Tampon using sponge as core body and preparation method of tampon
By using sponge as the core and adding functional cotton fibers, the problem of insufficient absorption and maintaining menstrual blood is solved, and more efficient blood-sucking and antibacterial properties are achieved, reducing the risk of spillover and vaginal infection.
Patent Information
- Application Number
- CN202411549462.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-02-07
AI Technical Summary
Existing tampons have limited ability to absorb and maintain menstrual blood, which can easily lead to spillover, and long-term use may lead to vaginal infection.
Use sponge as the core, and functional cotton fibers are added during the preparation of the sponge core, through plasma treatment, epoxychlorohydrin and ethylenediamine reaction, addition of chitosan-modified montmorillonite and guar gum The electrostatic adsorption and chemical bonding of hydroxypropyl trimethyl ammonium chloride improve the blood-sucking, antibacterial and water-retaining properties of the sponge core.
The porosity and hydrophilicity of the sponge core significantly improve the ability to absorb and retain menstrual blood, avoid spillover, and reduce the risk of vaginal infection by enhancing antibacterial properties.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of sanitary products, and in particular to a tampon using a sponge as a core and a preparation method thereof. Background Art
[0002] Tampons, also known as sanitary plugs, are a kind of cotton cylinder, mainly made of cotton, man-made fiber or a mixture of these two materials, with diameters ranging from 1 cm to 1.9 cm, and a cotton thread attached to the end. The convenience of tampons meets the new needs of consumers. Compared with sanitary napkins, women can dress, move, work, exercise, relax, play, etc. freely when using tampons, without suffering from leakage and worry. They are gradually being accepted by domestic consumers, especially young people. When women have their menstrual period, tampons are inserted into the vagina. They have the effect of strongly absorbing menstrual blood. They have attracted much attention because of their small size, comfortable use, and good absorption capacity.
[0003] Most tampons on the market are made of cotton, synthetic fibers, or a mixture of these two materials. They have limited ability to absorb menstrual blood, which can easily lead to overflow. In addition, tampons are kept in the hot and humid environment of the vagina for a long time. If they are not replaced in time, they can easily breed bacteria and cause vaginal infection. Summary of the invention
[0004] The main purpose of the present invention is to propose a tampon using a sponge as a core body. The sponge is used as the core body. The porosity and hydrophilicity of the sponge can absorb and retain a large amount of menstrual blood to avoid overflow. By adding functional cotton fibers during the preparation of the sponge core body, the skin-friendliness, antibacterial properties and menstrual blood absorption performance of the tampon can be improved, thereby preventing the tampon from breeding bacteria during long-term use and causing vaginal infection and menstrual blood overflow.
[0005] To achieve the above object, the present invention provides a tampon using a sponge as a core, and a preparation method thereof comprises the following steps:
[0006] The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 10-20 cm outside the sponge core, and then the sponge core is curled to form a long cylindrical absorbent body, which is pressed and formed in a former and then subjected to microwave heating treatment to obtain a tampon body; finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
[0007] Preferably, the weight of the sponge core is 500-900 g / m 2The sponge core comprises the following components in parts by weight: 30-50 parts of polyisocyanate, 90-100 parts of polyol, 15-20 parts of functionalized cotton fiber, 1.5-2.5 parts of water, 0.6-1.2 parts of silicone oil and 0.3-0.5 parts of catalyst.
[0008] Preferably, the polyisocyanate is at least one of toluene diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate.
[0009] Preferably, the polyol is at least one of polylactic acid polyol, poly(lactide-glycol) polyol, polyethylene glycol, polypropylene glycol, polyglycerol, and ethylene glycol-propylene glycol copolymer polyol.
