CN103948190A - Micro-hole filtering mask and preparation method thereof - Google Patents
Micro-hole filtering mask and preparation method thereof Download PDFInfo
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- CN103948190A CN103948190A CN201410206920.9A CN201410206920A CN103948190A CN 103948190 A CN103948190 A CN 103948190A CN 201410206920 A CN201410206920 A CN 201410206920A CN 103948190 A CN103948190 A CN 103948190A
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Abstract
The invention provides a micro-hole filtering mask, and relates to the technical field of breath protection devices. The micro-hole filtering mask comprises a mask main body and ear belts, wherein the ear belts are fixedly connected to two sides of the mask main body , the mask main body comprises upper and lower layers of single jersey and filtering materials which are clamped between the upper and lower layers of single jersey, the filtering materials are formed by compositing a PTFE (Poly Tetra Fluoro Ethylene) micro-hole film which is covered by modified TPU (Thermoplastic Poly Urethane) and non-woven fabric, and the modified TPU is obtained by enabling inorganic type filling materials to be separated from the TPU after the inorganic type filling materials of which the diameters are smaller than 2.5 mum and the TPU are mixed to coat the PTFE micro-hole film. The invention also provides a preparation method of the micro-hole filtering mask. According to the micro-hole filtering mask and the preparation method, provided by the invention, the micro-hole filtering mask can be prepared by an operator according to the preparation method, the feasibility is high, the strength of the prepared micro-hole filtering mask is high, the mass is small, the gas permeability and the moisture permeability are good, the capacity of filtering micro dust is strong, and PM (Particulate Matter) 2.5 can be prevented.
Description
Technical field
The present invention relates to respiratory protective equipment technical field, in particular to a kind of micro porous filtration mouth mask and preparation method thereof.
Background technology
The new Air Quality Evaluation standard of progressively implementing along with all parts of the country, and the dense haze that many provinces and cities of China occur in the recent period, make " PM2.5 " more and more receive people's concern, and the common people have shown great enthusiasm to mouth mask.Mouth mask great majority are in the market all to utilize nonwoven, gauze, plastic net cloths etc. are prepared from, but these mouth masks knit hole or mesh is all larger, blocking effect to micronic dust is too little, the balance of gas permeability and filterability is difficult to coordinate, also there is the mouth mask that active carbon barrier layer is set in common mouth mask, but this type of mouth mask quality is heavier, dress uncomfortable, somebody proposes polytetrafluoroethylene film and the non-woven fabric compounded mouth mask of making after stretching, but the intensity of the polytetrafluoroethylene film after stretching is low, filtration to micronic dust is poor, and in recombination process, need to carry out gluing, and glue-spread is restive, the colloid of smearing also has filling effect, can damage the microcellular structure of microporous teflon membran film.
Summary of the invention
The object of the present invention is to provide that a kind of intensity is high, good permeability, lighter weight, and can filter micro porous filtration mouth mask of PM2.5 and preparation method thereof, to solve the above problems.
A kind of micro porous filtration mouth mask provided by the invention, comprise mask main body and the ear band that is fixedly connected on described mask main body both sides, described mask main body comprises upper and lower two-layer single jersey and is clipped in the filtering material between described single jersey, described filtering material is by the PTFE microporous barrier and non-woven fabric compounded the forming that are covered with modified thermoplastic polyurethane, after the mineral-type filler that described modified thermoplastic polyurethane is less than 2.5 μ m by diameter mixes with thermoplastic polyurethane and is coated on PTFE microporous barrier, described mineral-type filler comes off and obtains from described thermoplastic polyurethane, the mass ratio of described mineral-type filler and thermoplastic polyurethane is 1～8:92～99.
