Antibacterial / antiviral fiber, antibacterial / antiviral agent, and method for producing the same

Abstract

To provide an antibacterial / antiviral fiber, antibacterial / antiviral agent, and a method for producing the same capable of achieving antibacterial and antiviral properties while reducing environmental load.SOLUTION: A method for producing an antibacterial / antiviral fiber according to one aspect of the present invention is to produce an antibacterial / antiviral fiber by fixing a component of an antibacterial / antiviral agent to a fiber material. The production method comprises an extraction step for obtaining an extraction liquid containing no citral in lemon myrtle and containing polyphenol in the lemon myrtle by immersing lemon myrtle in hot water, and an extraction liquid immersion step for immersing the fiber material in the extraction liquid as an antibacterial / antiviral agent to fix components of the extraction liquid to the fiber material.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an antibacterial / antiviral fiber, an antibacterial / antiviral agent, and a method for producing the same. More specifically, the present invention relates to an antibacterial / antiviral fiber, an antibacterial / antiviral agent, and a method for producing the same, which use an extract of lemon myrtle. [Background technology]

[0002] Fibers having antibacterial or antiviral properties are known (for example, Patent Documents 1-3). Patent Document 1 aims to provide a fiber having an antibacterial agent that is applicable to fiber processing and has a low burden on the human body and the environment (

[0014] , Abstract). To solve this problem, Patent Document 1 (Abstract) provides the fiber with mainly antibacterial and deodorizing effects by applying a powder or hot water extract of Aloe arborescens, which is widely used as a health food and cosmetic, to the fiber surface. Aloe arborescens is derived from natural products, so it has a low burden on the environment and low side effects on the human body, and is also heat-resistant, so it can be used in dyeing and processing.

[0003] In Patent Document 2, the objective is to provide an antibacterial fiber that has excellent adhesion durability to fibers and is environmentally and biologically friendly (abstract). To solve this objective, the antibacterial fiber in Patent Document 2 (abstract) has a group formed by reacting an aldehyde group (-CHO) of an aliphatic or alicyclic aldehyde compound having 10 to 14 carbon atoms and a carbon-carbon double bond at its terminal with a hydroxyl group (-OH) in a fiber-forming polymer. That is, it is said that an antibacterial fiber that is excellent in durability and safety can be provided by reacting an "aliphatic or alicyclic aldehyde compound having 10 to 14 carbon atoms and a carbon-carbon double bond at its terminal," which is selected from among naturally occurring antibacterial agents as having a binding property with a specific fiber, with a hydroxyl group of the fiber (

[0007] ,

[0009] ,

[0013] ).

[0004] In Patent Document 3, the object is to provide a fiber that can easily impart both excellent antibacterial and antiviral properties to various fibers and fiber articles, and preferably, that is unlikely to lose both antibacterial and antiviral properties even when the fiber article is washed, and a fiber article containing such a fiber (abstract). To solve this object, Patent Document 3 (abstract) discloses that the antibacterial and antiviral processing agent contains an ion of at least one metal selected from metals belonging to Period 4, metals in Group 10, metals in Group 11, and metals in Group 12, and a complex containing a quaternary ammonium ion. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2008-231593 A [Patent Document 2] JP 2006-225780 A [Patent Document 3] JP 2017-088583 A Summary of the Invention [Problem to be solved by the invention]

[0006] As mentioned above, in Patent Document 1 (abstract), powder or hot water extract of Aloe arborescens is applied to the surface of a fiber to give the fiber an antibacterial and deodorizing effect. Since Aloe arborescens is derived from a natural product, it is expected that the burden on the environment and side effects on the human body are small. However, Patent Document 1 does not consider the antiviral properties.

[0007] Furthermore, Patent Document 2 claims that antibacterial fibers that are excellent in durability and safety can be provided by reacting a naturally derived antibacterial agent, "an aliphatic or alicyclic aldehyde compound having 10 to 14 carbon atoms and a carbon-carbon double bond at its terminal," with hydroxyl groups in the fiber (

[0007] ,

[0009] ,

[0013] ). However, Patent Document 2 does not consider antiviral properties.

[0008] Furthermore, in Patent Document 3 (abstract), the antibacterial and antiviral finishing agent includes a complex containing an ion of at least one metal selected from metals belonging to the 4th period, metals in Group 10, metals in Group 11, and metals in Group 12, and a quaternary ammonium ion. Patent Document 3 mentions a finishing agent having antibacterial and antiviral properties, and fibers and textile products using said finishing agent. However, since the finishing agent in Patent Document 3 is not of natural origin, there is room for improvement in terms of environmental impact, etc.

[0009] The above-mentioned issues are not limited to textiles or textile products, but also apply to other applications (e.g., antibacterial and antiviral agents and processed products).

