Preparation process of bio-based PA510-Tencel blended fabric

Abstract

The invention discloses a preparation process of a bio-based PA510 Tencel blended fabric, comprising the following specific steps: raw material weaving, soaking, pre-setting, acid dye coloring, reactive dye coloring, color fixation, and high temperature setting. The fabric woven by the invention has good softness, elasticity and wrinkle resistance. After the bio-based PA510 is blended with Tencel, the fiber blending ratio is optimized to make the two fibers cooperate with each other to achieve a significant improvement in overall hygroscopicity. The acid dye is firstly used to achieve adsorption fixation by ionic bonding in an acidic environment to improve coloring, and then washed, neutralized and removed impurities after dyeing; then reactive dyes are used to further increase the fixation amount and improve the dyeing depth by covalent bonding under alkaline conditions, which can make up for the problem of uneven dyeing of acid dyes, effectively improve the dyeing effect and improve the performance of fabrics.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles, and particularly relates to a preparation process of a bio-based PA510-Tencel blended fabric. Background Art

[0002] As society pays more and more attention to environmental issues, consumers' demand for sustainable products is also increasing, and bio-based materials are increasingly used in the textile field. As a new environmentally friendly material, bio-based PA510 has received more and more attention in the market. With the improvement of people's environmental awareness and the continuous advancement of technology, the application field of bio-based PA510 will continue to expand, and the market prospects are broad. Bio-based PA510 fabrics have good mechanical properties, wear resistance and chemical stability, and their raw materials are renewable and environmentally friendly. However, bio-based PA510 fabrics have poor hygroscopicity, are easy to deform, and are prone to pilling after long-term use. There are also problems such as difficulty in coloring and uneven dyeing, because of their high crystallinity, tight molecular chains and strong hydrophobicity, which affect the adhesion and affinity of dyes. In view of this, the preparation method of bio-based PA510 fabrics still needs to be further optimized and innovated to improve the quality of fabrics. Summary of the invention

[0003] In order to solve the shortcomings of the prior art, the purpose of the present invention is to provide a preparation process of a bio-based PA510-Tencel blended fabric. The fabric has good softness, elasticity, wrinkle resistance and hygroscopicity, can make up for the problem of uneven dyeing of acid dyes, effectively improve the dyeing effect and enhance the performance of the fabric.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A preparation process of a bio-based PA510 Tencel blended fabric comprises the following specific steps:

[0006] S1. Raw material weaving: prepare warp and weft yarns and weave them using air jet loom;

[0007] S2, soaking: putting the woven fabric into a soaking liquid for soaking;

[0008] S3, pre-setting: pre-setting the soaked fabric;

[0009] S4, acid dye coloring: the pre-shaped fabric is colored with acid dye, the acid dye includes the following components in weight percentage: 70% to 85% of dye, 5% to 10% of accelerator, and the rest is auxiliary agent A, the accelerator is N-(naphthalene-2-yl)-2-sulfonic acid ethyl ester carbamate;

[0010] S5. Coloring with reactive dyes: After washing the acid-dyed fabric, the fabric is colored with reactive dyes;

[0011] S6, color fixing: After dyeing, the fabric is washed with hot water and soaked in a sodium carbonate color fixing solution for color fixing;

[0012] S7, high temperature shaping: the fabric after color fixation is subjected to high temperature shaping to obtain a finished blended fabric.

[0013] Preferably, in the aforementioned step S1, a blended yarn of 35% bio-based nylon / 65% Tencel 50S+40D is used as the warp yarn, and a blended yarn of 35% bio-based nylon / 65% Tencel 50S is used as the weft yarn.

[0014] Preferably, in the aforementioned step S2, the soaking liquid comprises the following components in parts by weight: 35-45 g / L of liquid caustic soda, 6 g / L of hydrogen peroxide, 1-1.5 g / L of oxidative desizing agent TF-127K, 0.7-1.1 g / L of refining agent TF-188A, and 0.4-0.8 g / L of penetrant TF-107.

[0015] Preferably, in the aforementioned step S3, the speed of the setting machine is 40-60 m / min, the temperature is 170-180° C., and the setting time is 40-50 seconds.

[0016] Preferably, in the aforementioned step S4, the dye comprises the following components in percentage by weight: acid gray B-NS 0.8% to 1.2%, acid red B-NS 6% to 7%, and the balance is water; the auxiliary agent A comprises the following components: ammonium sulfate 0.6 to 1 g / L, glacial acetic acid 0.3 to 0.5 g / L, acid dyeing treasure M-2200T 0.5 to 0.7 g / L; the temperature for coloring the acid dye is 90 to 100°C, the pH is 4-6, and the heat preservation dyeing is 40 to 60 minutes.

