CN111685421A - Double-layer mask with nanofiber film-coated paper-based filter material - Google Patents
Double-layer mask with nanofiber film-coated paper-based filter material Download PDFInfo
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- CN111685421A CN111685421A CN202010567898.6A CN202010567898A CN111685421A CN 111685421 A CN111685421 A CN 111685421A CN 202010567898 A CN202010567898 A CN 202010567898A CN 111685421 A CN111685421 A CN 111685421A
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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
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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
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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
- A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2500/00—Materials for garments
- A41D2500/40—Papers
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- Textile Engineering (AREA)
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- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Filtering Materials (AREA)
Abstract
The invention relates to a paper-based double-layer mask and a preparation method thereof. The mask surface layer consists of an inner layer and an outer layer, the outer layer is a nanofiber membrane paper base hydrophobic filter layer, and the inner layer is a nanofiber membrane paper base skin-friendly filter layer. The two layers of the mask are both made of nanofiber film-covered paper-based filter materials, and have the functions of adsorbing and filtering fine particles, viruses and pathogenic microorganisms. The double-layer mask of the nanofiber-coated paper-based filter material has the advantages of simple production process, capability of improving the production efficiency by about 100 percent, high filter efficiency of over 99 percent and low respiratory resistance. The mask produced by the material has the advantages of simple process, large production capacity and production cost which is 15-20% of that of the melt-blown cloth, and well solves the problems of high price, low yield and short supply of the existing mask.
Description
Technical Field
The invention relates to a double-layer mask of a nanofiber-coated paper-based filter material, in particular to a paper-based double-layer mask which is simple in preparation process, low in breathing resistance, high in filtering efficiency and ecological and environment-friendly and a preparation method thereof, and belongs to the field of mask manufacturing.
Background
Along with the improvement of the production level and the living level of China, the requirements of people on health and environmental protection are higher and higher. However, in the industrialized stage of accelerated development in China, the yield and consumption of steel, coal, cement, electric power and the like are continuously increased, and adverse effects are brought to the environment and physical and mental health of people. In public places, or poorly ventilated rooms (wards and institutional settings), airborne dust and bacteria are the two most major pollutants. People use masks as protection more.
Since the occurrence of new coronary pneumonia epidemic, the problem of mask supply is concerned by all circles, and melt-blown cloth is a key material of a mask filtering link and is called as the heart of a medical surgical mask and an N95 mask. According to the report of people watching the mouth mask, the supply of the melt-blown cloth is very tight due to the great increase of the demand of the mouth mask in the near term, the price is even more than ten times, so that the mouth mask is 'difficult to obtain one piece of cloth' and 'one piece of cloth day price'. The supply of the melt-blown cloth is short, the existing goods are short, and a plurality of mask manufacturers cannot buy enough melt-blown cloth, so that the mask yield is influenced; the melt-blown fabric is expanded to 30-40 ten thousand yuan per ton from 2 ten thousand yuan per ton before epidemic situation, which not only increases the production cost, but also increases the sale price of the mask.
CN201610034279.4 discloses a filter paper for a PM2.5 protective mask and a preparation method thereof. The filter paper base material is mainly prepared from the following raw materials in parts by weight: 25-40 parts of tencel fiber, 20-35 parts of polyester fiber, 30-40 parts of calcium carbonate filler, 0.1-0.3 part of binary retention aid and 0.3-0.8 part of polyamide polyamine epichlorohydrin resin. The filter paper base material is manufactured by papermaking, and is subjected to rewetting, then enters a super-grade calender, and then is subjected to dilute acid dipping treatment, water leaching deacidification, drying and shaping in sequence. The invention adopts wet forming and super press polishing technology to manufacture compact base material, and adopts the combination of high filling and dilute acid treatment technology to construct static submicron-grade aperture; the filler is used for regulating and controlling the pore size distribution and porosity of the filter paper, so that the regulation and control of the breathing resistance are realized, and the requirements of high efficiency and low resistance of the filter paper for the PM2.5 protective mask are met. However, the scheme needs water leaching deacidification treatment, so that the water consumption is large, and the finished product period is long.
