A zinc alginate tampon with bio-fluorescent pull thread and a method of making the same

Abstract

The application discloses a zinc alginate sanitary tampon with a bio-fluorescent traction line and a preparation method thereof. The sanitary tampon comprises a non-woven cotton sheet wound into a strip, and a bio-fluorescent traction line is arranged in the middle of the non-woven cotton sheet. The non-woven cotton sheet is formed by compounding a zinc alginate fiber net and a cotton fiber net through a light water needling process, and the structure of the non-woven cotton sheet is that two surfaces form cotton light water needling non-woven fabric layers and zinc alginate light water needling non-woven fabric layers, and the two surfaces are slightly entangled and the middle is fluffy. In addition, the bio-fluorescent traction line is arranged in the middle of the non-woven cotton sheet, the bio-fluorescent traction line is impregnated with fluorescein-labeled chitosan, and is used for fluorescent safety prompt. The sanitary tampon provided by the application has the functions of efficient antibiosis, high water absorption, retention prevention and biological safety (non-toxicity), solves the problems that the antibiosis and water absorption of the existing sanitary tampon are difficult to be considered together, the gel is blocked and the use safety is poor, and has a good application prospect and market value.

Description

Technical Field

[0001] This application relates to the field of feminine hygiene products technology, specifically a zinc alginate tampon with a biofluorescent traction thread and its preparation method. Background Technology

[0002] Tampons belong to the hygiene and health industry. This product is already very common worldwide. Due to different consumption concepts, Chinese people were more recent in recognizing, accepting, and using tampons. However, with rising living standards and changing consumption attitudes, it is increasingly accepted by Chinese consumers, and its market share in China is rapidly increasing. There is a need to analyze, research, and manufacture more high-end sanitary materials for tampons to meet people's ever-increasing demands.

[0003] Tampons are a common menstrual care product for women. Traditional products mainly use materials such as cotton lint and wood pulp, focusing on absorption. However, they have problems such as insufficient antibacterial properties, easy to cause infection, and easy to forget to remove after use.

[0004] In existing technologies, some improvements attempt to enhance functionality by adding drugs or antibacterial ingredients. For example, Chinese invention patent application CN1539511A discloses a tampon coated with nano-silver antibacterial powder, which, while possessing antibacterial properties, lacks high absorbency and gel-forming ability, and also lacks safety warning features. Chinese invention patent application CN114587796A uses multi-layered drug fibers (such as fibers loaded with metronidazole or fibers loaded with Ligusticum chuanxiong extract) composited through a hydroentangling process, focusing on drug treatment; however, the material combination is singular and cannot synergistically solve the problems of absorbency, antibacterial properties, and gel blockage.

[0005] These existing technologies have not solved the following problems: how to balance antibacterial properties, high absorbency, and gel control to avoid gel layer blockage affecting absorbency; and how to prevent users from forgetting to remove the tampons, leading to the safety risk of long-term retention.

[0006] Therefore, there is an urgent need in this field for a sanitary tampon that combines high antibacterial properties, high absorbency, gel control, biocompatibility (toxicity control), and safety warnings. Summary of the Invention

[0007] The purpose of this application is to provide a zinc alginate tampon with a biofluorescent traction thread and its preparation method, so as to solve the problems of difficulty in achieving both antibacterial and absorbent properties, easy gel blockage, and insufficient safety in use in the prior art.

[0008] The technical solution of this application is as follows: A zinc alginate tampon with a bio-fluorescent traction thread is provided. The tampon includes a strip formed by winding a non-woven cotton sheet, wherein a bio-fluorescent traction thread is disposed in the middle of the non-woven cotton sheet; the strip is composed of a roll of degreased cotton spunlace non-woven fabric and a roll of zinc alginate spunlace non-woven fabric.

[0009] The nonwoven cotton sheet is formed by combining zinc alginate fiber web and degreased cotton fiber web using a light hydroentanglement process; wherein, the nonwoven cotton sheet includes a degreased cotton light hydroentangled nonwoven fabric layer and a zinc alginate light hydroentangled nonwoven fabric layer, and the two layers are in a fluffy fiber web hydroentangled composite form; the biofluorescent traction thread is impregnated with a biofluorescent agent.

