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A production process of non-woven material for electrical insulation

A technology of electrical insulation and production technology, applied in the direction of textiles and papermaking, non-woven fabrics, fiber processing, etc., can solve the problems that cannot meet the requirements of high temperature resistance and high pressure use, and achieve the effect of meeting high temperature resistance

Active Publication Date: 2021-01-15
杭州金百合非织造布有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention overcomes the deficiency that traditional electrical insulation materials cannot meet the requirements of high temperature resistance and high pressure use, and provides a production process of nonwoven materials for electrical insulation. The insulation material produced by this process can withstand voltages above 3000V, and the working temperature is 130 -260℃, can meet the requirements of high temperature resistance and high pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: A production process of non-woven materials for electrical insulation, including the following steps: (1) Opening and mixing, preparing raw materials 12 hours in advance, and discharging raw materials into discs after unpacking, and the discharged fibers are 100% polyester Or a homogeneous mixture of 10%-40% aramid and 90-60% polyester, aramid adopts para-aramid, the fiber fineness of polyester and aramid is 1.5D-2D, the fiber length of polyester and aramid 32mm-76mm, generally choose 32mm, 48mm, 51mm, 64mm, 76mm. After the fibers are discharged into the disc, they are transported by the fan to the cotton mixer for fiber mixing. The mixed fibers are stored in multiple fiber bins, and the weight of the fibers stored in each fiber bin is equal. After the fibers in these fiber bins are output Stacked up and down, the stacked fibers are conveyed to the opener for fine opening, and the finely opened fibers are mixed and sent to the high cotton box according to a f...

Embodiment 2

[0017] Example 2: A production process of a non-woven material for electrical insulation, the process steps are similar to Example 1, the main difference is that in this example, after step (3) the fiber web is reinforced, the fiber web is passed through two indentations Between the rollers, a number of creasing bumps are evenly distributed on the outer wall of one creasing roller, and several creasing pits are arranged on the surface of the other creasing roller corresponding to the creasing bumps. The rollers rotate synchronously, and the indentation bumps press the fiber web into the indentation pits to form several protrusions on the fiber web. Several protrusions are uniformly distributed on the insulating cloth produced by this step. The insulating cloth is installed between the coil and the magnetic steel. The protrusions prevent the insulating cloth from being closely attached to the coil and the magnetic steel, so that Insulating glue is poured between the insulating ...

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PUM

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Abstract

The invention discloses a production process of a nonwoven material for electrical insulation and aims to solve the problem that a traditional electrical insulation material fails to meet the utilization requirement of resistance to high temperature and high voltage. By fiber opening and mixing, fine opening, carding into a web and fiber web reinforcing, light and thin insulating cloth with uniformly distributed fibers and resistant to 130-260DEG C is formed. A softening temperature of polyester fibers is close to 230 DEG C, and the fibers contact mutually after fiber carding and are pressurized by a hot roll to realize heat bonding of the fibers and form bonding points, so that a fiber web is reinforced to form cloth. Aramid fibers and polyester fibers are proportionally mixed to serve asa raw material, and due to the characteristic of low softening point of polyester fibers, the aramid fibers and the polyester fibers are carded to enable fiber contact, and the polyester fibers are adhered to the aramid fibers at 250-265DEG C to form the cloth.

Description

technical field [0001] The invention relates to a non-woven material manufacturing technology, more specifically, it relates to a non-woven material production process for electrical insulation. Background technique [0002] Currently, in electric motors, the insulation around the conductors isolates the turns from each other and from the grounded stator core for safe operation of the motor. The development and progress of insulating materials depends on the development of polymer materials to meet the needs of the continuous development of electrical products. Now the insulation material industry has begun to appear new F-class and H-class insulation material systems. The conventional thickness of traditional electrical insulating materials is 0.08-0.25mm, its breakdown voltage is around 800V, and its limit working temperature is often 90°, which cannot meet the requirements of high temperature resistance and high voltage use. Contents of the invention [0003] The inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4382D04H1/485D01G23/00
CPCD01G23/00D04H1/4382D04H1/485
Inventor 孙武平宋建勇马小繁刘欣怡
Owner 杭州金百合非织造布有限公司