Rubber and polytetrafluoroethylene bonding method

A technology of polytetrafluoroethylene and polytetrafluoroethylene film, which is applied in the bonding field of rubber and polytetrafluoroethylene, can solve the problems of affecting the service life of the product, the combination is not tight enough, and is easy to be corroded, so as to increase the service life, Good bonding effect, not easy to detach

Inactive Publication Date: 2016-01-20
SHANGHAI BEST RING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Rubber has good elasticity and high-strength extensibility, but it is not resistant to strong acids and alkalis and chemical solvents, and is easily corroded during use, which seriously affects the service life of the product
[0004] At present, a layer of polytetrafluoroethylene film is often connected on the surface of rubber structural parts in the market to prevent strong acids and alkalis and chemical solvents from contacting

Method used

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  • Rubber and polytetrafluoroethylene bonding method

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[0014] The present invention is a bonding method of rubber and polytetrafluoroethylene, comprising the following steps:

[0015] 1) Treat the one-side surface of the turned PTFE film in sodium sodium treatment solution to eliminate free ions on the surface of the PTFE film and increase the surface roughness, so that the PTFE and rubber can fully glued together;

[0016] 2) Mix the Chemlock 205 primer with toluene or xylene in a weight ratio of 1:1 to dilute the Chemlock 205 primer, and apply the sodium naphthalene treatment solution on the side of the PTFE membrane to the surface. Apply the diluted Chemlock 205 primer, and dry it in a constant temperature oven at 60°C for 30 minutes after coating;

[0017] 3) Mix Chemlock 252X topcoat with toluene or xylene in a weight ratio of 1:1 to dilute the Chemlock 252X topcoat, and apply the diluted Chemlock 205 primer on the dried Chemlock 205 For Locke 252X topcoat, after coating, dry it in an incubator at 60°C for 30 minutes or at ...

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Abstract

The invention discloses a rubber and polytetrafluoroethylene bonding method. The rubber and polytetrafluoroethylene bonding method comprises the following steps of: (1) treating the one-sided surface of a turned polytetrafluoroethylene film in a sodium naphthalene treating fluid so as to eliminate free ions on the surface of the polytetrafluoroethylene film and increase surface roughness; (2) coating the one-sided surface, treated by the sodium naphthalene treating fluid, of the polytetrafluoroethylene film with diluted Chemlok 205 base coat, and after completing coating, carrying out drying for 30 minutes in a thermostatic chamber with the temperature of 60 DEG C; (3) coating the dried Chemlok 205 base coat with diluted Chemlok 252X finishing coat, and after completing coating, carrying out drying for 30 minutes in the thermostatic chamber with the temperature of 60 DEG C or carrying out drying for 2 hours at a normal temperature; and (4) putting the polytetrafluoroethylene film treated in the step (3) in a rubber mold, and carrying out sustained pressurization for 600 seconds at the temperature of 160 DEG C+/-5 under the pressure of 16+/-1Mpa so as to enable the rubber and the polytetrafluoroethylene to be tightly bonded in a heat vulcanization process, so that the service life of rubber structural components is prolonged.

Description

technical field [0001] The invention specifically relates to a bonding method of rubber and polytetrafluoroethylene. Background technique [0002] Polytetrafluoroethylene is commonly known as the "Plastic King" in materials. It is used in pump valve diaphragms, electronic valve flat diaphragms and metering pump diaphragms. Corrosive properties of medicines, but it is not easy to bond with other materials. [0003] Rubber has good elasticity and high-strength extensibility, but it is not resistant to strong acids and alkalis and chemical solvents, and is easily corroded during use, which seriously affects the service life of the product. [0004] At present, a layer of polytetrafluoroethylene film is often attached to the surface of rubber structural parts in the market to prevent strong acids and alkalis and chemical solvents from contacting rubber structural parts, causing chemical corrosion and affecting the life of rubber structural parts. However, since the rubber stru...

Claims

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Application Information

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IPC IPC(8): B29C65/52
Inventor 宋永闯潘冲蒋诚奎
Owner SHANGHAI BEST RING TECH
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