KR100780791B1 - Desizing and scouring method of towel - Google Patents

Abstract

A method for scouring a towel fabric is provided to scour effectively the towel fabric while minimizing the use of energy and water, by performing sequential processes while maintaining appropriate pH and temperature in steps. A buffer solution of pH 8.2-8.5 is prepared by adding Na2CO3 and CH3COOH into 800-1200 wt% of water, based on 100 wt% of a towel fabric. The towel fabric is submerged in a scouring solution obtained by mixing 1-3 wt% of nonionic surfactant into the buffer solution. The scouring solution, in which the towel is submerged, is gradually heated for 10-20 minutes to a temperature of 55-60°C. An enzymatic scouring process is performed by adding 0.3-0.7 wt% of pectinase, 0.3-0.7 wt% of amylase, 0.2-0.5 wt% of cationic surfactant into the scouring solution, and causing enzymatic reaction for 25-35 minutes. The scouring solution passed by the enzymatic scouring process is heated to 98°C. A 0.2-0.4 wt% of soaping agent is mixed into the scouring solution. The scouring solution and the soaping agent are stirred for 15-25 minutes. The towel fabric is put out from the scouring solution, and washed with water of low-temperature three times.

Description

Refining method of towel fabric {Desizing and scouring method of towel}

The present invention relates to a method for refining towel fabrics.

Products made of natural and synthetic fibers contain a significant amount of primary impurities contained in the fibers themselves and secondary impurities imparted in the spinning, spinning and weaving processes. The refining process is a process for facilitating dyeing or finishing processing by removing contaminants consisting of warp protection agent, spinning oil, woolen oil, granulation oil, surfactant, dust, machine oil, and so on. It is desirable to include a soaping process and to completely remove the contaminants while minimizing the physical and chemical changes of the fibers.

In general, the towel fabric is mainly composed of cotton fibers, and a strong alkaline solution such as sodium hydroxide is refined using a method of depositing the fibers for about 1 hour while maintaining a high temperature of 95 ℃. However, this method has a limitation in that the damage to the fiber is severe and the weight loss is large, and when the fiber which is weak in high temperature or alkali is mixed, it is difficult to apply the process properly. In addition, because of the high energy consumption, strong alkaline solution of pH 12-14, water pollution caused by waste water is severe, and after washing, many washing processes are required. There was this.

As an alternative to the prior art, a method for refining cotton fibers using an enzyme has been proposed. For example, in the one-bath decantation method using the Korean Patent Application Laid-Open Publication No. 2002-0086837, amylase enzyme 1-2g / L, pectinase enzyme 0.1- The fabric was added to a solution mixed with 0.2 g / L, 2 g / L of a dehumidifying agent, and 2 g / L of a wetting agent, and then decanted and refined at a pH of 7-9, a bath ratio of 1:20 and a temperature of 30-60 ° C. for 30-60 minutes. Provided. Compared to the refining method using the strong alkaline solution, the one-bath decanting method has the advantage of low energy consumption and waste water generation and a simple process. However, the method does not prevent the enzyme reaction from interfering with the dehydrogenating agent or the wetting agent, or changes the pH of the refinement during the reaction, thereby inhibiting the enzyme activity. When applied to a fabric having a special weave, such as towels, there is a limit to the effect.

In the present invention, in the refining of the towel fabric, by performing a sequential process while maintaining the appropriate pH and temperature step by step, to provide a method of efficiently refining while minimizing the use of energy and water.

The present invention relates to a method of refining a towel fabric, wherein the towel fabric is refined through a wet and wax extraction process, an enzyme refining process, a soaping and a washing process, and a bleaching and dyeing process is added between the enzyme refining and the soaping process as necessary. Can be.

The first step consists of a wet and wax extraction process, and a surfactant is added to the refining solution for the wet and wax extraction of the towel fabric.

