Rubber Materials Table

Materials
Characteristics		 Natural Rubber
NR		 Styrence Butadiene
SBR		 Nitrile Butadiene
NBR		 Ethylene Propyle
 Terpolymer
EPDM		 Chloroprene
Neoprene CR		 Silicone 
MQ.
PMQ		 Fluoro-Carbon
Viton
1.Specific Gravity 0.92 0.93 ~ 0.94 1.00 ~ 1.20 0.86 ~ 0.87 1.15 ~ 1.25 0.9 ~ 0.98 1.85
2.Mooney, Mli+4(100℃) 90 ~ 150 30 ~ 60 30 ~ 100 50 ~ 150 45 ~ 120    
3.Hardness, Shore A 30 ~ 90 40 ~ 90 40 ~ 90 30 ~ 90 30 ~ 90 30 ~ 85 60 ~ 95
4.Tensile Strength (Psi) 4000 3500 4000 3000 4000 1200 2000
5.Elongation(%) 700 600 600 600 600 700 400
6.Compression Set ● ● ○ ~ ● ○ ~ ● ○ ~ ● △ ~ ● ○ ~ ●
7.Tear Resistance ● △ ○ △ △ ~ ○ △ △
8.Abrasion Resistance ● ● ● ○ ● △ ○
9.Resilience ● ○ ○ ○ ● △ ~ ● ○ ~ ●
10.Brittle Point (℃) -50 ~ -70 -30 ~ -60 -20 ~ -50 -40 ~ -60 -35 ~ -55 -50 ~ -120  
11.Fluids Resistance              
*Water Χ ○ ~ ● ● ● ● ○ ●
*Gasoline Χ Χ ● Χ ○ Χ ~ △ ●
*Natural Oil △ ~ ○ △ ~ ○ ○ ○ ~ ● ○ ● ●
*Synthetic Lubricants Χ Χ ○ ~ ● Χ △ Χ ●
*Alcohol Χ ● ● ● ● ● ●
*Toluene Χ Χ ○ △ Χ Χ ~ △ ○
*Ketone Χ ~ ○ Χ Χ ~ △ ○ Χ ~ △ Χ ~ △ △
*Ether Χ ~ △ △ ~ ○ Χ ● △~ ○ ○ △
*Acetic Acid ● Χ ~ △ Χ ~ △ ● Χ △ △
*Conc. Inorganic Acids △ ~ ○ Χ △ ○ ○ △ ●
*Dilute Inorganic Acids ● ○ ○ ● ● ○ ●
*Conc. Alkalies △ ~ ○ ○ ○ ● ● ● ●
*Dilute Alkalies ● ○ ○ ● ● ● ○
12.Heat Resistance(℃) 100 100 120 125 125 220 250
13.Aging Resistance ○ ○ ● ● ● ● ●
14.Flame Resistance Χ Χ △ Χ ○ △ ~ ○ ○
15.Steam Resistance △ △ △ ~ ○ ○ ~ ● △ △ ~ ○ ○ ~ ●
16.Weather Resistance △ △ △ ● ● ● ●
17.Ozone Resistance Χ Χ △ ● ● ● ●
18.Insulating Property ● ● △ ● ● ○ ~ ● ○
19.Gas Permeability △ △ ○ ~ ● △ ○ △ △

EXCELLENT ● 　GOOD ○ 　FAIR △　 NOT RECOMMEND Χ

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