CN103643882A - PM2.5 protection composite screen window mesh - Google Patents
PM2.5 protection composite screen window mesh Download PDFInfo
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- CN103643882A CN103643882A CN201310654967.7A CN201310654967A CN103643882A CN 103643882 A CN103643882 A CN 103643882A CN 201310654967 A CN201310654967 A CN 201310654967A CN 103643882 A CN103643882 A CN 103643882A
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Abstract
The invention relates to a PM2.5 protection composite screen window mesh. The composite screen window mesh comprises a screen layer, an adsorption layer is arranged on one side of the screen layer, one face of the absorption layer is tightly attached to the screen layer, and viscose strips are arranged on the periphery of the other face of the adsorption layer. The adsorption layer at least comprises a polypropylene fiber spunbonded non-woven fabric layer and an ultra-fine denier electret melt-blown fiber non-woven fabric layer. Small vent holes are evenly distributed in the polypropylene fiber spunbonded non-woven fabric layer, and the weight per unit area of the ultra-fine denier electret melt-blown fiber non-woven fabric layer ranges from 25 grams per square meter to 50 grams per square meter. The PM2.5 protection composite screen window mesh can efficiently filter and adsorb PM2.5 particulate matter in air, the indoor air environment can be purified, the indoor PM2.5 concentration is effectively reduced, the PM2.5 filter efficiency reaches 99%, high breathability, light transmission and PM2.5 filter efficiency can be achieved, and high PM2.5 filter efficiency of the screen window mesh, breathability and light transmission of the screen window mesh, and normal air ventilation and daylighting can be guaranteed.
Description
Technical field
The present invention relates to a kind of composite window screen net, specifically a kind ofly can filter PM
2.5composite window screen net.
Background technology
High concentration PM
2.5pollution effect ambient air quality and healthy.PM
2.5refer to that diameter in atmosphere is less than or equal to the particle of 2.5 μ m, also referred to as entering lung particle.Everyone is average every day approximately sucks the air of approximately 10,000 liters, and the micronic dust that enters alveolar can be absorbed rapidly, without liver detoxification, directly enter blood circulation is distributed to whole body; Secondly, can damage the ability of hemoglobin delivery of oxygen, lose blood.Concerning the patient of anaemia and blood circulation disorder, may produce serious consequence.For example, can increase the weight of respiratory disease, even cause the heart diseases such as congestive heart failure and coronary artery.These particles can also enter blood by bronchus and alveolar, and pernicious gas wherein, heavy metal etc. are dissolved in blood, larger to the injury of health.In recent years, PM
2.5high pollution event takes place frequently, sometimes up to 800-900 μ g/m
3, than state specified standards 75 μ g/m
3standard exceed more than 10 times.
Along with resident's habitat condition improve constantly, the increase of floor space has brought the increase of door and window area, and the various door and windows that land enter huge numbers of families, and screen window becomes the requisite part of living at home.Yet it is estimated that, enter into indoor particle from common screen window and account for 80% of indoor total particulate amount every day.In gray haze, between the emergence period, a large amount of residents, at the outdoor mouth mask of having put on, still but can not wear masks indoor always.Due to the needs of ventilation, a large amount of PM
2.5by window, enter into again resident's indoor environment, cause outdoor large haze and indoor little haze.Screen window on market is of a great variety, and existing structure complexity is expensive, also has easily, but does not also have in the market a kind ofly can effectively filter PM
2.5screen window.Make effective filtration PM
2.5screen window just must effective filtration PM
2.5screen of screen window.
The common screen window of selling on the market now generally can only play shielding action to mosquito, for fine particulates, does not have filtration.Common dustproof screen window is if it were not for the physical arrangement from screen window is by increasing the grid order number of screen window, otherwise just stick one deck sorbing material and improve the filter efficiency to particle, but the filter efficiency for fine particulates is all bad, can not effectively solve indoor PM under outdoor haze weather
2.5concentration problems.
For effectively advancing PM
2.5the development innovation of protective mesh window, reaches and prevents air pollution, and the particularly infringement of airborne pellet to human body, so need a kind of PM badly
2.5high efficient protected screen window composite window screen net.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of have good gas permeability and light transmission, also there is good hygroscopicity, the PM that cost is low simultaneously
2.5protection composite window screen net.
