Preparation method of soft skin-friendly antibacterial towel

Abstract

The invention provides a preparation method of a soft skin-friendly antibacterial towel, and belongs to the technical field of textile materials. The preparation method comprises the following steps: preparing antibacterial nano-silver fibers by taking polyamide fibers as a substrate and N, N-dimethylacetamide as an antibacterial active reducing agent by utilizing a chemical reduction method, blending the antibacterial nano-silver fibers and cotton fibers according to a mass ratio of 15: 85 to prepare raw material blended yarns, carrying out double-sided weaving on the raw material blended yarns to obtain a towel blank, adding a finishing auxiliary agent, washing, and drying to obtain the antibacterial nano-silver towel. And adding a softening auxiliary agent, boiling in water, discharging cloth, dehydrating, scutching, drying and shaping to obtain the soft skin-friendly antibacterial towel. The soft skin-friendly antibacterial towel is simple and efficient in production process, not only has traditional sterilization, bacteriostasis and cleaning functions, but also can accelerate blood circulation of the face, is smooth in hand feeling, does not mildew or stink under the humid and warm conditions, and is long in service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile materials, and particularly relates to a method for preparing a soft, skin-friendly and antibacterial towel. Background Art

[0002] Most of the towels used in reality only have the function of wiping, and are insufficient in terms of softness and long-lasting antibacterial properties. Nowadays, people's requirements for daily necessities are becoming more and more strict, and the demand for high-quality towels, especially those with antibacterial and health-care properties, is increasing day by day. At present, the research and development of soft antibacterial towels in the existing market has begun to emerge.

[0003] The preparation methods of towels with long-lasting antibacterial properties in the prior art can be divided into two categories. One is to coat fibers with polymer substances having antibacterial properties or to use fibers with antibacterial properties to make antibacterial towels; the second is to make the antibacterial fabric layer and the water-absorbing layer combine into a multi-layer structure through a special weaving method to achieve a certain antibacterial property. However, the polymer substances with antibacterial properties currently used require a large number of technological processes for the raw material fibers, the technological process is long, and the added microcapsule finishing agent contains many high-molecular compounds, which have an impact on the human skin in the long term. Secondly, the fibers with antibacterial properties currently used, such as bamboo fibers, have limited anti-mildew effects, and the coils on bamboo fiber towels are easy to fall off, and the instantaneous water absorption gradually decreases after use. Moreover, the connection points of multi-layer fabrics are relatively weak and easy to break, resulting in damage to the towel structure layer and high requirements for the production equipment. Therefore, the present invention proposes a new type of soft, skin-friendly and long-lasting antibacterial towel. Summary of the Invention

[0004] To solve the above technical problems, the present invention proposes a method for preparing a soft, skin-friendly and antibacterial towel. Antibacterial nano-silver fibers are prepared by a chemical reduction method and are blended with cotton fibers to form a towel. The prepared towel not only has the traditional bactericidal and antibacterial and cleaning functions, but also has the effects of improving blood circulation, promoting metabolism and beautifying the skin. Moreover, the prepared towel has a smooth, soft and comfortable hand feeling, is moisture-absorbing and breathable, and has a more comfortable feeling. It is a completely new type of antibacterial, soft and skin-friendly towel.

[0005] The present invention proposes a method for preparing antibacterial nano-silver fibers. Using polyamide fibers as a substrate, by a chemical reduction method, with N,N-dimethylacetamide (DMAc) as an antibacterial active reducing agent, in the presence of a dispersant polyvinylpyrrolidone (PVP-K30), silver nitrate is reduced. After silver ions are reduced to silver atoms, they will further aggregate into oligomeric clusters, thereby forming silver nanoparticles. The silver nanoparticles are combined with the polyamide fibers through physical adsorption to obtain antibacterial nano-silver fibers.

[0006] Further, it includes the following steps: Immerse polyamide fiber into silver nitrate solution, add N,N-dimethylacetamide (DMAc) and polyvinylpyrrolidone (PVP-K30), mix and stir, soak for 60 min, rinse with water 1 - 3 times, and dry at room temperature to obtain the antibacterial nano-silver fiber.