[0010] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide an antibacterial and antiviral fiber, an antibacterial and antiviral agent, and methods for producing the same, which are capable of achieving antibacterial and antiviral properties while reducing the environmental impact. [Means for solving the problem]

[0011] The method for producing an antibacterial and antiviral fiber according to the present invention is a method for producing an antibacterial and antiviral fiber by fixing an antibacterial and antiviral agent component to a fiber material, comprising the steps of: an extraction step of immersing lemon myrtle in hot water to obtain an extract that does not contain citral in said lemon myrtle but contains polyphenols in said lemon myrtle; an extract soaking step in which the fiber material is soaked in the extract as an antibacterial and antiviral agent, and the components of the extract are fixed to the fiber material; The present invention is characterized by having the following.

[0012] According to the present invention, a hot water extract of lemon myrtle (hot water extract) is used as an antibacterial and antiviral agent. Since the extract is of natural origin (plant origin), it is possible to impart antibacterial and antiviral properties to textile materials while reducing the environmental impact.

[0013] In addition, the extraction of lemon myrtle components using hot water can be performed using an extraction container, a heating device, etc., and the immersion of the fiber material in the extract can be performed using an immersion container, etc. Therefore, it is possible to impart antibacterial and antiviral properties to the fiber material using simple equipment or devices, compared to, for example, component extraction by distillation.

[0014] Furthermore, the ingredients in the lemon myrtle extract are naturally derived, and lemon myrtle is consumed as herbal tea, so even if the lemon myrtle extract is to be discarded, the need for special waste disposal treatment (and the equipment or devices therefor) can be reduced.

[0015] Furthermore, according to the present invention, a fiber material is immersed in lemon myrtle extract to fix the extract components to the fiber material, which makes it easier to impart antibacterial and antiviral properties compared to the case where a binder resin or a crosslinking agent is used (e.g., Patent Document 2).

[0016] In addition, the inventors have confirmed that the lemon myrtle extract has antibacterial properties against Pseudomonas aeruginosa. Pseudomonas aeruginosa is not very dangerous to healthy individuals, but it is highly pathogenic to patients with weakened immune systems, and efforts to prevent hospital-acquired infections are ongoing. Therefore, antibacterial and antiviral fibers to which lemon myrtle extract is fixed as an antibacterial and antiviral agent are thought to have potential value as one of the means to prevent hospital-acquired infections of Pseudomonas aeruginosa in medical institutions in the future.

[0017] The components of the extract may include hyperoside (hyperin), isoquercetin (isoquercitrin), myricitrin and gallic acid.

[0018] In the extraction step, the lemon myrtle may be immersed in hot water of 85° C. or higher for 10 minutes or more to remove citral in the lemon myrtle and obtain the extract.

[0019] In the extract soaking step, the fiber material may be soaked in a solution of the extract and an acid to fix the components of the extract to the fiber material, thereby making it possible to strengthen the fixation of the components of the lemon myrtle extract to the fiber material.

[0020] The type of the fiber material may be natural fiber or chemical fiber, and the form of the fiber material may be thread, woven fabric, knitted fabric, nonwoven fabric, fabric, toweling, or sewn product.

[0021] The method may further include a dyeing step of dyeing the antibacterial and antiviral fiber after the extract immersion step, which makes it possible to change the color of the antibacterial and antiviral fiber while realizing the antibacterial and antiviral properties of the lemon myrtle extract components.

[0022] A method for producing an antibacterial and antiviral agent according to another embodiment of the present invention is a method for producing an antibacterial and antiviral agent that imparts antibacterial and antiviral properties to a textile material, comprising the steps of: The method includes an extraction step of soaking lemon myrtle in hot water to obtain an extract that does not contain citral in the lemon myrtle but contains polyphenols (flavonoids) in the lemon myrtle as an antibacterial and antiviral agent. It is characterized by:

[0023] In yet another embodiment of the present invention, there is provided an antibacterial and antiviral fiber having an extract of lemon myrtle fixed to an object, The extract of lemon myrtle contains hyperoside (hyperin), isoquercetin (isoquercitrin), myricitrin and gallic acid. It is characterized by:

[0024] An antibacterial and antiviral agent according to yet another embodiment of the present invention is a solution containing water and an extract of lemon myrtle, The extract of lemon myrtle contains hyperoside (hyperin), isoquercetin (isoquercitrin), myricitrin and gallic acid. It is characterized by the following.

Advantages of the Invention

[0025] According to the present invention, it is possible to exert antibacterial and antiviral effects while reducing the environmental load.

Brief Description of the Drawings

[0026] [Figure 1] FIG. 1 is a diagram showing the overall flow of a method for manufacturing antibacterial and antiviral fibers according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted. Further, the embodiments shown below are merely examples, and other known elements and alternative means can be adopted according to the use, purpose, scale, etc.

