A negative ion antibacterial far-infrared nonwoven fabric and its production process

Abstract

This invention relates to a negative ion antibacterial far-infrared nonwoven fabric and its production process. The fabric comprises, by weight, 65-88 parts polypropylene resin, 10-20 parts composite functional additives, 1-2 parts coupling agent, 1-3 parts antioxidant, and 1-2 parts lubricant. The triazole ring structure in the composite functional additives can directly contact bacteria attached to the matrix surface, causing bacterial death due to metabolic disorder, effectively improving the antibacterial properties of the matrix material. Furthermore, the triazole ring in the composite functional additives is a five-membered ring, which can chelate and encapsulate metal ions in nano-tourmaline powder, forming a relatively stable dispersion system in the polypropylene matrix. This allows the nano-tourmaline powder to slowly release negative ions, achieving long-term far-infrared release of negative ions. Additionally, the polyamide network structure can interpenetrate with the polypropylene matrix to form an interpenetrating network structure, further restricting the migration of antibacterial active groups and nano-tourmaline powder in the matrix.

Description

Technical Field

[0001] This invention belongs to the field of nonwoven fabric technology, specifically relating to a negative ion antibacterial far-infrared nonwoven fabric and its production process. Background Technology

[0002] Currently, the most common medical nonwoven fabric materials are spunbond and meltblown polypropylene nonwoven fabrics. These products are widely used in the medical field due to their high strength, non-toxicity, non-irritation, breathability, and comfort. However, polypropylene itself does not have antibacterial or negative ion far-infrared emission functions. It is usually necessary to blend antibacterial agents and tourmaline to give it negative ion antibacterial and far-infrared functions. At present, most of them use metal antibacterial agents and nano tourmaline powder. Metal ion antibacterial agents mainly achieve antibacterial function through metal ion contact reaction. Metal ions can penetrate the cell membrane and enter the bacteria to react with amino or sulfhydryl groups on the proteins in the bacteria, destroying the cell protein structure and causing microbial death or loss of division and proliferation ability. Tourmaline is a cyclic silicate mineral with infrared radiation and negative ion release functions. However, these nonwoven fabrics have poor wash resistance. After repeated washing, the metal antibacterial agents and tourmaline will fall off, resulting in a significant decrease in the negative ion antibacterial and far-infrared functions of the nonwoven fabric, which greatly limits the expansion of nonwoven fabric applications. Summary of the Invention

[0003] In order to solve the technical problems mentioned in the background art, the purpose of this invention is to provide a negative ion antibacterial far-infrared nonwoven fabric and its production process.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A negative ion antibacterial far-infrared nonwoven fabric, comprising the following raw materials by weight:

[0006] 65-88 parts of polypropylene resin, 10-20 parts of composite functional additives, 1-2 parts of coupling agent, 1-3 parts of antioxidant, and 1-2 parts of lubricant;

[0007] Preparation of compound functional additives:

[0008] Step A1: Mix 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate and DMF and add them to the reaction vessel. Control the stirring rate to 200-300 r / min, heat to 40-55℃, and stir for 2-3 hours to obtain the triazole ring intermediate.

[0009] Furthermore, the ratio of 5-hexynic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF is 5-8 g: 7.5-12 g: 0.5-1 g: 50-65 mL;

[0010] 5-Hexynoic acid and p-azidobenzoic acid undergo a cycloaddition reaction catalyzed by copper acetylacetonate to form a triazole ring intermediate containing a dicarboxylic acid. The specific reaction process is as follows:

[0011]

[0012] Step A2: Take the triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide and mix them into the reaction vessel. Control the stirring rate to 400-500 r / min, heat to 80-90℃, and stir for 1-2 h to obtain the polyamide compound.

[0013] Furthermore, the ratio of the triazole ring intermediate, 2,5-diaminobenzoic acid, DCC, and dimethyl sulfoxide is 10-15 g: 5.5-8.5 g: 1-2 g: 60-80 mL;

[0014] The triazole ring intermediate and 2,5-diaminobenzoic acid undergo an amidation crosslinking reaction in the presence of a DCC catalyst. The specific reaction process is as follows:

[0015]

[0016] Step A3: Take nano tourmaline powder, polyamide compound and butanol and mix them into the reaction vessel. Control the stirring rate to 500-600 r / min, heat to 70-80℃, stir and react for 2-3 hours, then put it in an oven at 60℃ to dry for 8 hours and then ball mill to obtain the composite functional additive.

