CN111642842A - Protective mask and preparation method thereof - Google Patents

Protective mask and preparation method thereof Download PDF

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Publication number
CN111642842A
CN111642842A CN202010505702.0A CN202010505702A CN111642842A CN 111642842 A CN111642842 A CN 111642842A CN 202010505702 A CN202010505702 A CN 202010505702A CN 111642842 A CN111642842 A CN 111642842A
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China
Prior art keywords
filter layer
layer
parts
melt
protective mask
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CN202010505702.0A
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Chinese (zh)
Inventor
杨永平
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Shengxin Shanghai Textile Technology Co ltd
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Shengxin Shanghai Textile Technology Co ltd
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Priority to CN202010505702.0A priority Critical patent/CN111642842A/en
Publication of CN111642842A publication Critical patent/CN111642842A/en
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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
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • 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
    • A41D31/14—Air permeable, i.e. capable of being penetrated by gases
    • A41D31/145—Air permeable, i.e. capable of being penetrated by gases using layered materials
    • 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
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • 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

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The invention relates to a protective mask and a preparation method thereof. The mask body comprises an outer layer, a core layer and an inner layer from top to bottom in sequence. The sandwich layer from top to bottom is first filter layer, second filter layer and third filter layer in proper order, the material of first filter layer is hot-blast cotton, and the material of second filter layer is first melt-blown fabric, and the material of third filter layer is second melt-blown fabric. The first melt-blown cloth in the protective mask comprises, by weight, 50-90 parts of polypropylene resin, 40-80 parts of titanium dioxide, 30-50 parts of a dispersing agent, 5-10 parts of nano silicon dioxide, 5-10 parts of a coupling agent and 3-6 parts of an auxiliary agent. The outer layer, the first filter layer, the second filter layer and the third filter layer are connected with the inner layer through an ultrasonic welding process, and the ear belt is welded on the outer layer through the ultrasonic welding process. The first melt-blown fabric with good hydrophobicity and air permeability is prepared by adjusting the formula of the first melt-blown fabric.

Description

Protective mask and preparation method thereof
Technical Field
The application belongs to the technical field of protection, and particularly relates to a protective mask and a preparation method thereof.
Background
Recently, masks have become increasingly dependent on the reduction of air quality. The mask not only can filter pollutant particles in the atmosphere, but also can filter bacteria, viruses and the like to a certain extent. The existing protective mask mainly comprises three layers, namely an outermost layer, a middle layer and an innermost layer, wherein the outermost layer and the innermost layer are generally non-woven fabrics, and the middle layer is melt-blown fabric. The melt-blown fabric mainly uses polypropylene as a main raw material, and the diameter of the fiber can reach 1-5 microns. The superfine fiber with the unique capillary structure increases the number and the surface area of the fiber per unit area, so that the melt-blown fabric has good filterability. However, in mask applications, the performance requirements for meltblown fabrics are high, and high hydrophobic properties are also desirable to prevent droplets or liquids with contaminants on the outside from penetrating into the body of the wearer. The existing super-hydrophobic treatment for melt-blown cloth mainly comprises the steps of coating or dipping a layer of super-hydrophobic coating on the surface of the cloth, so that the surface of the cloth has low surface energy, and meanwhile, the pore diameter of the melt-blown cloth is reduced, so that the melt-blown cloth achieves the super-hydrophobic effect. However, these treatments tend to suffer from poor melt blown fabric breathability and fabric stiffness.
Disclosure of Invention
In order to solve the above technical problems, a first aspect of the present invention provides a protective mask, including a mask body, and ear bands respectively disposed on two sides of the mask body.
Preferably, a nose bridge clip is arranged on the mask body.
Preferably, the mask body is provided with a folding part in the middle.
Preferably, the mask body is provided with a nip.
Preferably, the nose bridge clip is made of magnet strips.
Preferably, the mask body is an outer layer, a core layer and an inner layer from top to bottom in sequence, and preferably, the ear straps are made of polyester fibers.
Preferably, the material of the outer layer is a first non-woven fabric, and the weight of the first non-woven fabric per square meter is 20-25 g.
Preferably, the sandwich layer is first filter layer, second filter layer and third filter layer from the top down in proper order, the material of first filter layer is hot-blast cotton, and the material of second filter layer is first melt-blown fabric, and the material of third filter layer is second melt-blown fabric.
Preferably, the first meltblown fabric and the second meltblown fabric are the same.
Preferably, the material of the inner layer is a second non-woven fabric, and the weight of the second non-woven fabric per square meter is 20-25 g.
