CN212549053U - Covering device of high-air-permeability air purification composite membrane - Google Patents
Covering device of high-air-permeability air purification composite membrane Download PDFInfo
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- CN212549053U CN212549053U CN202021966273.9U CN202021966273U CN212549053U CN 212549053 U CN212549053 U CN 212549053U CN 202021966273 U CN202021966273 U CN 202021966273U CN 212549053 U CN212549053 U CN 212549053U
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Abstract
The utility model provides a cladding device of high air permeability air purification complex film, includes first non-woven fabrics blowing roller, nanofiber membrane blowing roller, second non-woven fabrics blowing roller, high temperature winding roller, pressure roller, air cooling device, tension adjusting roll, wind-up roll. The single-roller heating and pressure roller pressurizing mode is adopted in the laminating process, the laminating fastness of the nanofiber membrane and the non-woven fabric base material can be effectively enhanced, cold air is adopted for cooling immediately after laminating, and the situation that the low-melting-point fibers are continuously melted by waste heat and combined with the nanofiber membrane to damage a filtering pore channel can be prevented. The composite film material non-woven fabric substrate is filled with low-melting-point fibers at the laminating side, the low-melting-point fibers are melted after being heated by the hot roller, the nanofiber film is only bonded with the low-melting-point fibers, the main fibers of the substrate non-woven fabric are not melt bonded with the nanofiber film, a large number of gaps exist between the nanofiber film and the non-woven fabric substrate, the pore passages of the nanofiber film can be effectively prevented from being blocked and damaged, and the air permeability loss of the nanofiber film after being laminated is reduced.
Description
Technical Field
The utility model belongs to the technical field of air purification, especially, relate to a high air permeability air purification complex film cover and close device.
Background
With the rapid development of economy, the living standard of people is greatly improved, but the economic development brings very serious environmental problems, and the concentration of particulate matters in the air is greatly increased due to a large amount of residues discharged by combustion in the processes of industrial production, daily power generation, automobile exhaust emission and the like and various natural disasters such as volcanic eruption and the like, particularly PM2.5 particles (extremely fine particulate matters with the diameter of less than 2.5 microns in the air) have important influence on the air quality, the visibility and the like. Compared with the thicker atmospheric particulates, the fine particulates have small particle size, are rich in a large amount of toxic and harmful substances, have long retention time in the atmosphere and long conveying distance, and have larger influence on the human health and the atmospheric environmental quality. Studies have shown that smaller particles are more harmful to human health. The fine particles can drift to a far place, so the influence range is larger.
Air purification products and personal protection products become essential protective articles in people's daily life, and the air purification products include air purifier, new trend clarification plant etc. and have the domestic appliance equipment of the effect of getting rid of pollutant such as PM2.5, bacterium, virus in the air, and personal protective articles mainly refer to products such as gauze mask, protective clothing. The filtering material is the core of the equipment and plays a role in removing pollutants such as particulate matters, bacteria, viruses and the like, most of the currently used filtering materials are melt-blown materials, the fiber diameter is 1-10 mu m, the average pore diameter is 5-20 mu m, and in order to effectively remove fine particles such as PM2.5 and the like, the melt-blown materials are required to be filled with static electricity, and the pollutants are removed by the adsorption effect of the static electricity. However, the charged static electricity is easily neutralized and rapidly disappears during use, resulting in rapid decrease in the efficiency of the filter material.
Reduce filter material fiber diameter to nanometer level, can effectively reduce filter material's aperture, improve filter material's efficiency, but filter material resistance can obviously increase, in order to reduce filter resistance, needs corresponding reduction filter material thickness, processes filter material into film material promptly nanofiber membrane. The thickness of the nanofiber membrane is only 1-5 mu m, the nanofiber membrane cannot be directly used, the nanofiber membrane needs to be compounded on other large-aperture base materials, the processing strength is improved, most of the existing laminating methods are thermal compounding, namely, the base material fibers are heated to a molten state, the nanofiber membrane is tightly attached to the base materials by applying pressure, the air vent structure of the nanofiber membrane after attachment is blocked and damaged, the air vent loss is large, and the air vent structure is only 1/10-1/5 before lamination, so that the use of the nanofiber membrane is seriously influenced.
