Alkali gel degumming method for silk chiffon fabric

Abstract

The invention relates to the technical field of printing and dyeing processes, in particular to a silk chiffon fabric alkali gel degumming method which comprises the following steps: S1, adding a small amount of food-grade sodium polyacrylate into a sodium hydroxide solution at a constant speed, and continuously and fully stirring by using an electric stirrer to uniformly stir the sodium polyacrylate to prepare alkali gel with a certain alkali agent dosage; and S2, weighing the fabric, fixing the fabric on a printing table plate, and performing single-side scraping printing on the prepared alkali gel by using a printing screen to form a large square pattern. Then, the fabric with the gel scraped is clamped between two layers of cotton cloth, and the two layers of cotton cloth are put into a hot-pressing plate machine to be degummed according to the set temperature and time; and repeatedly washing with cold running water after degumming until the slurry is cleaned and the washing water is neutral. And then drying in a 95 DEG C oven for 2 hours, balancing overnight, weighing and storing, and repeating the operation for 3 times to finish degumming. A relatively stable alkali liquor environment can be formed on the surface of the fabric through the alkali gel, so that the alkali agent and the sericin are fully contacted and reacted, and the degumming effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of printing and dyeing technology, in particular to an alkali gel degumming method for real silk gauze fabric. Background Art

[0002] Silk gauze fabric is a gauze with mulberry silk as warp and weft, also known as plain gauze. Silk gauze is made of 100% mulberry silk, which is a natural protein fiber with excellent moisture absorption, air permeability and glossiness. The main component of silk gauze is protein fiber, and alkali agents have a certain dissolving and swelling effect on it. By taking advantage of the characteristics of alkali agents on silk gauze fibers, the alkali agents are printed on the silk gauze fabric by printing, so that the fibers in the alkali-printed parts undergo physical and chemical changes, thereby forming different colors, patterns or special texture effects on the fabric.

[0003] In the traditional alkali degumming process, improper control of parameters such as alkali solution concentration, temperature and processing time can easily cause serious damage to silk gauze fabrics, affecting the fabric's feel, strength, gloss and other properties; and the silk gauze fabric degumming process may require the use of complex equipment and chemicals, with cumbersome operating procedures and high costs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a method for alkali gel degumming of silk gauze fabric, which solves the problems that the prior alkaline degumming method is easy to cause damage to the silk gauze fabric and has a high cost.

[0005] To achieve the above object, the present invention is implemented by the following technical scheme: a method for alkali gel degumming of silk gauze fabric, comprising the following steps: S1. Preparation of alkaline water Weigh a certain amount of slaked lime and dissolve it in distilled water at room temperature. Add 0.2g slaked lime to every 100mL of distilled water. Stir thoroughly until dissolved and let stand overnight. When insoluble lime precipitates appear at the bottom of the solution, take the supernatant to obtain saturated lime water. S2. Preparation of alkali paste Weigh 5% urea and 20% wheat starch by weight, dissolve them in lime water with a fixed mass fraction, heat them to near boiling and cook for 5 minutes, stirring them continuously, and prepare a uniform, non-granular, translucent paste-like alkali steam printing paste for use; S3. Alkaline Gel Preparation Weigh 4g of food-grade sodium polyacrylate, add a small amount uniformly to 100mL of sodium hydroxide solution with a fixed mass fraction, stir continuously and fully with an electric stirrer during the addition process to make the sodium polyacrylate stir evenly, let it stand overnight to fully blend, and prepare an alkali gel with a certain amount of alkali agent; S4. Alkaline gel degumming The fabric was weighed, recorded and fixed on the printing plate, and a printing screen with a 150-mesh flat mesh and a single-filament diameter of 106 μm was selected. A large square pattern with an area of ​​10 cm × 10 cm was printed on one side using the configured alkali gel; the fabric with the gel scraped was placed between two layers of cotton cloth, placed in a hot pressing flatbed machine, and degummed according to the set temperature and time; after degumming, the fabric was repeatedly washed with cold running water until the slurry was removed and the washing water was neutral; the washed fabric was dried in a 95°C oven for 2 h, weighed and stored after balancing overnight, and repeated 3 times. The degumming was completed after repeating the above operation 3 times.

