CN113652028A - Disposable protective clothing and preparation method thereof - Google Patents
Disposable protective clothing and preparation method thereof Download PDFInfo
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- CN113652028A CN113652028A CN202110945688.0A CN202110945688A CN113652028A CN 113652028 A CN113652028 A CN 113652028A CN 202110945688 A CN202110945688 A CN 202110945688A CN 113652028 A CN113652028 A CN 113652028A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/12—Surgeons' or patients' gowns or dresses
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/08—Heat resistant; Fire retardant
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/24—Resistant to mechanical stress, e.g. pierce-proof
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/30—Antimicrobial, e.g. antibacterial
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2400/00—Functions or special features of garments
- A41D2400/52—Disposable
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2500/00—Materials for garments
- A41D2500/50—Synthetic resins or rubbers
- A41D2500/52—Synthetic resins or rubbers in sheet form
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2600/00—Uses of garments specially adapted for specific purposes
- A41D2600/20—Uses of garments specially adapted for specific purposes for working activities
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The application relates to the technical field of protective clothing, and particularly discloses disposable protective clothing and a preparation method thereof, wherein the disposable protective clothing is prepared from the following raw materials in parts by weight: 45-55 parts of homopolymerized polypropylene, 15-23 parts of block polypropylene, 6-14 parts of organosilane coupling agent, 14-24 parts of glass fiber, 0.6-1 part of composite antibacterial agent and 4-8 parts of nano fluorine-free water repellent agent. The antibacterial rate of staphylococcus aureus, the antibacterial rate of escherichia coli, the antibacterial rate of candida albicans and the water impermeability of the disposable protective clothing can respectively reach 99.5%, 96.7%, 98.5% and 2.95kPa to the maximum, the disposable protective clothing has high surface moisture resistance, and the antibacterial and barrier properties of the disposable protective clothing are improved.
Description
Technical Field
The application relates to the technical field of protective clothing, in particular to disposable protective clothing and a preparation method thereof.
Background
Protective clothing is protective clothing used by medical staff and people entering specific medical and health areas, and has the functions of providing barrier protection for blood, body fluid, secretion, bacteria, viruses, particles in air and the like of infectious patients and ensuring that the staff are prevented from being infected. The disposable protective clothing is more convenient and more favorable for blocking and protecting toxic and harmful substances.
In the related art, the protective clothing includes a protective layer including a PET non-woven fabric layer and an aramid fiber woven layer, which are stacked. The gaps between the PET non-woven fabric layer and the aramid fiber woven layer are provided with epoxy resin and cellulose molecular chains which penetrate through the gaps so as to connect the PET non-woven fabric layer with the aramid fiber woven layer, and the PET non-woven fabric layer and the aramid fiber woven layer have the advantages of light weight, high strength and good heat insulation. However, the protective clothing is simple in material and structure, liquid is easy to penetrate and permeate the surface of the internal clothing, bacteria are easy to adsorb on the surface of the protective clothing, secondary infection is easy to cause, so that the performances of resisting bacteria and blocking liquid toxic substances of the protective clothing are weaker, and sufficient safety protection cannot be provided for a user.
Disclosure of Invention
In order to improve the antibacterial and barrier properties of protective clothing, the application provides disposable protective clothing and a preparation method thereof.
In a first aspect, the present application provides a disposable protective garment, which employs the following technical scheme:
a disposable protective garment and a preparation method thereof are disclosed, which is prepared from the following raw materials in parts by weight: 45-55 parts of homopolymerized polypropylene, 15-23 parts of block polypropylene, 6-14 parts of organosilane coupling agent, 14-24 parts of glass fiber, 0.6-1 part of composite antibacterial agent and 4-8 parts of nano fluorine-free water repellent agent.
