CN212771077U - Preparation device of melt-blown non-woven fabric - Google Patents
Preparation device of melt-blown non-woven fabric Download PDFInfo
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- CN212771077U CN212771077U CN202020725748.9U CN202020725748U CN212771077U CN 212771077 U CN212771077 U CN 212771077U CN 202020725748 U CN202020725748 U CN 202020725748U CN 212771077 U CN212771077 U CN 212771077U
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Abstract
The utility model discloses a preparation facilities of melt-blown non-woven fabrics, include: the winding net curtain is stretched by a plurality of rollers and driven to circularly advance; a spinneret positioned above the winding screen and extending along the width direction of the winding screen for ejecting the melt of the polymer after melt extrusion and metering; the wind power traction device is arranged on the outlet side of the spinneret plate and is used for drawing the polymer sprayed by the melt to form filaments; the cooling device is used for cooling and solidifying the molten filaments and at least comprises a plurality of spraying systems arranged between the spinneret plate and the level of the winding screen; and the air suction device is arranged below the winding net curtain and is used for interweaving and adsorbing the filaments on the winding net curtain to form the non-woven fabric. The utility model has the advantages of accelerated cooling speed, faster fiber solidification speed, good fiber toughness and high fiber strength; the filtering resistance cannot be increased; a large amount of heat can be taken away while water mist evaporates, and double cooling effects are achieved.
Description
Technical Field
The utility model belongs to the technical field of separation and preparation facilities of filtering trade non-woven fabrics, especially, relate to a preparation facilities of melt-blown non-woven fabrics.
Background
Nonwoven materials are becoming an increasingly important filter material due to their excellent filtration properties, high throughput, simple processing, and the like. The melt-blown method is one of important methods for one-step forming of the non-woven fabric, and has the advantages of adjustable fiber fineness, disordered and fluffy three-dimensional structure, good filtering efficiency, high production efficiency and the like, so the melt-blown method plays a great role in the fields of food chemical industry, medical treatment and health, environmental protection, microelectronic industry and the like.
In the traditional melt-blowing process, cold air flow is adopted to cool the solution, namely, the cooling air rapidly cools and solidifies the fiber in the filamentation process. However, the cooling effect of the cold air flow is not good, if the temperature of the air flow is too high, the cooling of the fibers is affected, the bonding degree of the fibers on the receiving net curtain is too high, the structure is too compact, the porosity is too small, the filtering resistance is increased when the melt-blown non-woven fabric is used as a filtering medium, and the filtering efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides an utilize spraying system to cool off the fibre, the cooling effect is good, and fibre solidification speed is faster, and fibre toughness is good, the preparation facilities of the high melt-blown non-woven fabrics of intensity.
The utility model provides a technical scheme that its technical problem adopted is: a preparation device of melt-blown non-woven fabric is characterized by comprising:
the winding net curtain is stretched by a plurality of rollers and driven to circularly advance;
a spinneret positioned above the winding screen and extending along the width direction of the winding screen for ejecting the melt of the polymer after melt extrusion and metering;
the wind power traction device is arranged on the outlet side of the spinneret plate and is used for drawing the polymer sprayed by the melt to form filaments;
the cooling device is used for cooling and solidifying the molten filaments and at least comprises a plurality of spraying systems arranged between the spinneret plate and the level of the winding screen;
and the air suction device is arranged below the winding net curtain and is used for interweaving and adsorbing the filaments on the winding net curtain to form the non-woven fabric.
Further, the spraying systems are arranged in parallel and at intervals along the width direction of the winding net curtain, and the spraying areas of the adjacent spraying systems are provided with cross areas. The arrangement of the cross region enables the water vapor with lower content at two sides of the spraying system to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, and the mixture extending along the width direction of the winding net curtain is cooled more uniformly and effectively, so that the melt-blown non-woven fabric with stable performance in the transverse direction and the longitudinal direction is achieved.
