CN103952931A - Digital ink-jet printing method of low-urea silk fabric - Google Patents

Abstract

The invention relates to a digital ink-jet printing method of a low-urea silk fabric. The method comprises the following steps: firstly, carrying out a single-sided sizing pre-treatment on the silk fabric which is degummed and stentered by a sizing machine containing slurries such as a quaternary ammonium salt cationic modifier, guar gum and a low-urea wet absorption swelling agent; then, drying the fabric by an infrared drier at high frequency; then, jet-printing and steaming and fixing by regenerated active dye base ink; and finally, soaping by modified tea saponin, washing and drying to realize digital ink-jet printing of the low-urea silk fabric. According to the method provided by the invention, the silk fabric has good K/S value, fixation rate and wet-processing fastness, the use level of urea is reduced by 70-80%, and meanwhile, the utilization ratio of the active dye ink is increased, and finally, the burden of sewage treatment is alleviated. The method provided by the invention is a clean production method which satisfies the environmental requirement.

Description

A digital inkjet printing method for low urea silk fabric

technical field

The invention relates to a digital ink-jet printing method for low-urea silk fabrics, belonging to the technical field of digital ink-jet printing.

Background technique

A large amount of urea needs to be added in the printing process of reactive dyes. On the one hand, it acts as a solubilizing effect. On the other hand, urea acts as a hygroscopic and expanding effect. It can release the locked water during steaming, providing favorable conditions for the fixation of dyes and fibers, and making The fibers are fully swollen to accelerate dye fixation. However, when urea is discharged into the water, it is naturally decomposed into carbon dioxide and nitrogen-containing compounds. The latter can accelerate the growth of algal substances and eventually cause water eutrophication. It is also one of the main sources of chemical oxygen demand and ammonia nitrogen pollutants.

The new version of GB 4287-2012 "Water Pollutant Discharge Standards for Textile Dyeing and Finishing Industry" implemented on January 1, 2013 has increased the requirements for pollutant discharge control, including strict regulations on ammonia nitrogen, total nitrogen content and chemical oxygen demand. specific emission limits.

In terms of using urea substitutes, some use dicyandiamide (such as Matexil FN-T of ICI Company) and some additives (such as GOG-01 of Japan Senka Co., Ltd.) to replace urea, or they cannot get rid of the pollution to the environment. Or the effect is not ideal.

Therefore, research on improving the utilization rate and wet fastness of reactive dye inks on silk fabrics, reducing the amount of urea, and reducing the burden of sewage treatment has certain practical significance and value for people's livelihood.

Contents of the invention

Aiming at the above-mentioned deficiencies of the prior art, the purpose of the present invention is to reduce the consumption of urea in the digital ink-jet printing of real silk fabrics. The method of the invention improves the color yield of the reactive dye ink by cationic modification of the real silk fabric and adding a suitable hygroscopic bulking agent, and has better K/S value, color fixation rate and wet treatment fastness.

To achieve the above object, the present invention is achieved through the following technical solutions:

A digital inkjet printing method for low urea silk fabrics, comprising fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soap washing→hot water washing→cold water washing→stenter drying,

(1) The fabric pretreatment refers to the silk fabric after degumming and tentering, which is sizing on one side on the sizing machine, and the sizing includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent , sodium sulfate and water, each composition is as follows by weight percentage:

Quaternary ammonium salt cationic modifier 2%～15%

Guar gum 4%～12%

Sodium bicarbonate 2%～6%

Sodium sulfate 2%～6%

Hygroscopic swelling agent 6%～10%

The remainder is water;

(2) The radiation drying described above is infrared drying equipment, the drying temperature is 80-120°C, and the drying time is 3-5 minutes;

(3) The above-mentioned jet printing is generated by color card software, the printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK, the ink used for jet printing is regenerative reactive dye ink;

(4) The steaming is 30-50 minutes of reaction and color fixation under the condition of saturated steam at 100-110°C;

(5) The soaping time is 10-15 minutes at 98°C, and the soaping agent is 2-10 g/L of modified tea saponin.

