Fiber material manufacturing method and fiber material

Abstract

The present invention provides a method for producing a fiber material, said method being capable of performing a scouring treatment without using sodium hydroxide that is strongly alkaline, while being also capable of performing the scouring treatment and a bleaching treatment at the same time in a single bath. A method for producing a fiber material that contains at least one kind of fibers selected from among natural fibers and regenerated cellulose fibers, said method comprising: preparation of a fiber material that is to be subjected to a scouring treatment and a bleaching treatment; and treatment of the fiber material with a treatment liquid that has an initial pH of from 9 to 11, while containing (1) a chelating agent, (2) a surfactant, (3) a bleaching agent, and (4) an alkali treatment agent that does not contain sodium hydroxide.

Description

[Technical Field]

[0001] The present disclosure relates to a method for producing a fibrous material and to a fibrous material.

[0002] When manufacturing textile materials (e.g., raw cotton, raw yarn, woven fabrics, knitted fabrics, etc.) made from natural fibers and / or regenerated cellulose fibers, a scouring process is generally carried out to remove metals, pectin, waxes (including wax), fats, etc. adhering to the fibers. The scouring process improves the water absorption of the textile material, making it easier to dye the textile material.

[0003] Taking cotton as an example, typical scouring treatment for cotton is carried out using a strongly alkaline treatment solution, which is an aqueous solution containing sodium hydroxide to which a surfactant has been added. While this method can impart the desired water absorbency to the treated cotton, it is prone to embrittlement and hardening of the cotton. Furthermore, when scouring treatment using a strongly alkaline treatment solution is applied to blends of cotton and protein fibers (e.g., wool, silk, cashmere), the protein fibers tend to be damaged or dissolved. Furthermore, the strongly alkaline treatment solution requires neutralization with a large amount of neutralizing agent during wastewater treatment, which places a heavy burden on users.

[0004] In view of these problems, Patent Document 1 proposes a method for treating fibrous material, which includes a step of desizing the fibrous material using an acidic treatment solution containing an amylase enzyme and a surfactant to remove the sizing agent adhering to the fibrous material, and simultaneously scouring the fibrous material, in which the acidic treatment solution has a pH in the range of 3 to 6 and contains an acid capable of donating protons, and attacks the pectic metal contained in the fibrous material with protons to convert it to pectic acid, and the metal contained in the pectic metal is eluted as ions during the acidic treatment.

[0005] Furthermore, the scoured textile material is usually subjected to a bleaching treatment. Bleaching is generally carried out by treating with a bleaching agent in a bath separate from the one used for scouring (two-bath method), or by adding bleaching agent to the bath used for scouring after the scouring process is completed (one-bath, two-stage method). These methods involve separate scouring and bleaching processes, which are costly and time-consuming. To address this issue, Patent Document 2 proposes a one-bath desizing, scouring, and bleaching treatment agent containing a make-up bath agent containing at least a surfactant, a transition metal complex, and an amine compound, an alkaline component, and a bleaching oxidizing agent. Patent Document 3 proposes performing desizing and bleaching in a single operation within a predetermined pH range in a bath containing hydrogen peroxide, sodium hydroxide, a chelating agent, an enzyme preparation based on amylolytic enzymes, and a surfactant. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5554172 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-9365 [Patent Document 3] Special Publication No. 2-2989 Summary of the Invention [Problem to be solved by the invention]

[0007] To provide a method for producing a fiber material, which can carry out a scouring treatment without using sodium hydroxide, which exhibits strong alkalinity, and can carry out the scouring treatment and the bleaching treatment simultaneously in one bath. [Means for solving the problem]

[0008] The present disclosure provides a method for producing a fiber material comprising at least one selected from natural fibers and regenerated cellulose fibers, the method comprising: Preparing a textile material for scouring and bleaching treatment; treating the textile material with a treatment solution containing 1) a chelating agent, 2) a surfactant, 3) a bleaching agent, and 4) an alkaline treatment agent not containing sodium hydroxide, and having an initial pH of 9 to 11; The present invention provides a method for producing a fiber material, comprising: [Effects of the Invention]

[0009] The manufacturing method of the present disclosure allows metals to be removed from pectic metals in fiber materials without using sodium hydroxide by simultaneously applying a chelating agent, a surfactant, and a bleaching agent under conditions of an initial pH of 9 to 11, thereby reducing the effort required for wastewater treatment. Furthermore, the manufacturing method of the present disclosure allows bleaching to be carried out simultaneously with the refining of fiber materials, enabling efficient production of fiber materials. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a micrograph showing the state of remaining wool in the knitted fabric obtained in Example 2-1. [Figure 2] 1 is a micrograph showing the remaining state of wool in a knitted fabric obtained in a reference example. [Figure 3] 1 is a micrograph showing the remaining state of wool in the knitted fabric obtained in Comparative Example 2-1. [Figure 4] 1 is an electron microscope photograph (SEM image) showing the state of the fiber surface in the knitted fabric obtained in Example 1-4. [Figure 5] 1 is an electron microscope photograph (SEM image) showing the state of the fiber surface in the knitted fabric obtained in Example 1-5. [Figure 6] 1 is an electron microscope photograph (SEM image) showing the state of the fiber surface in the knitted fabric obtained in Example 1-6. [Figure 7] This is an electron microscope photograph (SEM image) showing the state of the fiber surface in an unscouring and bleached knitted fabric. DETAILED DESCRIPTION OF THE INVENTION

[0011] (Background to the present embodiment) The present inventors investigated a method for scouring textile materials without using strong alkaline sodium hydroxide, which would provide a scouring effect equivalent to or better than that achieved by using sodium hydroxide, and which would enable scouring and bleaching to be performed in a single bath. As a result, they discovered that a treatment solution with an initial pH of 9 to 11, which combines a chelating agent with an alkaline treatment agent, a surfactant, and a bleaching agent, allows scouring and bleaching to be performed simultaneously, and produces textile materials with excellent water absorption and diffusibility and a low amount of residual metal, leading to the present embodiment.

[0012] Chelating agents have been commonly used in scouring treatments using sodium hydroxide to remove metal ions contained in the water used during scouring treatment. Furthermore, scouring treatments for cellulose fibers using a combination of enzymes and chelating agents instead of sodium hydroxide scouring have also been proposed. However, no method has been proposed for using a chelating agent as the primary scouring agent, or for performing scouring and bleaching in a single bath using a chelating agent. The present inventors have discovered that scouring and bleaching treatments can be performed in a single bath by using a chelating agent, which has previously been used only as an auxiliary agent, together with a bleaching agent under certain conditions.

[0013] <Embodiment 1: Method for producing fiber material> The method for producing a fiber material of the present embodiment is a method for producing a fiber material containing at least one selected from natural fibers and regenerated cellulose fibers, Preparing a textile material for scouring and bleaching treatment; treating the textile material with a treatment solution containing 1) a chelating agent, 2) a surfactant, 3) a bleaching agent, and 4) an alkaline treatment agent not containing sodium hydroxide, and having an initial pH of 9 to 11; Includes.

[0014] [Preparation of fiber material] The fiber material produced in this embodiment includes at least one selected from natural fibers and regenerated cellulose fibers. Examples of natural fibers include plant fibers such as cotton, kapok, flax, ramie, hemp, jute, Manila hemp, sisal, palm fiber, coconut fiber, and pulp (wood pulp, etc.), and animal fibers such as silk, sheep wool, cashmere, angora, and alpaca. Examples of regenerated cellulose fibers include viscose rayon, cupro, and solvent-spun cellulose fibers (e.g., microwave-cured lyocell and Tencel).

[0015] The textile materials produced in this embodiment broadly include those composed of fibers, such as raw cotton, yarn (including paper yarn), tow, top, skein, woven fabric (including union woven fabric), nonwoven fabric, knitted fabric (including union knit), and products using woven fabric, nonwoven fabric, or knitted fabric (hereinafter, these are collectively referred to as "woven fabric products"). The woven fabric products may be, for example, clothing (including socks and hats), futon covers, bedsheets, towels, and blankets. The woven fabrics, knitted fabrics, and woven fabric products may contain two or more fibers, such as blended or twisted yarns. According to this embodiment, embrittlement of alkali-sensitive protein fibers such as animal fibers can be suppressed, and therefore, the manufacturing method of this embodiment can also be applied to blended, twisted, union woven, and union knitted products using protein fibers.