CN206603289U discloses a prevent haze gauze mask includes: the mask comprises a hanging rope, a mask body and a haze removal module; the mask body is in a double-layer three-dimensional shape provided with a hollow layer, and comprises an outer-layer mask in an inwards concave structure and an inner-layer mask arranged in the outer-layer mask; the inner layer mask is a moisture absorption breathable layer, and the inner diameter of the outer layer mask is larger than the outer diameter of the inner layer mask; the mask is provided with a detachable and replaceable moisture absorption inner layer mask which absorbs exhaled moisture and peculiar smell, so that the drying of the mask and the air filter is ensured, and the haze removal module comprises a battery module and a filtering module; the filtering module comprises a non-woven fabric filtering module, a carbon fiber adsorption module, an electrostatic dust collection module, an anion generation module and a dust-free paper moisture absorption module; the cross sections of the cathode and the anode of the electrostatic dust removal module are comb-shaped by a plurality of plates which are arranged in parallel, and the anode and the cathode are mutually inserted together, so that the anode plate and the cathode plate are arranged in parallel in a staggered manner to form a plurality of layers of electrostatic fields. CN207167844U discloses a medical mask, which comprises a mask body, wherein an openable flap is arranged in the middle of the mask body, the openable flap corresponds to the position of the mouth and nose, one side edge of the openable flap is connected with the mask body, when the openable flap is bonded to the mask body, the other side edges of the openable flap are bonded to the mask body through a first tear tab, and when the openable flap is opened, the outer surface of the openable flap is bonded to the outer surface of the mask body through a second tear tab; also comprises a bamboo charcoal fiber sterilizing filter screen with a thickness of 0.5-1.0mm, an adhesive layer is arranged around the filter screen, and the filter screen can be adhered to the inner surface of the lifting sheet through the adhesive layer. However, the masks all need special filter modules, and the arrangement and installation of the filter modules increase the production processes of the masks and reduce the production efficiency.
Disclosure of Invention
Aiming at the problems of low yield, high cost, white pollution caused by incapability of degradation and the like of polypropylene melt-blown fabric, the invention provides the method for manufacturing the nanofiber-coated paper-based filter material double-layer mask, which is simple to operate and moderate in cost, and is used for manufacturing the paper-based double-layer mask which is ecological, environment-friendly, high in static voltage, high in filtering efficiency and low in breathing resistance.
The technical scheme of the invention is as follows:
the utility model provides a two-layer gauze mask of nanofiber tectorial membrane paper base filter material, includes the gauze mask surface course, connects the ear-hang on the vertical limit of gauze mask surface course and inlays the bridge of the nose strip of following inside intermediate position on the gauze mask. The mask surface layer consists of an inner layer and an outer layer, the outer layer is a nanofiber membrane paper base hydrophobic filter layer, and the inner layer is a nanofiber membrane paper base skin-friendly filter layer. Wherein the outer layer has the properties of water resistance and splash resistance, and the inner layer has the properties of moisture resistance and water absorption. The two layers of the mask are both made of nanofiber film-covered paper-based filter materials, and have the functions of adsorbing and filtering fine particles, viruses and pathogenic microorganisms.
The mask in the prior art is mostly prepared from melt-blown cloth, the main raw material of the melt-blown cloth and non-woven fabric is polypropylene, the polypropylene is a semi-crystalline thermoplastic plastic, has high impact resistance and high toughness mechanical property, resists organic solvent and acid-base corrosion, and is one of common high polymer materials with wide application. According to statistics: the proportion of polypropylene in the waste plastic is about 18 percent. Therefore, the recycling of polypropylene materials has become one of the hot spots of concern. The treatment method of the waste mask in China mainly comprises the steps of burying the waste mask together with other garbage and optionally discarding the waste mask in the natural environment. These methods not only waste resources, but also cause great pollution to the environment. Due to the characteristics of the molecular structure of the polypropylene material, a large number of tertiary carbon atoms exist in a molecular chain, the atoms can be aged and degraded to different degrees under the action of light, oxygen and heat, short carbon chains are generated, and after being oxidized, the short carbon chains can release volatile substances of aldehydes and ketones, so that the polypropylene material is harmful to a human body. The invention uses the nanofiber laminated paper base filter material, the material is from paper, the cost is far lower than that of melt-blown fabric, and the nanofiber laminated paper base filter material has very good degradation performance and is environment-friendly.
