Method for manufacturing textile products containing functional components extracted from defatted rice bran

Abstract

This invention provides textile products that utilize defatted rice bran, a food waste, to extract the rice polyphenol components contained within it, fix them to textile products, and impart the antioxidant, moisturizing, and antibacterial properties of the rice polyphenol components. [Solution] The present invention provides a textile product in which rice polyphenol components contained in defatted rice bran are extracted and applied to fibers, thereby exhibiting the functionality, antioxidant properties, moisturizing properties, and antibacterial properties of the applied rice polyphenol components, and the expression of these functional properties can be confirmed by measurement and evaluation. The present invention provides a textile product in which the above-mentioned rice polyphenol components are applied to fibers by either a method of preparing a fiber processing agent with rice polyphenol components as the main component and applying it to the textile product by ancillary processing, or a method of using a mordant to bind the fibers and rice polyphenol components together.

Description

Technical Field

[0001] This invention relates to a fiber product to which a polyphenol component, which is a functional component extracted from defatted rice bran that has been conventionally discarded as food residue, is imparted to fibers, and a method for manufacturing the fiber product.

Background Art

[0002] In recent years, products using functional components derived from natural raw materials have been emerging from the perspectives of SDGs, carbon neutrality, and sustainability. In particular, products using rice bran have attracted attention not only for conventional food uses but also for beauty uses such as lotion. Products using rice bran utilize the antioxidant, moisturizing, and antibacterial properties of the polyphenol component contained in rice bran, and technologies for applying this component to fiber products have been studied.

[0003] Patent Document 1 discloses antioxidant and antibacterial fibers using deacetylated chitosan to which polyphenols are attached. According to the fibers of Patent Document 1, it is said that fibers excellent not only in antioxidant and antibacterial properties but also in washing durability can be provided.

[0004] Patent Document 2 discloses rayon fibers to which rice oil and rice oil components are emulsified and added as active ingredients. According to Patent Document 2, it is said that fibers having both sustained release properties and wash resistance can be provided.

[0005] Patent Document 3 discloses aliphatic polyester fibers and polylactic acid fibers in which a lipophilic moisturizer containing oil extracted from rice and an antioxidant skin conditioner containing polyphenols are fixed with a binder. According to Patent Document 3, it is said that fibers with little physical irritation to the skin and excellent touch that can restore the reduced skin resistance can be provided.

[0006] However, the technology described in Patent Document 1 merely uses a special fiber formed from deacetylated chitosan and utilizes polyphenol components such as catechin as auxiliary components for the antioxidant and antibacterial properties of chitosan. It cannot be said that the technology primarily utilizes the effects and benefits of polyphenol components.

[0007] The technology described in Patent Document 2 involves a fiber made by adding an additive to rayon, which has moisture-absorbing and releasing properties. However, the examples do not include a comparison between the presence and absence of the additive, making it difficult to determine whether the effect is due to the moisturizing properties of rayon or to the added rice oil and rice oil-containing components. Furthermore, there is no description confirming whether the added components actually remain within the rayon fibers, making it difficult to determine whether the effects and benefits obtained by this technology are due to the added rice oil and rice oil-containing components.

[0008] The technology described in Patent Document 3 demonstrates the effects on the skin of using a combination of a lipophilic moisturizer and an antioxidant skin conditioner. However, upon reviewing the examples, it becomes clear that the manufacturing method of the fabric, including the fibers used, plays a major role in improving rough skin, while the lipophilic moisturizer and antioxidant skin conditioner are merely auxiliary components.

[0009] Furthermore, while it is required that the functional effects of the functional components in the textile products manufactured according to Patent Documents 1 to 3 be measured or reliably verified after manufacturing and that they be reliably expressed, Patent Documents 1 to 3 do not clearly disclose this, and currently it is not possible to ensure the stability of imparting functionality to textile products.

[0010] In other words, there is currently a need for the development of textile products that can be confirmed to utilize polyphenol components found in rice bran, which is used in lotions and other cosmetics, as a major functional ingredient.

[0011] Furthermore, in recent years, various food waste recycling initiatives have been promoted from the perspectives of SDGs, carbon neutrality, and sustainability. Major initiatives include conversion into animal feed and composting, with the aim of reducing processing costs and CO2 emissions generated during incineration.

[0012] The use of food waste in textile products is currently limited to dyes extracted from fruit and vegetable pulp or peels after juice extraction. However, these dyes are less durable than those used in regular textile products, and lack stability in color development and repeatability. As a result, these products have not become widely adopted, and the current situation is far from contributing to the environment through the use of food waste. [Prior art documents] [Patent Documents]

[0013] [Patent Document 1] Japanese Patent Publication No. 2008-156787 [Patent Document 2] Japanese Patent Publication No. 2007-314914 [Patent Document 3] Japanese Patent Publication No. 2005-113304 [Overview of the project] [Problems that the invention aims to solve]

[0014] This invention was made in view of the current situation, and aims to provide a textile product and a method for producing the same, which utilize defatted rice bran, a food waste, to extract the polyphenol components contained therein (hereinafter referred to as rice polyphenol components), fix them to a textile product, and impart the antioxidant, moisturizing, and antibacterial properties of the rice polyphenol components.

[0015] Defatted rice bran is the residue left after extracting rice oil from rice bran, and is currently used in livestock feed and soil conditioners. However, only a small portion of defatted rice bran is used in livestock feed and soil conditioners, and the majority is discarded, posing an environmental challenge. The inventors of this invention focused on the fact that defatted rice bran contains rice polyphenol components that can be used as functional ingredients. The present invention aims to provide a textile product that can reduce waste and thus reduce environmental impact by effectively utilizing defatted rice bran. [Means for solving the problem]

[0016] The inventors of this invention, after diligently studying to solve the above problems, arrived at the present invention and completed it.

[0017] In other words, the gist of this invention is as follows: The present invention relates to a textile product in which rice polyphenol components contained in defatted rice bran, a food waste, are extracted, the extracted rice polyphenol components are applied to fibers, and the functional properties of the applied rice polyphenol components, such as antioxidant, moisturizing, and antibacterial properties, are expressed, and the expression of these functional properties can be measured and confirmed. The present invention relates to a textile product to which rice polyphenol components extracted from defatted rice bran, a food waste, have been imparted to the fibers by either a method of preparing a fiber processing agent with rice polyphenol components as the main component and applying it to the textile product by an ancillary processing method, or a method of using a mordant to bond the fibers and rice polyphenol components via the mordant.

[0018] The detailed gist of this invention is as follows: Claim 1 A textile product characterized by having a rice polyphenol component, a functional component extracted from defatted rice bran, applied to the fibers, thereby possessing the functionality of the said rice polyphenol component. Claim 2 The textile product according to claim 1, characterized in that the functionality of the textile product is at least one of antioxidant, moisturizing, and antibacterial properties. Claim 3 A textile product that has been processed with an ancillary processing agent prepared for imparting the rice polyphenol component to the fiber, characterized in that the ancillary processing agent contains an extract of the rice polyphenol component in a weight ratio of 0.01% by weight or more and 10.0% by weight or less of the total weight of the ancillary processing agent. Claim 4 The fiber product according to claim 1 or 2, characterized in that an accessory processing agent prepared for imparting the rice polyphenol component to the fiber is a two-component accessory processing agent, which is mixed during accessory processing and then used for accessory processing. Claim 5 The fiber product according to claim 4, characterized in that it is processed with an accessory processing agent in which the content of the extract containing the rice polyphenol component is 0.01% by weight or more and 20.0% by weight or less based on the total weight of the proper mixing ratio of the two-component accessory processing agent. Claim 6 The fiber product according to claim 1 or 2, characterized in that the rice polyphenol component is bound to the fiber through a mordant in a bath. Claim 7 A method for manufacturing a fiber product, characterized in that a mordant is first reacted with the fiber in a bath, and then an extract containing a rice polyphenol component, which is a functional component extracted from defatted rice bran, is added to the bath in which the fiber reacted with the mordant is present, and the rice polyphenol component is bound to the fiber and imparted thereto.

