Bacteriostatic and deodorant fabric and preparation process thereof

Abstract

The application belongs to the technical field of functional fibers, and provides a bacteriostatic and odor-removing fabric and a preparation process thereof. The process comprises the following steps: loading amino guanidine salt on a porous carrier to prepare an odor remover; taking the odor remover, a lubricant, a dispersant, an antibacterial agent and a base as raw materials, granulating and preparing a functional master batch; blending and melt spinning the functional master batch and polypropylene chips to obtain a composite fiber; and mixing the composite fiber with cotton fibers or viscose fibers after heat treatment in a relaxed state to obtain the bacteriostatic and odor-removing fabric. The preparation process is simple, easy to control, low in energy consumption and cost, the prepared fabric has long-acting bacteriostatic and odor-removing performance, and the fabric has good mechanical properties.

Description

Technical Field

[0001] This application relates to the field of functional fiber technology, and in particular to an antibacterial and deodorizing fabric and its preparation process. Background Technology

[0002] Textiles, as essential functional products for human life, are highly susceptible to microbial contamination due to their microporous structure. Combined with the suitable temperature and humidity of the human body surface, and secretions such as oils and sweat, these conditions create favorable environments for the reproduction and growth of microorganisms. These bacteria and other pathogenic microorganisms not only harm the body but also decompose bodily secretions, producing foul odors.

[0003] With the rapid development of modern textile science and technology and the increasing demand for functionality and comfort in textiles, textiles with antibacterial and deodorizing properties are often more favored by consumers.

[0004] To eliminate odors such as sweat, body odor, excrement odor, smoke odor, and odor associated with the elderly from the human body and the air, researchers have developed a variety of deodorizing fibers that remove odors through ion exchange, chemical reactions, physical adsorption, and odor masking.

[0005] For example, patent application CN118166445A discloses an antibacterial and deodorizing coffee carbon fiber fabric and its preparation method. The method involves first carbonizing and then oxidizing coffee grounds, followed by loading with phytic acid to obtain modified oxidized coffee carbon; reacting 1,3-diaminoguanidine hydrochloride and 1,4-diamino-2-butene to obtain guanidine salt oligomers; reacting the guanidine salt oligomers with dimethyl 2-(4-nitrophenyl)malonate to obtain polyamide; reacting 2,4-dihydroxybenzophenone with 3-chloro-1-propanethiol to obtain 2-hydroxy-4-(3-mercaptopropoxy)benzophenone; reacting the polyamide sequentially with 2-hydroxy-4-(3-mercaptopropoxy)benzophenone and hydrogen to obtain modified polyamide; formulating the modified polyamide and modified oxidized coffee carbon into a fiber spinning solution, and then electrospinning to obtain antibacterial and deodorizing coffee carbon fiber; finally, weaving it into an antibacterial and deodorizing coffee carbon fiber fabric.

[0006] For example, patent CN113784786B discloses a manufacturing method for a deodorizing processing liquid containing a deodorizing agent and a deodorizing product using the same. The method indicates that hydrazine compounds such as adipic acid dihydrazide, carbamate dihydrazide, succinate dihydrazide, and oxalate dihydrazide, as well as aminoguanidine salts such as aminoguanidine hydrochloride, aminoguanidine sulfate, and aminoguanidine bicarbonate, can be used as deodorizing agents for aldehyde gases to remove odorous gases such as formaldehyde, acetaldehyde, and nonenal.

[0007] However, the above methods either have complex and costly preparation processes, or they do not clearly define the impact of deodorants on the mechanical properties of textile fabrics, nor do they clarify whether they have long-lasting deodorizing performance.

[0008] Therefore, a simpler and more controllable preparation method is needed to prepare textile fabrics with long-lasting antibacterial and deodorizing properties, which is conducive to industrial production. Summary of the Invention

[0009] In view of the shortcomings of the prior art, the present invention provides an antibacterial and deodorizing fabric and its preparation process to solve the problems of complex preparation processes of existing antibacterial and deodorizing textiles and certain negative impacts on the mechanical properties of the fabric.