Preferably, the hygroscopic swelling agent is at least two of urea, triethylene glycol and glycerin.

The beneficial effects of the present invention are as follows:

The method for digital inkjet printing of low urea silk fabrics of the present invention first carries out cationic modification to the real silk fabrics, has better color yield and wet treatment fastness; secondly reduces the urea consumption in the process of digital inkjet printing of real silk fabrics, alleviates The burden of sewage treatment caused by sewage discharge; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process. The invention has good K/S value, color fixation rate and wet treatment fastness on real silk fabrics, reduces the amount of urea by 70% to 80%, improves the utilization rate of reactive dye ink at the same time, and finally reduces the burden of sewage treatment. A clean production method that meets environmental protection requirements.

Detailed ways

The present invention will be further described below in conjunction with specific examples, but the protection scope of the present invention is not limited thereto.

The raw materials used in the present invention can be synthesized by methods known in the art, or commercially available products can be used.

Example 1

A kind of low urea real silk fabric digital inkjet printing method of the present embodiment comprises the following steps:

Fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soaping→hot water washing→cold water washing→stenter drying.

(1) Fabric pretreatment refers to the silk fabric after degumming and tentering, which is sizing on one side on the sizing machine. The size includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent, sodium sulfate and water, each composed as follows by weight percentage:

Quaternary ammonium salt cationic modifier 3%

Guar Gum 6%

Sodium bicarbonate 3%

Sodium Sulfate 3%

Hygroscopic swelling agent 8%

The balance is water

Wherein, the hygroscopic swelling agent is urea and triethylene glycol with a mass ratio of 2:8.

(2) Dry the silk fabric pretreated in step (1) with high-frequency drying under infrared drying equipment at a drying temperature of 80°C for 5 minutes, and set aside.

(3) Perform reactive dye inkjet printing on the silk fabric in step (2). The printing color is generated by the color card software. The printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK. The ink used for printing is Regenerated Magenta, a reactive dye ink.

(4) Steam the silk fabric printed in step (3) to fix the color, and react and fix the color under the condition of saturated steam at 102°C for 30 minutes.

(5) Wash the silk fabric in step (4), first with hot water, then with cold water, then soap at 98°C for 10 minutes, then with hot water at 60°C, then with cold water, and finally dry. Wherein, the soaping agent is modified tea saponin 5g/L.

The K/S value, color fixation rate and color fastness of the fabric finished by the above method were tested, and the test results are shown in Table 1. Table 1 is the performance index test table of the printing effect of real silk fabric in Example 1. The results in Table 1 show that digital inkjet printing of low urea silk fabrics can meet the requirements of GB 18401-2010 "National Basic Safety Technical Specifications for Textile Products" for textiles.

Table 1

It can be seen from this example that the cationic modification of silk fabrics in this example has better color yield and wet fastness; secondly, the amount of urea used in the digital inkjet printing process of silk fabrics is reduced to reduce the pollution caused by The burden of sewage treatment; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process.

Example 2

A kind of low urea real silk fabric digital inkjet printing method of the present embodiment comprises the following steps:

Fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soaping→hot water washing→cold water washing→stenter drying.

(1) Fabric pretreatment refers to the silk fabric after degumming and tentering, which is sizing on one side on the sizing machine. The size includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent, sodium sulfate and water, each composed as follows by weight percentage:

Quaternary ammonium salt cationic modifier 6%

Guar Gum 5%

Sodium bicarbonate 5%

Sodium Sulfate 2%

Hygroscopic swelling agent 6%

The balance is water

Wherein, the hygroscopic swelling agent is that the mass ratio of urea to glycerol is 3:7.

(2) Dry the silk fabric pretreated in step (1) with high-frequency drying under infrared drying equipment at a drying temperature of 120°C for 3 minutes, and set aside.

(3) Perform reactive dye inkjet printing on the silk fabric in step (2). The printing color is generated by the color card software. The printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK. The ink used for printing is Regenerated Black, a regenerative active dye ink.

