Load transfer and transition bacteriostatic pure cotton non-woven fabric and manufacturing method thereof

Abstract

The invention relates to the technical field of cotton fabric manufacturing, in particular to a charge transfer and transition bacteriostatic pure cotton non-woven fabric and a manufacturing method thereof.The manufacturing method includes the steps that raw cotton is degreased, opened and carded, base cloth is manufactured through a spunlace method, and the pretreated pure cotton non-woven fabric is obtained after drying and impurity removing; the preparation method comprises the following steps: soaking cotton fibers into a charge transfer transition reagent containing alizarin and waterborne polyurethane, accurately loading through a four-roller unit, and curing through 254nm-365nm ultraviolet light, so that the reagent and the cotton fibers form covalent bonds to realize charge transfer transition. An ultrathin polymer film layer is formed on the cloth cover of the product, million-level electron-hole pairs are contained, the initial bacteriostasis rate exceeds 99%, and a good bacteriostasis effect is still kept after the product is washed with water for 150 times. The antibacterial non-woven fabric adopts a natural antibacterial agent, is free of skin irritation and toxic residues, is environment-friendly in production process, has skin friendliness and mechanical strength, is suitable for medical and hygienic products such as surgical gown and medical dressing, and solves the problems of poor washability, potential safety hazards and the like of the traditional antibacterial non-woven fabric.

Description

Technical Field

[0001] This invention relates to the field of cotton textile manufacturing technology, and in particular to a charge-transfer antibacterial pure cotton nonwoven fabric and its manufacturing method. Background Technology

[0002] In the medical and hygiene fields, pure cotton nonwoven fabrics are widely used in surgical gowns, medical dressings, high-grade bandages, and other medical devices and hygiene products due to their skin-friendly and breathable properties. To meet the antibacterial requirements of various usage scenarios, existing technologies often employ the addition of antibacterial agents or composite antibacterial layers to achieve antibacterial functions. Common antibacterial solutions include the use of quaternary ammonium salt antibacterial agents, silver ion antibacterial agents, plant extract antibacterial agents, or composite bamboo charcoal fiber layers.

[0003] However, existing manufacturing technologies for antibacterial pure cotton nonwoven fabrics still have many shortcomings: some products rely on the physical adhesion of antibacterial agents to achieve their antibacterial effect. These agents are not firmly bonded to the fibers and easily detach after use or washing, leading to a rapid decline in antibacterial efficacy. Typically, after several washes, they fail to meet effective antibacterial standards, making repeated use difficult. Quaternary ammonium salt antibacterial agents, while having a faster antibacterial speed, may lead to bacterial resistance with long-term use and have poor wash resistance. Silver ion antibacterial agents, while broad-spectrum, have potential toxicity at high concentrations and are costly to manufacture. Traditional plant extract antibacterial agents generally suffer from weak antibacterial effects and poor wash resistance, failing to achieve long-lasting antibacterial effects. Bamboo charcoal fiber composite nonwoven fabrics not only have a significant environmental pollution during manufacturing, but their material properties are also unsuitable for products like surgical gowns and sanitary napkins, which require high skin-friendliness and safety. Furthermore, some antibacterial agents pose a risk of skin irritation, affecting product safety and making it difficult to simultaneously meet the comprehensive needs of long-lasting antibacterial effects, wash resistance, and biosafety.

[0004] In response to the technical problems of existing antibacterial pure cotton nonwoven fabrics, such as easy decay of antibacterial effect, insufficient washability, and safety hazards or environmental unfriendliness of some antibacterial agents, there is an urgent need to develop a new antibacterial pure cotton nonwoven fabric manufacturing technology. Through innovative antibacterial mechanisms and material combinations, a long-lasting and stable antibacterial effect can be achieved, while ensuring the product's washability, skin-friendliness, and safety, so as to meet the needs of the medical and hygiene fields for high-quality antibacterial nonwoven fabrics. Summary of the Invention

