Tampon integrating sewing thread and pull rope

Abstract

The invention discloses a tampon integrating a sewing thread and a pull rope, and belongs to the technical field of hygienic products. According to the tampon integrating the sewing thread and the pull rope, firstly, cotton fibers are carded, overlaid, shaped and cut to obtain a cotton fiber layer, then non-woven fabric is adopted for wrapping and pressing, the strip-shaped fiber layer is sewn, fixed and curled through composite fibers, and the strip-shaped fiber layer is loaded into a guide pipe to obtain the tampon integrating the sewing thread and the pull rope. By directly sewing the strip-shaped fiber layer through the composite fibers, the problems that in the prior art, the process cost is high, sewing threads and pull ropes can deviate and be forked due to the fact that the pull ropes are not fixed in the sewing process, and the composite fibers and the strip-shaped fiber layer are connected more tightly and cannot be separated easily are solved. And the problem that the pull rope falls off due to insufficient sewing thread strength or improper sewing process in the traditional process can be avoided. According to the design, the connecting strength of the composite fiber and the strip-shaped fiber layer is improved, the production process is simplified, and the reliability of a product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, and particularly relates to a tampon with a sewing thread and a drawstring integrated. Background Art

[0002] As a female menstrual care product, tampons have been widely used globally in recent years due to their convenience and concealment. The basic structure of a tampon usually includes an absorbent body, a shell (such as a pusher or a catheter), and a drawstring. The main function of the drawstring is to facilitate the user to remove the tampon from the body after use. Therefore, its strength, comfort, and hygiene directly affect the user experience.

[0003] Currently, the drawstrings of tampons on the market are usually made of cotton threads, polyester threads, or other fiber materials. Although these materials have certain strength and softness, there are still the following problems in actual use. Traditional drawstring materials may cause friction to the skin due to their rough surface or high hardness, affecting the user experience; the drawstring may adsorb menstrual blood or other body fluids during use. If the material does not have good antibacterial properties, it may lead to bacterial growth and increase the risk of infection. Moreover, in the traditional process, the drawstring is sewn to the strip-shaped fiber layer through a sewing thread. This connection method has high process costs on the one hand. On the other hand, during the sewing process, since the drawstring is not fixed, the sewing thread and the drawstring will deviate and fork, and the drawstring may fall off due to insufficient strength of the sewing thread or improper sewing process, resulting in difficult removal, further increasing the use risk and affecting the safety and user experience of the product.

[0004] Chinese Patent Document CN119265936A provides an antibacterial linear drawstring material for tampons and its preparation method. In the present invention, first, through the action of a cross-linking agent epichlorohydrin, a polyguanidine salt with antibacterial function is grafted on the surface of nano-titanium dioxide. Subsequently, the modified nano-titanium dioxide antibacterial agent and PET resin are melt-blended and then spun to improve the antibacterial performance of the fiber material; the composite emulsion provided by the present invention uses 3,5-bis(trifluoromethyl)styrene to replace traditional styrene, improving the anti-fouling performance of the fiber; at the same time, polypyrrole is introduced into the composite emulsion to improve the antistatic performance of the fiber and avoid the discomfort caused by static electricity; and then through the action of a cross-linking agent genipin, the bonding strength between the antibacterial fiber and the composite emulsion coating is improved, and the composite emulsion coating is not easy to fall off. After multiple washes, the fiber material still has good antistatic and anti-fouling properties. This application mainly focuses on the improvement of the antibacterial, anti-fouling, and antistatic properties of the fiber material, but does not optimize for the special use requirements of tampon drawstrings, especially the air permeability, skin-friendly property, and mechanical properties need to be further improved. Summary of the Invention

[0005] The main object of the present invention is to propose a tampon with a sewing thread and a drawstring integrated. By directly sewing a composite fiber onto a strip-shaped fiber layer, the connection between the composite fiber and the strip-shaped fiber layer is made more secure, avoiding the problem of drawstring detachment caused by insufficient sewing thread strength or improper sewing techniques in traditional processes. This design not only improves the connection strength between the composite fiber and the strip-shaped fiber layer but also simplifies the production process and enhances the reliability of the product. By improving the composite fiber material, the mechanical properties, antibacterial properties, skin-friendly properties, and breathability of the composite fiber are significantly enhanced, solving the problems of insufficient antibacterial properties, breathability, skin-friendly properties, and strength of the composite fiber in a humid and hot environment, meeting the usage requirements of tampons.