[0017] Furthermore, the ratio of nano-tourmaline powder, polyamide compound, and butanol is 10g:25-30g:60-80mL;

[0018] Preparation of a negative ion antibacterial far-infrared nonwoven fabric:

[0019] Step S1: Mix polypropylene resin, composite functional additives, coupling agents, lubricants, and antioxidants and feed them into a mixer. Control the mixing temperature at 170℃ and mix for 1 hour to obtain polypropylene preform.

[0020] Step S2: Add the polypropylene preform into the twin-screw extruder, adjust the temperature of each zone of the twin screw to 160-190℃, 190-210℃, 200-220℃, 220-230℃, 230-250℃, 240-260℃, 250-260℃, and 270-280℃, apply 70-80 r / min, and set the extrusion mass flow rate to 30-40 kg / h. After melt blending, extrusion, and granulation, the polypropylene masterbatch is obtained.

[0021] Step S3: The polypropylene masterbatch is extruded by a screw, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0022] The beneficial effects of this invention are:

[0023] This invention discloses a negative ion far-infrared nonwoven fabric, using polypropylene as the matrix material. A composite functional additive is incorporated into the blend to enhance the negative ion antibacterial far-infrared function of the polypropylene matrix material. The triazole ring structure in the composite functional additive can directly contact bacteria attached to the matrix surface, inhibiting bacterial growth and reproduction, leading to bacterial death due to metabolic disorders, effectively improving the antibacterial properties of the matrix material. Furthermore, the triazole ring in the composite functional additive can chelate and encapsulate metal ions in nano-tourmaline powder, reducing the aggregation of nano-tourmaline powder in the matrix. The composite functional additive has high compatibility with the polypropylene matrix, allowing the nano-tourmaline powder to form a relatively stable dispersion system within the polypropylene matrix, enabling the nano-tourmaline to slowly release negative ions, thus achieving long-term release of negative ion far-infrared rays.

[0024] The triazole ring in the composite functional additive has a large molecular weight and a sterically hindered aromatic ring structure on the main molecular chain, which can restrict the migration of antibacterial active groups and tourmaline. Moreover, the polyamide network structure can interpenetrate with the polypropylene matrix to form an interpenetrating network structure, which can further restrict the migration of antibacterial active groups and nano-tourmaline powder in the matrix, thereby ensuring that the polypropylene matrix can still maintain high antibacterial performance and negative ion far-infrared emission function after multiple water washings. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] The specific implementation process for preparing a negative ion antibacterial far-infrared nonwoven fabric in this embodiment is as follows:

[0028] 1) Preparation of composite functional additives

[0029] a1: 5-Hexyneic acid, p-azidobenzoic acid, copper acetylacetonate and DMF were mixed and added to a reaction vessel. The stirring rate was controlled at 200 r / min, the temperature was raised to 40℃, and the reaction was stirred for 2 h to obtain a triazole ring intermediate. In the above reaction, the ratio of 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate and DMF was 5 g: 7.5 g: 0.5 g: 50 mL.

[0030] a2: The triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide were mixed and fed into a reaction vessel. The stirring rate was controlled at 400 r / min, the temperature was raised to 80℃, and the reaction was stirred for 1 h to obtain a polyamide compound. In the above reaction, the ratio of the amount of triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide was 10 g: 5.5 g: 1 g: 60 mL.

[0031] a3: Nano tourmaline powder, polyamide compound and butanol were mixed and fed into a reaction vessel. The stirring rate was controlled at 500 r / min, the temperature was raised to 70℃, and the reaction was stirred for 2 hours. After drying in an oven at 60℃ for 8 hours, the mixture was ball-milled to obtain the composite functional additive. In the above reaction, the ratio of nano tourmaline powder, polyamide compound and butanol was 10 g: 25 g: 60 mL.

