CN112593406B - Multifunctional non-woven fabric and preparation method thereof - Google Patents
Multifunctional non-woven fabric and preparation method thereof Download PDFInfo
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- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
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- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
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- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/76—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon oxides or carbonates
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- D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
- D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
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- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
- D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol
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- 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
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- D06M2200/50—Modified hand or grip properties; Softening compositions
Abstract
The invention discloses a preparation method of a multifunctional non-woven fabric, which comprises the following steps: A. preparing high-pore volume high-air-permeability moisture-permeable impregnation slurry; B. immersing the PET non-woven fabric into the high-pore volume high-air-permeability moisture-permeable impregnation slurry, pressing, solidifying, washing, and drying to obtain a pretreated PET impregnated non-woven fabric; C. preparing high-pore-volume high-air-permeability moisture-permeable blade coating slurry; E. coating the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry on the pretreated PET impregnated non-woven fabric by adopting a scraper, wherein the first coating thickness is 50 +/-1 g per square meter, and drying the pre-treated PET impregnated non-woven fabric to be semi-dry at 75 ℃; then, the second coating is carried out, the thickness of the second coating is 40 +/-1 g per square meter, and the second coating is dried at 102 ℃. The multifunctional non-woven fabric obtained by the invention has high antiviral activity on African swine fever and large odor reduction rate; the normal emissivity is high; the bacteriostatic and antibacterial effects are good; excellent mechanical properties such as tensile strength, soft hand feeling, good air permeability and good comprehensive use performance.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a multifunctional non-woven fabric and a preparation method thereof.
Background
The non-woven fabric is also called non-woven fabric, is formed by oriented or random fibers, is a new generation of environment-friendly material, has the characteristics of moisture resistance, air permeability, light weight, no combustion supporting, easy decomposition, no toxicity, no irritation, rich colors, low price, recycling and the like, and is called as the fabric due to the appearance and certain properties of the fabric.
Nonwoven fabrics are widely used in the hygiene field such as topsheet materials for high-grade disposable absorbent articles, and other related fields. But the functions are mainly embodied by using chemical agents to obtain the functions such as disinfection, antibiosis and the like, or adding related physical materials to obtain a certain single function.
Ethylene-vinyl acetate copolymer (EVA) is used as a high molecular polymer material, has good plasticity, elasticity and processability, and the EVA material subjected to foaming treatment has the advantages of low density, good mechanical property, easy coloring and the like, so the EVA is often widely applied to various sole materials.
The EVA rubber plastic product is a novel environment-friendly plastic foaming material, has the advantages of good buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance and the like, and is non-toxic and non-absorbent. The EVA rubber-plastic product can be processed and formed by design, has better shock resistance than traditional foaming materials such as polystyrene (foam) and the like, meets the requirement of environmental protection, and is widely applied to the fields of manufacture of technical slippers, beach sandals, health slippers and leisure slippers, bag linings, children jigsaw toys, bath boards, sanitary ware sealing gaskets, plastic floors, sound and heat insulation, car seat cushions, fishing net floats and the like.
However, the multifunctional nonwoven fabric is required to have not only excellent mechanical properties such as tensile strength, soft hand feeling, good air permeability and the like, but also good antibacterial and deodorizing effects.
However, the currently used footwear materials have the following problems:
1. has no antiviral activity to African Swine Fever (ASF) with antiviral activity, and can not meet the requirements of some special working environments;
2. the antibacterial effect is poor;
3. the adsorption performance to peculiar smell is poor, and the deodorization effect is poor;
4. but also cannot give consideration to good antibacterial and deodorizing effects, excellent mechanical properties such as tensile strength and the like, soft hand feeling, good air permeability and other comprehensive properties.
Based on the situation, the invention provides a multifunctional non-woven fabric and a preparation method thereof, which can effectively solve the problems.
