CN114318671B - Preparation method of moisture-absorbing and antibacterial spunlaced non-woven fabric - Google Patents
Preparation method of moisture-absorbing and antibacterial spunlaced non-woven fabric Download PDFInfo
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- CN114318671B CN114318671B CN202111661135.9A CN202111661135A CN114318671B CN 114318671 B CN114318671 B CN 114318671B CN 202111661135 A CN202111661135 A CN 202111661135A CN 114318671 B CN114318671 B CN 114318671B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
- D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
- D06M16/003—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic with enzymes or microorganisms
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
Abstract
The invention discloses a preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric. The spunlaced non-woven fabric comprises the following raw materials, 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 reacting cellulose acetate, succinic anhydride and polydopamine; and after the polylactic acid fiber is swelled, loading lysozyme. The preparation method comprises the steps of firstly carrying out dipping treatment on polyethylene fibers, acetate fibers and polylactic acid fibers by using antioxidant and flame retardant solution, 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 water jet reinforcement to obtain the water jet non-woven fabric. The spun-laced non-woven fabric prepared by the method has the comprehensive performance, good antibacterial property, hygroscopicity, strength and toughness, and is particularly suitable for clothing fabrics.
Description
Technical Field
The invention relates to the technical field of processing of spunlaced non-woven fabrics, in particular to a preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric.
Background
The spun-laced non-woven fabric is formed by spraying high-pressure micro water flow onto one or more layers of fiber nets consisting of any one or more of silk, bamboo fiber, wood pulp fiber, alginate fiber, terylene, chinlon, polypropylene fiber, viscose fiber, chitin fiber, superfine fiber, tencel and glass fiber, so that the fibers are mutually entangled together, the fiber nets are reinforced by external force, and the obtained fabric has certain mechanical strength, namely the spun-laced non-woven fabric. The principle of the hydroentangled fiber web is similar to that of the needling process, except that the hydroentangled nonwoven fabric does not need needling needles, but the fiber web is sprayed by adopting a plurality of fine water jet-hydroentangler produced by high pressure. After the water jet passes through the fiber net, the fiber net is supported to rebound by the net curtain and is penetrated again, so that the fibers in the fiber net are displaced, penetrated, entangled and cohesive under the hydraulic action of high-speed water jet penetration in different directions, and the fiber net is reinforced.
Because the spun-laced non-woven fabric has the advantages of appearance which is more similar to the traditional textile than other non-woven materials, high strength, low fuzziness, high hygroscopicity, quick moisture absorption, good air permeability, soft hand feeling, good drapability, changeable appearance patterns, no need of adhesive reinforcement, washability and the like, the spun-laced non-woven fabric is popular in various industries since the spun-laced non-woven fabric is marketed. The coating is widely applied to medical curtains, surgical gowns, medical bandaging materials, wound dressings, medical gauze, aviation rags, clothing lining base cloths, coating base cloths, disposable materials, instrument and instrument high-grade rags, electronic industry high-grade rags, towels, cosmetic cottons, wet rags, mask coating materials and the like. At present, along with the quality requirement and functional requirement of people on the clothing fabric, the multifunctional fabric with excellent comprehensive performance is also gradually becoming a development trend.
Disclosure of Invention
The invention aims to provide a moisture-absorbing and antibacterial spunlaced non-woven fabric and a preparation method thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the moisture-absorbing and bacteria-inhibiting spunlaced nonwoven fabric is made up by using four layers of fibre web formed from polyethylene fibre, acetate fibre, polylactic acid fibre and polyethylene fibre through the processes of double spunlacing and reinforcing treatment.
Further, before the polyethylene fiber, the acetate fiber and the polylactic acid fiber are reinforced by water needling, the polyethylene fiber, the acetate fiber and the polylactic acid fiber are subjected to dipping treatment by an antioxidant and a flame retardant solution.
Further, the raw materials comprise, 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.
Further, the acetate fiber is mainly prepared by reacting cellulose acetate, succinic anhydride and polydopamine.