[0028] <A. One Embodiment> [A-1. Manufacturing Method] (A-1-1. Overall Flow) FIG. 1 is a diagram showing the overall flow of a method for manufacturing antibacterial and antiviral fibers 52 according to the present embodiment. Each step in FIG. 1 is an operation (manual work) by an operator (not shown). Alternatively, part or all of the steps in FIG. 1 may be automatically performed by a manufacturing apparatus (not shown).

[0029] Before starting step S11 in FIG. 1, the operator performs preliminary preparations. The preliminary preparations include, for example, the following. (1) Preparation of fiber material 50 (2) Preparation of lemon martle 60 (3) Preparation of acid 34 (for immersion) (4) Preparation of various facilities and equipment

[0030] The fiber material 50 is a fiber (target fiber) to which antibacterial and antiviral properties are to be imparted. The type of fiber material 50 is not particularly limited as long as it is a fiber that can be immersion processed, and it may be either a natural fiber or a chemical fiber. As the natural fiber, for example, a plant fiber (cotton, hemp, etc.) or an animal fiber (wool, silk, etc.) can be used. As the chemical fiber, a synthetic fiber (nylon, polyester, etc.), a regenerated fiber (rayon, etc.), or a semi-synthetic fiber (acetate, etc.) can be used. The form of the fiber material 50 can be, for example, a thread, a woven fabric, a knitted fabric, a nonwoven fabric, a cloth, a toweling material, or a sewn product (clothing, etc.).

[0031] In step S11 of FIG. 1, an operator immerses dried leaves of lemon myrtle 60 in hot water 30 to produce an extract 32 (extraction step). The water (hot water 30) can be, for example, tap water or groundwater. The extract 32 (hereinafter also referred to as "lemon myrtle extract 32") functions as an antibacterial and antiviral agent. Specifically, water and lemon myrtle 60 are placed in an extraction vessel 10, and the extraction vessel 10 is heated by a first heating device 12 to turn the water into hot water 30. Although only one dried leaf is shown in FIG. 1, multiple leaves may be placed in practice. Also, although the shape of the leaf is shown in FIG. 1, it is preferable to use the dried leaves in a crushed form in practice.

[0032] The hot water 30 is immersed for, for example, 10 minutes or more at a temperature of, for example, 85°C or higher. As a result, the extract 32 is obtained in a state in which most or all of the citral contained in the lemon myrtle 60 has been evaporated or removed due to its hydrophobicity. Therefore, the extract 32 contains almost no or no citral. Instead, the extract 32 contains, for example, hyperoside (hyperin), isoquercetin (isoquercitrin), myricitrin and gallic acid. Hyperoside (hyperin) and isoquercetin (isoquercitrin) are quercetin glycosides derived from lemon myrtle, and myricitrin is myricetin glycoside derived from lemon myrtle.

[0033] In step S12, the worker passes the lemon myrtle extract 32 through the filter 14 to separate the lemon myrtle 60 and place it in the soaking container 16 (filtration step).

[0034] In step S13, the worker immerses the textile material 50 in the lemon myrtle extract 32 in the immersion container 16 (immersion step). This causes the components of the extract 32 (antibacterial and antiviral agent) to adhere to the textile material 50, turning it into antibacterial and antiviral fiber 52 (hereinafter also referred to as "fiber 52"), and also dyes the fiber 52.

[0035] In this case, only the extraction liquid 32 may be used as the solution for performing the antibacterial and antiviral treatment on the textile material 50, but in this embodiment, a solution 36 obtained by adding an acid 34 to the extraction liquid 32 is used for soaking the textile material 50. By adding the acid 34, the components of the extraction liquid 32 are more firmly fixed to the textile material 50. By adding the acid 34, the pH of the solution 36 is preferably set to a range of 3.0 to 5.0.

[0036] Citric acid is used as the acid 34. Alternatively, the type of acid 34 may be an aliphatic organic acid, such as formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, caproic acid, oxalic acid, malonic acid, succinic acid, malic acid, maleic acid, tartaric acid, or fumaric acid.

[0037] The bath ratio (weight ratio of the solution 36 to the fiber material 50) can be changed depending on the specifications of the equipment used, such as the immersion container 16 and the second heating device 18. The immersion temperature can be, for example, 60° C. or higher, and the immersion time can be, for example, 10 minutes or longer. However, the immersion temperature and the immersion time can be appropriately adjusted depending on, for example, the type of the fiber material 50 or the degree of dyeing.

[0038] In the process of fixing the components of the lemon myrtle extract 32 (antibacterial and antiviral agent) to the textile material 50, the textile material 50 is dyed from light yellow to brown, so it can also be used as a vegetable dye. Alternatively, after fixing the components of the extract 32 to the textile material 50, a reactive dye or the like may be applied thereon to freely select a color. The antibacterial and antiviral effect is also expressed after dyeing on the components of the extract 32. To enjoy the color change of the vegetable dye, for example, a metal mordant of iron, aluminum, or titanium may be applied. In either case, it is possible to obtain a textile material 50 with fixed antibacterial and antiviral effects (resulting antibacterial and antiviral fiber 52).

