Denim based on sarcandra glabra fibers and manufacturing method thereof

Abstract

The invention relates to the technical field of fabric treatment, and discloses jean based on sarcandra glabra fibers and a manufacturing method of the jean. The preparation method comprises the following steps: S1, by taking cotton fibers, polyester fibers and sarcandra glabra fibers as raw materials, weaving, pre-shaping, pre-treating, dyeing, post-treating, after-finishing and shaping, and washing to prepare denim base cloth; s2, the surface of denim base cloth is coated with the base layer paint, the coating thickness is 5-8 microns, and drying is conducted; the surface of the base layer paint is coated with the anti-adhesion antibacterial paint, the coating thickness ranges from 25 micrometers to 30 micrometers, drying is conducted, and denim is obtained; the mass ratio of the cotton fibers to the polyester fibers to the sarcandra glabra fibers is (5-6): (2-3): 1; the linear density of the sarcandra glabra fibers is 1.5-2 dtex, and the length of the sarcandra glabra fibers is 30 The linear density of the polyester fibers is 2-3 dtex, and the length of the polyester fibers is 30-50 mm.

Description

Technical Field

[0001] The invention relates to the technical field of fabric processing, and discloses a denim fabric based on coral grass fiber and a manufacturing method thereof. Background Art

[0002] Denim has the advantages of good durability and wear resistance and is widely used in the textile industry. In life, various bacteria can be found everywhere, and fabrics are more likely to absorb bacteria due to their porous characteristics. As people's pursuit of safe and efficient antibacterial clothing increases, traditional denim can no longer meet the demand.

[0003] In the prior art, the antibacterial ability of denim is often improved by introducing fibers with antibacterial properties. Coral grass fiber retains the pharmacological effects of the coral grass plant itself, has natural antibacterial function, and has excellent spinnability. However, when the amount of coral grass fiber introduced is too small, the antibacterial performance of the denim produced is not significantly improved, and too much addition will lead to a decrease in the breaking strength of the denim. In summary, it is of great significance to study a denim based on coral grass fiber with good mechanical properties and good antibacterial properties and a preparation method thereof. Summary of the invention

[0004] The object of the present invention is to provide a denim fabric based on coral grass fiber and a method for making the same, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for making denim based on coral grass fiber, comprising the following steps: S1: preparing a denim base fabric using cotton fiber, polyester fiber and coral grass fiber as raw materials;

[0006] S2: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 5 to 8 μm, and drying; applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 25 to 30 μm, and drying to obtain the denim.

[0007] More optimally, the mass ratio of cotton fiber, polyester fiber and coral grass fiber is (5-6):(2-3):1.

[0008] More optimally, the base layer coating comprises the following raw materials: 20-30 wt % of low molecular weight water-based solid acrylic resin, and the rest is water.

[0009] More optimally, the base layer coating comprises the following raw materials: 20-30 wt % of a water-based solid acrylic resin with a molecular weight of 2000 (SR705 from Qingdao Linke Industry & Trade Co., Ltd.), and the rest is water.

[0010] More optimally, the anti-adhesion antibacterial coating comprises a first coating and a second coating in a mass ratio of 1:(1-2);

[0011] The preparation of the first coating comprises the following steps: taking water and sodium dodecyl sulfate, stirring fully, then sequentially adding butyl acrylate, methyl methacrylate, acrylic acid, acrylonitrile, N-hydroxymethylpropionamide, anti-blocking agent, and silane coupling agent, stirring fully, and preparing emulsion A; taking water, sodium dodecyl sulfate, and an initiator, stirring evenly, and preparing an initiator solution; heating to 85-88° C., and simultaneously dropping emulsion A and the initiator solution, the dropping time is 3-4 hours, and after the dropping is completed, keeping the temperature for 3-4 hours; cooling to 40-45° C., adding ammonia water to adjust the pH value to 7-8, and adding a defoaming agent, and preparing the first coating;

[0012] The preparation of the second coating comprises the following steps: taking water and sodium dodecyl sulfate, stirring fully, then sequentially adding butyl acrylate, methyl methacrylate, acrylic acid, acrylonitrile, N-hydroxymethylpropionamide, an antibacterial agent, and a silane coupling agent, stirring fully, and obtaining an emulsion B; taking water, sodium dodecyl sulfate, and an initiator, stirring evenly, and obtaining an initiator solution; heating to 85-88° C., and simultaneously dripping the emulsion B and the initiator solution, the dripping time being 3-4 hours, and keeping warm for 3-4 hours after the dripping is completed; cooling to 40-45° C., adding ammonia water to adjust the pH value to 7-8, and adding a defoaming agent to obtain the second coating.