[0006] To achieve the above object, the present invention proposes a tampon with a sewing thread and a drawstring integrated and its preparation method, which includes the following steps:

[0007] S1. Card the cotton fibers. After carding, lay them into a single layer of cotton fibers. Then stack and composite the single-layer cotton fibers for shaping and cut them to obtain a cotton fiber layer. Wrap the cotton fiber layer with non-woven fabric and then press it into a strip-shaped fiber layer.

[0008] S2. Sew the strip-shaped fiber layer with the composite fiber, leaving the end of the composite fiber exposed 10 - 20 cm outside the strip-shaped fiber layer. Then curl the sewn strip-shaped fiber layer into a long cylindrical absorbent body, press and shape it in a former, and then perform microwave heating treatment to obtain the tampon body of the tampon. Finally, compress the tampon body of the tampon into a catheter to obtain a tampon with a sewing thread and a drawstring integrated.

[0009] Preferably, in step S1, the gram weight of the single-layer cotton fiber is 12 - 16 g / m 2 , and the gram weight of the cotton fiber layer is 120 - 200 g / m 2 .

[0010] Preferably, in step S1, the gram weight of the non-woven fabric is 30 - 50 g / m 2 .

[0011] Preferably, in step S2, the temperature of the microwave heating is 50 - 65 °C, and the time of the microwave heating is 2 - 8 s.

[0012] The present invention provides a tampon obtained by the preparation method of the tampon with a sewing thread and a drawstring integrated.

[0013] Preferably, the preparation method of the composite fiber in step S2 includes the following steps:

[0014] (1) Add talcum powder to dilute aqueous acid solution for impregnation. After impregnation, filter, wash, and dry to obtain pretreated talcum powder. Add the pretreated talcum powder to water, then add KH550, adjust the pH value to weakly acidic, heat, add maleic anhydride after the reaction is completed, continue heating and reacting, and after the reaction is completed, filter, wash, and dry to obtain activated talcum powder;

[0015] (2) Dissolve D-limonene in N,N-dimethylformamide, add activated talcum powder and ammonium persulfate, heat and react, and filter to obtain antibacterial talcum powder;

[0016] (3) Dissolve chitosan in acetic acid aqueous solution, add antibacterial talcum powder and N-hydroxysuccinimide to it, heat and react, filter and collect the solid, wash and dry it, then disperse it in tetrahydrofuran, then add triethylamine, and dropwise add 4-(chlorosulfonyl)phenyl isocyanate for reaction under ice bath conditions. After the reaction is completed, filter, collect the solid, wash and dry to obtain modified talcum powder;

[0017] (4) Mix and melt the modified talcum powder, polybutylene terephthalate resin, and PE-g-MAH to obtain a melt. The melt is spun to obtain modified fibers, and finally the modified fibers are twisted to obtain composite fibers.

[0018] Preferably, the mass ratio of pretreated diatomite, KH550, and maleic anhydride in step (1) is 50:8-10:6-8; Talcum powder is a mineral filler with a flaky structure. After the flaky particles are distributed in the resin matrix, tiny gaps or channels will be formed. These gaps can increase the porosity of the fibers to a certain extent, thereby improving the air permeability of the fibers. In this step, first treat the talcum powder with acid to increase the specific surface area of the talcum powder and make the pore structure inside the talcum powder more complex, which is beneficial to improving the adsorption performance of the talcum powder. In addition, then carry out amino modification on the talcum powder, which is beneficial to subsequent reactions. Then react the amino-functionalized talcum powder with maleic anhydride to introduce carbon-carbon double bonds and carboxyl groups on the surface of the talcum powder, providing more reaction sites for subsequent reactions.

[0019] Preferably, the mass ratio of D-limonene, activated talcum powder, and ammonium persulfate in step (2) is 2-4:5-8:0.1-0.5; The heating temperature is 60-80 °C, and the heating time is 4-6 h; In this step, the antibacterial agent D-limonene is grafted onto the talcum powder by the addition reaction of the carbon-carbon double bond on D-limonene and the carbon-carbon double bond on the active talcum powder, which is beneficial to improving the antibacterial performance of the composite fiber.

