KR102288357B1 - Antibacterial film manufacturing method - Google Patents

Abstract

The present invention relates to an antibacterial film manufacturing method and, more specifically, to an antibacterial film manufacturing method capable of manufacturing an antibacterial film with increased durability. The present invention comprises: a preparation step including a step of preparing a first film to which copper powder is added and a step of preparing an adhesive by mixing raw materials; a laminating step including a step of applying the adhesive to the first film and laminating a second film on the first film to prepare an antibacterial film; and an aging step of maintaining the antibacterial film at 30℃ to 60℃ for a predetermined time.

Description

Antibacterial film manufacturing method {ANTIBACTERIAL FILM MANUFACTURING METHOD}

The present invention relates to a method for manufacturing an antibacterial film, and more particularly, to a method for manufacturing an antibacterial film capable of manufacturing an antibacterial film with improved durability.

Recently, as the occurrence of new infectious diseases and infectious bacteria such as corona virus and super bacteria increases, research to minimize transmission is being actively conducted.

Viruses and germs with strong contagious power, such as the corona virus and super bacteria, are known to be easily spread by the hand. Attempts are underway.

The prior art, Laid-Open Patent Publication No. 10-2020-0061305 (hereinafter referred to as the prior art) relates to a method for manufacturing a natural antibacterial adhesive film, and in more detail, the manufacturing method includes (a) a base film and a base film formed on one surface of the base film providing an adhesive film comprising an adhesive layer; (b) coating an antimicrobial solution containing an antimicrobial substance and a solvent on the other surface of the base film of the adhesive film; (c) drying the adhesive film coated with the antibacterial solution (copper, etc.) in hot air to form a laminated film including an antibacterial layer/base film/adhesive layer; and (d) rolling the laminated film in a roll form so that the antibacterial layer and the adhesive layer are in contact with each other and transferring the antibacterial layer onto the adhesive layer. Including, the antibacterial adhesive film prepared according to the present invention is rolled in the form of a film and the antibacterial material is transferred to the adhesive layer, so that there is no reactivity between the adhesive and the antibacterial solution. There is no limitation, the process is easy, and by including a natural antibacterial material, food or hospital (medical) waste is completely sealed to block odor and has an excellent antibacterial effect.

However, the antibacterial film produced by the prior art has a problem in that durability is weak.

The present invention has been devised to solve the above problems, and it is an object of the present invention to provide an antibacterial film manufacturing method that has excellent durability, suppresses lifting, and maximizes the characteristics of an adhesive.

Another object of the present invention is to provide an antibacterial film manufacturing method capable of manufacturing an antibacterial film that is convenient to install.

Another object of the present invention is to provide an antibacterial film manufacturing method capable of manufacturing an antibacterial film having excellent rigidity.

The present invention for the purpose of solving the above problems has the following configuration and features.

A preparation step comprising preparing a first film to which copper powder is added and preparing a pressure-sensitive adhesive by mixing raw materials, applying the pressure-sensitive adhesive to the first film, and laminating the second film on the first film and a lamination step comprising the step of preparing an antibacterial film and an aging step of maintaining the antibacterial film at 30° C. to 60° C. for a predetermined time.

It may also include a printing step of displaying the identification information on the first film.

In addition, the first film may include a polyethylene film (PE film), and the second film may be a polyethylene terephthalate film (PET film), and the second film may be thicker than the first film.

By including the step of preparing the first film to which the copper powder of the present invention having the above configuration and characteristics is added, durability is improved and a service life is extended.

In addition, the present invention has the effect that by including the lamination step, it is possible to manufacture a thicker antibacterial film, and excellent durability and suppression of lifting.

In addition, the present invention has the effect of maximizing the adhesive force of the pressure-sensitive adhesive by including the aging step.

In addition, the present invention has the effect that, by including the printing step, the user can present the installation method so that the first film is exposed.

In addition, the present invention has the effect that the second film includes a PET film (Polyethylene Terephthalate film), and is thicker than the first film, so that rigidity and durability are improved and lifting is suppressed.