[0005] To address the technical problems of existing antibacterial pure cotton nonwoven fabrics having easily diminished antibacterial effects, insufficient washability, and safety hazards or environmental unfriendliness of some antibacterial agents, this invention provides a method for manufacturing a charge-transfer antibacterial pure cotton nonwoven fabric, comprising the following steps; S110. The raw cotton is degreased, then opened and combed to form a fiber web, which is made into a base fabric. It is then dried and dewatered and impurity removed in sequence to remove surface lint and discolored substances, thus obtaining a pretreated pure cotton nonwoven fabric. S120. The pretreated pure cotton nonwoven fabric is fed into the impregnation unit and impregnated with the transfer reagent for 10s~30s to perform functional loading. S130. The pure cotton nonwoven fabric loaded with reagent is sent into the ultraviolet curing equipment and irradiated under 254nm~365nm ultraviolet light for (10±0.5) min to cure and shape, so as to realize the charge transfer transition. The charge transfer reagent is composed of anthraquinone antibacterial agent, deionized water and adhesive, and the amount used is 80% to 85% of the weight of pure cotton nonwoven fabric; the ambient temperature is 20℃ to 25℃, the ambient humidity is 45% to 60%, and the cleanliness level needs to reach Class 100,000.

[0006] In some embodiments, the charge-transfer reagent is prepared by the following steps: anthraquinone antibacterial agent is mixed with deionized water, then a binder is added and stirred until uniform and transparent, and allowed to stand for more than 5 minutes to obtain the charge-transfer reagent.

[0007] In some embodiments, the anthraquinone antibacterial agent is alizarin; the adhesive is waterborne polyurethane.

[0008] In some embodiments, the concentration of anthraquinone antibacterial agent in the charge transfer reagent is 13% to 25%, and the concentration of waterborne polyurethane is 0.008% to 0.2%.

[0009] In some embodiments, in step S110, the raw cotton is treated with pure oxygen bleaching in a "one-bath method" to obtain degreased cotton, the base fabric is made by hydroentangling, and the cotton is dried and dehydrated by heat radiation in a drying cylinder.

[0010] In some embodiments, in step S120, the impregnation unit is a 4-roll impregnation unit; wherein the pressure of the first pressure roll is (2±0.1) kg, the pressure of the second pressure roll is (1.5±0.1) kg, the pressure of the third pressure roll is (1.5±0.1) kg, and the pressure of the fourth pressure roll is (1.0±0.01) kg.

[0011] Furthermore, a pipeline sprayer is provided in front of the fourth pressure roller to spray a charge transfer reagent onto the pure cotton nonwoven fabric.

[0012] The present invention also provides a charge-transition antibacterial pure cotton nonwoven fabric, which is prepared according to the manufacturing method of charge-transition antibacterial pure cotton nonwoven fabric as described above, and the fabric surface has an antibacterial polymer film layer with a thickness of ≤50μm; the antibacterial film layer has millions of electron-hole pairs.

[0013] In some embodiments, the thickness of the polymer film is 5 μm to 20 μm.

[0014] In some embodiments, the charge-transfer antibacterial pure cotton nonwoven fabric has a basis weight of 40 g / m².2 ~120g / m 2 The ratio of longitudinal to transverse strength is MD:CD = 1:(1.2~1.3).

