Persimmon dyeing method for fabric and persimmon-dyed fabric

Abstract

The invention discloses a fabric persimmon dyeing method which comprises the following steps: (1) crushing immature green persimmons, filtering, and sealing and fermenting the obtained filtrate to obtain persimmon liquid; (2) diluting the persimmon liquid with water to obtain dye liquor; (3) immersing the to-be-dyed fabric into the dye liquor for dyeing treatment; (4) after the fabric is dyed, performing dehydration treatment until the moisture content of the fabric is 25-45%, preliminarily drying the dehydrated fabric at the temperature of 20-40 DEG C for 2-10 minutes, and then performing secondary drying at the temperature of 80-110 DEG C for 15-35 minutes; and (5) washing and drying. The fabric obtained by adopting the persimmon dyeing method for the fabric has good color fastness and better color rendering degree and contour fineness, and the duration of conventional natural airing for at least 10 days can be shortened to 4-5 days, so that the persimmon dyeing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fabric dyeing and processing, and particularly relates to a fabric persimmon dyeing method and persimmon dyed fabric. Background Art

[0002] The persimmon dyeing technique originated in China and can be traced back to the Tang Dynasty. The use of persimmon lacquer was mentioned in Yunxian Miscellaneous Notes, indicating that persimmon lacquer had been used for dyeing at least in the Tang Dynasty.

[0003] During the Ming and Qing Dynasties, persimmon lacquer was widely used to paint the surfaces of Hangzhou black folding fans, as well as to paint fish nets and rain gear, fill ship seams, and as a preservative for building materials.

[0004] Persimmon dyeing is more common in southern China, especially in Fujian and Guangdong, because persimmon trees are widely planted in these areas, and people have found that the juice of ripe persimmons has excellent dyeing ability. The dyes used in persimmon dyeing come from unripe persimmons, which are rich in natural tannins and pectins, which are the key ingredients of persimmon dyeing.

[0005] The persimmon dyeing process includes the steps of fruit selection, juicing, fermentation, dyeing, color fixation and drying. Since persimmon dye is a plant dye, the color rendering, outline fineness and color fastness of the fabric after dyeing are poor. And the tannic acid in the dye is oxidized under the action of light and oxygen to make the color darker and more firmly attached to the fiber. Therefore, the length of drying time after the fabric is dyed will directly affect the stability and depth of the color. It takes at least 10 days of drying and repeated dyeing 3-7 times to achieve a more ideal dyeing effect. Summary of the invention

[0006] The object of the present invention is to provide a method for persimmon dyeing of fabrics, which can improve the color fastness, color rendering and contour fineness of persimmon dyeing of fabrics and can reduce the drying time.

[0007] The above-mentioned purpose is achieved by the following technical solutions.

[0008] A first aspect of the present invention provides a method for persimmon dyeing of fabrics, comprising the following steps:

[0009] (1) crushing unripe green persimmons and filtering them, and sealing and fermenting the obtained filtrate to obtain persimmon juice;

[0010] (2) diluting the persimmon juice with water to obtain a dye solution;

[0011] (3) immersing the fabric to be dyed into the dye solution for dyeing;

[0012] (4) After the fabric is dyed, it is dehydrated until the moisture content of the fabric is 25% to 45%, and the dehydrated fabric is initially dried at a temperature of 20°C to 40°C for 2min to 10min, and then dried for a second time at a temperature of 80°C to 110°C for 15min to 35min;

[0013] (5) Wash and dry.

[0014] In some embodiments, in step (4), the temperature of the preliminary drying is 25°C to 35°C, preferably 28°C to 32°C.

[0015] In some embodiments, in step (4), the temperature of the second drying is 100°C to 110°C, preferably 108°C to 110°C.

[0016] In some embodiments, in step (4), the initial drying time is 3 min to 5 min; and / or,

[0017] The second drying time is 20 min to 30 min, preferably 23 min to 26 min; and / or,

[0018] In step (4), after the fabric is dyed, it is dehydrated until the moisture content of the fabric is 30% to 40%, preferably 33% to 37%.

[0019] In some embodiments, the fabric is silk fabric, cotton fabric, linen fabric or chemical fiber fabric; preferably silk fabric, cotton fabric or linen fabric, more preferably silk fabric.