Furthermore, the cooling device also comprises a water supply system, a constant temperature system for keeping the temperature of water in the water supply system constant, and an air supply system. The air supply system is used for uniformly and powerfully spraying constant-temperature liquid, so that the cooling effect of the spraying system is ensured, and the constant-temperature system ensures that the spraying is in a low-temperature state.
Furthermore, the air suction device at least comprises a main air suction mechanism arranged right below the spinneret plate and a first auxiliary air suction mechanism positioned at the upstream of the main air suction mechanism; the projection of the spraying system in the vertical direction is positioned at the upstream of the first auxiliary air suction mechanism. First supplementary mechanism of induced drafting can effectively avoid the hybrid fiber whereabouts to the coiling screen curtain upper surface when, upwards the bounce-back causes the interference to spraying system, guarantees spraying system spun atomizing steam's stability, guarantees the homogeneity of non-woven fabrics in horizontal, and then guarantees the stability of final product.
Further, the air suction device further comprises a second auxiliary air suction mechanism positioned at the downstream of the main air suction mechanism.
Furthermore, the dust collector is positioned at the downstream of the winding net curtain and is used for removing the free flying dust adsorbed on the surface of the non-woven fabric. The dust collector can remove free fly adsorbed on the surface of the non-woven fabric and can improve the filtering performance of the non-woven fabric
Further, the water temperature of the water supply system is constant at 15-30 ℃, the spraying flow of the spraying system is 80-500ml/min, the spraying pressure of the spraying system is 0.2-0.5MPa, and the center distance between a spray head of the spraying system and a spinneret plate is 30-40 cm.
Further, the distance between the spinneret plate and the winding net curtain is 50-200 mm; the spinneret plate is provided with a plurality of spray holes with the same aperture, and the yield of the single spray hole on the spinneret plate is 0.05-0.5 g/min.
Furthermore, the length of the spinneret plate is 1000-.
Further, the polymer is melt extruded through an extruder, the heating temperature of the extruder is 170-330 ℃, the temperature of a spinneret plate is 190-330 ℃, and the flow rate of the molten blend in the spinneret plate is 0.05-0.5 ghm.
Furthermore, the hot air volume of the air knife traction device is 18-25m3Min, the air knife clearance of the air knife traction device is 0.5-1.0mm, the receiving height is 50-200mm, the temperature of hot air generated by the air knife is 200-320 ℃, and the pressure of the hot air is 25-200 KPa.
Furthermore, a metering pump for metering the polymer is arranged above the spinneret plate, and the flow rate of the metering pump is 250-350 ml/min.
The utility model has the advantages that: 1) compared with gas cooling, the heat capacity of the steam contacting the fiber and the steam-containing gas flow is greatly improved, and the steam and the fiber have larger temperature difference to finish quick heat exchange, so that the toughness, strength and the like of the fiber are improved due to the fact that the fiber is cooled at a high speed and the crystallization of the fiber is relatively incomplete; 2) the porosity is kept in a normal range, and the filtration resistance is not increased; 3) a large amount of heat can be taken away while the water mist is evaporated, and a double cooling effect is achieved; 4) the number of the spinneret plates is reduced by only arranging one spinneret plate, so that the production cost is reduced; 5) the energy consumption for processing is reduced.
Drawings
FIG. 1 is a schematic view of the apparatus for preparing meltblown nonwoven fabric according to the present invention.
Fig. 2 is a schematic view of a part of the melt-blown nonwoven fabric manufacturing apparatus according to the present invention.
Fig. 3 is a schematic cross-sectional view of a plurality of spraying areas of the spraying system provided by the present invention.
The device comprises a winding screen 1, a winding roller 2, a spinneret plate 3, a fiber 31, an extruder 4, a charging barrel 41, a metering pump 5, a filter 51, a wind power traction device 6, an air compressor 61, a hot air tank 62, a cooling device 7, a water supply system 71, a liquid control valve 711, a thermostatic system 72, an air supply system 73, an air flow control valve 731, an air flow control valve 74, a spraying system 741, atomized water vapor 742, a spraying system adjusting mechanism 742, a cross area 75, an 8-air suction device 81, a main air suction mechanism 82, a first auxiliary air suction mechanism 83, a second auxiliary air suction mechanism 9 and a dust suction device.
