Cusp die for meltblown nonwoven fabric production

Abstract

To provide a cusp die for producing melt-blown nonwoven fabric, which prevents nonwoven fabric that does not function as a barrier against water and air with all its high quality from being produced.SOLUTION: A cusp die has a sagittal plane (1a), a main extension direction (1b) on the sagittal plane (1a), a first flank (10) and a second flank (11) mutually bounded by the sagittal plane (1a), and comprises an ejection portion (2) extending along the main extension direction (1b) and designed to convey, in use, polymeric fluid towards an external air blade, at least one extrusion pipe configured to convey the polymeric fluid towards the ejection portion (2), and a plurality of holes (4) arranged in the ejection portion (2), placed in fluidic through connection with the extrusion pipe and communicating with the outside, wherein the holes (4) are arranged along at least one first row (4a) and a second row (4b) that are distinct and arranged respectively at the first flank (10) and the second flank (11).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cusp die for manufacturing a melt blown nonwoven fabric of the type specified in the preamble of claim 1. In other words, the present invention relates to a die designed for the purpose of manufacturing a nonwoven fabric, also known as NW, from polymer filaments extruded from the die.

Background Art

[0002] As is known, nonwoven fabrics, or NWs, are industrial products that are similar to fabrics but are manufactured without using methods such as weaving or knitting. Thus, in the case of fabrics, the fibers generally have a two-directional extension perpendicular to each other, like the weft and warp, while nonwoven fabrics do not have a regular structure and the fibers are irregularly spread out.

[0003] Currently, many products containing NWs are manufactured by manufacturing technologies adapted to the product applications.

[0004] In particular, high-quality NWs used in sanitary products for hygiene are distinguished from low-quality NWs used in geotextiles in general.

[0005] From a technical perspective, nonwoven fabrics are mainly classified into spunlace, spunbond, and melt blown.

[0006] Spunlace fabrics are those that have been treated to give the material isotropic strength. Due to having such characteristics, being applicable to a variety of materials such as rayon, polyester, cotton, polyamide resin, microfibers, etc., being able to be adjusted to a smooth finish or a rough finish, etc., and being able to produce various colors, spunlace is recommended for various industries such as the hygiene and sanitary products industry, the automotive industry, the cosmetics industry, and various applications such as industrial use and disposable use.

[0007] Spunbond generally made of polypropylene is a non-woven fabric that can be used in various applications in agriculture, hygiene & sanitation, construction, furniture, mattresses, and other related industries. With appropriate treatment, it is possible to manufacture product lines specialized in that field, such as fluorescence, gloss, anti-mite, fire resistance, antibacterial, anti-static, UV cut, etc. Various finishes can be applied to the spunbond, such as printing, laminating, flexographic printing & laminating, adhesion, etc.

[0008] Meltblown NW is manufactured using a special spinneret to obtain more advanced technical characteristics. In fact, meltblown fabric is characterized by fibers that exhibit high filter performance against both liquids and gases.

[0009] Machines for manufacturing meltblown non-woven fabrics conventionally consist of the components shown in Figure 6.

[0010] Such machines are equipped with a housing that stores both the meltblown fiber manufacturing device and all the components that operate optimally for processing. Furthermore, generally, known manufacturing machines are equipped with a first support, a breaker plate, a cusp die, a second support, and an air blade.

[0011] The breaker plate is designed to carry and filter the polymer, often polypropylene, towards the cusp die. As described above, in the latter part, the device has a perforated cusp part designed to extrude polypropylene under pressure.

[0012] The first support is basically a component that connects the housing and the breaker plate. On the other hand, the second support is designed to support the air blade and is arranged to confine the breaker plate and the meltblown device within the housing.

[0013] When the manufacturing machine parts are limited, the second support and the plate forming the air blade may be the same in some cases. On the other hand, the air blade consists of a case that covers the cusp of the meltblowing device, and thereby, it can direct an air flow (non-turbulent flow if possible) towards the cusp hole.

[0014] From a practical perspective, the polymer material is introduced into the housing and begins to advance at a temperature of about 240 degrees to 270 degrees.

[0015] The material first moves towards the first support, from where it reaches the breaker plate and finally the cusp mold, and is particularly pressurized towards the holes arranged in the cusp.

