Method for manufacturing functional fabric and functional fabric manufactured using the same

Abstract

The present invention relates to a method for manufacturing a functional fabric and a functional fabric manufactured using the same. Specifically, it relates to a technology in which a first nonwoven fabric, consisting of a wet nonwoven fabric immersed in a mixture of functional substances, and a second nonwoven fabric, consisting of a dry nonwoven fabric, are laminated on both sides of a filling nonwoven fabric into which a functional substance and a hot melt adhesive are filled for the manufacture of filters, etc. Specifically, the method comprises: a filling nonwoven fabric preparation step (S100) in which a powder-form filling substance containing one or more selected from a hot melt adhesive and a functional substance is filled inside a filling nonwoven fabric (10); a first nonwoven fabric preparation step (S200) in which a first nonwoven fabric (21) is immersed in a mixture of functional substances formed by mixing a powder-form functional substance and a solvent; and a second nonwoven fabric preparation step (S300) in which a second nonwoven fabric (22) is prepared. The main composition comprises a nonwoven fabric lamination step (S400) in which a first nonwoven fabric (21) and a second nonwoven fabric (22) are laminated by heat pressing on both sides of the above-mentioned filling nonwoven fabric (10). This research was conducted with funding from Gyeonggi-do and support from the Gyeonggi Economic & Science Promotion Agency (Project No. D2505017).

Description

Technology Field

[0001] The present invention relates to a method for manufacturing a functional fabric and a functional fabric manufactured using the same, and to a technology in which a first nonwoven fabric, consisting of a wet nonwoven fabric immersed in a mixture of functional materials, and a second nonwoven fabric, consisting of a dry nonwoven fabric, are laminated on both sides of a filling nonwoven fabric into which a functional material and a hot melt adhesive are filled for the manufacture of filters, etc. Background Technology

[0002] Patent Document 1 presents a technology comprising: a first step of laminating a nonwoven fabric for filling an adsorbent onto a first nonwoven fabric substrate; a second step of scattering an adsorbent onto the laminated nonwoven fabric for filling an adsorbent to fill the internal pores of the nonwoven fabric for filling an adsorbent; and a third step of covering the upper part of the nonwoven fabric for filling an adsorbent filled with a second nonwoven fabric substrate coated with a hot melt adhesive and heat-bonding it.

[0003] Patent Document 2 comprises: a fiber opening and mixing step of opening polypropylene staple fibers, polyethylene-polyethylene terephthalate composite staple fibers, and acrylic-copper composite staple fibers and mixing them at a predetermined mixing ratio; a carding step of carding the opened and mixed staple fibers; a bottom web forming step of forming a bottom web using the carded staple fibers; an activated carbon particle coating step of coating activated carbon particles on the upper surface of the bottom web; a top web forming step of forming a top web that fits the size of the bottom web coated with activated carbon particles; an activated carbon nonwoven fabric forming step of calendering the bottom web coated with activated carbon particles and the top web to form an activated carbon nonwoven fabric; a meltblown nonwoven fabric preparation step of preparing a meltblown nonwoven fabric that fits the size of the activated carbon nonwoven fabric; and a heat bonding step of aligning and heat-bonding the activated carbon nonwoven fabric and the meltblown nonwoven fabric using an adhesive to form a nonwoven fabric for an air filter. The present invention provides a technology comprising an immersion step of immersing the above-mentioned nonwoven fabric for an air filter in a phytoncide aqueous solution; and a drying step of removing the immersed above-mentioned nonwoven fabric for an air filter from the phytoncide aqueous solution and drying it.

[0004] Patent document 3 presents a copper-coated nonwoven fabric comprising: a nonwoven fabric; and a copper coating layer formed on the surface of the nonwoven fabric; wherein, when the basis weight of the copper-coated nonwoven fabric is 70 g / m², the copper coating layer has a thickness of 5 to 55 nm.

[0005] Patent Document 4 presents a technology comprising the steps of: preparing an electrostatically treated polypropylene nonwoven fabric; and manufacturing an embossed nonwoven fabric electrostatic filter by forming a plurality of embossing protrusions on one surface of the electrostatically treated polypropylene nonwoven fabric using an embossing roller, wherein the temperature of the embossing roller is performed under conditions of 60 ℃ to 90 ℃ and the speed of the embossing roller is performed under conditions of 14 cm / s to 35 cm / s. Prior art literature

[0006] (Patent Document 0001) KR 10-2022-0120950 A (Publication Date: August 31, 2022)(Patent Document 0002) KR 10-2373508 B1 (Registration Date: March 7, 2022)(Patent Document 0003) KR 10-2022-0154573 A (Publication Date: November 22, 2022)(Patent Document 0004) KR 10-2019-0028408 A (Publication Date: March 18, 2019) The problem to be solved

[0007] The present invention relates to a method for manufacturing a functional fabric and a functional fabric manufactured using the same. The purpose of the invention is to provide a technology that prevents obstruction of wind passage by filling the pores of a filling nonwoven fabric, in which fibers are deflected in one direction, with a hot-melt adhesive in the form of a fine powder and a functional material, thereby maintaining point contact with a first nonwoven fabric and a second nonwoven fabric laminated on both sides thereof, and then forming the first nonwoven fabric as a wet nonwoven fabric and immersing it in a mixture of functional materials to form it, thereby uniformly carrying functional material particles to the core of the first nonwoven fabric while maintaining the fine pores of the wet nonwoven fabric. means of solving the problem

[0008] The present invention relates to a method for manufacturing a functional fabric, comprising: a filling nonwoven fabric preparation step (S100) in which a filling nonwoven fabric (10) is filled with a powder-form filling material comprising one or more selected from a hot melt adhesive and a functional material; a first nonwoven fabric preparation step (S200) in which a first nonwoven fabric (21) is immersed in a functional material mixture formed by mixing a powder-form functional material and a solvent; a second nonwoven fabric preparation step (S300) in which a second nonwoven fabric (22) is prepared; and a nonwoven fabric lamination step (S400) in which the first nonwoven fabric (21) and the second nonwoven fabric (22) are laminated by heat pressing on both sides of the filling nonwoven fabric (10).

[0009] The present invention relates to a method for manufacturing a functional fabric, wherein the filling nonwoven fabric preparation step (S100) comprises: a filling material preparation step (S110) for preparing a selected filling material; a filling nonwoven fabric driving step (S120) for driving a wound filling nonwoven fabric (10); and a filling material application step (S130) for applying a filling material to the filling nonwoven fabric (10).

[0010] The present invention relates to a method for manufacturing a functional fabric, wherein the filling nonwoven fabric preparation step (S100) comprises a filling nonwoven fabric compression step (S140) for compressing the filling nonwoven fabric (10).

[0011] The present invention relates to a method for manufacturing a functional fabric, wherein the first nonwoven fabric preparation step (S200) comprises: a functional material mixture receiving step (S210) for receiving a selected functional material mixture in an immersion tank (200); a first nonwoven fabric driving step (S220) for driving the first nonwoven fabric (21); and a first nonwoven fabric immersion step (S230) for immersing the first nonwoven fabric (21) in an immersion tank (200).

[0012] The present invention relates to a method for manufacturing a functional fabric, wherein the first nonwoven fabric preparation step (S200) comprises: a first nonwoven fabric dehydration step (S240) for dehydrating the first nonwoven fabric (21); and a first nonwoven fabric drying step (S250) for drying the first nonwoven fabric (21).

[0013] The present invention relates to a method for manufacturing a functional fabric, wherein the first nonwoven fabric preparation step (S200) includes an air pocket removal step (S225) for removing air within the pores of the first nonwoven fabric (21) prior to the first nonwoven fabric immersion step (S230).

[0014] The present invention relates to a method for manufacturing a functional fabric, comprising a meltblown nonwoven fabric attachment step (S600) of attaching a meltblown nonwoven fabric (30) to the first nonwoven fabric (21).

