KR102620862B1 - Antimicrobial copper double filter and Manufacturing method of the same - Google Patents

Abstract

The present invention relates to an antibacterial copper double composite filter and a method of manufacturing the same, and more specifically, to an antibacterial copper double composite filter that includes an antibacterial copper net and has excellent dust collection efficiency, antibacterial, deodorizing (deodorizing), antiviral, and antifungal properties. It relates to filters and methods of manufacturing them.

Description

Antimicrobial copper double composite filter and manufacturing method of the same {Antimicrobial copper double filter and Manufacturing method of the same}

The present invention relates to an antibacterial copper double composite filter and a method of manufacturing the same. More specifically, it includes an antibacterial copper net and a HEPA filter containing nickel, copper and/or copper alloy, and has excellent dust collection efficiency, The present invention relates to an invention to provide an antibacterial copper double composite filter that also has excellent deodorizing (deodorizing), anti-mold, anti-viral, and anti-bacterial properties.

There are numerous casualties around the world due to the COVID-19 virus outbreak. For this reason, masks have recently become a necessity for people. However, the actual mask materials used, such as non-woven fabric and melt blown filter (MB Filter), only filter out fine dust and viruses and do not eradicate viruses, bacteria, mold, and various deodorizing pathogens. The reality is that people's health is deteriorating and living environments are deteriorating, emerging as a major social problem.

In addition, although the standard of living has improved and the quality of life has improved due to industrialization, the desire to improve indoor air quality is increasing due to worsening indoor and outdoor air quality, and sales of expensive antibacterial functional products are rapidly increasing.

As a result, the development of air purifiers, system air conditioner filters, automobile cabin filters, and mask filters has increased, and the human health and indoor environment improvement industry is in the stage of full-fledged growth.

However, sterilization, sterilization, and disinfection using conventional chemicals or heat treatment to remove airborne microorganisms (molds, infectious pathogens, etc. present in the air) existing in enclosed indoor spaces is difficult to achieve a 99% antibacterial effect and is not sustainable. There is no such thing.

In addition, the antibacterial products developed to date have limitations in removing various bacteria and infectious pathogens present in daily life. Furthermore, antibacterial copper is used in non-woven fabrics used in masks, air purifiers to improve indoor air in cars, and car filters. (Copper and copper alloy) technology has not been developed.

Accordingly, the present applicant has registered Korean Patent Publication No. 10-2267617, “Filter and method of manufacturing the same,” and Republic of Korea Patent Publication No. 10-2395908, “Fabric mixed with copper wires and method of manufacturing fabric using the fabric,” Republic of Korea. Based on the experience of applying for Registered Patent Publication No. 10-2396477, “Knitted fabric for heating mixed with copper wire and method of manufacturing fabric using the knitted fabric,” etc., Antimicrobial Copper combines the antibacterial effect of copper and Focusing on the effect of blocking water waves or electromagnetic waves, research was conducted on the 'antibacterial copper double composite filter and its manufacturing method', which not only has antibacterial, deodorizing, antiviral, and anti-fungal functions, but can also block water waves and electromagnetic waves. Development continues.

Republic of Korea Patent Publication No. 10-2267617 (announcement date 2021.06.21.) Republic of Korea Patent Publication No. 10-2395908 (announcement date 2022.05.09.) Republic of Korea Patent Publication No. 10-2396477 (announcement date 2022.05.19.)

The present invention was created to solve the problems of the prior art as described above. The purpose of the present invention is to provide an antibacterial copper double composite filter with excellent dust collection efficiency and excellent antibacterial properties, and a method for manufacturing the same.

The method of manufacturing the antibacterial copper double composite filter of the present invention to solve the above problems includes the first step of preparing a first nonwoven fabric, an antibacterial copper net, a first meltblown nonwoven fabric, and a HEPA filter, respectively; A second step of combining the first non-woven fabric, the anti-bacterial copper net, the melt-blown non-woven fabric, and the HEPA filter at the same time to produce an integrated laminate in which the first non-woven fabric, the anti-bacterial copper net, the melt-blown non-woven fabric, and the HEPA filter are sequentially laminated; and a third step of performing a bending and hot melt process on the two-step laminated paper.

In addition, further stripping work can be performed to suit the product to which the manufactured composite filter is to be applied.

In addition, the present invention is an antibacterial copper double composite filter manufactured by the above manufacturing method, which is a composite filter in which a first nonwoven fabric, an antibacterial copper net, a first meltblown nonwoven fabric, and a HEPA filter are sequentially laminated and integrated, and the HEPA filter The second nonwoven fabric and the second meltblown nonwoven fabric may be laminated.