[0017] Preferably, in the aforementioned step S4, the preparation of the dyeing accelerator comprises the following steps:

[0018] (1) 2-naphthylamine and ethyl formate are added to a reaction vessel, a solvent is added and stirred evenly, and N-(2-naphthyl)formamide is obtained by reaction. The reaction equation is as follows:

[0019] 2-naphthylamine + ethyl formate → N-(2-naphthyl)formamide + ethanol;

[0020] (2) Mixing N-(2-naphthyl)formamide with sodium hydroxide solution, and reacting under heating reflux conditions to hydrolyze the amide bond to generate N-(naphthyl-2-yl)amine. The reaction equation is as follows:

[0021] N-(naphthalene-2-yl)formamide + NaOH → N-(naphthalene-2-yl)amine + HCCONa;

[0022] (3) N-(naphthalene-2-yl)amine is dissolved in an anhydrous organic solvent, and a solution of 2-ethyl sulfonate isocyanate is slowly added dropwise at low temperature to react to generate N-(naphthalene-2-yl)-2-ethyl sulfonate carbamate. The reaction equation is as follows:

[0023] N-(Naphthyl-2-yl)amine+2-sulfonic acid ethyl isocyanate→N-(Naphthyl-2-yl)-2-sulfonic acid ethyl carbamate.

[0024] Preferably, in the aforementioned step (1), the molar ratio of 2-naphthylamine to ethyl formate is 1.2-1.5:2, and the solvent is ethanol; in the step (2), the molar ratio of N-(2-naphthyl)formamide to sodium hydroxide is 2.5-2.8:1.5-1.7; in the step (3), the molar ratio of N-(naphth-2-yl)amine to 2-ethyl sulfonate isocyanate is 1-2.2:2-2.5, and the anhydrous organic solvent is anhydrous tetrahydrofuran.

[0025] Preferably, in the aforementioned step S5, auxiliary agent B is added to the reactive dye, and the mass ratio of the reactive dye to the auxiliary agent B is 13-15:1-2; the reactive dye comprises the following components in weight percentage: reactive red FN-3GL 0.8%-1.2%, reactive yellow 3RN 2%-4% and reactive blue FNG 2%-4%, and the balance is water; auxiliary agent B comprises the following components: 28-32 g / L of sodium sulfate and 18-22 g / L of soda ash, the temperature is set at 100-105°C, and the dyeing is performed for 40-60 min.

[0026] Preferably, in the aforementioned step S6, the specific steps of fixing the color are: washing the fabric in hot water at 40 to 60°C for 10 to 20 minutes, then putting the fabric in hot water at 70 to 80°C, adding 2g / L sodium carbonate fixing solution, soaking for 20 to 30 minutes for fixing the color, then washing with hot water at 40 to 60°C for 10-20 minutes, and finally washing with supercooled water to complete the fixing.

[0027] The present invention is beneficial in that:

[0028] (1) The fabric woven by the present invention has good softness, elasticity and anti-wrinkle effect. After the bio-based PA510 is blended with Tencel, the fiber blending ratio is optimized to make the two fibers cooperate with each other. Tencel itself has high hygroscopicity. After being blended with the bio-based PA510, it can absorb and discharge excess water vapor on the human body surface, thereby achieving a significant improvement in overall hygroscopicity and forming a relatively dry environment;

[0029] (2) The present invention firstly uses acid dyes to achieve initial adsorption and fixation by ionic bonding in an acidic environment to improve coloring, and then washes and neutralizes to remove impurities after dyeing; then uses reactive dyes to further increase the fixation amount and improve the dyeing depth by covalent bonding under alkaline conditions, which can make up for the problem of uneven dyeing of acid dyes, effectively improve the dyeing effect and enhance the performance of fabrics;

[0030] (3) The present invention adds a dyeing accelerator N-(naphthalene-2-yl)-2-sulfonic acid ethyl carbamate to the acid dye. The dyeing accelerator contains a carbamate group and a naphthalene ring. The carbamate group can improve the chromaticity of the acid dye, and the naphthalene ring with a macrocyclic structure can further improve the dyeing effect, so that the dyeing effect of the fabric is further improved. DETAILED DESCRIPTION

[0031] The present invention is described in detail below with reference to specific embodiments.

