An antibacterial and bacteriostatic bag fabric integrating a mixture of mugwort extract.

Abstract

This invention discloses an antibacterial and antifungal bag fabric integrating a mixture of Artemisia argyi extract and other materials, belonging to the field of fabric technology. It comprises a main yarn and an adhesive layer bonded to the outer surface of the main yarn; it includes an inner yarn embedded in the inner surface of the main yarn, and a release layer connected to the outer surface of the main yarn via the adhesive layer. The release layer is further connected to an anti-fouling coating via a wear-resistant and anti-fouling mechanism. This antibacterial and antifungal bag fabric integrating the Artemisia argyi extract and other materials features a main yarn and inner yarn with multiple strands. The retention effect of the Artemisia argyi extract is improved through the slow-release particles and dyeing material on the inner yarn. Combined with the wear-resistant yarn and reinforcing yarn, and the release layer, the Artemisia argyi extract is effectively released bidirectionally, thereby controlling the antibacterial and antifungal effect and increasing the service life of the bag fabric.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, specifically to an antibacterial and bacteriostatic bag fabric that integrates a mixture of Artemisia argyi extract. Background Technology

[0002] Bag fabrics are multi-layered composite fabrics made from modern textile materials. They are easy to incorporate into the inner layers of suitcases, handbags, and other bags, facilitating the storage of items. The material properties of the bag fabric can be enhanced to improve various functions; for example, artemisia extract can be added to the fabric for added benefits. However, controlling the cleanliness of the bag fabric during use is difficult. If internal contamination occurs, the dyed materials, if used for a long time, are difficult to disinfect, easily leading to bacterial growth throughout the bag and compromising safety.

[0003] To overcome the aforementioned shortcomings, existing technology (Chinese patent application CN202322562638.1, filed on 2023-09-21) provides an antibacterial fabric. Through a designed antibacterial mechanism, silver ion antibacterial filling cotton is filled into the filling cavity within the base cotton fabric during use. This silver ion antibacterial filling cotton provides antibacterial protection to the interior of the fabric body, and can be removed and replaced as needed. Furthermore, through a designed silver fiber textile thread, silver fiber textile threads are sewn onto the composite copper ion fiber antibacterial fabric and the base cotton fabric during use. The antibacterial effect of the silver fiber textile thread reduces bacterial growth and ensures the antibacterial properties of the composite copper ion fiber are maintained. The connection between the bacterial fabric and the base cotton fabric is stable; there is also existing technology (Chinese patent application No. CN202120640195.1, application date 2021-03-29) of an antibacterial and bacteriostatic clothing fabric, in which hollow strips are set, which can improve the stability of the hollow tube, reduce the deformation of the hollow tube, and thus reduce the overall wrinkle resistance, thereby reducing the occurrence of wrinkles in the fabric; the set cushioning cover can buffer the impact force on the hollow tube when it is subjected to lateral compression, thereby reducing the deformation of the internal structure of the fabric due to compression, thereby improving the wrinkle resistance of the wrinkle-resistant layer; and existing technology (application No. CN202120115067.5) (Chinese patent application filed on January 16, 2021) A fire-resistant and antibacterial fabric for bags and luggage, using canvas as the base layer, is a relatively thick cotton fabric with a plain weave, making it sturdy, durable, and structurally strong. An abrasion-resistant layer is interwoven on the surface of the fabric, made of nylon fiber, a synthetic fiber spun from a high-molecular polymer containing amide bonds in its main chain. Commonly known as nylon, it has extremely high strength and abrasion resistance, is not easily torn or scratched, and can effectively protect bags and luggage. Inside the fabric are interwoven fire-resistant layers A and B. Fire-resistant layer A is made of basalt fiber fire-resistant cloth, a textile fabric processed from single basalt fiber yarns. Non-flammable, high-temperature resistant, densely structured, and tough, it exhibits excellent fire resistance and high-temperature resistance, enhancing the fire resistance of bags. The fireproof layer B is made of ceramic fireproof cloth, a fibrous, lightweight fire-resistant material with advantages such as light weight, high temperature resistance, good thermal stability, low thermal conductivity, low specific heat, and resistance to mechanical vibration, which can further improve the flame retardancy of bag fabrics. Although existing technologies can complete the production of bag fabrics, it is difficult to stably mix the artemisia extract into the fabric threads during the process. Furthermore, re-dyeing the fabric after production can easily affect the disinfection effect during use, and the release is relatively fast, making it difficult to control the duration of use. In addition, its external contact with solid materials is prone to damage.