[0016] In this case, the combination of two or more fibers may be a combination of two or more natural fibers, a combination of natural fibers and synthetic fibers, a combination of natural fibers and regenerated cellulose fibers, a combination of two or more regenerated cellulose fibers, or a combination of regenerated cellulose fibers and synthetic fibers. Examples of combinations of two or more natural fibers include combinations of plant fibers / animal fibers (e.g., cotton / wool, cotton / silk), as well as combinations of two or more plant fibers (e.g., cotton / flax), and combinations of two or more animal fibers (wool / silk). These examples of combinations may be examples of combinations of yarn materials that make up blends and interwoven fabrics.

[0017] The manufacturing method of this embodiment includes preparing a fibrous material to be subjected to a scouring treatment. "Preparing a fibrous material to be subjected to a scouring treatment" refers to a process of preparing a fibrous material that has not yet been scouring-treated and that requires scouring treatment. This preparation process includes not only producing raw cotton, raw yarn, woven fabric, knitted fabric, and woven / knitted fabric products, but also obtaining items that are distributed in the form of yarn, woven fabric, knitted fabric, or fabric products (but that have not been scouring-treated) and performing the operations or processing required for the scouring treatment process described below. Such operations or processing may be, for example, placing the fibrous material in an apparatus, or cutting the fibrous material, etc. to an appropriate size.

[0018] [Treatment of textile materials with treatment liquid] In the manufacturing method of this embodiment, as described above, the fibers are treated with a treatment solution having an initial pH of 9 to 11, which contains 1) a chelating agent, 2) a surfactant, 3) a bleaching agent, and 4) an alkaline treatment agent that does not contain sodium hydroxide.

[0019] (chelating agent) Chelating agents are used to capture and remove metals contained in fibers. The chelating agent may be, for example, at least one selected from aminocarboxylic acid-based chelating agents, polyacrylic acid-based chelating agents, acrylic acid / maleic acid copolymer chelating agents, dicarboxylic acid-based chelating agents, phosphonic acid-based chelating agents, and gluconic acid-based chelating agents. These chelating agents may be provided as salts. Examples of the salt include metal salts and ammonium salts. Examples of metal salts include sodium salts and potassium salts, with sodium salts being particularly preferred in terms of their metal-capturing properties and solubility in water. Furthermore, since sodium salts are easily released as bases in the treatment solution, using sodium salts allows the chelating agent from which the sodium salt has been released to bind / capture metals in the fibers, while the released bases bind to pectin in the fibers, promoting the release of pectin.

[0020] Examples of aminocarboxylic acid chelating agents include ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glutamic acid diacetic acid, nitrotriacetic acid, hydroxyethyliminodiacetic acid, dihydroxyethylglycine, (S,S)-ethylenediaminedisuccinic acid, ethylenediaminehydroxyethyltriacetic acid, and triethylenetetraminehexaacetic acid, methylglycinediacetic acid trisodium salt, and salts thereof.

[0021] The aminocarboxylic acid chelating agents preferably used in this embodiment are ethylenediaminetetraacetic acid and its salts, diethylenetriaminepentaacetic acid and its salts, and glutamic acid diacetic acid and its salts. These aminocarboxylic acid chelating agents have many ligands in one molecule, and are therefore preferred in that they produce stable chelate compounds for metals with a high coordination number.

[0022] Examples of polyacrylic acid chelating agents include ALBATEX AD-01 (trade name) sold by Huntsman Japan Co., Ltd. and AQUALIC FH (trade name) sold by Nippon Shokubai Co., Ltd. Examples of acrylic maleic acid chelating agents include Dekol SN-S liq (trade name) sold by Archroma Japan Co., Ltd. and AQUALIC TL400 (trade name) sold by Nippon Shokubai Co., Ltd. Examples of phosphonic acid chelating agents include hydroxyethylidienediphosphonic acid, nitrilotris(methylenephosphonic acid), 2-phosphonobutane-1,2,4-tricarboxylic acid, and ethylenediaminetetramethylenephosphonic acid, as well as their metal salts and ammonium salts. Another example of a phosphonic acid chelating agent is KWB-25 (trade name) sold by Senka Corporation.

[0023] Of the chelating agents exemplified above, the aminocarboxylic acid chelating agents, polyacrylic acid chelating agents, and acrylic acid / maleic acid copolymer chelating agents do not contain phosphorus, and are therefore preferably used when their involvement in the production of phosphorus or phosphorus-containing substances is not desired.

[0024] Among the chelating agents exemplified above, some are used as cosmetic raw materials or edible raw materials (e.g., food additives). For example, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, ethylenediaminehydroxyethyltriacetic acid, hydroxyethylidienediphosphonic acid, gluconic acid, and their metal salts (especially sodium salts) are used as cosmetic raw materials. Furthermore, for example, disodium salt of ethylenediaminetetraacetic acid and sodium salt of gluconic acid are used as edible raw materials (food additives). Therefore, textile materials produced using these chelating agents can provide consumers with a sense of security in that they have been treated with agents that are also used in cosmetics and foods.

[0025] Other examples of chelating agents used as cosmetic or edible raw materials include trisodium methylglycine diacetate, sodium polyacrylate, sodium metaphosphate, 1-hydroxyethylidene-1,1-diphosphonic acid, tetrasodium L-glutamate diacetate, and tetrasodium 3-hydroxy-2,2'-iminodisuccinate, which can also be used as chelating agents in this embodiment.

[0026] From the viewpoint of metal capturing ability, the chelating agent preferably has a pH of 4 to 13, preferably 5 to 12, and particularly preferably 7 to 10. When a chelating agent having a pH in the above range is used, the initial pH of a treatment solution containing an alkaline treatment agent that does not contain sodium hydroxide can be adjusted to 9 to 11 when scouring and bleaching a textile material.

[0027] (surfactant) Any surfactant commonly used in scouring treatment can be used. In this embodiment, at least one surfactant selected from nonionic surfactants and anionic surfactants is preferably used. These surfactants have excellent dispersion and detachment properties for cellulose fibers compared to cationic surfactants and amphoteric surfactants, and are less likely to reattach.

[0028] Nonionic surfactants include, for example, higher alcohol alkylene oxide adducts, fatty acid alkylene oxide adducts, and glycerol fatty acid esters, and also include sucrose fatty acid esters such as glucamide surfactants, alkyl polyglycosides, glutamine, and sorbitan fatty acid esters. Anionic surfactants include, for example, higher alcohol sulfates, sulfated fatty acid esters, α-olefin sulfonates, and alkylbenzene sulfonates.

[0029] The surfactant may be selected depending on the type of chelating agent. For example, the combination of chelating agent / surfactant may be selected from the following: diethylenetriaminepentaacetate / nonionic and / or anionic surfactant, ethyleneaminetetraacetate / nonionic and / or anionic surfactant, hydroxyethylidene diphosphonate / nonionic and / or anionic surfactant, dicarboxymethyl glutamate / nonionic and / or anionic surfactant, 3-hydroxy-2,2'iminodisuccinate / nonionic and / or anionic surfactant, diethylenetriaminepentaacetate / glucamide, ethyleneaminetetraacetate / glucamide, hydroxyethylidene diphosphonate / glucamide, dicarboxymethyl glutamate / glucamide, diethylenetriaminepentaacetate / glucamide, alkyl polyglucoside / glucamide, diethylene ... When acetate / glucamide, diethylenetriaminepentaacetate / alkylpolyglucoside, ethyleneaminetetraacetate / alkylpolyglucoside, hydroxyethylidene salt / alkylpolyglucoside, phosphonate / alkylpolyglucoside, methyl dicarboxylate polyglucoside / alkylpolyglucoside, or diethylenetriaminepentaacetate / alkylpolyglucoside is used, the refining treatment tends to be carried out more efficiently, and a textile material with better water absorption and diffusibility tends to be obtained.

[0030] Some surfactants are used as cosmetic raw materials or edible raw materials (e.g., food additives). For example, sucrose fatty acid esters such as glucamides and sugar-based surfactants, alkyl polyglucosides, sorbitan fatty acid esters, higher alcohol alkylene oxide adducts, fatty acid alkylene oxide adducts, higher alcohol sulfates, sulfated fatty acid esters, and α-olefin sulfonates are used as cosmetic raw materials. In addition, sucrose fatty acid esters and sorbitan fatty acid esters are edible and are used as food additives. Combining these surfactants with the above-mentioned cosmetic raw materials or chelating agents, which are edible raw materials, can provide fiber materials that provide consumers with a greater sense of security.