By adopting the technical scheme, the homo-polypropylene and the block polypropylene are thermoplastic synthetic resin with excellent performance, are thermoplastic light general-purpose plastics, and have chemical resistance, heat resistance, high-strength mechanical properties, good high-wear-resistance processing performance and the like. The tensile yield strength, transparency and rigidity of the homopolymerized polypropylene are higher than those of the block polypropylene, the impact strength and low-temperature toughness of the block polypropylene are higher than those of the homopolymerized polypropylene, and the tensile yield strength, transparency, rigidity, impact strength and low-temperature toughness of the disposable protective clothing can be improved by the synergistic effect of the homopolymerized polypropylene and the block polypropylene. However, the macromolecular structures of the homo-polypropylene and the block polypropylene do not contain hydrophilic groups, the crystallinity is high, the cross section of the fiber is circular, the structure is compact, micropores and gaps are lacked, and the hydrophilicity is poor. Therefore, the glass fiber is subjected to oleophylic modification, so that the dispersibility of the glass fiber added into the homo-polypropylene and the block polypropylene is improved, and the mechanical strength, the heat resistance and the chemical corrosion resistance of the disposable protective clothing are improved. The organosilane coupling agent can form a good interface between the glass fiber and the polypropylene, and the dimensional stability of the chemical protective clothing is improved. The addition of the composite antibacterial agent greatly improves the antibacterial performance of the surface of the disposable protective clothing and inhibits the spread of viruses and bacteria. The addition of the nano fluorine-free water repellent enables the fabric of the disposable protective clothing to have a water repellent effect, prevents toxic and harmful liquid from permeating the protective clothing, can avoid the harm of infected bacteria and the like to a user as much as possible, and improves the barrier property of the disposable protective clothing.
Preferably, the method comprises the following steps: the composition is prepared from the following raw materials in parts by weight: 47-52 parts of homopolymerized polypropylene, 17-21 parts of block polypropylene, 8-12 parts of organosilane coupling agent, 16.5-21.5 parts of glass fiber, 0.7-0.9 part of composite antibacterial agent and 5-7 parts of nano fluorine-free water repellent agent.
Preferably, the method comprises the following steps: the composite antibacterial agent is prepared from the following raw materials in parts by weight: 2-5 parts of nano metal ion antibacterial agent and 0.5-1.2 parts of nano titanium dioxide.
By adopting the technical scheme, the nano metal antibacterial agent and the nano titanium dioxide can perform the functions of bacteriostasis and sterilization by destroying the protein of bacteria or destroying and modifying the tissue structure of bacteria and viruses, so that the disposable protective clothing has antibacterial performance. The nanometer titanium dioxide stimulates the chain reaction to decompose bacteria, thereby effectively killing harmful bacteria such as escherichia coli and yellow glucose bacteria and preventing the infection of a user of the protective clothing.
Preferably, the method comprises the following steps: the nano metal ion antibacterial agent comprises 1-3 parts of nano silver ion antibacterial agent and 1-2 parts of nano copper ion antibacterial agent.
By adopting the technical scheme, the nano silver ion antibacterial agent utilizes the contact reaction of silver ions to cause the common components of microorganisms to be damaged or generate functional disorder. When the silver ions reach the microbial cell membrane, the silver ions are firmly adsorbed by the microbial cell membrane due to the negative charge of the microbial cell membrane and the coulomb attraction, and the silver ions penetrate through the cell wall and enter the cell, so that the protein is solidified, the activity of cell synthetase is damaged, and the cell loses the division and proliferation capacity and dies, thereby leading the disposable protective clothing to achieve the antibacterial performance. The nano copper ion antibacterial agent utilizes the direct interaction between the surface of copper ions and the bacterial outer membrane to break the cell outer membrane, so that the cells lose necessary nutrient substances and water to cause atrophy, and simultaneously, the excessive copper in the bacterial cells is combined with enzymes metabolized by the cells to lose the activity of the bacteria, thereby finally improving the antibacterial effect of the disposable protective clothing. The antibacterial agent has strong antibacterial performance on escherichia coli, staphylococcus aureus and candida albicans, and the nano silver ion antibacterial agent and the nano copper ion antibacterial agent have no stimulation to skin and no toxic reaction, so that the antibacterial performance of the disposable protective clothing is improved, and the human body is not damaged.
Preferably, the method comprises the following steps: the nano metal ion antibacterial agent is obtained by carrying out oleophylic modification treatment on polyvinylpyrrolidone, and the nano titanium dioxide is obtained by carrying out oleophylic modification treatment on polyvinyl alcohol.
By adopting the technical scheme, the polyvinylpyrrolidone molecules are coordinated with the surface atoms of the nano silver ions and the nano copper ions through nitrogen and oxygen atoms, and the carbon-hydrogen bond long chains are left to extend to the periphery so as to prevent the nano silver ions and the nano copper ions from mutually agglomerating, so that the lipophilicity of the nano silver ion antibacterial agent and the nano copper ion antibacterial agent is improved, and the typing in the whole system is more uniform. The polyvinyl alcohol contains a large amount of strong polar hydroxyl groups, chelate bonds are formed between the groups and metal ions in water solubility, and the groups are tightly coated around the metal ions to form a limited structure with a polyvinyl alcohol chain limited shape, so that the lipophilicity of the nano titanium dioxide is improved, and the nano titanium dioxide is uniformly dispersed in a system.
