CN114318671A - A kind of preparation method of hygroscopic and antibacterial spunlace non-woven fabric - Google Patents

Abstract

The invention discloses a preparation method of a moisture-absorbing and bacteriostatic spunlace non-woven fabric. The spunlace non-woven fabric comprises, by weight, 25-30 parts of acetate fibers, 25-30 parts of polylactic acid fibers, 50-60 parts of polyethylene fibers, 1-3 parts of antioxidants and 1-3 parts of flame retardants; the acetate fiber is mainly prepared by the reaction of cellulose acetate, succinic anhydride and polydopamine; after the polylactic acid fiber is swelled, lysozyme is loaded. The preparation method comprises the steps of firstly using antioxidant and flame retardant solution to carry out impregnation treatment on polyethylene fibers, acetate fibers and polylactic acid fibers, then laying four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, and carrying out double spunlace reinforcement to obtain the spunlace non-woven fabric. The spunlace non-woven fabric prepared by the invention has the advantages of good comprehensive performance, good antibacterial property, moisture absorption, strength and toughness, and is particularly suitable for clothes fabrics.

Description

A kind of preparation method of spunlace non-woven fabric of moisture absorption and bacteriostasis

technical field

The invention relates to the technical field of spunlace non-woven fabric processing, in particular to a preparation method of a hygroscopic and bacteriostatic spunlace non-woven fabric.

Background technique

The spunlace non-woven fabric is sprayed by high-pressure fine water flow to any one of silk, bamboo fiber, wood pulp fiber, seaweed fiber, polyester, nylon, polypropylene, viscose fiber, chitin fiber, microfiber, tencel, glass fiber. One or more layers of fiber nets composed of one or more kinds of fibers are entangled with each other, and the fiber nets are reinforced by external force to have a certain mechanical strength, and the final fabric is a spunlace non-woven fabric. The principle of spunlace reinforcing fiber web is similar to the needle punching process, the difference is that the spunlace non-woven fabric does not need needles, but uses multiple fine water jets generated by high pressure - spunlace machine to spray the fiber web. After the water jet passes through the fiber web, it is supported by the rebound of the mesh curtain and penetrates the fiber web again. As a result, the fibers in the fiber web are displaced, interspersed, entangled and cohesive under the hydraulic action of the high-speed water jets in different directions. The fiber web is reinforced.

Because the appearance of spunlace non-woven fabric is closer to that of traditional textiles than other non-woven materials, it has high strength, low fluff, high hygroscopicity, rapid moisture absorption, good air permeability, soft hand feeling, good drapability, changeable appearance pattern, no need to stick It has many advantages such as mixture reinforcement and washability. Since its listing, it has been deeply loved by all walks of life. At present, it has been widely used in medical curtains, surgical gowns, surgical cover cloths, medical dressing materials, wound dressings, medical gauze, aviation rags, clothing lining fabrics, coated base fabrics, disposable materials, advanced instrument rags, electronic Industry advanced rags, towels, cotton pads, wet wipes, mask covering materials, etc. At this stage, as people's quality requirements and functional requirements for clothing fabrics are getting higher and higher, multi-functional fabrics with excellent comprehensive performance have gradually become a development trend.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a spunlace nonwoven fabric with moisture absorption and bacteriostasis and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a four-layer fiber web composed of polyethylene fiber-acetate fiber-polylactic acid fiber-polyethylene fiber, a hygroscopic and bacteriostatic spunlace non-woven fabric is double spunlace Reinforced.

Further, the polyethylene fibers, acetate fibers and polylactic acid fibers are impregnated with solutions of antioxidants and flame retardants before spunlace reinforcement.

Further, the weight parts of each raw material are 25-30 parts of acetate fibers, 25-30 parts of polylactic acid fibers, 50-60 parts of polyethylene fibers, 1-3 parts of antioxidants, and 1-3 parts of flame retardants.

Further, the cellulose acetate is mainly prepared by reacting cellulose acetate, succinic anhydride and polydopamine.

