CN114525673A - Cotton fabric low-temperature scouring and bleaching method beneficial to enhancing deep dyeing performance of coating - Google Patents
Cotton fabric low-temperature scouring and bleaching method beneficial to enhancing deep dyeing performance of coating Download PDFInfo
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- CN114525673A CN114525673A CN202210192183.6A CN202210192183A CN114525673A CN 114525673 A CN114525673 A CN 114525673A CN 202210192183 A CN202210192183 A CN 202210192183A CN 114525673 A CN114525673 A CN 114525673A
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- 238000009991 scouring Methods 0.000 title claims abstract description 121
- 238000004061 bleaching Methods 0.000 title claims abstract description 117
- 239000004744 fabric Substances 0.000 title claims abstract description 93
- 229920000742 Cotton Polymers 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000004043 dyeing Methods 0.000 title claims abstract description 33
- 238000000576 coating method Methods 0.000 title claims abstract description 29
- 239000011248 coating agent Substances 0.000 title claims abstract description 28
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 13
- 230000009286 beneficial effect Effects 0.000 title claims abstract description 12
- 108010010803 Gelatin Proteins 0.000 claims abstract description 62
- 239000007864 aqueous solution Substances 0.000 claims abstract description 62
- 239000003054 catalyst Substances 0.000 claims abstract description 59
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 48
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 48
- 238000011282 treatment Methods 0.000 claims abstract description 48
- 125000002091 cationic group Chemical group 0.000 claims abstract description 40
- 238000009897 hydrogen peroxide bleaching Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 33
- 238000004321 preservation Methods 0.000 claims abstract description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 150000004699 copper complex Chemical class 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 19
- 229920000159 gelatin Polymers 0.000 claims abstract description 16
- 239000008273 gelatin Substances 0.000 claims abstract description 16
- 235000019322 gelatine Nutrition 0.000 claims abstract description 16
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 16
- 230000000051 modifying effect Effects 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 33
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 26
- 239000007787 solid Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 32
- 238000012986 modification Methods 0.000 description 32
- 230000000694 effects Effects 0.000 description 13
- 239000003973 paint Substances 0.000 description 7
- 239000002671 adjuvant Substances 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
- D06L4/13—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen using inorganic agents
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
- D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention discloses a cotton fabric low-temperature scouring and bleaching method beneficial to enhancing the deep dyeing performance of a coating, which comprises the following steps: step 1, preparing a gelatin protein copper complex catalyst, and respectively preparing a hydrogen peroxide bleaching catalyst and a polyethylene glycol aqueous solution; adding a polyethylene glycol aqueous solution into the hydrogen peroxide bleaching catalyst; step 2, preparing a scouring and bleaching aqueous solution, putting the cotton fabric into the scouring and bleaching aqueous solution at room temperature, heating for a certain time, then adding the cationic gelatin auxiliary agent for the first time, carrying out heat preservation treatment, adding sodium hydroxide, and continuing the treatment; adding the cationic gelatin protein auxiliary agent for the second time, and continuing the treatment; then heating and preserving heat; and 3, taking out the fabric, washing with water, and drying to finish the scouring, bleaching and modifying one-bath process. The method realizes one-bath scouring, bleaching and modifying, and has the characteristics of energy conservation, emission reduction and environmental protection.
Description
Technical Field
The invention belongs to the technical field of textile printing and dyeing methods, and relates to a low-temperature scouring and bleaching method for cotton fabrics, which is beneficial to enhancing the deep dyeing performance of a coating.
Background
The coating has no affinity to any fiber, and is adhered to the fabric by the adhesive, so that the coating is suitable for dyeing any fabric, especially for dyeing blended fabric, mixed fabric, etc. As long as the adhesive is properly selected and the color fixing condition is proper, the pigment dyed fabric has the excellent characteristics of less floating color, less dyeing wastewater and the like, and meets the requirement of the current society on environmental protection. However, the textile coating contains a large amount of anionic dispersant, so that the coating mainly exists in the form of anionic micelles in the dye liquor, and a large electrostatic repulsion exists between the anionic micelles and anionic groups on the surfaces of fibers such as cotton, so that the coating is difficult to adsorb on the surfaces of the fibers such as cotton, and the deep dyeing effect of the coating dyed fabric is difficult to obtain. In order to improve the adsorption and dye-uptake performance of the coating on the fabric, the fabric is modified by cationization in a common method, however, after the cotton fabric is scoured and bleached, the cationization modification is carried out, and one working procedure is added, so that the problems of cost increase, production efficiency reduction, energy consumption increase and the like are caused. Considering that before dyeing the cotton fabric, the scouring and bleaching pretreatment must be carried out, so that the scouring and bleaching and the modification are carried out in one bath, the working procedure is shortened, the energy is saved, the emission is reduced, and the production efficiency is improved.