[0007] Furthermore, the concentration of the silver nitrate solution is 10 - 20 g / L, and the volume ratio of N,N-dimethylacetamide to the silver nitrate solution is 1∶2.

[0008] The present invention also provides an antibacterial nano-silver fiber prepared by the above preparation method.

[0009] The antibacterial nano-silver fiber prepared by the present invention can be completely degraded and has good biocompatibility. The advantages of preparing the antibacterial nano-silver fiber by the chemical reduction method are that the process of the chemical reduction method is easy to control, the process is short, and it has high economic benefits.

[0010] The present invention also provides a soft, skin-friendly antibacterial towel, which is blended by the above antibacterial nano-silver fiber and cotton fiber in a mass ratio of (10 - 20)∶(80 - 90). As the addition amount of the antibacterial nano-fiber increases, the antibacterial effect will continue to enhance and the effect will also be more lasting.

[0011] The present invention also provides a preparation method of the soft, skin-friendly antibacterial towel, including the following steps:

[0012] Blend the antibacterial nano-silver fiber and cotton fiber to obtain a raw material blended yarn, input the set pattern in a jacquard loom, double-face weave the raw material blended yarn to weave a towel blank, immerse the towel blank in the hot water tank of a combined desizing, scouring and bleaching machine for water washing, then add a softening agent and boil, take out the cloth, dehydrate in a dehydrator for 20 min, open the width, and dry in a dryer at 120°C for 20 min to obtain the soft, skin-friendly antibacterial towel.

[0013] Further, the main feature of the double-face weaving is that different colors or structures are presented on both sides, the surface layer is a hair texture, and the inner layer is a ground texture, including forms such as weft double, changing satin weave, and concave-convex texture. Weaving with a double-face changing satin weave can wrap the silver fiber with cotton fiber 360 degrees, making the long-staple cotton soft and fluffy, thickening the flexibility of the terry fiber, making the hand feel softer, and at the same time having the characteristics of not being easy to shed hair and pilling and having long-lasting strong water absorption.

[0014] Further, the method for preparing the raw material blended yarn is as follows: The antibacterial nano silver fiber and cotton fiber are piled up and mixed in a trough, and then carding, combing, drawing, roving spinning, fine spinning, winding, doubling, and doubling twisting are carried out to obtain the raw material blended yarn. In the roving spinning process, the roving twist coefficient is 100, and the roving spindle speed is 600 revolutions per minute. In the fine spinning process, the fine spinning twist coefficient is 800 - 1000, and the fine spinning spindle speed is 8000 - 10000 revolutions per minute.

[0015] Further, the bath ratio of the water washing is 1∶30. The towel blank is first washed with water at 95°C for 20 - 30 minutes, and then the water temperature is reduced to 90°C and washed for 5 minutes.

[0016] Further, the towel blank after water washing is boiled in water at 90°C for 40 minutes, and then a softening aid is added and boiled for another 15 minutes.

[0017] Even further, the addition amount of the softening aid is 30 g / L. By weight, the raw materials of the softening aid include 53.0 parts of stearic acid, 9.5 parts of polyamine, 3.0 parts of crosslinking agent, 10.0 parts of emulsifier, and 24.5 parts of polyethylene glycol.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects:

[0019] (1) The present invention uses antibacterial nano silver fiber that is completely degradable and has good biocompatibility as the raw material, and the antibacterial nano silver fiber and cotton fiber are double-sided woven in a double-sided knitting form, so that the cotton fiber wraps the silver fiber 360 degrees, making the long-staple cotton soft and fluffy, and thickening the flexibility of the loop fiber, so that it has the characteristics of not being easy to shed hair and pilling, and long-term strong water absorption at the same time.