[0032] 2) Preparation of negative ion antibacterial far-infrared nonwoven fabric

[0033] s1: 32.5 kg of polypropylene resin, 5 kg of composite functional additives, 0.5 kg of coupling agent (in this example and comparative example, vinyltrimethoxysilane from Shanghai Chuangsai Technology Co., Ltd. was used), 0.5 kg of lubricant (in this example and comparative example, soft textile auxiliary agent from Dongguan Jianmeng Chemical Co., Ltd., model KF-69 was used), and 0.5 kg of antioxidant (in this example and comparative example, antioxidant 1010 from Shanghai Aladdin Biochemical Technology Co., Ltd. was used) were mixed and fed into a mixer. The mixing temperature was controlled at 170℃, and after mixing for 1 hour, polypropylene preform was obtained.

[0034] s2: Add polypropylene preform to a twin-screw extruder, adjust the temperature of each zone of the twin screw to 160℃, 190℃, 200℃, 220℃, 230℃, 240℃, 250℃, and 270℃, apply 70 r / min, and the extrusion mass flow rate is 30 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained.

[0035] S3: Polypropylene masterbatch is extruded by screw extrusion, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0036] Example 2

[0037] The specific implementation process for preparing a negative ion antibacterial far-infrared nonwoven fabric in this embodiment is as follows:

[0038] 1) Preparation of composite functional additives

[0039] a1: 5-Hexyneic acid, p-azidobenzoic acid, copper acetylacetonate and DMF were mixed and added to a reaction vessel. The stirring rate was controlled at 300 r / min, the temperature was raised to 55℃, and the reaction was stirred for 3 h to obtain a triazole ring intermediate. In the above reaction, the ratio of 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate and DMF was 8 g: 12 g: 1 g: 65 mL.

[0040] a2: The triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide were mixed and added to a reaction vessel. The stirring rate was controlled at 500 r / min, the temperature was raised to 90℃, and the reaction was stirred for 2 h to obtain a polyamide compound. In the above reaction, the ratio of the amount of triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide was 15 g: 8.5 g: 2 g: 80 mL.

[0041] a3: Take nano-tourmaline powder, polyamide compound and butanol and mix them into a reaction vessel. Control the stirring speed to 600 r / min, heat to 80℃, stir and react for 3 h, then put it into an oven at 60℃ and dry for 8 h, and then ball mill to obtain the composite functional additive; In the above reaction, the ratio of nano-tourmaline powder, polyamide compound and butanol is 10 g: 30 g: 80 mL;

[0042] 2) Preparation of negative ion antibacterial far-infrared nonwoven fabric

[0043] s1: Mix 44kg of polypropylene resin, 8kg of composite functional additives, 0.8kg of coupling agent, 1kg of lubricant, and 1.5kg of antioxidant into a mixer, control the mixing temperature at 170℃, and mix for 1 hour to obtain polypropylene billet.

[0044] s2: Add the polypropylene preform into the twin-screw extruder, adjust the temperature of each zone of the twin screw to 190℃, 210℃, 220℃, 230℃, 250℃, 260℃, 260℃, and 280℃, apply 80 r / min, and the extrusion mass flow rate is 40 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained.

[0045] S3: Polypropylene masterbatch is extruded by screw extrusion, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0046] Example 3

[0047] The specific implementation process for preparing a negative ion antibacterial far-infrared nonwoven fabric in this embodiment is as follows:

[0048] 1) Preparation of composite functional additives

[0049] 1: Mix 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF and add them to a reaction vessel. Control the stirring rate at 200 r / min, raise the temperature to 40℃, and stir for 2 h to obtain a triazole ring intermediate. In the above reaction, the ratio of 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF is 8 g: 12 g: 1 g: 65 mL.

[0050] a2: The triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide were mixed and added to a reaction vessel. The stirring rate was controlled at 400 r / min, the temperature was raised to 80℃, and the reaction was stirred for 1 h to obtain a polyamide compound. In the above reaction, the ratio of the amount of triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide was 15 g: 8.5 g: 2 g: 80 mL.

[0051] a3: Nano tourmaline powder, polyamide compound and butanol were mixed and fed into a reaction vessel. The stirring rate was controlled at 500 r / min, the temperature was raised to 70℃, and the reaction was stirred for 2 hours. After drying in an oven at 60℃ for 8 hours, the mixture was ball-milled to obtain the composite functional additive. In the above reaction, the ratio of nano tourmaline powder, polyamide compound and butanol was 10 g: 30 g: 80 mL.

