JP2001087691A - Method and apparatus for continuously dyeing film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film dyeing method eliminating a problem such as inter mediate thinning, intermediate thickening or ending in a film and treating the film for a short time without using wasteful energy. SOLUTION: A dyeing tank 2 having a plurality of drive rollers 9a, 9b,... arranged to the upper and bottom parts thereof is filled with a dyeing soln. 11 and a washing tank 3 having a plurality of drive rollers 14a, 14b... arranged to the upper and bottom parts thereof is filled with water and a long film 6 is wound around the rollers 9a, 9b of the dyeing tank 2 to be dyed while zigzag sent up and down and subsequently wound around the rollers 14a, 14b... of the washing tank 3 to be washed while zigzag sent up and down and a fresh water shower is sprayed against the film at the outlet of the washing tank and waterdrops bonded to the surface of the film are removed by air blow to dry the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dyeing method and a dyeing apparatus for dyeing a film, for example, an acrylic film, a nylon film, a polyester film, etc., without any scratches and uniformly without dyeing spots.

[0002]

2. Description of the Related Art Conventionally, continuous dyeing of a very long series of films has not been performed, but a method of processing a batch of a predetermined length of film using a jigger dyeing machine is performed. . However, since this dyeing method has a winding step, problems such as medium rare, medium darkness and ending occur, and uniform and stable dyeing cannot be performed. In batch dyeing, the dyeing solution is discarded each time,
The washing process has to be repeated.

[0003] Accordingly, a large amount of dye is required, and a large amount of heat is required because the processing solution must be heated each time. Further, the contact between the films causes scratches on the surface and causes staining spots. Of course, it takes a long time for dyeing to repeat dyeing and washing with water, and the productivity is never good.

[0004]

As described above, the conventional batch-type film dyeing has the above-mentioned problems. The problem to be solved by the present invention is these problems, and it is possible to eliminate the problem of neutrality, darkness, ending, etc. in the film to be dyed without wasting energy, and to process the film in a short time. The present invention provides a method and an apparatus for dyeing a film capable of producing a film.

[0005]

The continuous dyeing apparatus of the present invention comprises a film unwinding machine, a dyeing tank, a washing tank, an air blow dryer, and a winding machine. Then, a predetermined tension is applied to the film wound on the roll of the unwinding machine, the film is unwound without being bent, and guided to the dyeing tank. The dyeing tank is filled with the dyeing solution, and a stock solution of the dyeing solution is supplied so that the concentration of the dyeing solution does not change, and is circulated by a circulation pump. Here, a plurality of drive rollers are arranged at the top and bottom of the dyeing tank, and the film is fed to these drive rollers and dyed while being sent in a vertical zigzag shape.

The dyed film is sent to an adjacent washing tank to be washed with water. The film is fed by a plurality of driving rollers arranged at the top and bottom of the washing tank filled with water, and is moved up and down. It is washed while proceeding in a zigzag manner.
The film coming out of the washing tank passes through an air blow dryer to remove water droplets adhering to the surface. Then, the dried film is wound up by a roller of a winder. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0007]

1 shows an embodiment of a continuous dyeing apparatus for a film according to the present invention. In FIG. 1, 1 is an unwinder, 2 is a dyeing tank, 3 is a washing layer, 4 is an air blow dryer, Reference numeral 5 denotes a winder. The dyeing device passes through a series of steps from the unwinder 1 to the winder 5, so that the transparent film 6 is dyed in a predetermined manner.

The unwinding machine 1 is provided with an unwinding roller 7, and the film 6 wound around the unwinding roller 7 is in a state where a predetermined tension is applied so that the film 6 does not stick. Sent out by. Means for applying tension to the film 6 is not particularly limited. For example, by providing the unwinding roller 7 with a brake device, it is possible to apply a constant rotational torque.

