Processing technology of machine-washable high-color-fastness real silk fabric

Abstract

The invention relates to the technical field of real silk fabric treatment, in particular to a processing technology of a machine-washable high-color-fastness real silk fabric. The process comprises the steps of fabric pretreatment, fabric dyeing, fabric bath color fixation, fabric soaping neutralization, drying by a setting machine, anti-ash-damage finishing and washing and ironing. In the process, particularly fabric bath color fixation: a color fixation solution is added into a beam cylinder, the temperature of the color fixation solution is increased to 55-65 DEG C firstly, then an auxiliary color fixing agent is added into the beam cylinder, the concentration of the auxiliary color fixing agent is 0.5-1 g / L, heat preservation is conducted for 20-40 min, and then the solution is directly discharged without cooling. The production process disclosed by the invention has the characteristics of simplicity, stability and high efficiency; after the mulberry silk fabric is processed through the processing technology, the dye fastness can be greatly improved, the problems that the mulberry silk fabric is fuzzed and damaged by dust and is unstable in size in the follow-up taking and machine washing process are solved, the machine washable standard is really achieved, the service life of high-grade mulberry silk is prolonged, and the application field of the mulberry silk in spinning is widened.

Description

Technical Field

[0001] The invention relates to the technical field of silk fabric processing, and in particular to a processing technology of machine-washable silk fabric with high color fastness. Background Art

[0002] Silk is comfortable, breathable, and skin-friendly, and is deeply loved by consumers. However, silk is a protein fiber, which is relatively fragile and has poor twist resistance. It is easy to fuzz and wrinkle during wearing. Washing will cause short hairs on silk fabrics, forming diffuse reflection, reducing the gloss of the fabric. In addition, due to the dyeing process, the dye and silk fabric have low binding force, and the color fades seriously after washing.

[0003] At present, according to the "2018 Consumer Washing Behavior Survey Report", 71.76% of consumers do not use washing machines to wash silk due to concerns about wear and tear on silk products. Dry cleaning is generally used to clean high-end silk fabrics. Even so, it is difficult to avoid wear and fuzzing during dry cleaning, and the cost of dry cleaning is high. Dry cleaning agents are not environmentally friendly and have the risk of carcinogenesis. Machine washable dyeing and finishing can reduce the damage to fibers during wearing and washing, greatly improve the color fastness of dyes, and after 30 to 50 washing and drying at home, the fabric can still maintain good color and dimensional stability, and at the same time maintain a good feel. Therefore, the machine washable dyeing and finishing process of silk improves the problem of difficult care of silk and meets the needs of the current market.

[0004] At present, there are still few studies on the industrialization of machine washable silk. Most researchers only focus on fiber protection for machine washable silk, but do not consider the binding force between dye and silk, which leads to color change and aging of silk due to dye falling off during the silk washing process. Some researchers have taken both into consideration, but found in the process of industrial application that the processing time of machine washable processing is long and the process is unstable, which can easily cause order delivery and quality problems.

[0005] The Chinese patent with publication number CN115897233A discloses a method for treating silk fabrics to prevent ash damage. The method comprises soaking the silk fabric in an anti-ash agent treatment solution, and then performing an alkali treatment. In the alkali treatment step, the silk fabric is first kept at 25-35°C, then heated to 60-90°C, and then washed and shaped and dried. Although no ash damage occurs after 10 machine washings, its washing resistance does not achieve excellent results. At the same time, due to the influence of the textile finishing process, the anti-fibrillating agent is easily hydrolyzed, which does not meet the requirements of industrial application.

[0006] The Chinese patented fiber with publication number CN 117385636 A has the functionality of machine washable anti-fibrillation, so that after the treated finished fabric or garment is washed and dried 20 to 50 times in a washing machine, there is almost no gray damage and white marks on the surface. However, the solution provided by this patent requires specially customized anti-gray damage additives, which is costly. At the same time, the additive application process adopts cold padding and roller dyeing processes. The cold padding process will result in the order timeliness cannot be guaranteed. On the other hand, the cold padding and roller dyeing processes will cause the dyed fabrics to fade and then be dyed during the padding and stacking process, resulting in the problem of color difference between the edges and the head and tail of the fabric, and the process stability is not good.