[0013] Preferably, the emulsion A comprises the following raw materials, by weight: 40-50 parts of water, 1-2 parts of sodium dodecyl sulfate, 40-50 parts of butyl acrylate, 10-15 parts of methyl methacrylate, 10-15 parts of acrylic acid, 1-3 parts of acrylonitrile, 1-2 parts of N-hydroxymethylpropionamide, 10-15 parts of anti-blocking agent, and 1-2 parts of silane coupling agent; the initiator solution comprises the following raw materials, by weight: 40-50 parts of water, 1-2 parts of sodium dodecyl sulfate, and 0.1-0.5 parts of initiator; the emulsion B comprises the following raw materials, calculated by mass: 40-50 parts of water, 1-2 parts of sodium dodecyl sulfate, 40-50 parts of butyl acrylate, 10-15 parts of methyl methacrylate, 10-15 parts of acrylic acid, 1-3 parts of acrylonitrile, 1-2 parts of N-hydroxymethylpropionamide, 5-8 parts of antibacterial agent, and 1-2 parts of silane coupling agent.

[0014] More preferably, the silane coupling agent is a vinyl silane coupling agent.

[0015] More optimally, the preparation of the anti-adhesion agent comprises the following steps: mixing bi-terminal alcohol hydroxy silicone oil, 3-bromopropylene, 1-bromo-2-fluoro-4-nitrobenzene, sodium carbonate and tetrahydrofuran evenly, stirring at 70-80° C. for 10-15 hours, and removing the solvent to obtain the anti-adhesion agent;

[0016] The preparation of the antibacterial agent comprises the following steps: uniformly mixing N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 3-bromopropylene, sodium carbonate and tetrahydrofuran, stirring at 70-80° C. for 5-7 hours, and removing the solvent to obtain the antibacterial agent.

[0017] More optimally, the anti-adhesion agent comprises the following raw materials, by mass: 80 to 100 parts of double-end alcohol hydroxy silicone oil, 12 to 15 parts of 3-bromopropylene, 20 to 25 parts of 1-bromo-2-fluoro-4-nitrobenzene, 20 to 30 parts of sodium carbonate, and 200 to 300 parts of tetrahydrofuran;

[0018] The antibacterial agent comprises the following raw materials, calculated by weight: 30 to 35 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 12 to 15 parts of 3-bromopropylene, 10 to 15 parts of sodium carbonate, and 100 to 120 parts of tetrahydrofuran.

[0019] More optimally, the process flow for preparing denim base fabric is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, and washing.

[0020] More optimally, the preparation of the denim base fabric includes the following steps: weaving (the fabric has a twill structure) → pre-setting (setting treatment at 200°C for 30 seconds) → pre-treatment (immersing in a solution containing 1g / L penetrant, 2g / L caustic soda and 2g / L hydrogen peroxide, treating at 100°C for 30 minutes, and performing peracid deoxygenation treatment) → dyeing (dying with active indigo dye) → post-treatment (soap washing) → post-finishing setting (immersing in soft oil with a concentration of 50g / L, heat setting at 160°C) → washing.

[0021] More optimally, the linear density of coral grass fiber is 1.5-2dtex, and the length is 30-50mm; the linear density of polyester fiber is 2-3dtex, and the length is 30-50mm.

[0022] More optimally, the single fiber linear density of coral grass fiber is 1.7dtex and the length is 38mm; the linear density of polyester fiber is 2.4dtex and the length is 50mm.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are: the denim base fabric is prepared with cotton fiber, polyester fiber and coral grass fiber as raw materials, the coral grass fiber has natural antibacterial properties, but the amount of coral grass fiber added in this step cannot be too much, otherwise it will affect the breaking strength of the denim;

[0024] In order to further enhance the antibacterial property, a coating is applied to the surface of the denim base fabric: a base coating is first applied, and the raw materials include low molecular weight water-based solid acrylic resin. The acrylic resin coating with a low molecular weight can form a highly flexible coating, which is suitable for use as a base layer to improve the bonding strength between the second coating and the fabric;