Preferably, the filtering efficiency of the double-layer mask of the nanofiber-coated paper-based filtering material is 93-99.5%; more preferably, the filtering efficiency of the double-layer mask made of the nanofiber-coated paper-based filtering material is 95-99%.
Preferably, the respiratory resistance of the double-layer mask of the nanofiber-coated paper-based filter material is 60Pa-150 Pa.
Preferably, other indexes of the double-layer mask made of the nanofiber-coated paper-based filter material meet the national standard GB 2626-2019;
preferably, the ear hook is an elastic ear hook.
Preferably, the nose bridge strip with plasticity is arranged on the upper periphery of the mask body, and the nose bridge strip is configured to shape the upper periphery of the mask body.
Further preferably, the nose bridge strip is a metal nose bridge strip or an all-plastic nose bridge strip.
Preferably, the inner layer and the outer layer of the double-layer mask made of the nanofiber membrane-covered paper-based filter material are both made of the nanofiber membrane-covered paper-based filter material.
Preferably, the nanofiber-coated paper-based filter material is formed by compounding raw paper of the paper-based filter material and nanofiber coating. The nanofiber-coated paper-based filter material with the filtering efficiency of 90-97% can be prepared according to different preparation schemes of the raw paper of the paper-based filter material and the nanofiber coating. The nanofiber-coated paper-based filter material prepared by the raw material and preparation method in example 1 is preferably used.
Preferably, the filtration efficiency of the nanofiber membrane-paper-based filter material is 90-97%.
Preferably, the breathing resistance of the nanofiber-coated paper-based filter material is 45Pa to 130 Pa. The physical properties of the nanofiber-coated paper-based filter material are as follows: the quantification is as follows: 20-40g/m2The tensile strength is: 0.3KN/m-1.0 KN/m; the wet strength is: 15% -30%; the filtration efficiency is: 90% -97%; a respiratory resistance of：45Pa-130Pa。
Preferably, the outer layer of the mask is a nanofiber-coated paper-based hydrophobic filtering layer which comprises a nanofiber-coated paper-based filtering material and a water repellent agent coating layer coated on the nanofiber-coated paper-based filtering material. The nanofiber-coated paper-based hydrophobic filter layer is prepared by coating a water repellent agent on one side of a nanofiber-coated paper-based filter material.
More preferably, the coating water repellent agent is one of blade coating and spray coating.
Further preferably, the water repellent agent is one or more of ammonium zirconium carbonate, polyurea modified polyamide polyamine resin and/or fluorine-containing polyurethane. The zirconium carbonate is a novel inorganic water repellent agent developed and applied in recent years, does not contain toxic substances such as formaldehyde and the like, is used as a cross-linking agent or a water repellent agent in a coating formula, and is extremely easy to cross-link and solidify. Ammonium zirconium carbonate has high chemical activity, does not need heating in the curing and crosslinking process, can be quickly cured in the drying process of the coating as a crosslinking agent of the paper coating, can save a large amount of heat energy, can improve the vehicle speed and increase the yield. The polyurea modified polyamide polyamine resin is a novel water-resistant agent, does not contain free formaldehyde, has high curing speed, can endow adhesives such as soybean protein, starch and the like with good water resistance, particularly can effectively improve the printing adaptability of coated paper, and meets the latest requirements of the development of coating and printing technologies. The organic fluorine compound has lower surface free energy, and the hydrophobic property of the material can be obviously improved by introducing the organic fluorine compound into a polyurethane system.
Preferably, the inner layer of the mask is a nanofiber membrane paper-based skin-friendly filter layer which comprises a nanofiber membrane paper-based filter material and skin-friendly cream compounded on the nanofiber membrane paper-based filter material. The nanofiber membrane paper-based skin-friendly filtering layer is prepared by compounding a layer of skin-friendly cream on one side of a nanofiber membrane paper-based filtering material. The skin-friendly cream can improve the surface softness and the skin moisturizing property of the nanofiber-coated paper-based skin-friendly filter layer, so that the nanofiber-coated paper-based filter material double-layer mask has the functions of moisturizing and skin care.