Since the refining solution of the first step is also used in the second step, the addition of a substance to the refining solution that inhibits the activity of the enzyme or impedes the maintenance of the proper pH in the second step. In the second step, in order for the enzyme pectinase and amylase to be active at the same time, it is preferable to maintain pH 8.2-8.5, and it is necessary to use a buffer solution to minimize the pH change during the enzyme reaction. In the present invention, a buffer solution of pH 8.2-8.5 is prepared using Na ₂ CO ₃ and CH ₃ COOH which is inexpensive and easily available, and when 0.5 g of Na ₂ CO ₃ and 0.3 mL of CH ₃ COOH are added per 1 L of water, A refining buffer at pH 8.2 can be prepared.

Since the surfactant removes impurities such as wax from the towel fabric, it improves the wettability of the towel fabric and serves to assist the enzyme reaction by improving the contact between the cotton and the enzyme in the second process. In the present invention, a nonionic surfactant is selected to minimize the pH change of the refining solution. When the amount of the surfactant is less, the impurity removal effect is inferior, and when the amount of the surfactant is the high amount, it not only disturbs the enzymatic reaction of the second process but also generates a large amount of bubbles, resulting in a long time for the post-treatment process. Therefore, in the present invention, 1-3 parts by weight of the nonionic surfactant is used based on 100 parts by weight of the towel fabric.

If the amount of the towel fabric deposited in the refining solution is large, refining is not performed properly, and if the amount of the towel fabric is small, the cost of refining increases, so in the present invention, 800-1200 parts by weight of water To prepare a refining solution. In the first step, the towel fabric is immersed in a refining solution at room temperature, and then gradually heated for 10-20 minutes so that the final temperature is 55-60 ° C. suitable for the enzymatic reaction of the second step.

The second step is an enzyme refining step, in which pectinase, amylase, and a surfactant are added to a refining solution heated to a temperature suitable for enzymatic activity.

One of the main reasons why waxes and other contaminants adhere to the towel fabric is because pectin plays a role similar to that of adhesives, so it is easy to remove the contaminants by decomposing the pectin using pectinase. The removal increases the wettability of the fiber. Pectinase removes pectin without degrading cellulose, so there is no fear of reducing the strength of the towel fabric. If the amount of pectinase is less, the pectin degrading effect is lowered, and if the amount is high, the cost is increased. Thus, in the present invention, 0.3-0.7 parts by weight is used with respect to 100 parts by weight of the towel fabric.

Amylase is used to remove the starch component used as an aid for towel fabrics. If the amount of amylase used is low, the effect is reduced, and if the amount used is high, the cost increases, so in the present invention, 0.3 to 0.7 parts by weight is used for 100 parts by weight of the towel fabric.

Anionic surfactants are added to aid in the removal of the wax from the fibers and to impart wettability. Since anionic surfactants deactivate the enzymes over time, which in turn inhibits the enzymatic reaction, it is not preferable to use a large amount of anionic surfactants and to avoid mixing with the enzymes in advance. In the present invention, using 0.2-0.5 parts by weight of anionic surfactant based on 100 parts by weight of the towel fabric, while exhibiting the effect of the surfactant so as not to inhibit the enzymatic reaction, after mixing the enzyme in the refining solution anionic surfactant Mix it.

Increasing the temperature in the second process, the activity of the surfactant is active while the stability of the enzyme is lowered, so maintain the temperature of 55-60 ℃, and maintain the pH 8.2-8.5 so that the pectinase and amylase can be active at the same time. In addition, the reaction time is good to ensure a sufficient time for the enzyme to act, but under the above conditions it is preferable to react for 25-35 minutes because the enzyme is inactivated and no further reaction occurs after 35 minutes.

Optionally, a bleaching process or a dyeing process may be optionally performed. The bleaching and dyeing process may be performed immediately after the completion of the enzymatic reaction, followed by a soaping process.

The third process is a soaping and washing process, and the soaping process is performed to impart emulsification dispersion power to impurities removed during the refining process to prevent reattachment to the fibers. The soaping process has good efficiency at high temperature, but if water boils and bubbles are generated a lot, water washing becomes difficult, so it is performed at a temperature of about 98 ℃, and if reacted for a short time or too long, impurities may adhere to the fiber. It is preferable to carry out. If the amount of the anti-foaming agent is low, the emulsification dispersing power is insufficient. If the amount of the anti-foaming agent is used too much, water washing becomes difficult due to the generation of bubbles. Therefore, 0.2-0.4 parts by weight of the towel fabric is used.

