KR20230130207A - Functional Films and the Dental Mirrors and Dental Photo Mirrors with the Functional Films - Google Patents

Abstract

The present invention relates to a multilayer film with anti-fog and antibacterial functions, which can be used for alveolar and oral imaging mirrors used in dentistry, and prevents fogging for a long period of time without modifying or changing the shape of the alveolar or oral imaging mirror or applying additional energy. And antibacterial function can be imparted to alveolar and oral imaging mirrors.

Description

Functional films and photo mirrors for alveolar and oral imaging with functional films applied {Functional Films and the Dental Mirrors and Dental Photo Mirrors with the Functional Films}

The present invention relates to a functional film having an anti-fog function that can prevent fogging and an antibacterial function that can kill bacteria, and its use.

The mirror surface (reflecting surface) and lens area of the alveoloscope, which is a mirror used in dentistry, and oral imaging equipment, can be fogged when observing the inside of the oral cavity, and can be easily contaminated by various types of bacteria that grow in the patient's mouth.

Fog is commonly caused by temperature differences and is a phenomenon caused by fine water droplets formed when moisture in the air is momentarily supersaturated. When fog appears on the surface of a solid, it can absorb, reflect or refract light, reducing the light transmittance of the solid, and when fog appears on a transparent surface such as a mirror or glass, the image formed on the reflective surface becomes blurred. This fogging phenomenon makes it difficult to identify the treatment area inside the oral cavity using an alveoloscope or oral imaging device, so an alternative is needed.

In addition, the inside of the oral cavity has conditions very suitable for the growth of numerous bacteria, so from the moment the alveoloscope and oral imaging devices used in dentistry are placed in the patient's mouth and used, the alveolar scope and oral imaging devices are contaminated with bacteria. There is a risk of

For the above reasons, anti-fogging and anti-bacterial functions are essential for alveolar and oral imaging devices used in dentistry. In relation to this, anti-fogging, etc. are provided in Korean Patent Publication No. 2008-0066106 and Korean Patent Publication No. 2020-0092206. A dental instrument having a function is disclosed.

However, the disclosed technologies are anti-fogging technologies that change the structure, modification, or shape of the alveolar or oral imaging device itself, and require additional and continuous application of energy such as heat or air injection. In addition, if the performance of the device for applying additional energy deteriorates or breaks down, or if the alveolus or oral imaging mirror is damaged during repeated contamination and cleaning, there is a problem of having to install a new instrument or device itself. .

In addition, not only is it impossible to find a device for alveolar and oral imaging that has anti-fogging and antibacterial functions at the same time, but regardless of the type and form of alveolar and oral imaging devices on the market, anti-fogging and antibacterial functions can be achieved simply by attaching a film. There is no technology that can be applied.

Korean Patent Publication No. 2008-0066106 Korean Patent Publication No. 2020-0092206

The present invention provides a functional film that has anti-fog and antibacterial functions at the same time and can be applied without limitation to the types of dental alveoloscopes and oral imaging devices.

The present invention includes a base layer formed of a thermoplastic or thermosetting resin, a functional layer formed of a hydrophilic polymer on top of the base layer, an adhesive layer formed below the base layer, and a release layer formed below the adhesive layer, and the functional layer has a contact angle with water. Provides anti-fog and antibacterial functional films that are below 30° and have antibacterial activity.

In the functional film of the present invention, the functional layer may include a nanostructure in which a plurality of nanowire structures are formed on the surface at regular intervals to increase hydrophilicity and antibacterial properties.

In the functional film of the present invention, the line width and spacing of the nanowire structures on the surface of the functional layer are 1 nm to 500 nm, and the line width of the nano structures and the spacing between nano structures can be adjusted so that the nano wire structures have hydrophilic and antibacterial activity. .

In the functional film of the present invention, the functional layer may include one or more from the group consisting of copper particles, silver particles, and zinc oxide particles.

In the functional film of the present invention, the base layer is formed of one or more thermoplastic or thermosetting resins selected from the group consisting of PET (polyethylene terephthalate), PC (polycarbonate), PE (Polyethylene), and PEN (Polyethylene naphthalate), and has a moisture absorption rate of 1.0. % or less, and the light transmittance may be 85% or more.

The functional film of the present invention may further include a metal layer between the base layer and the adhesive layer.

In the functional film of the present invention, the metal layer may be formed of one or more metals selected from the group consisting of Cr, Ni, Al, Cu, Fe, and Ag.

The functional film of the present invention may further include an adhesive layer between the base layer and the metal layer.

The present invention provides an alveolar film containing the functional film of the present invention.

The present invention provides a film for an oral imaging mirror comprising the functional film of the present invention.

The functional film of the present invention is a functional film with an anti-fogging effect and an anti-bacterial effect that can induce the death of bacteria without fogging on the surface of the film. The suppression of fogging and the anti-bacterial effect are achieved through the physical nanostructure of the film surface. It can be maximized through structure, providing a film with anti-fog and antibacterial functions without chemical or biological treatment.

The functional film of the present invention can be used for dental alveolar or oral imaging mirrors, and can be freely attached to the mirror surface or reflective surface regardless of the type and shape of the alveolar or oral imaging mirror. It can provide anti-fogging and antibacterial effects.