The good springiness of thermoplastic polyurethane, intensity is high, there is excellent waterproofing and moisture-penetration performances, PTFE microporous barrier configuration of surface is to have araneose microcellular structure, the cross section of film is a kind of network structure, in the three-dimensional structure in hole, there are the very complicated variations such as netted connection, hole edge cover, duct bending, form island structure, this membrane structure can effectively improve filterability and the gas permeability of film, and PTFE contains hydrophobic group, in addition the effect of microcellular structure, impels PTFE microporous barrier to have waterproof, moisture-inhibiting, permeability.After mixing, the mineral-type filler that thermoplastic polyurethane and diameter are less than to 2.5 μ m is coated in PTFE microporous barrier surface, strengthen PTFE micropore film strength, simultaneously, cover modified thermoplastic polyurethane the coming off due to mineral-type filler on PTFE microporous barrier surface, formation diameter is less than to the microcellular structure of 2.5 μ m, and former PTFE microporous barrier still keeps diameter to be greater than the surface microporous structure of 3 μ m, choose thermoplastic polyurethane and mineral-type filler that mass ratio is 92～99:1～8, can ensure after coated with PTFE microporous barrier, the porosity of film reaches 70～75%, and the higher intensity of maintenance.Modified thermoplastic polyurethane, PTFE microporous barrier are combined with the nonwoven with supporting role, have both been had good ventilative, poisture-penetrability, lighter weight, can filter again the filtering material of PM2.5, filtering material again with the compound mouth mask of making of single jersey, mouth mask can either filter micronic dust, dresses comfortable again.In addition, PTFE material is used for chemical industry, is referred to mouth mask field and makes full use of, and is also a technical breakthrough.
As preferred technical scheme, the content of compound rear described the above modified thermoplastic polyurethane of nonwoven is 3.5～6g/m
2, the content of described PTFE microporous barrier is 3.5～6g/m
2.On nonwoven, modified thermoplastic polyurethane, PTFE microporous barrier content are 3.5～6g/m
2, the mouth mask making can reach extraordinary effect.
As preferred technical scheme, described mineral-type filler is hydrated magnesium silicate superfine powder.Due to hydrated magnesium silicate superfine powder lubricated, resistance to bond is good, chemical property torpescence, so when after itself and thermoplastic polyurethane formation epoxy glue coating, easily come off, thereby be easy to form microcellular structure from coating.
As preferred technical scheme, described nonwoven is polypropylene fibre Nomex.The porosity of polypropylene fibre Nomex is large, permeability good, mechanical strength is high, and the mouth mask making is not only ventilative but also durable.
As preferred technical scheme, the edge that ear band one side is not set in described mask main body is provided with for mask main body laminating is fixed on to the ductile metal bar on the bridge of the nose.Bonding jumper is set on mouth mask, can fixes mouth mask, while making to wear mouth mask can be due to breathing upper cunning, obstruct the view, and bonding jumper has plasticity, user can, according to nose shape, adjust bonding jumper flexibly, mouth mask is worn more comfortable firm.
As preferred technical scheme, the described nonwoven of described filtering material is covered with the more close oral area of PTFE microporous barrier of modified thermoplastic polyurethane described in.Be covered with the PTFE microporous barrier of modified thermoplastic polyurethane away from oral area, can be first by micronic dust isolation, meanwhile, nonwoven is near oral area, more comfortable when user dresses.
Two of goal of the invention of the present invention is to provide a kind of preparation method who prepares described micro porous filtration mouth mask, comprises the steps: that the mineral-type filler that thermoplastic polyurethane and diameter is less than to 2.5 μ m joins in reactor, stirring 0.5～3h;
Mixture after stirring is evenly coated to PTFE microporous barrier surface, be under 120～160 DEG C, the hot-press arrangement linear velocity condition that is 13～22m/min in temperature, by the PTFE microporous barrier that is covered with modified thermoplastic polyurethane through hot-pressing processing, make PTFE micropore filtering film, then by PTFE micropore filtering film through cold wind processing;
Be under 120～150 DEG C, the hot-press arrangement linear velocity condition that is 3～12m/min in temperature, PTFE micropore filtering film and nonwoven are combined into filtering material through hot pressing, by filtering material and single jersey, the pressing of ear band, make mouth mask.
