CN105696353A - Enzyme refining method based on cotton fabric - Google Patents

Abstract

The invention relates to the field of pretreatment of cotton fabrics for printing and dyeing, and discloses an enzyme scouring method based on cotton fabrics to solve the problems of long scouring time, high temperature and large damage of existing cotton fabrics. The main improvement points of the enzyme refining method of the present invention are: in view of the problems of long stacking time and high temperature in the existing enzyme refining process, the method of repeatedly padding the enzyme refining solution is used for processing, and the method suitable for this method is optimized. Composition and processing conditions of enzyme refining solution. The hair effect and whiteness of the treated cotton fabric reach the level after traditional alkali scouring, the strength of the treated cotton fabric is better than that of the traditional scouring method, and the scouring time is greatly shortened.

Description

A kind of enzymatic scouring method based on cotton fabric

technical field

The invention relates to the field of pretreatment of cotton fabric printing and dyeing, in particular to an enzyme scouring method based on cotton fabric.

Background technique

Cotton fabric has multi-functionality and excellent wearing properties such as moisture absorption, breathability, warmth retention and comfortable wearing, and has become one of the most commonly used clothing materials in the world, and is also widely used in decorative fabrics and industrial fabrics. According to statistics, in recent years, cotton fiber accounts for about 40% of all fiber consumption in the world, and is one of the largest fiber varieties consumed by people. Therefore, it is an important topic in the field of textile research to study efficient, energy-saving, water-saving, and environmentally friendly cotton fabric pretreatment processes.

For the desizing, scouring, and bleaching processes of cotton fabrics, the traditional method mostly uses high-temperature concentrated alkali treatment. This process not only has a long process route, large energy consumption, high production costs, and serious environmental pollution. The COD and pollution load generated in the treatment process accounted for 75%, and the water consumption accounted for 75% of the total water consumption in printing and dyeing processing, and at the same time caused a serious loss of fabric strength.

For this reason, in recent years, the textile industry has researched and developed various energy-saving and environment-friendly pretreatment processes, such as: biological enzyme refining process, etc. These processes have solved the environmental problems of cotton fabrics to a certain extent, but there are also problems such as too long processing time.

Xu Gucang introduced an enzymatic scouring process for desized cotton fabrics. The process is as follows: desized fabric → rolling enzyme refining solution (70°C, PH value 8-9) → stacking (4 hours at room temperature) → hot water washing (95°C)→warm water wash (60°C)→cold water wash→dry. The enzyme refining liquid consists of: pectinase, cellulase, penetrant WZ. The process is characterized in that it is stacked at room temperature after the liquid is squeezed, and the temperature is low but the stacking time is long (4 hours). Although the treatment effect of this process can basically reach the level of the traditional process, and the fiber strength is less damaged, the stacking time is relatively long, and the cost is increased due to the increase in the amount of enzymes and penetrants.

Chen Xinxing introduced a one-bath process of enzymatic boiling and bleaching after desizing. ℃)→drying→rolling compound enzyme, hydrogen peroxide mixed solution (90-100% liquid content)→steaming (100℃, 50 minutes)→hot water washing (95℃)→acid washing (HCL)→cold water washing→drying Dry. Its desizing liquid contains high-temperature desizing enzyme and scouring agent; its blanching liquid contains compound enzyme, hydrogen peroxide and auxiliary agents. The characteristic of this one-bath enzyme boiling and bleaching process is that it adopts a high-temperature steaming process (100°C), and compared with the pad-batch process, the processing time is reduced (50 minutes), but the biggest problem of this process is that most biological enzymes are not suitable It functions at a temperature of 100°C, and its activity is greatly affected.

The purpose of the present invention is to provide a low-temperature, short-flow enzymatic scouring method based on cotton fabrics to solve the problems of long time, high temperature and waste of resources in the treatment of cotton fabrics in the existing traditional alkali scouring technology and existing enzyme scouring technology. The problem of high cost.

Contents of the invention

A kind of enzyme refining method based on cotton fabric, comprises the following steps:

1) preparing desized cotton fabrics, preparing an enzyme scouring solution, the formula of the enzyme scouring solution comprising 0.1-5 g/l cellulase, 0.1-5 g/l hemicellulase, 0.1-10 g/l pectinase, Penetrant JFC1g/l; 2) Control the temperature of the enzyme scouring solution prepared in step 1 at 45-65°C, while wetting the desized cotton fabric; 3) Put the wetted cotton fabric in the above-mentioned enzyme scouring solution continuously for 2- 20 times of padding, the soaking time in each padding process is 10-90 seconds, the liquid-carrying rate of cotton fabric after padding is 80-120%, and then washed with water. The washing conditions are: 50°C hot water washes twice, cold water Wash twice, and finally dry to obtain the finished product of enzyme scoured cotton fabric. The cotton fabric is pure cotton fabric.

The preferred enzyme refining liquid contains 0.5-1.5 g/l cellulase, 0.5-1.5 g/l hemicellulase, 1.0-2.0 g/l pectinase, 1 g/l JFC. It is verified by experiments that the enzyme scouring solution of this composition has the best effect, and the treated cotton fabric has high wool effect, whiteness, tensile strength and soft hand feeling.

The preferred temperature of the cotton fabric padding treatment solution is 50-60° C., the soaking time of the fabric in the soaking solution is 15-30 seconds, the number of padding times is 5-10, and the liquid-carrying rate is 100%. If the temperature is too low or the number of dipping and rolling is small, the capillary effect of the product will be poor. If the temperature is too high or the number of dipping and rolling is too many, the breaking strength of the product will be poor.

The preferred water washing process includes four water washings, wherein the temperature of the first and second water washings is 50-60° C., and the temperature of the third and fourth water washings is room temperature.