[0031] Other examples of glucamide surfactants used as cosmetic raw materials include lauroyl glucamide, lauroyl / myristoyl methyl glucamide, cocoyl methyl glucamide, and sunflower fatty acid methyl glucamide, which can also be used as surfactants for scouring and bleaching treatments in this embodiment.

[0032] (bleach) In this embodiment, the bleaching agent may be an oxidizing agent or a reducing agent. Examples of oxidizing bleaching agents include chlorine-based bleaching agents such as sodium hypochlorite and sodium (or potassium) dichloroisocyanurate, as well as oxygen-based bleaching agents such as sodium percarbonate, sodium perborate, sodium monopersulfate, and hydrogen peroxide. Examples of reducing bleaching agents include hydrosulfite (sodium dithionite dihydrate), sodium disulfite (sodium acid sulfite), and thiourea dioxide. In particular, when sodium carbonate or sodium bicarbonate is used as the alkaline treatment agent, it is easy to obtain a pH (specifically, 8 to 13) suitable for bleaching with oxygen-based bleaching agents such as hydrogen peroxide and sodium percarbonate, and reducing bleaching agents such as thiourea dioxide and hydrosulfite, thereby enabling efficient bleaching.

[0033] When hydrogen peroxide is used as a bleaching agent, a hydrogen peroxide stabilizer may be used in combination, if necessary. Examples of the hydrogen peroxide stabilizer include poly-α-hydroxyacrylic acid or a salt thereof, gluconic acid or a salt thereof, and the like, each having a mass-average molecular weight of 2,000 to 1,000,000, particularly 5,000 to 800,000. These salts may be sodium, potassium, or lithium salts.

[0034] (Alkaline treatment agent) In this embodiment, the alkaline treatment agent serves to adjust the initial pH of the treatment solution, and also serves to adjust the pH of the treatment solution to a pH suitable for bleaching when the above-mentioned oxygen bleach or reducing bleach is used as the bleach. In this embodiment, an alkaline treatment agent that does not contain sodium hydroxide is preferably used. This is because sodium hydroxide is a strong alkali, and its use tends to cause greater damage to textile materials. Furthermore, a large amount of neutralizing agent must be used to drain the treatment solution after treatment, which increases the burden on wastewater treatment.

[0035] For example, the alkaline treatment agent may be sodium carbonate (soda ash), sodium bicarbonate (baking soda), sodium percarbonate, etc. The sodium carbonate may be anhydrous or liquid. These alkaline treatment agents release less hydroxide ions than sodium hydroxide, allowing for milder scouring and bleaching treatments that are less damaging to textile materials.

[0036] In this embodiment, amine compounds such as ammonia, monoamines, diamines, triamines, etc. are not used as the alkaline treatment agent because amine compounds have a strong odor and can release an odor during scouring and bleaching treatments, adversely affecting the treatment environment, and unreacted amine compounds can remain in the textile material, emitting an amine odor.

[0037] (processing liquid) The processing solution used in this embodiment is a liquid containing the above-mentioned chelating agent, surfactant, bleaching agent, and alkaline processing agent in a dissolved or dispersed form, and may be prepared by adding these agents to water.

[0038] The treatment solution may be prepared so that its initial pH is 9 to 11. In particular, the initial pH may be prepared so that it is 10 to 11. By keeping the pH within this range, when an oxygen bleach or a reducing bleach is used, the bleaching agent's function can be efficiently exerted, and since the alkalinity is not excessively strong, the amount of neutralizing agent required to neutralize the treatment solution after treatment can be reduced, thereby reducing the burden on wastewater treatment.

[0039] Chelating agents, surfactants, and the like used in preparing the treatment solution are sometimes supplied containing sodium hydroxide to adjust the pH of the agent, but the amount is usually significantly smaller than the amount used in the alkaline treatment agent, and therefore it is acceptable for the sodium hydroxide contained in these agents to be included in the treatment solution.

[0040] Specifically, the treatment liquid may contain the following amounts of each agent per liter of liquid (particularly water) that serves as a solvent or dispersion medium. Chelating agent: for example, 0.2 g / liter to 20 g / liter, preferably 0.3 g / liter to 10 g / liter, more preferably 0.4 g / liter to 5.0 g / liter, particularly preferably 0.5 g / liter to 2.5 g / liter. Surfactant: for example, 0.5 g / liter to 10.0 g / liter, preferably 1.0 g / liter to 5.0 g / liter, particularly 1.5 g / liter to 2.5 g / liter. Bleaching agent: When hydrogen peroxide is used, for example, 3 g / liter to 20 g / liter, particularly 5 g / liter to 15 g / liter. Hydrogen peroxide stabilizer (optional): for example, 1 g / L to 20.0 g / L, particularly 2 g / L to 10.0 g / L. Alkaline treatment agent: for example, 1.0 g / liter to 25.0 g / liter, particularly 5.0 g / liter to 10.0 g / liter.

[0041] In this embodiment, soft water with a hardness of 7°DH or less, particularly 6°DH or less, and more particularly 5°DH or less may be used as the solvent for the treatment solution. If water with high hardness is used in the scouring and bleaching treatments and the subsequent dyeing, hardness components (metal ions (calcium ions, magnesium ions) contained in the water) may combine with surfactants and eliminate their activity, and the hardness components may also promote the aggregation and adhesion of dirt. Therefore, in this embodiment, it is preferable to use water with low hardness. If the hardness of tap water is within the above range, tap water may be used as is. If the hardness of tap water is outside the above range, it is preferable to reduce the hardness using a water softener before using it as the solvent for the treatment solution.

[0042] (Processing conditions, etc.) In this embodiment, the treatment with the treatment solution is carried out by placing the treatment solution in a bath and bringing the textile material into contact with the treatment solution to cause a reaction. The reaction treatment may be carried out, for example, by immersing the textile material in the treatment solution in a bath under conditions of a bath ratio of 1:5 to 1:20, a reaction treatment temperature of 80°C to 110°C, and a reaction treatment time of 20 to 100 minutes, preferably 30 to 60 minutes. The bath ratio may particularly be 1:10 to 1:18, the reaction treatment temperature may particularly be 90°C to 100°C, and the reaction treatment time may particularly be 30 to 45 minutes.

[0043] The treatment with the treatment liquid is preferably carried out in a batch system in a closed space. In the batch system, the treatment liquid is heated to produce vapor in the space, and treatment proceeds even while the fiber material is moving outside the treatment bath, allowing for a relatively short treatment time. Alternatively, a cold batch system or a continuous system may be employed as long as treatment with the treatment liquid proceeds and the desired fiber material is ultimately obtained.

[0044] In this embodiment, the treatment with the treatment solution is carried out in one bath. That is, after the scouring treatment, the bleaching treatment is carried out in one treatment using one type of treatment solution prepared in one treatment bath, without changing the treatment bath or treatment solution (including adding bleaching agents, etc. to the treatment solution after the scouring treatment). Therefore, according to this embodiment, the effort required for scouring and bleaching can be reduced.

[0045] Since the fibrous material treated by the manufacturing method of this embodiment is alkaline, it is preferable to neutralize it with a neutralizing agent. The neutralizing agent is an acid, such as acetic acid, citric acid, or formic acid. Neutralization may be carried out by draining the treatment solution from the treatment bath, then adding an aqueous solution containing the neutralizing agent to the treatment bath, so that the pH of the fibrous material becomes 3.5 to 4.5.

[0046] [Cleaning] After scouring and bleaching with the above-mentioned treatment solution, the textile material is subjected to a washing process. The washing process may be carried out, for example, by draining the treatment solution from the treatment bath in the case of a batch method, or by passing the treated textile material through a squeezing roller in the case of a continuous method, to remove as much liquid as possible from the textile material, and then washing the textile material with water and / or hot water. Water washing refers to washing with water at 20°C to 40°C, and hot water washing refers to washing with hot water at 60°C to 100°C. Water washing and hot water washing may be carried out in combination, in which case the washing process time can be shortened.

[0047] [staining] The manufacturing method of this embodiment may further include a dyeing step. Dyeing is carried out after the treatment with the treatment solution and washing are completed. Dyeing may be carried out by a commonly used method (e.g., a dip dyeing method or a printing method). The type of dye is selected from direct dyes, reactive dyes, sulfur dyes, vat dyes, acid dyes, metal-containing acid dyes, disperse dyes, and cationic dyes, depending on the type of fiber constituting the fiber material. Alternatively, the dyeing step may be carried out by a pigment printing method or a dip dyeing method.