[0025] The second coating (anti-adhesion antibacterial coating) includes a first coating and a second coating in a certain mass ratio; both the first coating and the second coating are polypropylene coatings, which have the problem of poor anti-adhesion; therefore, an anti-adhesion agent is added to the first coating, with double-end alcohol hydroxy silicone oil as the matrix, the silicone oil can increase the anti-adhesion of the coating, and further introduce 3-bromopropylene and 1-bromo-2-fluoro-4-nitrobenzene through the reaction of hydroxyl and bromine. The purpose of adding bromopropylene is to allow the anti-adhesion agent to participate in the copolymerization reaction and improve its dispersibility in the coating, and 1-bromo-2-fluoro-4-nitrobenzene can introduce fluorine elements, which further improves the anti-adhesion and stability of the coating, thereby improving the comfort of the denim; the second coating and the first The formula of the first coating is basically the same, and only the anti-adhesion agent is changed to an antibacterial agent, which can ensure good compatibility between the first coating and the second coating. The antibacterial agent uses N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride as the antibacterial component, and a double bond is introduced by the same method to enable it to participate in the copolymerization reaction, thereby improving the compatibility of the antibacterial agent in the coating and solving the migration problem; since the molecular weight of the polypropylene resin is small, the anti-adhesion effect can be significantly improved. The present invention adds the anti-adhesion agent and the antibacterial agent to the first coating and the second coating respectively, and then mixes them to obtain the anti-adhesion antibacterial coating, thereby avoiding the problem that the polymerization reaction of the polypropylene coating is affected by the excessive addition of the auxiliary agent, and finally obtains the denim with good anti-adhesion property, good antibacterial property and good base fabric breaking strength. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that there is no special restriction on the purchase manufacturers of all raw materials involved in the present invention, and illustratively include: ethanol (CAS: 64-17-5); sodium carbonate (anhydrous sodium carbonate, CAS: 497-19-8); low molecular weight water-based solid acrylic resin (SR705 of Qingdao Linke Industry and Trade Co., Ltd., molecular weight 2000); N-hydroxymethylpropionamide (CAS: 924-42-5); vinyl silane coupling agent (CAS: 2768-02-7); initiator (benzoyl peroxide acyl, CAS: 94-36-0); defoamer (XIAMETERAFE-1520 emulsion defoamer, Guangzhou Rongda Chemical Co., Ltd.); double-terminal alcohol hydroxy silicone oil (Anhui IOTA Silicone Oil IOTA2110, molecular weight 1000); 3-bromopropylene (CAS: 106-95-6); 1-bromo-2-fluoro-4-nitrobenzene (CAS: 185331-69-5); N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride (CAS: 82711-88-4);

[0028] Unless otherwise specified, the following are parts by mass and mass ratios;

[0029] The linear density of single fiber of coral grass fiber is 1.7dtex, and the length is 38mm; the linear density of polyester fiber is 2.4dtex, and the length is 50mm;

[0030] Base layer coating: low molecular weight water-based solid acrylic resin, content 25wt%, the rest is water;

[0031] Take 48 parts of water, 1 part of sodium dodecyl sulfate, and 0.3 parts of initiator, stir evenly to obtain an initiator solution;

[0032] Example 1: S1: 100 parts of double-terminal alcohol hydroxy silicone oil, 14 parts of 3-bromopropylene, 22 parts of 1-bromo-2-fluoro-4-nitrobenzene, 24 parts of sodium carbonate, and 300 parts of tetrahydrofuran were mixed uniformly, stirred at 80° C. for 12 h, and the solvent was removed to obtain an anti-adhesion agent;

[0033] S2: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 12 parts of anti-blocking agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion A; heat to 85°C, and simultaneously add emulsion A and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the first coating;

[0034] S3: 32 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 15 parts of 3-bromopropylene, 15 parts of sodium carbonate and 100 parts of tetrahydrofuran were mixed evenly, stirred at 80°C for 6 hours, and the solvent was removed to obtain an antibacterial agent;

[0035] S4: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 6 parts of antibacterial agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion B; heat to 85°C, and simultaneously add emulsion B and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the second coating;

[0036] S5: The first coating and the second coating are mixed evenly in a mass ratio of 1:1 to obtain an anti-adhesion antibacterial coating:

[0037] S6: using cotton fiber, polyester fiber and coral grass fiber in a mass ratio of 5:2:1 as raw materials to prepare denim base fabric, the process flow is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, washing;

[0038] S7: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 6 μm, drying, applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 30 μm, drying, and obtaining the denim.