Additionally, the antibacterial copper double composite filter of the present invention may be a pleated filter.

In addition, the antibacterial copper double composite filter of the present invention can be used in air cleaner filters, electric car (KTX, SRT, etc.) dust collection filters, warship and submarine dust collection filters, and automobile filters.

In the present invention, the term 'fiber' used means 'yarn' or 'thread' and refers to various types of typical yarns and fibers.

The antibacterial copper double composite filter manufactured by the method of the present invention not only has excellent dust collection efficiency and excellent antibacterial, deodorizing, antiviral, and antifungal properties, but also has the additional effect of blocking water pulse waves and electromagnetic waves. .

Figure 1 is a conceptual diagram schematically showing a method of manufacturing an antibacterial copper double composite filter according to an embodiment of the present invention.
Figure 2 is a conceptual diagram showing a cross section of a filter according to an embodiment of the present invention.
Figure 3 is a photograph taken of the antibacterial copper double composite filter manufactured in Example 1.
Figure 4 shows the antibacterial property measurement results of the antibacterial copper double composite filter manufactured in Example 1, measured at the request of the Korea Testing and Research Institute.
Figure 5 shows the antiviral measurement results of the antibacterial copper double composite filter manufactured in Example 1, measured at the request of the Korea Testing and Research Institute.
Figures 6a to 6c show the results of a deodorization test of the antibacterial copper double composite filter manufactured in Example 1, measured at the request of the Korea Testing and Research Institute.
Figures 7a and 7b show the anti-fungal properties of the antibacterial copper double composite filter manufactured in Example 1 measured at the request of the Korea Testing and Research Institute.
Figures 8a to 8c show the results of measuring the breathability and dust collection amount of the antibacterial copper double composite filter manufactured in Example 1, measured at the request of the Korea Institute of Industrial Technology.

The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In this specification, when adding reference numbers to components in each drawing, it should be noted that identical components are given the same number as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

The detailed description below will be described in detail together with the drawings shown below.

The antibacterial copper double composite filter of the present invention is manufactured by the method as schematically shown in Figure 1. To explain this in more detail, the manufacturing method of the antibacterial copper mesh filter of the present invention includes a first nonwoven fabric, an antibacterial copper mesh, Step 1 of preparing the first meltblown nonwoven fabric and HEPA filter, respectively; A second step of combining the first non-woven fabric, anti-bacterial copper net, melt-blown non-woven fabric, and HEPA filter at the same time to produce an integrated laminate in which the first non-woven fabric, anti-bacterial copper net, melt-blown non-woven fabric, and HEPA filter are sequentially laminated; and a third step of performing a bending and hot melt process on the two-step laminate. By performing a process including, an antibacterial copper double composite filter having a cross-sectional structure schematically shown in FIG. 2 can be manufactured.

First, in the first step of the manufacturing method of the present invention, the first nonwoven fabric (support) 10, the antibacterial copper net 20, the first meltblown nonwoven fabric 30, and the HEPA filter can be prepared, respectively.

In the present invention, the first nonwoven fabric (support) 10 may be composed of low melting point polyester (PE) fibers. At this time, the low melting point PE fiber may be a polyethylene terephthalate (PET) fiber with a melting point of 255 to 260°C, preferably 256 to 259°C. If the melting point does not satisfy the above range, dust collection efficiency, antibacterial, There may be problems with deodorizing (deodorizing), anti-viral, and/or anti-mold requirements.

In addition, the first nonwoven fabric (support) 10 of the present invention may have a fluff count of 30 to 60 pieces/inch, preferably 40 to 50 pieces/inch, and if the fluff count is outside the range, the dust collection efficiency, There may be a problem of not satisfying the antibacterial and/or deodorizing properties.

In addition, the first non-woven fabric 10 is preferably used with a thickness of 0.2 to 0.6 mm, preferably 0.3 to 0.5 mm. In this case, if the thickness of the first non-woven fabric is less than 0.2 mm, the mechanical properties of the composite filter are low. There may be a problem where the overall thickness of the composite filter becomes unnecessarily thick if the thickness of the first nonwoven fabric exceeds 0.6mm.

Additionally, the antibacterial copper net 20 in the first step may be made by weaving antibacterial copper fibers into a square net shape. Specifically, the antibacterial copper network 20 of the present invention may have an average pore size of 30 to 70 ㎛, preferably 40 to 60 ㎛, and if the average pore size is less than 30 ㎛, there may be a problem of reduced tensile strength. If the average pore size exceeds 70㎛, not only does the dust collection efficiency decrease, but there may also be a problem of decreased antibacterial properties.

