Ebonite


Ebonite

:"This article details a type of plastic, for the manufacturer of bowling balls, see Ebonite International"

Ebonite is one of the earliest forms of plastic. A hard, rigid and shiny resin, it was intended as an artificial substitute for ebony wood. It is actually a very hard rubber first obtained by Charles Goodyear by vulcanizing rubber for prolonged periods. As a result, it is about 30% to 40% sulfur.

Applications

It is often used in bowling balls, smoking pipe mouthpieces, fountain pen nib feeds, and high-quality saxophone and clarinet mouthpieces. It is also commonly used in physics classrooms to demonstrate static electricity.

Hard rubber ('Ebonite' is a brand name that's not universally used) was used in the cases of automobile batteries for years, thus establishing black as their traditional color even long after stronger modern plastics were substituted. It is used in hair combs made by Ace, which survive, essentially unchanged, from the days of the US Civil War.

Properties

The material is brittle, which produces problems in its use in battery cases for example, where the integrity of the case is vital to prevent leakage of sulphuric acid. It has now been generally replaced by carbon black-filled polypropylene.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • ébonite — [ ebɔnit ] n. f. • 1862; angl. ebonite, de ebony « ébène » ♦ Matière noire, dure et cassante, obtenue par vulcanisation du caoutchouc, et utilisée pour ses propriétés isolantes avant l invention des matières plastiques organiques. ● ébonite nom… …   Encyclopédie Universelle

  • Ebonite — Ébonite C est au siècle dernier que Charles Goodyear obtint l ébonite en soumettant le caoutchouc à un processus prolongé de vulcanisation. Sa couleur proche de celle de l ébène est à l origine de son nom. Caoutchouc vulcanisé avec de 20% à 40%… …   Wikipédia en Français

  • ebonite — s. f. Borracha endurecida por vulcanização, muito escura, com alto teor de enxofre.   ‣ Etimologia: inglês ebonite, de ebon, ébano …   Dicionário da Língua Portuguesa

  • Ebonite — Eb on*ite, n. (Chem.) A hard, black variety of vulcanite. It may be cut and polished, and is used for many small articles, as combs and buttons, and for insulating material in electric apparatus. [1913 Webster] …   The Collaborative International Dictionary of English

  • ebonite — [eb′ə nīt΄] n. [ EBON(Y) + ITE1] HARD RUBBER …   English World dictionary

  • Ébonite — Charles Goodyear obtint l ébonite en 1839 en soumettant le caoutchouc naturel à un processus prolongé (et extrême) de vulcanisation. Sa couleur proche de celle de l ébène est à l origine de son nom. Son frère Nelson Goodyear la fait breveter et… …   Wikipédia en Français

  • ebonite — ebonitas statusas T sritis fizika atitikmenys: angl. ebonite; hard rubber; vulcanite vok. Ebonit, m; Hartgummi, m rus. эбонит, m pranc. ébonite, f; caoutchouc durci, m …   Fizikos terminų žodynas

  • ébonite — ebonitas statusas T sritis fizika atitikmenys: angl. ebonite; hard rubber; vulcanite vok. Ebonit, m; Hartgummi, m rus. эбонит, m pranc. ébonite, f; caoutchouc durci, m …   Fizikos terminų žodynas

  • ebonite — ebonitas statusas T sritis chemija apibrėžtis Natūraliojo kaučiuko vulkanizatas, turintis 30–60% sieros. atitikmenys: angl. ebonite; hard rubber; vulcanite rus. эбонит …   Chemijos terminų aiškinamasis žodynas

  • ebonite — noun Date: 1861 hard rubber especially when black …   New Collegiate Dictionary