A cleaning, energy-saving and emission-reducing pretreatment method for home textile fabrics

Abstract

The invention discloses a cleaning energy-saving and emission-reduction pre-treatment method for home textile fabrics, comprising the following steps: padding enzyme solution → room temperature stacking → padding oxygen bleaching solution → plasma bleaching; the enzyme solution includes a composite enzyme of amylase and PVA enzyme and alkaline pectinase, the stacking time is 6-8h, the oxygen bleaching solution includes nano titanium dioxide, pH regulator and hydrogen peroxide, the pH value of the oxygen bleaching solution is 7-8, the power of the plasma bleaching is 80-100w, the time is 2-4min, the atmosphere is a mixed gas of oxygen and argon, and the device of the plasma bleaching bleaches the home textile fabrics in a positive and negative manner. Plasma bleaching is conducive to activating hydrogen peroxide under neutral conditions to bleach fabrics without chemical activators, steaming, energy saving and emission reduction, and at the same time, ultraviolet light will be generated in the plasma treatment, which is conducive to the photocatalytic bleaching of nano titanium dioxide in the bleaching prescription.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabric processing, and in particular to a cleaning, energy-saving and emission-reducing pre-treatment method for home textile fabrics. Background Art

[0002] With the increasing requirements for environmental protection, energy conservation and emission reduction have become the development direction of traditional dyeing and finishing. Pure cotton grey fabrics undergo desizing and scouring to remove impurities such as weaving sizing and pectin, cotton wax, etc. on cotton fibers. However, the pigments of cotton fibers after desizing and scouring have not been removed, and the color of cotton fabrics turns yellow, which affects the brightness and color of subsequent dyed fabrics and cannot meet consumers' requirements for aesthetics.

[0003] In the reference "Study on Bio-enzyme Cold Pad-batch Pretreatment Process of Cotton Fabric" (Printing and Dyeing, 2005, No. 7), the oxygen bleaching process uses 20-25g / L of 30% H2O2, 8-12g / L of Na2SiO2, 3g / L of penetrant TL, 3g / L of penetrant TX, 1g / L of NaOH, and steaming at 98-100℃ for 60min.

[0004] The above-mentioned traditional bleaching process is steam bleaching with hydrogen peroxide in an alkaline environment, which consumes energy and alkali and is not conducive to energy conservation and emission reduction. Although there have been recent reports on low-temperature bleaching with hydrogen peroxide, it is necessary to add an auxiliary agent for chemically activating hydrogen peroxide. With the country's emphasis on clean, green, energy-saving and emission-reduction in the printing and dyeing industry, it is urgent to develop an environmentally friendly low-temperature energy-saving and emission-reduction bleaching technology. Summary of the invention

[0005] The object of the present invention is to provide a cleaning, energy-saving and emission-reducing pretreatment method for home textile fabrics to solve one or more of the above-mentioned prior art problems.

[0006] The invention provides a cleaning, energy-saving and emission-reducing pretreatment method for home textile fabrics, comprising the following steps: padding enzyme solution→stacking at room temperature→padding oxygen bleaching solution→plasma bleaching; the enzyme solution comprises a composite enzyme of amylase and PVA enzyme and alkaline pectinase, the stacking time is 6-8h, the oxygen bleaching solution comprises nano titanium dioxide, a pH regulator and 30% hydrogen peroxide by mass, the pH value of the oxygen bleaching solution is 7-8, the power of the plasma bleaching is 80-100w, the time is 2-4min, the atmosphere is a mixed gas of oxygen and argon, and the plasma bleaching device bleaches the home textile fabrics in a forward and reverse manner.

[0007] In some embodiments, the concentration of the complex enzyme of amylase and PVA enzyme in the enzyme solution is 1 g / L, and the concentration of the alkaline pectinase is 0.2-0.4 g / L.

[0008] In some embodiments, the mass ratio of amylase to PVA enzyme in the composite enzyme of amylase and PVA enzyme is 1:1-1:2.

[0009] In some embodiments, the concentration of nano titanium dioxide in the oxygen bleaching solution is 8-10 g / L, the pH regulator is sodium carbonate-sodium bicarbonate regulator, and the concentration of hydrogen peroxide is 10-15 g / L.

[0010] In some embodiments, the particle size of the nano-titanium dioxide used is 25 nm.

[0011] In some embodiments, the liquid carrying rate of the home textile fabric after the padding oxygen bleaching liquid treatment is 80%-90%.

[0012] In some embodiments, the method further comprises washing the home textile fabrics after being piled in the greenhouse with hot water for three times at 95° C. and with cold water for three times before padding with the oxygen bleaching liquid.

