Flame resisting wave-absorbing material and method for making same

A kind of wave absorbing material, flame retardant technology, applied in the parts, shielding, instruments and other directions of the instrument, can solve the problems of affecting the surface appearance quality of the wave absorbing material, poor surface smoothness and poor anti-fouling ability of the wave absorbing material, etc. The effect of saving fire fighting capital investment, solving fire safety hazards, and enhancing adhesion

Inactive Publication Date: 2007-02-07
NANJING BOPING ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still cannot meet the requirements of higher power emission source testing, so absorbing materials with better flame retardancy and higher power withstand are urgently needed to be developed
Moreover, due to the use of non-woven fabrics as the substrate, non-woven fabrics, also known as non-woven fabrics, are mainly formed by dipping or hot-pressing chemical fibers, and the surface fiber hairs are more obvious, so the surface finish of the wave-absorbing material made of this is poor. , Poor anti-fouling ability, etc., also seriously affect the appearance quality of the surface of the absorbing material

Method used

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  • Flame resisting wave-absorbing material and method for making same
  • Flame resisting wave-absorbing material and method for making same
  • Flame resisting wave-absorbing material and method for making same

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Use impregnated non-woven fabric as the matrix; put 40 parts of aluminum-magnesium composite powder, 23 parts of organic adhesive (such as polyvinyl alcohol glue), 7.5 parts of silica sol, 0.1 part of defoamer and 29 parts of water into the disperser respectively Stir and disperse evenly to make a flame-retardant coating; grind the prepared flame-retardant coating with a three-roller grinder to make the coating uniform and fine; add the flame-retardant coating to the tank of the special flame-retardant mechanical brushing equipment, The non-woven fabric is immersed in the flame-retardant coating through the pressure roller, and the 15m long drying tunnel is opened, and the other end of the drying tunnel starts to wind the non-woven fabric, and the flame-retardant coating is evenly coated on the non-woven fabric, and dried; the carbon black 3 38 parts, 38 parts of organic adhesive (such as polyvinyl alcohol glue), 0.1 part of defoamer, 1 part of dispersant, and 57 parts o...

Embodiment 2

[0041] It is basically the same as Example 1, except that the flame retardant coating is prepared as follows: 35 parts of aluminum hydroxide, 20 parts of organic adhesive, 6 parts of silica sol, 0.1 part of defoamer, and 25 parts of water. The conductive coating is prepared as follows: 2.5 parts of acetylene carbon black, 35 parts of organic adhesive, 0.1 part of defoamer, 0.8 part of dispersant, and 50 parts of water.

Embodiment 3

[0043] It is basically the same as Example 1, except that the flame retardant coating is prepared as follows: 45 parts of magnesium hydroxide, 30 parts of organic adhesive, 10 parts of silica sol, 0.3 parts of defoamer, and 35 parts of water. The conductive coating was prepared as follows: 3.4 parts of acetylene carbon black, 42 ​​parts of organic adhesive, 0.3 parts of defoamer, 1.2 parts of dispersant, and 60 parts of water.

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Abstract

The related preparation method for a new flame-resisting wave-absorbing material used on full / semi-anechoic chamber comprises: with non-woven fabrics as basal body, painting flame-retardant coat on both inner and outer surfaces of the fabric, drying; then painting conductive coat on former coat, drying; impressing and forming, and folding into the unit body. This invention improves product performance greatly.

Description

technical field [0001] The invention relates to a novel wave-absorbing material and a preparation method thereof, and mainly relates to an important material used in a full anechoic chamber and a half anechoic chamber, providing a test environment with no reflection free space. Background technique [0002] Wave-absorbing materials have been produced as early as the 1970s, but at home and abroad, soft polyurethane foam is used as the matrix, cut into pyramid shapes, made by chemical coating impregnation, drying and other processes, and then pasted with adhesives and installed in the dark. indoor. [0003] Due to the aging factor of the base material itself, the service life of the polyurethane foam absorbing material can only be guaranteed for 5-8 years. At the same time, due to aging, it will cause powder drop, elbows, and release of organic poisonous gas. Not only the electrical performance of the darkroom will decline, but the test environment cannot be guaranteed; anothe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G12B17/02
Inventor 汪洪王相元程其恒黄忠明刘维新
Owner NANJING BOPING ELECTRONICS TECH CO LTD
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