[0007] Therefore, a simple, efficient and stable processing technology for machine-washable silk fabrics is currently needed. Summary of the invention

[0008] The purpose of the present invention is to provide a machine washable high color fastness silk fabric processing technology to address the problem that the current silk fabric or silk-containing fabric becomes gray and fades after washing, which reduces the fabric quality. The silk fabric treated by this process can ensure that the silk fabric still maintains good gloss and feel after 30 to 50 washings.

[0009] Specifically, the present invention adopts the following technical solutions: A processing technology for machine-washable high-color-fastness silk fabric, the process specifically comprising the following steps: S1. Fabric pretreatment: put the fabric into the warp cylinder, then add the pretreatment liquid prepared by water and pretreatment additives, heat it to 50-70℃, soak the silk fabric for 30-60min, then cool it down and drain the liquid; S2, fabric dyeing: add dye solution into the warp cylinder, the dye solution includes water, dye and acid release agent, the concentration of acid release agent is 0.5~2g / L, heat the dye solution to 80~90℃, keep the temperature for 40~60min, then cool down and drain; S3. Fixing in fabric bath: Add fixing liquid to the warp cylinder, first heat the fixing liquid to 55-65℃, then add auxiliary fixing agent, the concentration of the auxiliary fixing agent is 0.5~1g / L, keep warm for 20-40min, then drain directly without cooling; S4. Fabric soaping and neutralization: add soaping liquid into the warp cylinder, heat the soaping liquid to 55-65℃, keep warm for 20-40min, then drain the liquid, add acid washing liquid immediately after draining, and wash the residual soaping agent on the fabric; S5, drying in a setting machine: after unwinding the fabric in step S4, drying it continuously in a setting machine; S6, anti-dust damage finishing: the fabric dried in step S5 is dipped into the anti-dust damage finishing agent on a setting machine, and then pre-dried and baked continuously; S7, washing and drying: the fabric treated with anti-ash damage in step S6 is washed in an open-width continuous washing machine to remove free chemicals, and then drum-dried.

[0010] In the above process of the present invention, since the silk fabric used for processing is different from the traditional one, the specific parameters of the processing process need to be specially designed. In addition, the present invention is to solve the problem that the silk fabric cannot be machine washed, which means that the fiber cannot be damaged during the processing. To this end, the inventor uses a new color fixing agent and an auxiliary color fixing agent to ensure that the fibers of the silk fabric can maintain a good state.

[0011] Generally, for ordinary fibers, the most important thing in the color fixation treatment is to prevent the color from changing too much after the color fixation is completed. Here, the inventor needs to consider avoiding damage to the fiber due to too long a treatment time. Therefore, the temperature and time of the color fixation treatment are a very difficult issue to grasp. Here, the inventor has specially designed a process for silk fabrics to ensure the dyeing effect and quality of the silk fabrics.

[0012] At present, if conventional silk fabrics are machine washed, they will appear very old and feel hard after washing. There are two main reasons. One is that the dye fastness is not high, which will cause the dye to fall off, and the originally dark color will turn light. In order to solve this problem, the inventor needs to use a targeted special fixing agent to enable the fabric to achieve high fastness. The second reason is that silk itself is very fragile, and a lot of short hair will appear after washing. The hair will look very old. The high-end mirror reflection itself becomes diffuse reflection and light color after washing. At the same time, because there is hair on the surface, it is not easy for fibers to slide, resulting in a hard feel. For this reason, the inventor has carried out anti-dust damage treatment on the fabric to solve the problem.

[0013] Among the above-mentioned treatment processes of the present invention, the anti-ash damage finishing is a brand-new process designed by the inventor for silk fabrics, which effectively solves the problem of easy fuzzing of fabrics.

[0014] Preferably, in step S1, the bath ratio of fabric pretreatment is 1:20-40, the pretreatment auxiliary agent is a detergent, the concentration of the pretreatment auxiliary agent in the pretreatment solution is 0.5-1.5 g / L, and the heating rate is 2°C / min.

[0015] Preferably, in step S2, the bath ratio of dyeing is 1:20-40, the heating rate is 1-3°C / min, and the dye is one or more of Yellow5G, YellowR, BrilliantRed3G, Orange4R, RedB, Red2B, RedWF, Blue3R, Blue3G, NavyM, and BlackM.

