CN115584597B - Spun-bonded non-woven fabric, preparation method thereof and medical non-woven fabric - Google Patents

Spun-bonded non-woven fabric, preparation method thereof and medical non-woven fabric Download PDF

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Publication number
CN115584597B
CN115584597B CN202211486807.1A CN202211486807A CN115584597B CN 115584597 B CN115584597 B CN 115584597B CN 202211486807 A CN202211486807 A CN 202211486807A CN 115584597 B CN115584597 B CN 115584597B
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woven fabric
spun
antibacterial
solution
beta
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CN115584597A (en
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李波
李进
宁曰文
李军
梁镜华
王京荣
牟延涛
蔡源
张少现
武建军
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Shandong Huaye Non Woven Fabric Co ltd
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Shandong Huaye Non Woven Fabric Co ltd
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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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D01F1/103—Agents inhibiting growth of microorganisms
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/06—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by welding-together thermoplastic fibres, filaments, or yarns
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
    • D06M14/18—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation
    • D06M14/26—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of synthetic origin
    • D06M14/28—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of synthetic origin of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The application relates to the technical field of non-woven fabrics, and particularly discloses a spun-bonded non-woven fabric, a preparation method thereof and a medical non-woven fabric. A spun-bonded non-woven fabric comprises the following raw materials in parts by weight: 90-110 parts of polypropylene, 20-30 parts of low-density polyethylene, 1-3 parts of antibacterial functional powder and 1-2 parts of filler powder; the antibacterial functional powder is prepared by compounding mesoporous zeolite with nano silver ions; the preparation method of the antibacterial functional powder comprises the following steps: dissolving silver nitrate and beta-cyclodextrin in water to prepare solution A; dissolving sodium hydroxide and beta-cyclodextrin in water to prepare a solution B; dissolving beta-cyclodextrin in water, then dropwise adding the solution A and the solution B, adding mesoporous zeolite after dropwise adding is completed, reacting for 24-26 h, carrying out light-shielding treatment, and then filtering, washing and drying to obtain the antibacterial functional powder. The medical non-woven fabric is good in antibacterial effect, strong in antibacterial durability and capable of achieving long-acting bacteriostasis.

Description

Spun-bonded non-woven fabric, preparation method thereof and medical non-woven fabric
Technical Field
The application relates to the technical field of non-woven fabric products, in particular to a spun-bonded non-woven fabric, a preparation method thereof and a medical non-woven fabric.
Background
SMMS non-woven fabrics belongs to the technological extension of SMS non-woven fabrics, is formed by four layers of fibre nets of spunbonded non-woven fabrics + melt-blown non-woven fabrics + meltblown non-woven fabrics hot rolling, belongs to compound non-woven fabrics, and it is the compound product of spunbonded and melt-blown, nontoxic tasteless, high-efficient bacterium isolation.
Medical nonwoven fabrics such as masks, which use SMMS nonwoven fabrics, wherein the melt-blown nonwoven fabrics are subjected to electrostatic electret treatment; the function principle is that the outer spunbonded nonwoven carries out a preliminary interception and inhibition to the bacteria, the bacteria passing through the spunbonded nonwoven are adsorbed on the melt-blown nonwoven under the action of electrostatic adsorption, and the bacteria are prevented from entering the oral cavity to kill the bacteria.
In view of the above-mentioned related technologies, the applicant found that the outer layer spunbonded nonwoven fabric has a weak filtration rate capability, and has a large amount of bacteria entering the meltblown nonwoven fabric layer, so that the electrostatic discharge frequency of the meltblown nonwoven fabric is high, the electrostatic adsorption capability of the meltblown nonwoven fabric is continuously reduced along with the continuous discharge of static, the static adsorption capability is released in the fastest few days, and the duration time of the sterilization effect is short.
Disclosure of Invention
In order to improve the long-term effectiveness of the sterilization effect of the medical non-woven fabric, the application provides the spun-bonded non-woven fabric, the preparation method of the spun-bonded non-woven fabric and the medical non-woven fabric.
