CHARACTERISTICS/MATERIALS

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

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●

○-●

○-●

○-●

△-●

○-●

7.TEAR RESISTANCE

●

△

○

△

△-○

△

△

8.ABRASION RESISTANCE

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●

●

○

●

△

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9.RESILIENCE

●

○

○

○

●

△-●

○-●

10.BRITTLE POINT (℃)

-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

△-○

×

△

○

○

△

●

*DILUTE INORGANIC ACIDS

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○

●

●

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●

*CONC. ALKALIES

△-○

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○

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*DILUTE ALKALIES

●

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●

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12.HEAT RESISTANCE(℃)

100

100

120

125

125

220

250

13.AGING RESISTANCE

○

○

●

●

●

●

●

14.FLAME RESISTANCE

×

×

△

×

○

△-○

○

15.STEAM RESISTANCE

△

△

△-○

○-●

△

△-○

○-●

16.WEATHER RESISTANCE

△

△

△

●

●

●

●

17.OZONE RESISTANCE

×

×

△

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●

●

●

18.INSULATING PROPERTY

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△

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19.GAS PERMEABILITY

△

△

○-●

△

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△