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Preparation method of nanomaterial modified DMD soft composite

A technology of composite materials and nanomaterials, which is applied in the field of composite materials, can solve problems such as low service life and yield, low heat resistance and tear resistance, and cannot meet the requirements of use, so as to improve tear strength and dielectric strength. Electric strength, improve the effect of corona resistance

Inactive Publication Date: 2015-03-25
绵阳润缘电工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, due to the technical defects of domestic similar materials such as low heat resistance and tear resistance, the domestic Y series motors are far lower than the same foreign products in terms of heat resistance level, service life and yield, and cannot meet the needs of large motors, special products, etc. Requirements for use in electrical equipment such as motors and transformers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A preparation method of a nanomaterial-modified DMD soft composite material provided by the invention comprises the following steps:

[0021] Step 1: Use the reverse blade coating method to evenly coat the surface of the polyester film with F-grade polyurethane adhesive, and lay the polyester fiber non-woven fabric on the surface of the polyester film coated with the F-grade polyurethane adhesive. Put it into the press, press it at 2-5MPa for 1-5h, put the pressed polyester film with polyester fiber non-woven fabric into the oven with a temperature of 18-35℃ for curing, and leave it for 2-5 days , the sheet-like DMD composites were obtained.

[0022] Step 2: Add 100-200 parts by weight of F-grade epoxy resin glue, 20-80 parts by weight of powder with a particle size of 5-500 nanometers and 5-10 parts by weight of dispersing aids into a circulating multi-stage ultrasonic dispersing machine at high speed. Stir for 10-30min to obtain F-grade epoxy resin glue mixed with na...

Embodiment 1

[0029] Preparation of grade F epoxy resin glue: add 30 parts by weight of epoxy resin, 15 parts by weight of phenolic resin and 25 parts by weight of polyurethane resin into 150 parts by weight of acetone and mix, stir evenly, add 25 parts by weight of curing agent maleic anhydride Add 5 parts by weight of accelerator triethanolamine into the mixed resin solution, stir evenly, and obtain F-grade epoxy resin glue.

[0030] Preparation of nanomaterial-modified DMD soft composites:

[0031] Step 1: Use the reverse blade coating method to evenly coat the surface of the polyester film with F-grade polyurethane adhesive, and lay the polyester fiber non-woven fabric on the surface of the polyester film coated with the F-grade polyurethane adhesive. Put it into the press, press at 2MPa for 5h, put the pressed polyester film with polyester fiber non-woven fabric into the oven at 25°C for curing, and leave it for 3 days to obtain the sheet-like DMD composite material.

[0032] Step 2: ...

Embodiment 2

[0035] Preparation of grade F epoxy resin glue: add 40 parts by weight of epoxy resin, 10 parts by weight of phenolic resin and 25 parts by weight of polyurethane resin into 105 parts by weight of acetone and mix, stir evenly, add 20 parts by weight of curing agent phthalic anhydride Add 5 parts by weight of accelerator triethanolamine into the mixed resin solution, stir evenly, and obtain F-grade epoxy resin glue.

[0036] Preparation of nanomaterial-modified DMD soft composites:

[0037] Step 1: Use the reverse blade coating method to evenly coat the surface of the polyester film with F-grade polyurethane adhesive, and lay the polyester fiber non-woven fabric on the surface of the polyester film coated with the F-grade polyurethane adhesive. Put it into a press, press at 5MPa for 2 hours, put the pressed polyester film with polyester fiber non-woven fabrics into an oven at 20°C for curing, and leave it for 5 days to obtain a sheet-like DMD composite material.

[0038] Step ...

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Abstract

The invention discloses a preparation method of a nanomaterial modified DMD soft composite. The preparation method comprises the following steps: (1) evenly and fully applying a binder to the surface of a polyester film by use of a reverse scraping method, paving a polyester fiber nonwoven fabric on the surface, fully coated with the binder, of the polyester film and then putting the polyester film with the polyester fiber nonwoven fabric into a press for pressing, and curing the pressed film in a drying oven to obtain a DMD composite; (2) adding a prepared class F epoxy resin glue, nanopowder and a dispersing aid to a disperser for mixing, thereby obtaining the class F epoxy resin glue mixed with the nanopowder; and (3) soaking the DMD composite obtained in the step (1) into the class F epoxy resin glue mixed with the nanopowder, and heating the soaked material to obtain the nanomaterial modified DMD soft composite. According to the preparation method of the nanomaterial modified DMD soft composite, the problems of heat resistance, fast curing of coating, coating thickness and homogeneity of the DMD composite are solved successfully, the tearing strength and the dielectric strength of the material are greatly improved, and corona resistance and the partial discharge resistance of the material are improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a preparation method of a nanomaterial-modified DMD soft composite material. Background technique [0002] As a basic material, insulating material determines the level of the motor and electrical industry. The development of each new type of motor and electrical product must be guided by the development of new insulating materials. [0003] In the 1990s, new F, H-class insulation material systems began to appear, and polyester imide, polyimide imide, polyimide, polymaleimide, polydiphenyl ether, etc. were successively developed. Thermal insulating paints, adhesives and films, as well as a series of new products such as modified epoxy, unsaturated polyester, polyaramid fiber paper and their composite materials. Most of the heat resistance grades of electrical products have been upgraded to B grades, and new F and H grade insulating materials have been used in special motors su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L61/06C08L75/04C08L67/00C08K3/22C08K3/36C08K3/34C08J5/24
Inventor 韩培波
Owner 绵阳润缘电工材料有限公司
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