CN115821568A - Flexible pretreatment process for pure cotton gauze - Google Patents
Flexible pretreatment process for pure cotton gauze Download PDFInfo
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- CN115821568A CN115821568A CN202211661013.4A CN202211661013A CN115821568A CN 115821568 A CN115821568 A CN 115821568A CN 202211661013 A CN202211661013 A CN 202211661013A CN 115821568 A CN115821568 A CN 115821568A
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000009835 boiling Methods 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 238000004061 bleaching Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000005406 washing Methods 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 23
- 238000006386 neutralization reaction Methods 0.000 claims description 20
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000012224 working solution Substances 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 229920002125 Sokalan® Polymers 0.000 claims description 6
- MRUAUOIMASANKQ-UHFFFAOYSA-N cocamidopropyl betaine Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O MRUAUOIMASANKQ-UHFFFAOYSA-N 0.000 claims description 6
- 229940073507 cocamidopropyl betaine Drugs 0.000 claims description 6
- 235000019387 fatty acid methyl ester Nutrition 0.000 claims description 6
- 239000004584 polyacrylic acid Substances 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000005227 alkyl sulfonate group Chemical group 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 229920001277 pectin Polymers 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 235000012343 cottonseed oil Nutrition 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 7
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002201 Oxidized cellulose Polymers 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229940107304 oxidized cellulose Drugs 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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- Detergent Compositions (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a flexible pretreatment process for pure cotton gauze, which utilizes a low-alkali and Soft-KA pretreatment agent and adopts a one-bath boiling and bleaching process to finish the flexible pretreatment production of the gauze. The process has the advantages of short process flow, mild boiling and bleaching reaction, effective retention of natural cotton wax, removal of cottonseed hulls, pectic substances and other symbiotic impurities, effective retention of the natural cotton wax, soft hand feeling, high production efficiency, high whiteness of gauze after boiling and bleaching, and high breaking strength; the COD value of the discharged waste liquid is greatly reduced compared with the conventional process, the sewage treatment cost is low, and the low-carbon environmental protection development is met.
Description
Technical Field
The invention belongs to the technical field of textile printing and dyeing pretreatment, and particularly relates to a flexible pretreatment process for pure cotton gauze.
Background
The cotton gauze is a cotton fabric with sparse warps and wefts and has obvious grids. The gauze has various varieties and wide application, and is highly popular with consumers along with the improvement of living conditions of people, and pure cotton gauze products which are healthy, natural, soft, white, comfortable and environment-friendly are advocated.
The mature cotton fiber mainly comprises cellulose and non-cellulose impurities, wherein the non-cellulose impurities comprise 6-10% of pectin, wax, nitrogenous substances, pigments, ash and the like, and are distributed on the primary cell wall layer of the cotton fiber, so that the surface of the cotton fabric shows hydrophobic property, and the cotton fabric is not beneficial to subsequent processing and use. Therefore, in order to remove non-cellulose impurities of cotton fabrics and improve the wettability of cotton gauze, the cotton gauze needs to be pretreated.
The traditional cotton gauze pretreatment process is finished by boiling and bleaching by a high-temperature high-alkali two-bath method, the alkali consumption is high, and if the process conditions are not controlled properly, cotton fibers are easy to form oxidized cellulose, so that the strength is damaged; in addition, the wax on the surface of the cotton fiber is removed cleanly, the gauze can lose the soft hand feeling, is folded unevenly, and has rough edges and exposed stubble. In addition, because the strong base is used for boiling and bleaching, the energy consumption and the water consumption are large in the production process, the COD value of the discharged waste liquid is higher, and the sewage treatment cost is high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a flexible pretreatment process for pure cotton gauze, which utilizes a low-alkali and Soft-KA pretreatment agent and adopts a one-bath boiling and bleaching process to finish the flexible pretreatment production of the gauze. The invention has short process flow, mild boiling and bleaching reaction, effective retention of natural cotton wax, soft hand feeling of the gauze, good whiteness, no odor and no odor, no phenomenon of rough edges and stubble, and flat folded gauze pieces.