[0010] In some embodiments, the weight ratio of the degreased cotton fiber web to the zinc alginate fiber web is 4:1. The ratio of the zinc alginate fiber web to the degreased cotton fiber web is designed to ensure that the degreased cotton can dominate the adsorption of body fluids in the resulting nonwoven cotton sheet. This allows the zinc alginate to fully provide antibacterial and gel-forming effects while effectively preventing the gel layer from blocking the water absorption channels.

[0011] In some embodiments, the total weight of the nonwoven cotton sheet is 285–315 g / m². 2 .

[0012] In some embodiments, the zinc alginate fiber web has a basis weight of 60 g / m², the degreased cotton fiber web has a basis weight of 240 g / m², and the total basis weight of the nonwoven cotton sheet is 300 g / m². In some embodiments, the hydroentangling pressure of the light hydroentangling process is 34–36 bar. Through specific design of these process parameters, the treatment is insufficient to completely entangle the fabric fibers, but rather results in a nonwoven cotton sheet with a slightly entangled structure on both sides and a loose, fluffy middle. This structure ensures the strength of the cotton sheet while maintaining the fluffy middle section to promote water absorption and gel bursting.

[0013] In some embodiments, the biofluorescent agent is fluorescein-labeled chitosan-FITC; the biofluorescent traction thread fluoresces under visible light to prompt the user to remove the tampon promptly. The biofluorescent agent uses fluorescein-labeled chitosan (Chitosan-FITC) to make the traction thread fluoresce under visible light, prompting the user to remove the tampon promptly and avoiding prolonged infiltration.

[0014] In some embodiments, the biofluorescent traction thread is a double-ply yarn impregnated with a biofluorescent agent; the double-ply yarn is a blend of zinc alginate fiber and degreased cotton fiber, and the yarn count is 8 to 10; wherein the mass mixing ratio of the zinc alginate fiber and the degreased cotton fiber is 1:3.

[0015] In some embodiments, the zinc alginate fiber web is composed of zinc alginate fibers, wherein the zinc ion content in the zinc alginate fibers is from 150 mg / g to 164.4 mg / g. This zinc ion content and its release rate are designed to ensure the antibacterial properties (99.77% kill rate against Bacillus subtilis) and biosafety of the resulting tampons.

[0016] This application also provides a method for preparing the sanitary tampons as described above, which includes the following steps: Preparation of nonwoven cotton sheet: Degreased cotton fiber and zinc alginate fiber are provided, and the degreased cotton fiber and zinc alginate fiber are compounded into nonwoven cotton sheet by a light hydroentanglement process; wherein the hydroentanglement pressure is 34-36 bar, so that the nonwoven cotton sheet forms a structure with slight entanglement on both sides and loose in the middle; Placement of bio-fluorescent traction thread: Place a bio-fluorescent traction thread in the middle of the non-woven cotton sheet; Molding: The non-woven cotton sheet is dried, rolled, squeezed, cut and shaped to obtain sanitary tampons.

[0017] In some embodiments, the process of preparing nonwoven cotton sheets is as follows: The degreased cotton fibers are fed into a carding machine for combing, forming a degreased cotton fiber web. Zinc alginate fibers are fed into a carding machine for combing, forming a zinc alginate fiber web. The degreased cotton fiber web and the zinc alginate fiber web are stacked and then hydroentangled using a light hydroentanglement machine at a hydroentanglement pressure of 34-36 bar to form the nonwoven cotton sheet.

[0018] In some embodiments, the ratio of the number of carding machines for degreased cotton fibers to the number of carding machines for zinc alginate fibers is 1:4.

[0019] In some embodiments, the light hydroentangling process uses 20 carding machines, of which 16 are used to card degreased cotton fibers (each output 15 g / m²), and 4 are used to card zinc alginate fibers (each output 15 g / m²), with a total fiber web weight of 300 g / m².

[0020] Compared with existing technologies, the solution proposed in this application has the following advantages: The tampons provided in this application combine highly effective antibacterial, highly absorbent, and anti-retention functions with biocompatibility (non-toxic), solving the problems of existing tampons that are difficult to balance antibacterial and absorbent properties, gel blockage, and safety during use. They have good application prospects and market value. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments or prior art, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Unless otherwise specified, the positional relationships shown in the accompanying drawings in the following description are based on the direction in which the components are drawn in the figures.