[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the existing stainless steel mixing tanks used for electroplating additives. Summary of the Invention

[0005] The purpose of this invention is to provide an antibacterial and bacteriostatic bag fabric that integrates mugwort extract mixture to solve the problems mentioned in the background art, such as the difficulty in stably mixing mugwort extract into the bag fabric threads during the working process, the easy impact of re-dyeing the fabric after production on the disinfection effect during use, the rapid release of the extract making it difficult to control the duration of use, and the easy damage to the external solid materials.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an antibacterial and bacteriostatic bag fabric integrating a mixture of Artemisia argyi extract, comprising a main yarn and an adhesive layer 1 bonded to the outer surface of the main yarn; including: an inner yarn, built into the inner surface of the main yarn, and a release layer 1 connected to the outer surface of the main yarn through the adhesive layer 1, and the release layer 1 being connected to an anti-fouling coating through a wear-resistant and anti-fouling mechanism; simultaneously, an adhesive layer 4 is bonded to the lower surface of the main yarn, and a release layer 2 is bonded to the main yarn through the adhesive layer 4, and the release layer 2 being connected to an wear-resistant coating through a wear-resistant protective mechanism.

[0007] Preferably, the main wire and the inner wire form an embedded structure, and the main wire forms an adhesive structure with the release layer through an adhesive layer one. The outer surface of the release layer one is provided with a release hole one, and the antibacterial and bacteriostatic material is released through the release hole one.

[0008] Preferably, the wear-resistant and anti-fouling mechanism further includes an adhesive layer two bonded to the upper surface of the release layer one, and wear-resistant yarn one bonded to the upper surface of the adhesive layer two, and wear-resistant yarn two woven to the outer surface of the wear-resistant yarn one, while an adhesive layer three bonded to the outer surface of the wear-resistant yarn two, and an anti-fouling coating bonded to the upper surface of the adhesive layer three.

[0009] Preferably, the first release layer is bonded to the first and second wear-resistant filaments via the second adhesive layer, and the first and second wear-resistant filaments are bonded to the anti-fouling coating via the third adhesive layer, and the holes in the anti-fouling coating are the same size as the first release hole in the first release layer.

[0010] Preferably, the main wire is bonded to the release layer two through the adhesive layer four, and the release layer two has a release hole two on its inner surface, and the inner diameter of the release hole two is smaller than the inner diameter of the release hole one.

[0011] Preferably, the wear-resistant protective mechanism further includes an adhesive layer five bonded to the lower surface of the release layer two, and the outer surface of the adhesive layer five is bonded to the woven reinforcing yarn one and reinforcing yarn two, and the lower surfaces of the reinforcing yarn one and reinforcing yarn two are compositely bonded with a wear-resistant coating, while the main yarn gap is bonded with a slow-release particle one.

[0012] Preferably, the second release layer is reinforced by the fifth adhesive layer and the first and second reinforcing threads to form a reinforced structure, and the first and second reinforcing threads are bonded to the wear-resistant coating to form a wear-resistant structure. The pore size of the wear-resistant coating is the same as that of the second release hole. At the same time, the main thread is used to store the first slow-release particles, and the first slow-release particles retain the Artemisia argyi extract through microencapsulation technology.

