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| Natural
Rubber |
Natural
rubber has an excellent memory capability and
abrasion resistance. Its hardness ranges from
35-95 duro and is offered by a variety of colors.
It is excellent for the paper and textile industry.
It has good resistance to alcohols and dilute
acids.
Specialty
Compounds
High & Low Grade, Anti-Static, SBR Blend,
No Carbon Black.
Generally
Resistant To
Water, Air and Average Concentration Acids,
Base Alcohols, Salts, Ketones, Best Abrasion
Resistance.
Limitations
Acceptable resistance to ketones and acetate
solvents, and poor resistance to oils, aromatic
and aliphatic solvents.
View
Compound Properties
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| SBR |
This
type of compound offers excellent abrasion resistance
and high tear strength, and resistance to weak
acids and alcohol’s. The maximum continuous
use temperature is 250 degrees F. Such coverings
can be use on conveyor drives, pulleys bridle
and pinch rolls used in non organic solvent applications.
Its hardness ranges from 40-90 duro and offers
a variety of colors. SBR offers high tensile strength
(Max 3000 psi), it has high quality abrasion.
Specialty
Compounds
High & Low Grade, Neoprene Blend, NBR/NR
Blend-NM, Natural Blend (i.e. TS60XL).
Generally
Resistant To
Water, Air, Anti-Freeze, Detergents, Salt Solutions,
Bases, Alcohols and some Acids.
Limitations
Poor oil, grease, ozone, hydrocarbons and solvents.
View
Compound Properties
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| Neoprene |
Neoprene
is general used in a wide range of industrial
applications. It is noted for its tensile strength,
low compression set, cut, light, heat, aging,
radiation and ozone resistance. Temperature service
is 250 degrees F. Its hardness ranges from 5-90
duro with a wide range of colors.
Specialty
Compounds
Low Grade, High Grade, Medium Grade, Anti-static,
Water Resistant, FDA.
Generally
Resistant To
Moderate Acids and Chemicals, Ozone, Oils, Fats
and Solvents. Oily Abrasive Applications.
Limitations
Poor resistance to ketones and acetate solvents.
View
Compound Properties
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| Nitrile/PVC |
Nitrile
has high excellence to oils and ink applications.
Its temperature ranges to 225-250 degrees F. Its
hardness ranges from 20-90 duro and is offered
by a variety of colors. Nitrile has good tensile,
tear, abrasion, compression set, resilience properties.
Specialty
Compounds
High Temp, Low Grade, Anti-Static, FDA, USDA.
Limitations
Poor resistance to ketones and acetates.
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Compound Properties
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| XNBR |
Chemically
XNBR is similar to Nitrile rubber. However, the
polymer backbone has been chemically modified
with a Carboxylic Acid containing group. The result
is a Nitrile rubber with outstanding abrasion
resistance and chemical resistance superior to
that of traditional Nitrile.
This makes XNBR well suited for a wide variety
of applications. XNBR has abrasion resistance
which is better and BUNA N, Neoprene, EPDM, Hypalon
and Natural Rubber. It is comparable to high strength
urethane.
Its
most important properties are:
· Resistance to aliphatic hydrocarbons
(ie: oil based inks)
· Abrasion resistance
· Cost effectiveness compared to alternative
abrasion resistant types
· Ease of manufacturing
View
Compound Properties
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| HNBR |
Available
in a hardness range of 45-98.
In
the last decade, significant competitive pressures
have led companies around the world to evaluate
more efficient production technologies. High
performance materials that once might have been
considered too expensive are now being considered
to reduce maintenance and downtime costs. Because
of the demand for greater durability and overall
performance, roller manufacturers are reevaluating
traditional roll coverings and exploring materials
with superior characteristics. One of the materials
offering significant performance improvement
is HNBR. This elastomer was developed to provide
better heat and oil resistance than standard
NBR grades.
HNBR surpasses conventional NBR compounds in
the following areas:
· Mechanical properties
· Dynamic properties
· Oil and fuel resistance
· Heat resistance
· Improved abrasion resistance
· Excellent dynamic properties and low
hysteresis
· Improved tear and chunk out resistance
· Retention of roll geometry
At
high temperatures HNBR is superior to urethane
in both abrasion resistance and dynamic properties.
At ambient and high temperatures it has superior
tensile, tear and abrasion resistance. And at
room temperature it has abrasion resistance
equaled only by height strength liquid cast
urethane. This balance of properties help HNBR
roll covering improve productivity by providing
higher performance and reducing downtime and
maintenance costs. Head to head trials have
shown HNBR compounds last three to five times
longer than typical roll coverings.
