JP3949877B2 - Method for producing dyed fiber - Google Patents

Description

【００４０】
（試験２）
水酸化ナトリウム２５ｇを水３Ｌに溶解し、これにカチオン剤（シオンテック社製、蛋白質含有）１００ｇを加えてなる活性化溶液中に綿タオル１００ｇを投入し、８０℃で３０分間攪拌させながら加熱浸漬させた。
次に、タオルを取り出して脱水する一方、レマゾール反応染料ブルー０．０５ｇを水３Ｌに溶解させた染浴のｐＨを７〜１２の所定範囲に調製しておき、この染浴に当該タオルを投入して浸漬し、続いて当該染浴にテアフラン３０Ａ（伊藤園社製、茶ポリフェノール４０重量％含有）３０ｇを加え、１５〜８０℃の所定温度で３０分間加熱浸漬させた。
その後、染液を払い出し、水３Ｌに酢酸５ｇを混入させた水溶液に５分間浸漬させた後、タオルを取り出し、水洗、脱水、乾燥させてタオルの色調を観察した。
【００４１】
他方、上記と同様に活性化溶液中に綿タオル１００ｇを加熱浸漬させた後、タオルを取り出して脱水する一方、レマゾール反応染料ブルー０．０５ｇを水３Ｌに溶解させて染浴を調製しておき、この染浴に当該タオルを投入し８０℃で２０分間加熱浸漬させた。次いで、当該染浴に酢酸２ｇを加えてｐＨ５〜７に調整した染浴に当該タオルを投入して浸漬させ、続いてテアフラン３０Ａ３０ｇを加え、１５〜８０℃の所定温度で３０分間加熱浸漬させた。
その後、染液を払い出し、水３Ｌに酢酸５ｇを混入させた水溶液に５分間浸漬させた後、タオルを取り出し、水洗、脱水、乾燥させてタオルの色調を観察した。
これらの結果を以下の表２に示す。
【００４２】
【表２】

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a dyed fiber using tea polyphenol.
[0002]
[Prior art]
When the fiber is dyed using tea, the fiber can be given a texture with astringent taste peculiar to tea by fermentation (oxidation) of an oxidase (polyphenol oxidase) contained in tea leaves. For this reason, dyeing called “tea dyeing” has been performed in Japan. For example, Japanese Patent Application Laid-Open No. 58-115178 discloses a tea dyeing method in which a tea boiled liquid is placed for 2 to 3 days, a supernatant liquid is taken, the liquid is drawn on the dough, and then a mordant is drawn thereon. Has been.
[0003]
In recent years, the antibacterial effect of tea polyphenols contained in tea leaves has attracted attention, and in the field of dyeing, the antibacterial effect is imparted together with dyeing by fixing tea polyphenols to fibers. For example, in Japanese Patent Laid-Open No. 6-173176, a fiber product is tannined in order to obtain a method for producing a tea-dyed fiber product having a unique natural color tone, various color tones, and also having antibacterial properties. After pretreatment by contacting with a pretreatment liquid containing an acid or cation agent, if necessary, contact with a mordant liquid containing a mordant and mordanting, and then contact with a dye liquor containing tea extract. A staining method is disclosed.
[0004]
[Problems to be solved by the invention]
By the way, if the fiber is dyed using tea, a natural texture with astringent taste peculiar to tea can be imparted to the fiber by the action of the oxidase (polyphenol oxidase) as described above. If you change the way you see it, the fibers will become dull due to the influence of tea, and it will be difficult to vividly dye light colors such as light pink. It was also very difficult to get.
[0005]
In addition, most conventional dyeing uses a mordant treatment method in which fibers are pre-mordanted with a metal chelate in order to obtain sufficient color tone, texture, antibacterial properties, and deodorant, and then the pigment is raked on the fibers to develop color. Although this mordant treatment method can enjoy the excellent effects as described above, the color developed by the metal chelate and the dye is limited, or if the waste is not properly treated, the environment Some people may have an allergic effect on the metal, and depending on the type of metal, some people are allergic to metal.