[0022] Figure 1 This is a schematic diagram of the structure of the composite lightweight spunlace nonwoven fabric of this application; Figure 2 This is a schematic diagram of the cross-sectional structure of the sanitary tampons in this application; Figure 3 This is a schematic diagram of the arrangement of the carding machine for the lightweight spunlace nonwoven fabric in this application.

[0023] Attached image labels: 10. Nonwoven cotton sheet; 100. Degreased cotton light spunlace nonwoven layer; 200. Zinc alginate light spunlace nonwoven layer; 20. First disc opener; 30. Carding machine; 40. Second disc opener; 50. Cotton web conveyor curtain; 60. Light spunlace machine; 70. Dryer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments clearer, the technical solutions in the embodiments will be described clearly and completely below. Obviously, the described embodiments are only a portion of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are within the scope of protection.

[0025] To verify the effectiveness of the proposed solution, the following implementation experiments were conducted: Example 1 Raw material selection: The appropriate raw materials need to be selected according to the requirements for degreased cotton fiber, zinc alginate fiber, and fluorescein labeling agent (chitosan-FITC biofluorescent agent): (1) Degreased cotton fiber: must comply with industry standard YY / T0330-2015 "Medical Degreased Cotton".

[0026] (2) Fluorescent label: Chitosan-FITC, a biofluorescent agent, is a hydroxyindole tricarbonine fluorescent dye.

[0027] (3) Zinc alginate fiber: The parameters should meet the basic requirements of zinc alginate fiber used in sanitary tampons in Appendix 1.

[0028] Table 1 biological performance It needs to pass the GB / T16886 series of tests to ensure good biocompatibility and no cytotoxicity. The cytotoxicity test should be ≤ Grade 1, and there should be no sensitization or intradermal reaction. The zinc ion content in zinc alginate fiber should be between 150 mg / g and 164.4 mg / g. Physical properties It should meet the size requirements specified in the relevant standards (specification: 38cm × 1.5dex) and have good gel integrity, generally ≥90% (measured by centrifugation). Chemical properties Heavy metal content needs to be strictly controlled: lead (Pb) ≤ 10 ppm, cadmium (Cd) ≤ 2 ppm, and arsenic (As) ≤ 3 ppm. The zinc ion content of zinc alginate should be controlled between 150 mg / g and 164.4 mg / g to ensure its antibacterial and water-absorbing properties. Appearance quality The fibers should have a uniform color with no significant differences, and the surface should be smooth, clean, and free from defects such as obvious impurities, lumps, or odors. Toxicity control Zinc is an essential trace element for the human body, with a daily requirement of 8-11 mg. However, if more than 50 mg is ingested daily, it can lead to poisoning. Therefore, the zinc alginate fiber selected should have the function of controlling the release rate of zinc ions (e.g., ethanol treatment, reducing fiber porosity, etc.) to reduce the release rate of zinc ions. By controlling the zinc ion content within a certain range, the toxicity can be kept below the limit. in conclusion Zinc alginate fiber can meet the basic requirements after taking the above measures. The zinc ion content in the zinc alginate fiber is selected (controlled) between 150 mg / g and 164.4 mg / g. Through ethanol treatment and reducing fiber porosity, the zinc ion release rate is reduced (≤40 mg per day), meaning the zinc ion release rate is controllable. In this example, the zinc alginate fiber used has a zinc content of 164.4 mg / g, with a daily zinc ion release ≤40 mg.

[0029] It should be noted that the zinc alginate short fibers with the above parameters are supplied by Qingdao Mingyue Biomedical Materials Co., Ltd., with specifications of (3.5cm x 1.5dex). These are commercially available products. Technicians can select zinc alginate fibers with the required characteristics and parameters from the market based on the parameters and characteristics described in the basic requirements for zinc alginate fibers above.

