Anti-leakage tampon and preparation method thereof

Abstract

The preparation method comprises the following steps that S1, cotton fibers are carded, the carded cotton fibers are laid into single-layer cotton fibers after being carded, and then the single-layer cotton fibers are stacked, shaped and cut to obtain a cotton fiber layer; s2, the cotton fiber layer is wrapped with non-woven fabric and pressed to obtain a strip-shaped fiber layer, then anti-leakage cotton threads are fixed to the center of the strip-shaped fiber layer, the tail ends of the anti-leakage cotton threads are exposed out of the strip-shaped fiber layer by 10-20 cm, and the strip-shaped fiber layer with the cotton threads is obtained, the length section, exposed out of the strip-shaped fiber layer, of the tail end of the anti-leakage cotton thread is provided with a water-absorbing anti-leakage coating, so that menstrual blood is prevented from flowing out along the cotton thread; s3, the strip-shaped fiber layer with the cotton threads is curled to form a strip-shaped cylindrical absorber, microwave heating treatment is conducted after pressing forming is conducted in a forming device, and a tampon body of the tampon is obtained; and S4, the tampon body of the tampon is put into a guide pipe, and the anti-leakage tampon is obtained. The tampon provided by the invention can prevent menstrual blood from leaking.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, and in particular to an anti-leakage tampon and a preparation method thereof. Background Art

[0002] Tampons, also known as sanitary plugs, are a cotton cylinder, mainly made of cotton, synthetic fibers or a mixture of these two materials, with diameters ranging from 1 cm to 1.9 cm, and a cotton thread (drawstring) attached to the tail end. The convenience of tampons meets the new needs of consumers. Compared with sanitary napkins, women can dress, move, work, exercise, relax, and have fun freely when using tampons, without suffering from leakage or worries. They are gradually being accepted by domestic consumers, especially young people. When women have their period, tampons can be inserted into the vagina to absorb menstrual blood. They have attracted much attention because of their small size, comfortable use, low leakage, and excellent absorption capacity.

[0003] Generally speaking, there are small water droplets on the packaging of tampons, which are the logo for the absorption capacity of tampons. 1 to 6 water drops are used to indicate the absorption capacity of the product: 1 water drop represents the smallest absorption capacity, and 6 water drops represent the largest absorption capacity. Female friends should choose according to their own circumstances. If the flow rate is relatively large, and a tampon with relatively small absorption capacity is selected, leakage may occur. Therefore, how to prepare a tampon that avoids leakage is the key issue studied in this invention. Summary of the invention

[0004] The main purpose of the present invention is to provide an anti-leakage tampon and a preparation method thereof, aiming to solve the problem of leakage caused by incorrect selection of tampons or excessive menstrual blood volume during use.

[0005] To achieve the above object, the present invention provides a method for preparing a leakage-proof tampon, comprising the following steps:

[0006] S1, combing the cotton fibers, laying them into a single layer of cotton fibers after combing, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer;

[0007] S2, wrapping the cotton fiber layer with a non-woven fabric, pressing to obtain a strip fiber layer, and then fixing an anti-leakage cotton thread at the center of the strip fiber layer, with the tail end of the anti-leakage cotton thread exposed 10-20 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread, wherein the length section where the tail end of the anti-leakage cotton thread is exposed in the strip fiber layer is provided with a water-absorbing anti-leakage coating to prevent menstrual blood from flowing out along the cotton thread;

[0008] S3, curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body;

[0009] S4, inserting the tampon body of the tampon into the catheter to obtain a leakage-proof tampon.

[0010] Preferably, the water-absorbing and leak-proof coating includes a water-absorbing coating and a waterproof coating.

[0011] Preferably, the method for preparing the water-absorbing coating comprises the following steps:

[0012] Add distilled water to a reaction container filled with cassava starch, then heat it up, gelatinize it, then cool it down, then add ammonium persulfate, add dropwise acrylamide, sodium p-toluenesulfonate and N,N-methylenebisacrylamide mixed solution after stirring, add diatomaceous earth at the same time, continue stirring the polymerization reaction, filter and wash to obtain a water-absorbing material; apply the water-absorbing material to the surface of a cotton thread, and then dry to obtain a water-absorbing coating.

[0013] Preferably, the heating temperature is 70-90°C, the gelatinization time is 25-35 min, the cooling temperature is 55-65°C, the polymerization reaction time is 2.5-3.5 h, and the drying temperature is 55-65°C.

[0014] Preferably, the usage ratio of cassava starch, acrylamide, sodium p-toluenesulfonate, N,N-methylenebisacrylamide and diatomaceous earth is (4-6 g): (3-5 mL): (0.8-1.2 mL): (0.4-0.6 mL): (0.01-0.05 g).

