Antibacterial deodorant woven fabric and preparation process thereof

Abstract

The invention discloses an antibacterial deodorant woven fabric and a preparation process thereof, and relates to the technical field of layered fabrics. The invention relates to an antibacterial deodorant woven fabric which is formed by directly compounding a surface layer and a functional layer from top to bottom in sequence, the functional layer is made of an antibacterial and deodorant composite material; the antibacterial deodorant composite material is prepared from the following components in parts by mass: 100 parts of polyvinyl chloride resin, 15-35 parts of a plasticizer, 8-25 parts of an antibacterial deodorant and 0.5-5 parts of a heat stabilizer. The ternary ratio of the resin, the plasticizer and the antibacterial agent in the functional layer forms a synergistic effect through intermolecular acting force, and the mechanical strength of the fabric after water absorption is maintained while the antibacterial effect is guaranteed. And the hot-pressing compounding process of the surface polyester knitted fabric and the functional layer further enhances the interlayer binding force, and the structural stability can be realized without an adhesive.

Description

Technical Field

[0001] The invention relates to the technical field of layered fabrics, and in particular to an antibacterial and deodorizing woven fabric and a preparation process thereof. Background Art

[0002] In the textile industry, with improved living standards and heightened health awareness, functional requirements for woven fabrics are becoming increasingly diverse, with antibacterial and deodorizing properties becoming a key focus. Traditional woven fabrics, particularly in intimate apparel, sportswear, and home textiles, are highly susceptible to bacterial growth during use. This is because woven fabrics provide a suitable environment for bacterial growth. Human sweat and sebum provide a rich source of nutrients, and combined with the ideal temperature and humidity conditions experienced during daily wear and use, bacteria thrive.

[0003] The proliferation of bacteria can cause a host of problems. First, it can cause odor in fabrics, affecting the wearing experience and comfort, and causing embarrassment for the user. Second, bacterial growth can cause skin diseases. For people with sensitive skin, contact with the skin can cause allergies, itching, redness, swelling, and even infection, posing a health threat. Furthermore, in specialized settings, such as hospitals and food processing facilities, bacterial growth can lead to even more serious hygiene issues, resulting in risks such as cross-infection.

[0004] Current antibacterial and deodorizing fabrics on the market suffer from numerous shortcomings. Some products lack sustained antibacterial effectiveness, significantly decreasing with repeated washings and failing to meet the demands of long-term use. Some antibacterial fabrics also pose safety risks, using harmful antibacterial and deodorizing agents. While these agents may offer short-term antibacterial effects, long-term exposure may pose potential health risks. Furthermore, the complex and costly manufacturing processes of some antibacterial and deodorizing fabrics limit their widespread adoption.

[0005] To address these issues, the market urgently needs an antibacterial and odor-resistant woven fabric that offers significant, long-lasting, safe, and reliable antibacterial and odor-resistant effects, while also being simple to prepare and cost-effective. This invention addresses these market demands and the shortcomings of existing technologies by proposing an innovative antibacterial and odor-resistant woven fabric and its preparation process. The aim is to provide the textile industry with a solution that effectively addresses these issues and meets people's demand for healthy and comfortable textiles. Summary of the Invention

[0006] The purpose of the present invention is to provide an antibacterial and deodorizing woven fabric with long-lasting antibacterial effect, high safety and simple preparation process and its preparation process in order to address the defects of the prior art antibacterial and deodorizing woven fabrics such as short-lasting antibacterial effect, poor safety and complex preparation process.

[0007] To achieve the above object, the technical solution adopted by the present invention is: an antibacterial and deodorizing woven fabric, an antibacterial and deodorizing woven fabric is directly compounded from top to bottom by a surface layer and a functional layer; The functional layer is composed of an antibacterial and deodorizing composite material; The antibacterial and deodorizing composite material is composed of the following components by weight: 100 parts of polyvinyl chloride resin, 15-35 parts of plasticizer, 8-25 parts of antibacterial and deodorizing agent, and 0.5-5 parts of heat stabilizer; The antibacterial deodorant has a structure shown in Formula 1: Formula 1; The R1 is selected from the group consisting of: methyl, ethyl, tert-butyl, and phenyl.

