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Sealing gasket covered with carbon-fiber covering yarn and preparation method of sealing gasket

A technology of sealing gasket and core-spun yarn, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of poor spinnability and other problems, and achieve good thermal shock resistance, low expansion coefficient and low friction coefficient. Effect

Active Publication Date: 2016-09-28
DONGTAI HUAYANG GLASS FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, carbon fiber is light in texture, smooth in surface, easy to loose, and has poor spinnability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Embodiment: the preparation method of carbon fiber core-spun yarn covering sealing gasket, comprises the following steps:

[0028] (1) Ingredients mixing: mix polytetrafluoroethylene, nitrile rubber, graphite, natural rubber, coke powder, vermiculite powder, barite powder, aramid fiber and glass fiber according to 2:2:3:3:2:1: 1:2:3 is put into the high-speed mixer and stirred for 7-12 minutes, the stirring rate of the high-speed mixer is 3000-3500 rpm, and the mixed material is prepared for later use;

[0029] (2) Carbon fiber core-spun yarn layer: Prepare a composite molding agent by mixing the silane coupling agent and antistatic agent in a ratio of 1:1, put the glass fiber bundles into the composite molding agent and soak for 2-3 minutes, take it out and drip dry, Then wind the metal wire evenly on it, and then evenly wind the expanded carbon fiber on the outside of the metal wire and the glass fiber bundle according to the twist direction of S50~S100; finally use t...

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PUM

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Abstract

The invention discloses a sealing gasket covered with carbon-fiber covering yarn. The sealing gasket comprises two mixed padding layers, a reinforcing fiber layer and a carbon-fiber covering yarn layer, wherein the reinforcing fiber layer is located between the two mixed padding layers, and the carbon-fiber covering yarn layer is arranged at the outer side of the sealing gasket in a covering manner. The sealing gasket is made of polytetrafluoroethylene, nitrile rubber, graphite, natural rubber, coke powder, vermiculite powder, barite powder, aramid fibers and glass fibers, and therefore the sealing gasket has the beneficial effects of being quite low in friction coefficient, quite good in high temperature stability and heat shock resistance, quite high in strength and heat conductivity coefficient, low in expansion coefficient, quite high in electrical resistivity, resistant to corrosion and capable of allowing microwaves or infrared rays to permeate and the like, the natural rubber is quite high in elasticity, and therefore the sealing gasket is quite good in elasticity and plasticity; the periphery of the sealing gasket is covered with the carbon-fiber covering yarn layer, and therefore the sealing gasket has the beneficial effects of being quite high in acid resistance, alkali resistance, corrosion resistance and abrasion resistance; and in addition, the sealing gasket is subjected to vulcanization treatment, so that the sealing gasket is durable and not prone to aging.

Description

technical field [0001] The invention relates to a sealing material, in particular to a sealing gasket covered with carbon fiber core-spun yarn and a preparation method thereof. Background technique [0002] In the prior art, the application number is CN200910094494.3 The Chinese invention patent titled "A Method for Preparing Sheets for Sealing Gaskets" relates to a method for manufacturing sealing gaskets, especially for sealing gaskets that do not contain asbestos fibers The invention relates to a method for preparing a sheet material for a gasket, and relates to the field of sealing materials. The main components of the sheet material in this invention are mineral wool fiber, cellulose fiber, aromatic polyfiber, rubber binder and kaolin, mixed into an aqueous dispersion system, gradually dehydrated into layers by papermaking technology, and then compressed , drying and vulcanization, and made into finished sheet products. The sealing gasket made of this board has the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/10F16J15/20C08L7/00C08L27/18C08L9/02C08L77/10C08K13/04C08K7/14C08K3/04C08K3/30C08K3/34
CPCC08K2201/014C08L7/00C08L2205/035C08L2205/16F16J15/102F16J15/108F16J15/20C08L27/18C08L9/02C08L77/10C08K13/04C08K7/14C08K3/04C08K2003/3045C08K3/34
Inventor 钱华钱忠标史玉庆余淑莉钱家蓉史睿阳
Owner DONGTAI HUAYANG GLASS FIBER
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