CN110670242B - Antibacterial non-woven fabric and manufacturing process thereof - Google Patents
Antibacterial non-woven fabric and manufacturing process thereof Download PDFInfo
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- CN110670242B CN110670242B CN201911020807.0A CN201911020807A CN110670242B CN 110670242 B CN110670242 B CN 110670242B CN 201911020807 A CN201911020807 A CN 201911020807A CN 110670242 B CN110670242 B CN 110670242B
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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
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- 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
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/13—Physical properties anti-allergenic or anti-bacterial
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses an antibacterial non-woven fabric and a manufacturing process thereof, wherein the antibacterial non-woven fabric is prepared from composite fibers by a spunlace non-woven fabric production process; the composite fiber has a sheath-core structure, including a core layer and a sheath layer; the cross section of the core layer is in a regular pentagon shape, the outer surface of the core layer is coated with the skin layer, and the cross section of the skin layer is in a circular shape; the ratio of the cross-sectional areas of the core layer and the skin layer is 1: (0.28-0.35); the core layer is prepared from the following raw materials in parts by weight: 95-100 parts of polyethylene terephthalate, 2-5 parts of hydroxyl-terminated polysiloxane emulsion, 2-3.5 parts of pentaerythritol adipate and 10-15 parts of filler. The antibacterial non-woven fabric is excellent in antibacterial performance and good in antibacterial effect; the fracture strength is high, and the mechanical property is good; in addition, the elastic fabric has good elasticity and softness.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to an antibacterial non-woven fabric and a manufacturing process thereof.
Background
The fiber for producing the non-woven fabric is mainly polypropylene (PP) and Polyester (PET). In addition, there are Polyamide (PA), viscose, acrylic, polyethylene (HDPE), polyvinyl chloride (PVC). The non-woven fabric is classified into a disposable type and a durable type according to application requirements.
The production process comprises the following steps:
1. water-jetting non-woven fabric: the spunlace process is to spray high-pressure fine water flow onto one or more layers of fiber webs to entangle the fibers with each other, so that the fiber webs are reinforced and have certain strength.
2. Heat sealing the non-woven fabric: the thermal bonding non-woven fabric is formed by adding fibrous or powdery hot melt bonding reinforcing materials into a fiber web, and heating, melting, cooling and reinforcing the fiber web into a fabric.
3. Pulp air-laid nonwoven fabric: the air-laid nonwoven fabric can be called as dust-free paper and dry papermaking nonwoven fabric. It adopts the air-laid technology to open the wood pulp fiber board into single fiber state, then uses the air-laid method to make the fiber agglutinate on the net-forming curtain, then the net is consolidated into cloth.
4. Wet non-woven fabric: the wet-process non-woven fabric is made up through opening the raw fibre material in water medium to obtain single fibre, mixing different fibre materials to obtain fibre suspension pulp, delivering the suspension pulp to net-forming mechanism, and wet-forming and solidifying.
5. Spun-bonded nonwoven fabric: spunbond nonwoven fabrics are nonwoven fabrics formed by extruding and drawing a polymer to form continuous filaments, laying the filaments into a web, and then converting the web into a nonwoven fabric by autogenous bonding, thermal bonding, chemical bonding, or mechanical consolidation.
6. Melt-blown nonwoven fabric: the process of melt-blown non-woven fabric comprises the following steps: polymer feeding, melt extrusion, fiber formation, fiber cooling, web forming and cloth reinforcement.
7. Needling the non-woven fabric: the needle-punched non-woven fabric is one of dry non-woven fabrics, and the needle-punched non-woven fabric is formed by reinforcing a fluffy fiber web into a fabric by utilizing the piercing effect of a needle.
8. Stitching and knitting non-woven fabrics: stitchbonded nonwovens are one type of dry-laid nonwovens that are made by consolidating webs, layers of yarn, nonwoven materials (e.g., plastic sheets, plastic foils, etc.), or combinations thereof, with a warp-knitted loop structure.
9. Hydrophilic non-woven fabric: the method is mainly used for producing medical and sanitary materials so as to obtain better hand feeling and prevent the skin from being scratched. Like sanitary napkins and sanitary pads, the hydrophilic function of hydrophilic nonwoven fabrics is utilized.
However, the antibacterial nonwoven fabric used at present has the following problems:
1. the antibacterial effect is poor, the mechanical properties such as breaking strength and the like of the prepared antibacterial non-woven fabric are poor due to the fact that a large amount of antibacterial filler is used, and the application range is limited;
2. the mode of impregnating the surface with the antibacterial agent or adding the small-molecular antibacterial agent is easy to seep out and dissolve in a solvent or water, so that the antibacterial effect is easily and greatly weakened, and even the antibacterial effect is lost.