[0006]
On the other hand, tea extraction components, especially tea polyphenols such as catechins, change in quality when processed at high temperatures. Therefore, in dyeing using tea polyphenols, it is necessary to immerse the tea extraction solution at as low a temperature as possible, making the production process a line. Was considered difficult.
[0007]
Therefore, in view of the problems as described above, the present invention can change the color tone freely without using metal chelate in the production of dyed fibers using tea, and preferably forms a production process line. It is an object of the present invention to provide a new manufacturing method that can easily achieve the above.
[0008]
[Means for Solving the Problems]
In order to solve such a problem, the present invention is made by immersing the fiber in an activation solution, and then immersing the fiber in a treatment solution containing a dye and adjusting the pH to a desired range. Alternatively, there is provided a method for producing a dyed fiber that gives a desired color tone to a fiber by adding a tea polyphenol-containing material such as a tea extract and subsequently immersing the fiber in the tea polyphenol solution.
According to such a production method, a vivid color tone that is not affected by tea polyphenols and that is not affected by tea polyphenols can be imparted to the fibers without using a metal chelate. In addition, a desired color tone can be imparted to the fiber simply by changing the pH of the treatment solution in which the fiber is immersed.
[0009]
More specifically, after immersing the fiber in an activation solution containing a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein, and an alkaline compound, the solution contains a blue dye and has a pH in the alkaline range. The fiber is immersed in the prepared treatment solution, and then a tea polyphenol-containing material such as tea polyphenol or tea extract is added to the treatment solution, followed by heating and soaking at 60 to 90 ° C. in the tea polyphenol solution. By this, reddish purple fibers can be produced. A purple fiber can be produced by adjusting the pH of the treatment solution to a neutral range, and a blue-violet fiber can be produced by adjusting the pH to an acidic range. In addition, when the tea polyphenol solution is heated and immersed at 30 to 50 ° C., green fibers can be produced by adjusting the pH of the treatment solution to an alkaline region, and blue-green fibers can be prepared by adjusting to a neutral region. Blue fibers can be produced by adjusting to an acidic range.
However, when the fibers are immersed in a treatment solution whose pH is adjusted to the acidic range, since the coloring is relatively poor, after the fibers are immersed in the activation solution, the fibers are immersed in a dye solution containing a blue dye. It is preferable to immerse the fibers in a treatment solution that is heated and immersed at 90 ° C., and then the pH of the dye solution is adjusted to an acidic region.
[0010]
In the method for producing a dyed fiber according to the present invention, the fiber is immersed in a treatment solution containing a dye and tea polyphenol, or the fiber is immersed in a treatment solution containing tea polyphenol, and then the dye is contained. Although a procedure of immersing in a treatment solution is also conceivable, in terms of being able to uniformly impart color to the entire fiber, after immersing the fiber in a treatment solution containing a dye, the fiber is immersed in a solution containing tea polyphenol. Is preferred.
Further, the tea polyphenol solution may be a separate bath from the treatment solution containing the dye, but if the same bath as in the present invention, the step of immersing in the treatment solution containing the dye and the tea polyphenol are contained. The process of immersing in the treatment solution can be carried out on the same bath, thereby simplifying the production process and production equipment, making the production line for the dyeing process, and inexpensive and a large amount of fibers The product can be manufactured.
[0011]
In addition, as a dyeing method performed in the present invention, any dyeing method such as a dyeing method using a product dyeing paddle dyeing machine, an anti-dying liquid flow dyeing machine, a jigger dyeing machine, a yarn dyeing cheese dyeing machine, or the like may be adopted. Can do.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
As a preferred embodiment of the present invention, a method for producing a dyed fiber through 1) an activation process, 2) a dyeing process, 3) a tea polyphenol treatment process, and 4) a fixing process will be described.