Further, the antioxidant is any one or more of pentaerythritol ester, phosphite ester and thiodipropionate antioxidant; the flame retardant is any one or more of melamine, melamine cyanurate and melamine phosphate.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) Preparing acetate fibers:
(2) Pretreatment of polylactic acid fibers:
(3) Preparing a finished product of the spunlaced non-woven fabric.
Further, a preparation method of the moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) Preparing cellulose acetate, namely dissolving cellulose acetate in an acetone solvent, adding an absolute ethyl alcohol solution, standing to form a precipitate, and filtering to remove an upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated acetate fibers in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 65-70 ℃, reacting, adding an absolute ethanol solution, standing to form a precipitate, filtering to remove impurities, and drying to obtain carboxylated acetate fibers;
dissolving carboxylated cellulose acetate in dimethylformamide solvent, adding polydopamine solution, stirring uniformly, dropwise adding concentrated sulfuric acid solution, reacting, filtering, washing with deionized water, and spinning to obtain acetate fiber;
(2) Pretreatment of polylactic acid fibers: immersing polylactic acid fibers in sodium hydroxide solution, heating in a water-soluble manner, and swelling; filtering to remove sodium hydroxide solution, rinsing with deionized water, adding lysozyme buffer solution into the swelled polylactic acid fiber, and standing to obtain the polylactic acid fiber loaded with lysozyme for later use;
(3) Preparing a water-jet non-woven fabric finished product: in a dust-free environment, immersing the acetate fiber prepared in the step (1), the polylactic acid fiber treated in the step (2) and the polyethylene fiber into an antioxidant and flame retardant solution, filtering, drying, carding into a single fiber shape, paving four layers of fiber nets according to the sequence of the polyethylene fiber, the acetate fiber, the polylactic acid fiber and the polyethylene fiber, transversely carding, drafting and leveling the fiber nets, and carrying out spunlaced reinforcement, stretching, secondary spunlaced reinforcement, natural drying and winding to prepare a moisture-absorption antibacterial spunlaced non-woven fabric finished product.
Further, a preparation method of the moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) Dissolving cellulose acetate in acetone solvent, heating to 65-70deg.C, stirring, cooling to 27-32deg.C, adding anhydrous ethanol solution, standing to form precipitate, and vacuum filtering to remove upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated acetate fibers in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 65-70 ℃, reacting for 20-24 hours, cooling to 27-32 ℃, adding an absolute ethanol solution, standing to form a precipitate, filtering to remove impurities, and drying to obtain carboxylated cellulose acetate;
dissolving carboxylated cellulose acetate in dimethylformamide solvent, adding polydopamine solution, stirring uniformly, dripping concentrated sulfuric acid solution at 70-80deg.C, reacting for 20-30min, filtering, washing with deionized water, and spinning to obtain acetate fiber;
(2) Pretreatment of polylactic acid fibers: immersing polylactic acid fibers in 5mol/L sodium hydroxide solution, heating in water, controlling the temperature to be 70-80 ℃, and swelling for 30-40min; filtering to remove sodium hydroxide solution, rinsing with deionized water, cooling to 20-25deg.C, adding lysozyme buffer solution into the swollen polylactic acid fiber, standing for 40-60min to obtain lysozyme-loaded polylactic acid fiber;
(3) Preparing a water-jet non-woven fabric finished product: in a dust-free environment, immersing the acetate fiber prepared in the step (1), the polylactic acid fiber treated in the step (2) and the polyethylene fiber into an antioxidant and flame retardant solution, filtering, drying, carding into a single fiber shape, paving four layers of fiber nets according to the sequence of the polyethylene fiber, the acetate fiber, the polylactic acid fiber and the polyethylene fiber, transversely carding, drafting and leveling the fiber nets, and carrying out spunlaced reinforcement, stretching, secondary spunlaced reinforcement, natural drying and winding to prepare a moisture-absorption antibacterial spunlaced non-woven fabric finished product.
Further, the lysozyme buffer solution in the step (2) is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 7.0-7.5; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 2:1.