Disclosure of Invention
Based on the above situation, the present invention is directed to an antibacterial nonwoven fabric and a manufacturing process thereof, which can effectively solve the above problems.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an antibacterial non-woven fabric is prepared by carrying out a spunlace non-woven fabric production process on composite fibers;
the composite fiber has a sheath-core structure, including a core layer and a sheath layer; the cross section of the core layer is in a regular pentagon shape, the outer surface of the core layer is coated with the skin layer, and the cross section of the skin layer is in a circular shape; the ratio of the cross-sectional areas of the core layer and the skin layer is 1: (0.28-0.35);
the core layer is prepared from the following raw materials in parts by weight: 95-100 parts of polyethylene terephthalate, 2-5 parts of hydroxyl-terminated polysiloxane emulsion (the invention is mainly used for improving the flexibility of products by introducing the hydroxyl-terminated polysiloxane emulsion with a proper proportion, and also can improve the fluidity of a mixture during melt mixing, and simultaneously improve the compatibility of raw materials, and in addition, because of the hydroxyl-terminated polysiloxane emulsion, a small amount of hydroxyl-terminated polysiloxane can react with hexamethylene diisocyanate at high temperature to increase the bonding firmness with a skin layer), 2-3.5 parts of pentaerythritol adipate (the invention is mainly used for plasticizing by introducing the pentaerythritol adipate with a proper proportion and has good compatibility with the polyethylene terephthalate), and 10-15 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 55-65 parts of polyethylene terephthalate, 30-35 parts of polyether polyurethane elastomer, 10-13 parts of maleic anhydride grafted ethylene-octene copolymer (the polyether polyurethane elastomer and the maleic anhydride grafted ethylene-octene copolymer are both elastomers and have good compatibility in a raw material composition system and are mainly used for improving the mechanical property of finally prepared non-woven fabric), 2.5-4.5 parts of hydroxyl-terminated polysiloxane emulsion (the invention introduces the hydroxyl-terminated polysiloxane emulsion with a proper proportion and is mainly used for improving the flexibility of a product, also can improve the fluidity of a mixture during melt mixing and simultaneously improves the compatibility of the raw materials, in addition, as the hydroxyl-terminated polysiloxane emulsion is provided, part of the hydroxyl-terminated polysiloxane can react with hexamethylene diisocyanate at high temperature to generate mild crosslinking), 3-5 parts of hexamethylene diisocyanate and 5-9 parts of silver-zirconium loaded ion exchange resin, 2-4 parts of dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and 8-12 parts of a filler.
Preferably, the ratio of the cross-sectional areas of the core layer and the skin layer is 1: 0.32 of;
the core layer is prepared from the following raw materials in parts by weight: 97.5 parts of polyethylene terephthalate, 3.5 parts of hydroxyl-terminated polysiloxane emulsion, 2.8 parts of pentaerythritol adipate and 12.5 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 60 parts of polyethylene terephthalate, 32.5 parts of polyether polyurethane elastomer, 11.5 parts of maleic anhydride grafted ethylene-octene copolymer, 3.3 parts of hydroxyl-terminated polysiloxane emulsion, 4 parts of hexamethylene diisocyanate, 7.2 parts of silver-zirconium loaded ion exchange resin, 3 parts of dimethyloctadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and 10 parts of filler.
Preferably, the preparation method of the silver-zirconium loaded ion exchange resin comprises the following steps:
s1, preparing a silver-zirconium loading solution:
using silver nitrate (AgNO)3) Zirconyl nitrate hydrate (ZrO (NO)3)2·6H2O), concentrated nitric acid and deionized water to prepare a silver-zirconium load solution containing 1.15-1.45 mol/L of silver ions, 0.18-0.26 mol/L of zirconium ions and 4-6% of nitric acid concentration;
s2, weighing ion exchange resin, adding the ion exchange resin into a reaction container, adding the silver-zirconium load solution in an amount which is 40-50 times the weight of the ion exchange resin, and stirring for 4-6 hours at room temperature under a 8-10T superconducting strong magnetic field;
s3, stopping stirring, standing for 2-4 h, performing suction filtration, separating the reacted ion exchange resin, and adding the separated ion exchange resin into a sodium hydroxide (NaOH) solution with the mass concentration of 5-7% to soak for 20-30 min;
s4, performing suction filtration, separating the ion exchange resin in the sodium hydroxide (NaOH) solution, washing the ion exchange resin to be neutral by using deionized water, drying, and crushing to 200-500 meshes to obtain the silver-zirconium loaded ion exchange resin.
Preferably, silver nitrate (AgNO) is used in step S13) Zirconyl nitrate hydrate (ZrO (NO)3)2·6H2O), concentrated nitric acid and deionized water to prepare silver-zirconium load solution containing 1.34mol/L silver ions, 0.22mol/L zirconium ions and 5.5 percent nitric acid.
Preferably, in step S2, the ion exchange resin is a D301 type anion exchange resin.
Preferably, the pH of the solution is maintained above 9 throughout the soaking step S3.
Preferably, in step S4, the drying is performed by vacuum drying, and the drying temperature is controlled to be 50 to 60 ℃.
Preferably, the maleic anhydride grafting ratio of the maleic anhydride grafted ethylene-octene copolymer is 0.9-1.2%.
Preferably, the filler is nano calcium carbonate.