[0006] Preferably, the step S3 can also be degummed by alkali steaming, and the specific process is as follows: The fabric was weighed, recorded and fixed on the printing platen, a printing screen with a 150-mesh flat mesh and a single-filament diameter of 106 μm was selected, and a large square pattern with an area of ​​10 cm × 10 cm was scraped on one side using the configured alkali-steamed printing paste; the printed fabric with the alkali paste was placed in a high-temperature steam oven, treated at a certain temperature and time, and then washed with 55°C warm water, and then repeatedly washed with cold running water until the slurry was removed and the washing liquid was neutral, and finally the fabric was dried in a 95°C oven for 2 hours, weighed and stored after balancing overnight, and the above operation was repeated 3 times to complete the degumming.

[0007] Preferably, the step S4 can also be degummed by alkali boiling, and the specific process is as follows: Cut the silk gauze fabric into a size of 20cm×20cm, weigh and record it with an electronic balance, then fold it into 4 layers and neatly clamp it between 2 5cm×5cm high-strength resin plywoods, and fix it with a G-shaped clamp applying a constant clamping force. Immerse the clamped fabric in alkaline water at a bath ratio of 1:80 for alkaline boiling and degumming. After treating it at a specific temperature for a period of time, wash it repeatedly with distilled water until the acidity and alkalinity of the washing solution are neutral; finally, dry the degummed fabric in a 95℃ oven for 2h, weigh it and store it after balancing overnight, and repeat the above operation 3 times to complete the degumming.

[0008] Preferably, the alkali degumming temperature is 60-100° C., and the treatment time is 15-150 min.

[0009] Preferably, the alkali steam degumming treatment temperature is 60-100° C., and the treatment time is 15-150 min.

[0010] Preferably, the treatment temperature of the alkali gel degumming is 40 to 130° C., and the treatment time is 10 to 150 seconds.

[0011] The present invention provides a method for alkali gel degumming of silk gauze fabric, which has the following beneficial effects: 1. The present invention can make the fabric be uniformly exposed to alkali solution during the alkali boiling process through alkali boiling degumming, which is beneficial to improve the uniformity and thoroughness of degumming. After being treated at a specific temperature for a period of time, it is repeatedly washed with distilled water until the acidity and alkalinity of the washing solution are neutral, which can effectively remove impurities such as sericin on the fabric and achieve a better degumming effect. In the alkali steam degumming process, the alkali agent can fully react with the sericin under a high temperature and high humidity environment, so that the sericin is dissolved and removed, thereby achieving a better degumming effect. In addition, the alkali gel has certain viscosity and water retention, and can form a relatively stable alkali solution environment on the surface of the fabric, so that the alkali agent and the sericin are fully in contact and react, thereby improving the degumming effect. The operating steps of each method are relatively clear and simple, which can ensure the stability of the degumming effect.

[0012] 2. The alkali raw materials used in the degumming process of the present invention are all relatively low-cost materials with a wide range of sources and less pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the effect of the hot pressing temperature on the degumming rate of silk gauze of the present invention; Figure 2 It is a schematic diagram of the effect of the hot pressing time on the degumming rate of silk gauze of the present invention; Figure 3 Figure 2 is a graph showing the surface morphology of silk gauze under different heat pressing times of the present invention, wherein Figure 3 (a) is the hot pressing time of 10s, Figure 3 (b) hot pressing time 50s, Figure 3 (c) hot pressing time 90s; Figure 4 Figure 1 is a surface morphology diagram of silk gauze monofilament and its fabric under different alkali degumming processes of the present invention, wherein Figure 4 (a) is not degummed, Figure 4 (b) Alkali degumming, Figure 4 (c) alkali steam degumming, Figure 4 (d) alkaline gel degumming; Figure 5 It is the infrared spectra of silk gauze under different alkali degumming processes of the present invention. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0015] The embodiment of the present invention provides a method for alkali gel degumming of silk gauze fabric, comprising the following steps: S1. Preparation of alkaline water Weigh a certain mass of slaked lime and dissolve it in distilled water at room temperature. Add 0.2g slaked lime to every 100mL of distilled water. Stir thoroughly until dissolved and let stand overnight. When insoluble lime precipitates appear at the bottom of the solution, take the supernatant to obtain saturated lime water. S2. Alkali degumming Cut the silk gauze fabric into pieces of 20cm×20cm in size, weigh and record them with an electronic balance, then fold them into 4 layers and neatly clamp them in 2 pieces of 5cm×5cm high-strength resin plywood, and fix them with a G-shaped clamp to apply a constant clamping force, immerse the clamped fabric in alkaline water at a bath ratio of 1:80 for alkali boiling degumming, treat them at ambient temperatures of 60℃, 70℃, 80℃, 85℃, 90℃, 95℃, and 100℃ for 15min, 30min, 45min, 60min, 75min, 90min, 120min, and 150min, and wash them repeatedly with distilled water until the acidity and alkalinity of the washing solution are neutral; finally, dry the degummed fabric in a 95℃ oven for 2h, weigh and store it after balancing overnight, and repeat the above operation 3 times to complete the degumming. Example

