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MIJOO C&I

PRODUCTS

•EPDM Rubber Ring

EPDM Rubber Ring Features

Advantage

01 
Excellent weather and ozone resistance  

Excellent stability, retaining initial properties for over 20 years, even when exposed to ultraviolet rays and ozone.

02
Superior heat and cold resistance

Usable in a wide temperature range, from -40 ℃ to 150 ℃, with little changes in quality, even in areas with severe weather changes such as tropical regions and extremely cold areas.

03
Excellent elongation

Elongation at over 450%, with excellent resistance to cracks and vibrations of concrete spheres, maintaining excellent construction quality.

04
Acid resistance

Highly resistant against acids such as hydrochloric and sulfuric acids.

05
Chemical resistance and durability 

Superior chemical resistance to pesticides, fertilizers, concrete, and other chemicals, and high durability against temperature and humidity.

06
Environmental-friendliness

When coming in contact with fresh water, harmful elements such as sodium and mercury do not leak out, and no harm is done to fish, algae, plants, and other forms of life. Free from rubber sheet odors and can be recycled as a thermoplastic elastomer.

07
Bonding reliability 

Free of defects in joint parts, seen in existing rubbers that crack with expansion and contract due to climate changes.

Rubber types
Natural rubber
Natural rubber
Styrene-butadiene
rubber
Butadiene rubber
Nitrile rubber
Nitrile rubber
Butyl rubber
(ASTM)
EPDM
NR
SBR
BR
CR
NBR
 IIR
Rubber Ratio
 0.86~0.87
 0.92
 0.93~0.94
 0.91~0.92
 1.15~1.25
 1.00~1.20

0.91~0.93

Physical Properties and Resistance of Compound Rubber

Shore A Hardness
40~90
 30~90
40~90
40~90
 40~90
 40~90
35~90
Tensile strength (kg/c㎠)
50~200
 70~280
 50~230
 50~230
 60~250
 50~250
50~150
Elongation(%)
 100~500
 100~600
100~500
 100~500
 100~500
 100~500
100~600
Resilience(%)
 B
 A
B
 A
A
B
C
Commercial temperature (highest) Commercial temperature (lowest)

 150
 -60~-40

70
-40
90~100
-35
90
-45
100
-30
100~200
-25
120
-40
Abrasion resistance
C
B
A
A
B
A
C
Flexural crack resistance
b
A
B
C
B
B
A
Ozone resistance
 a
D
D
D
B
D
A
Internal compression reduction ratio
b
B
B
B
B
B
C
Gas permeability
 c
C
C
C
B
B
A
Salt resistance
 d
D
D
D
B
D
D
Electric conductivity (W.cm)
 12~15
 10~15
 10~15
 14~15
 10~12
 2~10
 16~18 
Glass transition temperature
 ----
 -72
 -52
-79
 -40
 -56 -> -22

 -80

Oil and Solvent Resistance of Compounded Rubber

Lubricant
D
D
D
D
D
D
D
Gasoline
D
D
D
D
D
D
D
Aliphatic hydrocarbon
D
D
D
D
D
D
D
Aromatic hydrocarbon
D
D
D
D
D
D
D
Chlorine solvent
D
D
D
D
D
D
D
Alcohol
A
A
A
A
A
A
A
Ketone
B
B
B
B
B
B
B

Acid and Alkali Resistance of Compounded Rubber

Water
A
A
A
A
A
A
A
Diluted acid
A
B
B
B
A
B
A
Dark acid
B
D
D
D
C
D
B
Alkali
A
B
B
B
A
B
A

Main Applications

Wire sheathing, automotive sweat strips

Steam hose, conveyor belt, etc.

Automobile tires, shoes, industrial truck tires, hoses, belts, containers, springs, general and industrial goods, etc.

Automobile tires, shoes, automobile parts, rubber tarpaulins, athletic goods, belts, industrial and general rubber products

Industrial products such as automobiles, aircraft tires, shoes, anti-vibration rubber, rubber rolls, belts, and hoses

Wire sheath, conveyor belts, vibration-proof rubber, window frame rubber, adhesives, general industrial goods

Oil seals, gaskets, oil hoses, conveyor belts, printing rolls, oil resistant products such as Toproll for textiles

Tubes for automobile tires, curing bags, looping, wire sheath, window frame rubber, steam, source conveyor belts, etc.

© MIJOO C&I

Tel. +82-55-363-5953~4 , +82-51-728-3400 
Fax. +82-55-363-5955
mijoo@mijoochem.com
# 10, Naeyeon 1-gil , Yangsan-si, Gyeongsangnam-do, Korea

© MIJOO C&I

Tel. +82-55-363-5953~4 , +82-51-728-3400 | Fax. +82-55-363-5955
mijoo@mijoochem.com
# 10, Naeyeon 1-gil (Pyeongsan-dong), Yangsan-si, Gyeongsangnam-do, Korea