Disclosure of Invention
The invention aims to provide a multifunctional non-woven fabric and a preparation method thereof. The multifunctional non-woven fabric is prepared by selecting raw materials and optimizing the content of each raw material, so that the advantages of the non-woven fabric are fully exerted, the non-woven fabric and the raw materials complement each other and promote each other, the quality of a product is improved, and the antiviral activity rate of the prepared multifunctional non-woven fabric on antiviral activity African Swine Fever (ASF) is more than 99.99 percent; the odor reduction rate is high (the odor removal rate is high); the normal emissivity is high, which shows that micro pores are densely distributed in the structure of the material, so that the material has the effect similar to a black body, has good adsorption effect on peculiar smell, and has high pore volume and high air and moisture permeability; the antibacterial effect on staphylococcus aureus and various bacteria such as escherichia coli, candida albicans and the like is good; in addition, the mechanical properties such as tensile strength and the like are excellent, the hand feeling is softer, the air permeability is good, and the comprehensive service performance is good.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a preparation method of multifunctional non-woven fabric comprises the following steps:
A. preparing impregnation slurry with high pore volume, high air permeability and moisture permeability;
the high-pore volume high-air-permeability moisture-permeable impregnation slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer a:28 to 35 portions of,
20-24 wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 40 to 55 portions of,
10-14 wt% aqueous polyvinyl alcohol solution: 25 to 32 portions of,
Dispersing agent: 1 to 3 portions of,
Compound antibacterial powder: 3-10 parts;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-permeability impregnation slurry, uniformly stirring and mixing, and then adding water to adjust the viscosity to 9000-11000 CPS so as to obtain the high-pore-volume high-air-permeability moisture-permeability impregnation slurry;
B. immersing the PET non-woven fabric with the gram weight of 400-600 g/m < 2 > into the high-pore-volume high-air-permeability and moisture-permeability impregnating slurry with the temperature of 25-28 ℃, pressing, solidifying, washing and drying to obtain a pretreated PET impregnated non-woven fabric;
C. preparing high-pore-volume high-air-permeability moisture-permeable blade coating slurry;
the high-pore-volume high-air-permeable and moisture-permeable blade coating slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer B:11 to 15.5 portions of,
20-24 wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 40 to 55 portions of,
10-14 wt% polyvinyl alcohol aqueous solution: 25 to 32 portions of,
Dispersing agent: 1 to 3 portions of,
Compound antibacterial powder: 3-10 parts;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry, and uniformly stirring and mixing to obtain the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry;
D. coating the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry on the pretreated PET impregnated non-woven fabric by adopting a scraper, wherein the first coating thickness is 50 +/-1 g per square meter, and drying the pre-treated PET impregnated non-woven fabric to be semi-dry at 75 ℃; then, the second coating is carried out, the thickness of the second coating is 40 +/-1 g per square meter, and the second coating is dried at 102 ℃.
Preferably, the composite antibacterial powder is prepared from the following raw materials in parts by weight:
pre-treating crystalline calcite powder: 80 to 95 portions of,
High-purity nano crystalline flake graphite powder: 1 to 5 portions of,
Silver ion powder: 1 to 5 portions of,
Copper ion powder: 1-5 parts.
Preferably, the preparation method of the pretreated crystalline calcite powder is as follows:
putting transparent crystal calcite powder with the granularity of 4000-5000 meshes into a reaction container, adding 98% concentrated sulfuric acid with the mass of 0.8-1.2 times that of the transparent crystal calcite powder, controlling the temperature to be 50-55 ℃, and stirring for reaction for 30-40 min; and then sequentially washing and drying to obtain the pretreated crystal calcite powder.
Preferably, the copper ion powder is nano copper ion powder; the silver ion powder is nano silver ion powder.
Preferably, the ethylene-vinyl acetate copolymer A is a mixture consisting of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5-37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5-18.5%, and the mass ratio of the two is 1:0.14 to 0.18.
Preferably, the ethylene-vinyl acetate copolymer B is a mixture consisting of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5-37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5-18.5%, and the mass ratio of the ethylene-vinyl acetate copolymer B to the vinyl acetate copolymer B is 1:0.32 to 0.36.
Preferably, the particle size of the large-aperture hollow silica nanoparticles in the 20-24 wt% aqueous dispersion of large-aperture hollow silica nanoparticles is 180 +/-5 nm, and the pore size is 30-50 nm.
Preferably, the dispersing agent is a mixture of polyvinylpyrrolidone PVP-K30 and formaldehyde-free fixing agent DUR, and the mass ratio of the polyvinylpyrrolidone PVP-K30 to the formaldehyde-free fixing agent DUR is 1:0.35 to 0.38.
A multifunctional non-woven fabric is prepared by adopting the preparation method of the multifunctional non-woven fabric.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the multifunctional non-woven fabric is prepared by selecting raw materials and optimizing the content of each raw material, so that the advantages of the non-woven fabric are fully exerted, the non-woven fabric and the raw materials complement each other and promote each other, the quality of a product is improved, and the antiviral activity rate of the prepared multifunctional non-woven fabric on antiviral activity African Swine Fever (ASF) is more than 99.99 percent; the odor reduction rate is high (the odor removal rate is high); the normal emissivity is high, which shows that micro pores are densely distributed in the structure of the material to form the effect similar to a black body, the adsorption effect on peculiar smell is good, and the material has high pore volume and high air permeability and moisture permeability; the bacteriostatic rate to staphylococcus aureus, and the bacteriostatic and antibacterial effects to various bacteria such as escherichia coli, candida albicans and the like are good; in addition, the mechanical properties such as tensile strength and the like are excellent, the hand feeling is softer, the air permeability is good, and the comprehensive service performance is good.
