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A kind of preparation method of semi-cured double resin system composite material

A composite material and dual-resin technology, which is applied in the field of preparation of semi-cured dual-resin system composite materials, can solve the problems of affecting combat effectiveness, poor flame retardancy, and poor anti-fragmentation performance, and achieve improved battlefield survival rate and high anti-fragmentation performance Effect

Active Publication Date: 2021-11-02
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the field of armor protection at home and abroad, traditional anti-fragmentation materials such as glass fiber cloth-epoxy resin, aramid fiber-phenolic resin, ultra-high molecular weight polyethylene fiber-polyurethane resin are mainly used, which have high surface density, low strength, Disadvantages such as poor anti-fragmentation performance and poor flame retardancy
In the harsh battlefield environment, the protection performance against various high-speed fragments is limited, which seriously affects the combat effectiveness

Method used

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  • A kind of preparation method of semi-cured double resin system composite material
  • A kind of preparation method of semi-cured double resin system composite material
  • A kind of preparation method of semi-cured double resin system composite material

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Experimental program
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Effect test

Embodiment 1

[0038] A kind of preparation method of semi-cured double resin system composite material, carry out as follows:

[0039] S1. Aramid fiber weaving:

[0040] (1), pretreatment: put the copolymerized para-aramid fiber into a sodium hydroxide solution with a mass fraction of 0.5% and soak it for 1 hour, wash it with deionized water until neutral, then put it into an acetone solution and soak it for 12 hours, remove Wash with deionized water, boil in deionized water for 15 minutes, and finally soak in a phosphoric acid solution with a mass fraction of 20%, conduct a water bath at 40°C for 1 hour, then wash until neutral, and dry at 60°C for 4 hours. The fiber strength of para-aramid fiber is 600D and the density is 1.4g / cm 3 , the tensile strength is greater than 3500MPa, the elastic modulus is greater than 110GPa, and the elongation at break is 3-4.5%;

[0041](2) Weaving: Copolymerized para-aramid fibers form warp and weft yarns that are vertically interwoven, and the weft dens...

Embodiment 2

[0052] A kind of preparation method of semi-cured double resin system composite material, carry out as follows:

[0053] S1. Aramid fiber weaving:

[0054] (1), pretreatment: put the copolymerized para-aramid fiber into a sodium hydroxide solution with a mass fraction of 0.5% and soak for 1.5 hours, wash with deionized water until neutral, and then soak in an acetone solution for 12 hours, Wash with deionized water, then boil in deionized water for 15 minutes, and finally soak in a phosphoric acid solution with a mass fraction of 20%, conduct a water bath at 40°C for 2h, then wash until neutral, dry at 60°C for 4h, the above copolymerization Type para-aramid fiber has a fiber strength of 600D and a density of 1.33g / cm 3 , the tensile strength is greater than 3800MPa, the elastic modulus is greater than 120GPa, and the elongation at break is 3-3.5%;

[0055] (2) Weaving: Copolymerized para-aramid fibers form warp and weft yarns that are vertically interwoven, and the weft den...

Embodiment 3

[0065] A kind of preparation method of semi-cured double resin system composite material, carry out as follows:

[0066] S1. Aramid fiber weaving:

[0067] (1), pretreatment: put the copolymerized para-aramid fiber into a sodium hydroxide solution with a mass fraction of 0.5% and soak it for 80 minutes, wash it with deionized water until neutral, then put it into an acetone solution and soak it for 12 hours, remove Wash with deionized water, boil in deionized water for 15 minutes, and finally soak in a phosphoric acid solution with a mass fraction of 20%, conduct a water bath at 40°C for 1.5h, then wash until neutral, and dry at 60°C for 4 hours; the above copolymerization The fiber strength of type para-aramid fiber is 1500D and the density is 1.44g / cm 3 , the tensile strength is greater than 3800MPa, the elastic modulus is greater than 120GPa, and the elongation at break is 3-3.5%;

[0068] (2) Weaving: Copolymerized para-aramid fibers form warp and weft yarns that are ver...

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Abstract

A method for preparing a semi-cured dual-resin system composite material, which sequentially includes the preparation of a fiber weaving structure, the deployment of a dual resin system, the preparation of a prepreg, and the steps of compounding, wherein the fiber weaving is composed of a heterocyclic structure The copolymerized para-aramid fiber is firstly pretreated and then braided into shape. The dual resin system is formed by mixing and dispersing polyurethane resin, thermosetting resin, curing agent and ammonium polyphosphate. The semi-cured dual-resin system composite material prepared by the method of the present invention has a small thickness, as low as 5.6 mm, high strength, and the strength can reach 445 to 456 MPa, and the modulus is high, and the elastic modulus can reach 3.68 to 3.80 GPa; it has high anti-fragmentation performance, The V50 can be increased from the traditional 500m / s to 579m / s; it has excellent flame retardant properties and an oxygen index of over 45%, which is suitable for various types of lightweight armor equipment to protect secondary fragments and improve the survival rate on the battlefield.

Description

technical field [0001] The invention relates to the technical field of bulletproof materials, in particular to a preparation method of a semi-cured double resin system composite material. Background technique [0002] In the field of armor protection, the main function of anti-fragmentation composite materials is to effectively protect the secondary fragments produced after various ammunition penetrates the armor of infantry fighting vehicles, and at the same time effectively control the flame caused by the metal jet produced by penetrating incendiary bombs and hollow-charged ammunition. and thermal effects, thereby reducing casualties, effectively protecting equipment, instruments and computers in the vehicle, and improving battlefield survivability. At present, in the field of armor protection at home and abroad, traditional anti-fragmentation materials such as glass fiber cloth-epoxy resin, aramid fiber-phenolic resin, ultra-high molecular weight polyethylene fiber-polyur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L63/00C08L61/06C08L77/10C08K13/02C08K3/32C08K5/13C08J5/24
CPCC08J5/24C08J2375/04C08J2461/06C08J2463/00C08J2477/10C08K5/13C08K13/02C08K2003/323
Inventor 吴护林孙彩云程时雨黄安畏李忠盛王征辉
Owner NO 59 RES INST OF CHINA ORDNANCE IND