[0010] To achieve the above and related objectives, the present invention adopts the following technical solution:

[0011] The first aspect of this invention provides a process for preparing an antibacterial and deodorizing fabric, comprising the following steps:

[0012] (1) An aminoguanidine salt was loaded onto a porous support to prepare a deodorant;

[0013] (2) Using deodorant, lubricant, dispersant, antibacterial agent and matrix as raw materials, granulation is carried out to prepare functional masterbatch;

[0014] (3) The functional masterbatch and polypropylene chips are blended and melt-spun to obtain composite fibers, wherein the functional masterbatch and polypropylene chips are blended at a mass ratio of (0.5-5):(95-99.5).

[0015] (4) After heat treatment of the composite fiber in a relaxed state, it is blended with cotton fiber or viscose fiber to obtain antibacterial and deodorizing fabric.

[0016] In one embodiment of this application, in step (1), the aminoguanidine salt is aminoguanidine sulfate, aminoguanidine nitrate or aminoguanidine hydrochloride.

[0017] In one embodiment of this application, the porous carrier is activated carbon and / or sepiolite.

[0018] In one embodiment of this application, step (1) further includes: dissolving aminoguanidine salt in water to prepare an impregnation solution, impregnating the porous carrier in the impregnation solution to obtain a deodorant, wherein the loading rate of the porous carrier is 15-30%.

[0019] In one embodiment of this application, in step (2), the lubricant includes one or more of calcium stearate, oleic acid, fatty acid amide, silicone oil, polyester, and carboxylic acid;

[0020] And / or, the dispersant includes one or more of the following: hexenyl bis-stearamide, glyceryl monostearate, glyceryl tristearate, barium stearate, zinc stearate, calcium stearate, cadmium stearate, magnesium stearate, copper stearate, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, and polyethylene wax;

[0021] And / or, the matrix includes one or more of polyethylene, polypropylene, polyvinyl chloride, polyamide, polyester, and polyurethane;

[0022] And / or, the antibacterial agent includes one or more of nano titanium dioxide, nano zinc oxide, and nano cerium oxide.

[0023] In one embodiment of this application, step (2) further includes: blending and drying the deodorizer, lubricant, dispersant, antibacterial agent, and matrix, followed by screw extrusion melting, extrusion, cooling, stretching, pelletizing, and drying to obtain a functional masterbatch, wherein,

[0024] The mass ratio of deodorant, lubricant, dispersant, antibacterial agent and matrix is ​​(20-30): (0.5-3): (0.5-3): (1-2): (62-78).

[0025] In one embodiment of this application, in step (3), the spinning temperature of melt spinning is 130-150°C.

[0026] In one embodiment of this application, in step (4), the heat treatment temperature is 95-100°C;

[0027] And / or, the heat treatment time is 15 to 20 minutes.

[0028] In one embodiment of this application, after the composite fiber is heat-treated in a relaxed state, the blending ratio of the composite fiber to cotton fiber or viscose fiber is (35-50):(50-65).

[0029] A second aspect of the present invention provides an antibacterial and deodorizing fabric, which is prepared according to the above-described preparation process.

[0030] The beneficial technical effects of this invention are as follows:

[0031] The preparation process of this invention is simple, easy to control, low in energy consumption and low in cost. The fabric prepared has long-lasting antibacterial and deodorizing properties, and good mechanical properties.

[0032] This invention uses aminoguanidine salt as a deodorizer for aldehyde gases such as 2-nonenal, and a porous carrier as a deodorizer for odorous gases such as ammonia, acetic acid, and isovaleric acid. The aminoguanidine salt is loaded onto the porous carrier via an impregnation method to prepare the deodorizer. The aminoguanidine salt of this invention can rapidly perform unidirectional chemical adsorption of aldehyde gases at room temperature and undergo a dehydration reaction with the aldehyde gases, thereby achieving the purpose of deodorization. Furthermore, the byproducts of the reaction, such as methylene amino compounds, are easily volatile and are subsequently adsorbed by the porous carrier, without causing any negative impact on the human body.

[0033] The melt spinning temperature of polypropylene fibers is typically 180±50℃, which is higher than the melting point of aminoguanidine salts. If the deodorizing agent is directly blended with polypropylene chips for melt spinning, the aminoguanidine salt will melt, thus losing its deodorizing effect. Therefore, this invention utilizes a lubricant to prepare a functional masterbatch with a cooling effect, lowering the melt spinning temperature. By controlling the amount of lubricant, the spinning temperature can be reduced by 20-30℃, thus falling below the melting point of aminoguanidine salts, ensuring that the aminoguanidine salts on the final fibers do not become ineffective. Simultaneously, this invention utilizes a dispersant to prevent the functional masterbatch from agglomerating, ensuring that the functional masterbatch is uniformly dispersed in the polypropylene chips.