[0016] The embodiment of the present invention provides a method for alkali gel degumming of silk gauze fabric, comprising the following steps: S1. Preparation of alkali paste Weigh 5% urea and 20% wheat starch by weight, dissolve them in lime water with a fixed mass fraction, heat them to near boiling and cook for 5 minutes, stirring them continuously, and prepare a uniform, non-granular, translucent paste-like alkali steam printing paste for use; S2. Alkali steam degumming The fabric was weighed, recorded and fixed on the printing platen, a printing screen with a 150-mesh flat mesh and a single-filament diameter of 106 μm was selected, and a large square pattern with an area of ​​10 cm×10 cm was scraped on one side using the configured alkali-steamed printing paste; the printed fabric with the alkali paste scraped was placed in a high-temperature steam oven, and treated at ambient temperatures of 60°C, 70°C, 80°C, 85°C, 90°C, 95°C and 100°C for 15 min, 30 min, 45 min, 60 min, 75 min, 90 min, 120 min and 150 min respectively, then washed with warm water at 55°C, and then repeatedly washed with cold running water until the slurry was removed and the washing liquid was neutral, and finally the fabric was dried in a 95°C oven for 2 h, weighed and stored after balancing overnight, and the degumming was completed after repeating the above operation 3 times. Example

[0017] The embodiment of the present invention provides a method for alkali gel degumming of silk gauze fabric, comprising the following steps: S1. Alkaline gel preparation Weigh 4g of food-grade sodium polyacrylate, add a small amount uniformly to 100mL of sodium hydroxide solution with a fixed mass fraction, stir continuously and fully with an electric stirrer during the addition process to make the sodium polyacrylate stir evenly, let it stand overnight to fully blend, and prepare an alkali gel with a certain amount of alkali agent; S2. Alkaline gel degumming The fabric was weighed, recorded and fixed on the printing plate, and a printing screen with a 150-mesh flat mesh and a monofilament diameter of 106 μm was selected. A large square pattern with an area of ​​10 cm×10 cm was scraped on one side using the configured alkali gel; the fabric with the gel scraped was placed between two layers of cotton cloth, and placed in a hot pressing flatbed machine, and treated at an ambient temperature of 40°C, 50°C, 60°C, 70°C, 80°C, 85°C, 90°C, 95°C, 100°C, 110°C, 120°C, and 130°C for 10s, 30s, 50s, 70s, 90s, 110s, 130s, and 150s, respectively, for degumming; the degummed fabric was repeatedly washed with cold running water until the slurry was removed and the washing water was neutral; the washed fabric was dried in a 95°C oven for 2h, weighed and stored after balancing overnight, and repeated 3 times. The degumming was completed after repeating the above operation 3 times. The effects of different hot pressing temperatures on the degumming rate of silk yarn in Examples 1 to 3 are as follows: Figure 1 As shown in Table 1 below: Table 1 Effect of hot pressing temperature on degumming rate of silk yarn Hot pressing temperature / °C Alkali boiling degumming rate / % Alkali steam degumming rate / % Alkali gel degumming rate / % 40 \ \ 7.4±0.39 50 \ \ 11.88±0.68 60 20.28±0.24 2.82±2.11 16.56±0.26 70 24.54±0.11 3.01±1.17 23.65±0.39 80 27.12±0.35 6.21±1.46 23.96±0.64 85 31.47±0.16 10.61±2.62 23.98±0.32 90 34.01±0.38 12.88±1.31 22.5 ±0.26 95 38.35±0.52 18.79±1.05 22.13±0.45 100 42.14±0.85 25.15±0.26 21.77±0.53 110 \ \ 21.35±0.82 120 \ \ 21.25±0.88 130 \ \ 20.62±0.68 As shown in Table 1, the degumming rate increases with the increase of temperature, whether it is alkali boiling or alkali steaming degumming. In the process of alkali gel degumming, when the hot pressing temperature exceeds 90°C, the degumming rate of silk gauze decreases, which is quite different from the degumming methods of alkali boiling and alkali steaming. Alkali steaming needs to rely on water molecules in the steam to slowly release the alkali agent in the paste to act on the sericin. When the amount of steam is limited before reaching the boiling point of water, the degumming rate rises slowly and never exceeds 20%. Under the condition of alkali steaming at a temperature of 100°C, the degumming rate is maintained at about 25%. During alkali boiling degumming, the sericin is fully in contact with the alkali aqueous solution, which can better surround the sericin on the surface of the silk for degumming, which makes the alkali boiling degumming rapid and effective. Under the condition of alkali boiling temperature of 80°C, the degumming rate has reached about 27%, and the sericin removal rate is significantly higher than that of alkali steaming. In the process of alkali steaming degumming, due to the slow evaporation rate of water in the alkali gel at low temperature, the degumming of the fabric by the alkali agent is continuous and stable. As the temperature continues to rise, the water in the gel evaporates faster. When the gel is completely dehydrated and dried, silk degumming is no longer carried out. Therefore, in the process of alkali gel degumming, it is necessary to avoid excessively high temperatures that affect the evaporation of water in the gel.