In a first aspect, the present application provides a spunbonded nonwoven fabric, which adopts the following technical scheme:
a spun-bonded non-woven fabric is provided,
the feed comprises the following raw materials in parts by weight: 90-110 parts of polypropylene, 20-30 parts of low-density polyethylene, 1-3 parts of antibacterial functional powder and 1-2 parts of filler powder;
the antibacterial functional powder is prepared from mesoporous zeolite composite nano silver ions;
the preparation method of the antibacterial functional powder comprises the following steps:
dissolving silver nitrate and beta-cyclodextrin in water to prepare solution A;
dissolving sodium hydroxide and beta-cyclodextrin in water to prepare a solution B;
dissolving beta-cyclodextrin in water, then dropwise adding the solution A and the solution B, adding mesoporous zeolite after dropwise adding is completed, reacting for 24-26 h, carrying out light-shielding treatment, and then filtering, washing and drying to obtain the antibacterial functional powder.
The mesoporous zeolite is a crystalline zeolite containing rich mesopores, so that the excellent acidity and hydrothermal stability of the zeolite material are reserved, and the adsorption and diffusion properties of the mesoporous zeolite material to macromolecules are improved due to the introduction of the mesopores. By adopting the technical scheme, the mesoporous zeolite is used for adsorbing the nano silver ions to prepare the antibacterial powder, the nano silver ions have good antibacterial activity, and the nano silver ions are loaded on the mesoporous zeolite, so that the dispersibility of the nano silver ions in a non-woven fabric matrix material can be improved, and the mesoporous zeolite can promote the antibacterial action of the silver ions; the beta-cyclodextrin can assist the mesoporous zeolite to absorb the nano silver ions, and the beta-cyclodextrin also has a certain wrapping effect to improve the adsorption effect of the mesoporous zeolite on the silver ions and reduce the probability of the silver ions falling off from the mesoporous zeolite. Therefore, the spunbonded nonwoven outside the medical nonwoven can filter and inhibit more bacteria, so that the bacteria entering between the melt-blown nonwoven and the spunbonded nonwoven are reduced, the static electricity release efficiency of the melt-blown nonwoven is effectively reduced, the static electricity of the melt-blown nonwoven is continuously released for a long time, and the antibacterial action time of the medical nonwoven is effectively prolonged.
Antibacterial function powder improves the antibacterial property of spunbonded nonwoven, and the addition of filler powder can cooperate with antibacterial function powder, improve the roughness on spunbonded nonwoven surface, thereby improve the adsorption capacity of spunbonded nonwoven to the bacterium, improve the interception and the filter capacity of spunbonded nonwoven to the bacterium, reduce and enter into the bacterium between meltblown nonwoven and the spunbonded nonwoven, effectively reduce the electrostatic discharge efficiency of meltblown nonwoven, make the static of meltblown nonwoven continuously release for a long time, effectively prolong the antibacterial action time of medical nonwoven.
Preferably, the weight ratio of the silver nitrate to the sodium hydroxide is 4:1.
preferably, the filler powder is prepared from the following components in a weight ratio of 1: (1.86-3) titanium dioxide and carbon black.
By adopting the technical scheme, the carbon black is added into the spun-bonded non-woven fabric raw material as a reinforcing material, so that the strength of the spun-bonded non-woven fabric can be effectively improved; the addition of the titanium dioxide can improve the skin feel of the spunbonded non-woven fabric, and the titanium dioxide and the carbon black are compounded to be used as filler powder, so that the comprehensive performance of the spunbonded non-woven fabric is improved.
In a second aspect, the present application provides a method for preparing a spunbonded nonwoven fabric, which adopts the following technical scheme:
a method for preparing spun-bonded non-woven fabric comprises the following steps:
s1, mixing, extruding and granulating the antibacterial functional powder and 5 weight percent of polypropylene in the raw materials to obtain antibacterial master batches;
and S2, mixing the antibacterial master batch obtained in the S1 with the rest polypropylene and other raw materials to obtain a uniformly mixed granular product, performing melt extrusion on the granular product, and then spinning and air-flow drawing to form a web to obtain the spunbonded non-woven fabric.