The beneficial effects of the present invention are:

The main innovation point of the present invention is that it adopts the method of continuously padding the enzyme scouring solution for multiple times on the cotton fabric. The cotton fabric scoured by the invention can reach 15.5cm in capillary effect in 30 minutes, the whiteness is 85, and the strength is excellent. The cotton fabric treated by the method is soft to the touch, has good water absorption, and maintains the original characteristics of the cotton fabric.

The use of continuous padding enzyme scouring method has changed the current situation that the traditional alkali scouring can only be boiled for a long time in the past, and also changed the original enzyme scouring process. Wait for the status quo. The method of the invention is simple, efficient, low temperature, environment-friendly and has a high qualified rate of products.

detailed description

The following clearly and completely describes the technical solutions in the implementation of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

A kind of enzyme refining method based on cotton fabric, comprises the following steps:

1) Desizing the cotton fabric that needs to be scoured.

2) preparing enzyme refining solution, the formulation of the enzyme refining solution is:

3) Control the temperature of the prepared enzyme scouring solution at 50-60° C., and wet the desized cotton fabric at the same time;

4) Padding the wetted cotton fabric in the above-mentioned enzyme scouring solution continuously for 5-10 times, wherein the soaking time of the fabric in the soaking solution is 15-30 seconds, and the liquid-carrying rate is 100%.

5) washing and drying the cotton fabric after the padding treatment.

As a preferred embodiment, the enzyme refining liquid contains 1 g/l cellulase, 1 g/l hemicellulase, 1.5 g/l pectinase, and 1 g/l JFC. It is verified by experiments that the enzyme scouring solution of this composition has the best effect, and the treated cotton fabric has high wool effect, whiteness, tensile strength and soft hand feeling.

As a preferred embodiment, the temperature of the cotton fabric padding solution in step 3 is 55° C., and the fabric dipping solution rate is 100%. If the temperature is too low, the capillary effect of the product will be poor; if the temperature is too high, the breaking strength of the product will be poor. It has been verified that the enzyme refining effect is the best when the impregnating solution temperature is 55°C.

As a preferred embodiment, when the number of continuous padding in step 4 is 4-8, all technical indicators of the treated cotton fabric can obtain satisfactory results.

As a preferred embodiment, the water washing described in step 5 includes four water washings, wherein the temperatures of the first and second water washings are 50-60° C., and the temperatures of the third and fourth water washings are room temperature.

Example 1

The gray cotton fabric is desized by traditional alkali and dried for later use.

Prepare the Enzyme Scouring Solution according to the following formula:

Use 55°C water to prepare the solution, and the temperature of the implementation process is controlled at 55°C;

The desized cotton fabric is wetted, and then padded in the above-mentioned enzyme scouring solution for 5 consecutive times, with a liquid retention rate of 100%. In each padding process, the soaking time of the cotton fabric in the enzyme scouring solution is 20 seconds.

The above-mentioned padded cotton fabric is washed with water for 4 times and dried. Washing conditions: the temperature of the first and second washings is 50-60°C, and the temperature of the third and fourth washings is room temperature.

The treatment effect of embodiment 1 is shown in table 1.

Example 2

The gray cotton fabric is desized by traditional alkali and dried for later use.

Prepare the Enzyme Scouring Solution according to the following formula:

Use 55°C water to prepare the solution, and the temperature of the implementation process is controlled at 55°C;

The desized cotton fabric is wetted, and then padded in the above-mentioned enzyme scouring solution for 10 consecutive times, with a liquid retention rate of 100%. In each padding process, the soaking time of the cotton fabric in the enzyme scouring solution is 20 seconds.

The above-mentioned padded cotton fabric is washed with water for 4 times and dried. Washing conditions: the temperature of the first and second washings is 50-60°C, and the temperature of the third and fourth washings is room temperature.

The treatment effect of embodiment 2 is shown in table 1

Table 1. The treatment effect contrast of the embodiment of the present invention

index Example 1 Example 2 Whiteness (hunter) 85.8 84.6 Capillary effect/(cm/30min) 16.0 15.9 Breaking strength (N) 403.0 350.0

As can be seen from Table 1, adopting the short process scouring treatment process provided by the present invention is applied to the pretreatment of cotton fabrics, and the processed product has a higher quality level, and the product is in whiteness, capillary effect and breaking strength and traditional The refining process index is close.

The short-flow scouring treatment process provided by the invention is applied to the pretreatment of cotton fabrics. Compared with the traditional scouring method, high-temperature scouring is eliminated, the treatment time is greatly shortened, and water and electricity are saved at the same time, and the overall cost is reduced. It is in line with the national industrial policy of energy conservation and emission reduction.

The above is only a preferred example of the present invention, and is not intended to limit the invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention. within.

Claims (4)

1. the enzymatic scouring method based on bafta, it is characterised in that include procedure below:

Preparation enzymatic scouring solution, described enzymatic scouring liquid includes: cellulase, hemicellulase, pectase, penetrating agent JFC；Control enzymatic scouring liquid temp at 45～65 DEG C；Bafta after desizing is padded continuously repeatedly in above-mentioned enzymatic scouring liquid；After finally padding process, bafta carries out washing, drying, and obtains enzyme scouring of cotton textiles finished product。

2. in enzymatic scouring liquid as claimed in claim 1, the consumption of each component is: 0.1～5g/l cellulase, 0.1～5g/l hemicellulase, 0.1～10g/l pectase, 1g/l penetrating agent JFC。

3. the bafta as described in step 3 in claim 1 pads number of times is 2～20 times。

4. as claimed in claim 3, pad the soak time in process is 10～90 seconds every time, and after mangle, bafta liquid carrying rate is: 80～120%。