[0030] Specific preparation process: Tampons are made of two layers of carded fiber webs, which are then treated with a light hydroentangling process to form a nonwoven cotton sheet 10, and finally extruded using a mold; the specific process is as follows: Step 1: Prepare 10 non-woven cotton sheets. (1) Preparation of fiber web like Figure 3 As shown, degreased cotton fibers and zinc alginate fibers are fed into the first disc opener 20 and the second disc opener 40. The light hydroentangling machine 60 has two opening and carding pipes: one conveys the degreased cotton fibers to 16 opposing degreased cotton fiber carding machines, and the other conveys the zinc alginate fibers to 4 opposing zinc alginate fiber carding machines. The 20 carding machines 30 are arranged in two rows (10 machines per group) facing each other; the first 16 carding machines card the degreased cotton fibers to create a degreased cotton fiber web, and the last 4 carding machines card the zinc alginate fibers to create a zinc alginate fiber web; each machine produces a carding weight of 15 g / m². 2 The fiber web has a total weight of 300g / m². 2 Fiber web.

[0031] (2) 10 non-woven cotton sheets were obtained The resulting fiber web is sequentially turned and stacked by guide rollers, and then conveyed to the light hydroentangling machine 60 by the cotton web conveying curtain 50. The light hydroentangling machine 60 then produces light hydroentangled nonwoven cotton sheet 10. The hydroentangling pressure is set at 34-36 bar (the hydroentangling pressure is different in different experimental groups in Example 1, and is 34 bar, 35 bar, 35.5 bar and 36 bar in Examples 1-1 to 1-4 respectively). Among them, such as Figure 1As shown, the resulting lightweight spunlace nonwoven cotton sheet 10 exhibits a nonwoven fabric state on both sides (i.e., the two sides are fabric), with a loose fiber web in the middle (also known in the textile industry as: lightweight spunlace nonwoven fabric, cotton sheet, etc.). The nonwoven web consists of two layers: One layer is a layer of degreased cotton spunlace nonwoven fabric 100, and the other layer is a layer of zinc alginate spunlace nonwoven fabric 200. The two layers are spunlace composite together, with the fibers in the middle of the two layers intersecting, hooking and entangled together without obvious separation (as shown in Figure 1). The core design of this step lies in: Zinc alginate fibers form a gel when they come into contact with bodily fluids. This gel blocks the channels through which liquid is transferred to the spunlace nonwoven fabric, thus preventing the fabric from absorbing bodily fluids. Through the specific design of this application, when the zinc alginate fibers form a gel layer and hinder water absorption, the movement of the human body (including turning over) can break up the gel and open the channels, thereby ensuring that the absorbent cotton layer continuously absorbs bodily fluids.

[0032] In this application, the basis weight of the degreased cotton layer must be greater than that of the zinc alginate fiber layer, and the ratio between the two is approximately (4-4.1):(0.98-1.15). The ratio varies in different experimental groups in Example 1; Examples 1-5 to 1-8 have ratios of 4:1, 4:1.15, 4:0.98, and 4.1:1, respectively, with a total basis weight of 300 kg / m³. 2 For example, when the ratio is 4:1, the basis weight of the degreased cotton spunlace nonwoven fabric is 240 g / m². 2 Zinc alginate spunlace nonwoven fabric, 60 g / m² 2 The absorbency of absorbent cotton should be ≥23 times (National Standard YY / T0330-2015 Medical Absorbent Cotton requires an absorbency of 23 times). Therefore, the absorbent cotton's light hydroentangled layer is mainly used to absorb body fluids. This ensures that in the resulting nonwoven cotton sheet 10, the absorbent cotton can dominate the absorption of body fluids, allowing zinc alginate to fully provide antibacterial and gel-forming effects, while effectively preventing the gel layer from blocking the absorbent channels.

[0033] The hydroentangling pressure of the light hydroentangling machine 60 is set at 34-36 bar, so that the fibers on the fabric surface do not become completely entangled. After being lightly hydroentangled, the composite cotton web exhibits a slightly entangled effect on both sides, with a fluffy cotton sheet in the middle. The purpose and effect of achieving this effect is to ensure that the absorbency of the degreased cotton light hydroentangled nonwoven fabric layer 100 is not hindered, while also ensuring that the gel layer is broken.

[0034] Step 2: Shaping Non-woven cotton pads 10 are dried, rolled, extruded, slit, and shaped in a dryer 70 to produce tampons; wherein, before the tampons are shaped and extruded, a bio-fluorescent traction thread is placed in the middle of the lightly hydroentangled non-woven cotton pads 10.

