VALUATION ◎ : VERY GOOD ○ : GOOD △ : USABILITY X : UNQUALIFIED |
|
|
NR |
IR |
BR |
SBR |
IIR |
EPDM |
CR |
CHARACTERISTICS
OF
NATURAL RUBBER
|
SPECIFICGRAVITY |
0.92~0.93 |
0.92~
0.39 |
0.91~0.94 |
0.93~0.94 |
0.91~0.93 |
0.86~0.87 |
1.15~1.25 |
ML100C
VISCOSITY ML100C |
90~150 |
55~90 |
35~55 |
30~60 |
45~75 |
45~120 |
45~120 |
WORKABILITY |
◎ |
◎ |
◎ |
◎ |
△ |
O |
◎ |
MACHANICAL
CHARACTERISTICS
OF
RESISTANCE
ADDED RUBBER |
HARDNESS |
30~100 |
30~
100 |
40~100 |
40~100 |
30~90 |
40~90 |
30~90 |
TENSILE STRENGTH |
60~300 |
60~
300 |
60~200 |
60~200 |
60~200 |
60~200 |
60~250 |
ELONGATION |
100~1000 |
100~
1000 |
100~800 |
100~800 |
100~800 |
100~800 |
100~1000 |
REPULSION ELASTICITY |
◎ |
◎ |
◎ |
○ |
X |
○ |
○ |
COMPRESSIVE SHRINKAGE |
◎ |
◎ |
○ |
○ |
△ |
○ |
○ |
WEAR RESISTANCE |
○ |
○ |
◎ |
○ |
△ |
○ |
○ |
BENDING RESISTANCE
REGULARITY |
◎ |
◎ |
△ |
○ |
◎ |
○ |
○ |
CHARACTERISTICS
OF
OIL-CHEMICALS
PROOF OF
RESISTANCE
ADDED RUBBER
|
HEAT RESISTANCE |
100 |
100 |
110 |
110 |
140 |
150 |
120 |
LOW TEMPERATURE
RESISTANCE |
-50~-60 |
-50~
-60 |
-70 |
-30~-50 |
-30~-60 |
-40~-60 |
-35~-50 |
GAS PENETRATION |
○ |
○ |
○ |
△ |
◎ |
◎ |
○ |
GASOLINE |
X |
X |
X |
X |
X |
X |
○ |
BENZENE-TOLUENE |
X |
X |
X |
X |
△ |
△ |
X |
ALCOHOL |
◎ |
◎ |
◎ |
◎ |
◎ |
◎ |
◎ |
STRONG ACID |
△ |
△ |
△ |
△ |
◎ |
○ |
○ |
WEAK ACID |
○ |
○ |
○ |
○ |
◎ |
◎ |
◎ |
STRONG ALKALI |
○ |
○ |
○ |
○ |
◎ |
◎ |
◎ |
WEAK ALKALI |
○ |
○ |
○ |
○ |
◎ |
◎ |
◎ |