CN113005634A - Moisture-absorbing and bacteriostatic spunlace non-woven fabric and preparation method thereof - Google Patents
Moisture-absorbing and bacteriostatic spunlace non-woven fabric and preparation method thereof Download PDFInfo
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- CN113005634A CN113005634A CN202110208870.8A CN202110208870A CN113005634A CN 113005634 A CN113005634 A CN 113005634A CN 202110208870 A CN202110208870 A CN 202110208870A CN 113005634 A CN113005634 A CN 113005634A
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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 moisture-absorbing and bacteriostatic spunlace non-woven fabric and a preparation method thereof. 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
Technical Field
The invention relates to the technical field of spunlace non-woven fabric processing, in particular to a moisture-absorbing and bacteriostatic spunlace non-woven fabric and a preparation method thereof.
Background
The spunlace 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, polyester, nylon, polypropylene fiber, viscose fiber, chitin fiber, superfine fiber, tencel and glass fiber to enable the fibers to be mutually entangled, the fiber nets are reinforced by external force to have certain mechanical strength, and finally the obtained fabric is the spunlace non-woven fabric. The principle of hydroentanglement is similar to that of the needle-punching process, except that the hydroentangled nonwoven does not require needles, but rather the web is jetted using a high-pressure-generated multi-strand fine water jet-hydroentangling machine. After the water jet penetrates through the fiber net, the supported net curtain rebounds, and the fiber net is inserted again, so that the fibers in the fiber net are displaced, inserted, tangled and cohered under the hydraulic action of the high-speed water jet inserted in different directions, and the fiber net is reinforced.
The spunlace nonwoven fabric has the advantages of appearance closer to that of the traditional textile compared with other nonwoven materials, high strength, low fuzz, high hygroscopicity, rapid moisture absorption, good air permeability, soft hand feeling, good drapability, various appearance patterns, no need of adhesive reinforcement, washing resistance and the like, and is deeply popular in various industries since the market is released. The medical dressing is widely applied to medical curtains, surgical gowns, surgical cover cloths, medical bandaging materials, wound dressings, medical gauze, aviation cleaning cloths, clothing lining base cloths, coating base cloths, disposable materials, instrument and meter high-grade cleaning cloths, electronic industry high-grade cleaning cloths, towels, cosmetic cottons, wet tissues, mask coating materials and the like. At the present stage, along with the increasingly high quality requirements and functional requirements of people on the fabric of clothes, the multifunctional fabric with excellent comprehensive performance gradually becomes a development trend.
Disclosure of Invention
The invention aims to provide a moisture-absorbing and bacteriostatic spunlace 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: a hydroscopic antibacterial spun-laced non-woven fabric is prepared from four layers of fibrous nets consisting of polyethylene fiber, acetate fiber, polylactic acid fiber and polyethylene fiber through dual-spunlacing reinforcement.
Further, the polyethylene fibers, the acetate fibers and the polylactic acid fibers are subjected to impregnation treatment by an antioxidant and a flame retardant solution before being subjected to spunlace reinforcement.
Furthermore, the weight parts of the raw materials are 25-30 parts of acetate fiber, 25-30 parts of polylactic acid fiber, 50-60 parts of polyethylene fiber, 1-3 parts of antioxidant and 1-3 parts of flame retardant.
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 bacteriostatic spunlace non-woven fabric comprises the following steps;
(1) preparing acetate fiber:
(4) pretreatment of polylactic acid fiber:
(5) preparing a finished product of the spunlace non-woven fabric.
Further, a preparation method of the moisture-absorbing and bacteriostatic spunlace non-woven fabric comprises the following steps;
(1) preparing cellulose acetate, namely dissolving cellulose acetate in an acetone solvent, adding an absolute ethanol solution, standing to form a precipitate, and filtering to remove an upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated cellulose acetate 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, performing suction filtration to remove impurities, and drying to obtain carboxylated cellulose acetate;
dissolving carboxyl cellulose acetate in a dimethylformamide solvent, adding a polydopamine solution, uniformly stirring, dropwise adding a concentrated sulfuric acid solution, reacting, filtering, washing with deionized water, and spinning to obtain acetate fibers;
(2) pretreatment of polylactic acid fiber: immersing polylactic acid fiber in a sodium hydroxide solution, dissolving in water, heating, and swelling; filtering to remove a sodium hydroxide solution, rinsing with deionized water, adding a lysozyme buffer solution into the swollen polylactic acid fiber, and standing to obtain lysozyme-loaded polylactic acid fiber for later use;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers treated in the step (2) and the polyethylene fibers into an antioxidant and flame retardant solution, filtering, drying and carding to form single fibers, paving four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, transversely carding, drafting and leveling the fiber nets, carrying out spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying and rolling to obtain a moisture-absorbing and bacteria-inhibiting spunlace finished product.