[0020] (2) The towel production process of the present invention is simple and efficient, and its antibacterial ability far exceeds that of ordinary towels on the market. It not only has the traditional functions of sterilization, antibacterial, and cleaning. Moreover, due to the presence of nano silver, when the soft, skin-friendly, and antibacterial towel is used to wipe the face, a micro current will be generated, which can accelerate the blood circulation of the face, dredge the follicular sebaceous gland ducts, provide a basis for the smooth introduction and deep introduction of nutrients and moisture, is beneficial to metabolism, and the obtained towel has a smooth, soft, and comfortable hand feeling, is moisture-absorbing and breathable, and has a more comfortable feeling. It is a new type of antibacterial, skin-friendly, and soft towel, and it will not mildew or stink under humid and warm conditions. To a certain extent, this can reduce the number of towel washes, extend the service life of the towel, and has high environmental protection value and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the double-sided variable satin weave in Embodiment 1 of the present invention, where 1 is the weft yarn, 2 is the pile warp, 3 is the lower pile rod, and 4 is the upper pile rod;

[0023] Figure 2 It is the weaving diagram of the double-sided variable satin weave of the towel in Embodiment 1 of the present invention;

[0024] Figure 3 It is the weaving diagram of the weft double weave in Embodiment 3 of the present invention. Detailed implementation manners

[0025] Now, various exemplary implementation manners of the present invention will be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, characteristics, and implementation schemes of the present invention.

[0026] It should be understood that the terms used in the present invention are only for describing specific implementation manners and are not used to limit the present invention. Additionally, for the numerical ranges in the present invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each intermediate value within any stated value or stated range, as well as each smaller range between any other stated value or intermediate value within the stated range, is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded from the range.

[0027] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein can also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In case of conflict with any incorporated document, the content of this specification shall prevail.

[0028] Without departing from the scope or spirit of the present invention, various improvements and changes can be made to the specific implementation manners of the present invention specification, which are obvious to those skilled in the art. Other implementation manners obtained from the present invention specification are also obvious to those skilled in the art. The present invention specification and embodiments are only exemplary.

[0029] Regarding the terms "comprising", "including", "having", "containing", etc. used herein, they are all open-ended terms, meaning including but not limited to.

[0030] The present invention provides a method for preparing antibacterial silver nanowire fibers. Using polyamide fibers as the substrate and the chemical reduction method, with N,N-dimethylacetamide (DMAc) as the bacteriostatic active reducing agent, in the presence of the dispersant polyvinylpyrrolidone (PVP-K30), silver nitrate is reduced. After the silver ions are reduced to silver atoms, they will further aggregate into oligomeric clusters, thus forming silver nanoparticles. The silver nanoparticles are combined with the polyamide fibers through physical adsorption to obtain the antibacterial silver nanowire fibers. Specifically, the method includes the following steps: Immerse the polyamide fibers in a silver nitrate solution, add N,N-dimethylacetamide (DMAc) and polyvinylpyrrolidone (PVP-K30), mix and stir, soak for 60 minutes, rinse with water 1-3 times, and dry at room temperature to obtain the antibacterial silver nanowire fibers.

[0031] In the embodiment of the present invention, the concentration of the silver nitrate solution is 10-20 g / L, and the volume ratio of N,N-dimethylacetamide to the silver nitrate solution is 1:2.

[0032] The embodiment of the present invention also provides a soft, skin-friendly antibacterial towel, which is spun from the above-mentioned antibacterial silver nanowire fibers and cotton fibers in a mass ratio of (10-20):(80-90), preferably 15:85. Its preparation method includes the following steps:

[0033] Blend the antibacterial silver nanowire fibers and cotton fibers to obtain a raw material blended yarn. Input the set pattern into the jacquard loom, double-knit the raw material blended yarn to weave a towel blank. Immerse the towel blank in the hot water tank of a desizing, scouring, and bleaching combined machine for water washing, then add a softening agent and boil, take out the cloth, dehydrate in a dehydrator for 20 minutes, open the width, and dry in a dryer at 120°C for 20 minutes to obtain the soft, skin-friendly antibacterial towel.

