JPS6139891B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film manufacturing method using a roll coater, in which a film forming material 1 dissolved in a solvent is applied to the base end side of a moving belt conveyor 3 by a roll coater 2. Then, the film forming material 1 is suctioned through a plurality of suction holes 4 formed in the belt conveyor 3 to remove the solvent while adsorbing the film forming material 1 to the belt conveyor 3, and then the film 5 produced on the tip side of the belt conveyor 3 is rolled up. The present invention relates to a method of manufacturing a film using a roll coater, which is characterized in that the film is coated with a roll coater.

Conventionally, synthetic resin films have been manufactured by the T-die method, inflation method, calendar method, etc., but these methods have difficulty producing thin films, especially when the film molding material is in a molten state. If the film is brittle, it has the disadvantage that it is not possible to produce a thin film.

The present invention eliminates the above-mentioned drawbacks,
The purpose of this is to easily produce thin films by removing the solvent while adsorbing the film forming material applied to the belt conveyor, and because the manufacturing method is simple. is cheap and
In addition, since the solvent is removed while the film forming material is adsorbed onto the belt conveyor, the produced film does not become partially separated from the belt conveyor, causing wrinkles, scratches, or changes in thickness, producing a uniformly thin film. To provide a method for producing a film using a roll coater, which can easily produce a thin film even when the film forming material is brittle in a molten state since there is no need to melt the film forming material. It is in.

The present invention will be explained in detail below by means of illustrated embodiments. The belt conveyor 3, which is disposed approximately horizontally, is formed by bendably connecting a plurality of block pieces 6 made of metal such as stainless steel, which has good release properties for the film 5. As shown in Figure 2, a plurality of suction holes 4 are drilled, and directly under each suction hole 4, film forming material 1 or film 5 is placed.
A vacuum nozzle 7 for suctioning is provided. A roll coater 2 is disposed above the base end side of the belt conveyor 3 with a small gap therebetween so as to be able to move toward and away from the belt conveyor 3, and on the side of the roll coater 2, a roll coater 2 is provided to coat the belt conveyor 3. A doctor knife 8 is provided for adjusting the thickness of the film molding material 1. A drying oven 9 or a cooling chamber is provided above the approximate center of the belt conveyor 3 with a small gap therebetween, and a presser roll 10 is provided at the top of the leading end side of the belt conveyor 3 in the direction of movement. A winding machine 11 is disposed at each of the winders. After dissolving a film forming material 1 such as Poval in an organic solvent such as vinyl acetate, the film forming material 1 in the form of a solution is supplied to a roll coater 2 rotating in the direction of the arrow, and then rolled with a doctor knife 8. The thickness of the film forming material 1 on the surface of the coater 2 is adjusted and the film forming material 1 is continuously coated onto a moving belt conveyor 3 to a uniform thickness. The film forming material 1 is suctioned from each suction hole 4 by the vacuum nozzle 7 and applied onto the belt conveyor 3, and the film forming material 1 is moved directly below the drying oven 9 while being adsorbed onto the belt conveyor 3.
Next, the solvent is removed by evaporation from the solution film forming material 1 by heating in a drying oven 9, and then transferred to a belt conveyor 3.
After forming the film 5 on the top, the film 5 is further moved to the presser roll 10 side while being sucked onto the belt conveyor 3 by the vacuum nozzle 7.
While pressing the top surface of the film 5, the film 5 is continuously wound into a roll by the winder 11. As described above, the film forming material 1 dissolved in the solvent is applied to the base end side of the moving belt conveyor 3 by the roll coater 2, and then sucked through the plurality of suction holes 4 drilled in the belt conveyor 3 to form the film. Since the solvent is removed while adsorbing the material 1 onto the belt conveyor 3, a thin film 5 is placed on the belt conveyor 3.
Since the thin film 5 can be easily produced and the manufacturing method is simple, the produced thin film 5 is inexpensive. Moreover, since the film 5 is moved while adsorbing onto the belt conveyor 3, the produced thin film 5 will not be partially separated from the belt conveyor 3, wrinkled, damaged, or have a uniform thickness. A thin film 5 can be manufactured. Furthermore, since the film forming material 1 dissolved in a solvent is applied onto the belt conveyor 3 by the roll coater 2, there is no need to melt the film forming material 1 in order to manufacture the film 5, and the brittle film forming material 1 is melted in a molten state. There is no need to
Even if the film forming material 1 is brittle in a molten state, a thin film 5 can be easily produced.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an embodiment of the manufacturing apparatus used in the present invention, and FIG. 2 is a partial perspective view of the same belt conveyor, in which 1 is a film forming material, 2 is a roll coater, and 3 is a belt conveyor. , 4 is a suction hole, and 5 is a film.

Claims (1)

[Claims] 1. A film forming material dissolved in a solvent is applied to the base end of a moving belt conveyor using a roll coater, and then the film forming material is sucked into the belt conveyor by suction through a plurality of suction holes drilled in the belt conveyor. A method for manufacturing a film using a roll coater, characterized in that after removing the solvent, the film produced at the leading end of a belt conveyor is rolled up.