[0039] Example 2: S1: 100 parts of double-end alcohol hydroxy silicone oil, 12 parts of 3-bromopropylene, 25 parts of 1-bromo-2-fluoro-4-nitrobenzene, 20 parts of sodium carbonate, and 300 parts of tetrahydrofuran were mixed uniformly, stirred at 80° C. for 12 h, and the solvent was removed to obtain an anti-adhesion agent;

[0040] S2: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 40 parts of butyl acrylate, 10 parts of methyl methacrylate, 15 parts of acrylic acid, 3 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 10 parts of anti-blocking agent, and 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion A; heat to 85°C, and simultaneously add emulsion A and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the first coating;

[0041] S3: 30 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 12 parts of 3-bromopropylene, 10 parts of sodium carbonate and 100 parts of tetrahydrofuran were mixed evenly, stirred at 80°C for 6 hours, and the solvent was removed to obtain an antibacterial agent;

[0042] S4: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 40 parts of butyl acrylate, 10 parts of methyl methacrylate, 15 parts of acrylic acid, 3 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 5 parts of antibacterial agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion B; heat to 85°C, and simultaneously add emulsion B and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the second coating;

[0043] S5: The first coating and the second coating are mixed evenly in a mass ratio of 1:1 to obtain an anti-adhesion antibacterial coating:

[0044] S6: using cotton fiber, polyester fiber and coral grass fiber in a mass ratio of 5:2:1 as raw materials to prepare denim base fabric, the process flow is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, washing;

[0045] S7: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 6 μm, drying, applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 30 μm, drying, and obtaining the denim.

[0046] Example 3: S1: 100 parts of double-terminal alcohol hydroxy silicone oil, 15 parts of 3-bromopropylene, 25 parts of 1-bromo-2-fluoro-4-nitrobenzene, 30 parts of sodium carbonate, and 300 parts of tetrahydrofuran were mixed uniformly, stirred at 80° C. for 12 h, and the solvent was removed to obtain an anti-adhesion agent;

[0047] S2: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 15 parts of methyl methacrylate, 10 parts of acrylic acid, 1 part of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 15 parts of anti-blocking agent, and 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion A; heat to 85°C, and simultaneously add emulsion A and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the first coating;

[0048] S3: 35 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 15 parts of 3-bromopropylene, 15 parts of sodium carbonate and 100 parts of tetrahydrofuran were mixed evenly, stirred at 80°C for 6 hours, and the solvent was removed to obtain an antibacterial agent;

[0049] S4: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 15 parts of methyl methacrylate, 10 parts of acrylic acid, 1 part of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 8 parts of antibacterial agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion B; heat to 85°C, and simultaneously add emulsion B and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the second coating;

[0050] S5: The first coating and the second coating are mixed evenly in a mass ratio of 1:1 to obtain an anti-adhesion antibacterial coating:

[0051] S6: using cotton fiber, polyester fiber and coral grass fiber in a mass ratio of 5:2:1 as raw materials to prepare denim base fabric, the process flow is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, washing;

[0052] S7: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 6 μm, drying, applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 30 μm, drying, and obtaining the denim.

[0053] Comparative Example 1 (the addition ratio of cotton fiber, polyester fiber and coral grass fiber was changed, and the other method steps were consistent with Example 1): S1: 100 parts of double-end alcohol hydroxy silicone oil, 14 parts of 3-bromopropylene, 22 parts of 1-bromo-2-fluoro-4-nitrobenzene, 24 parts of sodium carbonate, and 300 parts of tetrahydrofuran were mixed uniformly, stirred at 80° C. for 12 hours, and the solvent was removed to obtain an anti-adhesion agent;

[0054] S2: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 12 parts of anti-blocking agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion A; heat to 85°C, and simultaneously add emulsion A and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the first coating;

[0055] S3: 32 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 15 parts of 3-bromopropylene, 15 parts of sodium carbonate and 100 parts of tetrahydrofuran were mixed evenly, stirred at 80°C for 6 hours, and the solvent was removed to obtain an antibacterial agent;

[0056] S4: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 6 parts of antibacterial agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion B; heat to 85°C, and simultaneously add emulsion B and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the second coating;

[0057] S5: The first coating and the second coating are mixed evenly in a mass ratio of 1:1 to obtain an anti-adhesion antibacterial coating:

[0058] S6: using cotton fiber, polyester fiber and coral grass fiber in a mass ratio of 5:2:2 as raw materials to prepare denim base fabric, the process flow is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, washing;

[0059] S7: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 6 μm, drying, applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 30 μm, drying, and obtaining the denim.