[0039] In step S14, the worker cures the antibacterial and antiviral fiber 52 (curing step). Specifically, the antibacterial and antiviral fiber 52 is removed from the soaking container 16, and placed in the curing device 20, where the fiber 52 is heated. This makes it possible to further strengthen the adhesion of the components of the extract 32 to the fiber material 50. As a result, the antibacterial and antiviral effect of the fiber 52 can be improved. Note that in the case of cotton towels, curing can be omitted.

[0040] In step S15, the worker washes (soaps) the fabric surface of the fibers 52 (soaping step). Specifically, the fabric surface of the fibers 52 is washed with the cleaning liquid 40 (e.g., cold water, lukewarm water, or a surfactant) in the soaping container 22 to remove unnecessary matter attached to the fabric surface of the fiber material 50. The unnecessary matter here includes, for example, the components of the extraction liquid 32 that are not fixed to the fibers 52, or dirt. The cleaning liquid is selected, for example, according to the material of the fiber material 50.

[0041] In step S16, the worker dries the fibers 52 (drying process).

[0042] Through the above steps, the antibacterial and antiviral fiber 52 of this embodiment is completed.

[0043] (A-1-2. Additional information on Lemon Myrtle Extract 32) As described above, in the extraction step (S11 in FIG. 1), dried leaves of lemon myrtle 60 are soaked in hot water 30 to obtain an extract 32 (antibacterial and antiviral agent).

[0044] Lemon myrtle is rich in citral in its leaves and stems. The antibacterial and antiviral properties of citral are widely known, especially in Australia, where it originated, and it is used in foods, teas, detergents, etc. The oil obtained by distilling the dried leaves contains more than 90% citral, making lemon myrtle the most citral-containing plant oil.

[0045] However, citral is highly volatile and volatilizes even at room temperature. Also, citral is hardly soluble in water. Therefore, it is difficult to extract citral into an aqueous solution. In this embodiment, dried leaves of lemon myrtle 60 are immersed in hot water 30 to remove citral by promoting volatilization or hydrophobicity, and an extract 32 (antibacterial and antiviral agent) is obtained. That is, in this embodiment, citral in lemon myrtle 60 is removed, and other extracted components contained in lemon myrtle 60 are used as antibacterial and antiviral agents. As described above, the other extracted components include hyperoside (hyperin), isoquercetin (isoquercitrin), myricitrin, and gallic acid.

[0046] Although citral has strong antibacterial and antiviral properties, there is a problem that the unique scent of citral may cause unpleasant effects or harm to the human body. In this embodiment, by using hot water extraction, the citral contained in Lemon Myrtle 60 is deliberately removed (or not contained), and its concentration is reduced. This makes it possible to avoid the above-mentioned problems.

[0047] Lemon myrtle has also been consumed as herbal tea since ancient times. This means that hot water extracts of lemon myrtle are safe to take orally. Furthermore, such hot water extracts have a low risk of polluting the environment and do not require special disposal. Therefore, when lemon myrtle hot water extracts are used as antibacterial and antiviral agents for textiles, it makes it possible to manufacture textile products that are kind to both people and the earth.

[0048] [A-2. Examples of ingredients in Lemon Myrtle Extract 32] (A-2-1. Example of component analysis results) Table 1 shows an example of the component analysis results of lemon myrtle extract 32.

[0049] [Table 1]

[0050] According to Table 1, when extraction is performed for 10 to 60 minutes, the lemon myrtle extract 32 contains 24 to 28 parts by weight of isoquercitrin (isoquercetin), 81 to 88 parts by weight of myricitrin, and 33 to 52 parts by weight of gallic acid per 100 parts by weight of hyperoside. Here, the minimum value of the value obtained by dividing the numerical value of isoquercitrin, myricitrin, and gallic acid by the numerical value of hyperoside is rounded down to the nearest whole number, and the maximum value is rounded up to the nearest whole number. For example, in the case of parts by weight of isoquercitrin, of 24.6 (= 100 × 16 / 65), 26.1 (= 100 × 17 / 65), 27.5 (= 100 × 22 / 80), and 24.6 (= 100 × 20 / 81), the minimum value of 24.6 is rounded down to 24, and the maximum value of 27.5 is rounded up to 28.

[0051] Among the above-mentioned extract components, quercetin is expected to be effective against, for example, Staphylococcus aureus, drug-resistant Staphylococcus aureus, Pseudomonas aeruginosa, and influenza virus. Hyperoside (Hyperin) is expected to be effective against, for example, Pseudomonas aeruginosa. Isoquercetin (Isoquercitrin) is expected to be effective against, for example, Staphylococcus aureus and influenza virus. Myricetin, myricitrin, and gallic acid are expected to be effective against, for example, Staphylococcus aureus, Pseudomonas aeruginosa, and Klebsiella pneumoniae.