[0013]
(Dyeing target)
The fibers that can be the object of the present invention are natural fibers such as cotton, hemp, silk, cellulose fibers, and animal fibers, polyester fibers, acetate fibers, nylon fibers, acrylic fibers, rayon fibers, polypropylene fibers, and polyvinyl chloride. Examples thereof include fibers, polyurethane fibers, other synthetic fibers, natural fiber and synthetic fiber blends, and all kinds of fibers such as recycled fibers. In addition, the target fiber may be a fiber in a raw yarn state, or may be a woven or non-woven fabric, or a processed fiber such as clothing or towel.
[0014]
(Activation process)
In this step, the fixation of the tea polyphenol to the fiber is promoted by immersing the fiber in the activation solution.
[0015]
As the “ activation solution ”, for example, a solution obtained by dissolving a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein and an alkaline compound in a solvent (usually an aqueous solution) can be preferably used. According to this, a dyeing seat can be generated in the fiber tissue by the interaction between the water-soluble protein and the cationic surfactant, and the tea polyphenol can be fixed to the dyeing seat.
[0016]
Here, the “cationic surfactant having a quaternary ammonium salt group” includes a quaternary ammonium compound having a chlorohydrin group, a quaternary ammonium compound having an epoxy group, and a quaternary ammonium having a trialkyl group. Compounds and other quaternary ammonium compounds can be used. For example, commercially available quaternary ammonium salt compounds such as Cotamine D86P (registered trademark, manufactured by Kao Corporation) can be used. Further, for example, Neofix R170 (registered trademark, manufactured by NIPPON CHEMICAL CO., LTD.), SENKAFIX 217 or 170 (registered trademark, manufactured by Nippon Dyeing Co., Ltd.), Dunfix (registered trademark, manufactured by Nitto Boseki Co., Ltd.), etc. A quaternary ammonium salt polymer can also be used.
This cationic surfactant is preferably contained in an amount of 1 to 200% by weight or less based on the weight of the fiber in the activation treatment solution.
[0017]
As the “water-soluble protein”, gelatin, casein and other water-soluble proteins can be used, and among them, silk protein can be preferably used. This water-soluble protein is preferably contained in the activation treatment solution at 8 to 40% by weight, particularly 20 to 40% by weight.
[0018]
As the “alkaline compound”, for example, alkali metal hydroxides such as sodium hydroxide, sodium hydrogen carbonate, sodium carbonate, and other hydrogen carbonates and carbonates can be preferably used. Of these, sodium hydroxide is generally used. Can be suitably used.
The concentration of the alkaline compound is preferably adjusted as appropriate within a range of 0.1 to 5% by weight depending on the type of fiber to be dyed. For example, in the case of cellulose fibers, it is preferable to contain 4 to 5% by weight of sodium hydroxide.
[0019]
The immersion in the activating solution is preferably performed by heating to 60 ° C. or higher, preferably 70 ° C. to 90 ° C. If it is lower than 60 ° C., it may not be fully activated.
In addition, it is arbitrary to perform desizing or refining bleaching on the fiber according to a conventional method before the activation step.
[0020]
In view of the above, the activation step is performed by introducing fibers into an activation treatment solution containing a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein, and an alkaline compound. It is preferable to heat to 60 ° C. or higher, preferably 70 ° C. to 90 ° C. and soak for a predetermined time.
[0021]
(Dyeing process)
In this step, the fibers that have been activated as described above are poured into a treatment solution A (usually an aqueous solution) containing a dye and having a pH adjusted to a desired value, and are immersed therein.
[0022]
Here, the “pigment dye” is a dye composed of one or more selected from the group consisting of direct dyes, acid dyes, reactive dyes, selenium dyes, disperse dyes, oxidation dyes, food dyes, and pigment resins. Can be used.
The concentration of the pigment dye may be appropriately changed depending on the type of dye and the color tone applied to the fiber.
