SIGLA |
DENOMINAZIONE COMMERCIALE |
DUREZZE DISPONIBILI |
TEMPERATURE D’IMPIEGO |
CARATTERISTICHE POSITIVE |
CARATTERISTICHE NEGATIVE |
IMPIEGO |
NR |
Natural Rubber
|
Da 35 a 90 Sh A |
Da -70° a 70° |
Excellent break lengthening;
Great resistance to tearing and wear.
Great elastic resistance, Good seawater resistance
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Poor resistance to lubricants and oils
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Bumpers, elastic supports, seals, anti-vibrations, rubber-metal bonding
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CR |
Neoprene |
da 40 a 80 Sh A |
da -45 a +120° |
Excellent resistance to oils, lubricants; Good resistance to weather, seawater, Excellent resistance to mechanical stresses. Self-extinguishing
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Poor adaptability to the medical sector and not suitable for the production of non-toxic items
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Bellows, seals, supporting membrane tubes etc. Much used in the Automotive sector
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NBR |
Nitrile |
da 30 a 90 Sh A |
da -40 a +120° |
Excellent resistance to oils, lubricants; Good resistance to weather, aging. Good resistance to mechanical stresses. Suitable for the production of certain types of non-toxic products.
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.
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Bellows, seals, supporting membrane tubes etc. Much used in the Automotive sector |
EPDM |
EPDM TERPOLIMERO |
da 35 a 90 Sh A |
da -50 a + 140 ° |
Excellent resistance to weathering, aging, heat and permanent deformation. Good resistance to mechanical stresses.
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Limited resistance to oils, fats, lubricants.
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Outdoor seals for automotive, blowers, seals, household appliances.
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IIR |
Butile |
Da 40 a 80 Sh A |
Da -45 a +150° |
Excellent resistance to paints and colors, Excellent dielectric resistance, Excellent seal to osmosis. Can be used for non-toxic products;
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Limited mechanical and elastic features
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Pharmaceutical and medical caps, paint passing tubes, electrical cables, air pressure seals
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AEM |
Vamac |
da 40 a 90 Sh A |
Da -30 a +175° |
Excellent waterproofness to air and gas;
Low elastic yield;
Excellent resistance to up to 170 degrees and heat. Low strain values
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Membranes, tubes Much used in the Automotive industry
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VMQ |
Silicone |
Da 20 a 80 Sh |
Da -65 a +200° |
Perfect behavior at high and low temperatures. Excellent resistance to weather and ozone. Excellent behavior to residual deformation after compression. Negative features: Modest mechanical properties. Bad behavior in contact with oils, benzines and fuels in general. Chemical Resistance: Chlorinated, solvents, UV Rays, Ozone, Oxygen, Cold and Heat, physiological liquids, supports oxidants.
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Poor resistance to:
Aromatic mineral oils (except for a few particular silicones);
Fuels (except for some particular silicones);
Overheated water vapour at more than 120 degrees Celsius;
Acids and alkali have destructive action on the material;
Oils and silicone fats
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Seals of all types; tubes for hot air and oxygen pipes; Electrical insulation for ships, aircraft, hot containers; Coatings for cylinders for example for sticky materials.
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FVMQ |
Fluorosilicone |
Da 30 a 80 Sh A |
-55 a + 200° |
Fluorosilic has properties similar to silicone mixtures, but the presence of fluoride in the composition greatly increases its compatibility with animal oils and minerals for the entire working temperature range, to alphilic and aromatic hydrocarbons, to acids. Discrete mechanical properties, excellent radiation resistance (gamma rays and UV), excellent dielectric properties. Excellent resistance to oxidation, ozone and weather. Good water resistance and diluted salt solutions
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Not compatible with silicone oils and alkali (also diluted), water vapor above 120 degrees Celsius. Poor gas waterproofing, self-extinguishing.
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Seals of all types; tubes for hot air and oxygen pipes; Electrical insulation for ships, aircraft, hot containers; Coatings for cylinders for example for sticky materials.
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