[0016] In many cases, the cusp has 30 to 50 holes per inch. The holes are arranged along the main direction, have a diameter in the range of 0.15 mm to 0.4 mm, and have a depth 10 to 13 times the diameter.

[0017] When extruded from the cusp hole, the polymer immediately hits the air flow from two directions defined by the air blade.

[0018] The air blade basically consists of two tapered tubes extending with a length between 0.7 mm and 2 mm to the discharge space or slot, and the air flow flows out through the tubes at an angle of about 180 degrees.

[0019] By accelerating the air flow in the blade, when it contacts the polymer, a flow rate that can subdivide the polymer can be obtained. Thereby, it becomes possible to generate a spray flow consisting of ultrafine particles that sequentially adheres onto a fast-moving carpet.

[0020] Therefore, the housing further provided with a polymer inlet duct is provided with an air flow inlet duct leading to the air blade.

[0021] Such prior art has obvious drawbacks.

[0022] In particular, as is clear from the matters described, the meltblowing technique requires a dedicated component configuration and procedures defined in detail.

[0023] In particular, in order to produce NWs with excellent properties, it is necessary to increase the number of holes per inch, that is, the polymer flow rate or throughput. However, it is not easy to make holes with a diameter of less than 0.15 mm, and it also incurs costs. Therefore, the known techniques have significant physical limitations. When polymer adheres to the blade surrounding the meltblowing cusp, in many cases, the polymer burns or clogs between the blade and the meltblowing cusp, leading to meltblowing failures and deterioration of product quality.

[0024] In particular, in the case of the prior art cusp type, there are cases where non-woven fabrics of high quality are produced but do not function as barriers to water and air. In fact, the holes having the above shape cannot minimize the space existing on the non-woven fabric, thereby reducing the efficiency. Summary of the Invention Problems to be Solved by the Invention

[0025] In view of such a situation, the technical problem underlying the present invention is to devise a cusp type for manufacturing meltblown non-woven fabrics that can significantly improve at least some of the above demerits.

[0026] In view of the above technical problem, an important object of the present invention is to obtain a cusp type that can produce more efficient non-woven fabrics without dimensional limitations in fineness, exceeding the prior art.

[0027] A further important object of the present invention is to obtain a cusp type that significantly reduces the space between the fibers of the non-woven fabric in order to enhance the barrier against water and air generated by the fabric itself.

[0028] A further object of the present invention is to obtain a cusp that can improve the efficiency of NW products without the need to change the structure of currently devised meltblown manufacturing machines.

[0029] A further problem of the present invention is to obtain a cusp type compatible with current meltblown manufacturing machines.

Means for Solving the Problems

[0030] The technical problem and its object are achieved by a cusp type for meltblown nonwoven fabric production described in appended claim 1.

[0031] Preferred technical embodiments are emphasized in the dependent claims.

[0032] The features and effects of the present invention will be clarified in the following detailed description regarding the preferred embodiments of the present invention, with reference to the accompanying drawings.

Brief Description of the Drawings

[0033]

Figure 1

Figure 2

Figure 3a

Figure 3b

Figure 4

Figure 5a

Figure 5b

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0034] In this specification, dimensions, numerical values, shapes, and geometric references (such as vertical and parallel) are to be understood as excluding dimensional errors or mistakes due to production and / or manufacturing errors, as well as cases that slightly differ from the stated dimensions, numerical values, shapes, or geometric references, when described together with words such as "substantially" or similar expressions such as "about" or "approximately". For example, when a numerical value is described, preferably, it indicates a range where the error from that numerical value is 10% or less.

[0035] Furthermore, when expressions such as "first", "second", "higher", "lower", "main", "secondary", etc. are used, they do not necessarily specify order, priority, or relative position, but are merely used to more clearly distinguish different components.

[0036] Unless otherwise specified, the dimensions and data described in this specification are to be interpreted as conforming to the International Standard Atmosphere ICAO (ISO2533:1975).

[0037] Referring to the drawings, the cusp die for meltblown nonwoven fabric production according to the present invention is generally denoted by reference numeral 1 throughout.

[0038] The die 1 is basically configured to be provided inside a meltblown nonwoven fabric manufacturing machine.

[0039] Therefore, at least a part of the die 1 preferably has a cusp shape or an arrow shape.

[0040] Basically, a meltblown manufacturing machine with type 1 also has the conventional parts of the type.