[0048] As described above, in this embodiment, one or both of the chelating agent and surfactant used in the scouring and bleaching treatments can be agents that are also used in cosmetics and foods, thereby providing a textile material that gives consumers a sense of security. In addition, by using at least one selected from the dye, fixing agent, and surfactant used in the soaping process in the dyeing process after the scouring and bleaching treatments as an agent used as a cosmetic ingredient or edible ingredient, it becomes possible to produce textile materials using more of the chemicals used in the production of textile materials as agents that are directly applied to or ingested by the human body, which can give consumers a sense of security.

[0049] Examples of dyes that can be used in the dyeing process and that are also used as cosmetic or edible ingredients are as follows: Dyes: vinyl sulfone type (VS type), triazine type (DCT type, MCT type, MFT type), pyrimidine type (TCP type, DFCP type), and heterogeneous bifunctional types (VS-MFP2 functional group type, VS-MCT2 functional group type, VS-MCT2 functional group type, etc.) that combine these reactive groups, azo type, anthraquinone type, copper formazan type, copper phthalocyanine type Fixing agent: Polyoctanium, sodium carbonate Surfactants: Glucamide, sucrose fatty acid ester, glucoside, propyl betaine, undecylenate, isostearate, oleate, caprate, tholate, behenate, myristate, polyethylene glycol Accelerator: Glauber's salt (sodium sulfate)

[0050] [Other processing steps] The manufacturing method of this embodiment may include other treatment steps instead of or in addition to the dyeing step. The other treatment steps may be, for example, a water-absorbing treatment to impart water absorbency to the textile material, a softening treatment to make the textile material more flexible, or a finishing step such as a functional treatment to impart functionality such as deodorizing, antibacterial, or antiviral properties to the textile material. In these treatment steps, agents that are also used as cosmetic ingredients or edible ingredients may be used, which can provide consumers with a greater sense of security, as explained in relation to the dyeing step.

[0051] The following are water-absorbing agents, softening agents, and antibacterial and / or antiviral agents that are also used as cosmetic ingredients or edible ingredients. Water absorbent: Amino-modified silicone Fabric softener: maltotetraose, alkyltrimethylammonium chloride, polyethylenepolyamine, chitosan Antibacterial and / or antiviral agents: Undecylenic acid monoglyceride, grapefruit seed extract, bamboo extract

[0052] [Effects of this embodiment] In the manufacturing method of this embodiment, a treatment solution containing a chelating agent, a surfactant, a bleaching agent, and an alkaline treatment agent (but not containing sodium hydroxide) is used to carry out the scouring and bleaching treatment of the textile material. It is presumed that the treatment with this treatment solution removes pectin, waxes, fats, and metals that constitute or are attached to the cell walls of the cells that make up the textile material through the following mechanism. -Pectic metals (metals that form complexes with pectin) are removed by being captured by chelating agents. After the metal is removed, the pectin is converted into a water-soluble salt by the alkali treatment agent, which promotes the release of pectin and inhibits its re-adhesion. -Surfactants emulsify and disperse pectin, as well as waxes and fats. In addition, when the bleaching agent is hydrogen peroxide, the chelating agent also functions as a stabilizer for the hydrogen peroxide.

[0053] Furthermore, when the chelating agent is in the form of a sodium salt, this sodium salt, together with the alkaline treatment agent, is thought to contribute to removing pectin from the fiber material, forming a water-soluble salt with sodium, and inhibiting the re-adhesion of pectin. More specifically, when a treatment solution is prepared, chelating agents that are sodium salts tend to release the sodium salt from the chelating agent. The chelating agent from which the sodium salt has been released captures metal salts contained in the primary cell membrane of cellulose. At the same time, the sodium salt released from the chelating agent binds to pectides to produce water-soluble sodium pectate, or reduces the molecular weight of the pectides so that they can be dissolved in water, which is thought to facilitate the removal of pectin. Pectic substances dissolved in water can be effectively removed by surfactants.

[0054] However, these mechanisms are based on speculation and do not limit the manufacturing method of this embodiment in any way.

[0055] In the manufacturing method of this embodiment, the scouring treatment and bleaching treatment can be carried out simultaneously in a single treatment. Therefore, in the manufacturing method of this embodiment, it is not necessary to carry out treatments such as a treatment with a chelating agent and a surfactant (treatment without using a bleaching agent) or a treatment with a bleaching agent and an alkaline treatment agent before or after the above treatments, and the scouring and bleaching treatments can be carried out and completed in a single bath and step. Furthermore, in the manufacturing method of this embodiment, it is possible to scour and bleach the textile material without using an enzyme (i.e., using a treatment solution that does not contain an enzyme), as explained in Patent Document 3.

[0056] Furthermore, in the manufacturing method of this embodiment, when a cosmetic raw material or an edible raw material is used as a processing agent, the manufactured textile material is suitable for forming textile products that come into direct contact with the human body (especially delicate parts of the human body), such as underwear or undergarments, and masks.

[0057] [Fiber material obtained in this embodiment] The fiber material produced by the production method of this embodiment can be provided as one whose residual metal amount measured by IPC spectroscopy, for example, satisfies at least one of the following. Residual magnesium: 150mg / kg or less Calcium residue: 600mg / kg or less

[0058] The residual amount of magnesium may in particular be 150 mg / kg or less, more in particular 100 mg / kg or less, and the residual amount of calcium may in particular be 600 mg / kg or less, more in particular 500 mg / kg or less.

[0059] According to the manufacturing method of this embodiment, a fiber material with a particularly low residual calcium content can be obtained compared to fiber materials obtained by conventional manufacturing methods including a scouring process. Metals remaining in fiber materials tend to inhibit dyeing and cause uneven dyeing. Furthermore, metals remaining in fiber materials tend to adsorb dirt. The amount of residual metal in the fiber material obtained by the manufacturing method of this embodiment is similar to or smaller than the amount of residual metal in fiber materials obtained by conventional manufacturing methods. Therefore, the fiber material obtained by this embodiment is not more susceptible to problems of uneven dyeing or dirt adsorption than conventional materials.

[0060] In the manufacturing method of this embodiment, the scouring process and the bleaching process are carried out simultaneously without using sodium hydroxide, which is strongly alkaline. Therefore, according to this embodiment, neutralization treatment with a strong acid is not necessary, which enables wastewater treatment with less environmental impact and is cost-effective. Furthermore, according to this embodiment, the scouring process can be carried out without using a strong alkali, which can suppress embrittlement and hardening of the fiber material and make the texture of the fiber material soft and smooth. Furthermore, not using sodium hydroxide, which is strongly alkaline, makes it easier to manufacture fiber materials containing protein fibers.

[0061] According to the manufacturing method of this embodiment, the water absorption rate is measured in accordance with JIS L 1907 7.1.1 (water absorption rate, drop method). It is possible to obtain a textile material with a water absorption rate (water absorption rate) of, for example, 0 to 30 seconds, particularly 0 to 10 seconds. Textile materials with such water absorption rate exhibit excellent dyeability. The reason why a textile material with high water absorption rate can be obtained according to this embodiment is thought to be that a single treatment solution contains a chelating agent, a surfactant, a bleaching agent, and an alkaline treatment agent, which synergistically contribute to the removal of not only metals but also oils and greases.

[0062] The water absorption and diffusion area of ​​textile materials measured by the following method is 20cm for woven fabrics. 2 That's 5cm for knitting. 2 It is preferable that it is 10cm or more. 2 More preferably, it is 15cm or more. 2 When the water absorption / diffusion area is in the above range, the water absorption of the fiber material is high and the quick-drying property is also excellent, which is preferable. [Water absorption and diffusion area] The water absorption and diffusion area is measured by dropping 0.2 milliliters of the test liquid (standard water, pH 7) onto the surface of a textile material such as a woven or knitted fabric, and then measuring the wetted and spread area (vertical x horizontal) after 1 minute.

[0063] <Embodiment 2: Fiber Treatment Agent> A fiber treatment agent will be described as a second embodiment of the present disclosure. The fiber treatment agent of this embodiment can be used in the fiber manufacturing method described as the first embodiment, and contains A) a chelating agent, B) a surfactant, and C) an alkaline treatment agent that does not contain sodium hydroxide. When used together with a bleaching agent, the fiber treatment agent of this embodiment makes it possible to simultaneously perform scouring and bleaching treatments in a single bath.