[0023]
As the pH adjusting means, the pH of the processing solution A may be adjusted to a desired range of 3 to 12 by adding acid or alkali to the processing solution containing the dye. If this range is significantly exceeded, the fiber itself may be damaged by acid or alkali.
As an acid used for pH adjustment, it is preferable to add a hydroxycarboxylic acid such as acetic acid, tartaric acid, citric acid or malic acid.
Examples of the alkali include soda ash and sodium hydroxide.
[0024]
(Tea polyphenol treatment process)
In this step, the fiber immersed in the treatment solution A in the above step is immersed in the tea polyphenol solution. Specifically, a tea polyphenol-containing material is added to the treatment solution A to prepare a tea polyphenol solution, and the fibers are subsequently immersed in the tea polyphenol solution. That is, it is preferable to perform the treatment in the same bath as the above dyeing step.
[0025]
Here, “tea polyphenol” means tea tree, that is, Camellia sinensis L. Epicatechins, epigallocatechins, epicatechin gallates, epigallocatechin gallates obtained by extraction from non-fermented teas such as green tea, semi-fermented teas such as oolong tea, fermented teas such as black tea The term “tea polyphenol-containing product” is intended to include a mixture containing only tea polyphenol and tea polyphenol such as tea extract.
In this case, it is preferable to adjust the concentration in the tea polyphenol solution so that the amount of the tea polyphenol is 0.1 to 20% by weight, particularly 5% by weight or more based on the fiber weight .
[0026]
The immersion in the tea polyphenol solution is preferably carried out by adjusting the bath temperature of the tea polyphenol solution to a predetermined temperature in the range of 0 ° C. to 90 ° C. and maintaining the predetermined temperature for 10 to 100 minutes. As described above, when the tea polyphenol solution is too hot, that is, 90 ° C. or higher, the tea polyphenol may be deteriorated. On the other hand, when the bath temperature of the tea polyphenol solution is significantly lower than 30 ° C., a generally light color tone can be imparted to the fibers regardless of the pH of the treatment solution A.
[0027]
(Fixing process)
In this step, it is preferable to adjust the pH of the treatment solution A in the range of 3 to 5, for example, by adding an acid to the tea polyphenol solution.
In this case, it is preferable to add a hydroxycarboxylic acid such as acetic acid, tartaric acid, citric acid or malic acid as the acid used.
In addition, although an adhering process does not necessarily need to be performed, in order to improve fastness, it is preferable to perform an adhering process.
[0028]
After performing the above steps, a dyed fiber product having antibacterial properties can be obtained by washing with water, dehydration, drying and the like by a conventional method.
[0029]
Example 1
Dissolve 25 g of sodium hydroxide in 3 liters of water, add 100 g of cotton towel into an activated solution containing 100 g of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and heat while stirring at 80 ° C. for 30 minutes. Soaked.
Next, the towel is taken out and dehydrated, while 0.05 g of Remazole reactive dye blue and 30 g of soda ash are dissolved in 3 L of water to prepare a pH 12 dye bath, and the towel is put into this dye bath. Then, 30 g of Tearfuran 30A (produced by Itoen Co., Ltd., containing 40% by weight of tea polyphenol) was added to the dye bath, and heated and immersed at 80 ° C. for 30 minutes.
Thereafter, the dyeing solution was dispensed and immersed in an aqueous solution in which 5 g of acetic acid was mixed in 3 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried to obtain a red-purple towel.
[0030]
(Example 2)
Dissolve 25 g of sodium hydroxide in 3 liters of water, add 100 g of cotton towel into an activated solution containing 100 g of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and heat while stirring at 80 ° C. for 30 minutes. Soaked.
Next, the towel is taken out and dehydrated, while 0.05 g of Remazole reactive dye blue is dissolved in 3 L of water to prepare a pH 7 dye bath, and the towel is put into the dye bath and immersed therein. 30 g of theafuran 30A (manufactured by ITO EN Co., Ltd., containing 40% by weight of tea polyphenol) was added to the dye bath, and heated and immersed at 80 ° C. for 30 minutes.