[0034] Furthermore, this invention controls the blending ratio during melt spinning to ensure the final fabric has good mechanical properties. This invention also controls the blending ratio to make the prepared fabric better suited for home textile applications.

[0035] This invention also involves heat treatment of the composite fibers to promote fiber breakage, resulting in a relatively loose internal fiber structure. This further improves the fabric's breathability, promoting air circulation, reducing surface humidity, and minimizing the possibility of bacterial growth. Furthermore, by controlling the heat treatment temperature and time, this invention avoids the negative impact of pilling on the fabric.

[0036] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0037] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of the invention are merely illustrative and should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of the invention.

[0038] The present invention discloses a preparation process for an antibacterial and deodorizing fabric, comprising the following steps:

[0039] (1) Dissolve aminoguanidine salt in water to prepare an impregnation solution, and impregnate the porous carrier in the impregnation solution to obtain a deodorant, wherein the loading rate of the porous carrier is 15-30%.

[0040] In this step, the aminoguanidine salt is aminoguanidine sulfate, aminoguanidine nitrate, or aminoguanidine hydrochloride;

[0041] In this step, parameters such as impregnation solution concentration, impregnation ratio, impregnation temperature, and number of impregnations need to be adjusted according to the load rate, and no specific limits are imposed here.

[0042] (2) The deodorizer, lubricant, dispersant, antibacterial agent and matrix are mixed and dried, and then melted by screw extrusion, extruded, cooled, stretched, pelletized and dried to obtain functional masterbatch. The mass ratio of deodorizer, lubricant, dispersant, antibacterial agent and matrix is ​​(20-30): (0.5-3): (0.5-3): (1-2): (62-78).

[0043] In this step, the lubricant includes one or more of the following: calcium stearate, oleic acid, fatty acid amide, silicone oil, polyester, and carboxylic acid.

[0044] In this step, the dispersant includes one or more of the following: hexenyl bis-stearamide, glyceryl monostearate, glyceryl tristearate, barium stearate, zinc stearate, calcium stearate, cadmium stearate, magnesium stearate, copper stearate, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, and polyethylene wax.

[0045] In this step, the matrix includes one or more of polyethylene, polypropylene, polyvinyl chloride, polyamide, polyester, and polyurethane;

[0046] In this step, the antibacterial agent includes one or more of nano titanium dioxide, nano zinc oxide, and nano cerium oxide.

[0047] (3) The functional masterbatch and polypropylene chips are blended and melt-spun at a mass ratio of (0.5-5):(95-99.5) to obtain composite fibers.

[0048] In this step, the spinning temperature of melt spinning is 130-150℃;

[0049] In this step, the spinning speed is 400–600 m / min;

[0050] In this step, the draw ratio is 3 to 4 times.

[0051] (4) After heat treatment of the composite fiber in a relaxed state, it is blended with cotton fiber or viscose fiber to obtain antibacterial and deodorizing fabric.

[0052] In this step, the heat treatment temperature is 95–100℃;

[0053] In this step, the heat treatment time is 15 to 20 minutes.

[0054] In this step, after the composite fiber is heat-treated in a relaxed state, the blending ratio of it with cotton fiber or viscose fiber is (35-50):(50-65).

[0055] The present invention also provides an antibacterial and deodorizing fabric, which is prepared according to the above-described preparation process.

[0056] The present invention will be described in detail below through specific examples and embodiments. It should also be understood that the following embodiments are only for specific illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0057] Example 1

[0058] (1) Dissolve aminoguanidine hydrochloride in water to prepare an impregnation solution, and impregnate activated carbon in the impregnation solution to obtain a deodorant, wherein the loading rate of activated carbon is 15%.

[0059] (2) Deodorant, calcium stearate, hexenyl bis-stearamide, nano titanium dioxide and polyethylene are mixed and dried in a mass ratio of 20:0.5:0.5:2:77, and then melted, extruded, cooled, stretched, pelletized and dried by screw extrusion to obtain functional masterbatch.

[0060] (3) The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 0.5:99.5. The spinning temperature was 130℃, the spinning speed was 400m / min, and the draw ratio was 3 times to obtain composite fiber.

[0061] (4) The composite fiber is heat-treated in a relaxed state at a temperature of 95°C for 15 minutes.