[0035] Non-woven cotton sheets are wound into strips in a structure such as... Figure 2 As shown, the zinc alginate spunlace nonwoven fabric layer 200 is the outermost layer, and the degreased cotton spunlace nonwoven fabric layer 100 is the innermost layer.

[0036] This product is a bio-fluorescent traction thread made by impregnating a double-stranded yarn with a bio-fluorescent agent (Chitosan-FITC). The double-stranded yarn is a blend of 25% zinc alginate fiber and 75% degreased cotton fiber, with a yarn count of 8-10, twisted together. This double-stranded yarn, impregnated with the bio-fluorescent agent (Chitosan-FITC), is left outside the vagina as a "tampon traction thread." When the user forgets they are still wearing a tampon, the fluorescence will prompt them to remove it promptly, avoiding prolonged use. (Chitosan-FITC is non-toxic, non-irritating, and non-allergenic, with good biocompatibility. It is frequently used in pharmaceuticals, medical devices, and cosmetics.)

[0037] The final structure of the tampons is as follows: a non-woven cotton sheet 10 is wound into a strip, and a bio-fluorescent traction thread is provided in the middle of the non-woven cotton sheet 10.

[0038] It should be noted that the variable in Examples 1-1 to 1-4 is the different ratio of hydroentanglement pressure, while the ratio of fiber web remains constant (4:1) in this group of experiments; the variable in Examples 1-5 to 1-8 is the different ratio of fiber web, while the hydroentanglement pressure remains constant (35 bar) in this group of experiments.

[0039] Comparative Example 1 (Sodium Alginate Fiber) The only difference from Example 1 is that sodium alginate fiber is used instead of zinc alginate fiber; the other preparation processes and conditions are the same as in Example 1.

[0040] Comparative Example 2 (Antibacterial Bamboo Fiber) The only difference from Example 1 is that antibacterial bamboo fiber is used instead of zinc alginate fiber, while the other preparation processes and conditions are the same as in Example 1.

[0041] Comparative Example 3 (Degreased Cotton Fiber) The only difference from Example 1 is that degreased cotton fiber is used instead of zinc alginate fiber; the other preparation processes and conditions are the same as in Example 1.

[0042] Comparative Example 4 (The zinc ion content of sodium alginate fiber is 124.6 mg / g, which is lower than the actual content) The only difference from Example 1 is that the zinc ion content of the sodium alginate fiber is 124.6 mg / g, while the other preparation processes and conditions are the same as in Example 1.

[0043] Comparative Example 5 (The zinc ion content of sodium alginate fiber is 84.9 mg / g, which is lower than the actual content). The only difference from Example 1 is that the zinc ion content of the sodium alginate fiber is 84.9 mg / g, while the other preparation processes and conditions are the same as in Example 1.

[0044] Comparative Example 6 (Sodium alginate fiber with zinc chloride as a coagulant has a relatively high zinc ion content). The only difference from Example 1 is that the zinc ion content of the sodium alginate fiber is 184.4 mg / g. The other preparation processes and conditions are the same as in Example 1. The product obtained is extremely likely to cause human poisoning.

[0045] Comparative Example 7 (lower hydroentangling pressure in light hydroentangling process) The only difference between Comparative Example 7-1 and Example 1 is that the hydroentangling pressure in the light hydroentangling process is 25 bar; the other preparation processes and conditions are the same as in Example 1. The resulting product has a fuzzy surface, easily adheres to the human body, and leaves fibers inside the body.

[0046] In addition, the hydroentangling pressures of the light hydroentangling process in Comparative Examples 7-2 to 7-5 were 30 bar, 29 bar, 31 bar, and 30.5 bar, respectively. The test results are shown in Table 6, indicating that the surface of the product is too soft and the fibers are easy to fall off.

[0047] Comparative Example 8 (The hydroentangling pressure in the light hydroentangling process is too high) The only difference between Comparative Example 8-1 and Example 1 is that the hydroentangling pressure of the light hydroentangling process is 40 bar, while the other preparation processes and conditions are the same as in Example 1. The resulting product has a dense, hardened surface, poor softness, and is prone to injury from intense friction.

[0048] In addition, the hydroentangling pressures of the light hydroentangling process in Comparative Examples 8-2 to 8-5 were 40 bar, 39 bar, 41 bar, and 38 bar, respectively. The test results are shown in Table 6, indicating that the surface of the product is too hard, has a frictional feel, and is easy to harm the human body.

