Solvent-resistant inert resin coated fluororubber sealing rubber plug and manufacturing method thereof

Abstract

The invention discloses a solvent-resistant inert resin coated fluororubber sealing rubber plug and a manufacturing method thereof. The sealing rubber plug comprises the following raw materials: fluororubber, a reinforcing agent, a filling agent, a processing aid, an acid acceptor and a cross-linking agent system, wherein the sealing rubber plug further comprises a fluorine resin film which coversthe neck part of the sealing rubber plug and is subjected to corona discharge treatment; the thickness of the fluorine resin film is 5-100 [mu]m, and the fluorine resin film is one of an ethylene-tetrafluoroethylene copolymer film, a tetrafluoroethylene-perfluoropropyl perfluorovinyl ether copolymer film, a chlorotrifluoroethylene polymer film and a polyvinylidene fluoride film. The preparation method comprises the following steps: rubber material mixing, primary sheet discharging, fluorine film slicing, primary laminating vulcanization, primary punching, secondary sheet discharging, secondary vulcanization and secondary punching. The surface, in contact with a solvent, of the sealing rubber plug is coated with a layer of an inert film, low-molecular-weight organic matters in rubber can be prevented from migrating to the solvent end, the influence of dissolved matters on an organic solvent is avoided, and inaccuracy of a detection result is avoided.

Description

technical field [0001] The invention relates to a solvent-resistant inert resin-coated fluorine rubber sealing rubber plug and a manufacturing method thereof, belonging to the technical field of rubber plugs. Background technique [0002] Chemical measurement is often used in production process analysis and environmental pollution monitoring, and plays an important role in mineral resource detection, meteorological observation and telemetry, industrial automation and medical real-time monitoring, agricultural preservation, anti-theft, security alarm and energy saving. application. [0003] With the rapid development of chemical measurement technology, portable small-scale rapid detection methods are becoming more and more popular. Rapid chemical measuring instruments usually use specific organic solvents, but rubber materials for sealing that are resistant to organic solvents have become a difficult point restricting the rapid development of this industry. [0004] At pres...

AI Technical Summary

Problems solved by technology

Although fluororubber can maintain good performance stability and dimensional stability in the environment of organic solvents, the compounding ingredients in fluororubber will dissolve into organic solvents in the presence of organic solvents and affect the accuracy of test results

Since many detection methods require long-term contact with organic solvents, ordinary rubber materials used for sealing are generally not resistant to organic solvents, especially aromatic hydrocarbon solvents. Long-term contact with solvents will swell and lose their original sealing performance

In addition, due to the complex composition of the rubber itself, it is necessary to add a variety of additives. In particular, most of the vulcanization systems used for rubber crosslinking are low-molecular organic substances, which are easily dissolved into the solvent when they are in contact with organic solvents for a long time, thereby affecting the solvent. the purity of

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