Preferably, the method comprises the following steps: the weight ratio of the polyvinylpyrrolidone to the nano metal antibacterial agent is 1: (1-3); the weight ratio of the polyvinyl alcohol to the nano titanium dioxide is 1: (1-2).
Preferably, the method comprises the following steps: the organic silane coupling agent is vinyl trimethoxy silane.
By adopting the technical scheme, the organosilane coupling agent adopts vinyl trimethoxy silane, so that the infiltration and the caking property of the homo-polypropylene and the block polypropylene and the glass fiber can be improved, and the mechanical strength and the heat resistance of the disposable protective clothing can be effectively improved.
Preferably, the method comprises the following steps: the weight ratio of the vinyl trimethoxy silane to the glass fiber is 1: (2-3).
In a second aspect, the present application provides a method for preparing any one of the above disposable protective garments, which is specifically realized by the following technical scheme:
a preparation method of disposable protective clothing comprises the following operation steps:
firstly, uniformly mixing homo-polypropylene and block polypropylene to obtain a mixture A;
uniformly mixing the mixture A with an organosilane coupling agent and glass fibers to obtain a mixture B;
adding the oleophylic modified composite antibacterial agent into the mixture B, and uniformly mixing to obtain a mixture C;
and uniformly mixing the mixture C and the nano fluorine-free water repellent agent, melting at the temperature of 185-195 ℃, stretching to form a film to form a protective clothing fabric, and finally cutting and sewing the protective clothing fabric to prepare the disposable protective clothing.
By adopting the technical scheme, the addition of the organosilane coupling agent and the glass fiber can effectively improve the mechanical strength of the disposable protective clothing and the tensile resistance of the disposable protective clothing, the lipophilic modification of the composite antibacterial agent enables the composite antibacterial agent to be better dispersed in a system, the nano fluorine-free water repellent agent enables the barrier property of the disposable protective clothing to be improved, and the antibacterial and barrier properties of the protective clothing are improved through the mutual matching of the raw materials of the disposable protective clothing.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) the antibacterial rate of staphylococcus aureus, the antibacterial rate of escherichia coli, the antibacterial rate of candida albicans and the water impermeability of the protective garment of the disposable protective garment can respectively reach 99.5%, 96.7%, 98.5% and 2.95kPa to the maximum, and the surface moisture resistance is 5-grade.
(2) The disposable protective clothing has excellent water-washing-resistant antibacterial property, still has excellent antibacterial action on staphylococcus aureus, escherichia coli and candida albicans after being washed for 20 times, has good water seepage resistance and surface moisture resistance, and has strong barrier action on toxic and harmful liquid.
Detailed Description
The present application will be described in further detail with reference to specific examples.
The following raw materials in the application are all commercially available products, and specifically: the homo-polypropylene is selected from the plastication Limited of Yao City; the block polypropylene is selected from the New Plastic Material, Inc., Chaudong ultra Wang; the vinyl trimethoxy silane is selected from Jiangsu Runfeng synthetic science and technology limited, the content of effective substances is 99%, and the model is 171; the glass fiber is selected from Jiangyin Wanqian Chemicals GmbH; the nano silver ion antibacterial agent is selected from Foshan science and technology company with an effective substance content of 99% and a model of KEPUYIN-J46; the nano copper ion antibacterial agent is selected from Guangzhou Yanrui chemical company, and has a particle size of 20 nm; the nanometer titanium dioxide is selected from Shanghai Huizi sub-nanometer new material company, and the particle size is 5 nm; the polyvinylpyrrolidone is selected from Shandonghao Shunhua chemical industry Co., Ltd, and has an effective substance content of 99%; the polyvinyl alcohol is selected from Nanchang Yi positive chemical industry Co., Ltd, and the content of the effective substance is 93%.
The following are examples of the preparation of the complex antimicrobial agent in the present application:
preparation example 1
The specific preparation operation of the composite antibacterial agent in the application is as follows:
1. uniformly mixing the nano silver ion antibacterial agent and the nano copper ion antibacterial agent according to the mixing amount in the table 1, and adding polyvinylpyrrolidone after mixing to obtain oleophylic modified nano silver ion antibacterial agent and nano copper ion antibacterial agent;
mixing water and polyvinyl alcohol uniformly, gradually adding nano titanium dioxide, stirring until no precipitate exists, filtering, washing with water and ethanol respectively, and drying at 60 deg.C for 30min to obtain oleophylic modified nano titanium dioxide.
