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| Materials |
Rubtechindia
can support you with engineering assistance including tool design,
material recommendation, compound formulation and prototype development.
Additionally, for a fee, we can provide the typical tests commonly
required for new compound development or reverse engineering.
Listed are the most popular materials provided. |
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| BUNA N (NITRILE): |
Has excellent
resistance to petroleum oils and gasolines. Resistance to
hydrocarbons, acids and bases is good. The temperature range
is -40°F to +212°F, intermittent to +230°F. Excellent resistance
to permanent compression. It does not possess good resistance
to ozone, sunlight or weather. Also available in an FDA
compound. |
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| NEOPRENE (CHLOROPRENE): |
Neoprene has good
resistance to oils, sunlight and aging. Temperature range
is
-40°F to +230°F, intermittent to +250°F. Resistance to compression
set is
good. Chemical resistance to silicone oil and grease, refrigerants,
ammonia
and carbon dioxide. Also available in an FDA compound.
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| SILICONE: |
Silicone retains
good elastomeric properties at both low and high
temperatures. Should not be exposed to fuels, solvents or
silicone fluids.
Silicone has excellent resistance to ozone, aging and weather.
Serviceable
temperature range from -67°F to +400°F, intermittent to
+450°F. Also available
in an FDA compound.
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| EPDM (EPR): |
EPDM combines
excellent resistance to deteriorative effects of ozone,
oxygen,
weather, heat and many chemicals. Its serviceable temperature
range is -40°F
to +250°F and intermittent to +275°F. It is not recommended
for use in contact
with petroleum oils or fluids. Also available in an FDA
compound.
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| FLUOROELASTOMER (VITON®): |
Viton® has
excellent resistance to high temperatures, ozone, oxygen,
fuels,
mineral oil and synthetic hydraulic fluids. Maximum operating
temperatures run
from 400°F in continuous service up to 500°F in intermittent
service. Also
available in an FDA compound.
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| POLYURETHANE: |
Polyurethane elastomers,
as a class, have excellent wear resistance and high
tensile strength, along with excellent ozone and oxidation
resistance.
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| NATURAL RUBBER: |
Crude natural
rubber is found in the juices of many plants, including
the
shrub guayule, Russian dandelion, goldenrod and dozens of
other shrubs, vines
and trees. The principal source is the tree Hevea Brasiliensis
which is native
to Brazil. Natural rubber has high resilience, good tensile
strength and good
tear resistance. It does not perform well when exposed to
chemicals and
petroleum derivatives. Natural rubber is inferior to many
of the synthetics in
heat aging, resistance to sunlight, oxygen, ozone, solvents
and oils. The
temperature range is -55°C to +55°C (-67°F to +122°F).
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| SBR (BUNA S): |
SBR is a copolymer
of styrene and butadiene and has properties similar to
natural rubber. It has greater abrasion resistance than
natural rubber, better
wear resistance and better low temperature flexibility.
Though superior in
water resistance to natural rubber, it has about the same
resistance to
solvents and chemicals. It has better heat resistance and
heat aging qualities
than natural rubber, and in excess heat it hardens and becomes
brittle instead
of softening as does natural rubber. Resistance to sunlight
and ozone is
similar to natural rubber. The temperature range of SBR
is -55°C to +70°C
(-67°F to +158°F). SBR rubber is available in sheet material,
but we do not
carry it in cord stock.
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| BUTYL: |
Butyl rubber is
a copolymer of isobutylene and isoprene. It has exceptionally
low gas and moisture permeability and outstanding resistance
to heat aging,
weather, ozone, chemical attack, flexing, abrasion and tearing.
It has good
resistance to phosphate ester based hydraulic fluids, and
has excellent
electrical isolation performance. Butyl is not recommended
for use when in
contact with petroleum oils and fluids. The temperature
range is -55°C to
+120°C (-67°F to +248°F). We carry only in sheet material.
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| TEFLON: |
When parts are
fabricated from TFE (polytetrafluroethylene) the exceptional
chemical, electrical, mechanical and thermal properties,
become apparent. TFE
properties are as follows: extreme corrosion resistance,
excellent weathering,
nonflammable, very low frictional coefficient, no-adhesive,
high heat
resistance, and surface resistivity, FDA compliant, USDA
approved. The working
temperature range for Teflon is -200°C to +260°C (-328°F
to +500°F).
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Disclaimer:
The technical data in the Rubtechindia website
(www.rubtechindia.com) are to be used as a guide only. Rubtechindia
does not guarantee the accuracy of the information and is not
responsible for its end use. |
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