[0032] Example 1

[0033] A preparation process of a bio-based PA510 Tencel blended fabric comprises the following specific steps:

[0034] S1. Raw material weaving: using 35% bio-based nylon / 65% Tencel 50S+40D blended yarn as warp yarn, and 35% bio-based nylon / 65% Tencel 50S blended yarn as weft yarn, and using air jet loom for weaving;

[0035] S2, soaking: soaking the woven fabric in a soaking solution, wherein the soaking solution comprises the following components by weight: 35 g / L of liquid alkali, 6 g / L of hydrogen peroxide, 1 g / L of oxidative desizing agent TF-127K, 0.7 g / L of refining agent TF-188A, and 0.4 g / L of penetrant TF-107;

[0036] S3, pre-setting: the soaked fabric is pre-set, the speed of the setting machine is 40m / min, the temperature is 170℃, and the setting time is 40S;

[0037] S4, acid dye coloring: the pre-shaped fabric is colored with acid dye, the acid dye includes the following components in weight percentage: 70% dye, 5% accelerator, and the rest is auxiliary agent A, the accelerator is N-(naphthalene-2-yl)-2-sulfonic acid ethyl ester carbamate;

[0038] The dye comprises the following components by weight percentage: acid gray B-NS 0.8%, acid red B-NS 6%, and the balance is water; the auxiliary agent A comprises the following components: ammonium sulfate 0.6g / L, glacial acetic acid 0.3g / L, acid dyeing treasure M-2200T 0.5g / L; the temperature of the acid dye is 90°C, the pH is 4, and the temperature is kept for dyeing for 40 minutes;

[0039] The preparation of the dyeing accelerator comprises the following steps:

[0040] (1) Add 2-naphthylamine and 50 mL of ethanol to a round-bottom flask, turn on magnetic stirring to dissolve it, slowly add ethyl formate, the molar ratio of 2-naphthylamine to ethyl formate is 1.2:2, and connect a reflux condenser after the addition is complete. Place the round-bottom flask in a constant temperature water bath at 80-90°C and continue stirring to react for 3-4 hours. After the reaction is completed, cool the reaction solution to room temperature, and filter out solids that precipitate. Wash the filter cake with a small amount of cold ethanol, then transfer the filter cake to a dryer and dry it with anhydrous magnesium sulfate to obtain the N-(2-naphthyl)formamide product. The reaction equation is as follows:

[0041] 2-naphthylamine + ethyl formate → N-(2-naphthyl)formamide + ethanol;

[0042] (2) Add N-(naphthalene-2-yl)formamide and 10% sodium hydroxide solution in a molar ratio of 2.5:1.5 to a round-bottom flask, and place a magnetic stirrer. Install the reflux condenser, turn on the magnetic stirrer, and place the round-bottom flask in an oil bath. Slowly heat to 100-110°C and react for 4-6 hours, during which stirring and temperature stability are maintained. After the reaction is completed, cool the reaction solution to room temperature and transfer it to a separatory funnel. Adjust the pH value to 2-3 with dilute hydrochloric acid, collect the precipitate with a Buchner funnel, and wash it several times with a small amount of cold water. Transfer the precipitate to a separatory funnel, add 50 mL of ether, and then slowly drop 10% sodium hydroxide solution to adjust the pH value to 10-11, so that N-(naphthalene-2-yl)amine is dissolved in the ether layer. After shaking the separatory funnel, let it stand for stratification, dry, and purify to obtain N-(naphthalene-2-yl)amine. The reaction equation is as follows:

[0043] N-(naphthalene-2-yl)formamide + NaOH → N-(naphthalene-2-yl)amine + HCCONa;

[0044] (3) Add an appropriate amount of N-(naphthalene-2-yl)amine to a dry three-necked flask, place it in a low-temperature cooling bath, cool it to 0-5°C, and slowly add 2-ethyl sulfonate isocyanate from a constant pressure dropping funnel while stirring. The molar ratio of N-(naphthalene-2-yl)amine to 2-ethyl sulfonate isocyanate is 1:2. The temperature is controlled not to exceed 5°C during the addition process, and the addition time is 30 minutes. After the addition is completed, the reaction temperature is maintained at 0-5°C, and the reaction is continued to stir for 2-3 hours. It can be observed that the reaction solution gradually becomes turbid and solid products are generated. After the reaction is completed, the reaction solution is slowly heated to room temperature, then filtered, the filter cake is collected, washed to remove unreacted raw materials and impurities, and dried to obtain N-(naphthalene-2-yl)-2-ethyl sulfonate carbamate. The reaction equation is as follows:

[0045] N-(Naphthyl-2-yl)amine+2-sulfonic acid ethyl isocyanate→N-(Naphthyl-2-yl)-2-sulfonic acid ethyl carbamate.

