CN110359275B - An anti-wrinkle finishing method for all-cotton garments - Google Patents
An anti-wrinkle finishing method for all-cotton garments Download PDFInfo
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- CN110359275B CN110359275B CN201910716270.5A CN201910716270A CN110359275B CN 110359275 B CN110359275 B CN 110359275B CN 201910716270 A CN201910716270 A CN 201910716270A CN 110359275 B CN110359275 B CN 110359275B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/196—Percarboxylic acids; Anhydrides, halides or salts thereof
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/203—Unsaturated carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/2035—Aromatic acids
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
- D06M13/256—Sulfonated compounds esters thereof, e.g. sultones
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/58—Material containing hydroxyl groups
- D06P3/60—Natural or regenerated cellulose
- D06P3/62—Natural or regenerated cellulose using direct dyes
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- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/22—Effecting variation of dye affinity on textile material by chemical means that react with the fibre
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/20—Treatment influencing the crease behaviour, the wrinkle resistance, the crease recovery or the ironing ease
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Abstract
本发明公开了一种全棉质品服装的抗皱整理方法，具体工艺过程如下：将棉纤维预处理后加入抗皱整理剂中，得到抗皱纤维，将碳酸钠加入水中，搅拌溶解，然后向其中加入过氧乙酸混合均匀，接着向其中加入抗皱纤维浸泡后烘干，然后用直接染料染色，将染色后的纤维纺织形成纱线，然后将纱线进行编制得到面料。本发明通过将棉纤维进行预处理后，增加了棉纤维表面的作用位点，然后直接先对棉纤维进行抗皱整理，使得棉纤维中的活性基团能够与抗皱整理剂中的功能基团进行交联，提高了棉纤维表面交联聚合物的覆盖面积和交联程度，进而提高了面料的抗皱性能。The invention discloses an anti-wrinkle finishing method for all-cotton garments. The specific process is as follows: adding cotton fiber into an anti-wrinkle finishing agent after pretreatment to obtain anti-wrinkle fibers, adding sodium carbonate to water, stirring and dissolving, and then adding The peracetic acid is mixed evenly, and then anti-wrinkle fibers are added to it, soaked, dried, and then dyed with direct dyes. The dyed fibers are spun to form yarns, and then the yarns are woven to obtain fabrics. The invention increases the action sites on the surface of the cotton fiber after pretreatment of the cotton fiber, and then directly performs the anti-wrinkle finishing on the cotton fiber, so that the active groups in the cotton fiber can interact with the functional groups in the anti-wrinkle finishing agent. Cross-linking increases the coverage area and cross-linking degree of the cross-linked polymer on the surface of the cotton fiber, thereby improving the wrinkle resistance of the fabric.
Description
Technical Field
The invention belongs to the field of garment preparation, and relates to a crease-resistant finishing method for all-cotton garments.
Background
In the process of textile printing and dyeing, severe shrinkage of cotton fabrics and viscose fibers is easy to occur, in addition, the cotton fibers are lack of elasticity, and the crease-resistant performance is poor, in order to overcome the defect, the crease-resistant finishing is carried out on the fabrics, the mechanism of the crease-resistant finishing is that a crease-resistant finishing agent is crosslinked with active groups in the fibers, and a crosslinked polymer is formed on the surfaces of the fibers, so that the crease-resistant performance is realized, but the crosslinked polymer is adhered to the surfaces of the fabrics, so that the color of the fabrics is changed, and the color of the fabrics has certain color difference and the attractiveness is influenced; meanwhile, when the fabric is printed and dyed, the surface of the fabric fiber adsorbs a layer of dye, and the action sites on the surface of the fiber are reduced through the shielding effect of the dye, so that the action sites between the anti-crease finishing agent and the fabric are reduced, the polymer composite content on the surface of the fiber is reduced when the fiber is subjected to anti-crease finishing, and the anti-crease performance of the fabric is reduced.