The invention also provides a manufacturing process of the antibacterial non-woven fabric, which comprises the following steps:
A. respectively weighing the raw materials of the core layer in parts by weight: polyethylene glycol terephthalate, hydroxyl-terminated polysiloxane emulsion, pentaerythritol adipate and filler are uniformly mixed and dried for later use; weighing the raw materials of the cortex respectively according to the parts by weight: polyethylene terephthalate, polyether polyurethane elastomer, maleic anhydride grafted ethylene-octene copolymer, hydroxyl-terminated polysiloxane emulsion, hexamethylene diisocyanate, ion exchange resin loaded with silver-zirconium, dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and filler, uniformly mixing and drying for later use;
B. feeding the raw materials of the core layer into a double-screw extruder to be melted into a core layer mixed melt; feeding the raw materials of the skin layer into a single screw extruder to be melted into a skin layer mixed melt;
C. the core layer mixed melt and the skin layer mixed melt enter a composite spinning machine, are sprayed out from a composite spinneret plate after being subjected to melt distribution to form a strand silk with a skin-core structure of the core layer and the skin layer, and are subjected to air blowing cooling, stretching and winding to obtain composite fibers; the fineness of the composite fiber is 2-5 dtex;
D. carding the composite fibers into a web, then carrying out spunlace reinforcement and drying to obtain the antibacterial non-woven fabric;
in the step B, the heating section of the double-screw extruder is 6 sections, and the heating temperature is 222-232 ℃, 236-242 ℃, 250-255 ℃, 260-265 ℃, 268-272 ℃ and 272-285 ℃ in sequence; the heating section of the single-screw extruder is 5 sections, and the heating temperature is 222-230 ℃, 236-246 ℃, 253-259 ℃, 265-272 ℃ and 275-280 ℃ in sequence; in the step F, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of the carding machine is 760-820 m/min, the rotating speed of a working roller is 60-68 m/min, and the rotating speed of a stripping roller is 78-86 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 5-9; the pressure range of the plurality of the water stabs is 40-48 bar.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the antibacterial non-woven fabric is prepared from composite fibers through a spunlace non-woven fabric production process, wherein the composite fibers have a skin-core structure and comprise a core layer and a skin layer, the core layer and the skin layer are respectively selected from raw materials, the content of each raw material is optimized, the advantages of the composite fibers are fully exerted, the composite fibers complement each other and promote each other, and the prepared antibacterial non-woven fabric has excellent antibacterial performance and good antibacterial effect; the modified polyurethane elastomer has high breaking strength and good mechanical property, and also has good elasticity (mainly the addition of the polyether polyurethane elastomer and the maleic anhydride grafted ethylene-octene copolymer) and softness (mainly the addition of the hydroxyl-terminated polysiloxane emulsion).
The antibacterial non-woven fabric is added with the ion exchange resin loaded with silver-zirconium and dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride which are used as composite antibacterial agents in proper proportion, the composite antibacterial agents are matched with other components, the compatibility is good, the composite antibacterial agent is uniformly dispersed in matrix materials (polyethylene terephthalate, polyether polyurethane elastomer, maleic anhydride grafted ethylene-octene copolymer and the like), the bonding strength is high, and the prepared antibacterial non-woven fabric has excellent antibacterial performance and good antibacterial effect; and the antibacterial agent (component) is not easy to seep out, is not easy to dissolve in a solvent or water, and has a long antibacterial effect.
According to the antibacterial non-woven fabric, the ratio of the cross-sectional areas of the core layer and the skin layer is controlled, so that the prepared antibacterial non-woven fabric is ensured to have excellent antibacterial performance, and the breaking strength is also ensured to be high; meanwhile, the addition of the silver-zirconium loaded ion exchange resin and dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride as the composite antibacterial agent is saved, and the cost of raw materials is saved.
The invention has simple manufacturing process and simple and convenient operation, and saves manpower and equipment cost.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
an antibacterial non-woven fabric is prepared by carrying out a spunlace non-woven fabric production process on composite fibers;
the composite fiber has a sheath-core structure, including a core layer and a sheath layer; the cross section of the core layer is in a regular pentagon shape, the outer surface of the core layer is coated with the skin layer, and the cross section of the skin layer is in a circular shape; the ratio of the cross-sectional areas of the core layer and the skin layer is 1: (0.28-0.35);
the core layer is prepared from the following raw materials in parts by weight: 95-100 parts of polyethylene terephthalate, 2-5 parts of hydroxyl-terminated polysiloxane emulsion, 2-3.5 parts of pentaerythritol adipate and 10-15 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 55-65 parts of polyethylene terephthalate, 30-35 parts of polyether polyurethane elastomer, 10-13 parts of maleic anhydride grafted ethylene-octene copolymer, 2.5-4.5 parts of hydroxyl-terminated polysiloxane emulsion, 3-5 parts of hexamethylene diisocyanate, 5-9 parts of silver-zirconium loaded ion exchange resin, 2-4 parts of dimethyl octadecyl [3- (trimethoxy silicon-based) propyl ] ammonium chloride and 8-12 parts of filler.
Preferably, the ratio of the cross-sectional areas of the core layer and the skin layer is 1: 0.32 of;
the core layer is prepared from the following raw materials in parts by weight: 97.5 parts of polyethylene terephthalate, 3.5 parts of hydroxyl-terminated polysiloxane emulsion, 2.8 parts of pentaerythritol adipate and 12.5 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 60 parts of polyethylene terephthalate, 32.5 parts of polyether polyurethane elastomer, 11.5 parts of maleic anhydride grafted ethylene-octene copolymer, 3.3 parts of hydroxyl-terminated polysiloxane emulsion, 4 parts of hexamethylene diisocyanate, 7.2 parts of silver-zirconium loaded ion exchange resin, 3 parts of dimethyloctadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and 10 parts of filler.