However, in order to realize the same bath of scouring and bleaching and modification, the problem that the scouring and bleaching and modification process conditions are inconsistent must be solved. When alkali-oxygen one-bath scouring and bleaching is generally adopted, the treatment is required under the conditions of high-concentration hydrogen peroxide, high-concentration alkali consumption and high temperature; and the cationic modification needs to be carried out at a lower alkali dosage and a lower temperature, otherwise, the structure of the cationic agent is damaged, and the fabric cannot achieve a good cationic modification effect. When a hydrogen peroxide activating agent or a catalyst is added into the hydrogen peroxide scouring and bleaching bath, the bleaching temperature of hydrogen peroxide can be reduced.
Although a preparation method of a hydrogen peroxide bleaching catalyst is provided in Chinese patent 'a hydrogen peroxide bleaching catalyst' (patent No. ZL201510018299.8, publication No. CN104611906B, published 2016.08.24), the chemical structure of the catalyst is a gelatin protein copper complex, and the catalyst can catalyze hydrogen peroxide to be effectively decomposed and improve the low-temperature bleaching effect of hydrogen peroxide. However, the research on enhancing the deep dyeing performance of the coating by low-temperature catalytic scouring and bleaching and modification in one bath is not seen so far.
Disclosure of Invention
The invention aims to provide a low-temperature scouring and bleaching method for cotton fabrics, which is beneficial to enhancing the deep dyeing performance of a coating, and solves the problems that the prior art is difficult to treat the cotton fabrics in one bath, simultaneously achieves good scouring and bleaching effects and modification effects and realizes deep dyeing of the cotton fabric coating by changing the process conditions of the addition sequence, the treatment temperature and the like of various auxiliary agents in a scouring and bleaching modification bath.
The technical scheme adopted by the invention is that a cotton fabric low-temperature scouring and bleaching method beneficial to enhancing the deep dyeing performance of a coating is implemented according to the following steps:
step 1, preparing a gelatin protein copper complex catalyst,
1.1) preparing a hydrogen peroxide bleaching catalyst;
1.2) preparing a polyethylene glycol aqueous solution;
1.3) adding a polyethylene glycol aqueous solution into a hydrogen peroxide bleaching catalyst, and stirring for 10-20min at 50-60 ℃;
step 2, preparing scouring and bleaching modified solution, scouring and bleaching and modifying cotton fabrics simultaneously,
2.1) preparing scouring and bleaching aqueous solution, putting the cotton fabric into the scouring and bleaching aqueous solution at room temperature, starting to heat up, wherein the heating rate is 7.0-9.9 ℃/min, heating up to 65-75 ℃, and carrying out heat preservation treatment for 5-10 min;
2.2) adding 1-3g/L of cationic gelatin protein auxiliary agent for the first time, and carrying out heat preservation treatment for 5-10 min; then adding 1.5-2.5g/L of sodium hydroxide, and carrying out heat preservation treatment for 15-25 min; adding 4-6g/L of cationic gelatin protein auxiliary agent for the second time, and performing heat preservation treatment for 30-40min, wherein the solution is called a scouring and bleaching modified solution after all the auxiliary agents are added; then heating the scouring and bleaching modified solution to 75-85 ℃ at a heating rate of 7.0-9.9 ℃/min, and carrying out heat preservation treatment for 5-15 min;
and 3, taking out the fabric, washing with water, and drying to finish the scouring, bleaching and modifying one-bath process.
