液体1トンコンテナー等大型タンク用ポリエチレン内袋メーカー。1979年工場ニーズから内袋を開発、以降内袋標準仕様タンクの製造開始等により普及。現在各種タンクジョイントのラインアップにより国内のほとんどのコンテナに装着可能。
Sanko is a manufacturer of polyethylene inner bags for large tanks such as liquid 1-ton containers. The first inner bag was developed in 1979, in response to manufacturing needs. Polyethylene inner bags have become increasingly popular as a result of the production of standard specification tanks, for example. Presently, the inner bags can be installed in most containers in Japan because of the standardized lineup of various tank joints.