Datasheet

Main features
Pure gum property
(specific gravity)
Impact resilience
Abrasion resistance
Tear resistance
Flex crack resistance
Heat aging
Weather resistance
Ozone resistance
Gasoline/Gas oil
Benzene/Toluene
Alcohol
Ether
Ketone (MEK)
Ethyl acetate
Water
Organic acid
Strong alkali
Weak alkali
1.00-1.20





120
0
—






X/ 


X/ 
X
X/



X/ 

/




0.95-0.98


X/ 
X/ 
X/

200
–30
—






X/ 
X/ 
X


X/ 










1.00-1.30








60
0
—





X/ 


X/ 

X
X
X/


X
X

X
X
1.80-1.82





250
0
—






X/ 




 /


X/ 
X
X


 /







0.86-0.87




150
–20
—




X/ 
X
X









X







1.00-1.20





100
0
10
4
or less






X/ 


X/ 
X
X/



X/ 

/




0.95-0.98


X/ 
X/ 
X/

200
–10
10
4
or less






X/ 
X/ 
X


X/ 










Physical properties of blended gum
Chemical resistance
Oil resistance
Alkaline resistance
Acid resistance
NBR
(Nitrile
rubber)
Silicone
rubber


= Excellent --- Not affected at all, or almost no effect

= Good --- Affected a little, but adequate resistance depending on conditions
 = Better not to use if possible
X = Unsuitable for usage. Severely affected.
∗ Properties, chemical resistance, and other values are not guaranteed. These values depend on the operating environment, so they cannot be guaranteed
by SMC. Thorough research and confirmation are necessary before usage.
Good oil
resistance,
abrasion
resistance,
and aging
resistance
Excellent
heat
resistance,
and cold
resistance
Urethane
rubber
Excellent
mechanical
strength
FKM
(Fluoro
rubber)
Best heat
resistance,
and
chemical
resistance
EPR
(Ethylene-
propylene
rubber)
Good aging
resistance,
ozone
resistance,
and electrical
properties
Conductive
NBR
(Nitrile
rubber)
Good oil
resistance,
abrasion
resistance, and
aging resistance.
Conductive
Conductive
silicone
rubber
Very
excellent heat
resistance,
and cold
resistance.
Conductive
0.161 g/cm
3
X/ 
X
X
X
120
–20
3.8 x 10
4



X
X
X

X
X
X

X
X
X


Conductive
CR sponge
(Chloroprene
sponge)
Excellent impact
resilience, and
sound
insulation.
Flame
retardance
0.4 g/cm
3
X/ 
X
X
X
180
–30
4.8 x 10
4



X
X
X

X
X
X

X
X
X


Conductive
silicone
sponge
Excellent
heat
insulation,
and impact
resilience
 Rubber Material and Properties
1.15-1.25






150
–40
—






X/ 


X/ 

/

X/ 


X/ 







CR
(Chloroprene
rubber)
Well balanced
weather
resistance, ozone
resistance, and
chemical
resistance
General
name
 Colour and Identification
Colour of rubber
Black White Brown Black Black Black Black Black Black Black
———
· Silver 1 dot · Silver 2 dots
——
· Green 1 dot
·
· Red 1 dot
·
·
Maximum operation
temperature °C
Minimum operation
temperature °C
Volume
resistivity (cm)
Gas permeability
resistance
Organic acid of high
concentration
Organic acid of low
concentration
Identification
(Dot or stamp)
General
name
Model Selection
NBR
(Nitrile
rubber)
Silicone
rubber
Urethane
rubber
FKM
(Fluoro
rubber)
EPR
(Ethylene-
propylene
rubber)
Conductive
NBR
(Nitrile
rubber)
Conductive
silicone
rubber
Conductive
CR sponge
(Chloroprene
sponge)
Conductive
silicone
sponge
CR
(Chloroprene
rubber)
Front matter 15