[0052] (A-2-2. Test conditions) The component analysis results in Table 1 were obtained under the following conditions.

[0053] (A-2-2-1. Sample) 2g of dried lemon myrtle (LM) leaves were crushed and added to 100ml of hot water, then filtered to obtain a solution (four patterns were prepared for each extraction time).

[0054] (A-2-2-2. Analysis method) Liquid Chromatography / Mass Spectrometry (LC / MS) LC equipment: Waters ACQUITY UPLC MS device: Waters SYNAPT G2-S Column: Waters ACQUITY UPLC BEH C18 (inner diameter 2.1 mm, length 100 mm) Column temperature: 40℃ Mobile phase A: 0.1% formic acid in water Mobile phase B: Acetonitrile %B:5(0-2min)→65(13.5mm)→100(15-20min) Flow rate: 0.4mL / min Detector: MS Ionization method, polarity: Electrospray ionization (ES I), Negative Measurement mass range: m / z 50-1200 Extracted ions: see Table 2 Sample injection volume: 0.2 μL Extract: Dilute with methanol and filter Standard solution: Water / methanol mixture or prepared with methanol

[0055] [Table 2]

[0056] [A-3. Example] (A-3-1. Overview of the Examples) Next, the antibacterial and antiviral properties of Examples 1 to 6 listed below were tested.

[0057] (A-3-1-1. Example 1) Immerse 10g of cotton fabric for dyeing test in 40℃ water containing 2ml of Monogen for 20 minutes, then wash with lukewarm water and dry with hot air. Prepare 4g of crushed dried lemon myrtle leaves and extract with 400ml of hot water (85-100℃) for 10 minutes. Filter the extract and add water to make 400ml to use as antibacterial and antiviral agent. Add 20g of Glauber's salt and 0.55g of citric acid to the antibacterial and antiviral agent obtained above to adjust the pH to 3.1, and immerse the test fabric in the processing solution. Heat to 80℃ and process for 10 minutes, then dry with hot air at 100℃, then iron at 140-160℃. Wash with cold water until no color comes out, then dry with hot air. By washing with lukewarm water containing added Monogen as described above and drying with hot air, fine dirt and impurities that may be attached to the fibers can be removed before the cotton fabric (fiber) is processed, and the antibacterial and antiviral agents can be fixed evenly.

[0058] (A-3-1-2. Example 2) Immerse 10g of cotton fabric for dyeing test in 40℃ water containing 2ml of Monogen for 20 minutes, then wash with lukewarm water and dry with hot air. Prepare 4g of crushed dried lemon myrtle leaves and extract with 400ml of hot water (85-100℃) for 20 minutes. Filter the extract and add water to make 400ml to use as antibacterial and antiviral agent. Add 20g of Glauber's salt and 0.5g of citric acid to the antibacterial and antiviral agent obtained above to adjust the pH to 3.1, and immerse the test fabric in the processing solution. Heat to 80℃ and process for 30 minutes, then dry with hot air at 100℃, and iron at 140-160℃. Wash with cold water until no color comes out, then dry with hot air.

[0059] (A-3-1-3. Example 3) Wash 10g of cotton towels in lukewarm water and iron mordant them in iron mordanting solution for 20 minutes. Prepare 0.7g of crushed dried lemon myrtle leaves and extract them in 400ml of hot water (85-100℃) for 20 minutes. After filtering, add water to make 400ml of the liquid, which is used as the antibacterial and antiviral agent. Immerse the cotton towel fabric in 400ml of the antibacterial and antiviral agent obtained above, heat it to 80℃, and process it for 30 minutes. After washing with water, immerse it again in the processing solution, heat it to 80℃, and process it for 30 minutes. Wash with cold water and hot water until the color disappears, and dry with hot air. Note that iron mordanting (or metal mordanting) before immersing in the antibacterial and antiviral agent allows you to enjoy the color change of the cotton towel and also strengthens the adhesion of the polyphenol components (flavonoid components) to the cotton towel fabric. Iron mordanting (or metal mordanting) can be done after or during immersion in the antibacterial and antiviral agent.

[0060] (A-3-1-4. Example 4) Immerse 20g of cotton fabric for dyeing test in 40℃ water containing 2ml of Monogen for 20 minutes, then wash with lukewarm water and dry with hot air. Prepare 8g of crushed dried lemon myrtle leaves and extract with 800ml of hot water (85-100℃) for 10 minutes. Add water to the filtered extract to make 800ml, and use it as the antibacterial and antiviral agent. Add 16g of Glauber's salt and 1g of citric acid to the antibacterial and antiviral agent obtained above to adjust the pH to 3.1 and use it as the processing solution. Immerse the test fabric in the processing solution, heat it to 80℃, and process it for 30 minutes. Dry with hot air at 100℃ and iron at 140-160℃. Wash with cold and hot water until the color does not come out. Dissolve 1g of Remazol in 400ml of water, dissolve 28g of Glauber's salt in it, and immerse the fabric in the dyeing solution heated to 60℃ for 30 minutes. Add 8g of soda ash and dye again at 60℃ for 60 minutes. After rinsing with cold water, dissolve 2ml of fixative in 400ml of water, heat to 60℃, add the fabric and fix for 15 minutes. After rinsing, soap with hot water for 10 minutes, rinse again and dry with hot air.

