Polyacrylate rubber spindle lip type sealing ring and manufacture method thereof

Abstract

The invention belongs to the technical field of rubber products and relates to a polyacrylate rubber spindle lip type sealing ring and a manufacture method thereof. The polyacrylate rubber spindle lip type sealing ring comprises the following components in parts by weight: 100 parts of polyacrylate rubber, 50-60 parts of carbon black, 2-3 parts of an anti-aging agent, 2-2.5 parts of operation auxiliaries, 30-35 parts of an anti-wearing agent, 0.86 part of a vulcanizing agent and 2.2-2.6 parts of an accelerant. According to the polyacrylate rubber spindle lip type sealing ring and the manufacture method thereof provided by the invention, the manufactured ACM glue framework oil seal has heat-resisting, wear-resisting, oil-resisting and low temperature-resisting properties, and has small deformation and excellent following character; the problems of poor hand feel and elasticity, poor restoring property, difficulty in assembling at low temperature in winter and initial oil leakage of traditional ACM glue oil seal can be solved; since the technological equipment is advanced, the detection method is complete and fine, and the quality control is strict, the yield of finished products can reach up to 98% or above; thus, the oil seal is recognized by users.

Description

technical field [0001] The invention belongs to the technical field of rubber products, and relates to a polyacrylate rubber rotary shaft lip seal ring and a preparation method thereof. Background technique [0002] The rotary shaft lip seal (skeleton oil seal) is used in the sealing of motor vehicle engines, gearboxes, axles, hydraulic pumps and other rotary shafts. It is a sealing product with a wide range of applications, many varieties, and a large amount of consumption. The type of rubber used is nitrile rubber, the use temperature is below 100°C, the heat-resistant nitrile rubber is below 125°C, the use temperature of acrylic rubber (hereinafter referred to as ACM) is below 150°C, and the use temperature of fluorine rubber is below 200°C. Since the end of the 1980s, active chlorine-type ACM glue has been used to make skeleton oil seals, such as Japanese AR801, AR840, AR860, AR74, AR72, and domestic AR100 and AR200. Low temperature resistance, especially when the tempe...

AI Technical Summary

Problems solved by technology

Since the end of the 1980s, active chlorine-type ACM glue has been used to make skeleton oil seals, such as Japanese AR801, AR840, AR860, AR74, AR72, and domestic AR100 and AR200. Low temperature resistance, especially when the temperature is lower than 10°C, it almost loses its elasticity, resulting in assembly difficulties during low temperature assembly, and initial leakage is easy to occur. Therefore, since the end of the last century, ACM glue has been used to make oil seals, especially large-scale oil seals. In recent years, a variety of carboxylic acid-type ACM glues have appeared on the market, such as AR 403 and AR413 from Nippon Denka Corporation, AR12, AR14, and AR22 from Japan Zeon Corporation, and domestic PA515E PA500. Although the above rubber types can be used to make oil seals, However, the physical and chemical properties are low, the process performance is poor, especially the deformability and handle elasticity are very different from heat-resistant nitrile rubber and fluorine rubber oil seals, and the market does not recognize it.