Additionally, the antibacterial copper fiber may be a polyester (PET) fiber, preferably a polyethylene terephthalate (PET) fiber, whose surface is coated with a metal such as nickel, copper, and/or copper alloy. And, the antibacterial copper fiber may have a diameter of 15 to 25 ㎛, preferably 18 to 22 ㎛. In addition, the antibacterial copper fiber may contain 75 to 85% by weight of the metal, preferably 78 to 82% by weight, based on the total weight%. If the metal is included in less than 75% by weight, the dust collection efficiency and antibacterial properties are reduced. There may be a problem of deterioration, and if it exceeds 85% by weight, there may be a problem of deterioration of tensile strength.

In addition, the antibacterial copper net is preferably 0.05 to 0.10 mm thick, preferably 0.06 to 0.10 mm. If the antibacterial copper net is less than 0.05 mm thick, there may be a problem of reduced antibacterial effect, and the antibacterial copper net has a thickness of 0.05 to 0.10 mm. If the thickness exceeds 0.10mm, there may be a problem of reduced flexibility of the composite filter.

Next, the first melt blown nonwoven fabric 30 is a three-dimensional fiber aggregate that has a spider web-like structure in which fine fibers are interconnected. The general definition is a process in which polymers capable of forming fibers from thermoplastic resins are spun through a spinneret formed with hundreds of orifices, and the polymer extruded through the spinning nozzle is sprayed at high speed from both sides of the spinneret in a molten state. This is a process in which ultrafine fibers that have been made ultrafine by hot air are laminated on a collector to form a self-bonding nonwoven fabric with high filter performance.

The first meltblown nonwoven fabric 30 of the present invention may be composed of polypropylene (PP) fibers. Specifically, polypropylene fibers may have an average diameter of 1 to 10 ㎛, preferably 3 to 7 ㎛.

The first meltblown nonwoven fabric is preferably 0.2 to 0.5mm thick, preferably 0.25 to 0.45mm thick. If the thickness of the first meltblown nonwoven fabric is less than 0.2mm, there may be a problem of low dust collection efficiency, If the thickness of the first meltblown nonwoven fabric exceeds 0.5 mm, the composite filter becomes unnecessarily thick and there may be a problem of poor breathability, so it is recommended to use a nonwoven fabric having the above thickness.

The HEPA filter 40 is a filter in which a second nonwoven fabric and a second meltblown nonwoven fabric are laminated and integrated, and the second nonwoven fabric has the same fibers and physical properties (fluff count, thickness, basis weight) as the first nonwoven fabric described above. You can use it. In addition, the second meltblown nonwoven fabric may also be used having the same fibers and physical properties (fluff count, thickness, basis weight) as the first meltblown nonwoven fabric described above.

Meanwhile, the first nonwoven fabric and/or the second nonwoven fabric of the manufactured antibacterial copper double composite filter may have a basis weight of 60 to 90 g/m2, preferably 65 to 75 g/m2.

In addition, the antibacterial copper mesh 20 of the manufactured antibacterial copper mesh filter may have a basis weight of 5 to 25 g/m2, preferably a basis weight of 10 to 20 g/m2.

Additionally, the first meltblown nonwoven fabric and/or the second meltblown nonwoven fabric may have a basis weight of 20 to 60 g/m2, preferably 20 to 40g/m2.

In addition, the antibacterial copper mesh and the first nonwoven fabric of the manufactured antibacterial copper mesh filter preferably have a basis weight ratio of 1:1.20 to 1.80, preferably 1:1.30 to 1.50. If the basis weight ratio is outside this range, dust There may be problems with not satisfying all of the collection efficiency, antibacterial, deodorizing, antiviral, and antifungal properties.

In addition, the antibacterial copper net and 1MB nonwoven fabric of the manufactured antibacterial copper net filter may have a basis weight ratio of 1:0.50 to 1.0, preferably 1:0.55 to 0.80, and if it is outside this range, the excellent There may be problems where tensile strength, dust collection efficiency, and antibacterial, deodorizing (deodorizing), antiviral, and antifungal properties are not all satisfied.

Next, the first nonwoven fabric (support) 10, the antibacterial copper net 20, the meltblown nonwoven fabric 30, and the HEPA filter prepared in the first step of the manufacturing method of the antibacterial copper double composite filter of the present invention are combined at the same time. By combining (combination), a composite filter in which the first nonwoven fabric, antibacterial copper net, meltblown nonwoven fabric, and HEPA filter are sequentially laminated can be manufactured.