Preferably, the preparation method of the silver-zirconium loaded ion exchange resin comprises the following steps:
s1, preparing a silver-zirconium loading solution:
using silver nitrate (AgNO)3) Zirconyl nitrate hydrate (ZrO (NO)3)2·6H2O), concentrated nitric acid and deionized water to prepare a silver-zirconium load solution containing 1.15-1.45 mol/L of silver ions, 0.18-0.26 mol/L of zirconium ions and 4-6% of nitric acid concentration;
s2, weighing ion exchange resin, adding the ion exchange resin into a reaction container, adding the silver-zirconium load solution in an amount which is 40-50 times the weight of the ion exchange resin, and stirring for 4-6 hours at room temperature under a 8-10T superconducting strong magnetic field;
s3, stopping stirring, standing for 2-4 h, performing suction filtration, separating the reacted ion exchange resin, and adding the separated ion exchange resin into a sodium hydroxide (NaOH) solution with the mass concentration of 5-7% to soak for 20-30 min;
s4, performing suction filtration, separating the ion exchange resin in the sodium hydroxide (NaOH) solution, washing the ion exchange resin to be neutral by using deionized water, drying, and crushing to 200-500 meshes to obtain the silver-zirconium loaded ion exchange resin.
Preferably, silver nitrate (AgNO) is used in step S13) Zirconyl nitrate hydrate (ZrO (NO)3)2·6H2O), concentrated nitric acid and deionized water to prepare silver-zirconium load solution containing 1.34mol/L silver ions, 0.22mol/L zirconium ions and 5.5 percent nitric acid.
Preferably, in step S2, the ion exchange resin is a D301 type anion exchange resin.
Preferably, the pH of the solution is maintained above 9 throughout the soaking step S3.
Preferably, in step S4, the drying is performed by vacuum drying, and the drying temperature is controlled to be 50 to 60 ℃.
Preferably, the maleic anhydride grafting ratio of the maleic anhydride grafted ethylene-octene copolymer is 0.9-1.2%.
Preferably, the filler is nano calcium carbonate.
The embodiment also provides a manufacturing process of the antibacterial non-woven fabric, which comprises the following steps:
A. respectively weighing the raw materials of the core layer in parts by weight: polyethylene glycol terephthalate, hydroxyl-terminated polysiloxane emulsion, pentaerythritol adipate and filler are uniformly mixed and dried for later use; weighing the raw materials of the cortex respectively according to the parts by weight: polyethylene terephthalate, polyether polyurethane elastomer, maleic anhydride grafted ethylene-octene copolymer, hydroxyl-terminated polysiloxane emulsion, hexamethylene diisocyanate, ion exchange resin loaded with silver-zirconium, dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and filler, uniformly mixing and drying for later use;
B. feeding the raw materials of the core layer into a double-screw extruder to be melted into a core layer mixed melt; feeding the raw materials of the skin layer into a single screw extruder to be melted into a skin layer mixed melt;
C. the core layer mixed melt and the skin layer mixed melt enter a composite spinning machine, are sprayed out from a composite spinneret plate after being subjected to melt distribution to form a strand silk with a skin-core structure of the core layer and the skin layer, and are subjected to air blowing cooling, stretching and winding to obtain composite fibers; the fineness of the composite fiber is 2-5 dtex;
D. carding the composite fibers into a web, then carrying out spunlace reinforcement and drying to obtain the antibacterial non-woven fabric;
in the step B, the heating section of the double-screw extruder is 6 sections, and the heating temperature is 222-232 ℃, 236-242 ℃, 250-255 ℃, 260-265 ℃, 268-272 ℃ and 272-285 ℃ in sequence; the heating section of the single-screw extruder is 5 sections, and the heating temperature is 222-230 ℃, 236-246 ℃, 253-259 ℃, 265-272 ℃ and 275-280 ℃ in sequence; in the step F, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of the carding machine is 760-820 m/min, the rotating speed of a working roller is 60-68 m/min, and the rotating speed of a stripping roller is 78-86 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 5-9; the pressure range of the plurality of the water stabs is 40-48 bar.
Example 2:
an antibacterial non-woven fabric is prepared by carrying out a spunlace non-woven fabric production process on composite fibers;
the composite fiber has a sheath-core structure, including a core layer and a sheath layer; the cross section of the core layer is in a regular pentagon shape, the outer surface of the core layer is coated with the skin layer, and the cross section of the skin layer is in a circular shape; the ratio of the cross-sectional areas of the core layer and the skin layer is 1: 0.28;
the core layer is prepared from the following raw materials in parts by weight: 95 parts of polyethylene terephthalate, 2 parts of hydroxyl-terminated polysiloxane emulsion, 2 parts of pentaerythritol adipate and 10 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 55 parts of polyethylene terephthalate, 30 parts of polyether polyurethane elastomer, 10 parts of maleic anhydride grafted ethylene-octene copolymer, 2.5 parts of hydroxyl-terminated polysiloxane emulsion, 3 parts of hexamethylene diisocyanate, 5 parts of silver-zirconium loaded ion exchange resin, 2 parts of dimethyloctadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and 8 parts of filler.