[0013] In some embodiments, the flow rate of oxygen in the mixed gas is 0.2-0.40 L / min, and the flow rate of argon is 20-40 L / min.

[0014] In some embodiments, the plasma bleaching device includes at least a high-voltage electrode, a silicone sealing strip, a quartz glass plate and a grounding electrode arranged in sequence from top to bottom, the textile fabric is placed between the silicone sealing strip and the quartz glass plate, and the mixed gas is passed into the space between the silicone sealing strip and the quartz glass plate through a first pipe and a second pipe respectively.

[0015] Beneficial effects of the present invention:

[0016] 1. The innovation of the present invention is to use plasma technology to activate hydrogen peroxide instead of chemical activators, which does not require steaming, saves energy and reduces emissions. At the same time, plasma bleaching is conducive to activating hydrogen peroxide to bleach fabrics under neutral conditions. In addition, ultraviolet light will be generated during plasma treatment, which is conducive to the photocatalytic bleaching of nano-titanium dioxide in the bleaching prescription.

[0017] 2. The plasma bleaching time of the present invention is short, which improves the bleaching efficiency. At the same time, due to the modification effect of plasma on the front and back sides of the fiber, the dyeing depth of the subsequent dyed fabric is improved, and the amount of dye required to achieve the same dyeing depth is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a plasma bleaching device in one embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the examples. The following examples are only used to more clearly illustrate the performance of the present invention, and are not limited to the following examples.

[0020] Example 1

[0021] A cleaning, energy-saving and emission-reducing pretreatment method for home textile fabrics, comprising the following steps: padding enzyme solution → room temperature stacking → padding oxygen bleaching solution → plasma bleaching; the enzyme solution comprises a composite enzyme of 0.5g / L amylase and 0.5g / L PVA enzyme and 0.2g / L alkaline pectinase, the stacking time is 8h, the oxygen bleaching solution comprises 8g / L nano titanium dioxide, sodium carbonate-sodium bicarbonate regulator and 10g / L 30% hydrogen peroxide, the pH value of the oxygen bleaching solution is 7-8, the liquid carrying rate of the home textile fabric after padding oxygen bleaching solution treatment is 80%, the power of the plasma bleaching is 80w, the time is 4min, the atmosphere is a mixed gas of oxygen and argon, the flow rate of oxygen in the mixed gas is 0.2L / min, and the flow rate of argon is 20L / min. The plasma bleaching device bleaches the home textile fabric in a forward and reverse manner;

[0022] Among them, Figure 1 As shown, the plasma bleaching device at least includes a high-voltage electrode 10, a silicone sealing strip 20, a quartz glass plate 30 and a grounding electrode 40 arranged in sequence from top to bottom, the textile fabric 50 is placed between the silicone sealing strip 20 and the quartz glass plate 30, and the mixed gas is respectively introduced into the space between the silicone sealing strip 20 and the quartz glass plate 30 through a first pipe 61 and a second pipe 62.

[0023] Example 2

[0024] A cleaning, energy-saving and emission-reducing pretreatment method for home textile fabrics comprises the following steps: padding enzyme solution → room temperature stacking → padding oxygen bleaching solution → plasma bleaching; the enzyme solution comprises 0.33g / L amylase and 0.66g / LPVA enzyme compound enzyme and 0.4g / L alkaline pectinase, the stacking time is 6h, the oxygen bleaching solution comprises 10g / L nano titanium dioxide, sodium carbonate-sodium bicarbonate regulator and 15g / L 30% hydrogen peroxide, the pH value of the oxygen bleaching solution is 7-8, the liquid carrying rate of the home textile fabric after padding oxygen bleaching solution treatment is 90%, the power of the plasma bleaching is 100w, the time is 2min, the atmosphere is a mixed gas of oxygen and argon, the flow rate of oxygen in the mixed gas is 0.40L / min, and the flow rate of argon is 40L / min. The plasma bleaching device bleaches the home textile fabric in a forward and reverse manner.

[0025] Example 3

[0026] A clean, energy-saving and emission-reducing pretreatment method for home textile fabrics comprises the following steps: padding enzyme solution → room temperature stacking → padding oxygen bleaching solution → plasma bleaching; the enzyme solution comprises a composite enzyme of 0.4 g / L amylase and 0.6 g / L PVA enzyme and 0.3 g / L alkaline pectinase, the stacking time is 7 hours, the oxygen bleaching solution comprises 9 g / L nano titanium dioxide, sodium carbonate-sodium bicarbonate regulator and 12 g / L 30% hydrogen peroxide, the pH value of the oxygen bleaching solution is 7-8, the liquid carrying rate of the home textile fabric after padding oxygen bleaching solution treatment is 85%, the power of the plasma bleaching is 90 W, the time is 3 minutes, the atmosphere is a mixed gas of oxygen and argon, the flow rate of oxygen in the mixed gas is 0.3 L / min, and the flow rate of argon is 30 L / min. The plasma bleaching device bleaches the home textile fabric in a forward and reverse manner.

