Wear resistant vortex spun core spun yarn and method of making same

Abstract

The application discloses a wear-resistant vortex spinning core-spun yarn and a preparation method thereof. The core-spun yarn comprises a core yarn and a wrapping yarn, the mass of the core yarn is 30-50% of the mass of the wrapping yarn; the core yarn is zinc-modified cotton yarn obtained through vortex spinning of zinc-modified cotton fibers; and the wrapping yarn is an antibacterial wear-resistant agent modified cotton yarn obtained through vortex spinning of the antibacterial wear-resistant agent modified cotton fibers. The zinc-modified cotton yarn is used as the core yarn, the antibacterial wear-resistant agent modified cotton yarn is used as the wrapping yarn, and the wear-resistant vortex spinning core-spun yarn is prepared through vortex spinning, so that the wear resistance and the antibacterial property of the core-spun yarn product are ensured due to the stable combination of zinc and the antibacterial wear-resistant agent. The cytotoxicity test result also shows that the core-spun yarn product of the application does not obviously produce toxicity to organisms.

Description

Technical Field

[0001] This invention relates to the field of vortex spinning fabric technology, and in particular to a wear-resistant vortex spinning core-spun yarn and its preparation method. Background Technology

[0002] With rapid societal development, spinning technology has undergone a series of transformations in production methods. Air-jet vortex spinning, as a relatively new spinning technology, has gained widespread acclaim in the spinning industry due to its advantages such as high efficiency, large output, low labor intensity, superior working environment, less yarn hairiness, and smooth appearance. Core-spun yarn is generally made by twisting together a core of strong and elastic synthetic fiber filaments with short fibers such as cotton, wool, or viscose fibers. It combines the excellent properties of both filament core yarn and outer short fiber yarn, exhibiting high strength and elasticity, as well as good abrasion resistance and wrinkle resistance. Therefore, it is widely used in the production of high-end clothing, bedding, and plush toys. The use of air-jet vortex spinning to prepare core-spun yarn materials is now very common.

[0003] Several studies have yielded high-performance vortex-spun core-spun yarns. For example, CN114438639A discloses an abrasion-resistant vortex-spun core-spun yarn and its manufacturing process. This method involves winding a core yarn and a composite yarn together to produce the vortex-spun core-spun yarn. The composite yarn is obtained by impregnating the yarn with a modified sizing agent, which includes cross-linked chitosan, bamboo charcoal fiber, a bulking agent, epoxy resin, and a thickener. This effectively improves the mechanical properties of the yarn, enabling the vortex-spun core-spun yarn to resist repeated washing. Furthermore, the vortex-spun core-spun yarn exhibits antibacterial properties, is resistant to abrasion and breakage, and possesses excellent tensile and breakage resistance. CN114395835A discloses a functional vortex-spun core-spun yarn, comprising a core yarn and a wrapping yarn. The core yarn accounts for 45-50% of the total weight of the functional vortex-spun core-spun yarn. The short fibers of the wrapping yarn are one or more of cotton, Tencel, or viscose fibers mixed with far-infrared fibers and antibacterial carbon nanofibers. The antibacterial carbon nanofibers account for 20-40 wt.% of the wrapping yarn; the far-infrared fibers account for 5-10 wt.% of the wrapping yarn; and the core yarn is spandex filament. The wrapping yarn, with the spandex filaments vortex-spun, is vortex-spun to obtain the functional vortex-spun core-spun yarn. This method, by adding far-infrared fibers and antibacterial carbon nanofibers to the wrapping yarn, enables the obtained functional vortex-spun core-spun yarn to possess far-infrared health care functions. The synergistic antibacterial effect of carbon nanofibers and nano-silver in the yarn gives the vortex-spun core-spun yarn long-lasting antibacterial properties.

[0004] It can be seen that adding functional substances to the core and wrapping yarn can improve the performance of vortex-spun core-spun yarn, but there is currently little research on core-spun yarn that combines antibacterial and wear-resistant properties. Summary of the Invention

[0005] To address the technical problems existing in the prior art, the present invention provides a wear-resistant vortex-spun core-spun yarn, characterized in that it comprises a core yarn and a wrapping yarn, wherein the mass of the core yarn is 30% to 50% of the mass of the wrapping yarn;

[0006] The core yarn is zinc-modified cotton yarn obtained by vortex spinning of zinc-modified cotton fibers.

[0007] The wrapping yarn is an antibacterial and abrasion-resistant modified cotton yarn obtained by vortex spinning of antibacterial and abrasion-resistant modified cotton fibers.

