JP2006104626A - Textile cleaning method and textile treating apparatus used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a textile cleaning method by which a textile is effectively cleaned in a shorter time in a treatment method using a treatment apparatus of a type such as a liquid stream treatment apparatus, etc., for circulating a treatment liquid and treating a textile and a textile treating apparatus used therefor. <P>SOLUTION: The method comprises putting a fabric 1 in a treatment tank 4, bringing the fabric into contact with a high-temperature treatment liquid circulating the inside and outside of the treatment tank 4 so as to treat the fabric 1 and then cleaning the fabric with cleaning water. After treatment by the high-temperature treatment liquid, the high-temperature treatment liquid is gradually discharged from the treatment tank 4 and cleaning water is gradually fed to the treatment tank 4. In the operation, the high-temperature treatment liquid to be discharged is subjected to heat exchange with the cleaning water to be supplied, the discharged amount of the high-temperature treatment liquid is made equal to the supplied amount of the cleaning water and the liquid amount in the treatment tank 4 is constantly kept. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cleaning method after dyeing and other treatments for textiles such as fabrics, and a textile processing apparatus used therefor.

  For example, a liquid flow processing apparatus as shown in FIG. 4 is widely used as an apparatus for performing processing such as dyeing on textiles. This apparatus includes a staying portion 2 of the fabric 1 and an annular treatment tank 4 connecting the staying portion 2 and the transfer passage 3 of the fabric 1. Then, the processing liquid is sucked in from the processing liquid suction section 5 (three places in this figure) provided at the bottom of the retention section 2, and the processing liquid is controlled to a predetermined temperature via the circulation pump 6 and the heat exchanger 7. (Usually, the maximum temperature is set to a high temperature of 100 ° C. or higher) is returned to the treatment liquid ejecting section 8 attached to one end of the transfer passage 3, and the treatment is performed while the fabric 1 is transferred by the liquid flow. It is like that.

  In such a liquid flow treatment, various dyes, other chemicals, auxiliaries, etc. remain in the treatment liquid when the treatment is completed. Moreover, the oligomer, fluff, scale, etc. which are the products at the time of fiber polymerization generated from the fabric 1 are also contained.

  For this reason, for example, when polyester deep color dyeing or the like is performed, the treatment liquid is circulated while lowering the temperature of the treatment liquid through the cooling water through the heat exchanger 7 after the treatment is completed, and the treatment liquid is lowered to about 80 ° C. At that time, while maintaining the temperature, so-called “reduction cleaning” is performed in which hydrosulfite or an alkaline agent (caustic soda, soda ash, or the like) is injected into the treatment tank 4 to reduce the residue or the like. After the reduction cleaning, the processing liquid is cooled again to around 60 ° C., and then the processing liquid is discharged. After the cleaning of the textiles by repeating the supply of cleaning water (usually water), rinsing and draining a plurality of times, The fiber product is taken out from the treatment tank 4.

  However, in the above cleaning method, cleaning takes time, the temperature gradient during cooling is not smooth, and the quality of the fiber product obtained by causing wrinkles or the like in the fiber product may be deteriorated, which is a problem. Yes. Moreover, since the oligomer etc. which were melt | dissolved at high temperature reprecipitate by cooling, and remain | survive and adhere in the processing tank 4, what is called a kettle washing process must be performed frequently and there also exists a problem that it is complicated. Therefore, it is strongly desired to solve these problems.

By the way, the present applicant, in the airflow treatment apparatus that performs the treatment while injecting the gas-liquid mixed fluid of the treatment liquid and the airflow to the textile and circulatingly moving the inside of the treatment tank, discharges the treatment liquid at a high temperature, and A completely new cleaning method for supplying cleaning water while exchanging heat with the treated waste water has been proposed and already put into practical use (see Patent Document 1).
JP-A-8-269863

  Therefore, it is conceivable to apply the cleaning method in the airflow processing apparatus to the liquid flow processing apparatus. However, since the airflow processing apparatus uses a small amount of processing liquid and the apparatus configuration is different, the cleaning method is used as it is. It has proven difficult to apply to flow treatment equipment.

  The present invention has been made in view of such circumstances, and is effective in a shorter time in a processing method using a processing apparatus of a type that circulates a processing liquid and processes a fiber product, such as a liquid flow processing apparatus. It is an object of the present invention to provide a method for cleaning a fiber product that can be subjected to a cleaning process, and a fiber product processing apparatus used therefor.

