Method for preparing copy sheet used for sealing gasket

A sealing gasket and plate technology, which is applied in the direction of fiberboard, inorganic fiber/sheet, synthetic cellulose/non-cellulose material pulp/paper, etc., can solve the problems of poor strength and oil resistance, high price, and difficulty in leading products, etc. , to achieve the effect of reasonable selection and cost reduction

Inactive Publication Date: 2009-11-11
KUNMING UNIV OF SCI & TECH +1
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  • Abstract
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  • Application Information

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Problems solved by technology

For a long time, because Chinese researchers have not found high-quality and cheap asbestos substitute materials, the strength and oil resistance of the products are poor, the price is higher than that of asbestos products, and the cost performance is poor, so it is difficult to become the leading product in the market

Method used

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  • Method for preparing copy sheet used for sealing gasket
  • Method for preparing copy sheet used for sealing gasket
  • Method for preparing copy sheet used for sealing gasket

Examples

Experimental program
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Effect test

Embodiment

[0023] The present invention has preferred two formulas, which can be further illustrated by the following examples:

[0024]

[0025] First, aramid pulp, cellulose fiber and active agent are pulped at a speed of 6000 rpm for about 6 minutes, then fillers are added, stirred for 5 minutes, mixed into a slurry, dispersed evenly, and finally mineral wool fibers are added and pulped 5 minutes. Dilute the suspension after pulping with water, gradually add nitrile latex and styrene-butadiene latex through slow stirring, dilute with water 5 times its own capacity, and continue stirring until a good suspension is formed, and the latex is completely absorbed .

[0026] The pH in the slurry can be lowered to 4.5 by adding paper alum (aluminum sulfate). The upper liquid in the mixture became clear after the agitation was stopped, which indicated that the dispersed particles of latex had been deposited on the fine particles of fibers and fillers. Additional water was added and stirr...

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Abstract

The invention relates to a method for manufacturing a sealing gasket, in particular to a method for preparing a copy sheet used for a sealing gasket which does not contain asbestos fiber, belonging to the field of sealing materials. The copy sheet contains the main components of mineral cotton fiber, cellulose fiber, aromatic polyamide fiber, rubber cement and kaoline; the components are mixed to a dispersed system containing water, then a paper-making technique is adopted to dehydrate gradually and form a layer, and a finished product of the copy sheet is manufactured by compression, drying and vulcanization. The sealing gasket manufactured by the sheet has tensile strength, compression resilience performance, medium resistance and sealing performance and the like equivalent to that of the copying asbestos sealing gasket and can completely replace asbestos sheets for manufacturing the sealing materials of the gasket and the like.

Description

technical field [0001] The invention relates to a method for manufacturing a sealing gasket, which belongs to the field of sealing materials. Background technique [0002] Gaskets are widely used in petroleum, chemical, machinery, automobile and other industries. Boards with asbestos fibers as reinforcement are traditionally used. Asbestos is bound together with cellulose fibers and fillers by binders and made using traditional papermaking equipment (such as fourdrinier paper machines), so in fact this type of material is also called "asbestos paper". Due to the pollution of asbestos to the environment and the harm to the human body, all industrial countries in the world have strict restrictions on the production, sale and use of asbestos products. The State Economic and Trade Commission listed asbestos products as the second batch of eliminated products in 2001. The new national standard GBI2676-1999 "Structure Performance and Experimental Methods of Automobile Brakes" r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J1/16D21H13/36D21H13/26D21H17/67D21H17/68D21H21/00D21H21/06D21H21/12
Inventor 刘美红杨建忠黎振华张椿林曾镇国陈君若
Owner KUNMING UNIV OF SCI & TECH
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