Further, the antioxidant is any one or more of pentaerythritol ester, phosphite, thiodipropionate antioxidants; the flame retardant is melamine, melamine urethane, melamine Any one or more of phosphates.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

(1) Preparation of acetate fiber:

(2) Polylactic acid fiber pretreatment:

(3) Preparation of finished spunlace non-woven fabrics.

Further, a preparation method of a hygroscopic and bacteriostatic spunlace nonwoven fabric comprises the following steps;

(1) Preparation of cellulose acetate: dissolving cellulose acetate in an acetone solvent, adding anhydrous ethanol solution, standing to form a precipitate, and removing the upper layer solution by suction filtration to obtain pretreated cellulose acetate;

Dissolve the pretreated cellulose acetate in the acetone solution, add succinic anhydride and triethylamine, stir, raise the temperature to 65-70°C, react, add anhydrous ethanol solution, let stand to form a precipitate, remove impurities by suction filtration, and dry , to obtain carboxylated cellulose acetate;

Dissolving carboxylated cellulose acetate in dimethylformamide solvent, adding polydopamine solution, stirring evenly, adding concentrated sulfuric acid solution dropwise, reacting, filtering, washing with deionized water, and spinning to obtain cellulose acetate;

(2) Polylactic acid fiber pretreatment: immerse the polylactic acid fiber in sodium hydroxide solution, heat it in water, and swell; filter to remove the sodium hydroxide solution, rinse with deionized water, and add lysozyme buffer to the swollen polylactic acid fiber, Let stand to obtain the polylactic acid fiber loaded with lysozyme, for use;

(3) Preparation of finished spunlace non-woven fabric: in a dust-free environment, take the acetate fibers obtained in step (1), the polylactic acid fibers and polyethylene fibers treated in step (2) and soak them in antioxidants and flame retardants In the solution, filtered, dried, combed into single fibers, laid four layers of fiber webs in the order of polyethylene fiber-acetate fiber-polylactic acid fiber-polyethylene fiber, carded horizontally, and drafted and leveled the fiber web. Spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying, and winding to obtain a hygroscopic and bacteriostatic spunlace non-woven product.

Further, a preparation method of a hygroscopic and bacteriostatic spunlace nonwoven fabric comprises the following steps;

(1) Preparation of cellulose acetate: dissolve cellulose acetate in acetone solvent, raise the temperature to 65-70°C, stir evenly, cool down to 27-32°C, add anhydrous ethanol solution, let stand to form a precipitate, and remove by suction filtration upper layer solution to obtain pretreated cellulose acetate;

Dissolve the pretreated cellulose acetate in the acetone solution, add succinic anhydride and triethylamine, stir, raise the temperature to 65-70°C, react for 20-24h, cool down to 27-32°C, add anhydrous ethanol solution, and let Set to form a precipitate, remove impurities by suction filtration, and dry to obtain carboxylated cellulose acetate;

Dissolve carboxylated cellulose acetate in dimethylformamide solvent, add polydopamine solution, stir evenly, add concentrated sulfuric acid solution dropwise, temperature is 70-80 ℃, react for 20-30min, filter, wash with deionized water, spin to obtain cellulose acetate;

(2) Polylactic acid fiber pretreatment: immerse the polylactic acid fiber in 5mol/L sodium hydroxide solution, heat it in water, control the temperature to 70-80℃, and swell for 30-40min; filter to remove the sodium hydroxide solution, deionize Rinse with water, cool down to 20-25°C, add lysozyme buffer to the swollen polylactic acid fibers, and let stand for 40-60 min to obtain lysozyme-loaded polylactic acid fibers for use;

(3) Preparation of finished spunlace non-woven fabric: in a dust-free environment, take the acetate fibers obtained in step (1), the polylactic acid fibers and polyethylene fibers treated in step (2) and soak them in antioxidants and flame retardants In the solution, filtered, dried, combed into single fibers, laid four layers of fiber webs in the order of polyethylene fiber-acetate fiber-polylactic acid fiber-polyethylene fiber, carded horizontally, and drafted and leveled the fiber web. Spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying, and winding to obtain a hygroscopic and bacteriostatic spunlace non-woven product.

