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Manufacturing process of polytetrafluoroethylene composite elastic body shim and product thereof

A polytetrafluoroethylene, production process technology, applied in other household appliances, household components, applications, etc., can solve the problems of insufficient overall use effect, poor elasticity and strength, poor sealing performance, etc., to reduce blowout resistance. , High sealing specific pressure, reducing the effect of gasket cold flow

Active Publication Date: 2007-08-08
浙江国泰萧星密封材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polytetrafluoroethylene composite elastomer gasket production process and its products, which mainly solve the problem that the gasket in the prior art is made of a single polytetrafluoroethylene, and its elasticity and strength are relatively poor. ; If rubber is added, the two materials are not bonded together, so the overall use effect is not enough to meet the problems of higher pressure and harsher working conditions; the invention also solves the problem that the surface of the existing gasket is smooth, Technical problems such as poor sealing performance

Method used

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  • Manufacturing process of polytetrafluoroethylene composite elastic body shim and product thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the step of the production technology of polytetrafluoroethylene composite elastomer gasket of the present invention is:

[0027] a. Preparation of mixed rubber. The composition and mass percentage of mixed rubber are: 70% of fluorine rubber, 1.7% of vulcanizing agent, 13.7% of acid absorbing agent, 13.7% of reinforcing agent, and the rest are operating aids;

[0028] b. Pre-press molding under the conditions of temperature 80-90℃ and pressure 15-30Mpa;

[0029] c. Process the PTFE gasket through machine tool cutting, and process the water line 3;

[0030] d, polytetrafluoroethylene and rubber bonding parts are surface-activated with naphthalene sodium treatment agent, naphthalene sodium treatment agent is: naphthalene and sodium are dissolved in a sufficient amount of tetrahydrofuran solution, and the molar ratio of naphthalene to sodium is 1:1;

[0031] e. Apply adhesive to bond the rubber gasket 1 to the PTFE shell 2;

[0032] f. Vulcanization molding...

Embodiment 2

[0037] Embodiment 2: the step of the production technology of polytetrafluoroethylene composite elastomer gasket of the present invention is:

[0038] a. Preparation of mixed rubber. The composition and mass percentage of mixed rubber are: 60% of fluorine rubber, 3% of vulcanizing agent, 15% of acid absorbing agent, 15% of reinforcing agent, and the rest are operating aids;

[0039] b. Pre-press molding under the conditions of temperature 80-90℃ and pressure 15-30Mpa;

[0040] c. Process the PTFE gasket through machine tool cutting, and process the water line 3;

[0041] d, polytetrafluoroethylene and rubber bonding parts are surface-activated with naphthalene sodium treatment agent, naphthalene sodium treatment agent is: naphthalene and sodium are dissolved in a sufficient amount of tetrahydrofuran solution, and the molar ratio of naphthalene to sodium is 1:1;

[0042] e. Apply adhesive to bond the rubber gasket 1 to the PTFE shell 2;

[0043] f. Vulcanization molding under...

Embodiment 3

[0048] Embodiment 3: the step of the production technology of polytetrafluoroethylene composite elastomer gasket of the present invention is:

[0049] a. Preparation of mixed rubber. The composition and mass percentage of mixed rubber are: 50% of fluorine rubber, 1.5% of vulcanizing agent, 10% of acid absorbing agent, 10% of reinforcing agent, and the rest are operating aids;

[0050] b. Pre-press molding under the conditions of temperature 80-90℃ and pressure 15-30Mpa;

[0051]c. Process the PTFE gasket through machine tool cutting, and process the water line 3;

[0052] d, polytetrafluoroethylene and rubber bonding parts are surface-activated with naphthalene sodium treatment agent, naphthalene sodium treatment agent is: naphthalene and sodium are dissolved in a sufficient amount of tetrahydrofuran solution, and the molar ratio of naphthalene to sodium is 1:1;

[0053] e. Apply adhesive to bond the rubber gasket 1 to the PTFE shell 2;

[0054] f. Vulcanization molding unde...

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Abstract

The invention relates to the production of politef multiple elastic cushion, which mainly solves the issues of poor elasticity and strength of the politef production, with smooth surface and good sealing performance. It uses glue smelting, pre compression forming, machining the politef cushion using lathe machine tools, overall surface activation, applying sticking glue, sticking the rubber cushion and the politef shell, sulfur forming, and trimming to get the final product. The cushion comprises rubber cushion coated with politef shell with several protruding waterlines.

Description

technical field [0001] The invention relates to a sealing gasket and a production process, in particular to a polytetrafluoroethylene composite elastomer gasket production process and its products. Background technique [0002] Pipelines, valves, containers and other equipment in the international industry are mostly sealed with a single fluoroplastic (such as polytetrafluoroethylene, polyfluoroethylene propylene), asbestos rubber sheet or silicone rubber as the gasket and gasket made of sealing materials. washer. Gaskets and washers made of asbestos rubber sheets and silicone rubber materials have low strength and are prone to aging. A Chinese patent discloses a method for improving the creep resistance of polytetrafluoroethylene sealing gaskets and the sealing gaskets thereof (publication number: CN 1648189A), which is the first to manufacture polytetrafluoroethylene sheets with better creep resistance material, and then use this sheet to make sealing gaskets, firstly ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D31/00C08J3/20B29C43/58F16J15/00B29K27/18B29K21/00B29D99/00
Inventor 孙锦龙
Owner 浙江国泰萧星密封材料股份有限公司
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