Further, a preparation method of the moisture-absorbing and bacteriostatic spunlace non-woven fabric comprises the following steps;
(1) preparing acetate fiber, dissolving cellulose acetate in acetone solvent, heating to 65-70 deg.C, stirring, cooling to 27-32 deg.C, adding anhydrous ethanol solution, standing to form precipitate, and vacuum filtering to remove upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated cellulose acetate in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 65-70 ℃, reacting for 20-24h, cooling to 27-32 ℃, adding an anhydrous ethanol solution, standing to form a precipitate, performing suction filtration to remove impurities, and drying to obtain carboxylated cellulose acetate;
dissolving carboxylated cellulose acetate in a dimethylformamide solvent, adding a polydopamine solution, uniformly stirring, dropwise adding a concentrated sulfuric acid solution, reacting at the temperature of 70-80 ℃ for 20-30min, filtering, washing with deionized water, and spinning to obtain cellulose acetate;
(2) pretreatment of polylactic acid fiber: immersing polylactic acid fiber in 5mol/L sodium hydroxide solution, dissolving in water, heating, controlling the temperature at 70-80 ℃, and swelling for 30-40 min; filtering to remove sodium hydroxide solution, rinsing with deionized water, cooling to 20-25 deg.C, adding lysozyme buffer solution into the swollen polylactic acid fiber, and standing for 40-60min to obtain lysozyme-loaded polylactic acid fiber;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers treated in the step (2) and the polyethylene fibers into an antioxidant and flame retardant solution, filtering, drying and carding to form single fibers, paving four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, transversely carding, drafting and leveling the fiber nets, carrying out spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying and rolling to obtain a moisture-absorbing and bacteria-inhibiting spunlace finished product.
Further, the lysozyme buffer solution in the step (2) is prepared by mixing lysozyme and a 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 7.0-7.5; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 2: 1.
Further, the process conditions of the water punching in the step (3) are as follows: the spunlace reinforcement process adopts 3-5 spunlace heads, the spunlace pressure is 30-45Mpa, and the secondary spunlace reinforcement process adopts 2-3 spunlace heads, and the spunlace pressure is 5-15 Mpa.
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 prepares the spunlace nonwoven fabric with four-layer structure of polyethylene fiber layer-acetate fiber layer-polylactic acid fiber layer-polyethylene fiber layer through double spunlace reinforcement. Compared with natural fibers such as cotton, hemp and the like, the cellulose acetate fiber has good moisture absorption and air permeability and rebound resilience, does not generate static electricity and hair bulbs, is comfortable to adhere to skin and is suitable for making clothes. But the acetate fiber has lower strength, is easy to break and has poorer wear resistance when being pulled by force; in order to improve the problem, the cellulose acetate is subjected to carboxylation treatment, the carboxylated cellulose acetate and active hydroxyl on the surface of polydopamine form a bridging structure, the bonding force of the interface of the carboxylated cellulose acetate and the cellulose acetate is stronger, the molecular area is increased, and the toughness and the wear resistance are also improved; in the conventional technology, the fiber is impregnated with polydopamine or the polydopamine hydrochloride is polymerized on the fiber to coat the polydopamine on the fiber membrane, but the polydopamine and the fiber membrane are weak in binding force and easy to fall off in the two ways; because polydopamine molecules contain a plurality of benzene rings with rigid structures, the structure of the polydopamine molecules is introduced onto fiber molecules, and the mechanical strength of acetate fibers can be improved.
The spunlace 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, has the advantages of strong thermal stability, high mechanical strength and high toughness of the polyethylene fiber, and has the function of protecting the middle acetate fiber layer and the polylactic acid fiber layer by taking the polyethylene fiber as the outermost layer.