[0061] (A-3-1-5. Example 5) 10g of polyester for dyeing test is immersed in 40℃ water containing 2ml of Monogen for 20 minutes, washed with lukewarm water and dried with hot air. 8g of crushed dried lemon myrtle leaves are extracted with 400ml of hot water (85-100℃) for 10 minutes. Water is added to the extracted liquid after filtering, and the liquid is made into 800ml, which is used as the antibacterial and antiviral agent. 20g of Glauber's salt and 1g of citric acid are added to the antibacterial and antiviral agent obtained above, and the pH is adjusted to 3.2 to make the processing solution. The test fabric is immersed in the processing solution, heated to 126℃, and processed for 60 minutes under a pressure of 140hPa, then dried with hot air at 100℃ and ironed at 140-160℃. Soaped with 400ml of soaping agent dissolved in 100℃ hot water for 10 minutes, washed with warm water, cold water, and dried with hot air.

[0062] (A-3-1-6. Example 6) Immerse 20g of nylon for dyeing tests in 40°C water containing 2ml of Monogen for 20 minutes, then wash with lukewarm water and dry with hot air. Prepare 16g of crushed dried lemon myrtle leaves and extract with 800ml of hot water (85-100°C) for 10 minutes. Filter and add water to make 800ml of the liquid to use as the antibacterial and antiviral agent. Add 40g of Glauber's salt and 1g of citric acid to the antibacterial and antiviral agent obtained above and adjust the pH to 3.1 to use as the processing solution. Immerse the test fabric in the processing solution, heat to 90°C, process for 30 minutes, then dry with hot air at 100°C. Wash with cold and hot water until no color comes out, then dry with hot air.

[0063] (A-3-2. Antibacterial test results) (A-3-2-1. Common conditions) Test method: Japan Industrial Standards (JIS) L1902:2015 Bacterial liquid absorption method Test strain: Staphylococcus aureus NBRC 12732 Washing method: According to the washing method (standard washing method) of the Textile Evaluation Technology Council SEK Mark textile products

[0064] (A-3-2-2. Conditions and antibacterial test results of Example 1) Fiber type: JIS L 0803 compliant cotton fabric for color fastness Extraction time: 10 minutes Immersion time: 10 minutes

[0065] [Table 3]

[0066] (A-3-2-3. Conditions and antibacterial test results of Example 2) Fiber type: JIS L 0803 compliant cotton fabric for color fastness Extraction time: 20 minutes Immersion time: 30 minutes

[0067] [Table 4]

[0068] (A-3-2-4. Conditions and antibacterial test results of Example 3) Fiber Type: 100% cotton towel Extraction time: 20 minutes Immersion time: 30 minutes

[0069] [Table 5]

[0070] (A-3-2-5. Conditions and antibacterial test results of Example 4) Fiber type: JIS L 0803 compliant cotton fabric for color fastness Extraction time: 10 minutes Processing time 30 minutes Staining: Reactive staining with Remazol for 90 minutes

[0071] [Table 6]

[0072] (A-3-2-6. Conditions and antibacterial test results of Example 5) Fiber type: Polyester fabric for color fastness conforming to JIS L 0803 Extraction time: 10 minutes Processing time 60 minutes

[0073] [Table 7]

[0074] (A-3-2-7. Conditions and antibacterial test results of Example 6) Fiber type: Nylon 6 taffeta for dyeing test Extraction time: 10 minutes Processing time 30 minutes

[0075] [Table 8]

[0076] (A-3-3. Antiviral test results) (A-3-3-1. Common conditions) Test method: JIS L1922 Plaque measurement method Test virus: Influenza A virus (H3N2) A / Hong Kong / 8 / 68; TC adapted ATCC VR-1679 Host cells: MDCK cells (canine kidney-derived cells) Washing method: According to the washing method (standard washing method) of the Textile Evaluation Technology Council SEK Mark textile products Abbreviation in the table: PFU: forming plaque units Antiviral activity value Mv = lg(Va)-lg(Vc) Decrease value M = lg(Va)-lg(Vb) (Test validity condition: Decrease value M≦1.0) Note: Data from Examples 2 and 5 are not available in this study.