Disclosure of Invention
The invention aims to provide an anti-crease finishing method of all-cotton clothing, which increases the action sites on the surface of cotton fibers after the cotton fibers are pretreated, then directly carries out anti-crease finishing on the cotton fibers firstly, so that active groups in the cotton fibers can be crosslinked with functional groups in an anti-crease finishing agent, the coverage area and the crosslinking degree of a cross-linked polymer on the surface of the cotton fibers are improved, the anti-crease performance of a fabric is further improved, meanwhile, the fiber surface polymer can be subjected to ring-opening reaction with amino and phenolic hydroxyl in a direct dye after epoxidation, and the epoxy groups on the surface and inside of the fibers, so that the direct dye is compounded on the surface and inside of the fibers through chemical action, the binding capacity between the dye and the fibers is strong, the fibers are dyed uniformly, the color fixation is firm, and simultaneously, because the dye is compounded on the surface and inside of the fibers directly, so that the color of the prepared fabric is kept unchanged.
The purpose of the invention can be realized by the following technical scheme:
a crease-resistant finishing method for all-cotton clothes comprises the following specific process steps:
firstly, adding cotton fibers into a sodium hydroxide solution with the mass concentration of 5%, then heating to 60-65 ℃, soaking and reacting for 3-4h, then taking out the soaked cotton fibers, washing with a hydrochloric acid solution with the mass concentration of 1%, water and an ethanol solution in sequence, and drying to obtain pretreated cotton fibers;
secondly, adding the pretreated cotton fibers obtained in the first step into an anti-crease finishing agent, soaking for 80-90min at 50 ℃, taking out and drying to obtain anti-crease fibers; the pretreatment cotton fiber and the crease-resistant finishing agent are mixed according to the mass ratio of 1: 20-25 of the weight percentage is added for dipping; because the three branched chains of the polyunsaturated acid in the anti-wrinkle finishing agent all contain carboxyl, the carboxyl can react with hydroxyl on pretreated cotton fibers to form ether bond crosslinking, and the anti-wrinkle finishing agent is added with sodium dodecyl sulfate, so that the permeability of the polyunsaturated acid can be improved, the carboxyl in the polyunsaturated acid can permeate into the fibers and react with the hydroxyl in the fibers, and further the fibers are internally crosslinked to form a three-dimensional network structure, wherein the three-dimensional network structure prevents the wrinkle deformation of the fibers, and after the external force disappears, the deformation recovery is accelerated, so that the wrinkle resistance elasticity is improved;
the preparation process of the anti-wrinkle finishing agent is as follows:
step 1: adding trimethylolpropane triglycidyl ether into ethanol, stirring and mixing uniformly, heating to 90-95 ℃, then adding salicylaldehyde into the ethanol, stirring and mixing for 5-6 hours, and then carrying out reduced pressure distillation to obtain branched polyaldehyde; wherein the weight ratio of the trimethylolpropane triglycidyl ether to the salicylaldehyde is 1: 3.06-3.08, and simultaneously adding 3kg of ethanol solution into each mole of trimethylolpropane triglycidyl ether; because the trimethylolpropane triglycidyl ether contains three branched chains, one end of each branched chain contains an epoxy group, and the epoxy groups can perform ring-opening reaction with phenolic hydroxyl in salicylaldehyde at high temperature, so that aldehyde groups are introduced into one end of the branched chain of the trimethylolpropane triglycidyl ether;
step 2: adding the branched polyaldehyde prepared in the step 1 into ethyl ether, simultaneously adding crotonic anhydride and sodium crotonate into the ethyl ether, heating to 180-185 ℃, carrying out reflux reaction for 18-20h, then evaporating to remove the ethyl ether, and carrying out reduced pressure distillation on the product to remove the generated crotonic acid to obtain polyunsaturated acid; wherein the ratio of the branched polyaldehyde to the crotonic anhydride per mole of the branched polyaldehyde is 1: 1, and simultaneously adding 1.1mol of sodium crotonate into each mol of branched polyaldehyde; because the aldehyde group in the branched multi-element aldehyde is aromatic aldehyde, the aromatic aldehyde can react with anhydride to generate a Perkin reaction to generate unsaturated carboxyl, and because the crotonic anhydride contains an unsaturated bond, each branched chain of the generated product contains two unsaturated olefin groups;
and step 3: adding the polyunsaturated acid and the sodium dodecyl sulfate prepared in the step 2 into water, stirring for dissolving, then adding the dimethyl silicone oil into the water, and stirring and mixing uniformly to obtain the anti-wrinkle finishing agent; wherein 0.11-0.12g of sodium dodecyl sulfate, 0.24-0.26g of dimethyl silicone oil and 82-85mL of water are added into each gram of the polyunsaturated acid;