Further, the process conditions of the water thorn in the step (3) are as follows: the water jet reinforcement process adopts 3-5 water jet heads, the water jet pressure is 30-45Mpa, the secondary water jet reinforcement process adopts 2-3 water jet heads, and the water jet pressure is 5-15Mpa.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts main polyethylene fiber, acetate fiber and polylactic acid fiber, and the water-jet nonwoven fabric with a four-layer structure of polyethylene fiber layer-acetate fiber layer-polylactic acid fiber layer-polyethylene fiber layer is prepared by double water jet reinforcement. Compared with natural fibers such as cotton, hemp and the like, the acetate fiber has good moisture absorption, air permeability and rebound resilience, does not generate static electricity and hair bulb, is comfortable to paste, and is suitable for manufacturing clothes. However, the strength of the acetate fiber is low, and the acetate fiber is easy to break and has poor wear resistance when being pulled by force; in order to solve the problem, the carboxylation treatment is carried out on the cellulose acetate, the carboxylated cellulose acetate can form a bridging structure with active hydroxyl on the surface of polydopamine, the interfacial binding force with the cellulose acetate is stronger, the molecular area is increased, and the toughness and the wear resistance are improved; in the conventional technology, polydopamine impregnated fibers or dopamine hydrochloride is polymerized on the fibers to coat polydopamine on the fiber membranes, but in the two modes, the polydopamine and the fiber membranes have weak binding force and are easy to fall off; because the polydopamine molecule contains a plurality of benzene rings with rigid structures, the structure of the polydopamine molecule is introduced to the fiber molecule, so that the mechanical strength of the acetate fiber can be improved.
The spun-laced non-woven fabric prepared by the invention comprises four layers, namely a polyethylene fiber layer, an acetate fiber layer, a polylactic acid fiber layer and a polyethylene fiber layer in sequence, and the polyethylene fiber has the advantages of high thermal stability, high mechanical strength and high toughness, and is used as the outermost layer to play a role in protecting the middle acetate fiber layer and the polylactic acid fiber layer.
Polylactic acid is a widely applied biodegradable polymer material, and can be gradually degraded into water and carbon dioxide in nature, so that the polylactic acid has no pollution to the environment. In addition, polylactic acid can be used as a carrier for fixing biological enzyme, and has good biocompatibility. The lysozyme can efficiently hydrolyze peptidoglycan which is a main component of the cell wall of bacteria, and after the cell wall is broken, bacteria cannot perform normal growth activities, so that the bacteria gradually progress to death, and the antibacterial and bactericidal effects are achieved; because the enzyme has strict requirements on living environment, the change of temperature, metal ions and pH value can directly influence the activity of the enzyme. In the invention, lysozyme is loaded in the polylactic acid fiber, and sodium hydroxide solution is used for swelling the polylactic acid fiber before loading, so that the porosity, specific surface area and permeability of the polylactic acid fiber are improved, and the loading amount of lysozyme in the polylactic acid fiber is increased. The polylactic acid fiber can play a role of solidifying lysozyme, reduce the damage of the lysozyme by other external factors, and achieve the effects of lasting and efficient bacteriostasis and sterilization. In addition, in the process of preparing the non-woven fabric, a water jet technology is adopted, and compared with a melt-blowing and hot-attaching technology, the temperature of the water jet technology is lower than 35 ℃, so that the risk of high-temperature inactivation of lysozyme is avoided.
The spun-laced non-woven fabric prepared by the method has the comprehensive performance, good antibacterial property, hygroscopicity, strength and toughness, and is particularly suitable for clothing fabrics.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The spun-laced non-woven fabric is prepared by double spun-laced reinforcement of composite fibers; the composite fiber comprises the following raw materials in parts by weight, 25 parts of acetate fiber, 25 parts of polylactic acid fiber, 50 parts of polyethylene fiber, 1 part of antioxidant and 1 part of flame retardant.
