Antibacterial fabric for underwear

Abstract

This invention provides an antibacterial fabric for underwear, composed of an outer layer, a middle layer, and an inner layer. The outer layer has a mesh structure, the middle layer has a plain knit structure, and the inner layer has a mesh structure. The outer and middle layers are made of bamboo fiber yarn, while the inner layer is a blend of polyimide and bamboo fiber yarns. The inner layer has a larger pore size than the outer layer, and the outer layer has a larger pore size than the middle layer. By using polyimide and bamboo fiber yarns as the raw materials, the antibacterial properties of both can be fully utilized, avoiding the need for antibacterial treatment agents. This ensures stable antibacterial properties that do not weaken during use, and allows the fabric to maintain comfort while also providing antibacterial and breathability. Through this method, an antibacterial fabric for underwear with excellent antibacterial properties, good breathability, and stable antibacterial performance is provided.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, and in particular to an antibacterial fabric for underwear. Background Technology

[0002] Antibacterial fabrics for underwear are a special type of functional fabric. They are treated with antibacterial agents or contain antibacterial fibers, which can inhibit the growth and reproduction of bacteria and fungi on the fabric or render them inactive. Qualified antibacterial fabrics for underwear should ensure that they have no side effects on human health and do not affect the normal flora of human skin while providing antibacterial protection.

[0003] Both polyimide fiber and bamboo fiber possess certain antibacterial properties. To utilize these properties, they can be directly blended to obtain an antibacterial fabric. In the prior art, Chinese patent application number 201710440029.5, published on September 22, 2017, entitled "A Polyimide Fiber and Bamboo Fiber Blended Yarn and its Processing Method, System and Application," describes a method where polyimide fiber and bamboo fiber are opened and carded separately using a carding and loosening process, followed by pretreatment to obtain polyimide slivers and bamboo slivers. The polyimide slivers and bamboo slivers are then mixed and processed into roving and spinning yarns to obtain a polyimide fiber and bamboo fiber blended yarn. While this method blends polyimide fiber and bamboo fiber to ensure a relatively consistent composition of the fabric in contact with the human body, the dispersed nature of the polyimide fiber in the fabric hinders its ability to exert its excellent antibacterial properties.

[0004] In the prior art, Chinese patent application number 201410607088.3, ​​published on June 1, 2016, entitled "An Antibacterial Underwear Fabric and Its Preparation Method," describes an invention patent that first blends ultrafine polyester fibers, bamboo fibers, milk fibers, and spandex fibers, and then coats the original fibers with a natural antibacterial agent to inhibit bacterial growth at the source. However, because the polyurethane coating contains certain toxins, it can harm the skin upon contact and may cause allergic reactions. Furthermore, the coating may peel off after repeated washing, affecting the fabric's antibacterial properties.

[0005] In the prior art, Chinese patent application number 202023022039.3, published on September 28, 2021, entitled "A Fiber Blend High Moisture-wicking Composite Fabric," discloses a fiber blend high moisture-wicking composite fabric. This composite fabric is obtained by layering an inner layer, a middle layer, and an outer layer from the inside out. The inner layer is a knitted fabric, specifically a pique mesh fabric, woven from polypropylene yarn spun from fine denier polypropylene fibers. The middle layer is a spunlace nonwoven fabric spun from moisture-absorbing fibers. The outer layer is a woven fabric, woven from linen yarn in a plain weave structure. While the composite fabric produced by the above technical solution has good breathability, heat dissipation, and perspiration wicking properties, when used as clothing, it creates a warm and humid environment on the skin's surface when the body sweats, creating an environment conducive to the rapid growth of bacteria.

[0006] In view of this, it is necessary to design an improved antibacterial fabric for underwear to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide an antibacterial fabric for underwear with excellent antibacterial and breathable properties.