Thereafter, the dyeing solution was discharged and immersed in an aqueous solution in which 5 g of acetic acid was mixed in 3 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried to obtain a purple towel.
[0031]
(Example 3)
Dissolve 25 g of sodium hydroxide in 3 liters of water, add 100 g of cotton towel into an activated solution containing 100 g of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and heat while stirring at 80 ° C. for 30 minutes. Soaked.
Next, the towel is taken out and dehydrated, while 0.05 g of Remazole reactive dye blue is dissolved in 3 L of water to prepare a dye bath, and the towel is put into this dye bath and heated and immersed at 80 ° C. for 20 minutes. It was. Next, 2 g of acetic acid was added to the dye bath, and the towel was poured and immersed in a dye bath adjusted to pH 5, followed by addition of 30 g of theafuran 30A (produced by ITO EN, containing 40% by weight of tea polyphenol) at 80 ° C. It was immersed in heating for a minute.
Thereafter, the towel was taken out, washed with water, dehydrated and dried to obtain a blue-purple towel.
[0032]
Example 4
In this example, cotton knit was dyed using a liquid flow dyeing machine.
Dissolve 250 g of sodium hydroxide in 75 L of water, add 5 kg of cotton knit to an activated solution obtained by adding 1 kg of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and circulate the activated solution at 80 ° C. For 30 minutes.
Next, the towel is poured and immersed in a dye bath of pH 12 in which 2.5 g of Remazole reactive dye blue and 750 g of soda ash are dissolved, and subsequently 150 g of Tearfuran 30A (produced by ITO EN, containing 40% by weight of tea polyphenol) is added. In addition, it was heated and immersed at 50 ° C. for 30 minutes.
Thereafter, the dyeing solution was discharged and immersed in an aqueous solution in which 500 g of acetic acid was mixed with 75 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried to obtain a green knit.
[0033]
(Example 5)
In this example, cotton knit was dyed using a liquid flow dyeing machine.
Dissolve 250 g of sodium hydroxide in 75 L of water, add 5 kg of cotton knit to an activated solution obtained by adding 1 kg of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and circulate the activated solution at 80 ° C. For 30 minutes.
Next, the towel was put into a dye bath of pH 7 in which 2.5 g of Remazole reactive dye blue was dissolved, and then 150 g of Tearfuran 30A (produced by Itoen Co., Ltd., containing 40% by weight of tea polyphenol) was added thereto at 50 ° C. For 30 minutes.
Thereafter, the dyeing solution was discharged and immersed in an aqueous solution in which 500 g of acetic acid was mixed with 75 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried to obtain a blue-green knit.
[0034]
(Example 6)
In this example, cotton knit was dyed using a liquid flow dyeing machine.
Dissolve 250 g of sodium hydroxide in 75 L of water, add 5 kg of cotton knit to an activated solution obtained by adding 1 kg of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and circulate the activated solution at 80 ° C. For 30 minutes.
Next, the towel was put into a dye bath in which 2.5 g of Remazole reactive dye blue was dissolved, and heated and immersed at 80 ° C. for 20 minutes, and then immersed in a dye bath adjusted to pH 5 by adding 100 g of acetic acid to the dye bath. Subsequently, 150 g of Tearfuran 30A (manufactured by ITO EN Co., Ltd., containing 40% by weight of tea polyphenol) was added, and the mixture was immersed in heat at 50 ° C. for 30 minutes.
Thereafter, the dyeing solution was discharged, washed with water, dehydrated and dried to obtain a blue knit.
[0035]
(Reference Example 1)
Dissolve 25 g of sodium hydroxide in 3 liters of water, add 100 g of cotton towel into an activated solution containing 100 g of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and heat while stirring at 80 ° C. for 30 minutes. Soaked.
