CN111235911A - Alkaline rapid printing method for chinlon 56 fiber and fabric - Google Patents

Abstract

The invention discloses an alkaline rapid printing method for nylon 56 fibers and fabrics. The alkaline printing method comprises the following steps: the chinlon 56 fabric and the fabric thereof are printed by adopting vat dye, sulfur dye, reactive dye or direct dye. The printing method provided by the invention has the following advantages: the chinlon 56 can be printed by various dyes, and has complete color spectrum and good color fastness. The printing method has the advantages of simple process, low energy consumption and clear pattern, and compared with nylon 66, the printing method has obviously large apparent depth and the printed fabric has soft hand feeling.

Description

Alkaline rapid printing method for chinlon 56 fiber and fabric

Technical Field

The invention relates to an alkaline rapid printing method for nylon 56 fibers and fabrics, belonging to the field of textile dyeing and finishing.

Background

Polyamide fiber, also known as nylon and abbreviated as Polyamide (PA), is a generic name of thermoplastic resins having a repeating amide group (-NHCO-) in the main molecular chain, is the first synthetic fiber in the world, and is considered to be one of the 100 most prominent inventions affecting human life in the 20 th century. The fiber has high strength, light weight, easy maintenance, good wear resistance, wind resistance and water resistance, is popular once coming out of the world, and is widely applied in the fields of chemical fiber industry, engineering plastics, national defense construction and the like.

In 1938, Dupont produced polyamide 66 fiber for the first time, and in 1939, the industrial production was realized. The commercialization of polyamide 66 in the united states has also led to a strong competition between the technologies of the related art and the market. The Schlack of Germany invented polyamide 6 fiber synthesized by monomer raw material caprolactam in 1938 and its production technology, and its industrial production was realized in 1941. Subsequently, large enterprises in britain, france, italy, west de, japan, and the like have also successively developed and put into production polyamide fiber products, thereby further expanding the productivity of polyamide fibers.

The development of polyamide 66 in China began in the 50 th 20 th century, and because the polyamide fiber is successfully prepared in Jinzhou for the first time, the polyamide fiber is also called chinlon in China. At present, the annual output of more than 10 chinlon 66 fiber production enterprises in China is about 30 ten thousand tons.

Most of the traditional nylon fibers are prepared by petroleum base, while the novel nylon 56 fibers are novel bio-based fibers which are prepared by biological, chemical and physical means and the like, wherein the raw materials can be derived from crops, trees and other plants and residues and inclusions thereof. The chinlon 56 is similar to chinlon 66 in the aspects of oil resistance, wear resistance, corrosion resistance, fatigue resistance, high strength and the like, and is superior to chinlon 6, but due to the structural difference between chinlon 56 and chinlon 66, the dyeing property and the flame retardant property of chinlon 56 are more excellent.

Disclosure of Invention

The invention aims to provide an alkaline rapid printing method for nylon 56 fibers and fabrics, which has the advantages of low temperature, rapidness, deep color and the like.

The alkaline printing method of the chinlon 56 fiber and the fabric provided by the invention comprises the following steps: preparing printing paste by adopting one of vat dye, reactive dye, direct dye and sulfur dye and an auxiliary agent, and printing and post-treating the chinlon 56 fabric to obtain a printing sample;

the content of the terminal amino groups of the chinlon 56 fiber can be 20mol/10⁶gr～80mol/10⁶gr, preferably 20mol/10⁶gr～60mol/10⁶gr, more preferably 30 to 50mol/10⁶gr; more specifically 45.2mol/10⁶gr；

The content of terminal carboxyl groups of the chinlon 56 fiber can be 50mol/10⁶gr～110mol/10⁶gr, preferably 60mol/10⁶gr～90mol/10⁶gr, more preferably 70 to 85mol/10⁶gr; more specifically 74.3mol/10⁶gr。

The nylon 56 fabric is a woven fabric, a knitted fabric or a non-woven fabric.

In the alkaline bath printing method, the chinlon 56 fiber can be prepared by a melt direct spinning method or a melt intermittent spinning method;

adjusting the pH value of the chinlon 56 salt solution to 7.5-8.5, preferably 7.5-8.0;

the printing mode adopted by the invention is flat screen printing or rotary screen printing.