[0013] Preferably, the inner surface of the inner filament further includes an outer membrane, and the inner surface of the outer membrane has irregular pores. A first filament is attached to the inner surface of the outer membrane, and a second filament is attached to the inner surface of the first filament. Meanwhile, the outer surface of the second filament contains a second slow-release particle and a dyeing material. A third filament is attached to the inner surface of the second filament, and the second slow-release particle retains the Artemisia argyi extract through microencapsulation technology.

[0014] Preferably, the inner silk thread forms a release structure through the outer membrane and irregular pores, and the outer membrane and the first silk thread form a wrapping structure to improve the release of Artemisia argyi extract when the inner silk thread is used.

[0015] Preferably, the first filament forms a sandwich structure with the second filament and the slow-release particles, and the second filament forms an impregnation structure with the third filament through the impregnation material.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This antibacterial and bacteriostatic bag fabric, which integrates mugwort extract mixture, features a main thread and inner thread with multiple strands of yarn. The retention effect of mugwort extract is improved through the slow-release particles and dyeing materials on the inner thread. In conjunction with the abrasion-resistant yarn and the reinforcing yarn, as well as the release layer and the release layer, the mugwort extract is effectively released in both directions, thereby controlling the antibacterial and bacteriostatic effect and increasing the service life of the bag fabric.

[0017] 2. This antibacterial and antimicrobial bag fabric, which integrates mugwort extract, features a wear-resistant and stain-resistant structure. This structure facilitates the coordination of wear-resistant yarns (first and second) assembled from the main yarn, effectively enhancing wear resistance. Combined with the slow-release layer, it improves the release effect, prevents rapid release in a short time, increases release stability, and enhances the release stability within the bag fabric. Furthermore, it incorporates a wear-resistant protective structure, which uses reinforcing yarns (first and second) bonded together with the main yarn to adhere a wear-resistant coating. This improves the stability of the bag fabric's exterior in contact with the suitcase, reducing wear. The small-diameter release holes of the slow-release layer prevent bacteria from remaining between the bag fabric and the suitcase body, avoiding internal contamination.

[0018] 3. This antibacterial and antimicrobial bag fabric, which integrates a mixture of Artemisia argyi extract and other materials, features a main yarn with nested inner yarns. The inner yarns are reinforced by an outer membrane to increase stability during weaving and reduce breakage. Irregular pores in the outer membrane prevent interference with the release of the second type of slow-release particles. Furthermore, the inner yarns are connected to a first yarn and a second yarn to effectively control the retention of the second type of slow-release particles. A third yarn is used to impregnate the material, improving the retention of the Artemisia argyi extract mixture. The fabric layer formed by the main yarns, with its nested slow-release particles, further enhances the antibacterial and antimicrobial effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the bag fabric of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the main wire in half section view of the present invention; Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the main wire of the present invention; Figure 4 This is a three-dimensional structural diagram of the main wire and the wear-resistant wire of the present invention; Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the antifouling coating of the present invention; Figure 6 This is a partial cross-sectional three-dimensional structural diagram of the wear-resistant coating of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the third filament of the present invention; Figure 8 For the present invention Figure 7 Enlarged 3D structural diagram at point A.

[0020] In the diagram: 1. Main filament; 2. Inner filament; 3. Adhesive layer one; 4. Release layer one; 5. Release hole one; 6. Adhesive layer two; 7. Abrasion-resistant filament one; 8. Abrasion-resistant filament two; 9. Adhesive layer three; 10. Anti-fouling coating; 11. Adhesive layer four; 12. Release layer two; 13. Release hole two; 14. Adhesive layer five; 15. Reinforcing filament one; 16. Reinforcing filament two; 17. Slow-release particles one; 18. Abrasion-resistant coating; 19. Outer membrane; 20. Irregular pores; 21. First filament; 22. Second filament; 23. Slow-release particles two; 24. Impregnated material; 25. Third filament. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-8 The present invention provides a technical solution: an antibacterial and bacteriostatic bag fabric integrating mugwort extract mixture, which is provided with a main yarn 1 and an adhesive layer 3 bonded to the outer surface of the main yarn 1.

