JPS61207661A - Continuous spray treatment of long cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous spray treatment method for long fabrics in finishing processing using dye liquors and various other treatment liquids.

[Conventional technology]

Common processing methods that add value to knitted and woven long fabrics, such as color, flexibility, water repellency, oil repellency, shrink resistance, flame retardancy, and flame retardancy, include long fabric or dyeing. It is well known that there is a method in which finished fabric is immersed in a treatment solution, then compressed in a certain amount of treatment solution with a mangle, and then subjected to steaming or dry curing. However, when applying this method to wide or thick long fabrics, it is extremely difficult to squeeze them uniformly with a mangle, and it is not recommended to squeeze them too forcefully as this may damage the texture of the fabric. do not have. Particularly in the case of pile fabrics, the amount of liquid retained between the piles during the soaking process far exceeds the required amount, so in addition to squeezing with a mangle, vacuum dehydration by suction is sometimes adopted; However, the efficiency is low and the power required is large, which is economically disadvantageous.

In addition to these general treatment methods, many other methods have been developed, including methods that use applicators (for example, West Germany's Küster method and Fleissner method) and foam processing methods designed from an energy-saving perspective. In contrast to this method, the recent spray method (also called spray method, injection method, atomization method, etc.) is not only energy-saving, but also has the advantage that it is easy to adjust the treatment liquid content, and that it does not impair texture. It has attracted particular attention as a new treatment method because it is non-hazardous. As a link to this, the inventor of this application is
No. 59-123957 "Continuous Dyeing Apparatus for Long Fabrics" includes a pile splitting roller installed in the width direction of the fabric to fold the long fabric in the length direction and divide the pile into piles, and this pile splitting roller. A plurality of fan-shaped spray nozzles forming a fan-shaped film-like spray pattern are attached to each of a plurality of sets of spray guns that face each other and extend parallel to the width direction of the fabric. The liquid films are arranged on the same line at the required intervals so that they are connected to each other and form a straight line on the fabric surface of the divided pile part, and the liquid film sprayed from one set of spray guns is separated from the other. Using a group of spray guns that can control the angle so that the liquid film sprayed in the same way from the series intersects on the same line on the fabric surface, it can be used especially for thick pile fabrics such as carpets and moquettes. An apparatus for improving the uniformity of the amount of processing liquid held has been disclosed.

[Problem that the invention seeks to solve]

As mentioned above, efforts are being made in various fields to equalize the amount of treatment retained in the treated fabric, but simply regulating the amount of treatment liquid will not produce products that are homogeneous and have good reproducibility. do not have. Therefore, the said patent application No. 59-12395
As described in No. 7, it is desirable to heat the fabric to be treated and the treatment solution in advance so that they come into contact at the most suitable temperature for bonding the active ingredients in the treatment solution and the fibers that make up the fabric. .゛However, even when the fabric heated to a predetermined temperature and the processing solution are brought into contact with each other using a special nozzle that evens out the amount of incubation, there is often a problem that satisfactory reproducibility cannot be obtained. happen.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has been developed.When a fan-shaped liquid film is sprayed onto a long fabric that is heated and transferred from a dry heat zone, a water vapor flow and a fabric reaction flow that flow in parallel so as to wrap around the fan-shaped liquid film. A method is adopted to maintain the humidity and temperature around the liquid film at a constant level by a flow of water vapor that flows countercurrently to the direction of fabric transport and is discharged outside the system together with heated air coming from the dry heat zone. Ta.

[Effect]

Generally, the solution temperature decreases as the solvent evaporates, corresponding to its latent heat of vaporization. Therefore, even if the processing liquid is heated to a predetermined temperature in advance, if the amount of evaporation of the solvent changes, the liquid temperature also changes. This phenomenon is particularly noticeable in droplets that have been atomized by spraying and have an extremely large surface area.
If the humidity and temperature around the droplet are kept constant, fluctuations in the amount of evaporation can be suppressed.

