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NBR |
EPDM |
FKM |
VMQ |
| Physical
Special Quality and Property of Synthetic Rubbers |
| Specific
Gravity |
|
1.00~1.20 |
0.86~0.87 |
1.80~1.82 |
0.95~0.98 |
| Solidity(Shore-A) |
40-90 |
40-90 |
60-90 |
30-80 |
| Tensile
Strength(kg/cm2) |
50-250 |
50-200 |
70-150 |
30-90 |
The
Coefficient of Expansion (%) |
100-500 |
100-500 |
100-300 |
100-500 |
| Repulsive
Elasticity |
B |
B |
C |
A |
| Max.
Temperature(°C) |
100 |
140 |
220 |
200 |
| Min.
Temperature(°C) |
-25 |
-40 |
-25 |
-75 |
Abrasion-Proof
|
A |
C |
B |
C |
Winding
Cracking-Proof
|
B |
B |
B |
C |
Ozone-Proof
|
D |
A |
A |
A |
Permanent
Compressive Shrinkage-Proof
|
B |
B |
B |
B |
Ggas
Permeability-Proof
|
B |
C |
B |
D |
Flame-Proof
|
D |
D |
A |
C |
Oil-Proof
& Solvent-Proof of Synthetic Rubbers
|
lubricating
oil
|
|
A |
D |
A |
B |
| GASOLIN |
B |
D |
A |
D |
| Hydrocarbon
of Relative Fatty |
A |
D |
A |
D |
| Hydrocarbon
of Relative Aromatic |
D |
D |
B |
D |
| Lorine
Solvent
|
D |
D |
A |
D |
| ALCOHOL |
A |
A |
B |
C |
| KRTONE |
B |
A |
C |
B |
| Acid-Proof
& Alkali-ProoZf of Synthetic Rubbers |
Water |
|
A |
A |
A |
A |
Weak
Acid
|
B |
A |
A |
B |
Strong
Acid
|
D |
B |
A |
D |
| Alkali |
B |
A |
C |
B |
* Information is based upon published data. dongjooAP
gloves have not been individually tested
against these chemicals. Variability in material
thickness, Pressure, temperature, and length of
exposure to chemicals will affect specific performance.
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NBR(Nitrile Butadiene Rubber)
BUNA-N is a copolymer of butadiene
and acrylonitrile. BUNA-N has good solvent, oil, water and hydraulic
fluid resistance. It displays good compression set, abrasion resistance
and tensile strength. BUNA-N should not be used in highly polar solvents
such as acetone and methyl ethyl ketone, nor should it be used in
chlorinated hydrocarbons, ozone or nitro hydrocarbons. |
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EPDM(Ethylene Propylene Dien Monomer)
EPDM has good abrasion and tear
resistance and offers excellent chemical resistance to a variety of
acids and alkalines. It is susceptible to attack by oils and is not
recommended for applications involving petroleum oils, strong acids
or strong alkalines. It has exceptionally good weather, ageing and
ozone resistance. It is fairly good with ketones and alcohols.
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FKM/FPM(Fluorocarbon Elastomers)
FKM is inherently compatible with
a broad spectrum of chemicals. Because of this extensive chemical
compatibility, which spans considerable concentration and temperature
ranges, fluorocarbon elastomers have gained wide acceptance as a material
of construction for butterfly valve o-rings and seats. Fluorocarbon
elastomers can be used in most applications involving mineral acids,
salt solutions, chlorinated hydrocarbons, and petroleum oils. They
are particularly good in hydrocarbon service. |
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VMQ(Dimethyl Polysiloxane)
VMQ is typically have moderate
solvent resistance. Heat and low temperature characteristics, oxidation
and ozone resistance are good. A primary feature of silicone is its
release characteristics. Silicone can be blended with other materials
to offer increased physical characteristics. Silicone would typically
be used in applications that have high temperature or have specific
chemical compatibility issues. |
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