[0010] Preferably, the preparation method of the functionalized cotton fiber is as follows:
[0011] (1) dispersing cotton fibers treated with plasma in water, adding epichlorohydrin and ethylenediamine thereto, heating and stirring to react, and after the reaction is completed, filtering, washing, and drying the reaction product to obtain ethylenediamine-modified cotton fibers;
[0012] (2) dispersing montmorillonite in an aqueous solution of sodium dodecyl sulfate, adding an aqueous solution of NaOH, adding carboxymethyl chitosan, and heating for reaction; after the reaction is completed, cooling, filtering, washing until the pH value of the filtrate is neutral, and then drying to obtain chitosan-modified montmorillonite;
[0013] (3) Dispersing ethylenediamine-modified cotton fibers in an ethanol aqueous solution, adding chitosan-modified montmorillonite and epichlorohydrin, stirring and mixing, adding an aqueous NaOH solution, heating and stirring to react for 3-5 hours, then adding guar gum hydroxypropyltrimethylammonium chloride, continuing to keep warm and react for 2-4 hours, cooling, filtering, collecting solids, and washing and drying the solids to obtain functionalized cotton fibers.
[0014] Preferably, in step (1), the mass ratio of cotton fiber, epichlorohydrin and ethylenediamine is 10-20:2-3:3-5.
[0015] Preferably, in step (2), the mass ratio of montmorillonite to carboxymethyl chitosan is 1-2:1.
[0016] Preferably, in step (3), the mass ratio of ethylenediamine-modified cotton fiber, chitosan-modified montmorillonite, epichlorohydrin, and guar gum hydroxypropyltrimethylammonium chloride is 5-10:4-6:10-15:6-8.
[0017] Preferably, the silicone oil is polyether-modified silicone oil.
[0018] Preferably, the catalyst is at least one of stannous octoate and dibutyltin dilaurate.
[0019] Further preferably, the preparation method of the sponge core is as follows:
[0020] S1: adding functionalized cotton fiber to polyol, stirring and dispersing it fully, then adding silicone oil and water in sequence, stirring and dispersing them at room temperature to form a uniform mixed solution;
[0021] S2: adding polyisocyanate to the mixed solution obtained in step S1, dispersing it evenly at room temperature, adding a catalyst, transferring it into a mold at 50-60° C., molding it in the mold for 5-10 minutes, and demolding it to obtain a sponge core.
[0022] Preferably, the microwave heating temperature is 50-65° C., and the microwave heating time is 2-8 s.
[0023] The tampon of the present invention uses a sponge as a core body. The sponge has porosity and hydrophilicity, and can absorb and retain menstrual blood in large quantities to avoid overflow. Functionalized cotton fibers are added during the preparation of the sponge core body, so that the performance of the tampon in absorbing and retaining menstrual blood can be further improved. The preparation of the functionalized cotton fibers first involves introducing ethylenediamine onto the cotton fibers, which can provide active amino groups for subsequent reactions. Then, carboxymethyl chitosan is introduced onto montmorillonite with water-retaining and antibacterial properties. The chitosan-modified montmorillonite is introduced into the ethylenediamine-modified cotton fibers. The chitosan-modified montmorillonite and the ethylenediamine-modified cotton fibers are cross-linked, which is beneficial to improving the mechanical properties of the sponge core body. Finally, guar gum hydroxypropyltrimethylammonium chloride is attached to the cotton fibers through electrostatic adsorption and chemical bonds, so that the antibacterial, blood-absorbing and water-retaining properties of the sponge core body are further improved.
[0024] Compared with the prior art, the present invention has the following beneficial effects:
[0025] (1) The present invention provides a method for preparing a tampon using a sponge as a core body, which is prepared by using a sponge as a core body, fixing a sewing thread, and curling and compressing the sponge into a catheter; using a sponge as a core body, the sponge has a porous and hydrophilic nature, and can absorb and retain a large amount of menstrual blood to prevent overflow;
[0026] (2) The sponge core of the present invention uses highly active polyisocyanate and polypropylene glycol as main materials, and the prepared sponge has good open porosity, and its softness and load-bearing performance are also enhanced to a certain extent. By adding functionalized cotton fibers, the antibacterial property, blood absorption and water retention properties of the sponge core are improved;
[0027] (3) The tampon made of the sponge prepared by the present invention as the core can prevent the tampon from being in the hot and humid environment of the vagina for a long time. If it is not replaced in time, it is easy to breed bacteria and cause vaginal infection. DETAILED DESCRIPTION
[0028] To avoid redundancy, the items used in the following examples are all commercially available products unless otherwise specified, and the methods used are all conventional methods unless otherwise specified.