Detailed Description
In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced;
the length of the spinneret plate 3 is 1000mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2500, the aperture of each spray hole is 0.15mm, the length-diameter ratio of each spray hole is 20, the hole spacing of each spray hole is 0.3mm, and the yield of each spray hole is 0.05 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 285 deg.C, 280 deg.C, 278 deg.C, 280 deg.C, 285 deg.C, respectively, and the flow rate of the molten blend at the spinneret 3 is 0.06 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 180 ℃, 220 ℃, 250 ℃, 280 ℃ and 280 ℃ in sequence along the advancing direction, metering and conveying the blend melt by a metering pump 5 to be uniformly distributed on a spinneret plate 3 after screw extrusion, and the flow of the metering pump 5 is 280 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 0.7mm, the receiving height is 60mm, the temperature of hot air generated by the air knife is 295 ℃, the pressure of the hot air is 110kPa, and the air volume of the hot air is 20m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 19-20 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 100ml/min, the spraying pressure of the spraying system 74 is 0.3MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 35cm, the height distance between the nozzle of the spraying system 74 and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees. The center distance between the nozzle of the spraying system 74 and the spinneret plate 3 is the distance between the nozzle of the spraying system 74 and the vertical line by making the vertical line through the spray hole of the spinneret plate 3;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the heat capacity of the water vapor contacting the fibers and the gas flow containing the water vapor is greatly improved, and the heat capacity of the gas flow containing the water vapor is greatly improved, so that the fiber has a larger temperature difference with the fibers to finish quick heat exchange, further, as the cooling speed of the fibers is high, the crystallization of the fibers is relatively incomplete, the toughness, the strength and the like of the fibers are also improved, and meanwhile, the energy consumption of the processing technology is also reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 2
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced;
the length of the spinneret plate 3 is 1000mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2500, the aperture of each spray hole is 0.15mm, the length-diameter ratio of each spray hole is 20, the hole spacing of each spray hole is 0.3mm, and the yield of each spray hole is 0.05 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 285 deg.C, 280 deg.C, 278 deg.C, 280 deg.C, 285 deg.C, respectively, and the flow rate of the molten blend at the spinneret 3 is 0.06 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 180 ℃, 220 ℃, 250 ℃, 280 ℃ and 280 ℃ in sequence along the advancing direction, metering and conveying the blend melt by a metering pump 5 to be uniformly distributed on a spinneret plate 3 after screw extrusion, and the flow of the metering pump 5 is 280 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 0.7mm, the receiving height is 60mm, the temperature of hot air generated by the air knife is 295 ℃, the pressure of the hot air is 110kPa, and the air volume of the hot air is 20m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 19-20 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 100ml/min, the spraying pressure of the spraying system 74 is 0.3MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 35cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 3
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced;
the length of the spinneret plate 3 is 1000mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2500, the aperture of each spray hole is 0.15mm, the length-diameter ratio of each spray hole is 20, the hole spacing of each spray hole is 0.3mm, and the yield of each spray hole is 0.05 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 285 deg.C, 280 deg.C, 278 deg.C, 280 deg.C, 285 deg.C, respectively, and the flow rate of the molten blend at the spinneret 3 is 0.06 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 180 ℃, 220 ℃, 250 ℃, 280 ℃ and 280 ℃ in sequence along the advancing direction, metering and conveying the blend melt by a metering pump 5 to be uniformly distributed on a spinneret plate 3 after screw extrusion, and the flow of the metering pump 5 is 280 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 0.7mm, the receiving height is 60mm, the temperature of hot air generated by the air knife is 295 ℃, the pressure of the hot air is 110kPa, and the air volume of the hot air is 20m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 19-20 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 100ml/min, the spraying pressure of the spraying system 74 is 0.3MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 35cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 4