[0008] Furthermore, the molecular weight of the polyvinyl chloride resin is 50,000-110,000.

[0009] Furthermore, the plasticizer is dioctyl phthalate; and the heat stabilizer is dimethyl tin.

[0010] Furthermore, the antibacterial deodorant is any one of the compounds shown in the following structures: ; .

[0011] Furthermore, the preparation method of the antibacterial and deodorizing composite material includes the following steps: adding the polyvinyl chloride resin, plasticizer, and heat stabilizer according to parts by mass into a high-speed mixer, and mixing at 80-100° C. for 5-10 minutes; adding the antibacterial and deodorizing agent and continuing to mix at 60-70° C. for 10-15 minutes; feeding the mixture into a twin-screw extruder, melt-blending at 160-180° C., and then extruding and granulating; and calendering the granules into a film with a thickness of 0.1-0.3 mm through a calender to obtain the antibacterial and deodorizing composite material.

[0012] Furthermore, the surface layer is made of polyester knitted fabric material.

[0013] Furthermore, the thickness of the functional layer is 0.1-0.3 mm, and the thickness of the surface layer is 0.1-0.5 mm.

[0014] A preparation process for an antibacterial and deodorizing woven fabric comprises the following steps: laminating the surface layer and the functional layer under hot pressing conditions to form a layered structure, wherein the hot pressing temperature is 120-160° C., the pressure is 5-10 MPa, and the laminating time is 3-8 minutes; after lamination, cooling to room temperature, cutting, and winding to obtain the antibacterial and deodorizing woven fabric.

[0015] Furthermore, the hot pressing composite is performed using a roller press with a rolling speed of 1-3 m / min.

[0016] Furthermore, the cooling is performed by air cooling.

[0017] The antimicrobial deodorant described herein works by inhibiting microbial growth. Its core structure is a nitrogen-containing heterocyclic compound, with lipophilic aromatic groups and hydrophilic oxygen-containing groups forming an amphiphilic structure. This structure can disrupt the integrity of microbial cell membranes by intercalating into the lipid layer of the cell membrane, disrupting the membrane structure. It also electrostatically binds to the negatively charged cell membrane, leading to leakage of intracellular substances. The nitrogen atoms within the heterocyclic structure can bind to the active centers of microbial enzymes, blocking energy metabolism and protein synthesis, thereby inhibiting their growth. The antimicrobial deodorant described herein has inhibitory effects on both Gram-positive and Gram-negative bacteria and fungi. The antimicrobial deodorant is stably bonded to the resin matrix, avoiding direct contact with human skin and meeting safety and reliability requirements. The thickness of the functional layer ensures uniform distribution of the antimicrobial deodorant, and ambient humidity, such as sweat, activates its ion exchange function, enhancing its antibacterial effect. In summary, the antibacterial deodorant of the present invention effectively blocks microbial growth through the dual mechanisms of physically destroying cell membranes and chemically inhibiting metabolism. Its stable composite process with polyvinyl chloride resin further ensures the durability and safety of antibacterial activity, eliminating fabric odors from the root and preventing bacterial growth.

[0018] The polyvinyl chloride resin described in the present invention provides a rigid skeleton, and its polar structure is combined with the antibacterial deodorant through intermolecular forces to form a stable coating. The plasticizer lowers the glass transition temperature of the resin, so that the antibacterial deodorant is evenly dispersed in the matrix, avoiding local aggregation and failure. The thermal stabilizer inhibits the deHCl reaction of polyvinyl chloride during processing, ensuring that the antibacterial deodorant structure does not decompose during melt blending at 160-180°C. First, the resin / plasticizer / stabilizer are mixed at high temperature (80-100°C) to form a homogeneous melt; then the antibacterial deodorant is added at low temperature (60-70°C) to avoid degradation of heat-sensitive antibacterial deodorants. The functional layer film thickness of 0.1-0.3mm ensures the sustained release of the antibacterial deodorant, and the surface polyester knitted fabric acts as a physical barrier to reduce direct skin contact of the antibacterial deodorant; roller compounding allows the functional layer and the surface layer to be entangled through molecular chains, avoiding microbial attachment sites introduced by adhesives.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. Significantly Improved Antimicrobial Performance: By utilizing a specifically structured nitrogen-containing heterocyclic antimicrobial and deodorant, the fabric achieves a dual mechanism of action: disrupting microbial cell membranes and inhibiting metabolism. This design ensures broad-spectrum antimicrobial activity against both Gram-positive and Gram-negative bacteria and fungi, with the antimicrobial activity being sustained through the sustained release of the functional film.

