Dry smooth wrapping cloth tampon and preparation method thereof

Abstract

The invention discloses a dry-state smooth wrapping cloth tampon and a preparation method thereof. The preparation method comprises the following steps that S1, cotton fibers are carded, laid, overlapped, shaped and cut to obtain a cotton fiber layer; s2, wrapping the cotton fiber layer with modified smooth cotton fibers, pressing to obtain a strip-shaped fiber layer, and fixing cotton threads at the center of the strip-shaped fiber layer to obtain a strip-shaped fiber layer with the cotton threads; s3, the strip-shaped fiber layer with the cotton threads is curled to form a long-strip cylindrical absorber, compression molding and microwave heating treatment are conducted, and a tampon body of the tampon is obtained; and S4, loading into a guide pipe to obtain the dry-state smooth wrapping cloth tampon. After the non-woven fabric is modified, the problem that the non-woven fabric is adhered to the inner wall of the vagina even if the non-woven fabric does not absorb menstrual blood or a small amount of menstrual blood is absorbed, so that the non-woven fabric is separated from the inner wall of the vagina when the tampon is taken out to cause discomfort due to tearing feeling is solved, and the problem that a traditional tampon is uncomfortable in use due to the rough surface is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, and in particular to a dry smooth wrapped cloth tampon and a preparation method thereof. Background Art

[0002] Tampons, also known as sanitary plugs, are cotton cylinders made primarily of cotton, synthetic fibers, or a mixture of these two materials. They come in sizes ranging from 1 cm to 1.9 cm in diameter, with a cotton thread (drawstring) attached to the end. During menstruation, they can be inserted into the vagina to absorb menstrual blood. In the current market, blends of cotton and synthetic fibers have become the mainstream, with absorption performance and structural stability being enhanced through processes such as non-woven fabrics and spunlace fabrics. Some products incorporate materials such as sodium alginate and super absorbent resin (SAP) to enhance water retention and reduce the risk of leakage. Furthermore, the application of degradable materials has also become a research hotspot, such as natural materials like bamboo fiber and corn fiber, which further optimize the skin-friendliness of the product while enhancing its environmental attributes.

[0003] Although tampons have made significant progress in absorption performance and environmental friendliness, there are still technical bottlenecks in the user experience. Especially in the surface treatment process, the fiber surface of traditional tampons is rough, and even if blending or coating technology is used, it is difficult to completely eliminate friction with the vaginal wall. When the finger-inserted tampon comes into direct contact with the skin, the rough surface can easily cause discomfort; during the pushing process of the catheter-type tampon, if the coating is uneven or the lubrication fails after encountering menstrual blood, it will also cause difficulty in insertion or adhesion when removed. This problem of an insufficiently smooth surface not only affects the comfort of use during menstruation, but may also increase the risk of micro-injury to the private parts, becoming a key technical issue that needs to be solved urgently. Summary of the Invention

[0004] The main purpose of the present invention is to provide a dry smooth wrapped cloth tampon and a preparation method thereof, aiming to solve the problem that the existing tampon has a not smooth surface and poor comfort.

[0005] To achieve the above objectives, the present invention provides a method for preparing a dry smooth wrapped cloth tampon, comprising the following steps:

[0006] S1, combing 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 modified smooth cotton fibers and pressing to obtain a strip-shaped fiber layer, and then fixing a cotton thread to the center of the strip-shaped fiber layer, with the tail end of the cotton thread exposed 10 to 20 cm outside the strip-shaped fiber layer, to obtain a strip-shaped fiber layer with cotton thread;

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

[0009] S4, inserting the cotton strip of the tampon into the conduit to obtain a dry smooth wrapped tampon. Preferably, in step S2, the preparation method of the modified smooth cotton fiber comprises the following steps:

[0010] S21, placing the cotton fiber in a citric acid solution to activate it for a period of time, then mixing the activated cotton fiber, arginine and deionized water, stirring, and simultaneously adding carbodiimide and N-hydroxysuccinimide, reacting for a period of time, washing, and drying to obtain a grafted cotton fiber;