Specifically, the printing comprises the following steps:

preparing printing paste by using dye, printing paste, printing auxiliary agent and water; printing the chinlon 56 fabric or non-woven fabric by using the printing paste, and then drying, steaming and post-treating the printed fabric or non-woven fabric;

the dye is the vat dye, the sulfur dye, the reactive dye or the direct dye;

in the method, the printing paste comprises the following components in percentage by weight:

1-5% of a dye;

3-80% of printing paste;

0.1-15% of printing auxiliary agent;

the balance of water; namely adding water to synthesize 100 percent of printing paste;

the pH value of the printing color paste is 7.1-8.5;

the printing paste can be composed of any one of the following components in percentage by weight:

1) 3% of dye; 60% of printing paste; 9.5% of printing auxiliary agent (5% of reducing agent, 3% of alkaline agent and 1.5% of leveling agent), and the balance of water; the pH value is 7.5;

2) 2% of dye; 60% of printing paste; 12% of printing auxiliary agent (5% of reducing agent, 5% of alkaline agent and 2% of retarding agent), and the balance of water; the pH value is 8.0;

3) 2% of dye; 70% of printing paste; 11% of printing auxiliary agent (5% of urea, 1% of dye-resistant salt, 2% of color fixing agent and 3% of leveling agent), and the balance of water; the pH value is 7.8;

4) 2% of dye; 70% of printing paste; 6% of printing auxiliary agent (3% of sodium chloride, 3% of retarding agent) and the balance of water; the pH value is 7.5;

the printing paste is a printing thickener, and specifically can be wheat starch, guar gum, cassava powder or carboxymethyl cellulose (CMC paste);

the printing auxiliary agent is at least one of a vat dye reducing agent, a sulfur dye reducing agent, an alkaline agent, a pH regulator and a dyeing rate regulator.

In the method, the pH regulator is used for regulating the pH value of the printing paste, and the dye liquor is regulated to the required pH value; the pH value regulator is selected from at least one of acid, alkali, acid oxide, alkali oxide, weak acid strong alkali salt and strong acid weak alkali; specifically at least one selected from acetic acid, sodium hydroxide, calcium oxide, sodium carbonate and 1% aqueous solution of ammonium chloride;

the printing auxiliary agent can be sodium hydrosulfite, rongalite, sodium salt of sulfinic acid derivative, sulfur, sodium sulfide, sodium polysulfide solution, potassium carbonate, sodium carbonate, caustic soda, sodium bicarbonate, sodium phosphate, urea, dye-resistant salt S, sodium chloride or anhydrous sodium sulphate;

the dyeing rate regulator in the printing auxiliary agent is a chinlon dyeing rate regulator, and has the functions of slow dyeing and dye blocking on chinlon dyeing, so that the fibers are uniformly dyed; the chinlon dyeing rate regulator can be specifically a dye-release agent NLJ, a dye-release agent JV-905, a dye-release agent NL-90, a dye-release agent NL, a dye-release agent MCH-312, a dye-release agent GC-230, a dye-release agent JV-1 or a dye-release agent HJ-219;

the printing process of the leuco body is specifically adopted when the vat dye and the sulfur dye are adopted for printing;

when the vat dye is used for printing, the printing auxiliary agent can be a reducing agent (one of sodium hydrosulfite, rongalite and sodium salt of a sulfinic acid derivative), an alkaline agent (one of potassium carbonate, sodium carbonate and caustic soda) and a nylon dyeing rate regulator;

when the sulfur dye is used for printing, the printing auxiliary agent can be a reducing agent (sulfur, sodium sulfide, sodium polysulfide solution) and a polyamide dyeing rate regulator;

when the reactive dye is used for printing, the printing auxiliary agent can be urea, dye-resistant salt S, an alkaline agent (sodium carbonate and/or sodium bicarbonate and/or sodium hydroxide and/or sodium phosphate) for fixing color and a nylon dyeing rate regulator.