  In order to achieve the above object, the present invention loads a fiber product into a treatment tank, treats the fiber product by bringing the high-temperature treatment liquid circulating inside and outside the treatment tank into contact with the fiber product, and then washing water. After the treatment with the high-temperature treatment liquid is completed, the high-temperature treatment liquid is gradually discharged from the treatment tank and the cleaning water is gradually supplied into the treatment tank, and is discharged at that time. Heat exchange between the high temperature treatment liquid and the supplied wash water, and the amount of discharge of the high temperature treatment liquid is equal to the supply amount of the wash water so that the amount of liquid in the treatment tank is kept constant. This cleaning method is the first gist.

  In addition, the present invention exchanges heat of the cleaning water with the high temperature processing liquid particularly when the liquid in the processing tank is lowered to a predetermined temperature range by discharging the high temperature processing liquid and supplying the cleaning water. The second gist is a method for washing a fiber product that is supplied directly into the treatment tank and washed.

  Furthermore, the present invention is a textile processing apparatus used in the textile cleaning method according to the first or second aspect, wherein the textile tank is loaded with the processing tank and brought into contact with the processing liquid, and the above processing. A treatment liquid circulation path that takes out the treatment liquid in the tank from the treatment tank and repeatedly supplies it into the treatment tank via a circulation pump and a heat exchanger, and is connected to the circulation pump suction side of the treatment liquid circulation path. A processing liquid discharge pipe for taking out and discharging a part of the processing liquid in the processing tank, and a cleaning pump connected to the circulating pump suction side of the processing liquid circulation path and downstream from the processing liquid discharge pipe connection portion. A cleaning water supply pipe for supplying the processing liquid circulation path, a heat exchanger for exchanging heat between the processing liquid passing through the processing liquid discharge pipe and the cleaning water passing through the cleaning water supply pipe are provided, Discharged from the liquid discharge pipe A cleaning water supplied from the physical fluid volume and the upper washing water supply pipe, and in that processor of the third aspect of textiles adapted to be controlled to be equal amounts from each other.

  That is, in the method for cleaning a textile product of the present invention, the high-temperature treatment liquid used for the treatment is discharged at a high temperature, and at that time, heat exchange is performed with the washing water supplied into the treatment tank for washing. Therefore, the temperature at the time of cleaning becomes much higher than before, and an excellent cleaning effect is achieved. Therefore, it is possible to reduce the number of times of water washing repeated after discharging hot washing water as compared with the conventional case. In addition, since the treatment liquid is discharged at a high temperature, oligomers and dye residues are removed in a state of being dissolved in the treatment liquid. Can be omitted. Therefore, the steam and chemicals used for raising the temperature in the reduction cleaning process are not necessary, and the cost can be reduced. And since the quantity which the said oligomer, dye residue, etc. adhere to the inner wall of a processing tank, etc. remain decreases, it has the advantage that the burden in maintenance, such as cleaning a processing tank regularly, is eased. In addition, since the discharge amount of the high-temperature treatment liquid and the supply amount of cleaning water are controlled to be equal to each other, the amount of liquid circulating in the treatment tank is kept constant even after shifting from the dyeing process to the cleaning process. As a result, the fiber product is not burdened and the finish is good.

  And among the above cleaning methods, in particular, when the liquid in the processing tank is lowered to a predetermined temperature range due to the discharge of the high temperature processing liquid and the supply of the cleaning water, the cleaning water is heat exchanged with the high temperature processing liquid. If the high-temperature treatment liquid is cooled to a low temperature range (for example, when the temperature is lowered from 80 ° C. to 60 ° C.), the temperature is reduced to a predetermined low temperature range in a shorter time. The temperature can be lowered. Moreover, since the cleaning water is directly supplied into the treatment tank, the cleaning can be performed simultaneously with the cooling, and the cleaning efficiency is further improved. In the conventional method, when it is lowered to a low temperature range, it is difficult to cool the fiber product with a smooth temperature gradient. Therefore, the fiber product is easily wrinkled. However, according to this method, the temperature gradient becomes smooth. , Has the advantage that wrinkles are less likely to occur.

  In addition, the textile processing apparatus of the present invention simply adds a simple configuration to the conventional processing apparatus, and can perform the above-described special cleaning method efficiently at low cost.

