Method for bonding carbon fiber/phenolic-nitrile rubber materials

A technology of nitrile rubber and carbon fiber, which is applied in the direction of surface pretreatment bonding method, adhesive heating bonding method, bonding method, etc., and can solve interlayer air trapping, debonding, and different material properties, etc. problem, achieve the effect of improving bonding strength, eliminating thermal stress, and avoiding interface debonding

Active Publication Date: 2015-08-26
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of structure has many interfaces and different material properties, so it is very difficult to connect effectively.
At the same time, the carbon fiber / phenolic-nitrile rubber material contains a small amount of water and solvent, and its phenolic component will produce a certain amount of small molecule gas when it is cured, and the solvent used for cleaning and adhesives will remain, resulting in debonding, layering, etc. Quality problems such as air inclusions, especially when the thickness is large, the problem is particularly serious

Method used

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  • Method for bonding carbon fiber/phenolic-nitrile rubber materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] For a solid rocket motor, EPDM insulation material (bottom layer) is 3mm thick, carbon fiber / phenolic-nitrile rubber material is 6mm thick, and EPDM insulation material (surface layer) is 4mm thick;

[0032] 1) Preparatory steps: According to the structural size requirements of the engine heat insulation layer, the EPDM heat insulation material is rolled and formed, and the carbon fiber / phenolic-nitrile rubber material is cut into shape;

[0033] 2) Brushing steps: clean the carbon fiber / phenolic-nitrile rubber material with chemically pure ethyl acetate, and let it dry for 1 hour; brush CH238 glue, the thickness of the adhesive film is controlled at 5 μm, and let it stand for 1 hour; EPDM material The thermal insulation material (bottom layer) is cleaned with chemically pure ethyl acetate, and left to air for 1 hour; brush CH238 glue, and the thickness of the adhesive film is controlled at 5 μm, and aired for 1 hour;

[0034] 3) Prefabrication steps: paste the carbon f...

Embodiment 2

[0049] For a solid rocket motor, EPDM insulation material (bottom layer) is 2mm thick, carbon fiber / phenolic-nitrile rubber material is 4mm thick, and EPDM insulation material (surface layer) is 4mm thick;

[0050] 1) Preparatory steps: According to the structural size requirements of the engine heat insulation layer, the EPDM heat insulation material is rolled and formed, and the carbon fiber / phenolic-nitrile rubber material is cut into shape;

[0051] 2) Brushing steps: clean the carbon fiber / phenolic-nitrile rubber material with chemically pure ethyl acetate, and let it dry for 1 hour; brush CH238 glue, the thickness of the adhesive film is controlled at 10 μm, and let it stand for 2 hours; EPDM material The thermal insulation material (bottom layer) is cleaned with chemically pure ethyl acetate, and left to air for 1 hour; brush CH238 glue, the thickness of the adhesive film is controlled at 10 μm, and aired for 2 hours;

[0052] 3) Prefabrication step: Paste the carbon fi...

Embodiment 3

[0067] For a solid rocket motor, EPDM insulation material (bottom layer) is 3mm thick, carbon fiber / phenolic-nitrile rubber material is 2mm thick, and EPDM insulation material (surface layer) is 4mm thick;

[0068] 1) Preparatory steps: According to the structural size requirements of the engine heat insulation layer, the EPDM heat insulation material is rolled and formed, and the carbon fiber / phenolic-nitrile rubber material is cut into shape;

[0069] 2) Brushing steps: clean the carbon fiber / phenolic-nitrile rubber material with chemically pure ethyl acetate, and let it dry for 1 hour; brush CH238 glue, the thickness of the adhesive film is controlled at 10 μm, and let it stand for 2 hours; EPDM material The thermal insulation material (bottom layer) is cleaned with chemically pure ethyl acetate, and left to air for 1 hour; brush CH238 glue, the thickness of the adhesive film is controlled at 10 μm, and aired for 2 hours;

[0070] 3) Prefabrication step: Paste the carbon fi...

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Abstract

The invention discloses a method for bonding carbon fiber / phenolic-nitrile rubber materials, and belongs to the field of the manufacturing of a solid rocket engine insulator, and aims at solving the bonding problems of an engine housing, a first EPDM insulation material, a carbon fiber / phenolic-nitrile rubber materials and a second EPDM insulation material and improving the structural reliability. The method mainly comprises the steps of preparation, coating, prefabrication, cleaning, glue coating, setting, thermal pre-pressing, flaw detection, curing and the like. The structural integrity of the engine housing, a first EPDM insulation material, the carbon fiber / phenolic-nitrile rubber materials and the second EPDM insulation material are ensured by using a secondary bonding method, a secondary curing mode, a prefabrication forming method, a stepped temperature rising / dropping mode and other methods; the method has no de-bonding, air-entraining air hole and other quality problems, completely can meet the design requirements, and ensures the safety and reliability of a system.

Description

technical field [0001] The invention belongs to a method for manufacturing a thermal insulation layer of a solid rocket motor, in particular to a bonding method of carbon fiber / phenolic-acrylonitrile-butadiene rubber material. Background technique [0002] Carbon fiber / phenolic-nitrile rubber material is a composite material obtained by impregnating nitrile rubber and carbon fiber with phenolic resin. It has excellent thermal insulation properties and broad application prospects. The material has high hardness, low elongation, and is not easy to release stress. Therefore, during the engine research and development process, the engine casing, EPDM insulation material (bottom layer) / carbon fiber / phenolic-nitrile rubber material / EPB The structural mode of the acrylic insulation material (surface layer) adopts chemical bonding to complete the effective connection between materials, and releases the stress by using EPDM rubber as the matrix with high elasticity of the insul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J5/06C09J5/04C09J5/02C09J5/00
Inventor 崔瑞禧吕春祥朱稼麟杨禹宋考生张颖新邓安华陈丽萍王凯刘后浪
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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