At this time, lamination can be performed at a temperature of 40 to 60℃, preferably 40 to 50℃, and a pressure of 2 to 6kgf, preferably 2 to 4kgf. If the lamination temperature is outside the range described above, There may be a problem where the dust collection efficiency is not fully satisfied. Additionally, lamination can be performed by passing it through a heat fusion roller.

Meanwhile, the antibacterial copper double composite filter of the present invention is manufactured through the manufacturing method of the antibacterial copper mesh filter mentioned above, and has mechanical properties such as excellent tensile strength.

In addition, the antibacterial copper double composite filter of the present invention is 99.0% or more, preferably 99.5% or more, and more preferably 99.9% for each of Staphylococcus aureus, pneumoniae, Escherichia coli and Pseudomonas when measured in accordance with KS K 0693. It may have an antibacterial activity value of more than %.

In addition, the antibacterial copper double composite filter of the present invention has excellent antiviral properties, and when measured according to ISO 18184, it has an antibacterial effect of 90.0% or more (Log reduction 1 or more), preferably 99.0% or more (Log reduction 2 or more). It was confirmed to have excellent antiviral properties.

In addition, the antibacterial copper double composite filter of the present invention has excellent deodorizing properties, and when measured in accordance with KS I 2218, the ammonia reduction rate may be 13% or more, preferably 13.2 to 20.0%. Additionally, when measured according to KS I 2218, the acetic acid reduction rate may be 80% or more, preferably 85.0 to 90.0%. Additionally, when measured according to KS I 2218, the toluene reduction rate may be 20% or more, preferably 22.0 to 30.0%, and the benzene reduction rate may be 18% or more, 19.5 to 25.0%. Additionally, when measured according to KS I 2218, the methyl mercaptan reduction rate may be 95% or more, preferably 99.0% or more.

In addition, the antibacterial copper double composite filter of the present invention has ATCC 6205 (Chaetomium globosum), ATCC 9642 (Aspergillus brasiliensis), ATCC 11797 (Penicillium funiculosum), ATCC 15233 (Aureobasidium pullulans) and ATCC when measured according to ASEM G 21. 9645 (Trichoderma virens) has excellent anti-fungal properties.

In addition, the antibacterial copper double composite filter of the present invention has an initial pressure loss when measured in accordance with DIN 71460-1:2006, when the air flow rate is 300 m ³ /h and the dust concentration is 70 mg/m ³ 265 to 285 Pa, final pressure loss is 660 to 700 Pa, dust collection amount may be 26.0 to 30.0 g, preferably initial pressure loss is 270 to 280 Pa, final pressure loss is 680 to 695 Pa, The dust collection amount can be 27.5 to 29.0 g.

Although the present invention has been described above with a focus on embodiments, this is only an example and does not limit the embodiments of the present invention, and those skilled in the art will be able to understand the essential characteristics of the present invention. It can be seen that various modifications and applications not exemplified above are possible without departing from the scope. For example, each component specifically shown in the embodiments of the present invention can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

[Example]

Example 1: Preparation of antibacterial copper double composite filter

(1) Preparation of material for each layer of antibacterial copper filter

The first nonwoven fabric (support), antibacterial copper net, and meltblown nonwoven fabric were prepared as follows.

As a first nonwoven fabric (support), a first nonwoven fabric composed of polyethylene terephthalate (PET) fibers with a melting point of 255 to 260°C and a fluff count of 45 pieces/inch was prepared (basis weight: 70 g/m2).

Antibacterial copper net is a net manufactured by weaving into a square net using polyethylene terephthalate (PET) composite fibers (diameter 20㎛) coated with copper on the surface at 80% by weight based on the total weight of the composite fibers. As an antibacterial copper network, an average pore size of 50㎛ and a thickness of 0.08mm were prepared (basis weight: 15g/㎡).

As the first meltblown (MB) nonwoven fabric, a 1MB nonwoven fabric made of polypropylene fibers with an average diameter of 5㎛ was prepared (basis weight: 30g/㎡).

(2) Manufacturing of HEPA filter

As a second nonwoven fabric (support), a second nonwoven fabric composed of polyethylene terephthalate (PET) fibers with a melting point of 255 to 260°C and a fluff count of 45 pieces/inch was prepared (basis weight: 70g/m2).

As a second meltblown (MB) nonwoven fabric, a second MB nonwoven fabric made of polypropylene fibers with an average diameter of 5㎛ was prepared (basis weight: 30g/㎡).

The second nonwoven fabric and the second MB nonwoven fabric are laminated by passing them through a heat sealing roller having a temperature of 52 to 53° C. and a pressure of 2.9 to 3.1 kgf to form a HEPA filter ( thickness of approximately 0.5 mm) was manufactured.