[0029] The sources of some raw materials used in the present invention are as follows:
[0030] Carboxymethyl chitosan, with a degree of deacetylation of 85%, was purchased from Hubei Shineng Chemical Technology Co., Ltd.
[0031] Montmorillonite, 325 mesh, was purchased from Lingshou County Wanzhu Mineral Products Co., Ltd.
[0032] Guar hydroxypropyltrimonium chloride, transparency ≥85%, was purchased from Nanjing Aplus Chemical Co., Ltd.
[0033] Example 1
[0034] A tampon using a sponge as a core, and a preparation method thereof, comprising the following steps:
[0035] The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 15 cm outside the sponge core. The sponge core is then curled to form a long cylindrical absorbent body, which is pressed in a former and then subjected to microwave heating at 60°C for 6 seconds to obtain a tampon body. Finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
[0036] The preparation method of the sponge core is as follows:
[0037] S1: Add 18.2g of functionalized cotton fiber to 95.5g of polypropylene glycol, stir and disperse thoroughly, then add 1g of silicone polyether modified silicone oil and 2g of water in sequence, stir and disperse at room temperature to form a uniform mixed solution;
[0038] S2: Add 40g of isophorone diisocyanate to the mixed solution obtained in step S1, disperse it evenly at room temperature, add 0.4g of dibutyltin dilaurate, transfer it into a mold at 60°C, shape it in the mold for 10 minutes, and then demold it to obtain a sponge core.
[0039] The preparation method of the functionalized cotton fiber is as follows:
[0040] (1) 16.8 g of cotton fiber was dispersed in 200 mL of water after being treated with plasma. The plasma treatment process was to evacuate the plasma instrument and then introduce oxygen. The power was set to 180 W and the treatment time was 8 min. 2.6 g of epichlorohydrin and 4.4 g of ethylenediamine were added thereto. The mixture was heated and stirred at 60 ° C for 2 h. After the reaction was completed, the reaction product was filtered, washed and dried to obtain ethylenediamine-modified cotton fiber.
[0041] (2) 20 g of montmorillonite was dispersed in 200 mL of a 10 wt% sodium dodecyl sulfate aqueous solution, 1 mol / L NaOH aqueous solution was added to adjust the pH value to 10, 15 g of carboxymethyl chitosan was added, and the mixture was heated at 60° C. for 2 h. After the reaction was completed, the mixture was cooled, filtered, and washed until the pH value of the filtrate was neutral, and then dried to obtain chitosan-modified montmorillonite;
[0042] (3) Disperse 12 g of ethylenediamine-modified cotton fiber in 500 mL of 50 wt% ethanol aqueous solution, add 10 g of chitosan-modified montmorillonite and 23.8 g of epichlorohydrin, stir and mix evenly, then add 10 mL of 1 mol / L NaOH aqueous solution, heat and react at 60 ° C for 4 h, then add 14.2 g of guar gum hydroxypropyltrimethylammonium chloride, continue to keep warm and react for 3 h, cool, filter, collect solids, wash and dry the solids to obtain functionalized cotton fibers.
[0043] Example 2
[0044] A tampon using a sponge as a core, and a preparation method thereof, comprising the following steps:
[0045] The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 11 cm outside the sponge core. The sponge core is then curled to form a long cylindrical absorbent body, which is pressed in a former and then subjected to microwave heating at 50°C for 2s to obtain a tampon body. Finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
[0046] The preparation method of the sponge core is as follows:
[0047] S1: 15.3 g of functionalized cotton fiber was added to 90.2 g of polypropylene glycol, and after sufficient stirring and dispersion, 0.6 g of silicone polyether modified silicone oil and 1.5 g of water were added in sequence, and stirred and dispersed at room temperature to form a uniform mixed solution;
[0048] S2: Add 30g of isophorone diisocyanate to the mixed solution obtained in step S1, disperse it evenly at room temperature, add 0.3g of dibutyltin dilaurate, transfer it into a mold at 50°C, shape it in the mold for 5 minutes, and then demold it to obtain a sponge core.