[0064] The chelating agent, surfactant, and sodium hydroxide-free alkali treatment agent that constitute the fiber treatment agent are as described in embodiment 1. These agents may be mixed in proportions such that the concentrations (proportions) when added to the bath are as described in embodiment 1. For example, when the combined mass of the chelating agent, surfactant, and alkali treatment agent is taken as 100%, the chelating agent may be contained in a proportion of 0.57% by mass to 93% by mass, and particularly 3.8% by mass to 28% by mass, the surfactant may be contained in a proportion of 1.1% by mass to 89% by mass, and particularly 11% by mass to 31% by mass, and the alkali treatment agent may be contained in a proportion of 3.2% by mass to 97% by mass, and particularly 50% by mass to 83% by mass.

[0065] The fiber treatment agent of this embodiment, when used in combination with a bleaching agent, allows scouring and bleaching treatments to be carried out simultaneously in a single bath. The bleaching agent may be one of those described in embodiment 1, and hydrogen peroxide may be used in particular. If hydrogen peroxide is mixed with other agents in advance, hydrogen may be generated by reduction of the hydrogen peroxide, destabilizing the entire treatment agent. Therefore, hydrogen peroxide may be prepared separately by the user, or may be contained in a container separate from the fiber treatment agent of this embodiment and provided as a kit together with the fiber treatment agent of this embodiment. Such a kit can also be prepared when using other bleaching agents. [Example]

[0066] The present embodiment will now be described in detail with reference to examples. The following fiber treatment agents were prepared. (chelating agent) 1) IP Chelate D40 (trade name, manufactured by Lion Specialty Chemicals Co., Ltd.): diethylenetriaminepentaacetic acid 2) ALBATEX AD-01 (trade name, sold by Huntsman Japan Co., Ltd.): sodium polyacrylate 3) Dekol SN-S liq (product name, sold by Archroma Japan Co., Ltd.): Acrylic-maleic acid chelate copolymer 4) Chelest CMG-40 (trade name, manufactured by Chelest Co., Ltd.): Tetrasodium L-glutamate diacetate 5) KWB-25 (trade name, manufactured by Senka Corporation): phosphonate 6) HIDS (trade name, manufactured by Nippon Shokubai Co., Ltd.): 3-hydroxy-2,2'iminodisuccinate 7) EDTA (trade name, manufactured by Dojindo Laboratories): ethylenediaminetetraacetate Of 1) to 7), 2), 4), 5), 6), and 7) are cosmetic ingredients.

[0067] (surfactant) 1) Dysurf MOL-744 (trade name, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.): Contains a special surfactant 2) GLUCOPURE DEG (trade name, manufactured by Clariant): lauroyl methyl glucamide 3) Pitchlan L-100 (trade name, manufactured by Nicca Chemical Co., Ltd.): a nonionic / anionic surfactant containing poly(oxyethylene) alkyl ether (C=12-15). 4) Sunmol BH230 (trade name, manufactured by Nicca Chemical Co., Ltd.): a nonionic / anionic surfactant containing poly(oxyethylene) alkyl ether (C=12-15). 5) Liporan LJ-441 (trade name, manufactured by Lion Specialty Chemicals Co., Ltd.): α-olefin sulfonate 6) Chemical Free Core (product name, manufactured by Rakuto Kasei Co., Ltd.): sucrose fatty acid ester Of 1) to 6), 2), 5), and 6) are cosmetic ingredients.

[0068] (bleach) Hydrogen peroxide (35%) (Kishida Chemical Co., Ltd.) (Hydrogen peroxide stabilizer) Neolate PLC7000 (product name, manufactured by Nicca Chemical Co., Ltd.): A hydrogen peroxide stabilizer containing a polycarboxylic acid polymer (Alkaline treatment agent 1: For normal scouring treatment) Sodium hydroxide (flakes) (Hayashi Pure Chemical Industries, Ltd.) (Alkaline treatment agent 2) Sodium carbonate (Kanto Chemical Co., Ltd.)

[0069] (Example 1-1) Knitted fabric made of cotton yarn (30s jersey, 140g / m 2 ) was prepared. Water was poured into the treatment bath, and the knitted fabric was thoroughly wetted with water. The chelating agent, surfactant, bleach, and alkaline treatment agent shown in Table 1 were then added to the treatment bath in the proportions shown in Table 1 to obtain a treatment solution. The initial pH of the treatment solution was 10.6. Treatment was performed with a bath ratio of 1:15, a treatment bath temperature of 95°C, and a treatment time of 30 minutes. The pH of the treatment solution after treatment was 10.3. The knitted fabric was treated using a pot dyeing machine (product name UR-MINI-COLOR MCUR-V5-6N, manufactured by Texam Giken Co., Ltd.). The knitted fabric and treatment solution were placed in a 440cc pot, and the pot was repeatedly rotated in a sealed state. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, and then dehydrated and dried.

[0070] (Examples 1-2 to 1-5) The prepared knitted fabrics were treated and then neutralized and washed with hot water in the same manner as in Example 1-1, except that the types and proportions of the chelating agent, surfactant, bleaching agent, and alkaline treatment agent added to the treatment bath were as shown in Table 1. The initial and post-treatment pH of the treatment solution used in each example was as shown in Table 1.

[0071] (Comparative Example 1-1) Knitted fabric made of cotton yarn (30s jersey, 140g / m 2 ) was prepared. Water was poured into the treatment bath, and the knitted fabric was thoroughly wetted with water. The surfactants shown in Table 1, as well as the bleaching agent and alkaline treatment agent, were added to the treatment bath in the proportions shown in Table 1, without adding a chelating agent, to obtain a treatment solution. The initial pH of the treatment solution was 11.5. Treatment was carried out with a bath ratio of 1:15, a treatment bath temperature of 95°C, and a treatment time of 30 minutes. The pH of the treatment solution after treatment was 11.4. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, and then dehydrated and dried.

[0072] (Comparative Example 1-2) The prepared knitted fabric was treated in the same manner as in Comparative Example 1-1, except that the types and proportions of surfactants were as shown in Table 1, a hydrogen peroxide stabilizer was added to the treatment bath in the proportions shown in Table 1, and the treatment time was 45 minutes. After treatment, the knitted fabric was neutralized and washed with hot water, and then dehydrated and dried.

[0073] The whiteness, water absorbency, and amount of residual metal of the knitted fabrics obtained in Examples 1-1 to 1-5 and Comparative Examples 1-1 and 1-2 were measured. The results are shown in Table 1.

[0074] [Table 1]

[0075] The whiteness, water absorbency, and amount of residual metal were measured according to the following procedures. <Color scale, whiteness> The color scale was measured in accordance with JIS L 0801:2011 General rules for testing color fastness and JIS L 0805:2005 Gray scale for staining. Furthermore, Hunter whiteness (D65) was measured using a spectrophotometer (trade name CD100, manufactured by Yokogawa Meter & Instruments Co., Ltd.).

[0076] <Water absorption: water absorption rate> According to JIS L1907:2010 7.1.1 (water absorption rate dropping method), the time (seconds) until water dropped onto the sample was absorbed was measured. <Water absorption: diffusion area> After 0.2 ml of water is dropped onto the sample, the area (cm) of the wetted part of the sample is measured after 1 minute. 2 ) was sought.

[0077] <Residual metal amount> Pretreatment (decomposition and solution of knitted fabric) was performed according to EPA3052 (microwave wet decomposition method), and approximately 0.2 g of the extracted sample was randomly sampled, weighed, and used as a test specimen. Next, 8 mL of nitric acid was added for hydrolysis, and the volume was adjusted with water. The content was then quantified by ICP atomic emission spectroscopy. The iCAP RG manufactured by Thermo Fisher Scientific was used for quantification.

[0078] (Examples 1 to 6) Knitted fabric made of cotton yarn (30s jersey, 140g / m 2 ) was prepared. Water with a hardness of 5°DH was placed in the treatment bath, and the knitted fabric was thoroughly wetted with the water. Then, the following were added to the treatment bath: 2 g / L of the chelating agent (chelating agent 4), 2 g / L of the surfactant (surfactant 2), 10.0 g / L of the hydrogen peroxide (bleaching agent), and 8.0 g / L of the alkaline treatment agent (alkaline treatment agent 2) to obtain a treatment solution. The initial pH of the treatment solution was 10.4. Treatment was carried out at a bath ratio of 1:15, at a treatment bath temperature of 95°C, and for 30 minutes. The pH of the treatment solution after treatment was 10.4. The knitted fabric was treated using a pot dyeing machine (product name UR-MINI-COLOR MCUR-V5-6N, manufactured by Texam Giken Co., Ltd.). The knitted fabric and treatment solution were placed in a 440cc pot, which was then sealed and repeatedly rotated. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, and then dehydrated and dried.