1 is a schematic flowchart for explaining an antibacterial film manufacturing method according to an embodiment of the present invention.
Figure 2 is a schematic view for explaining an antibacterial film manufacturing method according to an embodiment of the present invention.
3 is a view for explaining a compounding process.
Figure 4 is a view for explaining the antibacterial film manufactured by the antibacterial film manufacturing method according to an embodiment of the present invention.
5 is a view for explaining the aging step.
6 is a view for explaining a further embodiment of the present invention.
FIG. 7 is a cross-sectional view taken along line A of FIG. 6 .

The present invention is intended to be described in detail in the text of the embodiment (態樣, aspect) (or embodiments) can be applied to various changes and can have various forms. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification will be referred to only to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

Throughout this specification, when a part is "connected" with another part, this includes not only the case of being "directly connected", but also the case of being "indirectly connected" with another element interposed therebetween. do.

1 is a schematic flowchart for explaining an antibacterial film manufacturing method according to an embodiment of the present invention.

The antibacterial film manufacturing method according to an embodiment of the present invention is to produce an antimicrobial film with improved durability while inhibiting the proliferation of microorganisms such as viruses and bacteria with strong infectious power such as corona viruses and super bacteria. This method will be referred to as 'this method'.

Referring to FIG. 1 , the method includes a preparation step (S1), a lamination step (S2) and an aging step (S3).

The preparation step (S1) includes the step of preparing the first film (2a) (first lunar edge) to which the copper powder is added (hereinafter, the preparation process).

Microorganisms such as bacteria recognize the copper ions on the copper surface as essential nutrients and absorb them into the cells, and the absorbed copper ions make holes in the cell membrane and the cells?? You lose important nutrients and water (destruction of cell membranes). Copper ions attract free radicals through pores in the cell membrane (accelerating cell damage), and microorganisms such as bacteria eventually severely interfere with respiration and metabolism, and even DNA is damaged and completely killed.

Exemplarily, the first film 2a may include a polyethylene film (PE film), and the first film 2a is obtained by adding copper (Cu) powder to the PE film.

Exemplarily, the first film 2a may be one in which micro-sized copper particles are mounted (added) to the PE film. Illustratively, copper particles may be prepared by being added to a liquid PE film in a molten state before being injected and manufactured into a PE film. As another example, copper particles may be added to the PE film by sputtering, plasma CVD, or the like.

Conventionally, a film with an antibacterial function was prepared by coating an antibacterial solution containing copper on a base film (refer to prior art No. 10-2020-0061305), but the film produced by the prior art as described above has a copper coating layer Since it was thin, the copper coating layer was easily worn, resulting in a short lifespan.

However, this method includes a preparation step (S1) including the preparation process, so that copper particles (copper powder) are added to the PE film rather than coating the surface with an antibacterial solution containing copper on the surface of the first film 2a. ), since the thickness of the film can be made thicker, deterioration of the function due to wear is suppressed, and thus the antibacterial film 2 produced by the present method has the advantage that the service life is extended.

Figure 2 is a schematic view for explaining an antibacterial film manufacturing method according to an embodiment of the present invention, Figure 3 is a view for explaining the mixing process.

1 to 3, the preparation step (S1) includes a step of preparing the pressure-sensitive adhesive (2b) by mixing the raw materials (hereinafter the mixing process).

The pressure-sensitive adhesive 2b may be an acrylic pressure-sensitive adhesive. The pressure-sensitive adhesive 2b may include, for example, urethane and silicone.

Harmful chemicals may be included in the raw materials of the pressure-sensitive adhesive 2b, and the above-described blending process may be performed while the raw materials are mixed in a state contained in the blending barrel (H) disposed in a sealed blending chamber. The mixing cylinder (H) will be described in more detail in the description to be described later.

1 and 2, the laminating step (S2) includes the step of applying the pressure-sensitive adhesive (2b) to the first film (2a) (hereinafter the application process).