[0062] (5) The heat-treated composite fiber and cotton fiber are blended and woven at a blending ratio of 35:65 to obtain antibacterial and deodorizing fabric.

[0063] Example 2

[0064] The difference between this embodiment and Embodiment 1 is that:

[0065] The activated carbon loading rate is 20%.

[0066] Example 3

[0067] The difference between this embodiment and Embodiment 1 is that:

[0068] The activated carbon loading rate is 25%.

[0069] Example 4

[0070] The difference between this embodiment and Embodiment 1 is that:

[0071] The activated carbon loading rate is 30%.

[0072] Example 5

[0073] The difference between this embodiment and Embodiment 1 is that:

[0074] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 1:99 to obtain composite fibers.

[0075] Example 6

[0076] The difference between this embodiment and Embodiment 1 is that:

[0077] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 2:98 to obtain composite fibers.

[0078] Example 7

[0079] The difference between this embodiment and Embodiment 1 is that:

[0080] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 3:97 to obtain composite fibers.

[0081] Example 8

[0082] The difference between this embodiment and Embodiment 1 is that:

[0083] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 3.5:96.5 to obtain composite fibers.

[0084] Example 9

[0085] The difference between this embodiment and Embodiment 1 is that:

[0086] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 4:95 to obtain composite fibers.

[0087] Example 10

[0088] The difference between this embodiment and Embodiment 1 is that:

[0089] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 4.5:95 to obtain composite fibers.

[0090] Example 11

[0091] The difference between this embodiment and Embodiment 1 is that:

[0092] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 5:99 to obtain composite fibers.

[0093] Example 12

[0094] The difference between this embodiment and Embodiment 1 is that:

[0095] The spinning temperature for melt spinning is 135℃.

[0096] Example 13

[0097] The difference between this embodiment and Embodiment 1 is that:

[0098] The spinning temperature for melt spinning is 140℃.

[0099] Example 14

[0100] The difference between this embodiment and Embodiment 1 is that:

[0101] The spinning temperature for melt spinning is 145℃.

[0102] Example 15

[0103] The difference between this embodiment and Embodiment 1 is that:

[0104] The spinning temperature for melt spinning is 150℃.

[0105] Example 16

[0106] The difference between this embodiment and Embodiment 1 is that:

[0107] Aminoguanidine hydrochloride was dissolved in water to prepare an impregnation solution. Activated carbon and sepiolite (the mass ratio of activated carbon to sepiolite was 1:1) were impregnated in the impregnation solution to obtain a deodorant, wherein the loading rate of activated carbon was 15%.

[0108] Comparative Example 1

[0109] The difference between this comparative example and Example 1 is as follows:

[0110] The activated carbon loading rate is 10%.

[0111] Comparative Example 2

[0112] The difference between this comparative example and Example 1 is as follows:

[0113] The activated carbon loading rate is 35%.

[0114] Comparative Example 3

[0115] The difference between this comparative example and Example 1 is as follows:

[0116] The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 10:90 to obtain composite fibers.

[0117] Comparative Example 4

[0118] The difference between this comparative example and Example 1 is as follows:

[0119] (3) Deodorant, hexenyl bis-stearamide, nano titanium dioxide and polyethylene are mixed and dried in a mass ratio of 20:0.5:2:77.5, and then melted, extruded, cooled, stretched, pelletized and dried by screw extrusion to obtain functional masterbatch.

[0120] (4) The functional masterbatch and polypropylene chips were blended and melt-spun at a mass ratio of 0.5:99.5. The spinning temperature was 180℃, the spinning speed was 400m / min, and the draw ratio was 3 times to obtain composite fiber.

[0121] Comparative Example 5

[0122] The difference between this comparative example and Example 1 is as follows:

[0123] No heat treatment is applied to the composite fibers.

[0124] Comparative Example 6

[0125] The difference between this comparative example and Example 1 is as follows:

[0126] Activated carbon is used as a deodorizing agent.

[0127] Performance testing

[0128] Antibacterial properties: The antibacterial properties of the fabric before and after treatment against Staphylococcus aureus ATCC6538, Escherichia coli ATCC25922 and Candida albicans ATCC10231 were determined by shaking flask method according to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Shaking method".

