JPS6347828B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a dyeing method, and in particular to a method for dyeing raw fabric coated with a dye to be colored and fixed. Generally, as a method of dyeing fibers with a dye printed or padded on a fabric such as polyester,
There are steaming methods, high pressure steaming methods, thermosol methods, superheated steam methods, etc. When dyeing the above-mentioned fibers, a process of coloring and fixing the dye is required during the processing process, and fixation requires an environment of constant temperature and moisture. The equipment that performs this color fixation, that is, the steamer, can be roughly divided into the high-pressure type (HPS) used in the high-pressure steaming method and the high-temperature type used in the superheated steam method, ie, the high-temperature steamer.
HTS). In the former case, continuous processing is not possible, so the latter is currently the mainstream, but in order to obtain high-performance fixation in the dyeing process of existing fabric, the production equipment is extremely large (the amount of accumulated fabric is also large). For example, it is large (400 m), and there is a need for short processing times, a reduction in the floor space occupied by fixing equipment, reductions in utility costs, losses, etc., and rapid dyeing and rapid HTS, which have lower energy costs, are required. desired. Conventionally, for example, one auto and three hand prints
In the case of a 10-sided dyeing facility, the production capacity for 8 hours a day is 3,000 to 4,000 meters, and the fixation process for the printed material is as follows:
If the above-mentioned HTS with a retention amount of nearly 400 m is used for processing, if the raw material is polyester, it will be processed for 70 to 90 minutes at a speed of 40 m/min. In addition, in such cases, for example, when processing by switching between polyester and cotton,
Because the superheated steam zone is extremely large, corresponding to the retention capacity of 400 m, production costs are extremely high due to losses during temperature rises and falls, and a huge site area is required for production equipment. In addition to this problem, there is also the problem that the equipment cost becomes extremely large. Therefore, it is currently difficult to introduce such equipment, especially in small and medium-sized printing factories, but on the other hand, various problems are unavoidable when outsourcing the fixing process, so it is necessary to maintain a consistent production system. It is also desired to do so. This invention has been made in view of the above points, and a drive guide that moves the dyed fabric to be fixed in color to a superheated steam chamber in a superheated steam atmosphere according to the material of the fabric by an endless conveyor. At the same time, the web is introduced by a roll and circulated along with an endless conveyor that moves between the driving guide roll and the opposing heating roll, and the web transported by the endless conveyor in the superheated steam chamber is heated by a heat capacity body. It is an object of the present invention to provide a dyeing method in which color development and fixation of the above-mentioned fabric is carried out by directly touching the surface of the fabric with a roll. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a dyeing processing apparatus for carrying out the dyeing method of the present invention. are doing. In the above-mentioned supply device 1, the fabric 7, which is made of a material such as polyester, on which a dye is printed or padded, is installed as a wound body 9, and the dye is printed or padded onto the fabric as a wound body 9. The current fabric 7 coated with the desired dye is guided to the fixing device 3 via a guide 11. The fixing device 3 has an endless conveyor 1 at the bottom.
