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Production method of meta-position aramid nonwoven material for electric insulation

A non-woven material, electrical insulation technology, used in non-woven fabrics, textiles, papermaking, adhesives, etc., can solve the problems of single aramid insulating material, large static electricity of aramid fibers, low tensile strength, etc. Uniform and dense, high insulation grade performance, thickness and uniform and dense effect

Active Publication Date: 2011-07-06
浙江弘扬无纺新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the papermaking process can only use shorter fibers (2-5mm), long fibers cannot be used, and the resulting product is paper with low tensile strength, so the application is limited
[0004] The spunlace aramid fabric is made by the spunlace non-woven process, which can use long fibers as raw materials, and the obtained product is a non-woven fabric with high tensile strength, but the aramid fiber has high static electricity and is not easy to comb. There are many cloud spots on the appearance, resulting in large local void ratio, large pore size and poor uniformity of the product, which has an impact on the electrical insulation of the product
[0005] Most of the current aramid insulating materials are produced by a single process, and the products have certain defects in tensile strength or electrical insulation.

Method used

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  • Production method of meta-position aramid nonwoven material for electric insulation
  • Production method of meta-position aramid nonwoven material for electric insulation
  • Production method of meta-position aramid nonwoven material for electric insulation

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: Production of insulating material with a thickness of 0.1 mm

[0027] The first step of the spunlace nonwoven process has the following steps:

[0028] Aramid fibers with a fineness of 2 Denier and a length of 51mm are selected; two bale opening machines are used to feed the aramid fibers in proportion to the initial opening, followed by two openings, multi-bin mixing, carding, cross-lapping, In the processes of drawing, spunlace, drum drying, hot air penetration drying and coiling, the antistatic agent aqueous solution is applied according to 4.5% of the total fiber weight before opening or at the multi-compartment mixing place, and the antistatic agent aqueous solution is determined by mass percentage It is composed of 2.5% antistatic agent and 97.5% water to improve the carding effect of fibers.

[0029] The technical requirements of the main equipment or devices in the above process are as follows:

[0030] The main process of the air pressure cotton bo...

Embodiment 2

[0035] Embodiment 2: Production thickness is the insulation material of 0.05mm

[0036] The first step of the spunlace nonwoven process has the following steps:

[0037] Aramid fibers with a fineness of 2 Denier and a length of 51mm are selected; two bale opening machines are used to feed the aramid fibers in proportion to the initial opening, followed by two openings, multi-bin mixing, carding, cross-lapping, In the processes of drawing, spunlace, drum drying, hot air penetration drying and coiling, the antistatic agent aqueous solution is applied according to 4.5% of the total fiber weight before opening or at the multi-compartment mixing place, and the antistatic agent aqueous solution is determined by mass percentage It is composed of 2.5% antistatic agent and 97.5% water to improve the carding effect of fibers.

[0038] The technical requirements of the main equipment or devices in the above process are as follows:

[0039] The main process of the air pressure cotton box ...

Embodiment 3

[0044] Embodiment 3: produce the product of 0.035mm

[0045] The first step of the spunlace nonwoven process for the production of aramid substrates has the following steps:

[0046] Aramid fibers with a fineness of 1.5 denier and a length of 38mm are selected; two bale opening machines are used to feed the aramid fibers in proportion to the initial opening, followed by two openings, multi-bin cotton blending, carding, web laying, For the hydroentangled nonwoven process of drafting, spunlace, drum drying, hot air penetration drying and coiling, apply antistatic oil and water and antistatic agent according to 4.5% of the total fiber weight before opening or at the multi-compartment mixing place The mixture consists of 2.5% antistatic agent and 97.5% water to improve the carding effect of fibers.

[0047] The technical requirements of the main equipment or devices in the above process are as follows:

[0048] The main process of the air pressure cotton box in front of the card...

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Abstract

The invention discloses a production method of a meta-position aramid nonwoven material for electric insulation. Present aramid insulating materials are mostly produced by using a single process method, and products have certain defects on properties, i.e. tensile strength or electric insulation, and the like. The production method comprises the following steps of: producing a spunlace aramid fabric by adopting a low-quantitation strong-carding less-drafting and low-tension spunlaced nonwoven process by using aramid fibers as raw materials; then carrying out prewetting treatment on the spunlace aramid fabric by using a roller transfer method or an immersion method; and then placing a prewetted fabric roll on a continuous overpressure hot mill provided with a vertical type hot roll to carry out continuous and vertical type overpressure hot rolling so as to obtain the meta-position aramid fabric. The obtained insulating material meta-position aramid fabric has small thickness, uniformity, compactness, high tensile strength and high insulation class properties and can be widely used as the insulating materials of insulation class electric equipment, such as an H-class generator, a motor, a transformer, and the like.

Description

technical field [0001] The invention relates to the field of nonwoven materials, in particular to a production method of meta-aramid nonwoven materials for electrical insulation. Background technique [0002] Aramid is a high-performance fiber with high temperature resistance, insulation, and flame retardancy. One of its main uses is to manufacture insulating materials for motors, generators, and transformers with high insulation levels. In the 1960s, DuPont of the United States invented the high-performance fiber meta-aramid fiber (Nomex fiber, called aramid fiber 1313 in my country) with high temperature resistance and flame retardant properties, and developed an electrical insulation material papermaking method based on this Aramid and hydroentangled aramid. [0003] The paper-making method of aramid insulation material is to use aramid fiber and aramid pulp as raw materials, copy it into paper, and then heat press it. Since the papermaking process can only use shorter f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/48D04H1/492D04H1/549
Inventor 王殿生杨永兴
Owner 浙江弘扬无纺新材料有限公司
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