Preparation examples 2 to 5
The composite antibacterial agents of preparation examples 2-5 were prepared in the same manner as in preparation example 1, except that the raw materials were different in composition, as shown in Table 1.
TABLE 1 blending amounts (unit: g) of respective raw materials of the complex antibacterial agents of preparation examples 1 to 5
| Raw materials | Preparation example 1 | Preparation example 2 | Preparation example 3 | Preparation example 4 | Preparation example 5 |
| Nano silver ion antibacterial agent | 100 | 150 | 250 | 300 | 100 |
| Nano copper ion antibacterial agent | 100 | 125 | 175 | 200 | 100 |
| Nano titanium dioxide | 80 | 80 | 80 | 80 | 80 |
| Polyvinylpyrrolidone | 200 | 137.5 | 141.6 | 125 | 400 |
| Polyvinyl alcohol | 50 | 50 | 50 | 50 | 50 |
| Water (W) | 110 | 120 | 130 | 130 | 110 |
Preparation examples 6 to 10
The composite antibacterial agents of preparation examples 6 to 10 were prepared in the same manner as in preparation example 1, except that the raw materials were different in composition, as shown in Table 2.
TABLE 2 blending amounts (unit: g) of respective raw materials of the composite antibacterial agents of preparation examples 6 to 10
Example 1
A disposable protective garment is prepared by the following operation steps.
According to the mixing amount shown in the table 3, firstly, uniformly mixing the homo-polypropylene and the block polypropylene to obtain a mixture A;
uniformly mixing the mixture A with an organosilane coupling agent and glass fibers to obtain a mixture B;
adding the composite antibacterial agent which is not subjected to oleophylic modification into the mixture B, and uniformly mixing to obtain a mixture C;
and uniformly mixing the mixture C with the nano fluorine-free water repellent agent, melting at 190 ℃, stretching to form a film to form a protective clothing fabric, and finally cutting and sewing the protective clothing fabric to prepare the disposable protective clothing.
Example 2
The preparation method and the types of the raw materials of the disposable protective clothing in the embodiment 2 are completely the same as those of the disposable protective clothing in the embodiment 1, and the difference is that the raw materials are the composite antibacterial agent prepared in the embodiment 1, and the details are shown in the table 3.
Examples 3 to 6
The disposable protective garments of examples 3-6 were prepared in the same manner and using the same types of raw materials as in example 2, except that the amounts of the raw materials were different, as shown in table 3.
TABLE 3 blending amounts (unit: kg) of respective materials of the disposable protective clothing of examples 1 to 6
| Raw materials | Examples 1 to 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Homo-polypropylene | 45 | 47 | 49 | 52 | 55 |
| Block polypropylene | 15 | 17 | 19 | 21 | 23 |
| Vinyl trimethoxy silane | 6 | 8 | 10 | 12 | 14 |
| Glass fiber | 14 | 16.5 | 19 | 21.5 | 24 |
| Composite antibacterial agent | 0.6 | 0.7 | 0.8 | 0.9 | 1 |
| Nano fluorine-free water repellent agent | 4 | 5 | 6 | 7 | 8 |
Examples 7 to 11
The disposable protective garments of examples 7-11 were prepared in exactly the same manner and with the same types of raw materials as in example 4, except that the amounts of the raw materials were varied, as shown in Table 4.
TABLE 4 blending amounts (unit: kg) of respective materials of the disposable protective clothing of examples 7 to 11
Examples 12 to 20
The disposable protective clothing of examples 12 to 20 was prepared in the same manner as in example 9, except that the composite antibacterial agents prepared in preparation examples 2 to 10 were respectively selected as the composite antibacterial agents, and the remaining raw materials and the blending amounts were the same as in example 9.
Comparative example 1
The disposable protective garment of comparative example 1 was prepared exactly the same as example 2, except that: vinyl trimethoxy silane was not added to the raw materials, and the other raw materials and the amount of the added vinyl trimethoxy silane were the same as in example 1.
Comparative example 2
The disposable protective garment of comparative example 2 was prepared exactly the same as example 2 except that: the raw materials were not added with the composite antibacterial agent, and the other raw materials and the mixing amount were the same as in example 1.