[0011] S22, dissolving chitosan in an acetic acid aqueous solution, stirring to obtain a chitosan solution, adding tea polyphenols, aloe polysaccharide and β-cyclodextrin, stirring to obtain an antibacterial solution, immersing the grafted cotton fiber in the antibacterial solution for a period of time, washing, and drying to obtain an antibacterial cotton fiber;

[0012] S23. Mix natural sericin with deionized water, then add sodium alginate and glycerol, and stir to obtain a second mixed solution. Immerse the antibacterial cotton fiber in the second mixed solution, add calcium chloride, and soak for a period of time under heating. During this period, gently stir once every 20 to 30 minutes, and then wash and dry to obtain modified smooth cotton fiber.

[0013] Preferably, in step S21, the concentration of the citric acid solution is 0.1-1 mol / L; the mass ratio of the cotton fiber, arginine, carbodiimide and N-hydroxysuccinimide is (8-12):(1-3):(0.5-1):(0.5-1).

[0014] Preferably, in step S22, the mass concentration of the acetic acid aqueous solution is 0.08-0.12%;

[0015] The usage ratio of the chitosan, acetic acid aqueous solution, tea polyphenols, aloe polysaccharide and beta-cyclodextrin is (1-2g): (120-180mL): (0.5-1g): (0.2-0.4g): (0.1-0.3g).

[0016] Preferably, in step S23, the usage ratio of the natural sericin, deionized water, sodium alginate, calcium chloride and glycerol is (2-4 g): (80-120 mL): (1-3 g): (0.008-0.012 g): (0.004-0.006 g).

[0017] Preferably, in step S23, the heating temperature is 32-38° C., and the soaking time is 100-150 minutes.

[0018] Preferably, in step S1, the weight of the cotton fiber layer is 250 to 850 g / m 2 .

[0019] Preferably, in step S2, the mass ratio of the cotton fiber layer to the modified smooth cotton fiber is (10-12): (4-5).

[0020] Preferably, in step S3, the temperature of the microwave heating is 55-65° C., and the time of the microwave heating is 3-8 s.

[0021] The present invention also provides a dry smooth wrapped cloth tampon prepared by the above method.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) In the technical solution provided by the present invention, a dry smooth wrapped cloth tampon is prepared by using natural or bio-based raw materials such as citric acid, arginine, sericin, chitosan, tea polyphenols, and cotton fiber, avoiding the use of toxic and harmful chemical reagents. The production process is green and safe, reducing pollution to the environment, and showing significant advantages in terms of surface smoothness, absorption performance, antibacterial properties and safety. After the non-woven fabric layer on the surface is modified, it can solve the problem that even if no menstrual blood is absorbed or a small amount of menstrual blood is absorbed, the non-woven fabric will not adhere to the inner wall of the vagina, resulting in a tearing sensation when the non-woven fabric is removed from the inner wall of the vagina, causing discomfort. This not only effectively solves the problem of discomfort caused by the rough surface of traditional tampons, but also gives the product multiple functionalities, providing women with a better user experience during menstruation.

[0024] (2) In the preparation process of the modified smooth cotton fiber of the present invention, citric acid is first used to activate the surface of the cotton fiber, and then a grafting reaction is carried out with arginine under the action of EDC and NHS to introduce guanidine and amino groups, thereby improving the water absorption of the cotton fiber and increasing the reaction sites, providing a basis for subsequent reactions; then tea polyphenols, aloe polysaccharides and β-cyclodextrin are added to the chitosan solution to form an antibacterial liquid, and after the grafted cotton fiber is immersed in the antibacterial liquid, the chitosan molecules are attached to the surface of the cotton fiber through adsorption, diffusion and the like. The positively charged characteristic of the chitosan molecules can interact with the negative charge on the surface of the bacterial cell membrane, destroying the integrity of the bacterial cell membrane, thereby playing an antibacterial role. Tea polyphenols have strong antioxidant and antibacterial activity and can inhibit the growth of a variety of bacteria. Aloe polysaccharide has excellent moisturizing and skin care effects. It can protect women's more sensitive private skin during menstruation and reduce skin discomfort caused by friction and menstrual blood stimulation. β-cyclodextrin can encapsulate tea polyphenols, delay their release, and prolong the antibacterial effect. At the same time, the improved water-absorbent cotton fiber is more conducive to the absorption of antibacterial liquids. Finally, natural sericin itself has good lubricity and flexibility, and can form a lubricating film on the surface of cotton fibers. Sodium alginate undergoes a cross-linking reaction under the action of calcium chloride to form an elastic gel network structure. Glycerol acts as a plasticizer to increase the flexibility and lubricity of the gel network. The three work synergistically to significantly reduce the friction coefficient of the cotton fiber surface, making the tampon surface smoother and reducing discomfort during use. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a flow chart of the preparation method of the dry smooth wrapped cloth tampon provided by the present invention.