[0060] Comparative Example 2 (reducing the amount of coral grass fiber added and increasing the thickness of the anti-adhesion antibacterial coating, the remaining method steps are consistent with Example 1): S1: 100 parts of double-end alcohol hydroxy silicone oil, 14 parts of 3-bromopropylene, 22 parts of 1-bromo-2-fluoro-4-nitrobenzene, 24 parts of sodium carbonate, and 300 parts of tetrahydrofuran are mixed uniformly, stirred at 80° C. for 12 hours, and the solvent is removed to obtain an anti-adhesion agent;

[0061] S2: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 12 parts of anti-blocking agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion A; heat to 85°C, and simultaneously add emulsion A and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the first coating;

[0062] S3: 32 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 15 parts of 3-bromopropylene, 15 parts of sodium carbonate and 100 parts of tetrahydrofuran were mixed evenly, stirred at 80°C for 6 hours, and the solvent was removed to obtain an antibacterial agent;

[0063] S4: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 6 parts of antibacterial agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion B; heat to 85°C, and simultaneously add emulsion B and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the second coating;

[0064] S5: The first coating and the second coating are mixed evenly in a mass ratio of 1:1 to obtain an anti-adhesion antibacterial coating:

[0065] S6: using cotton fiber, polyester fiber and coral grass fiber in a mass ratio of 5:2:0.5 as raw materials to prepare a denim base fabric, the process flow is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, washing;

[0066] S7: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 6 μm, drying, applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 35 μm, drying, and obtaining the denim.

[0067] Comparative Example 3 (the preparation method of the anti-adhesion antibacterial coating is changed, and the other method steps are consistent with Example 1): S1: 100 parts of double-end alcohol hydroxy silicone oil, 14 parts of 3-bromopropylene, 22 parts of 1-bromo-2-fluoro-4-nitrobenzene, 24 parts of sodium carbonate, and 300 parts of tetrahydrofuran are mixed uniformly, stirred at 80° C. for 12 h, and the solvent is removed to obtain an anti-adhesion agent;

[0068] S2: 32 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 15 parts of 3-bromopropylene, 15 parts of sodium carbonate and 100 parts of tetrahydrofuran were mixed evenly, stirred at 80°C for 6 hours, and the solvent was removed to obtain an antibacterial agent;

[0069] S3: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 12 parts of anti-adhesion agent, 6 parts of antibacterial agent, 1 part of vinyl silane coupling agent in sequence, stir well to obtain an emulsion; heat to 85°C, drop the emulsion and initiator solution simultaneously, the drop time is 4h, keep warm for 4h after the drop addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, add 0.1 parts of defoaming agent, and obtain an anti-adhesion antibacterial coating:

[0070] S4: using cotton fiber, polyester fiber and coral grass fiber in a mass ratio of 5:2:1 as raw materials to prepare denim base fabric, the process flow is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, washing;

[0071] S5: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 6 μm, drying, applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 30 μm, drying, and obtaining the denim.

[0072] Comparative Example 4 (without using the base layer coating, the remaining steps are the same as those of Example 1): S1: 100 parts of double-end alcohol hydroxy silicone oil, 14 parts of 3-bromopropylene, 22 parts of 1-bromo-2-fluoro-4-nitrobenzene, 24 parts of sodium carbonate, and 300 parts of tetrahydrofuran are mixed uniformly, stirred at 80° C. for 12 h, and the solvent is removed to obtain an anti-adhesion agent;

[0073] S2: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 12 parts of anti-blocking agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion A; heat to 85°C, and simultaneously add emulsion A and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the first coating;

[0074] S3: 32 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 15 parts of 3-bromopropylene, 15 parts of sodium carbonate and 100 parts of tetrahydrofuran were mixed evenly, stirred at 80°C for 6 hours, and the solvent was removed to obtain an antibacterial agent;