The multifunctional non-woven fabric is firstly soaked and then coated, so that the mechanical properties such as tensile strength and the like are excellent, the hand feeling is softer, and the use requirement of the composite fabric is met;
preferably, the ethylene-vinyl acetate copolymer is added in a proper proportion, the ethylene-vinyl acetate copolymer A is a mixture consisting of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5-37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5-18.5%, and the mass ratio of the two is 1:0.14 to 0.18. Preferably, the ethylene-vinyl acetate copolymer B is a mixture consisting of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5-37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5-18.5%, and the mass ratio of the ethylene-vinyl acetate copolymer B to the vinyl acetate copolymer B is 1:0.32 to 0.36. Thus, the good mechanical property can be ensured, and the soft hand feeling and the dispersion compatibility with other raw materials in the raw material system can be ensured; thereby ensuring that the antiviral activity rate of the prepared multifunctional non-woven fabric on antiviral activity African Swine Fever (ASF) is more than 99.99 percent; the odor reduction rate is high (the odor removal rate is high); the normal emissivity is high, which shows that micro pores are densely distributed in the structure of the material to form the effect similar to a black body, the adsorption effect on peculiar smell is good, and the material has high pore volume and high air permeability and moisture permeability; the antibacterial effect on staphylococcus aureus and various bacteria such as escherichia coli, candida albicans and the like is good; in addition, the mechanical properties such as tensile strength and the like are excellent, the hand feeling is soft, the air permeability is good, and the comprehensive use performance is good.
40-55 parts of large-aperture hollow silica nanoparticle aqueous dispersion with a proper proportion are added into the multifunctional non-woven fabric, wherein the particle size of the large-aperture hollow silica nanoparticles in the 20-24 wt% of large-aperture hollow silica nanoparticle aqueous dispersion is 180 +/-5 nm, and the pore size is 30-50 nm. The raw material has large aperture and moderate particle size, is easy to be uniformly dispersed in the raw material system so as to form good micropore effect, ensures that micro pores are densely distributed in the structure to form the effect similar to a black body, and further ensures that the antiviral activity rate of the prepared multifunctional non-woven fabric on antiviral activity African Swine Fever (ASF) is more than 99.99 percent; the odor reduction rate is high (the odor removal rate is high); the normal emissivity is high, which shows that micro pores are densely distributed in the structure of the material, so that the material has the effect similar to a black body, has good adsorption effect on peculiar smell, and has high pore volume and high air and moisture permeability; the bacteriostatic rate to staphylococcus aureus, and the bacteriostatic and antibacterial effects to various bacteria such as escherichia coli, candida albicans and the like are good; in addition, the mechanical properties such as tensile strength and the like are excellent, the hand feeling is soft, the air permeability is good, and the comprehensive use performance is good.
The multifunctional non-woven fabric is added with the polyvinyl alcohol aqueous solution with the weight percent of 10-14% in a proper proportion. The ethylene-vinyl acetate copolymer is mainly used for forming a good dispersion effect with the ethylene-vinyl acetate copolymer, and is uniform gelatinized liquid after being mixed with other raw materials such as the ethylene-vinyl acetate copolymer and the like.
1-3 parts of a dispersant in a proper proportion is added into the multifunctional non-woven fabric, the dispersant is a mixture of polyvinylpyrrolidone PVP-K30 and a formaldehyde-free fixing agent DUR, and the mass ratio of the polyvinylpyrrolidone PVP-K30 to the DUR is 1:0.35 to 0.38.
Through a large number of experiments, the inventor finds that the formaldehyde-free color fixing agent DUR is a high-molecular formaldehyde-free color fixing agent and has a good dispersing effect on inorganic components, and the mass ratio of the high-molecular formaldehyde-free color fixing agent DUR to the inorganic components is 1:0.35 to 0.38 of polyvinylpyrrolidone PVP-K30 and a formaldehyde-free fixing agent DUR are compounded to be used as a composite dispersing agent, the two are mutually matched to play a good synergistic effect, in the raw material system, the composite antibacterial powder, the large-aperture hollow silica nano particles and the like are more easily and uniformly dispersed, so that the prepared multifunctional non-woven fabric is ensured to have an antiviral activity rate of more than 99.99 percent for antiviral activity African Swine Fever (ASF); the odor reduction rate is high (the odor removal rate is high); the normal emissivity is high, which shows that micro pores are densely distributed in the structure of the material to form the effect similar to a black body, the adsorption effect on peculiar smell is good, and the material has high pore volume and high air permeability and moisture permeability; the bacteriostatic rate to staphylococcus aureus, and the bacteriostatic and antibacterial effects to various bacteria such as escherichia coli, candida albicans and the like are good; in addition, the mechanical properties such as tensile strength and the like are excellent, the hand feeling is soft, the air permeability is good, and the comprehensive use performance is good.
The multifunctional non-woven fabric is added with the specially-made composite antibacterial powder in a proper proportion, and is prepared from the following raw materials in parts by weight: 80-95 parts of pretreated crystal calcite powder, 1-5 parts of high-purity nano flake graphite powder, 1-5 parts of silver ion powder and 1-5 parts of copper ion powder.