More preferably, the composite skin-friendly cream is one of a spray type compound machine, a roll type compound machine and a spray type compound machine.
The invention also provides a preparation method of the double-layer mask of the nanofiber-coated paper-based filter material, which comprises the following specific steps:
(1) spraying and coating a water repellent agent on one surface of the first nanofiber film-coated paper-based filter material, wherein the coating weight is 2-4g/m2. And obtaining the nanofiber membrane paper base hydrophobic filter layer.
(2) Compounding skin-friendly cream on one side of the second nanofiber film-coated paper-based filter material in a compounding machine, wherein the compounding amount is 1-2g/m2. And obtaining the nanofiber laminated paper-based skin-friendly filter layer.
(3) Overlapping the nanofiber laminated paper base hydrophobic filter layer obtained in the step (1) and the nanofiber laminated paper base skin-friendly filter layer obtained in the step (2), wherein the coating water repellent layer and the composite skin-friendly cream layer are both positioned on the outer sides, and feeding the layers into a full-automatic mask machine for production.
The first nanofiber membrane-paper-based filter material and the second nanofiber membrane-paper-based filter material can be the same or different. The nanofiber laminated paper-based filter material can meet the following conditions: the filtering efficiency is 90-97%, and the respiratory resistance is 45-130 Pa; the physical properties were as follows: the quantification is as follows: 20-40g/m2The tensile strength is: 0.3KN/m-1.0 KN/m; the wet strength is: 15% -30%; the filtration efficiency is: 90% -97%; the respiratory resistance is: 45Pa to 130 Pa.
In the step (3), the water repellent agent coating layer of the nanofiber membrane-coated paper-based hydrophobic filter layer faces upwards, and the composite skin-friendly cream layer of the nanofiber membrane-coated paper-based skin-friendly filter layer faces downwards, and the composite skin-friendly cream layer is fed into a full-automatic mask machine for production. Or the coating water repellent agent layer of the nanofiber laminated paper base hydrophobic filter layer faces downwards, the composite skin-friendly cream layer of the nanofiber laminated paper base skin-friendly filter layer faces upwards, and the composite skin-friendly cream layer is fed into a full-automatic mask machine for production.
Advantageous effects
The double-layer mask of the nanofiber-coated paper-based filter material has the advantages of simple production process, high filter efficiency of over 99 percent and low respiratory resistance. The mask produced by the material has the advantages of simple process, large production capacity and production cost which is 15-20% of that of the melt-blown cloth, and well solves the problems of high price, low yield and short supply of the existing mask.
The double-layer mask of the nanofiber-coated paper-based filter material directly covers and combines two layers of the nanofiber-coated paper-based filter material, so that the process is simpler, and the production efficiency can be improved by about 100%.
In the preparation process of the double-layer mask of the nanofiber-coated paper-based filter material, degradable materials are used, and the mask is more environment-friendly compared with polypropylene melt-blown cloth and non-woven cloth, and meets the current policy requirements of energy conservation, emission reduction and environmental friendliness.
Drawings
The drawings illustrate specific embodiments of the present invention, including not only the indispensable structures of the invention, but also alternative and preferred embodiments.
Fig. 1 is a front view of a double-layer mask made of nanofiber-coated paper-based filter materials according to embodiments 2 to 6 of the present invention.
Fig. 2 is a double-layer structure diagram of a double-layer mask made of nanofiber-coated paper-based filter material according to embodiments 2 to 6 of the present invention.
Fig. 3 is an anatomical layer diagram of the outer layer of the double-layer mask made of the nanofiber-coated paper-based filter material according to embodiments 2 to 6 of the present invention.
Fig. 4 is an anatomical layer diagram of the inner layer of the double-layer mask made of the nanofiber-coated paper-based filter material according to embodiments 2 to 6 of the present invention.
