CN111877001A - High-strength antibacterial non-woven fabric and preparation method thereof - Google Patents
High-strength antibacterial non-woven fabric and preparation method thereof Download PDFInfo
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- CN111877001A CN111877001A CN202010824640.XA CN202010824640A CN111877001A CN 111877001 A CN111877001 A CN 111877001A CN 202010824640 A CN202010824640 A CN 202010824640A CN 111877001 A CN111877001 A CN 111877001A
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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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
- D06M11/83—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 metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
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- 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
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- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
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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
- 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
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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- 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
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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
- D04H1/48—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 in combination with at least one other method of consolidation
- D04H1/485—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 in combination with at least one other method of consolidation in combination with weld-bonding
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- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
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Abstract
The invention discloses a high-strength antibacterial non-woven fabric and a preparation method thereof, wherein the high-strength antibacterial non-woven fabric comprises 52-60 parts of modified polypropylene, 32-37 parts of polyester fiber, 11-15 parts of nano titanium dioxide, 63-70 parts of modified ramie fiber, 25-32 parts of bamboo fiber, 5-9 parts of antibacterial liquid, 3-7 parts of coupling agent and 0.3-0.7 part of antioxidant; the modified polypropylene is mainly prepared by the reaction of a propylene monomer, bromoundecene and triethylamine, and the modified ramie fiber is mainly prepared by the reaction of ramie fiber, graphene oxide and ammonia water; the antibacterial liquid is prepared by compounding aloe extract and silver; through the needling process, the prepared non-woven fabric has the characteristics of high strength and excellent antibacterial and bacteriostatic properties; the invention has reasonable proportion and higher practicability.
Description
Technical Field
The invention relates to the technical field of non-woven fabric production, in particular to a high-strength antibacterial non-woven fabric and a preparation method thereof.
Background
Nonwoven fabrics, also known as nonwovens, are composed of oriented or random fibers and are referred to as fabrics because of their appearance and certain properties. The non-woven fabric has no warp and weft, is very convenient to cut and sew, is light in weight and easy to shape, and is popular with hand fans. The non-woven fabric product is an environment-friendly product internationally recognized as the product for protecting the earth ecology, and has the advantages of rich color, brightness, fashion, environmental protection, wide application, beautiful appearance, various patterns and styles, light weight, environmental protection and recycling. The method is widely applied to the fields of shoemaking, leather making, bedding, decoration, chemical industry, printing, automobiles, building materials, furniture, home furnishing, medical treatment and health care and the like.
With the pursuit of people for healthy life being higher and higher, antibacterial materials are concerned more closely; the non-woven fabric industry is no exception, but the prior antibacterial non-woven fabric has the problem of weak strength, and the high-strength non-woven fabric has slightly poor antibacterial property.
Disclosure of Invention
The invention aims to provide a high-strength antibacterial non-woven fabric and a preparation method thereof, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-strength antibacterial non-woven fabric; the modified polypropylene fiber antibacterial agent comprises, by weight, 52-60 parts of modified polypropylene, 32-37 parts of polyester fiber, 11-15 parts of nano titanium dioxide, 63-70 parts of modified ramie fiber, 25-32 parts of bamboo fiber, 5-9 parts of antibacterial liquid, 3-7 parts of coupling agent and 0.3-0.7 part of antioxidant.
The modified polypropylene is mainly prepared by the reaction of a propylene monomer, bromoundecene and triethylamine. The modified ramie fiber is mainly prepared by reacting ramie fiber, graphene oxide and ammonia water. The antibacterial liquid is Aloe extractive solution-argentum compound solution. The coupling agent is any one of stearic acid, calcium stearate and silane coupling agent. The antioxidant is one or more of antioxidant 1076, antioxidant 1010, antioxidant 168, antioxidant 264, triethyl phosphite, tributyl phosphite and trioctyl phosphite.
A preparation method of a high-strength antibacterial non-woven fabric comprises the following steps;
(1) preparing modified polypropylene;
(2) preparing modified ramie fibers;
(3) preparing an antibacterial liquid;
(4) and preparing the high-strength antibacterial non-woven fabric.
