| ASTM DESIGNATION D-1418-79 |
COMMON NAME |
GENERAL PROPERTIES |
| ABR |
Acrylic |
+ Excellent resistance to high temperature, oil and air, ozone, and
weathering. - Poor low temperature properties. Not recommended for
water service. |
| AFMU |
Teflon, Kel-F |
+ Excellent chemical resistance. Excellent high and low temperature
properties. |
| AU |
Urethane |
+ Good aging and excellent abrasion, tear, and solvent resistance. - Poor high temperature properties. |
| BR |
Butadiene rubber |
+ Excellent abrasion resistance and low temperature properties. High
resilience |
| CPE |
Chlorinated- polyethylene |
+ Excellent ozone and weathering resistance; good heat resistance.
Moderate resistance to petroleum-based fluids. |
| CR |
Neoprene (Chloroprene) |
+ Good oil and petroleum based solvent resistance. Good weathering and
ozone resistance. Neoprene may be blended with SBR rubber to achieve an economically
priced sheet for moderately oil resistant applications. - Poor
resistance to degreaser solvents. Content levels of neoprene can vary widely. Application
problems may occur when using blended or commercial grades of neoprene sheet of unknown
quality levels in contact with oil, solvents and fuels. Where high oil or fuel resistance
is required, the fabricator and user need to specify one of the following.
¨ an ASTM call-out
¨ a military specification
¨ an ASTM-specified oil-resistance level based on an ASTM
test (e.g. oil swell) |
| CSM |
Hypalonâ
(a registered Trademark of DuPont) |
+ Good oil resistance, ozone resistance, heat resistance and
weathering resistance. Resists corrosive chemicals. - Tear resistance is fair.
Poor resistance to aldehydes, aromatic solvents, esters, and chlorinated solvents. Fair
resistance to ketones and ethers. |
| ECO |
Hydrin, Herchlor |
+ Good low temperature properties. Excellent oil and ozone resistance.
Fair flame resistance. - Low permeability to gases. |
| EPDM |
Ethylenepropylene - diene |
+ Excellent resistance to ozone, sunlight and oxygen. Excellent
resistance to acid, alkali and ketones. Excellent heat resistance and aging. - Poor resistance to fuels, oils and alcohols. |
| FPM |
VITONâ
fluoroelastomer, a registered trademark of DuPont |
+ Excellent resistance to heat and oil combinations hot greases found
in engines and compressors. Excellent resistance to a wide range of concentrated acids. - High cost of fluoroelastomer may limit usage to extreme
applications. Resilience is low and tear strength is limited unless certain compounding
steps are taken to improve it. Impact resistance is fair. |
| IIR |
Butyl (Isobutene-Isoprene) |
+ Excellent resistance to acid and alkali. Excellent weathering
properties and heat resistance. Excellent electrical resistance. Low permeability to air. - Poor resistance to fuels, solvents, oil and hydrocarbons. Cold
weather properties are fair. |
| IR |
Isoprene (synthetic) |
Similar to natural rubber |
| NBR |
Nitrile (butadiene-acrylo-nitrile)
based |
+ Excellent resistance to oils, solvents and fuels. Resistant to a
broader range of aromatic hydrocarbons than neoprene. Nitrite may be blended with SBR
rubber to achieve an economically priced sheet for moderately oil resistant applications. - Application problems may occur when using Nitrite of unknown quality
levels in extreme oil-resistance applications or in contact with fuels and solvents.
Content levels of Nitrite can vary widely. Where oil or fuel resistance is required, the
fabricator and user need to specify one of the following:
¨ an ASTM call-out
¨ a military specification
¨ an ASTM-specified oil-resistance level based on an ASTM
test (e.g. oil swell) |
| NR |
Natural rubber |
+ Good gasket material due to excellent physical properties such as
resilience, tear strength and wear resistance. Natural rubber is used effectively as sand
and shot blast curtain material because of its high abrasion resistance and resilience. - Deteriorates when exposed to oils, fuels, solvents, and hydraulic
fluids. Poor resistance to sunlight, ozone and oxygen. |
| Q |
Silicone |
+ Excellent properties for both hot and cold temperature extremes.
Excellent weathering properties and resists ozone and oxygen attack. Long service life can
be expected at 200° F. to 400° F. - Poor resistance to oils, fuels and hydrocarbons. Fair performance
when exposed to acids, alkalis and solvents. Physical properties (tensile, abrasion, tear
and cut growth) are fair. |
| SBR |
Styrene-butadiene |
+ Good abrasion resistance and excellent impact and cut-and-gouge
resistance. Can be compounded for use as skirtboard rubber, lining rubber, conveyor belt
covers, tires and other extremely demanding applications. Used as gasket material and as
an economical general-purpose sheet. - Not suited for use with
oils, fuels, solvents, or hydrolic fluids. |