The copper ion powder is nano copper ion powder; the silver ion powder is nano silver ion powder.
The preparation method of the pretreated crystal calcite powder comprises the following steps:
putting transparent crystal calcite powder with the granularity of 4000-5000 meshes into a reaction container, adding 98% concentrated sulfuric acid with the mass of 0.8-1.2 times that of the transparent crystal calcite powder, controlling the temperature to be 50-55 ℃, and stirring for reaction for 30-40 min; and then sequentially washing and drying to obtain the pretreated crystal calcite powder.
Therefore, the pretreated crystal calcite powder also has larger aperture, the aperture and the aperture density are uniform, the particle size of the pretreated crystal calcite powder is moderate, the pretreated crystal calcite powder is easy to disperse uniformly in the raw material system, and the pretreated crystal calcite powder is matched with large-aperture hollow silica nanoparticles to play a good synergistic effect, so that the multifunctional non-woven fabric disclosed by the invention forms a good micropore effect, ensures that micro-pores are densely distributed in the structure to form a black body-like effect, can adsorb partial nano copper ion powder and nano silver ion powder, ensures that the nano copper ion powder and the nano silver ion powder slowly release the antibacterial effect, and improves the durability of the antibacterial effect while ensuring the good antibacterial effect; the high-purity nano crystalline flake graphite powder (with strong infrared wave scattering property and capable of improving antistatic effect) is matched with the silver ion powder and the copper ion powder, so that a good synergistic effect is achieved, the antibacterial effect of the multifunctional non-woven fabric is greatly improved, and the antiviral activity rate of the multifunctional non-woven fabric on antiviral activity African Swine Fever (ASF) is more than 99.99%; the deodorizing effect of the multifunctional non-woven fabric is further ensured; thereby ensuring that the antiviral activity rate of the prepared multifunctional non-woven fabric on the antiviral activity African Swine Fever (ASF) is more than 99.99 percent; the odor reduction rate is high (the odor removal rate is high); the normal emissivity is high, which shows that micro pores are densely distributed in the structure of the material to form the effect similar to a black body, the adsorption effect on peculiar smell is good, and the material has high pore volume and high air permeability and moisture permeability; the antibacterial effect on staphylococcus aureus and various bacteria such as escherichia coli, candida albicans and the like is good; in addition, the mechanical properties such as tensile strength and the like are excellent, the hand feeling is soft, the air permeability is good, and the comprehensive use performance is good.
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 all conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
The flake graphite varieties are classified according to the carbon content: if the carbon content is between 99.99 and 99.9 percent, the graphite is high-purity graphite; the carbon content is 99-94% and is high carbon graphite; the carbon content of 93-80% is medium carbon graphite; the carbon content is 75-50% and is low carbon graphite. The high-purity nano crystalline flake graphite powder is nano high-purity graphite powder or nano high-purity crystalline flake graphite powder.
A formaldehyde-free fixing agent DUR, which is a formaldehyde-free fixing agent DUR of Shanghai auxiliary agent factory Co., ltd;
PVP-K30, chinese name: polyvinylpyrrolidone, trade name: polyvinylpyrrolidone PVP-K30.
Example 1:
a preparation method of multifunctional non-woven fabric comprises the following steps:
A. preparing high-pore volume high-air-permeability moisture-permeable impregnation slurry;
the high pore volume high air and moisture permeable impregnation slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer a:28 to 35 portions of,
20-24 wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 40 to 55 portions of,
10-14 wt% polyvinyl alcohol aqueous solution: 25 to 32 portions of,
Dispersing agent: 1 to 3 portions of,
Compound antibacterial powder: 3-10 parts;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-permeable impregnation slurry, uniformly stirring and mixing, and then adding water to adjust the viscosity to 9000-11000 CPS to obtain the high-pore-volume high-air-permeability moisture-permeable impregnation slurry;
B. immersing the PET non-woven fabric with the gram weight of 400-600 g/m < 2 > into the high-pore-volume high-air-permeability and moisture-permeability impregnating slurry with the temperature of 25-28 ℃, pressing, solidifying, washing and drying to obtain a pretreated PET impregnated non-woven fabric;
C. preparing high-pore volume high-air-permeability moisture-penetrability blade coating slurry;
the high-pore-volume high-air-permeable and moisture-permeable blade coating slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer B:11 to 15.5 portions of,
20-24 wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 40 to 55 portions of,
10-14 wt% polyvinyl alcohol aqueous solution: 25 to 32 portions of,
Dispersing agent: 1 to 3 portions of,
Compound antibacterial powder: 3-10 parts;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-permeability blade coating slurry, and uniformly stirring and mixing to obtain the high-pore-volume high-air-permeability moisture-permeability blade coating slurry;
D. coating the high-pore volume high-air-permeability moisture-penetrability blade coating slurry on the pretreated PET impregnated non-woven fabric by adopting a scraper, wherein the first coating thickness is 50 +/-1 g per square meter, and drying the coated slurry to be semi-dry at 75 ℃; then, the second coating is carried out, the thickness of the second coating is 40 +/-1 g per square meter, and the second coating is dried at 102 ℃.