[0020] 2. Safety and process optimization: The polyvinyl chloride resin matrix encapsulates the antimicrobial agent, eliminating the risk of direct skin contact. Furthermore, the composite material preparation process, which utilizes staged temperature control, ensures processing stability while minimizing degradation of the heat-sensitive antimicrobial agent, resulting in a more efficient and reliable overall process.

[0021] 3. Balance of Mechanical Properties and Function: The ternary ratio of resin, plasticizer, and antimicrobial agent in the functional layer creates a synergistic effect through intermolecular forces, ensuring antimicrobial efficacy while maintaining the mechanical strength of the fabric after water absorption. The hot-pressing lamination process between the surface polyester knitted fabric and the functional layer further enhances the interlayer bond, achieving structural stability without the need for adhesives. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The antibacterial deodorant 1 of the present invention 1 HNMR spectrum. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Synthesis example 1 Synthesis of antibacterial deodorant 1: ; The first step: Under a nitrogen atmosphere, 25 g of raw material 1, 36.54 g of raw material 2, 30.70 g of anhydrous potassium carbonate, 3.85 g of tetrakis(triphenylphosphine)palladium and 330 g of a mixture of toluene, ethanol and aqueous solution in a volume ratio of 2:1:1 were added to the reaction system, heated to 95 ° C and refluxed for 10 hours, turned off the heating, cooled to room temperature, allowed to stand and separated, the aqueous phase was extracted twice with ethyl acetate, the organic phases were combined, the organic phases were dried over anhydrous magnesium sulfate, filtered, and dried, and silica gel column chromatography was performed using a mixture of petroleum ether and ethyl acetate as eluent, and dried to obtain 32.30 g of intermediate 1.

[0025] The second step: under a nitrogen atmosphere, 32.30g of intermediate 1, 27.96g of raw material 3, 0.87g of tri-tert-butyl phosphine, 0.30g of palladium carbon, 23.84g of anhydrous potassium carbonate and 300g of toluene were added to the reaction system, and the temperature was raised to 120°C and refluxed for 12 hours; after the reaction was completed, the temperature was slightly lowered, and the mixture was filtered using diatomaceous earth. After the filtrate was cooled to room temperature, it was washed three times with water, the organic phase was retained, and the aqueous phase was then extracted with ethyl acetate. After the organic phases were combined, the organic phase was dried over anhydrous magnesium sulfate, filtered, spin-dried, and subjected to silica gel column chromatography, using a mixture of petroleum ether and ethyl acetate as eluent, and spin-dried to obtain 40.48g of antibacterial and deodorant 1.

[0026] Structure identification: MS (m / z) of intermediate 1: [M+H] + =375; MS (m / z) of antibacterial deodorant 1: [M+H] + =564; Antibacterial deodorant 1 1 HNMR: δ7.85(m,2H),7.57-7.44(m,3H),7.43(dd,1H),7.27-7.17(m,4H),7.13(m,2H),7.06(m,1H),6.93(d,1H),5.21-5 .10(m,2H),4.94(m,1H),4.34(t,1H),4.12(dd,1H),4.03(s,1H),3.87(dd,1H),2.81(d,6H),2.49(d,3H),2.33(d,3H).