thirdly, adding sodium carbonate into water, stirring for dissolving, then adding peroxyacetic acid into the water, uniformly mixing, then adding the anti-wrinkle fiber prepared in the second step into the mixture, soaking the mixture for 3 to 4 hours at normal temperature, then filtering the mixture, washing the filtered fiber for 4 to 5 times by using water, and drying the washed fiber; wherein 12-13mL of water, 0.71-0.72g of sodium carbonate and 0.52-0.54g of peroxyacetic acid are added into each gram of anti-wrinkle fiber, each branched chain of cross-linked polyunsaturated acid in the anti-wrinkle fiber contains two unsaturated olefin groups, the olefin groups can form epoxy groups under the oxidation action of the peroxyacetic acid, and the polyunsaturated acid is cross-linked with hydroxyl groups in the fiber to form a net structure on the surface and inside of the fiber, wherein the net structure contains a large amount of polyunsaturated acid, so that after the peroxyacetic acid is oxidized, the surface and inside of the fiber both contain epoxy groups;
step four, weighing a certain amount of direct dye, adding the direct dye into water, stirring and dissolving, then adding the dried fiber in the step three, heating to 50-55 ℃, soaking for 5-6h, then fishing out the fiber and drying; the direct dye is one or more of direct scarlet 4B, direct blue 2B, direct lake blue 6B, direct violet R, direct violet D-N, direct black, direct fast pink and direct diazo dye; the surface and the inside of the fiber both contain epoxy groups, so that amino and phenolic hydroxyl in the direct dye can perform ring-opening reaction with the epoxy groups on the surface and the inside of the fiber, the direct dye is compounded on the surface and the inside of the fiber through chemical action, the binding capacity between the dye and the fiber is strong, the fiber is dyed uniformly, the color fixation is firm, and the color of the prepared fabric is kept unchanged because the dye is directly compounded on the surface and the inside of the fiber;
and fifthly, spinning the fibers dried in the fourth step to form yarns, and then weaving the yarns to obtain the fabric.
The invention has the beneficial effects that:
1. the invention increases the action sites on the surface of the cotton fiber after the cotton fiber is pretreated, then directly carries out crease-resistant finishing on the cotton fiber firstly, because each branched chain of cross-linked polyunsaturated acid in the crease-resistant fiber contains two unsaturated olefin groups which can form an epoxy group under the oxidation action of peracetic acid, and because the polyunsaturated acid is cross-linked with hydroxyl in the fiber, a net structure is formed on the surface and the inside of the fiber, wherein the three-dimensional net structure prevents the crease deformation of the fiber, and after the external force disappears, the deformation recovery is accelerated, so that the crease-resistant elasticity is improved, thereby solving the problems that the prior fabric is directly printed and dyed firstly, the surface of the fabric fiber adsorbs a layer of dye, the action sites on the surface of the fiber are reduced through the shielding action of the dye, and further the action sites between the crease-resistant finishing agent and the fabric are reduced, when the fiber is subjected to crease-resistant finishing, the composite content of the polymer on the surface of the fiber is reduced, and the crease resistance of the fabric is further reduced.
2. The invention finishes the fiber and then dyes, so that the formed polymer in the finishing process can not influence the color of the fabric, meanwhile, a polymer branched chain formed in the fiber finishing process contains a large amount of unsaturated groups, the unsaturated groups are epoxidized to form epoxy groups on the surface and the inside of the fiber, and further, amino groups and phenolic hydroxyl groups in the direct dye can perform ring-opening reaction with epoxy groups on the surface and the inside of the fiber, so that the direct dye is compounded on the surface and the inside of the fiber through chemical action, the binding capacity between the dye and the fiber is strong, the fiber is dyed uniformly and is fixed firmly, and simultaneously, the color of the prepared fabric is kept unchanged because the dye is compounded on the surface and the inside of the fiber directly, thereby achieving the problems of not influencing the color of the pigment and not causing the color fading of the dye, the method solves the problems that in the prior art, the fabric is usually subjected to crease-resistant finishing, the mechanism of crease-resistant finishing is to form a crosslinked polymer on the surface of the fiber through crosslinking of an crease-resistant finishing agent and active groups in the fiber, so that crease-resistant performance is realized, but the crosslinked polymer is adhered to the surface of the fabric, so that the color of the fabric is changed, the color of the fabric has certain color difference, and the attractiveness is influenced.