  Next, the best mode for carrying out the present invention will be described.

  First, FIG. 1 shows a liquid flow processing apparatus according to an embodiment of the present invention. Similar to the apparatus shown in FIG. 4, this apparatus includes a staying portion 2 of the fabric 1 and an annular processing tank 4 in which the staying portion 2 and the transfer passage 3 of the fabric 1 are connected. Then, the processing liquid is sucked in from the processing liquid suction section 5 (three places in this figure) provided at the bottom of the staying section 2, and is maintained at a predetermined temperature via the circulation pump 6 and the heat exchanger 7. Is recirculated to the treatment liquid injection section 8 attached to one end of the transfer passage 3, and the treatment is performed while the fabric 1 is transferred by the liquid flow.

  Further, in the treatment liquid circulation path 10 provided with the circulation pump 6 and the heat exchanger 7, a treatment liquid discharge pipe 11 is connected to the suction side of the circulation pump 6 for extracting and discharging a part of the circulating treatment liquid. A cleaning water supply pipe 12 for supplying cleaning water into the processing liquid circulation path 10 is connected to the downstream side of the connecting portion via a check valve 13.

  And both the said process liquid discharge piping 11 and the washing water supply piping 12 are passing through the heat exchanger 14, The temperature of a high temperature processing liquid falls by this heat exchanger 14, and the temperature of the normal temperature washing water rises. It is like that. However, the treatment liquid discharge pipe 11 and the cleaning water supply pipe 12 are provided with on-off valves 15 and 16 and flow meters 17 and 18, respectively. It can be controlled to be equal. Further, 19 is a pump for supplying cleaning water, and 20 is a water supply valve.

  Using the above liquid flow treatment apparatus, for example, the fiber product can be treated and washed as follows. That is, first, in the same manner as a normal liquid flow processing apparatus, the fabric 1 is loaded into the processing tank 4 and the same processing as normal is performed with the on-off valves 15 and 16 closed. When the processing is completed, the feed water valve 20 is opened and the pump 19 is operated to open the on-off valves 15 and 16, whereby a part of the processing liquid circulated in the processing liquid circulation path 10 is treated with the processing liquid. Simultaneously with the discharge pipe 11, cleaning water is supplied into the processing liquid circulation path 10. At this time, heat is exchanged between the discharged high-temperature treatment liquid and normal-temperature washing water by passing through the heat exchanger 14. Further, by controlling the flow rate using the flow meters 17 and 18 and the on-off valves 15 and 16, the discharge amount of the processing liquid and the supply amount of the cleaning water are controlled to be always equal. Thereby, it is possible to perform cleaning while keeping the liquid amount of the liquid circulating in the processing tank 4 (a mixed liquid in which the processing liquid is gradually replaced with the cleaning water) constant.

  Then, when the temperature of the circulating liquid reaches a predetermined low temperature range (for example, 60 ° C.), the discharge of the high temperature processing liquid and the supply of cleaning water are stopped, and if necessary, in the middle of the processing liquid circulation path 10. The liquid is directly discharged from a drainage port (not shown) provided, and a new washing water is supplied at a constant flow rate to perform washing treatment. After draining, supplying water, and washing again, the fabric 1 is taken out, A series of processing ends.

  According to the above-described cleaning method, the temperature at the time of cleaning is significantly higher than that in the past due to the heat exchange of the discharged high-temperature treatment liquid and the supplied cleaning water, so that an excellent cleaning effect is achieved. Therefore, it is possible to reduce the number of times of water washing repeated after discharging hot washing water as compared with the conventional case. In addition, since the treatment liquid is discharged at a high temperature, oligomers and dye residues are removed in a state of being dissolved in the treatment liquid. Can be omitted. Therefore, the steam and chemicals used for raising the temperature in the reduction cleaning process are not necessary, and the cost can be reduced. And since the quantity which the said oligomer, dye residue, etc. adhere to the inner wall etc. of the processing tank 4 and remain | survives decreases, it has the advantage that the burden in maintenance, such as wash | cleaning the processing tank 4 regularly, is reduced. . Moreover, since the discharge amount of the high-temperature treatment liquid and the supply amount of the washing water are controlled to be equal to each other, the amount of liquid circulating in the treatment tank 4 is constant even when the process shifts from the dyeing process to the washing process. Therefore, stable processing can be performed and a good finish can be obtained.