The invention discloses a flexible pretreatment process of pure cotton gauze, which comprises the following steps:
(1) Putting gauze into a vat: putting cotton gauze into a high-temperature high-pressure boiling cylinder;
(2) Feeding: adding boiling and bleaching working solution into the boiling cylinder at normal temperature;
(3) Heating and preserving heat: heating the working solution to 95-98 ℃, preserving the temperature for 45-60 min, and discharging the working solution;
(4) Hot water washing: adding warm water of 40-50 ℃, heating to 80 ℃, washing for 10min, and discharging liquid;
(5) Secondary cold water washing: adding normal temperature water, washing for 7min each time, and discharging liquid;
(6) Neutralization and washing: adding citric acid accounting for 0.2-0.5% of the weight of the gauze for neutralization and washing for 15min, and discharging the neutralization solution when the pH of the neutralization solution is 5.5-6.5;
(7) And (5) taking the gauze out of the vat and drying.
In the step (2), the boiling and bleaching working solution is a mixed solution formed by compounding a Soft-KA pretreatment agent, 98% of sodium hydroxide and 27.5% of hydrogen peroxide.
Further, the amount of the Soft-KA pretreatment agent is 1.8 to 2.2% o.w.f, the amount of 98% sodium hydroxide is 1.0 to 2.7% o.w.f, and the amount of 27.5% hydrogen peroxide is 6.5 to 8.5% o.w.f.
The Soft-KA pretreatment agent comprises the following raw materials in percentage by mass:
10-15% of fatty acid methyl ester ethoxylate FMEE (Shanghai Xihe Fine chemical Co., ltd.), 15-20% of secondary alkyl sodium sulfonate (Germany Kelain Co., ltd.), 5-10% of cocamidopropyl betaine (Suzhou Yuantui chemical Co., ltd.), 3-5% of polyacrylic acid (Henan Qing Yuan Tech science and technology Co., ltd.), 5-8% of block polyether L-61 (Nantong Xihe Gegen chemical Co., ltd.), and the balance of water.
The Soft-KA pretreatment agent is prepared by the following method:
(1) Firstly, slowly adding the block polyether L-61 into water, stirring at the speed of 200-300 r/min for 5-10 min;
(2) Adding sodium secondary alkyl sulfonate and cocamidopropyl betaine into the system, stirring at the speed of 100-200 r/min for 5-10 min;
(3) Adding fatty acid methyl ester ethoxylate FMEE and polyacrylic acid into the system, stirring at the speed of 50-60 r/min for 10-15 min, filtering and discharging to obtain the Soft-KA pretreatment agent.
The invention has short process flow, adopts low-alkali Soft-KA pretreatment agent of the eastern Meijie company, has mild boiling and bleaching reaction, effectively retains natural cotton wax, has Soft gauze hand feeling, good whiteness, high breaking strength, smooth folding of gauze pieces and no phenomena of rough edges and stubble. The process has high production efficiency, greatly reduces the COD value of the discharged waste liquid compared with the conventional process, has low sewage treatment cost, and accords with the development of low carbon and environmental protection.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific examples.
Example 1: preparation of Soft-KA pretreatment agent
The raw materials comprise the following components in percentage by weight: 10% of fatty acid methyl ester ethoxylate FMEE, 20% of secondary alkyl sodium sulfonate, 5% of cocamidopropyl betaine, 3% of polyacrylic acid, L-615% of block polyether and the balance of water.
The preparation method of the Soft-KA pretreatment agent.
(1) Firstly, slowly adding the block polyether L-61 into water, and stirring for 10min at the stirring speed of 200 revolutions per minute;
(2) Adding sodium secondary alkyl sulfonate and cocamidopropyl betaine, stirring at 100 rpm for 10min;
(3) Adding fatty acid methyl ester ethoxylate FMEE and polyacrylic acid, stirring at the speed of 60 r/min for 15min, filtering and discharging to obtain Soft-KA pretreatment agent.