Detailed Description
Example 1:
the preparation process of the crease-resistant finishing agent is as follows:
step 1: adding 30.2g of trimethylolpropane triglycidyl ether into 300g of ethanol, stirring and mixing uniformly, heating to 90-95 ℃, then adding 37.3g of salicylaldehyde, stirring and mixing for 5-6 hours, and then carrying out reduced pressure distillation to obtain branched polyaldehyde;
step 2: adding 66.8g of the branched polyaldehyde prepared in the step 1 into 700mL of diethyl ether, simultaneously adding 15.4g of crotonic anhydride and 20.5g of sodium crotonate, heating to 180-185 ℃, carrying out reflux reaction for 18-20h, then evaporating to remove the diethyl ether, and carrying out reduced pressure distillation on the product to remove the generated crotonic acid to obtain polyunsaturated acid;
and step 3: and (3) adding 10g of the polyunsaturated acid prepared in the step (2) and 1.1g of sodium dodecyl sulfate into 820mL of water, stirring for dissolving, then adding 2.4g of dimethyl silicone oil into the water, and stirring and mixing uniformly to obtain the anti-wrinkle finishing agent.
Example 2:
adding 10g of citric acid and 1.1g of sodium dodecyl sulfate into 820mL of water, stirring and dissolving, then adding 2.4g of dimethyl silicone oil, and stirring and mixing uniformly to obtain the anti-wrinkle finishing agent.
Example 3:
a crease-resistant finishing method for all-cotton clothes comprises the following specific process steps:
firstly, adding 1kg of cotton fiber into 15L of 5% sodium hydroxide solution, heating to 60-65 ℃, soaking and reacting for 3-4h, then taking out the soaked cotton fiber, washing with 1% hydrochloric acid solution, water and ethanol solution in sequence, and drying to obtain pretreated cotton fiber;
secondly, adding 1kg of the pretreated cotton fibers obtained in the first step into 20kg of the crease-resistant finishing agent prepared in the embodiment 1, soaking at 50 ℃ for 80-90min, taking out and drying to obtain crease-resistant fibers;
thirdly, adding 0.71kg of sodium carbonate into 12L of water, stirring for dissolving, then adding 0.52kg of peroxyacetic acid, uniformly mixing, then adding 1kg of the anti-wrinkle fiber prepared in the second step, soaking for 3-4h at normal temperature, then filtering, washing the fiber obtained after filtering for 4-5 times with water, and drying;
fourthly, weighing 20g of direct fast pink, adding the direct fast pink into 1kg of water, stirring and dissolving, then adding 500g of the dried fiber obtained in the third step, heating to 50-55 ℃, soaking for 5-6h, and then fishing out the fiber and drying;
and fifthly, spinning the fibers dried in the fourth step to form yarns, and then weaving the yarns to obtain the fabric.
Example 4:
a crease-resistant finishing method for all-cotton clothes comprises the following specific process steps:
firstly, adding 1kg of cotton fiber into 15L of 5% sodium hydroxide solution, heating to 60-65 ℃, soaking and reacting for 3-4h, then taking out the soaked cotton fiber, washing with 1% hydrochloric acid solution, water and ethanol solution in sequence, and drying to obtain pretreated cotton fiber;
secondly, adding 1kg of the pretreated cotton fibers obtained in the first step into 20kg of the crease-resistant finishing agent prepared in the embodiment 2, soaking at 50 ℃ for 80-90min, taking out and drying to obtain crease-resistant fibers;
thirdly, weighing 20g of direct fast pink, adding the direct fast pink into 1kg of water, stirring and dissolving, then adding 500g of anti-wrinkle fiber into the direct fast pink, heating to 50-55 ℃, soaking for 5-6h, then fishing out the fiber and drying;
and fourthly, spinning the fibers dried in the third step to form yarns, and then weaving the yarns to obtain the fabric.
Example 5:
a crease-resistant finishing method for all-cotton clothes comprises the following specific process steps:
firstly, adding 1kg of cotton fiber into 15L of 5% sodium hydroxide solution, heating to 60-65 ℃, soaking and reacting for 3-4h, then taking out the soaked cotton fiber, washing with 1% hydrochloric acid solution, water and ethanol solution in sequence, and drying to obtain pretreated cotton fiber;
secondly, weighing 20g of direct fast pink, adding the direct fast pink into 1kg of water, stirring and dissolving, then adding 500g of pretreated cotton fibers into the direct fast pink, heating to 50-55 ℃, soaking for 5-6h, and then fishing out the fibers and drying;
step three, adding 1kg of the fibers dried in the step two into 20kg of the crease-resistant finishing agent prepared in the embodiment 1, soaking at 50 ℃ for 80-90min, taking out and drying to obtain crease-resistant fibers;
and fourthly, spinning the anti-wrinkle fibers in the third step to form yarns, and then weaving the yarns to obtain the fabric.