Preferably, the first melt-blown fabric in the protective mask comprises, by weight, 50-90 parts of polypropylene resin, 40-80 parts of titanium dioxide, 30-50 parts of a dispersing agent, 5-10 parts of nano-silica, 5-10 parts of a coupling agent and 3-6 parts of an auxiliary agent.
Preferably, the density of the titanium dioxide is 4.0-4.3g/cm3。
Preferably, the dispersant comprises a hydrophobically modified sodium salt of a polycarboxylic acid.
Preferably, the coupling agent comprises an aluminate coupling agent.
Preferably, the auxiliary agent is stearic acid amide and/or polymethyl methacrylate.
Preferably, the nano-silica is a nano-silica modified by a silane coupling agent, and the silane coupling agent at least comprises one of gamma-aminopropyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyltrimethoxysilane and aniline methyltriethoxysilane.
Preferably, the silane coupling agent is vinyltriethoxysilane.
Preferably, the preparation method of the first meltblown fabric in the protective mask comprises the following steps:
(1) sequentially adding a certain amount of polypropylene resin, a dispersing agent, titanium dioxide, modified nano-silica, a coupling agent and an auxiliary agent into a reaction kettle, and stirring and mixing;
(2) putting the mixed material obtained in the step (1) into a screw extruder, and heating to 110 ℃ to obtain a melt;
(3) and (3) spinning the melt obtained in the step (2).
(4) And (4) carrying out melt-blowing on the filaments obtained in the step (3) to form cloth.
Preferably, the manufacturing method of the protective mask comprises the steps that the outer layer, the first filter layer, the second filter layer, the third filter layer and the inner layer are connected through an ultrasonic welding process, and the ear straps are welded on the outer layer through the ultrasonic welding process.
Has the advantages that: according to the invention, the air permeability and the hydrophobic property of the melt-blown fabric are improved by changing the formula of the first melt-blown fabric, and the protective mask made of the first melt-blown fabric also has higher air permeability and hydrophobic property.
Drawings
Fig. 1 is a schematic view showing the overall structure of the protective mask of the present invention.
Fig. 2 is a schematic cross-sectional view of the mask body according to the present invention.
1-mask main body, 2-ear band, 3-folding part, 4-nose bridge clip, 5-impression line, 6-outer layer, 7-first filter layer, 8-second filter layer, 9-third filter layer, 10-inner layer and 11-core layer.
Detailed Description
For purposes of the following detailed description, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary. Moreover, other than in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range-describing features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein. For example, a stated range from "1 to 10" should be considered to include any and all subranges between the minimum value of 1 and the maximum value of 10. Exemplary subranges of the range 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, and the like.
The invention provides a protective mask, which comprises a mask main body and ear bands respectively arranged at two sides of the mask main body.
Preferably, a nose bridge clip is arranged on the mask body.
Preferably, the nose bridge clip is made of magnet strips.
Preferably, the mask main body is an outer layer, a core layer and an inner layer from top to bottom in sequence, and the outer layer, the core layer and the inner layer are connected through an ultrasonic welding process.
Preferably, the ear belt is made of polyester fiber.
Preferably, the material of the outer layer is a first non-woven fabric, and the weight of the first non-woven fabric per square meter is 20-25 g.
Preferably, the sandwich layer is first filter layer, second filter layer and third filter layer from the top down in proper order, the material of first filter layer is hot-blast cotton, and the material of second filter layer is first melt-blown fabric, and the material of third filter layer is second melt-blown fabric.
The hot air cotton belongs to one of synthetic fiber filter cotton, has the characteristics of high filling power, good elasticity, soft hand feeling, strong heat retention, good air and water permeability, good filtering performance and the like, and can effectively improve the filtering performance and the heat preservation performance of the protective mask by adding a layer of hot air cotton into the protective mask.
Preferably, the first meltblown fabric and the second meltblown fabric are the same.
Preferably, the material of the inner layer is a second non-woven fabric, and the weight of the second non-woven fabric per square meter is 20-25 g.
Preferably, the first melt-blown fabric in the protective mask comprises, by weight, 50-90 parts of polypropylene resin, 40-80 parts of titanium dioxide, 30-50 parts of a dispersing agent, 5-10 parts of nano-silica, 5-10 parts of a coupling agent and 3-6 parts of an auxiliary agent.
The titanium dioxide is a titanium dioxide white solid or powdery amphoteric oxide, has good thermal stability, no toxicity, optimal opacity, optimal whiteness and brightness, strong adhesion and difficult chemical change. Titanium dioxide has excellent electrical properties due to its high dielectric constant. Because the melt-blown fabric is formed by bonding fibers, the strength of the melt-blown fabric can be improved due to the strong adhesive force of the titanium dioxide, and the filtering performance of the melt-blown fabric can be improved due to the higher dielectric constant of the titanium dioxide.