[0041] As shown in FIG. 4, the manufacturing machine may include a housing, a breaker plate, one or more supports, and an air blade.

[0042] The housing is often a U-shaped storage device for arranging the manufacturing machine parts inside it.

[0043] In particular, it is preferable that the housing has at least one main duct.

[0044] The main duct is preferably designed such that the polymer fluid flows through the housing.

[0045] Common in general meltblown manufacturing machines, the main duct is preferably designed such that the polymer fluid having a temperature of about 240 degrees to 270 degrees flows through it. In fact, for example, the polymer fluid may be made of polypropylene.

[0046] The breaker plate preferably has at least one or more conduits.

[0047] The conduit may be of the type having a tapered shape. The conduit is preferably in fluid communication with the main duct and is preferably designed to direct the polymer fluid or carry the polymer fluid along a predetermined direction.

[0048] Furthermore, between the conduit and the main duct, at least one filtering element is often arranged to filter the polymer fluid before it is discharged from the manufacturing machine.

[0049] The breaker plate is preferably attached to the housing via the first support. Therefore, if possible, the first support may be provided with the connection part arranged between the main duct and the duct upstream of the filtering element.

[0050] Therefore, type 1 is preferably designed to be attached to the downstream side of the breaker plate so as to receive the polymer fluid filtered by the breaker plate.

[0051] In any case, type 1 preferably has a sagittal plane 1a.

[0052] The sagittal plane 1a is basically an intermediate plane designed to divide type 1 into two adjacent parts, and the divided parts are basically arranged side by side.

[0053] The sagittal plane 1a further defines an extension plane extending in the direction in which type 1 extends.

[0054] Type 1 is thus designed to be attached to the breaker plate in the meltblown manufacturing machine. Thereby, the sagittal plane 1a is parallel to the direction defined by the duct. In other words, in use, type 1 is designed to be attached to the breaker plate. Thereby, the sagittal plane 1a will be on the sagittal plane of the entire manufacturing machine.

[0055] Therefore, type 1 defines a first flank 10 and a second flank 11 with respect to the sagittal plane 1a.

[0056] The first flank 10 and the second flank 11 are adjacent to each other with the sagittal plane 1a as the boundary. As shown in FIGS. 1 to 5b, both flanks basically correspond to the left and right flanks of type 1 when used in the manufacturing machine.

[0057] Type 1 further has a main extension direction 1b.

[0058] The main extension direction 1a is a predetermined direction on the sagittal plane 1a. The first flank 10 and the second flank 11 are basically positioned side by side with respect to the sagittal plane 1a along the main extension direction 1b.

[0059] Therefore, the mold 1 comprises an injection part 2.

[0060] The injection part 2 extends along the main extension direction 1b. In particular, the injection part 2 preferably extends so as to define a part of the first flank 10 and at the same time a part of the second flank 11.

[0061] Therefore, the injection part is preferably basically divided into two parts so as to be mirror-symmetrical by the sagittal plane 1a.

[0062] In any case, the injection part 2 is designed such that the polymer fluid flows towards the air blade during use. The air blade is an external element of the mold 1 as already described. In particular, the air blade is a part of a meltblown manufacturing machine and is often attached to the first support in the vicinity of the injection part 2 by the second support. Thereby, when the polymer fluid is extruded from the injection part 2, a controlled air flow can be applied to the polymer fluid.

[0063] To flow the polymer fluid towards the injection part 2, the mold comprises at least one extrusion tube 3.

[0064] The extrusion tube 3 is preferably configured to flow the polymer fluid towards the injection part 2. In particular, the extrusion tube 3 preferably extends along the sagittal plane 1a. Furthermore, it is preferably designed to be in fluid communication with the conduit of the breaker plate during use. Thereby, the extrusion tube 3 receives the fluid filtered by the breaker plate.

[0065] The extrusion tube 3 preferably extends perpendicular to the main extension direction 1b of the mold 1.

[0066] Furthermore, the mold type 1 may include a plurality of extrusion tubes 3 arranged along or parallel to the main extension direction 1b, and each tube extends perpendicular or parallel to the other extrusion tubes 3.

[0067] The mold type 1 also thus has a plurality of holes 4.

[0068] The holes 4 are preferably arranged in the injection part 2. Furthermore, the holes 4 are positioned to be in fluid communication with the extrusion tubes 3 and communicate with the outside.