Disclosure of Invention
In order to solve the technical problem, the utility model discloses a high air permeability air purification complex film cover and close device and complex film, when reinforcing nanofiber membrane intensity, can effectively reduce the nanofiber membrane and cover the ventilative volume loss of closing the back, improve the ventilative volume of complex film material.
The technical scheme of the utility model:
the high-air-permeability air purification composite membrane covering device comprises a first non-woven fabric discharging roller, a nanofiber membrane discharging roller, a second non-woven fabric discharging roller, a high-temperature winding roller, a pressure roller, an air cooling device, a tension adjusting roller and a winding roller, wherein the first non-woven fabric discharging roller, the nanofiber membrane discharging roller and the second non-woven fabric discharging roller are located on the same side of the high-temperature winding roller and are arranged up and down, the nanofiber membrane discharging roller is located between the first non-woven fabric discharging roller and the second non-woven fabric discharging roller, the pressure roller is located on the upper portion of the high-temperature winding roller, a gap between the two rollers is 10 mu m-0.5mm, the tension adjusting roller is located on the lower portion of the high-temperature winding roller, the air cooling device is located between the high-temperature winding roller and the tension adjusting roller, and the winding roller is located on one.
Furthermore, the high-temperature winding roller is made of stainless steel, the pressure roller is made of high-temperature-resistant rubber or plastic, the high-temperature winding roller is provided with a rotating speed adjusting device, and the pressure roller is a driven roller.
Furthermore, the air outlet temperature of the air cooling device is 25-50 ℃, and the width of the air outlet section is 0.5-2 m.
The high-air-permeability air purification composite membrane prepared by the device comprises a non-woven fabric base material and a nanofiber membrane, wherein the non-woven fabric base material is formed by mixing one side of a main fiber with a low-melting-point fiber material, the low-melting-point fiber material is a laminating side, and the nanofiber membrane and the non-woven fabric base material are laminated and thermally pressed and compounded.
Further, the non-woven fabric base material is spun-bonded cloth, needle-punched cloth, spunlaced cloth or melt-blown cloth, is made of a fiber combination of different melting point materials of PP, PET, PPS, PI, PA, PES, EVA, TPU, PO and PTFE, and has a gram weight of 6-100g/m2The thickness is 10-500 μm, the low-melting-point fiber material accounts for 1-80% of the composite side, the nanofiber membrane material is PTFE, PP and PET, and the gram weight is 0.5-10g/m2The thickness is 1-5 μm, the average pore diameter is 0.1-3 μm, and the fiber diameter is 50-1000 nm.
Furthermore, both sides of the nanofiber membrane are coated with the non-woven fabric base material.
Specifically, the use process of the high-air-permeability air purification composite membrane device comprises the following steps:
step a: preparing a base material non-woven fabric, namely pre-forming a web of base material main fibers by adopting a needling, spun-bonding, spunlace or melt-blowing mode, mixing low-melting-point fibers on the pre-formed web, fully combining the low-melting-point fibers and the main fibers by adopting the needling, spun-bonding, spunlace or melt-blowing mode, and then carrying out single-side hot rolling and shaping on the main fiber side;
step b: preparing a nanofiber membrane, namely preparing the nanofiber membrane by adopting a two-way stretching, electrostatic spinning or melt-blowing mode and rolling;
step c: arranging the prepared base material non-woven fabric on a non-woven fabric discharging roller, arranging the nanofiber membrane on a nanofiber membrane discharging roller, wherein the laminating side of the non-woven fabric base material is opposite to the nanofiber membrane, and the base material non-woven fabric and the nanofiber membrane pass through a high-temperature winding roller together and pass through a tension sheet; the tension is adjusted by the force adjusting roller, and the wind is wound on the winding roller after wind cooling.
