About Harboro Rubber Engineering in Rubber      Contents      Introduction      Uses of Rubber      Processing Rubber      Designing With Rubber      Selecting / Specifying Rubber      Quality In Rubber      Rubber Directory      Health & Safety      Measuring Properties      Glossary of Terms          A-B          C-D          E-G          H-O          P-S          T-Z      Request A Copy Contact Information

E-G   ELASTOMER General term used to describe all natural and synthetic polymeric materials which have rubbery or "elastic" properties. ELECTRIC STRENGTH Describes the ability of a rubber to withstand high voltages. It is usually quoted in KV per mm of rubber thickness. (Link to Electric Strength properties EXTRUSION Producing continuous lengths of rubber with a constant profile by forcing it through a die under pressure and vulcanising it. Harboro does not specialise in this sector of the industry. FILLERS General term describing the bulk materials which are added to the rubber (usually as powders). FLASH Excess rubber found on mouldings as a result of the moulding process, but which does not form a part of the moulding itself. This does not usually include feed gates but refers particularly to thin films of rubber formed at tool split lines etc. FLEX CRACKING The tendency of some materials to crack as a result of repeated bending or stressing at the same point. FORMULATION The term used to describe a rubber "recipe".