Return to forums
Register new account
Login:

Mclaren Power Forums: How To Improve The Performance Of EPDM Extruded Sealing Strip - Mclaren Power Forums

Jump to content

Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

How To Improve The Performance Of EPDM Extruded Sealing Strip

#1
User is online   xysoom 

  • Advanced Member
  • PipPipPip
  • Group: Members
  • Posts: 5,860
  • Joined: 21-May 20
How To Improve The Performance Of EPDM Extruded Sealing Strip



resistance. It is widely used in the production of various rubber sealing strips. When using EPDM to produce extruded sealing strips, the quality of the semi-finished rubber compound directly affects the service performance and service life of the finished sealing strip. In actual production, rubber product manufacturers need to select an appropriate mixing process according to the processing process characteristics of the EPDM compound to further improve the comprehensive performance of the EPDM extruded sealing strip.To get more news about Sealing Strip, you can visit senpinghz.com official website.

1. Select the mixing skills of the open mixer
The main chain of EPDM rubber is composed of chemically stable saturated hydrocarbons. EPDM rubber molecules after simple molding usually can not break and degrade, and roll wrapping property can not be obtained. Mooney viscosity value needs to reach a certain range.

When EPDM extruded sealing strip rubber is mixed with an open mixer, the thin pass roll distance shall be adjusted to a small roll distance of 0.2-1mm, and it shall be thin pass 5-10 times at room temperature; The temperature of the front roller 2llyy923wfm of the rubber mixture shall be controlled between 40-70 degree , and the temperature of the rear roller shall be controlled between 50-80 degree ; Select the dropping method for oil filling; When mixing ethylene propylene diene rubber with high Mooney or diene content, the mixing temperature can be appropriately increased and the mixing time can be appropriately prolonged.

2. Selection of mixing skills of internal mixer

EPDM has the characteristics of high-temperature thermoplastic. When it is mixed at high temperature, the complex and oil agent is easy to disperse and the mixing uniformity is good; Compared with the open mixer, EPDM mixed by an internal mixer can obtain a good mixing effect in high temperature and short time.

Generally, when extruding the sealing strip of EPDM with high Mooney viscosity, an internal mixer is selected for mixing. The mixing temperature of the EPDM sealant strip during mixing is higher than that of other rubber, which can be controlled at about 160 degree , and a good mixing effect can be obtained after mixing for 4-5min. The extruded rubber is mostly mixed in two stages. After the EPDM, filler, reinforcing agent and softener are evenly mixed, the vulcanization system is added in the second stage.

In order to reduce production costs and improve economic benefits, many rubber product manufacturers choose to use an appropriate amount of EPDM reclaimed rubber in EPDM sealing strips. The processing performance of EPDM reclaimed rubber is different from that of EPDM raw rubber, and the plasticity is higher. Generally, EPDM is fully plasticized and then mixed with reclaimed rubber, and an internal mixer is often selected for the mixing process. In order to precipitate the excess gas in the rubber mixture and mix the compounding agent fully and evenly, the rubber mixture needs to be parked and cooled. The extruded rubber has good stiffness and compactness, so as to ensure the smooth extrusion vulcanization of the extruded sealing strip and the sealing strip is not easy to deform
0

Share this topic:


Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

1 User(s) are reading this topic
0 members, 1 guests, 0 anonymous users