The towel fabric after the soaping process is washed three times by exchanging water, and water at room temperature may be used in the washing process.

The refining method of the towel fabric according to the present invention comprises a wet and wax extraction process, an enzyme refining process, a soaping and washing process; In the wet and wax extraction process, Na ₂ CO ₃ and CH ₃ COOH were added to 800-1200 parts by weight of water with respect to 100 parts by weight of the towel fabric to prepare a buffer for refining at pH 8.2-8.5, and the nonionic surfactant 1- Mix 3 parts by weight and deposit the towel fabric, then slowly heat for 10-20 minutes to raise the temperature to 55-60 ° C .; In the enzyme refining process, 0.3-0.7 parts by weight of pectinase and 0.3-0.7 parts by weight of amylase are mixed, followed by reaction for 25-35 minutes by adding 0.2-0.5 parts by weight of anionic surfactant; In the soaping and washing process, the mixture is heated to 98 ° C., mixed with 0.2-0.4 parts by weight of a soaping agent, stirred for 15-25 minutes, and then washed three times with water at room temperature.

EXAMPLE

[Step 1] Wetting and Wax Extraction

After mixing 5 g of Na ₂ CO ₃ and ₃ ml of CH ₃ COOH in 10 L of water to prepare a buffer solution having a pH of about 8.2, 10 g of nonionic surfactant was uniformly mixed, and 1 kg of a towel fabric for towel manufacturing was deposited. It was heated slowly over 15 minutes to reach 55 ° C.

[Step 2] Enzyme Refining

5 g of pectinase, 5 g of anionic surfactant, and 5 g of amylase were mixed in the solution at 55 ° C. and stirred while maintaining the temperature for 30 minutes.

[Process 3] Soaping and Washing

The enzyme-refined solution was slowly heated over 15 minutes to a final temperature of 98 ° C., and then mixed with 3 g of low-foaming soaping agent and stirred while maintaining at 98 ° C. for 20 minutes. Washed with water.

In the method of refining the towel fabric according to the embodiment, by performing a sequential process while maintaining the appropriate pH and temperature step by step, the towel fabric can be effectively refined while using less energy and water than the conventional one bath enzymatic refining method. Can be.

The refining method of the towel fabric according to the present invention is excellent in the refining effect while less damage to the fiber, there is an environmentally friendly feature because the amount of energy and water and the amount of waste water discharged is small.

Claims (2)

Na ₂ CO ₃ and CH ₃ COOH were added to 800-1200 parts by weight of water based on 100 parts by weight of the towel fabric to prepare a buffer solution for refining at pH 8.2-8.5, and 1-3 parts by weight of the nonionic surfactant was mixed and toweled. A wetting and wax extraction process of increasing the temperature to 55-60 ° C. by slowly heating the fabric for 10-20 minutes after the fabric was deposited; An enzyme refining process of adding 0.3-0.7 parts by weight of pectinase and 0.3-0.7 parts by weight of amylase, and then adding 0.2-0.5 parts by weight of anionic surfactant to react for 25-35 minutes; A method of refining a towel fabric comprising a soaping and washing step of heating to 98 ° C., mixing 0.2-0.4 parts by weight of a soaping agent, stirring for 15-25 minutes, and then washing with water at room temperature three times. The method of claim 1, 0.5 g / L of Na ₂ CO ₃ and 0.3 mL / L of CH ₃ COOH were added to 800-1200 parts by weight of water based on 100 parts by weight of the towel fabric to prepare a buffer solution for refining at pH 8.2, and 1 weight of nonionic surfactant. Wetting and wax extraction process of mixing the parts and immersing the towel fabric, and gradually heating for 15 minutes to raise the temperature to 55 ℃; An enzyme refining process of mixing 0.5 parts by weight of pectinase and 0.5 parts by weight of amylase, and then adding 0.5 parts by weight of anionic surfactant to react for 30 minutes; A method for refining a towel fabric comprising a soaping and washing step of heating to 98 ° C., mixing 0.3 parts by weight of a soaping agent, stirring for 20 minutes, and exchanging with water at room temperature for three times.