[0015] In summary, compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a charge-transfer reaction to create a positive and negative polarity balance in the molecular clusters of pure cotton nonwoven fabric. Combined with ultraviolet curing, it achieves covalent bonding between alizarin extracted from natural plants and cotton fibers. Precise loading via a 4-roll impregnation unit and sprayer ensures uniform and firm adhesion of the reagent, maintaining a strong and long-lasting antibacterial effect even after washing, far exceeding traditional physically adhesive products. Low-concentration waterborne polyurethane is used as the adhesive, ensuring no skin irritation or toxic residue during use, avoiding the safety hazards of traditional antibacterial agents and meeting the needs of skin-friendly medical and hygiene products. Production employs a pure oxygen bleaching process and deionized water for reagent preparation, ensuring that exhaust gases are treated and emitted without environmental pollution. Strict control of the production environment's temperature, humidity, and cleanliness guarantees consistent product performance. The product's weight and longitudinal and transverse strength are rationally proportioned, balancing skin-friendliness and mechanical strength, making it suitable for various application scenarios. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0017] The charge-transfer antibacterial pure cotton nonwoven fabric provided by this invention is prepared according to the following steps: S110. The raw cotton is treated with pure oxygen bleaching in a "one-bath" process to obtain degreased cotton. The degreased cotton is then opened and combed to form a fiber web. The base fabric is made by hydroentangling. The base fabric is dried by heat radiation in a drying drum to remove water. Then, the impurity is removed to remove surface lint and discolored substances, resulting in pretreated pure cotton nonwoven fabric. S120. The pretreated pure cotton nonwoven fabric is fed into the impregnation unit at a speed of 40m / min~60m / min, and passes through 4 pressure rollers. The impregnation is carried out with a transfer agent for 10s~30s to achieve functional loading. The pressure of the first pressure roller is (2±0.1)kg, the pressure of the second pressure roller is (1.5±0.1)kg, the pressure of the third pressure roller is (1.5±0.1)kg, and the pressure of the fourth pressure roller is (1.0±0.01)kg. A pipeline sprayer is provided before the fourth pressure roller to spray the transfer agent onto the pure cotton nonwoven fabric. S130. The pure cotton nonwoven fabric loaded with reagent is fed into the ultraviolet curing equipment at a speed of 40m / min~60m / min, impregnated with ultraviolet curing agent, and irradiated under 254nm~365nm ultraviolet light for (10±0.5)min to cure and shape, so as to realize the charge transfer transition. S140. The cured pure cotton nonwoven fabric is fed into a slitting machine for slitting, and after passing quality inspection, the load-transfer antibacterial pure cotton nonwoven fabric is obtained.

[0018] The charge-transfer reagent is composed of anthraquinone antibacterial agent, deionized water, and adhesive, with the concentration of the anthraquinone antibacterial agent being 13%~25%, the concentration of the waterborne polyurethane being 0.008%~0.2%, and the amount of charge-transfer reagent being 80%~85% of the weight of the pure cotton nonwoven fabric; the ultraviolet curing agent is dimethyl propylene phosphate (DA) or poly(L-lysine) modified polyurethane acrylate (PLL-modified PUA); the ambient temperature is 20℃~25℃, the ambient humidity is 45%~60%, and the cleanliness level needs to reach Class 100,000.

[0019] Example 1 This embodiment provides a charge-transfer antibacterial pure cotton nonwoven fabric with a thickness of 0.3 cm and a basis weight of 60 g / m². 2 The ratio of longitudinal to transverse strength (MD:CD) is 1:1.3, and the whiteness is 89. The fabric surface has an antibacterial film layer with a thickness ≤40μm and an antibacterial rate of 99%. Even after 20 washes, the antibacterial rate remains ≥90%. It is non-irritating to the skin and can be used in the production of medical dressings. It is prepared by the following steps: S110. The raw cotton is treated with pure oxygen bleaching in a "one-bath" process to obtain degreased cotton with a whiteness of 92. The degreased cotton is then opened and combed to form a fiber web, which is sent to a semi-cross-spunlace nonwoven fabric production line to make a base fabric. It is then dried in a drying cylinder at 120°C for 3 minutes, and then surface impurities and discolored substances are removed by a laser impurity removal machine to obtain a pretreated pure cotton nonwoven fabric. S120. The pretreated pure cotton nonwoven fabric is fed into the impregnation unit at a speed of 50m / min. It passes through 4 pressure rollers and is impregnated with a load transfer agent for 20s to perform functional loading. The pressure of the first pressure roller is (2±0.1)kg, the pressure of the second pressure roller is (1.5±0.1)kg, the pressure of the third pressure roller is (1.5±0.1)kg, and the pressure of the fourth pressure roller is (1.0±0.01)kg. Two pipe sprayers with a width of 3.8m are installed in front of the fourth pressure roller to spray the load transfer agent on both sides of the pure cotton nonwoven fabric. S130. The pure cotton nonwoven fabric loaded with reagent is fed into the ultraviolet curing equipment at a speed of 50m / min, impregnated with DA curing agent, and irradiated under 300nm ultraviolet light for (10±0.5)min to cure and shape, so that alizarin and cotton fiber are covalently bonded to achieve charge transfer transition. S140. The cured pure cotton nonwoven fabric is fed into a slitting machine and cut into sheets of 20cm×30cm. Samples are then sent to a Class 10,000 cleanroom for testing the antibacterial rate and fiber mechanical properties. If the test is qualified, the load-transfer antibacterial pure cotton nonwoven fabric is obtained.