[0008] Some studies have shown that textiles with antibacterial properties can be prepared by immersing fabrics in a metal solution. Zinc is safe, widely available, and can be a reliable modification option.

[0009] Protamine is a natural cationic peptide that mainly exists in the nucleus of mature sperm cells in fish (such as salmon, trout, and herring) as a nucleoprotein that binds to DNA. It possesses strong antibacterial activity and has been used as a preservative in food storage. The antibacterial mechanism of protamine is related to the electrostatic interaction between cationic arginine residues and the negatively charged cell membrane of bacteria. After cotton fibers are oxidized, their surface acquires numerous functional groups. Protamine can be anchored to the oxidized cotton fiber surface through stable chemical bonds, thus ensuring stable antibacterial properties in the fabric.

[0010] Quaternary ammonium salts include octadecyltrimethylammonium chloride, polyquaternium-7, N-octadecyl-γ-bisquaternium salt, and polyquaternium-47. They are non-toxic or low-toxic and are often used as surfactants and conditioning agents because the quaternary ammonium groups they contain also have good antibacterial properties. At the same time, they can also be anchored to oxidized cotton fibers to achieve long-term modification of oxidized cotton fibers.

[0011] Furthermore, the method for preparing the zinc-modified cotton fiber includes, by weight, the following:

[0012] At 40-60℃, 5-20 parts of oxidized cotton fiber are immersed in 100-150 parts of soluble zinc salt aqueous solution for 0.5-2 hours, and then removed and dried to obtain zinc-modified cotton fiber.

[0013] Furthermore, the concentration of the soluble zinc salt aqueous solution is 0.001~0.005 mol / L.

[0014] Furthermore, the method for preparing the antibacterial and abrasion-resistant modified cotton fiber includes, by weight parts,

[0015] At 20-30℃, 5-20 parts of oxidized cotton fiber are immersed in 100-150 parts of antibacterial and abrasion-resistant aqueous solution, and stirring is maintained for 0.5-3 hours. Then, the fiber is removed, washed with water, and dried to obtain antibacterial and abrasion-resistant modified cotton fiber.

[0016] Furthermore, the mass concentration of the antibacterial and wear-resistant agent aqueous solution is 1% to 5%;

[0017] The stirring speed is 50~150 rpm.

[0018] Furthermore, the antibacterial wear-resistant agent is composed of protamine sulfate and quaternary ammonium salt mixed in a mass ratio of 1~5:1~2.

[0019] Furthermore, the quaternary ammonium salt includes at least one of octadecyltrimethylammonium chloride, polyquaternary ammonium salt-7, N-octadecyl-γ-bisquaternary ammonium salt, and polyquaternary ammonium salt-47.

[0020] Furthermore, the method for preparing the oxidized cotton fiber includes, by weight parts,

[0021] Under light-protected conditions at 20-30°C, 10-20 parts of cotton fiber were immersed in 150-300 parts of an aqueous solution of sodium periodate with a molar concentration of 0.01-0.03 mol / L and stirred at 100-200 rpm for 1-5 hours. Subsequently, the treated cotton fiber was rinsed with water and then immersed in an aqueous solution of ethylene glycol with a molar concentration of 0.005-0.01 mol / L for 0.5-1 hours. The fiber was then removed, washed with water, and dried to obtain oxidized cotton fiber.

[0022] This invention also provides a method for preparing the above-mentioned abrasion-resistant vortex-spun core-spun yarn, comprising the following steps:

[0023] Zinc-modified cotton fibers are processed through opening, cleaning, carding, drawing, and vortex spinning to obtain zinc-modified cotton yarn.

[0024] Antibacterial and abrasion-resistant modified cotton fibers are processed through opening, carding, drawing, and vortex spinning to obtain antibacterial and abrasion-resistant modified cotton yarn;

[0025] Zinc-modified cotton yarn and antibacterial abrasion-resistant agent-modified cotton yarn were vortex-spun to obtain abrasion-resistant vortex-spun core-spun yarn.