[0008] To achieve the above-mentioned objectives, this invention provides an antibacterial fabric for underwear, comprising an outer layer fabric, a middle layer fabric, and an inner layer fabric; the outer layer fabric has a mesh size of R1, the middle layer fabric has a mesh size of R2, and the inner layer fabric has a mesh size of R3, wherein R2... <R1<R3。

[0009] Preferably, the range of R1 is 1800×800μm~1400×400μm, the range of R2 is 450×280μm~350×180μm, and the range of R3 is 2500×600μm~2200×300μm.

[0010] Preferably, the inner fabric is woven from a mixture of polyimide fiber yarn and bamboo fiber yarn.

[0011] Preferably, the mass ratio of the polyimide fiber yarn to the bamboo fiber yarn is (99:1) to (67:33).

[0012] Preferably, the outer fabric is woven from bamboo fiber yarn.

[0013] Preferably, the middle layer fabric is woven from bamboo fiber yarn.

[0014] Preferably, the outer fabric has a mesh structure.

[0015] Preferably, the middle layer fabric has a plain knit structure.

[0016] Preferably, the inner fabric has a mesh structure.

[0017] Preferably, the outer fabric, the middle fabric, and the inner fabric are woven together as one piece.

[0018] The beneficial effects of this invention are:

[0019] 1. The antibacterial fabric for underwear proposed in this invention is produced by setting the fabric into a three-layer structure with a certain pore size, using bamboo fiber yarn to prepare the outer and middle layers, and using both polyimide fiber yarn and bamboo fiber yarn as the inner layer raw materials, thus obtaining an antibacterial fabric with excellent breathability and antibacterial properties. Through this method, the antibacterial properties of the polyimide fiber yarn and bamboo fiber yarn are utilized to provide an environment that inhibits the growth of bacteria and fungi, giving the antibacterial fabric excellent antibacterial properties.

[0020] 2. The antibacterial fabric for underwear proposed in this invention features a structure where the inner layer pore size is larger than the outer layer pore size, and the outer layer pore size is larger than the middle layer pore size. Gas is accelerated within this structure, facilitating gas passage and resulting in excellent breathability. This allows for rapid dissipation of body heat, keeping the fabric dry during use. It inhibits the growth of bacteria and fungi through a microenvironmental barrier. This environmental antibacterial effect, combined with the inherent antibacterial properties of polyimide and bamboo fiber yarns, achieves synergistic inhibition of bacteria through both the growth environment and the molecular antibacterial properties of the materials. Under these dual conditions, without a favorable growth environment, bacterial activity decreases. Furthermore, it is further enhanced by… Material molecular inhibition achieves a more efficient antibacterial effect. Furthermore, using bamboo fiber yarn as the raw material for both the outer and middle layers of the fabric fully utilizes the excellent antibacterial and bacteriostatic properties, moisture absorption and breathability, and soft hand feel of the bamboo fiber yarn itself. This allows the fabric to maintain comfort while ensuring both antibacterial properties and breathability. Simultaneously, using a certain composition of polyimide fiber yarn and bamboo fiber yarn to form the inner layer of the fabric fully utilizes the inherent antibacterial properties of both the polyimide and bamboo fiber yarns, giving the fabric excellent antibacterial properties. This avoids the need for antibacterial treatment agents, ensuring stable antibacterial properties that do not weaken during use. Through these methods, an antibacterial fabric for underwear with excellent antibacterial properties, good breathability, and stable antibacterial performance is provided. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the antibacterial fabric proposed in this invention;

[0022] Figure 2 A 3D microscope image of the front of the antibacterial fabric prepared in Example 1 of the present invention;

[0023] Figure 33D microscope image of the reverse side of the antibacterial fabric prepared in Example 1 of the present invention;

[0024] Figure 4 Antibacterial test result of the antibacterial fabric prepared in Example 5 of the present invention against Candida albicans;

[0025] Figure 5 is Figure 4 Antibacterial test result of the antibacterial fabric in [] against Candida albicans after 100 washes. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Here, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0028] In addition, it should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0029] Please refer to Figure 1 As shown, the antibacterial fabric for underwear provided by the present invention is composed of an outer fabric, a middle fabric and an inner fabric. The outer fabric is a mesh structure with a mesh aperture of R1. The middle fabric is a plain stitch structure with a straight through-hole aperture of R2. The inner fabric is a mesh structure with a mesh aperture of R3, and R2 < R1 < R3 is satisfied. The antibacterial fabric for underwear with the above structure has excellent air permeability and antibacterial property.

