JP2002086079A - Equipment for improving drying capacity of liquid cleaning apparatus for film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic film drying apparatus which removes and dries adhered liquid on the surface of the film quickly after cleaning in a liquid cleaning process of the plastic film, in which dust and waste adhered on surface of the film are removed by the liquid. SOLUTION: By enclosing the whole plastic film drying apparatus, increasing the temperature of the atmosphere in the apparatus, and making the surface temperature of a guide roll in the apparatus equivalent to the temperature of a drying atmosphere, heat is give efficiently to the plastic film the surface of which is wet to accelerate drying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus for efficiently drying a liquid component on a film surface.

[0002]

2. Description of the Related Art After washing a plastic film with a liquid, the drying equipment is generally nipped with a rubber roll, roughly drained, and blown with hot air using a nozzle to remove residual liquid (drying). )Was.

[0003]

In the drying equipment of the prior art, when the processing speed is increased, the liquid on the film surface cannot be removed. The liquid that has not been completely removed will remain on the film surface as white spot-like defects when subjected to high-temperature treatment in the next step.

Accordingly, the present inventors have conducted intensive studies with the aim of solving the above-mentioned conventional problems and providing a plastic drying equipment capable of effectively removing the liquid component on the film surface. It was reached.

[0005]

Means for Solving the Problems In a drying step of a plastic film surface for cleaning the surface of a plastic film with a liquid and then removing and drying the liquid adhering to the plastic film, a curtain or a plate surrounding the entire drying step is provided.

Further, a guide roll for constantly maintaining a surface temperature equivalent to the ambient temperature in the drying step is provided in the drying step. As an example of a facility for heating the guide roll, a facility that sucks air in a drying facility and blows air to the guide roll using a nozzle to make the surface temperature of the guide roll equal to the ambient temperature. Conceivable.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plastic film drying facility according to the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the present invention accompanies a plastic film liquid cleaning facility, and includes a nip roll 12 for draining and an air nozzle 13 for blowing hot air, which is a conventional technique. Curtain 14
Or, it is composed of the surrounding plate 24, the guide roll 15 and the guide roll heating nozzle 16.

The curtain 14 or the surrounding plate 24 is a preferred example of the heat insulating material for shielding the entire drying process in the present invention. It is sufficient that the heat insulating material has a function of partitioning the entire drying process from outside the system. By shielding the entire drying process, the ambient temperature in the drying process, in particular,
The temperature of the atmosphere above the nip roll for draining can be increased, thereby effectively removing moisture adhering to the plastic surface.

[0010] Further, any equipment for heating the guide roll may be used as long as it can raise the surface temperature of the guide roll. For example, a method in which warm air is applied to the guide roll shown in FIG. The cleaning equipment in FIG. 1 performs brushing with a rotating brush roll 11 while spraying a cleaning liquid from a spray nozzle 10 onto a processing film. The present invention accompanies the liquid cleaning equipment, but is not limited to the cleaning method as shown in FIG.

The cleaning liquid applied to the present invention is not limited.
The drying temperature condition may be appropriately determined in consideration of the boiling point of the cleaning solution used and the heat resistance of the plastic used.

The processing speed is not particularly limited, and the running speed of the plastic is 1 to 1 in consideration of actual use.
8 m / min is preferred.

The washing liquid used in the present invention may be water or an organic solvent such as an alkali, an alkene, an alcohol, a ketone, an ether, a carboxylic acid, an aldehyde, or an amide. 2
It refers to those used as a mixture of more than one type.

The temperature during the drying step is not particularly limited, and may be set to a temperature between the melting point and the boiling point of the liquid used.

The plastic film applied to the present invention is a conventionally known plastic film, for example, any one of a fluorine resin film, a polyethylene terephthalate (PET) film, a polyarylate film, a polypropylene (PP) film, a polyimide film and the like. Including.

Although the embodiments of the drying apparatus for liquid cleaning of a plastic film according to the present invention have been described above, the present invention is not limited only to these embodiments. The present invention is based on the knowledge of those skilled in the art without departing from the spirit thereof,
The present invention can be implemented with various improvements, changes, and modifications.

[0017]

EXAMPLES Examples and comparative examples will be specifically described below, but the present invention is not limited to these examples and comparative examples.

The evaluation was made based on the number of water droplets remaining on the film surface after the drying treatment. Specifically, the length after drying is 10
The number of 0 m film surface water droplet marks was inspected and evaluated using a defect inspection apparatus. AIS-60, AIS-60 as a defect inspection device
4V3 was used. As the inspection capability, a foreign substance having a size of about 400 μm can be detected.