[0026] Furthermore, the process parameters for the drawing process are as follows: first-pass drawing spacing 11×9×21, total draft ratio 6~8, back zone draft ratio 1.86; second-pass drawing spacing 11×9×21, total draft ratio 6~8; third-pass drawing spacing 8×18, back zone draft ratio 1~2, yielding a finished sliver weight of 20~21g / 5m;

[0027] The process parameters for the vortex spinning are: spinning speed 430~460m / min, TDR draft ratio 220~230 times, and roller spacing 41mm×43mm.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This invention uses zinc-modified cotton yarn as the core yarn and antibacterial and abrasion-resistant agent-modified cotton yarn as the wrapping yarn, and uses vortex spinning to prepare abrasion-resistant vortex-spun core-spun yarn. Because zinc and antibacterial and abrasion-resistant agents have a stable binding effect, the abrasion resistance and antibacterial properties of the core-spun yarn product are guaranteed. The cytotoxicity test results also show that the core-spun yarn product of this invention will not produce significant toxicity to organisms. Detailed Implementation

[0030] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0031] Description of some of the raw materials used in the embodiments of this invention:

[0032] Protamine sulfate, product number 03311730, was purchased from Shaanxi Rankang Biotechnology Co., Ltd.

[0033] Octadecyltrimethylammonium chloride, model 1631, purchased from Jinan Daorong Chemical Co., Ltd.

[0034] Cotton fiber, approximately 30mm in length, sourced from Xinjiang, China.

[0035] Other raw materials not mentioned are all common in this field and can be purchased directly from the market; therefore, they will not be described in detail here.

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] A method for preparing abrasion-resistant vortex-spun core-spun yarn, comprising the following steps in parts by weight:

[0039] Step 1: Preparation of oxidized cotton fiber: Under light-protected conditions at 25°C, 20 parts of cotton fiber were immersed in 200 parts of a 0.02 mol / L sodium periodate aqueous solution and stirred at 150 rpm for 3 hours. The treated cotton fiber was then rinsed with water to remove residual sodium periodate on the surface. Subsequently, it was immersed in 200 parts of a 0.01 mol / L ethylene glycol aqueous solution for 0.5 hours to remove unreacted sodium periodate. The fiber was then removed, washed with water, and dried at 60°C to obtain oxidized cotton fiber.

[0040] Step 2: Preparation of zinc-modified cotton fiber: At 50°C, 20 parts of oxidized cotton fiber were immersed in 150 parts of zinc chloride aqueous solution with a molar concentration of 0.003 mol / L for 1 hour, and then removed and dried at 80°C to obtain zinc-modified cotton fiber.

[0041] Step 3: Preparation of zinc-modified cotton yarn: The zinc-modified cotton fiber is processed through opening and cleaning → carding → drawing → vortex spinning to obtain the core yarn. Specifically, opening and cleaning involves decomposing, opening, removing impurities, and mixing to disperse the zinc-modified cotton fiber into small bundles of fiber, removing impurities and short fibers to provide a more uniform fiber material for the next step; carding involves combing the fibers to ensure that they are ordered and parallel. Meanwhile, finer impurities and short fibers are removed to improve the purity of the cotton, resulting in slivers with uniform texture and diameter. The drawing process uses an FA320 drawing frame, utilizing the principles of drafting and merging to integrate multiple slivers. The drawing process parameters are: first-stage drawing spacing 11×9×21, total draft ratio 6.86, back zone draft ratio 1.86; second-stage drawing spacing 11×9×21, total draft ratio 6.86; third-stage drawing spacing 8×18, back zone draft ratio 1.86, producing a finished sliver weight of 20g / 5m. Vortex spinning uses a high-speed rotating airflow to bundle the fibers and rotate them in a concentrated state, twisting the fibers into yarn. The process parameters are: spinning speed 440m / min, TDR draft ratio 230, roller spacing 41mm×43mm.

[0042] Step 4: Preparation of antibacterial and wear-resistant modified cotton fiber: At 25°C, 20 parts of oxidized cotton fiber were immersed in an antibacterial and wear-resistant aqueous solution with a mass concentration of 2% (1 part of protamine sulfate, 1 part of octadecyltrimethylammonium chloride, and 100 parts of water), and stirred at 80 rpm for 2 hours. Then, the fiber was removed, washed with water, and dried at 80°C to obtain antibacterial and wear-resistant modified cotton fiber.

