| 摘要 |
PROBLEM TO BE SOLVED: To prevent the contamination generated within a tenter and to remove a generated contaminant by providing heating parts in the clips of the tenter in forming a cellulose triacetate film by using a soln. casting method using the tenter. SOLUTION: When a cellulose triacetate film is formed by a soln. casting method using a tenter, the clips 20 of the tenter have heating parts 21 built therein. The heating parts 21 built in the clips 20 are heat generators emitting heat upon energization and, for example, composed of nichrome wires. The heating parts 21 are built in both of a fixed stand 12 and the shoe 11 holding the film from above and heat a web 1 from both upper and lower surfaces thereof to carry the web 1. The heating parts 21 built therein are only built in the fixed stand and the fixed stand generates heat to transmit the same to a pin. |