[0020] In some embodiments, in step (1), the filtrate is sealed and fermented for at least one year at a fermentation temperature of 25° C. to 30° C.; and / or,

[0021] In step (3), before the dyeing treatment of the fabric to be dyed, the method further comprises:

[0022] According to the bath ratio of 1:55-65, the fabric to be dyed is soaked in an ethylene oxide polymer solution with a concentration of 0.3g / L-1g / L and a temperature of 75℃-85℃ for 15min-25min, washed with water at room temperature, dehydrated, and dried at 55℃-65℃ for 15min-25min.

[0023] In some embodiments, in step (2), the volume ratio of the persimmon juice to water is 1:1-5, preferably 1:1-3; and / or,

[0024] In step (3), the fabric to be dyed is mixed with the dye solution at a bath ratio of 1:15-25 and dyed for 15-25 minutes; and / or,

[0025] Before step (5), the method further comprises: repeating steps (3) and (4) 3 to 4 times; and / or,

[0026] In step (5), the drying method includes air-drying or drying at a temperature of 90 to 110°C.

[0027] In some embodiments, after step (4) and before step (5), the following steps are further included:

[0028] The dried fabric is naturally aired for 3 to 5 days; or, the fabric is immersed in a mordant or an alkali agent for treatment.

[0029] In some embodiments, the mordant is ferrous sulfate; preferably, the mordant is 0.2 g / L to 0.8 g / L ferrous sulfate, the bath ratio is 1:45 to 55, the treatment time is 8 min to 12 min, and the temperature is 55° C. to 65° C.; or,

[0030] The alkali agent is 2g / L to 8g / L sodium carbonate, the bath ratio is 1:45 to 55, the treatment time is 8min to 12min, and the temperature is room temperature.

[0031] A second aspect of the present invention provides a persimmon-dyed fabric prepared by the persimmon-dyed fabric method as described above.

[0032] In the present invention, it is found that in the process of persimmon dyeing of fabrics, by optimizing the processing technology, wherein the fabrics are dried at a specific temperature after persimmon dyeing is completed, wherein the fabrics are initially dried at a temperature of 20°C to 40°C, and then secondary dried at a temperature of 80°C to 110°C, which can achieve better color fastness, color rendering and contour fineness, and can shorten the conventional natural drying time of at least 10 days to 4 to 5 days, thereby improving the persimmon dyeing efficiency.

[0033] In addition, the inventors unexpectedly discovered that after the fabric is persimmon-dyed, it is dried at a specific temperature and then treated with a specific mordant or alkali agent, which can omit the natural drying treatment to deepen the color, further improve the efficiency of persimmon dyeing, break the khaki color of conventional persimmon-dyed silk fabrics, and give the fabric a straight and refreshing feel, achieving dyeing effects with different colors and feels. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 1 of the present invention.

[0035] Figure 2 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 2 of the present invention.

[0036] Figure 3 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 3 of the present invention.

[0037] Figure 4 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 4 of the present invention.

[0038] Figure 5 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 5 of the present invention.

[0039] Figure 6 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 6 of the present invention.

[0040] Figure 7 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 7 of the present invention.

[0041] Figure 8 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 8 of the present invention.

[0042] Fig. 9 It is a dyeing effect diagram of the persimmon-dyed fabric of Example 9 of the present invention.

[0043] Fig.10 It is a dyeing effect diagram of the persimmon-dyed fabric according to Example 10 of the present invention.

[0044] Fig.11 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 1 of the present invention.

[0045] Fig.12 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 2 of the present invention.

[0046] Fig.13 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 3 of the present invention.

[0047] Fig.14 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 4 of the present invention.

[0048] Fig.15 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 5 of the present invention.

[0049] Fig.16 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 6 of the present invention.

[0050] Fig.17 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 7 of the present invention.

[0051] Fig.18 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 8 of the present invention.

[0052] Fig.19 It is a dyeing effect diagram of the persimmon-dyed fabric of Comparative Example 9 of the present invention. DETAILED DESCRIPTION

[0053] In order to facilitate the understanding of the present invention, the present invention will be described more fully below. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0054] The experimental methods in the following examples without specifying specific conditions are usually carried out under conventional conditions or conditions recommended by the manufacturers. The various commonly used chemical reagents used in the examples are all commercially available products.