Preferably, the density of the titanium dioxide is 4.0-4.3g/cm3。
Preferably, the dispersant comprises a hydrophobically modified sodium salt of a polycarboxylic acid.
The dispersant is a surfactant which has two opposite properties of lipophilicity and hydrophilcity in a molecule. The amphiphilic agent is capable of uniformly dispersing solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquids, and also preventing settling and agglomeration of the particles to form stable suspensions. The compatibility of the oily as well as the aqueous components in the same system can be increased. The hydrophobically modified sodium polycarboxylate can not only improve the compatibility of each component in the system, but also improve the hydrophobicity in the system.
Preferably, the nano-silica is a nano-silica modified by a silane coupling agent, and the silane coupling agent at least comprises one of gamma-aminopropyltriethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyltrimethoxysilane and aniline methyltriethoxysilane.
Preferably, the silane coupling agent is vinyl triethoxysilane, and the weight ratio of the nano silica to the vinyl triethoxysilane is 50: 3.
preferably, the method for modifying the nano silicon dioxide comprises the following steps of:
(1) 5 parts of dried nano silica was weighed into a flask, and 100 parts of toluene was added to the flask, and stirred for 1 hour to mix.
(2) 0.3 part of vinyltriethoxysilane was added to the flask and dispersed by ultrasonic waves for 20 minutes. And (3) placing the solution dispersed by the ultrasonic waves into an oil bath heating reflux device, reacting for 6 hours at 125 ℃, cleaning and filtering by using ethanol, placing in a drying oven for drying for 36 hours after filtering, and obtaining the modified nano silicon dioxide.
The average particle size of the nano silicon dioxide obtained in the step (1) is 20nm, and the nano silicon dioxide is purchased from Nanjing Baokite New Material Co., Ltd, and has the model number of PST-G02.
The coupling agent is an additive for improving the interface performance of the synthetic resin and the inorganic filler or reinforcing material, can reduce the viscosity of the synthetic resin melt, and improves the dispersion degree of the filler so as to improve the processing performance, thereby ensuring that the product has good surface quality and mechanical, thermal and electrical properties. The dispersibility of the modified nano silicon dioxide is improved by adding the coupling agent.
Preferably, the coupling agent comprises an aluminate coupling agent. The aluminate coupling agent not only can improve the dispersibility of the modified nano-silica, but also can enhance the hydrophobicity of the system.
Preferably, the auxiliary agent is stearic acid amide and/or polymethyl methacrylate.
The preparation method of the first melt-blown fabric comprises the following steps of:
(1) sequentially adding 70 parts of polypropylene resin, 40 parts of dispersing agent, 60 parts of titanium dioxide, 7 parts of modified nano-silica, 7 parts of coupling agent and 5 parts of auxiliary agent into a reaction kettle, and stirring and mixing;
(2) putting the mixed material obtained in the step (1) into a screw extruder, and heating to 110 ℃ to obtain a melt;
(3) and (3) spinning the melt obtained in the step (2).
(4) And (4) carrying out melt-blowing on the filaments obtained in the step (3) to form cloth.
The manufacturing method of the protective mask comprises the steps that the outer layer, the first filter layer, the second filter layer, the third filter layer and the inner layer are connected through an ultrasonic welding process, and the ear bands are welded on the outer layer through the ultrasonic welding process.
According to the method, the silane coupling agent is used for modifying the nano silicon dioxide particles, and the silane coupling agent and the nano silicon dioxide are subjected to grafting reaction, so that the surface performance of the nano silicon dioxide is changed. Through adding modified nano-silica into polypropylene resin, modified nano-silica has played the effect of heterogeneous nucleation in polypropylene resin cooling crystallization process, has improved polypropylene resin's crystallinity, makes the crystal grain size diminish, and fibrous fineness grow, and the structure of fibre web is more sparse, has improved the gas permeability. The applicant finds that the addition of the nano-silica modified by the silane coupling agent can not only improve the air permeability, but also improve the hydrophobicity of the melt-blown fabric. However, the modified nano-silica has poor dispersibility in polypropylene resin and is easy to agglomerate, and the dispersibility of the nano-silica can be improved by adding the hydrophobically modified sodium polycarboxylate, and the overall hydrophobicity can be improved.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
Example 1
A protective mask comprises a mask body 1 and ear bands 2 respectively arranged on two sides of the mask body 1. The mask body 2 is provided with a nose bridge clip 4. The middle part of the mask body 1 is provided with a folding part 3, and the mask body 1 can be folded towards the middle through the folding part 3. The gauze mask main body 1 is provided with a nip 5, and the fluffiness of the gauze mask main body 1 can be reduced through the nip 5. The nose bridge clip 4 is made of a magnet strip. Mask main part 1 is outer 6, sandwich layer 11 and nexine 10 from the top down in proper order, be connected through ultrasonic bonding technology between outer 6, sandwich layer and the nexine 10, the material of ear strap 2 is polyester fiber.
