PROBLEM TO BE SOLVED: To provide a double layer plastic support with practicable strength, which is free from corrosion such as rust, is lightweight and easy to carry, by which work of attracting and tying a string or the like in agricultural work or the like can be simplified, and which, in waste disposal, can be recycled and reused as a raw material for manufacturing it without degrading quality.SOLUTION: In the plastic support whose external surface is a hard synthetic resin layer 3a and interior is a foamed synthetic resin body 3b, grooves are formed on the external surface vertically and obliquely downward with respect to the longitudinal direction at constant intervals. The plastic support can be reused as the raw material for the interior foamed synthetic resin body 3b by recycling in the waste disposal. Since the external surface is formed of the hard synthetic resin layer 3a, the plastic support is configured with a structure to always keep the quality constant.COPYRIGHT: (C)2013,JPO&INPIT【課題】実用的な強度を備え、軽量で持ち運びしやすく、農作業等において紐等の誘引、結束作業が簡素化でき、錆などの腐食が無く、廃棄処理は、リサイクルし、本発明の製造時に原料として再利用し、尚且つ、品質を損なわない、二層プラスチック支柱を提供する。【解決手段】外面を硬質合成樹脂層3a、内部を発泡合成樹脂体3bとした、プラスチック支柱において、外面に長手方向に対し、垂直かつ、斜め下方向に、溝が一定間隔をあけて形成し、廃棄処理はリサイクルにより、内部発泡合成樹脂体3bの原料に再利用し、外面を硬質合成樹脂層3aで成形することにより、常に、品質を一定に保つ構造を設けた構成とした。【選択図】図1