(4) Steam the silk fabric printed in step (3) to fix the color, and react and fix the color under saturated steam conditions at 105°C for 30 minutes.

(5) Wash the silk fabric in step (4), first with hot water, then with cold water, then soap at 98°C for 15 minutes, then with hot water at 60°C, then with cold water, and finally dry. Wherein, the soaping agent is modified tea saponin 8g/L.

The K/S value, color fixation rate and color fastness of the fabric finished by the above method were tested, and the test results are shown in Table 2. Table 2 is the performance index test table of printing effect of real silk fabric in Example 2. The results in Table 2 show that the digital inkjet printing of low urea silk fabrics can meet the requirements of GB 18401-2010 "National Basic Safety Technical Specifications for Textile Products" for textiles.

Table 2

It can be seen from this example that the cationic modification of silk fabrics in this example has better color yield and wet fastness; secondly, the amount of urea used in the digital inkjet printing process of silk fabrics is reduced to reduce the pollution caused by The burden of sewage treatment; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process.

Example 3

A kind of low urea real silk fabric digital inkjet printing method of the present embodiment comprises the following steps:

Fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soaping→hot water washing→cold water washing→stenter drying.

(1) Fabric pretreatment refers to the silk fabric after degumming and tentering, which is sizing on one side on the sizing machine. The size includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent, sodium sulfate and water, each composed as follows by weight percentage:

Quaternary ammonium salt cationic modifier 15%

Guar Gum 12%

Sodium bicarbonate 6%

Sodium Sulfate 6%

Hygroscopic swelling agent 10%

The balance is water

Wherein, the hygroscopic swelling agent is triethylene glycol and glycerol with a mass ratio of 1:7.

(2) Dry the silk fabric pretreated in step (1) under high-frequency infrared drying equipment, the drying temperature is 100°C, and the drying time is 4 minutes, and it is ready for use.

(3) Perform reactive dye inkjet printing on the silk fabric in step (2). The printing color is generated by the color card software. The printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK. The ink used for printing is Regenerated Black, a regenerative reactive dye ink.

(4) Steam the silk fabric printed in step (3) to fix the color, and react and fix the color under saturated steam conditions at 110°C for 50 minutes.

(5) Wash the silk fabric in step (4), first with hot water, then with cold water, then soap at 98°C for 12.5 minutes, then with hot water at 60°C, then with cold water, and finally dry. Wherein, the soaping agent is modified tea saponin 10g/L.

The K/S value, color fixation rate and color fastness of the fabric finished by the above method were tested, and the test results are shown in Table 3. Table 3 is the performance index test table of the silk fabric printing effect in Example 3. The results in Table 3 show that digital inkjet printing of low urea silk fabrics can meet the requirements of GB 18401-2010 "National Basic Safety Technical Specifications for Textile Products" for textiles.

table 3

It can be seen from this example that the cationic modification of silk fabrics in this example has better color yield and wet fastness; secondly, the amount of urea used in the digital inkjet printing process of silk fabrics is reduced to reduce the pollution caused by The burden of sewage treatment; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process.

Example 4

A kind of low urea real silk fabric digital inkjet printing method of the present embodiment comprises the following steps:

Fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soaping→hot water washing→cold water washing→stenter drying.

(1) Fabric pretreatment refers to the silk fabric after degumming and tentering, which is sizing on one side on the sizing machine. The size includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent, sodium sulfate and water, each composed as follows by weight percentage:

Quaternary ammonium salt cationic modifier 10%

Guar Gum 10%

Sodium bicarbonate 4%

Sodium Sulfate 4%

Hygroscopic swelling agent 9%

The balance is water

Wherein, the hygroscopic swelling agent is urea, triethylene glycol and glycerin in a mass ratio of 1:3:7.

(2) Dry the silk fabric pretreated in step (1) under high-frequency infrared drying equipment at a drying temperature of 110°C for 4.5 minutes, and set aside.