[0015] The present invention relates to a functional fabric and is manufactured by a method for manufacturing a functional fabric. Effects of the invention

[0016] The present invention is formed by combining a first nonwoven fabric prepared by immersing it in a functional material mixture with a filling nonwoven fabric filled with a functional material in the form of fine powder. This provides the effect of implementing not only physical filtration but also chemical filtration functions, such as deodorization, in a single fabric when manufacturing a filter using a functional fabric. The present invention is bonded through point adhesion between the first nonwoven fabric and the second nonwoven fabric laminated on both sides of the filling nonwoven fabric, thereby preventing the blockage of micropores and preventing an increase in differential pressure of the functional fabric. By immersing the first nonwoven fabric in a functional material mixture, the present invention provides the effect of allowing functional material particles to penetrate evenly into the core of the first nonwoven fabric. Furthermore, by ensuring that the functional material particles are strongly fixed to the fibers of the first nonwoven fabric through dehydration and drying operations after immersion, the present invention provides the effect of preventing functional material particles from scattering from the first nonwoven fabric when wind passes through. Brief explanation of the drawing

[0017] FIG. 1 is a drawing showing a method for manufacturing a functional fabric of the present invention. FIG. 2 is an exploded perspective view of the functional fabric of the present invention. FIG. 3 is a conceptual diagram illustrating the method for manufacturing the functional fabric of the present invention. FIG. 4 is a drawing showing the preparation step of the filling nonwoven fabric of the present invention. FIG. 5 is another drawing showing the preparation step of the filling nonwoven fabric of the present invention. FIG. 6 is another drawing showing the preparation step of the filling nonwoven fabric of the present invention. FIG. 7 is a conceptual diagram showing the preparation step of the filling nonwoven fabric of the present invention. FIG. 8 is another conceptual diagram illustrating the preparation step of the filling nonwoven fabric of the present invention. FIG. 9 is a drawing showing the first nonwoven fabric preparation step of the present invention. FIG. 10 is another drawing illustrating the first nonwoven fabric preparation step of the present invention. FIG. 11 is another drawing illustrating the first nonwoven fabric preparation step of the present invention. FIG. 12 is a conceptual diagram illustrating the first nonwoven fabric preparation step of the present invention. FIG. 13 is another conceptual diagram illustrating the first nonwoven fabric preparation step of the present invention. FIG. 14 is a drawing showing the first nonwoven fabric dehydration step and the first nonwoven fabric drying step of the first nonwoven fabric preparation step of the present invention. FIG. 15 is a conceptual diagram showing the first nonwoven fabric dehydration step and the first nonwoven fabric drying step of the first nonwoven fabric preparation step of the present invention. FIG. 16 is a drawing showing the air pocket removal step of the first nonwoven fabric preparation step of the present invention. FIG. 17 is a conceptual diagram showing the air pocket removal step of the first nonwoven fabric preparation step of the present invention. FIG. 18 is a drawing showing the second nonwoven fabric preparation step of the present invention. FIG. 19 is a drawing showing the meltblown nonwoven fabric attachment step of the present invention. FIG. 20 is an exploded perspective view of a functional fabric including the meltblown nonwoven fabric of the present invention. Specific details for implementing the invention

[0018] Hereinafter, the most preferred embodiment of the present invention is described in detail to enable a person skilled in the art to easily practice the present invention. The reference numbers of the embodiments are not limited to designated numbers, and all numbers may be accepted. The configurations presented in the embodiments may be extended to objects that produce the same purpose and effect. Sub-concepts of the configurations presented in the embodiments may be deemed implied even if not explicitly stated.

[0019] (Example 1-1) The present invention relates to a method for manufacturing a functional fabric, comprising: a filling nonwoven fabric preparation step (S100) in which a filling material in the form of a powder containing one or more selected from a hot melt adhesive and a functional material is filled inside a filling nonwoven fabric (10); a first nonwoven fabric preparation step (S200) in which a first nonwoven fabric (21) is immersed in a functional material mixture formed by mixing a powder-form functional material and a solvent; a second nonwoven fabric preparation step (S300) in which a second nonwoven fabric (22) is prepared; and a nonwoven fabric lamination step (S400) in which the first nonwoven fabric (21) and the second nonwoven fabric (22) are laminated by heat pressing on both sides of the filling nonwoven fabric (10).

[0020] (Example 1-2) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 1-1, the filling nonwoven fabric (10) is formed in a shape in which the fibers are arranged in a biased direction.

[0021] (Examples 1-3) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 1-1, the first nonwoven fabric (21) is formed as a wet nonwoven fabric.

[0022] (Examples 1-4) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 1-2, the filling nonwoven fabric (10) is formed of a material with a lower melting point than the first nonwoven fabric (21) and the second nonwoven fabric (22).

[0023] (Examples 1-5) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 1-1, the filling nonwoven fabric (10), the first nonwoven fabric (21), and the second nonwoven fabric (22) are formed by winding them so as to be runnable with a certain length.

[0024] (Examples 1-6) The present invention relates to a method for manufacturing a functional fabric, and in Example 1-5, includes a tension control step for controlling the tension of the filling nonwoven fabric (10), the first nonwoven fabric (21), and the second nonwoven fabric (22).

[0025] (Examples 1-7) The present invention relates to a method for manufacturing a functional fabric, wherein, in Example 1-5, after the nonwoven fabric lamination step, a functional fabric cutting step (S500) is performed to cut the fabric into a selected shape and size.

[0026] The present invention relates to a method for manufacturing a functional fabric, comprising: a filling nonwoven fabric preparation step (S100) in which a filling nonwoven fabric (10) is filled with a powder-form filling material comprising one or more selected from a hot melt adhesive and a functional material; a first nonwoven fabric preparation step (S200) in which a first nonwoven fabric (21) is immersed in a functional material mixture formed by mixing a powder-form functional material and a solvent; a second nonwoven fabric preparation step (S300) in which a second nonwoven fabric (22) is prepared; and a nonwoven fabric lamination step (S400) in which the first nonwoven fabric (21) and the second nonwoven fabric (22) are laminated by heat pressing on both sides of the filling nonwoven fabric (10).

[0027] In the preparation step (S100) for the filling nonwoven fabric, the functional material that constitutes the filling material is a material suitable for the purpose of the product manufactured using the functional fabric. For example, if the functional fabric is to be manufactured as a filter, the functional material may be a material capable of deodorizing to remove harmful gases. The functional material may be activated carbon, graphene, carbon nanotubes, zeolite, silica gel, bentonite, diatomaceous earth, metal-organic frameworks (MOFs), etc., and the filling material is formed in the form of a fine powder and filled into the filling nonwoven fabric (10).

[0028] The functional material constituting the filling material is formed in a powder form, thereby maximizing the surface area in contact with air and increasing deodorization efficiency relative to the same amount. Additionally, when at least two functional materials are filled, the functional materials formed in powder form can be easily filled in an optimal ratio. In the case of the hot melt adhesive, it is formed in a fine powder form, so that when heat is applied during the nonwoven fabric lamination stage, it does not melt and cover the entire filling nonwoven fabric, but rather achieves spot adhesion where adhesive force is exerted only at the location of the powder. Through this, the hot melt adhesive does not block the entire pore of the filling nonwoven fabric (10), thereby preventing obstruction of air flow.

[0029] At this time, the filling nonwoven fabric (10) is formed in a shape in which the fibers are arranged in a biased direction. Through this, at least one filling material, such as a hot melt adhesive or a functional material, can penetrate deep into the interior of the filling nonwoven fabric (10) through the pores between the fibers, and even if the filling nonwoven fabric (10) has a very thin thickness, it has the strength to withstand tension in one direction, thereby preventing the shape of the filling nonwoven fabric (10) from being deformed or damaged during the nonwoven fabric lamination step (S400).

[0030] The first nonwoven fabric preparation step (S200) involves immersing the first nonwoven fabric (21) in a functional material mixture to absorb the functional material into the first nonwoven fabric (21). The first nonwoven fabric preparation step (S200) utilizes the fluidity of the liquid to ensure that the functional material particles are evenly coated onto the first nonwoven fabric (21). In particular, the first nonwoven fabric preparation step (S200) allows the functional material to reach deep inside the first nonwoven fabric (21), thereby enabling the maximum efficient operation of the functional material relative to the same amount. Additionally, during the drying process after immersion in the functional material mixture, the particles of the functional material adhere strongly to the fibers of the first nonwoven fabric (21), preventing the particles of the functional material from scattering from the first nonwoven fabric (21) due to airflow when manufactured into a filter.