[0034] In the embodiment of the present invention, the main feature of the double-knitting is that different colors or structures are presented on both sides. The surface layer is a hair texture, and the inner layer is a ground texture, including forms such as weft double, changing satin weave, and concave-convex texture. By using the double-sided changing satin weave, the cotton fibers can wrap the silver fibers 360 degrees, making the long-staple cotton soft and fluffy, thickening the flexibility of the loop fibers, making the hand feel softer, and at the same time having the characteristics of not being easy to shed hair and pilling, and long-lasting strong water absorption.

[0035] In the embodiment of the present invention, the preparation method of the raw material blended yarn is as follows: The antibacterial nano silver fiber and cotton fiber are piled up and mixed in a large amount on the trough, and then carding, combing, drawing, roving spinning, fine spinning, winding, doubling and twisting are carried out to obtain the raw material blended yarn. In the roving spinning process, the roving twist factor is 100 and the roving spindle speed is 600 r / min. In the fine spinning process, the fine yarn twist factor is 800 - 1000 and the fine yarn spindle speed is 8000 - 10000 r / min. The purpose of limiting the twist factor and spindle speed in the roving spinning and fine spinning processes is to better control the count of the antibacterial silver fiber yarn formed.

[0036] In the embodiment of the present invention, the bath ratio of the water washing is 1∶30. The towel grey is first washed with water at 95°C for 20 - 30 min, and then the water temperature is reduced to 90°C and washed for 5 min. The water washing can remove the surface floating hairs of the towel grey, facilitating subsequent finishing.

[0037] In the embodiment of the present invention, the towel grey after water washing is boiled with water at 90°C for 40 min, and then a softening auxiliary agent is added and boiled for another 15 min. The addition amount of the softening auxiliary agent is 30 g / L.

[0038] In a specific embodiment of the present invention, by weight, the raw materials of the softening auxiliary agent include 53.0 parts of stearic acid, 9.5 parts of polyamine, 3.0 parts of crosslinking agent, 10.0 parts of emulsifier and 24.5 parts of polyethylene glycol. The above raw materials are weighed by weight and directly mixed evenly to obtain it. The crosslinking agent used is glutaraldehyde, and its function is to form crosslinks with the hydroxyl groups on the cotton fiber, enabling the softening auxiliary agent to be adsorbed on the towel. Adding it together with stearic acid, polyamine, emulsifier (all purchased from Sinopharm Chemical Reagent Co., Ltd.) and polyethylene glycol can reduce the reaction time and shorten the experimental process.

[0039] All raw materials used in the embodiments of the present invention are obtained through commercial purchase. Unless otherwise specified, the preparation processes in the embodiments are conventional methods in this field.

[0040] Unless otherwise specified, all "parts" used in the embodiments of the present invention are "parts by weight".

[0041] In the embodiments of the present invention, the room temperature refers to "25 ± 2°C".

[0042] The technical solution of the present invention is further described below through embodiments.

[0043] Example 1

[0044] (1) Immerse 20D - 200D polyamide fiber raw materials in a silver nitrate solution with a liquid - solid ratio of 1 g∶30 mL and a concentration of 10 g / L, and add N,N - dimethylacetamide (DMAc) with a concentration of 5 g / L and polyvinylpyrrolidone (PVP - K30) with a concentration of 2 g / L, and mix and stir. The volume ratio of N,N - dimethylacetamide to the silver nitrate solution is 1∶2, and the volume ratio of PVP - K30 to the silver nitrate solution is 1∶5. Using N,N - dimethylacetamide (DMAc) as the antibacterial active reducing agent, in the presence of polyvinylpyrrolidone (PVP - K30), silver nitrate is reduced. After silver ions are reduced to silver atoms, they will further aggregate into oligomeric clusters, thus forming silver nanoparticles, obtaining a stable silver nanoparticle solution. The polyamide fiber and silver nanoparticles are combined through physical adsorption. Immerse for 60 min, rinse with water 3 times, and dry at room temperature to obtain antibacterial silver - nanocomposite fibers;