The material of the outer layer 6 is a first nonwoven fabric, and the weight of the first nonwoven fabric per square meter is 25 g. Purchased from pioneer new materials, inc.
The core layer 11 is a first filter layer 7, a second filter layer 8 and a third filter layer 9 from top to bottom in sequence, the first filter layer 7 is made of hot air cotton, the second filter layer 8 is made of first melt-blown fabric, and the third filter layer 9 is made of second melt-blown fabric. The first meltblown web is the same as the second meltblown web.
The material of the inner layer is a second non-woven fabric, and the weight of the second non-woven fabric per square meter is 25 g. Purchased from pioneer new materials, inc.
The first melt-blown fabric comprises 50 parts by weight of polypropylene resinThe titanium pigment is obtained from Tofeng town Asia celebration plastic product factory in Zhongshan, and has a model of B4808 and 40 parts, and is obtained from Guangzhou Fengsen New Material Co Ltd, and has a model of titanium pigment R996 and a density of 4.0g/cm330 parts of dispersing agent, 5 parts of nano silicon dioxide, 5 parts of coupling agent and 3 parts of auxiliary agent. The dispersant is a hydrophobically modified sodium polycarboxylate salt available from Guangzhou Yao Innovative materials, Inc. under the model OROTAN 731A. The coupling agent is an aluminate coupling agent with model number of HZ401, and is purchased from Haomiga chemical company, Guangzhou. The auxiliary agent is stearic acid amide. The nano silicon dioxide is modified by a silane coupling agent, and the silane coupling agent is vinyl triethoxysilane. The method for modifying the nano silicon dioxide comprises the following steps of:
(1) 5 parts of dried nano silica was weighed into a flask, and 100 parts of toluene was added to the flask, and stirred for 1 hour to mix.
(2) 0.3 part of vinyltriethoxysilane was added to the flask and dispersed by ultrasonic waves for 20 minutes. And (3) placing the solution dispersed by the ultrasonic waves into an oil bath heating reflux device, reacting for 6 hours at 125 ℃, cleaning and filtering by using ethanol, placing in a drying oven for drying for 36 hours after filtering, and obtaining the modified nano silicon dioxide.
The average particle size of the nano silicon dioxide obtained in the step (1) is 20nm, and the nano silicon dioxide is purchased from Nanjing Baokite New Material Co., Ltd, and has the model of PST-G02.
The preparation method of the first melt-blown fabric comprises the following steps of:
(1) sequentially adding 50 parts of polypropylene resin, 30 parts of dispersing agent, 40 parts of titanium dioxide, 5 parts of modified nano-silica, 5 parts of coupling agent and 3 parts of auxiliary agent into a reaction kettle, stirring for 2 hours and mixing;
(2) putting the mixed material obtained in the step (1) into a screw extruder, and heating to 110 ℃ to obtain a melt;
(3) and (3) spinning the melt obtained in the step (2).
(4) And (4) carrying out melt-blowing on the filaments obtained in the step (3) to form cloth.
The mask is prepared by connecting the outer layer, the first filter layer, the second filter layer, the third filter layer and the inner layer through an ultrasonic welding process, and welding the ear band on the outer layer through the ultrasonic welding process.
Example 2
Compared with the embodiment 1, the difference of the embodiment is that the first melt-blown fabric in the protective mask comprises, by weight, 70 parts of polypropylene resin, 60 parts of titanium dioxide, 40 parts of dispersing agent, 7 parts of nano-silica, 7 parts of coupling agent and 5 parts of auxiliary agent.
Example 3
Compared with the embodiment 1, the difference of the embodiment is that the first melt-blown fabric in the protective mask comprises 90 parts by weight of polypropylene resin, 80 parts by weight of titanium dioxide, 50 parts by weight of dispersing agent, 10 parts by weight of nano-silica, 10 parts by weight of coupling agent and 6 parts by weight of auxiliary agent.
Comparative example 1
This comparative example differs from example 3 in that the dispersant is a sodium salt of a polycarboxylic acid which has not been hydrophobically modified, which is commercially available from Beijing Qifei scientific development Co., Ltd, model number SN-5040.
Comparative example 2
This comparative example differs from example 3 in that it does not contain a dispersant.