[0055] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0056] The present invention is further described below with reference to the embodiments.

[0057] Among them, ethylene oxide polymer was purchased from Jiangxi Luxi County Energy Saving New Materials Co., Ltd., ferrous sulfate was purchased from Tianjin Yongda Chemical Reagent Co., Ltd., and sodium carbonate was purchased from Hubei Shuanghuan Technology Co., Ltd.

[0058] Embodiment 1:

[0059] The fabric to be dyed in this embodiment is a silk fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0060] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0061] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0062] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0063] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0064] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0065] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0066] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0067] The persimmon dyeing result of the fabric is shown in the figure below. Figure 1 As shown, it can be seen that the plant pigment has good color rendering and good contour fineness, and the effect of deepening the color can be achieved without drying it in the sun for up to 10 days, which improves efficiency.

[0068] Embodiment 2:

[0069] The fabric to be dyed in this embodiment is a silk fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0070] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0071] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0072] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0073] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0074] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0075] Step (6): Repeat steps (4) to (5) above three times.

[0076] Step (7): the dried fabric is immersed in an aqueous solution of ferrous sulfate at a bath ratio of 1:50 for mordant dyeing, the concentration of ferrous sulfate is 0.5 g / L, heated to 60° C., and the mordant dyeing time is 10 minutes.

[0077] Step (8): Wash the mordanted fabric and dry it at 90° C. to obtain the dyed fabric.

[0078] The persimmon dyeing result of the fabric is shown in the figure below. Figure 2 As shown, it can be seen that the plant pigment has good color rendering and fine outline. After mordanting, it can achieve deeper color without long-term sun exposure, which improves efficiency. Breaking the conventional persimmon dyeing khaki color, the fabric appears black and gray, adding color richness, but the feel is relatively hard.

[0079] Embodiment 3:

[0080] The fabric to be dyed in this embodiment is a silk fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0081] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0082] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0083] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0084] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0085] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0086] Step (6): Repeat steps (4) to (5) above three times.

[0087] Step (7): Immerse the dried fabric in a sodium carbonate aqueous solution at a bath ratio of 1:50 and treat for 10 minutes at room temperature. The concentration of sodium carbonate is 5 g / L.

[0088] Step (8): Wash the treated fabric with water and then dry it naturally to obtain the dyed fabric.

[0089] The persimmon dyeing result of the fabric is shown in the figure below. Figure 3As shown, it can be seen that the plant pigment has good color rendering and good contour fineness. After sodium carbonate treatment, the color can be deepened without long-term sunlight exposure, the efficiency is improved, the conventional persimmon dyeing color is broken, a light brown-yellow color is obtained, and the hard feel can be improved.

[0090] Embodiment 4:

[0091] The fabric to be dyed in this embodiment is linen fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0092] Step (1): Fabric preparation (linen), prepare 1 meter long fabric.

[0093] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0094] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0095] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0096] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0097] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0098] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0099] The persimmon dyeing result of the fabric is shown in the figure below. Figure 4 As shown, it can be seen that the plant pigment has good color rendering and good contour fineness, and the effect of deepening the color can be achieved without drying it in the sun for up to 10 days, which improves efficiency.

[0100] Embodiment 5:

[0101] The fabric to be dyed in this embodiment is linen fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0102] Step (1): Fabric preparation (linen), prepare 1 meter long fabric.

[0103] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0104] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0105] Step (4): Weigh the persimmon liquid, dilute it according to the volume ratio of persimmon liquid:pure water=1:2 to obtain the dye solution, slowly pour the dye solution into a dyeing container with a certain bath ratio, and soak the fabric for 20 minutes.

[0106] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0107] Step (6): Repeat steps (4) to (5) above three times.

[0108] Step (7): the dried fabric is immersed in an aqueous solution of ferrous sulfate at a bath ratio of 1:50 for mordant dyeing, the concentration of ferrous sulfate is 0.5 g / L, heated to 60° C., and the mordant dyeing time is 10 minutes.