[0045] (2) Mix the antibacterial silver - nanocomposite fibers and cotton fibers in a mass ratio of 15∶85 in a trough in a large - pile manner, and then carry out carding, combing, drawing, spinning roving (the roving twist factor is 100, and the roving spindle speed is 600 r / min), spinning yarn (the yarn twist factor is 1000, and the yarn spindle speed is 10000 r / min), winding, doubling, and twisting to obtain the raw material mixed yarn. Input the set pattern in a jacquard loom, and weave the raw material mixed yarn according to the double - faced changing satin weave. The schematic diagram is shown in Figure 1 , where 1 - weft yarn, 2 - pile warp, 3 - lower pile rod, 4 - upper pile rod), and weave into a towel gray fabric (the towel double - faced weaving pattern diagram is shown in Figure 2 ). Immerse the towel gray fabric in the hot - water tank of a desizing, scouring, and bleaching combined machine for water washing, control the bath ratio to 1:30. First, wash the towel gray fabric with 95℃ water for 3 min, then lower the water temperature to 90℃ and wash for 5 min. After water washing, boil the towel gray fabric in 90℃ water for 40 min, then add a softening agent (the addition amount is 30 g / L) and continue boiling for 15 min. Take out the fabric, dehydrate in a dehydrator for 20 min, open the width, and dry in a dryer at 120℃ for 20 min to obtain a soft, skin - friendly, and antibacterial towel.

[0046] Example 2

[0047] (1) Immerse 20D - 200D polyamide fiber raw materials in a silver nitrate solution with a liquid - solid ratio of 1 g∶30 mL and a concentration of 10 g / L. Add N,N - dimethylacetamide (DMAc) with a concentration of 5 g / L and polyvinylpyrrolidone (PVP - K30) with a concentration of 2 g / L, and mix and stir. The volume ratio of N,N - dimethylacetamide to the silver nitrate solution is 1∶2, and the volume ratio of PVP - K30 to the silver nitrate solution is 1∶5. Using N,N - dimethylacetamide (DMAc) as the antibacterial active reducing agent, in the presence of polyvinylpyrrolidone (PVP - K30), silver nitrate is reduced. After silver ions are reduced to silver atoms, they will further aggregate into oligomeric clusters, thus forming silver nanoparticles, obtaining a stable silver nanoparticle solution. The polyamide fiber and silver nanoparticles are combined through physical adsorption. Immerse for 60 min, rinse with water 3 times, and dry at room temperature to obtain antibacterial silver nano - fibers;

[0048] (2) Mix the antibacterial silver nano - fibers and cotton fibers in a large - scale stack in the trough according to a weight ratio of 15∶85, and then carry out carding, combing, drawing, spinning roving (the roving twist factor is 100, and the roving spindle speed is 600 r / min), spinning yarn (the yarn twist factor is 800, and the yarn spindle speed is 10000 r / min), winding, doubling, and twisting to obtain the raw material blended yarn. Input the set pattern in the jacquard loom and double - face weave the raw material blended yarn. The weaving method is the same as that in Example 1. Immerse the towel gray fabric in the hot water tank of the desizing, scouring, and bleaching combined machine for water washing, control the bath ratio to 1:30. First, wash the towel gray fabric with water at 95°C for 30 min, then lower the water temperature to 90°C and wash for 5 min. After water washing, boil the towel gray fabric in water at 90°C for 40 min, then add a softening agent (the addition amount is 30 g / L) and continue boiling for 15 min. Take out the fabric, dehydrate in a dehydrator for 20 min, open the width, and dry in a dryer at 120°C for 20 min to obtain a soft, skin - friendly, antibacterial towel.

[0049] Example 3

[0050] Same as Example 1, the only difference is that it is woven according to the weft - backed double - layer weave. The structural schematic diagram is shown in Figure 3 , the surface and backing wefts overlap in the fabric, and both sides show the weft - faced effect.

[0051] Comparative Example 1

[0052] Commercially available ordinary towels.

