CN111469507A - Efficient antibacterial nano-film for mask and preparation method and application thereof - Google Patents

Efficient antibacterial nano-film for mask and preparation method and application thereof Download PDF

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Publication number
CN111469507A
CN111469507A CN202010240480.4A CN202010240480A CN111469507A CN 111469507 A CN111469507 A CN 111469507A CN 202010240480 A CN202010240480 A CN 202010240480A CN 111469507 A CN111469507 A CN 111469507A
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film
polytetrafluoroethylene
nano
antibacterial
mask
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CN202010240480.4A
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杨东
梁燕
周冠辰
刘文明
江平
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Anhui Yuanchen Environmental Protection Science and Technology Co Ltd
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Anhui Yuanchen Environmental Protection Science and Technology Co Ltd
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    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
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    • 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
    • A41D13/1192—Protective face masks, e.g. for surgical use, or for use in foul atmospheres with antimicrobial agent
    • A—HUMAN NECESSITIES
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    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
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    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2500/00—Materials for garments
    • A41D2500/30—Non-woven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0668—The layers being joined by heat or melt-bonding
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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Inorganic Chemistry (AREA)
  • Physical Education & Sports Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

The invention relates to a preparation method of a high-efficiency antibacterial nano film for a mask, which comprises the following steps: blending polytetrafluoroethylene resin, aviation kerosene and silver-series inorganic antibacterial powder to prepare a pasty mixed material; pushing the pasty mixed material by an extruder to obtain a columnar mold material; preparing a polytetrafluoroethylene membrane from the columnar mould material through a calender, heating to remove aviation kerosene in the polytetrafluoroethylene membrane after calendering, and stretching the polytetrafluoroethylene membrane transversely and longitudinally to obtain a biaxially oriented polytetrafluoroethylene membrane; heat setting, namely rolling the biaxially oriented polytetrafluoroethylene film subjected to heat setting treatment to obtain an antibacterial polytetrafluoroethylene film; and (5) performing high-temperature hot-pressing compounding on the polyester needled felt and the antibacterial polytetrafluoroethylene film obtained in the step six to obtain the product. The invention also discloses a high-efficiency antibacterial nano film for the mask and application. The invention has the advantages of strong tensile strength, long service life and good antibacterial effect.

Description

Efficient antibacterial nano-film for mask and preparation method and application thereof
Technical Field
The invention belongs to the technical field of masks, and particularly relates to a nano-film for an efficient antibacterial mask, and a preparation method and application thereof.
Background
The conventional mask at present is composed of three layers of SMS, wherein the S layer represents an anti-sticking layer, the M layer is melt-blown non-woven fabric which is a core component for filtering viruses, the material of the mask is polypropylene and is formed by interweaving extremely fine fibers, the average diameter of the fibers is about 1-5 mu M, and as the polypropylene is a high-quality organic electret material, a certain amount of charges can be stored on the surface after surface electret treatment, and fine dust and viruses are adsorbed by an electrostatic adsorption mode.
However, the mask has a defect that the key polypropylene melt-blown non-woven fabric has non-uniform density and large gaps, and needs to be charged by surface electret treatment to adsorb particles through static electricity; the static electricity is easily affected by the humidity in the production and transportation environment, particularly, in the using process, the breathing makes the mask wet, the content of the mask is continuously weakened, and the protection capability is reduced, so experts recommend to replace the mask every 4 hours, and the service life of the mask is short.
Disclosure of Invention
The invention aims to solve the technical problems of weak tensile strength, short service life and limited antibacterial effect of the mask in the prior art.
The invention solves the technical problems through the following technical scheme: a preparation method of a high-efficiency antibacterial nano film for a mask comprises the following steps:
step one, blending polytetrafluoroethylene resin, aviation kerosene and silver-series inorganic antibacterial powder to prepare a pasty mixed material;
secondly, pushing the pasty mixed material obtained in the first step through an extruder to obtain a columnar mold material;
step three, preparing the columnar mold material obtained in the step two into a polytetrafluoroethylene membrane through a calender, heating to remove aviation kerosene in the polytetrafluoroethylene membrane after calendering, and obtaining the polytetrafluoroethylene membrane after aviation kerosene removal;
step four, transversely and longitudinally stretching the polytetrafluoroethylene membrane obtained in the step three after aviation kerosene is removed to obtain a biaxially oriented polytetrafluoroethylene film;
step five, carrying out heat setting treatment on the biaxially oriented polytetrafluoroethylene film obtained in the step four to obtain a biaxially oriented polytetrafluoroethylene film subjected to heat setting treatment;
step six, rolling the heat-set biaxially oriented polytetrafluoroethylene film obtained in the step five to obtain an antibacterial polytetrafluoroethylene film;
and step seven, performing high-temperature hot-pressing compounding on the polyester needled felt and the antibacterial polytetrafluoroethylene membrane obtained in the step six to obtain a product.