The present web 7 is guided into the lower chamber 15 from the entrance 17 of this lower chamber 15,
It is introduced onto the endless conveyor 13. This endless conveyor 13 is, for example, a glass fiber felt conveyor, and its surface is specially coated (Teflon coated). Furthermore, the endless conveyor 13 is supported by a plurality of guides 19 in the lower chamber 15 and is configured to move clockwise in the figure. Further, the width of the endless conveyor 13 is set to, for example, 150 cm so that the above-mentioned current roll 7 can be placed thereon. Further, in the fixing device 3, a buffer zone 23 and a superheated steam chamber 25, which will be described later, are formed by a heat retaining wall 21 on the lower chamber 15. The buffer zone 23 and the superheated steam chamber 25 are separated by a plate 27. Further, in the superheated steam chamber 25, a plurality of drive guide rolls (feed rolls) 29 are arranged in parallel in the upper part, for example, four in the illustrated example, and a heat capacity body, such as a heating roll, is arranged in the lower part of the superheated steam chamber 25. A plurality of heat capacity bodies 31 (hereinafter referred to as heating rolls) are arranged in parallel, for example, three in the illustrated example. Incidentally, the position of the heating roll 31 is not limited to this, and may be located within the buffer zone 23. The endless conveyor 13 has a lower chamber 1
5 and the buffer zone 23 through one of the slit-like through holes 33, and further reaches the drive guide roll 29 through the inlet 35 of the superheated steam chamber 25, and further reaches the superheat roll 31. Then, in the superheated steam chamber 25, as described above, a plurality of drive guide rolls 29 and superheat rolls 31 are alternately stretched as shown in the figure, and reach the outlet 37 of the superheated steam chamber 25, where they pass through the buffer zone 23 again. It has an endless configuration in which it returns to the lower chamber 15 through the other slit-shaped through hole 39. This endless conveyor 13 is driven by the drive guide roll 29 described above. Therefore, the work sheet 7 introduced onto the endless conveyor 13 from the inlet 17 of the lower chamber 15 is guided by the endless conveyor 13 into the superheated steam chamber 25 along the above-mentioned path, and is then returned to the outside of the superheated steam chamber 25. derived. This superheated steam chamber 25 forms a superheated steam zone by the above-mentioned heating steam method, and has a heater such as an electric heater 4 at the bottom.
1, circulation fan 43, and fan suction duct 4
5. The heating roll 31 has a diameter of, for example, 5 to 20 mm.
cm, and its surface is coated with Teflon, and the above-mentioned endless conveyor 13
The current web 7 introduced by the method touches the surface directly. That is, on the side of each drive guide roll 29, the endless conveyor 13 is driven in contact with the surface of each drive guide roll 29, but on the side of each heating roll 31, the current fabric 7 comes into direct contact with the surface of each drive guide roll 29. . As mentioned above, the current web 7 that has been touched in a dispersive manner to each heating roll 31 and passed through an atmosphere of superheated steam is
The dye is colored and fixed, and then led out of the fixing device 3 from the outlet 47 of the lower chamber 15. The above-mentioned take-out device 5 winds up the fixed web 7a processed as described above onto a winding body 53 via guides 49 and 51. An example of a dyeing method using the dyeing processing apparatus having the above configuration will be explained. The temperature of the superheated steam zone can be adjusted between approximately 100 and 200°C depending on the fiber material of the present fabric 7 to be supplied. In addition, it is equipped with a superheated steam generation mechanism for the superheated steam method, and the primary pressure of live steam is
The pressure was set at 5.0Kg/cm ² , and the control pressure (blowing pressure) was set at 1.5Kg/cm ² . Furthermore, the electric heater 41 as a heating mechanism was 50KW. The temperature of the heating roll 31 was between room temperature and 200°C, and was selected depending on the fiber material of the raw fabric 7. For example, in the case of the polyester material 7, the temperature of the heating roll 31 was set to 185°C when the superheated steam temperature was set to 180±2°C. In addition, if the material is cotton cloth 7, the former
When the temperature was 120±2°C, the latter was set to 127°C. Similarly, when the material was cotton, the former was set at 105°C and the latter at 160°C. The heating roll 31 may be naturally heated indoors using the superheated steam chamber 25, or may be a temperature-variable control roll by, for example, providing an appropriate heater means in the heating roll 31 and passing a fluid at a desired temperature. Then, forced heating or cooling may be applied. As described above, the same applies to the case where the heating roll 31 is disposed in the buffer zone 23. In addition, the amount of accumulated web 7 in the superheated steam zone, that is, from the superheated steam chamber inlet 35 through each driving guide roll 29 and superheated roll 31, to the superheated steam chamber outlet 3.