Furthermore, the single-side hot rolling setting temperature in the step a is 80-260 ℃, and the air cooling is rapidly carried out after the setting.
Furthermore, the winding tension of the nanofiber membrane in the step b is 0.1-10N.
Furthermore, in the step c, the temperature of the high-temperature winding roller is 70-200 ℃, the pressure between the pressure roller and the high-temperature winding roller is 0-1MPa, the speed of the high-temperature winding roller is 0.3-10m/min, the wrap angle of the non-woven fabric base material on the high-temperature winding roller is 30-180 degrees, and the tension of the composite film is 0.5-50N.
Has the advantages that: the utility model discloses the device covers and closes the in-process and adopts the single roll heating, and the fastness that closes can effectively be strengthened nanofiber membrane and non-woven fabrics substrate cover to the pressurization mode, adopts cold wind cooling immediately after covering to close, can prevent that the waste heat from making low melting point fibre continue the melting and combine each other with the nanofiber membrane and destroy the filtration pore, increase the filtration resistance. The composite film material non-woven fabric substrate is filled with low-melting-point fibers at the laminating side, the low-melting-point fibers are melted after being heated by the hot roller, the nanofiber film is only bonded with the low-melting-point fibers, the main fibers of the substrate non-woven fabric are not melt bonded with the nanofiber film, a large number of gaps exist between the nanofiber film and the non-woven fabric substrate, the pore passages of the nanofiber film can be effectively prevented from being blocked and damaged, and the air permeability loss of the nanofiber film after being laminated is reduced.
Drawings
Fig. 1 is a schematic view of the cross-sectional structure of the non-woven fabric substrate of the present invention.
Fig. 2 is an electron microscope photograph of the non-woven fabric surface of the present invention.
Fig. 3 is a schematic structural view of the single-layer non-woven fabric substrate composite film of the present invention.
FIG. 4 is a side electron microscope photograph of the single-layer nonwoven fabric substrate composite film of the present invention.
Fig. 5 is a schematic structural view of the double-layer non-woven fabric substrate composite film of the present invention.
Fig. 6 is a schematic view of the laminating apparatus of the present invention.
Wherein: 1-first nonwoven fabric feeding roller, 2-nanofiber membrane feeding roller, 3-second nonwoven fabric feeding roller, 4-upper nonwoven fabric substrate, 401-primary fiber, 402-low melting point fiber, 5-nanofiber membrane, 6-lower nonwoven fabric substrate, 7-high temperature winding roller, 8-pressure roller, 9-air cooling device, 10-tension adjusting roller, 11-composite film, 1101-upper nonwoven fabric substrate primary fiber side, 1102-upper nonwoven fabric substrate laminating side, 1103-composite film nanofiber membrane layer, 1104-lower nonwoven fabric substrate primary fiber side, 1105-lower nonwoven fabric substrate laminating side, 12-wind-up roller.
Detailed Description
Example 1
A high air permeability air purification composite membrane 11, as shown in figure 4, comprises an upper non-woven fabric substrate layer and a composite membrane nanofiber membrane layer 1103, wherein the upper non-woven fabric substrate layer is an upper non-woven fabric substrate composite side 1102 close to the composite membrane nanofiber membrane layer 1103, the other side is an upper non-woven fabric substrate main fiber side 1101, the used non-woven fabric substrate main fiber 401 is PET, the melting point is 250 ℃, the low melting point fiber 402 is PA, the melting point is 125 ℃, the non-woven fabric substrate adopts a needling process, the PA fiber content of the composite side is 1%, and the gram weight of the non-woven fabric substrate is 6g/m2The thickness is 10 mu m, the nano-fiber membrane is made of PTFE by biaxial tension, and the gram weight is 0.5g/m2Thickness 1 μm, mean pore diameter 3 μm, fiber diameter 50 nm.