First by thermoplastic polyurethane and mineral-type filler mix and blend, the control of mixing time, can ensure uniformity of mixture, then utilize hot-pressing processing to be covered with the PTFE microporous barrier of modified thermoplastic polyurethane, ensure the abundant combination of mixture and PTFE microporous barrier, avoid departing from, layering, make PTFE micropore filtering film, by PTFE micropore filtering film through cold wind processing, can make mineral-type filler come off, in the situation that not adding any auxiliary agent, again compound to PTFE micropore filtering film and nonwoven hot pressing, directly the compound gluing of having avoided common process of hot pressing stops up film micropore structure, PTFE micropore filtering film and nonwoven hot pressing are made to filtering material after compound, control temperature and machine linear velocity, prevent that nonwoven from producing large deformation because processing temperature is overheated, or generation chemical change affects the intensity of nonwoven etc., guarantee that PTFE micropore filtering film and nonwoven are in semi-cured state simultaneously, impel the crosslinked of the two, finally by the filtering material obtaining and single jersey, the pressing of ear band, make intensity high, good permeability, filter the mouth mask of PM2.5 effect.Operator prepares mouth mask by this preparation method, simple and convenient, and feasibility is high.
As preferred technical scheme, described cold wind is treated to and utilizes the cooling PTFE micropore filtering film of air-cooler.Utilize air-cooler to process PTFE micropore filtering film, can accelerate coming off of mineral-type filler, and come off fully.
Compared with prior art, the invention has the beneficial effects as follows: a kind of micro porous filtration mouth mask provided by the invention and preparation method thereof, operator can prepare mouth mask according to the preparation method who provides, convenient and easy, the mouth mask intensity that makes is high, good permeability, lighter weight, the effect of filtering micronic dust is also very good, suitable for large-scale promotion.
Brief description of the drawings
Fig. 1 is the filtering material schematic diagram of the embodiment of the present invention one, embodiment bis-, embodiment tri-;
Fig. 2 is the mouth mask cross sectional representation of the embodiment of the present invention one, embodiment bis-, embodiment tri-;
Fig. 3 is the mouth mask schematic diagram of the embodiment of the present invention one;
Fig. 4 is the mouth mask schematic diagram of the embodiment of the present invention two, embodiment tri-.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment mono-
Fig. 1, Fig. 2, Fig. 3 shows the micro porous filtration mouth mask that the embodiment of the present invention one provides, comprise mask main body 1 and the ear band 2 that is fixedly connected on mask main body 1 both sides, mask main body 1 comprises upper and lower two-layer single jersey 6 and is clipped in the filtering material 5 between single jersey 6, filtering material 5 is composited by the PTFE microporous barrier 8 and the nonwoven 4 that are covered with modified thermoplastic polyurethane 7, after the mineral-type filler that modified thermoplastic polyurethane 7 is 2.4 μ m by diameter mixes with thermoplastic polyurethane and is coated on PTFE microporous barrier 8, mineral-type filler comes off and obtains from thermoplastic polyurethane, the mass ratio of mineral-type filler and thermoplastic polyurethane is 8:92.
Under normal temperature condition, the mineral-type filler that is 2.4 μ m by thermoplastic polyurethane and diameter joins in reactor in proportion, and high-speed stirred 0.5h disperses thermoplastic polyurethane and mineral-type uniform filling, fully mixes, and forms mixture;
Mixture after stirring is evenly coated to PTFE microporous barrier 8 surfaces, controlling temperature is 120 DEG C, utilize the conventional two roller hot presses in this area that roller linear velocity is 15m/min, PTFE microporous barrier 8 hot-pressing processing of modified thermoplastic polyurethane 7 will be covered with, ensure modified thermoplastic polyurethane 7 and the abundant combination of PTFE microporous barrier 8, make the PTFE micropore filtering film of environmental protection, again by PTFE micropore filtering film through air-cooler processing, mineral-type filler comes off from PTFE micropore filtering film, pass through electron microscopy observation, the aperture of PTFE micropore filtering film is less than 2.5 μ m, porosity is 61%, can effectively prevent PM2.5,
Be 120 DEG C in temperature, under the condition that the linear velocity of two roller hot presses is 5m/min, directly PTFE micropore filtering film and nonwoven 4 hot pressing be combined into filtering material 5, by filtering material 5 and single jersey 6,2 pressings of ear band, make mouth mask.