Advantages of the Invention

[0019] The fiber product of the present invention imparts a rice polyphenol component extracted from defatted rice bran, which is food residue, to the fiber product, and exhibits the functionality, antioxidant property, moisture retention property, and antibacterial property of the imparted rice polyphenol component, and is a fiber product in which the expression of the functionality can be measured and confirmed. As a method for imparting the rice polyphenol component to the fiber, it is a fiber product produced by either a method of preparing a fiber processing agent containing the rice polyphenol component as a main component and imparting it to the fiber by a method called accessory processing or a method of directly binding the fiber and the rice polyphenol component using a chemical agent called a mordant. Further, it relates to a manufacturing method for directly binding the fiber and the rice polyphenol component.

[0020] According to the present invention, it is possible to reuse defatted rice bran, which is a food waste, thereby reducing the environmental burden. Furthermore, it is possible to obtain textile products that are endowed with functional properties such as antioxidant, moisturizing, and antibacterial properties by utilizing the extracted rice polyphenol components. In addition, since defatted rice bran is a residue after the oil components have been extracted, it is possible to extract hydrophilic rice polyphenol components that are hindered by the oil components during the extraction of rice and rice bran, thereby obtaining textile products that are endowed with multiple rice polyphenol components. [Brief explanation of the drawing]

[0021] [Figure 1] Figures 1(a) to 1(c) are schematic diagrams illustrating the process by which rice polyphenol components are bound to fibers via a mordant, and an example of the manufacturing process. [Figure 2] Figures 2(a) to 2(c) are schematic diagrams showing the state and manufacturing process of fixing rice polyphenol components to textile products using conventionally used chemical agents. [Figure 3] Figure 3 is a graph showing the measured antioxidant activity of Example 1 and Comparative Examples 1 and 2. [Figure 4] Figure 4 is a graph showing the measured antioxidant activity of Example 2 and Comparative Examples 1 and 5. [Figure 5] Figure 5 is a graph showing the measured antioxidant activity of Example 3 and Comparative Examples 1 and 5. [Figure 6] Figure 6 is a graph showing the measured antioxidant activity of Examples 4 and 5 and Comparative Examples 7-9. [Figure 7] Figure 7 is a graph showing the measured moisture content of Example 1 and Comparative Examples 1 and 2. [Figure 8] Figure 8 is a graph showing the measured moisture content of Example 2 and Comparative Example 4. [Figure 9] Figure 9 is a graph showing the measured moisture content of Example 3 and Comparative Examples 1 and 5. [Figure 10] Figure 10 is a graph showing the measured moisture content of Examples 4 and 5 and Comparative Examples 7-9. [Figure 11]Figure 11 is a graph showing the increase or decrease in stratum corneum moisture content of the monitors' skin, as measured in the monitoring tests for Example 3 and Comparative Example 1. [Figure 12] Figure 12 is a graph showing the increase or decrease in stratum corneum moisture content of the monitors' skin, as measured in the monitoring tests for Example 4 and Comparative Example 7. [Figure 13] Figure 13 is a photograph of the skin on the inner side of the monitor's right forearm, observed with a microscope before the monitor test. [Figure 14] Figure 14 is a photograph of the skin on the inner side of the monitor's right forearm, observed with a microscope after a monitor test in which the device in Example 3 was worn. [Figure 15] Figure 15 is a photograph of the skin on the inner side of the monitor's right forearm, observed with a microscope after a monitor test in which Comparative Example 1 was worn. [Modes for carrying out the invention]

[0022] The actual implementation of the present invention will be described in detail below. The textile product of the present invention is a textile product to which rice polyphenol components extracted from defatted rice bran, which is a food residue, are applied, thereby exhibiting the functionality, antioxidant properties, moisturizing properties, and antibacterial properties of the applied rice polyphenol components, and the superiority of the exhibited functionality can be confirmed and verified by measuring it.

[0023] (1) Defatted rice bran The defatted rice bran used in this invention is food residue obtained by extracting rice oil from rice bran, and can be waste from food processing plants that manufacture edible oils and fats. The particle size of the defatted rice bran should be appropriately selected to match the extraction machine and filtration machine used in this invention. While finer defatted rice bran particles will increase the amount of rice polyphenols extracted, caution is needed as this may cause clogging of the filtration machine's filtration method and mesh size, resulting in a considerable amount of time required for filtration.

[0024] Furthermore, the defatted rice bran used in this invention must be obtained by removing the solvent used to extract the rice oil after extraction and then drying it. This is because if the solvent remains, there is a high concern that it will inhibit the extraction ability of the solvent used to extract the polyphenol components, which may prevent sufficient extraction. It is desirable to use defatted rice bran from which the rice oil extraction solvent has been removed and dried, after crushing any lumps formed during drying and passing it through a mesh to ensure a uniform particle size distribution.

[0025] The rice bran used as the raw material for the defatted rice bran in this invention is preferably rice bran obtained from controlled rice, such as rice bran collected from domestically produced rice. This is because it is necessary to be able to confirm information on pesticides used and to prevent impurities from being mixed into the extracted rice polyphenol components.

[0026] The method for extracting rice polyphenol components from defatted rice bran used in this invention involves using a known extractor, heating the defatted rice bran to extract the rice polyphenol components, then cooling the extract and filtering it with a known filter. The machine and extraction conditions should be appropriately selected according to the particle size of the defatted rice bran. Since the rice polyphenol components are boiled out by heating during the extraction of defatted rice bran, a sealed extractor is preferable. The heating temperature should be within the temperature range normally used for extraction, preferably in the range of 80°C to 120°C. The heating temperature should be appropriately selected according to the particle size of the defatted rice bran used for extraction and the extraction solvent used. The extract obtained from the extractor is then filtered to obtain only the extract containing rice polyphenol components. The filter should be appropriately selected according to the particle size of the defatted rice bran used for extraction, but considering the efficiency of filtration, the use of a centrifugal filter is preferable. Furthermore, if the particle size of the defatted rice bran is small, centrifugal filtration alone may not completely separate the defatted rice bran from which the rice polyphenol components have been extracted. Therefore, it is preferable to perform further filter filtration. The pore size of the filter mesh should be selected appropriately according to the particle size of the defatted rice bran used, but it is preferable to use a mesh with a pore size of about 1 μm.

[0027] When extracting rice polyphenol components from defatted rice bran used in the present invention, any solvent that can efficiently extract rice polyphenol components from defatted rice bran should be appropriately selected as the extraction solvent, and the use of glycols such as diethylene glycol, propylene glycol, and polyethylene glycol is desirable.

[0028] (2) Rice polyphenol components The rice polyphenol components used in this invention refer to a group of polyphenol components extracted from defatted rice bran, which are known polyphenol components contained in the defatted rice bran extract.

[0029] The rice polyphenol components used in this invention include, for example, lipophilic polyphenols and hydrophilic polyphenols found in known defatted rice bran. Lipophilic polyphenols refer to a group of polyphenol components including, for example, ferulic acid and ceramide components (rice ceramide), while hydrophilic polyphenols refer to a group of polyphenol components including, for example, phytic acid and inositol.

[0030] (3) Textile products The textile products of this invention refer to fibers and products made from fibers, which have rice polyphenol components extracted from defatted rice bran fixed to them.

[0031] In terms of the form of textile products, appropriate selections may be made from known forms according to the intended use of the textile product, including woven fabrics such as yarn, woven fabrics, knitted fabrics, and nonwoven fabrics; underwear such as slips, camisoles, petticoats, shorts, underpants, tights, T-shirts, crew neck shirts, U-neck shirts, bodysuits, girdles, running shirts, underpants, tights, briefs, trunks, etc.; legwear such as tights, pantyhose, and socks; general clothing such as dress shirts, blouses, slacks, and skirts; sportswear such as polo shirts, warm-up wear, swimwear, and leotards; loungewear such as pajamas and yukata; uniform wear; clothing accessories such as linings, supporters, towels, handkerchiefs, mufflers, scarves, and cosmetic face masks; bedding such as futon covers, futon covers, pillowcases, bed covers, towel blankets, sheets, blankets, cushion covers, and upholstery.

[0032] Furthermore, the fibers used in the present invention are those used to construct textile products and can be in known forms, such as raw cotton and sliver for producing spun yarn, spun yarn produced from raw cotton, spun yarn produced in the spinning process, or raw cotton produced by cutting filaments produced by spinning. These can be appropriately selected according to the intended use of the textile product.