[0027] Comparative Example 1:

[0028] A clean, energy-saving and emission-reducing pretreatment method for home textile fabrics comprises the following steps: padding enzyme solution→stacking at room temperature→padding oxygen bleaching solution; the enzyme solution comprises a composite enzyme of 0.5 g / L amylase and 0.5 g / L PVA enzyme and 0.2 g / L alkaline pectinase, the stacking time is 8 hours, the oxygen bleaching solution comprises 8 g / L nano titanium dioxide, sodium carbonate-sodium bicarbonate regulator and 10 g / L hydrogen peroxide with a mass fraction of 30%, and the pH value of the oxygen bleaching solution is 7-8.

[0029] The difference between Comparative Example 1 and Example 1 is that the home textile fabric is not subjected to plasma bleaching treatment after oxygen bleaching.

[0030] Comparative Example 2:

[0031] Experimental steps of prior art:

[0032] Double dipping and double rolling in enzyme solution (50-65℃, liquid rate 70-80%) → rolling and stacking at room temperature → three washes at 95℃ hot water → three washes with cold water → dipping and rolling in hydrogen peroxide → steaming (50-65℃, 1h) → three washes at 95℃ hot water → three washes with cold water.

[0033] The enzyme rolling pile decoction process uses 2g / L L-2000 amylase, 0.5g / L Bioprep3000L pectinase, 2-4g / L penetrant TX, 5-10g / L urea, and piles for 4-8h. The oxygen bleaching process uses 20-25g / L 30% H2O2, 8-12g / L Na2SiO2, 3g / L penetrant TL, 3g / L penetrant TX, 1g / L NaOH, and steams at 98-100℃ for 60min.

[0034] Comparative Example 3:

[0035] A clean, energy-saving and emission-reducing pretreatment method for home textile fabrics comprises the following steps: padding enzyme solution→stacking at room temperature→padding oxygen bleaching solution→plasma bleaching; the enzyme solution comprises a composite enzyme of 0.5 g / L amylase and 0.5 g / L PVA enzyme and 0.2 g / L alkaline pectinase, the stacking time is 8 hours, the oxygen bleaching solution comprises a sodium carbonate-sodium bicarbonate regulator and 10 g / L hydrogen peroxide with a mass fraction of 30%, the pH value of the oxygen bleaching solution is 7-8, the liquid carrying rate of the home textile fabric after padding oxygen bleaching solution treatment is 80%, the power of the plasma bleaching is 80 W, the time is 4 minutes, the atmosphere is a mixed gas of oxygen and argon, the flow rate of oxygen in the mixed gas is 0.2 L / min, the flow rate of argon is 20 L / min, and the plasma bleaching device bleaches the home textile fabric in a forward and reverse manner.

[0036] The difference between Comparative Example 3 and Example 1 is that no nano titanium dioxide is added to the oxygen bleaching liquid.

[0037] Performance Test:

[0038] 1. Whiteness

[0039] The whiteness is measured on a WSD-Ⅲ whiteness meter according to the standard method of GB 8425-1987.

[0040] 2. Gross effect

[0041] First, calibrate the horizontal position of the capillary effect tester and adjust the ruler so that the zero point of the ruler is aligned with the surface of the water tank. Then take the sample and cut it into two strips of 30cm in the warp direction and 5cm in the weft direction. Attach a 2-3g weight to one end and clamp the other end on the iron clamp of the instrument. Let the cloth droop naturally into the water and record the time. After 30 minutes, observe the height of the cloth wetted by the water. If there is any unevenness, read the lowest value and take the average value of the two cloth samples as the test data.

[0042] 3. Color depth of subsequent dyeing

[0043] The bleached home textile fabrics of Examples 1-3 and Comparative Examples 1-2 were jig-dyed, and the color depth K / S value was detected.

[0044] Among them, the jig dyeing method is: feeding one time (dye 1%) → rotating one time → rotating at 25℃ one time → 40℃ sodium sulfate 60g / L two times → 40℃ soda ash 20g / L two times → 65℃ color fixation two times → spraying one time → washing one time → neutralization two times → neutralization two times → soaping at 95℃ (acid soaping agent 3g / L) two times → washing at 90℃ one time → cold water out of the vat

[0045] K / S value test: Use a computer colorimeter to test the K / S value on the fabric surface, and take multiple points to calculate the average value.