Polylactic acid is a biodegradable high molecular material which is widely applied, can be gradually degraded into water and carbon dioxide in nature, and has no pollution to the environment. In addition, the polylactic acid can be used as a carrier for immobilizing the biological enzyme and has good biocompatibility. The lysozyme can efficiently hydrolyze peptidoglycan which is a main component of bacterial cell walls, and after the cell walls are broken, bacteria can not normally grow, so that the bacteria gradually disappear, and the functions of bacteriostasis and sterilization are achieved; because the requirement of the enzyme on the storage environment is strict, the activity of the enzyme can be directly influenced by the changes of temperature, metal ions and pH value. Therefore, in the invention, lysozyme is loaded in the polylactic acid fiber, and the sodium hydroxide solution is used for swelling the polylactic acid fiber before loading, so that the porosity, the specific surface area and the 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 in curing lysozyme, reduce the damage of lysozyme caused 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 spunlace process is adopted, compared with a melt-blown and thermal bonding process, the temperature of the spunlace process is lower than 35 ℃, and the risk of high-temperature inactivation of lysozyme is also avoided.
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.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fiber comprises the following raw materials, 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 bacteriostatic spunlace non-woven fabric comprises the following steps;
(1) preparing cellulose acetate, namely dissolving cellulose acetate in an acetone solvent, raising the temperature to 65 ℃, uniformly stirring, reducing the temperature to 27 ℃, adding an absolute ethanol solution, standing to form a precipitate, and removing an upper layer solution by suction filtration to obtain pretreated cellulose acetate;
dissolving pretreated cellulose acetate 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 cellulose acetate;
dissolving carboxyl cellulose acetate in a dimethylformamide solvent, adding a polydopamine solution, uniformly stirring, dropwise adding a concentrated sulfuric acid solution, reacting at the temperature of 70 ℃ for 20min, filtering, washing with deionized water, and spinning to obtain acetate fibers;
(2) pretreatment of polylactic acid fiber: immersing polylactic acid fiber in 5mol/L sodium hydroxide solution, dissolving in water, heating, controlling the temperature at 70 ℃, and swelling for 30 min; filtering to remove a sodium hydroxide solution, rinsing with deionized water, cooling to 20 ℃, adding a lysozyme buffer solution into the swollen polylactic acid fiber, and standing for 40min to obtain lysozyme-loaded polylactic acid fiber for later use;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 7.0; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 2: 1;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers treated in the step (2) and the polyethylene fibers into an antioxidant and flame retardant solution, filtering, drying and carding to form single fibers, paving four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, transversely carding, drafting and leveling the fiber nets, carrying out spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying and rolling to obtain a moisture-absorbing and bacteria-inhibiting spunlace finished product.
The process conditions of the spunlace are as follows: the spunlace reinforcement process adopts 3 spunlace heads, the spunlace pressure is 30Mpa, the secondary spunlace reinforcement process adopts 2 spunlace heads, and the spunlace pressure is 5 Mpa.
Example 2
The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fiber comprises the following raw materials, 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 bacteriostatic spunlace non-woven fabric comprises the following steps;
(1) preparing cellulose acetate, namely dissolving cellulose acetate in an acetone solvent, raising the temperature to 67 ℃, uniformly stirring, reducing the temperature to 30 ℃, adding an absolute ethanol solution, standing to form a precipitate, and removing an upper layer solution by suction filtration to obtain pretreated cellulose acetate;
dissolving pretreated cellulose acetate 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 cellulose acetate;
dissolving carboxyl cellulose acetate in a dimethylformamide solvent, adding a polydopamine solution, uniformly stirring, dropwise adding a concentrated sulfuric acid solution, reacting for 25min at the temperature of 75 ℃, filtering, washing with deionized water, and spinning to obtain acetate fibers;
(2) pretreatment of polylactic acid fiber: immersing polylactic acid fiber in 5mol/L sodium hydroxide solution, dissolving in water, heating, controlling the temperature at 75 ℃, and swelling for 35 min; filtering to remove a sodium hydroxide solution, rinsing with deionized water, cooling to 22 ℃, adding a lysozyme buffer solution into the swollen polylactic acid fiber, and standing for 50min to obtain lysozyme-loaded polylactic acid fiber for later use;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 7.3; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 2: 1;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers treated in the step (2) and the polyethylene fibers into an antioxidant and flame retardant solution, filtering, drying and carding to form single fibers, paving four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, transversely carding, drafting and leveling the fiber nets, carrying out spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying and rolling to obtain a moisture-absorbing and bacteria-inhibiting spunlace finished product.
