Hevea - Law Dictionary Search Results
Home Dictionary Name: heveaHevea
A small genus of South American trees yielding latex It includes the rubber tree Hevea brasiliensis originally found in South America but now used for production of rubber world wide...
Paraacute rubber
The caoutchouc obtained from the South American euphorbiaceous tree Hevea brasiliensis hence called the Paraacute rubber tree from the Brazilian river and seaport named Paraacute also the similar product of other species of Hevea It is usually exported in flat round cakes and is a chief variety of commercial India rubber...
Caoutchouc
A tenacious elastic gummy substance obtained from the milky sap of several plants of tropical South America esp the euphorbiaceous tree Siphonia elastica or Hevea caoutchouc Asia and Africa Being impermeable to liquids and gases and not readly affected by exposure to air acids and alkalies it is used especially when vulcanized for many purposes in the arts and in manufactures Also called India rubber because it was first brought from India and was formerly used chiefly for erasing pencil marks and gum elastic See Vulcanization...
VerbarSiphonia
A former name for a euphorbiaceous genus Hevea of South American trees the principal source of caoutchouc...
Rubber
Rubber, rubber is described in the Encyclopaedia Britannica, Volume 19, 1965 edition: Rubber the substance caoutchouc (q.v.), a milklike fluid that is obtained from certain tropical shrubs or tyres and then subjected to various processes of manufacture; or it may be a product of chemical synthesis. The uniqueness of rubber lies in its physical properties of extensibility and toughness. In its natural state, it is greatly affected by temperature, becoming harder when cooled (at 0 x-10 x C it is opaque) and softer when heated (above 50x C it becomes tackier and less elastic, decomposing into liquid form at 190 x-200x C). When vulcanized (i.e. heated with sulfur at 120 x-160 x C) it loses its thermoplasticity and becomes stronger and more elastic..... Chemically, rubber is a polymer of isoprene..... The term synthetic rubber is used to describe an evergrowing number of elastic materials, some of which closely resemble natural rubber while others have completely different physical properti...
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