[0046] The effects of Examples 1-3 and Comparative Example 1 on the pre-treatment effect are shown in the following table:

[0047]

[0048] From the above results, we can see that:

[0049] Compared with comparative example 1, after plasma bleaching treatment, compared with home textile fabrics treated with oxygen bleaching but not subjected to plasma bleaching treatment, Example 1 has a whiteness of 86.4 at best, and the subsequent dyeing depth is increased by about 17% compared with the traditional process. The advantage of the plasma bleaching of the present invention is that the color depth of subsequent dyeing is increased, which is not available or very rare in conventional bleaching.

[0050] Compared with comparative example 2, after plasma bleaching, the whiteness of Example 1 increases by 1.9 compared with the traditional strong alkali steaming, and the present application does not need to use strong alkali steaming.

[0051] Compared with Comparative Example 3, in Example 1, since nano titanium dioxide is added to the oxygen bleaching solution, ultraviolet light is generated during the plasma treatment, which is beneficial to the photocatalytic bleaching of the nano titanium dioxide in the bleaching prescription, and its whiteness increases by 1.7 compared with that without adding nano titanium dioxide.

[0052] In summary: the present invention uses plasma technology to activate hydrogen peroxide instead of chemical activators, does not require steaming, saves energy and reduces emissions, and at the same time, plasma bleaching is conducive to activating hydrogen peroxide to bleach fabrics under neutral conditions. In addition, ultraviolet light will be generated during plasma treatment, which is conducive to the photocatalytic bleaching of nano titanium dioxide in the bleaching prescription. The plasma bleaching time is short, which improves the bleaching efficiency. At the same time, due to the modification effect of plasma on the front and back sides of the fiber, the dyeing depth of the fiber in the subsequent dyeing is improved, and the amount of dye required to achieve the same dyeing depth is reduced.

[0053] The above description is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, and these should also be regarded as within the scope of protection of the present invention.

Claims

1. A pretreatment method for cleaning, energy saving and emission reduction of home textile fabrics, characterized in that: The following steps are involved: Padding enzyme solution→stacking at room temperature→padding oxygen bleaching solution→plasma bleaching; the enzyme solution includes a composite enzyme of amylase and PVA enzyme and alkaline pectinase, the stacking time is 6-8h, the oxygen bleaching solution includes nano titanium dioxide, a pH regulator and 30% hydrogen peroxide, the pH value of the oxygen bleaching solution is 7-8, the power of the plasma bleaching is 80-100w, the time is 2-4min, the atmosphere is a mixed gas of oxygen and argon, the plasma bleaching device bleaches the home textile fabric in a forward and reverse manner, and the liquid carrying rate of the home textile fabric after the padding oxygen bleaching solution treatment is 80%-90%; The plasma bleaching device at least comprises a high-voltage electrode, a silicone sealing strip, a quartz glass plate and a grounding electrode which are arranged in sequence from top to bottom; the home textile fabric is placed between the silicone sealing strip and the quartz glass plate; and the mixed gas is respectively introduced into the space between the silicone sealing strip and the quartz glass plate through a first pipe and a second pipe.

2. The method for cleaning, energy saving and emission reduction of home textile fabrics according to claim 1, characterized in that: The concentration of the complex enzyme of amylase and PVA enzyme in the enzyme solution is 1 g / L, and the concentration of the alkaline pectinase is 0.2-0.4 g / L.

3. A cleaning, energy-saving and emission-reducing pretreatment method for home textile fabrics according to claim 2, characterized in that: The mass ratio of amylase to PVA enzyme in the composite enzyme of amylase and PVA enzyme is 1:1-1:

2.

4. The method for cleaning, energy saving and emission reduction of home textile fabrics according to claim 1, characterized in that: The concentration of nano titanium dioxide in the oxygen bleaching solution is 8-10 g / L, the pH regulator is sodium carbonate-sodium bicarbonate regulator, and the concentration of hydrogen peroxide is 10-15 g / L.

5. A cleaning, energy-saving and emission-reducing pretreatment method for home textile fabrics according to claim 4, characterized in that: The particle size of the nano titanium dioxide used is 25 nm.

6. The method for cleaning, energy saving and emission reduction of home textile fabrics according to claim 1, characterized in that: The method further comprises washing the home textile fabrics after being piled in the greenhouse with hot water at 95° C. for three times and with cold water for three times before padding with oxygen bleaching liquid.

7. The method for cleaning, energy saving and emission reduction of home textile fabrics according to claim 1, characterized in that: The flow rate of oxygen in the mixed gas is 0.2-0.40 L / min, and the flow rate of argon is 20-40 L / min.

Images