The process conditions of the spunlace are as follows: 4 spunlace heads are adopted in the spunlace reinforcement process, the spunlace pressure is 40Mpa, and 3 spunlace heads are adopted in the secondary spunlace reinforcement process, and the spunlace pressure is 8 Mpa.
Example 3
The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fiber comprises the following raw materials, 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 bacteriostatic spunlace non-woven fabric comprises the following steps;
(1) preparing cellulose acetate, namely dissolving cellulose acetate in an acetone solvent, raising the temperature to 70 ℃, uniformly stirring, cooling to 32 ℃, adding an absolute ethanol solution, standing to form a precipitate, and removing an upper layer solution by suction filtration to obtain pretreated cellulose acetate;
dissolving pretreated cellulose acetate 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 cellulose acetate;
dissolving carboxyl cellulose acetate in a dimethylformamide solvent, adding a polydopamine solution, uniformly stirring, dropwise adding a concentrated sulfuric acid solution, reacting at the temperature of 80 ℃ for 30min, filtering, washing with deionized water, and spinning to obtain acetate fibers;
(2) pretreatment of polylactic acid fiber: immersing polylactic acid fiber in 5mol/L sodium hydroxide solution, dissolving in water, heating, controlling the temperature at 80 ℃, and swelling for 40 min; filtering to remove a sodium hydroxide solution, rinsing with deionized water, cooling to 25 ℃, adding a lysozyme buffer solution into the swollen polylactic acid fiber, and standing for 60min to obtain lysozyme-loaded polylactic acid fiber for later use;
the lysozyme buffer solution is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 7.5; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 2: 1;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers treated in the step (2) and the polyethylene fibers into an antioxidant and flame retardant solution, filtering, drying and carding to form single fibers, paving four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, transversely carding, drafting and leveling the fiber nets, carrying out spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying and rolling to obtain a moisture-absorbing and bacteria-inhibiting spunlace finished product.
The process conditions of the spunlace are as follows: the spunlace reinforcement process adopts 5 spunlace heads, the spunlace pressure is 45Mpa, the secondary spunlace reinforcement process adopts 3 spunlace heads, and the spunlace pressure is 15 Mpa.
Comparative example 1
The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fiber comprises the following raw materials, 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 bacteriostatic spunlace non-woven fabric comprises the following steps;
(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, removing an upper layer solution by suction filtration 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 spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fiber comprises the following raw materials, 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 bacteriostatic spunlace non-woven fabric comprises the following steps;
(1) same as in example 2
(2) Pretreatment of polylactic acid fiber: 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 ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 7.3; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 2: 1;
(3) same as in example 2
Comparative example 3
The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fiber comprises the following raw materials, 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 bacteriostatic spunlace non-woven fabric comprises the following steps;
the hot melt blowing process was used instead of the water jet process, and the rest was the same as in example 2.
Comparative example 4
The spunlace non-woven fabric is prepared by double spunlace reinforcement of composite fibers; the composite fiber comprises the following raw materials, 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 bacteriostatic spunlace non-woven fabric comprises the following steps;
step (1) and step (2) are the same as in example 2;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers and the polyethylene fibers treated in the step (2) into an antioxidant and flame retardant solution, filtering, drying, carding into single fibers, mixing and laying a fiber web, transversely carding, drafting and leveling the fiber web, spunlacing and reinforcing, stretching, spunlacing and reinforcing for the second time, naturally drying, and rolling to obtain the finished moisture-absorbing and bacteriostatic spunlaced non-woven fabric.
The process conditions of the spunlace are as follows: 4 spunlace heads are adopted in the spunlace reinforcement process, the spunlace pressure is 40Mpa, and 3 spunlace heads are adopted in the secondary spunlace reinforcement process, and the spunlace pressure is 8 Mpa.