  In the present invention, the “high temperature treatment liquid” refers to a liquid heated by the heat exchanger 7 provided in the treatment liquid circulation path 10 and set to a high temperature from the liquid temperature at the time of supply. It is set appropriately depending on the type of treatment, the type of textile, and the like.

  Further, in the present invention, “washing water” is used that is lower in temperature than the high-temperature treatment liquid to such an extent that the liquid temperature of the high-temperature treatment liquid can be lowered by heat exchange with the high-temperature treatment liquid. Is not particularly limited, and water at normal temperature is usually used. Moreover, what added the appropriate chemical | medical agent can also be used for the purpose of the improvement of a cleaning effect, provision of a specific texture and function.

  Furthermore, in the present invention, as a method for keeping the amount of liquid in the treatment tank 4 constant by equalizing the discharge amount of the high temperature treatment liquid and the supply amount of cleaning water, as in the above example, the flow meters 17 and 18 are used. In addition, not only the method of controlling the flow rate of both using the on-off valves 15 and 16, but also an appropriate method can be used. In addition, a method of providing a liquid level sensor in the processing tank 4 and controlling the on-off valves 15 and 16 so that the liquid level is always kept constant is conceivable. Since the processing liquid circulates in a rippled manner and it is difficult to specify the liquid level, control combining the flow meters 17 and 18 and the on-off valves 15 and 16 is suitable as in the above example.

  In the above example, when the liquid temperature reaches a predetermined low temperature range by discharging the high-temperature treatment liquid and supplying cleaning water, the liquid is discharged, and new cleaning water is supplied at a constant flow rate. As another example, when the liquid temperature falls to a middle temperature range (for example, 80 ° C.) higher than the low temperature range where the liquid temperature can be discharged, the on-off valve 15 is closed and the processing liquid discharge pipe 11 is closed. It is possible to stop taking out the high-temperature treatment liquid and supply the cleaning water at a constant flow rate directly into the treatment tank 4 without exchanging heat with the high-temperature discharged liquid, thereby cooling the circulating liquid. Moreover, the supply of the washing water is not necessarily a constant flow rate. The increased amount of the liquid in the treatment tank 4 due to the supply of the washing water is gradually discharged from the drain valve. Then, when the temperature of the circulating liquid reaches a predetermined low temperature range (for example, 60 ° C.), the supply of the washing water is stopped, and if necessary, the liquid is directly discharged from the drainage port as in the above example. Then, after washing water is supplied by supplying new washing water, draining, water supply, and washing are performed again, the fabric 1 is taken out, and the series of processing ends.

  According to this method, not only can the temperature be lowered to a predetermined low temperature range in a shorter time, but also the cleaning water can be supplied directly into the treatment tank 4, so that the cleaning can be performed simultaneously with the cooling, and the cleaning efficiency is further improved. improves. In the conventional method, when it is lowered to a low temperature range, it is difficult to cool the fiber product with a smooth temperature gradient. Therefore, the fiber product is easily wrinkled. However, according to this method, the temperature gradient becomes smooth. , Has the advantage that wrinkles are less likely to occur.

  In the present invention, the type of fiber product to be treated is not particularly limited. For example, various synthetic fibers such as polyester, polyamide, and acrylic, blended products, union products, union products, or Cellulose fibers such as cotton, rayon and hemp, blended products, union products, union products and the like. The shape and form of the fiber product may be any woven fabric, knitted fabric, non-woven fabric, product (garment), or the like.

  And in this invention, as an apparatus which processes the said textiles and wash | cleans, what kind of thing may be used as long as it is a type which processes by the processing liquid which circulates inside and outside a processing tank. For example, in addition to the liquid flow processing apparatus shown in the above example, a package processing apparatus, a beam processing apparatus, a thread, a woven or knitted fabric, and the like, which are packaged and processed into a skein, cheese, corn, etc. Various types of processing devices such as a processing apparatus for processing fiber products in a suspended state or processing them in a state of being flattened can be listed. Furthermore, the present invention can be applied to an airflow processing device.

  In the present invention, the treatment for the textile can be widely applied to various treatments such as relaxation processing, resin processing, refining, and the like, outside the dyeing treatment and the liquid flow treatment apparatus.