The antioxidant is pentaerythritol ester, and the flame retardant is melamine.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) Dissolving cellulose acetate in acetone solvent, heating to 65deg.C, stirring, cooling to 27deg.C, adding anhydrous ethanol solution, standing to form precipitate, and vacuum filtering to remove upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated acetate fibers in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 65 ℃, reacting for 20 hours, cooling to 27 ℃, adding an absolute ethanol solution, standing to form a precipitate, filtering to remove impurities, and drying to obtain carboxylated acetate fibers;
dissolving carboxylated cellulose acetate in dimethylformamide solvent, adding polydopamine solution, stirring uniformly, dropwise adding concentrated sulfuric acid solution, reacting at 70 ℃ for 20min, filtering, washing with deionized water, and spinning to obtain acetate fiber;
(2) Pretreatment of polylactic acid fibers: immersing polylactic acid fibers in 5mol/L sodium hydroxide solution, heating in water, controlling the temperature to 70 ℃, and swelling for 30min; filtering to remove sodium hydroxide solution, rinsing with deionized water, cooling to 20deg.C, adding lysozyme buffer solution into the swelled polylactic acid fiber, standing for 40min to obtain lysozyme-loaded polylactic acid fiber;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 7.0; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 2:1;
(3) Preparing a water-jet non-woven fabric finished product: in a dust-free environment, immersing the acetate fiber prepared in the step (1), the polylactic acid fiber treated in the step (2) and the polyethylene fiber into an antioxidant and flame retardant solution, filtering, drying, carding into a single fiber shape, paving four layers of fiber nets according to the sequence of the polyethylene fiber, the acetate fiber, the polylactic acid fiber and the polyethylene fiber, transversely carding, drafting and leveling the fiber nets, and carrying out spunlaced reinforcement, stretching, secondary spunlaced reinforcement, natural drying and winding to prepare a moisture-absorption antibacterial spunlaced non-woven fabric finished product.
The technological conditions of the hydro-entanglements are as follows: the water jet reinforcement process adopts 3 water jet heads, the water jet pressure is 30Mpa, the secondary water jet reinforcement process adopts 2 water jet heads, and the water jet pressure is 5Mpa.
Example 2
The spun-laced non-woven fabric is prepared by double spun-laced reinforcement of composite fibers; the composite fiber comprises the following raw materials in parts by weight, 27 parts of acetate fiber, 27 parts of polylactic acid fiber, 55 parts of polyethylene fiber, 2 parts of antioxidant and 1 part of flame retardant.
The antioxidant is phosphite ester, and the flame retardant is melamine cyanurate.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) Dissolving cellulose acetate in acetone solvent, heating to 67 deg.C, stirring, cooling to 30 deg.C, adding absolute ethanol solution, standing to form precipitate, and suction filtering to remove upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated acetate fibers in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 67 ℃, reacting for 22 hours, cooling to 30 ℃, adding an absolute ethanol solution, standing to form a precipitate, filtering to remove impurities, and drying to obtain carboxylated acetate fibers;
dissolving carboxylated cellulose acetate in dimethylformamide solvent, adding polydopamine solution, stirring uniformly, dropwise adding concentrated sulfuric acid solution, reacting at 75 ℃ for 25min, filtering, washing with deionized water, and spinning to obtain acetate fiber;
(2) Pretreatment of polylactic acid fibers: immersing polylactic acid fibers in 5mol/L sodium hydroxide solution, heating in water, controlling the temperature at 75 ℃, and swelling for 35min; filtering to remove sodium hydroxide solution, rinsing with deionized water, cooling to 22 ℃, adding lysozyme buffer solution into the swollen polylactic acid fiber, and standing for 50min to obtain the polylactic acid fiber loaded with lysozyme for later use;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 7.3; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 2:1;
(3) Preparing a water-jet non-woven fabric finished product: in a dust-free environment, immersing the acetate fiber prepared in the step (1), the polylactic acid fiber treated in the step (2) and the polyethylene fiber into an antioxidant and flame retardant solution, filtering, drying, carding into a single fiber shape, paving four layers of fiber nets according to the sequence of the polyethylene fiber, the acetate fiber, the polylactic acid fiber and the polyethylene fiber, transversely carding, drafting and leveling the fiber nets, and carrying out spunlaced reinforcement, stretching, secondary spunlaced reinforcement, natural drying and winding to prepare a moisture-absorption antibacterial spunlaced non-woven fabric finished product.