[0109] Step (8): Wash the mordanted fabric and dry it at 90° C. to obtain the dyed fabric.

[0110] The persimmon dyeing result of the fabric is shown in the figure below. Figure 5 As shown, it can be seen that the plant pigment has good color rendering and fine outline. After mordanting, it does not need to be exposed to the sun for a long time to achieve deeper color rendering, which improves efficiency. Breaking the conventional persimmon dyeing khaki color, the fabric appears black and gray, adding color richness.

[0111] Embodiment 6:

[0112] The fabric to be dyed in this embodiment is linen fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0113] Step (1): Fabric preparation (linen), prepare 1 meter long fabric.

[0114] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0115] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0116] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0117] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0118] Step (6): Repeat steps (4) to (5) above three times.

[0119] Step (7): Immerse the dried fabric in a sodium carbonate aqueous solution at a bath ratio of 1:50 and treat for 10 minutes at room temperature. The concentration of sodium carbonate is 5 g / L.

[0120] Step (8): Wash the treated fabric with water and then dry it naturally to obtain the dyed fabric.

[0121] The persimmon dyeing result of the fabric is shown in the figure below. Figure 6 As shown, it can be seen that the plant pigment has good color rendering and good contour fineness. After sodium carbonate treatment, the color can be deepened without long-term sunlight exposure, and the efficiency is improved; breaking the conventional persimmon dyeing color, a light brown-yellow color is obtained, and the hard feel can be improved.

[0122] Embodiment 7:

[0123] The fabric to be dyed in this embodiment is a cotton fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0124] Step (1): Fabric preparation (cotton), prepare 1 meter long fabric.

[0125] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0126] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0127] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0128] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0129] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0130] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0131] The persimmon dyeing result of the fabric is shown in the figure below. Figure 7 As shown, it can be seen that the plant pigment has good color rendering and good contour fineness, and the effect of deepening the color can be achieved without drying it in the sun for up to 10 days, which improves efficiency.

[0132] Embodiment 8:

[0133] The fabric to be dyed in this embodiment is a cotton fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0134] Step (1): Fabric preparation (cotton), prepare 1 meter long fabric.

[0135] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0136] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0137] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0138] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0139] Step (6): Repeat steps (4) to (5) above three times.

[0140] Step (7): the dried fabric is immersed in an aqueous solution of ferrous sulfate at a bath ratio of 1:50 for mordant dyeing, the concentration of ferrous sulfate is 0.5 g / L, heated to 60° C., and the mordant dyeing time is 10 minutes.

[0141] Step (8): Wash the mordanted fabric and dry it at 90° C. to obtain the dyed fabric.

[0142] The persimmon dyeing result of the fabric is shown in the figure below. Figure 8 As shown, it can be seen that the plant pigment has good color rendering and good outline fineness. After mordanting, no long-term sunlight exposure is required to achieve deeper color rendering, which improves efficiency. It breaks the conventional persimmon dyeing khaki color, and the fabric appears black and gray, adding color richness.

[0143] Embodiment 9:

[0144] The fabric to be dyed in this embodiment is a chemical fiber fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0145] Step (1): Fabric preparation (chemical fiber fabric), prepare 1 meter long fabric.

[0146] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0147] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0148] Step (4): Weigh the persimmon liquid, dilute it according to the volume ratio of persimmon liquid:pure water=1:2 to obtain dye solution, slowly pour the dye solution into the dyeing container according to the bath ratio of 1:20, and soak the fabric for 20 minutes.

[0149] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0150] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0151] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0152] The persimmon dyeing result of the fabric is shown in the figure below. Fig. 9 As shown, it can be seen that the plant pigment has good color rendering and fine outline, and the effect of deepening the color can be achieved without drying it in the sun for up to 10 days, which improves efficiency. However, the color rendering is weaker than that of other materials such as silk, cotton and linen.

[0153] Embodiment 10:

[0154] The fabric to be dyed in this embodiment is a chemical fiber fabric, and the fabric persimmon dyeing method provided in this embodiment comprises the following steps:

[0155] Step (1): Fabric preparation (chemical fiber fabric), prepare 1 meter long fabric.

[0156] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0157] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0158] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0159] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 110° C. for 25 min.