(3) Manufacturing of antibacterial copper double composite filter

As shown schematically in Figure 1, heat fusion is performed at a temperature of 52 to 53°C and a pressure of 2.9 to 3.1 kgf while supplying the first nonwoven fabric (support), antibacterial copper net, first MB nonwoven fabric, and the previously manufactured HEPA filter. An anti-bacterial copper filter is laminated by passing it through a roller, and the first non-woven fabric (support) layer, an anti-bacterial copper mesh layer (about 0.08 mm thick), and a MB non-woven fabric layer are laminated in that order, and an anti-bacterial copper filter is laminated on top of the MB non-woven fabric layer of the anti-bacterial copper filter. An antibacterial copper double composite filter consisting of a HEPA filter was manufactured. At this time, the configuration of the HEPA filter coupled to the MB non-woven fabric layer of the antibacterial copper filter is the second non-woven fabric.

The total thickness of the manufactured antibacterial copper double composite filter was about 0.68 mm.

Next, the manufactured antibacterial copper double composite filter was subjected to a bending and mini (hot melt) process to produce an antibacterial copper filter (first nonwoven fabric, antibacterial copper net, first meltblown nonwoven fabric) and a HEPA filter as shown in Figure 2. An integrated composite filter was manufactured.

And, a photograph of the manufactured antibacterial copper double composite filter is shown in Figure 3.

Example 2: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, but an antibacterial copper net was manufactured using PET fibers coated so that the copper coating content on the surface of the PET fibers was 75% by weight of the total weight% of the composite fibers. An antibacterial copper filter and an antibacterial copper double composite filter were manufactured using the same method and conditions.

Example 3: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, but an antibacterial copper net was manufactured using PET fibers coated so that the copper coating content on the surface of the PET fibers was 85% by weight of the total weight% of the composite fibers. An antibacterial copper filter and an antibacterial copper double composite filter were manufactured using the same method and conditions.

Examples 4-5: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the antibacterial copper net was woven so that the average pore size of the antibacterial copper net was 35㎛, and was used to produce an antibacterial copper filter and antibacterial filter using the same method and conditions. Example 4 was performed by manufacturing the same double composite filter.

In addition, Example 5 was performed by manufacturing an antibacterial copper double composite filter using an antibacterial copper net that was woven so that the average pore size of the antibacterial copper net was 65㎛.

Examples 6 to 7: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the first nonwoven fabric with a basis weight of 65 g/m2 was used to manufacture an antibacterial copper filter, and then an antibacterial copper double composite filter was manufactured using the same method and conditions. Thus, Example 6 was carried out.

also, An antibacterial copper filter was manufactured using the first nonwoven fabric with a basis weight of 75 g/m2, and then an antibacterial copper double composite filter was manufactured using the same method and conditions using the same, and Example 7 was performed.

Examples 8 to 9: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the first MB nonwoven fabric with a basis weight of 20 g/m2 was used to manufacture an antibacterial copper filter, and then an antibacterial copper double composite filter was manufactured using the same method and conditions. Example 8 was prepared and carried out.

In addition, an antibacterial copper filter was manufactured using the first MB nonwoven fabric with a basis weight of 40 g/m2, and then an antibacterial copper double composite filter was manufactured using the same method and conditions using the same, and Example 9 was performed.

Comparative Examples 1 to 2: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the first nonwoven fabric was manufactured using 20 pieces/inch of fluff, and then an antibacterial copper double composite filter was manufactured using the same method and conditions. It was prepared and carried out in Comparative Example 1.

In addition, Comparative Example 2 was performed by manufacturing an antibacterial copper double composite filter using the first nonwoven fabric with a fluff count of 70 pieces/inch.

Comparative Examples 3 to 4: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the antibacterial copper net was woven so that the average pore size of the antibacterial copper net was 20㎛. Using this, an antibacterial copper filter and an antibacterial filter were manufactured using the same method and conditions. Comparative Example 3 was performed by manufacturing the same double composite filter.

In addition, Comparative Example 4 was performed by manufacturing an antibacterial copper double composite filter using an antibacterial copper net woven so that the average pore size of the antibacterial copper net was 80㎛.

Comparative Examples 5 to 6: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the antibacterial copper net was woven so that the average pore size of the antibacterial copper net was 20㎛. Using this, an antibacterial copper filter and an antibacterial filter were manufactured using the same method and conditions. Comparative Example 5 was performed by manufacturing the same double composite filter.

In addition, Comparative Example 6 was performed by manufacturing an antibacterial copper double composite filter using an antibacterial copper net that was woven so that the average pore size of the antibacterial copper net was 85㎛.