The invention has the advantages that by adjusting the feeding sequence of each auxiliary agent in the scouring and bleaching modification one-bath solution and adding a proper amount of cationic gelatin protein auxiliary agent in the scouring and bleaching modification bath at proper time, the activation effect of the cationic gelatin protein auxiliary agent on scouring and bleaching and the catalytic action of a gelatin protein copper complex catalyst on oxygen bleaching are exerted, the scouring and bleaching effect is ensured, the damage of the cationic gelatin protein auxiliary agent structure in the scouring and bleaching process is reduced, the modification effect of the cationic gelatin protein auxiliary agent on fabrics is fully exerted, namely, the cotton fabrics obtain good scouring, bleaching and modification effects through the scouring and bleaching modification one-bath treatment, so that the adsorption dyeing performance of the treated fabrics on the coating is obviously improved, the problem that the coating is difficult to dye deep color is solved, the coating consumption is greatly saved, simultaneously, the processing procedure is shortened, the effect of energy conservation and emission reduction is achieved, and the scouring and bleaching modification one-bath is realized, has the characteristics of energy conservation, emission reduction and contribution to environmental protection.
Drawings
FIG. 1 is a block diagram of a process for carrying out a scouring and bleaching modification bath by the method of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the specific process flow and process conditions of the low-temperature scouring and bleaching method for cotton fabrics are as follows:
1) solves the problem that the gelatin protein copper complex catalyst is easy to solidify when being prepared in winter (low temperature). Preparing a hydrogen peroxide bleaching catalyst according to a Chinese patent 'a hydrogen peroxide bleaching catalyst' (patent number ZL201510018299.8), adding a polyethylene glycol aqueous solution with a certain concentration into the catalyst solution, and preparing an improved gelatin protein copper complex catalyst for later use;
the preparation method of the gelatin protein copper complex catalyst of the improved version of the invention is as follows: firstly, preparing a hydrogen peroxide bleaching catalyst according to a hydrogen peroxide bleaching catalyst (with the patent number being ZL201510018299.8) in Chinese patent; adding polyethylene glycol aqueous solution into the hydrogen peroxide bleaching catalyst, and stirring at 50-60 deg.C for 10-20 min. The mass ratio of solid polyethylene glycol (polymerization degree 2000) in the polyethylene glycol aqueous solution to solid gelatin is 1-2: 10, the mass ratio of solid polyethylene glycol to water in the polyethylene glycol aqueous solution is 1: 8-12, the dissolving temperature is 50-60 ℃ in the preparation process of the polyethylene glycol aqueous solution, and the dissolving time is 5-10 min.
2) Preparing scouring and bleaching aqueous solution at room temperature (25 +/-5 ℃), and mixing the gelatin protein copper complex catalyst (abbreviated as 'catalyst' in figure 1), penetrating agent, scouring agent,Adding hydrogen peroxide into water to obtain scouring and bleaching aqueous solution, adding the cotton fabric into the scouring and bleaching aqueous solution, heating at a heating rate of 7.0-9.9 deg.C/min to a proper temperature (T)1) Treating for a certain time (t)1) (ii) a Adding proper amount of cationic gelatin protein assistant for the first time, and treating for a certain time (t)2) Adding appropriate amount of sodium hydroxide, and treating for a certain time (t)3) (ii) a Adding a proper amount of cationic gelatin protein auxiliary agent for the second time, and carrying out heat preservation treatment for a certain time (t)4) At the moment, all the scouring and bleaching modification auxiliary agents are added; then, the temperature is rapidly raised to a proper temperature (T)2) Continue processing for a short time (t)5)；
Adding 1-2g/L gelatin protein copper complex catalyst, 1-2g/L penetrant (JFC or other penetrants), 2-3g/L scouring agent (German scouring agent DM1331 or scouring agents of other brands) and 8-12 ml/L30% mass concentration of commercial hydrogen peroxide into water at room temperature, and stirring uniformly to prepare scouring and bleaching water solution; then, soaking the cotton fabric in the scouring and bleaching aqueous solution, wherein the ratio of the mass of the cotton fabric to the volume of the scouring and bleaching aqueous solution is 1 g: 20mL-30mL, rapidly heating (7.0-9.9 ℃/min) from room temperature to 65 ℃ -75 ℃ (namely T)1) Treating for 5-10min (t)1) (ii) a Adding 1-3g/L cationic gelatin protein adjuvant into the water solution for the first time, and keeping the temperature for 5-10min (t)2) (ii) a Adding sodium hydroxide 1.5-2.5g/L, and further treating for 15-25min (t)3) (ii) a Adding appropriate amount of cationic gelatin protein adjuvant 4-6g/L for two times, and heat-insulating for 30-40min (t)4) At the moment, all the scouring and bleaching modification auxiliary agents are added, and the solution is called scouring and bleaching modification solution; then heating the scouring and bleaching modified solution to 75-85 ℃ at a heating rate of 7.0-9.9 ℃/min (T)2) Keeping the temperature for 5-15min (t)5)。
3) And (3) after a series of treatments in the step (2), taking out the fabric from the scouring and bleaching modification solution, washing with water, and drying to finish the scouring and bleaching modification one-bath process.