Preferably, the preparation method of the high-strength antibacterial non-woven fabric comprises the following steps; (1) dissolving a propylene monomer and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting at the temperature of 24-27 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A; dissolving the substance A in decalin, and heating to 78-85 ℃ until the substance A is completely dissolved; cooling to 50-55 deg.C, adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen and reacting; vacuumizing; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
the technical scheme of the invention is that propylene monomer and bromoundecene are copolymerized under the action of a catalyst, the main chain of a polypropylene molecule is lengthened, meanwhile, an active group bromine is introduced into a side chain of the polypropylene molecule, and the bromine group on the side chain is subjected to substitution reaction with triethylamine to form a quaternary ammonium salt group-NH3 +Br-The quaternary ammonium salt molecules have good bactericidal effect and can endow the modified polypropylene fibers with antibacterial property; in addition, due to the mutual mechanical action between anion and cation bonds on the molecular chain, the molecular structure is firmer, and the mechanical property is enhanced; thus imparting higher mechanical strength to the nonwoven fabric.
(2) Dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; to obtain a substance B; dissolving the substance B in an acetone solution, dropwise adding a sodium bicarbonate solution, adding ammonia water, stirring, reacting, filtering and washing to obtain a substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring, adding a substance C and solid sodium hydroxide, reacting, and drying in vacuum to obtain modified ramie fibers;
the ramie fiber is a natural plant fiber, has excellent antibacterial property, and particularly has the sterilization rate of over 98 percent for staphylococcus aureus, pseudomonas aeruginosa and escherichia coli; however, because the ramie fiber has a hollow structure inside, the mechanical strength of the ramie fiber is not high; according to the technical scheme, the sodium hydroxide solution and the isopropanol are used for modifying the ramie fibers, so that hydrogen bonds of the treated ramie fibers are reduced, and the intermolecular cohesive force is enhanced; then ammonia water and graphene oxide are mixed, and epoxy groups on the surface of the graphene oxide are connected with amino groups through ring opening at the temperature of 55-60 ℃; and mixing the ramie fibers with the treated ramie fibers, and bonding and connecting amino groups and hydroxyl groups in fiber molecules under the catalytic action of solid sodium hydroxide to obtain the modified ramie fibers with graphene oxide structures, wherein the modified ramie fibers are endowed with the high-strength characteristic of graphene oxide molecules.
(3) Mixing silver nitrate solution with ammonia water, adding aloe extract, performing ultrasonic dispersion, and adding phosphoric acid solution to obtain aloe extract-nano silver compound antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 185-195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, and stacking and paving the composite fibers, the modified ramie fibers and the bamboo fibers into a fiber net; sequentially carrying out one-step pre-needling, three-step main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web to obtain a non-woven fabric; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 10-12h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
The nanometer titanium dioxide is used as the filler, so that the rigidity of the composite fiber can be increased, and the mechanical property of the non-woven fabric can be improved. The addition of the coupling agent ensures that the modified polypropylene, the polyester fiber and the nano titanium dioxide have good intermolecular compatibility and the substances are combined more tightly.
The bamboo fiber is a pure natural cellulose fiber; the antibacterial nonwoven fabric has natural antibacterial, bacteriostatic and ultraviolet-resistant functions, and can directly improve the antibacterial property of nonwoven fabric; meanwhile, the bamboo fiber also has stronger wear resistance, so that the antibacterial property of the non-woven fabric is improved, and the strength is not reduced.