By adopting the technical scheme, part of the polypropylene and the antibacterial functional powder are granulated to obtain the antibacterial master batch, and then the antibacterial master batch and the rest of the polypropylene are melted and granulated, so that the dispersion uniformity of the antibacterial functional powder in a polypropylene system can be improved, and the antibacterial effect of the spun-bonded non-woven fabric can be improved. The preparation method is simple and easy to operate, has no special requirements on production equipment, and is suitable for industrial production.
Preferably, the method further comprises a post-treatment step, wherein the post-treatment step comprises the following steps: beta-acryloxypropionic acid and benzophenone are used for grafting the spun-bonded non-woven fabric under the irradiation of ultraviolet light.
Preferably, 1) cleaning the spunbonded non-woven fabric, soaking the spunbonded non-woven fabric in benzophenone solution, and then drying the spunbonded non-woven fabric in a dark place to obtain initiated spunbonded non-woven fabric;
2) Dropwise adding beta-acryloxy propionic acid water solution to the initiated spun-bonded non-woven fabric obtained in the step 1), then grafting under the irradiation of ultraviolet light, and cleaning and drying after the reaction is finished.
By adopting the technical scheme, under the irradiation of ultraviolet light, benzophenone is excited into a singlet state and then converted into a triplet state, hydrogen on the surfaces of the polypropylene non-woven fabric and beta-acryloxy propionic acid is extracted by the benzophenone triplet state to form free radicals, a monomer is initiated to graft and copolymerize on the surface of the polypropylene non-woven fabric to form a graft chain, a copolymer lengthening chain is formed, a copolymer is finally formed and grafted on the surface of the spun-bonded non-woven fabric, the surface of the grafted spun-bonded non-woven fabric becomes rough and is obviously coated by a slurry sample substance, and an active group is successfully introduced into the surface of the spun-bonded non-woven fabric. Not only improved the roughness on spunbonded nonwoven surface, improve the area of contact of bacterium and spunbonded nonwoven, the active group can also improve the adsorption effect to the bacterium, thereby reduce and enter into the bacterium between melt-blown nonwoven and the spunbonded nonwoven, effectively reduce the electrostatic discharge efficiency of melt-blown nonwoven, make the static of melt-blown nonwoven last long-term release, effectively prolong the antibiotic active time of medical non-woven, improve antibiotic long-term.
In a third aspect, the present application provides a medical nonwoven fabric, which adopts the following technical scheme:
a medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric in sequence; the spun-bonded non-woven fabric is any one of the spun-bonded non-woven fabrics.
In summary, the present application has the following beneficial effects:
1. as the medical non-woven fabric is prepared from the spun-bonded non-woven fabric prepared from the antibacterial functional powder by adsorbing the nano silver ions by using the mesoporous zeolite, the initial bacteriostasis rate of the obtained medical non-woven fabric can reach 94.3-98.9%; the long-acting antibacterial rate can reach 90.3-97.1%, and the prepared medical non-woven fabric has a good antibacterial effect, is strong in antibacterial durability and can inhibit bacteria for a long time.
2. The method of the application, carry out grafting treatment to the spunbonded nonwoven fabric under ultraviolet irradiation through adopting beta-acryloxy propionic acid and benzophenone, the roughness on spunbonded nonwoven fabric surface has been improved, the area of contact of bacterium and spunbonded nonwoven fabric is improved, the adsorption effect to the bacterium is improved, further reduce and enter into the bacterium between meltblown nonwoven fabric and the spunbonded nonwoven fabric, effectively reduce the electrostatic discharge efficiency of meltblown nonwoven fabric, make the static of meltblown nonwoven fabric release for a long time continuously, effectively prolong the antibacterial action time of medical nonwoven fabric, improve the long-term of antibiosis.
Detailed Description
The present application will be described in further detail with reference to examples.