Wherein:
1: a double-layer mask surface layer of nanofiber-coated paper-based filter material; 2: a nose bridge strip; 3: ear hanging; 4: the outer layer of the double-layer mask is made of nanofiber laminated paper-based filter materials; 5: the inner layer of the double-layer mask is made of nanofiber laminated paper-based filter materials; 6: a nano-coating layer of nano-fiber film-coated paper-based filter material; 7: a paper-based fiber raw paper layer of a nanofiber-coated paper-based filter material; 8: the nano-fiber film-coated paper-based filter material comprises a nano-coating layer and a waterproof agent; 9: the nanofiber laminated paper base filtering material comprises a nanofiber coating layer and skin-friendly cream.
Detailed Description
The technical solution of the present invention is further described with reference to the following examples, but the scope of the present invention is not limited thereto.
Source of raw materials
The nanofiber-coated paper-based filter material described in the examples is provided by Dongshun corporation. The physical properties of the nanofiber-coated paper-based filter material are as follows: the quantification is as follows: 20-40g/m2The tensile strength is: 0.3KN/m-1.0 KN/m; the wet strength is: 15% -30%; the filtration efficiency is: 90% -97%; the air resistance is: 45-130 Pa.
The skin-friendly cream is a cream with the functions of moistening and caring skin. The skin-friendly cream described in the examples is provided by dongshun group. Skin-friendly cream is a balm-like product that provides a thin film layer to paper, which may or may not transfer to the skin. It can endow paper with some new properties, such as skin moistening property, and make paper have the functions of moistening and caring skin; the surface handfeel softness is improved; reducing the surface roughness.
In the examples, other reagents, raw materials and the like are all common commercial products. The induced static voltage was measured using a YG401 fabric induction static tester, the distance between the tip of the test needle and the material was set to 2cm, a high voltage of 10kV was applied, and the test was stopped after 30 seconds.
The filtering efficiency and the breathing resistance adopt an American TSI8130 automatic filter material detector, and the test flow is set to be (85 +/-2) L/min in the test.
Example 1
The preparation method of the nanofiber laminated paper-based filter material comprises the following steps:
(1) preparation of coating liquid:
adding 0.1-0.5 part of dispersing agent and 0.5-2 parts of nano-fiber material into 1000 parts of water, then adding 20-30 parts of inorganic electret, 40-60 parts of polymer electret and 10-20 parts of diatomite, and dispersing for 20 minutes at a high speed under the dispersion condition of 1400r/min of a high-speed dispersing machine. And then sequentially adding 20-40 parts of adhesive, 5-10 parts of bacteriostatic agent and 0.3-0.8 part of defoaming agent, and finally dispersing for 20 minutes under the dispersion condition of a high-speed dispersion machine 1400r/min to obtain the coating liquid. The obtained coating has 8-12% of liquid-solid content.
(2) The quantitative ratio is 20-40g/m2Base paper is loaded intoCoating the prepared coating liquid on the base paper on a narrow slit coating machine through an extrusion nozzle on the coating machine, coating on two sides, wherein the coating weight is 6-8 g/m2(in terms of solid content), and drying.
(3) And (3) performing electret on the dried coated paper for 30-60 seconds by using electrostatic electret equipment, wherein the electret voltage is 30-60 KV. And (4) coiling to obtain the product.
The coating liquid proportion, the specific parameters of the preparation and the performance indexes of the obtained nanofiber film-coated paper-based filter material are as follows.
The antifoaming agent is a substance capable of reducing the surface tension of water, solutions, suspensions, etc., preventing the formation of foam, or reducing or eliminating the original foam. The defoaming agent is one or more of an organic silicon defoaming agent, a polyether defoaming agent or a higher alcohol defoaming agent. Commercially available defoamers can be used in the present invention.
The nanofiber material is a softwood nanofiber, and is prepared according to a TEMPO Cellulose oxidation method described in Determination of nanocellulose fiber length by laser sensitivity measurement (Tanaka et al, Cellulose 6 months 2014). The length-diameter ratio of the nano-fiber is 60, and the specific surface area is 5000m2/g。
Example 2
A preparation method of a mask comprises the following steps:
(1) the quantitative determination is 20g/m2One surface of the first nanofiber membrane-coated paper-based filter material is sprayed and coated with water-resistant agent zirconium ammonium carbonate, and the coating weight is 3.2g/m2. And obtaining the nanofiber membrane paper base hydrophobic filter layer.