Referring to fig. 1, based on the above-mentioned treatment process flow, the cotton fabric low-temperature scouring and bleaching method of the invention is implemented according to the following steps:
step 1, preparing a gelatin protein copper complex catalyst,
1.1) preparing a hydrogen peroxide bleaching catalyst, and preparing the hydrogen peroxide bleaching catalyst according to a hydrogen peroxide bleaching catalyst (with the patent number of ZL201510018299.8) in a Chinese patent;
1.2) preparing a polyethylene glycol aqueous solution, wherein the mass ratio of solid polyethylene glycol in the polyethylene glycol aqueous solution to water is 1: 8-12, the dissolving temperature is 50-60 ℃ in the preparation process of the polyethylene glycol aqueous solution, and the dissolving time is 5-10 min; the polymerization degree of the solid polyethylene glycol is 2000;
1.3) adding a polyethylene glycol aqueous solution into the hydrogen peroxide bleaching catalyst, wherein the mass ratio of solid polyethylene glycol in the polyethylene glycol aqueous solution to solid gelatin in the hydrogen peroxide bleaching catalyst is (1-2): stirring for 10-20min at 50-60 ℃.
Step 2, preparing scouring and bleaching modified solution, scouring and bleaching and modifying cotton fabrics simultaneously,
2.1) preparing a scouring and bleaching aqueous solution, simultaneously adding 1-2g/L of gelatin copper complex catalyst, 1-2g/L of penetrating agent, 2-3g/L of scouring agent and 8-12ml/L of 30% hydrogen peroxide into water at room temperature to obtain the scouring and bleaching aqueous solution, and putting cotton fabrics into the scouring and bleaching aqueous solution at room temperature, wherein the ratio of the mass of the cotton fabrics to the volume of the scouring and bleaching aqueous solution is 1 g: 20mL-30mL, starting heating, heating at a rate of 7.0-9.9 ℃/min to 65-75 ℃, and treating for 5-10 min;
2.2) adding 1-3g/L of cationic gelatin protein auxiliary agent for the first time, carrying out heat preservation treatment for 5-10min, adding 1.5-2.5g/L of sodium hydroxide, carrying out heat preservation treatment for 15-25min, adding 4-6g/L of cationic gelatin protein auxiliary agent for the second time, carrying out heat preservation treatment for 30-40min, and finishing adding all the scouring and bleaching modification auxiliary agents; then heating the scouring and bleaching modified solution to 75-85 ℃ at a heating rate of 7.0-9.9 ℃/min, and carrying out heat preservation treatment for 5-15min, wherein in the treatment process, good circulation between the fabric and the scouring and bleaching modified solution is necessarily kept.
And 3, taking out the fabric, washing with water, and drying to finish the scouring, bleaching and modifying one-bath process.
Example 1
The low-temperature scouring and bleaching method for cotton fabrics is applied to scouring and bleaching modification treatment of cotton grey fabrics.
Step 1, preparing a gelatin protein copper complex catalyst,
1.1) preparing a hydrogen peroxide bleaching catalyst, and preparing the hydrogen peroxide bleaching catalyst according to a hydrogen peroxide bleaching catalyst (with the patent number of ZL201510018299.8) in a Chinese patent;
1.2) preparing a polyethylene glycol aqueous solution, wherein the mass ratio of solid polyethylene glycol (polymerization degree 2000) in the polyethylene glycol aqueous solution to water is 1: 8, the dissolving temperature is 50 ℃ and the dissolving time is 10min in the preparation process of the polyethylene glycol aqueous solution;
1.3) adding a polyethylene glycol aqueous solution into the hydrogen peroxide bleaching catalyst, wherein the mass ratio of solid polyethylene glycol in the polyethylene glycol aqueous solution to solid gelatin in the hydrogen peroxide bleaching catalyst is 1: stirring at 10, 60 deg.C for 10 min.