[0129] The antibacterial and deodorizing fabrics of Examples 1-16 and Comparative Examples 1-6 were subjected to antibacterial tests, and the results were recorded as the initial antibacterial rate. Then, the antibacterial and deodorizing fabrics prepared in the examples and the fabrics prepared in the comparative examples were washed as follows: At 25°C, the fabrics were immersed in a 20% sodium stearate solution for 5 minutes, then rinsed 5 times with clean water and dried to complete one washing cycle. The antibacterial and deodorizing fabrics prepared in the examples and the fabrics prepared in the comparative examples were washed 10 and 20 times, respectively. The antibacterial test results are shown in Tables 1 and 2.

[0130] Dissolution of antibacterial substances: The dissolution of antibacterial substances was tested according to Appendix A of GB / T 31713-2015, and the specific test method is as follows:

[0131] Examples 1 to 16 were woven with antibacterial and deodorizing fabric with specifications of 40s*40s / 144*85, and three 1.5cm*1.5cm fabric samples were cut from different parts of the fabric in each example as test samples.

[0132] Comparative examples 1 to 6 were woven with fabrics of specifications of 40s*40s / 144*85, and three 1.5cm*1.5cm fabric samples were cut from different parts of each comparative example fabric as test samples.

[0133] Three pieces of two-layer 100% polyester knitted fabric sewn together were used as wash diapers. The mass per unit area of ​​each piece of fabric was 125% of the mass per unit area of ​​the sample to be tested. Each piece of wash diapers was 30cm*30cm in size.

[0134] Each of the above-mentioned test samples, test specimens, and accompanying fabrics should be washed once according to the requirements of Appendix B and Appendix C of FZ / T 73023-2006, and then set aside for use.

[0135] Prepare several standard blank samples according to Appendix A of FZ / T 73023-2006, cut them to 1.5cm*1.5cm, wash them once according to Appendix B of FZ / T 73023-2006, and set them aside for use;

[0136] After washing, sterilize the standard blank samples, each test sample, and each test sample at 103 kPa and 121 °C for 15 min for later use.

[0137] Staphylococcus aureus (ATCC 6538), Escherichia coli (ATCC 25922), and Candida albicans (ATCC 10231) were selected as test strains. Multiple sets of antimicrobial dissolution tests were conducted on the sterilized standard blank, each test sample, and each sample to be tested. The dissolution of antimicrobial substances in each test sample and sample was determined based on the maximum inhibition zone width (D) against Staphylococcus aureus, Escherichia coli, and Candida albicans. The test results are shown in Table 3.

[0138] Odor deodorization performance of textiles: The odor deodorization performance of the antibacterial and deodorizing fabrics prepared in Examples 1-16 and the fabrics prepared in Comparative Examples 1-6 were tested according to GB / T 33610.3-2019 "Determination of odor deodorization performance of textiles", as follows:

[0139] The reagents include: ammonia, acetic acid sample gas, isovaleric acid (purity 98.0%), 2-nonenal (purity 95.0%), dilution gas (nitrogen with purity of 99.99% or higher), and ethanol (analytical grade).

[0140] Take the dimension as (50±2.5)cm 2 Four samples each of the antibacterial and deodorizing fabrics in Examples 1-16 and Comparative Examples 1-6 were used as test samples.

[0141] Gas chromatography: Prepare several 500mL glass conical flasks, half of which are used for sample testing and the other half for blank detection. The fabrics of each example and comparative example are tested separately for isovaleric acid and 2-nonenal.

[0142] Before testing, purge the conical flask with nitrogen gas at a volume greater than 5 times that of the flask, and adjust the humidity and test environment.

[0143] Accurately weigh 20g of isovaleric acid into a volumetric flask and dilute to the mark with ethanol; accurately weigh 10g of 2-nonenal into a volumetric flask and dilute to the mark with ethanol.

[0144] Each of the above-mentioned test samples was used for isovaleric acid and 2-nonenal testing, respectively. Each test sample was laid flat at the bottom of an Erlenmeyer flask, and 1000 mL of nitrogen gas was blown into the flask to expel the air inside. The flask opening was then sealed with a sealing film. Using a syringe, 5 μL of the prepared isovaleric acid and 2-nonenal solution was injected through the sealing film along the inner wall of the Erlenmeyer flask, ensuring that the solution did not come into contact with the test samples. The needle hole was then sealed again with a sealing film.

[0145] Let it stand for 2 hours under the standard atmospheric conditions specified in GB / T 6529.