[0031] The first nonwoven fabric preparation step (S200) described above involves immersing the nonwoven fabric in a functional material mixture, thereby forming the first nonwoven fabric (21) as a wet nonwoven fabric. In particular, the present invention is applied by filling the pores formed in one direction of the filling nonwoven fabric (10) with a hot melt adhesive in the form of fine powder. Through this, the present invention can form the first nonwoven fabric (21) as a wet nonwoven fabric with small pores. On the other hand, the prior art forms a separate layer made of a hot melt adhesive between the first nonwoven fabric and the second nonwoven fabric, and there is a risk that if this is heat-pressed, the fine pores of the first nonwoven fabric, which is a wet nonwoven fabric, will be completely blocked. This makes it difficult to smoothly perform the filtering function of the filter due to the increase in differential pressure, and thus the first nonwoven fabric cannot be formed as a wet nonwoven fabric.

[0032] The second nonwoven fabric preparation step (S300) prepares a second nonwoven fabric (22) which is a dry nonwoven fabric. It is preferable that the second nonwoven fabric be formed to correspond to the area and shape of the first nonwoven fabric (21) so that it is laminated with the first nonwoven fabric (21) on both sides of the filling nonwoven fabric (10).

[0033] In addition, the filling nonwoven fabric (10) of the present invention is formed with a lower melting point material than the first nonwoven fabric (21) and the second nonwoven fabric (22). That is, the filling nonwoven fabric (10) is formed with a lower melting point material than the first nonwoven fabric (21) and the second nonwoven fabric (22), and is formed in a shape that is deflected and arranged in one direction, so that when heat-pressing is performed in the nonwoven fabric lamination step (S400), the floor portion of the filling nonwoven fabric (10) can perform the same operation as hot melt adhesive. That is, the filling nonwoven fabric (10) is formed in a shape where the fibers are deflected and arranged in one direction, so that a filling material containing a functional material is filled into the grooved pores, and at the floor, it melts at a lower temperature than the first nonwoven fabric (21) and the second nonwoven fabric (22) and is bonded through the role of a hot melt adhesive.

[0034] For example, the first nonwoven fabric (21) and the second nonwoven fabric (22) may be formed from PET having a melting point of about 250°C to 260°C, and the filling nonwoven fabric (10) may be formed from low-melting point polyester, polyethylene, polypropylene, etc. having a melting point of about 110°C to 160°C.

[0035] As described above, the filling nonwoven fabric (10) is formed of the same material as the first nonwoven fabric (21) and the second nonwoven fabric (22), and is laminated by an external adhesive method in which a fine powder-type hot melt adhesive is filled into the filling material, or by a self-adhesive method in which it is formed with a material with a lower melting point than the first nonwoven fabric (21) and the second nonwoven fabric (22).

[0036] In addition, the filling nonwoven fabric (10), the first nonwoven fabric (21), and the second nonwoven fabric (22) are wound with a certain length and run for lamination. This saves the waiting time for replacing the fabric including the filling nonwoven fabric (10), the first nonwoven fabric (21), and the second nonwoven fabric (22) compared to the operation of a single sheet through a roll-to-roll process, and maintains a constant tension so that the functional fabric can have a constant thickness and density in the longitudinal direction.

[0037] At this time, the present invention includes a tension control step for controlling the tension when driving for lamination of the wound filling nonwoven fabric (10), the first nonwoven fabric (21), and the second nonwoven fabric (22). The tension control step maintains a constant tension while driving the filling nonwoven fabric (10), the first nonwoven fabric (21), and the second nonwoven fabric (22), thereby preventing the filling nonwoven fabric (10), the first nonwoven fabric (21), and the second nonwoven fabric (22) from being damaged or broken by strong tension, in addition to the lamination operation at an accurate position.

[0038] In addition, the present invention includes a functional fabric cutting step (S500) that cuts the fabric to a selected shape and size after a nonwoven fabric lamination step (S400).

[0039] (Example 2-1) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 1-1, the filling nonwoven fabric preparation step (S100) comprises: a filling material preparation step (S110) for preparing a selected filling material; a filling nonwoven fabric driving step (S120) for driving a wound filling nonwoven fabric (10); and a filling material application step (S130) for applying a filling material to the filling nonwoven fabric (10).

[0040] (Example 2-2) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 2-1, the filler material preparation step (S110) comprises: a filler material selection step (S111) for selecting one or more of a hot melt adhesive in powder form and a functional material that are made of filler material; a filler material input amount control step (S112) for controlling the input amount of the filler material; a filler material mixing step (S113) for inputting and mixing the selected amount of the filler material into a hopper (110); and a filler material waiting step (S114) for keeping the mixed filler material waiting inside the hopper (110).

[0041] (Example 2-3) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 2-2, the filling material waiting step (S114) comprises: a filling material waiting step (S114-1) for stirring the inside of the hopper (110); and a filling material waiting step (S114-2) for dehumidifying the inside of the hopper (110).

[0042] (Example 2-4) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 2-1, the filling material application step (S130) includes a scattering application step (S131) ​​in which a filling material is dropped and applied through a scattering head (112).

[0043] (Example 2-5) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 2-1, the filling material application step (S130) includes an electrostatic application step (S132) for applying a filling material using electrostatic attraction.

[0044] (Example 2-6) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 2-1, the filling material application step (S130) comprises a fluid layer application step (S133) in which a filling material is suspended in the air to form a fluid layer and a filling nonwoven fabric is driven through the fluid layer to apply the filling material.

[0045] The filling nonwoven fabric preparation step (S100) includes a filling material preparation step (S110) for preparing a selected filling material; a filling nonwoven fabric driving step (S120) for driving the wound filling nonwoven fabric; and a filling material application step (S130) for applying a filling material to the filling nonwoven fabric.

[0046] The filler material preparation step (S110) prepares one or more fillers selected from powder-form hot melt adhesives and functional materials. At this time, the filler material preparation step (S110) includes a filler material selection step (S111), a filler material input amount control step (S112), a filler material mixing step (S113), and a filler material waiting step (S114).

[0047] The filling material selection step (S111) determines whether to select a functional material and a hot melt adhesive suitable for the purpose of the functional fabric. For example, when manufacturing a functional filter fabric, the filling material is selected by considering whether to add a hot melt adhesive when the filling nonwoven fabric (10) is combined with the first nonwoven fabric (21) and the second nonwoven fabric (22), along with the selection of a functional material suitable for the purpose, such as deodorization and antibacterial properties.

[0048] The filler material input amount control step (S112) controls the amount of filler material input to achieve an optimal balance of adhesive strength and functional material performance. The filler material input amount control step (S112) ensures that the selected filler material is input at an accurate ratio by using a quantitative device to precisely calculate the amount, thereby ensuring optimal adhesive strength and functional performance in the filling nonwoven fabric (10).

[0049] The filling material mixing step (S113) allows a selected amount of filling material to be introduced into the hopper (110) and mixed. At this time, the filling material mixing step (S113) ensures that the filling material introduced into and received into the hopper (110) is introduced precisely through a precision control device.

[0050] The filling material waiting step (S114) holds the filling material in the hopper (110) before it is applied in the filling material application step (S130). At this time, the filling material waiting step (S114) includes a filling material waiting stirring step (S114-1) in which the inside of the hopper (110) is stirred using a hopper stirrer (111), and a filling material waiting dehumidification step (S114-2) in which the inside of the hopper (110) is dehumidified.