[0160] Step (6): Repeat steps (4) to (5) above three times.

[0161] Step (7): the dried fabric is immersed in an aqueous solution of ferrous sulfate at a bath ratio of 1:50 for mordant dyeing, the concentration of ferrous sulfate is 0.5 g / L, heated to 60° C., and the mordant dyeing time is 10 minutes.

[0162] Step (8): Wash the mordanted fabric and dry it at 90° C. to obtain the dyed fabric.

[0163] The persimmon dyeing result of the fabric is shown in the figure below. Fig.10As shown, it can be seen that the plant pigment has good color rendering and fine outline. After mordanting, no long-term sunlight exposure is required to achieve deeper color rendering, which improves efficiency. Breaking the conventional persimmon dyeing khaki color, the fabric appears black and gray, adding color richness, but the color depth is weaker than other materials such as silk, cotton and linen.

[0164] Comparative Example 1:

[0165] The fabric dyeing method provided in this comparative example is different from that in Example 1 in that the fabric is not dried after being dyed and dehydrated, but is directly dried naturally for 10 days. Specifically, the following steps are included:

[0166] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0167] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0168] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0169] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0170] Step (5): Take out the dyed fabric and dehydrate it through a dehydrator until the moisture content is 35%.

[0171] Step (6): Repeat steps (4) to (5) three times, and air-dry the dehydrated fabric for 10 days.

[0172] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0173] The persimmon dyeing result of the fabric is shown in the figure below. Fig.11 As shown, it takes up to 10 days of drying to achieve a deeper color, which is inefficient. Plant pigments have poor color rendering and good contour fineness.

[0174] Comparative Example 2:

[0175] The fabric dyeing method provided in this comparative example is different from that in Example 1 in that the fabric is only subjected to low-temperature (30° C.) drying after dyeing and dehydration. Specifically, the following steps are included:

[0176] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0177] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0178] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0179] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0180] Step (5): Take out the dyed fabric, and dehydrate it with a dehydrator until the moisture content is 35%, and then dry the dehydrated fabric at 30° C. until it is completely dry.

[0181] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0182] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0183] The persimmon dyeing result of the fabric is shown in the figure below. Fig.12 As shown, the low-temperature drying method improves the drying efficiency compared to conventional drying; it can also improve the hand feel, while natural drying is relatively hard; the color rendering of plant pigments is poor and the outline fineness is poor.

[0184] Comparative Example 3:

[0185] The fabric dyeing method provided in this comparative example is different from that in Example 4 in that the fabric is not dried after being dyed and dehydrated, but is directly dried naturally for 10 days. Specifically, the following steps are included:

[0186] Step (1): Fabric preparation (linen), prepare 1 meter long fabric.

[0187] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0188] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0189] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0190] Step (5): Take out the dyed fabric and dehydrate it through a dehydrator until the moisture content is 35%.

[0191] Step (6): Repeat steps (4) to (5) three times, and air-dry the dehydrated fabric for 10 days.

[0192] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0193] The persimmon dyeing result of the fabric is shown in the figure below. Fig.13 As shown, it takes up to 10 days of drying in the sun to achieve a darker color, which is inefficient, has poor color rendering of plant pigments, and poor outline fineness.

[0194] Comparative Example 4:

[0195] The fabric dyeing method provided in this comparative example is different from that in Example 4 in that the fabric is only subjected to low-temperature (30° C.) drying after dyeing and dehydration. Specifically, the following steps are included:

[0196] Step (1): Fabric preparation (linen), prepare 1 meter long fabric.

[0197] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0198] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0199] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0200] Step (5): Take out the dyed fabric, and dehydrate it with a dehydrator until the moisture content is 35%, and then dry the dehydrated fabric at 30° C. until it is completely dry.

[0201] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0202] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0203] The persimmon dyeing result of the fabric is shown in the figure below. Fig.14 As shown, the low-temperature drying method improves the drying efficiency compared to conventional drying; it can also improve the hand feel, while natural drying is relatively hard; the color rendering of plant pigments is poor and the outline fineness is poor.