The high-air-permeability air purification composite film covering device comprises a first non-woven fabric discharging roller 1, a nanofiber film discharging roller 2, a second non-woven fabric discharging roller 3, a high-temperature winding roller 7, a pressure roller 8, an air cooling device 9, a tension adjusting roller 10, a winding roller 12, wherein the first non-woven fabric discharging roller 1, the nanofiber film discharging roller 2 and the second non-woven fabric discharging roller 3 are located on the same side of the high-temperature winding roller 7 and are arranged up and down, the nanofiber film discharging roller 2 is located between the first non-woven fabric discharging roller 1 and the second non-woven fabric discharging roller 3, the pressure roller 8 is located above the high-temperature winding roller 7, a gap between the two rollers is 10 mu m, the tension adjusting roller 10 is located below the high-temperature winding roller 7, the air cooling device 9 is located between the high-temperature winding roller 7 and the tension adjusting roller 10, and the winding roller 12 is located on one side of the tension adjusting roller 10.
The high-temperature winding roller 7 is made of stainless steel, the pressure roller 8 is made of high-temperature-resistant rubber or plastic, the high-temperature winding roller 7 is provided with a rotating speed adjusting device, and the pressure roller 8 is a driven roller. The air-out temperature of the air-cooling device is 25 ℃, and the width of the air-out section is 0.5 m.
The preparation method of the high-air-permeability air purification composite membrane comprises the following steps:
step a: preparing an upper non-woven fabric substrate 4, pre-forming a web of substrate main fibers 401 by adopting a needling mode, mixing low-melting-point fibers 402 (PA) on the surface of the pre-formed web, fully combining the PA low-melting-point fibers 402 with the PET main fibers 401 by adopting the needling mode, then carrying out single-side hot rolling shaping on the PET main fibers 401 side, wherein the single-side hot rolling shaping temperature is 240 ℃, and rapidly cooling by air after shaping.
Step b: and (3) preparing a nanofiber membrane 5, namely preparing the PTFE nanofiber membrane in a bidirectional stretching mode, rolling, and keeping the rolling tension at 0.1N.
Step c: placing the prepared upper non-woven fabric substrate 4 in a first non-woven fabric discharging roller 1, placing the nanofiber membrane in a nanofiber membrane discharging roller 2, enabling the covered side of the upper non-woven fabric substrate 4 to be opposite to the nanofiber membrane 5, enabling the upper non-woven fabric substrate 4 and the nanofiber membrane 5 to pass through a high-temperature winding roller 7 together, obtaining a composite membrane 11 through hot-pressing compounding, cooling the composite membrane 11 through an air cooling device 9, adjusting the tension through a tension adjusting roller 10, and then winding the composite membrane on a winding roller 12. The temperature of the high-temperature winding roller 7 is 130 ℃, the pressure between the pressure roller 8 and the high-temperature winding roller 7 is 0MPa, the speed of the high-temperature winding roller 7 is 0.3m/min, the wrap angle of the upper non-woven fabric base material 4 on the high-temperature winding roller 7 is 30 degrees, and the tension of the composite film 11 is 0.5N. In the surface electron micrograph of the nonwoven fabric shown in FIG. 2, the thick bulk fibers are low-melting-point fibers on the coated side. Fig. 4 is an electron microscope photograph of the single-layer nonwoven fabric substrate composite film, in which the massive coarse fibers at the bottom of the nanofiber membrane material are low-melting-point fibers coated with the nanofiber membrane.
The air permeability of the high-permeability air purification composite membrane prepared by the embodiment can reach 10m/min @200Pa, and compared with a composite membrane material prepared by hot-pressing and laminating a traditional single-component non-woven fabric substrate, the air permeability can be improved by 1 time.