[0079] (Examples 1-7 to 1-10) The prepared knitted fabrics were treated in the same manner as in Example 1-6, except that the types and proportions of the chelating agent, surfactant, bleaching agent, and alkaline treatment agent added to the treatment bath were as shown in Table 1-2, and then the knitted fabrics were neutralized and washed with hot water. The initial and post-treatment pH of the treatment solution used in each Example was as shown in Table 1-2.

[0080] The whiteness, water absorbency, and residual metal content of the knitted fabrics obtained in Examples 1-6 to 1-10 were measured. The results are shown in Table 1. For Examples 1-6 to 1-10, the whiteness was measured by the method specified in JIS L1916. The whiteness of Comparative Example 1-1, measured by the same method, is shown in Table 1-2 together with other physical properties.

[0081] [Table 1-2]

[0082] As shown in Tables 1 and 1-2, the Hunter whiteness or whiteness of the knitted fabrics obtained in each Example, in which a chelating agent was used but no sodium hydroxide was used, was almost equivalent to that of the knitted fabrics obtained in the Comparative Example, in which sodium hydroxide was used, and there was no effect on dyeability. Each Example exhibited water absorption equivalent to or superior to that of the Comparative Example. The slow water absorption rate of Comparative Example 1 is thought to be due to the presence of some residual metal salts and oils (pectin, wax). Furthermore, the amount of Ca remaining in the knitted fabrics obtained in each Example was significantly smaller than that of the knitted fabric in Comparative Example 2, demonstrating that treatment with a chelating agent is effective in removing Ca. The amount of residual Mg in the knitted fabrics obtained in each Example was almost equivalent to that of the knitted fabric in Comparative Example 2. These results demonstrate that the use of a chelating agent makes it possible to obtain practical fiber materials without using sodium hydroxide.

[0083] Furthermore, the surfaces of the fiber materials (knitted fabrics) obtained in Examples 1-4, 1-5, and 1-6 were observed at a magnification of 2500x using an electron microscope (3D Real Surface View Microscope VE-9800 (product name), manufactured by Keyence Corporation). SEM images of each Example are shown in Figures 4 to 6, respectively. Additionally, an SEM image of the surface of an unscouring-bleached knitted fabric is shown in Figure 7 for comparison. In comparison with Figure 7, no impurities present on the surface of the fibers as seen in Figure 7 were observed in the fiber materials of the Examples, demonstrating that scouring and bleaching were carried out effectively in each Example.

[0084] The textile materials (knitted fabrics) obtained in Examples 1-7 to 1-10 were obtained by scouring and bleaching using only agents that are also used as cosmetic raw materials, and as textile products, they exhibit absorbency and whiteness that are equal to or better than conventional textiles, while providing users with a sense of security.They are also expected to be easily accepted by users who do not like scouring and bleaching using strong alkalis, and are therefore expected to be used in a variety of applications.In particular, Example 1-9 had a large diffusion area and a small amount of residual metal, indicating that scouring and bleaching were carried out effectively.

[0085] Example 2-1 A 30-count blend of 80% cotton and 20% wool was used to knit a fabric (30s jersey, 87g / m²) on a single-knitting machine. 2 ) was prepared. Water was poured into the treatment bath, and the knitted fabric was thoroughly wetted with water. The chelating agent, surfactant, bleaching agent, and alkaline treatment agent shown in Table 2 were then added to the treatment bath in the proportions shown in Table 2 to obtain a treatment solution. The initial pH of the treatment solution was 10.03. Treatment was carried out with a bath ratio of 1:15, a treatment bath temperature of 95°C, and a treatment time of 30 minutes. The pH of the treatment solution after treatment was 9.97. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, dehydrated, and dried. The knitted fabric was then subjected to a dyeing treatment.

[0086] The dyeing process used a dye solution containing 0.5% owf Kayanol Milling Blue 2RW (product name, Nippon Kayaku Co., Ltd., blue acid dye) and 1.5 g / L of acetic acid. The dyeing process consisted of immersing the knitted fabric in the dye solution at 100°C for 40 minutes, followed by a soaping process, rinsing with hot and cold water, and spin-drying. This dyeing process was carried out to dye only the wool.

[0087] (Comparative Example 2-1) A 30-count blend of 80% cotton and 20% wool was used to knit a fabric (30s jersey, 87g / m²) on a single-knitting machine. 2) was prepared. Water was poured into the treatment bath, and the knitted fabric was thoroughly wetted with water. The surfactants shown in Table 2, as well as the bleaching agent and alkaline treatment agent, were added to the treatment bath in the proportions shown in Table 2, without adding a chelating agent, to obtain a treatment solution. The initial pH of the treatment solution was 11.01. Treatment was carried out with a bath ratio of 1:15, a treatment bath temperature of 95°C, and a treatment time of 30 minutes. The pH of the treatment solution after treatment was 10.55. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, and then dehydrated and dried. Furthermore, the dehydrated and dried knitted fabric was dyed in the same manner as in Example 1-1.

[0088] (Reference example) A knitted fabric was obtained in the same manner as in Example 2-1, except that the bleaching agent and alkaline treating agent were not added to the treating solution.

[0089] For the knitted fabrics obtained in Example 2-1 and Comparative Example 2-1, the mass (gray fabric mass) before treatment with a treatment solution containing a chelating agent or sodium hydroxide, the mass after treatment with the treatment solution (post-treatment mass), and the mass after dyeing (post-dyeing mass) were measured. From these measurements, the reduction rate of the post-treatment mass relative to the greige fabric mass and the reduction rate of the dyed mass relative to the greige fabric mass were calculated. Furthermore, for the knitted fabrics obtained in Example 2-1 and Comparative Example 2-1, the cotton / wool blend ratio was calculated in accordance with JIS L 1030:2012. Furthermore, the surfaces of the knitted fabrics obtained in Example 2-1 and Comparative Example 2-1 and the knitted fabric of the Reference Example were observed at 100x magnification using an optical microscope (Digital Microscope VHX-2000 (product name), manufactured by Keyence Corporation) to confirm the remaining state of dyed fibers (wool). The results are shown in Table 2 and Figures 1 to 3.

[0090] [Table 2]

[0091] As shown in Table 2, in Example 2-1, the reduction rates of the post-treatment mass and post-dye mass relative to the green fabric mass were both small. In contrast, the mass reduction rate was considerably large in Comparative Example 2-1. Furthermore, observation with an optical microscope revealed that a relatively large amount of dyed yarn (wool) remained in Example 2-1, and was comparable to that of the knitted fabric prepared as a reference example (not subjected to the action of the alkali treatment agent). On the other hand, in Comparative Example 2-1, almost no dyed fiber (wool) was observed, which is thought to have dissolved during treatment. From these findings, it was found that treatment using a chelating agent without using sodium hydroxide can effectively suppress damage to protein fibers.

[0092] (Example 3-1) The production of fiber materials was carried out on a scale up under the same conditions as in Example 1-1. Specifically, two types of knitted fabrics (30s jersey (140 g / m2)) made of cotton yarn were used. 2 ) and 20s jersey (weight 187g / m 2 )) were prepared in 5 m lengths. Water was poured into the treatment bath, and the knitted fabric was thoroughly wetted. The chelating agent, surfactant, bleach, alkaline treatment agent, and stabilizer shown in Table 3 were then added to the treatment bath in the proportions shown in Table 3 to obtain a treatment solution. The initial pH of the treatment solution was 10.2. Treatment was carried out with a bath ratio of 1:15, a bath temperature of 95°C, and a treatment time of 30 minutes. The pH of the treatment solution after treatment was 10.1. The knitted fabric was treated using a small high-pressure dyeing machine (20 kg capacity) manufactured by TSE. The knitted fabric and treatment solution were added, and the treatment was carried out while the knitted fabric was transported through the dyeing machine. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, and then dehydrated and dried.

