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Fiber reinforced graphite rubber plate and its preparation method

A fiber-reinforced, rubber sheet technology, used in the field of sealing devices and manufacturing, can solve the problems of small temperature resistance range, coarse particles, and narrow use conditions, and achieve the effect of large temperature resistance range

Active Publication Date: 2007-04-18
浙江国泰萧星密封材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of rubber as a binder has defects such as low temperature resistance, and it cannot completely replace the working conditions of asbestos gaskets, thus limiting the scope of use of this material; and the graphite content is low, the particles are thick, and it has the potential to be used. Narrow conditions, especially the disadvantages of a small temperature range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The fiber-reinforced graphite rubber sheet of this example has the following composition and mass percentages: 20% rubber, 55% flexible graphite, 10% reinforcing fiber, 5% filler, and 10% vulcanization aid. The reinforcing fiber is aramid short fiber and aramid pulp fiber with a mass ratio of 1:1, the filler is white carbon black, and the vulcanization assistant is sulfur.

[0026] The preparation method of the fiber reinforced graphite rubber plate of this example, its preparation steps are:

[0027] a. Heat-treat the graphite flakes at 1300°C for 0.5 minutes, cool and compact them, and crush them. After crushing, the particle size of the graphite powder is 60-100 mesh. Add flexible graphite powder, operating agent, vulcanization aid, reinforcing fiber, and sol rubber in sequence. mix;

[0028] B, use the special-purpose commercially available G1509-I type stretching machine equipment, utilize the relative rotation roller of different diameters to carry ...

Embodiment 2

[0031] Embodiment 2: The fiber-reinforced graphite rubber sheet of this example has the following composition and mass percentages: 15% rubber, 65% flexible graphite, 7% reinforcing fiber, 7% filler, and 6% vulcanization aid. The reinforcing fiber is aramid staple fiber and aramid pulp fiber with a mass ratio of 1:1, the filler is barium sulfate, and the vulcanization assistant is an accelerator.

[0032] The preparation method of the fiber reinforced graphite rubber plate of this example, its preparation steps are:

[0033] a. Heat-treat the graphite flakes at 1300°C for 0.5 minutes, cool and compact them, and crush them. After crushing, the particle size of the graphite powder is 60-100 mesh. Add flexible graphite powder, operating agent, vulcanization aid, reinforcing fiber, and sol rubber in sequence. mix;

[0034] B, use the special-purpose commercially available G1509-I type stretching machine equipment, utilize the relative rotation roller of different diameters to car...

Embodiment 3

[0039] Embodiment 3: The fiber-reinforced graphite rubber sheet of this example has the following composition and mass percentages: 10% rubber, 75% flexible graphite, 5% reinforcing fiber, 5% filler, and 5% vulcanization aid. The reinforcing fiber is aramid short fiber and aramid pulp fiber with a mass ratio of 1:1, the filler is a mixture of clay and talcum powder, and the vulcanization aid is zinc oxide.

[0040] The preparation method of the fiber reinforced graphite rubber plate of this example, its preparation steps are:

[0041] a. Heat-treat the graphite flakes at 1300°C for 0.5 minutes, cool and compact them, and crush them. After crushing, the particle size of the graphite powder is 60-100 mesh. Add flexible graphite powder, operating agent, vulcanization aid, reinforcing fiber, and sol rubber in sequence. mix;

[0042] B, use the special-purpose commercially available G1509-I type stretching machine equipment, utilize the relative rotation roller of different diamet...

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Abstract

This invention relates to a fiber reinforced graphite rubber plate utilized at pipeline flange and its preparation. It mainly solves the flaws of present techniques using rubber as luting agent and existing low temperature property. It can not completely substitute asbestos gaskets use condition, so it limits the serviceable range of this material; And it also solves the technique problems, such as: graphite content is low, particle is fairly coarse, working condition is narrow, especially the bearing temperature range is fairly small and so on. This invention composition; and quality percentage are: rubber 10-20%, flexibility graphite 55-75%, strengthened fiber 3-10%, stuffing 5-25%, the rest is sulfurizing accessory ingredient. Its preparation: progress heat treatment for graphite piece, after cooling and compact progress shattering, orderly add flexibility graphite powder, operation agent, sulfurizing accessory ingredient, strengthened fiber, sol rubber to mix; use forming piece equipment, utilize relative rotation of roller tube to carry out forming piece and producing piece; utilize flat plate sulfurizing machine to sulfurize half-finished product, yield the invented product.

Description

technical field [0001] The invention relates to a sealing device and a manufacturing method, in particular to a fiber-reinforced graphite rubber plate used on a pipeline flange and a preparation method thereof. Background technique [0002] Compared with foreign products, there is a big gap between the sealing gaskets used for pipeline flanges in my country. Traditional gasket materials represented by asbestos rubber gaskets are still widely used. Harmful, whose use is prohibited or restricted by law or fact. With the development of my country's economy and the improvement of people's living standards, it is the general trend to restrict and eventually ban asbestos materials. At present, the replacement of asbestos gaskets mainly includes the following categories: flexible graphite gaskets, PTFE gaskets, compressed non-asbestos fiber gaskets and various rubber gaskets, but the above-mentioned materials for replacing asbestos have their own defects. For example, flexible gra...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08J5/04C08J3/24C08J5/18C08K3/36B29C35/02
Inventor 孙锦龙
Owner 浙江国泰萧星密封材料股份有限公司
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