[0052] 2) Preparation of negative ion antibacterial far-infrared nonwoven fabric

[0053] s1: Mix 44kg of polypropylene resin, 10kg of composite functional additives, 1kg of coupling agent, 1kg of lubricant and 1.5kg of antioxidant into a mixer, control the mixing temperature at 170℃, and mix for 1 hour to obtain polypropylene billet.

[0054] s2: Add polypropylene preform to a twin-screw extruder, adjust the temperature of each zone of the twin screw to 160℃, 190℃, 200℃, 220℃, 230℃, 240℃, 250℃, and 270℃, apply 70 r / min, and the extrusion mass flow rate is 30 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained.

[0055] S3: Polypropylene masterbatch is extruded by screw extrusion, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0056] Example 4

[0057] The specific implementation process for preparing a negative ion antibacterial far-infrared nonwoven fabric in this embodiment is as follows:

[0058] 1) Preparation of composite functional additives

[0059] 1. Mix 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF and add them to a reaction vessel. Control the stirring rate at 250 r / min, raise the temperature to 45℃, and stir for 2.5 h to obtain a triazole ring intermediate. In the above reaction, the ratio of 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF is 6 g: 9 g: 0.7 g: 55 mL.

[0060] a2: The triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide were mixed and fed into a reaction vessel. The stirring rate was controlled at 450 r / min, the temperature was raised to 85℃, and the reaction was stirred for 1.5 h to obtain the polyamide compound. In the above reaction, the ratio of the amount of triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide was 12 g: 7 g: 1.5 g: 70 mL.

[0061] a3: Nano tourmaline powder, polyamide compound and butanol were mixed and fed into a reaction vessel. The stirring rate was controlled at 550 r / min, the temperature was raised to 75℃, and the reaction was stirred for 2.5 h. After drying in an oven at 60℃ for 8 h, the mixture was ball-milled to obtain the composite functional additive. In the above reaction, the ratio of nano tourmaline powder, polyamide compound and butanol was 10 g: 28 g: 70 mL.

[0062] 2) Preparation of negative ion antibacterial far-infrared nonwoven fabric

[0063] s1: Mix 40kg of polypropylene resin, 5kg of composite functional additives, 0.5kg of coupling agent, 2kg of lubricant, and 2kg of antioxidant into a mixer, control the mixing temperature at 170℃, and mix for 1 hour to obtain polypropylene billet.

[0064] s2: Add polypropylene preform to a twin-screw extruder, adjust the temperature of each zone of the twin screw to 160℃, 190℃, 200℃, 220℃, 230℃, 240℃, 250℃, and 270℃, apply 70 r / min, and the extrusion mass flow rate is 30 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained.

[0065] S3: Polypropylene masterbatch is extruded by screw extrusion, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0066] Example 5

[0067] The specific implementation process for preparing a negative ion antibacterial far-infrared nonwoven fabric in this embodiment is as follows:

[0068] 1) Preparation of composite functional additives

[0069] 1: Mix 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF and add them to a reaction vessel. Control the stirring rate at 250 r / min, raise the temperature to 45℃, and stir for 2.5 h to obtain a triazole ring intermediate. In the above reaction, the ratio of 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF is 8 g: 12 g: 1 g: 65 mL.

[0070] a2: The triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide were mixed and fed into a reaction vessel. The stirring rate was controlled at 450 r / min, the temperature was raised to 85℃, and the reaction was stirred for 1.5 h to obtain the polyamide compound. In the above reaction, the ratio of the amount of triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide was 15 g: 8.5 g: 1 g: 60 mL.

[0071] a3: Nano tourmaline powder, polyamide compound and butanol were mixed and fed into a reaction vessel. The stirring rate was controlled at 550 r / min, the temperature was raised to 75℃, and the reaction was stirred for 2.5 h. After drying in an oven at 60℃ for 8 h, the mixture was ball-milled to obtain the composite functional additive. In the above reaction, the ratio of nano tourmaline powder, polyamide compound and butanol was 10 g: 30 g: 70 mL.