[0020] Preferably, in step (3), the concentration of the aqueous acetic acid solution is 10-15 wt%, and the mass ratio of chitosan, antibacterial talc powder, N-hydroxysuccinimide, triethylamine, and 4-(chlorosulfonyl)phenyl isocyanate is 3-5:6-10:1-3:2-4:4-6; in this step, first, the amino group on chitosan reacts with the carboxyl group on antibacterial talc powder under the action of the activator N-hydroxysuccinimide to graft biocompatible chitosan onto talc powder, and then the hydroxyl group on chitosan reacts with the sulfonyl chloride on 4-(chlorosulfonyl)phenyl isocyanate to carry out an esterification reaction, thereby grafting 4-(chlorosulfonyl)phenyl isocyanate onto talc powder, which is beneficial to further improving the skin-friendly property, antibacterial property, and reactivity of the modified talc powder.

[0021] Preferably, in step (4), the mass ratio of the modified talc powder, polybutylene terephthalate resin, and PE-g-MAH is 2-4:10-20:1; in this step, the modified talc powder, polybutylene terephthalate resin, and PE-g-MAH are melt-blended and then spun. On the one hand, during the process of melt-blending and spinning, the isocyanate groups on the modified talc powder crosslink with the polybutylene terephthalate resin, which is beneficial to improving the bonding strength between the modified talc powder and the polybutylene terephthalate resin and enhancing the compatibility between the modified talc powder and the polybutylene terephthalate resin. During the spinning and twisting processes, the flaky structure of the talc powder will form tiny channels or pores in the fiber, thereby improving the air permeability of the fiber; on the other hand, it also improves the dispersion of D-limonene, chitosan, and 4-(chlorosulfonyl)phenyl isocyanate in the fiber and makes the combination more firm, so that the composite fiber has good antibacterial properties.

[0022] The present invention also provides a composite fiber prepared by the preparation method of the composite fiber.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1) The preparation method of a tampon with a sewing thread and a drawstring integrated provided by the present invention first combs, stacks, shapes, and cuts cotton fibers to obtain a cotton fiber layer, then wraps and presses it with non-woven fabric, and sews and fixes the strip-shaped fiber layer with a composite fiber, curls it, and loads it into a catheter to obtain a tampon with a sewing thread and a drawstring integrated; it solves the problems in the prior art such as high process cost, the drawstring running off and bifurcating during sewing due to lack of fixation, and insufficient strength, poor antibacterial and air permeability during use, and meets the high requirements during the use of tampons.

[0025] 2) By adding talcum powder to the fiber, the lubricity and air permeability of the fiber can be improved, avoiding friction on the skin caused by the rough surface of the composite fiber and thus generating discomfort. By modifying the talcum powder, tiny pores and channel structures are formed in the fiber, significantly improving the air permeability and moisture wicking performance of the composite fiber. Such composite fiber can effectively improve the local microenvironment in the vagina, reduce the formation of a hot and humid environment, thereby reducing the risk of bacterial growth and further enhancing the safety of using the tampon. By grafting an antibacterial agent onto the talcum powder, the antibacterial agent is not easily detached and is evenly distributed in the fiber, capable of inhibiting bacterial reproduction for a long time, which is beneficial to improving the antibacterial performance of the composite fiber. By grafting chitosan, the composite fiber has high skin-friendly properties and further enhances the antibacterial property of the composite fiber; by introducing 4-(chlorosulfonyl)phenyl isocyanate onto the talcum powder, the modified talcum powder can crosslink with the polybutylene terephthalate resin during the process of melt blending and spinning, which is beneficial to improving the bonding strength between the modified talcum powder and the polybutylene terephthalate resin. When the composite fiber is subjected to a large tensile force, it can maintain good strength and toughness, avoiding inconvenience in use or potential safety hazards caused by the fracture of the composite fiber, and meeting the high-strength requirements during the use of the tampon. Detailed implementation mode

[0026] To avoid repetition, unless otherwise specified, the items used in the following examples are all commercially available products, and the methods used are all conventional methods unless otherwise specified.

[0027] The sources of some raw materials used in the present invention are as follows:

[0028] Talcum powder, 325 mesh, purchased from Tianjin Yandong Haotian Mineral Products Co., Ltd.

