KR102530432B1 - Fine dust removal Composite Film having Antimicrobial activity and method for producing of the same - Google Patents

Abstract

The present invention prints conductive wires and electrodes diverging from the conductive wires at pitch intervals with carbon ink on one side of a PET film, and provides antibacterial activity to a dust collecting plate for an electrostatic precipitator bonded by covering the electrodes with a protective film, thereby preventing the growth of bacteria and viruses. To provide a composite film for collecting fine dust having antibacterial activity that can actively prevent the growth of, a PET base film; a Cu layer for exhibiting antibacterial activity coated on the lower surface of the base film; a carbon electrode printed on the upper surface of the base film; a PET protective film that is laminated to cover the surface of the electrode to protect the electrode; It is characterized by a composite film for collecting fine dust consisting of a Cu layer for exhibiting antibacterial activity coated on the surface of the protective film.
National R&D project that supported this invention
Assignment identification number: S2715871
Name of support department: Ministry of Small and Medium Business
Research project name: New product development project with purchase conditions (domestic demand department)
Title of research project: Development of conductive micro-pattern film filter for fine dust collection
Contribution rate: 1/1
Total research period: 2019.06.01.∼ 2021.05.31.
Organized by: Kukbo Chemical Co., Ltd.

Description

Fine dust removal Composite Film having Antimicrobial activity and method for producing of the same}

The present invention collects fine dust by using the dielectrophoresis of electrodes printed on the surface of a PET film, and prevents the proliferation and growth of bacteria and viruses that would have been included in the collected fine dust with the antimicrobial activity of Cu. It relates to a composite film for collecting fine dust and a manufacturing method thereof.

Fine dust in the air has a great adverse effect on human life and quality as well as livestock. In particular, in recent years, due to rapid urbanization and innovation city development in areas adjacent to barns, complaints are frequent because odors harm the residential environment and cause pain.

Unlike barns where manure is buried on the floor and collected periodically, pigs do not lay hay on the floor and leave manure unattended, resulting in a very bad smell. The causes of odor are ammonia, volatile amines, volatile sulfur compounds, indoles, volatile fatty acids, and microorganisms.

The causative agent of these odors floats around as airborne fine dust in the air inside the pig house, and sticks to the mucous membrane of the nose of the manager of the barn when they breathe, causing pain.

Fine dust in the barn is mainly generated from feed and manure, and when fine dust accumulates in electrical equipment in the barn, the possibility of fire due to tracking increases.

Fine dust with a diameter of 5㎛ or less sticks to the alveoli of livestock managers and livestock, causing occupational health disorders such as asthma, hypersensitivity pneumonitis, chronic obstructive pulmonary disease, and rhinitis. may also cause

Research data have been reported that collecting fine dust of PM ₁₀ or less and ultrafine dust of PM _2.5 or less can significantly reduce fine dust that causes respiratory diseases and unpleasant odors.

As a means of collecting fine dust for an electrostatic precipitator, a HEPA filter mainly composed of filter cloth is common. However, when applied to a barn where a large amount of fine dust is generated, such as a pig house, the replacement cycle of the HEPA filter is short, which is uneconomical and the replacement work is cumbersome. it's bad

In the case of pig houses, humidity is controlled by mist spraying to prevent drying. If the humidity in the pig house is too high, bacteria and mold can proliferate and produce a large amount of endotoxin substances.

Regarding this problem, it is proposed in Korean Patent Registration No. 10-1761908. On one side of this prior art, an electric filter is required so that the dust collection efficiency is not lowered and maintained constant by applying a voltage different from the preset voltage to the electric precipitator or by fine dust stacked on the dust collecting plate.

The electric filter includes a discharge electrode positioned on a flow path inside a housing in which an internal flow path is formed for the inflow of external air to which voltage is applied, and a discharge electrode positioned on the inner flow path in a direction facing the discharge electrode to induce discharge of the discharge electrode and the discharge electrode. and a collection electrode for collecting particulate pollutants contained in the outside air, which is unipolarly charged by

Although the amount of discharge is controlled by the interval controller to collect dust, since the discharge electrode and the dust collection electrode are each a single electrode plate, dust collection is limited as it passes through the internal flow path in a short time. There is a disadvantage that a filter is required.