Comparative example 3
The difference between this comparative example and example 3 is that the coupling agent in this comparative example is a titanate coupling agent, model JTW-131, available from tokyo warp wefting chemical limited, south beige.
Performance testing
The first meltblown fabric was tested for the following properties:
and (3) testing the filtration efficiency: reference is made to GB/T2626-2006;
and (3) testing air permeability: reference is made to GB/T2626-2006;
testing a contact angle; reference GB/T30693-
First melt-blown fabric Filtration efficiency (%) Resistance to air intake (Pa) Contact angle (degree)
Example 1 95％ 152 139
Example 2 95.5％ 157 143
Example 3 95.8％ 160 145
Comparative example 1 94.8％ 193 118
Comparative example 2 88.4％ 214 115
Comparative example 3 83.4％ 204 116
The first meltblown fabric of example 3 was applied to a respirator to obtain a respirator having good air permeability and hydrophobicity. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.

Claims (10)

1. A protective mask is characterized by comprising a mask body and ear bands respectively arranged on two sides of the mask body.
2. The protective mask of claim 1 wherein said mask body is provided with a nose bridge clip.
3. The protective mask of claim 1 wherein said mask body comprises, in order from top to bottom, an outer layer, a core layer and an inner layer.
4. The protective mask of claim 3 wherein said outer layer is made of a first nonwoven fabric, said first nonwoven fabric having a weight per square meter of 20-25 g.
5. The protective mask according to any one of claims 3 or 4, wherein the core layer comprises a first filter layer, a second filter layer and a third filter layer in sequence from top to bottom, the first filter layer is made of hot air cotton, the second filter layer is made of first melt-blown fabric, and the third filter layer is made of second melt-blown fabric.
6. The protective mask of claim 3 wherein said inner layer is made of a second nonwoven fabric, said second nonwoven fabric having a weight of 20-25g per square meter.
7. The protective mask according to claim 5, wherein the first meltblown fabric is prepared from, by weight, 50-90 parts of polypropylene resin, 40-80 parts of titanium dioxide, 30-50 parts of dispersant, 5-10 parts of nano-silica, 5-10 parts of coupling agent and 3-6 parts of auxiliary agent.
8. The protective mask according to claim 7, wherein the nanosilica is nanosilica modified with a silane coupling agent, and the silane coupling agent comprises at least one of γ -aminopropyltriethoxysilane, γ - (2, 3-glycidoxy) propyltrimethoxysilane, γ - (methacryloyloxy) propyltrimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, γ -mercaptopropyltrimethoxysilane, N- β - (aminoethyl) - γ -aminopropylmethyldimethoxysilane, N- β - (aminoethyl) - γ -aminopropylmethyltrimethoxysilane, and anilinomethyltriethoxysilane.
9. The protective mask of claim 8 wherein said first meltblown fabric is prepared by a process comprising the steps of:
(1) sequentially adding a certain amount of polypropylene resin, a dispersing agent, titanium dioxide, modified nano-silica, a coupling agent and an auxiliary agent into a reaction kettle, stirring for 2 hours and mixing;
(2) putting the mixed material obtained in the step (1) into a screw extruder, and heating to 110 ℃ to obtain a melt;
(3) and (3) spinning the melt obtained in the step (2).
(4) And (4) carrying out melt-blowing on the filaments obtained in the step (3) to form cloth.
10. The protective mask of claim 9 wherein the outer layer, the first filter layer, the second filter layer, the third filter layer and the inner layer are joined by an ultrasonic welding process, and the ear straps are welded to the outer layer by an ultrasonic welding process.
CN202010505702.0A 2020-06-05 2020-06-05 Protective mask and preparation method thereof Withdrawn CN111642842A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112790455A (en) * 2021-03-19 2021-05-14 上海左耳零医疗科技有限公司 Antiviral and antibacterial protective mask and processing method thereof
CN112841771A (en) * 2021-01-21 2021-05-28 安徽九貔健康医药科技有限公司 KN95 mask for epidemic prevention
CN113134267A (en) * 2021-04-23 2021-07-20 东华大学 Thermal comfort filter material with multilayer structure and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112841771A (en) * 2021-01-21 2021-05-28 安徽九貔健康医药科技有限公司 KN95 mask for epidemic prevention
CN112790455A (en) * 2021-03-19 2021-05-14 上海左耳零医疗科技有限公司 Antiviral and antibacterial protective mask and processing method thereof
CN113134267A (en) * 2021-04-23 2021-07-20 东华大学 Thermal comfort filter material with multilayer structure and preparation method thereof

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Application publication date: 20200911