[0146] For blank testing, repeat the above steps without placing the test sample.

[0147] After 2 hours of contact, hold the conical flask by the mouth and shake it vigorously about 20 times within 20 seconds, with or without the test sample. Insert the gas-tight injection needle vertically about 4 cm into the center of the sealing membrane at the mouth of the conical flask. Use the gas-tight injection needle to draw the test gas from the flask; the sample volume depends on the type of gas chromatograph used.

[0148] Detection tube method: Place each sample to be tested in a sampling bag, evacuate the gas in the sampling bag using a vacuum pump or vacuum pump, inject 3L of ammonia and acetic acid sample gas into the sampling bag respectively using an air pump, let stand for 2 hours, and use a 100mL syringe to extract 100mL of the gas to be tested from each sampling bag containing the sample, and read the color change position scale through the detection tube.

[0149] The ORR% (Organic Rate of Reduction) of odor chemical components was calculated, and the results are shown in Table 4.

[0150] Mechanical properties: The abrasion resistance and elongation at break of the antibacterial and deodorizing fabrics of Examples 1-16 and Comparative Examples 1-6 were tested. The test results are shown in Table 5.

[0151] The experimental data and their analysis are as follows:

[0152] Table 1. Antimicrobial test results of fabrics in each embodiment and comparative example.

[0153]

[0154] Table 2. Antimicrobial test results of fabrics in each embodiment and comparative example.

[0155]

[0156]

[0157] (Note: The sample has antibacterial effect if the inhibition rate against Staphylococcus aureus and Escherichia coli is ≥70% and the inhibition rate against Candida albicans is ≥60%.)

[0158] As shown in Tables 1 and 2, the antibacterial and deodorizing fabrics of Examples 1 to 16 of the present invention, after 20 washes, all exhibited an antibacterial rate of >95% against Staphylococcus aureus, Escherichia coli, and Candida albicans. This indicates that the antibacterial and deodorizing fabrics of the present invention have long-lasting antibacterial properties and good water resistance.

[0159] As can be seen from the data of Examples 1-4 and Comparative Examples 1-2, the antibacterial rate first increases and then decreases to a stable state as the load rate increases. Considering cost and efficiency, the load rate of the present invention is preferably 25%.

[0160] As can be seen from the data of Examples 1, 5-11 and Comparative Example 3, the antibacterial rate increases and tends to stabilize with the increase of the amount of blended functional masterbatch. Considering the cost, the present invention preferably uses functional masterbatch and polypropylene chips in a mass ratio of 3.5:96.5 for melt spinning.

[0161] As can be seen from the data in Examples 1, 12-15, the antibacterial rate increases with the increase of spinning temperature. However, when the spinning temperature reaches 180°C in Comparative Example 4, the functional masterbatch has no cooling effect. During the spinning process, aminoguanidine hydrochloride becomes ineffective, resulting in a decrease in the antibacterial rate of the final fabric.

[0162] The fabric prepared in Comparative Example 5 was not heat-treated, and it lacked a fluffy internal structure, resulting in poor breathability and providing a favorable environment for the growth of microorganisms, thus leading to a low antibacterial rate.

[0163] The fabric prepared in Comparative Example 6, without the addition of aminoguanidine hydrochloride, showed a significant decrease in its inhibitory effect on Escherichia coli and Staphylococcus aureus, indicating poor antibacterial properties.

[0164] Table 3 Dissolution Test of Antibacterial Substances in Fabrics of Each Example and Comparative Examples 1-3

[0165]

[0166]

[0167] (Note: Width of inhibition zone D: D≤1mm is non-dissolution, 1mm<D≤5mm is slightly dissolution, 5mm<D≤10mm is moderately dissolution, D>10mm is dissolution)

[0168] As can be seen from Table 3, the maximum inhibition zone width of the antibacterial and deodorant fabric prepared by the present invention is <1.1mm, and the dissolution of antibacterial substances shows non-dissolution and good slightly dissolution, indicating that the antibacterial and deodorant fabric of the present invention will not cause harm to human health and is safer and more reliable. Although the dissolution of antibacterial substances in the fabrics of Comparative Examples 4-6 shows slightly dissolution, their maximum inhibition zone width is significantly higher than that of the antibacterial and deodorant fabric of the present invention, and their safety is lower than that of the antibacterial and deodorant fabric of the present invention.