[0077] (A-3-3-2. Conditions of Example 1 and Antiviral Test Results) Fiber type: JIS L 0803 compliant cotton fabric for color fastness

[0078] [Table 9]

[0079] (A-3-3-3. Conditions and antiviral test results of Example 3) Fiber Type: 100% cotton towel

[0080] [Table 10]

[0081] (A-3-3-4. Conditions and antiviral test results of Example 4) Fiber type: JIS L 0803 compliant cotton fabric for color fastness Dyeing: Processed with lemon myrtle extract, then reactive dyed with Remazol for 60 minutes

[0082] [Table 11]

[0083] (A-3-3-5. Conditions and antiviral test results of Example 6) Fiber type: nylon 6 taffeta for dyeing test

[0084] [Table 12]

[0085] (A-3-4. Antibacterial test results (other than Staphylococcus aureus)) (A-3-4-1. Common conditions) Test method: JIS L1902:2015 Bacterial liquid absorption method Test strain: Klebsiella pneumoniae NBRC 13277 Pseudomonas aeruginosa NBRC 3080 MRSA·Methicillin resistant Staphylococcus aureus IID1677 Washing method: According to the washing method (standard washing method) of the Textile Evaluation Technology Council SEK Mark textile products

[0086] (A-3-4-2. Conditions of Example 3 and Antibacterial Test Results (Klebsiella pneumoniae)) Test strain: Klebsiella pneumoniae NBRC 13277 Fiber Type: 100% cotton towel Extraction time: 20 minutes Immersion time: 30 minutes

[0087] [Table 13]

[0088] (A-3-4-3. Conditions of Example 3 and antibacterial test results (MRSA)) Test strain: MRSA·Methicillin resistant Staphylococcus aureus IID1677 Fiber type: 100% cotton towel Extraction time: 20 minutes Immersion time: 30 minutes

[0089] [Table 14]

[0090] (A-3-4-4. Conditions of Example 6 and antibacterial test results (Pseudomonas aeruginosa)) Test strain: Pseudomonas aeruginosa NBRC 3080 Fiber type: Nylon 6 taffeta for dyeing test Extraction time: 10 minutes Immersion time: 30 minutes

[0091] [Table 15]

[0092] (A-3-5. Antibacterial test results (by processing time)) As a result of investigating the lower limit of the extraction and soaking processing time required to impart antibacterial effect, it was shown that a sufficiently high effect was obtained with 10 minutes or more for each, and that the effect was also durable to washing. Test method: JIS L1902:2015 Bacterial liquid absorption method Test strain: Staphylococcus aureus NBRC 12732 Washing method: According to the washing method (standard washing method) of the Textile Evaluation Technology Council SEK Mark textile products Fiber type: JIS L 0803 compliant cotton fabric for color fastness Extraction method: 8g of dried lemon myrtle leaves crushed into 1.6mm cubes were placed in 400ml of water, and once the water reached over 90℃, it was extracted for the appropriate amount of time, then filtered. Adjustment of the extract: Add water to the above extract to make 400ml of liquid, dissolve 20g of Glauber's salt, add citric acid, and adjust the pH of the extract to 3.1. Immersion time 10 g of the above test cloth was placed in the extraction liquid and immersed for the specified time at 70°C or higher.

[0093] [Table 16]

[0094] (A-3-6. Antiviral properties: Effect of adding Glauber's salt and heat) In order to enhance the antiviral effect on cotton fabric, it is effective to dissolve Glauber's salt during the soaking process, and the test results showed that the effect is enhanced by curing after soaking and before soaping. Extraction method: 4g of dried lemon myrtle leaves crushed into 1.6mm cubes were placed in 200ml of water, and extracted for 20 minutes after the water became hotter than 90℃, then filtered. Preparation of the extract: Case 1: Water was added to the above extract to make 400 ml of liquid, and citric acid was added to adjust the pH of the extract to 3.1. Case 2: Water was added to the above extract to make 400 ml of liquid, 20 g of Glauber's salt was dissolved in it, and then citric acid was added to adjust the pH of the extract to 3.2. Case 3: Water was added to the above extract to make 400 ml of liquid, 20 g of Glauber's salt was dissolved in it, and citric acid was added to adjust the pH of the extract to 3.3. Immersion time: 10 g of the above test cloth was placed in the extraction solution and immersed at 70°C or higher for 30 minutes. Post-immersion treatment: Case 1: The test cloth was washed repeatedly with cold and hot water and then dried with hot air. Case 2: The test cloth was washed repeatedly with cold and hot water and then dried with hot air. Case 3: The test cloth was dried with hot air, ironed, washed repeatedly with cold and hot water, dried with hot air again, and ironed. Fiber type: JIS L 0803 compliant cotton fabric for color fastness

[0095]

Table 17

[0096] Test method: JIS L1922 plaque measurement method Test virus: Influenza A virus (H3N2) A / Hong Kong / 8 / 68; TC adapted ATCC VR-1679 Host cell: MDCK cells (dog kidney-derived cells) Washing method: According to the washing method of SEK Mark textile products (standard washing method) by the Textile Evaluation Technology Council of Japan Abbreviations in the table: PFU: plaque forming units Antiviral activity value Mv = lg(Va) - lg(Vc) Reduction value M = lg(Va) - lg(Vb) (Test establishment condition: reduction value M ≤ 1.0)

[0097] <B. Modification example> Note that the present invention is not limited to the above-described embodiments, and it is of course possible to adopt various configurations or methods based on the description in this specification. For example, the following configurations or methods can be adopted.