[0204] Comparative Example 5:

[0205] The fabric dyeing method provided in this comparative example is different from that in Example 7 in that the fabric is not dried after being dyed and dehydrated, but is directly dried naturally for 10 days. Specifically, the following steps are included:

[0206] Step (1): Fabric preparation (cotton), prepare 1 meter long fabric.

[0207] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0208] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0209] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0210] Step (5): Take out the dyed fabric and dehydrate it through a dehydrator until the moisture content is 35%.

[0211] Step (6): Repeat steps (4) to (5) three times, and air-dry the dehydrated fabric for 10 days.

[0212] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0213] The persimmon dyeing result of the fabric is shown in the figure below. Fig.15As shown, it takes up to 10 days of drying in the sun to achieve a darker color, which is inefficient; the color rendering of plant pigments is poor and the outline fineness is average.

[0214] Comparative Example 6

[0215] The fabric dyeing method provided in this comparative example is different from that in Example 9 in that the fabric is not dried after being dyed and dehydrated, but is directly dried naturally for 10 days. Specifically, the following steps are included:

[0216] Step (1): Fabric preparation (chemical fiber fabric), prepare 1 meter long fabric.

[0217] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0218] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0219] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain a dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0220] Step (5): Take out the dyed fabric and dehydrate it through a dehydrator until the moisture content is 35%.

[0221] Step (6): Repeat steps (4) to (5) three times, and air-dry the dehydrated fabric for 10 days.

[0222] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0223] The persimmon dyeing result of the fabric is shown in the figure below. Fig.16 As shown, it takes up to 10 days of drying in the sun to achieve a darker color, which is inefficient; the color rendering of plant pigments is poor and the outline fineness is average.

[0224] Comparative Example 7

[0225] The fabric dyeing method provided in this comparative example is different from that in Example 1 in that the fabric is only subjected to high temperature (110° C.) drying treatment after dyeing and dehydration. Specifically, the following steps are included:

[0226] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0227] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0228] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0229] Step (4): Weigh the persimmon liquid and dilute it according to the volume ratio of persimmon liquid to pure water = 1:2 to obtain the dye solution; according to the bath ratio of 1:20, slowly pour the dye solution into the dyeing container and soak the fabric for 20 minutes.

[0230] Step (5): Take out the dyed fabric, and dehydrate it with a dehydrator until the moisture content is 35%, and dry the dehydrated fabric at 110° C. for 25 minutes.

[0231] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0232] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0233] The persimmon dyeing result of the fabric is shown in the figure below. Fig.17 As shown, only high-temperature drying is used for drying, and the efficiency is improved compared to conventional drying; the plant pigment has good color rendering, but the outline is poor, and there are blocky water marks on the surface, and the color is uneven.

[0234] Comparative Example 8

[0235] The fabric dyeing method provided in this comparative example is different from that in Example 1 in that the fabric is first dried at 30°C for 4 minutes after being dyed and dehydrated, and then dried for a second time at 60°C for 25 minutes. Specifically, the following steps are included:

[0236] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0237] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0238] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0239] Step (4): Weigh the persimmon liquid, dilute it according to the volume ratio of persimmon liquid:pure water=1:2 to obtain dye solution, slowly pour the dye solution into the dyeing container according to the bath ratio of 1:20, and soak the fabric for 20 minutes.

[0240] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 60° C. for 25 min.

[0241] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0242] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0243] The persimmon dyeing result of the fabric is shown in the figure below. Fig.18 As shown, the method of performing two drying treatments at low temperature has improved efficiency compared to conventional drying; the color rendering of plant pigments is poor and the contour fineness is average.

[0244] Comparative Example 9

[0245] The fabric dyeing method provided in this comparative example is different from that in Example 1 in that after the fabric is dyed and dehydrated, it is first dried at 30°C for 4 minutes, and then dried for a second time at 120°C for 25 minutes. Specifically, it comprises the following steps:

[0246] Step (1): Fabric preparation (silk), prepare 1 meter long fabric.

[0247] Step (2): Pick unripe green persimmons in June, cut them into uniform blocks, grind them and filter them three times, then place them in sealed jars and ferment them for one year to obtain persimmon juice, the fermentation temperature is 28°C.