The length up to point 7 was 10 m. Furthermore, the touch pressure between the present fabric 7 and the heating roll 31 was set to 0.2 to 2.0 Kg/cm ² . This touch pressure is
It may be applied by pulling the overheating roll 31 side downward. Furthermore, the floor area occupied by the device is 3m x 4m =
It is ^12m2 . In the illustrated example, the dyeing method using the above apparatus uses an endless felt conveyor 13 made of glass fiber, places the treated fabric, that is, the above-mentioned present fabric 7 on the conveyor 13, rotates it with a drive guide roll 29, and The heated roll 31 touches the treated cloth in a dispersive manner to effect color development and fixation in an atmosphere of superheated steam. With the conventional roll ageer method, processed yarns and knitted yarns had problems with texture and elongation in terms of tension, but with the above dyeing method, there was no problem with the texture and elongation of processed yarns and knits.
At the same time, by controlling the touch pressure between the treated cloth (fabric) and the heating roll 31, shrinkage and elongation inside the treatment can be controlled within ±0 to 5%, and wrinkles and slack inside can be controlled. You can process it without looking at it at all. Moreover, the internal retention amount of treated cloth (fabric) is approximately 10 m.
Because it is short and the superheated steam zone is compact,
It has excellent temperature raising and cooling capabilities, and the time from 100°C saturation treatment to 180°C superheating treatment is as follows.

[Table] In addition, when touching the treated cloth to the heating roll 31, the problems of reflection, staining, and uneven color development can be eliminated by using the special coating and contact pressure control as described above, and by repeatedly promoting the adsorption of porous solids, polyester Both cotton and cotton can be made into lapid. Next, the coloring effect of the above dyeing method will be explained in more detail. FIGS. 2 and 3 are graphs showing relative concentrations (ratios) when the materials are polyester and cotton, respectively. In Figure 2, l ₂₁ is according to the above-mentioned HPS,
l ₂₂ is the relative concentration (ratio) vs. processing time (min) curve for the conventional HTS method, l ₂₃ for the thermosol method, and l ₂₄ for the dyeing method of the present invention. ₂₄ processing time 60-120
The relative concentration (ratio) becomes approximately 100 in seconds, compared to other methods,
It has been shown to be superior in terms of both concentration and processing time. Figure 3 is a characteristic diagram for cotton, where _l31 is the relative concentration (ratio) vs. processing time (minutes) curve when using HPS and _l32 is the respective relative concentration (ratio) vs. processing time (minutes) curve when using the dyeing method of this invention. Similarly, it has been shown that the relative concentration (ratio) becomes approximately 100 in 60 to 120 seconds. In this way, according to the dyeing method described above, HPS
A similar level of surface concentration could be obtained in a short time, and rapid HTS could be produced. In addition, the above processing method is
In addition to mounting, it can also be applied to desizing, scouring, bleaching, and dyeing, and can perform rapid treatment by uniformly depositing predetermined dyes, chemicals, etc. on the current fabric. As described above, according to the dyeing method of this invention,
When introducing the fabric for dyeing treatment, if it is placed in contact with an endless conveyor circulating in a heated steam atmosphere, the fabric can be easily introduced into the superheated steam atmosphere along with this endless conveyor. . In addition, since the endless conveyor in the superheated steam atmosphere is driven by pressing around the drive guide roll, the web can be moved without being pushed or pulled, and as a result, the web in the fixing device will not shrink or shrink. It does not stretch. Since the current fabric is directly touched by the heating roll of the heat capacity body, color development and fixation can be reliably performed at high speed.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are characteristic curve diagrams for explaining the present invention, respectively. (Explanation of main symbols shown in the drawings), 7
... Current roll, 13 ... Endless conveyor, 25
...Superheated steam room, 31...Superheated roll.

Claims (1)

[Claims] 1 In the method of conveying and dyeing a raw fabric in a superheated steam atmosphere, the dyed fabric to be colored and fixed is endlessly transferred to a superheated steam chamber in a superheated steam atmosphere according to the material of the fabric. The web is introduced by a driving guide roll in contact with the conveyor, and the web is circulated along with an endless conveyor that moves between the driving guide roll and a heating roll opposite to the heating roll, and the web is transferred from the endless conveyor to the heating steam chamber. A dyeing method characterized in that color development and fixation of the present fabric is carried out by directly touching the surface of the fabric with a heating roll of a heat capacity body.