[0051] The filling material atmospheric stirring step (S114-1) prevents the particles of the filling material being separated into layers when the filling material is introduced into the hopper (110) by stirring the filling material using a hopper stirrer (111) installed inside the hopper (110). In particular, the filling material atmospheric stirring step (S114-1) ensures that the hot melt adhesive powder is uniformly distributed on the surface of the functional material through stirring when the hot melt adhesive powder is introduced. By doing so, the loss of the effective specific surface area of ​​the functional material is minimized by ensuring that point contact occurs at localized areas during heat pressing in the nonwoven fabric lamination step (S400).

[0052] The packing material atmospheric dehumidification step (S114-2) performs dehumidification using a dehumidification device installed inside the hopper, thereby preventing packing material particles from clumping together due to moisture and preventing the deterioration of the packing material's function due to moisture.

[0053] The filling nonwoven fabric driving step (S120) drives the wound filling nonwoven fabric (10) at a selected speed using a transfer roller. Since a continuous process is possible through the filling nonwoven fabric preparation step (S100) and the filling nonwoven fabric driving step (S120), it is advantageous for mass production, which can lower manufacturing costs, and ensures that a uniform filling density of the filling material is maintained in the filling material application step (S130).

[0054] The filling material application step (S130) applies a filling material to the filling nonwoven fabric (10).

[0055] As an example of the filling material application step (S130), the filling material application step (S130) includes a scattering application step (S131) ​​in which a filling material in powder form is dropped and applied through a scattering head (112). The scattering application step (S131) ​​can precisely control the weight of the filling material scattered per unit area of ​​the filling nonwoven fabric (10) by adjusting the rotational speed of a stirring rotor located inside the scattering head (112).

[0056] As an example of the filling material application step (S130), the filling material application step (S130) includes an electrostatic application step (S132) that applies the filling material using electrostatic attraction. In the electrostatic application step (S132), an electric charge is applied to the filling material in powder form, and an electrode plate is placed at the bottom of the moving filling nonwoven fabric (10). Accordingly, the charged filling material moves toward the electrode plate, and through this, the filling material is applied to the filling nonwoven fabric (10) located between the electrode plates. Compared to the method of applying the filling material using only gravity, the electrostatic application step (S132) increases adhesion because particles of the filling material adhere to the filling nonwoven fabric (10). Through this, not only can the scattering of the powder-form filling material be prevented, but the filling material can also be applied uniformly to the filling nonwoven fabric (10).

[0057] As an example of the filling material application step (S130), the filling material application step (S130) includes a fluid layer application step (S133) in which the filling material is suspended in the air to form a fluid layer, and the filling nonwoven fabric (10) is driven through the fluid layer to apply the material. In the fluid layer application step (S133), air is supplied from below to suspend the powder-form filling material in the air to form a fluid layer. The fluid layer application step (S133) can apply the filling material not only to both sides of the filling nonwoven fabric (10) but also to the pores on the sides.

[0058] (Example 3-1) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 2-1, the filling nonwoven fabric preparation step (S100) includes a filling nonwoven fabric compression step (S140) for compressing the filling nonwoven fabric (10).

[0059] (Example 3-2) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 3-1, the filling nonwoven fabric compression step (S140) comprises a filling nonwoven fabric roller compression step (S141) in which the filling nonwoven fabric is compressed using a filling compression roller (113) made of a compression roller.

[0060] (Example 3-3) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 3-2, the filling nonwoven fabric roller compression step (S141) includes a filling nonwoven fabric roller pre-compression step (S141-1) that controls the temperature of the filling compression roller (113).

[0061] (Example 3-4) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 3-3, the filling nonwoven fabric roller pre-pressing step (S141-1) is controlled to have a temperature lower than the heat pressing temperature in the nonwoven fabric lamination step (S400).

[0062] (Examples 3-5) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 3-4, the roller pre-pressing step (S141-1) of the filling nonwoven fabric is pressed at a temperature 10°C to 30°C lower than the melting point of the hot melt adhesive and the filling nonwoven fabric.

[0063] (Example 3-6) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 3-1, the filling nonwoven fabric preparation step (S100) comprises a filling material penetration step (S135) including at least one selected from a filling material vibration penetration step (S135-1) that supplies vibration to the filling nonwoven fabric and a filling material suction penetration step (S135-2) that sucks air toward the lower direction of the filling nonwoven fabric, prior to the filling nonwoven fabric compression step (S140).

[0064] The filling nonwoven fabric preparation step (S100) includes a filling nonwoven fabric compression step (S140) in which a filling nonwoven fabric (10) coated with a filling material is compressed. The filling nonwoven fabric compression step (S140) physically compresses the filling nonwoven fabric (10) to increase the bonding strength between the filling material particles and the filling nonwoven fabric (10), and to ensure that the filling material is stably settled between the pores of the filling nonwoven fabric (10). This prevents the filling material from shifting in one direction or the filling material in the form of fine powder from scattering during the nonwoven fabric lamination step (S400), which is the driving and subsequent process of the filling nonwoven fabric (10).

[0065] The filling nonwoven fabric compression step (S140) includes a filling nonwoven fabric roller compression step (S141) in which the filling nonwoven fabric (10) is compressed using a filling compression roller (113) composed of a compression roller. The filling nonwoven fabric roller compression step (S141) physically compresses the filling nonwoven fabric (10) using filling compression rollers (113) located above and below the moving filling nonwoven fabric (10).

[0066] The filling nonwoven fabric roller compression step (S141) may include a filling nonwoven fabric roller preliminary compression step (S141-1) that controls the temperature of the filling compression roller (113). The filling nonwoven fabric roller preliminary compression step (S141-1) controls the filling compression roller (113) to have a constant temperature, thereby causing the hot melt adhesive or the filling nonwoven fabric (10) to have a constant viscosity. This increases the bonding strength between the filling nonwoven fabric (10) and the filling material.

[0067] At this time, the filling nonwoven fabric roller pre-pressing step (S141-1) is controlled to have a temperature lower than the heat pressing temperature in the nonwoven fabric lamination step (S400). For example, the filling nonwoven fabric roller pre-pressing step (S141-1) is compressed at a temperature 10°C to 30°C lower than the melting point of the hot melt adhesive and the filling nonwoven fabric (10). This prevents the hot melt adhesive and the filling nonwoven fabric (10) from melting excessively and thus prevents the adhesive strength from decreasing in the nonwoven fabric lamination step (S400).

[0068] In addition, the filling nonwoven fabric preparation step (S100) includes a filling material penetration step (S135) that includes at least one of the following selected steps: a filling material vibration penetration step (S135-1) that supplies vibration to the filling nonwoven fabric (10) before the filling nonwoven fabric compression step (S140), and a filling material suction penetration step (S135-2) that sucks air toward the bottom of the filling nonwoven fabric.

[0069] The filling material vibration penetration step (S135-1) lowers the filling material particles applied in the filling material application step (S130) by physically providing vibration to the filling nonwoven fabric (10) using a filling vibrator (114-1). At this time, the filling vibrator (114-1) can be formed as various devices capable of supplying vibration to the filling nonwoven fabric (10), such as a device that supplies vibration such as ultrasound, or a device that rotates on an axis so that its blades physically contact the filling nonwoven fabric (10) to supply vibration.

[0070] The filling material suction penetration step (S135-2) includes a chamber in which the filling nonwoven fabric (10) moves, and pulls the filling material particles applied in the filling material application step (S130) downward through a filling suction device (114-2) that sucks air from below. Through this, the filling material penetration step (S135) penetrates a functional material, which is one of the filling materials, deep inside the filling nonwoven fabric (10) so that the performance of the functional material is maximized.

[0071] As described above, the present invention includes a filling material penetration step (S135), thereby maximizing the purification efficiency of the functional material having a deodorizing function when the functional fabric of the present invention is used as a filter. In addition, when the filling material applied to the surface of the filling nonwoven fabric (10) is compressed in the filling nonwoven fabric compression step (S140), a film formation phenomenon occurs in which the particles of the filling material cover the entire outer surface of the filling nonwoven fabric (10), and consequently, pressure loss occurs. Accordingly, the present invention prevents pressure loss by allowing the filling material to penetrate and disperse through the pores of the filling nonwoven fabric (10) through the vibration material penetration step (S135). In addition, when hot melt adhesive powder is included in the filling material, the hot melt adhesive is introduced through the pores of the filling nonwoven fabric (10) and distributed evenly, thereby forming a point contact structure. Through this, the amount of hot melt adhesive used in the nonwoven fabric lamination step (S400) can be reduced, while the bonding strength with the first nonwoven fabric (21) and the second nonwoven fabric (22) can be increased.