Comparative Examples 7 to 8: Preparation of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the first nonwoven fabric with a basis weight of 55 g/m2 was used to manufacture an antibacterial copper filter, and then an antibacterial copper double composite filter was manufactured using the same method and conditions. Comparative Example 7 was then performed.

In addition, an antibacterial copper filter was manufactured using the first nonwoven fabric with a basis weight of 95 g/m2, and then an antibacterial copper double composite filter was manufactured using the same method and conditions using the first nonwoven fabric, and Comparative Example 8 was performed.

Comparative Examples 9 to 10: Manufacturing of antibacterial copper double composite filter

An antibacterial copper filter was manufactured in the same manner as in Example 1, except that the first MB nonwoven fabric with a basis weight of 15 g/m2 was used to manufacture an antibacterial copper filter, and then an antibacterial copper double composite filter was manufactured using the same method and conditions. It was prepared and carried out in Comparative Example 9.

In addition, an antibacterial copper filter was manufactured using the first MB nonwoven fabric with a basis weight of 60 g/m2, and then an antibacterial copper double composite filter was manufactured using the same method and conditions, and Comparative Example 10 was performed.

division antibacterial copper filter HEPA filter combination conditions 1st
Non-woven antibacterial copper net 1st MB
Non-woven 2nd
Non-woven 2nd MB
Non-woven temperature
(℃) enter
(kgf) Example 1 PET fiber,
Number of fluffs: 45/inch;
Basis weight 70g/㎡ Cu-coated PET composite fiber diameter 20㎛,
Cu content 80% by weight,
Average opening size of the network: 50㎛
Antibacterial copper net basis weight 15g/㎡ PP fiber diameter: 5㎛,
Basis weight 30g/㎡ PET fiber,
Number of fluffs: 45/inch;
Basis weight 70g/㎡ PP fiber diameter: 5㎛,
Basis weight 30g/㎡ 52
~
53 2.9
~
3.1

division antibacterial copper filter 1st nonwoven fabric antibacterial copper net 1st MB
Non-woven basis weight ratio
(No. 1 non-woven fabric: Antibacterial copper net: No. 1 MB non-woven fabric) Example 1 PET fiber,
Number of fluffs: 45/inch;
Basis weight 70g/㎡ Cu-coated PE composite fiber diameter 20㎛,
Cu content in composite fiber 80% by weight,
Average opening size of the network: 50㎛
Antibacterial copper net basis weight 15g/㎡ PP fiber diameter: 5㎛,
Basis weight 30g/㎡ 1.4:1:0.6 Example 2 - Cu content in composite fiber 75% by weight - 1.4:1:0.6 Example 3 - Cu content in composite fiber: 85% by weight - 1.4:1:0.6 Example 4 - Average pore size of the network is 35㎛ - 1.4:1:0.6 Example 5 - Average pore size of the network is 65㎛ - 1.4:1:0.6 Example 6 Basis weight 65g/㎡ - - 1.3:1:0.6 Example 7 Basis weight 75g/㎡ - - 1.5:1:0.6 Example 8 - - Basis weight 20g/㎡ 1.4:1:0.4 Example 9 - - Basis weight 40g/㎡ 1.4:1:0.8 Comparative Example 1 Number of fluff: 20/inch - - 1.4:1:0.6 Comparative Example 2 Number of fluff: 70/inch - - 1.4:1:0.6 Comparative Example 3 - Cu content in composite fiber: 65% by weight - 1.4:1:0.6 Comparative Example 4 - Cu content in composite fiber: 90% by weight - 1.4:1:0.6 Comparative Example 5 - The average pore size of the network is 20㎛ - 1.4:1:0.6 Comparative Example 6 - The average pore size of the network is 80㎛ - 1.4:1:0.6 Comparative Example 7 Basis weight 55g/㎡ - - 1.1:1:0.6 Comparative Example 8 Basis weight 95g/㎡ - - 1.9:1:0.6 Comparative Example 9 - - Basis weight 15g/㎡ 1.4:1:0.3 Comparative Example 10 - - Basis weight 60g/㎡ 1.4:1:1.2

Experimental Example 1

The following physical properties were measured for each of the antibacterial copper double composite filters prepared in Examples 1 to 9 and Comparative Examples 1 to 10, and the results are shown in Tables 3 and 4 below.

(1) Dust collection efficiency

Based on ASHRAE STANDARD 52.1, gravimetric method (test wind speed: 1.0 m/s, terminal pressure loss: 76 mmAq), the dust collection efficiency of each of the antibacterial copper double composite filters manufactured in Examples 1 to 9 and Comparative Examples 1 to 10 was determined. Measured.