Further, in the step (2), the lysozyme buffer is prepared by mixing lysozyme and 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution; The pH value is 7.0-7.5; the volume ratio of the lysozyme and the 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 2:1.

Further, the process conditions of the spunlace in the step (3) are: 3-5 spunlace heads are used in the spunlace reinforcement process, the spunlace pressure is 30-45Mpa, and 2-3 spunlace heads are used in the secondary spunlace reinforcement process. Spunlace head, the spunlace pressure is 5-15Mpa.

Compared with the prior art, the beneficial effects achieved by the present invention are:

The invention adopts main polyethylene fibers, acetate fibers and polylactic acid fibers, and is reinforced by double spunlace to prepare a spunlace nonwoven having a four-layer structure of polyethylene fiber layer-acetate fiber layer-polylactic acid fiber layer-polyethylene fiber layer. cloth. Compared with natural fibers such as cotton and linen, acetate fiber has good moisture absorption, air permeability and resilience, does not have static electricity and hair balls, and is comfortable against the skin, making it suitable for making clothes. However, the strength of cellulose acetate is low, and it is easy to break and has poor wear resistance when pulled hard; in the present invention, in order to improve this problem, the cellulose acetate is first subjected to carboxylation treatment, and the carboxylated cellulose acetate can interact with the surface of polydopamine. The active hydroxyl groups form a bridged structure, which has stronger interfacial bonding force with acetate fibers, increased molecular area, and improved toughness and wear resistance; while in conventional technology, polydopamine impregnated fibers, or dopamine hydrochloride polymerized on fibers In this way, polydopamine is coated on the fiber membrane, but in these two methods, the binding force between polydopamine and fiber membrane is weak, which is easy to cause falling off; because polydopamine molecule contains multiple rigid structures of benzene rings, its structure Introduced into fiber molecules, it can improve the mechanical strength of acetate fiber.

The spunlace non-woven fabric prepared by the invention includes four layers, which are polyethylene fiber layer-acetate fiber layer-polylactic acid fiber layer-polyethylene fiber layer in sequence, and polyethylene fiber has the advantages of strong thermal stability, high mechanical strength and toughness, This is used as the outermost layer to protect the intermediate acetate fiber layer and the polylactic acid fiber layer.

Polylactic acid is a widely used biodegradable polymer material, which can be gradually degraded into water and carbon dioxide in nature without pollution to the environment. In addition, polylactic acid can be used as a carrier for immobilizing biological enzymes and has good biocompatibility. Lysozyme can efficiently hydrolyze peptidoglycan, the main component of bacterial cell wall. After the cell wall is ruptured, bacteria cannot carry out normal growth activities, so they gradually die out to achieve bacteriostatic and bactericidal effects; Changes in metal ions and pH will directly affect the activity of enzymes. Therefore, in the present invention, lysozyme is loaded into the polylactic acid fiber, and sodium hydroxide solution is used to swell the polylactic acid fiber before loading, so as to improve the porosity, specific surface area and permeability of the polylactic acid fiber, thus increasing the lysozyme in the polylactic acid fiber. Loading in PLA fibers. Polylactic acid fiber can play the role of solidifying lysozyme, reduce the damage of lysozyme by other external factors, and achieve lasting and efficient bacteriostasis and sterilization. In addition, in the process of preparing the non-woven fabric, the spunlace process is adopted. Compared with the melt blowing and thermal lamination processes, the temperature of the spunlace process is lower than 35 °C, which also avoids the risk of high temperature inactivation of lysozyme.

The spunlace non-woven fabric prepared by the invention has the following comprehensive properties: good antibacterial property, hygroscopicity, strength and toughness, and is especially suitable for clothing fabrics.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

The spunlace non-woven fabric is obtained by double spunlace reinforcement of composite fibers; the composite fibers include the following raw materials by weight, 25 parts of acetate fibers, 25 parts of polylactic acid fibers, 50 parts of polyethylene fibers, 1 part of antioxidant, flame retardant 1 dose.