[0016] Preferably, in step S3, the fixing agent is Famfix FA, and the amount of the fixing agent is half of the amount of the dye.

[0017] Preferably, in step S3, the bath ratio is 1:20-40; and the auxiliary color fixing agent is 36 degrees Baume liquid caustic soda.

[0018] Preferably, in step S4, the bath ratio is 1:20-40, the soaping agent concentration is 0.5-2 g / L, and the heating rate is 1-3°C / min.

[0019] Preferably, in step S4, the pickling solution is water and acetic acid, the amount of acetic acid is 2-6 g / L, and then pickling is performed until the solution is neutralized to a pH of 4-6.

[0020] Preferably, in step S5, the temperature of the setting machine is 130° C. and the drying time is 40 seconds.

[0021] Preferably, in step S6, the anti-ash damage finishing agent comprises urea resin and urea resin catalyst, or epoxy resin and epoxy resin catalyst; The dosage of urea resin is 60~100g / L, and the dosage of urea resin catalyst is 15~25g / L; The dosage of epoxy resin is 100~150g / L, and the dosage of epoxy resin catalyst is 5g / L~10g / L; The urea resin is one or more of dimethylol dihydroxy ethylene urea, etherified dimethylol dihydroxy ethylene urea, and 1,3-dimethyl-4,5-dihydroxyethylene urea; Epoxy resins include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, and propylene glycol triglycidyl ether; The urea resin catalyst is MaCl, and the epoxy resin catalyst is one or more of NaOH, NaBr, NaCNS, and Nal.

[0022] Preferably, in step S6, the pre-baking temperature is 110° C., and the pre-baking time is 40 seconds; the baking temperature is 150° C., and the baking time is 5 to 10 minutes.

[0023] Compared with the prior art, the present invention has the following beneficial effects: The production process of the present invention is simple, stable and efficient; After the mulberry silk fabric is treated by the processing technology of the present invention, the dye fastness can be greatly improved, the problem of fuzzing, dust damage and dimensional instability of the mulberry silk fabric during subsequent wearing and machine washing is solved, the machine washable standard is truly achieved, the service life of high-grade mulberry silk is extended, and the application field of mulberry silk in textile is expanded. DETAILED DESCRIPTION

[0024] It should be understood that the following description is not intended to limit the embodiments to one preferred embodiment. On the contrary, it is intended to cover alternatives, modifications and equivalents that may be included within the spirit and scope of the embodiments defined by the appended claims.

[0025] Our company has developed a processing technology for machine washable high color fastness silk fabrics, which specifically includes the following steps: S1. Fabric pretreatment: put the fabric into the warp cylinder, then add the pretreatment liquid prepared by water and pretreatment auxiliary agent, heat it to 50~70℃, soak the silk fabric for 30~60min, then cool down and drain the liquid; the bath ratio of fabric pretreatment is 1:20~40, the pretreatment auxiliary agent is detergent, the concentration of pretreatment auxiliary agent in the pretreatment liquid is 0.5~1.5g / L, and the heating rate is 2℃ / min.

[0026] S2. Fabric dyeing: add dye solution into the warp cylinder, the dye solution includes water, dye and acid release agent, the concentration of acid release agent is 0.5~2g / L, heat the dye solution to 80~90℃, keep warm for 40~60min, then cool down and drain; the bath ratio of dyeing is 1:20~40, the heating rate is 1~3℃ / min, and the dye is one or more of Yellow5G, YellowR, BrilliantRed3G, Orange4R, RedB, Red2B, RedWF, Blue3R, Blue3G, NavyM, BlackM.

[0027] S3, fabric color fixing in bath: add color fixing liquid to the warp cylinder, first heat the color fixing liquid to 55-65℃, then add auxiliary color fixing agent, the concentration of auxiliary color fixing agent is 0.5~1g / L, keep warm for 20-40min, then drain directly without cooling; the color fixing agent is Famfix FA, the amount of color fixing agent is half of the amount of dye. The bath ratio is 1:20~40; the auxiliary color fixing agent is 36 degrees Baume liquid alkali.