The technological conditions of the hydro-entanglements are as follows: the hydro-entangled reinforcement process adopts 4 hydro-entangled heads, the hydro-entangled pressure is 40Mpa, the secondary hydro-entangled reinforcement process adopts 3 hydro-entangled heads, and the hydro-entangled pressure is 8Mpa.
Example 3
The spun-laced non-woven fabric is prepared by double spun-laced reinforcement of composite fibers; the composite fiber comprises the following raw materials in parts by weight, 30 parts of acetate fiber, 30 parts of polylactic acid fiber, 60 parts of polyethylene fiber, 3 parts of antioxidant and 3 parts of flame retardant.
The antioxidant is phosphite ester and the flame retardant is melamine.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) Dissolving cellulose acetate in acetone solvent, heating to 70deg.C, stirring, cooling to 32deg.C, adding anhydrous ethanol solution, standing to form precipitate, and vacuum filtering to remove upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated acetate fibers in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 70 ℃, reacting for 24 hours, cooling to 32 ℃, adding an absolute ethanol solution, standing to form a precipitate, filtering to remove impurities, and drying to obtain carboxylated acetate fibers;
dissolving carboxylated cellulose acetate in dimethylformamide solvent, adding polydopamine solution, stirring uniformly, dropwise adding concentrated sulfuric acid solution, reacting for 30min at 80 ℃, filtering, washing with deionized water, and spinning to obtain acetate fiber;
(2) Pretreatment of polylactic acid fibers: immersing polylactic acid fibers in 5mol/L sodium hydroxide solution, heating in water, controlling the temperature to 80 ℃, and swelling for 40min; filtering to remove sodium hydroxide solution, rinsing with deionized water, cooling to 25deg.C, adding lysozyme buffer solution into the swelled polylactic acid fiber, and standing for 60min to obtain lysozyme-loaded polylactic acid fiber;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 7.5; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 2:1;
(3) Preparing a water-jet non-woven fabric finished product: in a dust-free environment, immersing the acetate fiber prepared in the step (1), the polylactic acid fiber treated in the step (2) and the polyethylene fiber into an antioxidant and flame retardant solution, filtering, drying, carding into a single fiber shape, paving four layers of fiber nets according to the sequence of the polyethylene fiber, the acetate fiber, the polylactic acid fiber and the polyethylene fiber, transversely carding, drafting and leveling the fiber nets, and carrying out spunlaced reinforcement, stretching, secondary spunlaced reinforcement, natural drying and winding to prepare a moisture-absorption antibacterial spunlaced non-woven fabric finished product.
The technological conditions of the hydro-entanglements are as follows: the hydro-entangled reinforcement process adopts 5 hydro-entangled heads, the hydro-entangled pressure is 45Mpa, the secondary hydro-entangled reinforcement process adopts 3 hydro-entangled heads, and the hydro-entangled pressure is 15Mpa.
Comparative example 1
The spun-laced non-woven fabric is prepared by double spun-laced reinforcement of composite fibers; the composite fiber comprises the following raw materials in parts by weight, 27 parts of acetate fiber, 27 parts of polylactic acid fiber, 55 parts of polyethylene fiber, 2 parts of antioxidant and 1 part of flame retardant.
The antioxidant is phosphite ester, and the flame retardant is melamine cyanurate.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) Dissolving cellulose acetate in an acetone solvent, raising the temperature to 67 ℃, uniformly stirring, cooling to 30 ℃, adding an absolute ethanol solution, standing to form a precipitate, filtering to remove an upper layer solution to obtain pretreated cellulose acetate, adding the cellulose acetate into a polydopamine solution, oscillating, removing an unreacted polydopamine solution, and spinning to obtain the cellulose acetate;
the remaining steps were the same as in example 2.
Comparative example 2
The spun-laced non-woven fabric is prepared by double spun-laced reinforcement of composite fibers; the composite fiber comprises the following raw materials in parts by weight, 27 parts of acetate fiber, 27 parts of polylactic acid fiber, 55 parts of polyethylene fiber, 2 parts of antioxidant and 1 part of flame retardant.