[0075] S4: Take 40 parts of water and 1 part of sodium dodecyl sulfonate, stir well, then add 50 parts of butyl acrylate, 12 parts of methyl methacrylate, 12 parts of acrylic acid, 2 parts of acrylonitrile, 1 part of N-hydroxymethylpropionamide, 6 parts of antibacterial agent, 1 part of vinyl silane coupling agent in sequence, stir well, and prepare emulsion B; heat to 85°C, and simultaneously add emulsion B and initiator solution dropwise for 4 hours, and keep warm for 4 hours after the addition is completed; cool to 45°C, add ammonia water to adjust the pH value to 7.5, and add 0.1 parts of defoaming agent to prepare the second coating;

[0076] S5: The first coating and the second coating are mixed evenly in a mass ratio of 1:1 to obtain an anti-adhesion antibacterial coating:

[0077] S6: using cotton fiber, polyester fiber and coral grass fiber in a mass ratio of 5:2:1 as raw materials to prepare denim base fabric, the process flow is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, washing;

[0078] S7: coating the anti-adhesion antibacterial coating on the surface of the base layer coating with a coating thickness of 30 μm, and drying to obtain the denim.

[0079] Performance test: The denim fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were tested for (1) antibacterial rate against Staphylococcus aureus (ATCC 6538) with reference to GB / T 20994.3-2008; (2) anti-adhesion property with reference to FZ / T01063; (3) warp breaking strength with reference to GB / T3923.1 using an electronic fabric strength tester, at a tensile rate of 100 mm / min and a pre-tension of 2 N; see Table 1 for details.

[0080] Table 1:

[0081] Antibacterial rate / % Adhesion ratio / % Breaking strength / N Example 1 99.8 4.4 558 Example 2 99.7 4.4 553 Example 3 99.8 4.5 555 Comparative Example 1 98.7 4.8 483 Comparative Example 2 97.1 5.2 566 Comparative Example 3 91.2 5.4 501 Comparative Example 4 95.0 4.7 539

[0082] Conclusion: In comparative example 1, the addition ratio of cotton fiber, polyester fiber and coral grass fiber was changed, and the coral grass fiber was more, and the mechanical properties decreased significantly; in comparative example 2, the addition amount of coral grass fiber was reduced and the thickness of the anti-adhesion antibacterial coating was increased. While the antibacterial property decreased, adhesion occurred in the coating; in comparative example 3, the preparation method of the anti-adhesion antibacterial coating was changed, and the anti-adhesion agent and the antibacterial agent were added simultaneously for copolymerization. Due to the influence of grafting rate, steric hindrance, etc., the performance decreased significantly; in comparative example 4, the base layer coating was not used, and the performance was not as good as that in the embodiment; in summary, the denim prepared by the present invention has good mechanical properties, good antibacterial property and good coating anti-adhesion property.

[0083] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. although The present invention has been described in detail with reference to the aforementioned embodiments. For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for making denim based on coral grass fiber, characterized in that: The following steps are involved: S1: using cotton fiber, polyester fiber and coral grass fiber as raw materials to prepare denim base fabric; S2: applying the base layer coating to the surface of the denim base fabric with a coating thickness of 5 to 8 μm, and drying; applying the anti-adhesion antibacterial coating to the surface of the base layer coating with a coating thickness of 25 to 30 μm, and drying to obtain the denim.

2. The method for making denim based on coral grass fiber according to claim 1, characterized in that: The mass ratio of cotton fiber, polyester fiber and coral grass fiber is (5-6):(2-3):

1.

3. The method for making denim based on coral grass fiber according to claim 1, characterized in that: The base layer coating comprises the following raw materials: 20-30 wt% of low molecular weight water-based solid acrylic resin and the rest of water.