(2) Measurement of antibacterial activity

The antibacterial properties of each of the antibacterial copper double composite filters manufactured in Examples 1 to 9 and Comparative Examples 1 to 10 were measured in accordance with the KS K 0693 test standard.

(2-1) Test bacteria species:

Test bacteria ①: Staphylococcus aureus ATCC 6538 (Staphylococcus aureus)

Test bacteria ②: Escherichia coli ATCC 8739 (E. coli)

(2-2) Concentration of inoculant solution:

Test bacteria ①: 2.5 × 10 ⁵ CFU/mL

Test bacteria ②: 2.5 × 10 ⁵ CFU/mL

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Tensile strength (N) 680 675 685 550 710 655 Dust collection efficiency (%) 99.5 99.9 99.9 99.5 99.9 99.9 Antibacterial degree
(%) Test bacteria ① 99.9 99.9 99.9 99.9 99.9 99.9 Test bacteria ② 99.9 99.9 99.9 99.9 99.9 99.9 division Example 7 Example 8 Example 9 Comparative Example 1 Comparative Example 2 Comparative Example 3 Tensile strength (N) 708 630 710 380 420 460 Dust collection efficiency (%) 99.9 99.9 99.9 99.9 99.9 99.9 Antibacterial degree
(%) Test bacteria ① 99.9 99.9 99.9 99.9 99.9 99.9 Test bacteria ② 99.9 99.9 99.9 99.9 99.9 99.9

division Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Tensile strength (N) 480 495 510 520 540 550 580 Dust collection efficiency (%) 99.9 99.9 99.9 99.9 99.9 99.9 99.9 Antibacterial degree
(%) Test bacteria ① 99.9 99.9 99.9 99.9 99.9 99.9 99.9 Test bacteria ② 99.9 99.9 99.9 99.9 99.9 99.9 99.9

As can be seen in Table 1, it was confirmed that the antibacterial copper double composite filter prepared in Example 1 had excellent tensile strength, dust collection efficiency, and antibacterial properties.

Experimental Example 2: Antibacterial, antiviral, deodorizing, antifungal test

(1) Antibacterial test

Separately from Experimental Example 1, the antibacterial copper double composite filter manufactured in Example 1 was commissioned by the Korea Standards and Research Institute, and its antibacterial properties against Staphylococcus aureus, pneumoniae, Escherichia coli, and Pseudomonas fungi were measured in accordance with the KS K 0693 test standard. , the results are shown in Figure 4.

As can be confirmed through the test report in Figure 4, it was confirmed that the antibacterial copper double composite filter of the present invention has excellent antibacterial properties not only against Staphylococcus aureus and Escherichia coli, but also against pneumonia and Pseudomonas bacteria.

(2) Antiviral test

The antibacterial copper double composite filter manufactured in Example 1 was commissioned to the Korea Testing and Research Institute, and an antiviral test was performed on MRC-5 Cell (cell line) according to the ISO 18184 test method, and the results are shown in Figure 5a ( test report) and Figure 5b (test measurement photo).

As a result of the test, it was confirmed that it had excellent antiviral properties with a virus reduction rate of 99.4%.

(3) Deodorizing test

The antibacterial copper double composite filter manufactured in Example 1 was commissioned by the Korea Standards and Research Institute and measured according to the KS I 2218 test standard, and the results are shown in Figures 6a to 6c.

As can be confirmed through the test reports of FIGS. 6A to 6C, the antibacterial copper double composite filter of Example 1 achieved a reduction rate of more than 13% for ammonia, a reduction rate of more than 80% for acetic acid, and toluene. ) showed a reduction rate of more than 20%, benzene showed a reduction rate of more than 18%, and methyl mercaptan showed a reduction rate of more than 95%.

(4) Anti-fungal test

The antibacterial copper double composite filter manufactured in Example 1 was requested from the Korea Standards and Research Institute, and according to ASTM G 21, ATCC 6205 (Chaetomium globosum), ATCC 9642 (Aspergillus brasiliensis), ATCC 11797 (Penicillium funiculosum), ATCC 15233 An anti-fungal test was performed using (Aureobasidium pullulans) and ATCC 9645 (Trichoderma virens), and it was evaluated to have excellent anti-fungal properties (see Figures 7a and 7b).

Experimental Example 3: Measurement of breathability and dust collection amount

The antibacterial copper double composite filter manufactured in Example 1 was requested from the Korea Institute of Industrial Technology, and its breathability was measured in accordance with DIN 71460:2006, and the results are shown in Figures 8A to 8C.