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

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. If specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. If the reagents or instruments used are not specified by the manufacturer, they are all conventional products that can be purchased commercially. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is mutually 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 this field without making creative work are within the scope of protection of the present invention.

[0029] The technical solutions of the present invention are 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] Example 1

[0031] A method for preparing a dry smooth wrapped cloth tampon comprises the following steps:

[0032] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. The single layer of cotton fibers is then stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m 2 ;

[0033] (2) Wrapping the cotton fiber layer with modified smooth cotton fiber, the weight of the modified smooth cotton fiber is 250g / m 2 After pressing, a strip fiber layer is obtained, and then a cotton thread is fixed to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0034] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then performing microwave heating at a temperature of 60° C. for 5 seconds to obtain a tampon body;

[0035] (4) inserting the tampon body into the catheter to obtain a dry, smooth wrapped tampon;

[0036] The preparation method of the modified smooth cotton fiber comprises the following steps:

[0037] 200g cotton fiber was placed in 0.5mol / L citric acid solution for activation for 50min, then the activated cotton fiber, 40g arginine and 500mL deionized water were mixed and stirred, and 10g carbodiimide and 10g N-hydroxysuccinimide, react for 4 hours, wash and dry to obtain grafted cotton fiber; dissolve 15g chitosan in 1500mL acetic acid aqueous solution, stir to obtain chitosan solution, add 8g tea polyphenols, 3g aloe polysaccharide and 2g β-cyclodextrin, stir to obtain antibacterial liquid, immerse the grafted cotton fiber in the antibacterial liquid, soak for a period of time, wash and dry to obtain antibacterial cotton fiber; mix 30g natural sericin with 1L deionized water, then add 20g sodium alginate and 0.05g glycerol, stir to obtain a second mixed solution, immerse the antibacterial cotton fiber in the second mixed solution, add 0.1g calcium chloride, soak at 35°C for 120min, gently stir every 25 minutes, then wash and dry to obtain modified smooth cotton fiber.

[0038] Example 2

[0039] A method for preparing a dry smooth wrapped cloth tampon comprises the following steps:

[0040] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. Then, the single layer of cotton fibers is stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m 2 ;

[0041] (2) Wrapping the cotton fiber layer with modified smooth cotton fiber, the weight of the modified smooth cotton fiber is 200g / m 2 After pressing, a strip fiber layer is obtained, and then a cotton thread is fixed to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0042] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then subjecting the strip to microwave heating at a temperature of 55° C. for 8 seconds to obtain a tampon body;

[0043] (4) inserting the tampon body into the catheter to obtain a dry, smooth wrapped tampon;

[0044] The preparation method of the modified smooth cotton fiber comprises the following steps:

[0045] 200 g of cotton fiber was activated in a 0.5 mol / L citric acid solution for 50 min, and then the activated cotton fiber, 20 g of arginine and 500 mL of deionized water were mixed and stirred. 10 g of carbodiimide and 10 g of N-hydroxysuccinimide were added at the same time, and the reaction was carried out for 4 h. The mixture was washed and dried to obtain grafted cotton fiber. 10 g of chitosan was dissolved in 1500 mL of acetic acid aqueous solution and stirred to obtain a chitosan solution. 5 g of tea polyphenols, 2 g of aloe polysaccharide and 1 g of β-cyclodextrin were added and stirred. , obtain an antibacterial liquid, immerse the grafted cotton fiber in the antibacterial liquid, soak for a period of time, wash, and dry to obtain antibacterial cotton fiber; mix 40g of natural sericin with 1L of deionized water, then add 10g of sodium alginate and 0.04g of glycerol, stir to obtain a second mixed liquid, immerse the antibacterial cotton fiber in the second mixed liquid, add 0.08g of calcium chloride, soak at 32°C for 150min, gently stir every 20 minutes, then wash and dry to obtain modified smooth cotton fiber.

[0046] Example 3

[0047] A method for preparing a dry smooth wrapped cloth tampon comprises the following steps:

[0048] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. Then, the single layer of cotton fibers is stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m 2 ;

[0049] (2) Wrapping the cotton fiber layer with modified smooth cotton fiber, the weight of the modified smooth cotton fiber is 180g / m 2 After pressing, a strip fiber layer is obtained, and then a cotton thread is fixed to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0050] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then subjecting the strip to microwave heating at a temperature of 65° C. for 3 seconds to obtain a tampon body;

[0051] (4) inserting the tampon body into the catheter to obtain a dry, smooth wrapped tampon;

[0052] The preparation method of the modified smooth cotton fiber comprises the following steps:

[0053] 200 g of cotton fiber was activated in a 0.5 mol / L citric acid solution for 50 min, and then the activated cotton fiber, 60 g of arginine and 500 mL of deionized water were mixed and stirred. 10 g of carbodiimide and 10 g of N-hydroxysuccinimide were added at the same time, and the reaction was continued for 4 h. The mixture was washed and dried to obtain grafted cotton fiber. 20 g of chitosan was dissolved in 1500 mL of acetic acid aqueous solution and stirred to obtain a chitosan solution. 10 g of tea polyphenols, 4 g of aloe polysaccharide and 3 g of β-cyclodextrin were added and stirred. , obtain an antibacterial liquid, immerse the grafted cotton fiber in the antibacterial liquid, soak for 40 minutes, wash, and dry to obtain antibacterial cotton fiber; mix 40g of natural sericin with 1L of deionized water, then add 30g of sodium alginate and 0.06g of glycerol, stir to obtain a second mixed liquid, immerse the antibacterial cotton fiber in the second mixed liquid, add 0.12g of calcium chloride, and soak at 38°C for 100 minutes, gently stirring every 30 minutes, and then washing and drying to obtain modified smooth cotton fiber.

[0054] Comparative Example 1

[0055] A method for preparing a tampon comprises the following steps:

[0056] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. Then, the single layer of cotton fibers is stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m 2 ;

[0057] (2) wrapping the cotton fiber layer with ordinary cotton fibers and pressing to obtain a strip fiber layer, and then fixing a cotton thread to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0058] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then performing microwave heating at a temperature of 60° C. for 5 seconds to obtain a tampon body;

[0059] (4) The tampon body of the tampon is placed into a catheter to obtain the tampon.

[0060] Compared with Example 1, step (2) of Comparative Example 1 did not use modified smooth cotton fiber for wrapping.

[0061] Comparative Example 2

[0062] A method for preparing a tampon comprises the following steps:

[0063] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. Then, the single layer of cotton fibers is stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m 2 ;

[0064] (2) Wrapping the cotton fiber layer with modified smooth cotton fiber, the weight of the modified smooth cotton fiber is 250g / m 2 After pressing, a strip fiber layer is obtained, and then a cotton thread is fixed to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0065] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then performing microwave heating at a temperature of 60° C. for 5 seconds to obtain a tampon body;

[0066] (4) inserting the tampon body of the tampon into a catheter to obtain the tampon;

[0067] The preparation method of the modified smooth cotton fiber comprises the following steps:

[0068] 200g cotton fiber was placed in 0.5mol / L citric acid solution for activation for 50min, then the activated cotton fiber was mixed with 500mL deionized water and stirred, and 10g carbodiimide and 10g N-hydroxysuccinimide, react for 4 hours, wash and dry to obtain grafted cotton fiber; dissolve 15g chitosan in 1500mL acetic acid aqueous solution, stir to obtain chitosan solution, add 8g tea polyphenols, 3g aloe polysaccharide and 2g β-cyclodextrin, stir to obtain antibacterial liquid, immerse the grafted cotton fiber in the antibacterial liquid, soak for a period of time, wash and dry to obtain antibacterial cotton fiber; mix 30g natural sericin with 1L deionized water, then add 20g sodium alginate and 0.05g glycerol, stir to obtain a second mixed solution, immerse the antibacterial cotton fiber in the second mixed solution, add 0.1g calcium chloride, soak at 35°C for 120min, gently stir every 25 minutes, then wash and dry to obtain modified smooth cotton fiber.

[0069] Compared with Example 1, the cotton fiber of Comparative Example 2 was not grafted with arginine.

[0070] Comparative Example 3

[0071] A method for preparing a tampon comprises the following steps:

[0072] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. Then, the single layer of cotton fibers is stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m2 ;

[0073] (2) Wrapping the cotton fiber layer with modified smooth cotton fiber, the weight of the modified smooth cotton fiber is 250g / m 2 After pressing, a strip fiber layer is obtained, and then a cotton thread is fixed to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0074] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then performing microwave heating at a temperature of 60° C. for 5 seconds to obtain a tampon body;

[0075] (4) inserting the tampon body of the tampon into a catheter to obtain the tampon;

[0076] The preparation method of the modified smooth cotton fiber comprises the following steps:

[0077] 200g of cotton fiber was activated in a 0.5mol / L citric acid solution for 50min, and then the activated cotton fiber, 40g of arginine and 500mL of deionized water were mixed and stirred. At the same time, 10g of carbodiimide and 10g of N-hydroxysuccinimide were added, the reaction was carried out for 4h, and the mixture was washed and dried to obtain grafted cotton fiber; 8g of tea polyphenols, 3g of aloe polysaccharide and 2g of β-cyclodextrin were added to 1500mL of acetic acid aqueous solution, stirred to obtain an antibacterial solution, and the grafted cotton fiber was immersed in the antibacterial solution for a period of time, washed and dried to obtain antibacterial cotton fiber; 30g of natural sericin was mixed with 1L of deionized water, and then 20g of sodium alginate and 0.05g of glycerol were added and stirred to obtain a second mixed solution, and the antibacterial cotton fiber was immersed in the second mixed solution, 0.1g of calcium chloride was added, and the mixture was heated at 35°C and soaked for 120min, gently stirred every 25 minutes, and then washed and dried to obtain modified smooth cotton fiber.

[0078] Compared with Example 1, chitosan was not added to the antibacterial liquid of Comparative Example 3.

[0079] Comparative Example 4

[0080] A method for preparing a tampon comprises the following steps:

[0081] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. The single layer of cotton fibers is then stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m 2 ;

[0082] (2) Wrapping the cotton fiber layer with modified smooth cotton fiber, the weight of the modified smooth cotton fiber is 250g / m2 After pressing, a strip fiber layer is obtained, and then a cotton thread is fixed to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0083] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then performing microwave heating at a temperature of 60° C. for 5 seconds to obtain a tampon body;

[0084] (4) inserting the tampon body of the tampon into a catheter to obtain the tampon;

[0085] The preparation method of the modified smooth cotton fiber comprises the following steps:

[0086] 200g cotton fiber was placed in 0.5mol / L citric acid solution for activation for 50min, then the activated cotton fiber, 40g arginine and 500mL deionized water were mixed and stirred, and 10g carbodiimide and 10g N-hydroxysuccinimide, react for 4 hours, wash and dry to obtain grafted cotton fiber; dissolve 15g chitosan in 1500mL acetic acid aqueous solution, stir to obtain chitosan solution, add 8g tea polyphenols and 3g aloe polysaccharide, stir to obtain antibacterial liquid, immerse the grafted cotton fiber in the antibacterial liquid, soak for a period of time, wash and dry to obtain antibacterial cotton fiber; mix 30g natural sericin with 1L deionized water, then add 20g sodium alginate and 0.05g glycerol, stir to obtain a second mixed solution, immerse the antibacterial cotton fiber in the second mixed solution, add 0.1g calcium chloride, soak at 35°C for 120min, gently stir every 25 minutes, then wash and dry to obtain modified smooth cotton fiber.