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced;
the length of the spinneret plate 3 is 1000mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2500, the aperture of each spray hole is 0.15mm, the length-diameter ratio of each spray hole is 15, the hole spacing of each spray hole is 0.3mm, and the yield of each spray hole is 0.05 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 285 deg.C, 280 deg.C, 278 deg.C, 280 deg.C, 285 deg.C, respectively, and the flow rate of the molten blend at the spinneret 3 is 0.06 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 180 ℃, 220 ℃, 250 ℃, 280 ℃ and 280 ℃ in sequence along the advancing direction, metering and conveying the blend melt by a metering pump 5 to be uniformly distributed on a spinneret plate 3 after screw extrusion, and the flow of the metering pump 5 is 280 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 0.7mm, the receiving height is 60mm, the temperature of hot air generated by the air knife is 295 ℃, the pressure of the hot air is 110kPa, and the air volume of the hot air is 20m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 19-20 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 100ml/min, the spraying pressure of the spraying system 74 is 0.3MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 30cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 5
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced; the length of the spinneret plate 3 is 1200mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2800, the aperture of each spray hole is 0.25mm, the length-diameter ratio of each spray hole is 20, the hole pitch of each spray hole is 0.4mm, and the yield of each spray hole is 0.18 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 285 deg.C, 280 deg.C, 285 deg.C, respectively, and the flow rate of the molten blend in the spinneret 3 is 0.14 ghm;
melt extrusion is carried out by utilizing an extruder 4, wherein the heating temperature of the extruder 4 is 240 ℃, 250 ℃, 260 ℃, 265 ℃ and 265 ℃ in sequence along the advancing direction, and the blend melt is metered and conveyed by a metering pump 5 and uniformly distributed to a spinneret plate 3 after being extruded by a screw, wherein the flow rate of the metering pump 5 is 300 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 0.8mm, the receiving height is 120mm, the temperature of hot air generated by the air knife is 270 ℃, the pressure of the hot air is 80kPa, and the air volume of the hot air is 20m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 25-28 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 92ml/min, the spraying pressure of the spraying system 74 is 0.3MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 35cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 6
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced; the length of the spinneret plate 3 is 1400mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 3000, the aperture of each spray hole is 0.4mm, the length-diameter ratio of each spray hole is 28, the hole spacing of each spray hole is 0.8mm, and the yield of each spray hole is 0.38 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 320 ℃, 310 ℃, 320 ℃ and 320 ℃, respectively, and the flow rate of the molten blend in the spinneret 3 is 0.24 ghm;
melt extrusion is carried out by utilizing an extruder 4, wherein the heating temperature of the extruder 4 is 295 ℃, 305 ℃, 310 ℃, 315 ℃ and 320 ℃ in sequence along the advancing direction, and after screw extrusion, the blend melt is conveyed by a metering pump 5 and is uniformly distributed to a spinneret plate 3, wherein the flow of the metering pump 5 is 340 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 1.0mm, the receiving height is 180mm, the temperature of hot air generated by the air knife is 300 ℃, the pressure of the hot air is 170kPa, and the air volume of the hot air is 23m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 25-28 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 110ml/min, the spraying pressure of the spraying system 74 is 0.4MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 40cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 7
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced; the length of the spinneret plate 3 is 1100mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 3200, the aperture of each spray hole is 0.5mm, the length-diameter ratio of each spray hole is 25, the hole spacing of each spray hole is 0.6mm, and the yield of each spray hole is 0.09 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 270 ℃, 265 ℃, 270 ℃ and 270 ℃, respectively, and the flow rate of the molten blend at the spinneret 3 is 0.23 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 245 ℃, 255 ℃, 260 ℃, 265 ℃ and 270 ℃ in sequence along the advancing direction, and after screw extrusion, conveying the blend melt by a metering pump 5 to be uniformly distributed to a spinneret plate 3, wherein the flow of the metering pump 5 is 280 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