Example 2:
a flexible pretreatment process for pure cotton gauze specifically comprises the following steps:
(1) Putting gauze into a cylinder: loading 1800kg of 40 pieces of 29 by 22.3 by 122 pure cotton gauze blank cloth into a high-temperature high-pressure boiling cylinder;
(2) Feeding: at normal temperature, 36kg of a Soft-KA pretreatment agent (diluted with water 1: 1;
(3) Heating and preserving heat: heating the working solution to 98 ℃, preserving the heat for 50min, and discharging the working solution;
(4) Hot water washing: adding 40 deg.C warm water, heating to 80 deg.C, washing with water for 10min, and discharging liquid;
(5) Secondary cold water washing: adding normal temperature water, washing for 7min each time, and discharging liquid;
(6) Neutralization and washing: adding 5kg of citric acid for neutralization washing for 15min, and discharging the neutralization solution when the pH of the neutralization solution is 6.5;
(7) And (5) taking the gauze out of the vat and drying.
The flexible gauze pretreated by the process has the following main technical indexes:
example 3:
a flexible pretreatment process for pure cotton gauze specifically comprises the following steps:
(1) Putting gauze into a vat: putting 1600kg of 40 pieces of 24.4X 15.7X 158 pure cotton gauze blank cloth into a high-temperature high-pressure boiling cylinder;
(2) Feeding: at normal temperature, 30kg of a Soft-KA pretreatment agent (diluted with water 1: 1;
(3) Heating and preserving heat: heating the working solution to 98 ℃, preserving the heat for 50min, and discharging the working solution;
(4) Hot water washing: adding 40 deg.C warm water, heating to 80 deg.C, washing with water for 10min, and discharging liquid;
(5) Secondary cold water washing: adding normal temperature water, washing for 7min each time, and discharging liquid;
(6) Neutralization and washing: adding 4kg of citric acid for neutralization and washing for 15min, and discharging the neutralization solution when the pH of the neutralization solution is 6.5;
(7) And (5) taking the gauze out of the vat and drying.
The flexible gauze pretreated by the process has the following main technical indexes:
example 4:
a flexible pretreatment process for pure cotton gauze specifically comprises the following steps:
(1) Putting gauze into a vat: placing 2500kg of 22, 29, 24.4, 120 pure cotton gauze blank cloth into a high-temperature high-pressure boiling cylinder;
(2) Feeding: at normal temperature, 55kg of a Soft-KA pretreatment agent (diluted with water 1: 1;
(3) Heating and preserving heat: heating the working solution to 95 ℃, preserving the heat for 55min, and discharging the working solution;
(4) Washing with hot water: adding 40 deg.C warm water, heating to 80 deg.C, washing with water for 10min, and discharging liquid;
(5) Secondary cold water washing: adding normal temperature water, washing for 7min each time, and discharging liquid;
(6) Neutralization and washing: adding 7kg of citric acid for neutralization washing for 15min, and discharging the neutralization solution when the pH of the neutralization solution is 6.5;
(7) And (5) taking the gauze out of the vat and drying.
