Last Updated2-3-2013Rubber tree (He

Last Updated2-3-2013
Rubber tree (Hevea brasiliensis), South American tropical tree of the spurge family (Euphorbiaceae). Cultivated on plantations in the tropics and subtropics, especially in Southeast Asia and western Africa, it replaced the rubber plant in the early 20th century as the chief source of natural rubber. It has soft wood; high, branching limbs; and a large area of bark. The milky liquid (latex) that oozes from any wound to the tree bark contains about 30 percent rubber, which can be coagulated and processed into solid products, such as tires. Latex can also be concentrated for producing dipped goods, such as surgical gloves.

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最后updated2-3-2013
橡胶树（Hevea brasiliensis），大戟科的南美热带树（大戟科）。在热带、亚热带人工林栽培，尤其是在南洋和非洲西部，它取代了上世纪第二十年代初的橡胶厂作为天然橡胶的主要来源。它具有软木材；高，分枝的四肢；和大面积的树皮。乳状液（乳胶），出任何伤口的树皮中含有约百分之30的橡胶，它可以凝固和加工成固体产品，如轮胎。乳液也可以集中用于生产浸渍制品，如外科手术手套。