On the other hand, Japanese Patent Laid-Open No. 2002-159881 discloses that a first PET film having an electrode formed on one side and a second PET film having a second discharge electrode are overlapped so that the electrodes face each other and adhered with double-sided tape to electrically separate the PET film on both sides. As an electrode for electric dust collection in which a through hole is made on the surface to conduct mutual conduction, when the volatile matter among the adhesive components of the double-sided tape volatilizes over time, the first and second PET films are peeled off and the function is deteriorated, and the first and second PET films Low yield due to poor bonding is also a problem, and antibacterial activity, which cannot be expected, is a big challenge.

In addition, Patent Publication No. 10-2021-0048758 is a prior application invention of the present applicant, and silk-screen printing of a lead wire connected to a terminal with a printing ink containing carbon powder on one side of a PET film and an electrode branched at pitch intervals from the lead wire. It is a dust collecting plate for an electrostatic precipitator in which a PET protective film is laminated by applying a cured resin to the electrode printed layer on which the wires and electrodes are printed except for the terminal, and the cured resin is cured and laminated with ultraviolet rays. However, the problem is that there is no antibacterial function. .

(Document 1) Registered Patent No. 10-1761908 (Document 2) Japanese Patent Laid-Open No. 2002-159881 (Document 3) Patent Publication No. 10-2021-0048758

The present invention prints conductive wires and electrodes diverging from the conductive wires at pitch intervals with carbon ink on one side of a PET film, and provides antibacterial activity to a dust collecting plate for an electric precipitator bonded by covering the electrodes with a protective film, thereby preventing bacterial growth and viruses. It is to provide a composite film for collecting fine dust having antibacterial activity capable of actively preventing the growth of

Another object of the present invention is to provide a method for efficiently and efficiently manufacturing the composite film for collecting fine dust having the antibacterial activity.

Provided herein is a general summary of the invention, which summary is not to be construed as limiting the scope of the invention.

As a means for realizing the above-mentioned first task, a composite film for collecting fine dust including antibacterial activity corresponding to a key aspect includes a base film; a Cu layer for exhibiting antibacterial activity coated on the lower surface of the base film; a carbon electrode printed on the upper surface of the base film; a protective film covering the surface of the electrode to protect the electrode; It provides a composite film for collecting fine dust consisting of a Cu layer for exhibiting antibacterial activity coated on the surface of the protective film.

Electrodes are printed with carbon ink at a predetermined pitch on the surface of a multi-layer composite film obtained by laminating and bonding two or more layers of the composite film or a base film on a roll, and the electrode is coated with a protective film to protect it, and the back side of the base film and It includes a multi-layer composite film for collecting fine dust in which the surface of the protective film is coated with Cu, and the composite film is cut at pitch intervals or joined by bending in a zigzag pattern.

Base film and protective film are preferable to be made of PET, which has excellent heat resistance and electrical properties compared to PE and PP films, and has only a slight decrease in ultimate strength even when exposed to high temperatures for a long time, but a slight temperature deviation. The thickness is 0.05 to 1 mm. advantageous in terms of

The second task is to coat the Cu layer on the back side while unwinding the PET base film on the roll; printing wires and electrodes with carbon ink on the surface of the base film; Coating a Cu layer on the surface of a protective film on a roll having the same width as the base film: coating a cured resin on the surface of the base film on which wires and electrodes are printed; By bonding the back side of the protective film to the cured resin coating layer of the base film so that the Cu layer is exposed to the outside laminating; It can be implemented as a method of manufacturing a composite film for collecting fine dust that exhibits antibacterial activity by proceeding to: curing and bonding the cured resin with ultraviolet rays immediately after the lamination step.

The composite film may be cut at a predetermined pitch and subdivided into sheets required by standards for air purifiers and electrostatic precipitators.

When the composite film of the present invention is applied to air purifiers and electrostatic precipitators, the antibacterial activity of the Cu layer thoroughly prevents the proliferation of bacteria and the growth of viruses that are captured by being mixed with fine dust.

In addition, since the electrode of the base film is protected by a protective film, every effort can be made to protect the electrode from contact with water when washing the collected fine dust.