[0248] Step (3): Immerse the fabric to be dyed in an ethylene oxide polymer solution at a bath ratio of 1:60 to remove oil stains. The concentration of the ethylene oxide polymer is 0.5 g / L. Heat to 80°C for 20 minutes. After the treatment, wash twice at room temperature, dehydrate, put into a dryer, and dry at 60°C for 20 minutes.

[0249] Step (4): Weigh the persimmon liquid, dilute it according to the volume ratio of persimmon liquid:pure water=1:2 to obtain dye solution, slowly pour the dye solution into the dyeing container according to the bath ratio of 1:20, and soak the fabric for 20 minutes.

[0250] Step (5): The dyed fabric is fished out and dehydrated by a dehydrator until the moisture content is 35%. The dehydrated fabric is initially dried at 30° C. for 4 min, and then dried for a second time at 120° C. for 25 min.

[0251] Step (6): Repeat steps (4) to (5) three times and dry naturally for 5 days.

[0252] Step (7): Wash the fabric after drying and then dry it at 90° C. to obtain the dyed fabric.

[0253] The persimmon dyeing result of the fabric is shown in the figure below. Fig.19 As shown, drying at high temperature is more efficient than conventional drying; the plant pigment has good color rendering, but the outline is poor, and the fabric surface becomes hard and burnt.

[0254] The color fastness to soaping and color fastness to light of the dyed fabrics obtained in the examples and comparative examples were tested, and the results are shown in Table 1 below.

[0255] Color fastness to soap washing: tested according to Q / JX 3-2016 "Plant-dyed woven garments";

[0256] Color fastness to light: tested according to Q / JX 3-2016 "Plant-dyed woven garments".

[0257] Table 1

[0258]

[0259]

[0260] From Table 1, Figures 1 to 19It can be seen that in the process of persimmon dyeing of fabrics, the color rendering and outline fineness of the persimmon dyed silk fabric prepared in Example 1 are better than the conventional airing treatment method of Comparative Example 1 and the low-temperature drying treatment method of Comparative Example 2, and the color fastness to soaping of the persimmon dyed silk fabric in Example 1 can reach level 4-5, and the color fastness to light can reach level 3-4, which is also significantly better than Comparative Example 1 and Comparative Example 2. Different drying methods and drying temperatures also have an effect on color rendering, outline fineness and color fastness. The color rendering, outline fineness and color fastness of Example 1 are better than Comparative Examples 7-9. Example 2-3 is based on Example 1, and different mordants (ferrous sulfate solution) or alkaline agents (sodium carbonate solution) are used for treatment, and the treatment of natural airing to deepen the color can be further omitted, which can break the yellowish color of conventional persimmon dyed silk fabrics, give the silk fabric a refreshing feel, and achieve a dyeing effect with different colors and feels, and also has good color rendering, outline fineness and color fastness.

[0261] The persimmon-dyed linen fabric prepared in Example 4 has better color rendering, contour fineness and color fastness than the conventional air-drying treatment method of Comparative Example 3 and the low-temperature drying treatment method of Comparative Example 4. Examples 5-6 are based on Example 4, and different mordants or alkali agents are used for dyeing treatment, and the natural air-drying treatment for deepening the color can be further omitted, which can break the yellowish brown color of the conventional persimmon-dyed linen fabric, achieve dyeing effects with different colors, and also have good color rendering, contour fineness and color fastness.

[0262] The persimmon-dyed cotton fabric prepared in Example 7 has better color rendering, outline fineness and color fastness than the conventional airing treatment method of Comparative Example 5. Example 8 is based on Example 7, and a different mordant (ferrous sulfate solution) is used for dyeing treatment, which can break the color of the conventional persimmon-dyed cotton fabric and achieve dyeing effects with different colors, and also has good color rendering, outline fineness and color fastness.

[0263] The persimmon-dyed chemical fiber fabric prepared in Example 9 has better color rendering, outline fineness and color fastness than the conventional airing treatment method of Comparative Example 6. Example 10 is based on Example 9, and a different mordant (ferrous sulfate solution) is used for dyeing treatment, which can break the color of the conventional persimmon-dyed chemical fiber fabric and achieve dyeing effects with different colors, and also has good color rendering, outline fineness and color fastness.