[0169] Table 4 Deodorant Performance of Fabrics of Each Example and Each Comparative Example

[0170]

[0171]

[0172] As can be seen from Table 4, under the combined action of antibacterial agent, activated carbon and aminoguanidine salt, the antibacterial and deodorant fabric prepared by the present invention has excellent deodorant effect on ammonia, acetic acid, isovaleric acid and 2-nonenal odor molecules. The deodorization of the antibacterial and deodorant fabric of the present invention is higher than that of the comparative fabric. Under the condition of too high spinning temperature, the deodorization rate of the fabric of Comparative Example 4 for 2-nonenal drops significantly. The fabric of Comparative Example 6 does not contain aminoguanidine salt which has deodorant effect on aldehyde gas, and only relies on activated carbon and low content antibacterial agent for deodorization, and the deodorization effect is poor.

[0173] The fabric of Comparative Example 5 has poor air permeability, and its deodorization effect is inferior to that of the antibacterial and deodorant fabric of the example of the present invention.

[0174] Table 5 Mechanical Properties of Fabrics of Each Example and Each Comparative Example

[0175]

[0176]

[0177] (The elongation at break of polypropylene fabric without any treatment is 25%, and the abrasion resistance of cotton fabric >200 times)

[0178] As shown in Table 5, the antibacterial and deodorizing fabrics of Examples 1-16 of the present invention exhibit excellent mechanical properties, approaching those of untreated polypropylene fabrics with no significant decrease in mechanical properties. Furthermore, they are more wear-resistant and durable than pure cotton fabrics.

[0179] Data from Examples 1-16 and Comparative Examples 1-6 show that excessive loading of aminoguanidine salt on activated carbon, excessive blending ratio of functional masterbatch, and excessive spinning temperature all affect the mechanical properties of the fabric, causing a significant decrease in the breaking elongation of the fabric, with a maximum decrease of 32%; and a relative decrease in abrasion resistance.

[0180] Furthermore, as can be seen from the above data, the loading rate of the aminoguanidine salt on activated carbon is preferably 25%, and the blending ratio of the functional masterbatch to polypropylene chips is preferably 3.5:96.5.

[0181] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A preparation process for an antibacterial and deodorizing fabric, characterized in that, Includes the following steps: (1) Loading aminoguanidine salt onto a porous carrier to prepare a deodorant, comprising: dissolving the aminoguanidine salt in water to prepare an impregnation solution, impregnating the porous carrier in the impregnation solution to obtain the deodorant; The porous support is activated carbon and / or sepiolite, and the loading rate of the porous support is 15-30%. (2) Using deodorant, lubricant, dispersant, antibacterial agent and matrix as raw materials, granulation is carried out to prepare functional masterbatch, including: mixing and drying deodorant, lubricant, dispersant, antibacterial agent and matrix, and then extruding, melting, extruding, cooling, stretching, pelletizing and drying by screw extrusion to obtain the functional masterbatch; The mass ratio of the deodorizer, the lubricant, the dispersant, the antibacterial agent, and the matrix is ​​(20~30):(0.5~3):(0.5~3):(1~2):(62~78). The lubricant is calcium stearate, the dispersant is hexenyl bis-stearamide, the matrix includes polyethylene and / or polypropylene, and the antibacterial agent includes one or more of nano titanium dioxide, nano zinc oxide, and nano cerium oxide. (3) The functional masterbatch and polypropylene chips are blended and melt-spun to obtain composite fibers, wherein the functional masterbatch and the polypropylene chips are blended at a mass ratio of (0.5~5):(95~99.5); The spinning temperature of the melt spinning is 130~150℃; (4) After heat treatment of the composite fiber in a relaxed state, it is blended with cotton fiber or viscose fiber to obtain antibacterial and deodorizing fabric. The heat treatment temperature is 95~100℃.

2. The preparation process according to claim 1, characterized in that, In step (1), the aminoguanidine salt is aminoguanidine sulfate, aminoguanidine nitrate or aminoguanidine hydrochloride.

3. The preparation process according to claim 1, characterized in that, In step (4), the heat treatment time is 15~20 min.

4. The preparation process according to claim 1, characterized in that, After the composite fiber is heat-treated in a relaxed state, the blending ratio of it with cotton fiber or viscose fiber is (35~50):(50~65).

5. An antibacterial and deodorizing fabric, characterized in that, The fabric is prepared by the process according to any one of claims 1 to 4.

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