[0029] Chitosan, deacetylation degree ≥ 85%, purchased from Qingdao Yuekang Biotechnology Co., Ltd.

[0030] PE-g-MAH, grade 9905D-1, purchased from Guangdong Chuanheng New Materials Technology Co., Ltd.

[0031] Polybutylene terephthalate resin, melt mass flow rate of 33 g / 10 min, purchased from Meisuda (Suzhou) New Materials Co., Ltd.

[0032] Example 1

[0033] A method for preparing a tampon with a sewing thread and a drawstring integrated, comprising the following steps:

[0034] S1. Card the cotton fiber, and after carding, lay it into a single layer of cotton fiber. The gram weight of the single layer of cotton fiber is 15 g / m 2, subsequently, the single-layer cotton fibers are stacked, compounded and shaped, and then cut to obtain a cotton fiber layer with a grammage of 150 g / m². 2 The cotton fiber layer is wrapped with non-woven fabric with a grammage of 40 g / m². 2 Then it is pressed into a strip-shaped fiber layer.

[0035] S2. Sew the strip-shaped fiber layer with composite fiber, with the end of the composite fiber exposed 15 cm outside the strip-shaped fiber layer. Then, the sewn strip-shaped fiber layer is curled to form a long cylindrical absorbent body, which is pressed and shaped in a former and then microwave-heated at 60 °C for 6 s to obtain the tampon body of the sanitary tampon. Finally, the tampon body of the sanitary tampon is compressed into a catheter to obtain a sanitary tampon with the sewing thread and the drawstring integrated.

[0036] The preparation method of the composite fiber includes the following steps:

[0037] (1) Add 100 g of talcum powder to 400 mL of 1 mol / L dilute acid aqueous solution, impregnate for 3 h, filter, wash and dry after impregnation to obtain pretreated talcum powder; add 50 g of pretreated talcum powder to 200 mL of water, then add 9.2 g of KH550, adjust the pH value to 5, heat and react at 60 °C for 2 h, add 7.5 g of maleic anhydride after the reaction is completed, heat and react at 70 °C for 3 h, filter, wash and dry after the reaction is completed to obtain activated talcum powder.

[0038] (2) Dissolve 21 g of D-limonene in 200 mL of N,N-dimethylformamide, add 42 g of activated talcum powder and 2 g of ammonium persulfate, heat and react at 70 °C for 3 h, and filter to obtain antibacterial talcum powder.

[0039] (3) Dissolve 20 g of chitosan in 300 mL of 12 wt% acetic acid aqueous solution, add 40 g of antibacterial talcum powder and 10 g of N-hydroxysuccinimide thereto, heat and react at 60 °C for 4 h, filter and collect the solid, wash and dry it, then disperse it in 300 mL of tetrahydrofuran, then add 15 g of triethylamine, dropwise add 25 g of 4-(chlorosulfonyl)isocyanatobenzene under ice bath conditions, react at room temperature for 2 h after dropping, filter after the reaction is completed, collect the solid matter, wash and dry to obtain modified talcum powder.

[0040] (4) Mix and melt 30 g of modified talcum powder, 150 g of polybutylene terephthalate resin and 10 g of PE-g-MAH to obtain a melt. The melt is spun to obtain modified fibers, and finally the modified fibers are twisted to obtain composite fibers.

[0041] Example 2

[0042] A tampon with a sewing thread and a drawstring integrated therewith, and a preparation method thereof, comprising the following steps:

[0043] S1. Card the cotton fibers. After carding, lay them into a single layer of cotton fibers with a grammage of 12 g / m. 2 Subsequently, stack and compound and shape the single layer of cotton fibers, and then obtain a cotton fiber layer through cutting. The grammage of the cotton fiber layer is 120 g / m. 2 Wrap the cotton fiber layer with non-woven fabric with a grammage of 30 g / m. 2 Then press it into a strip-shaped fiber layer.

[0044] S2. Sew the strip-shaped fiber layer with composite fibers. The tail end of the composite fibers is exposed 10 cm outside the strip-shaped fiber layer. Then curl the sewn strip-shaped fiber layer to form a long cylindrical absorbent body, press and shape it in a former, and then perform microwave heating treatment at 50 °C for 8 s to obtain the tampon body of the tampon. Finally, compress the tampon body of the tampon into a catheter to obtain a tampon with a sewing thread and a drawstring integrated therewith.