In this embodiment, the preparation method of the silver-zirconium loaded ion exchange resin comprises the following steps:
s1, preparing a silver-zirconium loading solution:
using silver nitrate (AgNO)3) Zirconyl nitrate hydrate (ZrO (NO)3)2·6H2O), concentrated nitric acid and deionized water to prepare silver-zirconium load solution containing 1.15mol/L silver ions, 0.18mol/L zirconium ions and 4 percent nitric acid;
s2, weighing ion exchange resin, adding the ion exchange resin into a reaction container, adding the silver-zirconium load solution which is 40 times of the ion exchange resin in weight, and stirring for 4 hours at room temperature under a 8T superconducting strong magnetic field;
s3, stopping stirring, standing for 2 hours, performing suction filtration, separating the reacted ion exchange resin, and adding the separated ion exchange resin into a sodium hydroxide (NaOH) solution with the mass concentration of 5% to soak for 30 min;
s4, carrying out suction filtration, separating out the ion exchange resin in the sodium hydroxide (NaOH) solution, washing the ion exchange resin to be neutral by using deionized water, drying, and crushing to 200 meshes to obtain the silver-zirconium loaded ion exchange resin.
In this embodiment, in step S2, the ion exchange resin is a D301 type anion exchange resin.
In this example, the pH of the solution was maintained above 9 throughout the soaking process in step S3.
In this embodiment, in step S4, the drying is performed by vacuum drying, and the drying temperature is controlled at 50 ℃.
In this example, the maleic anhydride-grafted ethylene-octene copolymer had a maleic anhydride grafting ratio of 0.9%.
In this embodiment, the filler is nano calcium carbonate.
In this embodiment, the manufacturing process of the antibacterial non-woven fabric includes the following steps:
A. respectively weighing the raw materials of the core layer in parts by weight: polyethylene glycol terephthalate, hydroxyl-terminated polysiloxane emulsion, pentaerythritol adipate and filler are uniformly mixed and dried for later use; weighing the raw materials of the cortex respectively according to the parts by weight: polyethylene terephthalate, polyether polyurethane elastomer, maleic anhydride grafted ethylene-octene copolymer, hydroxyl-terminated polysiloxane emulsion, hexamethylene diisocyanate, ion exchange resin loaded with silver-zirconium, dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and filler, uniformly mixing and drying for later use;
B. feeding the raw materials of the core layer into a double-screw extruder to be melted into a core layer mixed melt; feeding the raw materials of the skin layer into a single screw extruder to be melted into a skin layer mixed melt;
C. the core layer mixed melt and the skin layer mixed melt enter a composite spinning machine, are sprayed out from a composite spinneret plate after being subjected to melt distribution to form a strand silk with a skin-core structure of the core layer and the skin layer, and are subjected to air blowing cooling, stretching and winding to obtain composite fibers; the fineness of the composite fiber is 2 dtex;
D. carding the composite fibers into a web, then carrying out spunlace reinforcement and drying to obtain the antibacterial non-woven fabric;
in the step B, the heating section of the double-screw extruder is 6 sections, and the heating temperature is 222 ℃, 236 ℃, 250 ℃, 260 ℃, 268 ℃ and 272 ℃ in sequence; the heating section of the single-screw extruder is 5 sections, and the heating temperature is 222 ℃, 236 ℃, 253 ℃, 265 ℃ and 275 ℃ in sequence; step F, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of the carding machine is 760m/min, the rotating speed of a working roller is 60m/min, and the rotating speed of a stripping roller is 78 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 5; the pressure range of a plurality of the water stabs is 40 bar.
Example 3:
an antibacterial non-woven fabric is prepared by carrying out a spunlace non-woven fabric production process on composite fibers;
the composite fiber has a sheath-core structure, including a core layer and a sheath layer; the cross section of the core layer is in a regular pentagon shape, the outer surface of the core layer is coated with the skin layer, and the cross section of the skin layer is in a circular shape; the ratio of the cross-sectional areas of the core layer and the skin layer is 1: 0.35;
the core layer is prepared from the following raw materials in parts by weight: 100 parts of polyethylene terephthalate, 5 parts of hydroxyl-terminated polysiloxane emulsion, 3.5 parts of pentaerythritol adipate and 15 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 65 parts of polyethylene terephthalate, 35 parts of polyether polyurethane elastomer, 13 parts of maleic anhydride grafted ethylene-octene copolymer, 4.5 parts of hydroxyl-terminated polysiloxane emulsion, 5 parts of hexamethylene diisocyanate, 9 parts of silver-zirconium loaded ion exchange resin, 4 parts of dimethyloctadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and 12 parts of filler.