[0049] The preparation method of the functionalized cotton fiber is as follows:
[0050] (1) 10.5 g of cotton fiber was dispersed in 200 mL of water after being treated with plasma. The plasma treatment process was to evacuate the plasma instrument and then introduce oxygen. The power was set to 180 W and the treatment time was 8 min. 2.1 g of epichlorohydrin and 3 g of ethylenediamine were added thereto. The mixture was heated and stirred at 60 ° C for 2 h. After the reaction was completed, the reaction product was filtered, washed and dried to obtain ethylenediamine-modified cotton fiber.
[0051] (2) dispersing 20 g of montmorillonite in 200 mL of a 10 wt% sodium dodecyl sulfate aqueous solution, adding a 1 mol / L NaOH aqueous solution to adjust the pH value to 10, adding 20 g of carboxymethyl chitosan, and heating at 60° C. for reaction for 2 h; after the reaction is completed, cooling, filtering, washing until the pH value of the filtrate is neutral, and then drying to obtain chitosan-modified montmorillonite;
[0052] (3) Disperse 10.2 g of ethylenediamine-modified cotton fiber in 500 mL of 50 wt% ethanol aqueous solution, add 8 g of chitosan-modified montmorillonite and 20 g of epichlorohydrin, stir and mix evenly, then add 10 mL of 1 mol / L NaOH aqueous solution, heat and react at 60 ° C for 4 h, then add 12 g of guar gum hydroxypropyltrimethylammonium chloride, continue to keep warm and react for 2 h, cool, filter, collect solids, wash and dry the solids to obtain functionalized cotton fibers.
[0053] Example 3
[0054] A tampon using a sponge as a core, and a preparation method thereof, comprising the following steps:
[0055] The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 20 cm outside the sponge core. The sponge core is then curled to form a long cylindrical absorbent body, which is pressed in a former and then subjected to microwave heating at 65°C for 4 seconds to obtain a tampon body. Finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
[0056] The preparation method of the sponge core is as follows:
[0057] S1: 20g of functionalized cotton fiber is added to 100g of polypropylene glycol, and after sufficient stirring and dispersion, 1.2g of silicone polyether modified silicone oil and 2.5g of water are added in sequence, and the mixture is stirred and dispersed at room temperature to form a uniform mixed solution;
[0058] S2: add 50g of isophorone diisocyanate to the mixed solution obtained in step S1, disperse it evenly at room temperature, add 0.5g of dibutyltin dilaurate, transfer it into a mold at 50-60°C, shape it in the mold for 5-10 minutes, and then demold it to obtain a sponge core.
[0059] The preparation method of the functionalized cotton fiber is as follows:
[0060] (1) 20 g of cotton fiber was dispersed in 200 mL of water after being treated with plasma. The plasma treatment process was to evacuate the plasma instrument and then introduce oxygen. The power was set to 180 W and the treatment time was 8 min. 3 g of epichlorohydrin and 5 g of ethylenediamine were added thereto. The mixture was heated and stirred at 60 ° C for 2 h. After the reaction was completed, the reaction product was filtered, washed and dried to obtain ethylenediamine-modified cotton fiber.
[0061] (2) dispersing 20 g of montmorillonite in 200 mL of a 10 wt% sodium dodecyl sulfate aqueous solution, adding a 1 mol / L NaOH aqueous solution to adjust the pH value to 10, adding 10 g of carboxymethyl chitosan, and heating at 60° C. for reaction for 2 h; after the reaction is completed, cooling, filtering, washing until the pH value of the filtrate is neutral, and then drying to obtain chitosan-modified montmorillonite;
[0062] (3) Disperse 20 g of ethylenediamine-modified cotton fiber in 500 mL of 50 wt% ethanol aqueous solution, add 12 g of chitosan-modified montmorillonite and 30 g of epichlorohydrin, stir and mix evenly, then add 15 mL of 1 mol / L NaOH aqueous solution, heat and react at 60 ° C for 4 h, then add 16 g of guar gum hydroxypropyltrimethylammonium chloride, continue to keep warm and react for 3 h, cool, filter, collect solids, wash and dry the solids to obtain functionalized cotton fibers.
