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Graphite sealing material and preparation method thereof

A graphite sealing and graphite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as sealing failure, meson leakage, continuous or intermittent high temperature, meson pressure, meson corrosion, pre-tightening stress, etc.

Active Publication Date: 2017-05-24
长春蓝天密封技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in recent years, due to the influence of environmental protection conditions, the use of this gasket material has gradually been more and more restricted.
The relatively environmentally friendly non-asbestos gaskets, in the process of use, under the action of continuous or intermittent high temperature, meson pressure, meson corrosion, and pre-tightening stress, the high temperature resistance of the gasket is reduced, resulting in meson leakage and sealing failure.

Method used

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  • Graphite sealing material and preparation method thereof
  • Graphite sealing material and preparation method thereof
  • Graphite sealing material and preparation method thereof

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preparation example Construction

[0063] The present invention also provides a kind of preparation method of graphite sealing material, comprises the following steps:

[0064] 1) After mixing fibers, rubber, rubber additives, non-asbestos fibers and fillers, a masterbatch is obtained;

[0065] 2) Rolling and vulcanizing the masterbatch obtained in the above steps to obtain a sealing material.

[0066] The selection and optimization principles of raw materials in the above preparation method in the present invention can correspond to the selection and optimization principles of raw materials in the aforementioned graphite sealing material, and will not be repeated here.

[0067] The present invention has no special restrictions on the pretreatment process of rubber in the preparation process, and the rubber pretreatment steps well known to those skilled in the art can be used. Those skilled in the art can select and adjust according to actual production conditions, product quality and use requirements. , the r...

Embodiment 1

[0098] Refer to Table 1 for the production formula of graphite sealing liner plate type I.

[0099] Table 1

[0100] Thickness: 0.25~3.00mm Graphite sealing liner plate type I Raw material name Actual dosage (kg) Nitrile rubber 28.00 total 28.00 sulfur powder 0.96 Accelerator 0.90 Zinc oxide 1.80 plasticizer 0.50 Antiaging agent 0.80 total 4.96 Silica 10.00 Kaolin 13.00 graphite powder 45.00 Man-made mineral fiber 44.00 Aramid pulp 10 total 122.00 total 154.96 Toluene 85L Alcohol 22L

[0101] Preparation steps:

[0102] Process 1: Mastication of nitrile rubber

[0103] According to the dosage specified in the formula, weigh the nitrile rubber (tolerance ± 0.2kg);

[0104] The weighed nitrile rubber is masticated twice on a rubber mixing machine with a roller temperature of 42°C, thinned and then punched into a film for later use.

...

Embodiment 2

[0135] Refer to Table 3 for the production formula of graphite sealing backing plate Type II.

[0136] table 3

[0137] Thickness: 0.25~3.00mm Graphite sealing backing plate type II Raw material name Actual dosage (kg) Hydrogenated nitrile rubber 32.00 total 32.00 sulfur powder 1.11 Accelerator 0.94 Zinc oxide 1.50 plasticizer 0.90 Antiaging agent 0.60 total 5.05 Silica 12.00 carbon black 5.00 graphite powder 50.00 Man-made mineral fiber 36.00 Aramid pulp 15.00 total 118.00 total 155.05 Toluene 98L Alcohol 43L

[0138] Preparation steps:

[0139] Process 1: mastication of hydrogenated nitrile rubber

[0140] Weigh the hydrogenated nitrile rubber (tolerance ± 0.2kg) according to the dosage specified in the formula;

[0141] The weighed hydrogenated nitrile rubber is masticated twice on a rubber mixing machine with a roller temperatur...

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Abstract

The invention provides a graphite sealing material prepared from the following raw materials: 30 to 50 parts by weight of graphite, 14 to 75 parts by weight of rubber, 10 to 100 parts by weight of non-asbestos fibers, 5 to 20 parts by weight of a filler, and a rubber auxiliary agent, wherein the amount of the rubber auxiliary agent is 4% to 23% of the amount of the rubber. The graphite sealing material provided by the invention is a non-asbestos graphite sealing material, does not contain an asbestos ingredient; with use of an outstanding characteristic of the improved high temperature resistant level after graphite is combined with the rubber, with supplement of a certain proportion of the graphite and the rubber, and with addition of a specific combination and proportion of other auxiliary agents, the high temperature resistant ability of the sealing material is effectively improved, the use durability of the sealing material in a high temperature working environment is enhanced, and long-term effective sealing is ensured.

Description

technical field [0001] The invention belongs to the technical field of sealing material preparation, and in particular relates to a graphite sealing material and a preparation method thereof. Background technique [0002] Sealing materials refer to materials that can withstand joint displacement to achieve airtight and watertight purposes, and are embedded in joints such as devices and buildings. Sealing materials involve almost all industrial and civil fields, and play an important role in national defense, chemical industry, coal, petroleum, metallurgy, transportation, machinery manufacturing industry and aerospace. Sealing materials are divided into four categories according to their form: fluid sealing materials, non-fluid sealing materials, dynamic seals and static seals, including pump seals, hydraulic seals, flange seals, equipment seals, joint surface seals and auxiliary seals. When used, it can be prepared into liquid or paste, spread between the contact surfaces o...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L15/00C08L77/10C08K13/04C08K7/04C08K3/04C08K3/36C08K3/22C09K3/10
CPCC08K2201/014C08L9/02C08L15/005C08L2201/08C08L2201/14C08L2205/16C09K3/10C09K2003/1078C08L77/10C08K13/04C08K7/04C08K3/04C08K3/36C08K2003/2296
Inventor 隋华
Owner 长春蓝天密封技术开发有限公司
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