1 is a single layer diagram of a composite film for collecting fine dust having antibacterial activity according to the present invention
2 is an exemplary view of an electrode printed on a base film
3 is a process diagram of laminating a protective film having a Cu layer to a base film having a Cu layer and an electrode

In FIG. 1, the composite film (1) exhibiting antibacterial activity of the present invention is composed of a base film (2), a protective film (3), a Cu layer (4) (4a), an electrode (5), and a cured resin (6). It consists of

The base film (2) and the protective film (3) have excellent heat resistance, stiffness, and electrical properties compared to PE and PP films, and have a slight temperature deviation so that their ultimate strength is slightly reduced even when exposed to high temperatures for a long time. Jay.

The thickness of the base film 2 and the protective film 3 is preferably 0.1 to 0.3 mm. Even with this thickness, sufficient strength and smoothness can be obtained, and even if the thickness after lamination is thin, it is the same as the thickness of the non-woven fabric HEPA filter, the fine dust collection capacity can be dramatically increased by stacking a much larger number of composite film HEPA filters. there is.

In addition, the Cu layer (4) (4a) is for imparting antibacterial activity, and the back surface of the base film (2) and the protective film (3) are coated with an adhesive containing copper powder, specifically nano copper powder, using a printing roll. Apply over the entire surface and heat dry.

2 illustrates an example of a printed pattern of the electrodes 5 and 5a. In this figure, the first conducting wire 7 and the second conducting wire 7a are printed side by side along the longitudinal direction on both sides in the width direction of the back side of the base film 2 released from the roll film, and the base film 2 Branch leads 8 are printed in the first pitch region in the direction perpendicular to the first conductor line 7, and a plurality of electrodes 5 are printed on the branch conductors 8 at predetermined intervals toward the second pitch region. .

In addition, the second conducting wire 7a of the base film 2 has a branch conducting wire 8a in a right angle direction, and a plurality of electrodes ( 5a) are printed side by side. The branch leads 7a of the second pitch region are symmetrical to the branch leads 7 of the first pitch region.

Thereafter, the printing area including the branch lead wire 8 and the electrode 5 and the branch lead wire 8a and the electrode 5a is continuously printed at one pitch. In this way, it is possible to efficiently and efficiently print the conductive wire, the branch wire, and the electrode with the carbon ink.

Next, a method for manufacturing a composite film for collecting fine dust having antibacterial activity will be described.

Coating a Cu layer on the back side while unwinding the PET base film on the roll; printing wires and electrodes with carbon ink on the surface of the base film; Coating a Cu layer on the surface of a protective film on a roll having the same width as the base film: coating a cured resin on the surface of the base film on which wires and electrodes are printed; suitably laminating the back surface of the protective film to the cured resin coating layer of the base film so that the Cu layer is exposed; Bonding by curing the curable resin with ultraviolet light immediately after the lamination step; to prepare a composite film for collecting fine dust that exhibits antibacterial activity.

The composite film sheet, which is a precedent condition for standardization, is completed by cutting the length including two sets of electrodes adjacent to each other in the longitudinal direction of the base film as one pitch or cutting into a plurality of pitches suitable for the purpose.

Carbon ink for terminals and electrodes preferably has a viscosity of 100 to 200 cps and a printing thickness of 10 μm or less in terms of print quality and discharge amount. A preferred coating thickness of each Cu layer is 3 to 10 μm. Considering that homogeneous coating is difficult for less than 3 μm, economic feasibility and ease of bending of the base film and protective film when forming a multi-layer composite film by folding multiple films of 2 pitches or more in a zigzag shape are considered for less than 10 μm.

The electrode is roll-printed with carbon ink on the surface of the base film and dried. Electrodes having a thickness of 10 μm or less do not show marks even when a PET protective film having a thickness equal to that of the base film is coated and bonded to the base film, thereby enhancing the quality of the composite film.

It was confirmed that the electrode had a line width of 0.5 to 1 mm, a distance between electrodes of 4 to 5 mm, and a coating thickness of 2 to 10 μm of the Cu layer. An electrode line width of less than 0.5 mm is an obstacle to deterioration in printing quality, and an electrode line width of more than 1 mm prevents dielectric phenomena between adjacent electrodes.

The PET base film and protective film, on which a plurality of electrodes directly connected to the terminals are printed, can be cured by UV curing resin in a very short time of 1 or 2 seconds to bond the base film and protective film with high quality. can

The base material of the cured resin 6 is any kind of acrylic type or urethane type, and the coating thickness is 10 to 20 μm.