In this embodiment, the preparation method of the silver-zirconium loaded ion exchange resin comprises the following steps:
s1, preparing a silver-zirconium loading solution:
using silver nitrate (AgNO)3) Zirconyl nitrate hydrate (ZrO (NO)3)2·6H2O), concentrated nitric acid and deionized water to prepare silver-zirconium load solution containing 1.45mol/L silver ions, 0.26mol/L zirconium ions and 6 percent nitric acid;
s2, weighing ion exchange resin, adding the ion exchange resin into a reaction container, adding the silver-zirconium load solution which is 50 times of the ion exchange resin in weight, and stirring for 6 hours at room temperature under a 10T superconducting strong magnetic field;
s3, stopping stirring, standing for 4 hours, performing suction filtration, separating the reacted ion exchange resin, and adding the separated ion exchange resin into a 7% sodium hydroxide (NaOH) solution to be soaked for 20 min;
s4, carrying out suction filtration, separating out the ion exchange resin in the sodium hydroxide (NaOH) solution, washing the ion exchange resin to be neutral by using deionized water, drying, and crushing to 500 meshes to obtain the silver-zirconium loaded ion exchange resin.
In this embodiment, in step S2, the ion exchange resin is a D301 type anion exchange resin.
In this example, the pH of the solution was maintained above 9 throughout the soaking process in step S3.
In this embodiment, in step S4, the drying is performed by vacuum drying, and the drying temperature is controlled at 60 ℃.
In this example, the maleic anhydride-grafted ethylene-octene copolymer had a maleic anhydride grafting ratio of 1.2%.
In this embodiment, the filler is nano calcium carbonate.
In this embodiment, the manufacturing process of the antibacterial non-woven fabric includes the following steps:
A. respectively weighing the raw materials of the core layer in parts by weight: polyethylene glycol terephthalate, hydroxyl-terminated polysiloxane emulsion, pentaerythritol adipate and filler are uniformly mixed and dried for later use; weighing the raw materials of the cortex respectively according to the parts by weight: polyethylene terephthalate, polyether polyurethane elastomer, maleic anhydride grafted ethylene-octene copolymer, hydroxyl-terminated polysiloxane emulsion, hexamethylene diisocyanate, ion exchange resin loaded with silver-zirconium, dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and filler, uniformly mixing and drying for later use;
B. feeding the raw materials of the core layer into a double-screw extruder to be melted into a core layer mixed melt; feeding the raw materials of the skin layer into a single screw extruder to be melted into a skin layer mixed melt;
C. the core layer mixed melt and the skin layer mixed melt enter a composite spinning machine, are sprayed out from a composite spinneret plate after being subjected to melt distribution to form a strand silk with a skin-core structure of the core layer and the skin layer, and are subjected to air blowing cooling, stretching and winding to obtain composite fibers; the fineness of the composite fiber is 5 dtex;
D. carding the composite fibers into a web, then carrying out spunlace reinforcement and drying to obtain the antibacterial non-woven fabric;
in the step B, the heating section of the double-screw extruder is 6 sections, and the heating temperature is 232 ℃, 242 ℃, 255 ℃, 265 ℃, 272 ℃ and 285 ℃ in sequence; the heating section of the single-screw extruder is 5 sections, and the heating temperature is 230 ℃, 246 ℃, 259 ℃, 272 ℃ and 280 ℃ in sequence; in the step F, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of the carding machine is 820m/min, the rotating speed of a working roller is 68m/min, and the rotating speed of a stripping roller is 86 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 9; the pressure range of a plurality of the water stabs is 48 bar.
Example 4:
an antibacterial non-woven fabric is prepared by carrying out a spunlace non-woven fabric production process on composite fibers;
the composite fiber has a sheath-core structure, including a core layer and a sheath layer; the cross section of the core layer is in a regular pentagon shape, the outer surface of the core layer is coated with the skin layer, and the cross section of the skin layer is in a circular shape; the ratio of the cross-sectional areas of the core layer and the skin layer is 1: 0.32 of;
the core layer is prepared from the following raw materials in parts by weight: 97.5 parts of polyethylene terephthalate, 3.5 parts of hydroxyl-terminated polysiloxane emulsion, 2.8 parts of pentaerythritol adipate and 12.5 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 60 parts of polyethylene terephthalate, 32.5 parts of polyether polyurethane elastomer, 11.5 parts of maleic anhydride grafted ethylene-octene copolymer, 3.3 parts of hydroxyl-terminated polysiloxane emulsion, 4 parts of hexamethylene diisocyanate, 7.2 parts of silver-zirconium loaded ion exchange resin, 3 parts of dimethyloctadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and 10 parts of filler.
In this embodiment, the preparation method of the silver-zirconium loaded ion exchange resin comprises the following steps:
s1, preparing a silver-zirconium loading solution:
s2, weighing ion exchange resin, adding the ion exchange resin into a reaction container, adding 45 parts by weight of the silver-zirconium load solution of the ion exchange resin, and stirring for 5 hours at room temperature under a 9T superconducting strong magnetic field;
s3, stopping stirring, standing for 3 hours, performing suction filtration, separating the reacted ion exchange resin, and adding the separated ion exchange resin into a sodium hydroxide (NaOH) solution with the mass concentration of 6% to soak for 25 min;
s4, carrying out suction filtration, separating out the ion exchange resin in the sodium hydroxide (NaOH) solution, washing the ion exchange resin to be neutral by using deionized water, drying, and crushing to 300 meshes to obtain the silver-zirconium loaded ion exchange resin.
