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Method for improving adhesive property by processing chemigum through low temperature plasma using argon gas as medium

A technology of low-temperature plasma and nitrile rubber, which is applied in the field of improving bonding performance, and can solve problems such as poor resistance to polar media

Inactive Publication Date: 2015-10-21
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nitrile rubber is a random copolymer polymer material made of butadiene and acrylonitrile monomers by free radical-induced emulsion polymerization. It is used as a special rubber for sealing in high-temperature environments. Although it is an excellent oil-resistant seal material, but poor resistance to polar media

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Put the nitrile rubber to be bonded into the processing box of the low-temperature plasma equipment, and evacuate until the vacuum degree is less than 5 Pa;

[0013] (2) Introduce argon gas with a purity of 99.9%, and adjust the vacuum to 30 Pa;

[0014] (3) Apply current and voltage to make argon gas low-temperature plasma, and treat nitrile rubber with a processing power of 70 watts and a processing time of 10 minutes;

[0015] (4) Within 5 hours after treatment, use Chemlok CH205 adhesive to bond the treated nitrile rubber and PTFE, and vulcanize at 140~150 ℃ for 30 minutes;

[0016] (5) The bonding strength between the nitrile rubber and the polytetrafluoroethylene film is 520 N / m.

Embodiment 2

[0018] (1) Put the nitrile rubber to be bonded into the processing box of the low-temperature plasma equipment, and evacuate to a vacuum degree of 4.5 Pa;

[0019] (2) Introduce argon gas with a purity of 99.9%, and adjust the vacuum to 35 Pa;

[0020] (3) Apply current and voltage to make argon gas low-temperature plasma, and treat nitrile rubber with a processing power of 110 watts and a processing time of 4 minutes;

[0021] (4) Within 5 hours after treatment, use Chemlok CH205 adhesive to bond the treated nitrile rubber and PTFE, and vulcanize at 140~150 ℃ for 30 minutes;

[0022] (5) The bonding strength between nitrile rubber and polytetrafluoroethylene is 510 N / m.

Embodiment 3

[0024] (1) Put the nitrile rubber to be bonded into the processing box of the low-temperature plasma equipment, and evacuate until the vacuum degree is less than 5 Pa;

[0025] (2) Introduce argon gas with a purity greater than 99.9%, and adjust the vacuum to 40 Pa;

[0026] (3) Apply current and voltage to make argon gas low-temperature plasma, and treat the nitrile rubber with a processing power of 90 watts and a processing time of 6 minutes;

[0027] (4) Within 5 hours after treatment, use Chemlok CH205 adhesive to bond the treated nitrile rubber and PTFE, and vulcanize at 140~150 ℃ for 30 minutes;

[0028] (5) The bonding strength between nitrile rubber and polytetrafluoroethylene is 510 N / m.

[0029] Note: The test standard of adhesive performance

[0030] GB / T 2791-1995 "Test method for T-peel strength of adhesives - flexible material to flexible material".

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Abstract

The invention discloses a method for improving an adhesive property by processing chemigum through a low temperature plasma using argon gas as a medium. The method comprises the steps of: (1) processing the chemigum by using the low temperature plasma in the argon gas medium of which the degree of vacuum is 30-40 pascals; (2) enabling the processing power to be 70-110 watts and the time to be 3-10 minutes; and (3) within 5 hours after processing, using a chemnitz Locke glue adhesion agent (CH205) for adhering the chemigum and polytetrafluoroethylene, and performing vulcanization for 30 minutes at 140-150 DEGC. According to the method disclosed by the invention, the adhesion strength between the chemigum and the polytetrafluoroethylene is improved to at least 500 newtons per metre from 0; the processing method does not generate an influence on the physical mechanical performance of the chemigum.

Description

technical field [0001] The invention relates to a surface treatment method for nitrile rubber, in particular to a method for improving the bonding performance after using argon gas as a treatment medium and treating the nitrile rubber with low-temperature plasma. Background technique [0002] Nitrile rubber is a random copolymer polymer material made of butadiene and acrylonitrile monomers by free radical-induced emulsion polymerization. It is used as a special rubber for sealing in high-temperature environments. Although it is an excellent oil-resistant seal material, but poor resistance to polar media. In order to further improve the resistance to polar media, a layer of polytetrafluoroethylene film with a thickness of 0.1-0.5 mm can be coated on its surface. [0003] This technology enables nitrile rubber to have the ability to bond with polytetrafluoroethylene. Contents of the invention [0004] The invention provides a method for treating nitrile rubber with argon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00C08J5/12C08L9/02
Inventor 孟江燕孙旭王云英陈玉如
Owner NANCHANG HANGKONG UNIVERSITY
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