The high-efficiency antibacterial mask adopts the nano film to replace the polypropylene melt-blown non-woven fabric in the prior art, the polyester fiber is cheaper than the polypropylene fiber, and the polyester fiber is subjected to feeding, opening, cotton storage, carding, lapping and needle punching to form a felt, so that a polyester needle punched felt is obtained; the gram weight of the polyester needled felt single net is controlled to be 50-70g/m2(ii) a Compared with a melt-blown non-woven fabric, the polyester needle felt has the advantages of uniform and good gram weight, high tensile strength and long service life; book (I)The pore size distribution of the polytetrafluoroethylene membrane is concentrated between 100-200nm, the polytetrafluoroethylene membrane belongs to a nano-scale microporous membrane, antibacterial particles are loaded on the polytetrafluoroethylene membrane, on one hand, the traditional electrostatic adsorption filtration principle is replaced by the surface filtration of the polytetrafluoroethylene membrane, and the polytetrafluoroethylene membrane has long-term and high-efficiency filtration performance; on the other hand, the membrane material has antibacterial coating particles, so that bacteria and viruses in the air can be effectively blocked and eliminated.
Preferably, the mass ratio of the polytetrafluoroethylene resin, the aviation kerosene and the silver-based inorganic antibacterial powder in the first step is 19:5: 0.5.
Preferably, the briquetting time of the extruder in the second step is 30min, the extrusion pressure is 5.5-6.8MPa, and the temperature of the die is controlled at 60-70 ℃.
Preferably, the calender in the third step is a two-roll calender, and calendering is carried out at the temperature of 55 ℃ and the speed of 15-25 m/min; after the calendering, the aviation kerosene is removed at the temperature of 200 ℃ and 300 ℃.
Preferably, the transverse stretching in the fourth step is carried out under the conditions of 140 and 260, the film drawing speed is 2-10m/min, and the stretching multiple is 5-10 times; the longitudinal stretching is carried out at the temperature of 200 ℃ and 450 ℃, the film drawing speed is 10-20m/min, and the stretching ratio is 10-25 times.
Preferably, the specific heat setting process in the fifth step is that the irradiation intensity voltage of the far infrared heat source is 150-300V, and the distance between the two-way stretching polytetrafluoroethylene film and the far infrared heat source is 5-10 cm.
Preferably, the winding speed in the sixth step is 18-30 m/min.
Preferably, the high-temperature hot-pressing compounding of the seventh step is carried out in a laminating machine at the temperature of 220-.
The invention also discloses a nano film for the high-efficiency antibacterial mask, which is prepared by the preparation method of the nano film for the high-efficiency antibacterial mask.
The invention also discloses an application of the nano-film for the high-efficiency antibacterial mask prepared by the preparation method of the nano-film for the high-efficiency antibacterial mask in the antibacterial mask.
The invention has the advantages that: the high-efficiency antibacterial mask adopts the nano film to replace the polypropylene melt-blown non-woven fabric in the prior art, the polyester fiber is cheaper than the polypropylene fiber, and the polyester needle felt replaces the melt-blown processing mode, so that compared with the melt-blown non-woven fabric, the needle-punched non-woven fabric has the advantages of uniform gram weight, high tensile strength and long service life; antibacterial particles are loaded on the polytetrafluoroethylene nano-membrane, so that the surface filtration of the polytetrafluoroethylene membrane replaces the traditional electrostatic adsorption filtration principle, and the polytetrafluoroethylene nano-membrane has long-term and high-efficiency filtration performance; on the other hand, the membrane material has antibacterial coating particles, so that bacteria and viruses in the air can be effectively blocked and eliminated.
Drawings
Fig. 1 is a scanning electron microscope image of a nano-film for a high-efficiency antibacterial mask prepared in example 1 of the present invention, which is enlarged by 300 times.