[0049] Comparative Example 9 (the specific gravity of the degreased cotton fiber web is relatively low) The only difference between Comparative Example 9-1 and Example 1 is that the weight ratio of degreased cotton fiber web to zinc alginate fiber web is 2:1, while the other preparation processes and conditions are the same as in Example 1.

[0050] In Comparative Example 9-1, the proportion of zinc alginate fiber web was relatively increased, while the proportion of absorbent cotton fiber web was relatively small (outside the specified range). This is because the water absorption of alginate fiber is 2.9 times that of zinc alginate fiber, and the proportion at this point resulted in a smaller overall ability of the tampon to absorb bodily fluids, which could not meet the required absorption capacity. In addition, since zinc alginate fiber is relatively expensive, increasing its proportion in the tampon at this point also increased the cost of the tampon.

[0051] In addition, the weight ratios of degreased cotton fiber web and zinc alginate fiber web in Comparative Examples 9-2 to 9-5 were 3.4:1, 3.3:1, 3.2:1, and 3.1:1, respectively. The test results are shown in Table 6, indicating that the water absorption effect of the products was not good.

[0052] Comparative Example 10 (the specific gravity of the degreased cotton fiber web is too high) The only difference between Comparative Example 10-1 and Example 1 is that the weight ratio of zinc alginate fiber web to degreased cotton fiber web is 1:6, while the other preparation processes and conditions are the same as in Example 1.

[0053] In Comparative Example 10-1, the proportion of absorbent cotton fiber web is relatively large, and the proportion of zinc alginate fiber web is relatively small (outside the specified range). Increasing the proportion of absorbent cotton will reduce the antibacterial performance of the tampons, making it impossible to guarantee their ability to inhibit the growth of bacteria and fungi.

[0054] In addition, the weight ratios of degreased cotton fiber web and zinc alginate fiber web in Comparative Examples 10-2 to 10-5 were 4:0.95, 4:0.9, 4:0.92, and 4:0.88, respectively. The test results are shown in Table 6, indicating that the antibacterial effect of the prepared products was not good.

[0055] The performance of the embodiments and comparative examples was tested: 1. The influence of zinc alginate fiber design on the results (1) Verification of antibacterial properties, biocompatibility, and cytotoxicity of Example 1 of this application: For the zinc alginate fiber in Example 1, the zinc ion content was selected to be 164.4 mg / g. The results of the antibacterial properties, biocompatibility, and cytotoxicity verification of the product are shown in Table 2 below: Table 2 characteristic describe Application Implications Antibacterial properties It has an antibacterial efficacy of over 99% against a variety of pathogenic bacteria. Ideal for use in medical dressings, high-end hygiene products, and textiles such as underwear requiring antibacterial properties. Biocompatibility At this point, the rate of zinc ion release should be controlled to meet the daily human requirement of 8-11 mg / g, which is below the toxic threshold of 50 mg / g. Suitable for prolonged contact with skin and even wounds, and unlikely to cause allergies or rejection. Cytotoxicity Studies show that the cytotoxicity of zinc alginate fiber eluent containing nano-zinc oxide is grade 2 or lower. This indicates that it is safe for human cells under normal use conditions. The results showed that the antibacterial properties, biocompatibility, and cytotoxicity of zinc alginate fiber met the requirements for sanitary tampons.

[0056] (2) Results of the effect of using different fibers on product performance The results of comparing the adaptability of products made from different fibers for use as tampons are shown in Table 3 below. Table 3 Group Fiber varieties Antibacterial properties, % Water absorption, g / g Example 1 Zinc alginate fiber It has good antibacterial properties, ≥99.5%. Zinc alginate has a water absorption rate 2.9 times higher. Comparative Example 1 Sodium alginate fiber Possesses certain performance characteristics, ≤30% Sodium alginate has a water absorption capacity of 30 times. Comparative Example 2 Antibacterial bamboo fiber Good antibacterial properties ≤90% Antibacterial bamboo fiber has 3 times the water absorption. Comparative Example 3 degreased cotton fibers none Defatted cotton fibers have a water absorption capacity of 23 times. Group It becomes gel-like after absorbing water. Water-absorbing environment Meets sanitary tampons standards Example 1 More durable, better gel pH=6~8 Exceed Comparative Example 1 It is relatively brittle and exhibits a gel-like phenomenon. pH=7~8 Exceed Comparative Example 2 No gelation irrelevant satisfy Comparative Example 3 none irrelevant Exceed The water absorption ratio refers to the ratio of the saturated water absorption weight to the dry weight (the basis for comparison), and is the main indicator of water absorption performance.