[0046] S5. Coloring with reactive dyes: After washing the acid-dyed fabric, the fabric is colored with reactive dyes, and auxiliary agent B is also added to the reactive dyes, and the mass ratio of the reactive dyes to the auxiliary agent B is 13:1; the reactive dyes include the following components in percentage by weight: reactive red FN-3GL 0.8%, reactive yellow 3RN 2% and reactive blue FNG 2%, and the balance is water; auxiliary agent B includes the following components: sodium sulfate 28g / L and soda ash 18g / L, the temperature is set to 100°C, and the dyeing is performed for 40 minutes;

[0047] S6, color fixation: put the fabric into 40℃ hot water for 10 minutes, then put the fabric into 70℃ hot water, add 2g / L sodium carbonate color fixation solution, soak for 20 minutes for color fixation, then wash with 40℃ hot water for 10 minutes, and finally wash with supercooled water to complete the color fixation;

[0048] S7, high temperature setting: the fabric after color fixation is subjected to high temperature setting, the speed of the setting machine is 50m / min, the temperature of the setting machine is set to 170°C, the high temperature setting time lasts for 45S, and the finished blended fabric is obtained.

[0049] Comparative Example 1

[0050] The specific difference between this comparative example and Example 1 is that no dyeing accelerator is added to the acid dye, and the acid dye comprises 70% dye and 30% auxiliary agent A.

[0051] Comparative Example 2

[0052] The specific difference between this comparative example and Example 1 is that no acid dye is added.

[0053] Comparative Example 3

[0054] The specific difference between this comparative example and Example 1 is that no reactive dye is added.

[0055] Performance Test:

[0056] According to GB / T 8427-2008, GB / T 3921-2008, GB / T 3920-2008, GB / T 3922-2013 and GB / T5713-2013, the color fastness to light, color fastness to soaping, color fastness to rubbing, color fastness to perspiration and color fastness to water of the fabrics obtained in Example 1 and Comparative Examples 1 to 3 were respectively measured, and the measurement results are shown in Table 1.

[0057] Table 1 Fabric dyeing degree

[0058]

[0059] It can be seen from Table 1 that after adding the dyeing accelerator, the dyeing effect of the fabric can be effectively improved, and its color fastness to light, color fastness to soaping, color fastness to rubbing, color fastness to perspiration and color fastness to water are all higher than those of Comparative Examples 1 to 3.

[0060] In terms of the fusion and innovation of material properties, the plain fabric woven by blending bio-based PA510 and Tencel shows multiple advantages. First, it realizes the combination of high strength and softness, and has both the toughness, durability and non-deformation brought by bio-based PA510 and the softness, comfort and skin-friendlyness of Tencel. Second, it achieves the coordination of hygroscopicity and quick-drying. After blending, it achieves a good balance between hygroscopicity and quick-drying, which can keep the wearer comfortable in different environments. Third, it improves dimensional stability. Thanks to the good dimensional stability and washing dimensional stability of the two, the fabric is not easy to shrink and deform after washing, which can extend the service life of the fabric products. In terms of environmental protection performance innovation, it performs outstandingly. On the one hand, it is due to the application of bio-based materials. Bio-based PA510, as a renewable and biodegradable environmentally friendly nylon, is blended with the equally environmentally friendly regenerated cellulose fiber Tencel, making the production and use of fabrics more in line with the concept of environmental protection, reducing environmental impact and conforming to the trend of sustainable development. On the other hand, the production process of the two is greener than that of traditional chemical fibers, generating less pollutants and consuming less energy. The whole process from raw material acquisition to finished product production highlights green and environmental protection characteristics, which is conducive to promoting the sustainable development of the textile industry.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A preparation process of bio-based PA510 Tencel blended fabric, characterized in that: The specific steps include: S1. Raw material weaving: prepare warp and weft yarns and weave them using air jet loom; S2, soaking: putting the woven fabric into a soaking liquid for soaking; S3, pre-setting: pre-setting the soaked fabric; S4, acid dye coloring: the pre-shaped fabric is colored with acid dye, the acid dye includes the following components in weight percentage: 70% to 85% of dye, 5% to 10% of accelerator, and the rest is auxiliary agent A, the accelerator is N-(naphthalene-2-yl)-2-sulfonic acid ethyl ester carbamate; S5. Coloring with reactive dyes: After washing the acid-dyed fabric, the fabric is colored with reactive dyes; S6, color fixing: After dyeing, the fabric is washed with hot water and soaked in a sodium carbonate color fixing solution to fix the color; S7, high temperature shaping: the fabric after color fixation is subjected to high temperature shaping to obtain a finished blended fabric.