Technical scheme of the present invention is as follows:
A kind of PM
2.5protection composite window screen net, described composite window screen net comprises warp layer stratum reticulare, it is characterized in that, a side at gauze layer is provided with adsorption layer, the one side of adsorption layer is close to gauze layer, the periphery of another side is provided with viscose bar, described adsorption layer at least comprises polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer, in described polypropylene spunbond nonwoven layer, be evenly equipped with small ventilating holes, small ventilating holes runs through polypropylene spunbond nonwoven layer, the aperture of small ventilating holes is 0.3～0.6mm, described super fine denier electret meltblown fibers nonwoven layer weight per unit area is 25～50g/m
2, polypropylene spunbond nonwoven layer weight per unit area is 15～25g/m
2.
Super fine denier electret meltblown fibers nonwoven layer weight per unit area of the present invention is according to screen of screen window and regioselective, that those skilled in the art obtains through long-term experiment test, the present invention, by selecting rightly each layer of weight per unit area, can have gas permeability, light transmission and PM concurrently high-levelly
2.5filter efficiency.Both guaranteed the efficient PM of screen of screen window
2.5filter efficiency, has guaranteed again gas permeability and the light transmission of screen of screen window, and particularly super fine denier electret meltblown fibers nonwoven layer weight per unit area is to the gas permeability of screen window, light transmission and PM
2.5filter efficiency is most important, finds, when super fine denier electret meltblown fibers nonwoven layer weight per unit area is less than 25g/m through long-term experiment
2time, the PM of screen of screen window
2.5filter efficiency is obviously low, along with super fine denier electret meltblown fibers nonwoven layer weight per unit area increases gradually, and the PM of screen of screen window
2.5filter efficiency increases gradually, when thin dawn electret meltblown fibers nonwoven layer weight per unit area reaches 40g/m
2time, along with the increase of unit area grammes per square metre, the PM of screen of screen window
2.5filter efficiency is than grammes per square metre 40g/m
2filter efficiency remains basically stable, but along with the increase of super fine denier electret meltblown fibers nonwoven layer weight per unit area, the gas permeability of screen of screen window reduces gradually, and light transmission reduces greatly, and cost increases simultaneously.Each layer of weight per unit area of the present invention is all to have gas permeability, light transmission and PM concurrently based on screen of screen window
2.5filter efficiency and regioselective.
The present invention is preferred, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer and one deck super fine denier electret meltblown fibers nonwoven layer, one side and the gauze layer of described polypropylene spunbond nonwoven layer are close to, opposite side and super fine denier electret meltblown fibers nonwoven layer are close to, and viscose bar is attached on the periphery in super fine denier electret meltblown fibers nonwoven layer outside.Super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm.
The present invention is preferred, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer and two-layer super fine denier electret meltblown fibers nonwoven layer, polypropylene spunbond nonwoven layer is clipped between two-layer super fine denier electret meltblown fibers nonwoven layer, gauze layer is close to the wherein outside of one deck super fine denier electret meltblown fibers nonwoven layer, viscose bar is attached on the periphery in other one deck super fine denier electret meltblown fibers nonwoven layer outside, and super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm.
The present invention is preferred, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer, one deck super fine denier electret meltblown fibers nonwoven layer and layer of active carbon spongy layer, super fine denier electret meltblown fibers nonwoven layer is clipped between one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer, gauze layer is close to the outside of active carbon spongy layer, viscose bar is attached on the periphery in polypropylene spunbond nonwoven layer outside, and super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm, the thickness of active carbon spongy layer is 0.4mm～0.6mm.
The present invention is preferred, described adsorption layer comprises two-layer super fine denier electret meltblown fibers nonwoven layer, one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer, one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer are clipped between two-layer super fine denier electret meltblown fibers nonwoven layer, gauze layer is close to the wherein outside of one deck super fine denier electret meltblown fibers nonwoven layer, viscose bar is attached on the periphery in other one deck super fine denier electret meltblown fibers nonwoven layer outside, super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm, the thickness of active carbon spongy layer is 0.4mm～0.6mm.
Further preferred, the weight per unit area of polypropylene spunbond nonwoven layer is 20g/m
2, super fine denier electret meltblown fibers nonwoven layer weight per unit area is 40g/m
2.
Further preferred, the weight per unit area of polypropylene spunbond nonwoven layer is 20g/m
2, super fine denier electret meltblown fibers nonwoven layer weight per unit area is 35g/m
2.