4. The method for making denim based on coral grass fiber according to claim 1, characterized in that: The anti-adhesion antibacterial coating comprises a first coating and a second coating in a mass ratio of 1:(1-2); The preparation of the first coating comprises the following steps: taking water and sodium dodecyl sulfate, stirring fully, then sequentially adding butyl acrylate, methyl methacrylate, acrylic acid, acrylonitrile, N-hydroxymethylpropionamide, anti-blocking agent, and silane coupling agent, stirring fully, and preparing emulsion A; taking water, sodium dodecyl sulfate, and an initiator, stirring evenly, and preparing an initiator solution; heating to 85-88° C., and simultaneously dropping emulsion A and the initiator solution, the dropping time is 3-4 hours, and after the dropping is completed, keeping the temperature for 3-4 hours; cooling to 40-45° C., adding ammonia water to adjust the pH value to 7-8, and adding a defoaming agent, and preparing the first coating; The preparation of the second coating comprises the following steps: taking water and sodium dodecyl sulfate, stirring fully, then sequentially adding butyl acrylate, methyl methacrylate, acrylic acid, acrylonitrile, N-hydroxymethylpropionamide, an antibacterial agent, and a silane coupling agent, stirring fully, and obtaining an emulsion B; taking water, sodium dodecyl sulfate, and an initiator, stirring evenly, and obtaining an initiator solution; heating to 85-88° C., and simultaneously dripping the emulsion B and the initiator solution, the dripping time being 3-4 hours, and keeping warm for 3-4 hours after the dripping is completed; cooling to 40-45° C., adding ammonia water to adjust the pH value to 7-8, and adding a defoaming agent to obtain the second coating.

5. The method for making denim based on coral grass fiber according to claim 4, characterized in that: The emulsion A comprises the following raw materials, calculated by weight: 40-50 parts of water, 1-2 parts of sodium dodecyl sulfonate, 40-50 parts of butyl acrylate, 10-15 parts of methyl methacrylate, 10-15 parts of acrylic acid, 1-3 parts of acrylonitrile, 1-2 parts of N-hydroxymethylpropionamide, 10-15 parts of anti-adhesion agent, and 1-2 parts of silane coupling agent; the initiator solution comprises the following raw materials, calculated by weight: 40-50 parts of water, 1-2 parts of sodium dodecyl sulfonate, and 0.1-0.5 parts of initiator; the emulsion B comprises the following raw materials, calculated by weight: 40-50 parts of water, 1-2 parts of sodium dodecyl sulfonate, 40-50 parts of butyl acrylate, 10-15 parts of methyl methacrylate, 10-15 parts of acrylic acid, 1-3 parts of acrylonitrile, 1-2 parts of N-hydroxymethylpropionamide, 5-8 parts of antibacterial agent, and 1-2 parts of silane coupling agent.

6. The method for making denim based on coral grass fiber according to claim 4, characterized in that: The preparation of the anti-adhesion agent comprises the following steps: mixing bivalent alcohol hydroxy silicone oil, 3-bromopropylene, 1-bromo-2-fluoro-4-nitrobenzene, sodium carbonate and tetrahydrofuran evenly, stirring at 70-80° C. for 10-15 hours, and removing the solvent to obtain the anti-adhesion agent; The preparation of the antibacterial agent comprises the following steps: uniformly mixing N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 3-bromopropylene, sodium carbonate and tetrahydrofuran, stirring at 70-80° C. for 5-7 hours, and removing the solvent to obtain the antibacterial agent.

7. The method for making denim based on coral grass fiber according to claim 6, characterized in that: The anti-adhesion agent includes the following raw materials, calculated by mass: 80 to 100 parts of double-end alcohol hydroxy silicone oil, 12 to 15 parts of 3-bromopropylene, 20 to 25 parts of 1-bromo-2-fluoro-4-nitrobenzene, 20 to 30 parts of sodium carbonate, and 200 to 300 parts of tetrahydrofuran; The antibacterial agent comprises the following raw materials, calculated by weight: 30 to 35 parts of N,N,N-trimethyl-2-hydroxyhexadecyl ammonium chloride, 12 to 15 parts of 3-bromopropylene, 10 to 15 parts of sodium carbonate, and 100 to 120 parts of tetrahydrofuran.

8. The method for making denim based on coral grass fiber according to claim 1, characterized in that: The process flow of denim base fabric preparation is: weaving, pre-setting, pre-treatment, dyeing, post-treatment, post-finishing and setting, and washing.

9. The method for making denim based on coral grass fiber according to claim 1, characterized in that: The linear density of coral grass fiber is 1.5~2dtex, and the length is 30~50mm; the linear density of polyester fiber is 2~3dtex, and the length is 30~50mm.

10. The denim fabric prepared by the method for preparing denim fabric based on coral grass fiber according to any one of claims 1 to 9.