[0033] The fiber material used in this invention can be appropriately selected according to the intended use of the textile product. Examples of fiber materials that can be used include natural fibers such as cotton, linen, wool, and silk; regenerated fibers such as rayon, modal, and lyocell; semi-synthetic fibers such as acetate and triacetate; and synthetic fibers such as nylon, polyester, and polylactic acid. These include 100% spun yarns, blended yarns, and filaments. Any of these can be selected and used according to the intended use of the textile product, but the use of natural fibers such as cotton and linen is desirable from the viewpoint of reducing environmental impact and easily expressing the functionality derived from rice polyphenol components. Furthermore, when the fiber is reacted with and bonded to the rice polyphenol component, it is necessary to have a reactive group that can bond with the rice polyphenol component. The use of natural fibers such as cotton, linen, wool, and silk, regenerated fibers such as rayon, modal, and lyocell which are composed of cellulose similar to cotton and linen and have similar reactive groups, and nylon which has similar reactive groups to wool and silk is desirable.

[0034] (4) Functionality added to textile products The textile product of the present invention is a textile product to which the functionality of rice polyphenol components is imparted by fixing rice polyphenol components to it.

[0035] The functionality imparted to the textile product is derived from the rice polyphenol component, and may possess at least one of the major functionalities known as antioxidant, moisturizing, and antibacterial properties, or it may possess multiple functionalities. However, the functionality of the textile product must be evaluated and measured to confirm and verify its superiority. In the case of the textile product of the present invention, superior functionality in terms of antioxidant, moisturizing, and antibacterial properties has been confirmed, and as a result, the textile product is characterized by possessing the functionality of the rice polyphenol component.

[0036] (5) Method for imparting rice polyphenol components to fiber products There are two methods for imparting rice polyphenol components to textile products: "a method of preparing a textile processing agent with rice polyphenol components as the main component and imparting it to the textile product by ancillary processing" and "a method of directly bonding the fibers and rice polyphenol components using a mordant." The appropriate method should be selected according to the material composition, form, and intended use of the textile product. However, the method of directly bonding the fibers and rice polyphenol components using a mordant can only be used for textile products made of fiber materials that have reactive groups that can bond with rice polyphenol components. Therefore, it is desirable to use this method on natural fibers such as cotton, linen, wool, and silk, as well as regenerated fibers such as rayon, modal, and lyocell, which are composed of cellulose similar to cotton and linen and have similar reactive groups, and nylon, which has similar reactive groups to wool and silk.

[0037] (6) Fiber processing agent containing rice polyphenol components as the main ingredient The fiber processing agent mainly composed of rice polyphenol components produced in this invention is a processing agent that can be used to add agglomerate to fibers, which the inventors have diligently researched and developed as a method for imparting rice polyphenol components extracted from defatted rice bran to fiber products.

[0038] The inventors diligently conducted repeated studies on a method to fix extracted rice polyphenol components to textile products and bring out the functionality of the rice polyphenol components, and found that the rice polyphenol components can be permeated into the fibers and that the rice polyphenol components can be bound to the fibers.

[0039] Therefore, the inventors used the fact that rice polyphenol components can be impregnated into fibers to create an emulsion-type fiber processing agent using defatted rice bran extract, in which the components are dispersed almost uniformly within the processing agent, and invented a method to apply this to textile products through ancillary processing. After repeated and intensive studies, they created a fiber processing agent. With this fiber processing agent, rice polyphenol components can be attached to textile products through conventional ancillary processing steps, resulting in textile products in which the functionality of rice polyphenol components is expressed.

[0040] The amount of defatted rice bran extract mixed into the fiber processing agent should be appropriately selected depending on the stability of the processing agent to be prepared, and it is desirable that it be in the range of 0.01% to 10.0% by weight of the total weight of the fiber processing agent prepared using the defatted rice bran extract. If the amount of defatted rice bran extract mixed is less than 0.01% by weight of the total weight of the fiber processing agent prepared using the defatted rice bran extract, the amount of rice polyphenol components that can be attached to the textile product will be small, and the functionality of the rice polyphenol components will not be expressed. If the amount of defatted rice bran extract mixed is more than 10.0% by weight of the total weight of the fiber processing agent prepared using the defatted rice bran extract, emulsification will not be possible during the preparation of the fiber processing agent, and the rice polyphenol components will precipitate and settle, making it impossible to use it as a fiber processing agent.

[0041] Next, the inventors confirmed the liquid stability of the fiber processing agent, which mainly consists of the developed rice polyphenol component.

[0042] Textile processing agents used in ancillary processing of textiles are used in dyeing and finishing plants. Therefore, they are transported over long periods to overseas dyeing and finishing plants in countries such as China and Vietnam, which are major production centers for textile products today, and are stored for extended periods in high-temperature, high-humidity chemical warehouses at these plants. For this reason, textile processing agents must be highly stable.

[0043] The inventors then observed the liquid stability of a fiber processing agent, primarily composed of rice polyphenols, developed using a dryer adjusted to simulate the temperature and humidity inside a shipping container. The results showed that the emulsion disintegrated and precipitated after 20 days. This revealed that the developed fiber processing agent lacked liquid stability for overseas transport and storage at processing plants.

[0044] Therefore, the inventors diligently conducted repeated studies to improve the liquid stability of the developed fiber processing agent, particularly its stability during overseas transport and storage in high-temperature, high-humidity warehouses at processing plants. They discovered that by dividing the developed fiber processing agent into two liquids and mixing the two liquids to create an emulsion when preparing the ancillary processing aqueous solution immediately before ancillary processing, the fiber processing agent could be made highly stable. After further diligent studies, the inventors created a two-liquid fiber processing agent.

[0045] The two-liquid composition involves increasing the proportion of the first liquid so that it consists almost entirely of the extract containing the main component, rice polyphenol, and adding a small amount of the extract to the other liquid as a nucleating agent that promotes emulsification. This creates an emulsified fiber processing agent when preparing the auxiliary processing aqueous solution.

[0046] The inventors left the newly developed two-component fiber processing agent in a dryer under the aforementioned conditions and observed its liquid stability. As a result, no precipitation of the components occurred even after 90 days, and the agent remained stable. The inventors have now completed a fiber processing agent with excellent liquid stability, primarily composed of the rice polyphenol component of the present invention.

[0047] During their investigation, the inventors discovered that by creating a two-liquid solution, the amount of defatted rice bran extract mixed into the fiber processing agent could be increased, and that polyphenol components other than defatted rice bran extract could be mixed in. The two-liquid fiber processing agent completed by the inventors can impart more rice polyphenol components to the fiber product than the fiber processing agent prepared above, resulting in a fiber product that exhibits a higher level of the functional effects of rice polyphenol components.

[0048] The amount of defatted rice bran extract mixed into the two-part fiber processing agent should preferably be in the range of 0.01% to 20.0% by weight of the total weight of the two-part fiber processing agent mixed at the appropriate mixing ratio using the defatted rice bran extract. If the amount of defatted rice bran extract mixed is less than 0.01% by weight of the total weight of the fiber processing agent mixed at the appropriate mixing ratio using the defatted rice bran extract, the amount of rice polyphenol components that can be attached to the textile product will be small, and the functionality of the rice polyphenol components will not be expressed. If the amount of defatted rice bran extract mixed is more than 20.0% by weight of the total weight of the fiber processing agent mixed at the appropriate mixing ratio using the defatted rice bran extract, rice polyphenol components will precipitate and settle when the two-part fiber processing agent is mixed and emulsified during the ancillary processing, making it unusable as a fiber processing agent.

[0049] The mixing ratio of the two-component fiber processing agent of the present invention can be appropriately selected according to the material composition, form, and intended use of the textile product. When one solution, which is added as a nucleating agent capable of promoting emulsification of a small amount of extract, is called solution A, and the other is called solution B, the mixing ratio of the two solutions is preferably A:B = 1:3 to 1:10, more preferably 1:4 to 1:8, and even more preferably 1:5 to 1:6.