After the preparation step (S1), the first film 2a is moved to the coating unit 12 of the manufacturing apparatus 1 where the coating process is performed by the first transfer unit 11 of the manufacturing apparatus 1 .

The first transfer unit 11 and the second transfer unit 13 to be described later may move the first film 2a and the second film 2c from the front end to the rear end, including a roller, for example. Since it is used as a more detailed description will be omitted.

Here, the front end and the rear end are based on the direction in which the first film (2a), the second film (2c), the antibacterial film (2), etc. move in the manufacturing apparatus (1), the first film (2a), The second film (2c), each of the antibacterial film (2) is moved from the front end to the rear end in the manufacturing apparatus (1).

As described above, the first film 2a moved to the coating part 12 by the first transfer part 11 in the coating process is coated with the adhesive 2b by the coating part 12 .

Illustratively, the coating unit 12 may be a micro gravure coating machine, and the micro gravure coating machine is provided between a pair of tension rolls and a pair of tension rolls for moving the first film 2a from the front end to the rear end, and the pressure-sensitive adhesive (2b) is accommodated in the container, disposed on the upper side of the container, a portion of which is immersed in the pressure-sensitive adhesive (2b) and a coating roll (pan, Pan) that rotates in the opposite direction to the rotation direction of the tension roll. can

The coating roll is formed to be smaller than the diameter of the tension roll, so that the pressure-sensitive adhesive 2b can be more precisely applied to the first film 2a.

Figure 4 is a view for explaining the antibacterial film manufactured by the antibacterial film manufacturing method according to an embodiment of the present invention.

1, 2 and 4, the laminating step (S2) includes the step of manufacturing the antibacterial film 2 by laminating the second film 2c on the first film 2a (hereinafter the lamination process). do.

As described above, the first film 2a may be a PE film. In this case, the second film 2c may include a polyethylene terephthalate film (PET) having superior durability and rigidity than the PE film.

The above-described laminating process is performed by the laminating unit 14 of the manufacturing apparatus 1 . More specifically, the first film (2a) coated with the adhesive (2b) on one surface moves from the tension roll of the coating part 12 to the laminating part 14 side, and the second film 2c is the second transfer part It moves to the rear end by (13) and moves to the lamination part 14 side.

The laminating unit 14 is commonly used in the field, and a more detailed description thereof will be omitted.

In the lamination part 14 , the second film 2c may be attached to one surface of the first film 2a to which the adhesive 2b is applied.

In this case, the second film 2c may have a thickness greater than that of the first film 2a, where the thickness means a length in the vertical direction with reference to FIG. 4 .

In this way, the method includes a PET film (Polyethylene Terephthalate film) and laminating a second film 2c having a thickness greater than that of the first film 2a on the first film 2a (S2) By including, it is possible to manufacture a thicker antibacterial film (2), so that the antibacterial film (2) produced by the present method has the advantage that the rigidity and durability are improved and the service life is improved.

More specifically, the thickness of the antibacterial film 2 produced by the present method may be, for example, 350 micrometers or more, and the thickness of the conventional antibacterial solution applied to the antibacterial film is 80 to 150 micrometers. has a thicker thickness compared to Through this, the antibacterial film 2 manufactured by the present method has the above characteristics, so that the service life can be extended.

In addition, since the antibacterial film 2 manufactured by this method has a thick thickness, when it is used and disposed on the object 3 (eg, a desk, etc.), lifting is prevented, and sagging, deformation, etc. are suppressed. there is.

Referring to FIG. 2 , the antibacterial film 2 laminated after the lamination step S2 may be wound on a winding roll of the winding unit 15 to be stored and transported.

5 is a view for explaining the aging step.

1 and 5, the aging step (S3) is a step of maintaining the antibacterial film (2) for a predetermined time (eg, for 24 to 72 hours) at 30 ℃ to 60 ℃.

The aging step (S3) may be performed in an aging room in which the temperature of the inner space in which the antibacterial film 2 is disposed is controlled and maintained.