The flexible gauze pretreated by the process has the following main technical indexes:
example comparison:
comparing the flexible pretreatment process of the pure cotton gauze with the conventional pretreatment process of the pure cotton gauze (taking 22 pieces of 29 pieces of 24.4 pieces of 120 pieces of gauze per cylinder as an example and 1.8T):
(1) The ratio of materials used for the flexible pretreatment of the pure cotton gauze is compared with that used for the conventional pretreatment:
(2) The flexible pretreatment process of the pure cotton gauze is compared with the conventional pretreatment process flow:
(3) Comparing the test results of the flexible pretreatment of the pure cotton gauze with the conventional pretreatment:
compared with the conventional process, the invention has the advantages of less material consumption, no overflow washing, low boiling and bleaching temperature, energy and water conservation, high production efficiency, good whiteness of the treated gauze and high breaking strength; the boiling and bleaching reaction can effectively protect cotton fibers, remove cottonseed hulls, pectic substances and other symbiotic impurities, effectively retain natural cotton wax, and ensure that gauze has soft hand feeling; the COD value of the discharged waste liquid is greatly reduced compared with the conventional process, the sewage treatment cost is low, and the low-carbon environmental protection development is met.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, and it will be appreciated by those skilled in the art that various changes and modifications may be made in the present invention, and any modifications, substitutions and the like within the spirit and scope of the present invention should be included in the present invention.
Claims (4)
1. A flexible pretreatment process for pure cotton gauze is characterized by comprising the following steps:
(1) Putting gauze into a vat: putting cotton gauze into a high-temperature high-pressure boiling cylinder;
(2) Feeding: adding boiling and bleaching working solution into the boiling cylinder at normal temperature;
(3) Heating and preserving heat: heating the working solution to 95-98 ℃, preserving the temperature for 45-60 min, and discharging the working solution;
(4) Hot water washing: adding warm water of 40-50 ℃, heating to 80 ℃, washing for 10min, and discharging liquid;
(5) Secondary cold water washing: adding normal temperature water, washing for 7min each time, and discharging liquid;
(6) Neutralization and washing: adding citric acid accounting for 0.2-0.5% of the weight of the gauze for neutralization and washing for 15min, and discharging the neutralization solution when the pH of the neutralization solution is 5.5-6.5;
(7) Taking the gauze out of the vat and drying;
in the step (2), the boiling and bleaching working solution is a mixed solution formed by compounding a Soft-KA pretreatment agent, 98% of sodium hydroxide and 27.5% of hydrogen peroxide.
2. The flexible pretreatment process of pure cotton gauze according to claim 1, characterized in that:
1.8 to 2.2% by volume of Soft-KA pretreatment agent, 1.0 to 2.7% by volume of sodium hydroxide of 98%, 6.5 to 8.5% by volume of hydrogen peroxide of 27.5%.
3. The flexible pretreatment process of pure cotton gauze according to claim 1 or 2, characterized in that:
the Soft-KA pretreatment agent comprises the following raw materials in percentage by mass:
10-15% of fatty acid methyl ester ethoxylate FMEE, 15-20% of secondary alkyl sodium sulfonate, 5-10% of cocamidopropyl betaine, 3-5% of polyacrylic acid, 3-615-8% of block polyether L-615 and the balance of water.
4. The flexible pretreatment process of pure cotton gauze according to claim 3, characterized in that:
the Soft-KA pretreatment agent is prepared by the following method:
(1) Firstly, slowly adding the block polyether L-61 into water, stirring at the speed of 200-300 r/min for 5-10 min;
(2) Adding sodium secondary alkyl sulfonate and cocamidopropyl betaine into the system, stirring at 100-200 r/min for 5-10 min;
(3) Adding fatty acid methyl ester ethoxylate FMEE and polyacrylic acid into the system, stirring at the speed of 50-60 r/min for 10-15 min, and filtering and discharging to obtain the Soft-KA pretreatment agent.
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| CN202211661013.4A CN115821568B (en) | 2022-12-23 | 2022-12-23 | Flexible pretreatment process for pure cotton gauze |
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| CN202211661013.4A CN115821568B (en) | 2022-12-23 | 2022-12-23 | Flexible pretreatment process for pure cotton gauze |
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| CN115821568B CN115821568B (en) | 2024-06-18 |
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| CN106758199A (en) * | 2016-12-26 | 2017-05-31 | 上海市纺织科学研究院 | A kind of pre-treatment processing technology of silk flosssilk wadding |
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2022
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