wherein the air knife gap drawn by the air knife is 0.7mm, the receiving height is 70mm, the temperature of hot air generated by the air knife is 280 ℃, the pressure of the hot air is 120kPa, and the air volume of the hot air is 25m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 18-22 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 160ml/min, the spraying pressure of the spraying system 74 is 0.45MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 38cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 8
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced; the length of the spinneret plate 3 is 1300mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2600, the aperture of each spray hole is 0.15mm, the length-diameter ratio of each spray hole is 30, the hole spacing of each spray hole is 1.0mm, and the yield of each spray hole is 0.06 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 275 deg.C, 265 deg.C, 270 deg.C, 275 deg.C, and the flow rate of the molten blend at the spinneret 3 is 0.09 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 180 ℃, 220 ℃, 250 ℃, 260 ℃, 270 ℃ and 270 ℃ in sequence along the advancing direction, metering and conveying the blend melt by a metering pump 5 to be uniformly distributed on a spinneret plate 3 after screw extrusion, and the flow of the metering pump 5 is 280 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
wherein the air knife gap drawn by the air knife is 0.7mm, the receiving height is 60mm, the temperature of hot air generated by the air knife is 280 ℃, the pressure of the hot air is 80kPa, and the air volume of the hot air is 20m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 23-25 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 120ml/min, the spraying pressure of the spraying system 74 is 0.35MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 32cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 9
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced; the length of the spinneret plate 3 is 1250mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2700, the aperture of each spray hole is 0.2mm, the length-diameter ratio of each spray hole is 18, the hole spacing of each spray hole is 0.9mm, and the yield of each spray hole is 0.09 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 285 deg.C, 280 deg.C, 275 deg.C, 280 deg.C, 285 deg.C, respectively, and the flow rate of the molten blend at the spinneret 3 is 0.12 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 270 ℃, 275 ℃, 280 ℃ and 285 ℃ in sequence along the advancing direction, metering and conveying the blend melt by a metering pump 5 to be uniformly distributed on a spinneret plate 3 after screw extrusion, and the flow of the metering pump 5 is 280 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 0.5mm, the receiving height is 90mm, the temperature of hot air generated by the air knife is 280 ℃, the pressure of the hot air is 150kPa, and the air volume of the hot air is 19m3/min；
A cooling device 7 for cooling and solidifying the molten filaments, which comprises a water supply system 71, a constant temperature system 72 for keeping the temperature of water in the water supply system 71 constant, a liquid control valve 711 for adjusting the amount of supplied water, an air supply system 73, an air amount control valve 731 for adjusting the amount of supplied air, a plurality of spray systems 74 disposed between the spinneret 3 and the level of the winding screen 1, and a spray system adjusting mechanism 742 for adjusting the angles and distances of the spray systems;
the water temperature of the water supply system 71 is constant at 24-27 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 180ml/min, the spraying pressure of the spraying system 74 is 0.35MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 36cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
Example 10
A melt-blown nonwoven fabric production apparatus comprising:
the winding net curtain 1 is stretched by a plurality of rollers 2 and driven to circularly advance, and the advancing direction is the direction indicated by an arrow;
a spinneret 3, located above the winding screen 1 and extending vertically along the width direction of the winding screen 1, for ejecting the melt of the polymer after melt extrusion and metering; the number of the spinneret plates is reduced by only arranging one spinneret plate 3, so that the production cost is reduced; the length of the spinneret plate 3 is 1200mm, the spinneret plate is provided with a plurality of spray holes with the same aperture, the number of the spray holes is 2800, the aperture of each spray hole is 0.25mm, the length-diameter ratio of each spray hole is 20, the hole pitch of each spray hole is 0.4mm, and the yield of each spray hole is 0.18 g/min;