This kind of technique is simple and easy, convenient, efficient, and little to the infringement of microcellular structure, the mouth mask making is very durable, and dust-proof effect might as well.
Embodiment bis-
Fig. 1, Fig. 2, Fig. 4 shows the micro porous filtration mouth mask that the embodiment of the present invention two provides, comprise mask main body 1 and the ear band 2 that is fixedly connected on mask main body 1 both sides, the edge that ear band 2 one sides are not set in mask main body 1 is provided with for mask main body 1 laminating is fixed on to the ductile metal bar 3 on the bridge of the nose, mask main body 1 comprises upper and lower two-layer single jersey 6 and is clipped in the filtering material 5 between single jersey 6, filtering material 5 is composited by the PTFE microporous barrier 8 and the nonwoven 4 that are covered with modified thermoplastic polyurethane 7, after the hydrated magnesium silicate superfine powder that modified thermoplastic polyurethane 7 is 0.9 μ m by diameter is mixed with thermoplastic polyurethane and is coated on PTFE microporous barrier 8, hydrated magnesium silicate superfine powder comes off and obtains from thermoplastic polyurethane, the mass ratio of hydrated magnesium silicate superfine powder and thermoplastic polyurethane is 1:99, the nonwoven 4 of filtering material 5 is covered with the more close oral area of PTFE microporous barrier 8 of modified thermoplastic polyurethane 7.
Under normal temperature condition, the hydrated magnesium silicate superfine powder that is 0.9 μ m by thermoplastic polyurethane and diameter joins in reactor in proportion, and high-speed stirred 3h, makes thermoplastic polyurethane and hydrated magnesium silicate superfine powder dispersed, fully mixes, and forms mixture;
Mixture after stirring is evenly coated to PTFE microporous barrier 8 surfaces, controlling temperature is 150 DEG C, utilize the conventional two roller hot presses in this area that roller linear velocity is 15m/min, PTFE microporous barrier 8 hot-pressing processing of modified thermoplastic polyurethane 7 will be covered with, ensure modified thermoplastic polyurethane 7 and the abundant combination of PTFE microporous barrier 8, make the PTFE micropore filtering film of environmental protection, again by PTFE micropore filtering film through air-cooler processing, hydrated magnesium silicate superfine powder comes off from PTFE micropore filtering film, pass through electron microscopy observation, the aperture of PTFE micropore filtering film is less than 2.5 μ m, porosity is 68%, can effectively prevent PM2.5,
It is 150 DEG C in temperature, the linear velocity of two roller hot presses is under the condition of 10m/min, do not add any auxiliary agent, directly PTFE micropore filtering film and nonwoven 4 hot pressing are combined into filtering material 5, nonwoven 4 is selected polypropylene fibre Nomex, the porosity of polypropylene fibre Nomex is large, permeability is good, mechanical strength is high, PTFE micropore filtering film and polypropylene fibre Nomex are carried out compound, can be by the small thin fibre of polypropylene fibre Nomex surface exposure, at PTFE micropore filtering film and polypropylene fibre Nomex under the state in semi-solid preparation, impel thin fibre and the PTFE micropore filtering film on polypropylene fibre Nomex surface crosslinked, form the high filtering material 5 of intensity, finally by filtering material 5 and single jersey 6, 2 pressings of ear band, ductile metal bar 3 is engaged in to the position of the corresponding nose at the edge that ear band 2 one sides are not set, make mouth mask, when wearing, the nonwoven 4 of filtering material 5 is covered with the more close oral area of PTFE microporous barrier 8 of modified thermoplastic polyurethane 7, dress comfortable, and can effectively filter micronic dust.
