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Bismaleimide resin-based composite material, radome and preparation method of bismaleimide resin-based composite material

A technology of bismaleimide resin and maleimide resin, which is applied in the field of bismaleimide resin-based composite materials, radome and its preparation, can solve the problems of high manufacturing cost of autoclave, temperature, Difficult to control pressure, high energy consumption in autoclave molding, etc., to achieve the effects of reduced equipment cost and energy consumption, simple mold design, and reduced wrinkles

Active Publication Date: 2020-02-11
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the composite material products prepared with bismaleimide resin as the matrix material are usually formed by autoclave. Preparation method, bismaleimide resin is used in this publication to prepare composite materials by autoclave molding, but the manufacturing cost of the autoclave itself is high, the energy consumption of autoclave molding is high, the temperature and pressure are difficult to control, and for double Maleimide resin requires higher pressure and temperature for molding. For example, in this publication, an autoclave is used to process under high temperature and high pressure with a pressure of 0.65MPa and a temperature of 150°C-200°C, which requires higher strength. The special autoclave made of special materials greatly increases the cost of bismaleimide resin composite molding equipment and limits the further application of bismaleimide resin composite materials

Method used

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  • Bismaleimide resin-based composite material, radome and preparation method of bismaleimide resin-based composite material
  • Bismaleimide resin-based composite material, radome and preparation method of bismaleimide resin-based composite material
  • Bismaleimide resin-based composite material, radome and preparation method of bismaleimide resin-based composite material

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Embodiment 1

[0034] The bismaleimide resin prepreg adopted in the present embodiment takes D-type quartz fiber cloth as reinforcing material, and the thickness of quartz fiber cloth is 0.14mm, and surface density is 165g / m 2 , the mass content of bismaleimide resin in the prepreg is 60%, the thickness of the prepreg is 0.3mm, and the surface density of the prepreg is 412g / m 2 .

[0035] The method for preparing bismaleimide resin-based composite material and radome described in the present embodiment may further comprise the steps:

[0036] S1. Lay 21 layers of bismaleimide resin prepreg in the mold, wrap and seal it with a vacuum bag film, and then vacuumize the inside of the mold to a vacuum degree of less than 0.08MPa. The bismaleimide resin prepreg is pre-compacted at high temperature, and pre-compacted after the 1st, 5th, 9th, 13th, 17th, and 21st layers are laid, and each pre-compaction is 10 minutes;

[0037] S2. Keep the inside of the mold evacuated until the vacuum degree is les...

Embodiment 2

[0041] The bismaleimide resin prepreg adopted in the present embodiment takes B-type quartz fiber cloth as reinforcing material, and the thickness of quartz fiber cloth is 0.2mm, and surface density is 220g / m 2 , the mass content of bismaleimide resin in the prepreg is 50%, the thickness of the prepreg is 0.35mm, and the surface density of the prepreg is 440g / m 2 .

[0042] The method for preparing bismaleimide resin-based composite material and radome described in the present embodiment may further comprise the steps:

[0043] S1. Lay 21 layers of bismaleimide resin prepreg in the mold, wrap and seal it with a vacuum bag film, and then vacuumize the inside of the mold until the vacuum degree is less than 0.09MPa. The bismaleimide resin prepreg is pre-compacted at high temperature, and pre-compacted after the 1st, 5th, 9th, 13th, 17th, and 21st layers are laid, and each pre-compaction is 20 minutes;

[0044] S2. Keep the inside of the mold evacuated until the vacuum degree i...

Embodiment 3

[0048] The bismaleimide resin prepreg adopted in the present embodiment takes B-type quartz fiber cloth as reinforcing material, and the thickness of quartz fiber cloth is 0.28mm, and surface density is 288g / m 2 , the mass content of bismaleimide resin in the prepreg is 40%, the thickness of the prepreg is 0.4mm, and the surface density of the prepreg is 480g / m 2 .

[0049] The method for preparing bismaleimide resin-based composite material and radome described in the present embodiment may further comprise the steps:

[0050] S1. Lay 21 layers of bismaleimide resin prepreg in the mold, wrap and seal it with a vacuum bag film, and then vacuumize the inside of the mold to a vacuum degree of less than 0.09MPa. The bismaleimide resin prepreg is pre-compacted at high temperature, and pre-compacted after laying the 1st, 5th, 9th, 13th, 17th, and 21st layers respectively, each pre-compaction is 30 minutes;

[0051] S2. Keep the inside of the mold evacuated until the vacuum degree...

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Abstract

The invention provides a bismaleimide resin-based composite material, a radome and a preparation method of the bismaleimide resin-based composite material. The preparation method comprises the following steps that multi-layer bismaleimide resin prepreg is laid in a mold, and is sealed, then vacuumizing is conducted on the interior of the mold, and the bismaleimide resin prepreg is pre-compacted; the interior of the mold is kept vacuumized, and the pre-compacted bismaleimide resin prepreg is subjected to heating and pressurizing treatment; the interior of the mold is kept vacuumized, the bismaleimide resin prepreg subjected to heating pressurization treatment is subjected to gradient heating curing treatment, and a curing temperature is higher than a heating temperature in the step S2; anda cured product obtained in the step S3 is demolded to obtain the bismaleimide resin-based composite material. The preparation method can significantly reduce equipment cost and production energy consumption, and the prepared composite material and the radome have high mechanical strength, high temperature resistance and good dielectric performance.

Description

technical field [0001] The invention belongs to the technical field of composite material products, and in particular relates to a bismaleimide resin-based composite material, a radome and a preparation method thereof. Background technique [0002] A radome is a structure that protects the antenna system from the external environment and is widely used in various communication fields. In terms of performance, the radome should have good electromagnetic wave penetration characteristics and strong mechanical properties to ensure that it can withstand the harsh external environment. Bismaleimide resin is currently one of the most widely used matrix resins for preparing resin composite products in the aviation field. It has good heat resistance, heat resistance, radiation resistance, mechanical properties and processing properties, and is mainly used for aircraft mechanical properties The manufacture of structural parts such as body, wing, vertical tail, horizontal tail, engine...

Claims

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Application Information

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IPC IPC(8): B29C70/34C08J5/24C08L79/08C08K7/10
CPCB29C70/345B29C2791/006C08J5/24C08J2379/08C08K7/10
Inventor 肖沅谕高龙飞张雪梅李松彭喆路秋勉刘红影
Owner 北京玻钢院复合材料有限公司
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