The antioxidant is phosphite ester, and the flame retardant is melamine cyanurate.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
(1) The same as in example 2
(2) Pretreatment of polylactic acid fibers: adding lysozyme buffer solution into the polylactic acid fiber, and standing for 50min to obtain the lysozyme-loaded polylactic acid fiber for later use;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 7.3; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 2:1;
(3) The same as in example 2
Comparative example 3
The spun-laced non-woven fabric is prepared by double spun-laced reinforcement of composite fibers; the composite fiber comprises the following raw materials in parts by weight, 27 parts of acetate fiber, 27 parts of polylactic acid fiber, 55 parts of polyethylene fiber, 2 parts of antioxidant and 1 part of flame retardant.
The antioxidant is phosphite ester, and the flame retardant is melamine cyanurate.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
the hot melt blowing process was used instead of the hydroentangling process, the remainder being the same as in example 2.
Comparative example 4
The spun-laced non-woven fabric is prepared by double spun-laced reinforcement of composite fibers; the composite fiber comprises the following raw materials in parts by weight, 27 parts of acetate fiber, 27 parts of polylactic acid fiber, 55 parts of polyethylene fiber, 2 parts of antioxidant and 1 part of flame retardant.
The antioxidant is phosphite ester, and the flame retardant is melamine cyanurate.
A preparation method of a moisture-absorbing and antibacterial spunlaced non-woven fabric comprises the following steps of;
step (1) and step (2) are the same as in example 2;
(3) Preparing a water-jet non-woven fabric finished product: in a dust-free environment, immersing the acetate fiber prepared in the step (1), the polylactic acid fiber treated in the step (2) and the polyethylene fiber into an antioxidant and flame retardant solution, filtering, drying, carding into single fiber, mixing, laying a fiber net, transversely carding, drafting and leveling the fiber net, reinforcing by water jet, stretching, reinforcing by secondary water jet, naturally drying, and winding to prepare a water jet non-woven fabric finished product with moisture absorption and bacteriostasis.
The technological conditions of the hydro-entanglements are as follows: the hydro-entangled reinforcement process adopts 4 hydro-entangled heads, the hydro-entangled pressure is 40Mpa, the secondary hydro-entangled reinforcement process adopts 3 hydro-entangled heads, and the hydro-entangled pressure is 8Mpa.
The spunlaced nonwoven fabrics prepared in examples 1-3 and comparative examples 1-4 had a grammage of 50g/m 2 。
Test examples
In order to verify the technical effects of the invention, the spun-laced non-woven fabrics prepared in examples 1-3 and comparative examples 1-4 were taken for performance evaluation;
1. antibacterial properties: according to the test method specified in GB/T20944.3-2008 evaluation of antibacterial properties of textiles, staphylococcus aureus, escherichia coli and candida albicans are selected as test strains, the antibacterial rate of each group of spunlaced nonwoven is detected, and the detection results are shown in Table 1;
2. mechanical properties: according to the regulation of FZ/T60005-91 nonwoven fabric breaking strength and elongation at break measurement, the spunlaced nonwoven fabrics prepared in examples 1-3 and comparative examples 1-4 are cut into standard sizes; the breaking strength and the breaking elongation of the spun-laced non-woven fabric are detected, and the test results are as follows;
TABLE 1
As is clear from the data in Table 1, the nonwoven fabrics prepared in examples 1 to 3 were excellent in tensile strength and elongation at break, and the spunlaced nonwoven was excellent in strength and toughness. In comparative example 1, cellulose acetate is not carboxylated, the polydopamine solution is directly immersed, the intermolecular binding force between cellulose and polydopamine is reduced, and the strength and toughness of the obtained spun-laced non-woven fabric are lower than those of example 2, so that the strength and toughness of the cellulose acetate are low and other mechanical performance defects of the cellulose acetate can be overcome by treating the cellulose acetate with polydopamine and succinic anhydride. In comparative example 4, acetate fibers, polyethylene fibers and polylactic acid fibers are mixed and paved, and the strength of the finally prepared spunlaced non-woven fabric is lower than that of example 2, so that the four-layer structure in the invention can obtain better mechanical properties.