the spinneret 3 is divided into a plurality of zones, in this example ten zones, at temperatures of 290 ℃, 285 ℃, 280 ℃, 285 ℃, 290 ℃ respectively, the flow rate of the molten blend at the spinneret 3 being 0.14 ghm;
melt-extruding by using an extruder 4, wherein the heating temperature of the extruder 4 is 270 ℃, 275 ℃, 280 ℃ and 285 ℃ in sequence along the advancing direction, metering and conveying the blend melt by a metering pump 5 to be uniformly distributed on a spinneret plate 3 after screw extrusion, and the flow of the metering pump 5 is 300 ml/min;
a filter 51 is arranged between the extruder 4 and the metering pump 5, and the extruder 4 is connected with the charging barrel 41;
the wind power traction devices 6 are arranged at two sides of the outlet of the spinneret plate 3 and are used for drawing the mixture sprayed by the melt to form filaments;
the wind power traction device 6 utilizes an air compressor 61 and a hot air tank 62 to provide an air source;
wherein the air knife gap drawn by the air knife is 0.8mm, the receiving height is 120mm, the temperature of hot air generated by the air knife is 300 ℃, the pressure of the hot air is 150kPa, and the air volume of the hot air is 28m3/min；
A cooling device for cooling and solidifying the molten filament, a cooling device 7 for cooling and solidifying the molten filament, which comprises a water supply system 71, a constant temperature system 72 for keeping the water temperature in the water supply system 71 constant, a liquid control valve 711 for adjusting the water supply amount, an air supply system 73, an air amount control valve 731 for adjusting the air supply amount, a plurality of spraying systems 74 arranged between the spinneret 3 and the level of the winding screen 1, and a spraying system adjusting mechanism 742 for adjusting the angle and distance of the spraying systems;
the water temperature of the water supply system 71 is constant at 19-20 ℃, ultrapure water is prepared by an RO (reverse osmosis) filter system, the spraying flow of the spraying system 74 is 120ml/min, the spraying pressure of the spraying system 74 is 0.35MPa, the center distance between a nozzle of the spraying system 74 and the spinneret plate 3 is 40cm, the height distance between the nozzle and the spinneret plate 3 is 4cm, and the spraying angle is 90 degrees;
the spraying system 74 is adopted for water vapor cooling, compared with gas cooling, the fiber solidification speed is higher, the fiber toughness is good, the strength is high, and the processing energy consumption is reduced;
the plurality of spraying systems 74 are arranged in parallel and at intervals along the width direction of the winding screen 1, each spraying system 74 is controlled independently, each parameter of spraying of the spraying system is corrected according to different positions of the non-woven fabric, a cross area 75 is arranged between spraying areas of adjacent spraying systems 74, namely atomized water vapor 741 sprayed by the adjacent spraying systems 74 is provided with a superposition area, the arrangement of the cross area 75 enables the low-content water vapor on two sides of the spraying systems 74 to be supplemented, the uniformity of the non-woven fabric in the transverse direction is improved, the mixture at each part extending along the width direction of the winding screen 1 is cooled more uniformly and effectively, and therefore the melt-blown non-woven fabric with a nano/micron fiber interlocking structure with stable performance in the transverse direction and the longitudinal direction is;
the air suction device 8 is arranged below the winding screen 1 and is used for interweaving and adsorbing the filaments on the upper surface of the winding screen 1 to form non-woven fabric;
the air suction device 8 comprises a main air suction mechanism 81 arranged right below the spinneret plate 3, a first auxiliary air suction mechanism 82 positioned at the upstream of the main air suction mechanism 81 and a second auxiliary air suction mechanism 83 positioned at the downstream of the main air suction mechanism 81, and when the mixed fiber 31 falls to the upper surface of the winding screen curtain, the first auxiliary air suction mechanism 82 can effectively avoid the interference on the spraying system 74 caused by upward rebounding, so that the stability of atomized water vapor 741 sprayed by the spraying system 74 is ensured, the uniformity of the non-woven fabric in the transverse direction is ensured, and the stability of a final product is further ensured;
the projection of the spraying system 74 in the vertical direction is located just upstream of the first auxiliary suction mechanism 82;
and the dust suction device 9 is positioned at the downstream of the winding net curtain 1 and used for removing free flying flowers adsorbed on the surface of the non-woven fabric and improving the filtering performance of the non-woven fabric.