Step 2, preparing scouring and bleaching modification solution, scouring and bleaching and modifying cotton grey cloth,
2.1) preparing scouring and bleaching aqueous solution, simultaneously adding 1g/L of gelatin copper complex catalyst, 1g/L of JFC penetrating agent, 2g/L of Demet scouring agent DM1331 and 10ml/L of 30% hydrogen peroxide into water at room temperature to obtain scouring and bleaching aqueous solution, and adding cotton fabric into the scouring and bleaching aqueous solution at room temperature, wherein the ratio of the mass of the cotton fabric to the volume of the scouring and bleaching aqueous solution is 1 g: heating to 30mL, wherein the heating rate is 9.9 ℃/min, heating to 70 ℃, and carrying out heat preservation treatment for 5 min;
2.2) adding 2g/L of cationic gelatin auxiliary agent for the first time (meanwhile, the embodiment without adding the cationic gelatin auxiliary agent for the first time), carrying out heat preservation treatment for 5min, adding 2g/L of sodium hydroxide, carrying out heat preservation treatment for 20min, adding different amounts of cationic gelatin auxiliary agent for the second time, carrying out heat preservation treatment for 35min, and finishing adding all scouring and bleaching modification auxiliary agents (the solution is called scouring and bleaching modification solution); and then heating the scouring and bleaching modified solution to 80 ℃ at the heating rate of 9.9 ℃/min, and carrying out heat preservation treatment for 10min, wherein in the whole treatment process, the good circulation between the cotton grey cloth and the scouring and bleaching modified solution is necessarily kept.
And 3, taking out the cotton grey cloth, washing with water, and drying to finish the scouring, bleaching and modifying one-bath process.
The results of the measurement of the change in whiteness of treated fabrics and the change in the K/S value of the dyeing depth of red-dyed fabrics treated with coatings on fabrics with the first addition and non-addition of cationic gelatin protein aids and the second addition of different amounts of cationic gelatin protein aids are shown in table 1.
TABLE 1 Effect of cationic gelatin adjuvants on Fabric whiteness and depth of dyeing of paints
As shown in Table 1, the whiteness value of the treated fabric is higher and the dyeing depth value of the treated fabric is increased after the fabric is dyed by the coating material. And with the increase of the dosage of the cationic gelatin protein auxiliary agent added twice (added later), the whiteness of the fabric is not greatly changed, but the K/S value of the dyeing depth of the fabric is obviously improved, and after the fabric is treated by the cationic gelatin protein auxiliary agent of 5g/L and 6g/L and dyed by the paint, the K/S value of the dyeing depth of the fabric is not greatly improved, which indicates that the dosage of the cationic gelatin protein auxiliary agent is not required to be too large. The addition sequence and the treatment temperature of the auxiliary agent can be well controlled to achieve one bath of scouring, bleaching and modification, the adsorption and dyeing performance of the treated fabric on the coating is obviously enhanced, and the problem that the coating is difficult to dye deep color is solved.
Example 2
The low-temperature scouring and bleaching method for cotton fabrics is applied to scouring and bleaching modification treatment of cotton grey fabrics.
Step 1, preparing a gelatin protein copper complex catalyst,
1.1) preparing a hydrogen peroxide bleaching catalyst, and preparing the hydrogen peroxide bleaching catalyst according to a hydrogen peroxide bleaching catalyst (with the patent number of ZL201510018299.8) in a Chinese patent;
1.2) preparing a polyethylene glycol aqueous solution, wherein the mass ratio of solid polyethylene glycol (polymerization degree 2000) in the polyethylene glycol aqueous solution to water is 1: 12, the dissolving temperature is 60 ℃ and the dissolving time is 5min in the preparation process of the polyethylene glycol aqueous solution;
1.3) adding a polyethylene glycol aqueous solution into the hydrogen peroxide bleaching catalyst, wherein the mass ratio of solid polyethylene glycol in the polyethylene glycol aqueous solution to solid gelatin in the hydrogen peroxide bleaching catalyst is 2: stirring at 10, 50 deg.C for 20 min.