[0050] The method for applying the fiber processing agent to a textile product using the present invention involves applying the fiber processing agent to the textile product using a known processing machine and a known processing method, and can be appropriately selected according to the material composition, form, and intended use of the textile product. For example, if the textile product is cotton or yarn, the processing can be done by exhaustion using a loose hair dyeing machine or cheese dyeing machine. For woven or knitted fabrics, the Pad-Dry method, in which the processing aqueous solution is dipped with padding and excess chemical is squeezed out with a mangle, or the exhaustion method using a liquid flow dyeing machine is preferable. For products such as polo shirts, the exhaustion method using a paddle dyeing machine is preferable.

[0051] The ancillary processing temperature should be appropriately selected according to the material composition, form, and intended use of the textile product, in accordance with the specifications of known ancillary processing machines and known ancillary processing methods, and it is desirable to process within the range of 60°C to 150°C.

[0052] (7) Mordants The mordants used in this invention refer to chemicals used as color fixatives to promote the fixation of pigments after they have been fixed to fibers using natural dyes. Among mordants with various color-fixing mechanisms, such as tannins and lime, this invention uses mordants whose main component is a metal salt.

[0053] The inventors had been conducting research using cationizing agents, a conventionally used chemical agent, as a method for fixing rice polyphenol components to textile products. However, they found that cationizing agents have a high environmental impact and are too poorly durable for use in ordinary clothing. Furthermore, they confirmed that the fixed rice polyphenol components would fall off during washing. As a result, they abandoned the use of cationizing agents to fix rice polyphenol components and began searching for a new method of fixation.

[0054] Therefore, the inventors focused on the color-fixing mechanism of mordants used as color fixatives, and after repeated and thorough research, discovered a method to bond the reactive groups of the fibers with the rice polyphenol component via the mordant. This fixing method allows for direct bonding between the fibers and the mordant, resulting in stable functionality and highly durable textile products that can withstand washing.

[0055] The mordant used in this invention can be any mordant whose main component is a metal salt that can become a metal ion in water and bind the fibers to the rice polyphenol component, and can be appropriately selected according to the material composition, form, and intended use of the textile product. Examples of metals that can be used as the main component metal salt include iron, copper, tin, and titanium. In addition, aluminum, which is used in mordants such as alum, calcined alum, and camellia ash, can also be used as a mordant in this invention. Since the metals of the mordants used in this invention are all substances that exist in the global environment, mordants whose main component is a metal salt are agents that have a low environmental impact and are suitable for sustainable solutions.

[0056] The amount of mordant used should be appropriately selected according to the material composition, form, intended use, and the amount and concentration of the defatted rice bran extract containing rice polyphenol components used for bonding in the textile product, and is not particularly limited.

[0057] (8) Method for binding rice polyphenol components to textile products using a mordant The following describes in detail the method and process of bonding rice polyphenol components to textile products in a bath using the mordant of the present invention, with reference to the drawings. For the fibers used in the schematic diagrams shown in the drawings, cotton yarn was used as a model to create the schematic diagrams.

[0058] Figure 1 shows a step-by-step method for bonding rice polyphenol component 5 to a textile product in a bath using the mordant of the present invention, and Figure 2 shows a step-by-step method for fixing rice polyphenol component 5 to a textile product in a bath using a conventional cationizing agent 10. Figures 1(a) and 2(a) show cotton yarn 1, which is the fiber to which rice polyphenol component 5 is bonded, and rice polyphenol component 5. The reactive groups of cotton yarn 1 have negative ionic properties 2 in the bath, and the reactive groups of rice polyphenol component 5 also have negative ionic properties 6 in the bath. Therefore, they repel each other electrically in the bath and cannot bond to one another.

[0059] Figure 1(b) shows the method of using the mordant 3 of the present invention. The mordant 3, which is mainly composed of a metal salt, has a positive ionic character 4, which is the ionic character of the metal, in the bath. The inventors focused on the behavior of the ionic character 4 of the mordant 3, which is mainly composed of a metal salt, in the bath and conducted repeated intensive studies. They succeeded in ionically bonding the mordant 3 and the cotton yarn 1 by treating the mordant 3 and the cotton yarn 1 before the fixation of the rice polyphenol component 5. This ionic bonding makes it possible to positively ionize the reactive groups of the cotton yarn 1.

[0060] Figure 1(c) shows the binding state of the rice polyphenol component 5 using the mordant 3 of the present invention. Following the process in Figure 1(b), the ionicity 2 of the cotton yarn 1 to which the rice polyphenol component 5 is to be fixed became positively ionic. The inventors then conducted further diligent studies and succeeded in ionically bonding the positive ions of the mordant 3 bound to the cotton yarn 1 with the negative ions of the rice polyphenol component 5. As a result, the cotton yarn 1 and the rice polyphenol component 5 are bound via the mordant 3, allowing for strong adhesion. Therefore, textile products to which the rice polyphenol component 5 is bound and fixed using the mordant 3 in a washing bath exhibit stable functionality and high wash durability.

[0061] Figures 2(b) and 2(c) show a conventional method for fixing rice polyphenol component 5 using a cationizing agent 10 for comparison with the present invention. The cationizing agent 10 reacts with the negative ions of the cotton yarn 1, coating and fixing the cotton yarn 1. The rice polyphenol component 5 is adsorbed onto the positive ions (ionic 11) of the cationizing agent 10 coating the cotton yarn 1 and fixed onto the cotton yarn 1. In this case, the cationizing agent 10 and the rice polyphenol component 5 do not form an ionic bond, but are only electrically attracted to each other, so they easily fall off due to washing or friction. The inventors have found a method for bonding rice polyphenol component 5 in light of this situation.

[0062] For the process of bonding rice polyphenol components 5 to a textile product via mordant 3 in a bath according to the present invention, any known dyeing machine can be used, and it can be appropriately selected according to the material composition, form, and intended use of the textile product. For example, if the textile product is cotton or yarn, a loose hair dyeing machine or cheese dyeing machine can be used; if it is a woven or knitted fabric, a jet dyeing machine can be used; and if it is a product such as a polo shirt, a paddle dyeing machine can be used.

[0063] The amount of defatted rice bran extract used for textile products treated with mordant 3 should be appropriately selected according to the amount of textile product to which rice polyphenol component 5 is bound. The amount and concentration of the defatted rice bran extract should be appropriately selected according to the material composition, form, and intended use. [Examples]

[0064] The present invention will be described in more detail below with reference to examples. The present invention is not limited in any way by these examples. The performance evaluation of the rice polyphenol-containing products in the examples was carried out by the following method.

[0065] [1] Evaluation tests and evaluation methods (1) Confirmation of the presence of rice polyphenol components by color reaction in the extract and yarn / fabric. To confirm the presence of rice polyphenol components in the defatted rice bran extract and yarn / fabric obtained in the examples and comparative examples, color reactions were performed using gallic acid methanol solution (gallic acid reagent and 50% methanol solution, both manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), Forin-Chiocart reagent (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), and saturated sodium carbonate aqueous solution (anhydrous sodium carbonate, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.).

[0066] (2) Antioxidant properties of yarns and fabrics Using the yarns and fabrics obtained in the examples and comparative examples, the DPPH radical scavenging activity method, which evaluates the antioxidant activity of food components, was applied, and the yarns and fabrics obtained in the examples and comparative examples were measured and evaluated according to the test procedure described below. <Test Procedure> 1) Dissolve DPPH (1,1-diphenyl-2-picrylhydrazyl) reagent manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. in ethanol and adjust the concentrations to 160 μmol / L and 80 μmol / L. 2) Next, 100 μL of 160 μmol / L DPPH solution was added to 100 μL of Trolox reagent from Fujifilm Wako Pure Chemical Industries, Ltd., at known concentrations of different concentrations, and allowed to stand for 20 minutes. The absorbance of each solution was then measured to create a calibration curve. 3) 200 mg of the measurement sample was cut from the yarn or fabric obtained in the examples and comparative examples and placed in a test tube. 5 mL of 80 μmol / L DPPH solution was added to this and the tube was subjected to ultrasound for 10 minutes. 4) After standing for 1 hour, the color of the solution was observed and the absorbance was measured. 5) The color of the solution and the absorbance were similarly observed and measured after 3 hours and 6 hours. 6) The absorbance measured based on the calibration curve was converted to Trolox concentration, and the antioxidant value (radical scavenging rate) was calculated from that value.