The spunlaced non-woven fabrics prepared in the examples 1-3 have good antibacterial performance, and the removal rate of staphylococcus aureus, escherichia coli and candida albicans can reach more than 97 percent; when the polylactic acid fiber in comparative example 2 is loaded with lysozyme, the swelling treatment is not performed, so that the amount of the lysozyme loaded in the polylactic acid fiber is small, and the antibacterial rate is reduced. In the comparative example 3, the nonwoven fabric is reinforced by adopting the hot-spraying and melting process, and the lysozyme loaded in the polylactic acid fiber is deactivated due to high temperature, so that the bacteriostasis rate of the spunlaced nonwoven fabric is suddenly reduced, and the positive effect of the lysozyme on the bacteriostasis rate is also illustrated.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A preparation method of a moisture-absorbing and bacteriostatic spunlaced non-woven fabric is characterized by comprising the following steps: comprises the following steps of;
(1) Dissolving cellulose acetate in acetone solvent, heating to 67 deg.C, stirring, cooling to 30 deg.C, adding absolute ethanol solution, standing to form precipitate, and suction filtering to remove upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated acetate fibers in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 67 ℃, reacting for 22 hours, cooling to 30 ℃, adding an absolute ethanol solution, standing to form a precipitate, filtering to remove impurities, and drying to obtain carboxylated acetate fibers;
dissolving carboxylated cellulose acetate in dimethylformamide solvent, adding polydopamine solution, stirring uniformly, dropwise adding concentrated sulfuric acid solution, reacting at 75 ℃ for 25min, filtering, washing with deionized water, and spinning to obtain acetate fiber;
(2) Pretreatment of polylactic acid fibers: immersing polylactic acid fibers in 5mol/L sodium hydroxide solution, heating in water, controlling the temperature at 75 ℃, and swelling for 35min; filtering to remove sodium hydroxide solution, rinsing with deionized water, cooling to 22 ℃, adding lysozyme buffer solution into the swollen polylactic acid fiber, and standing for 50min to obtain the polylactic acid fiber loaded with lysozyme for later use;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 7.3; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethane sulfonic acid buffer solution is 2:1;
(3) Preparing a water-jet non-woven fabric finished product: in a dust-free environment, immersing the acetate fiber prepared in the step (1), the polylactic acid fiber treated in the step (2) and the polyethylene fiber into an antioxidant and flame retardant solution, filtering, drying, carding into a single fiber shape, paving four layers of fiber nets according to the sequence of the polyethylene fiber, the acetate fiber, the polylactic acid fiber and the polyethylene fiber, transversely carding, drafting and leveling the fiber nets, and carrying out spunlaced reinforcement, stretching, secondary spunlaced reinforcement, natural drying and winding to prepare a moisture-absorption antibacterial spunlaced non-woven fabric finished product;
the technological conditions of the water thorn in the step (3) are as follows: the water jet reinforcement process adopts 4 water jet heads, the water jet pressure is 40Mpa, the secondary water jet reinforcement process adopts 3 water jet heads, and the water jet pressure is 8Mpa;
27 parts of acetate fiber, 27 parts of polylactic acid fiber, 55 parts of polyethylene fiber, 2 parts of antioxidant and 1 part of flame retardant;
the antioxidant is phosphite ester, and the flame retardant is melamine cyanurate.
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| JP7252684B1 (en) | 2022-09-12 | 2023-04-05 | 竹本油脂株式会社 | Processing agent for viscose rayon, viscose rayon, viscose rayon staple fiber, and method for producing spunlace nonwoven fabric |
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| US6946506B2 (en) * | 2001-05-10 | 2005-09-20 | The Procter & Gamble Company | Fibers comprising starch and biodegradable polymers |
| AU2003900180A0 (en) * | 2003-01-16 | 2003-01-30 | Silverbrook Research Pty Ltd | Method and apparatus (dam001) |
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| US9834516B2 (en) * | 2007-02-14 | 2017-12-05 | Eastman Chemical Company | Regioselectively substituted cellulose esters produced in a carboxylated ionic liquid process and products produced therefrom |
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