| 摘要 |
<p>PURPOSE:To tense a wire under a high tension while avoiding the breakage of a wire and manufacture a thermoplastic resin film by a method wherein a means to measure the tension of the wire and regulate it to a predetermined tension is provided in a manufacturing device. CONSTITUTION:A sheet-like molten body 40, molten and extruded from a die 10, is cooled and solidified on the surface of a cooling drum 30. In the case of film making, a wire 20 is connected to a high voltage generating device and a high voltage is maintained in the wire. As a result, a high electric charge is induced on a film 40 and the film is adhered to a cooling drum or an opposing electrode. One end of the wire 20 is fixed at the fixing end 26 thereof while the other end is connected to a tension providing device 24 through a wire supporting fitment 28. A tension measuring means 22 is interposed between the other end of the wire and the tension providing device 24. A connecting part between the other end of wire and the tension measuring means 22 is insulated electrically. The wire will never be broken even when the tension is set at a value which is 90-95% of the critical strength of the wire under the tensed condition thereof and whereby a stable operation (manufacture of a film) may be effected.</p> |
