| 摘要 |
A film, whose a glass transition temperature of a polymer is Tg, is heated so as to satisfy a formula, (Tg-90)<=T<=(Tg-30). The heating is made by feeding a warm air from a duct to the film. Temperature and flow rate of the air from the duct are controlled. The trimming is made by a shearing slitter. Further, if a distance from a heating position by the warm air to a slitting position of the shearing slitter is from 10 mm to 200 mm, no trimming dusts and the powdery materials are not adhered to a product part of the obtained film, and the slitting of the film forms adequate edges of the product part.
|