Example 2
The high-air-permeability air purification composite membrane 11 comprises an upper non-woven fabric substrate layer, a lower non-woven fabric substrate layer and a composite membrane nanofiber membrane layer 1103, wherein the upper non-woven fabric substrate layer is an upper non-woven fabric substrate laminating side 1102 close to the composite membrane nanofiber membrane layer 1103, the other side is an upper non-woven fabric substrate main fiber side 1101, the lower non-woven fabric substrate layer is a lower non-woven fabric substrate laminating side 1105 close to the composite membrane nanofiber membrane layer 1103, and the other side is a lower non-woven fabric substrate main fiber side 1104.
The used main fiber 401 of the non-woven fabric base material is PP, the melting point is 150 ℃, the low-melting-point fiber 402 is TPU, the melting point is 80 ℃, the non-woven fabric base material adopts a spinning and bonding process, the content of TPU fiber on the clad side is 80%, and the gram weight of the non-woven fabric base material is 100g/m2The thickness is 500 mu m, the nano-fiber film material is made of PET electrostatic spinning, the gram weight is 10g/m2Thickness 5 μm, mean pore diameter 0.1 μm, fiber diameter 1000 nm.
High air permeability air purification complex film covers closes device, including first non-woven fabrics blowing roll 1, nanofiber membrane blowing roll 2, second non-woven fabrics blowing roll 3, high temperature winding roller 7, pressure roller 8, air cooling device 9, tension adjusting roller 10, wind-up roll 12, first non-woven fabrics blowing roll 1, nanofiber membrane blowing roll 2, second non-woven fabrics blowing roll 3 are located high temperature winding roller 7 homonymy, and arrange from top to bottom, and nanofiber membrane blowing roll 2 is located between first non-woven fabrics blowing roll 1 and second non-woven fabrics blowing roll 3, and pressure roller 8 is located high temperature winding roller 7 upper portion, and the clearance 0.5mm between the two rolls, tension adjusting roller 10 is located high temperature winding roller 7 lower part, and air cooling device 9 is located between high temperature winding roller 7 and tension adjusting roller 10, wind-up roll 12 is located tension adjusting roller 10 one side.
The high-temperature winding roller 7 is made of stainless steel, the pressure roller 8 is made of high-temperature-resistant rubber or plastic, the high-temperature winding roller 7 is provided with a rotating speed adjusting device, and the pressure roller 8 is a driven roller. The air-cooling device has the air outlet temperature of 50 ℃ and the air outlet section width of 2 m.
The preparation method of the high-air-permeability air purification composite membrane comprises the following steps:
step a: preparing an upper non-woven fabric substrate 4, preparing main fibers 401 from a PP material by adopting a spinning and sticking process, pre-forming a net, spinning and sticking mixed low-melting-point fibers 402 (TPU) on the surface of the pre-formed net, performing single-side hot rolling and shaping on the PP main fibers 401 side, wherein the single-side hot rolling and shaping temperature is 80 ℃, and rapidly cooling by air cooling after shaping.
Step b: preparing a nano fiber film 5, preparing a PET nano fiber film by adopting an electrostatic spinning method, rolling, and having a rolling tension of 10N.
Step c: the preparation method comprises the following steps of placing an upper non-woven fabric substrate 4 obtained through preparation in a first non-woven fabric discharging roller 1 and a second non-woven fabric discharging roller 3, placing a nanofiber membrane 5 in a nanofiber membrane discharging roller 2, enabling the covered side of the upper non-woven fabric substrate 4 and the covered side of a lower non-woven fabric substrate 6 to be opposite to the nanofiber membrane 5, enabling the upper non-woven fabric substrate 4, the lower non-woven fabric substrate 6 and the nanofiber membrane 5 to together pass through a high-temperature winding roller 7, obtaining a composite membrane 11 through hot-pressing compounding, enabling the composite membrane 11 to be cooled through an air cooling device 9, adjusting the tension through a tension adjusting roller 10, and then rolling through. The temperature of the high-temperature winding roller 7 is 130 ℃, the pressure between the pressure roller 8 and the high-temperature winding roller 7 is 1MPa, the speed of the high-temperature winding roller 7 is 10m/min, the wrap angles of the upper non-woven fabric base material 4, the lower non-woven fabric base material 6 and the nanofiber membrane 5 on the high-temperature winding roller 7 are 180 degrees, and the tension of the composite membrane 11 is 50N.