[0067] (3) Moisture retention of yarn and fabric (3)-1 Measurement of moisture retention properties of yarn and fabric Using the yarns and fabrics obtained in the examples and comparative examples, the change in moisture content of the yarns and fabrics obtained in the examples and comparative examples was measured using the test method described below, and the moisture retention rate was calculated. <Test Procedure> 1) Using a DP-63P dryer manufactured by Yamato Scientific Co., Ltd., the fabrics obtained in the examples and comparative examples were left in the dryer, which was adjusted to 105°C ± 2°C, for 1 hour to allow the samples to dry completely, and then the mass of the samples was measured. 2) Next, using a Yamato Scientific Co., Ltd. DP-63P dryer with the internal environment adjusted to a temperature of 40°C ± 2°C and a relative humidity of 90% ± 5%, the completely dry sample is left inside to absorb moisture. 3) Measure the change in mass after 1 hour, 2 hours, 3 hours, and 4 hours. 4) Transfer the moisture-absorbing sample to a Yamato Scientific Co., Ltd. DP-63P dryer, where the environment inside the dryer is adjusted to a temperature of 20°C ± 2°C and a relative humidity of 65% ± 5%, and leave it there to allow the sample to release its moisture. 5) Similar to the measurement of the moisture absorption state, measure the change in mass after 1 hour, 2 hours, 3 hours, and 4 hours. 6) The moisture retention rate was calculated from the measurements taken in the completely dry state, the humidified state, and the humidified state.

[0068] (3)-2 Monitor moisturizing test using fabric Using the fabrics obtained in the examples and comparative examples, a moisturizing test was conducted by a monitor according to the test procedure described below. <Test Procedure> 1) Before the test, wash the test area (inner forearm) with a cleansing agent using lukewarm water that does not cause sweating. 2) After gently wiping away any moisture with a soft gauze that will not irritate the measurement site, place the monitor into a measurement environment room set to a room temperature of 22°C ± 2°C and a relative humidity of 55% ± 5%, and allow the monitor to sit still for 20 minutes to allow the measurement site to acclimate to the environment. 3) The amount of stratum corneum moisture before measurement is measured using the SKICON-200EX stratum corneum moisture meter manufactured by IBS Corporation. 4) Wrap the fabric obtained in the examples and comparative examples around the measurement site about twice with tension that does not compress the measurement site, and secure the ends with paper tape. 5) The monitor will remain seated and at rest until the designated measurement time, with the fabric obtained in the examples and comparative examples wrapped around the measurement site. 6) After 1 hour, remove the wrapped cloth and immediately measure the stratum corneum moisture content of the measurement site. 7) Immediately after measurement, wrap the person in cloth and remain seated and at rest until the designated measurement time. 8) After 3 hours, remove the wrapped cloth and immediately measure the stratum corneum moisture content of the measurement site. 9) The percentage change in skin stratum corneum moisture was calculated using the pre-test measurement as 100%.

[0069] (3)-3 Observation of the skin condition of monitors who underwent the moisturizing test In the monitor moisturizing test using the fabric described in (3)-2 above, the skin condition of the monitor's measurement site before and after the test was observed using a measuring microscope CT200HD-50TD manufactured by Matsudensha Co., Ltd., after test procedures 2) and 8).

[0070] (4) Antibacterial properties of fabrics and yarns The yarns obtained in the examples and comparative examples were used to measure the antibacterial and deodorizing properties against Staphylococcus aureus using the JIS-L-1902 bacterial count absorption method. The yarns were washed 10 times using the standard washing method of the Japan Textile Evaluation Technology Council's "Washing Method for SEK Mark Textile Products" to measure the wash durability of the antibacterial properties.

[0071] (5) The fastness of the yarn Using the yarns obtained in the examples and comparative examples, the fastness to washing was measured using JIS-L-0844 Washing Method B, the fastness to friction using JIS-L-0849 Gakushin-type friction method, and the fastness to sweat using JIS-L-0848.

[0072] [2] Evaluation results (1) Confirmation of the presence of rice polyphenol components by color reaction in the extract and yarn / fabric. Example 1 For the defatted rice bran, Oryza Germ-DLP manufactured by Oryza Oil & Fat Chemical Co., Ltd. was used. As the extraction solvent, polyethylene glycol solution "PEG300" manufactured by Wako Pure Chemical Industries, Ltd. was used, and after adding water and stirring uniformly, the defatted rice bran was added and stirred uniformly to prepare the pre-extraction aqueous solution. The prepared pre-extraction aqueous solution was placed in a sealed heating device and heated at 90-100°C for 30 minutes to extract the rice polyphenol components. After cooling, the extracted solution was placed in a basket-type centrifuge "KMN-24" jacket (fine) manufactured by Kansai Centrifugal Separator Mfg. Co., Ltd., and the filtrate was recovered by centrifugal filtration.

[0073] After adding a preservative to the recovered filtrate, the extract of the present invention was obtained by filtering through a 1 μm filter. A color reaction was performed on this extract to confirm the presence of rice polyphenol components, and it turned green, confirming the presence of rice polyphenol components in the obtained extract.

[0074] Next, a fiber processing agent was prepared using the obtained extract. The extract was brought to Rakuto Chemical Industry Co., Ltd., where repeated intensive studies were conducted on the mixing ratio and the stability of the processing agent, resulting in the completion of "Rakuset FR". The amount of extract mixed into "Rakuset FR" was 8.5% by weight of the total weight of "Rakuset FR". A color reaction was performed on "Rakuset FR" to confirm the presence of rice polyphenol components, and it turned green, confirming the presence of rice polyphenol components in the obtained extract.

[0075] Using 100% cotton 40 / 1 yarn manufactured by Nisshinbo Textile Co., Ltd., a knitting machine for T-shirts was constructed using a body-size single knit circular knitting machine "EXC-3SB" manufactured by Fukuhara Seiki Seisakusho Co., Ltd., and the knitted fabric for ancillary processing was produced by scouring, setting, and dyeing using known methods.

[0076] Using the "SWING-ACE-W LLW-W-2" low-bath ratio atmospheric pressure liquid flow dyeing machine manufactured by Nissen Division of Nippon Steel Stainless Processing Co., Ltd., an ancillary processing recipe was used in which 4% of the total weight of the knitted fabric was treated with the fiber processing agent "Rakuset FR" manufactured by Rakuto Chemical Industry Co., Ltd., and 3% of the total weight of the knitted fabric was treated with the silicone-based softener "ST-1" manufactured by Sun Techno Co., Ltd. The water in the "SWING-ACE-W LLW-W-2" was used as an ancillary processing solution, and the ancillary processing was carried out at 40°C for 10 minutes using the exhaustion treatment method for knitted fabric for ancillary processing.

[0077] The knitted fabric after the ancillary processing was removed from "SWING-ACE-W LLW-W-2" and placed into a three-point suspension type vibration-damping centrifugal dewatering machine "YDK-22" manufactured by Iwatsuki Machinery Works Co., Ltd. Dewatering was performed so that the ancillary aqueous solution remained on the knitted fabric in an amount equal to the weight of the fabric.

[0078] After dewatering the knitted fabric, it was dried at 100°C using a net-type dryer "Shrinksurfer SSG" manufactured by Hirano K&E Co., Ltd. Then, the knitted fabric was set at 130°C using a connected "Clip-type Simplex Tenter" also manufactured by Hirano K&E Co., Ltd. to obtain the knitted fabric of Example 1.

[0079] When the knitted fabric of Example 1 was immersed in the reagent and a color reaction was performed to confirm the presence of rice polyphenol components, the surface of the knitted fabric of Example 1 turned green, confirming the presence of rice polyphenol components in the knitted fabric of Example 1.