Comparative example 3
The disposable protective garment of comparative example 3 was prepared exactly the same as example 2 except that: the raw materials are not added with the nano fluorine-free water repellent agent, and the other raw materials and the doping amount are the same as those in the example 1.
Comparative example 4
The disposable protective garment of comparative example 4 was prepared exactly the same as example 2 except that: the composite antibacterial agent in the raw materials is not added with the nano titanium dioxide, and the other raw materials and the mixing amount are the same as those in the embodiment 1.
Performance detection
Washing resistance and antibacterial property: the inhibition rates of the disposable protective clothing on staphylococcus aureus, escherichia coli and candida albicans after washing for 30 times by a washing method of a color fastness to washing tester are tested according to GB/T20944.3-2008 in examples 1-20 and comparative examples 1-4 respectively, and each group of samples is subjected to 3 repeated tests. The test results are shown in Table 5.
And (3) testing the water impermeability: examples 1 to 20 and comparative examples 1 to 4 were each subjected to a water-barrier test at a temperature of 27 ℃ under pressure applied to the surface of a protective garment at a pressure increase rate of 1.0kPa/min (10 cmH), with reference to GB/T4744-1997 hydrostatic test for measuring Water-barrier Property of textile fabrics2O/min). The test results are shown in Table 5.
Surface moisture resistance: examples 1 to 20 and comparative examples 1 to 4 were tested for surface moisture resistance according to the standard of GB/T4745-1997 textile Fabric surface moisture resistance test, under a standard atmospheric pressure; deionized water with a water temperature of 27 ℃ was used. And judging the test result according to the standard by 1-5 grades. Water pick-up grade: level 1-the drenched surface is fully wetted; level 2- -half the wetted surface, which usually refers to the sum of the wetted areas where the nubs are not connected; 3- -small area wetting where the oil on the surface is not connected; 4- -the surface is not wetted, but the surface is stained with small water drops; 5- -the showered surface was not wetted and there were no small water droplets on the surface, and the test results are shown in Table 5.
TABLE 5 Performance test results for different disposable protective garments
The detection results in Table 5 show that the bacteriostatic rates of Staphylococcus aureus, Escherichia coli, Candida albicans and water permeation resistance of the disposable protective clothing of examples 1-20 are all superior to those of the protective clothing of comparative examples 1-4, and the surface moisture resistance of the protective clothing of examples 1-20 is 5 grades, so that the protective clothing has good barrier property. Therefore, the disposable protective clothing has excellent antibacterial performance and barrier performance.
In examples 1-6, the bacteriostatic rate of staphylococcus aureus, the bacteriostatic rate of escherichia coli, the bacteriostatic rate of candida albicans, and the water impermeability of the disposable protective garment of example 3 were 97%, 95%, 96.5%, and 2.70kPa, respectively, which were higher than the bacteriostatic rate of staphylococcus aureus, the bacteriostatic rate of escherichia coli, the bacteriostatic rate of candida albicans, and the water impermeability of examples 1-2 and examples 4-5; the raw materials of the disposable protective clothing in the example 3 are more suitable in parts by weight, but the protective clothing in the example 1 has poorer antibacterial performance compared with the protective clothing in the examples 2 to 6, which shows that the lipophilic modification of the antibacterial mixture has great significance on the antibacterial performance of the protective clothing.
The performances of the disposable protective garments of examples 7-11 are all better than the performances of examples 1-6, and in examples 7-11, the staphylococcus aureus inhibition rate, escherichia coli inhibition rate, candida albicans inhibition rate and water impermeability of the disposable protective garment of example 9 are 98%, 96%, 97.5% and 2.80kPa respectively, which are higher than the staphylococcus aureus inhibition rate, escherichia coli inhibition rate, candida albicans inhibition rate and water impermeability of the disposable protective garments of examples 7-8 and examples 10-11, thus showing that the weight ratio of the composite antibacterial agent to the glass fiber in the raw materials of the disposable protective garments is 1:2.5, which is most suitable.