[0072] (Example 4-1) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 1-1, the first nonwoven fabric preparation step (S200) comprises: a functional material mixture receiving step (S210) for receiving a selected functional material mixture in an immersion tank (200); a first nonwoven fabric driving step (S220) for driving the first nonwoven fabric (21); and a first nonwoven fabric immersion step (S230) for immersing the first nonwoven fabric (21) in an immersion tank (200).

[0073] (Example 4-2) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-1, the functional substance mixture receiving step (S210) comprises: a functional substance mixture preparation step (S211) for preparing a functional substance mixture having a selected concentration; and an immersion tank supply step (S212) for supplying a selected amount of the functional substance mixture to the immersion tank (200).

[0074] (Example 4-3) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-2, the functional material mixture preparation step (S211) comprises: a functional material mixture selection step (S211-1) for selecting a functional material and a solvent to form the functional material mixture; a functional material mixture formation step (S211-2) for forming a mixture by mixing the functional material and the solvent to have a selected concentration; and a functional material mixture stirring step (S211-3) for stirring the functional material mixture.

[0075] (Example 4-4) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-1, the first nonwoven fabric immersion step (S230) comprises: an immersion tank transmittance measurement step (S231) for measuring the transmittance of a functional material mixture contained in the immersion tank (200); and an immersion tank stirring step (S232) for stirring the functional material mixture contained in the immersion tank (200).

[0076] (Examples 4-5) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-4, the immersion tank stirring step (S232) includes one or more selected from the immersion tank wing stirring step, the immersion tank ultrasonic stirring step, and the immersion tank shear force stirring step, which stirs using a homogenizer.

[0077] (Example 4-6) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-1, the first nonwoven fabric immersion step (S230) comprises: an immersion tank state measurement step (S233) for measuring the level and concentration of a functional material mixture contained in the immersion tank (200); and an immersion tank state control step (S234) for controlling the level and concentration of a functional material mixture contained in the immersion tank (200).

[0078] (Example 4-7) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-6, the immersion tank state control step (S234) includes one or more selected from a functional material mixture replenishment step (S234-1) for introducing a functional material mixture into the immersion tank (200) and a functional material mixture circulation step (S234-2) for circulating the functional material mixture contained in the immersion tank (200).

[0079] (Examples 4-8) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-6, the first nonwoven fabric immersion step (S230) comprises: an immersion tank temperature measurement step (S235) for measuring the temperature of a functional material mixture contained in the immersion tank (200); and an immersion tank temperature control step (S236) for controlling the temperature of a functional material mixture contained in the immersion tank (200).

[0080] The first nonwoven fabric preparation step (S200) includes a functional material mixture receiving step (S210) for receiving a selected functional material mixture in an immersion tank (200); a first nonwoven fabric driving step (S220) for driving the first nonwoven fabric (21); and a first nonwoven fabric immersion step (S230) for immersing the first nonwoven fabric (21) in an immersion tank (200).

[0081] The functional substance mixture acceptance step (S210) includes a functional substance mixture preparation step (S211) for forming a functional substance mixture having a selected concentration to be accepted in an immersion tank (200), and an immersion tank supply step (S212) for supplying a selected amount of the functional substance mixture to the immersion tank (200).

[0082] The functional substance mixture preparation step (S211) forms a functional substance mixture having a selected concentration and receives it in a supply tank (210). At this time, the functional substance mixture preparation step (S211) includes a functional substance mixture selection step (S211-1), a functional substance mixture formation step (S211-2), and a functional substance mixture stirring step (S211-3).

[0083] The functional material mixture selection step (S211-1) selects the functional material and solvent constituting the functional material mixture. The functional material mixture selection step (S211-1) selects at least one functional material suitable for an object manufactured using the functional fabric. For example, when manufacturing a functional fabric for the production of a filter, at least one functional material capable of antibacterial and deodorizing operations is selected. Additionally, the functional material mixture selection step (S211-1) selects a solvent, such as water or alcohol, to form the mixture.

[0084] The functional substance mixture formation step (S211-2) forms a mixture by mixing a functional substance and a solvent to have a selected concentration. The functional substance mixture formation step (S211-2) forms a functional substance mixture having a selected concentration so that it is not only smoothly absorbed into the first nonwoven fabric (21) but also exhibits optimal performance suitable for the manufacturing purpose. To this end, the functional substance mixture formation step (S211-2) forms a functional substance mixture having a selected concentration by introducing a selected amount of functional substance and solvent into the supply tank (210) and mixing them. At this time, it is preferable that the functional substance mixture formation step (S211-2) forms the mixture by precisely controlling the ratio of the solvent and the solute using a mass spectrometry sensor.

[0085] The functional substance mixture stirring step (S211-3) stirs the functional substance mixture. The functional substance mixture stirring step (S211-3) ensures that the functional substance particles are uniformly distributed and prevents the particles from clumping together. This prevents the formation of precipitates caused by the clumping of functional substance particles inside the supply tank (210) over time. The functional substance mixture stirring step (S211-3) performs the stirring operation of the functional substance mixture using a supply tank stirrer (211) installed inside the supply tank (210). The supply tank stirrer (211) can be formed as a device that stirs by means of a rotating blade, or as a device that stirs by generating ultrasonic waves, among other various devices.

[0086] The immersion tank supply step (S212) supplies the functional substance mixture prepared in the functional substance mixture preparation step (S211) into the immersion tank (200) in a selected amount. The immersion tank supply step (S212) may supply the functional substance mixture contained in the supply tank (210) into the immersion tank (200) using a pump. At this time, it is desirable to prevent the occurrence of vortices inside the immersion tank (200) by controlling the discharge pressure of the pump.

[0087] The first nonwoven fabric immersion step (S230) includes an immersion tank transmittance measurement step (S231) for measuring the transmittance of a functional material mixture contained in an immersion tank (200), and an immersion tank stirring step (S232) for stirring the functional material mixture contained in the immersion tank (200).

[0088] The immersion tank transmittance measurement step (S231) measures the amount of light transmitted by irradiating a light source onto a functional material mixture contained in an immersion tank (200) using a transmittance sensor. Through this, the immersion tank transmittance measurement step (S231) measures the particle state of the functional material in real time by measuring the transmittance.

[0089] The immersion tank stirring step (S232) stirs the particles of the functional material settled inside the immersion tank (200) by causing them to float when the transmittance measured in the immersion tank transmittance measurement step (S231) is greater than or equal to a preset value. This ensures that the functional material mixture has a certain concentration and maintains the selected size of the particles of the functional material. That is, by maintaining a particle size distribution where the particle size of the functional material is always smaller than the pores of the first nonwoven fabric (21) made of wet nonwoven fabric, the particles of the functional material are allowed to smoothly penetrate into the first nonwoven fabric (21) when the first nonwoven fabric (21) is immersed in the immersion tank (200).

[0090] At this time, the immersion tank stirring step (S232) is performed by stirring using an immersion tank stirrer (201) comprising a stirring blade, an ultrasonic stirring device, a homogenizer, etc. Accordingly, the immersion tank stirring step (S232) of the present invention includes one or more selected from the immersion tank blade stirring step, which stirs with a stirring blade; the immersion tank ultrasonic stirring step, which stirs by supplying ultrasonic waves; and the immersion tank shear force stirring step, which stirs using a homogenizer.

[0091] Additionally, the first nonwoven fabric immersion step (S230) includes an immersion tank state measurement step (S233) for measuring the water level and concentration of the functional substance mixture contained in the immersion tank (200), and an immersion tank state control step (S234) for controlling the water level and concentration of the functional substance mixture contained in the immersion tank (200).

