Abrasion Resistance - Ability of elastomers to withstand mechanical action (such as rubbing, scraping, etc.)
Bashore Resilience - An ASTM test for the rebound characteristics of the elastomer. High bashore resilience generally implies low heat buildup in the urethane when used at high speeds under loads.
Chloroprene - The common name for the organic compound 2-chloro-1, 3 butadiene. It is used as a monomer for the production of the polymer polychloroprene, a type of synthetic rubber. Polychloroprene is better known to the public as Neoprene, the trade name Dupont gave it when the company first developed it and currently used by Dupont Dow Elastomers.
Coefficient of Friction (COF) - The ratio of the force required to move an object across a surface to the weight of the object.
Colorants - Dyes or pigments that provide color to elastomer.
Compression Set - The characteristic of an elastomer to return to its original state after deforming forces are removed.
Creep - Slow continued growth or lengthening of a material under a constant load.
Denier - The weight in grams per 9,000 meters of a particular reinforcement.
Density - Weight per unit volume of a substance.
Driven Pulley - The load-bearing pulley in the system that is directly powered by the belt.
Driver Pulley - The pulley in the system that supplies power directly to the belt.
DurometeR - The hardness of the final elastomer, or the gauge used to measure hardness.
Elastic Limit - The maximum stress to which a test specimen may be subjected and still return to its original length upon release of the load.
Elasticity - The property whereby a solid material changes its shape and size under the action of opposing forces, but recovers its original configurations when the forces are removed.
Elastomer - A natural or synthetic material which exhibits rubber-like properties of high flexibility.
EPDM - Ethylene-propylene-diene monomer rubber. A chemically cross-linked elastomer with good electrical insulating properties and excellent flexibility at high and low temperatures. It has good insulation resistance and dielectric strength, as well as excellent abrasion resistance and mechanical properties. EPDM has better cut-through resistance than Silicone rubber.
Hypalon - A trademark for a kind of synthetic rubber noted for its resistance to chemicals, temperature extremes, and ultraviolet light. It is a product of Dupont Dow Elastomers.
Hysteresis - A loss of energy due to successive deformation and relaxation.
Modulus - The slope of the line on a stressstrain curve. The slope is the ratio of stress to strain.
Polymer - A material, of either synthetic or natural origin, made of many repeating molecules.
Pulley Runout - The total deviation of a surface when rotated about an axis.
RMA - Rubber Manufacturers Association SLIP Occurs when the torque load in the system exceeds the frictional force provided by tension in a flat belt or Fenatrak belt.
Strain - The elongation of a specimen under load measured as a percentage of the original length.
Stress - The load per unit of original crosssectional area.
Synthetic - Not of natural origin; prepared or made artificially; "man-made."
Tear Resistance - Opposition of a material to a force acting to initiate and then propagate a failure at the edge of a test specimen.
Tear Strength (Split Strength) - A measure of tear resistance.
Tenacity - Break strength per unit of linear density.
Tensile Strength - The maximum tensile stress sustained by the specimen before failure in a tensile test.
Tension - A force tending to produce elongation or extension.
Total Indicator Reading (T.I.R.) - The value derived (high to low reading) by a dial indicator.
Yield Point - A point on the stress-strain curve at which there is a sudden increase in strain without a corresponding increase in stress.