(2) The quantitative determination is 20g/m2Compounding skin-friendly cream on one side of the second nanofiber film-coated paper-based filter material in a roll compounding machine, wherein the compounding amount is 1.4g/m2. And obtaining the nanofiber laminated paper-based skin-friendly filter layer.
(3) And (3) feeding the first nanofiber membrane-paper-based filtering material, the nanofiber membrane-paper-based hydrophobic filtering layer with the coating water repellent agent layer facing upwards and the nanofiber membrane-paper-based skin-friendly filtering layer with the composite skin-friendly cream layer facing downwards into a full-automatic mask machine for production. The obtained mask has the following performance indexes:
| index (I) | Example paper-based Filter Material |
| Induction static voltage (KV) | 1.3 |
| Filtration efficiency (%) | 95.46 |
| Respiratory resistance (Pa) | 93 |
Example 3
The other points are the same as example 2: in the step (1), the water repellent polyurea modified polyamide polyamine resin is coated by a scraper, and the coating weight is 2.1g/m2. Compounding the skin-friendly cream in the spray compounding machine in the step (2), wherein the compounding amount is 1.1g/m2。
The obtained mask has the following performance indexes:
| index (I) | Example paper-based Filter Material |
| Induction static voltage (KV) | 1.5 |
| Filtration efficiency (%) | 96.15 |
| Respiratory resistance (Pa) | 87 |
Example 4
A preparation method of a mask comprises the following steps:
(1) the quantitative determination is 30g/m2One surface of the first nanofiber film-coated paper-based filter material is sprayed and coated with a water repellent agent, and the coating weight is 3.3g/m2. And obtaining the nanofiber membrane paper base hydrophobic filter layer.
(2) The quantitative determination is 20g/m2Compounding skin-friendly cream on one side of the second nanofiber film-coated paper-based filter material in a roll compounding machine, wherein the compounding amount is 1.3g/m2. And obtaining the nanofiber laminated paper-based skin-friendly filter layer.
(3) And (3) feeding the nanofiber laminated paper base hydrophobic filter layer with the coating water repellent agent layer facing upwards and the composite skin-friendly cream layer facing downwards into a full-automatic mask machine for production. The obtained mask has the following performance indexes:
| index (I) | Example paper-based Filter Material |
| Induction static voltage (KV) | 1.6 |
| Filtration efficiency (%) | 96.94 |
| Respiratory resistance (Pa) | 106 |
Example 5
The other points are the same as example 4: in the step (1), the water repellent agent fluorine-containing polyurethane is coated by a scraper, and the coating weight is 2.6g/m2. Compounding the skin-friendly cream in the spray compounding machine in the step (2), wherein the compounding amount is 1.8g/m2. The obtained mask has the following performance indexes:
| index (I) | Example paper-based Filter Material |
| Induction static voltage (KV) | 1.9 |
| Filtration efficiency (%) | 98.13 |
| Respiratory resistance (Pa) | 113 |
Example 6
A preparation method of a mask comprises the following steps:
(1) the quantitative determination is 30g/m2One surface of the first nanofiber film-coated paper-based filter material is sprayed and coated with a water repellent agent, and the coating weight is 3.3g/m2. And obtaining the nanofiber membrane paper base hydrophobic filter layer.
(2) The quantitative determination is 20g/m2One side of the second nanofiber film-coated paper-based filter material is compounded in a roll compounding machineThe skin cream has a compounding amount of 1.4g/m2. And obtaining the nanofiber laminated paper-based skin-friendly filter layer.
(3) And (3) feeding the nanofiber laminated paper base hydrophobic filter layer with the coating water repellent agent layer facing upwards and the composite skin-friendly cream layer facing downwards into a full-automatic mask machine for production. The obtained mask has the following performance indexes:
| index (I) | Example paper-based Filter Material |
| Induction static voltage (KV) | 2.1 |
| Filtration efficiency (%) | 98.42 |
| Respiratory resistance (Pa) | 146 |
Comparative example 1
The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.