[0045] The preparation method of the composite fibers comprises the following steps:

[0046] (1) Add 100 g of talcum powder to 400 mL of 1 mol / L dilute acid aqueous solution, impregnate for 3 h, filter, wash, and dry after impregnation to obtain pretreated talcum powder. Add 50 g of pretreated talcum powder to 200 mL of water, then add 8 g of KH550, adjust the pH value to 6, heat and react at 60 °C for 2 h. After the reaction is completed, add 6 g of maleic anhydride, heat and react at 70 °C for 3 h. After the reaction is completed, filter, wash, and dry to obtain activated talcum powder.

[0047] (2) Dissolve 16 g of D-limonene in 200 mL of N,N-dimethylformamide, add 40 g of activated talcum powder and 0.8 g of ammonium persulfate, heat and react at 60 °C for 4 h, and filter to obtain antibacterial talcum powder.

[0048] (3) Dissolve 18 g of chitosan in 300 mL of 10 wt% acetic acid aqueous solution, add 36 g of antibacterial talcum powder and 6 g of N-hydroxysuccinimide thereto, heat and react at 60 °C for 4 h. Filter and collect the solid, wash and dry it, and then disperse it in 300 mL of tetrahydrofuran. Then add 12 g of triethylamine, and dropwise add 24 g of 4-(chlorosulfonyl)phenyl isocyanate under ice bath conditions. After the dropping is completed, react at room temperature for 2 h. After the reaction is completed, filter, collect the solid matter, wash and dry it to obtain modified talcum powder.

[0049] (4) Mix 20 g of modified talcum powder, 100 g of polybutylene terephthalate resin, and 10 g of PE-g-MAH and melt them to obtain a melt. The melt is spun to obtain modified fibers, and finally the modified fibers are twisted to obtain composite fibers.

[0050] Example 3

[0051] A tampon with a sewing thread and a drawstring integrated, and its preparation method, comprising the following steps:

[0052] S1. Card the cotton fibers. After carding is completed, lay them out into a single layer of cotton fibers with a gram weight of 16 g / m 2 , and then stack and compound and shape the single layer of cotton fibers, and then cut them to prepare a cotton fiber layer with a gram weight of 200 g / m 2 ; Wrap the cotton fiber layer with non-woven fabric with a gram weight of 50 g / m 2 ; Then press it into a strip-shaped fiber layer;

[0053] S2. Sew the strip-shaped fiber layer with the composite fiber. The tail end of the composite fiber is exposed 20 cm outside the strip-shaped fiber layer. Then curl the sewn strip-shaped fiber layer to form a long cylindrical absorber, press and shape it in a former, and then microwave heat-treat it at 65 °C for 2 s to obtain the tampon body of the tampon; Finally, compress the tampon body of the tampon into a catheter to obtain a tampon with a sewing thread and a drawstring integrated.

[0054] The preparation method of the composite fiber comprises the following steps:

[0055] (1) Add 100 g of talcum powder to 400 mL of 1 mol / L dilute acid aqueous solution, impregnate for 3 h, filter, wash, and dry after impregnation to obtain pretreated talcum powder; Add 50 g of pretreated talcum powder to 200 mL of water, then add 10 g of KH550, adjust the pH value to 6, heat and react at 60 °C for 2 h, add 8 g of maleic anhydride after the reaction is completed, heat and react at 70 °C for 3 h, and filter, wash, and dry after the reaction is completed to obtain activated talcum powder;

[0056] (2) Dissolve 20 g of D-limonene in 200 mL of N,N-dimethylformamide, add 40 g of activated talcum powder and 2.5 g of ammonium persulfate, heat and react at 80 °C for 3 h, and filter to obtain antibacterial talcum powder;

[0057] (3) Dissolve 20 g of chitosan in 300 mL of 15 wt% aqueous acetic acid solution, add 40 g of antibacterial talc powder and 12 g of N-hydroxysuccinimide thereto, heat and react at 60 °C for 4 h, filter and collect the solid, wash and dry it, then disperse it in 300 mL of tetrahydrofuran, then add 16 g of triethylamine, dropwise add 24 g of 4-(chlorosulfonyl)phenyl isocyanate under ice bath conditions, after the addition is completed, react at room temperature for 2 h, after the reaction is completed, filter, collect the solid and wash and dry to obtain modified talc powder;

[0058] (4) Mix and melt 40 g of modified talc powder, 200 g of polybutylene terephthalate resin, and 10 g of PE-g-MAH to obtain a melt. The melt is spun to obtain modified fibers, and finally the modified fibers are twisted to obtain composite fibers.