Preferably, the composite antibacterial powder is prepared from the following raw materials in parts by weight:
pre-treating crystalline calcite powder: 80 to 95 portions of,
High-purity nano flake graphite powder: 1 to 5 portions of,
Silver ion powder: 1 to 5 portions of,
Copper ion powder: 1-5 parts.
Preferably, the preparation method of the pretreated crystalline calcite powder is as follows:
putting transparent crystal calcite powder with the granularity of 4000-5000 meshes into a reaction container, adding 98% concentrated sulfuric acid with the mass of 0.8-1.2 times of that of the transparent crystal calcite powder, controlling the temperature to be 50-55 ℃, and stirring for reaction for 30-40 min; and then sequentially washing and drying to obtain the pretreated crystal calcite powder.
Preferably, the copper ion powder is nano copper ion powder; the silver ion powder is nano silver ion powder.
Preferably, the ethylene-vinyl acetate copolymer A is a mixture consisting of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5-37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5-18.5%, and the mass ratio of the two is 1:0.14 to 0.18.
Preferably, the ethylene-vinyl acetate copolymer B is a mixture consisting of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5-37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5-18.5%, and the mass ratio of the ethylene-vinyl acetate copolymer B to the vinyl acetate copolymer B is 1:0.32 to 0.36.
Preferably, the particle size of the large-aperture hollow silica nanoparticles in the 20-24 wt% aqueous dispersion of large-aperture hollow silica nanoparticles is 180 +/-5 nm, and the pore size is 30-50 nm.
Preferably, the dispersant is a mixture of polyvinylpyrrolidone PVP-K30 and formaldehyde-free fixing agent DUR, and the mass ratio of the polyvinylpyrrolidone PVP-K30 to the DUR is 1:0.35 to 0.38.
A multifunctional non-woven fabric is prepared by adopting the preparation method of the multifunctional non-woven fabric.
Example 2:
a preparation method of multifunctional non-woven fabric comprises the following steps:
A. preparing impregnation slurry with high pore volume, high air permeability and moisture permeability;
the high-pore volume high-air-permeability moisture-permeable impregnation slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer a:28 parts of,
20wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 40 portions of,
10wt% aqueous polyvinyl alcohol solution: 25 portions of,
Dispersing agent: 1 part of,
Compound antibacterial powder: 3 parts of a mixture;
respectively weighing each raw material of the high-pore-volume high-air-permeability and moisture-permeability impregnation slurry, uniformly stirring and mixing, and then adding water to adjust the viscosity to 9000CPSCPS to obtain the high-pore-volume high-air-permeability and moisture-permeability impregnation slurry;
B. soaking the PET non-woven fabric with the gram weight of 400g/m < 2 > into the high-pore-volume high-air-permeability and moisture-permeability impregnation slurry at the temperature of 25 ℃, pressing, solidifying, washing with water, and drying to obtain a pretreated PET impregnated non-woven fabric;
C. preparing high-pore-volume high-air-permeability moisture-permeable blade coating slurry;
the high-pore volume high-air-permeability moisture-penetrability blade coating slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer B:11 parts of,
20wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 40 portions of,
10wt% aqueous polyvinyl alcohol solution: 25 portions of,
Dispersing agent: 1 part of,
Compound antibacterial powder: 3 parts of a mixture;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-permeability blade coating slurry, and uniformly stirring and mixing to obtain the high-pore-volume high-air-permeability moisture-permeability blade coating slurry;
D. coating the high-pore volume high-air-permeability moisture-penetrability blade coating slurry on the pretreated PET impregnated non-woven fabric by adopting a scraper, wherein the first coating thickness is 50 +/-1 g per square meter, and drying the coated slurry to be semi-dry at 75 ℃; then, the second coating is carried out, the thickness of the second coating is 40 +/-1 g per square meter, and the second coating is dried at 102 ℃.
In this embodiment, the composite antibacterial powder is prepared from the following raw materials in parts by weight:
pretreatment of crystalline calcite powder: 80 portions of,
High-purity nano flake graphite powder: 1 part of,
Silver ion powder: 1 part of,
Copper ion powder: 1 part.
In this example, the preparation of the pretreated crystalline calcite powder was as follows:
putting transparent crystal calcite powder with the granularity of 4000 meshes into a reaction container, adding 98% concentrated sulfuric acid with the mass of 0.8 time of that of the transparent crystal calcite powder, controlling the temperature to be 50 ℃, and stirring for reaction for 40min; and then sequentially washing and drying to obtain the pretreated crystal calcite powder.
In this embodiment, the copper ion powder is a nano copper ion powder; the silver ion powder is nano silver ion powder.