The gram weights of the spunlace nonwoven fabrics prepared in examples 1 to 3 and comparative examples 1 to 4 were 50g/m2。
Test examples
In order to verify the technical effect of the invention, the spunlace nonwoven fabrics prepared in the examples 1-3 and the comparative examples 1-4 are taken for performance evaluation;
1. bacteriostasis and bacterinertness: according to a test method specified in GB/T20944.3-2008 evaluation of antibacterial performance of textiles, staphylococcus aureus, escherichia coli and candida albicans are selected as test strains, the bacteriostasis rate of each group of spunlace nonwoven fabrics is detected, and the detection result is shown in table 1;
2. mechanical properties: the spunlace nonwoven fabrics prepared in examples 1-3 and comparative examples 1-4 are cut into standard sizes according to the regulations of FZ/T60005-91 determination of breaking strength and breaking elongation of nonwoven fabrics; detecting the breaking strength and the breaking elongation of the spunlace nonwoven fabric, wherein the test results are as follows;
TABLE 1
As is clear from the data in Table 1, the nonwoven fabrics obtained in examples 1 to 3 exhibited good tensile strength and elongation at break, and the hydroentangled nonwoven fabric exhibited good strength and toughness. In the comparative example 1, the cellulose acetate is not subjected to carboxylation treatment, and is directly immersed in polydopamine solution, the intermolecular binding force between the cellulose and the polydopamine is reduced, and the strength and the toughness of the obtained spunlace non-woven fabric are lower than those of the spunlace non-woven fabric in the example 2, so that the mechanical property defects such as low strength of the cellulose acetate and the like can be improved by treating the cellulose acetate with polydopamine and succinic anhydride. In comparative example 4, the strength of the spunlace nonwoven fabric finally obtained by mixing and lapping the acetate fibers, the polyethylene fibers and the polylactic acid fibers is lower than that of example 2, thereby illustrating that the four-layer structure in the invention can obtain better mechanical properties.
The spunlace nonwoven fabric prepared in the embodiment 1-3 has good antibacterial performance, and the removal rate of staphylococcus aureus, escherichia coli and candida albicans can reach more than 97%; in comparative example 2, when lysozyme was loaded on the polylactic acid fiber, swelling treatment was not performed, resulting in a smaller amount of lysozyme loaded on the polylactic acid fiber, and thus a decrease in the bacteriostatic rate. In the comparative example 3, the non-woven fabric is reinforced by adopting the hot spray melting process, and the process temperature is higher, and lysozyme loaded in the polylactic acid fiber is inactivated due to high temperature, so that the bacteriostasis rate of the spunlace non-woven fabric is suddenly reduced, and the positive effect of the lysozyme on the bacteriostasis rate is also described.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A moisture-absorbing and bacteriostatic spunlace nonwoven fabric is characterized in that; the spunlace non-woven fabric is prepared by double spunlace reinforcement of a four-layer fiber net consisting of polyethylene fibers, acetate fibers, polylactic acid fibers and polyethylene fibers.
2. A moisture-absorbing and bacteriostatic spunlace nonwoven fabric according to claim 1, which is characterized in that: before spunlace reinforcement, the polyethylene fibers, the acetate fibers and the polylactic acid fibers are subjected to impregnation treatment by antioxidant and flame retardant solution.
3. A moisture-absorbing and bacteriostatic spunlace nonwoven fabric according to claim 1, which is characterized in that: the acetate fiber is mainly prepared by the reaction of cellulose acetate, succinic anhydride and polydopamine.
4. A moisture-absorbing and bacteriostatic spunlace nonwoven fabric according to claim 2, which is characterized in that: the antioxidant is any one or more of pentaerythritol ester, phosphite ester and thiodipropionate antioxidant.
5. A moisture-absorbing and bacteriostatic spunlace nonwoven fabric according to claim 2, which is characterized in that: the flame retardant is any one or more of melamine, melamine cyanurate and melamine phosphate.
6. A preparation method of a moisture-absorbing and bacteriostatic spunlace non-woven fabric is characterized by comprising the following steps: comprises the following steps;
(1) preparing acetate fiber:
(2) pretreatment of polylactic acid fiber:
(3) preparing a finished product of the spunlace non-woven fabric.