[0063] Comparative Example 1
[0064] A tampon using a sponge as a core, the preparation method of which is similar to that of Example 1, except that no functional cotton fiber is added during the preparation of the sponge core, specifically comprising the following steps:
[0065] The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 15 cm outside the sponge core. The sponge core is then curled to form a long cylindrical absorbent body, which is pressed in a former and then subjected to microwave heating at 60°C for 6 seconds to obtain a tampon body. Finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
[0066] The preparation method of the sponge core is as follows:
[0067] S1 95.5g of polypropylene glycol, 1g of silicone oil polyether modified silicone oil and 2g of water were stirred and dispersed at room temperature to form a uniform mixed solution;
[0068] S2: Add 40g of isophorone diisocyanate to the mixed solution obtained in step S1, disperse it evenly at room temperature, add 0.4g of dibutyltin dilaurate, transfer it into a mold at 60°C, shape it in the mold for 10 minutes, and then demold it to obtain a sponge core.
[0069] Comparative Example 2
[0070] A tampon using a sponge as a core, the preparation method of which is similar to that of Example 1, except that guar gum hydroxypropyltrimethylammonium chloride is not added to the functionalized cotton fiber, and specifically comprises the following steps:
[0071] The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 15 cm outside the sponge core. The sponge core is then curled to form a long cylindrical absorbent body, which is pressed in a former and then subjected to microwave heating at 60°C for 6 seconds to obtain a tampon body. Finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
[0072] The preparation method of the sponge core is as follows:
[0073] S1: Add 18.2g of functionalized cotton fiber to 95.5g of polypropylene glycol, stir and disperse thoroughly, then add 1g of silicone polyether modified silicone oil and 2g of water in sequence, stir and disperse at room temperature to form a uniform mixed solution;
[0074] S2: Add 40g of isophorone diisocyanate to the mixed solution obtained in step S1, disperse it evenly at room temperature, add 0.4g of dibutyltin dilaurate, transfer it into a mold at 60°C, shape it in the mold for 10 minutes, and then demold it to obtain a sponge core.
[0075] The preparation method of the functionalized cotton fiber is as follows:
[0076] (1) 16.8 g of cotton fiber was dispersed in 200 mL of water after being treated with plasma. The plasma treatment process was to evacuate the plasma instrument and then introduce oxygen. The power was set to 180 W and the treatment time was 8 min. 2.6 g of epichlorohydrin and 4.4 g of ethylenediamine were added thereto. The mixture was heated and stirred at 60 ° C for 2 h. After the reaction was completed, the reaction product was filtered, washed and dried to obtain ethylenediamine-modified cotton fiber.
[0077] (2) 20 g of montmorillonite was dispersed in 200 mL of a 10 wt% sodium dodecyl sulfate aqueous solution, 1 mol / L NaOH aqueous solution was added to adjust the pH value to 10, 15 g of carboxymethyl chitosan was added, and the mixture was heated at 60° C. for 2 h. After the reaction was completed, the mixture was cooled, filtered, and washed until the pH value of the filtrate was neutral, and then dried to obtain chitosan-modified montmorillonite;
[0078] (3) Disperse 12 g of ethylenediamine-modified cotton fiber in 500 mL of 50 wt% ethanol aqueous solution, add 10 g of chitosan-modified montmorillonite and 23.8 g of epichlorohydrin, stir and mix evenly, then add 10 mL of 1 mol / L NaOH aqueous solution, heat and react at 60 ° C for 4 h, cool after the reaction, filter, collect the solid, wash and dry the solid to obtain functionalized cotton fiber.
[0079] Comparative Example 3
[0080] A tampon using a sponge as a core, the preparation method of which is similar to that of Example 1, except that diatomaceous earth and carboxymethyl chitosan are directly physically mixed in the functionalized cotton fiber, specifically comprising the following steps:
[0081] The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 15 cm outside the sponge core. The sponge core is then curled to form a long cylindrical absorbent body, which is pressed in a former and then subjected to microwave heating at 60°C for 6 seconds to obtain a tampon body. Finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
[0082] The preparation method of the sponge core is as follows:
[0083] S1: Add 18.2g of functionalized cotton fiber to 95.5g of polypropylene glycol, stir and disperse thoroughly, then add 1g of silicone polyether modified silicone oil and 2g of water in sequence, stir and disperse at room temperature to form a uniform mixed solution;
[0084] S2: Add 40g of isophorone diisocyanate to the mixed solution obtained in step S1, disperse it evenly at room temperature, add 0.4g of dibutyltin dilaurate, transfer it into a mold at 60°C, shape it in the mold for 10 minutes, and then demold it to obtain a sponge core.