Preferably, the preparation method of the high-strength antibacterial non-woven fabric comprises the following steps; (1) dissolving a propylene monomer and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting for 20-30min at the temperature of 24-27 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A; dissolving the substance A in decalin, and heating to 78-85 ℃ until the substance A is completely dissolved; cooling to 50-55 deg.C, adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen, and reacting for 18-20 h; vacuumizing, wherein the vacuum degree is-0.098 to-0.095 Mpa; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting for 15-20min, filtering, and washing with anhydrous ethanol; to obtain a substance B; dissolving the substance B in an acetone solution, and dropwise adding a sodium bicarbonate solution, wherein the Ph is controlled to be 7.0-8.0; adding ammonia water, stirring, reacting at 55-60 deg.C for 15-20min, filtering, and washing to obtain substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring at the speed of 1000r/min for 30-40min by 800-;
(3) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 8.7-9.5 to obtain aloe extract-nano silver compound antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 185-195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, stacking and paving into a fiber net, wherein the number of layers of the fiber net is 8; laying modified ramie fibers on the 1 st layer, laying bamboo fibers on the 2 nd layer, laying composite fibers on the 3 rd to 6 th layers, laying bamboo fibers on the 7 th layer and laying modified ramie fibers on the 8 th layer; the stacked fiber net sequentially passes through one-step pre-needling, three-step main needling, high-temperature hot rolling and enters a crimping machine for winding; the needling frequency of the pre-needling is 500 needling/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 215-225 ℃; preparing a non-woven fabric, adding the non-woven fabric into the antibacterial solution at a bath ratio of 1:15, standing for 10-12h, and drying to obtain a high-strength antibacterial non-woven fabric finished product.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the polypropylene and the ramie fibers are respectively modified through multi-stage chemical reactions, so that the polypropylene has high strength and sterilization property, and the ramie fibers have excellent antibacterial property and increased strength. The modified polypropylene is mixed with polyester fiber and coupling agent, and then filled with rigid substance nano titanium dioxide to prepare the high-strength modified polypropylene fiber. And (3) needling and hot rolling the polypropylene fibers, the modified ramie fibers and the bamboo fibers at high temperature, and then soaking the polypropylene fibers, the modified ramie fibers and the bamboo fibers in the aloe extract-nano silver antibacterial liquid to obtain the non-woven fabric with high strength and high antibacterial property.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The high-strength antibacterial non-woven fabric comprises, by weight, 52 parts of modified polypropylene, 32 parts of polyester fiber, 11 parts of nano titanium dioxide, 63 parts of modified ramie fiber, 25 parts of bamboo fiber, 5 parts of antibacterial liquid, 3 parts of coupling agent and 0.3 part of antioxidant.
The preparation method of the high-strength antibacterial non-woven fabric comprises the following steps of (1) dissolving propylene monomers and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting for 20min at the temperature of 24 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A;
dissolving the substance A in decalin, and heating to 78 ℃ until the substance A is completely dissolved; cooling to 50 ℃, and adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen, and reacting for 18 hours; vacuumizing to-0.095 MPa; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting for 15min, filtering, and washing with absolute ethanol; to obtain a substance B; dissolving the substance B in an acetone solution, and dropwise adding a sodium bicarbonate solution, wherein the Ph is controlled to be 7.0; adding ammonia water, stirring, reacting for 15min at the temperature of 55 ℃, filtering, and washing to obtain a substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring at the speed of 800r/min for 30min, adding a substance C and solid sodium hydroxide, reacting for 1h, and drying in vacuum to obtain modified ramie fibers;
(3) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 8.7 to obtain antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 185 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, stacking and paving into a fiber net, wherein the number of layers of the fiber net is 8; laying modified ramie fibers on the 1 st layer, laying bamboo fibers on the 2 nd layer, laying composite fibers on the 3 rd to 6 th layers, laying bamboo fibers on the 7 th layer and laying modified ramie fibers on the 8 th layer; sequentially carrying out one-pass pre-needling, three-pass main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web, wherein the needling frequency of the pre-needling is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 215 ℃; preparing non-woven fabrics; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 10h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
Example 2
The high-strength antibacterial non-woven fabric comprises, by weight, 53 parts of modified polypropylene, 35 parts of polyester fiber, 13 parts of nano titanium dioxide, 65 parts of modified ramie fiber, 30 parts of bamboo fiber, 7 parts of antibacterial liquid, 5 parts of coupling agent and 0.4 part of antioxidant.