(3) Perform reactive dye inkjet printing on the silk fabric in step (2). The printing color is generated by the color card software. The printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK. The ink used for printing is Regenerated Black, a regenerative reactive dye ink.

(4) Steam the silk fabric printed in step (3) for color fixation, and react for color fixation under saturated steam conditions at 100°C for 40 minutes.

(5) Wash the silk fabric in step (4), first with hot water, then with cold water, then with soap at 98°C for 13 minutes, then with hot water at 60°C, then with cold water, and finally dry. Wherein, the soaping agent is modified tea saponin 2g/L.

The K/S value, color fixation rate and color fastness of the fabric finished by the above method were tested, and the test results are shown in Table 4. Table 4 is the performance index test table of printing effect of real silk fabric in Example 4. The results in Table 4 show that digital inkjet printing of low urea silk fabrics can meet the requirements of GB 18401-2010 "National Basic Safety Technical Specifications for Textile Products" for textiles.

Table 4

It can be seen from this example that the cationic modification of silk fabrics in this example has better color yield and wet fastness; secondly, the amount of urea used in the digital inkjet printing process of silk fabrics is reduced to reduce the pollution caused by pollution. The burden of sewage treatment; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process.

Example 5

A kind of low urea real silk fabric digital inkjet printing method of the present embodiment comprises the following steps:

Fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soaping→hot water washing→cold water washing→stenter drying.

(1) Fabric pretreatment means that the silk fabric after degumming and tentering is sizing on one side on the sizing machine, and the sizing includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent, sodium sulfate and water, each composed as follows by weight percentage:

Quaternary ammonium salt cationic modifier 8.5%

Guar Gum 8%

Sodium bicarbonate 2%

Sodium Sulfate 5%

Hygroscopic swelling agent 7%

The balance is water

Wherein, the hygroscopic swelling agent is urea, triethylene glycol and glycerin in a mass ratio of 2:5:7.

(2) Dry the silk fabric pretreated in step (1) under high-frequency infrared drying equipment at a drying temperature of 90°C for 3.5 minutes, and set aside.

(3) Perform reactive dye inkjet printing on the silk fabric in step (2). The printing color is generated by the color card software. The printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK. The ink used for printing is Regenerated Black, a regenerative reactive dye ink.

(4) Steam the silk fabric printed in step (3) to fix the color, and react and fix the color under the condition of saturated steam at 109°C for 45 minutes.

(5) Wash the silk fabric in step (4), first with hot water, then with cold water, then with soap at 98°C for 14 minutes, then with hot water at 60°C, then with cold water, and finally dry. Wherein, the soaping agent is modified tea saponin 4g/L.

The K/S value, color fixation rate and color fastness of the fabric finished by the above method were tested, and the test results are shown in Table 5. Table 5 is the performance index test table of printing effect of real silk fabric in Example 5. The results in Table 5 show that the digital inkjet printing of low urea silk fabrics can meet the requirements of GB 18401-2010 "National Basic Safety Technical Specifications for Textile Products" for textiles.

table 5

It can be seen from this example that the cationic modification of silk fabrics in this example has better color yield and wet fastness; secondly, the amount of urea used in the digital inkjet printing process of silk fabrics is reduced to reduce the pollution caused by The burden of sewage treatment; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process.

Example 6

A kind of low urea real silk fabric digital inkjet printing method of the present embodiment comprises the following steps:

Fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soaping→hot water washing→cold water washing→stenter drying.

(1) Fabric pretreatment refers to the silk fabric after degumming and tentering, which is sizing on one side on the sizing machine. The size includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent, sodium sulfate and water, each composed as follows by weight percentage:

Quaternary ammonium salt cationic modifier 2%

Guar Gum 4%

Sodium bicarbonate 2%

Sodium Sulfate 2%

Hygroscopic swelling agent 6%

The balance is water

Wherein, the hygroscopic swelling agent is urea and glycerol with a mass ratio of 3:7.

(2) Dry the silk fabric pretreated in step (1) with high-frequency drying under infrared drying equipment at a drying temperature of 105°C and a drying time of 4.8 minutes, and set aside.