[0080] Example 2 In Example 1, a plain weave fabric was woven using 100% cotton 60 / 1 yarn manufactured by Nisshinbo Textile Inc. on an "Air Jet Loom JAT-810" manufactured by Toyota Industries Corporation, and the woven fabric for ancillary processing was used after desizing, scouring, mercerizing, setting, and dyeing by known methods. The textile processing agent "Rakuset" manufactured by Rakuto Chemical Industries, Ltd. was used. The fabric for Example 2 was obtained using the same method as Example 1, except that an aqueous solution for ancillary processing was prepared using an ancillary processing recipe in which 4% of the total volume of the aqueous solution for ancillary processing contained "FR" and 3% of the total volume of the aqueous solution for ancillary processing contained "ST-1," a silicone softener manufactured by Sun Techno Co., Ltd., and an ancillary processing padding mangle was used. The fabric for Example 2 was obtained using an ancillary processing aqueous solution prepared with. The fabric for Example 2 was obtained using an ancillary processing aqueous solution prepared with an aqueous solution prepared with an ancillary processing aqueous solution prepared with an aqueous solution prepared with an ancillary processing aqueous solution prepared with an aqueous solution prepared with an ancillary processing aqueous solution.

[0081] When the woven fabric of Example 2 was immersed in the reagent and a color reaction was performed to confirm the presence of rice polyphenol components, the surface of the woven fabric of Example 2 turned green, confirming the presence of rice polyphenol components in the woven fabric of Example 2.

[0082] Example 3 To confirm the liquid stability of "Laxette FR," a Yamato Scientific Co., Ltd. DP-63P dryer was used, with the internal environment adjusted to 50°C ± 2°C and relative humidity 90% ± 5%. When "Laxette FR" was left inside the dryer and its condition was observed, the emulsion disintegrated and component precipitates were seen after 20 days. Therefore, in order to improve the liquid stability during transportation and storage at processing plants, repeated intensive studies were conducted, and it was discovered that liquid stability could be improved by dividing it into two liquids, resulting in the completion of "Laxette FR-A" and "Laxette FR-B." The amount of extractant mixed into "Laxette FR-A" and "Laxette FR-B" was 12.8% by weight of the total weight of the mixed recipe of "Laxette FR-A" and "Laxette FR-B."

[0083] When "Laxette FR-A" and "Laxette FR-B" were left in a Yamato Scientific Co., Ltd. DP-63P dryer, with the internal environment adjusted to 50°C ± 2°C and relative humidity 90% ± 5%, and their condition was observed, no precipitation of components occurred even after 90 days, indicating a stable state. Furthermore, a color reaction was performed on a mixed solution of "Laxette FR-A" and "Laxette FR-B" to confirm the presence of rice polyphenol components. The solution turned green, confirming the presence of rice polyphenol components in the resulting extract.

[0084] In Example 1, the knitted fabric of Example 3 was obtained using the same method as in Example 1, except that instead of using the fiber processing agent "Rakuset FR" manufactured by Rakuto Kasei Kogyo Co., Ltd., an aqueous solution for the ancillary processing was prepared using 3% of the total weight of the knitted fabric with the fiber processing agent "Rakuset FR-A" manufactured by Rakuto Kasei Kogyo Co., Ltd., and 0.5% of the total weight of the knitted fabric with the fiber processing agent "Rakuset FR-B" manufactured by Rakuto Kasei Kogyo Co., Ltd.

[0085] When the knitted fabric of Example 3 was immersed in the reagent and a color reaction was performed to confirm the presence of rice polyphenol components, the surface of the knitted fabric of Example 3 turned green, confirming the presence of rice polyphenol components in the knitted fabric of Example 3.

[0086] Example 4 Using 100% cotton 40 / 2 yarn manufactured by Nisshinbo Textiles Inc., the yarn was scoured using a known method with a "High-Temperature, High-Pressure Cheese Dyeing Machine LLC" manufactured by Hisaka Works, Ltd., and then treated with the textile iron mordant "RK Color MO-F1 (Iron)" manufactured by Rakuto Chemical Industries, Ltd. After mordanting, the extract prepared in Example 1 was added to the "High-Temperature, High-Pressure Cheese Dyeing Machine LLC" to make up 30% of the total weight of the yarn to be treated. Lion Corporation's dispersant and uniform dyeing agent "Rotat OH-104K" was added at a concentration of 1 g / L, and the treatment was carried out for 1 hour while sliding the temperature from 30°C to 70°C. After soaping, the treated yarn was oiled with Lion Specialty Chemicals Corporation's cheese dyeing oiling finishing agent "Lonsize N-80". Subsequently, the treated yarn was dried at 120°C using a "Cheese Dryer UEFC-A" manufactured by Hisaka Works, Ltd., to obtain the rice polyphenol component fixed yarn of Example 4.

[0087] When the yarn from Example 4 was bundled and immersed in a reagent to perform a color reaction, the surface of the yarn bundle from Example 4 turned green, confirming that the rice polyphenol component was present in the yarn from Example 4.

[0088] Example 5 In Example 4, the rice polyphenol component-fixed yarn of Example 5 was obtained using the same method as in Example 4, except that the alum mordant for textiles "RK Color MO-A3 (aluminum)" manufactured by Rakuto Kasei Kogyo Co., Ltd. was used instead of the iron mordant for textiles "RK Color MO-F1 (iron)" manufactured by Rakuto Kasei Kogyo Co., Ltd., and the extracted solution prepared in Example 1 was used in an amount equal to 20% of the total weight of the yarn being treated.

[0089] The yarn from Example 5 was bundled and immersed in a reagent to perform a color reaction. The presence of rice polyphenol components was confirmed when the surface of the yarn bundle from Example 5 turned green, indicating that rice polyphenol components were present in the yarn from Example 5.

[0090] Comparative Example 1 Comparative Example 1 was obtained using the same method as in Example 1, except that the fiber processing agent "Rakuset FR" manufactured by Rakuto Kasei Kogyo Co., Ltd. was not used.

[0091] Comparative Example 2 As a comparative example to Example 1, the knitted fabric of Comparative Example 2 was obtained using the same method as in Example 1, except that a prototype processing agent was used in which the amount of extracted liquid mixed was 0.008% by weight of the total weight of the fiber processing agent, instead of the fiber processing agent "Rakuset FR" manufactured by Rakuto Chemical Industry Co., Ltd.

[0092] Comparative Example 3 As a comparative example with Example 1, when ancillary processing was performed using a prototype processing agent with an extract solution content of 11.0% by weight of the total weight of the fiber processing agent, instead of the fiber processing agent "Rakuset FR" manufactured by Rakuto Chemical Industry Co., Ltd., solid matter precipitated due to emulsion breakdown adhered to the entire fabric, so the production of the knitted fabric was discontinued.

[0093] Comparative Example 4 In Example 2, the woven fabric of Comparative Example 4 was obtained using the same method as in Example 2, except that the fiber processing agent "Rakuset FR" manufactured by Rakuto Kasei Kogyo Co., Ltd. was not used.

[0094] Comparative Example 5 As a comparative example to Example 3, the knitted fabric of Comparative Example 5 was obtained using the same method as in Example 3, except that prototype processing agents A and B were used, with the amount of extract mixed being 0.0085% by weight of the total weight of the mixed fiber processing agent recipe, instead of the fiber processing agents "Laxette FR-A" and "Laxette FR-B" manufactured by Rakuto Kasei Kogyo Co., Ltd.

[0095] Comparative Example 6 As a comparative example with Example 3, when ancillary processing was performed using prototype processing agents C and D, in which the amount of extracted liquid mixed was 20.8% by weight of the total weight of the mixed fiber processing agent residue, instead of the fiber processing agents "Laxette FR-A" and "Laxette FR-B" manufactured by Rakuto Kasei Kogyo Co., Ltd., solid matter precipitated due to emulsion breakdown adhered to the entire fabric, so the production of the knitted fabric was stopped.

[0096] Comparative Example 7 In Example 4, the yarn of Comparative Example 7 was obtained using the same method as in Example 4, except that the iron mordant for textiles "RK Color MO-F1 (Iron)" manufactured by Rakuto Kasei Kogyo Co., Ltd. and the extract prepared in Example 1 were not used.

[0097] Comparative Example 8 In Example 4, the yarn of Comparative Example 8 was obtained using the same method as in Example 4, except that the iron mordant for textiles "RK Color MO-F1 (Iron)" manufactured by Rakuto Kasei Kogyo Co., Ltd. was not used.

[0098] Comparative Example 9 In Example 4, the yarn of Comparative Example 9 was obtained using the same method as in Example 4, except that the cationizing agent "Cationon KCN" manufactured by Lion Corporation was used instead of the iron mordant for textiles "RK Color MO-F1 (Iron)" manufactured by Rakuto Chemical Industries, Ltd.