[0028] S4. Fabric soaping and neutralization: add soaping liquid to the warp cylinder, heat the soaping liquid to 55-65℃, keep warm for 20-40min, then drain the liquid, add acid washing liquid immediately after draining, and wash the residual soaping agent on the fabric; the bath ratio is 1:20~40, the soaping agent concentration is 0.5~2 g / L, and the heating rate is 1~3℃ / min. The acid washing liquid is water and acetic acid, the amount of acetic acid is 2~6 g / L, and then acid washing is performed until the solution is neutralized to a pH of 4~6.

[0029] S5, drying in a setting machine: after the fabric in step S4 is unwound, it is continuously dried in a setting machine; the setting machine temperature is 130° C. and the drying time is 40 seconds.

[0030] S6, anti-dust damage finishing: the dried fabric in step S5 is dipped into an anti-dust damage finishing agent on a setting machine, and continuously pre-baked and baked; the anti-dust damage finishing agent includes urea resin, epoxy resin, urea resin catalyst and epoxy resin catalyst; the amount of urea resin is 60-100g / L, the amount of epoxy resin is 100-150g / L, the amount of urea resin catalyst is 15-25g / L, and the amount of epoxy resin catalyst is 5g / L-10g / L; The urea resin is one or more of dimethylol dihydroxy ethylene urea, etherified dimethylol dihydroxy ethylene urea, and 1,3-dimethyl-4,5-dihydroxyethylene urea; Epoxy resins include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, and propylene glycol triglycidyl ether; The urea resin catalyst is MaCl, and the epoxy resin catalyst is one or more of NaOH, NaBr, NaCNS, and Nal.

[0031] The pre-baking temperature is 110°C and the pre-baking time is 40s; the baking temperature is 150°C and the baking time is 5~10min.

[0032] S7, washing and drying: the fabric treated with anti-ash damage in step S6 is washed in an open-width continuous washing machine to remove free chemicals, and then drum-dried.

[0033] Embodiment 1: A silk fabric is prepared by the above process: specifically 18 momme silk satin navy blue, as follows: (1) Fabric pretreatment: add water and pretreatment additives to the warp cylinder, heat it to 70°C, treat it for 30 minutes, then cool it down and drain it; the mass ratio of fabric to water in the warp cylinder (bath ratio) is 1:20, the pretreatment additive is a detergent with a concentration of 1.5g / L, and the heating rate is 2°C / min; (2) Fabric dyeing: Add dye solution into the warp cylinder. The dye solution includes water, dye and acid release agent. The dye concentration is 3% (owf) and the acid release agent concentration is 2g / L. Heat to 85°C, keep warm for 45 minutes, and then cool down and drain. The selected dye is NavyM (dye supplier: HUNTSMAN, variety: eriofast dyes), the mass ratio of fabric to water in the warp cylinder (bath ratio) is 1:20, and the heating rate is 2°C / min; (3) Fixing in fabric bath: Add fixing liquid into the warp cylinder. The fixing agent concentration is half of the dye dosage. First, heat the fixing liquid to 60°C. Then, add auxiliary fixing agent. The concentration of the auxiliary fixing agent is 1g / L. Keep the temperature for 20 minutes. Then, drain the liquid without cooling. The selected fixing agent is Famfix FA (auxiliary agent supplier: Shanghai Yayun), the auxiliary fixing agent is 36 degrees Baume liquid alkali, the solution pH = 11, (4) Fabric soaping and neutralization: add soaping liquid to the warp cylinder, heat it to 60℃, keep it warm for 20min, then drain the liquid, add water and acid immediately after draining, and wash the residual soaping agent on the fabric; the mass ratio of fabric to water in the warp cylinder (bath ratio) is 1:20, the concentration of soaping agent is 2 g / L, the heating rate is 3℃ / min, the amount of acetic acid is 2 g / L, and finally the solution is neutralized to pH = 4~6; (5) Drying in the setting machine: After the fabric is unrolled, it is continuously dried in the setting machine; the setting machine temperature is 130°C and the drying time is 40 seconds; (6) Anti-dust finishing: The dried fabric is dipped in the anti-dust finishing agent on the setting machine, and then pre-dried and baked continuously; The anti-gray finishing agent comprises : Ethylene glycol diglycidyl ether 150g / L; catalyst NaOH 5g / L; pre-baking temperature 110℃, pre-baking time 40s; baking temperature 150℃, baking time 5min; (7) Washing and drying: The fabrics treated with anti-ash treatment are washed in a flat-width continuous washing machine to remove free chemicals, and then rolled and dried.