[0015] Preferably, the method for preparing the waterproof coating comprises the following steps:

[0016] Add sodium hydroxide solution to silicon tetrachloride, stir to react, then add methyltrimethoxysilane, heat to react, then wash and dry to obtain hydrophobic nano-silica; add tetrahydrofuran and N,N-dimethylformamide mixed solvent to a reaction container filled with thermoplastic polyurethane, then add the hydrophobic nano-silica, add N,N-dimethylformamide, ultrasonically disperse, and obtain a waterproof material; spray the waterproof material on the surface of the water-absorbing coating, dry, and obtain a waterproof coating.

[0017] Preferably, the temperature of the heating reaction is 90-110°C.

[0018] Preferably, the volume ratio of silicon tetrachloride to methyltrimethoxysilane is 2 to 8:1.

[0019] Preferably, the usage ratio of the thermoplastic polyurethane, tetrahydrofuran, N,N-dimethylformamide and hydrophobic nano-silica is (12-16 mL): (0.2-0.3 mL): (0.5-0.8 mL): (0.2-1 mg).

[0020] Preferably, in step S2, the weight of the strip fiber layer is 300 to 900 g / m 2 .

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) The method for preparing the leakage-proof tampon provided by the present invention can absorb the menstrual blood flowing down from the strip fiber layer and isolate the menstrual blood from remaining, thereby avoiding embarrassing situations for users, by sequentially providing a water-absorbing coating and a waterproof coating on the lower end surface of the cotton thread.

[0023] (2) The present invention grafts acrylamide and sodium p-toluenesulfonate onto the molecular chain of cassava starch to form a cross-linked network, and then introduces diatomaceous earth, an inorganic particle with water absorption performance, to increase the specific surface area, thereby preparing a material with high water absorption performance, so that a small amount of menstrual blood leaked from the main part of the tampon can be absorbed to prevent leakage. At the same time, the material has good adsorption performance with the cotton fiber component of the cotton thread, which can prevent the coating from falling off.

[0024] (3) The present invention forms an ordered three-dimensional structure by cross-linking through the reaction of thermoplastic polyurethane and silicon oxide compounds. The structure is non-ionic, contains no hydrophilic groups, and has low surface energy. Nano-silicon dioxide can construct a micro-nano rough structure on the surface. Through the synergistic effect of low surface energy and micro-nano structure, a super-hydrophobic functional surface is obtained, thereby playing a waterproof role. At the same time, the modified polyurethane component of the coating and the modified starch have adsorption properties, which can fit tightly to prevent the coating from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a flow chart of the method for preparing the leakage-proof tampon provided by the present invention.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] To make the purpose, technical scheme and advantages of the embodiment of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described below. If the specific conditions are not specified in the embodiment, it is carried out according to the normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially. In addition, the technical schemes between the various embodiments can be combined with each other, but must be based on the ability of ordinary technicians in the field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist, and is not within the scope of protection required by the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention.

[0029] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the following embodiments are only used to explain the present invention and are not used to limit the present invention.

[0030] Embodiment 1 A method for preparing a leakage-proof tampon comprises the following steps:

[0031] (1) combing the cotton fibers, laying them into a single layer of cotton fibers after the combing is completed, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer;

[0032] (2) Wrapping the cotton fiber layer with a non-woven fabric and pressing it to obtain a strip fiber layer, and then fixing an anti-leakage cotton thread at the center of the strip fiber layer, with the tail end of the anti-leakage cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread, wherein the length section where the tail end of the anti-leakage cotton thread is exposed in the strip fiber layer is provided with a water-absorbing anti-leakage coating to prevent menstrual blood from flowing out along the cotton thread;

[0033] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body;

[0034] (4) inserting the tampon body of the tampon into a catheter to obtain a leakage-proof tampon;

[0035] The water-absorbing and leak-proof coating comprises a water-absorbing coating and a waterproof coating;

[0036] The preparation method of the water-absorbing coating comprises the following steps:

[0037] Add 10 mL of distilled water to a reaction container containing 5 g of cassava starch, then heat to 80° C., gelatinize, then cool to 60° C., then add 0.2 g of ammonium persulfate, and after stirring, drop 4 mL of acrylamide, 1 mL of sodium p-toluenesulfonate and 0.5 mL of a mixed solution of N,N-methylenebisacrylamide, and simultaneously add 0.03 g of diatomaceous earth, continue stirring for polymerization reaction, filter, and wash to obtain a water-absorbing material; apply the water-absorbing material to the surface of a cotton thread, and then dry to obtain a water-absorbing coating;

