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A high-temperature stable flame-retardant insulating composite material for generators

An insulating composite material, high-temperature stable technology, applied in the direction of organic insulators, insulators, insulators, etc., to achieve the effects of prolonging service life, good flame retardant effect, and good protection effect

Active Publication Date: 2020-08-14
SUI ON LAMINATION MATERIALS SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the temperature resistance of traditional composite materials needs to be further improved, the dimensional stability at high temperature needs to be improved, and the shrinkage rate needs to be further reduced to meet the requirements of high-end motors in specific fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The insulating composite was prepared as follows:

[0026] The main agent macromolecular polyester adduct (such as COLFLEX HP7450 HP7450), curing agent hexamethylene diisocyanate adduct (such as Hardeer Z), acetone, aluminum oxide (α-Al 2 o 3 ), vinyl triethoxysilane and dimethyl methyl phosphate according to the mass ratio of 100: 10: 50: 1.1: 0.1: 17, stir evenly, and then apply it on the polyimide film, after drying After drying, it is combined with two layers of polyoxadiazole fiber paper to obtain a composite material for a generator.

[0027] After testing, the high-temperature stable flame-retardant insulating composite material for generators obtained in this example has no delamination, no foaming, and no glue flow under the heat aging conditions of 240°C / 24H and 220°C / 3000H; it has passed the UL94 V0 level of flame retardancy Test; at 300°C for 60 minutes, the rate of change in transverse and longitudinal dimensions is 2.2%, which does not meet the requireme...

Embodiment 2

[0029] The insulating composite was prepared as follows:

[0030] Main agent macromolecular polyester adduct (such as LOCTIFE LA2681), curing agent hexamethylene diisocyanate adduct (such as LOCTIFE LA5500), acetone, whisker silicon, 3-glycidyl ether oxypropyl trimethoxy Silane and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide were treated at a mass ratio of 100:15:62:5:0.3:25, stirred evenly, and then coated on poly The imide film is dried and then hot-pressed and laminated with two layers of polyoxadiazole fiber paper to obtain a high-temperature stable flame-retardant insulating composite material for generators.

[0031] After testing, the high-temperature stable flame-retardant insulating composite material for generators obtained in this example has no delamination, no foaming, and no glue flow under the heat aging conditions of 240°C / 24H and 220°C / 3000H; it has passed the UL94 V0 level of flame retardancy Test; at 300°C for 60 minutes, the rate of change in transv...

Embodiment 3

[0033] The insulating composite was prepared as follows:

[0034]Main agent macromolecular polyester adduct (such as LOCTIFE LA2681), curing agent hexamethylene diisocyanate adduct (such as LOCTIFE LA5500), acetone, whisker silicon, 3-glycidyl ether oxypropyl trimethoxy Silane and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide were treated at a mass ratio of 100:15:62:5:0.3:25, stirred evenly, and then coated on poly The imide film is dried and then hot-pressed and laminated with two layers of polyoxadiazole fiber paper to obtain a high-temperature stable flame-retardant insulating composite material for generators.

[0035] After testing, the high-temperature stable flame-retardant insulating composite material for generators obtained in this example has no delamination, no foaming, and no glue flow under the heat aging conditions of 240°C / 24H and 220°C / 3000H; it has passed the UL94 V0 level of flame retardancy Test; at a high temperature of 300°C for 60 minutes, the rat...

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Abstract

The invention relates to the field of electrical insulating materials, and discloses a high-temperature-stable flame-retardant insulating composite material for a generator. The composite material isa three-layer composite material, wherein the first layer is a polyoxadiazole fiber paper outer layer, the second layer is a polyimide film intermediate layer, the third layer is a polyoxadiazole fiber paper outer layer and the intermediate layer film layer and the outer layer paper layer are combined by a dry composite method through modified polyurethane glue. The high-temperature-stable flame-retardant insulating composite material for the generator has higher temperature resistance grade, better dimensional stability, better flame-retardant effect, longer service life of the material and better protection effect on the motor. Specifically, the material is capable of withstanding 240 DEG C / 24H and 220 DEG C / 3000H tests without delamination, foaming or glue flow, the lateral and longitudinal dimension change rate is not higher than 1% at the high temperature of 300 DEG C for 60 minutes, and the material can pass the UL94 V0 grade flame retardancy test of the flammability test of plastic materials for equipment and appliance components.

Description

technical field [0001] The invention relates to the field of electrical insulating materials, in particular to a high-temperature stable flame-retardant insulating composite material for generators. Background technique [0002] The insulation materials of traditional motors include simple insulating paper, simple insulating film and flexible insulating materials composed of paper and film multilayers. Stability, low shrinkage at high temperature, flame retardant and fire protection requirements are all put forward higher and higher requirements. The research on the premature failure of the motor insulation has found that the pulse square wave output by the pulse width modulation power supply used by the motor makes the motor withstand The voltage is more than 10 times the average voltage, which is the root cause of premature breakdown of the motor insulation layer. The combined effect of electrical, thermal, mechanical and environmental factors caused by pulse overvoltage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/60H01B17/66H01B3/30H01B3/52H01B19/00
CPCH01B3/306H01B3/307H01B3/52H01B17/60H01B17/66H01B19/00
Inventor 陈明义段红军陈刚
Owner SUI ON LAMINATION MATERIALS SHENZHEN