Next, the towel is taken out and dehydrated, while 0.05 g of Remazole reactive dye blue and 30 g of soda ash are dissolved in 3 L of water to prepare a pH 12 dye bath, and the towel is put into this dye bath. Next, 30 g of Tearfuran 30A (manufactured by ITO EN, containing 40% by weight of tea polyphenol) was added to the dye bath and immersed for 30 minutes. In addition, the bath temperature at this time was 15-18 degreeC.
Thereafter, the dyeing solution was discharged and immersed in an aqueous solution in which 5 g of acetic acid was mixed in 3 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried to obtain a pale green towel.
[0036]
(Reference Example 2)
Dissolve 25 g of sodium hydroxide in 3 liters of water, add 100 g of cotton towel into an activated solution containing 100 g of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and heat while stirring at 80 ° C. for 30 minutes. Soaked.
Next, the towel is taken out and dehydrated, while 0.05 g of Remazole reactive dye blue is dissolved in 3 L of water to prepare a pH 7 dye bath, and the towel is put into the dye bath and immersed therein. 30 g of Teafuran 30A (manufactured by ITO EN, containing 40% by weight of tea polyphenol) was added to the dye bath and immersed for 30 minutes. In addition, the bath temperature at this time was 15-18 degreeC.
Thereafter, the dyeing solution was dispensed and immersed in an aqueous solution in which 5 g of acetic acid was mixed in 3 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried to obtain a pale blue-green towel.
[0037]
(Reference Example 3)
Dissolve 25 g of sodium hydroxide in 3 liters of water, add 100 g of cotton towel into an activated solution containing 100 g of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and heat while stirring at 80 ° C. for 30 minutes. Soaked.
Next, the towel is taken out and dehydrated, while 0.05 g of Remazole reactive dye blue is dissolved in 3 L of water to prepare a dye bath, and the towel is put into this dye bath and heated and immersed at 80 ° C. for 20 minutes. It was. Next, 2 g of acetic acid was added to the dye bath, and the towel was put into a dye bath adjusted to pH 5 and immersed therein, followed by 30 g of theafuran 30A (produced by ITO EN, containing 40% by weight of tea polyphenol), and immersed for 30 minutes. I let you. In addition, the bath temperature at this time was 15-18 degreeC.
Thereafter, the dyeing solution was discharged and immersed in an aqueous solution in which 5 g of acetic acid was mixed in 3 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried to obtain a light blue towel.
[0038]
(Test 1)
The towels and knits obtained in Examples 1 to 6 were measured for light fastness, wash fastness, sweat fastness and friction fastness, and the results are shown in Table 1 below.
[0039]
[Table 1]

[0040]
(Test 2)
Dissolve 25 g of sodium hydroxide in 3 liters of water, add 100 g of cotton towel into an activated solution containing 100 g of a cation agent (manufactured by Siontec Co., Ltd., containing protein), and heat while stirring at 80 ° C. for 30 minutes. Soaked.
Next, the towel is taken out and dehydrated, while the pH of the dye bath in which 0.05 g of remazole reactive dye blue is dissolved in 3 L of water is adjusted to a predetermined range of 7 to 12, and the towel is put into this dye bath. Then, 30 g of theafuran 30A (manufactured by ITO EN Co., Ltd., containing 40% by weight of tea polyphenol) was added to the dye bath, and heated and immersed at a predetermined temperature of 15 to 80 ° C. for 30 minutes.
Thereafter, the dyeing solution was discharged and immersed in an aqueous solution in which 5 g of acetic acid was mixed in 3 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried, and the color tone of the towel was observed.
[0041]
On the other hand, after 100 g of cotton towel was heated and immersed in the activation solution in the same manner as described above, the towel was taken out and dehydrated, while 0.05 g of Remazole reactive dye blue was dissolved in 3 L of water to prepare a dye bath. The towel was put into this dye bath and heated and immersed at 80 ° C. for 20 minutes. Then, 2 g of acetic acid was added to the dye bath, and the towel was put into a dye bath adjusted to pH 5 to 7 so as to be immersed therein. Subsequently, 30 g of theafuran 30A was added, followed by heat immersion at a predetermined temperature of 15 to 80 ° C. for 30 minutes. .