The present invention is preferred, and in every square meter polypropylene spunbond nonwoven layer, the quantity of small ventilating holes is 8～120,000, and described gauze layer is 500 order-1500 object gauzes.
Screen of screen window of the present invention is multi-layer compound structure, can increase its filter effect to pellet, when super fine denier electret meltblown fibers nonwoven layer weight per unit area is 20g/m
2time filter effect best, screen of screen window of the present invention has good gas permeability, core material adopts the super fine denier electret meltblown fibers non-weaving cloth of micro-filtration technical finesse, PM, with resident electrostatic field, is worked as in surface
2.5when granular superfine microparticle passes through the space of micro-filtration filter material, the electrostatic field being produced by micro-filtration filter material and weak current are caught, the pressure reduction filtering is than conventional low 30 times of left and right, in polypropylene spunbond nonwoven layer, be provided with small ventilating holes simultaneously, so under equal filter efficiency, this screen of screen window improves permeability greatly.The increase of active carbon spongy layer, can be when filtering Nanoparticle the poisonous and harmful substance in absorbed air as benzene, formaldehyde, ammonia, sulfur dioxide etc. and remove airborne peculiar smell.The inside and outside gauze arranging can strengthen its pull resistance and application life, and can remove in advance airborne large particulate matter.
The preparation of described super fine denier electret meltblown fibers nonwoven layer is by prior art, and preferred version of the present invention is as follows:
The preparation of super fine denier electret meltblown fibers nonwoven layer:
(1) tourmaline that is 400-600nm by particle diameter is put into super mixer, 3～4% low density polyethylene (LDPE) waxes, the antioxidant that after pre-thermal agitation 20min, add tourmaline weight, then divide 2～5% coupling agent titanate esters that add tourmaline weight for three times, after stirring respectively 20min, take out, in drying box, constant temperature is 105 ℃, dries 2 hours.
(2) tourmaline of handling well through step (1) is added in mixer and mixed about 10 minutes with 1:4 ratio with polypropylene chip, again the tourmaline mixing and polypropylene chip are melt extruded at 120～140 ℃ of temperature, cooling through water-bath, cutting granulating, makes modified master batch.
(3) modified master batch making is mixed with polypropylene chip under the condition of 250 ± 1 ℃ by 30% mass percent, take melt flow index as 1200g/10min, make melt-blowing nonwoven, through corona discharge, melt-blowing nonwoven is carried out to electret again, after electret, contain tourmaline polypropylene melt-blown superfine fiber nonwovens, fibre web surface charge density obviously increases, electret charge storage ability also has enhancing, filter efficiency improves 40%, wherein during tourmaline content 6%, electret resultant effect is best, and its surface charge density can reach-10 μ c/m
2, diameter is less than to 0.26 μ m grain, when filtration resistance is 7Pa left and right, filter efficiency reaches 95.8%.
The present invention is preferred, and the fiber number that forms the fiber of above-mentioned super fine denier electret meltblown fibers nonwoven layer is 0.01～0.1 danier.The diameter of superfine fibre is very little, is so small to have only 1/40th of hairline, so superfine fibre has been endowed many superior performances: feel is soft and smooth, good permeability, to granule adsorption effect significantly, there is extremely strong clean effect etc.
The present invention also provides a kind of preparation method of PM2.5 protection composite window screen net, and step is as follows:
In order gauze layer, adsorption layer are stacked and be close together, utilize hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together, the temperature of described hot pressing is 80-150 ℃, pressing pressure 4.9-25Mpa, when adsorption layer comprises one deck polypropylene spunbond nonwoven layer and one deck super fine denier electret meltblown fibers nonwoven layer, in order gauze layer, polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together; When adsorption layer comprises one deck polypropylene spunbond nonwoven layer and two-layer super fine denier electret meltblown fibers nonwoven layer, in order gauze layer, super fine denier electret meltblown fibers nonwoven layer, polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together; When adsorption layer comprises one deck polypropylene spunbond nonwoven layer, one deck super fine denier electret meltblown fibers nonwoven layer and layer of active carbon spongy layer, in order gauze layer, active carbon spongy layer, super fine denier electret meltblown fibers nonwoven layer and polypropylene spunbond nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together; When adsorption layer comprises two-layer super fine denier electret meltblown fibers nonwoven layer, one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer, in order gauze layer, super fine denier electret meltblown fibers nonwoven layer, active carbon spongy layer, polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together.