[0092] That is, when the first nonwoven fabric (21) is immersed in and passes through the immersion tank (200), it travels while continuously holding the functional material mixture. Accordingly, the water level of the immersion tank (200) is continuously lowered, which shortens the travel distance of the first nonwoven fabric (21) immersed in the immersion tank (200) and reduces the immersion time. In addition, when the first nonwoven fabric (21) travels while holding the functional material mixture, the consumption rate of the functional material particles and the solvent differs, and thus the concentration of the functional material mixture contained inside the immersion tank (200) changes. Furthermore, during a long process, the concentration of the functional material mixture increases due to evaporation, and the viscosity increases accordingly.

[0093] Accordingly, the first nonwoven fabric immersion step (S230) measures the level and concentration of the functional material mixture contained in the immersion tank (200) in real time during the immersion tank state measurement step (S233), and controls the level and concentration of the functional material mixture contained in the immersion tank (200) in real time during the immersion tank state control step (S234), thereby ensuring that the functional material mixture contained inside the immersion tank (200) maintains a preset level and concentration. Through this, the quality of the first nonwoven fabric (21) is made uniform, and the loss of fabric discarded due to concentration imbalance is minimized. In addition, by preventing the pores of the first nonwoven fabric (21) from closing due to an increased concentration of the functional material mixture, the breathability of the first nonwoven fabric (21) is maintained.

[0094] At this time, the immersion tank state measurement step (S233) can measure the water level of the functional substance mixture using a level sensor and measure the concentration of the functional substance mixture using a concentration sensor.

[0095] The immersion tank state control step (S234) includes one or more selected from the functional substance mixture replenishment input step (S234-1) for introducing the functional substance mixture into the immersion tank (200) and the functional substance mixture circulation step (S234-2) for circulating the functional substance mixture contained within the immersion tank (200).

[0096] In the functional substance mixture replenishment step (S234-1), a water level sensor formed in the immersion tank (200) detects the water level in real time, and when the water level falls below a preset level, the functional substance mixture is replenished from the supply tank (210). Since the functional substance mixture replenishment step (S234-1) maintains the water level of the immersion tank (200) constant by replenishing the functional substance mixture from the supply tank (210) in real time, the depth and time for which the first nonwoven fabric (21) is submerged in the immersion tank (200) are maintained constant.

[0097] The functional substance mixture circulation step (S234-2) continuously circulates the functional substance mixture contained within the immersion tank (200) to the supply tank (210) using a circulation pump. In addition to simply replenishing the functional substance mixture into the immersion tank (200), the mixture is replenished into the immersion tank (200) to reach a preset water level after being stirred in the supply tank (210), thereby preventing the phenomenon where the concentration increases only within a certain area for a certain period of time when the functional substance mixture is replenished into the immersion tank (200).

[0098] In addition, the first nonwoven fabric immersion step (S230) includes an immersion tank temperature measurement step (S235) for measuring the temperature of the functional material mixture contained in the immersion tank (200), and an immersion tank temperature control step (S236) for controlling the temperature of the functional material mixture contained in the immersion tank (200).

[0099] When the temperature of the functional material mixture contained within the immersion tank (200) decreases, the viscosity increases, and the rate at which particles penetrate into the pores of the first nonwoven fabric (21), which is made of wet nonwoven fabric, slows down. Conversely, when the temperature increases, the concentration of the functional material mixture may change rapidly. In other words, the temperature of the functional material mixture must be kept constant so that the particles of the functional material penetrate into the first nonwoven fabric (21) at a constant rate. Also, if the temperature of the functional material mixture deviates from a specific value, collisions between the particles of the functional material become frequent, which may cause aggregation or sedimentation.

[0100] To prevent this, the first nonwoven fabric immersion step (S230) maintains a constant temperature of the functional material mixture through the immersion tank temperature measurement step (S235) and the immersion tank temperature control step (S236), thereby ensuring that the amount of functional material absorbed by the first nonwoven fabric (21) is even, and the first nonwoven fabric (21) can be manufactured to exhibit consistent performance even with external temperature changes due to seasonal changes, etc. In addition, by preventing the pores of the first nonwoven fabric (21) from closing due to increased viscosity, the pore retention and air permeability of the first nonwoven fabric (21) are optimized when manufactured into a filter.

[0101] The immersion tank temperature measurement step (S235) measures the temperature of the functional material mixture using a temperature sensor. At this time, the immersion tank temperature measurement step (S235) preferably measures the temperature of the functional material mixture by installing temperature sensors at at least two locations, such as the inlet side, the center side, and the outlet side of the immersion tank (200), to account for the temperature deviation in the large immersion tank (200).

[0102] The immersion tank temperature control step (S236) consists of a heat exchanger, etc., capable of heating and cooling the functional material mixture contained in the immersion tank (200). At this time, the immersion tank temperature control step (S236) includes a circulation pump that circulates the functional material mixture contained inside the immersion tank (200) internally, so that the temperature distribution of the functional material mixture contained inside the immersion tank (200) is uniform.

[0103] (Ep. 5-1) The present invention relates to a method for manufacturing a functional fabric, wherein in Embodiment 4-1, the first nonwoven fabric preparation step (S200) comprises: a first nonwoven fabric dehydration step (S240) for dehydrating the first nonwoven fabric (21); and a first nonwoven fabric drying step (S250) for drying the first nonwoven fabric (21).

[0104] (Example 5-2) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 5-1, the first nonwoven fabric dewatering step (S240) includes a first nonwoven fabric compression dewatering step (S241) in which the first nonwoven fabric (21) is compressed to dewater.

[0105] (Example 5-3) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 5-2, the first nonwoven fabric compression dewatering step (S241) includes a first nonwoven fabric compression dewatering control step that controls the pressure applied to the first nonwoven fabric (21) to compress it.

[0106] (Example 5-4) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 5-1, the first nonwoven fabric dewatering step (S240) comprises a first nonwoven fabric vibration dewatering step (S242) in which vibration is supplied to the first nonwoven fabric (21) to dewater it.

[0107] (Example 5-5) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 5-1, the first nonwoven fabric drying step (S250) comprises a first nonwoven fabric non-contact drying step (S251) in which one or more selected from hot air and infrared rays are supplied to the first nonwoven fabric (21) through a nonwoven fabric dryer (240) to dry it.

[0108] (Examples 5-6) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 5-5, the first nonwoven fabric drying step (S250) comprises a first nonwoven fabric drying step (S252) in which the nonwoven fabric dryer (240) is spaced apart from at least two others in the direction of travel of the first nonwoven fabric (21), and the temperature of the heat source is increased as it progresses in the direction of travel of the first nonwoven fabric (21).

[0109] The first nonwoven fabric preparation step (S200) includes a first nonwoven fabric dehydration step (S240) for dehydrating the first nonwoven fabric (21) that travels after being immersed in the immersion tank (200); and a first nonwoven fabric drying step (S250) for drying the first nonwoven fabric (21).

[0110] As an example of the first nonwoven fabric dehydration step (S240), the first nonwoven fabric dehydration step (S240) includes a first nonwoven fabric compression dehydration step (S241) in which the first nonwoven fabric (21) is compressed to dehydrate it. The first nonwoven fabric compression dehydration step (S241) passes the first nonwoven fabric (21), which is immersed, between a nonwoven fabric compression roller (231) consisting of a pair of mangle rollers, and discharges the solvent inside the first nonwoven fabric (21) through compression by the nonwoven fabric compression roller (231).

[0111] At this time, the first nonwoven fabric compression and dehydration step (S241) further includes a first nonwoven fabric compression and dehydration control step (S241-1) that controls the pressure applied by a nonwoven fabric compression roller (231) consisting of a pair of mangle rollers. The first nonwoven fabric compression and dehydration control step controls the pressure applied to the first nonwoven fabric (21) to prevent rapid discharge of solvent and to prevent damage to the first nonwoven fabric (21).