1: composite film 2: base film
3: protective film 4,4a: Cu layer
5,5a: electrode 6: cured resin
7,7a: Terminal

Claims (6)

base film 2;
Cu layer 4 for exhibiting antibacterial activity coated on the back surface of the base film 2;
Conductors 7 and 7a and electrodes 5 and 5a printed with carbon ink on the surface of the base film 2;
a protective film (3) for protecting the electrodes (5, 5a) by lamination bonding on the surface of the base film (2);
A Cu layer (4a) for exhibiting antibacterial activity coated on the surface of the protective film (3); and
It includes a cured resin 6 bonded by laminating the surface of the base film 2 and the back surface of the protective film 3,
The first conducting wire 7 and the second conducting wire 7a are printed side by side along the longitudinal direction on both edges of the back side of the base film 2 in the width direction, and in the first pitch region of the base film 2, the A branch lead 8 is formed in a direction perpendicular to the first lead wire 7, and a plurality of electrodes 5 are printed on the branch lead 8 at predetermined intervals toward the second pitch region,
A branch lead 8a is formed in a perpendicular direction to the second lead 7a of the base film 2, and a plurality of electrodes ( 5a) are printed side by side, and the branch leads 8a of the second pitch region are symmetrical with the branch leads 8 of the first pitch region,
The thickness of the base film 2 and the protective film 3 is 0.1 to 0.3 mm, the coating thickness of the Cu layer 4a for exhibiting antibacterial activity is 3 to 10 μm, and the electrodes 5 and 5a are The thickness is 10 μm or less, the line width is 0.5 to 1 mm, the distance between electrodes is 4 to 5 mm, the base material of the cured resin (6) is either acrylic or urethane, and the coating thickness is 10 to 20 μm. A composite film for collecting fine dust with antibacterial properties. The composite film for collecting fine dust having antibacterial activity according to claim 1, wherein the base film and the protective film are PET films. delete The composite film for collecting fine dust with antimicrobial activity according to claim 1, wherein the Cu layer on the protective film side of the lower composite film is laminated and bonded so that the Cu layer on the base film side of the upper composite film overlaps to increase antibacterial activity and fine dust collecting power. .
Coating the Cu layer 4 on the back side while unwinding the base film 2 made of PET on a roll;
continuously printing the conductive wires 7 and 7a, the branched wires 8 and 8a, and the electrodes 5 and 5a at pitch intervals on the surface of the base film 2 with carbon ink;
Coating a Cu layer on the surface of the protective film 3 on a roll having the same length and equal width as the base film 2:
applying a cured resin (6) to the surface of the base film (2) on which wires and electrodes are printed;
suitably laminating the back surface of the protective film to the cured resin coating layer of the base film so that the Cu layer is exposed;
Bonding by curing the curable resin with ultraviolet light immediately after the lamination step; and
Cutting the length including two sets of electrodes adjacent to each other in the longitudinal direction of the base film at one pitch, or cutting at a plurality of pitches suitable for the purpose,
The coating thickness of the Cu layer 4a is 3 to 10 μm, the thickness of the base film 2 and the protective film 3 is 0.1 to 0.3 mm, and the coating of the Cu layer 4a for exhibiting antibacterial activity. The thickness is 3 to 10 μm, the electrodes 5 and 5a have a thickness of 10 μm or less, a line width of 0.5 to 1 mm, and a distance between electrodes of 4 to 5 mm. The base material of the cured resin 6 is acrylic or urethane. Any one, further comprising a step in which the coating thickness is 10 to 20 μm,
The step of continuously printing the branch leads 8 and 8a and the electrodes 7 and 7a at pitch intervals,
The first conducting wire 7 and the second conducting wire 7a are printed side by side along the longitudinal direction on both edges of the back side of the base film 2 in the width direction, and in the first pitch region of the base film 2, the branching wires 8 are formed in a direction perpendicular to the first conducting wires 7, and a plurality of electrodes 5 are printed on the branching wires 8 at predetermined intervals toward a second pitch region; and
A branch lead 8a is formed in a perpendicular direction to the second lead 7a of the base film 2, and a plurality of electrodes ( 5a) are printed side by side, and the branch leads 8a of the second pitch region are symmetrical with the branch leads 8 of the first pitch region. The method of claim 5, wherein the carbon ink for terminals and electrodes has a viscosity of 100 to 200 cps, a printing thickness of 10 μm or less, and a Cu layer thickness of 3 to 10 μm.

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