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Selection of Material

BENEFIT OF RUBBER

Rubber's ability to retain its elastic qualities throughout a wide temperature range has led to its employment in numerous industrial applications. Rubber is a material of choice for engineers and designers because to its many qualities. It may be produced using a variety of methods, such as sheeting, die- or machine-cut forms/gaskets, molded components, and extruded lengths that can be combined to create an infinite number of rings or other shapes.

Some of the properties include:

Whilst no single material has all the desired properties, indeed some properties may only exist in one type of rubber, by understanding the application involved, the desired properties can often be achieved with careful selection and suitable compounding.

SECTION & COSTING OF RUBBER

The same general guidelines apply whether you need a new part or replacements for ones that don't live up to your expectations in terms of availability, performance, pricing, or quality. If parts are to be supplied to customer satisfaction at the proper price, effective communication is essential. Having a basic drawing or an existing sample is an excellent place to start, but getting your questions answered now will help you avoid surprises and problems down the road.

We strongly recommend that a specification is produced to consider and record the following points:

As was previously established, no single variety of rubber may provide all the necessary qualities. On the other hand, a cost-effective material and production method will emerge through excellent communication and comprehension of the needs.

RUBBER DIRECTORY

NATURAL RUBBER

The initial organic substance that has been in since the turn of the century, for commercial purposes. An extensively used rubber with a wide variety oflow expense aggregates.

PROPERTIES:

LIMITATIONS:

TYPICAL APPLICATIONS:

SBR RUBBER

Styrene Butadiene Rubber One of the cheaper synthetic rubbers which is easy to process in large quantities.

PROPERTIES:

LIMITATIONS:

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EPDM RUBBER

Diene monomer of ethylene propylene One more low cost synthetic rubber, which was first created in the 1950s for use in the tire industry. Its increased usage was due to its exceptional resilience to weathering, ozone, and water.

PROPERTIES:

LIMITATIONS:

TYPICAL APPLICATIONS:

NEOPRENE RUBBER

Chloroprene Among the original synthetic rubbers created in an effort to find oil-resistant mixtures. widely utilized because of its broad range of practical qualities and a reasonable cost.

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LIMITATIONS:

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HYPALON RUBBER

Polyethylene Sulfonated with Chlorine One more rubber evolved in the 1950s. A mix of There are parallels between EPDM and Neoprene, including certain enhanced qualities.

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LIMITATIONS:

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NITRILE RUBBER

Betonitrileacrylonitrile An excellent oil-resistant rubber that functions fairly well when in touch with fuels. Higher resistance rubbers are available, but they cost a lot more money.

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LIMITATIONS:

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THERBAN RUBBER

Typically, HNBR Hydrogenated Nitrile fills in the disparity between the two in terms of cost and performance Viton and nitrile.

PROPERTIES:

LIMITATIONS:

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SILICONE RUBBER

The polysiloxane Good flexibility and a smooth, clean appearance are the typical characteristics of this rubber. It exhibits exceptional resilience to weathering and a wide working temperature range.

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VITON RUBBER

Suitable for the petrochemical sector, fluorocarbon The best overall resistance to harsh chemicals and lubricants is provided by this synthetic rubber, especially at high temperatures.

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FLUOROSILICONE RUBBER

Fluorinated Polysiloxane is most appropriate in There are low temperature conditions. particularly when in touch with harmful substances like oil and gasoline.

PROPERTIES:

LIMITATIONS:

