This is rubber that has been separated through physical and chemical processes in order to reuse rubber products such as tires and tubes that can no longer be used. The regeneration method involves first removing foreign objects other than rubber, such as cloth and metal fittings, washing the material with water, and then passing it through special rolls several times to turn it into fine powder. Next, in the desulfurization process, a regenerating agent and oils such as pine oil or mineral oil are added and the material is heated. Finally, in the finishing process, the material is thoroughly kneaded and the particles are crushed to give it plasticity and adhesiveness, resulting in regenerated rubber. Regenerated rubber is not returned to unvulcanized rubber, but the polymer chains are cut, so it has inferior mechanical properties and is rarely used alone. It is used in industrial rubber products such as automobile tires, belts, and hoses, as well as mats, footwear and shoe soles, and rubber-coated cloth. Historically, it is the oldest recycled resource. Powdered rubber is called recycled rubber and is used as a filler in asphalt pavement. [Kazuyoshi Fukuda] [Reference item] |©Shogakukan "> Types of Recycled Rubber ©Shogakukan "> An example of how recycled rubber is manufactured Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
使えなくなったタイヤやチューブなどのゴム製品を再利用するため、物理的および化学的処理を加えて分離したゴム。再生法は、まずゴム以外の布や金具などの異物を除き、水洗したのち特殊ロールを何回も通して細粉にする。次に脱硫工程で再生剤とパイン油や鉱油などの油を加えて加熱処理する。最後に仕上げ工程でよく練って粒子を擦りつぶし、可塑性と粘着性をもたせて再生ゴムとする。再生ゴムは、未加硫ゴムに戻ったのではなく、高分子鎖が切断しているので、機械的性質が劣り、単独で使用することは少ない。自動車タイヤやベルト、ホース等の工業用ゴム製品、マット、履物・靴底、ゴム引布などに使用されている。歴史的にもっとも古い再生資源である。細粉化ゴムはリサイクルゴムrecycled rubberといわれ、充填(じゅうてん)剤としてアスファルト舗装などに使われる。 [福田和吉] [参照項目] |©Shogakukan"> 再生ゴムの種類 ©Shogakukan"> 再生ゴムの製造方法の一例 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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