[0018] The effects of different hot pressing treatment times on the degumming rate of silk gauze in Examples 1 to 3 are as follows: Figure 2 As shown in Table 2 below: Table 2 Effect of hot pressing time on degumming rate of silk gauze Hot pressing time Alkaline water degumming rate / % Alkali paste degumming rate / % Alkali gel degumming rate / % 10s \ \ 14.79±0.82 30s \ \ 22.81±0.26 50s \ \ 26.88±0.26 70s \ \ 25.52±0.39 90s \ \ 22.92±0.39 110s \ \ 21.46±0.15 130s \ \ 21.15±0.97 150s \ \ 21.25±0.51 15min 25.34±0.56 16.54±2.60 \ 30min 27.12±0.35 20.00±0.94 \ 45min 31.24±0.81 21.43±0.51 \ 60min 35.14±0.62 22.53±1.20 \ 75min 39.32±1.17 23.72±0.89 \ 90min 43.16±0.62 24.41±0.52 \ 120min 52.37±0.54 25.27±0.54 \ 150min 60.31±0.78 25.54±1.31 \ As shown in Table 2, the degumming rate of alkali gel gradually increased from 14.79% at 10s of hot pressing to 26.88% at 50s of hot pressing. After that, with the increase of hot pressing time, the degumming rate of silk gauze continued to decrease and maintained at about 21%. This degumming rate first rose to a certain maximum point with time, and then decreased, which was quite different from the degumming of alkali boiling and alkali steaming. In the process of alkali boiling degumming, the degumming reached 25.34% after 15min of alkali boiling. When the time increased to 30min, the degumming rate reached 27.12%, and the degumming was complete. When the time continued to increase to 2 hours, the weight of the fabric decreased by more than 50%, and the silk began to be destroyed. During the alkali steaming degumming, the degumming rate was stable at about 25% from 16.54% at 15min to 2 hours of alkali steaming. Although the degumming rate showed a slow growth trend with time, there was no decrease in the degumming rate, which was due to the change of moisture in the alkali gel during the degumming process.

[0019] During the local printing process, the alkali gel provides the three necessary conditions for silk degumming: alkali, water and heat. When degumming begins, the three conditions are met at the same time, and the sericin swells and begins to separate from the silk fibroin. At this time, the heating degumming is stopped, and the sericin is easily washed away by the washing water, showing a continuous increase in the degumming rate. However, as time goes by, the water content in the alkali gel gradually decreases, and the swollen sericin begins to slowly dry and shrink, and re-adhere to the silk fibroin, which makes the degumming rate show a downward trend. Figure 3 As shown, Figure 3 The dosage of sodium hydroxide is 8g / L -1 , the surface morphology and fiber morphology of silk gauze fabric under different degumming time conditions at hot pressing temperature of 80℃. Figure 3 (a) It can be seen that when the hot press degumming is performed for 10 seconds, the silk surface is partially degummed, but the silk yarn basically maintains the fiber bundle state; when the hot press degumming is performed for 50 seconds, the yarn fiber bundles become fluffy, and the silk surface is completely degummed, as shown in Figure 2. Figure 3 (b); However, as the degumming time continues to increase, the alkali gel loses water and dries, and the detached sericin also re-adheres to the silk surface, as shown in Fig. Figure 3 (c) This makes the degumming rate of silk gauze show a decreasing trend over time. Therefore, in the process of alkali gel degumming, full consideration should be given to degumming and cleaning before the gel is completely dried to avoid the re-adhesion of sericin.

