Conductive paper, conductive tape and preparation method thereof based on meta-aramid

Abstract

The invention discloses an m-aramid fiber-based conductive paper and conductive belt. A preparation method of the m-aramid fiber-based conductive paper comprises the following steps of a, mixing m-aramid short fibers and m-aramid fiber pulp in water, and adding a conductive polymer material into the water so that surfaces of the m-aramid short fibers and m-aramid fiber pulp are coated with the conductive polymer material, b, carrying out wet method papermaking treatment on the mixed solution by an inclined wire former to obtain raw paper, and c, carrying out press polishing on the raw paper to obtain the conductive paper, wherein in press polishing, a temperature is greater than or equal to a glass-transition temperature of m-aramid fiber. Compared with the prior art, the m-aramid fiber-based conductive paper and conductive belt can realize static electricity conduction on the premise of relative insulation to an electronic product, can prevent electrostatic integrating-caused m-aramid fiber-based paper breakdown and is safe and practical.

Description

technical field [0001] The invention relates to a synthetic fiber paper, in particular to a meta-aramid-based conductive paper, a conductive tape and a preparation method thereof. Background technique [0002] With the development of society and economy, various motors, transformers and other electronic equipment are developing rapidly, and the requirements for carrying capacity are getting higher and higher. During the use, transportation and loading and unloading of electronic equipment, static charges are easily generated due to friction. If these static charges are not transferred or released in time and accumulate, and the air itself is prone to contain some flammable substances, an explosion or even a fire will occur. [0003] US Patent 2010206502 relates to the preparation of an aramid conductive belt, specifically 5-65wt% aramid short fiber, 30-90wt% aramid pulp, 1-20wt% conductive filler, wherein the conductive filler is Carbon black is used as the third component ...

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Problems solved by technology

[0003] US Patent 2010206502 relates to the preparation of an aramid conductive belt, specifically 5-65wt% aramid short fiber, 30-90wt% aramid pulp, 1-20wt% conductive filler, wherein the conductive filler is Carbon black is used as the third component of the slurry. Since carbon black is an inorganic particle, the conductivity is relatively small, and it will precipitate in the suspension slurry mainly composed of organic matter, forming an uneven slurry, resulting in aramid conductive band The uneven conduction, the location with less conductive substances, the reduction of electrostatic discharge, long-term accumulation, easy to cause breakdown or explosion, and the color of carbon black is black, which affects the appearance of aramid paper and limits its application range

[0004] Chinese patent 201310339402.X provides a preparation of a conductive composite material, specifically a conductive composite material with poly-p-phenylene terephthalamide as the core and polyaniline as the shell. This conductive composite material can be used to prepare conductive However, since poly-p-phenylene terephthalamide is a rigid molecule, it is easy to break when winding, so it is impossible to prepare conductive tape paper for platinum winding, and it cannot be used in motors and transformers

[0005] The molecular chain of polym-phenylene isophthalamide has a certain flexibility, which is probably between the rigid molecule and the flexible molecule. Therefore, the prepared fiber and paper have a certain toughness, and it is not easy to break when winding. Usually, Poly-m-phenylene isophthalamide fiber is called meta-aramid fiber. Meta-aramid insulating paper prepared from meta-aramid short fiber and pulp plays an irreplaceable role in aerospace, national defense and military affairs. However, meta-aramid paper is prone to static electricity during use, transportation and loading and unloading. After a certain amount of static electricity accumulates, it will break down the aramid paper and seriously affect its use. Therefore, it is necessary to develop a new conductive aramid paper. to solve the above problems

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