HNBR
compounds also have superior heat resistance.
These compounds are stable up to 350F while
the best straight NBR compounds degrade at 275F.
HNBR’s physical properties are maintained
over the range of temperatures, as opposed to
urethane elastomers which degrade proportionally
to changes in temperatures.
The
initial higher cost of HNBR compounds is more
than made up for in improved performance and
long term savings in maintenance and downtime
costs.
View
Compound Properties
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| Silicone |
Silicones
have excellent Release (white in color), fair
abrasion and cut resistant properties. It’s
design for high temperatures application up to
500 degrees F for applications including laminating,
plastic film, spot waxing etc... Silicone offers
a wide range of colors that includes white, red,
grey, black, blue, orange etc. Its hardness ranges
to 15-80 duro with a tensile strength ranging
from 600-1500 psi. It has excellent reliance and
compression set.
Specialty
Compounds
Anti-Static 60 duro, FDA White-Conductive to
.001 Ohms.
Generally
Resistant To
Moderate or Oxiding Chemicals, Ozone, Concentrated
Sodium Hydroxide.
Limitations
Fair oil and solvent resistance.
View
Compound Properties
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| EPDM |
EPDM
has an excellent abrasion, zone and ultra violet
light resistance. It can be used with ketones,
alcohols, glycols and most alkalis. Epdm is chemical
saturated so that it is not affected by steam.
Its hardness ranges from 25-85 duro. It has good
heat resistance and it’s most recommended
for film manufacturing, processing, and laminating
it also offers excellent insulation characteristics.
Specialty
Compounds
High Grade Sulphur & Peroxide, Non Marking,
Anti-Static, Premium.
Generally
Resistant To
Vegetable and Animal Fats, Oils, Ozone, Many strong
and Oxidizing Chemicals, Ketones, Alcohols.
Limitations
Poor resistance to oils and aromatic solvents.
View
Compound Properties
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| Hypalon |
Hypalon
is recommended for picking lines using oxidizing
acids, polyethylene corona treatment rolls, and
laminating rolls up to 350 degrees. It has a superior
resistance to abrasion, chemical and oxidizing
acids. Hardness ranges from 40-90 duro and offers
a variety of colors.
Specialty
Compounds
Sulphur, Peroxide, Anti-Static, Non Marking,
Generally
Resistant To
Strong Acids and Bases, Freon’s, Hydroxides,
Ozone, Alcohols, Etching, Alkaline and Hypo
chlorite Solutions.
Limitations
Not for Ketones, Esters, Certain Chlorinated
Oxiding Acids, Chlorinated, Nitro and Aromatic
Hydrocarbons.
View
Compound Properties
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| Urethane |
Is
one of the most outstanding compounds for abrasion
and cut resistance. It is found in applications
of feed rolls, pinch rolls, idlers rolls, oiling
rolls, conveyor pulleys, tension level rolls,
and contact rolls on belt sanders. It has tremendous
physical strength and high duro is required. Hardness
ranges from 60-90 duro with a wide range of colors
and it has a tensile strength of 10,000 psi with
an elongation of 700%.
Generally
Resistant To
Moderate Chemicals, Oils, Fats, Greases and
many Hydrocarbons.
Limitations
Not to be used at high speeds. Not for Concentrated
Acids, Ketones, Esters, Chlorinated and Nitro
Hydrocarbons
View
Compound Properties
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| Viton |
One
of the most high heat resistance of rubbers it
has capabilities of 600 degrees F. It offers excellent
chemical and solvent resistance, and abrasion
and cut resistance even at elevated temperatures;
with good compression set. Its hardness ranges
from 45-75 duro with a limited of colors offered.
Generally
Resistant To
All Aromatic, Aliphatic and Halogenated
Hydrocarbons. Many acids, Animal and Vegetable
Oils.
Limitations
Not For: Ketones, Ester, MEK, and Nitro Containing
Compounds. High cost. Usually used for last
resort.
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Compound Properties
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| Thiokol |
Used
for excellence in graining and coating applications.
It provides outstanding resistance to most solvents,
including ketone and aromatic and is used in the
paint and ink industry. Excellent oil and good
solvent resistance and the maximum temperature
used for this application are 250 degrees F. Hardness
ranges from 35-70 duro with a limited of colors
offered.
View
Compound Properties
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