The preparation method of the high-strength antibacterial non-woven fabric comprises the following steps of (1) dissolving propylene monomers and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting at 25 ℃ for 23 min; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A;
dissolving the substance A in decalin, and heating to 82 ℃ until the substance A is completely dissolved; cooling to 53 ℃, and adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen, and reacting for 19 hours; vacuumizing to-0.096 MPa; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting for 18min, filtering, and washing with absolute ethanol; to obtain a substance B; dissolving the substance B in an acetone solution, and dropwise adding a sodium bicarbonate solution, wherein the Ph is controlled to be 7.5; adding ammonia water, stirring, reacting for 16min at the temperature of 57 ℃, filtering, and washing to obtain a substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring at the speed of 900r/min for 35min, adding a substance C and solid sodium hydroxide, reacting for 1.5h, and drying in vacuum to obtain modified ramie fibers;
(3) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 9.0 to obtain antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 190 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, stacking and paving into a fiber net, wherein the number of layers of the fiber net is 8; laying modified ramie fibers on the 1 st layer, laying bamboo fibers on the 2 nd layer, laying composite fibers on the 3 rd to 6 th layers, laying bamboo fibers on the 7 th layer and laying modified ramie fibers on the 8 th layer; sequentially carrying out one-pass pre-needling, three-pass main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web, wherein the needling frequency of the pre-needling is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 220 ℃; preparing non-woven fabrics; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio of 1:15, standing for 11h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
Example 3
The high-strength antibacterial non-woven fabric comprises, by weight, 60 parts of modified polypropylene, 37 parts of polyester fiber, 15 parts of nano titanium dioxide, 70 parts of modified ramie fiber, 32 parts of bamboo fiber, 9 parts of antibacterial liquid, 7 parts of coupling agent and 0.7 part of antioxidant.
The preparation method of the high-strength antibacterial non-woven fabric comprises the following steps of (1) dissolving propylene monomers and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting for 30min at the temperature of 27 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A;
dissolving the substance A in decalin, and heating to 85 ℃ until the substance A is completely dissolved; cooling to 55 ℃, and adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen, and reacting for 20 hours; vacuumizing to-0.098 MPa; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting for 20min, filtering, and washing with absolute ethanol; to obtain a substance B; dissolving the substance B in an acetone solution, and dropwise adding a sodium bicarbonate solution, wherein the Ph is controlled to be 8.0; adding ammonia water, stirring, reacting at 60 ℃ for 20min, filtering, and washing to obtain a substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring at the speed of 1000r/min for 40min, adding a substance C and solid sodium hydroxide, reacting for 2h, and drying in vacuum to obtain modified ramie fibers;
(3) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 9.5 to obtain antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, stacking and paving into a fiber net, wherein the number of layers of the fiber net is 8; laying modified ramie fibers on the 1 st layer, laying bamboo fibers on the 2 nd layer, laying composite fibers on the 3 rd to 6 th layers, laying bamboo fibers on the 7 th layer and laying modified ramie fibers on the 8 th layer; sequentially carrying out one-pass pre-needling, three-pass main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web, wherein the needling frequency of the pre-needling is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 225 ℃; preparing non-woven fabrics; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 12h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
Comparative example 1
The high-strength antibacterial non-woven fabric comprises, by weight, 60 parts of modified polypropylene, 37 parts of polyester fiber, 15 parts of nano titanium dioxide, 70 parts of modified ramie fiber, 32 parts of bamboo fiber, 9 parts of antibacterial liquid, 7 parts of coupling agent and 0.7 part of antioxidant.
The preparation method of the high-strength antibacterial non-woven fabric comprises the following steps of (1) dissolving propylene monomers and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting for 30min at the temperature of 27 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A;
dissolving the substance A in decalin, and heating to 85 ℃ until the substance A is completely dissolved; cooling to 55 ℃, and adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen, and reacting for 20 hours; vacuumizing to-0.098 MPa; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) mixing graphene oxide and deionized water, and performing ultrasonic dispersion for 20 min; adding ramie fiber and sodium hydroxide solution, and treating at 110 deg.C for 2 hr; vacuum drying to obtain the blending modified ramie fiber;
(3) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 9.5 to obtain antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, stacking and paving into a fiber net, wherein the number of layers of the fiber net is 8; laying modified ramie fibers on the 1 st layer, laying bamboo fibers on the 2 nd layer, laying composite fibers on the 3 rd to 6 th layers, laying bamboo fibers on the 7 th layer and laying modified ramie fibers on the 8 th layer; sequentially carrying out one-pass pre-needling, three-pass main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web, wherein the needling frequency of the pre-needling is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 225 ℃; preparing non-woven fabrics; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 12h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
Comparative example 2
The high-strength antibacterial non-woven fabric comprises, by weight, 60 parts of polypropylene, 37 parts of polyester fiber, 15 parts of nano titanium dioxide, 70 parts of modified ramie fiber, 32 parts of bamboo fiber, 9 parts of antibacterial liquid, 7 parts of coupling agent and 0.7 part of antioxidant.