[0020] In order to further observe the difference in the degumming effect of silk gauze surface under different alkali degumming processes and whether it has any effect on the fiber structure, a comparative analysis was carried out using SEM scanning electron microscopy and infrared spectrometer.

[0021] Experiment 1: Comparison of surface morphology of silk gauze after degumming with different alkali agents The surface morphology and structure of silk gauze under different process conditions were further observed using a SEM scanning electron microscope. Figure 4 As shown, Figure 4 (a) is undegummed silk gauze. It can be seen that the surface of the original silk fiber is rough, the sericin tightly bonds multiple silk fibers together, and there are large gaps between the warp and weft yarns of the silk gauze; Figure 4 (b) is the surface morphology of silk gauze after high temperature alkali boiling treatment (complete degumming conditions of saturated lime water, bath ratio 1:80, temperature 80°C, time 30 min); Figure 4 (c) shows the surface morphology of silk gauze treated with slaked lime alkaline paste and steam (saturated slaked lime water alkaline paste, steam temperature 100°C, steam time 120 min). Figure 4 (d) Alkaline gel degumming treatment (sodium hydroxide dosage 8g / L -1 , hot pressing temperature 80℃, hot pressing time 50s). It can be seen that there is no obvious difference in the surface morphology of silk gauze under the three degumming methods, the silk fibers have achieved good degumming, the silk fibroin presents fine longitudinal stripes due to the fibril structure, the fiber surface is smooth without sericin attachment, and the fabric structure is fluffy.

[0022] Experiment 2: Infrared comparison of silk gauze after degumming with different alkali agents The differences in silk transmittance and absorption peaks from different degumming processes are mainly due to the effect of the degumming process on the molecular structure of silk. The Silk-I crystal structure is a metastable structure formed by the accumulation of silk protein segments in α-type molecular conformation. Silk-I (α-helix) can be transformed into Silk-II (β-fold) after being treated with moisture, heat, stress, etc. The degumming rates obtained by the three degumming methods under different process conditions are slightly different, such as Figure 5 As shown, Figure 5 (a) is undegummed, (b) is degummed by alkali boiling, (c) is degummed by alkali steaming, and (d) is degummed by alkali gelling. Figure 5 It can be seen that the three samples have a higher -1 The absorption peaks corresponding to the stretching vibration of N—H bonds appear at 1615, 1509, and 1221 cm -1The absorption peaks of stretching vibration of amide I, II, and III in the β-folded structure all appeared at the same time. Compared with the four samples, there was no obvious shift in the absorption peaks and no new peaks appeared or decreased, which shows that the three degumming processes had no obvious effect on the main chemical structure of the silk gauze fabric and did not produce new molecular structures or new functional groups. Compared with the undegummed sample (a), the samples with the three degumming methods showed a decrease in the absorption peaks at 1615cm -1 (Amide I zone), 1509 cm -1 (Amide II region), 1221 cm -1 The stretching vibration absorption peak intensity at (amide III region) increases with the increase of degumming rate. This is because in silk, sericin is mainly an amorphous structure, while silk fibroin has both an amorphous structure and a β-folded structure. With the increase of degumming rate, the amorphous Silk-I (α-helix) structure after degumming treatment is water-soluble and unstable, and decreases with the removal of sericin, while Silk-II (β-folded) is stable and insoluble in water, and its proportion increases accordingly.