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DATA CHART

COMMON NAME NATURAL SBR EPDM BUTYL NEOPRENE
CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE
CHEMICAL NAME Isoprene NR 1 30-95° Styrene Butadiene Copolymer SBR 1 40-95° Terpolymer of Ethylene Propylene & a Diene EPDM 1 20-85° Isobutene - Isoprene IIR 2 30-85° Chloroprene CR 2 30-90°
COLOURS FULL RANGE FULL RANGE FULL RANGE LIMITED RANGE LIMITED RANGE
HEAT RESISTANCE
(Maximum Continuous)
75°C / 105°C 85°C / 115°C 130°C / 150°C 130°C / 150°C 95°C / 125°C
LOW TEMPERATURE RESISTANCE -40°C -40°C -40°C -40°C -40°C
RESISTANCE TO OZONE & WEATHER FAIR / POOR FAIR / POOR EXCELLENT OUTSTANDING EXCELLENT OUTSTANDING VERY GOOD
PHYSICAL STRENGTH EXCELLENT GOOD GOOD GOOD GOOD
COMPRESSION SET GOOD GOOD GOOD GOOD FAIR TO GOOD
TEAR RESISTANCE VERY GOOD FAIR GOOD GOOD GOOD
ABRASION RESISTANCE EXCELLENT VERY GOOD / EXCELLENT GOOD GOOD GOOD
ADHESIVE PROPERTIES GOOD GOOD FAIR FAIR GOOD
RESILIENCE (HOT / COLD) EXCELLENT / EXCELLENT GOOD / GOOD VERY GOOD / GOOD FAIR / GOOD VERY GOOD / GOOD
PERMEABILITY TO GASES FAIR FAIRLY LOW FAIRLY LOW EXCELLENT LOW
DIELECTRIC STRENGTH EXCELLENT EXCELLENT EXCELLENT EXCELLENT GOOD
WATER RESISTANCE (ABSORPTION) GOOD EXCELLENT EXCELLENT EXCELLENT FAIR
FLAME RESISTANCE POOR POOR POOR POOR SELF-EXTINGUISHING
CHEMICAL RESISTANCE Acids bases Fair Good Fair Good Good Good Good Good Good Fair
SOLVENT RESISTANCE (20 C) Alcohol Acetone Benzene Good Fair Unsatisfactory Good Good Unsatisfactory Good Good Unsatisfactory Good Good Unsatisfactory Good Fair Unsatisfactory
FUEL RESISTANCE *ASTM FUEL B @ 40°C UNSATISFACTORY UNSATISFACTORY UNSATISFACTORY UNSATISFACTORY POOR
OIL RESISTANCE "ASTM OIL NO. 1 @20°C @100°C "ASTM OIL NO. 3 @20°C @100°C POOR UNSATISFACTORY UNSATISFACTORY UNSATISFACTORY POOR UNSATISFACTORY UNSATISFACTORY UNSATISFACTORY POOR UNSATISFACTORY UNSATISFACTORY UNSATISFACTORY POOR UNSATISFACTORY UNSATISFACTORY UNSATISFACTORY EXCELLENT GOOD GOOD FAIR
COMMON NAME HYPALON NITRILE SILICONE THERBAN VITON FLUOROSILICONE
CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE CHEMICAL NAME ABBREVIATION COST FACTOR HARDNESS RANGE
CHEMICAL NAME Chlorosulphonated Polyethylene CSM 3 40-85° Acrylonitrile Butadiene Copolymer NBR 2 40-100° Polysiloxane SI 6 20-80° Hydrogenated Acrylonitrile-Butadiene Rubber HNBR 8 50-95° Fluorinated Hydrocarbon FPM 15 50-95° Fluorinated Polysiloxane FSI 40 40-80°
COLOURS LIMITED RANGE LIMITED RANGE FULL RANGE FULL RANGE LIMITED RANGE LIMITED RANGE
HEAT RESISTANCE
(Maximum Continuous)
130°C / 160°C 100°C / 130°C 205°C / 300°C 140°C / 165°C 205°C / 260°C 180°C / 200°C
LOW TEMPERATURE RESISTANCE -25°C -20°C -60°C (Special Grades -60°C) -20°C -20°C -60°C
RESISTANCE TO OZONE & WEATHER EXCELLENT OUTSTANDING GOOD FAIR EXCELLENT OUTSTANDING EXCELLENT VERY GOOD OUTSTANDING OUTSTANDING EXCELLENT OUTSTANDING
PHYSICAL STRENGTH GOOD GOOD POOR GOOD GOOD GOOD POOR
COMPRESSION SET FAIR GOOD GOOD POOR GOOD GOOD GOOD GOOD
TEAR RESISTANCE GOOD GOOD POOR VERY GOOD GOOD POOR
ABRASION RESISTANCE FAIR GOOD POOR VERY GOOD GOOD POOR
ADHESIVE PROPERTIES FAIR GOOD FAIR TO GOOD GOOD GOOD POOR
RESILIENCE (HOT / COLD) FAIR GOOD GOOD GOOD GOOD FAIR FAIR FAIR FAIR FAIR FAIR GOOD
PERMEABILITY TO GASES GOOD POOR GOOD LOW FAIRLY LOW GOOD VERY LOW FAIRLY LOW
DIELECTRIC STRENGTH GOOD GOOD GOOD GOOD GOOD EXCELLENT
WATER RESISTANCE (ABSORPTION) VERY GOOD GOOD GOOD VERY GOOD GOOD GOOD
FLAME RESISTANCE SELF-EXTINGUISHING POOR GOOD POOR SELF-EXTINGUISHING SELF-EXTINGUISHING
CHEMICAL RESISTANCE Acids Bases VERY GOOD GOOD GOOD FAIR FAIR FAIR GOOD GOOD EXCELLENT FAIR GOOD FAIR
SOLVENT RESISTANCE (20°C) Alcohol Acetone Benzene GOOD FAIR UNSATISFACTORY GOOD UNSATISFACTORY UNSATISFACTORY GOOD FAIR UNSATISFACTORY EXCELLENT GOOD FAIR GOOD UNSUITABLE GOOD GOOD UNSUITABLE GOOD
FUEL RESISTANCE *ASTM FUEL B@ 40°C POOR FAIR UNSUITABLE GOOD EXCELLENT FAIR (GOOD AT LOW TEMPERATURES)
OIL RESISTANCE "ASTM OIL NO. 1 @20°C @100°C EXCELLENT GOOD EXCELLENT FAIR EXCELLENT GOOD EXCELLENT GOOD EXCELLENT GOOD EXCELLENT FAIR EXCELLENT EXCELLENT EXCELLENT EXCELLENT EXCELLENT 150°C EXCELLENT EXCELLENT 150°C EXCELLENT EXCELLENT 150°C EXCELLENT EXCELLENT 150°C EXCELLENT