Raw materials
The embodiments of the present application can be obtained through the market:
polypropylene, grade Z30S;
low density polyethylene, grade 2012TN26;
mesoporous zeolite, mesoporous MFI zeolite;
beta-cyclodextrin, analytically pure;
benzophenone, analytically pure;
beta-acryloxypropionic acid, analytically pure;
meltblown nonwovens are manufactured by this company.
Examples
Example 1
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
1) 40g of AgNO 3 And 30 g beta-cyclodextrin are dissolved in 10L water to prepare solution A;
2) Dissolving 10g of NaOH and 50 g beta-cyclodextrin in 5L of water to prepare a solution B;
3) Dissolving 200g of beta-cyclodextrin in 15L of water, sequentially dropwise adding the solution A and the solution B, stirring and mixing at 25 ℃, stopping stirring after dropwise adding, adding 60g of mesoporous zeolite, reacting for 24 hours, performing light-shielding treatment, filtering, washing the filtered solid matter with water for 3 times, and drying at 60 ℃ to obtain antibacterial functional powder;
s2. Preparation of spun-bonded non-woven fabric
The spun-bonded non-woven fabric comprises the following raw materials: 90kg of polypropylene, 30kg of low-density polyethylene, 3kg of the antibacterial functional powder obtained in the step S1 and 1kg of titanium dioxide filler powder; the preparation method comprises the following steps:
1) Mixing the antibacterial functional powder with 5% of polypropylene, namely 4.5kg of polypropylene, melting, extruding and granulating to obtain antibacterial master batch; wherein the melt extrusion conditions are as follows: the processing temperature of the twin-screw extrusion is 180 ℃, the rotating speed of a main screw is 300 r/min, and the rotating speed of a feeding screw is 20 r/min;
2) Mixing the antibacterial master batch obtained in the step 1) with the rest polypropylene and other raw materials to obtain a uniformly mixed granular product, performing melt extrusion on the granular product, and then spinning and air-jet drawing to form a net to obtain a spunbonded non-woven fabric; wherein the melt extrusion conditions are as follows: the processing temperature of the twin-screw extrusion is 190 ℃, the rotating speed of the main screw is 300 r/min, and the rotating speed of the feeding screw is 20 r/min; the spinning temperature is 225 ℃;
s3, preparation of medical non-woven fabric
Carrying out hot rolling and coiling according to the sequence of spun-bonded non-woven fabric-melt blown non-woven fabric-spun bonded non-woven fabric to obtain the medical non-woven fabric, wherein the rolling mill temperature is 145 ℃, the rolling mill uplift pressure is 144Bar, and the bending pressure is 70Bar (wherein the uplift pressure refers to the upward top pressure of the lower roller of the rolling mill, and the bending pressure is the bending extrusion pressure of the upper roller of the rolling mill); spunbond nonwoven fabric from example 1; wherein the spunbond nonwoven comes from step S2.
Example 2
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
The same as example 1;
s2. Preparation of spun-bonded non-woven fabric
The spun-bonded non-woven fabric comprises the following raw materials: 100kg of polypropylene, 25kg of low-density polyethylene, 2kg of the antibacterial functional powder obtained in the step S1 and 2kg of titanium dioxide filler powder; the preparation method comprises the following steps:
the same as example 1;
s3, preparation of medical non-woven fabric
The same as in example 1.
Example 3
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
The same as example 1;
s2. Preparation of spun-bonded non-woven fabric
The spun-bonded non-woven fabric comprises the following raw materials: 110kg of polypropylene, 20kg of low density polyethylene, 1kg of the antibacterial functional powder obtained in the step S1 and 2kg of carbon black filler powder; the preparation method comprises the following steps:
the same as example 1;
s3, preparation of medical non-woven fabric
The same as in example 1.
Example 4
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
The same as example 1;
s2. Preparation of spun-bonded non-woven fabric
The spun-bonded non-woven fabric comprises the following raw materials: 100kg of polypropylene, 25kg of low-density polyethylene, 2kg of the antibacterial functional powder obtained in the step S1, 0.7kg of titanium dioxide and 1.3kg of carbon black filler powder; the preparation method comprises the following steps:
the same as example 1;
s3, preparation of medical non-woven fabric
The same as in example 1.