[0023] Example 1: As Figures 1-8 The present invention provides the following technical solution: an antibacterial and bacteriostatic bag fabric integrating mugwort extract mixture, comprising: an inner yarn 2, built into the inner surface of the main yarn 1, and the outer surface of the main yarn 1 is connected to a release layer 4 through an adhesive layer 3, and the release layer 4 is connected to an anti-fouling coating 10 through a wear-resistant and anti-fouling mechanism; at the same time, an adhesive layer 4 11 is adhesively connected to the lower surface of the main yarn 1, and the main yarn 1 is adhesively connected to a release layer 2 12 through the adhesive layer 4 11, and the release layer 2 12 is connected to an wear-resistant coating 18 through a wear-resistant protective mechanism.

[0024] During use, the inner thread 2 assembled by the main thread 1 improves the retention effect of the mugwort extract mixture, the release layer 4 assembled by the main thread 1 improves the release stability, the anti-fouling coating 10 assembled by the main thread 1 improves the anti-fouling effect, and the release layer 12 and the wear-resistant coating 18 assembled by the main thread 1 provide external protection and release effect, avoiding the retention of bacteria between the bag and the fabric, and increasing the safety of use.

[0025] Example 2: Figures 1-6 The technical solution shown, based on Embodiment 1, further discloses a solution to the problem of difficulty in stably mixing Artemisia argyi extract into the yarn of bag fabric, and the problem that re-dyeing the fabric after production can easily affect the disinfection effect during use. The specific details are as follows: the main yarn 1 and the inner yarn 2 form an embedded structure, and the main yarn 1 is bonded to the release layer 4 via an adhesive layer 3. The outer surface of the release layer 4 has release holes 5 through which antibacterial and bacteriostatic materials are released; for example... Figure 4 , Figure 5 and Figure 6 As shown, the wear-resistant and anti-fouling mechanism also includes an adhesive layer 2 6 bonded to the upper surface of the release layer 1 4, and wear-resistant yarn 1 7 is bonded to the upper surface of adhesive layer 2 6. Wear-resistant yarn 2 8 is woven to the outer surface of wear-resistant yarn 1 7, and an adhesive layer 3 9 is bonded to the outer surface of wear-resistant yarn 2 8. An anti-fouling coating 10 is bonded to the upper surface of adhesive layer 3 9. Figure 4 , Figure 5 and Figure 6As shown, release layer 4 is bonded to wear-resistant filaments 7 and 8 via adhesive layer 6, and wear-resistant filaments 7 and 8 are bonded to anti-fouling coating 10 via adhesive layer 3 9. The holes in anti-fouling coating 10 are the same size as the release holes 5 in release layer 4. Figure 4 , Figure 5 and Figure 6 As shown, the main wire 1 is bonded to the release layer 2 12 via the adhesive layer 4 11, and the inner surface of the release layer 2 12 is provided with a release hole 2 13, the inner diameter of which is smaller than the inner diameter of the release hole 1 5; as shown Figure 4 , Figure 5 and Figure 6 As shown, the wear-resistant protective mechanism also includes an adhesive layer 14 bonded to the lower surface of the release layer 2 12, and the outer surface of the adhesive layer 14 is bonded with woven reinforcing yarn 15 and reinforcing yarn 2 16. The lower surfaces of the reinforcing yarn 15 and reinforcing yarn 2 16 are compositely connected with a wear-resistant coating 18, and slow-release particles 17 are bonded to the gaps in the main yarn 1. Figure 4 , Figure 5 and Figure 6 As shown, the second release layer 12 forms a reinforced structure with the first reinforcing filament 15 and the second reinforcing filament 16 through the fifth adhesive layer 14. The first reinforcing filament 15 and the second reinforcing filament 16 form a wear-resistant structure bonded to the wear-resistant coating 18. The pore size of the wear-resistant coating 18 is consistent with the pore size of the second release hole 13. At the same time, the main filament 1 is used to store the slow-release particles 17. The slow-release particles 17 retain the Artemisia argyi extract through microencapsulation technology.

