Base Rubber Material Feature Table

CHARAC TERISTICS	MATERIALS
	Natural rubber NR	Styrene 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 (100ºC)	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 (ºC)	-50 ~ -70	-30 ~ -60	-20 ~ -50	-40 ~ -60	-35 ~ -55	-50 ~ -120
11. FLUIDS RESISTANCE
*WATER	×	○-●	●	●	●	○	●
*GASOLINE	×	×	●	×	○	×-△	●
*NATURAL OIL	△-○	△-○	○	○-●	○	●	●
*SYNTHETIC LUBRICANTS	×	×	○-●	×	△	×	●
*ALCOHOL	×	●	●	●	●	●	●
*TOLUENE	×	×	○	△	×	×-△	○
*KETONE	×-○	×	×-△	○	×-△	×-△	△
*ETHER	×-△	△-○	×	●	△-○	○	△
*ACETIC ACID	●	×-△	×-△	●	×	△	△
*CONC. INORGANIC ACIDS	△-○	×	△	○	○	△	●
9.DILUTE INORGANIC ACIDS	●	○	○	●	●	○	●
10.CONC. ALKALIES	△-○	○	○	●	●	●	●
11.DILUTE ALKALIES	●	○	○	●	●	●	○
12. HEAT RESISTANCE (ºC)	100	100	120	125	125	220	250
13. AGING RESISTANCE	○	○	●	●	●	●	●
14. FLAME RESISTANCE	×	×	△	×	○	△-○	○
15. STEAM RESISTANCE	△	△	△-○	○-●	△	△-○	○-●
16. WEATHER RESISTANCE	△	△	△	●	●	●	●
17. OZONE RESISTANCE	×	×	△	●	●	●	●
18. INSULATING PROPERTY	●	●	△	●	●	○-●	○
19. GAS PERMEABILITY	△	△	○-●	△	○	△	△

EXCELLENT● GOOD○ FAIR△ NOT RECOMMEND×