〔Example〕

As shown in FIG. 1, a long piece of dough 1 is heated by hot air blown from a hot air circulation fan 3 in a dry heat section 2 and folded using pile-splitting loso lees.
At the same time, spray gun group 5 on the part where the pile was split.
The dye solution heated to the dyeing temperature is sprayed from the diaphragm, passing through the partition wall and promoting the dyeing reaction in the moist heat section 6.If necessary, a second processing solution is sprayed from the spray gun group g to ensure that all the reactions are completed. At the end of the process, a series of steps from the water sealing tank 7 to the next drying step, for example, were integrated to create an apparatus capable of continuous processing. Here, the spray gun group 5 is of the same type as disclosed in Japanese Patent Application No. 59-123957, and has two fan-shaped nozzles A and B branched from the pipe header 8 as shown in FIG. The fan-shaped liquid films 3 and b sprayed from each intersect on the fabric 1 at the part where the pile 1' is divided by the pile splitting roll 4, and the intersections connect multiple sets as shown in FIGS. 3 and 4. to form a straight line in the width direction of the fabric.

Now, in the rear half of the dry heat section 2 of such an apparatus, two humidifiers 9 having variable rotation speed blowers and capable of temperature adjustment are installed on both sides of the fabric, and water vapor ejection holes 10 are provided as appropriate. By changing the direction and number of the duct of the humidifier 9, the wall of the device body, the steam outlet 10, and even the baffle plate (partition plate) 11, the fan-shaped liquid film sprayed from the fan-shaped nozzles A and B can be created. If the suction fan 12 or the like is used without disturbing the flow of liquids a and b, it is possible to prevent the heated air carried by the fabric from the dry heat section from entering, thereby reducing the humidity around the fan-shaped liquid films a and b. And it is very easy to keep the temperature constant.

Here, it is preferable to provide the humidifier 9 because even when the water vapor source is high-pressure steam and there are fluctuations in the source pressure, it is possible to operate with the fluctuations alleviated.

Therefore, by measuring the humidity and temperature near the fan-shaped liquid films a and b and manually or automatically adjusting the amount of water vapor to be fed, the amount of water vapor to be discharged, and the direction of the flow, etc., a constant state can be maintained. It is possible to maintain

〔effect〕

According to the method of this invention, not only is the spray method used to control the amount of treatment liquid retained on the fabric, but also the temperature of the preheated treatment liquid is maintained while the fibers of the heated fabric are Upon contact, a reaction between the two begins at the same time, allowing the effective ingredients in the treatment liquid to act effectively in a short period of time. The temperature variation when the treatment liquid comes into contact with the fibers is extremely small compared to conventional spray methods, the reaction rate is less variable, and the quality of the resulting product is also less variable. Furthermore, since the method of the present invention involves steaming the fabric immediately before spraying, it also has the advantage that the fibers of the fabric become easily compatible with the treatment liquid. Furthermore, the amount of water vapor used in this method can be adjusted as desired by determining the water vapor flow depending on the number and direction of the humidifier duct, the wall of the device body, the water vapor outlet, the baffle plate, etc., and adjusting the amount of inflow and discharge. temperature can be adjusted,
It is possible to maintain a constant state without waste,
The method of this invention is extremely effective not only for dyeing but also for fiber modification using various chemicals.The method of this invention is extremely effective not only for dyeing but also for fiber modification using various chemicals, and the energy-saving and resource-saving effects of being able to continuously and stably perform heated spraying on long fabrics are It's huge.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view schematically showing a continuous spray treatment device for long fabrics for explaining the details of the present invention, and Fig. 2 is a schematic diagram of the configuration of a spray part of the present invention viewed from the width direction of the fabric. FIG. 3 is a front view illustrating the state of the fan-shaped liquid film sprayed from the spray gun group of the present invention, and FIG.
The figure is a plan view thereof. 1...Dough, 2...Dry heat section, 3...Hot air circulation fan, 4...Pile split roll, 5...Spray gun group, 6...Moist heat section, 7...Water Sealed tank, 8... Pipe header, 9... Humidifier, 10... Steam outlet, 11... Baffle plate, 12... Suction fan Patent applicant: Suminoe Textile Co., Ltd. Agent: Sickle 1 ) Sentence 2 Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] When a fan-shaped liquid film is sprayed onto a long piece of fabric that is heated and transferred from the dry heat zone, there is a water vapor flow that is parallel to the fan-shaped liquid film and a countercurrent flow to the fabric transfer direction in the dry heat zone. The long film is characterized in that the humidity and temperature around the sector-shaped liquid film are kept constant by the steam flow discharged outside the system together with the heated air coming from the system, and the sector-shaped liquid film is maintained at a predetermined temperature. Continuous spray treatment method for fabrics.