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Method for strengthening bonding strength of carbon fiber/phenolic-nitrile rubber material

A technology of nitrile rubber and bonding strength, applied in the direction of adhesive heating bonding method, bonding method, surface pretreatment bonding method, etc., can solve the impact of product production schedule and quality cost, interlayer adhesion Solve problems such as poor quality and product repairs, and achieve the effects of product production cycle guarantee, elimination of repairs, and reduction of quality costs

Inactive Publication Date: 2015-08-19
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results of radiographic inspection show that the quality of interlayer bonding is poor, and in severe cases, local bulges are formed, resulting in product repair, rework or scrap, and the production schedule and quality cost of the product are seriously affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The design thickness of a carbon fiber / phenolic-nitrile rubber material is 6mm, and the materials of three specifications with thicknesses of 1mm, 2mm and 3mm are bonded and combined;

[0023] It mainly includes the following steps:

[0024] 1) Glue brushing step: clean the composite material with ethyl acetate, let it dry for 2 hours, then apply the adhesive evenly on the bonding surface of the composite material, the thickness of the adhesive film is 5 μm, and let it dry for 2 hours;

[0025] 2) Pasting step: put the composite material in the vacuum chamber, vacuumize, the vacuum degree is less than -0.096MPa, keep the pressure for 0.5h, and then, butt the composite materials together;

[0026] 3) Pre-pressing step: put the pasted composite material into the heating device, the heating temperature is 85°C, pressurize with airbag, the pressure is 0.8MPa, the heating and pressurizing time are both 0.5h, and the temperature and pressure are lowered to normal temperature ...

Embodiment 2

[0030] The design thickness of a carbon fiber / phenolic-nitrile rubber material is 6mm, and the materials of two specifications with a thickness of 2mm and 4mm are bonded together;

[0031] 1) Glue brushing step: clean the composite material with ethyl acetate, let it dry for 3 hours, then apply the adhesive evenly on the bonding surface of the composite material, the thickness of the adhesive film is 10 μm, let it dry for 3 hours;

[0032] 2) Sticking step: butt joint the composite materials together;

[0033] 3) Pre-pressing step: put the pasted composite material into the heating device, the heating temperature is 95°C, pressurize with a silicon rubber airbag, the pressure is 1.0MPa, the heating and pressurizing time are both 1h, and the temperature is lowered to room temperature Atmospheric pressure, and then reheating and pressurizing preloading, a total of 3 times of preloading;

[0034] 4) Curing step: Put the composite material into the heating device again, the heatin...

Embodiment 3

[0037] The design thickness of a carbon fiber / phenolic-nitrile rubber material is 6mm, and the materials of two specifications with a thickness of 2mm and 4mm are bonded together;

[0038] 1) Glue brushing step: Clean the composite material with chemically pure ethyl acetate, and the blowing time is 1.5h. Then, evenly brush the adhesive on the bonding surface of the composite material. 1.5h;

[0039] 2) Pasting step: put the composite material in the vacuum chamber, vacuumize, the vacuum degree is less than -0.096MPa, keep the pressure for 0.5h, and the composite materials are butted and bonded together;

[0040] 3) Pre-pressing step: put the pasted composite material into the heating device, the heating temperature is 95°C, pressurize with a silicon rubber airbag, the pressure is 1.0MPa, the heating and pressurizing time are both 1h, and the temperature is lowered to room temperature Atmospheric pressure, and then reheating and pressurizing preloading, a total of 3 times of ...

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Abstract

The invention discloses a method for strengthening the bonding strength of a carbon fiber / phenolic-nitrile rubber material. Layers of the material are bonded by the steps of brush coating, bonding, pre-pressing and curing, a fractional thermal pre-pressing process is adopted for a bonding process, and the number of the layers which are thermally pre-pressed every time is controlled to be within 3, so that the pressure loss of pressure of an airbag in a transmission process can be reduced; by the use of an airbag product employing a soft silicone rubber material, the pressurization efficiency of the airbag can be improved. Moreover, small molecules of a solvent, air and the like in a carbon fiber material and between the layers can be removed by vacuumizing, so that the aim of ensuring the interlayer bonding quality of the product is fulfilled.

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 method for improving the bonding strength of carbon fiber / phenolic-acrylonitrile-butadiene rubber materials. Background technique [0002] Carbon fiber / phenolic-nitrile rubber material is used as the anti-scouring layer material in the thermal insulation layer of solid rocket motors. Due to the skeleton structure formed by continuous weaving of carbon fibers, it has excellent resistance to high-temperature particle erosion. Due to the characteristics of the carbon fiber weaving process, there are currently only four thickness specifications of 1mm, 2mm, 3mm, and 4mm. Generally, the thickness of the anti-scour layer of the engine is 1mm~18mm. Therefore, a multi-layer bonding method is adopted to achieve the set thickness of. The results of radiographic testing show that the quality of interlayer bonding is poor, and in severe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J5/06C09J5/02C09J5/00
Inventor 崔瑞禧朱稼麟吕春祥杨禹宋考生周芬张颖新王平施宏俊舒凯凯曾庆江
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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