[0043] Step 5: Preparation of antibacterial and abrasion-resistant modified cotton yarn: Following the same process as in Step 3, antibacterial and abrasion-resistant modified cotton fibers are used to prepare antibacterial and abrasion-resistant modified cotton yarn to obtain wrapped yarn;

[0044] Step 6: Preparation of abrasion-resistant vortex-spun core-spun yarn: Place the core yarn (accounting for 30% of the mass of the wrapping yarn) and the wrapping yarn into an MVS870 air-jet vortex spinning machine and set the same vortex spinning parameters as in Step 3. Due to the centrifugal effect of the air vortex in the spinning nozzle, the yarn core is not in the fiber guiding channel, but is radially dispersed by the rotating airflow at the spindle inlet. Driven by the air vortex, it falls onto the cone surface at the front end of the spindle and rotates with the air vortex, winding around the subsequent wrapping yarn. It is then output through the yarn channel inside the spindle to obtain the core-spun yarn body. The ends of the core-spun yarn body are then heat-sealed to obtain the abrasion-resistant vortex-spun core-spun yarn.

[0045] Example 2

[0046] A method for preparing wear-resistant vortex-spun core-spun yarn is basically the same as that in Example 1, except that: in step 4, the antibacterial wear-resistant agent aqueous solution is prepared by 1.2 parts of protamine sulfate, 0.8 parts of octadecyltrimethylammonium chloride, and 100 parts of water.

[0047] Example 3

[0048] A method for preparing wear-resistant vortex-spun core-spun yarn is basically the same as that in Example 1, except that: in step 4, the antibacterial wear-resistant agent aqueous solution is prepared by 1.5 parts of protamine sulfate, 0.5 parts of octadecyltrimethylammonium chloride, and 100 parts of water.

[0049] Comparative Example 1

[0050] A method for preparing wear-resistant vortex-spun core-spun yarn is basically the same as that in Example 2, except that the antibacterial wear-resistant agent aqueous solution in step 4 is prepared by mixing 2 parts of protamine and 100 parts of water.

[0051] Comparative Example 2

[0052] A method for preparing wear-resistant vortex-spun core-spun yarn is basically the same as that in Example 2, except that the antibacterial wear-resistant agent aqueous solution in step 4 is prepared by mixing 2 parts of octadecyltrimethylammonium chloride and 100 parts of water.

[0053] Comparative Example 3

[0054] A method for preparing wear-resistant vortex-spun core-spun yarn is basically the same as that in Example 2, except that water is used instead of zinc chloride aqueous solution in step 2.

[0055] Test case

[0056] The abrasion-resistant vortex-spun core-spun yarns prepared in the examples and comparative examples were soaked in physiological saline for 48 hours to obtain the leachate. The corresponding apoptosis rate was detected by flow cytometry and Annexin V-FITC apoptosis detection kit. The results are shown in Table 1.

[0057] Table 1. Results of cell apoptosis rate

[0058]

[0059] As can be seen from the results in Table 1, Examples 1-3 of the present invention have similar apoptosis rates compared to the control group, indicating that the modification methods involved in Examples 1-3 of the present invention do not produce significant toxicity to oxidized cotton fibers. It should be noted that Comparative Example 3, which does not contain zinc, has a significantly increased apoptosis rate, indicating that the presence of zinc ions in the core yarn enhances cell activity. Combining Comparative Examples 1-2 and Examples 1-3, it is shown that modifying the wrapped yarn by changing the ratio of protamine and octadecyltrimethylammonium chloride can reduce cytotoxicity.

[0060] The antibacterial properties of the abrasion-resistant vortex-spun core-spun yarns prepared in the examples and comparative examples were tested according to the standard GB / T 20944.1-2007 "Evaluation of antibacterial properties of textiles - Part 1: Agar plate diffusion method". The results are shown in Table 2.

[0061] Table 2 Antibacterial performance results

[0062]

[0063] As can be seen from the test results in Table 1, the abrasion-resistant vortex-spun core-spun yarns of Examples 1-3 of this invention have excellent antibacterial properties, while the antibacterial performance of Comparative Example 3, which contains zinc-free core yarn, is the worst. This may be because, compared to protamine sulfate and octadecyltrimethylammonium chloride, Zn... 2+ Interactions with negatively charged residues on the bacterial cell surface lead to widespread changes in cell surface and permeability, resulting in leakage of intracellular substances; in the presence of Zn 2+ In the presence of protamine and octadecyltrimethylammonium chloride, protamine and octadecyltrimethylammonium chloride have a better effect on bacteria, further enhancing antibacterial properties.

[0064] The abrasion resistance results were obtained using a Zweigle G552 yarn abrasion tester with a friction speed of 60 times / min, a friction depth of 40mm, a weight of 20g, and 1500 g wet sandpaper as the abrasion material. The results are shown in Table 3.

