JPS627316B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for dyeing a fabric containing polyester fibers and cotton fibers using moist heat at about 130°C.

When dyeing fabrics such as woven fabrics and knitted fabrics, dyeing can be achieved at high speed and with good dyeability by dyeing the fabric to be dyed under moist heat at high temperature and pressure. is well known, and for example, in order to dye under this high temperature, high pressure, and moist heat, discontinuous dyeing has been carried out using a batch dyeing method or the like. However, with this discontinuous dyeing method, thermal energy or dyeing solution is wasted every time the fabric is replaced, and furthermore, when a large amount of fabric is dyed industrially, it takes a lot of effort and expense to replace the fabric within a batch. There were many problems such as the staining was difficult to achieve and it was difficult to achieve uniform dyeing. Therefore, the present inventor has conducted long-term research on a high-pressure steamer that can maintain high-pressure moist heat of around 160°C and can continuously pass through the fabric to be dyed, and has now completed the high-pressure steamer. being driven.

However, the high pressure steamers currently in operation require extremely high pressure and moist heat, e.g.
Since the device is capable of raising and maintaining temperatures up to around 160℃, the overall size of the device naturally increases due to its pressure-resistant strength, and the cost of the high-pressure steamer becomes enormous, and furthermore, it becomes difficult to transport and install it. It is inconvenient and requires a large installation area, which has the disadvantage of increasing equipment costs in today's high land prices.

The present invention was made to eliminate such drawbacks, and its first purpose is to reduce the holding pressure inside the steamer can to around 2.7 kg/cm ² to make the high-pressure steamer more compact. be.
The second objective is to develop a dyeing method that provides good dyeing performance at a moist heat temperature of approximately 130°C for a saturated vapor pressure of 2.7 Kg/cm ² , which is almost the same as the conventional dyeing performance at a moist heat temperature of around 160°C. It is to be.

Furthermore, to describe the present invention more specifically, the dyeing treatment temperature using a conventional high-pressure steamer was carried out at around 160°C, but in the present invention, the dyeing treatment temperature was approximately 130°C, compared to the conventional dyeing temperature of around 160°C. In order to achieve high-quality dyeing at a dyeing speed that is not much different from the dyeing process, a two-stage treatment method of pre-treatment and post-treatment is adopted. The desired purpose is achieved by dyeing the fabric, which has enhanced dyeability, in a short period of time at a moist heat temperature of around 130°C.

The present invention will be explained in detail below based on embodiments shown in the drawings.

A, B, and C are steamer cans arranged in the horizontal direction, and each of the steamer cans A, B, and C has an inlet a and an outlet b for continuously introducing and extracting fabric. It is provided. Inlet ports a of the steamer cans A and B are provided with inlet-side seal mechanisms 1 and 1' for allowing the passage of cloth but maintaining the moist heat temperature inside the steamer cans. The introduction-side seal mechanisms 1 and 1' have a fabric passage 2 communicating with the introduction port a, and a pair of seal rolls 3 that close the outer opening of the fabric passage 2. A J-shaped liquid tank 4 is provided in the fabric passage 2, and a liquid tank 5 is provided outside and above the seal roll 3 of the other introduction-side sealing mechanism 1'. Reference numeral 6 denotes an outlet-side sealing mechanism connected to the outlet b of the steamer cans A and C, and water is sequentially supplied between the pair of seal rolls 7 provided in the sealing mechanism 6 and the outlet b. A slow cooling tank 8 is formed.

Note that the outlet b of the steamer can B and the inlet a of the steamer can C are directly connected. As described above, the steamer cans A, B, and C are sealed by the inlet side seal mechanisms 1 and 1' and the outlet side seal mechanism 6, and are sealed by the pressurized steam supplied from the steam pipe 13. The moist heat inside the steamer can is maintained at around 130°C, that is, the internal pressure is maintained at approximately 2.7 kg/cm ² . Each steamer can A, B, C
Inside, a large number of guide rolls 10 are arranged above and below to move the fabric 9 in a meandering manner. Reference numeral 11 indicates a cleaning tank disposed approximately at the rear half of the interior of the steamer can body A, and 12 indicates a liquid tank provided near the inlet a in the steamer can body C.