Example 5
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
The same as example 1;
s2. Preparation of spun-bonded non-woven fabric
The spun-bonded non-woven fabric comprises the following raw materials: 100kg of polypropylene, 25kg of low density polyethylene, 2kg of the antibacterial functional powder obtained in the step S1, 0.5kg of titanium dioxide and 1.5kg of carbon black filler powder; the preparation method comprises the following steps:
the same as example 1;
s3, preparation of medical non-woven fabric
The same as in example 1.
Example 6
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
The same as example 1;
s2. Preparation of spun-bonded non-woven fabric
The spun-bonded non-woven fabric comprises the following raw materials: 100kg of polypropylene, 25kg of low-density polyethylene, 2kg of the antibacterial functional powder obtained in the step S1, 1.5kg of titanium dioxide and 0.5kg of carbon black filler powder; the preparation method comprises the following steps:
the same as example 1;
s3, preparation of medical non-woven fabric
The same as in example 1.
Example 7
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
The same as example 5;
s2. Preparation of spun-bonded non-woven fabric
The spun-bonded non-woven fabric comprises the following raw materials: the same as example 5; the preparation method comprises the following steps:
1) The same as example 5;
2) The same as example 5;
3) Graft treatment
Cleaning the spun-bonded non-woven fabric obtained in the step 2), soaking the spun-bonded non-woven fabric in a benzophenone-ethanol solution with the volume fraction of 1%, soaking for 30min, and then drying the spun-bonded non-woven fabric at 25 ℃ in a dark place to obtain the treated spun-bonded non-woven fabric;
dropwise adding 8% by volume of beta-acryloxypropionic acid aqueous solution onto the treated spun-bonded non-woven fabric, grafting under the irradiation of ultraviolet light, reacting for 60min, ultrasonically cleaning with absolute ethyl alcohol and deionized water for 10 min, and drying in an oven at 37 ℃;
s3, preparation of medical non-woven fabric
The same as in example 5.
Comparative example
Comparative example 1
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
The antibacterial functional powder is nano silver;
s2. Preparation of spun-bonded non-woven fabric
The same as example 1;
s3, preparation of medical non-woven fabric
The same as in example 1.
Comparative example 2
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
1) 40g of AgNO 3 And 30 g beta-cyclodextrin are dissolved in 10L water to prepare solution A;
2) Dissolving 10g of NaOH and 50 g beta-cyclodextrin in 5L of water to prepare a solution B;
3) Dissolving 200g of beta-cyclodextrin in 15L of water, sequentially dropwise adding the solution A and the solution B, stirring and mixing at 25 ℃, stopping stirring after dropwise adding, adding 60g of 4A zeolite, reacting for 24 hours, carrying out light-resistant treatment, filtering, washing solid matters obtained by filtering with water for 3 times, and drying at 60 ℃ to obtain antibacterial functional powder;
s2. Preparation of spun-bonded non-woven fabric
The same as example 1;
s3, preparation of medical non-woven fabric
The same as in example 1.
Comparative example 3
Unlike example 1, comparative example 3 does not contain an antibacterial functional powder.
Comparative example 4
A medical non-woven fabric comprises a spun-bonded non-woven fabric, a melt-blown non-woven fabric and a spun-bonded non-woven fabric which are arranged in sequence, and the preparation method comprises the following steps:
s1, preparation of antibacterial functional powder
1) 40g of AgNO 3 Dissolving in 10L water to prepare solution A;
2) Dissolving 10g of NaOH in 5L of water to prepare a solution B;
3) Dropwise adding the solution A and the solution B into 15L of water in sequence, stirring and mixing at 25 ℃, stopping stirring after the dropwise adding is finished, adding 60g of mesoporous zeolite, reacting for 24 hours, carrying out light-shielding treatment, filtering, washing solid matters obtained by filtering for 3 times by using water, and drying at 60 ℃ to obtain antibacterial functional powder;
s2. Preparation of spun-bonded non-woven fabric
The same as example 5;
s3, preparation of medical non-woven fabric
The same as in example 5.