[0087] Compared with Example 1, the antibacterial liquid of Comparative Example 4 does not contain β-cyclodextrin.

[0088] Comparative Example 5

[0089] A method for preparing a tampon comprises the following steps:

[0090] (1) Combing the cotton fibers, and then laying them into a single layer of cotton fibers. Then, the single layer of cotton fibers is stacked, shaped, and cut to obtain a cotton fiber layer. The weight of the cotton fiber layer is 500 g / m 2 ;

[0091] (2) Wrapping the cotton fiber layer with modified smooth cotton fiber, the weight of the modified smooth cotton fiber is 250g / m 2After pressing, a strip fiber layer is obtained, and then a cotton thread is fixed to the center of the strip fiber layer, with the tail end of the cotton thread exposed 15 cm outside the strip fiber layer, to obtain a strip fiber layer with cotton thread;

[0092] (3) curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and molding the strip in a former, and then performing microwave heating at a temperature of 60° C. for 5 seconds to obtain a tampon body;

[0093] (4) inserting the tampon body of the tampon into a catheter to obtain the tampon;

[0094] The preparation method of the modified smooth cotton fiber comprises the following steps:

[0095] 200 g of cotton fiber was activated in a 0.5 mol / L citric acid solution for 50 min, and then the activated cotton fiber, 40 g of arginine and 500 mL of deionized water were mixed and stirred, and 10 g of carbodiimide and 10 g of N-hydroxysuccinimide were added at the same time. The mixture was reacted for 4 h, washed and dried to obtain grafted cotton fiber; 15 g of chitosan was dissolved in 1500 mL of acetic acid aqueous solution and stirred to obtain chitosan solution, and 8 g of tea polyphenols, 3 g of aloe polysaccharide and 2 g of β-cyclodextrin, stirred to obtain an antibacterial liquid, immersed the grafted cotton fiber in the antibacterial liquid, soaked for a period of time, washed, and dried to obtain antibacterial cotton fiber; 20g of sodium alginate and 0.05g of glycerol were added to 1L of deionized water, stirred to obtain a second mixed liquid, immersed the antibacterial cotton fiber in the second mixed liquid, added 0.1g of calcium chloride, heated at 35°C and soaked for 120min, gently stirred every 25 minutes, and then washed and dried to obtain modified smooth cotton fiber.

[0096] Compared with Example 1, the cotton fiber of Comparative Example 5 is not grafted with sericin.

[0097] Test methods and results

[0098] The tampons prepared in Examples 1 to 3 and Comparative Examples 1 to 5 were randomly selected, with 20 tampons in each group. The push-out force of any 10 tampons after preparation was tested, the average push-out force was calculated, and the absorption capacity was tested. The test results are shown in Table 1 below.

[0099] Table 1 Statistical results of the pushing force and absorption capacity of tampons

[0100]

[0101]

[0102] The antibacterial rate of the tampons prepared in Examples 1 to 3 of the present invention and Comparative Examples 1 to 5 was tested. At the same time, commercially available ordinary tampons were used as a blank control group, and the antibacterial rate tests of the prepared tampon samples were performed on Escherichia coli, Staphylococcus aureus, Candida albicans, Pseudomonas aeruginosa, and beta-hemolytic Streptococcus. The results are shown in Table 2.

