O-shaped rubber sealing ring has the characteristics of simple structure, low price, small size, light weight, good sealing effect, low dynamic friction resistance, etc., and is widely used in hydraulic and pneumatic systems in various machinery, playing a good sealing role. EPDM reclaimed rubber retains the basic performance characteristics of EPDM rubber, and can be used alone or in combination with EPDM rubber to produce O-rings to reduce the cost of raw materials.
1. O-shaped rubber sealing ring performance requirements
Rubber O-ring sealing ring is the use of rubber material elasticity, compression deformation and other properties to achieve sealing, the rubber material used is required to have good elasticity, compression set resistance and a certain hardness, tensile strength E4LYY1030, etc., the performance requirements of O-ring in different use occasions are different. For example, O-rings working in a static sealing environment require moderate hardness to ensure that the sealing ring has a good sealing effect and a certain degree of flexibility; O-rings working in a dynamic sealing environment require high hardness to resist friction and pressure during operation and prevent deformation and damage.
2. Basic performance characteristics of EPDM reclaimed rubber
EPDM reclaimed rubber is made of EPDM head glue, unvulcanized EPDM rubber or waste sealing strips, etc., which has excellent high and low temperature resistance, weather resistance, ozone resistance, aging resistance and other performance characteristics, which can meet the basic performance requirements of O-rings and effectively reduce the cost of raw rubber. The O-ring produced by EPDM reclaimed rubber or EPDM rubber/reclaimed rubber can be used in outdoor environments or high temperature conditions, maintain stable physical properties for a long time, and are not easy to age or degrade.
3. EPDM rubber/EPDM reclaimed rubber produces Vulcanization formula for O-shaped rubber seals
70 parts of EPDM rubber, 30 parts of EPDM reclaimed rubber, 5 parts of zinc oxide, 1 part of antioxidant RD, 42 parts of carbon black N550, 5 parts of paraffin oil, 7 parts of cumene peroxide (DCP); 160 in total.
4. EPDM recycled rubber O-shaped rubber sealing ring application
The O-shaped rubber sealing ring processed from EPDM reclaimed rubber or EPDM rubber/reclaimed rubber with rubber as the main raw material is widely used in industrial pipeline sealing (such as water pumps, valves, pipeline connections), outdoor equipment sealing (such as building waterproof systems, outdoor electrical equipment, etc.), static sealing (such as solenoid valves, pneumatic components) and other fields, with low production cost, good sealing effect and long service life.
When using EPDM reclaimed rubber to produce O-shaped rubber seals, EPDM reclaimed rubber can not only be used in combination with EPDM rubber, but also with butyl rubber, styrene-butadiene rubber or butyl reclaimed rubber, etc., to reasonably design the formula and further improve the processing technology performance, finished product shape and dimensional stability, aging resistance, etc. Xiaobian has the opportunity to continue to share with you the formula design and production process points of EPDM reclaimed rubber for the production of O-shaped rubber seals.
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