Performance test
Detection method/test method
Reference is made to GB/T20944.2-2007 evaluation of antibacterial properties of textiles section 2: absorption method for the medical nonwoven fabrics obtained in the examples and comparative examples, the antibacterial performance was tested; the overnight-cultured broth was diluted to a concentration of 2X 10 6 CFU/mL, taking 100 mu L of test bacterial liquid to disperse on a sample, culturing 24h at 37 ℃, adding 1mL PBS buffer solution, ultrasonically eluting for 15 min, taking 1mL after gradient dilution, coating on a solid culture medium, culturing 24h at 37 ℃, counting and calculating the bacteriostatic rate, and marking as the initial bacteriostatic rate, see Table 1;
the overnight-cultured broth was diluted to a concentration of 2X 10 6 CFU/mL CFU/mL, 100 μ L of test bacterial liquid is taken and dispersed on a sample, 72 h is cultured at 37 ℃, then 100 μ L of test bacterial liquid is taken and dispersed on the sample again, 24h is cultured at 37 ℃, 1mL PBS buffer solution is added, ultrasonic elution is carried out for 15 min, 1mL is taken and coated on a solid culture medium after gradient dilution, 24h is cultured at 37 ℃, and the antibacterial rate is counted and calculated and is recorded as the long-acting antibacterial rate, which is shown in Table 1.
TABLE 1 Performance test results
Figure 407589DEST_PATH_IMAGE001
By combining examples 1-7 and comparative examples 1-4, and table 1, it can be seen that the initial bacteriostatic rate in examples 1-7 is higher than that in comparative examples 1-3, and the long-acting bacteriostatic rate is higher than that in comparative examples 1-4, and although the initial bacteriostatic rate is high in comparative example 4, the long-acting bacteriostatic rate is low, which indicates that the medical non-woven fabric prepared by the application has a good antibacterial effect, strong antibacterial durability and can inhibit bacteria for a long time.
Combining example 1 with comparative examples 1-2, and table 1, it can be seen that the nanosilver ions in comparative example 1 were not treated and the zeolite type in comparative example 2 was different from example 1; the bacteriostatic rates in comparative examples 1-2 were all decreased compared to example 1, but the initial bacteriostatic rate in comparative example 1 was higher than that in comparative example 2, but the long-lasting bacteriostatic rate was significantly decreased, which is probably because the silver ions in comparative example 1 were completely released at the initial stage, and the antibacterial effect at the later stage was decreased; in comparative example 3, the initial bacteriostatic rate and the long-acting bacteriostatic rate of the antibacterial material are both reduced, especially the long-acting bacteriostatic rate is greatly reduced, which may be caused by that the filtration rate and the antibacterial capacity of the outer layer spunbonded nonwoven fabric are weaker, more bacteria enter the melt-blown nonwoven fabric layer, so that the electrostatic release frequency of the melt-blown nonwoven fabric is higher, the electrostatic adsorption capacity is continuously reduced along with the continuous release of static, and the duration time of the sterilization effect is short; after the antibacterial functional powder is added, the spun-bonded non-woven fabric on the outer side can be filtered and can inhibit more bacteria, so that the bacteria entering between the melt-blown non-woven fabric and the spun-bonded non-woven fabric are reduced, the static electricity release efficiency of the melt-blown non-woven fabric is effectively reduced, the static electricity of the melt-blown non-woven fabric is continuously released for a long time, and the antibacterial action time of the medical non-woven fabric is effectively prolonged.
By combining the example 5 and the comparative example 4 and combining the table 1, it can be seen that the antibacterial functional powder in the comparative example 4 does not contain beta-cyclodextrin during preparation, compared with the example 5, the initial antibacterial rate of the medical non-woven fabric in the comparative example 4 is not significantly reduced, but the long-acting antibacterial rate is significantly reduced, which may be because the beta-cyclodextrin can assist the mesoporous zeolite to absorb the nano silver ions, and the beta-cyclodextrin has a certain wrapping effect to improve the adsorption effect of the mesoporous zeolite on the silver ions, reduce the probability of the silver ions falling off from the mesoporous zeolite, and ensure the long-term antibacterial effect of the antibacterial functional powder.