[0038] The preparation method of the waterproof coating comprises the following steps:

[0039] Add 10 mL of sodium hydroxide solution to 6 mL of silicon tetrachloride, stir to react, then add 1 mL of methyltrimethoxysilane, heat to 100°C for reaction, then wash and dry to obtain hydrophobic nano-silica; add 0.25 mL of tetrahydrofuran and 0.6 mL of N,N-dimethylformamide mixed solvent to a reaction container containing 14 mL of thermoplastic polyurethane, then add 0.5 mg of hydrophobic nano-silica, and add N,N-dimethylformamide, ultrasonically disperse, and prepare a waterproof material; spray the waterproof material on the surface of the water-absorbing coating, dry, and obtain a waterproof coating.

[0040] Embodiment 2 A method for preparing a leakage-proof tampon comprises the following steps:

[0041] (1) combing the cotton fibers, laying them into a single layer of cotton fibers after the combing is completed, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer;

[0042] (2) Wrapping the cotton fiber layer with a non-woven fabric and pressing it to obtain a strip fiber layer, and then fixing an anti-leakage cotton thread at the center of the strip fiber layer, with the tail end of the anti-leakage cotton thread exposed 10 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread, wherein the length section where the tail end of the anti-leakage cotton thread is exposed in the strip fiber layer is provided with a water-absorbing anti-leakage coating to prevent menstrual blood from flowing out along the cotton thread;

[0043] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body;

[0044] (4) inserting the tampon body of the tampon into a catheter to obtain a leakage-proof tampon;

[0045] The water-absorbing and leak-proof coating comprises a water-absorbing coating and a waterproof coating;

[0046] The preparation method of the water-absorbing coating comprises the following steps:

[0047] Add distilled water to a reaction container containing 4 g of cassava starch, then heat to 80° C., gelatinize, then cool to 55° C., then add 0.2 g of ammonium persulfate, stir, drop 3 mL of acrylamide, 0.8 mL of sodium p-toluenesulfonate and 0.4 mL of a mixed solution of N,N-methylenebisacrylamide, add 0.01 g of diatomaceous earth, continue stirring, polymerize, and then filter and wash to obtain a water-absorbing material; apply the water-absorbing material to the surface of a cotton thread, and then dry to obtain a water-absorbing coating;

[0048] The preparation method of the waterproof coating comprises the following steps:

[0049] Add 8 mL of sodium hydroxide solution to 2 mL of silicon tetrachloride, stir to react, then add 1 mL of methyltrimethoxysilane, heat to 90°C for reaction, then wash and dry to obtain hydrophobic nano-silica; add 0.2 mL of tetrahydrofuran and 0.5 mL of N,N-dimethylformamide mixed solvent to a reaction container containing 12 mL of thermoplastic polyurethane, then add 0.2 mg of hydrophobic nano-silica, and add N,N-dimethylformamide, ultrasonically disperse, and prepare a waterproof material; spray the waterproof material on the surface of the water-absorbing coating, dry, and obtain a waterproof coating.

[0050] Embodiment 3 A method for preparing a leakage-proof tampon comprises the following steps:

[0051] (1) combing the cotton fibers, laying them into a single layer of cotton fibers after the combing is completed, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer;

[0052] (2) Wrapping the cotton fiber layer with a non-woven fabric and pressing it to obtain a strip fiber layer, and then fixing an anti-leakage cotton thread at the center of the strip fiber layer, with the tail end of the anti-leakage cotton thread exposed 20 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread, wherein the length section where the tail end of the anti-leakage cotton thread is exposed in the strip fiber layer is provided with a water-absorbing anti-leakage coating to prevent menstrual blood from flowing out along the cotton thread;

[0053] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body;

[0054] (4) inserting the tampon body of the tampon into a catheter to obtain a leakage-proof tampon;

[0055] The water-absorbing and leak-proof coating comprises a water-absorbing coating and a waterproof coating;

[0056] The preparation method of the water-absorbing coating comprises the following steps:

[0057] Add distilled water to a reaction container containing 6 g of cassava starch, then heat it to 90° C. for gelatinization, then cool it to 65° C., then add 0.2 g of ammonium persulfate, and after stirring, drop 6 mL of acrylamide, 1.2 mL of sodium p-toluenesulfonate and 0.6 mL of a mixed solution of N,N-methylenebisacrylamide, and add 0.05 g of diatomaceous earth at the same time, continue stirring the polymerization reaction, filter, and wash to obtain a water-absorbing material; apply the water-absorbing material to the surface of a cotton thread, and then dry to obtain a water-absorbing coating;