The antioxidant is pentaerythritol ester, and the flame retardant is melamine.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

(1) Preparation of cellulose acetate: dissolve cellulose acetate in acetone solvent, raise the temperature to 65°C, stir evenly, cool down to 27°C, add anhydrous ethanol solution, let stand to form a precipitate, and remove the upper layer solution by suction filtration to obtain pretreated cellulose acetate;

Dissolve the pretreated cellulose acetate in the acetone solution, add succinic anhydride and triethylamine, stir, raise the temperature to 65 °C, react for 20 h, cool down to 27 °C, add anhydrous ethanol solution, let stand to form a precipitate, and filter with suction Remove impurities and dry to obtain carboxylated cellulose acetate;

Dissolve carboxylated cellulose acetate in dimethylformamide solvent, add polydopamine solution, stir evenly, add concentrated sulfuric acid solution dropwise at 70°C, react for 20 minutes, filter, wash with deionized water, and spin to obtain acetate fiber;

(2) Polylactic acid fiber pretreatment: immerse the polylactic acid fiber in 5mol/L sodium hydroxide solution, heat it in water, control the temperature to 70°C, and swell for 30min; filter to remove the sodium hydroxide solution, rinse with deionized water, and cool down to 20°C, add lysozyme buffer to the swollen polylactic acid fibers, and let stand for 40 min to obtain lysozyme-loaded polylactic acid fibers for use;

The lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 7.0; the lysozyme and The volume ratio of 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 2:1;

(3) Preparation of finished spunlace non-woven fabric: in a dust-free environment, take the acetate fibers obtained in step (1), the polylactic acid fibers and polyethylene fibers treated in step (2) and soak them in antioxidants and flame retardants In the solution, filtered, dried, combed into single fibers, laid four layers of fiber webs in the order of polyethylene fiber-acetate fiber-polylactic acid fiber-polyethylene fiber, carded horizontally, and drafted and leveled the fiber web. Spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying, and winding to obtain a hygroscopic and bacteriostatic spunlace non-woven product.

The technological conditions of spunlace are as follows: 3 spunlace heads are used in the spunlace reinforcement process, the spunlace pressure is 30Mpa, and two spunlace heads are used in the secondary spunlace reinforcement process, and the spunlace pressure is 5Mpa.

Example 2

The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fibers include the following raw materials by weight, 27 parts of acetate fibers, 27 parts of polylactic acid fibers, 55 parts of polyethylene fibers, 2 parts of antioxidants, flame retardant 1 dose.

The antioxidant is phosphite, and the flame retardant is melamine urethane cyanate.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

(1) Preparation of cellulose acetate: dissolve cellulose acetate in acetone solvent, raise the temperature to 67°C, stir evenly, cool down to 30°C, add anhydrous ethanol solution, let stand to form a precipitate, remove the upper layer solution by suction filtration, and obtain pretreated cellulose acetate;

Dissolve the pretreated cellulose acetate in the acetone solution, add succinic anhydride and triethylamine, stir, raise the temperature to 67°C, react for 22h, cool down to 30°C, add anhydrous ethanol solution, let stand to form a precipitate, and filter with suction Remove impurities and dry to obtain carboxylated cellulose acetate;

Dissolve carboxylated cellulose acetate in dimethylformamide solvent, add polydopamine solution, stir evenly, add concentrated sulfuric acid solution dropwise at 75°C, react for 25 minutes, filter, wash with deionized water, and spin to obtain acetate fiber;

(2) Polylactic acid fiber pretreatment: immerse the polylactic acid fiber in 5mol/L sodium hydroxide solution, heat it in water, control the temperature to 75°C, and swell for 35min; filter to remove the sodium hydroxide solution, rinse with deionized water, and cool down to 22° C., add lysozyme buffer to the swollen polylactic acid fibers, and let stand for 50 min to obtain lysozyme-loaded polylactic acid fibers for use;

The lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 7.3; the lysozyme and The volume ratio of 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 2:1;

(3) Preparation of finished spunlace non-woven fabric: in a dust-free environment, take the acetate fibers obtained in step (1), the polylactic acid fibers and polyethylene fibers treated in step (2) and soak them in antioxidants and flame retardants In the solution, filtered, dried, combed into single fibers, laid four layers of fiber webs in the order of polyethylene fiber-acetate fiber-polylactic acid fiber-polyethylene fiber, carded horizontally, and drafted and leveled the fiber web. Spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying, and winding to obtain a hygroscopic and bacteriostatic spunlace non-woven product.

The technological conditions of spunlace are: 4 spunlace heads are used in the spunlace reinforcement process, the spunlace pressure is 40Mpa, and 3 spunlace heads are used in the secondary spunlace reinforcement process, and the spunlace pressure is 8Mpa.

Example 3

The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fibers include the following raw materials by weight, 30 parts of acetate fibers, 30 parts of polylactic acid fibers, 60 parts of polyethylene fibers, 3 parts of antioxidants, flame retardant 3 doses.

The antioxidant is phosphite, and the flame retardant is melamine.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

(1) Preparation of cellulose acetate: dissolve cellulose acetate in acetone solvent, raise the temperature to 70°C, stir evenly, cool down to 32°C, add anhydrous ethanol solution, let stand to form a precipitate, and remove the upper layer solution by suction filtration to obtain pretreated cellulose acetate;

Dissolve the pretreated cellulose acetate in the acetone solution, add succinic anhydride and triethylamine, stir, raise the temperature to 70 °C, react for 24 h, cool down to 32 °C, add anhydrous ethanol solution, let stand to form a precipitate, and filter with suction Remove impurities and dry to obtain carboxylated cellulose acetate;

Dissolve carboxylated cellulose acetate in dimethylformamide solvent, add polydopamine solution, stir evenly, dropwise add concentrated sulfuric acid solution, the temperature is 80 ° C, react for 30 min, filter, wash with deionized water, and spin to obtain acetate fiber;

(2) Polylactic acid fiber pretreatment: immerse the polylactic acid fiber in 5mol/L sodium hydroxide solution, heat it in water, control the temperature to 80°C, and swell for 40min; filter to remove the sodium hydroxide solution, rinse with deionized water, and cool down At 25°C, add lysozyme buffer to the swollen polylactic acid fibers, and let stand for 60 min to obtain lysozyme-loaded polylactic acid fibers for use;

The lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 7.5; the lysozyme and The volume ratio of 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 2:1;

(3) Preparation of finished spunlace non-woven fabric: in a dust-free environment, take the acetate fibers obtained in step (1), the polylactic acid fibers and polyethylene fibers treated in step (2) and soak them in antioxidants and flame retardants In the solution, filtered, dried, combed into single fibers, laid four layers of fiber webs in the order of polyethylene fiber-acetate fiber-polylactic acid fiber-polyethylene fiber, carded horizontally, and drafted and leveled the fiber web. Spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying, and winding to obtain a hygroscopic and bacteriostatic spunlace non-woven product.

The technological conditions of spunlace are as follows: 5 spunlace heads are used in the spunlace reinforcement process, the spunlace pressure is 45Mpa, and 3 spunlace heads are used in the secondary spunlace reinforcement process, and the spunlace pressure is 15Mpa.

Comparative Example 1

The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fibers include the following raw materials by weight, 27 parts of acetate fibers, 27 parts of polylactic acid fibers, 55 parts of polyethylene fibers, 2 parts of antioxidants, flame retardant 1 dose.

The antioxidant is phosphite, and the flame retardant is melamine urethane cyanate.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

(1) Preparation of cellulose acetate: dissolve cellulose acetate in acetone solvent, raise the temperature to 67°C, stir evenly, cool down to 30°C, add anhydrous ethanol solution, let stand to form a precipitate, remove the upper layer solution by suction filtration, and obtain Pretreatment of cellulose acetate, adding cellulose acetate to polydopamine solution, shaking to remove unreacted polydopamine solution, spinning to obtain acetate fiber;

The rest of the steps are the same as in Example 2.