[0112] As another example of the first nonwoven fabric dehydration step (S240), the first nonwoven fabric dehydration step (S240) includes a first nonwoven fabric vibration dehydration step (S242) that supplies vibration to the first nonwoven fabric (21). The first nonwoven fabric vibration dehydration step (S242) is formed by a nonwoven fabric vibrator (232) comprising a vibration element formed on the nonwoven fabric compression roller (231) to generate ultrasonic waves, a vibrating plate disposed below the first nonwoven fabric (21) to supply vibration to the first nonwoven fabric (21), and a rotating blade that applies vibration through physical contact. The first nonwoven fabric vibration dehydration step (S242) supplies vibration to the first nonwoven fabric (21) using a nonwoven fabric vibrator (232), thereby scattering the solvent trapped inside the pores of the first nonwoven fabric (21) or moving the solvent to the surface of the first nonwoven fabric (21) to dehydrate it. In particular, the first nonwoven fabric vibration dehydration step (S242) supplies vibration evenly to the first nonwoven fabric (21), thereby ensuring even dehydration not only in the up-down direction but also in the left-right direction of the first nonwoven fabric (21).

[0113] The first nonwoven fabric drying step (S250) dries the first nonwoven fabric (21) from which the solvent has been dehydrated in the first nonwoven fabric dehydration step (S240) to remove the solvent, thereby preventing interference with the lamination operation in the nonwoven fabric lamination step (S400), which is a subsequent process in the driving direction.

[0114] At this time, the first nonwoven fabric drying step (S250) includes a first nonwoven fabric non-contact drying step (S251) in which a nonwoven fabric dryer (240) supplies one or more selected from hot air and infrared rays to the first nonwoven fabric (21) through a heat source device. The first nonwoven fabric non-contact drying step (S251) supplies a heat source to the first nonwoven fabric (21) in a non-contact manner through a nonwoven fabric dryer (240) that includes a hot air blower, an infrared heater, etc. That is, by supplying the heat source evenly to the first nonwoven fabric (21), damage to the fibers of the first nonwoven fabric (21) due to the concentration of the heat source is prevented.

[0115] Additionally, the first nonwoven fabric drying step (S250) includes a first nonwoven fabric drying step (S252) in which the temperature of the heat source is increased as the first nonwoven fabric (21) moves in the direction of travel, and the first nonwoven fabric drying step (S252) is formed by arranging at least two nonwoven fabric dryers (240) apart from each other in the direction of travel of the first nonwoven fabric (21). In the first nonwoven fabric drying step (S252), the first nonwoven fabric dryer (240) that encounters the moving first nonwoven fabric (21) is supplied with a heat source at a relatively low temperature, and the nonwoven fabric dryers (240) separated in the direction of travel of the first nonwoven fabric (21) are supplied with a heat source at a high temperature in stages. Through this, the evaporation rate of the solvent can be easily controlled. That is, it prevents the phenomenon in which particles of the functional material may accumulate on the surface when the first nonwoven fabric (21) is rapidly dried using a high-temperature heat source. This allows the particles of the functional material to be uniformly fixed inside the first nonwoven fabric (21). This ensures that the particles of the functional material are strongly fixed to the first nonwoven fabric (21), thereby preventing the particles of the functional material from being scattered by strong winds when manufactured into a filter.

[0116] (Example 6-1) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 4-1, the first nonwoven fabric preparation step (S200) includes an air pocket removal step (S225) for removing air within the pores of the first nonwoven fabric (21) before the first nonwoven fabric immersion step (S230).

[0117] (Example 6-2) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 6-1, the air pocket removal step (S225) includes an air pocket compression removal step (S225-1) that compresses the first nonwoven fabric (21).

[0118] (Example 6-3) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 6-1, the air pocket removal step (S225) comprises an air pocket vibration removal step (S225-2) that supplies vibration to the first nonwoven fabric (21).

[0119] (Example 6-4) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 6-1, the air pocket removal step (S225) includes an air pocket suction removal step (S225-3) for suctioning the first nonwoven fabric (21).

[0120] (Example 6-5) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 6-1, the air pocket removal step (S225) includes an air pocket heating removal step (S225-4) for preheating the first nonwoven fabric (21).

[0121] (Example 6-6) The present invention relates to a method for manufacturing a functional fabric, wherein in Example 1-1, the second nonwoven fabric preparation step (S300) includes a second nonwoven fabric driving step (S310) for driving the second nonwoven fabric (22).

[0122] The first nonwoven fabric preparation step (S200) includes an air pocket removal step (S225) for removing air within the pores of the first nonwoven fabric (21) before the first nonwoven fabric immersion step (S230).

[0123] The air pocket removal step (S225) increases the exchange efficiency with the liquid functional material mixture absorbed by the first nonwoven fabric (21) by removing air from within the pores of the first nonwoven fabric (21) before the first nonwoven fabric (21) is immersed in the immersion tank (200) in the first nonwoven fabric immersion step (S230). That is, by preventing the phenomenon in which air remaining in the pores of the first nonwoven fabric (21) blocks the entry of the functional material mixture absorbed into the pores, the functional material mixture is allowed to be absorbed smoothly and evenly into the pores of the first nonwoven fabric (21).

[0124] As an example of the air pocket removal step (S225), the air pocket removal step (S225) includes an air pocket compression removal step (S225-1) that removes air within the pores by compressing the first nonwoven fabric (21). The air pocket compression removal step (S225-1) forcibly discharges air remaining within the pores of the first nonwoven fabric (21) to the outside of the first nonwoven fabric (21) by compressing the first nonwoven fabric (21) with a constant pressure while passing the first nonwoven fabric (21) through an air removal compression roller (251) made of compression rollers. In particular, the air pocket compression removal step (S225-1) causes the functional material mixture in the immersion tank (200) to be absorbed deep inside the first nonwoven fabric (21) by the negative pressure generated during the process in which the thickness of the first nonwoven fabric (21) is compressed by the air removal compression roller (251) and then restored.

[0125] As an example of the air pocket removal step (S225), the air pocket removal step (S225) includes an air pocket vibration removal step (S225-2) that removes air within the pores by supplying vibration to the first nonwoven fabric (21). The air pocket vibration removal step (S225-2) uses an air removal vibrator (252), which is a vibration device that supplies ultrasound or the like to the first nonwoven fabric (21), to cause the first nonwoven fabric (21) to vibrate finely, thereby scattering the air remaining in the first nonwoven fabric (21) to the outside by the vibration. Since the air pocket vibration removal step (S225-2) can remove even microbubbles attached to the first nonwoven fabric (21), the functional material mixture is smoothly absorbed into the first nonwoven fabric (21).

[0126] As an example of the air pocket removal step (S225), the air pocket removal step (S225) includes an air pocket suction removal step (S225-3) that removes air within the pores by suctioning the first nonwoven fabric (21). The air pocket suction removal step (S225-3) extracts air remaining within the pores of the first nonwoven fabric (21) by using an air removal suction device (253) that sucks in the first nonwoven fabric (21) passing through an adsorption guide in which a vacuum slot is formed at the bottom. The air pocket adsorption removal step (S225-3) creates a vacuum inside the first nonwoven fabric (21) and then introduces it into an immersion tank (200), thereby allowing the functional material mixture to be absorbed into the first nonwoven fabric (21) very quickly and uniformly.

[0127] As an example of the air pocket removal step (S225), the air pocket removal step (S225) includes an air pocket heating removal step (S225-4) in which the first nonwoven fabric (21) is heated to remove air within the pores. In the air pocket heating removal step (S225-4), the first nonwoven fabric (21) is preheated using an air control heater (254), such as a heating roller or an infrared heater, before being immersed in the immersion tank (200). Through this, the air remaining in the pores of the first nonwoven fabric (21) undergoes thermal expansion and is pushed out of the first nonwoven fabric (21) to be discharged. In the air pocket heating removal step (S225-4), the first nonwoven fabric (21) is preheated to remove air, and then immersed in an immersion tank (200) with a relatively low temperature. This causes the pores of the first nonwoven fabric (21) to contract and attract liquid, thereby increasing the penetration power of the functional material mixture.

