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Processing method of low temperature resistant and oil resistant rubber sealing ring

A technology of rubber sealing ring and processing method, which is applied in the processing field of low temperature and oil resistant rubber sealing ring, can solve the problems that the seal is difficult to maintain elasticity and sealing performance, and the low temperature resistance performance is reduced, so as to improve the mechanical properties and enhance the low temperature resistance. performance and compression set resistance, the effect of good mechanical properties

Inactive Publication Date: 2018-10-19
安徽龙行密封件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the content of acrylonitrile increases, the oil resistance performance increases and the low temperature resistance performance decreases. The brittleness temperature is generally -30°C. It is difficult for the seal to maintain good elasticity and sealing performance when used in cold winter regions.

Method used

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  • Processing method of low temperature resistant and oil resistant rubber sealing ring
  • Processing method of low temperature resistant and oil resistant rubber sealing ring
  • Processing method of low temperature resistant and oil resistant rubber sealing ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Batching: take the raw materials of the following parts by weight, and obtain the rubber compound after being mixed by a high-speed mixer;

[0038] Nitrile rubber (acrylonitrile content is 31-35wt%) 60kg, rare earth butadiene rubber BR Nd40 10kg, kaolin 5kg, sepiolite powder 5kg, ultrafine polytetrafluoroethylene powder 2kg, C5 hydrogenated petroleum resin 2kg, accelerator TiBTM 0.5kg, anti-aging agent 44PD 0.5kg, anti-reversion agent Perkalink900 0.5kg, lubricant calcium stearate 0.5kg;

[0039] (2) Mixing: The mixing process is divided into two stages. In the first stage, the mixing temperature is 110-120°C, the mixing speed is 120r / min, and the mixing time is 10min. The cooling speed is cooled to 20-30°C and kept for 3 hours, the second stage mixing temperature is 140-150°C, mixing speed is 120r / min, and mixing time is 10min;

[0040] (3) Vulcanization: Extrude the kneaded rubber material into molding, then inject the molded film into the mold of the vulcanizer,...

Embodiment 2

[0045] (1) Batching: take the raw materials of the following parts by weight, and obtain the rubber compound after being mixed by a high-speed mixer;

[0046]Nitrile rubber (acrylonitrile content is 31-35wt%) 70kg, rare earth butadiene rubber BR Nd40 10kg, kaolin 5kg, sepiolite powder 5kg, ultrafine polytetrafluoroethylene powder 3kg, C5 hydrogenated petroleum resin 2kg, accelerator TiBTM 0.5kg, anti-aging agent 44PD 0.5kg, anti-reversion agent Perkalink900 0.5kg, lubricant calcium stearate 0.5kg;

[0047] (2) Mixing: The mixing process is divided into two stages. In the first stage, the mixing temperature is 110-120°C, the mixing speed is 120r / min, and the mixing time is 10min. The cooling speed is cooled to 20-30°C and kept for 3 hours, the second stage mixing temperature is 140-150°C, mixing speed is 120r / min, and mixing time is 10min;

[0048] (3) Vulcanization: Extrude the kneaded rubber material into molding, then inject the molded film into the mold of the vulcanizer, ...

Embodiment 3

[0053] (1) Batching: take the raw materials of the following parts by weight, and obtain the rubber compound after being mixed by a high-speed mixer;

[0054] Nitrile rubber (acrylonitrile content is 31-35wt%) 70kg, rare earth butadiene rubber BR Nd40 10kg, kaolin 5kg, sepiolite powder 5kg, ultrafine polytetrafluoroethylene powder 3kg, C5 hydrogenated petroleum resin 2kg, accelerator TiBTM 0.5kg, anti-aging agent 44PD 0.5kg, anti-reversion agent Perkalink900 0.5kg, lubricant 0.5kg;

[0055] (2) Mixing: The mixing process is divided into two stages. In the first stage, the mixing temperature is 110-120°C, the mixing speed is 120r / min, and the mixing time is 10min. The cooling speed is cooled to 20-30°C and kept for 3 hours, the second stage mixing temperature is 140-150°C, mixing speed is 120r / min, and mixing time is 10min;

[0056] (3) Vulcanization: Extrude the kneaded rubber material into molding, then inject the molded film into the mold of the vulcanizer, and vulcanize un...

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Abstract

The invention discloses a processing method of a low temperature resistant and oil resistant rubber sealing ring, and relates to the technical field of sealing ring processing. The method comprises the following technical steps: (1), batching, (2), mixing, (3), vulcanizing, (4), freezing, (5), performing additional vulcanization, and (6), performing finish machining. The method has the advantagesthat nitrile rubber and rear earth butadiene rubber are taken as rubber main materials, and are matched with kaoline, sea-foam stone powder and various functional additives, so that the sealing ring is formed, the sealing ring has excellent mechanical property, and particularly has excellent low temperature resistance, oil resistance and compressive deformation resistance, the sealing effect of the sealing ring in low-temperature environment is guaranteed, and the service life of the sealing ring in the low-temperature environment is prolonged.

Description

Technical field: [0001] The invention relates to the technical field of sealing ring processing, in particular to a processing method for a low temperature and oil resistant rubber sealing ring. Background technique: [0002] With the rapid development of the modern machinery industry, the demand for rubber seals continues to increase. The lowest temperature in winter in Northeast and Northwest my country is below -40°C. In these areas, the winter is cold for a long time and the temperature difference between day and night is large. There are a lot of power, petroleum, chemical and other equipment exposed to the natural environment. Sunshine, but also to withstand the test of severe cold. In these equipments, there are a large number of rubber seals, although they are small in size, they play a decisive role in the normal operation of the equipment. Rubber seals in these areas are prone to failure due to low temperature brittleness and failure in winter, so the low temperat...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L9/00C08L27/18C08L57/02C08L33/24C08K13/06C08K9/04C08K3/34B29D99/00
CPCB29D99/0053C08L9/02C08L2205/035C08L9/00C08L27/18C08L57/02C08L33/24C08K13/06C08K9/04C08K9/08C08K3/346
Inventor 彭常龙
Owner 安徽龙行密封件有限公司
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