Step 2, preparing scouring and bleaching modification solution, scouring and bleaching and modifying cotton grey cloth,
2.1) preparing scouring and bleaching aqueous solution, simultaneously adding 1.5g/L of gelatin copper complex catalyst, 1g/L of JFC penetrating agent, 3g/L of German refining agent DM1331 and 10ml/L of 30% hydrogen peroxide into water at room temperature to obtain the scouring and bleaching aqueous solution, and putting the cotton grey cloth into the scouring and bleaching aqueous solution at room temperature, wherein the ratio of the mass of the cotton grey cloth to the volume of the scouring and bleaching aqueous solution is 1 g: heating to 25mL, wherein the heating rate is 9.9 ℃/min, the heating is carried out to 70 ℃, and the heat preservation treatment is carried out for 10 min;
2.2) adding 1g/L of cationic gelatin protein assistant for the first time, carrying out heat preservation treatment for 10min, adding 2.5g/L of sodium hydroxide, carrying out heat preservation treatment for 20min, adding 5g/L of cationic gelatin protein assistant for the second time, carrying out heat preservation treatment for 35min, and finishing adding all the assistants in the scouring and bleaching modified solution; and then heating the scouring and bleaching modified solution to 75 ℃ at the heating rate of 8 ℃/min, and carrying out heat preservation treatment for 15min, wherein in the whole treatment process, the good circulation between the cotton grey cloth and the scouring and bleaching modified solution is necessarily kept.
And 3, taking out the cotton grey cloth, washing with water, and drying to finish the scouring, bleaching and modifying one-bath process.
This example compares the effect on fabric whiteness and depth of dye in paints without the addition of a cationic gelatin adjuvant for the first time, and the results are shown in Table 2.
TABLE 2 Effect of Pre-addition and non-Pre-addition of cationic gelatin protein auxiliaries on Fabric whiteness and the K/S value of the depth of dyeing Red of paints
As shown in the table 2, the whiteness of the fabric is improved by pre-adding the cationic gelatin protein assistant compared with the whiteness of the fabric without pre-adding the cationic gelatin protein assistant, and the pre-adding of a small amount of the cationic gelatin protein assistant is also favorable for improving the adsorption dye-uptake of the fabric to the paint and improving the dyeing depth K/S value of the fabric, and the pre-adding of a small amount of the cationic gelatin protein assistant and the adding of a proper amount of the cationic gelatin protein assistant after the alkali treatment further improve the dyeing depth K/S value of the fabric paint and is favorable for deep heavy dyeing of the paint. Supplementary experiments show that if 5g/L of cationic gelatin protein auxiliary agent is added in advance, and 2.5g/L of sodium hydroxide is added to perform scouring, bleaching and modifying treatment, although the whiteness of the cotton grey cloth is as high as 80.1, the depth value of the cotton grey cloth pigment dyeing is not high and is only 3.723. The addition sequence of the auxiliary agent has great influence on the scouring, bleaching and modifying effects of the fabric.
Example 3
The invention discloses a low-temperature scouring and bleaching method for cotton fabrics, which is applied to scouring and bleaching modification treatment of cotton grey fabrics.
Step 1, preparing a gelatin protein copper complex catalyst,
1.1) preparing a hydrogen peroxide bleaching catalyst, and preparing the hydrogen peroxide bleaching catalyst according to a hydrogen peroxide bleaching catalyst (with the patent number of ZL201510018299.8) in a Chinese patent;
1.2) preparing a polyethylene glycol aqueous solution, wherein the mass ratio of solid polyethylene glycol (polymerization degree 2000) in the polyethylene glycol aqueous solution to water is 1: 10, the dissolving temperature is 55 ℃ and the dissolving time is 7min in the preparation process of the polyethylene glycol aqueous solution;
1.3) adding a polyethylene glycol aqueous solution into the hydrogen peroxide bleaching catalyst, wherein the mass ratio of solid polyethylene glycol in the polyethylene glycol aqueous solution to solid gelatin in the hydrogen peroxide bleaching catalyst is 1.5: stirring at 10 and 55 ℃ for 15 min.
Step 2, preparing scouring and bleaching modification solution, scouring and bleaching and modifying cotton grey cloth,
2.1) preparing scouring and bleaching aqueous solution, simultaneously adding 1g/L of gelatin copper complex catalyst, 2g/L of JFC penetrating agent, 2g/L of German refining agent DM1331 and 10ml/L of 30% hydrogen peroxide into water at room temperature to obtain scouring and bleaching aqueous solution, and adding cotton grey cloth into the scouring and bleaching aqueous solution at room temperature, wherein the ratio of the mass of the cotton grey cloth to the volume of the scouring and bleaching aqueous solution is 1 g: heating to 30mL, wherein the heating rate is 8 ℃/min, heating to 65 ℃, and carrying out heat preservation treatment for 10 min;
2.2) adding 3g/L of cationic gelatin protein auxiliary agent for the first time, carrying out heat preservation treatment for 5min, adding 1.5g/L of sodium hydroxide, carrying out heat preservation treatment for 25min, adding 6g/L of cationic gelatin protein auxiliary agent for the second time, carrying out heat preservation treatment for 30min, and finishing adding all the auxiliary agents in the scouring and bleaching modification solution; and then heating the scouring and bleaching modified solution to 85 ℃ at the heating rate of 7.0 ℃/min, and carrying out heat preservation treatment for 15min, wherein in the whole treatment process, the good circulation between the cotton grey cloth and the scouring and bleaching modified solution is necessarily kept.
