| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a seamless tubular body, even any film thickness of which can be easily produced and which has excellent dimensional accuracy. SOLUTION: A polyamic acid solution is coated single-stratally or multistratally by discharging the polyamic acid solution in a thread through a nozzle with a circular opening on the outer peripheral surface of a columnar or cylindrical mold under the condition that the nozzle is fixed relative to the outer surface of the mold with a distance between the nozzle and the mold surface so as to adhere the discharged polyamic acid solution densely helically by moving the mold to the direction of its axis of rotation under its circumferential rotation. Finally, the resultant coated film is heated so as to harden or solidify the coated polyamic acid solution. COPYRIGHT: (C)2004,JPO |