[0053] Comparative Example 2

[0054] Same as Example 1, with the only difference being that the preparation method of the antibacterial silver nanoparticles fiber is changed. Polyvinylpyrrolidone dispersant is not used. Specifically: 20D - 200D nylon fiber raw materials are immersed in a silver nitrate solution with a concentration of 10 g / L according to a liquid - solid ratio of 1 g∶30 mL, and N,N - dimethylacetamide (DMAc) with a concentration of 5 g / L is added and mixed with stirring. The volume ratio of N,N - dimethylacetamide to the silver nitrate solution is 1:2. After impregnation for 60 min, it is rinsed with water three times and dried at room temperature. In this state, silver particles will aggregate, resulting in unevenness.

[0055] Comparative Example 3

[0056] Same as Example 1, with the only difference being that the antibacterial silver nanoparticles fiber and cotton fiber are mixed in a large pile in the trough according to a weight ratio of 5∶95.

[0057] Comparative Example 4

[0058] Same as Example 1, with the only difference being that the roving twist factor is 80, the roving spindle speed is 500 r / min, the yarn twist factor is 600, and the yarn spindle speed is 8000 r / min.

[0059] Comparative Example 5

[0060] Same as Example 1, with the only difference being that the towel blank is immersed in the hot water tank of the desizing, scouring, and bleaching combined machine, controlling the bath ratio to be 1:50. The towel blank is first washed with water at 100 °C for 20 min, and then the water temperature is reduced to 90 °C and washed for 5 min.

[0061] Performance Test

[0062] I. Antibacterial Performance

[0063] The antibacterial performance of the soft skin - friendly antibacterial towels prepared in the examples and comparative examples was detected. The antibacterial property was qualitatively measured according to the parallel inoculation method. The specific method is as follows:

[0064] (1) Five vertical bars are cut on the test sample of 30 mm by 50 mm in the length direction, and the width decreases from 8 mm to 4 mm.

[0065] (2) Then, a bacterium culture solution (including Escherichia coli, Staphylococcus aureus, and Candida albicans) is taken with a bacterium - picking loop and five parallel lines with a length of 7.5 cm are drawn on the culture medium at an interval of 1 cm.

[0066] (3) The test cloth sample is attached to the surface of the agar, in a cross - shaped pattern with the parallel lines, and cultured at 37 °C for 18 - 24 h.

[0067] (4) Observe the position where the bacterial reproduction is interrupted along the drawn line. The size of the clean area indicates the antibacterial activity of the test cloth sample.

[0068] The experimental results are shown in Table 1.

[0069] Table 1 Antibacterial rate measurement results of towels prepared in the examples and comparative examples

[0070]

[0071]

[0072] As can be seen from Table 1, there are significant differences in the number of colonies of the towel samples prepared in the control group and Example 1 after 24 hours. The towel prepared in Example 1 can achieve an inhibitory effect of more than 99.9% on Escherichia coli, Staphylococcus aureus, and Candida albicans, showing excellent antibacterial performance.

[0073] II. Human safety experiment

[0074] According to national standards, the towel sample prepared in Example 1 was subjected to a skin irritation test (GB / T16886.2-2011, GB / T16886.10-2017, GB / T16886.12-2017), an acute systemic toxicity test (GB / T16886.2-2011, GB / T16886.12-2017, GB / T16886.11-2011), and the experimental results are shown in Tables 2-7.

[0075] Table 2 Test results of the towel in Example 1

[0076]

[0077] Table 3 Test results of the towel in Example 2

[0078]

[0079] Table 4 Test results of the towel in Comparative Example 1

[0080]

[0081] Table 5 Test results of the towel in Comparative Example 2

[0082]

[0083] Table 6 Test results of the towel in Comparative Example 3

[0084]

[0085] Table 7 Test results of the towel in Comparative Example 4

[0086]

[0087] As can be seen from Table 2, the cleaning area of the towel products prepared in the examples is large after testing. The bacteria reproduction area only accounts for 1% of the sample, and there is no peculiar smell or potential acute systemic toxicity. It is confirmed that the antibacterial towels prepared in the examples have antibacterial effects, with an antibacterial rate of over 99.9%. Moreover, they have no irritating effect on the human skin and no systemic toxicity, indicating that the towel components of the present invention are safe and healthy.