[0027] Synthesis Example 2-Synthesis Example 4 In Synthesis Examples 2-4, antibacterial deodorant 2-antibacterial deodorant 4 were synthesized in sequence, referring to the synthesis method of Synthesis Example 1, replacing raw material 1 therein, and remaining the same as Synthesis Example 1. Specific structures of raw material 2, antibacterial deodorant 2-antibacterial deodorant 4, MS (m / z): [M+H] + See Table 1 for data.

[0028] Table 1. Structure of raw material 1, antibacterial deodorant 2-antibacterial deodorant 4 involved in synthesis examples 2-4, MS (m / z): [M+H] + data.

[0029]

[0030] Example 1

[0031] Preparation of antibacterial and deodorizing woven fabric 1. Raw material preparation: (1) Functional layer composite material: 100 parts of polyvinyl chloride resin (average molecular weight 80,000), 25 parts of plasticizer (dioctyl phthalate), 15 parts of antibacterial and deodorant (antibacterial and deodorant 1 synthesized in Synthesis Example 1), and 2.5 parts of thermal stabilizer (dimethyl tin).

[0032] (2). Surface material: 150D / 144F polyester knitted fabric (weight 180g / m 2 ).

[0033] 2. Preparation of functional layer: Polyvinyl chloride resin, dioctyl phthalate, and dimethyl tin were put into a high-speed mixer, the temperature was set at 90°C, and mixing was carried out at a speed of 800 r / min for 8 minutes; antibacterial deodorant 1 was added, the temperature was lowered to 65°C, and mixing was continued for 12 minutes; the mixture was sent to a twin-screw extruder, and the temperature of each zone was set as follows: 160°C for zone 1, 170°C for zone 2, and 175°C for zone 3. After melt blending, the mixture was extruded through a die head to form granules; the granules were calendered on a four-roll calender with the roller temperature controlled at 165°C to form a functional layer film with a thickness of 0.2 mm.

[0034] 3. Composite process: The polyester knitted fabric was placed on a roller conveyor belt and covered with a functional layer film; the composite parameters were set as follows: hot pressing temperature 140°C, pressure 7 MPa, roller speed 2 m / min, and composite time 5 minutes; after composite, it was cooled to room temperature through an air cooling system with a cooling wind speed of 8 m / s; and after trimming with a slitting machine, it was rolled up to produce an antibacterial and deodorizing woven fabric 0.35 mm (functional layer 0.2 mm, surface layer 0.15 mm).

[0035] Example 2-Example 4 An antibacterial and deodorant woven fabric was prepared by referring to the preparation method of Example 1, except that the antibacterial and deodorant therein was replaced with the antibacterial and deodorant 2 to antibacterial and deodorant 4 prepared in Synthesis Examples 2 to 4, respectively, and the rest remained the same as Example 1.

[0036] Comparative Example 1 An antibacterial and deodorizing woven fabric was prepared by referring to the preparation method of Example 1, except that the antibacterial and deodorizing agent was not added, and the rest of the preparation method remained the same as Example 1.

[0037] Comparative Example 2 An antibacterial and deodorizing woven fabric was prepared by referring to the preparation method of Example 1, except that the mass fraction of the polyvinyl chloride resin was replaced with 120 parts, and the rest remained the same as in Example 1.

[0038] Comparative Example 3 An antibacterial and deodorizing woven fabric was prepared by referring to the preparation method of Example 1, except that the weight fraction of the plasticizer was changed to 5 parts, and the rest remained the same as in Example 1.

[0039] Performance testing: 1. Antibacterial Performance Test: The inhibition rates of the antibacterial and deodorizing woven fabrics prepared in the Examples and Comparative Examples against Escherichia coli and Staphylococcus aureus were measured in accordance with GB / T 20944.2-2007 "Evaluation of Antibacterial Properties of Textiles - Part 2: Absorption Method". The data are shown in Table 2.

[0040] 2. Tensile strength after 24 hours of water absorption: The tensile strength of the antibacterial and deodorizing woven fabrics prepared in the examples and comparative examples after 24 hours of water absorption was measured in accordance with GB / T 1040-1992. The data are shown in Table 2.