In the present embodiment, in step S1, silver nitrate (AgNO) is used3) Zirconyl nitrate hydrate (ZrO (NO)3)2·6H2O), concentrated nitric acid and deionized water to prepare silver-zirconium load solution containing 1.34mol/L silver ions, 0.22mol/L zirconium ions and 5.5 percent nitric acid.
In this embodiment, in step S2, the ion exchange resin is a D301 type anion exchange resin.
In this example, the pH of the solution was maintained above 9 throughout the soaking process in step S3.
In this embodiment, in step S4, the drying is performed by vacuum drying, and the drying temperature is controlled at 56 ℃.
In this example, the maleic anhydride-grafted ethylene-octene copolymer had a maleic anhydride grafting ratio of 1.0%.
In this embodiment, the filler is nano calcium carbonate.
In this embodiment, the manufacturing process of the antibacterial non-woven fabric includes the following steps:
A. respectively weighing the raw materials of the core layer in parts by weight: polyethylene glycol terephthalate, hydroxyl-terminated polysiloxane emulsion, pentaerythritol adipate and filler are uniformly mixed and dried for later use; weighing the raw materials of the cortex respectively according to the parts by weight: polyethylene terephthalate, polyether polyurethane elastomer, maleic anhydride grafted ethylene-octene copolymer, hydroxyl-terminated polysiloxane emulsion, hexamethylene diisocyanate, ion exchange resin loaded with silver-zirconium, dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and filler, uniformly mixing and drying for later use;
B. feeding the raw materials of the core layer into a double-screw extruder to be melted into a core layer mixed melt; feeding the raw materials of the skin layer into a single screw extruder to be melted into a skin layer mixed melt;
C. the core layer mixed melt and the skin layer mixed melt enter a composite spinning machine, are sprayed out from a composite spinneret plate after being subjected to melt distribution to form a strand silk with a skin-core structure of the core layer and the skin layer, and are subjected to air blowing cooling, stretching and winding to obtain composite fibers; the fineness of the composite fiber is 3 dtex;
D. carding the composite fibers into a web, then carrying out spunlace reinforcement and drying to obtain the antibacterial non-woven fabric;
in the step B, the heating section of the double-screw extruder is 6 sections, and the heating temperature is 228 ℃, 238 ℃, 253 ℃, 262 ℃, 270 ℃ and 281 ℃ in sequence; the heating section of the single-screw extruder is 5 sections, and the heating temperature is 227 ℃, 241 ℃, 255 ℃, 269 ℃ and 278 ℃ in sequence; in the step F, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of the carding machine is 805m/min, the rotating speed of a working roller is 64m/min, and the rotating speed of a stripping roller is 84 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 7; the pressure range of a plurality of the water stabs is 44 bar.
Comparative example 1:
the difference from example 4 is that there is no hydroxyl terminated polysiloxane emulsion, and the other is the same as example 4.
Comparative example 2:
the difference from example 4 is that no maleic anhydride-grafted ethylene-octene copolymer was present, and the rest is the same as example 4.
Comparative example 3:
the difference from example 4 is that the silver-zirconium loaded ion exchange resin was not used, and the other examples were the same as example 4.
Comparative example 4:
the difference from example 4 is that dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride is absent, and the other is the same as example 4.
Comparative example 5:
the difference from example 4 is that no silver-zirconium loaded ion exchange resin and no zirconyl nitrate hydrate were used, and the other examples were the same as example 4.
The following performance tests were performed on the antibacterial nonwoven fabrics obtained in examples 2 to 4 of the present invention and comparative examples 1 to 5 and the common antibacterial nonwoven fabric, and the test results are shown in table 1:
TABLE 1
As can be seen from the above table, the antibacterial non-woven fabric of the present invention has the following advantages: the antibacterial property is excellent, and the antibacterial effect is good; high breaking strength and good mechanical property.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (7)
1. An antibacterial non-woven fabric is characterized in that the antibacterial non-woven fabric is prepared from composite fibers by a spunlace non-woven fabric production process;
the composite fiber has a sheath-core structure, including a core layer and a sheath layer; the cross section of the core layer is in a regular pentagon shape, the outer surface of the core layer is coated with the skin layer, and the cross section of the skin layer is in a circular shape; the ratio of the cross-sectional areas of the core layer and the skin layer is 1: (0.28-0.35);
the core layer is prepared from the following raw materials in parts by weight: 95-100 parts of polyethylene terephthalate, 2-5 parts of hydroxyl-terminated polysiloxane emulsion, 2-3.5 parts of pentaerythritol adipate and 10-15 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 55-65 parts of polyethylene terephthalate, 30-35 parts of polyether polyurethane elastomer, 10-13 parts of maleic anhydride grafted ethylene-octene copolymer, 2.5-4.5 parts of hydroxyl-terminated polysiloxane emulsion, 3-5 parts of hexamethylene diisocyanate, 5-9 parts of silver-zirconium loaded ion exchange resin, 2-4 parts of dimethyl octadecyl [3- (trimethoxy silicon-based) propyl ] ammonium chloride and 8-12 parts of filler;
the preparation method of the silver-zirconium loaded ion exchange resin comprises the following steps:
s1, preparing a silver-zirconium loading solution:
preparing silver-zirconium load solution containing 1.15-1.45 mol/L silver ions, 0.18-0.26 mol/L zirconium ions and 4-6% nitric acid by adopting silver nitrate, zirconyl nitrate hydrate, concentrated nitric acid and deionized water;
s2, weighing ion exchange resin, adding the ion exchange resin into a reaction container, adding the silver-zirconium load solution in an amount which is 40-50 times the weight of the ion exchange resin, and stirring for 4-6 hours at room temperature under a 8-10T superconducting strong magnetic field;
s3, stopping stirring, standing for 2-4 h, performing suction filtration, separating the reacted ion exchange resin, adding the separated ion exchange resin into a sodium hydroxide solution with the mass concentration of 5-7%, and soaking for 20-30 min, wherein the pH value of the solution is kept to be higher than 9 in the whole soaking process;
s4, performing suction filtration, separating the ion exchange resin in the sodium hydroxide solution, washing the ion exchange resin to be neutral by using deionized water, drying the ion exchange resin in a vacuum drying mode at the drying temperature of 50-60 ℃, and crushing the ion exchange resin to be 200-500 meshes after drying to obtain the silver-zirconium loaded ion exchange resin.