[0085] The preparation method of the functionalized cotton fiber is as follows:
[0086] (1) 16.8 g of cotton fiber was dispersed in 200 mL of water after being treated with plasma. The plasma treatment process was to evacuate the plasma instrument and then introduce oxygen. The power was set to 180 W and the treatment time was 8 min. 2.6 g of epichlorohydrin and 4.4 g of ethylenediamine were added thereto. The mixture was heated and stirred at 60 ° C for 2 h. After the reaction was completed, the reaction product was filtered, washed and dried to obtain ethylenediamine-modified cotton fiber.
[0087] (2) Disperse 12 g of ethylenediamine-modified cotton fiber in 500 mL of 50 wt% ethanol aqueous solution, add 5 g of montmorillonite, 5 g of carboxymethyl chitosan, and 23.8 g of epichlorohydrin, stir and mix well, then add 10 mL of 1 mol / L NaOH aqueous solution, heat and react at 60 ° C for 4 h, then add 14.2 g of guar gum hydroxypropyltrimethylammonium chloride, continue to keep warm and react for 3 h, cool, filter, collect solids, wash and dry the solids to obtain functionalized cotton fibers.
[0088] Test Case
[0089] Antibacterial performance test of sponge core: The antibacterial performance test of the sponge core prepared in Examples 1-3 was carried out, and the detection standard was referenced to GB / T20944.3-2008; wherein, the tested bacteria were (ATCC 6538), Escherichia coli (ATCC 25922), and Candida albicans (ATCC 10231), and the action time was 3h. The test results are shown in Table 1:
[0090] Table 1 Antibacterial performance test results of sponge core
[0091]
[0092] It can be seen from the experimental results in Table 1 that the sponge core prepared by the present invention still has a good antibacterial effect after being used for 3 hours.
[0093] Water absorption performance test: weigh the mass (pre-absorption mass) of the tampons prepared in Examples 1-3 and Comparative Examples 1-3, clamp one end of the sample with a clip, and make the clip mouth perpendicular to the longitudinal direction of the sample. Immerse the sample together with the clip in distilled water at a depth of about 10 cm and a temperature of (23±1)°C, press the sample lightly to keep it completely immersed for 60 seconds, then lift the clip to make the sample completely leave the water surface, and hang it vertically for 90 seconds, then weigh its mass (post-absorption mass), and calculate the water absorption rate according to the formula K=(nm) / m, where K is the absorption rate, m is the mass before absorption, and n is the mass after absorption; the specific test results are shown in Table 2 below
[0094] Table 2 Test results of water absorption rate of tampons
[0095]
[0096]
[0097] It can be seen from the experimental results in Table 2 that, compared with Comparative Examples 1-3, the tampons prepared in Examples 1-3 of the present invention have better liquid absorption capacity.
[0098] Water retention performance test: stick the sponge core flat on the test panel, align the center position of the effective length and effective width of the sponge core with the center point of the lower opening of the drain funnel. Adjust the height of the funnel so that the lower end of its lower opening is 5-10mm away from the sample surface. Use a pipette to transfer 5ml of the test solution into the adjusted funnel, then quickly open the funnel valve to the maximum, allowing the solution to flow freely to the surface of the sponge core sample. After 4 minutes, place several layers of filter paper with a diameter of 125mm and a known mass (the top layer of filter paper has no liquid absorption as the judgment standard) on the surface of the sponge core, and put the standard pressing block on it. After 1 minute, remove the standard pressing block, weigh the mass of the filter paper with a balance, and calculate the re-seepage amount according to the formula m=m1-m2, where m is the re-seepage amount (g); m1 is the mass of the filter paper after absorption (g); m2 is the mass of the filter paper before absorption (g); this characterizes the water retention capacity of the sanitary napkin. The specific test results are shown in Table 3:
[0099] Table 3 Test results of water retention capacity of sanitary napkins
[0100] Re-seepage amount (g) Example 1 0.289 Example 2 0.312 Example 3 0.298 Comparative Example 1 0.395 Comparative Example 2 0.356 Comparative Example 3 0.338
[0101] It can be seen from the experimental results in Table 3 that the tampon prepared in the embodiment of the present invention has good water retention performance and can prevent the overflow of menstrual blood during use.