Example 6:
a crease-resistant finishing method for all-cotton clothes comprises the following specific process steps:
firstly, adding 1kg of cotton fiber into 15L of 5% sodium hydroxide solution, heating to 60-65 ℃, soaking and reacting for 3-4h, then taking out the soaked cotton fiber, washing with 1% hydrochloric acid solution, water and ethanol solution in sequence, and drying to obtain pretreated cotton fiber;
secondly, adding 1kg of the pretreated cotton fibers obtained in the first step into 20kg of the crease-resistant finishing agent prepared in the embodiment 1, soaking at 50 ℃ for 80-90min, taking out and drying to obtain crease-resistant fibers;
thirdly, weighing 20g of direct fast pink, adding the direct fast pink into 1kg of water, stirring and dissolving, then adding 500g of anti-wrinkle fiber into the direct fast pink, heating to 50-55 ℃, soaking for 5-6h, then fishing out the fiber and drying;
and fourthly, spinning the fibers dried in the third step to form yarns, and then weaving the yarns to obtain the fabric.
Example 7:
the fabrics prepared in examples 3-6 were observed for color change after being washed in a washing machine 8 times, 15 times, and 30 times, respectively, and the results are shown in table 1;
table 1 fabric color and wrinkle recovery angle measurements made in examples 3-6
As can be seen from table 1, the fabric prepared in example 3 is bright in color, is substantially the same as the color of the dye, and the color of the dye does not change greatly after being washed for many times, because each branched chain of the crosslinked polyunsaturated acid in the wrinkle-resistant fiber contains two unsaturated olefin groups, the olefin groups can form epoxy groups under the oxidation action of peroxyacetic acid, because the polyunsaturated acid is crosslinked with hydroxyl groups in the fiber, a network structure is formed on the surface and inside of the fiber, the network structure contains a large amount of polyunsaturated acid, and further after being oxidized by peroxyacetic acid, the surface and inside of the fiber both contain epoxy groups, so that amino groups and phenolic hydroxyl groups in the direct dye can both perform ring-opening reaction with the epoxy groups on the surface and inside of the fiber, and further the direct dye is compounded on the surface and inside of the fiber through chemical action, and the binding capacity between the dye and the fiber is strong, the fiber is dyed uniformly and fixed firmly, and meanwhile, the color of the prepared fabric is kept unchanged as the dye is directly compounded on the surface and the inside of the fiber; in example 4, the organic polyacid in the anti-crease finishing agent is citric acid, and after the citric acid is crosslinked with the fiber, the action site on the surface of the fiber is reduced, so that the added dye is only compounded on the surface of the fiber through physical adsorption and intermolecular force, the action force is weak, and the fiber is easy to fade after being washed for multiple times.