When the air flow rate was 300 m ³ /h and the dust concentration was 70 mg/m ³ , the initial pressure loss was 276.4 Pa, the final pressure loss was 690.9 Pa, and the dust collection amount was 28.1 g, showing excellent ventilation and dust collection amount. It was confirmed that it had.

Simple modifications or changes to the present invention can be easily implemented by those skilled in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

10: First spunbond nonwoven layer (support layer)
20: Antibacterial copper network layer
30: Meltblown nonwoven layer
40: HEPA filter

Claims (11)

Step 1 of preparing a first nonwoven fabric with a basis weight of 60 to 90 g/m2, an antibacterial copper net with a basis weight of 5 to 25 g/m2, a first meltblown nonwoven fabric and a HEPA filter with a basis weight of 20 to 60 g/m2, respectively;
A second step of combining the first non-woven fabric, the anti-bacterial copper net, the melt-blown non-woven fabric, and the HEPA filter at the same time to produce an integrated laminate in which the first non-woven fabric, the anti-bacterial copper net, the melt-blown non-woven fabric, and the HEPA filter are sequentially laminated; and
Performing a process including a third step of bending and hot melting the two-step lamination,
The antibacterial copper network is made by weaving antibacterial copper fibers with a diameter of 15 to 25 ㎛ in the form of a square net. The antibacterial copper network has an average pore size of 30 to 70 ㎛ and a thickness of 0.05 to 0.10 mm,
The antibacterial copper fiber is a polyethylene terephthalate (PET) fiber coated on the surface with a metal containing copper or copper alloy,
The antibacterial copper fiber contains 75 to 85% by weight of the metal based on the total weight%,
The HEPA filter is a filter in which a second nonwoven fabric with a basis weight of 60 to 90 g/m2 and a second meltblown nonwoven fabric with a basis weight of 20 to 60 g/m2 are laminated and integrated.
The antibacterial copper network and the first nonwoven fabric have a basis weight ratio of 1:1.20 to 1.80,
A method of manufacturing an antibacterial copper double composite filter, wherein the antibacterial copper net and the first melt blown nonwoven fabric have a basis weight ratio of 1:0.50 to 1.0. The method of claim 1, wherein each of the first nonwoven fabric and the second nonwoven fabric includes a nonwoven fabric containing polyester fibers having a melting point of 255 to 260°C. The method of claim 2, wherein the first nonwoven fabric has a fluff count of 30 to 60 pieces/inch and a thickness of 0.2 to 0.6 mm,
A method of manufacturing an antibacterial copper double composite filter, characterized in that the second nonwoven fabric has a fluff count of 30 to 60 pieces/inch and a thickness of 0.2 to 0.6 mm. delete delete delete The method of claim 1, wherein each of the first meltblown nonwoven fabric and the second meltblown nonwoven fabric includes polyester (PET) fibers with an average diameter of 1 to 10㎛,
A method of manufacturing an antibacterial copper double composite filter, characterized in that the first meltblown nonwoven fabric has a thickness of 0.2 to 0.5mm, and the second meltblown nonwoven fabric has a thickness of 0.2 to 0.5mm. delete The method of claim 1, wherein the fusion is performed using a heat fusion roller,
A method of manufacturing an antibacterial copper double composite filter, characterized in that it is performed at a heat fusion roller temperature of 40 ~ 60 ℃ and a pressure of 2 ~ 4 kgf. delete A pleated filter manufactured by the manufacturing method of any one of claims 1 to 3, 7, and 9,
It is a composite filter in which a first nonwoven fabric with a basis weight of 60 to 90 g/m2, an antibacterial copper net with a basis weight of 5 to 25 g/m2, a first meltblown nonwoven fabric with a basis weight of 20 to 60 g/m2, and a HEPA filter are sequentially laminated and integrated.
The HEPA filter is laminated with a second nonwoven fabric having a basis weight of 60 to 90 g/m2 and a second meltblown nonwoven fabric having a basis weight of 20 to 60g/m2,
The antibacterial copper network is made by weaving antibacterial copper fibers with a diameter of 15 to 25 ㎛ in the form of a square net. The antibacterial copper network has an average pore size of 30 to 70 ㎛ and a thickness of 0.05 to 0.10 mm,
The antibacterial copper fiber is a polyethylene terephthalate (PET) fiber coated on the surface with a metal containing copper or copper alloy,
The antibacterial copper fiber contains 75 to 85% by weight of the metal based on the total weight%,
The antibacterial copper network and the first nonwoven fabric have a basis weight ratio of 1:1.20 to 1.80,
An antibacterial copper double composite filter, wherein the antibacterial copper net and the first meltblown nonwoven fabric have a basis weight ratio of 1:0.50 to 1.0.