[0093] (Example 3-2) The production of fiber materials was carried out on a scale up under the same conditions as in Examples 1-4. Specifically, two types of knitted fabrics (30s jersey (140 g / m2)) made of cotton yarn were used. 2 ) and 20s jersey (weight 187g / m 2) were prepared in 5 m lengths. Water was poured into the treatment bath, and the knitted fabric was thoroughly wetted. The chelating agent, surfactant, bleach, alkaline treatment agent, and stabilizer shown in Table 3 were then added to the treatment bath in the proportions shown in Table 3 to obtain a treatment bath. The initial pH of the treatment solution was 10.1. Treatment was performed with a bath ratio of 1:15, a bath temperature of 95°C, and a treatment time of 30 minutes. The pH of the treatment solution after treatment was 10.0. The knitted fabric was treated using a small high-pressure dyeing machine (20 kg capacity) manufactured by TSE. After the treatment, the knitted fabric and treatment solution were added, and the treatment was carried out while the knitted fabric was transported through the dyeing machine. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, and then dehydrated and dried.

[0094] (Comparative Example 3-1) Two types of knitted fabrics made from cotton yarn (30s jersey (130g / m 2 ) and 20s twisted jersey (weight 250g / m 2 )) were prepared in 20 m lengths. Water was poured into the bath, and the knitted fabric was thoroughly wetted. The surfactant, bleach, alkaline treatment agent, and stabilizer shown in Table 3 were then added to the treatment bath in the proportions shown in Table 3 to obtain a treatment bath. The treatment was carried out at a bath ratio of 1:10, with a treatment bath temperature of 95°C and a treatment time of 45 minutes. The knitted fabric was treated using a small high-pressure dyeing machine (capacity 20 kg) manufactured by TSE Corporation. After the knitted fabric and treatment solution were added, the treatment was carried out while the knitted fabric was transported through the dyeing machine. After treatment, the knitted fabric was neutralized with acid, washed in hot water at 95°C, and then dehydrated and dried.

[0095] The whiteness, water absorbency, water absorption and diffusibility, water absorption rate and residual metal salts of the knitted fabrics obtained in Examples 3-1 and 3-2 and Comparative Example 3-1 were measured. The results are shown in Table 3. The water absorption rate was measured by the following method.

[0096] <Water absorption: wicking test> A sample measuring approximately 200 mm x 25 mm in the wale and course directions was prepared according to JIS L1907:2010.7.1.2 (Byreck method). The sample was lowered so that the course direction was parallel to the water surface, and the bottom edge of the sample was immersed 20 mm ± 2 mm into a tank of water and left for 10 minutes. After leaving it, the height of the sample due to capillary action was measured to a scale of 1 mm.

[0097] [Table 3]

[0098] As shown in Table 3, the Hunter whiteness of the knitted fabrics obtained in each example using a chelating agent but not sodium hydroxide in the scaled-up treatment was approximately equivalent to that of Examples 1-1 and 1-4, which used a smaller treatment machine, and also approximately equivalent to that of the knitted fabric obtained in the comparative example, which used sodium hydroxide. Each example exhibited water absorbency equivalent to that of the comparative example. Furthermore, the amount of Ca remaining in the knitted fabrics obtained in each example was significantly smaller than that of the knitted fabric in Comparative Example 3, and was also significantly smaller than that of Examples 1-1 and 1-4, which used a smaller treatment machine. This is presumably because the knitted fabric was circulated in the treatment machine, allowing the chelating agent to act efficiently and remove Ca. Furthermore, the amount of residual Mg was approximately equivalent to or smaller than that of Comparative Example 3-1, presumably indicating that Mg, like Ca, was also efficiently removed by the chelating agent. These results show that the chelating agent works effectively even in scaled-up treatment, and that practical fiber materials can be obtained without using sodium hydroxide, and that the amount of residual Ca can be reduced in particular.

[0099] Example 4-1 The textile materials obtained in Examples 1-6 were subjected to a dyeing process. In the dyeing process, a dye solution (solvent: water with a hardness of 5°DH) containing the agents shown in Table 4 in the amounts shown in Table 4 was used. The dyeing process consisted of immersing the knitted fabric in the dye solution at 60°C for 60 minutes, soaping, rinsing with hot water and cold water, and dehydrating and drying, in this order. In the soaping process, polyethylene glycol (trade name: Scoreol TS801C (manufactured by Kitahiro Chemical Co., Ltd.)), a cosmetic raw material, was used as the soaping agent (surfactant).

[0100] (Examples 4-2 to 4-3) The fiber material obtained in Example 1-6 was subjected to a dyeing process in the same manner as in Example 4-1, except that the types of dyes used were as shown in Table 4. The trade names of the dyes used in Examples 4-1 to 4-3 are as follows: Yellow dye: Product name: Kayacion Yellow CF-COMJ, manufactured by Nippon Kayaku Co., Ltd. Red dye: Product name: Kayacion Red CF-COMJCOMJ, manufactured by Nippon Kayaku Co., Ltd. Blue dye: Product name: Kayacion Blue CF-COMJ, manufactured by Nippon Kayaku Co., Ltd. All of the above dyes are cosmetic raw materials.

[0101] The weather fastness, washing fastness, and rubbing fastness of the fiber materials obtained in Examples 4-1 to 4-3 were evaluated. The evaluation results are shown in Table 4. The weather fastness, washing fastness, and rubbing fastness were evaluated according to JIS L 0842 Grade 4, JIS L 0844 A-2, and JIS L 0849 II, respectively.

[0102] [Table 4]

[0103] As shown in Table 4, even when the textile material of this example was obtained as a dyed product, the obtained textile material had no practical problems. In other words, it was found that when textile materials were treated with an alkaline treatment agent that did not contain a chelating agent, surfactant, bleaching agent, or sodium hydroxide, the subsequent dyeing process was not affected, and dyed products similar to those obtained when ordinary scouring and bleaching treatments were performed were obtained.

[0104] (Example 5-1) The textile material obtained in Example 1-1 was subjected to an antibacterial treatment. The antibacterial treatment was carried out by heating the textile material in a treatment solution at 50°C for 20 minutes using a treatment solution prepared by mixing an air-containing carboxylic acid compound (trade name Amorden CPC-54, manufactured by Yamato Chemical Industry Co., Ltd.) as an antibacterial agent with water to a concentration of 3% by mass. The antibacterial agent used here is also used as a cosmetic ingredient.

[0105] The antibacterial activity values ​​of the fiber materials obtained in Examples 5-1 and 5-2 were determined after 0 washes and after 10 washes. The results are shown in Table 5. The antibacterial activity value was measured in accordance with JIS L 1902.

[0106] [Table 5]

