| 摘要 |
<p>The invention provides a manufacturing method of a polytetrafluoroethylene moulding, a manufacturing method of a polytetrafluoroethylene platelet, and the polytetrafluoroethylene platelet. By using the manufacturing methods, deformation degree can be inhibited from worsening when manufacturing time is shortened, or when the inhibited deformation degree is relatively small, the needed manufacturing time does not become longer. A cylindrical block obtained by compressing and maudlin the polytetrafluoroethylene power is heated to a temperature over a melting point and undergoes a first temperature reduction treatment, and then undergoes a second temperature reduction treatment in at a more stable speed than the first temperature reduction treatment, and then is cooled to obtain a crystallized temperature. The crystallized temperature of the block is the temperature that the crystallization of the block ends.</p> |