Comparative Example 2

The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fibers include the following raw materials by weight, 27 parts of acetate fibers, 27 parts of polylactic acid fibers, 55 parts of polyethylene fibers, 2 parts of antioxidants, flame retardant 1 dose.

The antioxidant is phosphite, and the flame retardant is melamine urethane cyanate.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

(1) Same as Example 2

(2) Polylactic acid fiber pretreatment: add lysozyme buffer to polylactic acid fiber, and let stand for 50 minutes to obtain lysozyme-loaded polylactic acid fiber for use;

The lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 7.3; the lysozyme and The volume ratio of 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 2:1;

(3) Same as Example 2

Comparative Example 3

The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fibers include the following raw materials by weight, 27 parts of acetate fibers, 27 parts of polylactic acid fibers, 55 parts of polyethylene fibers, 2 parts of antioxidants, flame retardant 1 dose.

The antioxidant is phosphite, and the flame retardant is melamine urethane cyanate.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

The spunlace process was replaced by a thermal spray melting process, and the remaining contents were the same as those in Example 2.

Comparative Example 4

The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fibers include the following raw materials by weight, 27 parts of acetate fibers, 27 parts of polylactic acid fibers, 55 parts of polyethylene fibers, 2 parts of antioxidants, flame retardant 1 dose.

The antioxidant is phosphite, and the flame retardant is melamine urethane cyanate.

A preparation method of a hygroscopic and antibacterial spunlace non-woven fabric, comprising the following steps;

Step (1) and step (2) are the same as in Example 2;

(3) Preparation of finished spunlace non-woven fabric: in a dust-free environment, take the acetate fibers obtained in step (1), the polylactic acid fibers and polyethylene fibers treated in step (2) and soak them in antioxidants and flame retardants In the solution, filter, dry, comb into single fibers, mix and lay fiber webs, laterally card, draw and level the fiber webs, spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying, winding, The finished spunlace non-woven fabric with moisture absorption and bacteriostasis is obtained.

The technological conditions of spunlace are: 4 spunlace heads are used in the spunlace reinforcement process, the spunlace pressure is 40Mpa, and 3 spunlace heads are used in the secondary spunlace reinforcement process, and the spunlace pressure is 8Mpa.

The spunlace nonwoven fabrics prepared in Examples 1-3 and Comparative Examples 1-4 had a grammage of 50 g/m ² .

Test example

In order to verify the technical effect of the present invention, the spunlace non-woven fabrics prepared in Examples 1-3 and Comparative Examples 1-4 were used for performance evaluation;

1. Antibacterial and antibacterial properties: According to the test method specified in GB/T 20944.3-2008 Evaluation of Antibacterial Properties of Textiles, Staphylococcus aureus, Escherichia coli and Candida albicans were selected as the test strains, and each group of spunlace nonwovens was tested. The bacteriostatic rate of , the test results are shown in Table 1;

2. Mechanical properties: According to the provisions of "FZ/T 60005-91 Determination of Breaking Strength and Elongation at Break of Nonwovens", take the spunlace non-woven fabrics prepared in Examples 1-3 and Comparative Examples 1-4, and cut them. It is a standard size; the breaking strength and elongation at break of the spunlace non-woven fabric are tested, and the test results are as follows;

Table 1

It can be seen from the data in Table 1 that the nonwoven fabrics prepared in Examples 1-3 have good tensile strength and elongation at break, and the spunlace nonwovens have good strength and toughness. In Comparative Example 1, cellulose acetate was not subjected to carboxylation treatment, and the polydopamine solution was directly impregnated, the intermolecular bonding force between cellulose and polydopamine was reduced, and the strength and toughness of the obtained spunlace non-woven fabric were lower than those in Example 2. In the invention, the use of polydopamine and succinic anhydride to treat the acetate fiber can improve the mechanical properties defects such as low strength of the acetate fiber. In Comparative Example 4, acetate fibers, polyethylene fibers, and polylactic acid fibers are mixed and laid, and the strength of the final spunlace non-woven fabric is lower than that in Example 2, so it is explained that the four-layer structure in this prescription can obtain better mechanics. performance.