[0020] The charge-transfer reagent is prepared according to the following steps: 25 kg of alizarin is mixed with 100 kg of deionized water, and then 0.2 kg of aqueous polyurethane is added. The pH of the system is controlled at 5.5~6.8. The mixture is stirred until it is uniform and transparent, and then allowed to stand for more than 5 minutes to obtain the charge-transfer reagent. The amount of the charge-transfer reagent is calculated as 82% of the weight of pure cotton nonwoven fabric.

[0021] In this embodiment, preferably, the raw cotton is Grade 2 raw cotton that conforms to GB 1103.1-2023 Cotton Part 1: Saw-Ginned Fluffy Cotton; deionized water with a conductivity ≤10μS / cm is used in both step S110 and the preparation of the charge transfer reagent. In step S130, the ultraviolet light source is a 500W cold light source UV LED lamp with a lamp spacing of 10cm, and the equipment temperature is controlled to be ≤30℃ during the curing process by a cooling system that wraps the lamp body with a circulating water jacket.

[0022] Example 2 This embodiment provides a charge-transfer antibacterial pure cotton nonwoven fabric, which differs from Embodiment 1 of the present invention in that: the charge-transfer antibacterial pure cotton nonwoven fabric has a thickness of 0.2 cm and a basis weight of 40 g / m². 2 The ratio of longitudinal to transverse strength (MD:CD) is 1:1.3, the whiteness is 87, and the fabric surface has an antibacterial film layer with a thickness ≤35μm, an antibacterial rate of 99%, and the antibacterial rate is still ≥90% after 20 washes; in step S110, the whiteness of the degreased cotton is 89. The remaining raw materials, reagents, manufacturing methods, and process parameters are consistent with those in Example 1 of this invention.

[0023] Example 3 This embodiment provides a charge-transfer antibacterial pure cotton nonwoven fabric, which differs from Embodiment 1 of the present invention in that: the charge-transfer antibacterial pure cotton nonwoven fabric has a thickness of 0.5 cm and a basis weight of 90 g / m². 2 The ratio of longitudinal to transverse strength (MD:CD) is 1:1.3, the whiteness is 91, and the fabric surface has an antibacterial film layer with a thickness ≤35μm, an antibacterial rate of 99%, and the antibacterial rate is still ≥90% after 20 washes; in step S110, the whiteness of the degreased cotton is 95. The remaining raw materials, reagents, manufacturing methods, and process parameters are consistent with those in Example 1 of this invention.

[0024] Example 4 This embodiment provides a charge-transfer antibacterial pure cotton nonwoven fabric, which differs from Embodiment 1 of the present invention in that: in step S130, the ultraviolet curing agent is PLL-modified PUA. All other raw materials, reagents, manufacturing methods, and process parameters are the same as in Embodiment 1 of the present invention.

[0025] Comparative Example 1 This comparative example provides an antibacterial nonwoven fabric, which differs from Example 1 of the present invention in that it excludes step S110 and directly uses commercially available nonwoven fabric for impregnation, curing, and slitting. All other raw materials, reagents, manufacturing methods, and process parameters are the same as in Example 1 of the present invention.

[0026] Comparative Example 2 This comparative example provides an antibacterial nonwoven fabric, which differs from Example 1 of the present invention in that: in step S120, the charge-transfer reagent is replaced with a quaternary ammonium salt antibacterial agent. All other raw materials, reagents, manufacturing methods, and process parameters are the same as in Example 1 of the present invention.

[0027] Comparative Example 3 This comparative example provides an antibacterial nonwoven fabric, which differs from Example 1 of the present invention in that: in step S120, the charge-transfer reagent is replaced with an anionic antibacterial agent. All other raw materials, reagents, manufacturing methods, and process parameters are the same as in Example 1 of the present invention.