FIG. 2 is a scanning electron microscope image of 2000 times magnified nano-film for high-efficiency antibacterial mask prepared in example 1 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
The embodiment discloses a preparation method of a high-efficiency antibacterial nano-film for a mask, which comprises the following steps:
step one, blending polytetrafluoroethylene resin, aviation kerosene and silver-based inorganic antibacterial powder according to a mass ratio of 19:5:0.5 under a stirring state to prepare a pasty mixed material; the stirring speed is 20m/min, and the stirring is performed for 60min in a forward rotation mode and 60min in a reverse rotation mode;
the silver inorganic antibacterial agent in each embodiment of the invention is PP master batch: model RHM-PP-FN, manufacturer: shanghai Runhe nanometer materials science and technology, Inc.
Secondly, pushing the pasty mixed material obtained in the first step through an extruder to obtain a columnar mold material;
wherein the compacting time is 30min, the extrusion pressure is 5.5MPa, and the temperature of a neck ring die is controlled at 60 ℃;
step three, standing the columnar mold material obtained in the step two in a 50 ℃ aqueous solution for 30min to release stress, and calendering the columnar mold material into a polytetrafluoroethylene membrane with the width of 16cm and the thickness of 10 threads by a two-roll calender at the speed of 0.2MPa and 15m/min at the temperature of 55 ℃; removing aviation kerosene at 200 ℃ after rolling to obtain a polytetrafluoroethylene membrane from which the aviation kerosene is removed;
step four, transversely and longitudinally stretching the polytetrafluoroethylene membrane obtained in the step three after aviation kerosene is removed to obtain a biaxially oriented polytetrafluoroethylene film; transverse stretching is carried out at 140 ℃, the film drawing speed is 2m/min, and the stretching ratio is 5 times; longitudinal stretching is carried out at the temperature of 200 ℃, the film drawing speed is 10m/min, and the stretching multiple is 10 times;
step five, performing heat setting treatment on the biaxially oriented polytetrafluoroethylene film obtained in the step four for 2min under the conditions that the irradiation intensity voltage of a far infrared heat source is 150V and the distance between the biaxially oriented polytetrafluoroethylene film and the far infrared heat source is 5cm, so as to obtain the biaxially oriented polytetrafluoroethylene film subjected to heat setting treatment;
step six, rolling the heat-set biaxially oriented polytetrafluoroethylene film obtained in the step five to obtain an antibacterial polytetrafluoroethylene film; the winding speed is 18 m/min;
step seven, the gram weight of the single net is 50/m2And (5) carrying out high-temperature hot-pressing compounding on the polyester needled felt and the antibacterial polytetrafluoroethylene film obtained in the sixth step in a laminating machine at the temperature of 220 ℃, the pressure of 0.3MPa and the speed of 1m/min to obtain the product.
As shown in fig. 1 and 2, the product of the present embodiment has a spider-web dense microporous structure on the surface, the pore size distribution of the membrane is concentrated between 100-200nm, and the product belongs to a microporous structure, and has very complicated changes such as net-shaped communication, pore-embedded sleeves, pore channel bending and the like on a three-dimensional structure, and physical isolation of small-particle bacteria and viruses can be directly and perfectly realized through a "surface filtration" mechanism, so that the product has an excellent surface filtration function and good permeability.
The high-efficiency antibacterial mask adopts the nano film to replace the polypropylene melt-blown non-woven fabric in the prior art, the polyester fiber is cheaper than the polypropylene fiber, and the polyester needle felt replaces the melt-blown processing mode, so that compared with the melt-blown non-woven fabric, the needle-punched non-woven fabric has the advantages of uniform gram weight, high tensile strength and long service life; antibacterial particles are loaded on the polytetrafluoroethylene nano-membrane, so that the surface filtration of the polytetrafluoroethylene membrane replaces the traditional electrostatic adsorption filtration principle, and the polytetrafluoroethylene nano-membrane has long-term and high-efficiency filtration performance; on the other hand, the membrane material has antibacterial coating particles, so that bacteria and viruses in the air can be effectively blocked and eliminated.