2. The antimicrobial nonwoven fabric of claim 1 wherein the ratio of the cross-sectional areas of the core layer and the skin layer is 1: 0.32 of;
the core layer is prepared from the following raw materials in parts by weight: 97.5 parts of polyethylene terephthalate, 3.5 parts of hydroxyl-terminated polysiloxane emulsion, 2.8 parts of pentaerythritol adipate and 12.5 parts of filler;
the skin layer is prepared from the following raw materials in parts by weight: 60 parts of polyethylene terephthalate, 32.5 parts of polyether polyurethane elastomer, 11.5 parts of maleic anhydride grafted ethylene-octene copolymer, 3.3 parts of hydroxyl-terminated polysiloxane emulsion, 4 parts of hexamethylene diisocyanate, 7.2 parts of silver-zirconium loaded ion exchange resin, 3 parts of dimethyloctadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and 10 parts of filler.
3. The antibacterial non-woven fabric according to claim 1, wherein in step S1, silver nitrate, zirconyl nitrate hydrate, concentrated nitric acid and deionized water are used to prepare a silver-zirconium loading solution containing silver ions at 1.34mol/L, zirconium ions at 0.22mol/L and nitric acid at 5.5%.
4. The antibacterial nonwoven fabric according to claim 1, wherein in step S2, the ion exchange resin is a D301 type anion exchange resin.
5. The antibacterial nonwoven fabric according to claim 1, wherein the maleic anhydride graft ratio of the maleic anhydride-grafted ethylene-octene copolymer is 0.9 to 1.2%.
6. The antimicrobial nonwoven fabric of claim 1, wherein the filler is nano calcium carbonate.
7. A process for manufacturing an antibacterial nonwoven fabric according to any one of claims 1 to 6, comprising the steps of:
A. respectively weighing the raw materials of the core layer in parts by weight: polyethylene glycol terephthalate, hydroxyl-terminated polysiloxane emulsion, pentaerythritol adipate and filler are uniformly mixed and dried for later use; weighing the raw materials of the cortex respectively according to the parts by weight: polyethylene terephthalate, polyether polyurethane elastomer, maleic anhydride grafted ethylene-octene copolymer, hydroxyl-terminated polysiloxane emulsion, hexamethylene diisocyanate, ion exchange resin loaded with silver-zirconium, dimethyl octadecyl [3- (trimethoxysilyl) propyl ] ammonium chloride and filler, uniformly mixing and drying for later use;
B. feeding the raw materials of the core layer into a double-screw extruder to be melted into a core layer mixed melt; feeding the raw materials of the skin layer into a single screw extruder to be melted into a skin layer mixed melt;
C. the core layer mixed melt and the skin layer mixed melt enter a composite spinning machine, are sprayed out from a composite spinneret plate after being subjected to melt distribution to form a strand silk with a skin-core structure of the core layer and the skin layer, and are subjected to air blowing cooling, stretching and winding to obtain composite fibers; the fineness of the composite fiber is 2-5 dtex;
D. carding the composite fibers into a web, then carrying out spunlace reinforcement and drying to obtain the antibacterial non-woven fabric;
in the step B, the heating section of the double-screw extruder is 6 sections, and the heating temperature is 222-232 ℃, 236-242 ℃, 250-255 ℃, 260-265 ℃, 268-272 ℃ and 272-285 ℃ in sequence; the heating section of the single-screw extruder is 5 sections, and the heating temperature is 222-230 ℃, 236-246 ℃, 253-259 ℃, 265-272 ℃ and 275-280 ℃ in sequence; in the step F, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of the carding machine is 760-820 m/min, the rotating speed of a working roller is 60-68 m/min, and the rotating speed of a stripping roller is 78-86 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 5-9; the pressure range of the plurality of the water stabs is 40-48 bar.
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| CN113293512A (en) * | 2021-05-22 | 2021-08-24 | 冠和卫生用品有限公司 | Antibacterial skin-friendly non-woven fabric and preparation method thereof |
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| US20020187175A1 (en) * | 2001-05-08 | 2002-12-12 | Petrea Randy D. | Antimicrobial polyurethane films |
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