(Example 1) As the equipment of the present invention, the equipment shown in Fig. 1 was used. The equipment shown in FIG. 1 includes a curtain 14 surrounding the entire drying equipment of the present invention and a guide roll 15 whose temperature is controlled.
And a heating nozzle 16 for controlling the temperature of the guide roll.

As a film to be treated, a polyimide film having a width of 12.5 μm and a width of 1.5 m was used. While running the film at 18 m / min, first, water was removed by the nip roll 12, hot air was blown by the air nozzle 13 having a hot air temperature of 100 ° C., and then the temperature was adjusted by the guide roll heating nozzle 16. The drying process was completed through the guide roll 15.

As a result, the atmosphere above the draining nip roll 12 was 64 ° C., the surface temperature of the guide roll after the air nozzle 13 was 60 ° C., and there were no water droplet marks on the surface of the treated film.

Example 2 The equipment shown in FIG. 2 was used as the equipment of the present invention. The equipment shown in FIG. 2 has a plate 24 surrounding the entire drying equipment of the present invention, a guide roll 25 whose temperature is adjusted, and a heating nozzle 26 for adjusting the temperature of the guide roll.

As a film to be treated, a polyimide film having a width of 12.5 μm and a width of 1.5 m was used. While running the film at 18 m / min, first, draining was performed by the nip roll 22, hot air was blown by the air nozzle 23 having a hot air temperature of 100 ° C., and then the temperature was adjusted by the guide roll heating nozzle 26. The drying process was completed through the guide roll 25.

As a result, the atmosphere above the draining nip roll 22 was 65 ° C., the surface temperature of the guide roll after the air nozzle 23 was 60 ° C., and there was no water droplet mark on the surface of the treated film.

(Comparative Example) The conventional equipment shown in FIG. 3 was used. A polyimide film having a width of 12.5 μm and a width of 1.5 m was used as a film to be processed. While running the film at 18 m / min, first, draining was performed by a nip roll 32, hot air was blown by an air nozzle 33 having a hot air temperature of 100 ° C., and then drying was completed through a guide roll 34.

As a result, the atmosphere above the draining nip roll 32 was 45 ° C., the surface temperature of the guide roll after the air nozzle 33 was 41 ° C., and there were four water droplet marks on the surface of the treated film.

(Summary of Results) Table 1 shows the temperature data of Examples 1, 2 and Comparative Examples, and Table 2 shows the inspection results of water droplet marks on the film surface.

[Table 1]

[Table 2]

[0028]

As described above, the present invention effectively removes moisture attached to the plastic surface by adding means for increasing the ambient temperature to the conventional equipment and means for increasing the surface temperature of the guide roll in the drying equipment. be able to.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a film liquid cleaning apparatus including a drying facility according to the present invention.

FIG. 2 is a side view showing one embodiment of a film liquid cleaning apparatus including a drying facility according to the present invention.

FIG. 3 is a side view showing one embodiment of a film liquid cleaning apparatus including a conventional drying facility.

[Explanation of symbols]

 10; spray nozzle 11; brush roll 12; nip roll 13; air nozzle 14; surrounding curtain 15; guide roll 16; guide roll heating nozzle 20; spray nozzle 21; brush roll 22; nip roll 23; Guide roll 26; guide roll heating nozzle 30; spray nozzle 31; brush roll 32; nip roll 33; air nozzle 34;

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F26B 3/04 F26B 3/04 13/08 13/08 A 13/10 13/10 C 13/18 13/18 A F Term (reference) 3B116 AA08 AB13 AB42 BA02 BA14 BB23 CC03 CD31 3B201 AA08 AB13 BA02 BA14 BB23 BB92 BB95 CB12 CB25 CC12 3L113 AA02 AB02 AC01 AC32 AC48 AC67 BA28 CA08 CA20 CB01 CB21 DA10 DA24 4F073 EA25 BA21 BA08 EA23 EA24 EA36 EA41 4F201 AG01 AJ13 AK01 AK07 AK14 AM25 BA04 BC02 BC13 BC33 BN05 BN25 BN27 BQ40 BQ53

Claims (4)

[Claims] 1. A drying step for washing a surface of a plastic film with a liquid, and thereafter removing and drying the liquid adhering to the plastic film, wherein the entire drying step is covered with a heat insulating material. Facility. 2. The drying equipment according to claim 1, wherein the heat insulating material is in a shape of a curtain or a plate. 3. A guide roll which constantly and stably maintains a surface temperature equivalent to the ambient temperature in the drying step.
Or the drying equipment according to 2. 4. The air conditioner according to claim 3, wherein the air in the drying equipment is sucked in, and the surface temperature of the guide roll is made equal to the ambient temperature by blowing air to the guide roll using a nozzle. Drying equipment.