Thereafter, the dyeing solution was discharged and immersed in an aqueous solution in which 5 g of acetic acid was mixed in 3 L of water for 5 minutes, and then the towel was taken out, washed with water, dehydrated and dried, and the color tone of the towel was observed.
These results are shown in Table 2 below.
[0042]
[Table 2]

Claims (7)

After immersing the fiber in an activation solution containing a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein and an alkaline compound, the treatment solution containing a dye and adjusting the pH to a desired range is added to the treatment solution. It is characterized by immersing the fiber, subsequently adding a tea polyphenol-containing material such as tea polyphenol or tea extract to the treatment solution, and subsequently immersing the fiber in the tea polyphenol solution to give the fiber a desired color tone. A method for producing dyed fibers.  A treatment solution in which a fiber is immersed in an activation solution containing a quaternary ammonium salt group, a cationic surfactant, a water-soluble protein and an alkaline compound, and then a blue dye is contained and the pH is adjusted to an alkaline region. The fiber is soaked in, followed by adding a tea polyphenol-containing material such as tea polyphenol or tea extract to the treatment solution, followed by heating and soaking in the tea polyphenol solution at 60 to 90 ° C. A method for producing fibers.  A treatment in which a fiber is immersed in an activation solution containing a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein and an alkaline compound, and then containing a blue dye and adjusting the pH to a neutral region. A purple color characterized by immersing the fiber in a solution, and subsequently adding a tea polyphenol-containing material such as tea polyphenol or tea extract to the treatment solution, followed by heating and immersing in the tea polyphenol solution at 60 to 90 ° C. A method for producing fibers.  After immersing the fiber in an activation solution containing a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein and an alkaline compound, the fiber is immersed in a dye solution containing a blue dye at 60 to 90 ° C. Then, the fiber is immersed in a treatment solution obtained by heating and soaking, and subsequently adjusting the pH of the dye solution to an acidic region, and then a tea polyphenol-containing material such as tea polyphenol or tea extract is added to the treatment solution. A method for producing blue-violet fibers, characterized in that the tea polyphenol solution is subsequently immersed in heat at 60 to 90 ° C.  A treatment solution in which a fiber is immersed in an activation solution containing a quaternary ammonium salt group, a cationic surfactant, a water-soluble protein and an alkaline compound, and then a blue dye is contained and the pH is adjusted to an alkaline region. The fiber is soaked in a green fiber, and subsequently a tea polyphenol-containing material such as tea polyphenol or tea extract is added to the treatment solution, followed by heating and soaking in the tea polyphenol solution at 30 to 50 ° C. Manufacturing method.  A treatment in which a fiber is immersed in an activation solution containing a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein, and an alkaline compound, and then a blue dye is contained and the pH is adjusted to a neutral region. A blue characterized in that the fiber is immersed in a solution, and subsequently a tea polyphenol-containing material such as tea polyphenol or tea extract is added to the treatment solution, followed by heating and immersion in the tea polyphenol solution at 30 to 50 ° C. Green fiber manufacturing method.  After immersing the fiber in an activation solution containing a cationic surfactant having a quaternary ammonium salt group, a water-soluble protein and an alkaline compound, the fiber is immersed in a dye solution containing a blue dye at 60 to 90 ° C. Then, the fiber is immersed in a treatment solution obtained by heating and soaking, and subsequently adjusting the pH of the dye solution to an acidic region, and then a tea polyphenol-containing material such as tea polyphenol or tea extract is added to the treatment solution. A method for producing blue fibers, characterized in that the tea polyphenol solution is subsequently immersed in heat at 30 to 50 ° C.