In this embodiment, the ethylene-vinyl acetate copolymer a is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5%, and the mass ratio of the two is 1:0.14.
in this embodiment, the ethylene-vinyl acetate copolymer B is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5%, and the mass ratio of the two is 1:0.32.
in this example, the 20wt% aqueous dispersion of large-pore hollow silica nanoparticles had a particle size of 180. + -.5 nm and a pore size of 30 to 50nm.
In this embodiment, the dispersant is a mixture of polyvinylpyrrolidone PVP-K30 and formaldehyde-free fixing agent DUR, and the mass ratio of the two is 1:0.35 to 0.38.
In this embodiment, a multifunctional nonwoven fabric is prepared by the method for preparing a multifunctional nonwoven fabric as described above.
Example 3:
a preparation method of multifunctional non-woven fabric comprises the following steps:
A. preparing impregnation slurry with high pore volume, high air permeability and moisture permeability;
the high-pore volume high-air-permeability moisture-permeable impregnation slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer a:35 parts of,
24wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 55 parts of,
14wt% aqueous polyvinyl alcohol solution: 32 parts of,
Dispersing agent: 3 portions of,
Compound antibacterial powder: 10 parts of (A);
respectively weighing each raw material of the high-pore-volume high-air-permeability and moisture-permeability impregnation slurry, uniformly stirring and mixing, and then adding water to adjust the viscosity to 11000CPS, so as to obtain the high-pore-volume high-air-permeability and moisture-permeability impregnation slurry;
B. immersing the PET non-woven fabric with the gram weight of 600g/m < 2 > into the high-pore volume high-air-permeability and moisture-permeability impregnation slurry at the temperature of 28 ℃ and pressing, and then solidifying, washing and drying to obtain a pretreated PET impregnated non-woven fabric;
C. preparing high-pore-volume high-air-permeability moisture-permeable blade coating slurry;
the high-pore-volume high-air-permeable and moisture-permeable blade coating slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer B:15.5 portions of,
24wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 55 parts of,
14wt% aqueous polyvinyl alcohol solution: 32 parts of,
Dispersing agent: 3 portions of,
Compound antibacterial powder: 10 parts of a binder;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-permeability blade coating slurry, and uniformly stirring and mixing to obtain the high-pore-volume high-air-permeability moisture-permeability blade coating slurry;
D. coating the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry on the pretreated PET impregnated non-woven fabric by adopting a scraper, wherein the first coating thickness is 50 +/-1 g per square meter, and drying the pre-treated PET impregnated non-woven fabric to be semi-dry at 75 ℃; then, the second coating is carried out, the thickness of the second coating is 40 +/-1 g per square meter, and the second coating is dried at 102 ℃.
In this embodiment, the composite antibacterial powder is prepared from the following raw materials in parts by weight:
pre-treating crystalline calcite powder: 95 parts of,
High-purity nano crystalline flake graphite powder: 5 portions of,
Silver ion powder: 5 portions of,
Copper ion powder: 5 parts of the raw materials.
In this example, the preparation of the pretreated crystalline calcite powder was as follows:
putting transparent crystal calcite powder with the granularity of 5000 meshes into a reaction container, adding 98% concentrated sulfuric acid with the mass of 1.2 times of that of the transparent crystal calcite powder, controlling the temperature to be 55 ℃, and stirring for reaction for 30min; and then sequentially washing and drying to obtain the pretreated crystal calcite powder.
In this embodiment, the copper ion powder is a nano copper ion powder; the silver ion powder is nano silver ion powder.
In this embodiment, the ethylene-vinyl acetate copolymer a is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 18.5%, and the mass ratio of the two is 1:0.18.
in this embodiment, the ethylene-vinyl acetate copolymer B is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 18.5%, and the mass ratio of the two is 1:0.36.
in this example, the particle size of the large-pore hollow silica nanoparticles in the 24wt% aqueous dispersion of large-pore hollow silica nanoparticles was 180. + -.5 nm, and the pore size was 30 to 50nm.
In this embodiment, the dispersant is a mixture of polyvinylpyrrolidone PVP-K30 and formaldehyde-free fixing agent DUR, and the mass ratio of the two is 1:0.35 to 0.38.
In this embodiment, a multifunctional nonwoven fabric is prepared by the method for preparing a multifunctional nonwoven fabric as described above.