Next, to explain its function, first, a caustic solution of a predetermined concentration is poured into the liquid tank 4, and a disperse dye for dyeing the polyester fiber and a reaction mixture for dyeing the cotton fiber are placed in the liquid tank 5. Add a dye solution mixed with a color dye. Further, the liquid tank 12 is filled with a reducing agent for dyeing the cotton fibers with the reactive dye, and cold water is constantly circulated and supplied into the slow cooling tank 8 of each sealing mechanism 6.

Therefore, the fabric 9, which is a blend of polyester fiber and cotton fiber, or a mixture of knitting and weaving, is first passed through the sealing mechanism 1 on the introduction side of the steamer can body A, and then the fabric 9 is passed through the sealing mechanism 1 on the introduction side of the steamer can body A.
After the fabric is impregnated with the caustic liquid contained in the fabric, the liquid content is adjusted using a squeezing roll 14, and then subjected to moist heat treatment in the steamer can body A where moist heat of around 130°C is maintained to roughen the surface of the fabric fibers and dye. Processed to increase dyeability. The fiber fabric whose surface has been roughened in approximately the front half of the steamer can body A is washed in the cleaning tank 11 and then cooled in the slow cooling tank 8, and the desired texture is maintained in the steamer can body A. derived outside of. The fabric that has been treated to improve its dyeability is placed in the liquid tank 5.
The mixed solution of disperse dye and reactive dye is impregnated while passing through the steamer can body B, which is then introduced into the steamer can body B where moist heat of around 130°C is maintained, and is subjected to a moist heat treatment within this steamer can body B. The disperse dye is applied to the fabric 9.
Dyed onto polyester fibers. The fabric dyed with the disperse dye in this way is supplied into the next steamer can C, and the liquid tank 1 disposed inside this steamer can C
The fabric is impregnated with the reducing agent placed in the steamer can body C, and then subjected to moist heat treatment in the steamer can body C to dye the cotton fibers with the reactive dye, and then cooled in the slow cooling tank 8 to give the fabric a desired texture. It is held and led out to the outside of the steamer can body C to complete the intended dyeing process.

As described above, the present invention improves the dyeability of the fabric through pre-treatment, and then applies a dyeing liquid to the fabric during post-treatment and dyes it under moist heat. The product was dyed very quickly (with a moist heat treatment time of about 1 minute) and of good quality under moist heat of 160°C, and the dyeing was as good as the previous dyed product dyed under moist heat of 160°C. In addition, since the temperature of the steamer can is around 130°C, the reducing agent placed inside the steamer can does not deteriorate, and dyeing is more effective than with conventional dyeing methods using high-pressure steamers. It has the advantage of simplifying the equipment as well as making it more convenient.

Therefore, by adopting the dyeing method according to the present invention, it is sufficient to raise the moist heat temperature inside the steamer can to about 130°C, so the pressure resistance of the steamer can is improved compared to previous high-pressure steamers. This has the effect of providing a compact, low-cost high-pressure steamer.

[Brief explanation of the drawing]

The drawing is an explanatory diagram showing an example of an apparatus used in the dyeing method of the present invention. A, B, C... Steamer can body, a... Inlet port,
b... Outlet port, 1, 1'... Inlet side seal mechanism,
2...Fabric passageway, 3...Seal roll, 4...Liquid tank, 5...Liquid tank, 6...Outlet side seal mechanism, 7...
...Seal roll, 8...Learning tank, 9...Fabric, 1
0...Guide roll, 11...Cleaning tank, 12...
Liquid tank, 13...steam pipe, 14...squeezing roll.

Claims (1)

[Claims] 1. A pre-treatment process in which a fabric containing polyester fibers and cotton fibers is impregnated with an alkaline solution and subjected to moist heat treatment under saturated steam at around 130°C to roughen the fiber surface, and following this pre-treatment process The fabric is then impregnated with a dyeing solution consisting of a disperse dye and a reactive dye, and then the dyeing solution-impregnated fabric is dyed at 130°C.
A polyester fiber dyeing process in which disperse dyes are dyed on polyester fibers by wet heat treatment under saturated steam at around 130°C, and then a reactive dye fixing agent is applied to the fabric and dyeing is performed under saturated steam at around 130°C. 1. A continuous dyeing method for fabrics containing polyester fibers and cotton fibers, characterized by comprising a cotton fiber dyeing step in which a cotton fiber dyeing process is performed with moist heat treatment.