[0072] 2) Preparation of negative ion antibacterial far-infrared nonwoven fabric

[0073] s1: Mix 44kg of polypropylene resin, 10kg of composite functional additives, 1kg of coupling agent, 1kg of lubricant, and 1kg of antioxidant and feed them into a mixer. Control the mixing temperature at 170℃ and mix for 1 hour to obtain polypropylene billet.

[0074] s2: Add polypropylene preform to a twin-screw extruder, adjust the temperature of each zone of the twin screw to 160℃, 190℃, 200℃, 220℃, 230℃, 240℃, 250℃, and 270℃, apply 70 r / min, and the extrusion mass flow rate is 30 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained.

[0075] S3: Polypropylene masterbatch is extruded by screw extrusion, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0076] Comparative Example 1

[0077] The specific process for preparing a negative ion antibacterial far-infrared nonwoven fabric in this comparative example is as follows:

[0078] S1: 32.5 kg of polypropylene resin, 1.5 kg of negative ion far-infrared powder (for this comparative example, nano negative ion far-infrared powder from Baijingjieershuang High Technology Co., Ltd., model JLSUN900), 5 kg of silver antibacterial agent (for this comparative example, silver ion antibacterial agent from Suzhou Shixin Chemical Co., Ltd.), 0.5 kg of coupling agent, 0.5 kg of lubricant, and 0.5 kg of antioxidant were mixed and fed into a mixer. The mixing temperature was controlled at 170℃, and after mixing for 1 hour, polypropylene billet was obtained.

[0079] s2: Add polypropylene preform to a twin-screw extruder, adjust the temperature of each zone of the twin screw to 160℃, 190℃, 200℃, 220℃, 230℃, 240℃, 250℃, and 270℃, apply 70 r / min, and the extrusion mass flow rate is 30 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained.

[0080] S3: Polypropylene masterbatch is extruded by screw extrusion, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0081] Comparative Example 2

[0082] The specific process for preparing a negative ion antibacterial far-infrared nonwoven fabric in this comparative example is as follows:

[0083] s1: Mix 44kg of polypropylene resin, 1.5kg of negative ion far-infrared powder, 5kg of silver antibacterial agent, 1kg of coupling agent, 1kg of lubricant, and 1.5kg of antioxidant into a mixer, control the mixing temperature at 170℃, and mix for 1 hour to obtain polypropylene billet.

[0084] s2: Add the polypropylene preform into the twin-screw extruder, adjust the temperature of each zone of the twin screw to 190℃, 210℃, 220℃, 230℃, 250℃, 260℃, 260℃, and 280℃, apply 80 r / min, and the extrusion mass flow rate is 40 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained.

[0085] S3: Polypropylene masterbatch is extruded by screw extrusion, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

[0086] To test the relevant properties of the negative ion antibacterial far-infrared nonwoven fabric, the negative ion antibacterial far-infrared nonwoven fabrics prepared in Examples 1-5 and Comparative Examples 1-2 were subjected to relevant performance tests. The specific test results are shown in Table 1.

[0087] Water-resistant antibacterial performance test:

[0088] 1g of the negative ion antibacterial far-infrared nonwoven fabric samples prepared in Examples 1-5 and Comparative Examples 1-2 were placed in a mesh bag and then placed in 1L of washing solution (pH 2.0-4.5) containing 10g / L of acidic detergent. The temperature was raised to 40℃, and the fabric was magnetically stirred and washed for 20min, then washed with water for 20min, and dried at 80℃ as one cycle. After 10, 20, and 30 cycles, the antibacterial effect of the negative ion antibacterial far-infrared nonwoven fabric on Staphylococcus aureus, Escherichia coli, and Candida albicans was tested according to AATCC100-2004.

[0089]

[0090] As shown in Table 1, the negative ion antibacterial far-infrared nonwoven fabrics prepared in Examples 1-5 exhibited an antibacterial rate of over 85% against Staphylococcus aureus, over 82% against Escherichia coli, and over 82% against Candida albicans after 30 washes. In contrast, the negative ion antibacterial far-infrared nonwoven fabrics prepared in Comparative Examples 1-2 only achieved an antibacterial rate of over 62% against Staphylococcus aureus, Escherichia coli, and Candida albicans. This indicates that the negative ion antibacterial far-infrared nonwoven fabrics prepared in Examples 1-5 can maintain good antibacterial properties even after 30 washes.

