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Ethylene propylene diene porous elastic composite sealing gasket and manufacturing method thereof

A technology of composite gasket and EPDM, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of water leakage and other problems, and achieve the effect of long service life, not easy to evaporate, and good resilience

Inactive Publication Date: 2009-10-21
上海长宁橡胶制品厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is a significant defect in the shield segment gasket made of the above-mentioned materials. Although it has a sealing and water-stop effect in water, in the process of segment construction, once the segments are assembled and dislocated, local leakage will occur. Water phenomenon, so need to improve

Method used

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  • Ethylene propylene diene porous elastic composite sealing gasket and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] preparation figure 1 The EPDM porous elastic composite gasket shown.

[0031] There are 6 small holes, 4 with a diameter of 4mm, and 2 with a diameter of 4.6mm, and the opening rate is 4.68%;

[0032] The main body of the gasket includes the following components in parts by weight:

[0033] EPDM rubber 100 parts

[0034] Vulcanization activator 3 parts

[0035] Anti-aging agent 1 part

[0036] Carbon black 90 parts

[0037] 70 parts paraffin oil

[0038] Accelerator 7 parts

[0039] Water absorbent 15 parts

[0040] 1 part vulcanizing agent.

[0041] The vulcanization active agent is zinc oxide;

[0042] The anti-aging agent is 2-mercaptobenzimidazole;

[0043] Accelerator is zinc diethyldithiocarbamate;

[0044] The water absorbing agent is calcium oxide;

[0045] The vulcanizing agent is sulfur;

[0046] The water-swellable bar comprises the following components in parts by weight:

[0047] Neoprene 100 parts

[0048] Vulcanization activator 3 parts

...

Embodiment 2

[0087] preparation figure 1 The EPDM porous elastic composite gasket shown.

[0088] There are 6 small holes, 4 with a diameter of 4mm, and 2 with a diameter of 4.6mm, and the opening rate is 4.68%;

[0089] The main body of the gasket includes the following components in parts by weight:

[0090] EPDM rubber 100 parts

[0091] Vulcanization activator 10 parts

[0092] Anti-aging agent 4 parts

[0093] Carbon black 120 parts

[0094] 50 parts paraffin oil

[0095] Accelerator 8 parts

[0096] Water absorbent 11 parts

[0097] Vulcanizing agent 2 parts.

[0098] The vulcanization active agent is stearic acid;

[0099] The anti-aging agent is 2,2,4-trimethyl-1,2-dihydroquinoline polymer (dendritic);

[0100] Accelerator is zinc dibutyldithiocarbamate;

[0101] The water absorbing agent is calcium oxide;

[0102] The vulcanizing agent is sulfur;

[0103] The water-swellable bar comprises the following components in parts by weight:

[0104] Neoprene 100 parts

[01...

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Abstract

The invention provides an ethylene propylene diene porous elastic composite sealing gasket and a manufacturing method thereof. The ethylene propylene diene porous elastic composite sealing gasket comprises a stripped sealing gasket main body on which pores are arranged and a water expansion strip embedded at the top end of the sealing gasket main body, wherein the water expansion strip comprises the following components according to the part by weight: 100 of neoprene rubber, 3-5 of vulcanizing activator, 2-4 of age inhibitor, 20-25 of white carbon black, 120-150 of water absorber and 5-6 of zinc oxide. The manufactured ethylene propylene diene porous elastic composite sealing gasket adopts raw materials having no poison, harm and pollution and having long service life of products. The service life predictive period is forcedly tested by the state-level detection department, and the service life of a tunnel assembled lining rubber sealing gasket can satisfy the requirement of over 100 years, thereby the invention can be widely applied to cross-river tunnels, magnetic suspension train tunnels and subways.

Description

technical field [0001] The invention relates to a sealing gasket, in particular to an elastic sealing gasket used for a shield segment. Background technique [0002] The gasket used for the shield segment needs to be durable, environmentally friendly and adaptable to the subway. The shield segment gasket used for the subway and tunnel usually uses a single porous EPDM rubber The elastic gasket is used to seal the water-stop of the concrete prefabricated shield segment joints, and is currently the mainstream material used for the seal and water-stop of the assembled tunnel segments. [0003] However, there is a significant defect in the shield segment gasket made of the above-mentioned materials. Although it has a sealing and water-stop effect in water, in the process of segment construction, once the segments are assembled and dislocated, local leakage will occur. Water phenomenon, so needs improvement. Contents of the invention [0004] The object of the present inventi...

Claims

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Application Information

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IPC IPC(8): F16J15/10
Inventor 金祥生崔云薛伟民彭惠琪朱秋宝宣玉英
Owner 上海长宁橡胶制品厂有限公司
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