(3) Perform reactive dye inkjet printing on the silk fabric in step (2). The printing color is generated by the color card software. The printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK. The ink used for printing is Regenerated Black, a regenerative active dye ink.

(4) Steam the silk fabric printed in step (3) to fix the color, and react and fix the color under saturated steam conditions at 110°C for 35 minutes.

(5) Wash the silk fabric in step (4), first with hot water, then with cold water, then soap at 98°C for 14.5 minutes, then with hot water at 60°C, then with cold water, and finally dry. Wherein, the soaping agent is modified tea saponin 3g/L.

The K/S value, color fixation rate and color fastness of the fabrics treated by the above method were tested, and the test results are shown in Table 6, which is the performance index test table of printing effect of silk fabrics in Example 6. The results in Table 6 show that digital inkjet printing of low urea silk fabrics can meet the requirements of GB 18401-2010 "National Basic Safety Technical Specifications for Textile Products" for textiles.

Table 6

It can be seen from this example that the cationic modification of silk fabrics in this example has better color yield and wet fastness; secondly, the amount of urea used in the digital inkjet printing process of silk fabrics is reduced to reduce the pollution caused by The burden of sewage treatment; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process.

To sum up, compared with the original traditional process, the digital inkjet printing method of low urea silk fabric in the embodiment 1 to the embodiment 6 of the present invention has better environmental protection and application effect.

The method for digital inkjet printing of low urea silk fabrics of the present invention first carries out cationic modification to the real silk fabrics, has better color yield and wet treatment fastness; secondly reduces the urea consumption in the process of digital inkjet printing of real silk fabrics, alleviates The burden of sewage treatment caused by sewage discharge; the natural raw material tea saponin is used again as a soaping agent, which is low in toxicity, easy to degrade and reduces environmental pollution. Therefore, the digital ink-jet printing method for low-urea silk fabrics of the present invention has better environmental protection and application effects than the original traditional process. The invention has good K/S value, color fixation rate and wet treatment fastness on real silk fabrics, reduces the amount of urea by 70% to 80%, improves the utilization rate of reactive dye ink at the same time, and finally reduces the burden of sewage treatment. A clean production method that meets environmental protection requirements.

The above-mentioned embodiments are only used to explain the inventive concept of the present invention, but not to limit the protection of the rights of the present invention. Any insubstantial changes made to the present invention by using this concept should fall within the scope of protection of the present invention.

Claims (2)

1. A digital inkjet printing method for low urea silk fabrics, comprising fabric pretreatment→radiation drying→jet printing→steaming→cold water washing→hot water washing→soaping→hot water washing→cold water washing→stenter drying, which Characterized by: (1) The fabric pretreatment refers to the silk fabric after degumming and tentering, which is sizing on one side on the sizing machine, and the sizing includes quaternary ammonium salt cationic modifier, guar gum, sodium bicarbonate, hygroscopic swelling agent , sodium sulfate and water, each composition is as follows by weight percentage: Quaternary ammonium salt cationic modifier 2%～15% Guar gum 4%～12% Sodium bicarbonate 2%～6% Sodium sulfate 2%～6% Hygroscopic swelling agent 6%～10% The remainder is water; (2) The radiation drying described above is infrared drying equipment, the drying temperature is 80-120°C, and the drying time is 3-5 minutes; (3) The above-mentioned jet printing is generated by color card software, the printing conditions are: printing accuracy 360×2160dpi, 360×2160 6pass CMYK, the ink used for jet printing is regenerative reactive dye ink; (4) The steaming is 30-50 minutes of reaction and color fixation under the condition of saturated steam at 100-110°C; (5) The soaping time is 10-15 minutes at 98°C, and the soaping agent is 2-10 g/L of modified tea saponin. 2. The digital ink-jet printing method for low urea silk fabrics according to claim 1, characterized in that: the hygroscopic bulking agent is at least two of urea, triethylene glycol and glycerin.