2. The preparation process of a bio-based PA510-Tencel blended fabric according to claim 1, characterized in that: In the step S1, a blended yarn of 35% bio-based nylon / 65% Tencel 50S+40D is used as the warp yarn, and a blended yarn of 35% bio-based nylon / 65% Tencel 50S is used as the weft yarn.

3. The preparation process of a bio-based PA510-Tencel blended fabric according to claim 1, characterized in that: In step S2, the soaking liquid includes the following components by weight: 35-45 g / L of liquid caustic soda, 6 g / L of hydrogen peroxide, 1-1.5 g / L of oxidative desizing agent TF-127K, 0.7-1.1 g / L of refining agent TF-188A, and 0.4-0.8 g / L of penetrant TF-107.

4. The preparation process of a bio-based PA510-Tencel blended fabric according to claim 1, characterized in that: In the step S3, the speed of the setting machine is 40-60 m / min, the temperature is 170-180° C., and the setting time is 40-50 seconds.

5. The preparation process of a bio-based PA510-Tencel blended fabric according to claim 1, characterized in that: In the step S4, the dye includes the following components by weight percentage: acid gray B-NS 0.8% to 1.2%, acid red B-NS 6% to 7%, and the balance is water; the auxiliary agent A includes the following components: ammonium sulfate 0.6 to 1g / L, glacial acetic acid 0.3 to 0.5g / L, acid dyeing treasure M-2200T 0.5 to 0.7g / L; the temperature for acid dye coloring is 90 to 100°C, the pH is 4-6, and the heat preservation dyeing is 40 to 60min.

6. The preparation process of a bio-based PA510-Tencel blended fabric according to claim 1, characterized in that: In the step S4, the preparation of the dyeing accelerator comprises the following steps: (1) 2-naphthylamine and ethyl formate are added to a reaction vessel, a solvent is added and stirred evenly, and N-(2-naphthyl)formamide is obtained by reaction. The reaction equation is as follows: 2-naphthylamine + ethyl formate → N-(2-naphthyl)formamide + ethanol; (2) Mixing N-(2-naphthyl)formamide with sodium hydroxide solution, and reacting under heating reflux conditions to hydrolyze the amide bond to generate N-(naphthyl-2-yl)amine. The reaction equation is as follows: N-(naphthalene-2-yl)formamide + NaOH → N-(naphthalene-2-yl)amine + HCCONa; (3) N-(naphthalene-2-yl)amine is dissolved in an anhydrous organic solvent, and a solution of 2-ethyl sulfonate isocyanate is slowly added dropwise at low temperature to react to generate N-(naphthalene-2-yl)-2-ethyl sulfonate carbamate. The reaction equation is as follows: N-(Naphthyl-2-yl)amine+2-sulfonic acid ethyl isocyanate→N-(Naphthyl-2-yl)-2-sulfonic acid ethyl carbamate.

7. The preparation process of a bio-based PA510-Tencel blended fabric according to claim 6, characterized in that: In the step (1), the molar ratio of 2-naphthylamine to ethyl formate is 1.2-1.5:2, and the solvent is ethanol; in the step (2), the molar ratio of N-(2-naphthyl)formamide to sodium hydroxide is 2.5-2.8:1.5-1.7; in the step (3), the molar ratio of N-(naphth-2-yl)amine to 2-ethyl sulfonate isocyanate is 1-2.2:2-2.5, and the anhydrous organic solvent is anhydrous tetrahydrofuran.

8. The preparation process of a bio-based PA510-Tencel blended fabric according to claim 1, characterized in that: In the step S5, auxiliary agent B is added to the reactive dye, and the mass ratio of the reactive dye to the auxiliary agent B is 13-15:1-2; the reactive dye comprises the following components in weight percentage: reactive red FN-3GL 0.8%-1.2%, reactive yellow 3RN 2%-4% and reactive blue FNG 2%-4%, and the balance is water; the auxiliary agent B comprises the following components: 28-32g / L of sodium sulfate and 18-22g / L of soda ash, the temperature is set to 100-105°C, and the dyeing is performed for 40-60min.

9. According to the preparation process of a bio-based PA510-Tencel blended fabric according to claim 1, it is characterized in that: In step S6, the specific steps of fixing the color are: washing the fabric in hot water at 40 to 60°C for 10 to 20 minutes, then putting the fabric in hot water at 70 to 80°C, adding 2g / L sodium carbonate fixing solution, soaking for 20 to 30 minutes for fixing the color, then washing with hot water at 40 to 60°C for 10 to 20 minutes, and finally washing with supercooled water to complete the fixing.

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