[0059] Comparative Example 1

[0060] A sanitary tampon with a sewing thread and a drawstring integrated, and its preparation method is similar to that of Example 1, the difference is that 4-(chlorosulfonyl)phenyl isocyanate is not grafted onto the modified talc powder, and it includes the following steps:

[0061] S1. Card the cotton fibers, after carding is completed, lay them into a single layer of cotton fibers, the gram weight of the single layer of cotton fibers is 15 g / m 2 , then stack and compound and shape the single layer of cotton fibers, and then cut to prepare a cotton fiber layer, the gram weight of the cotton fiber layer is 150 g / m 2 ; wrap the cotton fiber layer with non-woven fabric, the gram weight of the non-woven fabric is 40 g / m 2 ; then press it into a strip-shaped fiber layer;

[0062] S2. Sew the strip-shaped fiber layer with composite fibers, the tail end of the composite fiber is exposed 15 cm outside the strip-shaped fiber layer, then curl the sewn strip-shaped fiber layer to form a long cylindrical absorbent body, press and shape it in a former, and then microwave heat-treat it at 60 °C for 6 s to obtain the tampon body of the sanitary tampon; finally compress the tampon body of the sanitary tampon into a catheter to obtain a sanitary tampon with a sewing thread and a drawstring integrated.

[0063] The preparation method of the composite fiber includes the following steps:

[0064] (1) Add 100 g of talc powder to 400 mL of 1 mol / L dilute acid aqueous solution, impregnate for 3 h, after impregnation is completed, filter, wash and dry to obtain pretreated talc powder; add 50 g of pretreated talc powder to 200 mL of water, then add 9.2 g of KH550, adjust the pH value to 5, heat and react at 60 °C for 2 h, after the reaction is completed, add 7.5 g of maleic anhydride, heat and react at 70 °C for 3 h, after the reaction is completed, filter, wash and dry to obtain activated talc powder;

[0065] (2) Dissolve 21 g of D-limonene in 200 mL of N,N-dimethylformamide, add 42 g of activated talc powder and 2 g of ammonium persulfate, heat and react at 70 °C for 3 h, and filter to obtain antibacterial talc powder;

[0066] (3) Dissolve 20 g of chitosan in 300 mL of 12 wt% acetic acid aqueous solution, add 40 g of antibacterial talc powder and 10 g of N-hydroxysuccinimide thereto, heat and react at 60 °C for 4 h, filter and collect the solid, wash and dry to obtain modified talc powder;

[0067] (4) Mix and melt 30 g of modified talc powder, 150 g of polybutylene terephthalate resin and 10 g of PE-g-MAH to obtain a melt. The melt is spun to obtain modified fibers, and finally the modified fibers are twisted to obtain composite fibers.

[0068] Comparative Example 2

[0069] A sanitary tampon with a sewing thread and a drawstring integrated, and its preparation method is similar to that of Example 1, except that the modified talc powder is antibacterial talc powder, and the specific steps are as follows:

[0070] S1. Card the cotton fibers. After carding is completed, lay them into a single layer of cotton fibers. The gram weight of the single layer of cotton fibers is 15 g / m 2 , and then stack and composite the single layer of cotton fibers, and cut them after shaping to prepare a cotton fiber layer. The gram weight of the cotton fiber layer is 150 g / m 2 ; Wrap the cotton fiber layer with non-woven fabric. The gram weight of the non-woven fabric is 40 g / m 2 ; Then press it into a strip-shaped fiber layer;

[0071] S2. Sew the strip-shaped fiber layer with the composite fiber. The tail end of the composite fiber is exposed 15 cm outside the strip-shaped fiber layer. Then curl the sewn strip-shaped fiber layer to form a long cylindrical absorbent body, press and shape it in a former, and then microwave heat-treat it at 60 °C for 6 s to obtain the tampon body of the sanitary tampon; Finally, compress the tampon body of the sanitary tampon into a catheter to obtain a sanitary tampon with a sewing thread and a drawstring integrated.