[0057] The results show that, based on comprehensive judgment, the scheme of zinc alginate fiber mixed with degreased cotton in Example 1 is more suitable for preparing sanitary tampons than sodium alginate, bamboo fiber, etc.

[0058] (3) The effects of different zinc contents in zinc alginate fiber on product performance are shown in Table 4: Table 4 Group Zinc ion content, mg / g Kill rate of Bacillus subtilis, % Sterilization rate against Staphylococcus aureus, % Biocompatibility or cytotoxicity Comparative Example 6 184.4 99.99 99.9999 After controlling the zinc ion release, the test results were unsatisfactory, indicating a toxicity level of 2. Example 1 164.4 99.77 98 Zinc ion release is controllable, toxicity is less than level 1, and the test results are satisfactory. Comparative Example 4 124.6 28.18 is unqualified. - Zinc ion release is controllable, toxicity is less than level 1, and the test results are satisfactory. Comparative Example 5 84.9 7.69 is unqualified. - Zinc ion release can be left uncontrolled; toxicity level is less than 1; and the test results are satisfactory. (4) The effects of different hydroentangling pressure parameters on product performance in the light hydroentangling process are shown in Table 5: Table 5

[0059] (5) The effect of different basis weight ratios of zinc alginate fiber web and degreased cotton fiber web on product performance is shown in Table 6: Table 6

[0060] It should be noted that the description in the examples of "inhibiting microbial growth and meeting physiological requirements for absorbency" indicates that it meets the relevant provisions of the tampon standard GB / T43585-2023. As can be seen from the test results in Tables 1-6 above, the product prepared in this application meets the relevant provisions of GB15979-2024 "Hygienic Requirements for Disposable Sanitary Products" and the tampon standard GB / T43585-2023.

[0061] In addition, the test methods or standards for each performance indicator in Table 1-5 above are as follows: Antibacterial properties: GB15979-2024; Biocompatibility: GB / T43585-2023; Cytotoxicity: GB / T1688.6-2017; Water absorption: GB / T43585-2023; Medical absorbent cotton conforms to the standard: GB / TYY0330-2015; The testing standard for seaweed fiber is GB / T35443-2024, "Quantitative Chemical Analysis of Textiles: Mixtures of Seaweed Fiber and Certain Other Fibers".

[0062] In summary, the proposed solution has at least the following design concepts and beneficial effects: Material and structural innovations: By employing a specific ratio (1:4) of zinc alginate fiber to absorbent cotton fiber and a lightweight spunlace composite structure, a synergistic effect of antibacterial properties, high absorbency (absorbent cotton absorbs ≥23 times its weight), and gel control is achieved. Zinc alginate forms a gel upon contact with bodily fluids, but its loose internal structure ensures that the gel can be broken up by movement, preventing blockage. The specific zinc ion content and release rate design of the zinc alginate fiber ensures that the resulting tampons possess both excellent antibacterial properties (99.77% kill rate against Bacillus subtilis) and biocompatibility.

[0063] Innovative safety features: The bio-fluorescent traction thread provides proactive safety alerts by being impregnated with chitosan labeled with fluorescein, addressing the risk of users forgetting to remove it.

[0064] Innovative process parameters: A specific hydroentanglement pressure (35 bar) ensures uniform fiber composite and optimized structure. Through the specific design of this process parameter, the nonwoven cotton sheet 10 exhibits a structure with slight entanglement on both sides and a fluffy middle. This structure ensures the strength of the cotton sheet while maintaining the fluffy middle of the nonwoven cotton sheet 10 to promote water absorption and gel bursting.

[0065] Overall progress: This application comprehensively solves the problems of antibacterial properties, water absorption, and safety warning that the existing technology could not address simultaneously. Experimental data shows that zinc alginate fiber has an antibacterial rate of over 99% with zinc ion content and good biocompatibility.