[0069] In fact, the holes 4 are configured to discharge the polymer fluid to the outside.

[0070] Furthermore, when the mold type 1 is used in a manufacturing machine, the holes 4 are arranged in the vicinity of the (one or more) air blades. In particular, the holes 4 are preferably arranged in the vicinity of the mold, or may extend across or partially across the cusp, or may be arranged partially in the vicinity of the blade.

[0071] All the holes 4 may be in fluid communication with the extrusion tubes 3, or each hole may be in fluid communication with a single extrusion tube 3.

[0072] Although not essential, the holes 4 preferably extend perpendicular to the main extension direction 1b and parallel to the sagittal plane 1a.

[0073] Unlike the prior art molds, an advantage is that the holes 4 of the mold type 1 are not arranged in a single row.

[0074] In particular, the holes 4 of the mold type 1 are arranged along at least one row 4a and a second row 4b.

[0075] The first column 4a and the second column 4b are distinguishable from each other. That is, the first column 4a and the second column 4b are not the same. Further, the columns 4a and 4b are preferably basically parallel to the main extension direction 1b. More specifically, at least one column does not coincide with the main extension direction 1b and is not arranged on the sagittal plane 1a.

[0076] Furthermore, the first column 4a is preferably arranged on the first flank 10. The second column 4b is preferably arranged on the second flank 11.

[0077] More specifically, as shown in FIGS. 1 to 5b, the columns 4a and 4b are preferably arranged in an inverted manner with respect to the sagittal plane 1a.

[0078] The arrangement of the holes 4 in two columns enables a special configuration to be obtained.

[0079] Along the direction perpendicular to the sagittal plane 1a, the holes 4 are preferably arranged alternately in the columns 4a and 4b so that the holes 4 do not adjacent to each other. In other words, the holes 4 arranged in one of the columns 4a and 4b are located adjacent to the isolation space between two holes 4 arranged in the other column 4a or 4b.

[0080] More specifically, in one of the preferred embodiments, the holes 4 are arranged alternately along the main extension direction 1b. Thereby, the isolation space between adjacent holes 4 arranged in the same column 4a or 4b is smaller than the extension of the column 4a or 4b of the holes 4 arranged in the other column 4a or 4b located near the isolation space.

[0081] In other embodiments, adjacent holes 4 arranged in the same column 4a or 4b define an isolation space that is approximately equal to the extension along its own column 4a or 4b of the holes 4 arranged in the other column 4a or 4b and adjacent to each other with the isolation space in between.

[0082] Alternatively, the holes 4 arranged in the same column 4a or 4b and adjacent to each other may define an isolation space that is smaller than the extension along its own column 4a or 4b of the hole 4 arranged in the other column 4a or 4b and located adjacent to each other across the isolation space. However, in the latter case, the isolation space is preferably limited in any case for the purpose of obtaining a high-quality nonwoven fabric.

[0083] The arrangement of the holes 4 can thus be defined by various configurations.

[0084] For example, referring to FIGS. 2 and 5b, the injection part 2 may entirely define the end 20.

[0085] The end 20 may be a pointed tip. That is, the end 20 geometrically defines a singular point that defines the left and right derivations, and the derivations correspond to the derivations from the first flank 10 and the second flank 11 that do not match each other.

[0086] The end 20 is further preferably aligned with the main extension direction 1b and arranged on the sagittal plane 1a.

[0087] In other words, the end 20 extends on the sagittal plane 1a parallel to the main extension direction 1b.

[0088] The columns 4a and 4b are thus positioned to be mirror-symmetric via the end 20.

[0089] Alternatively, as shown in FIGS. 1, 3a and 3b, and 5a, the mold 1 may define two ends 20.

[0090] In this case, the two ends 20 extend parallel to the main extension direction 1b and towards the sagittal plane 1a. Further, the injection part 2 has a plane 21.

[0091] The plane 21 is preferably perpendicular to the sagittal plane 1a. Further, the plane 21 is basically defined with the end 20 as the boundary and extends along the main extension direction 1b.

[0092] Here, in the present embodiment, at least three different hole 4 configurations can be defined.

[0093] For example, in the first configuration shown in FIGS. 3a, 3b, and 5a, columns 4a and 4b are preferably arranged and extending on end 20. Thereby, at least a part of the hole 4 extends on the plane 21.