Example 4:
a preparation method of multifunctional non-woven fabric comprises the following steps:
A. preparing high-pore volume high-air-permeability moisture-permeable impregnation slurry;
the high pore volume high air and moisture permeable impregnation slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer a:31.5 parts of,
22wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 47.5 parts of,
12wt% aqueous polyvinyl alcohol solution: 28.5 parts of,
Dispersing agent: 2 portions of,
Compound antibacterial powder: 6.5 parts;
respectively weighing each raw material of the high-pore-volume high-air-permeability and moisture-permeability impregnation slurry, uniformly stirring and mixing, and then adding water to adjust the viscosity to 10000CPS, so as to obtain the high-pore-volume high-air-permeability and moisture-permeability impregnation slurry;
B. immersing the PET non-woven fabric with the gram weight of 500g/m < 2 > into the high-pore volume high-air-permeability and moisture-permeability impregnation slurry at the temperature of 26.5 ℃, pressing, solidifying, washing with water, and drying to obtain a pretreated PET impregnated non-woven fabric;
C. preparing high-pore volume high-air-permeability moisture-penetrability blade coating slurry;
the high-pore-volume high-air-permeable and moisture-permeable blade coating slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer B:13.3 parts of,
22wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 47.5 parts of,
12wt% aqueous polyvinyl alcohol solution: 28.5 parts of,
Dispersing agent: 2 portions of,
Compound antibacterial powder: 6.5 parts;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry, and uniformly stirring and mixing to obtain the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry;
D. coating the high-pore-volume high-air-permeability moisture-penetrability blade coating slurry on the pretreated PET impregnated non-woven fabric by adopting a scraper, wherein the first coating thickness is 50 +/-1 g per square meter, and drying the pre-treated PET impregnated non-woven fabric to be semi-dry at 75 ℃; then, the second coating is carried out, the thickness of the second coating is 40 +/-1 g per square meter, and the second coating is dried at 102 ℃.
In this embodiment, the composite antibacterial powder is prepared from the following raw materials in parts by weight:
pretreatment of crystalline calcite powder: 87.5 parts of,
High-purity nano crystalline flake graphite powder: 3 portions of,
Silver ion powder: 3 portions of,
Copper ion powder: and 3 parts.
In this example, the preparation of the pretreated crystalline calcite powder was as follows:
putting transparent crystal calcite powder with the granularity of 4500 meshes into a reaction container, adding 98% concentrated sulfuric acid with the mass 1 time that of the transparent crystal calcite powder, controlling the temperature to be 53 ℃, and stirring to react for 35min; and then sequentially washing and drying to obtain the pretreated crystal calcite powder.
In this embodiment, the copper ion powder is a nano copper ion powder; the silver ion powder is nano silver ion powder.
In this embodiment, the ethylene-vinyl acetate copolymer a is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 36.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 17.5%, and the mass ratio of the two is 1:0.16.
in this embodiment, the ethylene-vinyl acetate copolymer B is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 36.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 17.5%, and the mass ratio of the two is 1:0.34.
in this example, the 22wt% aqueous dispersion of large-pore hollow silica nanoparticles had a particle size of 180. + -.5 nm and a pore size of 30 to 50nm.
In this embodiment, the dispersant is a mixture of polyvinylpyrrolidone PVP-K30 and formaldehyde-free fixing agent DUR, and the mass ratio of the two is 1:0.35 to 0.38.
In this embodiment, a multifunctional nonwoven fabric is prepared by the method for preparing a multifunctional nonwoven fabric as described above.
The performance tests of the multifunctional non-woven fabrics obtained in the embodiments 2 to 4 of the invention show that:
the multifunctional non-woven fabrics obtained in the embodiments 2 to 4 of the invention have an antiviral activity rate of more than 99.99% against antiviral activity of African Swine Fever (ASF);
in addition, the multifunctional nonwoven fabrics obtained in embodiments 2 to 4 of the present invention have a bacteriostatic rate against staphylococcus aureus of 99% or more, a bacteriostatic rate against escherichia coli of 96.4% or more, and a bacteriostatic rate against candida albicans of 95.5% or more.
The multifunctional non-woven fabrics obtained in the embodiments 2 to 4 of the invention are 10cm to 10cm, ammonia is used as a pollutant, the test time is 2h, and the test result is as follows: the blank test concentration of the odor component was 94uL/L, whereas the multi-functional nonwoven fabrics obtained in examples 2 to 4 of the present invention were 10cm by 10cm, the test concentration of the odor component was 0.53uL/L or less, the odor reduction rate was 99.47% or more, and the test concentration of the odor component was as low as 0.37uL/L (example 4).
The normal emissivity test results of the multifunctional non-woven fabrics obtained in the embodiments 2 to 4 of the invention are above 0.82, and the normal emissivity is as high as 0.84 (embodiment 4).
In addition, the multifunctional non-woven fabrics obtained in the embodiments 2 to 4 of the invention have excellent mechanical properties such as tensile strength, soft hand feeling, good air permeability and good comprehensive use performance.
The above are only preferred embodiments of the present invention, and it should be noted that the above preferred embodiments 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 should be considered to be within the scope of the invention.