The application of PM2.5 protection composite window screen net of the present invention, during use, by gauze layer toward the outer side, adsorption layer is towards screen window gauze, thereby the viscose bar of adsorption layer periphery is sticked on to window screen, on the net PM2.5 is protected to composite window screen net to be fixed on existing window screen online, described screen window gauze is glass fiber mesh, polyester gauze or stainless steel gauze.
Advantage of the present invention is as follows:
(1) PM of the present invention
2.5protection composite window screen net can filter the PM in absorbed air efficiently
2.5particle, can contribute to the environment that purifies the air of a room, and effectively reduces indoor PM
2.5concentration, PM
2.5filter efficiency reaches 99.75%, and can have gas permeability, light transmission and PM concurrently high-levelly
2.5filter efficiency, had both guaranteed the efficient PM of screen of screen window
2.5filter efficiency, has guaranteed again gas permeability and the light transmission of screen of screen window can guarantee normal circulation of air and daylighting.
(2) PM of the present invention
2.5protection composite window screen net also can filter pollen particles fine and closely woven in absorbed air effectively, can provide a comfortable environment for pollen hypersensitivity crowd.
(3) PM of the present invention
2.5protection composite window screen net nonwoven has stronger pull resistance as adventitia, solved and first had some products yielding defect in use for some time, also there is good hygroscopicity simultaneously, there is good effect on moisture extraction, avoid entering the discomfort that indoor air causes because humidity is excessive.
Accompanying drawing explanation
Fig. 1 is the PM of embodiment 1
2.5protection composite window screen web frame schematic diagram.
Fig. 2 is the PM of embodiment 2
2.5protection composite window screen web frame schematic diagram.
Fig. 3 is the PM of embodiment 3
2.5protection composite window screen web frame schematic diagram.
Fig. 4 is the PM of embodiment 4
2.5protection composite window screen web frame schematic diagram.
Fig. 5 is that the weight of super fine denier electret meltblown fibers nonwoven layer unit area is to PM
2.5filter effect curve map.
Fig. 6 is the PM of embodiment 1
2.5protection composite window screen net effect on moisture extraction figure.
In figure: 1, polypropylene spunbond nonwoven layer, 2, super fine denier electret meltblown fibers nonwoven layer, 3, active carbon spongy layer, 4, gauze layer.
The specific embodiment
Below by specific embodiment, the present invention will be further described by reference to the accompanying drawings, but be not limited to this.
A kind of PM2.5 protection composite window screen net, structure as shown in Figure 1, composite window screen net comprises warp layer stratum reticulare 4, a side at gauze layer 4 is provided with adsorption layer, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer 1 and one deck super fine denier electret meltblown fibers nonwoven layer 2, one side and the gauze layer 4 of polypropylene spunbond nonwoven layer 1 are close to, opposite side and super fine denier electret meltblown fibers nonwoven layer 2 are close to, and the periphery in super fine denier electret meltblown fibers nonwoven layer 2 outsides is provided with viscose bar.In described polypropylene spunbond nonwoven layer, be evenly equipped with small ventilating holes, small ventilating holes runs through polypropylene spunbond nonwoven layer, and the aperture of small ventilating holes is 0.5mm, and in every square meter polypropylene spunbond nonwoven layer, the quantity of small ventilating holes is 100,000.Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 25g/m
2, thickness is 0.2mm, polypropylene spunbond nonwoven layer 1 weight per unit area is 20g/m
2, thickness is 0.4mm.
In order gauze layer, polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together; The temperature of described hot pressing is 100 ℃, pressing pressure 15Mpa.
The PM2.5 protection composite window screen net net effect on moisture extraction of the present embodiment is shown in Fig. 6.
A kind of PM
2.5protection composite window screen net, as described in Example 1, difference is structure,
Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 30g/m
2.
A kind of PM
2.5protection composite window screen net, as shown in Figure 1, difference is structure,
Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 35g/m
2.
A kind of PM
2.5protection composite window screen net, as shown in Figure 1, difference is structure,
Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 40g/m
2.
A kind of PM
2.5protection composite window screen net, as shown in Figure 1, difference is structure,
Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 50g/m
2.