As such, by including the aging step (S3), the present method has the advantage that the adhesion of the first film (2a) and the second film (2c) can be improved by advancing the reaction of the unreacted adhesive (2b). .

Referring to FIG. 1 , the method may include a printing step S4 of displaying identification information on the first film 2a. Illustratively, the identification information may include a logo or the like, and may be printed on the other surface provided in a direction opposite to the one surface on which the adhesive 2b is applied in the first film 2a.

The printing step (S4) may be performed by a printing machine or the like, and since the method includes the printing step (S4), a user using the antibacterial film 2 produced by the method can be placed on the object 3 by the user. It can be arranged so that the first film 2a is exposed when used.

Although not shown, of course, the method may further include a cutting step of cutting the antibacterial film 2 to a predetermined size.

In the cutting step, the antibacterial film 2 may be cut to 430mm x 300mm in the case of a medium size for general use, and may be cut to 600mm x 400mm in the case of a large size for general use.

On the other hand, in the mixing process of the preparation step (S1), the raw material may contain harmful chemicals, etc., and thus it has been described above that it is accommodated in the mixing vessel (H) in a sealed mixing chamber and blended.

Referring to Figure 6 to describe the mixing barrel (H) in more detail, the base (not shown), the side wall (H1) protruding upward from the rim of the base (not shown), the side wall (H1) covering the top cover ( H2) and a locking means (H3) for coupling the sidewall (H1) and the cover (H2). The cover H2 covers the opening formed by the upper end of the sidewall H1 . Here, the upper side means the upper side with reference to FIG. 6 , and the lower side means the lower side with reference to FIG. 6 .

6, when the locking means (H3) will be described in more detail, the locking means (H3) has a fitting protrusion (H31) protruding downward from the lower end of the cover (H2) and a fitting protrusion at the top of the side wall (H1). (H31) includes a fitting groove (H32) recessed to the lower side to be inserted.

As shown in [C] of FIG. 6 , in a state in which the fitting protrusion H31 is inserted into the fitting groove H32 , the horizontal movement of the cover H2 is restricted to effectively cover the opening.

In addition, the locking means (H3) includes a locking groove (H33) recessed in the horizontal direction from the fitting groove (H32), and a vertical pipe (H341) recessed upward from the lower end of the fitting protrusion (H31), fitting protrusion (H31) and a fluid pipe (H34) including a horizontal pipe (H342) which is recessed in a first direction among horizontal directions from the side of the vertical pipe (H341) and communicates with the vertical pipe (H341). The first direction may be a direction opposite to a second direction d2 described later in FIG. 7 .

In addition, the locking means (H3) may include a first piston (H35) disposed inside the vertical pipe (H341) and a second piston (H37) disposed inside the horizontal pipe (H342). A fluid (eg, air, etc.) may be accommodated in a space formed by the fluid pipe H34, the first piston H35, and the second piston H37.

In addition, the locking means (H3) includes a pressing portion (H36) protruding downward from the lower end of the first piston (H35), and the second direction (d2) opposite to the first direction in the second piston (H37). ) may include a protrusion H381 protruding along the protrusion H381 and an inclined portion H382 protruding downward in the second direction d2 from the protrusion H381 and inserted into the locking groove H33.

In the state in [A] of FIG. 6 , the first piston H35 moves downward by its own weight, and the second piston H37 moves in the first direction by hydraulic pressure. At this time, when the cover (H2) moves to the lower side and the fitting protrusion (H31) is inserted into the fitting groove (H32) as shown in [C] of FIG. One piston (H35) moves upward in the vertical pipe (H341), and the second piston (H37) moves in the second direction (d2) by the hydraulic pressure of the fluid pipe (H34), so that at least Some are inserted into the locking groove (H33).

Through this, the cover (H2) is coupled with the side wall (H1) through only the force to move downward, the horizontal of the cover (H2) with respect to the side wall (H1) by the fitting protrusion (H31) and the fitting groove (H32). At the same time the movement is restricted, at least a portion of the locking part H38 is inserted into the locking groove H33 so that the vertical movement of the cover H2 with respect to the side wall H1 is limited. That is, the cover (H2) has moved only downward, but is coupled to limit horizontal movement and vertical movement with respect to the side wall (H1).

