A kind of 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 the problems of continuous or intermittent high temperature, muon pressure, muon corrosion, prestressing stress, seal failure, limitation and so on

Active Publication Date: 2018-11-06
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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  • A kind of graphite sealing material and preparation method thereof
  • A kind of graphite sealing material and preparation method thereof
  • A kind of 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 wi...

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...

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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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Patent Type & Authority Patents(China)
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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