[0099] Upon observing the condition of the cheese in Comparative Example 9, it was found that very strong medium curing had occurred on the upper and lower edges of the cheese, as well as on the outer and inner layers of the cheese, making it unsuitable for use.

[0100] (2) Antioxidant properties of yarns and fabrics Table 1 shows the antioxidant value (radical scavenging rate) measurement results for the knitted fabric obtained in Example 1 and the knitted fabrics of Comparative Examples 1 and 2. Figure 3 shows a graph of the measured values ​​in Table 1.

[0101] [Table 1]

[0102] As is clear from Table 1 and Figure 3, the radical scavenging rate of Example 1 according to the present invention is higher than that of Comparative Examples 1 and 2. Furthermore, the radical scavenging rate of Example 1 improves over time. The radical scavenging rate of Comparative Examples 1 and 2 hardly improves over time. Example 1 according to the present invention can be said to have antioxidant properties.

[0103] Next, the results of the antioxidant activity (radical scavenging rate [%]) evaluation for the woven fabric of Example 2 and the woven fabric of Comparative Example 4 are shown in Table 2 and Figure 4.

[0104] [Table 2]

[0105] As is clear from Table 2 and Figure 4, the radical scavenging rate of Example 2 according to the present invention is higher than that of Comparative Example 4. Furthermore, the radical scavenging rate of Example 2 improves over time. The radical scavenging rate of Comparative Example 4 hardly improves over time. Example 2 according to the present invention can be said to have antioxidant properties. From Examples 1 and 2, it can be seen that the present invention can impart antioxidant properties regardless of the shape of the fabric.

[0106] Next, the results of the antioxidant activity (radical scavenging rate [%]) evaluation for the knitted fabric of Example 3 and the knitted fabrics of Comparative Examples 1 and 5 are shown in Table 3 and Figure 5.

[0107] [Table 3]

[0108] As is clear from Table 3 and Figure 5, the radical scavenging rate of Example 3 according to the present invention is higher than that of Comparative Examples 1 and 5. Furthermore, the radical scavenging rate of Example 3 improves over time. The radical scavenging rate of Comparative Examples 1 and 5 hardly improves over time. Example 3 according to the present invention can be said to have antioxidant properties.

[0109] Furthermore, comparing the radical scavenging rate results of Example 1 and Example 3, it can be seen that Example 3 shows an improved radical scavenging rate. This indicates that by making the fiber processing agent into two liquefactions, the stability of the processing agent is increased, the amount of extract mixed can be increased, and the antioxidant properties can be improved.

[0110] Next, the results of the antioxidant activity (radical scavenging rate [%]) evaluation for the treated yarns of Examples 4 and 5 and Comparative Examples 7 to 9 are shown in Table 4 and Figure 6.

[0111] [Table 4]

[0112] As is clear from Table 4 and Figure 6, the radical scavenging rates of Examples 4 and 5 according to the present invention are higher than those of Comparative Examples 7-9. Furthermore, the radical scavenging rates of Examples 4 and 5 improve over time. The radical scavenging rates of Comparative Examples 7-9 hardly improve over time. Examples 4 and 5 according to the present invention can be said to possess antioxidant properties.

[0113] Furthermore, there was almost no difference in radical scavenging rate between Example 4, which used the iron mordant for textiles "RK Color MO-F1 (Iron)," and Example 5, which used the alum mordant for textiles "RK Color MO-A3 (Aluminum)." This demonstrates that the present invention can impart antioxidant properties to textile products regardless of the type of mordant 4 used in the pretreatment.

[0114] Furthermore, comparing Example 4 with Comparative Example 8, the radical scavenging rate of Example 4 improved over time, while the radical scavenging rate of Comparative Example 8 hardly improved over time. This shows that Example 4, which used a mordant, had a higher radical scavenging rate than Comparative Example 8, which did not use a mordant. This indicates that pretreatment with a mordant can fix rice polyphenol components to cotton yarn, thereby imparting antioxidant properties to textile products.

[0115] Furthermore, comparing Example 4 with Comparative Example 9, it can be seen that the radical scavenging rate of Example 4, which uses a mordant, is higher than that of Comparative Example 9, which uses a cationizing agent. This indicates that pretreatment with a mordant can increase the amount of rice polyphenol components fixed compared to pretreatment with a cationizing agent, thereby improving the antioxidant properties of the textile product.

[0116] (3) Moisture retention of yarn and fabric (3)-1 Measurement of moisture retention properties of fabrics Table 5 shows the moisture content measurement results for the knitted fabric of Example 1 and the knitted fabrics of Comparative Examples 1 and 2. Figure 7 shows a graph of the measured values ​​in Table 5. Note that for the moisture content measurement results, the values ​​from elapsed time 0[h] to 4[h] represent the moisture content in a high-temperature, high-humidity environment, and the values ​​from elapsed time 5[h] to 8[h] represent the moisture content in a low-temperature, low-humidity environment. The same applies to the subsequent tables in this evaluation result.

[0117] [Table 5]

[0118] As is clear from Table 5 and Figure 7, Example 1 according to the present invention has a higher moisture content (moisture absorption rate) in high-temperature, high-humidity environments than Comparative Examples 1 and 2, and a lower moisture content (moisture release rate) in low-temperature, low-humidity environments than Comparative Examples 1 and 2. A high moisture absorption rate and a low moisture release rate means that the amount of moisture retained in Example 1 is higher than in Comparative Examples 1 and 2. In other words, Example 1 has moisturizing properties, and its moisturizing properties are higher than those of Comparative Examples 1 and 2.

[0119] Next, Table 6 and Figure 8 show the evaluation results of moisture retention (moisture content [%] at different time intervals) for the woven fabric of Example 2 and the woven fabric of Comparative Example 4.

[0120] [Table 6]

[0121] As is clear from Table 6 and Figure 8, Example 2 of the present invention has a higher moisture content (moisture absorption rate) in high-temperature, high-humidity environments and a lower moisture content (moisture release rate) in low-temperature, low-humidity environments than Comparative Example 4. A high moisture absorption rate and a low moisture release rate means that the amount of moisture retained in Example 2 is higher than in Comparative Example 4. In other words, Example 2 has moisturizing properties and is more moisturizing than Comparative Example 4.

[0122] Furthermore, the results from Examples 1 and 2 show that the present invention can impart moisture retention regardless of the shape of the fabric.

[0123] Next, Table 7 and Figure 9 show the evaluation results of moisture retention (moisture content [%] at different time intervals) for the knitted fabric of Example 3 and the knitted fabrics of Comparative Examples 1 and 5. [Table 7]

[0124] As is clear from Table 7 and Figure 9, Example 3 of the present invention has a higher moisture content (moisture absorption rate) in high-temperature, high-humidity environments than Comparative Examples 1 and 5, and a lower moisture content (moisture release rate) in low-temperature, low-humidity environments than Comparative Examples 1 and 5. A high moisture absorption rate and a low moisture release rate means that the amount of moisture retained in Example 3 is higher than in Comparative Examples 1 and 5. In other words, Example 3 has moisturizing properties, and its moisturizing properties are higher than those of Comparative Examples 1 and 5.

[0125] Furthermore, the results from Examples 1 and 2 show that the present invention can impart moisture retention regardless of the shape of the fabric.

[0126] Furthermore, comparing the moisture content results of Example 1 and Example 3, it can be seen that Example 3 has a higher moisture absorption rate than Example 1, while the moisture release rate remains unchanged. This indicates that by liquefying the fiber processing agent into two components, the stability of the processing agent is increased, and the amount of extract mixed can be increased, thereby improving moisture retention.

[0127] Next, the results of the evaluation of moisture retention (moisture content [%] at different time intervals) for the treated yarns of Examples 4 and 5 and Comparative Examples 7 to 9 are shown in Table 8 and Figure 10.

[0128] [Table 8]

[0129] As is clear from Table 8 and Figure 10, Examples 4 and 5 of the present invention exhibit a higher moisture content (moisture absorption rate) in high-temperature, high-humidity environments than Comparative Examples 7-9, and a lower moisture content (moisture release rate) in low-temperature, low-humidity environments than Comparative Examples 7-9. A high moisture absorption rate and a low moisture release rate mean that the amount of moisture retained in Examples 4 and 5 is higher than that in Comparative Examples 7-9. In other words, Examples 4 and 5 have moisturizing properties, and their moisturizing properties are higher than those of Comparative Examples 7-9.