As described above, it is said that the locking portion H38 includes the inclined portion H382, which protrudes in the second direction d2 (the left direction in FIG. 6) when viewed from the front cross-section (see FIG. 6) and is inclined downward. Through this, as shown in [B] of FIG. 6, the pressing part (H36) is slightly pressed by the bottom of the fitting groove (H32) (the fitting protrusion (H31) does not touch the bottom of the fitting groove (H32), and the fitting groove ( H32) is partially inserted) Even when the engaging portion H38 moves a predetermined distance in the second direction d2, the friction between the inclined portion H382 and the fitting groove H32 is minimized, so that the fitting protrusion H31 is more There is an advantage that it can be easily moved downward.

Referring to FIG. 7 , the inclined portion H382 includes an inclined surface H382a inclined with respect to the second direction d2 when viewed from the top (see FIG. 6 from the upper side), and the engaging groove H33 is In a state in which the locking portion H38 and the locking groove H33 are fully engaged, a pressing piece H331 protruding from one side in a direction normal to the inclined surface H382a may be included.

Through this, when the cover H2 is rotated in the vertical direction as the central axis, the inclined portion H382 also rotates in the vertical direction as the central axis. For example, the inclined portion H382 is rotated in a clockwise direction based on FIG. As it rotates, it is pressed by the pressing piece H331 to move in the first direction, and the first piston H35 moves downward by the hydraulic pressure of the fluid pipe H34 to push the bottom of the fitting groove H32. The cover H2 may move upward to release the coupling with the side wall H1 .

The present invention described above with reference to the accompanying drawings is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

Manufacturing left: 1 First transfer unit: 11
Coating part: 12 Second transfer part: 13
Lamination part: 14 Winding part: 15
Antibacterial film: 2 First film: 2a
Adhesive: 2b Second film: 2c
Subject: 3 Mixing Bottle: H

Claims (4)

A preparation step comprising preparing a first film to which copper powder is added and preparing a pressure-sensitive adhesive by mixing raw materials;
Laminating step comprising the steps of applying the adhesive to the first film and laminating a second film on the first film to prepare an antibacterial film; and
Aging step of maintaining the antibacterial film at 30 ℃ to 60 ℃ for a predetermined time;
including,
In the preparation step, the raw material is accommodated in a mixing cylinder, and the mixing cylinder includes a base, a side wall protruding upward from the edge of the base, and a cover covering the upper end of the side wall, and a locking means for coupling the side wall and the cover. ,
The locking means includes a fitting protrusion protruding downward from the lower end of the cover, a fitting groove recessed downward so that the fitting protrusion is inserted from the top of the side wall, a locking groove recessed in the horizontal direction in the fitting groove, and the fitting protrusion A fluid pipe including a vertical pipe recessed upward from the bottom and a horizontal pipe recessed in a first horizontal direction from the side of the fitting protrusion to communicate with the vertical pipe, a first piston disposed inside the vertical pipe , a pressing part protruding downward from the lower end of the first piston, a second piston disposed inside the horizontal tube, a protrusion protruding from the second piston in a second direction opposite to the first direction, and the Including a locking part that protrudes in the second direction to be inclined downward from the protrusion and includes an inclined part inserted into the locking groove,
The inclined portion includes an inclined surface inclined with respect to the second direction when viewed in a plan view, and the locking groove is provided protruding along a normal direction of the inclined surface from one side in a state in which the locking part and the locking groove are fully engaged. An antibacterial film manufacturing method comprising a piece. The method according to claim 1,
Antibacterial film manufacturing method, characterized in that it further comprises a printing step of displaying the identification information on the first film. The method according to claim 1,
The first film includes a PE film (Polyethylene film), and the second film is a PET film (Polyethylene Terephthalate film),
The second film is an antibacterial film manufacturing method, characterized in that thicker than the first film. delete

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