When the direct dye is used for printing, the printing auxiliary agent can be a chinlon dyeing rate regulator, sodium chloride and/or anhydrous sodium sulphate; the anhydrous sodium sulphate and the sodium chloride are selected from one of the two;

the drying conditions were as follows: the temperature can be 80-90 ℃; the time can be 1-10 min, specifically 3-5 min;

the conditions for the steaming were as follows: the temperature can be 60-100 ℃; specifically 80 deg.C, 85 deg.C or 95 deg.C; the time can be 1-25 min, specifically 3, 8 or 12 min.

When the vat dye is used for printing, the post-treatment comprises the following steps: oxidizing, washing with hot water, soaping, washing with water at normal temperature and drying;

when the sulfur dye is used for printing, the post-treatment comprises the following steps: oxidation, hot water washing, anti-brittleness treatment, soaping, normal-temperature water washing and air drying;

the oxidation and water washing processes of the vat dye and the sulfur dye are the same, and methods such as cold water leaching (oxygen oxidation in water), ventilation oxidation (air oxidation), oxidant oxidation and the like are generally adopted.

When an oxidant oxidation method is adopted, the oxidant oxidation method can be combined with the next step of hot washing, and a sample is directly subjected to an oxidation washing step; wherein the oxidant is at least one selected from hydrogen peroxide, sodium perborate and sodium dichromate; the dosage of the oxidant is 1-5 g/L, and specifically comprises the following components: 1g/L hydrogen peroxide or 2g/L sodium perborate;

the oxidation treatment process comprises the following steps: the temperature is 40-50 ℃; the temperature can be specifically 45 ℃; the time is 1-15 min; specifically, the treatment can be carried out at 50 ℃ for 10min, at 40 ℃ for 3min or at 45 ℃ for 2 min;

the sulfur dye anti-brittleness treatment comprises the following steps: soaking the raw materials in an anti-embrittlement agent at room temperature;

the anti-brittle agent can be one or a compound auxiliary agent of urea, Turkey red oil, soda ash, trisodium phosphate, bone glue, copper acetate, dicyandiamide, melamine or triethanolamine, and the dosage is 0.5-5% (o.w.f.); in particular to 1 percent; soaking for 1-10 min at room temperature; specifically 3 min; the bath ratio is 1: 5-15;

the dyeing post-treatment also comprises hot water washing, soaping, normal-temperature water washing and airing;

and (3) hot water flushing: 50-80 ℃;

the soaping process comprises the following steps: 1-5 g/L of soap chips; in particular to 2 g/L; 0-3 g/L of anhydrous sodium carbonate; soaping at 50-80 deg.C (specifically 60 deg.C) for 5-15 min (specifically 10 min); the bath ratio is 1: 5-15; specifically 1: 10.

When the reactive dye and the direct dye are used for printing, the post-treatment comprises the following steps: washing with hot water, soaping, washing with hot water, washing with water at room temperature, and air drying;

and (3) hot water flushing: 50-80 DEG C

The soaping process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of sodium carbonate; soaping at 50-80 ℃ for 5-15 min, wherein the bath ratio is 1: 5-15.

The vat dye is selected from at least one of an indigoid vat dye, a condensed ring ketone vat dye and a temporary soluble vat dye;

specifically selected from at least one of vat yellow G, vat blue RSN, vat HD blue, vat HD yellow, vat navy 5508, vat green FFB, vat olive green B, vat yellow F3G, Kedeline blue BS-03, vat olive MW, vat black GM, vat direct black RB, vat brown R, vat yellow 3RT, vat scarlet R, vat scarlet 6B, vat golden RK, vat black GM and vat blue RC;

the active dye is selected from at least one of halogenated s-triazine, halogenated pyrimidine, vinyl sulfone, complex (multi-active group), epoxy and azide;

the reactive dye can BE at least one selected from reactive navy blue KE-R, reactive red KE-3B (bis-monochlorotriazine), reactive red 3BS (mono-chlorotriazine + vinylsulfone), reactive red M-RBE (vinylsulfone), annonin red jade DR (bis-vinylsulfone), reactive brilliant blue BRV, reactive blue KN-R, annonin bright yellow 4GL, annonin yellow 3RE 150%, annonin red 3BE 150%, annonin blue M-2GE, annonin bright blue RV 100%, annonin yellow brown NC, annonin red jade NC and annonin black NC;