[0264] Therefore, the fabric of the embodiment of the present invention is dried at a specific temperature after persimmon dyeing is completed, wherein the fabric is first dried at a temperature of 30°C and then dried at a temperature of 110°C for a second time, which can shorten the time of more than 10 days of conventional natural drying to 4-5 days, and achieve better color fastness while achieving better color rendering and better contour fineness. In addition, after the fabric is dried at a specific temperature after persimmon dyeing, it is treated with a specific mordant or alkali agent, which can omit the natural drying process to deepen the color, further improve the persimmon dyeing efficiency, break the yellowish color of conventional persimmon dyed silk fabrics, and give the fabric a refreshing feel, achieving a dyeing effect with different colors and feels.

[0265] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0266] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for persimmon dyeing of fabrics, characterized in that: The steps include: (1) crushing unripe green persimmons and filtering them, and sealing and fermenting the obtained filtrate to obtain persimmon juice; (2) diluting the persimmon juice with water to obtain a dye solution; (3) immersing the fabric to be dyed into the dye solution for dyeing; (4) After the fabric is dyed, it is dehydrated until the moisture content of the fabric is 25% to 45%, and the dehydrated fabric is initially dried at a temperature of 20°C to 40°C for 2min to 10min, and then dried for a second time at a temperature of 80°C to 110°C for 15min to 35min; (5) Wash and dry.

2. The fabric persimmon dyeing method according to claim 1, characterized in that: In step (4), the temperature of the preliminary drying is 25°C to 35°C, preferably 28°C to 32°C.

3. The fabric persimmon dyeing method according to claim 1, characterized in that: In step (4), the temperature of the second drying is 100°C to 110°C, preferably 108°C to 110°C.

4. The fabric persimmon dyeing method according to claim 1, characterized in that: In step (4), the time of the preliminary drying is 3 min to 5 min; and / or, The second drying time is 20 minutes to 30 minutes.

5. The persimmon dyeing method according to any one of claims 1 to 4, characterized in that After step (4) and before step (5), the method further includes the following steps: The dried fabric is naturally aired for 3 to 5 days; or, the fabric is immersed in a mordant or an alkali agent for treatment.

6. The persimmon dyeing method for fabrics according to claim 5, characterized in that: The mordant is ferrous sulfate; preferably, the mordant is 0.2 g / L to 0.8 g / L ferrous sulfate, the bath ratio is 1:45 to 55, the treatment time is 8 min to 12 min, and the temperature is 55° C. to 65° C.; or, The alkali agent is 2g / L to 8g / L sodium carbonate, the bath ratio is 1:45 to 55, the treatment time is 8min to 12min, and the temperature is room temperature.

7. The fabric persimmon dyeing method according to any one of claims 1 to 4, characterized in that: The fabric is silk fabric, cotton fabric, linen fabric or chemical fiber fabric.

8. The fabric persimmon dyeing method according to any one of claims 1 to 4, characterized in that: In step (1), the filtrate is sealed and fermented for at least one year at a fermentation temperature of 25° C. to 30° C.; and / or, In step (3), before the dyeing treatment of the fabric to be dyed, the method further comprises: According to the bath ratio of 1:55-65, the fabric to be dyed is soaked in an ethylene oxide polymer solution with a concentration of 0.3g / L-1g / L and a temperature of 75℃-85℃ for 15min-25min, washed with water at room temperature, dehydrated, and dried at 55℃-65℃ for 15min-25min.

9. The fabric persimmon dyeing method according to any one of claims 1 to 4, characterized in that: In step (2), the volume ratio of the persimmon juice to water is 1:1-5, preferably 1:1-3; and / or, In step (3), the fabric to be dyed is mixed with the dye solution at a bath ratio of 1:15-25 and dyed for 15-25 minutes; and / or, In step (4), after dyeing, the fabric is dehydrated until the moisture content of the fabric is 30% to 40%, preferably 33% to 37%; and / or, Before step (5), the method further comprises: repeating steps (3) and (4) 3 to 4 times; and / or, In step (5), the drying method includes air-drying or drying at a temperature of 90 to 110°C.

10. Persimmon-dyed fabric prepared by the persimmon-dyed fabric method according to any one of claims 1 to 9.

Images