Embodiment 6
A kind of PM
2.5protection composite window screen net, structure as shown in Figure 2, composite window screen net comprises warp layer stratum reticulare 4, a side at gauze layer 4 is provided with adsorption layer, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer 1 and two-layer super fine denier electret meltblown fibers nonwoven layer 2, polypropylene spunbond nonwoven layer 1 is clipped between two-layer super fine denier electret meltblown fibers nonwoven layer 2, gauze layer 4 is close to the wherein outside of one deck super fine denier electret meltblown fibers nonwoven layer 2, viscose bar is attached on the periphery in other one deck super fine denier electret meltblown fibers nonwoven layer 2 outsides, in described polypropylene spunbond nonwoven layer, be evenly equipped with small ventilating holes, small ventilating holes runs through polypropylene spunbond nonwoven layer, the aperture of small ventilating holes is 0.3mm, in every square meter polypropylene spunbond nonwoven layer, the quantity of small ventilating holes is 120,000.Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 40g/m
2, thickness is 0.2mm, polypropylene spunbond nonwoven layer 1 weight per unit area is 20g/m
2, thickness is 0.4mm.
Embodiment 7
A kind of PM
2.5protection composite window screen net, structure as shown in Figure 3, composite window screen net comprises warp layer stratum reticulare 4, a side at gauze layer 4 is provided with adsorption layer, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer 1, one deck super fine denier electret meltblown fibers nonwoven layer 2 and layer of active carbon spongy layer 3, super fine denier electret meltblown fibers nonwoven layer 2 is clipped between one deck polypropylene spunbond nonwoven layer 1 and layer of active carbon spongy layer 3, gauze layer 4 is close to the outside of active carbon spongy layer 3, viscose bar is attached on the periphery in polypropylene spunbond nonwoven layer 1 outside, in described polypropylene spunbond nonwoven layer 1, be evenly equipped with small ventilating holes, small ventilating holes runs through polypropylene spunbond nonwoven layer, the aperture of small ventilating holes is 0.6mm, in every square meter polypropylene spunbond nonwoven layer, the quantity of small ventilating holes is 80,000.Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 35g/m
2, thickness is 0.3mm, polypropylene spunbond nonwoven layer 1 weight per unit area is 20g/m
2, thickness is 0.4mm.
Embodiment 8
A kind of PM
2.5protection composite window screen net, structure as shown in Figure 4, composite window screen net comprises warp layer stratum reticulare 4, a side at gauze layer 4 is provided with adsorption layer, described adsorption layer comprises two-layer super fine denier electret meltblown fibers nonwoven layer 2, one deck polypropylene spunbond nonwoven layer 1 and layer of active carbon spongy layer 2, one deck polypropylene spunbond nonwoven layer 1 and layer of active carbon spongy layer 3 are clipped between two-layer super fine denier electret meltblown fibers nonwoven layer 2, gauze layer 4 is close to the wherein outside of one deck super fine denier electret meltblown fibers nonwoven layer 2, viscose bar is attached on the periphery in other one deck super fine denier electret meltblown fibers nonwoven layer outside 2, in described polypropylene spunbond nonwoven layer 1, be evenly equipped with small ventilating holes, small ventilating holes runs through polypropylene spunbond nonwoven layer, the aperture of small ventilating holes is 0.4mm, in every square meter polypropylene spunbond nonwoven layer, the quantity of small ventilating holes is 90,000.Super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 40g/m
2, thickness is 0.3mm, polypropylene spunbond nonwoven layer 1 weight per unit area is 20g/m
2, thickness is 0.4mm.
Comparative example
PM as described in Example 1
2.5protection composite window screen net, difference is,
Comparative example 1: super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 10g/m
2.
Comparative example 2: super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 15g/m
2.
Comparative example 3: super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 70g/m
2.
Comparative example 4: super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 80g/m
2.
Comparative example 5: super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 90g/m
2.
Comparative example 6: super fine denier electret meltblown fibers nonwoven layer 2 weight per unit areas are 100g/m
2.
About each screen of screen window of above-described embodiment 1～8 and comparative example 1～6 to PM2.5 filter efficiency with reference to Fig. 5.