From the performance data of the disposable protective garments of examples 12 to 15, it is found that the bacteriostatic rate of staphylococcus aureus, the bacteriostatic rate of escherichia coli, the bacteriostatic rate of candida albicans and the water permeability resistance of the disposable protective garment of example 12 are respectively 99%, 96.3%, 98% and 2.85kPa, which are higher than the bacteriostatic rate of staphylococcus aureus, the bacteriostatic rate of escherichia coli, the bacteriostatic rate of candida albicans and the water permeability resistance of the disposable protective garment of examples 13 to 15, and the antibacterial effect is the best when the weight part ratio of the polyvinylpyrrolidone to the nano-metal antibacterial agent is 1:2 during the oleophylic modification of the composite antibacterial agent. In examples 16-20, the bacteriostatic rate of staphylococcus aureus, the bacteriostatic rate of escherichia coli, the bacteriostatic rate of candida albicans, and the water permeability resistance of the disposable protective clothing of example 17 were 99.5%, 98%, 98.5%, and 2.95kPa, respectively, and were all higher than the bacteriostatic rate of staphylococcus aureus, the bacteriostatic rate of escherichia coli, the bacteriostatic rate of candida albicans, and the water permeability resistance of the disposable protective clothing of examples 16 and 18-20, indicating that when the composite antibacterial agent was oleophylically modified, the antibacterial effect was the best when the weight ratio of the nano titanium dioxide to the polyvinyl alcohol was 1: 1.5.
In addition, the data of various indexes of comparative examples 1-20 and comparative examples 1-4 show that the added vinyltrimethoxysilane and the compound antibacterial agent are adopted in the raw materials, so that the antibacterial and barrier properties of the disposable protective clothing are obviously improved. The nano fluorine-free water repellent agent added into the raw materials of the disposable protective clothing also relatively improves the performance of the disposable protective clothing for blocking toxic and harmful liquid, and the oleophylic modification of the composite antibacterial agent also greatly improves the antibacterial performance of the disposable protective clothing. The disposable protective clothing meets the requirements of a user on the antibacterial and barrier properties of the protective clothing, and greatly reduces the probability of the user infecting harmful substances.
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 (9)
1. The disposable protective clothing is characterized by being prepared from the following raw materials in parts by weight: 45-55 parts of homopolymerized polypropylene, 15-23 parts of block polypropylene, 6-14 parts of organosilane coupling agent, 14-24 parts of glass fiber, 0.6-1 part of composite antibacterial agent and 4-8 parts of nano fluorine-free water repellent agent.
2. The disposable protective garment according to claim 1, characterized in that it is prepared from the following raw materials in parts by weight: 47-52 parts of homopolymerized polypropylene, 17-21 parts of block polypropylene, 8-12 parts of organosilane coupling agent, 16.5-21.5 parts of glass fiber, 0.7-0.9 part of composite antibacterial agent and 5-7 parts of nano fluorine-free water repellent agent.
3. The disposable protective garment according to claim 1, wherein the composite antimicrobial agent is prepared from the following raw materials in parts by weight: 2-5 parts of nano metal ion antibacterial agent and 0.5-1.2 parts of nano titanium dioxide.
4. The disposable protective garment according to claim 3, wherein: the nano metal ion antibacterial agent comprises 1-3 parts of nano silver ion antibacterial agent and 1-2 parts of nano copper ion antibacterial agent.
5. The disposable protective garment according to claim 4, wherein: the nano metal ion antibacterial agent is obtained by carrying out oleophylic modification treatment on polyvinylpyrrolidone, and the nano titanium dioxide is obtained by carrying out oleophylic modification treatment on polyvinyl alcohol.
6. The disposable protective garment according to claim 5, wherein: the weight ratio of the polyvinylpyrrolidone to the nano metal ion antibacterial agent is 1: (1-3); the weight ratio of the polyvinyl alcohol to the nano titanium dioxide is 1: (1-2).
7. The disposable protective garment according to claim 1, wherein: the organic silane coupling agent is vinyl trimethoxy silane.
8. The disposable protective garment according to claim 8, wherein: the weight ratio of the vinyl trimethoxy silane to the glass fiber is 1: (2-3).
9. A method for manufacturing disposable protective garments according to any of claims 1 to 9, characterized in that it comprises the following operative steps:
firstly, uniformly mixing homo-polypropylene and block polypropylene to obtain a mixture A;
uniformly mixing the mixture A with an organosilane coupling agent and glass fibers to obtain a mixture B;
adding the composite antibacterial agent into the mixture B, and uniformly mixing to obtain a mixture C;
and uniformly mixing the mixture C and the nano fluorine-free water repellent agent, melting at the temperature of 185-195 ℃, stretching to form a film to form a protective clothing fabric, and finally cutting and sewing the protective clothing fabric to prepare the disposable protective clothing.
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| CN101568589A (en) * | 2006-12-20 | 2009-10-28 | 巴塞尔聚烯烃意大利有限责任公司 | Filled polyolefin compositions |
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