The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, and any modifications and variations of the present invention are within the spirit and scope of the following claims.
Claims (11)
1. A preparation device of melt-blown non-woven fabric is characterized by comprising:
the winding net curtain is stretched by a plurality of rollers and driven to circularly advance;
a spinneret positioned above the winding screen and extending along the width direction of the winding screen for ejecting the melt of the polymer after melt extrusion and metering;
the wind power traction device is arranged on the outlet side of the spinneret plate and is used for drawing the polymer sprayed by the melt to form filaments;
the cooling device is used for cooling and solidifying the molten filaments and at least comprises a plurality of spraying systems arranged between the spinneret plate and the level of the winding screen;
and the air suction device is arranged below the winding net curtain and is used for interweaving and adsorbing the filaments on the winding net curtain to form the non-woven fabric.
2. The apparatus for preparing a meltblown nonwoven fabric according to claim 1, characterized in that: the spraying systems are arranged in parallel and at intervals along the width direction of the winding net curtain, and the spraying areas of the adjacent spraying systems are provided with cross areas.
3. The apparatus for producing a meltblown nonwoven fabric according to claim 1 or 2, characterized in that: the cooling device also comprises a water supply system, a constant temperature system for keeping the temperature of water in the water supply system constant, and an air supply system.
4. The apparatus for producing a meltblown nonwoven fabric according to claim 1 or 2, characterized in that: the air suction device at least comprises a main air suction mechanism arranged right below the spinneret plate and a first auxiliary air suction mechanism positioned at the upstream of the main air suction mechanism; the projection of the spraying system in the vertical direction is positioned at the upstream of the first auxiliary air suction mechanism.
5. The apparatus for producing a meltblown nonwoven fabric according to claim 4, characterized in that: the air suction device further comprises a second auxiliary air suction mechanism positioned on the downstream of the main air suction mechanism.
6. The apparatus for preparing a meltblown nonwoven fabric according to claim 1, characterized in that: the dust collector is positioned at the downstream of the winding net curtain and is used for removing free flying dust adsorbed on the surface of the non-woven fabric.
7. The apparatus for producing a meltblown nonwoven fabric according to claim 3, characterized in that: the constant temperature of the water supply system is 15-30 ℃, the spraying flow of the spraying system is 80-500ml/min, the spraying pressure of the spraying system is 0.2-0.5MPa, and the center distance between a spray head of the spraying system and a spinneret plate is 30-40 cm.
8. The apparatus for preparing a meltblown nonwoven fabric according to claim 1, characterized in that: the distance between the spinneret plate and the winding net curtain is 50-200 mm; the spinneret plate is provided with a plurality of spray holes with the same aperture, and the yield of the single spray hole on the spinneret plate is 0.05-0.5 g/min.
9. The apparatus for producing a meltblown nonwoven fabric according to claim 1 or 8, characterized in that: the length of the spinneret plate is 1000-1400mm, the number of the spray holes is 2500-3200, the aperture of the spray holes is 0.1-0.5mm, the hole distance is 0.3-1.0mm, and the length-diameter ratio of the spray holes is 15-30.
10. The apparatus for preparing a meltblown nonwoven fabric according to claim 1, characterized in that: the hot air volume of the wind power traction device is 18-25m3Min, the air knife clearance of the wind power traction device is 0.5-1.0mm, the receiving height is 50-200mm, the temperature of hot air generated by the air knife is 200-320 ℃, and the pressure of the hot air is 25-200 KPa.
11. The apparatus for preparing a meltblown nonwoven fabric according to claim 1, characterized in that: and a metering pump for metering the polymer is arranged above the spinneret plate, and the flow rate of the metering pump is 250-350 ml/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293516A (en) * | 2021-05-26 | 2021-08-24 | 广州市骏呈无纺布有限公司 | Multifunctional composite non-woven fabric and preparation system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293516A (en) * | 2021-05-26 | 2021-08-24 | 广州市骏呈无纺布有限公司 | Multifunctional composite non-woven fabric and preparation system thereof |
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