[0072] The preparation method of the composite fiber includes the following steps:

[0073] (1) Add 100 g of talcum powder to 400 mL of 1 mol / L dilute acid aqueous solution, impregnate for 3 h, filter, wash, and dry after impregnation to obtain pretreated talcum powder; add 50 g of pretreated talcum powder to 200 mL of water, then add 9.2 g of KH550, adjust the pH value to 5, heat and react at 60 °C for 2 h, add 7.5 g of maleic anhydride after the reaction is completed, heat and react at 70 °C for 3 h, filter, wash, and dry after the reaction is completed to obtain activated talcum powder;

[0074] (2) Dissolve 21 g of D-limonene in 200 mL of N,N-dimethylformamide, add 42 g of activated talcum powder and 2 g of ammonium persulfate, heat and react at 70 °C for 3 h, filter to obtain antibacterial talcum powder, which is the modified talcum powder;

[0075] (3) Mix and melt 30 g of modified talcum powder, 150 g of polybutylene terephthalate resin, and 10 g of PE-g-MAH to obtain a melt, spin the melt to obtain modified fibers, and finally twist the modified fibers to obtain composite fibers.

[0076] Comparative Example 3

[0077] A tampon with a sewing thread and a drawstring integrated, and its preparation method is similar to that of Example 1, the difference is that the modified talcum powder is activated talcum powder, and the specific steps are as follows:

[0078] S1. Card the cotton fibers, lay them into a single layer of cotton fibers after carding, the gram weight of the single layer of cotton fibers is 15 g / m 2 , then stack and composite the single layer of cotton fibers and cut them to prepare a cotton fiber layer, the gram weight of the cotton fiber layer is 150 g / m 2 ; wrap the cotton fiber layer with non-woven fabric, the gram weight of the non-woven fabric is 40 g / m 2 ; then press it into a strip-shaped fiber layer;

[0079] S2. Sew the strip-shaped fiber layer with composite fibers, the tail end of the composite fiber is exposed 15 cm outside the strip-shaped fiber layer, then curl the sewn strip-shaped fiber layer to form a long cylindrical absorbent body, press and shape it in a former and then microwave heat-treat it at 60 °C for 6 s to obtain the tampon body of the tampon; finally compress the tampon body of the tampon into a catheter to obtain a tampon with a sewing thread and a drawstring integrated.

[0080] The preparation method of the composite fiber includes the following steps:

[0081] (1) Add 100 g of talcum powder to 400 mL of 1 mol / L dilute acid aqueous solution, impregnate for 3 h, filter, wash, and dry after impregnation to obtain pretreated talcum powder; add 50 g of pretreated talcum powder to 200 mL of water, then add 9.2 g of KH550, adjust the pH value to 5, heat and react at 60 °C for 2 h, add 7.5 g of maleic anhydride after the reaction is completed, heat and react at 70 °C for 3 h, filter, wash, and dry after the reaction is completed to obtain activated talcum powder, which is the modified talcum powder;

[0082] (2) Mix and melt 30 g of modified talcum powder, 150 g of polybutylene terephthalate resin, and 10 g of PE-g-MAH to obtain a melt. The melt is spun to obtain modified fibers, and finally the modified fibers are twisted to obtain composite fibers.

[0083] Performance testing

[0084] Tensile strength test: Conduct mechanical property tests on the composite fibers prepared in Examples 1-3 and Comparative Examples 1-3. The test results are shown in Table 1:

[0085] Table 1 Mechanical property results of composite fibers

[0086]

[0087]

[0088] It can be seen from the experimental data in Table 1 that the composite fibers prepared by the present invention have good mechanical properties.