[0103] Table 2 Antibacterial rate test results

[0104]

[0105] It can be seen from the results in Table 1 above that, compared with Comparative Examples 1 to 5, the tampons prepared in Examples 1 to 3 of the present invention have smaller pushing force, smaller friction, smoother surface, better comfort, and higher water absorption; it can be seen from Table 2 above that the tampons prepared in the present invention have good antibacterial effect.

[0106] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of the present invention.

Claims

1. A method for preparing a dry smooth wrapped cloth tampon, characterized in that: The following steps are involved: S1, combing 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 modified smooth cotton fibers and pressing to obtain a strip-shaped fiber layer, and then fixing a cotton thread to the center of the strip-shaped fiber layer, with the tail end of the cotton thread exposed 10 to 20 cm outside the strip-shaped fiber layer, to obtain a strip-shaped fiber layer with cotton thread; S3, curling the strip-shaped fiber layer with cotton thread to form a long cylindrical absorbent body, pressing and forming it in a former, and then performing microwave heating treatment to obtain a tampon body; S4. The tampon body of the tampon is placed into a catheter to obtain a dry, smooth wrapped tampon.

2. The method for preparing a dry smooth wrapped cloth tampon according to claim 1, characterized in that: In step S2, the method for preparing the modified smooth cotton fiber comprises the following steps: S21, placing the cotton fiber in a citric acid solution to activate it for a period of time, then mixing the activated cotton fiber, arginine and deionized water, stirring, and simultaneously adding carbodiimide and N-hydroxysuccinimide, reacting for a period of time, washing, and drying to obtain a grafted cotton fiber; S22, dissolving chitosan in an acetic acid aqueous solution, stirring to obtain a chitosan solution, adding tea polyphenols, aloe polysaccharide and β-cyclodextrin, stirring to obtain an antibacterial solution, immersing the grafted cotton fiber in the antibacterial solution for a period of time, washing, and drying to obtain an antibacterial cotton fiber; S23. Mix natural sericin with deionized water, then add sodium alginate and glycerol, and stir to obtain a second mixed solution. Immerse the antibacterial cotton fiber in the second mixed solution, add calcium chloride, and soak for a period of time under heating. During this period, gently stir once every 20 to 30 minutes, and then wash and dry to obtain modified smooth cotton fiber.

3. The method for preparing a dry smooth wrapped cloth tampon according to claim 2, characterized in that: In step S21, the concentration of the citric acid solution is 0.1-1 mol / L; the mass ratio of the cotton fiber, arginine, carbodiimide and N-hydroxysuccinimide is (8-12):(1-3):(0.5-1):(0.5-1).

4. The method for preparing a dry smooth wrapped cloth tampon according to claim 2, wherein: In step S22, the mass concentration of the acetic acid aqueous solution is 0.08-0.12%; The usage ratio of the chitosan, acetic acid aqueous solution, tea polyphenols, aloe polysaccharide and beta-cyclodextrin is (1-2g): (120-180mL): (0.5-1g): (0.2-0.4g): (0.1-0.3g).

5. The method for preparing a dry smooth wrapped cloth tampon according to claim 2, wherein: In step S23 , the usage ratio of the natural sericin, deionized water, sodium alginate, calcium chloride and glycerol is (2-4 g): (80-120 mL): (1-3 g): (0.008-0.012 g): (0.004-0.006 g).

6. The method for preparing a dry smooth wrapped cloth tampon according to claim 2, wherein: In step S23, the temperature is heated to 32-38°C, and the soaking time is 100-150 minutes.

7. The method for preparing a dry smooth wrapped cloth tampon according to claim 1, wherein: In step S1, the weight of the cotton fiber layer is 250-850 g / m 2 .

8. The method for preparing a dry smooth wrapped cloth tampon according to claim 1, wherein: In step S2, the mass ratio of the cotton fiber layer to the modified smooth cotton fiber is (10-12): (4-5).

9. The method for preparing a dry smooth wrapped cloth tampon according to claim 1, wherein: In step S3, the temperature of the microwave heating is 55-65° C., and the time of the microwave heating is 3-8 seconds.

10. A dry smooth wrapped cloth tampon prepared by the method according to any one of claims 1 to 9.

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