramid pulp is used to make brake pads, which greatly improves the toughness, strength and thermal stability of the brake pads. And prolong the service life of brake pads

Method used

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  • Modified aramid fiber pulp and preparation method thereof, and brake lining manufactured from modified aramid fiber pulp
  • Modified aramid fiber pulp and preparation method thereof, and brake lining manufactured from modified aramid fiber pulp
  • Modified aramid fiber pulp and preparation method thereof, and brake lining manufactured from modified aramid fiber pulp

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preparation example Construction

[0026] The preparation of modified aramid pulp (A) comprises the following steps:

[0027] (1) Add 100 parts of aramid fibers into a steam explosion machine, heat to 200°C, maintain for 10 minutes under a pressure of 2 MPa, perform steam explosion treatment, collect the fibers after explosion and put them in an oven for drying to obtain steam-exploded aramid fibers fiber;

[0028] (2) Spray the above-mentioned aramid fibers after the blasting with imidazole ionic liquid;

[0029] (3) After stirring the above-mentioned aramid fibers treated with imidazole ionic liquids, put them into the hopper of the fluidized bed jet mill, and add them into the fluidized bed jet mill at a feeding rate of 30kg / h for dry process Slurry, wherein the crushing pressure of the jet mill is 0.8MPa, and the air volume of the induced draft fan is 8m 3 / min, the modified aramid pulp containing imidazole ionic liquid was prepared.

[0030] Aramid fibers of different lengths and ionic liquids of differ...

Embodiment 1

[0037] 20 parts of phenolic resin, 5 parts of basalt fiber, 4 parts of potassium titanate fiber, 6 parts of carbon fiber, 4 parts of rare earth, 7 parts of spray carbon black, 3 parts of antimony trisulfide, 5 parts of nitrile rubber, 4 parts of boric acid, diabase 12 parts of ore, 8 parts of sepiolite, 7 parts of magnesium oxide, and 15 parts of modified aramid pulp A-2.

Embodiment 2

[0045] 25 parts of phenolic resin, 3 parts of basalt fiber, 6 parts of potassium titanate fiber, 7 parts of carbon fiber, 3 parts of rare earth, 6 parts of spray carbon black, 3 parts of antimony trisulfide, 6 parts of nitrile rubber, 2 parts of boric acid, diabase 16 parts of ore, 10 parts of sepiolite, 8 parts of magnesium oxide, and 5 parts of modified aramid pulp A-1.

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Abstract

The invention provides a modified aramid fiber pulp with an average length of 5-8 mm, wherein the modified aramid fiber pulp is a modified aramid fiber pulp containing an imidazole ionic liquid. The invention further provides a preparation method of the modified aramid fiber pulp, wherein mainly steam blasting treatment, imidazole ionic liquid spraying treatment, fluidized bed airflow mill dry grinding and other processes are performed to prepare the modified aramid fiber pulp, the method has characteristics of short process, low energy consumption, no solvent and environment protection, and the prepared modified aramid fiber pulp has characteristics of high fibrillation degree, rich hairiness and large specific surface area. According to the present invention, with the application of the modified aramid fiber pulp as the reinforcing material to produce the brake lining and other friction materials, the strength, the toughness and the heat resistance of the brake lining are improved, the preparation formula does not contain asbestos, and the green environment protection advantage is provided.

Description

technical field [0001] The invention relates to the field of an organic fiber and its preparation, in particular to an aramid pulp, a preparation method thereof, and a brake pad made of the same. Background technique [0002] Brake pads are an important part related to the safe driving of vehicles. With the further development of the automobile industry and transportation, people have very strict requirements on the performance of brake pads. Friction material is an important part of brake pads in the process of manufacture and use. It is required to have sufficient and stable friction coefficient, small difference in dynamic and static friction coefficient; good thermal conductivity, wear resistance, and certain high temperature mechanical strength. ; Appropriate hardness, not easy to scratch the counterpart; no noise, low cost, no pollution to the environment, etc. Traditional asbestos-type brake pads have gradually faded out of the market due to the carcinogenic effect o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/352D06M10/00C08L61/06C08L9/02C08L77/10C08K13/04C08K7/10C08K7/08C08K7/06C08K3/04C08K3/30C08K3/38C08K3/34C08K3/22F16D69/02
CPCC08L61/06C08L2205/03C08L2205/16D06M10/00D06M13/352F16D69/02F16D2200/006C08L9/02C08L77/10C08K13/04C08K7/10C08K7/08C08K7/06C08K3/04C08K2003/3009C08K3/38C08K3/34C08K2003/222
Inventor 梁文耀郭辉
Owner SHENZHEN SELEN SCI & TECH CO LTD
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