| 摘要 |
PURPOSE:To obtain a large sheet of synthetic resin suitable for use in the field of construction work by a method wherein weldable male and female pawls are provided at both sides of the sheet in the lengthwise direction thereof, a wing covering the connection between the sheets is formed at one side of the sheet and adjacent sheets are connected to each other through the pawls. CONSTITUTION:A weldable female pawl 3 is formed at one side of a long synthetic resin sheet 1, while a weldable male pawl 5 is formed at the other side of the sheet 1 at a position locating a little near to the center and a wing 6 is provided so as to cover the male pawl 5. Thus obtained sheet 1 is connected to another one by welding the respective female and male pawls 3, 5 and the edge of the wing 6 covering the connection there between is adhered to the adjacent sheet by an adhesive tape. By so doing, the large sheet can be easily obtained at the field of construction work. |