[0130] Furthermore, there was almost no difference in moisture absorption and release rates between Example 4, which used the iron mordant for textiles "RK Color MO-F1 (Iron)," and Example 5, which used the alum mordant for textiles "RK Color MO-A3 (Aluminum)." This demonstrates that the present invention can impart moisture retention to textile products regardless of the type of mordant used for pretreatment.

[0131] Comparing the moisture absorption and release rates of Example 4 and Comparative Example 8, it can be seen that Example 4 has a higher moisture absorption rate and a lower moisture release rate than Comparative Example 8. This indicates that by performing mordant treatment as a pretreatment, the rice polyphenol component is fixed to the cotton yarn, imparting moisture retention properties to the textile product.

[0132] Furthermore, comparing the moisture absorption and release rates of Example 4, which used a mordant as a pretreatment agent, and Comparative Example 9, which used a cationizing agent as a pretreatment agent, it can be seen that Example 4 had a higher moisture absorption rate and a lower moisture release rate than Comparative Example 9. It can be seen that the amount of rice polyphenol component fixed differs depending on the pretreatment agent, and it can be seen that the fixing method using the mordant of the present invention can impart moisture retention to textile products more effectively than the conventional fixing method using a cationizing agent.

[0133] Comparing Comparative Example 9 with Comparative Example 7, it can be seen that Comparative Example 9 has lower moisture absorption and release rates than Comparative Example 7. When a cationizing agent is used as a pretreatment agent, the moisture absorption rate decreases because the cationizing agent coats the surface of the yarn and makes it hydrophobic. It can be seen that when conventional cationizing agents are used, the functionality of the fixed rice polyphenol component cannot be expressed.

[0134] (3)-2 Monitor moisturizing test using fabric The stratum corneum moisture content was measured using the knitted fabric obtained from Example 3 and the knitted fabric from Comparative Example 1 by a monitor. The monitor was a woman in her 30s, and the measurement was taken on the medial side of her right forearm.

[0135] Table 9 shows the results of the increase / decrease in stratum corneum moisture content calculated from the obtained stratum corneum moisture content measurement results. Figure 11 shows a graph of the stratum corneum moisture content increase / decrease results from Table 9.

[0136] [Table 9]

[0137] As is clear from Table 9 and Figure 11, the stratum corneum moisture content of the skin wearing Example 3 according to the present invention is higher and shows an increasing trend compared to Comparative Example 1. This indicates that the moisturizing properties of Example 3 suppress moisture evaporation from the skin and maintain skin moisture. This shows that the knitted fabric of the present invention is a fabric that provides a moisturizing effect when actually worn.

[0138] Next, knitted fabrics were prepared using the yarns obtained from Example 4 and Comparative Example 7, and the stratum corneum moisture content was measured using these fabrics by a monitor. The monitor was a woman in her 30s, and the measurement was taken on the medial side of her left forearm.

[0139] Table 10 shows the percentage change in stratum corneum moisture content calculated from the obtained stratum corneum moisture content measurement results. Figure 12 shows a graph of the percentage change in stratum corneum moisture content results from Table 10.

[0140] [Table 10]

[0141] As is clear from Table 10 and Figure 12, the stratum corneum moisture content of the skin wearing Example 4 according to the present invention is higher and shows an increasing trend compared to Comparative Example 7. This indicates that the moisturizing properties of Example 4 suppress moisture evaporation from the skin and maintain skin moisture. It can be seen that the knitted fabric made from the yarn of the present invention is a fabric that feels moisturizing when actually worn.

[0142] (3)-3 Observation of the skin condition of monitors who underwent the moisturizing test Figure 13 shows a photograph taken with a microscope of the skin on the inner side of the right forearm before the knitted fabric was attached, Figure 14 shows a photograph taken with a microscope of the skin on the inner side of the right forearm after wearing Example 3 for 3 hours, and Figure 15 shows a photograph taken with a microscope of the skin on the inner side of the right forearm after wearing Comparative Example 1 for 3 hours.

[0143] As is clear from Figures 13, 14, and 15, when comparing the skin condition before wearing Example 3 of the present invention with the skin condition after wearing it for 3 hours, the skin after 3 hours appears to have a smoother texture, less redness, and a healthier appearance. Since the skin condition after wearing Comparative Example 1 for 3 hours does not show the same trend of change as in Example 3, it can be considered that the knitted fabric of Example 3 of the present invention has some effect on the skin.

[0144] (4) Antibacterial properties of fabrics and yarns Table 11 shows the measurement results of the antibacterial properties (antibacterial activity values) of the knitted fabric from Example 3 and the yarn from Example 4.

[0145] [Table 11]

[0146] As is clear from Table 11, the knitted fabric of Example 3 and the yarn of Example 4 according to the present invention exhibited higher antibacterial properties than standard cotton fabrics, and this performance was maintained even after 10 washes. The knitted fabric and yarn of the present invention meet the blue standard and antibacterial activity value of 2.2 or higher of the "SEK mark," which is the certification standard for antibacterial products established by the Japan Textile Evaluation Technology Council, indicating that their antibacterial properties are recognized even by official standards.

[0147] (5) The fastness of the yarn Table 12 shows the measurement results for the fastness to washing, fastness to friction, and fastness to sweat of the yarn obtained from Example 4 and Comparative Example 9.

[0148] [Table 12]

[0149] As is clear from Table 12, the yarn of Example 4 according to the present invention has higher fastness than the yarn of Comparative Example 9. The general standards for fastness for general clothing are that discoloration and staining are both grade 4 or higher, the rub fastness of the fabric in a dry state is grade 4 or higher, and the rub fastness of the fabric in a wet state is grade 3 to 4 or higher, and Example 4 clears all of these standards. The fixing method of binding the fibers and rice polyphenol components via the mordant of the present invention is a more environmentally friendly and superior method than conventionally used chemical cationizing agents.

[0150] The textile product according to the present invention is an environmentally friendly and sustainable textile product that can be imbued with a functional component called rice polyphenol, extracted from defatted rice bran, which is a discarded food waste, and can express the functionality of the rice polyphenol component to become a superior functional product.

[0151] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0152] 1 cotton yarn 2. Ionicity (of the reactive groups of cotton yarn in the bath) 3. Mordants 4. Ionic properties (of mordants in the bath) 5. Rice polyphenol components 6. Ionic properties (of the reactive groups of rice polyphenol components in the bath) 10. Cationic agents 11 Ionicity (of the reactive group of the cationizing agent in the bath)

Claims

1. A textile product characterized by having a rice polyphenol component, a functional component extracted from defatted rice bran, applied to the fibers, thereby possessing the functionality of the said rice polyphenol component.

2. The textile product according to claim 1, characterized in that the functionality of the textile product is at least one of antioxidant, moisturizing, and antibacterial properties.

3. A textile product that has been processed with an ancillary processing agent prepared for imparting the rice polyphenol component to the fiber, characterized in that the ancillary processing agent contains an extract of the rice polyphenol component in a weight ratio of 0.01% by weight or more and 10.0% by weight or less of the total weight of the ancillary processing agent.

4. The textile product according to claim 1 or 2, characterized in that the ancillary processing agent prepared to impart the rice polyphenol component to the fiber is a two-liquid ancillary processing agent that is mixed during the ancillary processing.

5. The textile product according to claim 4, characterized in that it is processed with an ancillary processing agent in which the content of the extract containing the rice polyphenol component is 0.01% by weight or more and 20.0% by weight or less in weight ratio to the total weight of the appropriate mixing ratio of the two ancillary processing agents.

6. The textile product according to claim 1 or 2, characterized in that the rice polyphenol component is bonded to the fibers in the bath via a mordant.

7. A method for producing a textile product, characterized by first reacting a mordant with fibers in a bath, and then adding an extract containing a rice polyphenol component, which is a functional component extracted from defatted rice bran, to the bath containing the fibers that have reacted with the mordant, thereby binding the rice polyphenol component to the fibers.

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