The film 6 unwound from the unwinding machine 1 is fed to a feed roller 8a, the direction of which is changed downward, and sent to the dyeing tank 2. A plurality of rollers 9a, 9
are arranged at the top and bottom, and the film 6 is fed into these rollers 9a, 9b, 9c... in a zigzag manner. Each of the rollers 9a, 9b, 9c,... Is driven so that its rotation speed becomes constant.
Are filled with a dye solution, and rollers 9a, 9b, 9c
The film surface is dyed while moving in zigzags up and down while being wound around.

The dyeing solution 11 is filled in the dyeing tank 2 and its level is higher than the upper rollers 9b, 9d..., So that the film 6 does not come into contact with air during the dyeing process, and small air bubbles adhere to the film surface. Can be prevented, and contact between films in the dyeing solution can be avoided.
The film 6 is wound around each of the rollers 9a, 9b, 9c,... And moves in a zigzag manner in the upper and lower directions, so that the film 6 always comes into contact with a new dyeing solution, so that there is no spot.

The dyeing liquid 11 is circulated by a circulating pump 10 provided so that the concentration of the dyeing liquid filled in the dyeing tank 2 becomes uniform throughout the tank.
That is, the staining liquid 11 derived from the bottom of the staining tank 2 is
The water is discharged from the pipe 12 provided above the surface of the dyeing solution by showering. There is a case where the pipe 12 is arranged in the liquid and the liquid is jetted in the liquid.

To prevent the concentration of the staining solution 11 from decreasing, a staining solution preparation tank 13 is provided, and a stock solution of the staining solution having a high concentration is sent out together with the staining solution 11 to the staining tank 2 by the circulation pump 10. A heater 17 is attached to the bottom of the dyeing tank 2 to heat the dyeing tank 2 from below and to heat the dyeing liquid 11 and jet it from the pipe 12. Here, the heater 17 may be a steam heater or an electric heater.

The film 6 coming out of the dyeing tank 2 is sent to a feed roller 8b, and is sent to the washing tank 3 with its direction changed. Rollers 14a, 14b... Are arranged at the top and bottom of the washing tank 3, and the inside is filled with water.
Progresses in a vertical zigzag manner while being wound around the rollers 14a, 14b,..., And excess undyed material on the surface is washed away. A fresh water shower 15 is provided at the outlet of the washing tank 3, and washing is performed again with fresh water spouting from the shower 15.

An air blow dryer 4 is provided above the shower unit 15, and water drops remaining on the surface are removed by passing through the air blow dryer 4. Then, the film 6 wound around the feed roller 8c and the direction thereof is changed is wound around the winding roller 16 of the winding machine 5. The outline of the dyeing apparatus of the present invention is as described above,
Through this series of steps, the surface of the film 6 is dyed. Here, each specific device is not limited and can be freely configured.

FIG. 2 shows a specific example of the air blow dryer 4. The air blow dryers 4, 4 are arranged on both sides of the film 6. The air blow dryer 4 is a cylindrical body having a square cross section with both ends closed. A narrow gap 20 is provided in the front of the cylindrical body 18 in the longitudinal direction, and air is blown out from the gap 20. The air is supplied from a pipe 21 connected to the cylinder 18, and the air injected from the gap 20 is not perpendicular to the film surface but in a slightly inclined direction.

FIG. 2B is a sectional view taken along the line AA of FIG.
(c) is an enlarged view of a portion B in (b), and shows a gap 20 from which air is jetted. Here, θ = 95 degrees,
Since the air is blown slightly obliquely to the film surface, the attached water droplets can be completely removed.

As described above, the continuous film dyeing apparatus and the method for dyeing a film according to the present invention send the film in a zigzag manner up and down to a plurality of rollers arranged at the top and bottom of the dyeing tank. It is wound around a plurality of rollers arranged at the top and bottom and washed while moving, and then wound around a winding roller with water drops removed by air blow, and the following effects are obtained. Can be done.