The preparation method of the high-strength antibacterial non-woven fabric comprises the following steps of (1) dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting for 20min, filtering, and washing with absolute ethyl alcohol; to obtain a substance B; dissolving the substance B in an acetone solution, and dropwise adding a sodium bicarbonate solution, wherein the Ph is controlled to be 8.0; adding ammonia water, stirring, reacting at 60 ℃ for 20min, filtering, and washing to obtain a substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring at the speed of 1000r/min for 40min, adding a substance C and solid sodium hydroxide, reacting for 2h, and drying in vacuum to obtain modified ramie fibers;
(2) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 9.5 to obtain antibacterial solution;
(3) mixing polypropylene, polyester fiber, nano titanium dioxide, a coupling agent and an antioxidant, melting at 195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, stacking and paving into a fiber net, wherein the number of layers of the fiber net is 8; laying modified ramie fibers on the 1 st layer, laying bamboo fibers on the 2 nd layer, laying composite fibers on the 3 rd to 6 th layers, laying bamboo fibers on the 7 th layer and laying modified ramie fibers on the 8 th layer; sequentially carrying out one-pass pre-needling, three-pass main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web, wherein the needling frequency of the pre-needling is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 225 ℃; preparing non-woven fabrics; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 12h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
Comparative example 3
The high-strength antibacterial non-woven fabric comprises, by weight, 60 parts of modified polypropylene, 37 parts of polyester fiber, 15 parts of nano titanium dioxide, 70 parts of ramie fiber, 32 parts of bamboo fiber, 9 parts of antibacterial liquid, 7 parts of coupling agent and 0.7 part of antioxidant.
The preparation method of the high-strength antibacterial non-woven fabric comprises the following steps of (1) dissolving propylene monomers and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting for 30min at the temperature of 27 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A;
dissolving the substance A in decalin, and heating to 85 ℃ until the substance A is completely dissolved; cooling to 55 ℃, and adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen, and reacting for 20 hours; vacuumizing to-0.098 MPa; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 9.5 to obtain antibacterial solution;
(3) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the ramie fibers and the bamboo fibers, stacking and paving the composite fibers, the ramie fibers and the bamboo fibers into a fiber net, wherein the number of layers of the fiber net is 8; paving ramie fibers on the 1 st layer, paving bamboo fibers on the 2 nd layer, paving composite fibers on the 3 rd to 6 th layers, paving bamboo fibers on the 7 th layer and paving ramie fibers on the 8 th layer; sequentially carrying out one-pass pre-needling, three-pass main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web, wherein the needling frequency of the pre-needling is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 225 ℃; preparing non-woven fabrics; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 12h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
Comparative example 4
The high-strength antibacterial non-woven fabric comprises, by weight, 60 parts of polypropylene, 37 parts of polyester fiber, 15 parts of nano titanium dioxide, 70 parts of ramie fiber, 32 parts of bamboo fiber, 9 parts of antibacterial liquid, 7 parts of coupling agent and 0.7 part of antioxidant.