[0091] To test the relevant properties of the negative ion antibacterial far-infrared nonwoven fabric, the negative ion antibacterial far-infrared nonwoven fabrics prepared in Examples 1-5 and Comparative Examples 1-2 were subjected to relevant performance tests. The specific test results are shown in Table 2.

[0092] Water-resistant negative ion release test:

[0093] The sample was placed on a mesh bag and immersed in 1L of washing solution (pH 2.0-4.5) containing 10g / L of acidic detergent. The temperature was raised to 40℃, and the sample was magnetically stirred and washed for 20 minutes, followed by water washing for 20 minutes. The sample was then dried at 80℃. This was repeated 10, 20, and 30 times. The negative ion release was then tested according to GB / T30128-2013.

[0094] Table 2

[0095]

[0096]

[0097] As shown in Table 2, the negative ion release amount of the negative ion antibacterial far-infrared nonwoven fabrics prepared in Examples 1-5 is 1209-1510 ions / cm³. 3Compared to the negative ion antibacterial far-infrared nonwoven fabrics prepared in Comparative Examples 1-2, the negative ion release amount of the fabrics prepared in Examples 1-5 was not significantly different. However, after 30 washes, the negative ion release amount of the fabrics prepared in Examples 1-5 could still be maintained at 1000 ions / cm³. 3 However, the negative ion antibacterial far-infrared nonwoven fabrics prepared in Comparative Examples 1-2 all showed a significant decrease in performance after 30 washes.

[0098] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0099] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A negative ion antibacterial far-infrared nonwoven fabric, comprising, by weight, 65-88 parts of polypropylene resin, 10-20 parts of composite functional additives, 1-2 parts of coupling agent, 1-3 parts of antioxidant and 1-2 parts of lubricant; Preparation of compound functional additives: Step A1: Mix 5-hexyneic acid, p-azidobenzoic acid, copper acetylacetonate and DMF, heat to 40-55℃, stir and react for 2-3 hours to obtain the triazole ring intermediate; Step A2: Take the triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide, mix and feed them into the mixture, heat to 80-90℃, stir and react for 1-2 hours to obtain the polyamide compound; Step A3: Mix nano-tourmaline powder, polyamide compound and butanol, heat to 70-80℃, stir and react for 2-3 hours, dry in an oven at 60℃ for 8 hours, and then ball mill to obtain composite functional additives. In step A1, the ratio of 5-hexynic acid, p-azidobenzoic acid, copper acetylacetonate, and DMF is 5-8g: 7.5-12g: 0.5-1g: 50-65mL. In step A2, the ratio of the triazole ring intermediate, 2,5-diaminobenzoic acid, DCC and dimethyl sulfoxide is 10-15g: 5.5-8.5g: 1-2g: 60-80mL. The ratio of nano-tourmaline powder, polyamide compound, and butanol is 10g:25-30g:60-80mL.

2. A production process for producing the negative ion antibacterial far-infrared nonwoven fabric according to claim 1, characterized in that, Includes the following steps: Step S1: Mix and feed polypropylene resin, composite functional additives, coupling agents, lubricants and antioxidants, control the mixing temperature at 170℃, and mix for 1 hour to obtain polypropylene preform. Step S2: Add the polypropylene preform into the twin-screw extruder, adjust the temperature of each zone of the twin screw, apply 70-80 r / min, and the extrusion mass flow rate is 30-40 kg / h. After melt blending, extrusion, and granulation, polypropylene masterbatch is obtained. Step S3: The polypropylene masterbatch is extruded by a screw, melted, then filtered, spun, drawn, formed into a web, hot-rolled into fabric, wound, slit and packaged to obtain negative ion antibacterial far-infrared nonwoven fabric.

3. The production process of a negative ion antibacterial far-infrared nonwoven fabric according to claim 2, characterized in that, The ratio of compound functional additives to coupling agents is 10:

1.

4. The production process of a negative ion antibacterial far-infrared nonwoven fabric according to claim 2, characterized in that, The temperature settings for each zone of the twin-screw extruder are 160-190℃, 190-210℃, 200-220℃, 220-230℃, 230-250℃, 240-260℃, 250-260℃, and 270-280℃.

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