[0098] In the above embodiment, the dried leaves of Lippia citriodora 60 were used in the extraction step (S11 in FIG. 1). However, for example, from the viewpoint of using the extraction components of Lippia citriodora 60 by hot water as an antibacterial and antiviral agent, not limited to this, instead of the dried leaves, non-dried leaves may be used. Or, dried or non-dried stems may be used.

[0099] In the above embodiment, a filtration step (S12) was provided after the extraction step (S11 in FIG. 1). However, for example, from the viewpoint of using the extraction components of Lippia citriodora 60 by hot water as an antibacterial and antiviral agent, not limited to this, it is also possible to omit the filtration step.

[0100] In the immersion step (S13 in FIG. 1) of the above embodiment, immersion was performed using the immersion container 16 shown in FIG. 1. However, for example, from the viewpoint of using the extracted components of lemon myrtle 60 by hot water as an antibacterial and antiviral agent, other immersion methods or immersion devices can be used. For example, a device generally used for dyeing (dyeing device) may be used as the immersion device. As such a dyeing device, for example, a wince dyeing machine, a jigger (jigger dyeing machine), or a liquid jet dyeing machine may be used. Alternatively, a device performing a pad-steam method, a pad-dry-steam method, or a pad-dry-bake method may be used in the immersion step. [Explanation of symbols]

[0101] 10...Extraction container 12...First heating device 14...Filter 16...Immersion container 18: Second heating device 20: Curing device 22...Soaping container 30...Hot water 32...Lemon myrtle extract 34...Acid 36... Immersion solution 40... Cleaning solution 50...Textile material 52...Antibacterial and antiviral fiber 60…Lemon myrtle

Claims

1. A method for producing an antibacterial and antiviral fiber by fixing an antibacterial and antiviral agent component to a fiber material, comprising the steps of: an extraction step of immersing lemon myrtle in hot water to obtain an extract that does not contain citral in said lemon myrtle but contains polyphenols in said lemon myrtle; an extract soaking step in which the fiber material is soaked in the extract as an antibacterial and antiviral agent to fix components of the extract to the fiber material; 1. A method for producing an antibacterial and antiviral fiber, comprising the steps of:

2. The method for producing the antibacterial and antiviral fiber according to claim 1, The components of the extract include hyperoside, isoquercetin, myricitrin and gallic acid. A method for producing antibacterial and antiviral fibers comprising the steps of:

3. The method for producing the antibacterial and antiviral fiber according to claim 1 or 2, In the extraction step, the lemon myrtle is immersed in hot water of 85° C. or higher for 10 minutes or more to remove the citral in the lemon myrtle and obtain the extract. A method for producing antibacterial and antiviral fibers comprising the steps of:

4. The method for producing the antibacterial and antiviral fiber according to claim 1 or 2, In the extraction liquid immersion step, the fiber material is immersed in a solution of the extraction liquid and an acid, so that the components of the extraction liquid are fixed to the fiber material. A method for producing antibacterial and antiviral fibers comprising the steps of:

5. The method for producing the antibacterial and antiviral fiber according to claim 1 or 2, The type of the fiber material is a natural fiber or a chemical fiber, The fiber material may be in the form of a thread, a woven fabric, a knitted fabric, a nonwoven fabric, a cloth, a toweling material, or a sewn product. A method for producing antibacterial and antiviral fibers comprising the steps of:

6. The method for producing the antibacterial and antiviral fiber according to claim 1 or 2, The method further includes a dyeing step of dyeing the antibacterial and antiviral fiber after the extract immersion step. A method for producing antibacterial and antiviral fibers comprising the steps of:

7. A method for producing an antibacterial and antiviral agent that imparts antibacterial and antiviral properties to an object, comprising the steps of: The method includes an extraction step of soaking lemon myrtle in hot water to obtain an extract that does not contain citral in the lemon myrtle but contains polyphenols in the lemon myrtle as an antibacterial and antiviral agent. A method for producing an antibacterial and antiviral agent, comprising the steps of:

8. An antibacterial and antiviral fiber in which an extract of lemon myrtle is fixed to a fiber material, The extract of lemon myrtle contains hyperoside, isoquercetin, myricitrin and gallic acid. An antibacterial and antiviral fiber.

9. An antibacterial and antiviral agent in the form of a solution containing water and an extract of lemon myrtle, The extract of lemon myrtle contains hyperoside, isoquercetin, myricitrin and gallic acid. An antibacterial and antiviral agent characterized by:

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