| 摘要 |
PURPOSE: A bendable plastic cardboard is provided to easily wind a plastic corrugated cardboard sheet around a bobbin by forming a bent groove to be lined with a hollow part. CONSTITUTION: A bendable plastic cardboard comprises diaphragms(22), hollow parts(24a,24b,24c), and bent grooves(28). The diaphragms and the hollow parts are formed between an upper liner and a lower liner of a plastic corrugated cardboard at certain intervals. The bent grooves are formed on the upper liner and the lower liner to be parallel with the diaphragms and the hollow parts. The bent grooves are molded using a press molding machine with roll dies. |