Claims (7)
1. The preparation method of the multifunctional non-woven fabric is characterized by comprising the following steps:
A. preparing impregnation slurry with high pore volume, high air permeability and moisture permeability;
the high-pore volume high-air-permeability moisture-permeable impregnation slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer a:28 to 35 portions of,
20-24 wt% of large-aperture hollow silica nanoparticle aqueous dispersion: 40 to 55 portions of,
10-14 wt% aqueous polyvinyl alcohol solution: 25 to 32 portions of,
Dispersing agent: 1 to 3 portions of,
Compound antibacterial powder: 3-10 parts;
respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-permeability impregnation slurry, uniformly stirring and mixing, and then adding water to adjust the viscosity to 9000-11000 CPS so as to obtain the high-pore-volume high-air-permeability moisture-permeability impregnation slurry;
B. immersing the PET non-woven fabric with the gram weight of 400-600 g/m < 2 > into the high-pore-volume high-air-permeability and moisture-permeability impregnating slurry with the temperature of 25-28 ℃, pressing, solidifying, washing and drying to obtain a pretreated PET impregnated non-woven fabric;
C. preparing high-pore-volume high-air-permeability moisture-permeable blade coating slurry;
the high-pore volume high-air-permeability moisture-penetrability blade coating slurry is prepared from the following raw materials in parts by weight:
ethylene-vinyl acetate copolymer B:11 to 15.5 portions of,
10-14 wt% polyvinyl alcohol aqueous solution: 25 to 32 portions of,
Respectively weighing each raw material of the high-pore-volume high-air-permeability moisture-permeability blade coating slurry, and uniformly stirring and mixing to obtain the high-pore-volume high-air-permeability moisture-permeability blade coating slurry;
D. coating the high-pore volume high-air-permeability moisture-penetrability blade coating slurry on the pretreated PET impregnated non-woven fabric by adopting a scraper, wherein the first coating thickness is 50 +/-1 g per square meter, and drying the coated slurry to be semi-dry at 75 ℃; then, coating for the second time, wherein the thickness of the coating for the second time is 40 +/-1 g per square meter, and drying at 102 ℃;
the composite antibacterial powder is prepared from the following raw materials in parts by weight:
pre-treating crystalline calcite powder: 80 to 95 portions of,
High-purity nano flake graphite powder: 1 to 5 portions of,
Silver ion powder: 1 to 5 portions of,
Copper ion powder: 1-5 parts;
the preparation method of the pretreated crystalline calcite powder comprises the following steps:
putting transparent crystal calcite powder with the granularity of 4000-5000 meshes into a reaction container, adding 98% concentrated sulfuric acid with the mass of 0.8-1.2 times of that of the transparent crystal calcite powder, controlling the temperature to be 50-55 ℃, and stirring for reaction for 30-40 min; and then sequentially washing and drying to obtain the pretreated crystal calcite powder.
2. The method for preparing the multifunctional non-woven fabric according to claim 1, wherein the copper ion powder is nano copper ion powder; the silver ion powder is nano silver ion powder.
3. The method for preparing a multifunctional nonwoven fabric according to claim 1, wherein the ethylene-vinyl acetate copolymer A is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5 to 37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5 to 18.5%, and the mass ratio of the two is 1:0.14 to 0.18.
4. The method for preparing a multifunctional nonwoven fabric according to claim 1, wherein the ethylene-vinyl acetate copolymer B is a mixture of an ethylene-vinyl acetate copolymer with a vinyl acetate content of 35.5 to 37.5% and an ethylene-vinyl acetate copolymer with a vinyl acetate content of 16.5 to 18.5%, and the mass ratio of the two is 1: 0.32-0.36.
5. The method of claim 1, wherein the aqueous dispersion of 20-24 wt% of the hollow silica nanoparticles has a particle size of 180 ± 5nm and a pore size of 30-50 nm.
6. The preparation method of the multifunctional non-woven fabric according to claim 1, wherein the dispersing agent is a mixture of polyvinylpyrrolidone PVP-K30 and formaldehyde-free fixing agent DUR, and the mass ratio of the polyvinylpyrrolidone PVP-K30 to the DUR is 1:0.35 to 0.38.
7. A multifunctional nonwoven fabric produced by the method for producing a multifunctional nonwoven fabric according to any one of claims 1 to 6.
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| CN111636207A (en) * | 2020-06-17 | 2020-09-08 | 胡明华 | Preparation method of high-moisture-absorption antibacterial non-woven fabric based on polypropylene fibers |
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| CN104382278A (en) * | 2014-12-04 | 2015-03-04 | 起步（中国）有限公司 | Antibacterial deodorizing children's shoe lining |
| CN108441131A (en) * | 2018-06-12 | 2018-08-24 | 深圳日高胶带新材料有限公司 | A kind of low VOC environmental protection sterilization adhesive tape |
| CN109056321A (en) * | 2018-07-27 | 2018-12-21 | 望江汇通纺织有限公司 | A kind of preparation method of the medical non-woven fabrics of anti-bacterial wet-absorbing |
| CN111636207A (en) * | 2020-06-17 | 2020-09-08 | 胡明华 | Preparation method of high-moisture-absorption antibacterial non-woven fabric based on polypropylene fibers |
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