This kind of technique is simple and easy, convenient, efficient, and little to the infringement of microcellular structure, the mouth mask making is very durable, and dust-proof effect might as well.
Embodiment tri-
Fig. 1, Fig. 2, Fig. 4 shows the micro porous filtration mouth mask that the embodiment of the present invention three provides, comprise mask main body 1 and the ear band 2 that is fixedly connected on mask main body 1 both sides, the edge that ear band 2 one sides are not set in mask main body 1 is provided with for mask main body 1 laminating is fixed on to the ductile metal bar 3 on the bridge of the nose, mask main body 1 comprises upper and lower two-layer single jersey 6 and is clipped in the filtering material 5 between single jersey 6, filtering material 5 is composited by the PTFE microporous barrier 8 and the nonwoven 4 that are covered with modified thermoplastic polyurethane 7, after the hydrated magnesium silicate superfine powder that modified thermoplastic polyurethane 7 is 1.5 μ m by diameter is mixed with thermoplastic polyurethane and is coated on PTFE microporous barrier 8, hydrated magnesium silicate superfine powder comes off and obtains from thermoplastic polyurethane, the mass ratio of hydrated magnesium silicate superfine powder and thermoplastic polyurethane is 2:98, the nonwoven 4 of filtering material 5 is covered with the more close oral area of PTFE microporous barrier 8 of modified thermoplastic polyurethane 7.
Under normal temperature condition, the hydrated magnesium silicate superfine powder that is 1.5 μ m by thermoplastic polyurethane and diameter joins in reactor in proportion, and high-speed stirred 1h, makes thermoplastic polyurethane and hydrated magnesium silicate superfine powder dispersed, fully mixes, and forms mixture;
Mixture after stirring is evenly coated to PTFE microporous barrier 8 surfaces, controlling temperature is 150 DEG C, utilize the conventional two roller hot presses in this area that roller linear velocity is 20m/min, PTFE microporous barrier 8 hot-pressing processing of modified thermoplastic polyurethane 7 will be covered with, ensure modified thermoplastic polyurethane 7 and the abundant combination of PTFE microporous barrier 8, make the PTFE micropore filtering film of environmental protection, again by PTFE micropore filtering film through air-cooler processing, hydrated magnesium silicate superfine powder comes off from PTFE micropore filtering film, pass through electron microscopy observation, the aperture of PTFE micropore filtering film is less than 2.5 μ m, porosity is 74%, can effectively prevent PM2.5, and gas permeability is also very good,
It is 140 DEG C in temperature, the linear velocity of two roller hot presses is under the condition of 8m/min, do not add any auxiliary agent, directly PTFE micropore filtering film and nonwoven 4 hot pressing are combined into filtering material 5, nonwoven 4 is selected polypropylene fibre Nomex, the porosity of polypropylene fibre Nomex is large, permeability is good, mechanical strength is high, PTFE micropore filtering film and polypropylene fibre Nomex are carried out compound, can be by the small thin fibre of polypropylene fibre Nomex surface exposure, at PTFE micropore filtering film and polypropylene fibre Nomex under the state in semi-solid preparation, impel thin fibre and the PTFE micropore filtering film on polypropylene fibre Nomex surface crosslinked, form the high filtering material 5 of intensity, finally by filtering material 5 and single jersey 6, 2 pressings of ear band, ductile metal bar 3 is engaged in to the position of the corresponding nose at the edge that ear band 2 one sides are not set, make mouth mask, when wearing, the nonwoven 4 of filtering material 5 is covered with the more close oral area of PTFE microporous barrier 8 of modified thermoplastic polyurethane 7, dress comfortable, and can effectively filter micronic dust.
