JPH06101179A - Method for continuously dyeing cylindrical knitted fabric - Google Patents

Abstract

PURPOSE:To eliminate the edge marks of a cylindrical knitted fabric in the continuous dyeing method of a dipping and nipping style. CONSTITUTION:The method for continuously dyeing the cylindrical knitted fabric by continuously allowing the cylindrical knitted fabric to travel in a dyeing solution filled between a pair of squeezing rollers and subsequently dipping and nipping the dyeing solution is characterized by not giving a tension to the knitted fabric in its traveling direction or positively feeding the knitted fabric to form a non-tension state in the dipping and nipping process. The method eliminates edge marks, i.e., irregular dyeing, generated in the selvages of the cylindrical knitted fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous dyeing method for a tubular knitted fabric, and is particularly intended to eliminate edge marks.

[0002]

2. Description of the Related Art Conventionally, the applicant of the present invention has a Japanese Patent Publication No. 48-6.
No. 430 and Japanese Patent Publication No. 1-484525 disclose continuous dyeing methods for tubular knitted fabrics. The present invention relates to such a continuous dyeing method, and in particular, provides a novel processing method in which an edge mark generated on a material to be dyed is eliminated.

In a continuous dyeing method in which a solution of a reactive dye or the like is filled between a pair of squeezing rollers, a tubular knitted fabric is continuously run, and a dyeing liquor is dipped and nipped, in particular, an ear portion of the knitted fabric. That is, stains called edge marks occur at both ends in the traveling direction. It is thought that such edge marks are caused by the thickness of the ears being different from the other parts when the tubular material is nipped, and depending on the squeezing condition, that part may become darker or lighter. Occurs.
Conventionally, attempts have been made to solve such problems by selecting the squeezing ratio, dyes, auxiliaries, etc., but this has not been solved fundamentally, and this is the practical application of continuous dyeing with extremely high productivity. It is one of the causes of the inhibition.

[0004]

SUMMARY OF THE INVENTION The present invention provides a method for solving this problem.

[0005]

That is, the present invention is a continuous dyeing method for a tubular knitted fabric in which a knitted fabric is continuously run in a dye liquor filled between a pair of squeezing rollers to dip and nip the dye liquor. At the time of dipping and nipping, the knitted fabric to be fed is not tensioned or is in a positive feeding state, and the knitted fabric is treated in a tensionless state.

[0006]

[Function] Although the reason why such a problem is solved has not been fully clarified, it is considered that the factors such as the tension of the knitted fabric and the diffusion of the dye, or the drawing pressure are related to each other. It solves the problems that were previously considered difficult.

[0007]

EXAMPLES Hereinafter, description will be made based on the exemplified examples. FIG. 1 is a side view illustrating an apparatus for carrying out the present invention,
The tubular knitted fabric 1 includes guide rollers 2 and 3, a fabric feeding device 4,
It continuously runs between a pair of pressurized squeezing rollers 5 and 5 and is continuously dipped in the dyeing solution 6 stored between the rollers 5 and 5 and is nipped by the squeezing rollers 5 and 5 continuously. A dye liquor is applied and dyed. Aperture rollers 5, 5
As shown in FIG. 2, both ends are sealed by the side seal devices 7 and 7, and the dye solution is stored. The present invention is
In such a dip, nip method continuous dyeing method,
It is characterized in that when the knitted fabric is dipped and nipped, it is carried out in a tensionless state or in a positive feed (overfeed) state. For example, the mechanism is the fabric feeding device 4 shown in FIG. 2, that is, the inner conveyance which is arranged at both inner ears of the tubular knitted fabric and includes a plurality of guide rollers 11 and an endless belt 10 stretched around the rollers. It is carried out by a dough feeding device and a dough feeding device composed of a combination of drive rollers 8 and 9 which are pressed against the endless belt 10 through the knitted fabric and are rotated by receiving power from a drive source though not shown. By making the feed speed of the drive rollers 8 and 9 equal to or faster than the speed of the squeezing rollers 5 and 5, a positive feed state is obtained, and tension in the traveling direction of the knitted fabric is eliminated. The transfer mechanism has a mechanism shown in FIG. 3 in which both ends of the knitted fabric are nipped and moved by a pair of rotating rollers 13 while being spread by a known ring guide 12, or devised by the applicant. The feeding devices disclosed in Japanese Utility Model Publication No. 61-2711, Japanese Utility Model Publication No. 14712, etc. can also be used. Also,
Although such a fabric feeding mechanism is installed vertically to the fabric moving direction in FIG. 1, it may be installed horizontally between the guide rollers 2 and 3.

A specific example of the mechanism shown in FIG. 2 will be shown below. Knitted fabric used: tubular milling knitted fabric knitted with cotton yarn of 40 count Dye composition: reactive dye 3 g / l solution adjusted to pH 11.5 Squeezing condition: squeezing roll hardness 70 °, squeezing pressure 1 0.5 kg
/ Cm ² Fabric transfer speed: 40 to 42 m / min Squeezing roll rotation speed: 40 m / min Additional tension: None Under the above conditions, the dye liquor filled between the squeezing rollers is continuously dipped and nipped In comparison with the case where the cloth is transferred simply by rotating the squeeze roll, the latter case causes continuous white spots on both ears, but does not cause spots at all.

[0009]

As described above, according to the present invention, it is possible to eliminate the occurrence of edge marks, which is a drawback of the conventional continuous dyeing of the dip and nip method, and to realize the practical continuous dyeing with extremely high productivity. It was done. In particular, the method of the present invention is effective for a milling tubular knitted fabric and a plain cloth tubular knitted fabric using a fine count cotton thread, which has been difficult to carry out conventionally.

[Brief description of drawings]

FIG. 1 is a side view illustrating a device applied to the present invention.

FIG. 2 is a front view showing a main part of FIG.

FIG. 3 is a front view showing another example of the fabric feeding device.

[Explanation of symbols]

 1 tubular knitted fabric 2 guide roller 3 guide roller 4 fabric feeding device 5 squeezing roller 6 dyeing liquid 7 side sealing device 8 driving roller 9 driving roller 10 endless belt 11 rotating roller 12 ring guider 13 rotating roller

Claims (1)

[Claims] 1. In a continuous dyeing method in which a tubular knitted fabric is continuously run in a dye liquor filled between a pair of squeezing rollers, and the dye liquor is dipped and nipped, the running direction of the knitted fabric during dipping and nip A continuous dyeing method for a tubular knitted fabric, which is carried out in a tensionless state by not applying tension to the fabric or by actively supplying it.