the direct dye is selected from at least one of azos, direct copper salts, copper salt complex direct dyes, direct diazo, dioxazine and phthalocyanine;

in particular direct orange S, direct scarlet 4BE, direct copper blue 2R or direct turquoise blue B2 RL;

the sulfur dye is at least one selected from powdered sulfur dye, sulfur reduction dye and sulfur polycondensation dye;

specifically, the sulfur-containing material is sulfur blue BRN, sulfur red GGF, sulfur yellow GC or sulfur black 2 BR;

the printing method provided by the invention has the following advantages: the chinlon 56 can be printed by various dyes, and has complete color spectrum and good color fastness. The printing method has the advantages of simple process, low energy consumption and clear pattern, and compared with nylon 66, the printing method has obviously large apparent depth and the printed fabric has soft hand feeling.

Drawings

FIG. 1 shows the dyeing effect of nylon 56 fibers with different terminal amino group contents, wherein the left graph is a sample No. 1, and the right graph is a sample No. 3.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples, but the present invention is not limited to the following examples. The method is a conventional method unless otherwise specified. The starting materials are commercially available from the open literature unless otherwise specified.

The nylon 56 fiber adopted by the embodiment of the invention is prepared by the following method:

preparing a chinlon 56 salt water solution with the concentration of 50 wt% in a salt solution tank, and specifically comprising the following steps: adding 90kg of chinlon 56 dry salt into 55kg of desalted water, completely dissolving, and adjusting the pH value of a salt solution to 7.5-8.5. After preparing salt solution, heating a salt solution tank to 50 ℃, opening a feeding valve to inject the salt solution into a polymerization reaction kettle to start prepolymerization when the temperature reaches a set temperature, wherein the prepolymerization test conditions are as follows: the temperature in the reaction kettle is set to be 212 ℃, the pressure is 1.75MPa, the stirring speed is 60r/min, the reaction is carried out for 2 hours, and then the temperature is raised to be 250 ℃. And (3) when the temperature reaches 250 ℃, reducing the pressure for about 1h, raising the temperature of the reaction kettle to 270 ℃ while reducing the pressure, vacuumizing for about 10min, raising the temperature in the kettle to 275 ℃, completing the polymerization reaction, directly discharging materials, cooling by cold water and air blowing, and cutting by a granulator to obtain the chinlon 56 slices. Drying the slices at 80 ℃ for 22h, and setting spinning conditions as follows: the spinning temperature is 288 ℃, the rotating speed of a metering pump is 16rpm/min, the spinning speed is 1000m/min, the side blowing air pressure is 450pa, the concentration of a winding oiling agent F5103 is 5%, and the drafting multiple and the heating temperature are as follows: the first drawing ratio is 2.5-3.5; the secondary draft ratio is 1.01-1.42; the temperature of the drawing box is 170 ℃; the second pulling temperature is 180 ℃; the temperature of the hot plate is 200 ℃; the temperature of the three-pulling process is 180 ℃. And (4) winding to obtain the nylon 56 fiber.

The pH values of the different salt solutions are shown in Table 1 for different end groups and carboxyl contents of the fibers (the draft control is 3.5).

As can be seen from the data in Table 1, when the pH of the aqueous salt solution is less than 7.5, the terminal group content is low, and when the pH of the aqueous salt solution is greater than 8.5, the acid-amine ratio of the reaction raw material is unbalanced, and polymerization cannot be performed, so that the optimum pH range is 7.5 to 8.0.

