| abstract |
Provided is a method for producing a film having high film thickness accuracy even when a thermoplastic resin such as polyvinyl chloride or polyolefin, particularly a resin having a high melt viscosity and a low melt elongation is used as a material for producing the film. To do. A method of manufacturing a film containing a thermoplastic resin, the method comprising a material containing a thermoplastic resin, wherein the thermoplastic resin comprises a material having a pair of opposed flat portions. The process of supplying between a pair of rolls in a molten state, and rolling the pair of flat parts together with the pair of rolls, thereby fusing the flat parts together, Forming a unitary film, wherein the material supplied to the roll is two separate films with flat portions, or a pair of opposing flats with edges connected by a connection The method which is one flat cylindrical film which has an irregular part. [Selection] Figure 1 |