[0102] 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 tampon using a sponge as a core, characterized in that: The steps include: The sewing thread is fixed at the center of the sponge core, with the tail end of the sewing thread exposed 10-20 cm outside the sponge core, and then the sponge core is curled to form a long cylindrical absorbent body, which is pressed and formed in a former and then subjected to microwave heating treatment to obtain a tampon body; finally, the tampon body is compressed into a catheter to obtain a tampon using a sponge as a core.
2. The preparation method according to claim 1, characterized in that: The sponge core comprises the following components in parts by weight: 30-50 parts of polyisocyanate, 90-100 parts of polyol, 15-20 parts of functionalized cotton fiber, 1.5-2.5 parts of water, 0.6-1.2 parts of silicone oil and 0.3-0.5 parts of catalyst.
3. The preparation method according to claim 2, characterized in that: The polyisocyanate is at least one of toluene diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate.
4. The preparation method according to claim 2, characterized in that: The polyol is at least one of polylactic acid polyol, poly(ethylene glycol) lactide polyol, polyethylene glycol, polypropylene glycol, polyglycerol, and ethylene glycol-propylene glycol copolymer polyol.
5. The preparation method according to claim 2, characterized in that: The preparation method of the functionalized cotton fiber is as follows: (1) dispersing cotton fibers treated with plasma in water, adding epichlorohydrin and ethylenediamine thereto, heating and stirring to react, and after the reaction is completed, filtering, washing, and drying the reaction product to obtain ethylenediamine-modified cotton fibers; (2) dispersing montmorillonite in an aqueous solution of sodium dodecyl sulfate, adding an aqueous solution of NaOH, adding carboxymethyl chitosan, and heating for reaction; after the reaction is completed, cooling, filtering, washing until the pH value of the filtrate is neutral, and then drying to obtain chitosan-modified montmorillonite; (3) Dispersing ethylenediamine-modified cotton fibers in an ethanol aqueous solution, adding chitosan-modified montmorillonite and epichlorohydrin, stirring and mixing, adding an aqueous NaOH solution, heating and stirring to react for 3-5 hours, then adding guar gum hydroxypropyltrimethylammonium chloride, continuing to keep warm and react for 2-4 hours, cooling, filtering, collecting solids, and washing and drying the solids to obtain functionalized cotton fibers.
6. The preparation method according to claim 5, characterized in that: In the step (1), the mass ratio of cotton fiber, epichlorohydrin and ethylenediamine is 10-20:2-3:3-5.
7. The preparation method according to claim 5, characterized in that: In the step (2), the mass ratio of montmorillonite to carboxymethyl chitosan is 1-2:
1.
8. The preparation method according to claim 5, characterized in that: In the step (3), the mass ratio of ethylenediamine-modified cotton fiber, chitosan-modified montmorillonite, epichlorohydrin, and guar gum hydroxypropyltrimethylammonium chloride is 5-10:4-6:10-15:6-8.
9. The preparation method according to claim 2, characterized in that: The preparation method of the sponge core is as follows: S1: adding functionalized cotton fiber to polyol, stirring and dispersing it fully, then adding silicone oil and water in sequence, stirring and dispersing them at room temperature to form a uniform mixed solution; S2: adding polyisocyanate to the mixed solution obtained in step S1, dispersing it evenly at room temperature, adding a catalyst, transferring it into a mold at 50-60° C., molding it in the mold for 5-10 minutes, and demolding it to obtain a sponge core.
10. A tampon using a sponge as a core, characterized in that: The invention is prepared by the preparation method according to any one of claims 1 to 9.