Manufacturing process for asbestos-free sealing gasket

A sealing gasket and manufacturing process technology, which is applied in the field of asbestos-free sealing gasket manufacturing technology, can solve the problems of high quality requirements for workers, large differences in product quality of manufacturers, failure and leakage, etc.

Active Publication Date: 2017-06-20
TONGLING JINLI ELECTRONICS
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  • Abstract
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Problems solved by technology

Nowadays, many industrially developed countries in the world have promoted non-asbestos materials to various application fields, and completely banned the use of any asbestos-containing materials; most of the non-asbestos sealing gaskets researched and developed in China are traditional sealing products. There are large differences in the quality of products among them, and the performance indicators also need to be improved.
[0004] The early asbestos-free gaskets were mainly prepared by rubber mixing and molding technology, but with the improvement of the requirements for sealing pr

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0017] A manufacturing process of an asbestos-free sealing gasket is characterized in that it comprises the steps of,

[0018] S1, select raw materials: use aramid fiber 1414 pulp as the main material, and its long diameter is 60-120 mesh, choose iron wood leaf pulp as the reinforcing fiber, and its long diameter is 100-120, choose 4012 mineral wool as the matching fiber, its The long diameter is 40-220 mesh; the glue is styrene-butadiene latex and nitrile latex; the filler is 1500-mesh kaolin, 800-mesh talcum powder and 400-mesh mica powder; liquid aluminum sulfate is used as the coagulant; polydimethylsiloxane is used Alkane organosilicon defoamer; choose inorganic flocculant; choose aramid 1414 pulp as the main fiber of asbestos-free sheet, aramid 1414 pulp has the characteristics of high strength, good dimensional stability and high temperature resistance, and is used When used as a gasket composite material, it can be well bonded to other media, and the resulting gasket h...

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Abstract

The invention discloses a manufacturing process for an asbestos-free sealing gasket. An asbestos-free beater-addition sealing paperboard is manufactured through a beater-addition process by taking aramid fibre 1414 pulp as a main material, matching cellulose fibres and mineral cotton fibres as hybrid fibres to replace asbestos fibres, selecting a mixture of butadiene-acrylonitrile latex and styrene-butadiene latex as latex, selecting kaolin, talcum powder and mica powder as filler, and determining a reasonable formula range of the compositions, wherein the asbestos-free beater-addition sealing paperboard has the ignition loss of less than or equal to 35 percent, the compression ratio of equal to 25+/- 5 percent, the rebound rate of greater than or equal to 45 percent, the tensile strength of greater than or equal to 5 MPa, and the creep relaxation rate of less than or equal to 30 percent.

Description

technical field [0001] The invention relates to a manufacturing process of a non-asbestos sealing gasket. Background technique [0002] Non-metallic gaskets are mainly made of non-metallic materials such as rubber, resin, polytetrafluoroethylene, and asbestos. The non-metallic gasket containing asbestos shows its excellent tensile strength, creep relaxation performance, heat resistance and medium resistance, etc., and the sealing gasket made of it is particularly superior in high temperature and high pressure sealing occasions. However, during the production or use of asbestos-containing sealing gaskets, asbestos will split into extremely fine meta-fibers, and the micro-fibers will cause extremely serious harm to human health. [0003] It has been recognized internationally that asbestos is a carcinogen. In the 1970s, the developed industrial countries first proposed the asbestos-free plan. After more than 20 years of hard work, the United States, Japan, Australia and oth...

Claims

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Application Information

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IPC IPC(8): C09K3/10F16J15/10D21H13/26D21H13/36D21H17/34D21H17/68D21H17/59D21F13/00D21H15/10D21H21/12
CPCC09K3/10C09K2200/023C09K2200/0243C09K2200/026C09K2200/0265C09K2200/0278C09K2200/0615C09K2200/0667C09K2200/0685D21F13/00D21H13/26D21H13/36D21H15/10D21H17/34D21H17/59D21H17/68D21H21/12F16J15/102
Inventor 凌巧钱胜利
Owner TONGLING JINLI ELECTRONICS
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