[0028] Comparative Example 4 This comparative example provides an antibacterial nonwoven fabric, which differs from Example 1 of the present invention in that: in step S120, the charge transfer reagent is replaced with an antibacterial agent prepared by mixing chlorophyll with deionized water and aqueous polyurethane. All other raw materials, reagents, manufacturing methods, and process parameters are the same as in Example 1 of the present invention.

[0029] Comparative Example 5 This comparative example provides an antibacterial nonwoven fabric, which differs from Embodiment 1 of the present invention in that: in step S120, a sprayer is not installed before the fourth pressure roller to spray the transfer reagent. All other raw materials, reagents, manufacturing methods, and process parameters are the same as in Embodiment 1 of the present invention.

[0030] The antibacterial pure cotton nonwoven fabric prepared in the above embodiments was subjected to textile appearance inspection according to "FZ / T 64012-2013 Hygienic Hydroentangling Nonwoven Fabrics", and the inspection results are summarized in Table 1.

[0031] Table 1. Appearance Inspection Results of Charge-Transfer Antibacterial Pure Cotton Nonwoven Fabric

[0032] The antibacterial nonwoven fabrics prepared in the above embodiments and comparative examples were tested for antibacterial rate according to GB / T 20944.2-2007 Evaluation of antimicrobial properties of textiles - Part 2: Absorption method, with the addition of a fungal antibacterial rate test. After washing 150 times according to GB / T 8629-2017 Household washing and drying procedures for textile testing, the antibacterial rate was tested again. The test results are summarized in Table 2. Gram-negative bacteria were identified using *Escherichia coli* (E. coli). Escherichia coli, E. coli ATCC 11229, Gram-positive bacteria are Staphylococcus aureus ( Staphylococcus aureus, S. aureus ATCC 6538, the fungus is Candida albicans ( Candida albicans, C. albicans ATCC 1023.

[0033] Table 2. Test results of antibacterial rate of antibacterial nonwoven fabric

[0034] According to the data in Table 2, the initial inhibition rates of Escherichia coli and Staphylococcus aureus in Examples 1-4 were all above 99%, indicating that the stable coordination or charge system formed by charge transfer allowed the antibacterial components to firmly bind to the fibers, resulting in strong initial antibacterial efficacy. After 50 washes, repeated friction and rinsing damaged some charge transfer binding sites, and the antibacterial rate slowly decreased. The inhibitory effect on Gram bacteria was still better than that on fungi. After 100 washes, long-term washing led to a weakening of the stability of the charge transfer system, and the antibacterial rate continued to decrease, but it still met the basic standards of most antibacterial fabrics (such as an antibacterial rate of ≥70% against Candida albicans). After 150 washes, a large amount of the charge-bound antibacterial components were lost, and the antibacterial performance approached the critical value.

[0035] The initial antibacterial rates of Comparative Examples 1-5 were mostly 94%-99%, but the antibacterial rate decreased significantly after washing. After 150 washes, the antibacterial rate was only 36%-66%. Among them, Comparative Examples 2-4, which replaced the antibacterial agent, showed the most severe decline, with the antibacterial rate dropping to about 40% after 150 washes. Comparative Example 1 without pretreatment and Comparative Example 5 without an additional sprayer showed slightly slower decline, but were still far worse than the examples.