  Next, examples of the present invention will be described together with comparative examples.

〔Example〕
Using the liquid flow treatment apparatus of the present invention shown in FIG. 1, the fiber product was dyed and washed according to the following conditions.
Textile: 100 kg of polyester fabric (polyester yarn 56 dtex / 48 f plain weave)
Process chart: Follow FIG.
Agents used in the dyeing process: Dye 5kg
Dispersant (Nikka Sun Salt RM-340, manufactured by Nikka Chemical Co., Ltd.) 600 g
600g acetic acid
Bath ratio: 1/12

[Comparative Example]
Using the conventional liquid flow treatment apparatus shown in FIG. 4, the textiles were dyed and washed according to the following conditions.
Textile product: the same as in Example.
Process chart: Follow FIG.
Agents used in the staining process: the same as in the examples.
Agents used in the reduction cleaning process:
1,200 g of NaOH
Hydrosulfite 1200g
Bath ratio: Same as the example

  The amounts used of steam, cooling water, etc. in the above Examples and Comparative Examples were examined and summarized in comparison with Table 1 below.

  From the above results, according to the method of the example, compared to the method of the comparative example, it is possible to reduce the use amount of any of steam, water, electric power, and medicine, and the process charts of FIG. 2 and FIG. As can be seen from the comparison, the time required for the cleaning process is greatly shortened, and it can be seen that a significant cost reduction is realized. In addition, the processed product obtained by the method of the embodiment is free from wrinkles due to temperature gradients and has a high quality.

  Further, the friction fastness (according to JIS L 0849) and the water fastness (according to JIS L 0846) of the treated product obtained by the method of the above example and the treated product obtained by the method of the comparative example were evaluated, and the results thereof. Are summarized in Table 2 below. In addition, about the Example goods, what finished the process in the middle of the process step was also evaluated in the same manner.

  From the above results, the example product (2 times of water washing) is the same robustness as the comparative example product, although the number of times of water washing is less than that of the comparative example product (treated product by conventional method: 3 times of water washing). You can see that it has a degree.

It is explanatory drawing which shows the processing apparatus of one Example of this invention. It is a process chart by the said Example. It is a process chart by a prior art example. It is explanatory drawing which shows the processing apparatus of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fabric 4 Processing tank 6 Circulation pump 7, 14 Heat exchanger 11 Processing liquid discharge piping 12 Washing water supply piping

Claims (3)

  A method of treating a fiber product by loading the fiber product into a treatment tank and bringing the fiber product into contact with a high-temperature treatment liquid circulating inside and outside the treatment tank, followed by washing with washing water. After the treatment with the liquid is completed, the high temperature treatment liquid is gradually discharged from the treatment tank and the cleaning water is gradually supplied into the treatment tank. At that time, the discharged high temperature treatment liquid and the supplied washing water are heat-exchanged. And the amount of the high-temperature treatment liquid discharged is equal to the amount of cleaning water supplied so that the amount of liquid in the treatment tank is kept constant.   When the liquid in the processing tank has dropped to the specified temperature range due to the discharge of the high-temperature processing liquid and the supply of cleaning water, the cleaning water is supplied directly into the processing tank without heat exchange with the high-temperature processing liquid for cleaning. The method for cleaning a textile product according to claim 1 to be performed.   It is a textile processing device used for the textiles washing method according to claim 1 or 2, Comprising: The processing tank which loads textiles and contacts processing liquid, The processing liquid in the above-mentioned processing tank is outside a processing tank And a treatment liquid circulation path that is repeatedly supplied into the treatment tank via a circulation pump and a heat exchanger, and connected to the suction side of the circulation pump of the treatment liquid circulation path for collecting the treatment liquid in the treatment tank. The processing liquid discharge pipe for taking out and discharging the part, and also connected to the circulating pump suction side of the processing liquid circulation path and the downstream side of the processing liquid discharge pipe connection portion, and supply the cleaning water into the processing liquid circulation path A treatment liquid discharged from the treatment liquid discharge pipe is provided with a heat exchanger for exchanging heat between the wash water supply pipe, the treatment liquid passing through the treatment liquid discharge pipe, and the wash water passing through the wash water supply pipe Quantity and top wash water supply piping A cleaning water to be al supplied, textiles processing apparatus characterized by being adapted to be controlled to be equal amounts from each other.