Untitled Document
 
 
 
 
 
 
 
 
 
 
 
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 ○ ○ ○ ○ ◎ ◎ ◎
 
 
 
VALUATION ◎ : VERY GOOD ○ : GOOD  △ : USABILITY  X : UNQUALIFIED
    CSM NBR ACM U Q FKM

CHARACTERISTICS
OF
NATURAL RUBBER

  SPECIFICGRAVITY 1.11~1.18 1.00~1.20 1.09~1.10 1.00~1030 0.95~0.98 1.80~1.82
 ML100C
 VISCOSITY ML100C		 30~55 30~100 45~60 25~60 - 65~180
WORKABILITY △ ◎ △ △ ○ ○

MACHANICAL
CHARACTERISTICS
OF
RESISTANCE
ADDED RUBBER

  HARDNESS 40~95 30~100 40~90 10~100 30~90 60~90
 TENSILE STRENGTH 70~250 50~250 70~120 200~450 40~100 70~180
 ELONGATION 100~500 100~800 100~600 300~800 50~500 100~400
 REPULSION ELASTICITY △ △ △ ◎ ◎ △
 COMPRESSIVE  SHRINKAGE △ ○ - ◎ ◎ △
 WEAR RESISTANCE ◎ ◎ △ ◎ X ○
 BENDING RESISTANCE
 REGULARITY		 ○ ○ ○ ◎ △ ○

CHARACTERISTICS
OF
OIL-CHEMICALS
PROOF OF
RESISTANCE
ADDED RUBBER

  HEAT RESISTANCE 150 130 180 80 230 260
 LOW TEMPERATURE
 RESISTANCE		 -20~-45 -10~-40 -30 -30~-50 -90 -30
 GAS PENETRATION ◎ ○ ○ ○ △ ◎
 GASOLINE △ ◎ ○ ◎ △ ◎
 BENZENE-TOLUENE △ △ X △ △ ◎
 ALCOHOL ◎ ◎ X △ ◎ ◎
 STRONG ACID ◎ ○ △ X △ ◎
 WEAK ACID ◎ ○ ○ △ ○ ◎
 STRONG ALKALI ◎ ○ △ X ◎ X
 WEAK ALKALI ◎ ○ ○ X ◎ △