[0065] Table 3 Abrasion resistance results

[0066]

[0067] As can be seen from the test results in Table 3, the method of the present invention can improve the abrasion resistance of core-spun yarn.

[0068] In summary, this invention uses zinc-modified cotton yarn as the core yarn and protamine and octadecyltrimethylammonium chloride-modified cotton yarn as the wrapping yarn, and prepares wear-resistant vortex-spun core-spun yarn using vortex spinning. Because zinc, protamine and octadecyltrimethylammonium chloride have a stable binding effect, the wear resistance and antibacterial properties of the core-spun yarn product are guaranteed. The cytotoxicity test results also show that the core-spun yarn product of this invention will not produce significant toxicity to organisms.

[0069] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wear-resistant vortex-spun core-spun yarn, characterized in that: It includes a core yarn and a wrapping yarn, wherein the mass of the core yarn is 30% to 50% of the mass of the wrapping yarn; The core yarn is zinc-modified cotton yarn obtained by vortex spinning of zinc-modified cotton fibers. The method for preparing the zinc-modified cotton fiber is as follows: by weight, 5-20 parts of oxidized cotton fiber are immersed in 100-150 parts of soluble zinc salt aqueous solution at 40-60℃ for 0.5-2 hours, and then taken out and dried to obtain zinc-modified cotton fiber. The wrapping yarn is an antibacterial and abrasion-resistant modified cotton yarn obtained by vortex spinning of antibacterial and abrasion-resistant modified cotton fibers. The method for preparing the antibacterial and abrasion-resistant modified cotton fiber is as follows: by weight, 5-20 parts of oxidized cotton fiber are immersed in 100-150 parts of antibacterial and abrasion-resistant aqueous solution at 20-30℃, and stirring is maintained for 0.5-3 hours. Then, the fiber is taken out, washed with water, and dried to obtain antibacterial and abrasion-resistant modified cotton fiber. The antibacterial wear-resistant agent is composed of protamine sulfate and quaternary ammonium salt in a mass ratio of 1~5:1~2; The quaternary ammonium salt is octadecyltrimethylammonium chloride.

2. The wear-resistant vortex-spun core-spun yarn according to claim 1, characterized in that: The concentration of the soluble zinc salt aqueous solution is 0.001~0.005 mol / L.

3. The wear-resistant vortex-spun core-spun yarn according to claim 1, characterized in that: The mass concentration of the antibacterial and wear-resistant agent aqueous solution is 1% to 5%.

4. The wear-resistant vortex-spun core-spun yarn according to claim 1, characterized in that: The stirring speed is 50~150 rpm.

5. The wear-resistant vortex-spun core-spun yarn according to claim 1, characterized in that: The preparation method of the oxidized cotton fiber is as follows: by mass, under light-protected conditions at 20-30°C, 10-20 parts of cotton fiber are immersed in 150-300 parts of sodium periodate aqueous solution with a molar concentration of 0.01-0.03 mol / L and stirred at 100-200 rpm for 1-5 hours; then, the treated cotton fiber is rinsed with water and soaked in 150-300 parts of ethylene glycol aqueous solution with a molar concentration of 0.005-0.01 mol / L for 0.5-1 hours, then taken out, washed with water, and dried to obtain oxidized cotton fiber.

6. The method for preparing abrasion-resistant vortex-spun core-spun yarn as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Zinc-modified cotton fibers are processed through opening, cleaning, carding, drawing, and vortex spinning to obtain zinc-modified cotton yarn. Antibacterial and abrasion-resistant modified cotton fibers are processed through opening, carding, drawing, and vortex spinning to obtain antibacterial and abrasion-resistant modified cotton yarn; Zinc-modified cotton yarn and antibacterial abrasion-resistant agent-modified cotton yarn were vortex-spun to obtain abrasion-resistant vortex-spun core-spun yarn.

7. The method for preparing wear-resistant vortex-spun core-spun yarn according to claim 6, characterized in that, The process parameters for the drawing process are as follows: first drawing spacing 11×9×21, total draft ratio 6~8, back zone draft ratio 1.86; second drawing spacing 11×9×21, total draft ratio 6~8; third drawing spacing 8×18, back zone draft ratio 1~2, yielding a finished sliver weight of 20~21g / 5m.

8. The method for preparing wear-resistant vortex-spun core-spun yarn according to claim 7, characterized in that, The process parameters for the vortex spinning are: spinning speed 430~460m / min, total draft ratio 220~230 times, and roller spacing 41mm×43mm.

Images