This kind of technique is simple and easy, convenient, efficient, and little to the infringement of microcellular structure, the mouth mask making is very durable, and dust-proof effect might as well.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a micro porous filtration mouth mask, it is characterized in that: comprise mask main body and the ear band that is fixedly connected on described mask main body both sides, described mask main body comprises upper and lower two-layer single jersey and is clipped in the filtering material between described single jersey, described filtering material is by the PTFE microporous barrier and non-woven fabric compounded the forming that are covered with modified thermoplastic polyurethane, after the mineral-type filler that described modified thermoplastic polyurethane is less than 2.5 μ m by diameter mixes with thermoplastic polyurethane and is coated on PTFE microporous barrier, described mineral-type filler comes off and obtains from described thermoplastic polyurethane, the mass ratio of described mineral-type filler and thermoplastic polyurethane is 1～8:92～99.
2. micro porous filtration mouth mask according to claim 1, is characterized in that: the content of compound rear described the above modified thermoplastic polyurethane of nonwoven is 3.5～6g/m
2, the content of described PTFE microporous barrier is 3.5～6g/m
2.
3. micro porous filtration mouth mask according to claim 1, is characterized in that: described mineral-type filler is hydrated magnesium silicate superfine powder.
4. micro porous filtration mouth mask according to claim 1, is characterized in that: described nonwoven is polypropylene fibre Nomex.
5. micro porous filtration mouth mask according to claim 1, is characterized in that: the edge that ear band one side is not set in described mask main body is provided with for mask main body laminating is fixed on to the ductile metal bar on the bridge of the nose.
6. micro porous filtration mouth mask according to claim 1, is characterized in that: the described nonwoven of described filtering material is covered with the more close oral area of PTFE microporous barrier of modified thermoplastic polyurethane described in.
7. a preparation method who prepares the micro porous filtration mouth mask described in claim 1～6 any one, is characterized in that, comprises the steps: that the mineral-type filler that thermoplastic polyurethane and diameter is less than to 2.5 μ m joins in reactor, stirs 0.5～3h;
Mixture after stirring is evenly coated to PTFE microporous barrier surface, be under 120～160 DEG C, the hot-press arrangement linear velocity condition that is 13～22m/min in temperature, by the PTFE microporous barrier that is covered with modified thermoplastic polyurethane through hot-pressing processing, make PTFE micropore filtering film, then by PTFE micropore filtering film through cold wind processing;
Be under 120～150 DEG C, the hot-press arrangement linear velocity condition that is 3～12m/min in temperature, PTFE micropore filtering film and nonwoven are combined into filtering material through hot pressing, by filtering material and single jersey, the pressing of ear band, make mouth mask.
8. the preparation method of micro porous filtration mouth mask according to claim 7, is characterized in that: described cold wind is treated to and utilizes the cooling PTFE micropore filtering film of air-cooler.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI689330B (en) * | 2017-11-15 | 2020-04-01 | 薩摩亞商齊凌科技有限公司 | Method for manufacturing uv color changing mask |
| CN111286991A (en) * | 2020-03-19 | 2020-06-16 | 合肥科天水性科技有限责任公司 | Air filter medium and preparation method thereof |
| CN111389099A (en) * | 2020-03-19 | 2020-07-10 | 兰州科天投资控股股份有限公司 | Polymer microporous filter layer and preparation method and application thereof |
| CN111424435A (en) * | 2020-03-19 | 2020-07-17 | 合肥科天水性科技有限责任公司 | Air filter medium and preparation method thereof |
| CN111616442A (en) * | 2020-06-08 | 2020-09-04 | 乐昌市宝创环保新材料制品有限公司 | Reusable mask and preparation method thereof |
| CN113291006A (en) * | 2021-04-19 | 2021-08-24 | 浙江蓝天海纺织服饰科技有限公司 | Flame-retardant washable virus isolation fabric |
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| CN113291006A (en) * | 2021-04-19 | 2021-08-24 | 浙江蓝天海纺织服饰科技有限公司 | Flame-retardant washable virus isolation fabric |
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