[0089] Antibacterial property test: Twist and weave the modified fibers obtained in Examples 1-3 and Comparative Examples 1-3 into fabrics with a fabric weight of 205 ± 5 g / m 2 , and the detection standard refers to GB / T20944.3-2008; among them, the test bacteria are Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 25922), and the action time is 3 h. The test results are shown in Table 2:

[0090] Table 2 Antibacterial property test results of fabrics

[0091]

[0092] Air permeability test: Cut the above-mentioned fabric into specimens with an area of 20 cm 2 , and refer to the national standard GB / T5453-1997 "Determination of fabric air permeability of textiles" to test the air permeability; the test results are shown in Table 3:

[0093] Table 3 Air permeability test results of fabrics

[0094]

[0095]

[0096] As can be seen from the experimental results in Table 2 and Table 3, the modified fibers prepared by the present invention have good antibacterial and breathable properties, and can avoid the stuffy feeling in the private parts of women.

[0097] The above are only the 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 can have various changes and modifications. 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 sewing thread and a draw cord in one, characterized in that: The steps include: S1, combing the cotton fibers, laying them into a single layer of cotton fibers after combing, then stacking and compounding the single layer of cotton fibers, and then cutting them to obtain a cotton fiber layer, wrapping the cotton fiber layer with a non-woven fabric, and then pressing them into a strip-shaped fiber layer; S2. Sewing the strip fiber layer with composite fiber, with the tail end of the composite fiber exposed 10-20 cm outside the strip fiber layer, and then curling the sewn strip fiber layer to form a long cylindrical absorbent body, pressing and molding it in a former, and then performing microwave heating treatment to obtain the tampon body; finally, compressing the tampon body into a catheter to obtain a tampon with sewing thread and drawstring integrated.

2. The preparation method according to claim 1, characterized in that: The weight of the single-layer cotton fiber in step S1 is 12-16 g / m 2 The cotton fiber layer has a gram weight of 120-200 g / m 2 .

3. The preparation method according to claim 1, characterized in that: The weight of the nonwoven fabric in step S1 is 30-50 g / m 2 .

4. The preparation method according to claim 1, characterized in that: The method for preparing the composite fiber in step S2 comprises the following steps: (1) adding talc powder to a dilute acid aqueous solution for impregnation, filtering, washing, and drying after the impregnation is completed to obtain pretreated talc powder; adding the pretreated talc powder to water, then adding KH550, adjusting the pH value to be weakly acidic, heating, adding maleic anhydride after the reaction is completed, continuing the heating reaction, filtering, washing, and drying after the reaction is completed to obtain activated talc powder; (2) dissolving D-limonene in N,N-dimethylformamide, adding activated talc and ammonium persulfate, heating for reaction, and filtering to obtain antibacterial talc; (3) dissolving chitosan in an acetic acid aqueous solution, adding antibacterial talc and N-hydroxysuccinimide thereto, heating for reaction, filtering and collecting the solid, washing and drying, and then dispersing it in tetrahydrofuran, then adding triethylamine, and adding 4-(chlorosulfonyl)phenyl isocyanate dropwise in an ice bath for reaction, filtering after the reaction is completed, collecting the solid, washing and drying to obtain modified talc; (4) Modified talcum powder, polybutylene terephthalate resin, and PE-g-MAH are mixed and melted to obtain a melt, the melt is spun to obtain modified fibers, and finally the modified fibers are twisted to obtain composite fibers.

5. The preparation method according to claim 4, characterized in that: In the step (1), the mass ratio of pretreated diatomaceous earth, KH550 and maleic anhydride is 50:8-10:6-8.

6. The preparation method according to claim 4, characterized in that: In the step (2), the mass ratio of D-limonene, activated talc and ammonium persulfate is 2-4:5-8:0.1-0.

5.

7. The preparation method according to claim 4, characterized in that: The concentration of the acetic acid aqueous solution in the step (3) is 10-15wt%, and the mass ratio of the chitosan, antibacterial talc, N-hydroxysuccinimide, triethylamine, and 4-(chlorosulfonyl)phenyl isocyanate is 3-5:6-10:1-3:2-4:4-6.

8. The preparation method according to claim 4, characterized in that: In the step (4), the mass ratio of modified talcum powder, polybutylene terephthalate resin and PE-g-MAH is 2-4:10-20:

1.

9. A composite fiber, characterized in that: The compound is prepared by the preparation method according to any one of claims 4 to 8.

10. A tampon with a sewing thread and a drawstring integrated into one, characterized in that: The compound is prepared by the preparation method according to any one of claims 1 to 8.

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