The preparation method of the high-strength antibacterial non-woven fabric comprises the following steps of (1) mixing silver nitrate solution with ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting the pH value to 9.5 to obtain antibacterial solution;
(2) mixing polypropylene, polyester fiber, nano titanium dioxide, a coupling agent and an antioxidant, melting at 195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the ramie fibers and the bamboo fibers, stacking and paving the composite fibers, the ramie fibers and the bamboo fibers into a fiber net, wherein the number of layers of the fiber net is 8; paving ramie fibers on the 1 st layer, paving bamboo fibers on the 2 nd layer, paving composite fibers on the 3 rd to 6 th layers, paving bamboo fibers on the 7 th layer and paving ramie fibers on the 8 th layer; sequentially carrying out one-pass pre-needling, three-pass main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web, wherein the needling frequency of the pre-needling is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 225 ℃; preparing non-woven fabrics; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 12h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
Experimental comparison and analysis
In order to more intuitively prove the beneficial effects of the technical scheme of the invention, a comparison experiment is carried out on the technical scheme of the invention and the prior art; the embodiment 1-3 is the technical scheme of the invention; in the comparative example 1, the modified ramie fibers of the technical scheme are replaced by blending modification of ramie fibers and graphene oxide, and the rest steps are the same as those in the example 3;
in comparative example 2, polypropylene was used in place of the modified polypropylene, and the remaining procedure was the same as in example 3;
in comparative example 3, the modified ramie fibers were replaced with ramie fibers, and the remaining steps were the same as in example 3;
in comparative example 4, polypropylene was used instead of modified polypropylene, and ramie fibers were used instead of modified ramie fibers, and the remaining steps were the same as in example 3;
the mechanical properties of the nonwoven fabrics prepared in examples 1-3 and comparative examples 1-4 were measured, and the measurement data are shown in table 1;
TABLE 1
Antibacterial property detection is carried out on the non-woven fabrics prepared in the examples 1-3 and the comparative examples 1-4, the antibacterial property of the non-woven fabrics is tested according to GB/T21510-2008 nanometer inorganic material antibacterial property detection method by taking escherichia coli and staphylococcus aureus as representatives, and the detection data are shown in Table 2;
TABLE 2
As can be seen from Table 1, the nonwoven fabrics prepared in examples 1 to 3 have higher transverse and longitudinal breaking strengths than those of comparative examples 1 to 4; the non-woven fabric prepared by the technical scheme has higher strength; as shown in Table 2, the removal rates of the non-woven fabrics in the examples 1 to 3 on escherichia coli and golden yellow grape balls are both more than 99.8% and higher than those in the comparative examples 1 to 4; the non-woven fabric prepared by the technical scheme has excellent antibacterial property.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A high-strength antibacterial non-woven fabric is characterized in that: the high-strength antibacterial non-woven fabric comprises, by weight, 52-60 parts of modified polypropylene, 32-37 parts of polyester fiber, 11-15 parts of nano titanium dioxide, 63-70 parts of modified ramie fiber, 25-32 parts of bamboo fiber, 5-9 parts of antibacterial liquid, 3-7 parts of coupling agent and 0.3-0.7 part of antioxidant.
2. The high-strength antibacterial nonwoven fabric according to claim 1, wherein; the modified polypropylene is mainly prepared by the reaction of a propylene monomer, bromoundecene and triethylamine.
3. The high-strength antibacterial nonwoven fabric according to claim 1, wherein; the modified ramie fiber is mainly prepared by reacting ramie fiber, graphene oxide and ammonia water.
4. The high-strength antibacterial nonwoven fabric according to claim 1, wherein; the antibacterial liquid is prepared by compounding aloe extract and silver nitrate solution.
5. The high-strength antibacterial nonwoven fabric according to claim 1, wherein; the coupling agent is any one of stearic acid, calcium stearate and silane coupling agent.
6. The high-strength antibacterial nonwoven fabric according to claim 1, wherein; the antioxidant is any one or combination of more of an antioxidant 1076, an antioxidant 1010, an antioxidant 168, an antioxidant 264, triethyl phosphite, tributyl phosphite and trioctyl phosphite.
7. A preparation method of high-strength antibacterial non-woven fabric is characterized in that; comprises the following steps;
(1) preparing modified polypropylene;
(2) preparing modified ramie fibers;
(3) preparing an antibacterial liquid;
(4) and preparing the high-strength antibacterial non-woven fabric.