Combining the embodiment 5 and the embodiment 7, and combining the table 1, it can be seen that the initial bacteriostatic rate and the long-acting bacteriostatic rate of the nonwoven fabric for traditional Chinese medicine in the embodiment 7 are both increased, which may be because the active groups are successfully introduced on the surface of the spunbond nonwoven fabric by the grafting treatment, not only the roughness of the surface of the spunbond nonwoven fabric is improved, but also the contact area between bacteria and the spunbond nonwoven fabric is improved, and the active groups can also improve the adsorption effect on the bacteria, thereby reducing the bacteria entering between the meltblown nonwoven fabric and the spunbond nonwoven fabric, effectively reducing the electrostatic release efficiency of the meltblown nonwoven fabric, enabling the static electricity of the meltblown nonwoven fabric to be continuously released for a long time, effectively prolonging the antibacterial action time of the medical nonwoven fabric, and improving the long-acting property of the bacteria.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (7)

1. The spun-bonded non-woven fabric is characterized by comprising the following raw materials in parts by weight: 90-110 parts of polypropylene, 20-30 parts of low-density polyethylene, 1-3 parts of antibacterial functional powder and 1-2 parts of filler powder;
the antibacterial functional powder is prepared by compounding mesoporous zeolite with nano silver ions;
the preparation method of the antibacterial functional powder comprises the following steps:
dissolving silver nitrate and beta-cyclodextrin in water to prepare solution A;
dissolving sodium hydroxide and beta-cyclodextrin in water to prepare a solution B;
dissolving beta-cyclodextrin in water, then dropwise adding the solution A and the solution B, adding mesoporous zeolite after dropwise adding is completed, reacting for 24-26 h, carrying out light-shielding treatment, and then filtering, washing and drying to obtain the antibacterial functional powder.
2. A spun-bonded nonwoven fabric according to claim 1, characterized in that: the weight ratio of the silver nitrate to the sodium hydroxide is 4:1.
3. a spunbond nonwoven fabric according to claim 1, characterized in that: the filler powder is prepared from the following components in percentage by weight of 1: (1.86-3) titanium dioxide and carbon black.
4. A method of producing a spunbonded nonwoven fabric according to any one of claims 1 to 3, characterized in that it comprises the following steps:
s1, mixing, extruding and granulating the antibacterial functional powder and 5 wt% of polypropylene in the raw materials to obtain antibacterial master batches;
and S2, mixing the antibacterial master batch obtained in the S1 with the rest polypropylene and other raw materials to obtain a uniformly mixed granular product, performing melt extrusion on the granular product, and then spinning and air-flow drawing to form a web to obtain the spunbonded non-woven fabric.
5. A method of making a spunbonded nonwoven fabric according to claim 4, characterized in that: the method also comprises a post-treatment step, wherein the post-treatment step comprises the following steps: beta-acryloxypropionic acid and benzophenone are used for grafting treatment on the spun-bonded non-woven fabric under the irradiation of ultraviolet light.
6. A method of making a spunbonded nonwoven fabric according to claim 5, characterized in that: the post-processing method comprises the following steps:
1) Cleaning the spunbonded non-woven fabric, soaking the spunbonded non-woven fabric in benzophenone solution, and then drying the spunbonded non-woven fabric in a dark place to obtain initiated spunbonded non-woven fabric;
2) Dripping beta-acryloxypropionic acid water solution on the initiated spun-bonded non-woven fabric obtained in the step 1), then grafting under the irradiation of ultraviolet light, and cleaning and drying after the reaction is finished.
7. The utility model provides a medical non-woven fabrics, its is including the spunbonded nonwoven that sets gradually, melt-blown non-woven fabrics, spunbonded nonwoven, its characterized in that: the spunbonded nonwoven fabric is the spunbonded nonwoven fabric according to any one of claims 1 to 5.
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