And 3, taking out the cotton grey cloth, washing with water, and drying to finish the scouring, bleaching and modifying one-bath process.
Through measurement, the whiteness of the finally obtained cotton fabric is 75.5, and the red dyeing depth K/S value of the cotton fabric coating is 12.211.
Claims (6)
1. A cotton fabric low-temperature scouring and bleaching method beneficial to enhancing the deep dyeing performance of a coating is characterized by comprising the following steps:
step 1, preparing a gelatin protein copper complex catalyst,
1.1) preparing a hydrogen peroxide bleaching catalyst;
1.2) preparing a polyethylene glycol aqueous solution;
1.3) adding a polyethylene glycol aqueous solution into a hydrogen peroxide bleaching catalyst, and stirring for 10-20min at 50-60 ℃;
step 2, preparing scouring and bleaching modified solution, simultaneously scouring, bleaching and modifying cotton fabrics,
2.1) preparing scouring and bleaching aqueous solution, putting the cotton fabric into the scouring and bleaching aqueous solution at room temperature, starting to heat up, wherein the heating rate is 7.0-9.9 ℃/min, heating up to 65-75 ℃, and carrying out heat preservation treatment for 5-10 min;
2.2) adding 1-3g/L of cationic gelatin protein auxiliary agent for the first time, and carrying out heat preservation treatment for 5-10 min; then adding 1.5-2.5g/L of sodium hydroxide, and carrying out heat preservation treatment for 15-25 min; adding 4-6g/L of cationic gelatin protein auxiliary agent for the second time, and performing heat preservation treatment for 30-40min, wherein the solution is called a scouring and bleaching modified solution after all the auxiliary agents are added; then heating the scouring and bleaching modified solution to 75-85 ℃ at a heating rate of 7.0-9.9 ℃/min, and carrying out heat preservation treatment for 5-15 min;
and 3, taking out the fabric, washing with water, and drying to finish the scouring, bleaching and modifying one-bath process.
2. The low-temperature scouring and bleaching method for cotton fabrics, which is beneficial to enhancing the deep dyeing property of the coating, according to claim 1, is characterized in that: in the step 1.1), the hydrogen peroxide bleaching catalyst is prepared according to the Chinese patent of a hydrogen peroxide bleaching catalyst with the patent number of ZL 201510018299.8.
3. The low-temperature scouring and bleaching method for cotton fabrics, which is beneficial to enhancing the deep dyeing property of the coating, according to claim 1, is characterized in that: in the step 1.2), the polymerization degree of the solid polyethylene glycol is 2000, and the mass ratio of the solid polyethylene glycol to water in the polyethylene glycol aqueous solution is 1: 8-12, the dissolving temperature is 50-60 ℃ in the preparation process of the polyethylene glycol aqueous solution, and the dissolving time is 5-10 min.
4. The low-temperature scouring and bleaching method for cotton fabrics, which is beneficial to enhancing the deep dyeing property of the coating, according to claim 1, is characterized in that: in the step 1.3), the mass ratio of the solid polyethylene glycol in the polyethylene glycol aqueous solution to the solid gelatin in the hydrogen peroxide bleaching catalyst is 1-2: 10.
5. the low-temperature scouring and bleaching method for cotton fabrics, which is beneficial to enhancing the deep dyeing property of the coating, according to claim 1, is characterized in that: in the step 2.1), 1-2g/L of gelatin protein copper complex catalyst, 1-2g/L of penetrating agent, 2-3g/L of scouring agent and 8-12ml/L of 30% hydrogen peroxide are simultaneously added into water at room temperature to obtain scouring and bleaching water solution.
6. The low-temperature scouring and bleaching method for cotton fabrics, which is beneficial to enhancing the deep dyeing property of the coating, according to claim 1, is characterized in that: in the step 2.1), the ratio of the mass of the cotton fabric to the volume of the scouring and bleaching aqueous solution is 1 g: 20mL-30 mL.
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