[0094] In an alternative, second configuration, as shown in FIG. 1, columns 4a and 4b extend parallel to end 20 and outside plane 21. Thereby, the hole 4 does not extend across the plane 21.

[0095] In an alternative, third configuration, although not shown in the drawings, the columns extend parallel to end 20 and across the plane 21. Thereby, all of the holes 4 extend across the plane 21.

[0096] Type 1 may, of course, be formed by combining these three configurations. For example, the holes 4 may be arranged in two or more columns of columns 4a and 4b, and may also be partially arranged on the end 20 and / or on the plane 21 and / or outside the plane 21.

[0097] Furthermore, in an embodiment where the injection part has only one end 20, the holes 4 may be arranged in two or more columns of columns 4a and 4b.

[0098] Furthermore, the holes 4 may basically be arranged so as to be in contact with the ends, but as shown in FIGS. 7 and 8, a part of the holes 4 may overlap the other side 10 or 11.

[0099] Of course, the columns 4a and 4b may be simply regarded as the directions passing through the centers of the holes 4 in each of the columns 4a and 4b.

[0100] From a geometric point of view, the holes 4 may have any shape, but the holes 4 are preferably basically cylindrical.

[0101] Furthermore, the hole 4 is preferably defined with a diameter of 0.05 mm.

[0102] Particularly when the holes 4 are arranged in two or more rows of row 4a and row 4b, the holes 4 can be arranged along the main extension direction 1b over the injection part 2 with a linear density of more than 50 holes per inch.

[0103] Of course, the linear density in the arrangement of the holes 4 also depends on the size of the holes 4 themselves. Anyway, considering the minimum dimension of the holes 4 that can be used in the mold 1, the maximum linear density obtained is about 280 holes per inch in terms of the number of holes.

[0104] Furthermore, considering convenience, the maximum linear density is about 250 holes per inch in terms of the number of holes.

[0105] For holes 4 with a diameter of about 0.3 mm that a general mold has, with a linear density in the range of 30 to 50 holes per inch in terms of the number of holes, the mold 1 can arrange more than 50 holes per inch. This is because the holes 4 are arranged along the divided rows such as row 4a and row 4b, and it is more preferable to arrange more than 70 holes per inch.

[0106] Basically, regardless of the dimensions of the holes 4, the mold 1 can always achieve an arrangement with a high linear density, and thus an increase in the flow rate of the polymer fluid injected from the injection part 2.

[0107] Such a density is achieved by the arrangement of the holes 4 devised in the above-described embodiment.

[0108] Of course, the density may be increased by further adding rows along the diameter of the holes.

[0109] Note that the linear density may also be measured by providing various holes 4 on the sagittal plane 1a along the main extension direction 1b.

[0110] The manufacturing machine equipped with Type 1 may, as a conclusion, be provided with a container.

[0111] The container is preferably designed to collect polymer particles so as to manufacture non-woven fabric and is basically a movable part of the device, defined, for example, by a continuously moving belt conveyor.

[0112] The container is basically disposed under Type 1 and is configured to receive polymer filaments from hole 4 when used in a meltblown manufacturing machine. The hole faces the container so that the polymer fluid flows into the container by its own weight and the air flow from the air blade.

[0113] The container 6 preferably defines the collection direction basically parallel to the main extension direction 1b.

[0114] Type 1 for manufacturing meltblown non-woven fabric, described from a technical perspective, is operated basically in the same way as the operation of the type in the prior art.

[0115] In any case, a meltblown manufacturing machine equipped with Type 1 enables the production of high-quality meltblown non-woven fabric.

[0116] In fact, Type 1 for manufacturing meltblown non-woven fabric according to the present invention exhibits important effects.

[0117] With Type 1, the space between the fibers of the non-woven fabric can be significantly reduced, thereby enhancing the barrier against water and air caused by the fabric itself.

[0118] Such features can be obtained without changing the operation of Type 1 from that of the type in the prior art. Therefore, it can be made compatible with any existing meltblown manufacturing machine.

[0119] Therefore, with Type 1, the efficiency of the meltblown manufacturing machine to which the type is attached can be increased, and it becomes possible to manufacture highly functional non-woven fabric.

[0120] Increasing the number of extrusion tubes 3 of type 1 can also increase the flow rate and throughput of the polymer, which is one of the effects.