[0026] In use, a release layer 4 is assembled on the outer surface of the main fabric layer formed by the main yarn 1 through an adhesive layer 3. The main yarn 1 is made of polyester fiber material, and release holes 5 in the release layer 4 release antibacterial and antimicrobial materials into the interior of the bag fabric. The release layer 4 is also made of polyester fiber material. Abrasion-resistant yarns 7 and 8 are assembled through an adhesive layer 6 connected to the release layer 4, forming an abrasion-resistant layer. This abrasion-resistant layer is made of polyester fiber material, and an anti-fouling coating 10 is assembled through an adhesive layer 9 connected to the outside of the abrasion-resistant layer. The anti-fouling coating 10 is made of cotton fiber, improving the abrasion resistance and anti-fouling effect inside the bag. An adhesive layer 11 connected to the main yarn 1 further enhances the anti-fouling effect. The second release layer 12 is made of polyester fiber material and has release holes 13 to release a low dose of Artemisia argyi extract, improving the cleanliness between the bag and the fabric and enhancing the convenient disinfection effect. The second release layer 12 connects to the externally bonded reinforcing threads 15 and 16 of the fifth adhesive layer 14 to form a reinforcing layer. The reinforcing threads 15 and 16 are made of polyester fiber material, which improves the external stability of the fabric and prevents deformation. At the same time, the wear-resistant coating 18 connected to it improves the wear resistance. The wear-resistant coating 18 is made of cotton and polyester fiber blend and is combined with the slow-release particles 17 between the main threads 1 to improve the release stability of the Artemisia argyi extract.

[0027] Example 3: Figure 7 and Figure 8 The technical solution shown, based on Embodiment 2, further discloses the retention stability of Artemisia argyi extract, increases the amount of Artemisia argyi extract retained, and extends the usage time, solving the problems of rapid release, difficulty in controlling the usage time, and easy damage to the external solid materials. The specific details are as follows: The inner surface of the inner thread 2 also includes an outer membrane 19, and the inner surface of the outer membrane 19 has irregular holes 20. A first thread 21 is attached to the inner surface of the outer membrane 19, and a second thread 22 is attached to the inner surface of the first thread 21. Simultaneously, a second slow-release particle 23 is impregnated on the outer surface of the second thread 22, and a dyeing material 24 is impregnated on the outer surface of the second thread 22. A third thread 25 is attached to the inner surface of the second thread 22, and the second slow-release particle 23 retains the Artemisia argyi extract through microencapsulation technology. Figure 7 and Figure 8 As shown, the inner silk thread 2 forms a release structure through the outer membrane 19 and the irregular pores 20, and the outer membrane 19 and the first silk thread 21 form a wrapping structure to improve the release of Artemisia argyi extract when the inner silk thread 2 is used; Figure 7 and Figure 8As shown, the first filament 21 forms a sandwich structure with the second filament 22 and the slow-release particles 23, and the second filament 22 forms an impregnation structure with the third filament 25 through the impregnation material 24.

[0028] When the main thread 1 is used, it will be used in conjunction with the outer membrane 19 contained in the inner thread 2 to wrap the first thread 21, the second thread 22 and the third thread 25. The use of the outer membrane 19 increases the stability of the release of the mugwort extract for disinfection. In addition, the slow-release particles 23 between the first thread 21 and the second thread 22 and the impregnation material 24 between the second thread 22 and the third thread 25 further increase the retention of the mugwort extract and increase the service life.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An antibacterial and antimicrobial bag fabric integrating mugwort extract mixture, comprising a main yarn (1) and an adhesive layer (3) bonded to the outer surface of the main yarn (1). Its features are, include: The inner wire (2) is built into the inner surface of the main wire (1), and the outer surface of the main wire (1) is connected to the release layer (4) through the adhesive layer (3), and the release layer (4) is connected to the anti-fouling coating (10) through the wear-resistant and anti-fouling mechanism. At the same time, the lower surface of the main wire (1) is bonded to the adhesive layer (11), and the main wire (1) is bonded to the release layer (12) through the adhesive layer (11), and the release layer (12) is connected to the wear-resistant coating (18) through the wear-resistant protection mechanism.

2. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 1, characterized in that: The main wire (1) and the inner wire (2) form an embedded structure, and the main wire (1) forms an adhesive structure with the first release layer (4) through the first adhesive layer (3). The outer surface of the first release layer (4) is provided with a release hole (5), and the antibacterial and bacteriostatic material is released through the release hole (5).

3. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 1, characterized in that: The wear-resistant and anti-fouling mechanism also includes an adhesive layer two (6) bonded to the upper surface of the release layer one (4), and wear-resistant yarn one (7) bonded to the upper surface of the adhesive layer two (6), and wear-resistant yarn two (8) woven to the outer surface of the wear-resistant yarn one (7), while an adhesive layer three (9) bonded to the outer surface of the wear-resistant yarn two (8), and an anti-fouling coating (10) bonded to the upper surface of the adhesive layer three (9).

4. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 3, characterized in that: The release layer 1 (4) is bonded to wear-resistant wire 1 (7) and wear-resistant wire 2 (8) through adhesive layer 2 (6), and wear-resistant wire 1 (7) and wear-resistant wire 2 (8) are bonded to anti-fouling coating (10) through adhesive layer 3 (9), and the holes in the anti-fouling coating (10) are the same size as the release hole 1 (5) in the release layer 1 (4).

5. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 1, characterized in that: The main wire (1) is bonded to the release layer (2) through the adhesive layer (11), and the release layer (2) has a release hole (13) on its inner surface, and the inner diameter of the release hole (2) (13) is smaller than the inner diameter of the release hole (5).

6. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 1, characterized in that: The wear-resistant protective mechanism also includes an adhesive layer five (14) bonded to the lower surface of the release layer two (12), and the outer surface of the adhesive layer five (14) is woven with reinforcing yarn one (15) and reinforcing yarn two (16), and the lower surfaces of reinforcing yarn one (15) and reinforcing yarn two (16) are compositely connected with a wear-resistant coating (18), while the main yarn (1) is bonded with a slow-release particle one (17) in the gap.

7. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 6, characterized in that: The second release layer (12) is reinforced by the fifth adhesive layer (14), the first reinforcing thread (15) and the second reinforcing thread (16), and the first reinforcing thread (15) and the second reinforcing thread (16) are bonded to the wear-resistant coating (18) to form a wear-resistant structure. The pore size of the wear-resistant coating (18) is consistent with the pore size of the second release hole (13). At the same time, the main thread (1) and the first slow-release particle (17) are used for permeation. The first slow-release particle (17) retains the Artemisia argyi extract through microcapsule technology.

8. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 1, characterized in that: The inner surface of the inner filament (2) also includes an outer membrane (19), and the inner surface of the outer membrane (19) is provided with irregular holes (20), and the inner surface of the outer membrane (19) is attached to a first filament (21), and the inner surface of the first filament (21) is connected to a second filament (22). Meanwhile, the outer surface of the second filament (22) is permeated with a second slow-release particle (23), and the outer surface of the second filament (22) is permeated with a dyeing material (24). Meanwhile, the inner surface of the second filament (22) is attached to a third filament (25), and the second slow-release particle (23) retains the Artemisia argyi extract through microencapsulation technology.

9. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 8, characterized in that: The inner silk thread (2) forms a release structure through the outer membrane (19) and irregular holes (20), and the outer membrane (19) and the first silk thread (21) form a wrapping structure to improve the release of Artemisia argyi extract when the inner silk thread (2) is used.

10. The antibacterial and bacteriostatic bag fabric integrating Artemisia argyi extract mixture according to claim 8, characterized in that: The first filament (21) forms a sandwich structure with the second filament (22) and the second slow-release particle (23), and the second filament (22) forms an impregnation structure with the third filament (25) through the impregnation material (24).

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