| 摘要 |
PURPOSE:To make a thermoplastic film stable for a long time and enable uniform heating even at a high temperature, by interposing steam into an interface between the thermoplastic film and a roll. CONSTITUTION:A thermoplastic film and roll are heated for a temperature rise by interposing steam between them. Hereupon, ceramics is excellent as the quality of the material of a heating roll. Furthermore, it is needless to say that the steam or water may be stuck onto the thermoplastic film besides a method to stick the water to the roll as an interposing method of the steam. In either case, it is good to constitute the title method so that the steam is interposed into an interface where the thermoplastic film and roll come into contact with each other. Although composition of the steam is water, a surface active agent may be added to the steam at need, however, a matter having volatility or subliming properties is good as the surface active agent. |