TABLE 1 influence of different salt solution pH values on the terminal amino group content of nylon 56 fiber

Dyeing is carried out on a sample No. 1 and a sample No. 3, a dye active navy blue KE-R is selected, 2% (o.w.f.) of dye liquor is prepared, the pH value of the dye liquor is 7.3, and a leveling agent JV-1 of 1.5% (o.w.f.) is added, wherein the dyeing bath ratio is 1: 10. Adding 2g of dyed materials (1# and 3#) with different terminal amino group contents at normal temperature; and then heating to 50 ℃ at the heating rate of 2 ℃/min, preserving heat for 20min, heating to 65 ℃ again, adding 10g/L sodium bicarbonate for fixation, preserving heat for 15min, cooling, taking out a sample, washing with 50 ℃ hot water, soaping (2g/L of soap chips, 10min of soaping at 50 ℃, bath ratio of 1:10), washing with 50 ℃ hot water, washing with room temperature water, and drying in the air to finish dyeing. The staining effect is shown in FIG. 1, the left panel is sample # 1, and the right panel is sample # 3. According to the above fiber preparation protocol, a saline solution was prepared at pH 7.85 and the content of terminal amino groups was measured to be 45.2mol/10⁶gr, carboxyl end group content 74.3mol/10⁶And (g) gr. The nylon 56 plain weave fabric is prepared from the fibers, and the gram weight of a finished product is 190g/m²For the next printing process.

Example 1 printing of Nylon 56 Gray Fabric with Vat dyes

Preparing 100g of printing paste, reducing blue RSN dye: 3 percent; wheat starch paste: 60 percent; reducing agent sodium hydrosulfite: 5 percent; alkaline agent potassium carbonate: 3 percent; leveling agent NL-901.5%; the balance of water, and the pH value is adjusted to 7.5. Spreading 15cm × 15cm nylon 56 grey cloth on a printing table, covering a printing flat screen on a fabric to be printed, pouring printing color paste at a non-pattern position at one end of the flat screen, scraping the paste once with a scraper at constant speed and force, lifting the flat screen, and drying the printed fabric for 5min at 80 ℃. Wrapping the dried fabric with lining cloth, steaming in a steamer at 95 ℃ for 3min, taking out the steamed fabric, oxidizing at 40 ℃ (1g/L hydrogen peroxide, 3min), washing with hot water at 50 ℃, washing with soap (2g/L soap solution, 60 ℃, 10min, bath ratio of 1:10) and washing with normal temperature water, and air drying to finish the fabric printing.

Comparative example 1, the same process as in example 1 was used to print a commercial nylon 66 fabric.

The test results after printing with vat dyes are listed in table 2.

Example 2 alkaline bath printing of Nylon 56 fiber Fabric Using leuco Sulfur dye

Preparing 100g of printing paste and vulcanized red GGF dye: 2 percent; CMC paste: 60 percent; sodium sulfide: 5 percent; dye retarding agent JV-9052%; the balance of water, and the pH value is adjusted to 8.0.

Spreading 15cm × 15cm nylon 56 grey cloth on a printing table, covering a printing flat screen on a fabric to be printed, pouring printing color paste at a non-pattern position at one end of the flat screen, scraping the paste once with a scraper at constant speed and force, lifting the flat screen, and drying the printed fabric for 3min at 90 ℃. Wrapping the dried fabric with lining cloth, steaming in a steamer at 90 ℃ for 8min, taking out the steamed fabric, oxidizing at 45 ℃ (2g/L of sodium perborate for 2min), washing with hot water at 50 ℃, performing anti-brittleness treatment (1% urea is subjected to anti-brittleness treatment at normal temperature for 3min), washing with soap (2g/L of soap solution, 60 ℃, 10min, and a bath ratio of 1:10) at normal temperature, washing with water at normal temperature, and airing to finish fabric printing.

In comparison example 2, the same process as in example 2 is adopted to print the commercial nylon 66 fabric.

The test results after printing with sulphur dyes are given in table 2.

Example 3 printing of Nylon 56 Gray Fabric with reactive dyes

Matching with 100g of printing paste and active bright yellow 4GL dye: 2 percent; cassava flour paste: 70 percent; urea 5%, resist salt S1%, sodium bicarbonate (fixing agent): 2 percent; leveling agent JV-13%; the balance of water, and the pH value is adjusted to 7.8. Spreading 15cm × 15cm nylon 56 grey cloth on a printing table, covering a printing flat screen on a fabric to be printed, pouring printing color paste at a non-pattern position at one end of the flat screen, scraping the paste once with a scraper at constant speed and force, lifting the flat screen, and drying the printed fabric for 5min at 80 ℃. Wrapping the dried fabric with lining cloth, steaming in a steamer at 80 ℃ for 15min, taking out the steamed fabric, washing with hot water at 50 ℃, washing with soap (2g/L of soap solution, 60 ℃, 10min, bath ratio 1:10) once, washing with hot water at 50 ℃ once, washing with normal temperature water once, and drying to finish the printing of the fabric.