[0034] Embodiment 2: A silk fabric is prepared by the above process: specifically, 18 momme silk satin red; (1) Fabric pretreatment: add water and pretreatment additives to the warp cylinder, heat it to 50°C, treat it for 60 minutes, then cool it down and drain it; the mass ratio of fabric to water in the warp cylinder (bath ratio) is 1:40, the pretreatment additive is 0.5g / L detergent, and the heating rate is 2°C / min; (2) Fabric dyeing: Add dye solution into the warp cylinder. The dye solution includes water, dye and acid release agent. The dye concentration is 3% (owf) and the acid release agent concentration is 0.5 g / L. Heat to 90 °C and keep warm for 60 min. Then cool down and drain. The selected dye is BrilliantRed3G (dye supplier: HUNTSMAN, variety: eriofast dyes), the mass ratio of fabric to water in the warp cylinder (bath ratio) is 1:40, and the heating rate is 2°C / min; (3) Fixing in fabric bath: Add fixing liquid into the warp cylinder. The fixing agent concentration is half of the dye dosage. First, heat the fixing liquid to 60°C. Then, add auxiliary fixing agent. The concentration of the auxiliary fixing agent is 1g / L. Keep the temperature for 20 minutes. Then, drain the liquid without cooling. (4) Fabric soaping and neutralization: Add soaping liquid to the warp cylinder, heat it to 60°C, keep it warm for 20 minutes, then drain the liquid, add water and acid immediately after draining, and wash the residual soaping agent on the fabric; the mass ratio of fabric to water in the warp cylinder (bath ratio) is 1:40, the concentration of soaping agent is 0.5 g / L, the heating rate is 3°C / min, the amount of acetic acid is 2 g / L, and finally the solution is neutralized to pH = 4~6; (5) Drying in the setting machine: After the fabric is unrolled, it is continuously dried in the setting machine; the setting machine temperature is 130°C and the drying time is 40 seconds; (6) Anti-dust finishing: The dried fabric is dipped in the anti-dust finishing agent on the setting machine, and then pre-dried and baked continuously; The anti-ash damage finishing agent comprises: Polyethylene glycol diglycidyl ether 150g / L; catalyst is NaB 10g / L; pre-baking temperature is 110℃, pre-baking time is 40s; baking temperature is 150℃, baking time is 5~10min; (7) Washing and drying: The fabrics treated with anti-ash treatment are washed in a flat-width continuous washing machine to remove free chemicals, and then rolled and dried.

[0035] Embodiment 3: The anti-ash finishing agent in step (6) of Example 1 was changed to propylene glycol triglycidyl ether, the epoxy resin was used in an amount of 100 g / L, and the catalyst was changed to NaCNS 10 g / L; the rest was the same as Example 1.

[0036] Embodiment 4: The anti-ash finishing agent in step (6) of Example 1 was changed to 60 g / L of dimethylol dihydroxy ethylene urea; the catalyst was changed to 15 g / L of MaCl; the rest was the same as in Example 1.

[0037] Embodiment 5: The anti-ash finishing agent in step (6) of Example 1 was changed to 80 g / L of etherified dimethylol dihydroxy ethylene urea; the catalyst was changed to 20 g / L of MaCl; the rest was the same as in Example 1.

[0038] Embodiment 6: The anti-ash damage finishing agent in step (6) of Example 1 was changed to 100 g / L 1,3-dimethyl-4,5-dihydroxyethylene urea; the catalyst was changed to 25 g / L MaCl; the rest was the same as Example 1.

[0039] Comparative Example 1: The silk fabric was tested for functionality using conventional technology, specifically 50 times of machine washing according to the industry standard for machine washability of silk. The test results are shown in the table below.

[0040] Note: 1) Hand feel grade: The best is “*****”.

[0041] 2) The washing method is the 4G water washing mode of a type A standard washing machine.