[0036] Although this article extensively uses terms such as raw cotton, degreased cotton, pure cotton nonwoven fabric, anthraquinone antibacterial agents, alizarin, deionized water, adhesives, waterborne polyurethane, UV curing agents, dimethyl propylene phosphate (DA), poly(L-lysine-modified) polyurethane acrylate (PLL-modified PUA), polymer films, electron-hole pairs, fiber webs, base fabrics, antibacterial films, basis weight, longitudinal and transverse strength ratio (MD:CD), thickness, whiteness, pressure roller pressure, irradiation time, impregnation time, reagent concentration, ambient temperature, ambient humidity, cleanliness, lamp distance, pH value, conductivity, impregnation unit, 4-roll impregnation unit, UV curing equipment, slitting machine, drying cylinder, laser cleaning machine, semi-cross-linked hydroentangling nonwoven fabric production line, and cold light source UV... Terms such as LED light, pipeline sprayer, circulating water jacket, Class 10,000 cleanroom, degreasing, opening, combing, hydroentangling, drying and dehydration, impurity removal, impregnation, functionalized load, UV curing, curing and shaping, load transfer, stirring, settling, spraying, slitting, quality inspection, sampling inspection, pure oxygen bleaching "one-bath method", thermal radiation drying, and covalent bonding are used, but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a charge-transfer antibacterial pure cotton nonwoven fabric, characterized in that, Includes the following steps: S110. The raw cotton is degreased, then opened and combed to form a fiber web, which is made into a base fabric. It is then dried and dewatered and impurity removed in sequence to remove surface lint and discolored substances, thus obtaining a pretreated pure cotton nonwoven fabric. S120. The pretreated pure cotton nonwoven fabric is sent into the impregnation unit and impregnated with the transfer reagent for 10s~30s to perform functional loading. S130. The pure cotton nonwoven fabric loaded with reagent is sent into the ultraviolet curing equipment and irradiated under 254nm~365nm ultraviolet light for (10±0.5) min to cure and shape, so as to realize the charge transfer transition. The charge transfer reagent is composed of anthraquinone antibacterial agent, deionized water and adhesive, and the amount used is 80% to 85% of the weight of pure cotton nonwoven fabric; the ambient temperature is 20℃ to 25℃, the ambient humidity is 45% to 60%, and the cleanliness level needs to reach Class 100,000.

2. The method for manufacturing the charge-transfer antibacterial pure cotton nonwoven fabric according to claim 1, characterized in that, The charge-transfer reagent is prepared by the following steps: anthraquinone antibacterial agent is mixed with deionized water, then a binder is added and stirred until uniform and transparent, and allowed to stand for more than 5 minutes to obtain the charge-transfer reagent.

3. The method for manufacturing the charge-transfer antibacterial pure cotton nonwoven fabric according to claim 1, characterized in that: The anthraquinone antibacterial agent is alizarin; the adhesive is waterborne polyurethane.

4. The method for manufacturing the charge-transfer antibacterial pure cotton nonwoven fabric according to claim 1, characterized in that: In the charge transfer reagent, the concentration of anthraquinone antibacterial agent is 13%~25%, and the concentration of waterborne polyurethane is 0.008%~0.2%.

5. The method for manufacturing the charge-transfer antibacterial pure cotton nonwoven fabric according to claim 1, characterized in that: In step S110, the raw cotton is treated with pure oxygen bleaching in a "one-bath method" to obtain degreased cotton, the base fabric is made by hydroentangling, and the cotton is dried and dehydrated by heat radiation in a drying cylinder.

6. The method for manufacturing the charge-transfer antibacterial pure cotton nonwoven fabric according to claim 1, characterized in that: In step S120, the impregnation unit is a 4-roll impregnation unit; The pressure of the first pressure roller is (2±0.1) kg, the pressure of the second pressure roller is (1.5±0.1) kg, the pressure of the third pressure roller is (1.5±0.1) kg, and the pressure of the fourth pressure roller is (1.0±0.01) kg.

7. The method for manufacturing the charge-transfer antibacterial pure cotton nonwoven fabric according to claim 6, characterized in that: A pipe sprayer is installed in front of the fourth pressure roller to spray a charge transfer reagent onto the pure cotton nonwoven fabric.

8. A charge-transfer antibacterial pure cotton nonwoven fabric, manufactured according to the method for manufacturing the charge-transfer antibacterial pure cotton nonwoven fabric as described in any one of claims 1 to 7, characterized in that: The fabric has a polymer film layer with a thickness of ≤50μm; the antibacterial film layer has millions of electron-hole pairs.

9. The charge-transfer antibacterial pure cotton nonwoven fabric according to claim 8, characterized in that: The thickness of the polymer film is 5μm to 20μm.

10. The charge-transfer antibacterial pure cotton nonwoven fabric according to claim 8, characterized in that: The charge-transfer antibacterial pure cotton nonwoven fabric has a basis weight of 40g / m². 2 ~120g / m 2 The ratio of longitudinal to transverse strength is MD:CD = 1:(1.2~1.3).

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