[0066] In summary, the tampons provided in this application combine highly effective antibacterial, highly absorbent, and anti-retention functions with biocompatibility (non-toxic), solving the problems of existing tampons that are difficult to balance antibacterial and absorbent properties, gel blockage, and safety during use. They have good application prospects and market value.

[0067] It should be noted that: This application describes tampons as being strip-shaped, which can be a regular cylindrical or conical structure, or an irregular cylindrical or conical structure, or a polygonal columnar or polygonal conical structure, and can be adapted to meet market demand for tampon shapes.

[0068] In this article, “~” is used to represent a numerical range, and this expression indicates a range that includes two endpoint values.

[0069] In addition to the specific choices shown in the above embodiments, any formulation range described above can be used in specific implementations, including but not limited to the above embodiment schemes.

[0070] The specific parameters or some commonly used reagents or raw materials in the above embodiments are specific or preferred embodiments under the concept, and not limitations thereof; those skilled in the art can make adaptive adjustments within the concept and protection scope.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate technical solutions and are not intended to limit them. Although the foregoing embodiments have been described in detail, 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions in the embodiments.

Claims

1. A type of antibacterial zinc alginate tampon, characterized in that, It includes a strip-shaped body formed by winding non-woven cotton sheets, wherein a bio-fluorescent traction line is provided in the middle of the non-woven cotton sheets; The nonwoven cotton sheet is formed by combining zinc alginate fiber web and degreased cotton fiber web using a light hydroentanglement process; wherein, the nonwoven cotton sheet includes a degreased cotton light hydroentangled nonwoven fabric layer and a zinc alginate light hydroentangled nonwoven fabric layer, and the two layers are in a fluffy fiber web hydroentangled composite form. The biofluorescent traction wire is impregnated with a biofluorescent agent; The basis weight of the degreased cotton fiber web is greater than that of the zinc alginate fiber web, and the basis weight ratio of the degreased cotton fiber web to the zinc alginate fiber web is (4-4.1):(0.98-1.15).

2. The tampons according to claim 1, characterized in that, The weight ratio of the degreased cotton fiber web to the zinc alginate fiber web is 4:

1.

3. The tampons according to claim 2, characterized in that, The total weight of the nonwoven cotton sheet is 285–315 g / m². 2 .

4. The tampon according to claim 1, characterized in that, The zinc alginate fiber web is composed of zinc alginate fibers, and the zinc ion content in the zinc alginate fibers is from 150 mg / g to 164.4 mg / g.

5. The tampon according to claim 1, characterized in that, The hydroentangling pressure of the light hydroentangling process is 34-36 bar.

6. The tampon according to claim 1, characterized in that, The biofluorescent agent is fluorescein-labeled chitosan-FITC; The bio-fluorescent traction thread can emit fluorescence under visible light to remind the user to remove the tampons in time.

7. The tampon according to claim 1, characterized in that, The biofluorescent traction thread is a double-strand yarn impregnated with a biofluorescent agent.

8. A method for preparing a tampon as described in any one of claims 1-7, characterized in that, Includes the following steps: Preparation of nonwoven cotton sheet: Degreased cotton fiber and zinc alginate fiber are provided, and the degreased cotton fiber and zinc alginate fiber are compounded into nonwoven cotton sheet by a light hydroentanglement process; wherein the hydroentanglement pressure is 34-36 bar. Placement of bio-fluorescent traction thread: Place a bio-fluorescent traction thread in the middle of the non-woven cotton sheet; Molding: The non-woven cotton sheet is dried, rolled, squeezed, cut and shaped to obtain sanitary tampons.

9. The method for preparing tampons according to claim 8, characterized in that, The process for preparing nonwoven cotton sheets is as follows: The degreased cotton fibers are fed into a carding machine for combing, forming a degreased cotton fiber web. Zinc alginate fibers are fed into a carding machine for combing, forming a zinc alginate fiber web. The degreased cotton fiber web and the zinc alginate fiber web are stacked and then hydroentangled using a light hydroentanglement machine at a hydroentanglement pressure of 34-36 bar to form the nonwoven cotton sheet.

10. The method for preparing a tampon according to claim 8, characterized in that, The ratio of the number of carding machines for degreased cotton fibers to the number of carding machines for zinc alginate fibers is 1:4.

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