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Enzymatic hydrolysis lignin and silicon dioxide composite reinforced weather-resistant sealing rubber strip for switch cabinet

A technology for enzymatic hydrolysis of lignin and silica, applied in the field of sealing strips for switch cabinets, can solve the problems of lack of wear resistance, rapid wear of sealing strips, poor sealing, etc., to reduce permanent deformation of compression, good resistance Excellent grinding and sealing performance

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] A sealant strip for switch cabinets with enzymatic lignin silica composite enhanced weather resistance, made of the following raw materials in parts by weight (kg): EPDM 100, OMMT15, high-density polyethylene 20, disulfide Molybdenum 7, PTFE powder 2, DOP3, dibenzoyl peroxide 0.2, maleic anhydride 4, sulfur powder 2.5, carbon black 12, trilead tetraoxide 2, antioxidant MB0.8, nano silicon dioxide 3 , Enzymatic lignin 9, acetone 12, appropriate amount of deionized water, appropriate amount of absolute ethanol.

[0015] The enzymatically hydrolyzed lignin-silica composite-enhanced weather-resistant sealant strip for switch cabinets is made by the 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 granul...

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PUM

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Abstract

The invention discloses an enzymatic hydrolysis lignin and silicon dioxide composite reinforced weather-resistant sealing rubber strip for a switch cabinet. The sealing rubber strip is prepared from the following raw materials in parts by weight: 100 to 105 parts of an ethylene propylene terpolymer, 15 to 17 parts of OMMT, 20 to 22 parts of high density polyethylene, 7 to 9 parts of molybdenum disulfide, 2 to 3 parts of polytetrafluoroethylene powder, 3 to 4 parts of DOP, 0.2 to 0.22 part of dibenzoyl peroxide, 4 to 5 parts of maleic anhydride, 2.5 to 3 parts of sulfur powder, 12 to 14 parts of carbon black, 2 to 3 parts of lead tetraoxide, 0.8 to 1 part of an antiaging agent MB, 3 to 4 parts of nanometer silicon dioxide, 9 to 10 parts of enzymatic hydrolysis lignin, 12 to 14 parts of acetone, a proper amount of de-ionized water and a proper amount of absolute ethyl alcohol. The prepared sealing rubber strip is used for the switch cabinet, and is high in waterproof and heatproof performance, weather resistance and aging resistance, firm and durable.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a sealing strip for a switchgear with enzymatically hydrolyzed lignin-silica composite enhanced weather resistance. 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...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L51/06C08L27/18C08L97/00C08K13/02C08K3/36C08K3/06C08K3/04C08K3/30C08F255/02C08F222/06B29C35/02
CPCB29C35/02C08F255/02C08K2201/011C08L23/16C08L2201/08C08L2201/14C08L2205/035C08L51/06C08L27/18C08L97/005C08K13/02C08K3/36C08K3/06C08K3/04C08K2003/3009C08F222/06
Inventor 陆厚平
Owner HEFEI E CHON METAL PLATE TECH CO LTD
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