[0018]

The dyeing apparatus of the present invention comprises an unwinder, a dyeing tank,
A washing tank, a drier, and a winding machine are provided.The film unwound from the unwinding roller of the unwinder passes through the dyeing tank, the washing tank, and the drier, and is subjected to a predetermined dyeing. It is wound on a winder. Therefore, even a very long film is continuously dyed, and the dyeing efficiency is extremely high.

A plurality of rollers are arranged at the top and bottom of the dyeing tank, and the film is fed into these rollers and moves in a zigzag manner in the up and down direction. No scratches occur. Also, since all rollers are below the surface of the dyeing solution, the film does not come into contact with air during the dyeing process, and no small air bubbles adhere to the film surface. Further, since the film is wound around each roller and moved, the film can always come into contact with a new dyeing solution, and defects such as medium rare, medium dark and ending can be eliminated. On the other hand, the dyeing tank is provided with a dyeing liquid preparation tank, which is adjusted so that the concentration does not become low, and the dyeing liquid is kept at a predetermined temperature by a heater.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a film dyeing apparatus of the present invention.

FIG. 2 is an air blow dryer for removing water droplets attached to a film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unwinder 2 Dye tank 3 Rinse tank 4 Air blow dryer 5 Winder 6 Film 7 Unwind roller 8 Feed roller 9 Roller 10 Circulation pump 11 Dye liquid 12 Pipe 13 Dye liquid preparation tank 14 Roller 15 Shower 16 Take-up roller 17 Heater 18 Tube 19 Front 20 Clearance 21 Pipe

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D075 AB32 AB54 BB65Z DA04 DB31 EA05 4F040 AA22 AC02 BA50 CC02 CC06 CC07 DB10 DB18

Claims (4)

[Claims] 1. A method for dyeing a film surface, wherein a dyeing tank in which a plurality of drive rollers are arranged on an upper portion and a bottom portion is filled with a dyeing solution, and a washing tank in which a plurality of drive rollers are also arranged on an upper portion and a bottom portion. Is filled with water, and a series of long films are wound around each roller of the dyeing tank, and are sent up and down zigzag with the rotation of the rollers, and then wound around the rollers of the washing tank and washed while being sent up and down zigzag. A continuous dyeing method for a film, characterized in that a fresh water shower is sprayed at an outlet, and the film is dried by an air blow to remove water droplets adhering to the surface. 2. A method for dyeing a film surface, wherein a dyeing tank in which a plurality of drive rollers are arranged on an upper portion and a bottom portion is filled with a dyeing liquid, and a plurality of drive rollers are also arranged in an upper portion and a bottom portion. Is filled with water, a series of long films are wound around each roller of the above-mentioned dyeing tank, and are sent in a zigzag manner with the rotation of the rollers. To maintain the concentration of the dyeing solution at a constant level, and to control the temperature of the dyeing solution with a heater to maintain the temperature of the dyeing solution. The dyed film is then wound around the rollers of the washing tank and zigzag up and down. The film is sprayed and sprayed at the outlet, and sprayed and dried by air blow to remove water droplets adhering to the surface at the outlet. Sequencing method. 3. An apparatus for dyeing a film surface, comprising an unwinding machine, a dyeing tank, a washing tank, an air blow dryer, and a winding machine, wherein the unwinding machine has an unwinding roller and is wound. Send out the film so that it does not stick,
At the top and bottom of the dyeing tank, a plurality of rollers rotating at the same speed are arranged and filled with the dyeing solution, and the film is fed by these respective drive rollers and can advance in a vertical zigzag manner. Rollers rotating at the same speed are arranged at the top and bottom of the washing tank, and the water is filled.At the same time, the film is fed by each drive roller and washed while moving up and down zigzag. A continuous film dyeing apparatus comprising: 4. The dyeing tank is provided with a dyeing solution mixing tank containing a stock solution of the dyeing solution for increasing the concentration of the dyeing solution when the concentration of the dyeing solution is lowered, and the dyeing tank is heated by heating the dyeing solution. 4. The continuous film dyeing apparatus according to claim 3, further comprising a vessel.