| Information |
NATURAL
RUBBER |
SBR |
BUTYL |
HNBR |
EP |
BUNA-N |
Common Name
ASTM D-2000 classification
Military(Mil-Std417)
Chemical Definition |
Natural Rubber
AA
RN
Polyisoprene |
SBR, GRS
AA, BA
RS
Styrene Butadiene |
Butyl
AA, BA
RS
Isobutylene Isoprene |
HNBR
Hydrogenated Acrylonitrile
Butadiene |
EPR, EPT, EPDM
CA
RS
Ethylene Propylene |
Buna N, Nitrile, NBR
BF, BG, BK
SB
Butadiene Acrylonitrile |
General Characteristics
Durometer-Range (Shore A)
Tensile Range (P.S.I)
Elongation (Max.%)
Compression Set
Resilience-Rebound
Abrasion Resistance
tear Resistance
Solvent Resistance
Oil Resistance
Low Temperature Usage (￠XF)
High Temperature Usage (￠XF)
Aging Weather-Sunlight
Adhesion To Metals
Usual Hardness Range
|
20-90
500-3500
700
Excellent
Excellent
Excellent
Excellent
Poor
Poor
-20￠X to -60￠X
to 175￠X
Poor
Excellent
35-80 Shore A |
30-90
500-3000
600
Good
Good
Excellent
Fair
Poor
Poor
0￠X to -50￠X
to 225￠X
Poor
Excellent |
40-90
500-3000
850
Fair to Good
Fair
Fair
Good
Poor
Poor
-10￠X to -60￠X
to 250￠X
Excellent
Good |
2600
530
Excellent
Excellent
Excellent
Excellent
Good
Excellent
-65￠X to 250￠X
to 350￠X
Excellent
Good
60-80 Shore A |
30-90
500-2500
600
Good
Good
Good
Fair
Poor
Poor
-20￠X to 60￠X
to 350￠X
Excellent
Fair to Good
50-90 Shore A |
20-95
200-3000
600
Good
Good
Excellent
Good
Good to Excellent
Good to Excellent
+30￠X to -40￠X
to 250￠X
Poor
Good to Excellent
50-90 Shore A |
| FEATURES |
Advantage:
1.High resilience.
2.Good compression set.
3.Food roll building behavior and molding properties.
4.Good friction surface, but not a fine smooth surface when ground.
5.High tear strength.
6.Low crack growth.
7.Good low temperature.
8.Usable for ketones and alcohol.
9.Good low temperature properties.
Disadvantage:
1.Not recommended for oil and solvent resistance and ozone attacks it. |
Advantage:
1.Low cost non-oil resistance material.
2.Good water resistance and resilience up to 70 durometer.
3.Satisfactory for most moderate chemical and wet or dry organic acids.
Disadvantage:
1.Not recommended for ozone, strong acids, oils, greases, fats and most hydrocarbons. |
Advantage:
1.Impermeable to most common gasses.
2.Good resistance to sunlight and ozone Normally satisfactory when exposed to animal and vegetable oils and oxidizing chemicals.
Disadvantage:
1.Not recommended for use with petroleum solvent, coal tar and aromatic hydrocarbons. |
Advantage:
1.Exhibit better wear resistance than standard nitrile.
2.Excellent abrasion, compression set, tensiles, and tear properties.
3.Good resistance to ozone, sunlight, and other atmospheric conditions.
Vastly improved resistance to heat aging up to 300￠XF range and, for short periods, in the 350￠XF range available material exhibits a low temperature range -40￠XF
Disadvantage:
1.Not recommended for exposure to ketone, esters, aromatic fluids. |
Advantage:
1.Exceptionally good weather aging and ozone resistance.
2.Excellent water and chemical resistance
3.Excellent resistance to gas permeability and aging due to exposure to steam.
4.Excellent resistance up to 350￠XF
5.Good in ketones and Alcohols.
Disadvantage:
1.Not recommended for food applications or exposure to aromatic hydrocarbons. |
Advantage:
1.Has good solvent, oil, water and hydraulic fluid resistance.
2.Good compression set, abrasion resistance and tensile strength.