[0041] Table 2. Performance test data of an antibacterial and deodorizing woven fabric prepared in the examples and comparative examples.

[0042]

[0043] The inhibition rates of all examples against Escherichia coli and Staphylococcus aureus were significantly higher than those of Comparative Example 1 without the addition of an antibacterial agent, indicating that the antibacterial deodorant structure adopted in the present invention has a universal and efficient antibacterial effect. The difference in inhibition rates between antibacterial deodorants substituted with different R1 groups is small, indicating that substituents such as methyl and ethyl have limited effects on the activity of the core antibacterial structure. The tensile strength of the example group after water absorption is significantly better than that of Comparative Example 2 and Comparative Example 3, confirming that the formula ratio of the present invention can balance the antibacterial function and mechanical properties. The decrease in strength of Comparative Examples 2 and 3 reveals that deviation from the component ratio recommended by the present invention will lead to uneven plasticization of the material or abnormal crystallinity, thereby affecting durability. The extremely low inhibition rate of Comparative Example 1 highlights the key role of the antibacterial deodorant, while the high strength of the example group proves that the ternary system of resin-plasticizer-antibacterial agent in the functional layer has a synergistic enhancement effect.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An antibacterial and deodorizing woven fabric, characterized in that: An antibacterial and deodorizing woven fabric is directly compounded from top to bottom by a surface layer and a functional layer; The functional layer is composed of an antibacterial and deodorizing composite material; The antibacterial and deodorizing composite material is composed of the following components by weight: 100 parts of polyvinyl chloride resin, 15-35 parts of plasticizer, 8-25 parts of antibacterial and deodorizing agent, and 0.5-5 parts of heat stabilizer; The antibacterial deodorant has a structure shown in Formula 1: Formula 1; The R1 is selected from the group consisting of: methyl, ethyl, tert-butyl, and phenyl.

2. The antibacterial and deodorizing woven fabric according to claim 1, characterized in that: The molecular weight of the polyvinyl chloride resin is 50,000-110,000.

3. The antibacterial and deodorizing woven fabric according to claim 1, characterized in that: The plasticizer is dioctyl phthalate; the heat stabilizer is dimethyl tin.

4. The antibacterial and deodorizing woven fabric according to claim 1, characterized in that: The antibacterial deodorant is any one of the compounds shown in the following structures: ； 。 5. The antibacterial and deodorizing woven fabric according to claim 1, characterized in that: The preparation method of the antibacterial and deodorizing composite material comprises the following steps: adding the polyvinyl chloride resin, plasticizer, and heat stabilizer according to parts by mass into a high-speed mixer, and mixing at 80-100° C. for 5-10 minutes; adding the antibacterial and deodorizing agent and continuing to mix at 60-70° C. for 10-15 minutes; feeding the mixture into a twin-screw extruder, melt-blending at 160-180° C., and then extruding and granulating the mixture; and calendering the granules into a film with a thickness of 0.1-0.3 mm using a calender to prepare the antibacterial and deodorizing composite material.

6. The antibacterial and deodorizing woven fabric according to claim 1, characterized in that: The surface layer is made of polyester knitted fabric material.

7. The antibacterial and deodorizing woven fabric according to claim 1, characterized in that: The thickness of the functional layer is 0.1-0.3 mm, and the thickness of the surface layer is 0.1-0.5 mm.

8. A process for preparing an antibacterial and deodorizing woven fabric according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: compounding the surface layer and the functional layer under hot pressing conditions to form a layered structure, wherein the hot pressing temperature is 120-160°C, the pressure is 5-10 MPa, and the compounding time is 3-8 minutes; after compounding, cooling to room temperature, cutting and rolling to obtain the antibacterial and deodorizing woven fabric.

9. The process for preparing an antibacterial and deodorizing woven fabric according to claim 8, characterized in that: The hot pressing composite is performed by a roller press at a speed of 1-3 m / min.

10. The process for preparing the antibacterial and deodorizing woven fabric according to claim 8, characterized in that: The cooling method adopts air cooling.

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