Example 2
The embodiment discloses a preparation method of a high-efficiency antibacterial nano-film for a mask, which comprises the following steps:
step one, blending polytetrafluoroethylene resin, aviation kerosene and silver-based inorganic antibacterial powder according to a mass ratio of 19:5:0.5 under a stirring state to prepare a pasty mixed material; the stirring speed is 20m/min, and the stirring is performed for 60min in a forward rotation mode and 60min in a reverse rotation mode;
secondly, pushing the pasty mixed material obtained in the first step through an extruder to obtain a columnar mold material;
wherein the compacting time is 30min, the extrusion pressure is 6.8MPa, and the temperature of a neck ring die is controlled at 70 ℃;
step three, standing the columnar mold material obtained in the step two in a 50 ℃ aqueous solution for 30min to release stress, and calendering the columnar mold material into a polytetrafluoroethylene membrane with the width of 32cm and the thickness of 16 threads on a two-roll calender at the temperature of 55 ℃, the pressure of 0.2MPa and the speed of 15-25 m/min; removing aviation kerosene at 300 ℃ after the rolling to obtain a polytetrafluoroethylene membrane after the aviation kerosene is removed;
step four, transversely and longitudinally stretching the polytetrafluoroethylene membrane obtained in the step three after aviation kerosene is removed to obtain a biaxially oriented polytetrafluoroethylene film; transverse stretching is carried out at 260 ℃, the film drawing speed is 10m/min, and the stretching ratio is 10 times; longitudinal stretching is carried out at 450 ℃, the film drawing speed is 20m/min, and the stretching multiple is 25 times;
step five, performing heat setting treatment on the biaxially oriented polytetrafluoroethylene film obtained in the step four for 2min under the conditions that the irradiation intensity voltage of a far infrared heat source is 300V and the distance between the biaxially oriented polytetrafluoroethylene film and the far infrared heat source is 10cm, so as to obtain the biaxially oriented polytetrafluoroethylene film subjected to heat setting treatment;
step six, rolling the heat-set biaxially oriented polytetrafluoroethylene film obtained in the step five to obtain an antibacterial polytetrafluoroethylene film; the winding speed is 30 m/min;
step seven, the gram weight of the single net is 60/m2And (5) carrying out high-temperature hot-pressing compounding on the polyester needled felt and the antibacterial polytetrafluoroethylene film obtained in the sixth step in a film laminating machine at the temperature of 230 ℃, the pressure of 0.3MPa and the speed of 1m/min to obtain the product.
Example 3
The embodiment discloses a preparation method of a high-efficiency antibacterial nano-film for a mask, which comprises the following steps:
step one, blending polytetrafluoroethylene resin, aviation kerosene and silver-based inorganic antibacterial powder according to a mass ratio of 19:5:0.5 under a stirring state to prepare a pasty mixed material; the stirring speed is 20m/min, and the stirring is performed for 60min in a forward rotation mode and 60min in a reverse rotation mode;
secondly, pushing the pasty mixed material obtained in the first step through an extruder to obtain a columnar mold material;
wherein the compacting time is 30min, the extrusion pressure is 6.2MPa, and the temperature of a neck ring die is controlled at 65 ℃;
step three, standing the columnar mold material obtained in the step two in a 50 ℃ aqueous solution for 30min to release stress, and calendering the columnar mold material into a polytetrafluoroethylene membrane with the width of 25cm and the thickness of 13 threads by a two-roll calender at the speed of 0.2MPa and 20m/min at the temperature of 55 ℃; removing aviation kerosene at 260 ℃ after rolling to obtain a polytetrafluoroethylene membrane from which the aviation kerosene is removed;
step four, transversely and longitudinally stretching the polytetrafluoroethylene membrane obtained in the step three after aviation kerosene is removed to obtain a biaxially oriented polytetrafluoroethylene film; transverse stretching is carried out at 200 ℃, the film drawing speed is 5m/min, and the stretching ratio is 8 times; longitudinal stretching is carried out at 350 ℃, the film drawing speed is 15m/min, and the stretching ratio is 20 times;
step five, performing heat setting treatment on the biaxially oriented polytetrafluoroethylene film obtained in the step four for 2min under the conditions that the irradiation intensity voltage of a far infrared heat source is 200V and the distance between the biaxially oriented polytetrafluoroethylene film and the far infrared heat source is 8cm, so as to obtain the biaxially oriented polytetrafluoroethylene film subjected to heat setting treatment;
step six, rolling the heat-set biaxially oriented polytetrafluoroethylene film obtained in the step five to obtain an antibacterial polytetrafluoroethylene film; the winding speed is 25 m/min;
step seven, the gram weight of the single net is 70/m2And (5) carrying out high-temperature hot-pressing compounding on the polyester needled felt and the antibacterial polytetrafluoroethylene film obtained in the sixth step in a film laminating machine at the temperature of 250 ℃, the pressure of 0.5MPa and the speed of 4m/min to obtain the product.