Example 8:
after the fabrics prepared in examples 3-6 were washed 8 times, 15 times, and 30 times, respectively, the elastic wrinkle recovery angle of the fabrics before and after washing was measured by a TNG01 type elasticizer according to AATCC66-1998, with the results shown in table 2:
TABLE 2 elastic crease recovery Angle (DEG) of Fabric after washing different number of times
| Example 3 | Example 4 | Example 5 | Example 6 | |
| 0 time | 186 | 185 | 165 | 186 |
| 8 times (by volume) | 185 | 184 | 151 | 185 |
| 15 times of | 185 | 184 | 147 | 184 |
| 30 times (twice) | 184 | 184 | 141 | 184 |
As can be seen from table 2, in examples 3, 4 and 6, the polybasic acid is directly used as the crease-resistant finishing agent for treatment, so that the polybasic acid is crosslinked with the hydroxyl groups in the fibers to form a three-dimensional network structure on the surface and inside of the fibers, wherein the three-dimensional network structure prevents the crease deformation of the fibers, and after the external force disappears, the deformation recovery is accelerated, so that the crease-resistant elasticity is improved; in example 5, since the fiber is dyed and then finished, the content of the active groups on the surface of the fiber is reduced after the dye is adsorbed on the surface of the fiber, and the acting force between the dye and the finishing agent is low, so that the content of the active finishing agent crosslinked on the surface of the fiber is reduced, the acting force between the active finishing agent and the dye and the fiber is low, the content of the finishing agent is reduced under the action of multiple times of cleaning, and the crease resistance of the fiber is reduced.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. The crease-resistant finishing method of the all-cotton clothing is characterized by comprising the following specific process steps of:
firstly, adding cotton fibers into a sodium hydroxide solution with the mass concentration of 5%, then heating to 60-65 ℃, soaking and reacting for 3-4h, then taking out the soaked cotton fibers, washing with a hydrochloric acid solution with the mass concentration of 1%, water and an ethanol solution in sequence, and drying to obtain pretreated cotton fibers;
secondly, adding the pretreated cotton fibers obtained in the first step into an anti-crease finishing agent, soaking for 80-90min at 50 ℃, taking out and drying to obtain anti-crease fibers;
thirdly, adding sodium carbonate into water, stirring for dissolving, then adding peroxyacetic acid into the water, uniformly mixing, then adding the anti-wrinkle fiber prepared in the second step into the mixture, soaking the mixture for 3 to 4 hours at normal temperature, then filtering the mixture, washing the filtered fiber for 4 to 5 times by using water, and drying the washed fiber;
step four, weighing a certain amount of direct dye, adding the direct dye into water, stirring and dissolving, then adding the dried fiber in the step three, heating to 50-55 ℃, soaking for 5-6h, then fishing out the fiber and drying;
fifthly, spinning the fibers dried in the fourth step to form yarns, and then weaving the yarns to obtain the fabric;
the preparation process of the crease-resistant finishing agent in the second step is as follows:
step 1: adding trimethylolpropane triglycidyl ether into ethanol, stirring and mixing uniformly, heating to 90-95 ℃, then adding salicylaldehyde into the ethanol, stirring and mixing for 5-6 hours, and then carrying out reduced pressure distillation to obtain branched polyaldehyde;
step 2: adding the branched polyaldehyde prepared in the step 1 into ethyl ether, simultaneously adding crotonic anhydride and sodium crotonate into the ethyl ether, heating to 180-185 ℃, carrying out reflux reaction for 18-20h, then evaporating to remove the ethyl ether, and carrying out reduced pressure distillation on the product to remove the generated crotonic acid to obtain polyunsaturated acid;
and step 3: adding the polyunsaturated acid and the sodium dodecyl sulfate prepared in the step 2 into water, stirring for dissolving, then adding the dimethyl silicone oil into the water, and stirring and mixing uniformly to obtain the anti-wrinkle finishing agent;
in the fourth step, the direct dye is one or more of direct scarlet 4B, direct blue 2B, direct lake blue 6B, direct purple R, direct purple D-N, direct black, direct fast pink and direct diazo dye;
in the step 1, the weight ratio of trimethylolpropane triglycidyl ether to salicylaldehyde is 1: 3.06-3.08;
in the step 2, the ratio of each mole of branched polyaldehyde to each mole of crotonic anhydride in terms of the amount of the substances is 1: 1 while adding 1.1mol of sodium crotonate per mol of branched polyaldehyde.
2. The method for crease-resistant finishing of all-cotton clothes according to claim 1, wherein in the third step, 12-13mL of water, 0.71-0.72g of sodium carbonate and 0.52-0.54g of peroxyacetic acid are added to each gram of crease-resistant fiber.
3. The crease-resistant finishing method for all-cotton clothes according to claim 1, wherein 0.11-0.12g of sodium dodecyl sulfate, 0.24-0.26g of simethicone and 82-85mL of water are added into each gram of polyunsaturated acid in step 3.
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Address after: 236500 north of Shengli East Road, Dongcheng Industrial Park, Jieshou City, Fuyang City, Anhui Province Patentee after: Anhui Hengyi Intelligent Technology Co.,Ltd. Address before: 236500 north of Shengli East Road, Dongcheng Industrial Park, Jieshou City, Fuyang City, Anhui Province Patentee before: ANHUI HENGYI TEXTILE TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A method for anti-wrinkle finishing of cotton garments Granted publication date: 20211022 Pledgee: Anhui Jieshou rural commercial bank Limited by Share Ltd. Pledgor: Anhui Hengyi Intelligent Technology Co.,Ltd. Registration number: Y2025980037594 |