The air permeability of the high-permeability air purification composite membrane prepared by the embodiment can reach 8m/min @200Pa, and compared with a composite membrane material prepared by hot-pressing and laminating a traditional single-component non-woven fabric substrate, the air permeability of the high-permeability air purification composite membrane is 1.8 times that of the composite membrane material prepared by the traditional process.
Example 3
A high air permeability air purification composite membrane 11, as shown in figure 4, comprises an upper non-woven fabric substrate layer and a composite membrane nanofiber membrane layer 1103, wherein the upper non-woven fabric substrate layer is an upper non-woven fabric substrate laminating side 1102 close to the composite membrane nanofiber membrane layer 1103, the other side is an upper non-woven fabric substrate main fiber side 1101, the used non-woven fabric substrate main fiber 401 is PES, the melting point is 150 ℃, the low melting point fiber 402 is EVA, the melting point is 90 ℃, the non-woven fabric substrate adopts a spunlace process, the EVA fiber content of the laminating side is 15%, and the gram weight of the non-woven fabric substrate is 10g/m2The thickness is 50 mu m, the nano-fiber membrane is made of PP melt-blown, and the gram weight is 2g/m2Thickness 3 μm, mean pore diameter 2 μm, fiber diameter 100 nm.
The high-air-permeability air purification composite film covering device comprises a first non-woven fabric discharging roller 1, a nanofiber film discharging roller 2, a second non-woven fabric discharging roller 3, a high-temperature winding roller 7, a pressure roller 8, an air cooling device 9, a tension adjusting roller 10, a winding roller 12, wherein the first non-woven fabric discharging roller 1, the nanofiber film discharging roller 2 and the second non-woven fabric discharging roller 3 are located on the same side of the high-temperature winding roller 7 and are arranged up and down, the nanofiber film discharging roller 2 is located between the first non-woven fabric discharging roller 1 and the second non-woven fabric discharging roller 3, the pressure roller 8 is located on the upper portion of the high-temperature winding roller 7, a gap between the two rollers is 100 mu m, the tension adjusting roller 10 is located on the lower portion of the high-temperature winding roller 7, the air cooling device 9 is located between the high-temperature winding roller 7 and the tension adjusting roller 10, and the winding roller 12 is located on one side of.
The high-temperature winding roller 7 is made of stainless steel, the pressure roller 8 is made of high-temperature-resistant rubber or plastic, the high-temperature winding roller 7 is provided with a rotating speed adjusting device, and the pressure roller 8 is a driven roller. The air-out temperature of the air-cooling device is 25 ℃, and the width of the air-out section is 1 m.
The preparation method of the high-air-permeability air purification composite membrane comprises the following steps:
step a: preparing an upper non-woven fabric substrate 4, pre-forming a PES (polyether sulfone) main fiber 401 as a substrate by adopting a spunlace method, mixing an EVA (ethylene vinyl acetate) low-melting-point fiber 402 on the surface of the pre-formed web, fully combining the EVA low-melting-point fiber 402 and the PES main fiber 401 by adopting the spunlace method, performing single-side hot rolling and shaping on the PES main fiber 401 side, wherein the single-side hot rolling and shaping temperature is 140 ℃, and rapidly cooling by air after shaping.
Step b: preparing a nanofiber membrane 5, preparing a PP nanofiber membrane in a melt-blown mode, rolling, and rolling with tension of 5N.