[0121] Within the scope of the inventive concept defined by the claims, various modifications can be made to the present invention.

[0122] In particular, at least a part of the injection section 2 may be provided with a chromium-plated surface so as to reduce the porosity of the contact surface between the polymer fluid and the injection section 2, thereby enhancing the fluidity of the fluid flowing through a part of the injection section 2 and flowing out from the holes 4. At least a part of the injection section 2 between the holes 4 preferably has a chromium-plated surface if possible.

[0123] In a meltblown manufacturing machine equipped with type 1, for the purpose of further enhancing the efficiency of the manufacturing machine, the chromium-plated surface may extend to the air blade or air knife.

[0124] Therefore, at least one or both of the injection section 2, particularly a part of the injection section 2 between the holes 4, and the air blade are provided with a chromium-plated surface to increase the flow rate of the polymer fluid.

[0125] The holes 4 arranged in column 4a and column 4b may further have different dimensions. That is, they may have different dimensions from each other. For example, the diameters of the holes 4 arranged in the same column 4a or column 4b may be different from each other, or, or further, the diameters of the holes 4 located in different columns 4a and 4b may also be different from each other.

[0126] In view of the above, all detailed elements can be replaced with equivalent elements, and the materials, shapes, and dimensions can be any materials, shapes, and dimensions.

Claims

1. A cusp die (1) for manufacturing a melt blown nonwoven fabric, having a sagittal plane (1a), a major extension direction (1b) on the sagittal plane (1a), and a first flank (10) and a second flank (11) adjacent to each other with the sagittal plane (1a) as a boundary, an injection part (2) extending along the major extension direction (1b) and designed to flow a polymer fluid toward an external air blade during use, at least one extrusion tube (3) configured to flow the polymer fluid toward the injection part (2), a plurality of holes (4) arranged in the injection part (2), positioned to be in fluid communication with the extrusion tube (3), and communicating with the outside, wherein the holes (4) are different from each other and are arranged along at least one of a first row (4a) and a second row (4b) parallel to the major extension direction (1b) respectively arranged in the first flank (10) and the second flank (11), and the die (1) is characterized in this.

2. The die (1) according to claim 1, wherein the rows (4a, 4b) are arranged in mirror symmetry with respect to the sagittal plane (1a).

3. The die (1) according to claim 1 or 2, wherein the holes (4) are arranged alternately in the rows (4a, 4b) so that the holes (4) are not adjacent to each other along a direction perpendicular to the sagittal plane (1a).

4. The injection part (2) entirely defines an end (20) extending on the sagittal plane (1a) parallel to the major extension direction (1b), and the rows (4a, 4b) are adjacent to each other in a mirror-symmetrical manner via the end (20), and the die (1) according to any one of claims 1 to 3 is characterized in this.

5. The injection part (2) defines two ends (20) extending parallel to the major extension direction (1b) and a flat surface (21) perpendicular to the sagittal plane (1a), the flat surface (21) is surrounded by the two ends (20), and the die (1) according to any one of claims 1 to 3 is characterized in that it extends along the major extension direction (1b).

6. The die (1) according to claim 5, wherein the rows (4a, 4b) are arranged and extended on the two ends (20) such that at least a part of the holes (4) extends on the flat surface (21).

7. The mold (1) according to claim 5, characterized in that the rows (4a, 4b) extend beyond the flat surface (21) and parallel to the two ends (20) so that the holes (4) do not exist on the flat surface (21).

8. The mold (1) according to claim 5, characterized in that the rows (4a, 4b) extend parallel to the two ends (20) on the flat surface (21) so that all of the holes (4) extend on the flat surface (21).

9. A meltblown nonwoven fabric manufacturing machine comprising the mold (1) according to any one of claims 1 to 8.

10. A meltblown nonwoven fabric manufacturing machine further comprising an air blade, The meltblown nonwoven fabric manufacturing machine according to claim 9, characterized in that at least one of a part of the injection part (2) between the holes (4) and the air blade has a surface plated with chromium in order to increase the flow rate of the polymer fluid.

11. A method for manufacturing a meltblown nonwoven fabric using the meltblown fabric manufacturing machine according to claim 9, wherein the extrusion tube (3) receives a polymer fluid from the outside, and the air blade guides an air flow toward the injection part (2).

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