Preparation method of fatigue-resistant and irradiation-resistant diaphragm sizing material

A fatigue-resistant and radiation-resistant technology, which is applied in the field of preparation of fatigue-resistant radiation diaphragm rubber compound, can solve the problems of diaphragm leakage, stack jumping, and the influence of stable operation of nuclear power plants, and achieve excellent fatigue resistance performance and elongation at break. The effect of reducing and improving radiation resistance

Inactive Publication Date: 2018-08-03
JIANGSU SHENTONG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the diaphragm of the pneumatic control valve in the nuclear power industry often has leakage problems due to diaphragm fatigue tearing and radiation aging during use, which affects the stable operation of nuclear power plants, and in severe cases, stack jumping will occur

Method used

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  • Preparation method of fatigue-resistant and irradiation-resistant diaphragm sizing material

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Embodiment 1

[0025] A method for preparing a fatigue-resistant and radiation-resistant diaphragm compound, the specific steps are as follows:

[0026] (1) Masticating: Masticate 70 parts of EPDM rubber and 30 parts of nitrile rubber on an open mill, adjust the roller distance to 1.5-4mm, control the roller temperature at 40-50°C, and masticate for 15 minutes to make mastication glue.

[0027] (2) Mixing: Mixing adopts two-stage mixing process. In the first stage of mixing, first put the plasticized rubber into the internal mixer to press the top bolt, mix for 1 minute, then open the top bolt, and add carbon black N330 55 parts of white carbon black, 5 parts of zinc oxide, 2 parts of stearic acid, 12 parts of dioctyl phthalate, 1.5 parts of anti-aging agent RD, 1 part of anti-aging agent 4020, 1 part of anti-aging agent MB, four 25 parts of trilead oxide, 5 parts of cerium oxide, 2.5 parts of binder RS ​​and 3 parts of carbon nanotubes, kneading for 4 minutes, controlling the debinding tem...

Embodiment 2

[0029] A method for preparing a fatigue-resistant and radiation-resistant diaphragm compound, the specific steps are as follows:

[0030] (1) Mastication: Masticate 40 parts of EPDM rubber and 60 parts of nitrile rubber on an open mill, adjust the roller distance to 1.5-4mm, control the roller temperature at 40-50°C, and masticate for 10 minutes to make mastication glue.

[0031] (2) Mixing: Mixing adopts a two-stage mixing process. In the first stage of mixing, first put the plasticized rubber into the internal mixer, press the top bolt, and mix for 0.5 minutes, then open the top bolt and add charcoal 25 parts of black N550, 20 parts of carbon black N770, 8 parts of white carbon black, 5 parts of zinc oxide, 3 parts of stearic acid, 8 parts of paraffin oil, 5 parts of liquid butadiene, 1 part of anti-aging agent RD, anti-aging agent 4020 1 part in total, 1 part of anti-aging agent BLE, 1 part of microcrystalline wax, 40 parts of trilead tetraoxide, 2.5 parts of boron carbide...

Embodiment 3

[0033] A method for preparing a fatigue-resistant and radiation-resistant diaphragm compound, the specific steps are as follows:

[0034] (1) Masticating: Masticate 100 parts of EPDM rubber on an open mill, adjust the roller distance to 1.5-4mm, control the roller temperature at 40-50°C, and masticate for 12 minutes to make plasticized rubber.

[0035] (2) Mixing: Mixing adopts two-stage mixing process. In the first stage of mixing, put the plasticized rubber into the internal mixer, press the top bolt, and mix for 1.5 minutes, then open the top bolt and add charcoal 30 parts each of black N330 and carbon black N990, 5 parts of white carbon black, 8 parts of zinc oxide, 3 parts of stearic acid, 18 parts of paraffin oil, 1 part of anti-aging agent RD, 1 part of anti-aging agent BLE, 1 part of anti-aging agent MC, cerium oxide 5 parts, 3 parts of dysprosium oxide, 2.5 parts of boron nitride, 2.8 parts of binder RS ​​and 5 parts of carbon nanotubes, banburying for 4 minutes, cont...

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Abstract

The invention discloses a preparation method of a fatigue-resistant and irradiation-resistant diaphragm sizing material. EPDM (ethylene-propylene-diene monomer) rubber, NBR (nitrile-butadiene rubber),a reinforcing filling agent, a vulcanizing agent, a vulcanization accelerator, an activator, a plasticizer, an anti-aging agent, an anti-irradiation aid, a binder and an anti-fatigue agent are plasticized and mixed. The prepared diaphragm sizing material has excellent fatigue resistance and has the flexure times up to 250,000 times or above. The tensile strength, elongation at break and hardnesschange rate are substantially reduced after 935 KGy irradiation, the irradiation resistance of the diaphragm sizing material is improved, and the sizing material can be used for producing various irradiation-resistant rubber products and widely applied to environments with high-energy radiation in the fields of aerospace, nuclear industry, electronic communication, chemical engineering, medicine,ships and the like and has very good social benefits and economic benefits.

Description

Technical field [0001] The invention relates to a preparation process of a novel rubber material, in particular to a preparation method of a fatigue-resistant radiation membrane rubber material. Background technique [0002] In recent years, the rapid development of China's economy has promoted the rapid growth of the nuclear power industry, and the number of operating units in nuclear power plants has continued to increase. Pneumatic regulating valve is an important nuclear power valve, and the diaphragm is a key component that determines the life of the regulating valve. [0003] At present, during the use of the pneumatic control valve diaphragm in the nuclear power industry, leakage problems often occur due to diaphragm fatigue tearing and radiation aging, which affects the stable operation of nuclear power plants, and in severe cases, stack jumping will occur. Contents of the invention [0004] The purpose of the present invention is to overcome the deficiencies in t...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L9/02C08L91/06C08K13/02C08K3/04C08K3/36C08K5/09C08K5/12
CPCC08L23/16C08L9/02C08L2201/08C08K13/02C08K3/04C08K3/36C08K5/09C08K5/12C08L91/06
Inventor 徐春安万美含
Owner JIANGSU SHENTONG VALVE
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