Experimental example
By above-described embodiment 1～embodiment 5, totally 11 screen of screen windows of comparative example 1～comparative example 6 is placed in the performance evaluation of testing its filtration PM2.5 under the same terms, when carrying out this evaluation, each screen of screen window of the above embodiments 1～6 and comparative example 1～6 is placed in to the atmospheric environment that PM2.5 concentration is identical, under 25 ℃ of conditions of room temperature, all through the ventilation of 2～3min, guarantee Measurement sensibility in advance, again through the measuring of 1 hour, utilize existing AM510pm2.5 tester, under above-mentioned identical rated condition, measure respectively through embodiment 1～embodiment 6, the PM2.5 concentration of comparative example 1～comparative example 6 screen of screen windows, PM2.5 concentration after screen window net filtration is compared with the PM2.5 concentration before filtration, be the PM2.5 filter efficiency of screen of screen window, get again the average in this period, be the PM2.5 average filtration efficiency of screen of screen window.
PM2.5 concentration before the PM2.5 concentration/filtration of PM2.5 filter efficiency=after screen window net filtration
PM2.5 filter efficiency after above-described embodiment 1～embodiment 6, comparative example 1～comparative example 6 are processed is made a contrast test table, and comparing result sees the following form 1:
The weight of table 1 super fine denier electret meltblown fibers nonwoven layer is to PM
2.
5the impact of filter efficiency
Conclusion: by the data in table 1 to finding out, PM of the present invention
2.5the weight of the unit area of the super fine denier electret meltblown fibers nonwoven layer of protection composite window screen net is to PM
2.5the impact of filter efficiency is larger, along with the increase of the weight per unit area of super fine denier electret meltblown fibers nonwoven layer, PM
2.5filter efficiency increases gradually, when the weight of super fine denier electret meltblown fibers nonwoven layer reaches 40gm
-2time, PM
2.5filter efficiency reaches 99.75%, when super fine denier electret meltblown fibers nonwoven layer weight per unit area is less than 20g/m
2time, PM
2.5the PM of protection composite window screen net
2.5filter efficiency is obviously low, along with super fine denier electret meltblown fibers nonwoven layer weight per unit area increases gradually, and PM
2.5the PM of protection composite window screen net
2.5filter efficiency increases gradually, when thin dawn electret meltblown fibers nonwoven layer weight per unit area reaches 40g/m
2time, along with the increase of unit area grammes per square metre, PM
2.5the PM of protection composite window screen net
2.5filter efficiency is than grammes per square metre 40g/m
2filter efficiency remains basically stable, but along with the increase of super fine denier electret meltblown fibers nonwoven layer weight per unit area, PM
2.5the gas permeability of protection composite window screen net, light transmission more and more a little less than, weight increases the weight of gradually, cost also increases gradually, the present invention, by selecting rightly the weight per unit area of super fine denier electret meltblown fibers nonwoven layer, can have PM concurrently high-levelly
2.5gas permeability, light transmission, weight, the high efficiency PM of protection composite window screen net
2.5filter efficiency and manufacturing cost, be controlled at 25～50g/m by super fine denier electret meltblown fibers nonwoven layer weight per unit area
2, optimal case, super fine denier electret meltblown fibers nonwoven layer weight per unit area is controlled at 40g/m
2.
Claims (9)
1. a PM
2.5protection composite window screen net, described composite window screen net comprises warp layer stratum reticulare, it is characterized in that, a side at gauze layer is provided with adsorption layer, the one side of adsorption layer is close to gauze layer, the periphery of another side is provided with viscose bar, described adsorption layer at least comprises polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer, in described polypropylene spunbond nonwoven layer, be evenly equipped with small ventilating holes, small ventilating holes runs through polypropylene spunbond nonwoven layer, the aperture of small ventilating holes is 0.3～0.6mm, described super fine denier electret meltblown fibers nonwoven layer weight per unit area is 25～50g/m
2, polypropylene spunbond nonwoven layer weight per unit area is 15～25g/m
2.
2. PM according to claim 1
2.5protection composite window screen net, it is characterized in that, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer and one deck super fine denier electret meltblown fibers nonwoven layer, one side and the gauze layer of described polypropylene spunbond nonwoven layer are close to, opposite side and super fine denier electret meltblown fibers nonwoven layer are close to, and viscose bar is attached on the periphery in super fine denier electret meltblown fibers nonwoven layer outside.Super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm.
