| 摘要 |
PURPOSE: A back support is provided to prevent a sheet from being broken and burst by brittleness due to a temperature difference in the winter season. CONSTITUTION: On a core material(2) extruded into a predetermined shape, a PVC sheet(6) having a predetermined shape is adhesively formed on the front side, with reinforcing elastic materials(3) molded to a constant size each being arranged spaced at a constant interval on the front side, and PVC leather(4,5) having a predetermined shape each are formed on the front and rear ends, whereby the central PVC sheet(6) and the front and rear end PVC leather(4,5) are molded by vacuum adsorption and each of the circumferential portions is heat fused by a high frequency to form air courses of the same interval.
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