8. The method for preparing a high-strength antibacterial non-woven fabric according to claim 7, wherein;
(1) dissolving a propylene monomer and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting at the temperature of 24-27 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A;
dissolving the substance A in decalin, and heating to 78-85 ℃ until the substance A is completely dissolved; cooling to 50-55 deg.C, adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen and reacting; vacuumizing; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; to obtain a substance B; dissolving the substance B in an acetone solution, dropwise adding a sodium bicarbonate solution, adding ammonia water, stirring, reacting, filtering and washing to obtain a substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring, adding a substance C and solid sodium hydroxide, reacting, and drying in vacuum to obtain modified ramie fibers;
(3) mixing silver nitrate solution with ammonia water, adding aloe extract, performing ultrasonic dispersion, and adding phosphoric acid solution to obtain aloe extract-silver compound antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 185-195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, and stacking and paving the composite fibers, the modified ramie fibers and the bamboo fibers into a fiber net; sequentially carrying out one-step pre-needling, three-step main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web to obtain a non-woven fabric; and adding the non-woven fabric into the antibacterial solution, standing and drying to obtain the high-strength antibacterial non-woven fabric finished product.
9. The method for preparing a high-strength antibacterial non-woven fabric according to claim 8, wherein; (1) dissolving a propylene monomer and bromoundecene in a toluene solvent; adding a Ziegler-Natta catalyst, stirring, and reacting for 20-30min at the temperature of 24-27 ℃; adding an ethanol solution, filtering, washing with an acetone solution, and drying to obtain a substance A;
dissolving the substance A in decalin, and heating to 78-85 ℃ until the substance A is completely dissolved; cooling to 50-55 deg.C, adding triethylamine and tetrahydrofuran solvent; maintaining the pressure of nitrogen, and reacting for 18-20 h; vacuumizing, wherein the vacuum degree is-0.098 to-0.095 Mpa; adding absolute ethyl alcohol, filtering, washing with acetone, and drying in vacuum to obtain modified polypropylene;
(2) dissolving graphene oxide in 75% phosphoric acid solution, adding 27.5% hydrogen peroxide solution, stirring, reacting for 15-20min, filtering, and washing with anhydrous ethanol; to obtain a substance B; dissolving the substance B in an acetone solution, and dropwise adding a sodium bicarbonate solution, wherein the Ph is controlled to be 7.0-8.0; adding ammonia water, stirring, reacting at 55-60 deg.C for 15-20min, filtering, and washing to obtain substance C; mixing ramie fibers, a sodium hydroxide solution and isopropanol, stirring at the speed of 1000r/min for 30-40min by 800-;
(3) mixing silver nitrate solution and ammonia water, adding aloe extract, performing ultrasonic dispersion, adding phosphoric acid solution, and adjusting pH to 8.7-9.5 to obtain antibacterial solution;
(4) mixing modified polypropylene, polyester fiber, nano titanium dioxide, coupling agent and antioxidant, melting at 185-195 ℃, outputting through a spinning hole, and drafting to form composite fiber; respectively carding and removing impurities from the composite fibers, the modified ramie fibers and the bamboo fibers, stacking and paving into a fiber net, wherein the number of layers of the fiber net is 8; laying modified ramie fibers on the 1 st layer, laying bamboo fibers on the 2 nd layer, laying composite fibers on the 3 rd to 6 th layers, laying bamboo fibers on the 7 th layer and laying modified ramie fibers on the 8 th layer; sequentially carrying out one-step pre-needling, three-step main needling, high-temperature hot rolling and winding in a crimping machine on the stacked fiber web to obtain a non-woven fabric; adding the non-woven fabric into the antibacterial liquid, keeping the bath ratio at 1:15, standing for 10-12h, and drying to obtain the high-strength antibacterial non-woven fabric finished product.
10. The method for preparing a high-strength antibacterial nonwoven fabric according to any one of claims 8 to 9, characterized in that; the needling frequency of the pre-needling in the step (4) is 500 punches/min, and the needle depth is 12 mm; the frequency of the first main needling is 700 needling/min, and the depth of the needles is 12 mm; the frequency of the second main needling is 700 needling/min, and the depth of the needles is 8 mm; the frequency of the third main needling is 750 needling/min, and the depth of the needles is 5 mm; high-temperature hot rolling, wherein the hot rolling temperature is 215-225 ℃.
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