7. The method for preparing moisture-absorbing and bacteriostatic spunlace nonwoven fabric according to claim 6, which is characterized by comprising the following steps of: comprises the following steps;
(1) preparing cellulose acetate, namely dissolving cellulose acetate in an acetone solvent, adding an absolute ethanol solution, standing to form a precipitate, and filtering to remove an upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated cellulose acetate 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, performing suction filtration to remove impurities, and drying to obtain carboxylated cellulose acetate;
dissolving carboxyl cellulose acetate in a dimethylformamide solvent, adding a polydopamine solution, uniformly stirring, dropwise adding a concentrated sulfuric acid solution, reacting, filtering, washing with deionized water, and spinning to obtain acetate fibers;
(2) pretreatment of polylactic acid fiber: immersing polylactic acid fiber in a sodium hydroxide solution, dissolving in water, heating, and swelling; filtering to remove a sodium hydroxide solution, rinsing with deionized water, adding a lysozyme buffer solution into the swollen polylactic acid fiber, and standing to obtain lysozyme-loaded polylactic acid fiber for later use;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers treated in the step (2) and the polyethylene fibers into an antioxidant and flame retardant solution, filtering, drying and carding to form single fibers, paving four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, transversely carding, drafting and leveling the fiber nets, carrying out spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying and rolling to obtain a moisture-absorbing and bacteria-inhibiting spunlace finished product.
8. The method for preparing moisture-absorbing and bacteriostatic spunlace nonwoven fabric according to claim 7, which is characterized by comprising the following steps: comprises the following steps;
(1) preparing acetate fiber, dissolving cellulose acetate in acetone solvent, heating to 65-70 deg.C, stirring, cooling to 27-32 deg.C, adding anhydrous ethanol solution, standing to form precipitate, and vacuum filtering to remove upper layer solution to obtain pretreated cellulose acetate;
dissolving pretreated cellulose acetate in an acetone solution, adding succinic anhydride and triethylamine, stirring, raising the temperature to 65-70 ℃, reacting for 20-24h, cooling to 27-32 ℃, adding an anhydrous ethanol solution, standing to form a precipitate, performing suction filtration to remove impurities, and drying to obtain carboxylated cellulose acetate;
dissolving carboxylated cellulose acetate in a dimethylformamide solvent, adding a polydopamine solution, uniformly stirring, dropwise adding a concentrated sulfuric acid solution, reacting at the temperature of 70-80 ℃ for 20-30min, filtering, washing with deionized water, and spinning to obtain cellulose acetate;
(2) pretreatment of polylactic acid fiber: immersing polylactic acid fiber in 5mol/L sodium hydroxide solution, dissolving in water, heating, controlling the temperature at 70-80 ℃, and swelling for 30-40 min; filtering to remove sodium hydroxide solution, rinsing with deionized water, cooling to 20-25 deg.C, adding lysozyme buffer solution into the swollen polylactic acid fiber, and standing for 40-60min to obtain lysozyme-loaded polylactic acid fiber;
(3) preparing a finished spunlace non-woven fabric product: and (2) in a dust-free environment, soaking the acetate fibers prepared in the step (1), the polylactic acid fibers treated in the step (2) and the polyethylene fibers into an antioxidant and flame retardant solution, filtering, drying and carding to form single fibers, paving four layers of fiber nets according to the sequence of the polyethylene fibers, the acetate fibers, the polylactic acid fibers and the polyethylene fibers, transversely carding, drafting and leveling the fiber nets, carrying out spunlace reinforcement, stretching, secondary spunlace reinforcement, natural drying and rolling to obtain a moisture-absorbing and bacteria-inhibiting spunlace finished product.
9. A method for preparing a moisture-absorbing and bacteria-inhibiting spunlace nonwoven fabric according to any one of claims 7 to 8, wherein the method comprises the following steps: the lysozyme buffer solution in the step (2) is prepared by mixing lysozyme and 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution; the pH value of the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 7.0-7.5; the volume ratio of the lysozyme to the 4-hydroxyethyl piperazine ethanesulfonic acid buffer solution is 2: 1.
10. The method for preparing moisture-absorbing and bacteriostatic spunlace nonwoven fabric according to claim 9, which is characterized by comprising the following steps: the process conditions of the water jet in the step (3) are as follows: the spunlace reinforcement process adopts 3-5 spunlace heads, the spunlace pressure is 30-45Mpa, and the secondary spunlace reinforcement process adopts 2-3 spunlace heads, and the spunlace pressure is 5-15 Mpa.
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| CN114318671B (en) | 2023-06-30 |
| CN113005634B (en) | 2022-07-19 |
| CN114318671A (en) | 2022-04-12 |
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