3. PM according to claim 1
2.5protection composite window screen net, it is characterized in that, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer and two-layer super fine denier electret meltblown fibers nonwoven layer, polypropylene spunbond nonwoven layer is clipped between two-layer super fine denier electret meltblown fibers nonwoven layer, gauze layer is close to the wherein outside of one deck super fine denier electret meltblown fibers nonwoven layer, viscose bar is attached on the periphery in other one deck super fine denier electret meltblown fibers nonwoven layer outside, and super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm.
4. PM according to claim 1
2.5protection composite window screen net, it is characterized in that, described adsorption layer comprises one deck polypropylene spunbond nonwoven layer, one deck super fine denier electret meltblown fibers nonwoven layer and layer of active carbon spongy layer, super fine denier electret meltblown fibers nonwoven layer is clipped between one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer, gauze layer is close to the outside of active carbon spongy layer, viscose bar is attached on the periphery in polypropylene spunbond nonwoven layer outside, and super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm, the thickness of active carbon spongy layer is 0.4mm～0.6mm.
5. PM according to claim 1
2.5protection composite window screen net, it is characterized in that, described adsorption layer comprises two-layer super fine denier electret meltblown fibers nonwoven layer, one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer, one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer are clipped between two-layer super fine denier electret meltblown fibers nonwoven layer, gauze layer is close to the wherein outside of one deck super fine denier electret meltblown fibers nonwoven layer, viscose bar is attached on the periphery in other one deck super fine denier electret meltblown fibers nonwoven layer outside, super fine denier electret meltblown fibers nonwoven layer weight per unit area is 30～40g/m
2, thickness is 0.2～0.4mm, the weight per unit area of polypropylene spunbond nonwoven layer is 18～20g/m
2, thickness is 0.4mm～0.6mm, the thickness of active carbon spongy layer is 0.4mm～0.6mm.
6. according to the PM described in claim 2-5 any one
2.5protection composite window screen net, is characterized in that, the weight per unit area of polypropylene spunbond nonwoven layer is 20g/m
2, super fine denier electret meltblown fibers nonwoven layer weight per unit area is 40g/m
2, preferably, the weight per unit area of polypropylene spunbond nonwoven layer is 20g/m
2, super fine denier electret meltblown fibers nonwoven layer weight per unit area is 35g/m
2.
7. PM according to claim 1
2.5protection composite window screen net, is characterized in that, in every square meter polypropylene spunbond nonwoven layer, the quantity of small ventilating holes is 8～120,000, and described gauze layer is 500 order-1500 object gauzes.
8. a PM claimed in claim 1
2.5the preparation method of protection composite window screen net, step is as follows:
In order gauze layer, adsorption layer are stacked and be close together, utilize hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together, the temperature of described hot pressing is 80-150 ℃, pressing pressure 4.9-25Mpa, when adsorption layer comprises one deck polypropylene spunbond nonwoven layer and one deck super fine denier electret meltblown fibers nonwoven layer, in order gauze layer, polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together; When adsorption layer comprises one deck polypropylene spunbond nonwoven layer and two-layer super fine denier electret meltblown fibers nonwoven layer, in order gauze layer, super fine denier electret meltblown fibers nonwoven layer, polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together; When adsorption layer comprises one deck polypropylene spunbond nonwoven layer, one deck super fine denier electret meltblown fibers nonwoven layer and layer of active carbon spongy layer, in order gauze layer, active carbon spongy layer, super fine denier electret meltblown fibers nonwoven layer and polypropylene spunbond nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together; When adsorption layer comprises two-layer super fine denier electret meltblown fibers nonwoven layer, one deck polypropylene spunbond nonwoven layer and layer of active carbon spongy layer, in order gauze layer, super fine denier electret meltblown fibers nonwoven layer, active carbon spongy layer, polypropylene spunbond nonwoven layer and super fine denier electret meltblown fibers nonwoven layer stacked and be close together, utilizing hot-pressing technique that the periphery of gauze layer, adsorption layer is pressed together.
9. a PM claimed in claim 1
2.5the application of protection composite window screen net, during use, by gauze layer toward the outer side, adsorption layer is towards screen window gauze, thereby the viscose bar of adsorption layer periphery is sticked on to window screen, on the net PM2.5 is protected to composite window screen net to be fixed on existing window screen online, described screen window gauze is glass fiber mesh, polyester gauze or stainless steel gauze.
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