[0107] This embodiment includes the following aspects. (Aspect 1) A method for producing a fiber material containing at least one selected from natural fibers and regenerated cellulose fibers, comprising: Preparing a textile material for scouring and bleaching treatment; treating the textile material with a treatment solution containing 1) a chelating agent, 2) a surfactant, 3) a bleaching agent, and 4) an alkaline treatment agent not containing sodium hydroxide, and having an initial pH of 9 to 11; A method for producing a fiber material, comprising: (Aspect 2) 2. The method for producing a fiber material according to aspect 1, wherein the treatment liquid contains the chelating agent in an amount of 0.3 g / L or more and 20.0 g / L or less per 1 liter of soft water as a solvent. (Aspect 3) 3. The method for producing a fiber material according to claim 1 or 2, wherein the chelating agent is at least one selected from the group consisting of aminocarboxylic acid chelating agents, polyacrylic acid chelating agents, phosphonic acid chelating agents, dicarboxylic acid chelating agents, gluconic acid chelating agents, and acrylic acid / maleic acid copolymer chelating agents. (Aspect 4) A method for producing a fiber material according to aspect 3, wherein the aminocarboxylic acid chelating agent is at least one selected from the group consisting of ethylenediaminetetraacetic acid and salts thereof, diethylenetriaminepentaacetic acid and salts thereof, and glutamic acid diacetic acid and salts thereof. (Aspect 5) A method for producing a fiber material according to aspect 3, wherein the aminocarboxylic acid chelating agent is at least one selected from the group consisting of sodium salt of ethylenediaminetetraacetic acid, sodium salt of diethylenetriaminepentaacetic acid, and sodium salt of glutamic acid diacetic acid. (Aspect 6) A method for producing a fiber material according to any one of Aspects 1 to 5, wherein the surfactant is at least one selected from a nonionic surfactant and an anionic surfactant. (Aspect 7) Aspect 7. The method for producing a fiber material according to any one of Aspects 1 to 6, wherein the alkali treatment agent is at least one selected from sodium carbonate, sodium bicarbonate, and sodium percarbonate. (Aspect 8) Aspect 8. The method for producing a textile material according to any one of aspects 1 to 7, wherein the bleaching agent is hydrogen peroxide. (Aspect 9) A method for producing a textile material according to any one of aspects 1 to 8, wherein the treatment of the textile material with the treatment liquid comprises placing the treatment liquid in a bath and immersing the textile material in the treatment liquid under conditions of a bath ratio of 1:5 to 1:20, a treatment temperature of 80°C to 110°C, and a treatment time of 20 minutes to 100 minutes. (Aspect 10) A method for producing a fiber material according to any one of Aspects 1 to 9, wherein one or both of the chelating agent and the surfactant are cosmetic raw materials and / or edible raw materials. (Aspect 11) 11. The method for producing a fiber material according to claim 10, wherein the chelating agent is at least one selected from trisodium methylglycine diacetate, sodium polyacrylate, sodium metaphosphate, 1-hydroxyethylidene-1,1-diphosphonic acid, and tetrasodium 3-hydroxy-2.2'-iminodisuccinate. (Aspect 12) 12. The method for producing a fiber material according to aspect 10 or 11, further comprising a dyeing step, wherein at least one selected from the group consisting of a dyeing agent and a fixing agent used in the dyeing step and a surfactant used in the soaping step is a cosmetic raw material and / or an edible raw material. (Aspect 13) The method further includes at least one finishing step selected from a water-absorbing processing step using a water-absorbing agent, a softening processing step using a softener, and a functional processing step using a functional agent, The water-absorbing agent, the softening agent, and the functional agent are cosmetic raw materials and / or edible raw materials. A method for producing a fiber material according to any one of aspects 10 to 12. (Aspect 14) A textile material comprising at least one selected from natural fibers and regenerated cellulose fibers, wherein the amount of residual metals measured by IPC spectroscopy satisfies at least one of the following: Residual magnesium: 150mg / kg or less Calcium residue: 600mg / kg or less (Aspect 15) A textile treatment agent comprising A) a chelating agent, B) a surfactant, and C) an alkaline treatment agent that does not contain sodium hydroxide, and which, when used together with a bleaching agent, enables scouring and bleaching treatments to be carried out simultaneously in a single bath. (Aspect 16) the chelating agent is at least one selected from an aminocarboxylic acid chelating agent, a polyacrylic acid chelating agent, an acrylic acid / maleic acid copolymer chelating agent, a phosphonic acid chelating agent, a dicarboxylic acid chelating agent, and a gluconic acid chelating agent; the surfactant is at least one selected from a nonionic surfactant and an anionic surfactant, The alkaline treatment agent is at least one selected from sodium carbonate, sodium bicarbonate, and sodium percarbonate. The fiber treatment agent of embodiment 15. (Aspect 17) The fabric treatment agent according to embodiment 15 or 16, wherein the bleaching agent is hydrogen peroxide and is used for hydrogen peroxide bleaching treatment. (Aspect 18) A fiber treatment kit, in which the fiber treatment agent according to any one of aspects 15 to 17 is contained in one container, and a bleaching agent is contained in a container separate from the fiber treatment agent. [Industrial Applicability]

[0108] According to the manufacturing method of this embodiment, it is possible to obtain a fiber material from which impurities have been removed without using strongly alkaline sodium hydroxide. This embodiment can also be applied to fiber materials containing animal fibers. Therefore, this embodiment is useful as a method for manufacturing various fiber materials.

Claims

1. A method for producing a fiber material containing at least one selected from natural fibers and regenerated cellulose fibers, comprising: Preparing a textile material for scouring and bleaching treatment; treating the textile material with a treatment solution containing 1) a chelating agent, 2) a surfactant, 3) a bleaching agent, and 4) an alkaline treatment agent that does not contain sodium hydroxide or an amine compound, and having an initial pH of 9 to 11; Including, the bleaching agent is sodium dichloroisocyanurate, potassium dichloroisocyanurate, sodium percarbonate, sodium perborate, or hydrogen peroxide; the surfactant is at least one surfactant selected from nonionic surfactants, the chelating agent is at least one selected from an aminocarboxylic acid chelating agent, a polyacrylic acid chelating agent, a phosphonic acid chelating agent, a dicarboxylic acid chelating agent, a gluconic acid chelating agent, and an acrylic acid / maleic acid copolymer chelating agent; The treatment solution does not contain enzymes. A method for producing textile materials.

2. 2. The method for producing a fiber material according to claim 1, wherein the treatment liquid contains the chelating agent in an amount of 0.3 g / L or more and 20.0 g / L or less per liter of soft water as a solvent.

3. 2. The method for producing a fiber material according to claim 1, wherein the aminocarboxylic acid chelating agent is at least one selected from the group consisting of ethylenediaminetetraacetic acid and its salts, diethylenetriaminepentaacetic acid and its salts, and glutamic acid diacetic acid and its salts.

4. 2. The method for producing a fiber material according to claim 1, wherein the aminocarboxylic acid chelating agent is at least one selected from the group consisting of sodium salt of ethylenediaminetetraacetic acid, sodium salt of diethylenetriaminepentaacetic acid, and sodium salt of glutamic acid diacetic acid.

5. The method for producing a fiber material according to any one of claims 1 to 4, wherein the surfactant is at least one selected from glucamide surfactants.

6. The method for producing a fiber material according to any one of claims 1 to 5, wherein the alkaline treatment agent is at least one selected from the group consisting of sodium carbonate, sodium bicarbonate, and sodium percarbonate.

7. The method for producing a textile material according to any one of claims 1 to 6, wherein the bleaching agent is hydrogen peroxide.

8. The method for producing a textile material according to any one of claims 1 to 7, wherein the treatment of the textile material with the treatment liquid comprises placing the treatment liquid in a bath and immersing the textile material in the treatment liquid under conditions of a bath ratio of 1:5 to 1:20, a treatment temperature of 80°C to 110°C, and a treatment time of 20 minutes to 100 minutes.

9. The method for producing a fiber material according to any one of claims 1 to 8, wherein one or both of the chelating agent and the surfactant are cosmetic raw materials and / or edible raw materials.

10. 10. The method for producing a fiber material according to claim 9, wherein the chelating agent is at least one selected from the group consisting of trisodium methylglycine diacetate, sodium polyacrylate, 1-hydroxyethylidene-1,1-diphosphonic acid, and tetrasodium 3-hydroxy-2,2'-iminodisuccinate.

11. 11. The method for producing a fiber material according to claim 9 or 10, further comprising a dyeing step, wherein at least one selected from the group consisting of a dyeing agent and a fixing agent used in the dyeing step and a surfactant used in the soaping step is a cosmetic raw material and / or an edible raw material.

12. The method further includes at least one finishing step selected from a water-absorbing processing step using a water-absorbing agent, a softening processing step using a softener, and a functional processing step using a functional agent, The water-absorbing agent, the softening agent, and the functional agent are cosmetic raw materials and / or edible raw materials. The method for producing the fiber material according to any one of claims 9 to 11.

13. A fiber treatment agent comprising: A) a chelating agent; B) a surfactant; and C) an alkaline treatment agent that does not contain sodium hydroxide or an amine compound, and that, when used together with a bleaching agent, enables scouring and bleaching treatments to be carried out simultaneously in one bath; the bleaching agent is sodium dichloroisocyanurate, potassium dichloroisocyanurate, sodium percarbonate, sodium perborate, or hydrogen peroxide; the surfactant is a nonionic surfactant, the chelating agent is at least one selected from an aminocarboxylic acid chelating agent, a polyacrylic acid chelating agent, a phosphonic acid chelating agent, a dicarboxylic acid chelating agent, a gluconic acid chelating agent, and an acrylic acid / maleic acid copolymer chelating agent; Does not contain enzymes Fiber treatment agent.

14. The alkaline treatment agent is at least one selected from sodium carbonate, sodium bicarbonate, and sodium percarbonate. The fiber treatment agent according to claim 13.

15. The fiber treatment agent according to claim 13 or 14, which is for hydrogen peroxide bleaching treatment, and wherein the bleaching agent is hydrogen peroxide.

16. A textile treatment kit, comprising the textile treatment agent according to any one of claims 13 to 15 contained in one container and a bleaching agent contained in a container separate from the textile treatment agent.

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