The spunlace non-woven fabric prepared in Example 1-3 has good antibacterial performance, and the removal rate for Staphylococcus aureus, Escherichia coli, and Candida albicans can reach more than 97%; in Comparative Example 2, when the polylactic acid fiber is loaded with lysozyme , without swelling treatment, resulting in a small amount of lysozyme loaded in the polylactic acid fiber, resulting in a decrease in the bacteriostatic rate. In Comparative Example 3, the non-woven fabric was reinforced by the thermal spray melting process. Due to the high process temperature, the lysozyme loaded in the polylactic acid fiber was inactivated due to high temperature, resulting in a sharp drop in the bacteriostatic rate of the spunlace non-woven fabric. The positive effect of lysozyme on the bacteriostatic rate.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (3)

1. a preparation method of the spunlace nonwoven fabric of moisture absorption and bacteriostasis, is characterized in that: comprise the following steps; (1) Preparation of cellulose acetate: dissolve cellulose acetate in acetone solvent, raise the temperature to 67°C, stir evenly, cool down to 30°C, add anhydrous ethanol solution, let stand to form a precipitate, remove the upper layer solution by suction filtration, and obtain pretreated cellulose acetate; Dissolve the pretreated cellulose acetate in the acetone solution, add succinic anhydride and triethylamine, stir, raise the temperature to 67°C, react for 22h, cool down to 30°C, add anhydrous ethanol solution, let stand to form a precipitate, and filter with suction Remove impurities and dry to obtain carboxylated cellulose acetate; Dissolve carboxylated cellulose acetate in dimethylformamide solvent, add polydopamine solution, stir evenly, add concentrated sulfuric acid solution dropwise at 75°C, react for 25 minutes, filter, wash with deionized water, and spin to obtain acetate fiber; (2) Polylactic acid fiber pretreatment: immerse the polylactic acid fiber in 5mol/L sodium hydroxide solution, heat it in water, control the temperature to 75°C, and swell for 35min; filter to remove the sodium hydroxide solution, rinse with deionized water, and cool down to 22° C., add lysozyme buffer to the swollen polylactic acid fibers, and let stand for 50 min to obtain lysozyme-loaded polylactic acid fibers for use; The lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 7.3; the lysozyme and The volume ratio of 4-hydroxyethylpiperazine ethanesulfonic acid buffer solution is 2:1; (3) Preparation of finished spunlace non-woven fabric: in a dust-free environment, take the acetate fibers obtained in step (1), the polylactic acid fibers and polyethylene fibers treated in step (2) and soak them in antioxidants and flame retardants In the solution, filtered, dried, combed into single fibers, laid four layers of fiber webs in the order of polyethylene fiber-acetate fiber-polylactic acid fiber-polyethylene fiber, carded horizontally, and drafted and leveled the fiber web. Spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying, and winding to obtain a spunlace non-woven product that absorbs moisture and inhibits bacteria; The process conditions of the spunlace in step (3) are as follows: 4 spunlace heads are used in the spunlace reinforcement process, and the spunlace pressure is 40Mpa; in the secondary spunlace reinforcement process, 3 spunlace heads are used, and the spunlace pressure is 8Mpa. 2. the preparation method of the spunlace nonwoven fabric of moisture absorption and bacteriostasis according to claim 1, is characterized in that: by weight, 27 parts of acetate fibers, 27 parts of polylactic acid fibers, 55 parts of polyethylene fibers, antioxidant 2 parts, 1 part of flame retardant. 3. The preparation method of the spunlace non-woven fabric of moisture absorption and bacteriostasis according to claim 1, is characterized in that: antioxidant is phosphite, and flame retardant is melamine urethane.