[0058] The preparation method of the waterproof coating comprises the following steps:

[0059] 12 mL of sodium hydroxide solution was added to 8 mL of silicon tetrachloride, and the mixture was stirred for reaction. Subsequently, 1 mL of methyltrimethoxysilane was added, and the mixture was heated to 110° C. for reaction, and then washed and dried to obtain hydrophobic nano-silica. 0.3 mL of tetrahydrofuran and 0.8 mL of N,N-dimethylformamide mixed solvent were added to a reaction container containing 16 mL of thermoplastic polyurethane, and then 1 mg of hydrophobic nano-silica was added, and N,N-dimethylformamide was added, and ultrasonic dispersion was performed to obtain a waterproof material. The waterproof material was sprayed on the surface of the water-absorbing coating, and the mixture was dried to obtain a waterproof coating.

[0060] Comparative Example 1 A method for preparing a tampon comprises the following steps:

[0061] (1) combing the cotton fibers, laying them into a single layer of cotton fibers after the combing is completed, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer;

[0062] (2) Wrapping the cotton fiber layer with a non-woven fabric and pressing it to obtain a strip fiber layer, and then fixing an anti-leakage cotton thread at the center of the strip fiber layer, with the tail end of the anti-leakage cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread, wherein the length section where the tail end of the anti-leakage cotton thread is exposed in the strip fiber layer is provided with a water-absorbing anti-leakage coating to prevent menstrual blood from flowing out along the cotton thread;

[0063] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body;

[0064] (4) inserting the tampon body of the tampon into a catheter to obtain a leakage-proof tampon;

[0065] The water-absorbing and leak-proof coating comprises a waterproof coating;

[0066] The preparation method of the waterproof coating comprises the following steps:

[0067] Add 10 mL of sodium hydroxide solution to 6 mL of silicon tetrachloride, stir to react, then add 1 mL of methyltrimethoxysilane, heat to 100°C for reaction, then wash and dry to obtain hydrophobic nano-silica; add 0.25 mL of tetrahydrofuran and 0.6 mL of N,N-dimethylformamide mixed solvent to a reaction container containing 14 mL of thermoplastic polyurethane, then add 0.5 mg of hydrophobic nano-silica, and add N,N-dimethylformamide, ultrasonically disperse, and prepare a waterproof material; spray the waterproof material on the surface of the water-absorbing coating, dry, and obtain a waterproof coating.

[0068] Comparative Example 2 A method for preparing a tampon comprises the following steps:

[0069] (1) combing the cotton fibers, laying them into a single layer of cotton fibers after the combing is completed, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer;

[0070] (2) Wrapping the cotton fiber layer with a non-woven fabric and pressing it to obtain a strip fiber layer, and then fixing an anti-leakage cotton thread at the center of the strip fiber layer, with the tail end of the anti-leakage cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread, wherein the length section where the tail end of the anti-leakage cotton thread is exposed in the strip fiber layer is provided with a water-absorbing anti-leakage coating to prevent menstrual blood from flowing out along the cotton thread;

[0071] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body;

[0072] (4) inserting the tampon body of the tampon into a catheter to obtain a leakage-proof tampon;

[0073] The water-absorbing and leak-proof coating comprises a water-absorbing coating;

[0074] The preparation method of the water-absorbing coating comprises the following steps:

[0075] 10 mL of distilled water is added to a reaction container containing 5 g of cassava starch, and then the temperature is raised to 80° C. for gelatinization, and then the temperature is lowered to 60° C., followed by adding 0.2 g of ammonium persulfate, and after stirring, 4 mL of acrylamide, 1 mL of sodium p-toluenesulfonate and 0.5 mL of a mixed solution of N,N-methylenebisacrylamide are added dropwise, and 0.03 g of diatomaceous earth is added at the same time, and the polymerization reaction is continued by stirring, and then filtered and washed to obtain a water-absorbing material; the water-absorbing material is coated on the surface of a cotton thread, and then dried to obtain a water-absorbing coating.

[0076] Comparative Example 3 A method for preparing a tampon comprises the following steps:

[0077] (1) combing the cotton fibers, laying them into a single layer of cotton fibers after the combing is completed, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer;

[0078] (2) wrapping the cotton fiber layer with a non-woven fabric and pressing it to obtain a strip fiber layer, and then fixing a common cotton thread to the center of the strip fiber layer, with the tail end of the common cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0079] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body;

[0080] (4) The tampon body of the tampon is placed into a catheter to obtain a leakage-proof tampon.