Example 4
The present embodiment discloses an antibacterial mask comprising a first anti-sticking layer, a nano-film layer for an antibacterial mask, and a second anti-sticking layer, wherein the nano-film layer is formed on the surface of the antibacterial mask. Wherein, the material on first antiseized layer, the antiseized layer of second is polypropylene, and the specification: 17.5cm 9.5 cm.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A preparation method of a high-efficiency antibacterial nano film for a mask is characterized by comprising the following steps:
step one, blending polytetrafluoroethylene resin, aviation kerosene and silver-series inorganic antibacterial powder to prepare a pasty mixed material;
secondly, pushing the pasty mixed material obtained in the first step through an extruder to obtain a columnar mold material;
step three, preparing the columnar mold material obtained in the step two into a polytetrafluoroethylene membrane through a calender, heating to remove aviation kerosene in the polytetrafluoroethylene membrane after calendering, and obtaining the polytetrafluoroethylene membrane after aviation kerosene removal;
step four, transversely and longitudinally stretching the polytetrafluoroethylene membrane obtained in the step three after aviation kerosene is removed to obtain a biaxially oriented polytetrafluoroethylene film;
step five, carrying out heat setting treatment on the biaxially oriented polytetrafluoroethylene film obtained in the step four to obtain a biaxially oriented polytetrafluoroethylene film subjected to heat setting treatment;
step six, rolling the heat-set biaxially oriented polytetrafluoroethylene film obtained in the step five to obtain an antibacterial polytetrafluoroethylene film;
and step seven, performing high-temperature hot-pressing compounding on the polyester needled felt and the antibacterial polytetrafluoroethylene membrane obtained in the step six to obtain a product.
2. The method for preparing a nano-film for a high-efficiency antibacterial mask as claimed in claim 1, wherein the mass ratio of the polytetrafluoroethylene resin, the aviation kerosene and the silver-based inorganic antibacterial powder in the first step is 19:5: 0.5.
3. The method for preparing a nano-film for a highly effective antibacterial mask as claimed in claim 1, wherein the second step comprises a step of pressing the extrusion die for 30min at an extrusion pressure of 5.5-6.8MPa and a step of controlling the die temperature at 60-70 ℃.
4. The method for preparing a nano-film for a high-efficiency antibacterial mask according to claim 1, wherein the calender in step three is a two-roll calender, and the calendering is carried out at 55 ℃ and at a speed of 15-25 m/min; after the calendering, the aviation kerosene is removed at the temperature of 200 ℃ and 300 ℃.
5. The method for preparing a nano-film for a highly effective antibacterial mask as claimed in claim 1, wherein the step four comprises transverse stretching at a temperature of 140-260 ℃, a film-drawing speed of 2-10m/min, and a stretching ratio of 5-10 times; the longitudinal stretching is carried out at the temperature of 200 ℃ and 450 ℃, the film drawing speed is 10-20m/min, and the stretching ratio is 10-25 times.
6. The method for preparing a nano-film for a highly effective antibacterial mask as claimed in claim 1, wherein the specific heat setting process in the fifth step is that the voltage of the far infrared heat source irradiation intensity is 150-300V, and the distance between the biaxially oriented polytetrafluoroethylene film and the far infrared heat source is 5-10 cm.
7. The method for preparing a nano-film for a highly effective antibacterial mask as claimed in claim 1, wherein the rolling speed in the sixth step is 18-30 m/min.
8. The method for preparing a nano-film for a highly effective antibacterial mask as claimed in claim 1, wherein the high temperature hot pressing composition of step seven is carried out in a laminating machine at a temperature of 220-.
9. A nano-film for a high-efficiency antibacterial mask prepared by the method for preparing a nano-film for a high-efficiency antibacterial mask according to any one of claims 1 to 8.
10. Use of the nano-film for a high-efficiency antibacterial mask prepared by the method for preparing the nano-film for a high-efficiency antibacterial mask according to any one of claims 1 to 8 in an antibacterial mask.
CN202010240480.4A 2020-03-31 2020-03-31 Efficient antibacterial nano-film for mask and preparation method and application thereof Withdrawn CN111469507A (en)

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CN102527248A (en) * 2012-01-06 2012-07-04 湖州森诺氟材料科技有限公司 Preparation method of photocatalytic antimicrobial polytetrafluoroethylene microporous membrane
CN106215585A (en) * 2016-07-21 2016-12-14 上海市凌桥环保设备厂有限公司 A kind of High dust holding PM0.1 filter screen
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Application publication date: 20200731