Comparative example 3, a commercial nylon 66 fabric was printed by the same process as in example 3.

The test results after printing with reactive dyes are given in table 2.

Example 4 alkaline pad dyeing of Nylon 56 fiber Fabric with direct dyes

And (3) matching 100g of printing paste, and directly using turquoise blue B2RL dye: 2 percent; CMC paste: 70 percent; 3% of sodium chloride; NLJ 3% of a slow-dyeing agent; the balance of water, and the pH value is adjusted to 7.5.

Spreading 15cm × 15cm nylon 56 grey cloth on a printing table, covering a printing flat screen on a fabric to be printed, pouring printing color paste at a non-pattern position at one end of the flat screen, scraping the paste once with a scraper at constant speed and force, lifting the flat screen, and drying the printed fabric for 5min at 80 ℃. Wrapping the dried fabric with lining cloth, steaming in a steamer at 85 ℃ for 12min, taking out the steamed fabric, washing once at 50 ℃ in hot water, washing once (2g/L of soap solution, 60 ℃, 10min, bath ratio 1:10), washing once at 50 ℃ in hot water, washing once at normal temperature, airing, and finishing the printing of the fabric.

Comparative example 4, a commercial nylon 66 fabric was printed using the same process as in example 4.

The test results after direct dye printing are listed in table 2.

TABLE 2 basic dye printing test results for Nylon 56

As can be seen from the printing effects of the above examples and comparative examples, the good printing effect of the chinlon 56 can be realized at a lower steaming temperature, the apparent depth of the chinlon 56 is larger than that of the chinlon 66 under the same printing condition, the printed patterns have a permeable dyeing effect, the printing color of the chinlon 66 is light and easy to fall off, the color fastness of the chinlon 56 and the chinlon 66 is compared, the color fastness of each item of the chinlon 56 can reach more than 3-4 grade, and the color fastness of most chinlon 66 is poorer, so that the application requirement cannot be met.

Claims (10)

1. An alkaline printing method of chinlon 56 fiber and fabric comprises the following steps:

preparing printing paste by adopting one of vat dye, reactive dye, direct dye and sulfur dye and an auxiliary agent, and printing and post-treating the chinlon 56 fabric to obtain a printing sample;

the content of terminal amino groups of the chinlon 56 fiber is 20mol/10⁶gr～80mol/10⁶gr, carboxyl end group content 50mol/10⁶gr～110mol/10⁶gr；

The nylon 56 fabric is a woven fabric, a knitted fabric or a non-woven fabric.

2. The alkaline printing process according to claim 1, characterized in that: the printing process comprises the following steps:

preparing printing paste by using dye, printing paste, printing auxiliary agent and water; printing the chinlon 56 fabric or non-woven fabric by using the printing paste, and then drying, steaming and post-treating the printed fabric or non-woven fabric;

the dye is the vat dye, the reactive dye, the direct dye, or the sulfur dye.

3. The alkaline printing process according to claim 2, characterized in that: the printing paste comprises the following components in percentage by weight:

1-5% of a dye;

3-80% of printing paste;

0.1-15% of printing auxiliary agent;

the balance of water;

the pH value of the printing color paste is 7.1-8.5.

4. The alkaline printing process according to claim 2 or 3, characterized in that: the printing paste is a printing thickener, and specifically can be wheat starch, guar gum, cassava flour or carboxymethyl cellulose;

the printing auxiliary agent is at least one of a vat dye reducing agent, a sulfur dye reducing agent, an alkaline agent, a pH regulator and a dyeing rate regulator.

5. The alkaline printing process according to any of claims 2 to 4, characterized in that: the drying conditions were as follows: the temperature is 80-90 ℃, and the time is 1-10 min;

the conditions for the steaming were as follows: the temperature is 60-100 ℃, and the time is 1-25 min.

