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Glass fibrofelt laminated plate and preparation method thereof

A technology of glass fiber felt and alkali-free glass fiber, which is applied in the field of laminates and its preparation, can solve the problems of not meeting the requirements of heat resistance, low test value, poor processing technology, etc., and achieve improved tracking resistance , simple preparation process and excellent product quality

Active Publication Date: 2017-05-10
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For a long time, glass fiber mat laminates have poor processing technology due to the fluffy and disordered fiber bundles in the glass fiber mat and poor mutual binding force. High mechanical strength cannot be maintained under the environment, and the tracking resistance performance is also extremely poor, which cannot fully meet the requirements for the use of glass fiber felt laminates in large-scale generator sets and nuclear power generator sets
The main problem is: under the existing technology, the glass fiber felt laminate can only reach F grade, the bending strength under normal conditions is 445±10MPa, the bending strength at 155°C is 300±10MPa, and the bending strength at 180°C is only 200±10MPa. Low and the bending strength at 180°C does not meet the basic requirements of more than 50% of the bending strength under normal conditions, so it does not meet the heat resistance requirements of H-grade and C-grade materials

Method used

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  • Glass fibrofelt laminated plate and preparation method thereof
  • Glass fibrofelt laminated plate and preparation method thereof
  • Glass fibrofelt laminated plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0041] At room temperature, add 55 parts of bisphenol-A epoxy resin, 18 parts of boron-modified phenolic resin, and 20 parts of inorganic powder aluminum hydroxide into the glue tank, stir at 70°C for 2 hours, then add the curing agent 35 parts of 4,4-diaminodiphenylmethane, 120 parts of toluene, stir for 1 hour to make it fully dispersed, add 0.5 part of accelerator 2-methylimidazole to adjust the molding time of the glue, take samples, and test with a knife method The molding time of the glue solution (180°C hot plate) is 470 seconds, and the glue solution is prepared.

Embodiment 1-2

[0043] At room temperature, add 33 parts of bisphenol F epoxy resin, 60 parts of silicone modified phenolic resin, and 30 parts of inorganic powder alumina into the glue tank, stir at 130°C for 1 hour, then add curing agent Mix 29 parts of low-molecular-weight polyamide and 110 parts of xylene, stir for 0.42 hours to fully disperse them evenly, add 1 part of accelerator 2-ethyl-4-methylimidazole to adjust the molding time of the glue, take samples, and use the knife method Test the molding time of the glue solution (180°C hot plate) for 520 seconds, and the glue solution is prepared.

Embodiment 1-3

[0045] At room temperature, add 40 parts of polybutadiene epoxy resin, 25 parts of benzoxazine-modified phenolic resin, and 30 parts of inorganic powder aluminum nitride into the glue tank respectively, and stir at 120°C for 2.5 hours. Add 25 parts of curing agent 4,4-diaminodiphenyl sulfone and 130 parts of dimethylformamide, stir for 0.5 hours to make them fully dispersed, then add 0.08 parts of boron trifluoride ethylamine to adjust the molding of the glue Time, sampling, test the molding time of the glue solution (180°C hot plate) for 450 seconds with the knife method, and the glue solution is prepared.

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Abstract

The invention discloses a glass fibrofelt laminated plate and a preparation method thereof. The glass fibrofelt laminated plate and the preparation method thereof are characterized in that the glass fibrofelt laminated plate is a composite material prepared by performing hot-press molding on one layer or more than one layer overlapped high-strength tracking-resistant resin glass fibrofelt prepreg, and the tracking-resistant index is more than or equal to 600 V; the prepreg is a material formed by dipping or spray-coating a high-strength tracking-resistant resin adhesive on alkali-free glass fibrofelt and then roasting; and the high-strength tracking-resistant resin adhesive consists of 20 to 55 parts by weight of high-temperature-resistant epoxy resin, 15 to 60 parts by weight of modified phenolic resin, 10 to 35 parts by weight of a curing agent, 5 to 35 parts by weight of inorganic powder, 0.01 to 1 part by weight of an accelerant and 100 to 130 parts by weight of a solvent. The glass fibrofelt laminated plate provided by the invention is suitable for manufacturing of insulation structural components of large generator sets and nuclear power generators as well as manufacturing of high-temperature-resistant high-strength insulating composite materials for motors, transformers, military products and the like under the high-temperature working environment.

Description

technical field [0001] The invention belongs to a laminate and its preparation, and relates to a glass fiber felt laminate and a preparation method thereof, in particular to a glass fiber felt laminate for electrical appliances with high temperature resistance, high strength and high tracking resistance and a preparation method thereof . The product of the invention is especially suitable for the manufacture of insulating structural parts of large generator sets and nuclear power generators, as well as the manufacture of high-temperature-resistant and high-strength insulating composite materials for motors, transformers, and military products in other high-temperature working environments. Background technique [0002] Glass fiber felt laminates are widely used in large power generation equipment, nuclear power equipment, motors and transformers due to their unique excellent properties such as isotropy, good machinability, creepage resistance, no warping, and no delamination...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/02B32B17/04B32B17/06B32B7/12B32B33/00B32B37/06B32B37/10B32B37/12C09J163/00C09J161/14
CPCB32B5/02B32B7/12B32B17/067B32B33/00B32B37/06B32B37/10B32B37/12B32B2250/20B32B2255/02B32B2255/26B32B2260/021B32B2260/046B32B2262/101B32B2307/306C09J161/14C09J163/00C08L61/14C08L63/00
Inventor 杜旻黄洪驰刘锋邵亚婷彭晓伟
Owner SICHUAN DONGFANG INSULATING MATERIAL
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