Step c: placing the prepared upper non-woven fabric substrate 4 in a first non-woven fabric discharging roller 1, placing the nanofiber membrane in a nanofiber membrane discharging roller 2, enabling the covered side of the upper non-woven fabric substrate 4 to be opposite to the nanofiber membrane 5, enabling the upper non-woven fabric substrate 4 and the nanofiber membrane 5 to pass through a high-temperature winding roller 7 together, obtaining a composite membrane 11 through hot-pressing compounding, cooling the composite membrane 11 through an air cooling device 9, adjusting the tension through a tension adjusting roller 10, and then winding the composite membrane on a winding roller 12. The temperature of the high-temperature winding roller 7 is 95 ℃, the pressure between the pressure roller 8 and the high-temperature winding roller 7 is 0.5MPa, the speed of the high-temperature winding roller 7 is 5m/min, the wrap angle of the upper non-woven fabric base material 4 on the high-temperature winding roller 7 is 90 degrees, and the tension of the composite film 11 is 5N.
The air permeability of the high-permeability air purification composite membrane prepared by the embodiment can reach 12m/min @200Pa, and compared with a composite membrane material prepared by hot-pressing and laminating a traditional single-component non-woven fabric substrate, the air permeability can be improved by 1.2 times.
Example 4
The high-air-permeability air purification composite membrane 11 comprises an upper non-woven fabric substrate layer, a lower non-woven fabric substrate layer and a composite membrane nanofiber membrane layer 1103, wherein the upper non-woven fabric substrate layer is an upper non-woven fabric substrate laminating side 1102 close to the composite membrane nanofiber membrane layer 1103, the other side is an upper non-woven fabric substrate main fiber side 1101, the lower non-woven fabric substrate layer is a lower non-woven fabric substrate laminating side 1105 close to the composite membrane nanofiber membrane layer 1103, and the other side is a lower non-woven fabric substrate main fiber side 1104.
The main fiber 401 of the non-woven fabric base material is PTFE, the temperature resistance is 300 ℃, the low-melting-point fiber 402 is PES, the melting point is 150 ℃, the non-woven fabric base material is prepared by adopting a needling process, the content of PES fiber on the clad side is 50%, and the gram weight of the non-woven fabric base material is 80g/m2The thickness is 300 mu m, the nano-fiber membrane material is made of PES electrostatic spinning, and the gram weight is 5g/m2Thickness 3 μm, average pore diameter 0.5 μm, fiber diameter 200 nm.
High air permeability air purification complex film covers closes device, including first non-woven fabrics blowing roll 1, nanofiber membrane blowing roll 2, second non-woven fabrics blowing roll 3, high temperature winding roller 7, pressure roller 8, air cooling device 9, tension adjusting roller 10, wind-up roll 12, first non-woven fabrics blowing roll 1, nanofiber membrane blowing roll 2, second non-woven fabrics blowing roll 3 are located high temperature winding roller 7 homonymy, and arrange from top to bottom, and nanofiber membrane blowing roll 2 is located between first non-woven fabrics blowing roll 1 and second non-woven fabrics blowing roll 3, and pressure roller 8 is located high temperature winding roller 7 upper portion, and the clearance 0.5mm between the two rolls, tension adjusting roller 10 is located high temperature winding roller 7 lower part, and air cooling device 9 is located between high temperature winding roller 7 and tension adjusting roller 10, wind-up roll 12 is located tension adjusting roller 10 one side.
The high-temperature winding roller 7 is made of stainless steel, the pressure roller 8 is made of high-temperature-resistant rubber or plastic, the high-temperature winding roller 7 is provided with a rotating speed adjusting device, and the pressure roller 8 is a driven roller. The air-out temperature of the air-cooling device is 45 ℃, and the width of the air-out section is 1.5 m.
The preparation method of the high-air-permeability air purification composite membrane comprises the following steps:
step a: preparing an upper non-woven fabric substrate 4, pre-forming PTFE main fibers 401 into a net by adopting a needling process, mixing PES low-melting-point fibers 402 on the surface of the pre-formed net, then carrying out single-side hot rolling and shaping on the PTFE main fibers 401 side, wherein the single-side hot rolling and shaping temperature is 260 ℃, and rapidly cooling by air after shaping.