Disadvantage:
1.Not recommended for using in highly polar solvents such as acetone, and MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons. |
|
| Information |
HYDRIN |
NEOPRENE |
HYPALON |
SILICONE |
FLUORO
SILICONE |
FLUORO
ELASTOMERS |
PERFLUORO
ELASTOMER |
Common Name
ASTM D-2000 classification
Military(Mil-Std417)
Chemical Definition |
Hydrin
CH, DK, DJ
SB
Epichlorohydrin |
Neoprene
BC, BE
SC
Polychloroprene |
Hypalon
CE
SC
Chlorosulfonated/
polyethylene |
Silicone
FC, FE, GE
TA
Polysiloxane |
Fluorosilicone
FK
MIL-R-25988, Amend.2
Flurosilicone |
Fluoro Elastomers
HK
MIL=R-25897/MIL-R-83248
Fluorinated Hydrocarbon |
FFKM,PFE PERFLUOROELASTOMER
HK
Perfluorinated Hydrocarbon |
General Characteristics
Durometer-Range (Shore A)
Tensile Range (P.S.I)
Elongation (Max.%)
Compression Set
Resilience-Rebound
Abrasion Resistance
tear Resistance
Solvent Resistance
Oil Resistance
Low Temperature Usage (￠XF)
High Temperature Usage (￠XF)
Aging Weather-Sunlight
Adhesion To Metals
Usual Hardness Range
|
40-90
500-2500
350
Good
Good
Good
Good
Good
Excellent
-15￠X to -50￠X
to 225￠X
Good
Good
50-90 Shore A
|
20-95
500-3000
600
Good
Excellent
Excellent
Good
Fair
Fair
+10￠X to -50￠X
to 250￠X
Good
Good to Excellent
50-90 Shore A |
45-90
1000-3000
500
Fair
Fair
Excellent
Good
Fair to Good
Fair to Good
-30￠X to -60￠X
to 225￠X
Excellent
Excellent |
30-90
200-1500
700
Good
Good
Fair to Poor
Poor
Poor
Fair to Poor
-60￠X to -150￠X
to 450￠X
Excellent
Good
50-90 Shore A |
50-80
500-800
300
Good
Excellent
Poor
Poor
Fair
Good
-80￠X
300￠X
Excellent
Poor |
60-90
500-2000
300
Good
Fair
Good
Good
Excellent
Excellent
+10￠X to -10￠X
400￠X to 600(depending on time and service condition)
Excellent
Good |
60-90
1700-2900
200
Good
Good
Good
Good
Excellent
Excellent
+10￠X to 0￠X
400￠X to 600(depending on time and service condition)
Excellent
Good |
| FEATURES |
Advantage:
1.Exhibiting most of the better qualities of nitrile and neoprene.
2.Good resistance to oil and solvent.
3.Has low swell in gasoline.
4.Low temperature performance is better than either nitrile or neoprene.
5.Offers much less torsional stiffness at sub zero temperatures.
6.High temperature endurance is good up to 250￠XF.
7.Good ozone weathering and water resistance.
8.The abrasion is equivalent to the nitriles.
Disadvantage:
1.Not recommended for ketones, esters, aldehydes, chlorinated and nitro hydrocarbons. |
Advantage:
1.High resilience with low compression set.
2.flame resistance.
3.Compounds free of sulphur are easily made.
4.Animail and vegetable oil resistance.
Not affected by moderate chemicals, fats, greases and many oils and solvents.
Disadvantage:
1.Not recommended for strong oxidizing acids, esters, ketones, chlorinated aromatic and nitro hydrocarbons. |
Advantage:
1.Good resistance to oxifation and ozone, as well as flame resistance.
2.Similar to neoprene except with improved acid resistance.
3.Abrasion resistance is excellent.
4.The equivalent of nitrile, low friction surface.
5.The oil and solvent resistance about intermediate between neoprene and nitrile.
6.Recommended for immersion in water.
Disadvantage:
1.Not recommended for exposure to concentrated oxidizing acids, esters, ketones, chlorinated, aromatic and nitro hydrocarbons. |
Advantage:
1.Being compounded to have tensile in the area of 1500 PSI and tear up to 200 lbs.
2.Low compression set and good resilience.
3.moderate solvent resistance.
4.Excellent heat resistance.
5.Good release characteristics.
6.Extreme low temperature properties.
7.Highly resistance to oxidation and ozone attack.
Disadvantage:
1.Not recommended for most concentrated solvents, oils, concentrated acids and dilute sodium hydroxide. |
Advantage:
1.More expensive than silicone, and for special applications where general resistance to oxidizing chemicals, aromatic and chlorinated solvent bases is required.
Disadvantage:
1.Not recommended for and general attacked when exposed to brake fluids, hydrazine and ketones.
2.Should not be confused with silicone in regard to high heat resistance. |
Advantage:
1.Heat resistance up to 600￠XF
2.Resistance to wide range of oils and solvents; specially all aliphatic, aromatic and halogenated hydrocarbons, acids, animal and vegetable oils.
Disadvantage:
1.Nor recommended for ketones, low molecular weight esters and nitro containing compounds. |
Advantage:
1.Heat resistance up to 600￠XF
2.Resistance to wide range of oils and solvents; specially all aliphatic, aromatic and halogenated hydrocarbons, acids, animal and vegetable oils.
3.Excellent outgassing performance in vacuum environments.
Disadvantage:
1.Avoid low-molecular-weight, fully halogenated fluids and molten alkali metals. |
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