[0042] It is obvious to those skilled in the art that certain modifications, combinations and variations can be made based on the above teachings.

Claims

1. A processing technology for machine washable high color fastness silk fabric, characterized by: The process specifically comprises the following steps: S1. Fabric pretreatment: put the fabric into the warp cylinder, then add the pretreatment liquid prepared by water and pretreatment additives, heat it to 50-70℃, soak the silk fabric for 30-60min, then cool it down and drain the liquid; S2, fabric dyeing: add dye solution into the warp cylinder, the dye solution includes water, dye and acid release agent, the concentration of acid release agent is 0.5~2g / L, heat the dye solution to 80~90℃, keep the temperature for 40~60min, then cool down and drain; S3. Fixing in fabric bath: Add fixing liquid to the warp cylinder, first heat the fixing liquid to 55-65℃, then add auxiliary fixing agent, the concentration of the auxiliary fixing agent is 0.5~1g / L, keep warm for 20-40min, then drain directly without cooling; S4. Fabric soaping and neutralization: add soaping liquid into the warp cylinder, heat the soaping liquid to 55-65℃, keep warm for 20-40min, then drain the liquid, add acid washing liquid immediately after draining, and wash the residual soaping agent on the fabric; S5, drying in a setting machine: after unwinding the fabric in step S4, drying it continuously in a setting machine; S6, anti-dust damage finishing: the fabric dried in step S5 is dipped into the anti-dust damage finishing agent on a setting machine, and then pre-dried and baked continuously; S7, washing and drying: the fabric treated with anti-ash damage in step S6 is washed in an open-width continuous washing machine to remove free chemicals, and then drum-dried.

2. The processing technology according to claim 1, characterized in that: In the step S1, the bath ratio of the fabric pretreatment is 1:20-40, the pretreatment auxiliary agent is a detergent, the concentration of the pretreatment auxiliary agent in the pretreatment solution is 0.5-1.5 g / L, and the heating rate is 2°C / min.

3. The processing technology according to claim 1, characterized in that: In the step S2, the bath ratio of dyeing is 1:20-40, the heating rate is 1-3°C / min, and the dye is one or more of Yellow5G, YellowR, BrilliantRed3G, Orange4R, RedB, Red2B, RedWF, Blue3R, Blue3G, NavyM, and BlackM.

4. The processing technology according to claim 1, characterized in that: In step S3, the color fixing agent is Famfix FA, and the amount of the color fixing agent is half of the amount of the dye.

5. The processing technology according to claim 1, characterized in that: In the step S3, the bath ratio is 1:20-40; and the auxiliary color fixing agent is 36 degrees Baume liquid caustic soda.

6. The processing technology according to claim 1, characterized in that: In step S4, the bath ratio is 1:20-40, the soaping agent concentration is 0.5-2 g / L, and the heating rate is 1-3°C / min.

7. The processing technology according to claim 1, characterized in that: In step S4, the pickling solution is water and acetic acid, the amount of acetic acid is 2-6 g / L, and then pickling is performed until the solution is neutralized to a pH of 4-6.

8. The processing technology according to claim 1, characterized in that: In step S5, the temperature of the setting machine is 130° C. and the drying time is 40 seconds.

9. The processing technology according to claim 1, characterized in that: In the step S6, the anti-ash damage finishing agent includes urea resin and urea resin catalyst, or epoxy resin and epoxy resin catalyst; The dosage of urea resin is 60~100g / L, and the dosage of urea resin catalyst is 15~25g / L; The dosage of epoxy resin is 100~150g / L, and the dosage of epoxy resin catalyst is 5g / L~10g / L; The urea resin is one or more of dimethylol dihydroxy ethylene urea, etherified dimethylol dihydroxy ethylene urea, and 1,3-dimethyl-4,5-dihydroxyethylene urea; Epoxy resins include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, and propylene glycol triglycidyl ether; The urea resin catalyst is MaCl, and the epoxy resin catalyst is one or more of NaOH, NaBr, NaCNS, and Nal.

10. The processing technology according to claim 1, characterized in that: In step S6, the pre-baking temperature is 110° C. and the pre-baking time is 40 seconds; the baking temperature is 150° C. and the baking time is 5 to 10 minutes.

Images