[0081] Test methods and results

[0082] The strip fiber layers of the tampons prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were processed into the same weight of 4 g, and the liquid absorption of the tampons prepared in Examples 1 to 3 and Comparative Examples 1 to 3 was tested respectively. When the absorption amount exceeded 1 g, it was observed whether there was liquid dripping from the tail end of the cotton thread, and Table 1 was obtained.

[0083] Table 1 Statistics of absorption test and dripping test

[0084] Group Absorption Is there any liquid dripping? Example 1 18g no Example 2 16g no Example 3 17g no Comparative Example 1 12g have Comparative Example 2 14g Small amount Comparative Example 3 11g have

[0085] It can be seen from the above table that compared with the use of ordinary cotton thread in Comparative Example 3, and the lack of a water-absorbing coating and a waterproof coating at the lower end of the cotton thread in Comparative Examples 1 and 2, the tampon prepared by the present invention can improve its water absorption performance and prevent liquid leakage.

[0086] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the patent protection scope of the present invention.

Claims

1. A method for preparing a leakage-proof tampon, characterized in that: The following steps are involved: S1, combing the cotton fibers, laying them into a single layer of cotton fibers after combing, and then stacking, shaping and cutting the single layer of cotton fibers to obtain a cotton fiber layer; S2, wrapping the cotton fiber layer with a non-woven fabric, pressing to obtain a strip fiber layer, and then fixing an anti-leakage cotton thread at the center of the strip fiber layer, with the tail end of the anti-leakage cotton thread exposed 10-20 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread, wherein the length section where the tail end of the anti-leakage cotton thread is exposed in the strip fiber layer is provided with a water-absorbing anti-leakage coating to prevent menstrual blood from flowing out along the cotton thread; S3, curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding in a former, and then performing microwave heating treatment to obtain a tampon body; S4, inserting the tampon body of the tampon into the catheter to obtain a leakage-proof tampon.

2. The method for preparing the leakage-proof tampon according to claim 1, characterized in that: The water-absorbing and leak-proof coating comprises a water-absorbing coating and a waterproof coating.

3. The method for preparing the anti-leakage tampon according to claim 2, characterized in that: The preparation method of the water-absorbing coating comprises the following steps: Add distilled water to a reaction container filled with cassava starch, then heat it up, gelatinize it, then cool it down, then add ammonium persulfate, add dropwise acrylamide, sodium p-toluenesulfonate and N,N-methylenebisacrylamide mixed solution after stirring, add diatomaceous earth at the same time, continue stirring the polymerization reaction, filter and wash to obtain a water-absorbing material; apply the water-absorbing material to the surface of a cotton thread, and then dry to obtain a water-absorbing coating.

4. The method for preparing the leakage-proof tampon according to claim 3, characterized in that: The heating temperature is 70-90°C, the gelatinization time is 25-35 minutes, the cooling temperature is 55-65°C, the polymerization time is 2.5-3.5 hours, and the drying temperature is 55-65°C.

5. The method for preparing the leakage-proof tampon according to claim 3, characterized in that: The usage ratio of cassava starch, acrylamide, sodium p-toluenesulfonate, N,N-methylenebisacrylamide and diatomaceous earth is (4-6 g): (3-5 mL): (0.8-1.2 mL): (0.4-0.6 mL): (0.01-0.05 g).

6. The method for preparing the anti-leakage tampon according to claim 2, characterized in that: The preparation method of the waterproof coating comprises the following steps: Add sodium hydroxide solution to silicon tetrachloride, stir to react, then add methyltrimethoxysilane, heat to react, then wash and dry to obtain hydrophobic nano-silica; add tetrahydrofuran and N,N-dimethylformamide mixed solvent to a reaction container filled with thermoplastic polyurethane, then add the hydrophobic nano-silica, add N,N-dimethylformamide, ultrasonically disperse, and obtain a waterproof material; spray the waterproof material on the surface of the water-absorbing coating, dry, and obtain a waterproof coating.

7. The method for preparing the leakage-proof tampon according to claim 6, characterized in that: The temperature of the heating reaction is 90-110°C.

8. The method for preparing the leakage-proof tampon according to claim 6, characterized in that: The volume ratio of silicon tetrachloride to methyltrimethoxysilane is 2-8:

1.

9. The method for preparing the leakage-proof tampon according to claim 6, characterized in that: The usage ratio of the thermoplastic polyurethane, tetrahydrofuran, N,N-dimethylformamide and hydrophobic nano-silicon dioxide is (12-16 mL): (0.2-0.3 mL): (0.5-0.8 mL): (0.2-1 mg).

10. The method for preparing the leakage-proof tampon according to claim 1, characterized in that: In step S2, the weight of the strip fiber layer is 300-900 g / m 2 .

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