[0030] Among them, the raw materials of the outer fabric and the middle fabric are both antibacterial Tianzhu fiber yarns. The raw material of the inner fabric is a mixture of polyimide fiber yarns and Tianzhu fiber yarns, and the mass ratio of polyimide fiber yarns to Tianzhu fiber yarns is (99:1) to (67:33). When the addition amounts of polyimide fiber yarns and Tianzhu fiber yarns in the inner fabric meet the above conditions, the inner fabric can maintain excellent antibacterial property and soft hand feeling.

[0031] Further, the range of R1 is 1800×800μm to 1400×400μm, the range of R2 is 450×280μm to 350×180μm, and the range of R3 is 2500×600μm to 2200×300μm. The reason for making each layer of the fabric satisfy R2 < R1 < R3 is as follows:

[0032] For a fabric with a structure satisfying the above conditions, a "de Laval nozzle" effect can occur within the fabric. The "de Laval nozzle" consists of a convergent duct and a divergent duct. Under the action of the pressure difference between the inside and outside of the fabric, the gas first enters the convergent duct. Since the cross-section gradually decreases at this point, the gas is continuously accelerated here. When reaching the end of the convergent duct, the gas velocity reaches the maximum. Subsequently, the gas enters the divergent duct, where the cross-section gradually increases. The velocity change law of the gas passing through the divergent duct is opposite to that of the convergent duct section, and the gas is accelerated again. In this way, a thrust force on the gas is generated inside the fabric, endowing the fabric with excellent antibacterial properties.

[0033] The following further illustrates the present invention in conjunction with specific embodiments:

[0034] Example 1

[0035] In this example, an antibacterial fabric for underwear was prepared. The above-mentioned antibacterial fabric for underwear is composed of a composite of an outer fabric, a middle fabric, and an inner fabric. The outer fabric is a mesh structure woven from Tianzhu fiber yarns, and the mesh aperture R1 is 1800×800μm. The middle fabric is a plain stitch structure woven from Tianzhu fiber yarns, and the aperture R2 of the plain stitch structure is 450×280μm. The inner fabric is a mesh structure woven from a mixed fiber of polyimide fiber yarns and Tianzhu fiber yarns, and the mesh aperture R3 is 2500×600μm. Among them, the mass ratio of polyimide fiber yarns to Tianzhu fiber yarns is 99:1. The 3D microscope images of the antibacterial fabric for underwear prepared in this example are as shown in Figure 2 and Figure 3 As shown, it can be seen from the figure that the mesh aperture R1 on the front side of the fabric is 1797.82μm×720.33μm, and the mesh aperture R3 on the back side of the fabric is 2429.11μm×520.00μm. There is only a small error between the test results and the designed aperture size.

[0036] Examples 2 to 5

[0037] The only difference between Examples 2 to 5 and Example 1 is the mass ratio of polyimide fiber yarn to bamboo fiber yarn in the inner layer fabric. The other steps are basically the same as in Example 1 and will not be repeated here. Table 1 shows the comparison of the mass ratio of polyimide fiber yarn to bamboo fiber yarn and the properties of the fabrics obtained in Examples 1 to 5. As can be seen from the table, when the fabric satisfies the mass ratio of polyimide fiber yarn to bamboo fiber yarn in the inner layer fabric being (99:1) to (67:33), and the pore sizes of each layer structure satisfy the following conditions: R1 is in the range of 1800×800μm to 1400×400μm, R2 is in the range of 450×280μm to 350×180μm, and R3 is in the range of 2500×600μm to 2200×300μm, the resulting fabric can simultaneously possess excellent breathability and antibacterial rate.