[0128] (Example 7-1) The present invention relates to a method for manufacturing a functional fabric, and in Example 1-1, includes a meltblown nonwoven fabric attachment step (S600) of attaching a meltblown nonwoven fabric (30) to the first nonwoven fabric (21).

[0129] The present invention includes a meltblown nonwoven fabric attachment step (S600) in which a meltblown nonwoven fabric (30) is attached to a first nonwoven fabric (21). By attaching the meltblown nonwoven fabric (30) to the first nonwoven fabric (21) in the meltblown nonwoven fabric attachment step (S600), fine particles such as ultrafine dust and viruses, which are the inherent functions of the meltblown nonwoven fabric (30), can be filtered. The meltblown nonwoven fabric attachment step (S600) may be performed by attaching the meltblown nonwoven fabric (30) to the first nonwoven fabric (21) after the nonwoven fabric lamination step (S400), or by attaching the meltblown nonwoven fabric (30) to the first nonwoven fabric (21) in correspondence with the cut shape after the functional fabric cutting step (S500).

[0130] At this time, the meltblown nonwoven fabric (30) is attached to the first nonwoven fabric (21) to form a protective layer that comes into contact with the external environment first, thereby preventing the surface of the fabric from being corroded or deformed depending on the properties (strong acid or strong base) of the solvent constituting the functional material mixture, and maximizing moldability.

[0131] In addition, the meltblown nonwoven fabric (30) can form a folded peak of accurate dimensions by ensuring friction with the folding blade during the folding process, thereby preventing dimensional errors caused by the folding blade's slippage.

[0132] In addition, the first nonwoven fabric (21) can be hardened to become too stiff by immersion in a functional material mixture and drying, or conversely, can be softly hardened to become mushy due to the influence of a solvent, and by supplementing the bending rigidity of the entire functional fabric through the meltblown nonwoven fabric (30), it performs the function of a molding support that prevents the fabric from tearing at the folded part and maintains the sharp fold shape.

[0133] (Example 8-1) The present invention relates to a functional fabric, and is manufactured by a method for manufacturing a functional fabric as described in any one of Examples 1-1 to 7-1. Explanation of the symbols

[0134] S100: Preparation step for filling nonwoven fabric S110: Preparation step for filling material S111: Filling material sorting step S112: Filling material input amount control step S113: Filling material mixing stage S114: Filling material waiting stage S114-1: Atmospheric stirring step for packing material S114-2: Atmospheric dehumidification step for packing material S120: Non-woven fabric driving stage S130: Filling material application stage S131: Scattering coating step S132: Electrostatic coating step S133: Fluidized bed coating step S135: Filler material infiltration step S135-1: Vibration penetration stage of filler material S135-2: Suction penetration stage of filler material S140: Filling nonwoven fabric compression step S141: Filling nonwoven fabric roller compression step S141-1 : Roller pre-compression step for filling nonwoven fabric S200: First nonwoven fabric preparation step S210: Functional material mixture reception step S211: Preparation step for functional substance mixture S211-1 : Functional substance mixture selection step S211-2 : Functional substance mixture formation step S211-3 : Functional substance mixture stirring step S212: Immersion tank supply stage S220: First nonwoven fabric driving stage S225: Air pocket removal step S225-1: Air pocket compression removal step S225-2: Air pocket vibration removal step S225-3: Air pocket suction removal step S225-4: Air pocket heating removal step S230: First nonwoven fabric immersion step S231: Immersion tank transmittance measurement step S232: Immersion tank stirring step S233: Immersion tank state measurement step S234: Immersion tank state control step S234-1 : Functional substance mixture replenishment step S234-2 : Functional substance mixture circulation stage S235: Immersion tank temperature measurement step S236: Immersion tank temperature control step S240: First nonwoven fabric dehydration step S241: First nonwoven fabric compression dehydration step S242: First nonwoven fabric vibration dehydration step S250: First nonwoven fabric drying step S251: First non-woven fabric non-contact drying step S252: First non-woven fabric drying step S300: Second nonwoven fabric preparation stage S310: First nonwoven fabric driving stage S400: Non-woven fabric lamination stage S500: Functional fabric cutting stage S600: Meltblown nonwoven fabric attachment step 10 : Filling nonwoven fabric 21 : First nonwoven fabric 22 : 2nd nonwoven fabric 30 : Meltblown nonwoven fabric 110 : Hopper 111 : Hopper stirrer 112: Scattering head 113: Filling compression roller 114-1 : Filling vibrator 114-2 : Filling suction device 200 : Immersion tank 201 : Immersion tank stirring device 210 : Supply tank 211 : Supply tank stirrer 231 : Non-woven fabric compression roller 232 : Non-woven fabric vibrator 233 : Non-woven fabric dryer 251 : Air removal compression roller 252 : Air removal vibrator 253 : Air removal suction device 254 : Air removal heater

Claims

Claim 1 A method for manufacturing a functional fabric comprising: a filling nonwoven fabric preparation step (S100) in which a filling nonwoven fabric (10) is filled with a powder-form filling material including one or more selected from a hot melt adhesive and a functional material; a first nonwoven fabric preparation step (S200) in which a first nonwoven fabric (21) is immersed in a functional material mixture formed by mixing a powder-form functional material and a solvent; a second nonwoven fabric preparation step (S300) in which a second nonwoven fabric (22) is prepared; and a nonwoven fabric lamination step (S400) in which the first nonwoven fabric (21) and the second nonwoven fabric (22) are laminated by heat pressing on both sides of the filling nonwoven fabric (10); wherein the first nonwoven fabric preparation step (S200) comprises a functional material mixture receiving step (S210) in which a selected functional material mixture is received in an immersion tank (200); The first nonwoven fabric driving step (S220) for driving the first nonwoven fabric (21); the first nonwoven fabric immersion step (S230) for immersing the first nonwoven fabric (21) in an immersion tank (200); the first nonwoven fabric dehydration step (S240) for dehydrating the first nonwoven fabric (21); and the first nonwoven fabric drying step (S250) for drying the first nonwoven fabric (21); wherein the functional substance mixture receiving step (S210) is formed by a functional substance mixture preparation step (S211) for preparing a functional substance mixture having a selected concentration; and an immersion tank supply step (S212) for supplying a selected amount of the functional substance mixture to the immersion tank (200); and wherein the functional substance mixture preparation step (S211) is formed by a functional substance mixture selection step (S211-1) for selecting a functional substance and a solvent constituting the functional substance mixture; A method for manufacturing a functional fabric comprising: a functional material mixture forming step (S211-2) of mixing a functional material and a solvent to form a mixture having a selected concentration; a functional material mixture stirring step (S211-3) of stirring the functional material mixture; and the first nonwoven fabric immersion step (S230) comprising: an immersion tank transmittance measuring step (S231) of measuring the transmittance of the functional material mixture contained in the immersion tank (200); and an immersion tank stirring step (S232) of stirring the functional material mixture contained in the immersion tank (200). Claim 2 In claim 1, the filling nonwoven fabric preparation step (S100) comprises: a filling material preparation step (S110) for preparing a selected filling material; a filling nonwoven fabric driving step (S120) for driving a wound filling nonwoven fabric (10); and a filling material application step (S130) for applying a filling material to the filling nonwoven fabric (10). Claim 3 In claim 2, the filling nonwoven fabric preparation step (S100) comprises a filling nonwoven fabric compression step (S140) for compressing the filling nonwoven fabric (10); a method for manufacturing a functional fabric. Claim 4 delete Claim 5 delete Claim 6 A method for manufacturing a functional fabric according to claim 1, wherein the first nonwoven fabric preparation step (S200) includes an air pocket removal step (S225) for removing air within the pores of the first nonwoven fabric (21) before the first nonwoven fabric immersion step (S230). Claim 7 A method for manufacturing a functional fabric comprising, in claim 1, a meltblown nonwoven fabric attachment step (S600) of attaching a meltblown nonwoven fabric (30) to the first nonwoven fabric (21). Claim 8 A functional fabric manufactured by a method for manufacturing a functional fabric as described in any one of Paragraphs 1, 2, 3, 6, and 7.

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