Rubber packing ring and manufacturing technology thereof

Abstract

The invention provides a rubber sealing ring and a production method thereof. The rubber sealing ring is prepared from the following components of (by weight parts): ethylene propylene diene monomer (EPDM) 80-120, carbon black 55-75, paraffin oil 15-25, indirect process zinc oxide 4-6, stearic acid 0.2-1, anti-aging agent 2-4, sulfur S-80 0.1-0.35, vulcanizing agent dicumyl peroxide (DCP) 3-5, and lubricating agent 1-3. The production method comprises the steps of: synthesizing rubber with a Banbury mixer, forming the synthetic rubber with a mixing mill, first-stage vulcanizing in a mold of a vulcanizing device, second-stage the product from the first-stage vulcanization in an oven, trimming, testing, and storing. The inventive rubber sealing ring has improved tensile strength, extensibility, tear strength, self-lubrication effect, compression and deformation resistance, heat resistance and aging resistance, good medium resistance, and prolonged service life. The inventive production method is simple and reasonable.

Description

technical field [0001] The invention belongs to the technical field of making rubber sealing materials, and mainly relates to a rubber sealing ring for a joint of a water delivery pipeline, in particular to a rubber sealing ring and a manufacturing process thereof. Background technique [0002] In recent years, with the rapid development of the domestic economy, there are more and more high-rise commercial and civil buildings, and the fire-fighting water pipelines of these high-rise buildings are also essential key safety facilities. The joints of these water pipelines are used The rubber sealing ring is the most important key component of the system. The commonly used sealing rings are: rubber sealing ring of assembled pipe joint, rubber sealing ring of pipe clamp of assembled pipe joint, rubber sealing ring of flange of assembled pipe joint, which are required to have Excellent medium resistance, tear resistance, tensile strength, good elongation, compression deformation r...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the rapid development of the domestic economy, there are more and more high-rise commercial and civil buildings, and the fire-fighting water pipelines of these high-rise buildings are also essential key safety facilities. The joints of these water pipelines are used The rubber sealing ring is the most important key component of the system. The commonly used sealing rings are: rubber sealing ring of assembled pipe joint, rubber sealing ring of pipe clamp of assembled pipe joint, rubber sealing ring of flange of assembled pipe joint, which are required to have Excellent medium resistance, tear resistance, tensile strength, good elongation, compression deformation resistance, heat aging resistance, long service life (at least 50 years), etc., and this kind of rubber sealing ring is currently used in China Unsatisfactory function, service life and safety

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