[0038] Table 1. Mass ratio of polyimide fiber yarn and bamboo fiber yarn in Examples 1 to 5 and the properties of the resulting fabrics.

[0039]

[0040] Example 5 was submitted to the China Textile Standard (CTS). According to GB / T 20944.3-2008 "Evaluation of Antimicrobial Properties of Textiles - Part 3: Shaking Method", the antimicrobial rate against Candida albicans was tested to be 90%, indicating an antimicrobial effect. The test results are as follows: Figure 4 As shown; and after 100 washes, the antibacterial rate against Candida albicans remained at 90%, indicating that the fabric prepared using the method of this invention has stable breathability, thereby achieving excellent antibacterial properties in the fabric through the synergistic effect of the fiber's own properties. The antibacterial test results are as follows. Figure 5 As shown.

[0041] The formation mechanism of the antibacterial fabric for underwear of the present invention will be explained below:

[0042] This invention utilizes both polyimide fiber yarn and bamboo fiber yarn as components of antibacterial fabric for underwear. This fully leverages the antibacterial properties of both fibers. The antibacterial properties of polyimide fiber yarn are primarily due to its internal polar carbonyl structure. Carbonyl compounds are generally absent in living organisms, and microorganisms lack the corresponding metabolic enzyme systems, thus inhibiting bacterial growth and reproduction on the fiber surface. Furthermore, the nitrogen atoms in the macromolecular chains of polyimide fiber yarn possess lone electrons. When the fabric comes into contact with water molecules, these lone electrons can combine with hydrogen atoms in the water to form positively charged quaternary ammonium salt groups, which then adsorb negatively charged bacteria and fungi, disrupting cell enzymes and cell walls, and hindering bacterial growth and reproduction. The antibacterial properties of bamboo fiber are due to its internal "bamboo quinone," which can damage the cell walls of bacteria, weakening their survival ability. The bamboo fiber yarn utilizes an optimized bamboo fiber dissolution process to maximize the protection of the "bamboo quinone" component within the bamboo fiber. By using bamboo fiber yarn as the outer layer of antibacterial fabric for underwear, the moisture-wicking properties of bamboo fiber yarn can be utilized to give the fabric overall wearing comfort, making it more suitable for application; by setting the layer structure of the fabric to meet a certain pore size, the breathability of the fabric can be enhanced by utilizing the characteristics of the pore size.

[0043] In summary, the antibacterial fabric for underwear proposed in this invention, by setting the fabric into a three-layer structure with a certain pore size, using bamboo fiber yarn for the outer and middle layers, and using both polyimide fiber yarn and bamboo fiber yarn as the inner layer raw materials, can produce an antibacterial fabric with excellent breathability and antibacterial properties. Through this method, the inherent antibacterial properties of the polyimide fiber yarn and bamboo fiber yarn can be utilized to provide an environment that inhibits the growth of bacteria and fungi, thus endowing the antibacterial fabric with excellent antibacterial properties. This method provides an antibacterial fabric for underwear with excellent antibacterial properties, good breathability, and stable antibacterial performance.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An antibacterial fabric for underwear, characterized in that, It is composed of an outer layer fabric, a middle layer fabric, and an inner layer fabric; the mesh size of the outer layer fabric is R1, the mesh size of the middle layer fabric is R2, and the mesh size of the inner layer fabric is R3, and R2... <R1<R3; The range of R1 is 1800×800μm ~1400×400μm, the range of R2 is 450×280μm ~350×180μm, and the range of R3 is 2500×600μm ~2200×300μm; The inner layer fabric is woven from a mixture of polyimide fiber yarn and bamboo fiber yarn. The mass ratio of the polyimide fiber yarn to the bamboo fiber yarn is (99:1) to (67:33). The outer fabric is a mesh structure woven from bamboo fiber yarn; The middle layer fabric is a plain knit structure woven from bamboo fiber yarn; The inner fabric has a mesh structure.

2. The antibacterial fabric for underwear according to claim 1, characterized in that, The outer fabric, the middle fabric, and the inner fabric are woven together to form a single unit.

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