[0088] III. Mildew and odor experiments

[0089] According to the national standard (GB18401-2010), odor tests were conducted on the towel samples prepared in Examples 1 and 2 and Comparative Examples 1 and 2. The results are shown in Tables 8-11.

[0090] Table 8 Test results of the towel in Example 1

[0091]

[0092] Table 9 Test results of the towel in Example 2

[0093]

[0094] Table 10 Test results of the towel in Comparative Example 1

[0095]

[0096] Table 11 Test results of the towel in Comparative Example 2

[0097]

[0098] Through comparison, it is found that no peculiar smell is generated in the examples. This is because the presence of silver particles can kill the bacteria that produce peculiar smells, so that mildew and odor will not occur even under humid and warm conditions. To a certain extent, this can reduce the number of towel washings and extend the service life of the towel.

[0099] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A preparation method of antibacterial nano silver fibers, characterized in that, Using nylon fiber as the substrate and silver nitrate solution as the substrate, by means of chemical reduction method, with N,N-dimethylacetamide as the antibacterial active reducing agent, the silver ions in the silver nitrate solution are reduced to silver atoms to form silver nanoparticles, and the silver nanoparticles are combined with the nylon fiber through physical adsorption to obtain antibacterial nano silver fiber.

2. The preparation method of the antibacterial silver nanowire fiber according to claim 1, characterized in that, It includes the following steps: Immerse the nylon fiber in the silver nitrate solution, add N,N-dimethylacetamide and polyvinylpyrrolidone, mix and stir, impregnate, rinse and dry to obtain the antibacterial nano silver fiber.

3. The preparation method of the antibacterial silver nano fiber according to claim 2, characterized in that, The concentration of the silver nitrate solution is 10-20 g / L, and the volume ratio of N,N-dimethylacetamide to the silver nitrate solution is 1:

2.

4. An antibacterial nano silver fiber prepared by the preparation method according to any one of claims 1-3.

5. A soft, skin-friendly and antibacterial towel, characterized in that, It is blended by the antibacterial nano silver fiber according to claim 4 and cotton fiber in a mass ratio of (10-20):(80-90).

6. A method for preparing the soft, skin-friendly and antibacterial towel according to claim 5, characterized in that, It includes the following steps: Blend the antibacterial nano silver fiber and cotton fiber to obtain a raw material blended yarn, double-weave the raw material blended yarn to weave a towel blank, wash the towel blank with water, add a softening aid and boil it, take out the cloth, dehydrate, open the width, and dry and shape it to obtain the soft, skin-friendly and antibacterial towel.

7. The preparation method of the soft, skin-friendly and antibacterial towel according to claim 6, characterized in that, The preparation method of the raw material blended yarn is: card, comb, draw, spin roving, spin fine yarn, wind the bobbin, draw together, and double-twist the antibacterial nano silver fiber and cotton fiber to obtain the raw material blended yarn. In the roving spinning process, the roving twist factor is 100 and the roving spindle speed is 600 revolutions / min. In the fine spinning process, the fine yarn twist factor is 800-1000 and the fine yarn spindle speed is 8000-10000 revolutions / min.

8. The preparation method of the soft, skin-friendly and antibacterial towel according to claim 6, characterized in that, The bath ratio of the water washing is 1:

30. First, wash the towel blank with water at 95°C for 20-30 min, and then lower the water temperature to 90°C and wash for 5 min.

9. The preparation method of the soft, skin-friendly and antibacterial towel according to claim 6, wherein, The towel blank after water washing is boiled in water at 90°C for 40 min, and then continue to boil for 15 min after adding the softening aid.

10. The preparation method of the soft, skin-friendly and antibacterial towel according to claim 7, characterized in that, The addition amount of the softening aid is 30 g / L. By weight, the raw materials of the softening aid include 53.0 parts of stearic acid, 9.5 parts of polyamine, 3.0 parts of cross-linking agent, 10.0 parts of emulsifier and 24.5 parts of polyethylene glycol.

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