Formula of highly anti-fatigue automobile brake chamber rubber diaphragm material

一种汽车制动、橡胶隔膜的技术，应用在汽车制动气室橡胶隔膜领域，能够解决抗疲劳性能不高等问题，达到刚度强、良好耐化学性、磨损小的效果

Active Publication Date: 2008-11-12
GUIZHOU JINGZHONG RUBBER & PLASTIC IND CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to: solve the defect that the anti-fatigue performance of automobile brake air chamber rubber diaphragm is not high in the prior art, provide a kind of natural rubber, styrene-butadiene rubber and polybutylene terephthalate (PBT) The main material is the high anti-fatigue automobile brake air chamber rubber diaphragm formula. The rubber diaphragm formula also has high constant tensile stress, high tensile properties, high resistance to dynamic flexural deformation, and high wear resistance. When used in the temperature range of ℃, the material performance changes little

Method used

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Embodiment Construction

[0025] Raw materials: according to the proportioning of the following embodiments, the prescription is carried out: (unit: kilogram)

[0026]

[0027]

[0028] Preparation method: take the blending system of natural rubber, styrene-butadiene rubber and PBT as the main body, add auxiliary materials, and use a high-temperature internal mixer for two-stage mixing. The details are as follows:

[0029] 1. Preplasticization of PBT

[0030] Weigh the PBT and dispersant according to the formula in the above table, stir them evenly, put them in an oven, and plasticize at 160°C for 2 hours to fully disperse the PBT and achieve the purpose of pre-plasticization.

[0031] 2. Plasticizing of PBT

[0032] Raise the temperature of the rollers of the double-roller mill to 150-160°C, reduce the roller distance, add pre-plasticized PBT powder, and then start plasticating until the PBT is a uniform transparent film, then make five triangular bags for the next sheet, Go to the next step o...

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PUM

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Abstract

The invention provides a rubber material formulation for a high fatigue resistant rubber diaphragm of an automobile brake chamber, which is mainly prepared by natural rubber (NR), styrene butadiene rubber (SBR), polybutylene terephthalate (PBT), vulcanizing agent, zinc oxides, stearic acid, anti-aging agent, dispersant, accelerant, carbon black, aromatic oil and white carbon black. The physical mechanical properties of the rubber diaphragm of the automobile brake chamber prepared by the rubber formulation all reach the novel standard drafted by the Society of Automotive Engineering (SAE) of America; the service life of a platform of the rubber diaphragm reaches over 2 million times; the platform has the advantages of high stress at definite elongation, strength and elongation property, compression fatigue resistivity, flexural deformation resistance and attrition resistance, and maintenance of small variation of the material characteristics within the wide use temperature between 55 and 100 DEG C when the material is used; and the service life of the platform is basically the same as that of an air brake assembly, and resource conservation is greatly promoted simultaneously, thereby realizing conversion of the platform from 'a wearing part' to 'a permanent part'.

Description

technical field [0001] The invention relates to the technical field of rubber diaphragms of automobile brake air chambers, in particular to the compound formula of rubber diaphragms of automobile brake air chambers with high fatigue resistance. Background technique [0002] The rubber diaphragm of the automobile brake chamber is a rubber fabric diaphragm used in the automobile brake chamber to transmit pressure. Its function is to convert the pressure of compressed air into mechanical thrust and play a role in vehicle braking. It is the executive component of the car braking system and an important security part on the car. The working pressure is generally 0.5-0.8MPa, and the working temperature is generally 40-70°C. [0003] As the core component of the brake air chamber, the rubber diaphragm of the automobile brake air chamber, its performance directly affects the service life of the brake air chamber. The service life of the domestic automobile brake chamber rubber dia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/06C08L67/02C08K13/02
Inventor 戴红景李辉李登华
Owner GUIZHOU JINGZHONG RUBBER & PLASTIC IND CO LTD
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