Claims (16)
1. A double-layer mask with nano-fiber film-coated paper-based filter material comprises
The mask surface layer consists of an inner layer and an outer layer,
the outer layer is a nano-fiber film-coated paper base hydrophobic filtering layer,
the inner layer is a nanofiber laminated paper-based skin-friendly filter layer;
an ear hook connected to the vertical edge of the mask surface layer, an
The nose bridge strip is embedded in the middle of the inner part of the upper edge of the mask.
2. The dual layer mask of claim 1 wherein both layers of the mask are made of nanofiber laminated paper based filter material.
3. The double-layer mask of claim 2, wherein the filtration efficiency of the nanofiber-coated paper-based filter material double-layer mask is 93% to 99.5%; more preferably, the filtering efficiency of the double-layer mask made of the nanofiber-coated paper-based filtering material is 95-99%.
4. The dual layer mask of claim 2 or 3 wherein the nanofiber-coated paper-based filter material has a breath resistance of 60Pa to 150 Pa.
5. The double-layered mask according to any one of claims 1 to 4, wherein the ear hook is an elastic ear hook.
6. The dual layer mask of any one of claims 1-4 wherein said nose bridge strip is a flexible nose bridge strip disposed at the upper periphery of said mask body and configured to shape the upper periphery of said mask body.
Further preferably, the nose bridge strip is a metal nose bridge strip or an all-plastic nose bridge strip.
7. The dual layer mask of any of claims 2-4 wherein said nanofiber-coated paper-based filter is a composite of paper-based filter base paper and nanofiber coating.
8. The double-layer mask of claim 7 wherein the filtration efficiency of the nanofiber-coated paper-based filter material is between 90% and 97%;
the respiratory resistance of the nanofiber laminated paper-based filter material is 45Pa-130 Pa; the physical properties of the nanofiber-coated paper-based filter material are as follows: the quantification is as follows: 20-40g/m2The tensile strength is: 0.3KN/m-1.0 KN/m; the wet strength is: 15% -30%; the filtration efficiency is: 90% -97%; the respiratory resistance is: 45Pa to 130 Pa.
9. The dual layer respirator of claim 7 wherein the outer layer of the respirator is a nanofiber membrane paper based hydrophobic filter layer comprising a nanofiber membrane paper based filter material and a water repellent coating layer applied thereon.
10. The dual-layer mask of claim 9 wherein the nanofiber membrane-paper based hydrophobic filter layer is made by coating a water repellent agent on one side of the nanofiber membrane-paper based filter material.
11. The dual layer mask of claim 10 wherein said coating water repellent agent is one of knife coating and spray coating.
12. The double-layered mask according to claims 9 to 11, wherein the water repellent agent is one or more of ammonium zirconium carbonate, polyurea modified polyamide polyamine resin and/or fluorine-containing polyurethane.
13. The dual-layer mask according to claim 7, wherein the mask inner layer is a nanofiber membrane-paper-based skin-friendly filter layer, and the nanofiber membrane-paper-based skin-friendly filter layer comprises a nanofiber membrane-paper-based filter material and skin-friendly cream compounded thereon.
14. The dual-layer mask of claim 13 wherein the nanofiber membrane-paper based skin-friendly filter layer is made by laminating a layer of skin-friendly cream on one side of the nanofiber membrane-paper based filter material.
15. The dual layer mask of claim 14 wherein said composite skin friendly cream is one of a shower, roll and mist combination.
16. The preparation method of the double-layer mask with nanofiber-coated paper-based filter material as claimed in any one of claims 1 to 15, comprising the following specific steps:
(1) spraying and coating a water repellent agent on one surface of the first nanofiber film-coated paper-based filter material, wherein the coating weight is 2-4g/m2Obtaining a nanofiber laminated paper base hydrophobic filter layer;
(2) compounding skin-friendly cream on one side of the second nanofiber film-coated paper-based filter material in a compounding machine, wherein the compounding amount is 1-2g/m2To obtain the nanofiber laminated paper-based skin-friendly filter layer,
(3) overlapping the nanofiber laminated paper base hydrophobic filter layer obtained in the step (1) and the nanofiber laminated paper base skin-friendly filter layer obtained in the step (2), wherein the coating water repellent layer and the composite skin-friendly cream layer are both positioned on the outer sides, and feeding the layers into a full-automatic mask machine for production.
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