Step b: preparing a nanofiber membrane 5, preparing a PES nanofiber membrane by adopting an electrostatic spinning method, rolling, and rolling with tension of 8N.
Step c: the preparation method comprises the following steps of placing an upper non-woven fabric substrate 4 obtained through preparation in a first non-woven fabric discharging roller 1 and a second non-woven fabric discharging roller 3, placing a nanofiber membrane 5 in a nanofiber membrane discharging roller 2, enabling the covered side of the upper non-woven fabric substrate 4 and the covered side of a lower non-woven fabric substrate 6 to be opposite to the nanofiber membrane 5, enabling the upper non-woven fabric substrate 4, the lower non-woven fabric substrate 6 and the nanofiber membrane 5 to together pass through a high-temperature winding roller 7, obtaining a composite membrane 11 through hot-pressing compounding, enabling the composite membrane 11 to be cooled through an air cooling device 9, adjusting the tension through a tension adjusting roller 10, and then rolling through. The temperature of the high-temperature winding roller 7 is 130 ℃, the pressure between the pressure roller 8 and the high-temperature winding roller 7 is 0.3MPa, the speed of the high-temperature winding roller 7 is 5m/min, the wrap angles of the upper non-woven fabric base material 4, the lower non-woven fabric base material 6 and the nanofiber membrane 5 on the high-temperature winding roller 7 are 120 degrees, and the tension of the composite membrane 11 is 30N.
The air permeability of the high-permeability air purification composite membrane prepared by the embodiment can reach 16m/min @200Pa, and compared with a composite membrane material prepared by hot-pressing and laminating a traditional single-component non-woven fabric substrate, the air permeability of the high-permeability air purification composite membrane is 1.5 times that of the composite membrane material prepared by the traditional process.
Claims (3)
1. The covering device is characterized by comprising a first non-woven fabric discharging roller, a nanofiber membrane discharging roller, a second non-woven fabric discharging roller, a high-temperature winding roller, a pressure roller, an air cooling device, a tension adjusting roller and a winding roller, wherein the first non-woven fabric discharging roller, the nanofiber membrane discharging roller and the second non-woven fabric discharging roller are positioned on the same side of the high-temperature winding roller and are arranged up and down, the nanofiber membrane discharging roller is positioned between the first non-woven fabric discharging roller and the second non-woven fabric discharging roller, the pressure roller is positioned above the high-temperature winding roller, a gap between the two rollers is 10 mu m-0.5mm, the tension adjusting roller is positioned below the high-temperature winding roller, the air cooling device is positioned between the high-temperature winding roller and the tension adjusting roller, and the winding roller is positioned on one side of the tension adjusting roller.
2. The covering device for the air purifying composite film with high air permeability according to claim 1, wherein the high temperature winding roller is made of stainless steel, the pressure roller is made of high temperature resistant rubber or plastic, the high temperature winding roller is provided with a rotation speed adjusting device, and the pressure roller is a driven roller.
3. The covering device of the air purification composite membrane with high air permeability according to claim 1, wherein the air outlet temperature of the air cooling device is 25-50 ℃, and the air outlet cross section width is 0.5-2 m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021966273.9U CN212549053U (en) | 2020-09-09 | 2020-09-09 | Covering device of high-air-permeability air purification composite membrane |
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| CN202021966273.9U CN212549053U (en) | 2020-09-09 | 2020-09-09 | Covering device of high-air-permeability air purification composite membrane |
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| CN212549053U true CN212549053U (en) | 2021-02-19 |
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| CN111888947A (en) * | 2020-09-09 | 2020-11-06 | 江苏久朗高科技股份有限公司 | High-air-permeability air purification composite membrane, covering device and preparation method thereof |
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