[0023] The alkaline degumming treatment of silk gauze fabric was carried out by alkali boiling, alkali steaming and alkali gelation respectively, and the degumming mechanism and the surface morphology and infrared of the degummed silk gauze were compared, and the following conclusions were drawn: The alkaline degumming process of silk gauze fabric cannot be separated from the combined effects of alkali, water and heat. The study used the strong alkali effect of sodium hydroxide to neutralize the carboxyl groups on the sodium polyacrylate molecules, ionize to produce carboxylate anions, and sharply increase the viscosity to form alkaline gel. In the local degumming microsystem, the alkali gel meets the conditions of alkali, water and heat required for fine degumming of silk gauze, combines the dual effects of alkali boiling and alkali steaming, and can achieve rapid degumming within 50s at a hot pressing temperature of 80°C. The study compared the effects of the three degumming processes of alkali boiling, alkali steaming and alkali gel on the degumming effect of silk gauze under the conditions of hot pressing temperature and hot pressing time, and compared the surface morphology and infrared contrast of the silk gauze after degumming by the three processes. The results showed that there was no obvious difference in the surface morphology of silk gauze under the three degumming methods, the surface of silk fiber was smooth and there was no sericin adhesion, and the main chemical structure was not significantly affected. The alkaline gel process is used to achieve fine degumming of silk gauze, which is of great significance to expanding the artistic expression and application of traditional Chinese alkaline printing technology in modern silk degumming printing.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for alkali gel degumming of silk gauze fabric, characterized in that: The following steps are involved: S1. Preparation of alkaline water Weigh a certain amount of slaked lime and dissolve it in distilled water at room temperature. Add 0.2g slaked lime to every 100mL of distilled water. Stir thoroughly until dissolved and let stand overnight. When insoluble lime precipitates appear at the bottom of the solution, take the supernatant to obtain saturated lime water. S2. Preparation of alkali paste Weigh 5% urea and 20% wheat starch by weight, dissolve them in lime water with a fixed mass fraction, heat them to near boiling and cook for 5 minutes, stirring them continuously, and prepare a uniform, non-granular, translucent paste-like alkali steam printing paste for use; S3. Alkaline Gel Preparation Weigh 4g of food-grade sodium polyacrylate, add a small amount uniformly to 100mL of sodium hydroxide solution with a fixed mass fraction, stir continuously and fully with an electric stirrer during the addition process to make the sodium polyacrylate stir evenly, let it stand overnight to fully blend, and prepare an alkali gel with a certain amount of alkali agent; S4. Alkaline gel degumming The fabric was weighed, recorded and fixed on the printing plate, and a printing screen with a 150-mesh flat mesh and a single-filament diameter of 106 μm was selected. A large square pattern with an area of ​​10 cm × 10 cm was printed on one side using the configured alkali gel; the fabric with the gel scraped was placed between two layers of cotton cloth, placed in a hot pressing flatbed machine, and degummed according to the set temperature and time; after degumming, the fabric was repeatedly washed with cold running water until the slurry was removed and the washing water was neutral; the washed fabric was dried in a 95°C oven for 2 h, weighed and stored after balancing overnight, and repeated 3 times. The degumming was completed after repeating the above operation 3 times.

2. The method for alkali gel degumming of silk gauze fabric according to claim 1, characterized in that: The S4 step can also be degummed by alkali steaming, and the specific process is as follows: The fabric was weighed, recorded and fixed on the printing platen, a printing screen with a 150-mesh flat mesh and a single-filament diameter of 106 μm was selected, and a large square pattern with an area of ​​10 cm × 10 cm was scraped on one side using the configured alkali-steamed printing paste; the printed fabric with the alkali paste was placed in a high-temperature steam oven, treated at a certain temperature and time, and then washed with 55°C warm water, and then repeatedly washed with cold running water until the slurry was removed and the washing liquid was neutral, and finally the fabric was dried in a 95°C oven for 2 hours, weighed and stored after balancing overnight, and the above operation was repeated 3 times to complete the degumming.

3. The method for alkali gel degumming of silk gauze fabric according to claim 1, characterized in that: The S4 step can also be degummed by alkali boiling, and the specific process is as follows: Cut the silk gauze fabric into a size of 20cm×20cm, weigh and record it with an electronic balance, then fold it into 4 layers and neatly clamp it between 2 5cm×5cm high-strength resin plywoods, and fix it with a G-shaped clamp applying a constant clamping force. Immerse the clamped fabric in alkaline water at a bath ratio of 1:80 for alkaline boiling and degumming. After treating it at a specific temperature for a period of time, wash it repeatedly with distilled water until the acidity and alkalinity of the washing solution are neutral; finally, dry the degummed fabric in a 95℃ oven for 2h, weigh it and store it after balancing overnight, and repeat the above operation 3 times to complete the degumming.

4. The method for alkali gel degumming of silk gauze fabric according to claim 1, characterized in that: The alkali degumming temperature is 60-100° C., and the processing time is 15-150 minutes.

5. The method for alkali gel degumming of silk gauze fabric according to claim 1, characterized in that: The alkali steam degumming treatment temperature is 60-100° C., and the treatment time is 15-150 minutes.

6. The method for alkali gel degumming of silk gauze fabric according to claim 1, characterized in that: The treatment temperature of the alkali gel degumming is 40 to 130° C., and the treatment time is 10 to 150 seconds.

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