6. The alkaline printing process according to any of claims 1 to 5, characterized in that: when the vat dye is used for printing, the post-treatment comprises the following steps: oxidizing, washing with hot water, soaping, washing with water at normal temperature and drying;

when the sulfur dye is used for printing, the post-treatment comprises the following steps: oxidation, hot water washing, anti-brittleness treatment, soaping, normal-temperature water washing and air drying;

the oxidation and water washing processes of the vat dye and the sulfur dye are the same, and cold water leaching, ventilation oxidation or oxidant oxidation is adopted;

when the oxidizing agent oxidation method is adopted, the oxidizing agent oxidation method can be combined with the next step of hot washing, and a sample is directly subjected to an oxidizing and washing step; wherein the oxidant is at least one selected from hydrogen peroxide, sodium perborate and sodium dichromate; the dosage of the oxidant is 1-5 g/L;

the oxidation treatment process comprises the following steps: the temperature is 40-50 ℃; the time is 1-15 min;

the sulfur dye anti-brittleness treatment comprises the following steps: soaking the raw materials in an anti-embrittlement agent at room temperature;

the anti-brittle agent can be one or a compound auxiliary agent of urea, Turkey red oil, soda ash, trisodium phosphate, bone glue, copper acetate, dicyandiamide, melamine or triethanolamine, and the dosage is 0.5-5% (o.w.f.); soaking for 1-10 min at room temperature; the bath ratio is 1: 5-15;

the dyeing post-treatment also comprises hot water washing, soaping, normal-temperature water washing and airing;

and (3) hot water flushing: 50-80 ℃;

the soaping process comprises the following steps: 1-5 g/L of soap chips; 0-3 g/L of anhydrous sodium carbonate; soaping for 5-15 min at 50-80 ℃; the bath ratio is 1: 5-15.

7. The alkaline printing process according to any one of claims 1 to 6, wherein: when the reactive dye and the direct dye are used for printing, the post-treatment comprises the following steps: washing with hot water, soaping, washing with hot water, washing with water at room temperature, and air drying;

and (3) hot water flushing: 50-80 ℃;

the soaping process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of sodium carbonate; soaping at 50-80 ℃ for 5-15 min, wherein the bath ratio is 1: 5-15.

8. The alkaline printing process according to any one of claims 1 to 7, wherein: the vat dye is selected from at least one of an indigoid vat dye, a fused ring ketone vat dye and a temporary soluble vat dye;

specifically selected from at least one of vat yellow G, vat blue RSN, vat HD blue, vat HD yellow, vat navy 5508, vat green FFB, vat olive green B, vat yellow F3G, Kedeline blue BS-03, vat olive MW, vat black GM, vat direct black RB, vat brown R, vat yellow 3RT, vat scarlet R, vat scarlet 6B, vat golden RK, vat black GM and vat blue RC.

9. The alkaline printing process according to any one of claims 1 to 8, wherein: the active dye is selected from at least one of halogenated s-triazine, halogenated pyrimidine, vinyl sulfone, complex (multi-active group), epoxy and azide;

the reactive dye is selected from at least one of reactive navy blue KE-R, reactive red KE-3B (bis-monochlorotriazine), reactive red 3BS (mono-chlorotriazine + vinylsulfone), reactive red M-RBE (vinylsulfone), annonin jasper DR (bis-vinylsulfone), reactive brilliant blue BRV, reactive blue KN-R, annonin bright yellow 4GL, annonin yellow 3RE 150%, annonin red 3BE 150%, annonin blue M-2GE, annonin bright blue RV 100%, annonin yellow brown NC, annonin red jade NC and annonin black NC.

10. The alkaline printing process according to any one of claims 1 to 9, wherein: the direct dye is selected from at least one of azos, direct copper salts, copper salt complex direct dyes, direct diazo, dioxazine and phthalocyanine;

in particular direct orange S, direct scarlet 4BE, direct copper blue 2R or direct turquoise blue B2 RL;

the sulfur dye is at least one selected from powdered sulfur dye, sulfur reduction dye and sulfur polycondensation dye;

in particular to sulphur blue BRN, sulphur red GGF, sulphur yellow GC or sulphur black 2 BR.

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