EPDM (ethylene-propylene-diene monomer) rubber sealing strip with gas tightness enhanced by graphite and butyl rubber powder

A technology of EPDM rubber and butyl rubber powder, used in the rubber field, can solve the problems of fast wear of the sealing strip, no emphasis on wear resistance, poor sealing, etc., to achieve excellent sealing performance, reduce compression permanent deformation, good wear resistance

Inactive Publication Date: 2016-10-26
HEFEI E CHON METAL PLATE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sealing strip used for the front sealing plate of the switchgear needs to be switched frequently. Due to friction, the sealing strip wears quickly, which easily leads to poor sealing.
Although the EPDM material used for the sealing strip has been modified for aging resistance in the above article, the enhancement of its wear resistance has not been emphasized. This requires the modification of the original sealing strip material to meet the existing requirements demand for switchgear

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] An EPDM sealing strip with graphite butyl rubber powder to enhance airtightness, made of the following raw materials in parts by weight (kg): EPDM 100, OMMT15, high-density polyethylene 20, molybdenum disulfide 7. PTFE powder 2, DOP3, dibenzoyl peroxide 0.2, maleic anhydride 4, sulfur powder 2.5, carbon black 12, antioxidant RD0.4, trioctyl trimellitate 4, expandable graphite 9. Butyl rubber powder 5. Stearic acid 1. Proper amount of absolute ethanol and deionized water.

[0015] Described a kind of graphite butyl rubber powder strengthens the EPDM sealing strip of airtightness, is made by following specific steps:

[0016] (1) Put high-density polyethylene, DOP, molybdenum disulfide, and polytetrafluoroethylene powder into a high-speed mixer, mix them at a speed of 1000 rpm for 6 minutes, then send them into a twin-screw extruder, add Dibenzoyl peroxide and maleic anhydride are heated to 90°C, extruded and granulated to obtain a wear-resistant and lubricated modified ...

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PUM

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Abstract

The invention discloses an EPDM (ethylene-propylene-diene monomer) rubber sealing strip with gas tightness enhanced by graphite and butyl rubber powder. The EPDM rubber sealing strip is prepared from the following raw materials in parts by weight: 100-105 parts of EPDM rubber, 15-17 parts of OMMT, 20-22 parts of high-density polyethylene, 7-9 parts of molybdenum disulfide, 2-3 parts of polytetrafluoroethylene powder, 3-4 parts of DOP, 0.2-0.22 part of dibenzoyl peroxide, 4-5 parts of maleic anhydride, 2.5-3 parts of sulfur powder, 12-14 parts of carbon black, 0.4-0.5 part of antiager RD, 4-5 parts of trioctyl trimellitate, 9-10 parts of expandable graphite, 5-6 parts of butyl rubber powder, 1-1.3 parts of stearic acid, and proper amounts of anhydrous ethanol and deionized water. The sealing strip provided by the invention has very good sealing performance, especially the gas tightness, and is applicable to a gas-tight switch cabinet, excellent in performance and long in service life.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to an EPDM sealing strip with graphite butyl rubber powder enhancing airtightness. Background technique [0002] The switchgear is a kind of equipment that provides the power needed for people's production and life. Its box body is a sealed structure composed of a front sealing plate, a side sealing plate and a rear sealing plate. However, when several switch cabinets are combined and used, there will be gaps between the spliced ​​side sealing plates. This kind of gap not only affects the overall appearance, but also easily falls into dust or water droplets, which is not enough to block electromagnetic radiation, causing unsafe factors in use. In order to prevent dust, foreign matter or moisture from entering the inside of the switchgear, resulting in performance degradation or damage to the components inside the switchgear, sealed switchgears are used more and more widely, so the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L51/06C08L27/18C08L23/22C08K13/06C08K9/00C08K7/24C08K3/30C08K3/04C08K5/12C08K3/34C08J3/22B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08J3/226C08J2323/16C08J2451/06C08K2201/011C08L23/16C08L2201/08C08L2201/14C08L2205/035C08L2207/062C08L51/06C08L27/18C08L23/22C08K13/06C08K9/00C08K7/24C08K2003/3009C08K3/04C08K5/12C08K3/346
Inventor 陆厚平
Owner HEFEI E CHON METAL PLATE TECH CO LTD
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