Figure 1 shows the surface structure of the functional film and functional layer of the present invention.
Figure 2 shows an example of a functional film structure of the present invention including a metal layer.
Figure 3 shows another example of the functional film structure of the present invention including a metal layer.
Figure 4 shows the nanostructure of the functional layer according to an embodiment of the present invention, showing a nanowire line width of about 50 nm, a nanowire height of about 50 nm, and a gap between nanowires of about 50 nm.
Figure 5 shows the nanostructure of the functional layer according to an embodiment of the present invention, with a nanowire line width of about 50 nm, a nanowire height of about 300 nm, and a gap between nanowires of about 350 nm.
Figure 6 shows the nanostructure of the functional layer according to an embodiment of the present invention, with a nanowire line width of about 250 nm, a nanowire height of about 100 nm, and a gap between nanowires of about 150 nm.
Figure 7 shows the nanostructure of the functional layer according to an embodiment of the present invention, showing a nanowire line width of about 10 nm, a nanowire height of about 20 nm, and a gap between nanowires of about 10 nm.
Figure 8 is a visual confirmation of the results of E. coli cultivation on the surface of a film without nanostructures, and it can be seen that E. coli has grown in large quantities.
Figure 9 is a visual confirmation of the results of Staphylococcus aureus culture on the surface of a film without nanostructures, and it can be seen that Staphylococcus aureus has proliferated in large quantities.
Figure 10 is a visual confirmation of the results of culturing E. coli on the surface of a functional film according to an embodiment of the present invention, and completely killed E. coli can be confirmed.
Figure 11 is a visual confirmation of the results of Staphylococcus aureus culture on the surface of a functional film according to an embodiment of the present invention, and completely killed Staphylococcus aureus can be confirmed.
Figure 12 shows examples before and after the functional film of the present invention is applied to the alveolus (left: mirror surface of the alveolus without the functional film attached, middle: functional film, right: mirror surface of the alveolus with the functional film attached).
Figure 13 shows the anti-fogging effect of the alveolus to which the functional film of the present invention is attached (left: mirror surface of the alveolus without the functional film attached, right: mirror surface of the alveolus with the functional film attached).
Figure 14 shows an example of an oral imaging mirror attached with a functional film of the present invention (left: functional film, right: oral imaging mirror with functional film attached).
Figure 15 shows the anti-fogging effect of the oral imaging mirror to which the functional film of the present invention is attached (left: oral imaging mirror without functional film attached, right: oral imaging mirror with functional film attached).

Advantages and features of the embodiments of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to be understood by those skilled in the art. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In describing embodiments of the present invention, if a detailed description of a known function or configuration is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. The terms described below are terms defined in consideration of functions in the embodiments of the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification.

The present invention relates to a functional film that has an anti-fogging function and an antibacterial function at the same time, and an alveolar and oral imaging mirror to which the functional film of the present invention is applied.

The present invention is a functional film comprising a base layer formed of a thermoplastic resin or thermosetting resin, a functional layer formed of a hydrophilic polymer on the top of the base layer, an adhesive layer formed below the base layer, and a release layer formed below the adhesive layer, wherein the functional layer is water An anti-fogging and anti-bacterial functional film is provided, which is a base layer having an anti-bacterial activity and a contact angle of 30° or less.

The functional film of the present invention can prevent fogging that occurs when used in the alveoloscope and oral imaging mirror used in dentistry to observe the inside of the oral cavity, and solves the problem of contamination that may occur due to bacteria in the mouth sticking to the alveolar scope and oral imaging mirror. You can.

In the functional film of the present invention, the functional layer has a nanostructure on the surface, and by precise control of the nanostructure, anti-fogging and antibacterial effects can be achieved by physical methods. The functional layer is formed of a hydrophilic polymer and its surface has a plurality of nanostructures, so the hydrophilic properties of the hydrophilic polymer forming the functional layer can be significantly maximized by the arrangement and shape of the nanowire structure. According to one embodiment of the present invention, the functional layer has a contact angle with water of 30° or less, preferably 0° to 30°, and preferably greater than 0° to less than 25°, and this contact angle is formed by the hydrophilic polymer forming the functional layer. This corresponds to a contact angle that is significantly lower than the contact angle of a film without nanostructure manufactured using .

Referring to FIG. 1 to explain the functional layer of the present invention in more detail, the surface of the functional layer 110 is a nanostructure in which a plurality of nanowire structures are arranged at a constant interval (d2) and a concavo-convex structure is repeated. Nanostructures can be formed into precise and uniform shapes by structural molds. In the nanowire structure, the line width (d1) is formed consistently and uniformly, so that the antibacterial and anti-fog effects can be significantly improved at the same time. According to an embodiment of the present invention, the line width of the nanowire structure and the gap between the nanostructures on the surface of the functional layer may be 1㎛ or less, 1㎚ to 500㎚, and in particular, more than 10㎚ but not more than 500㎚ or 15㎚ to 500㎚. A film with significantly improved anti-fog and antibacterial effects can be provided. If the line width of the nanowire structure and the gap between the nanostructures are excessively large, the anti-fog effect and antibacterial activity effect may be impaired, and if the line width and gap between the nanostructures are excessively narrow, the increase in the anti-fog effect and antibacterial activity effect may not be significant. According to another embodiment of the present invention, an antibacterial effect against bacteria such as Escherichia coli and Staphylococcus aureus can be achieved by controlling the nanostructure on the surface of the functional layer, and the antibacterial effect against specific bacteria is significantly amplified by adjusting the gap. It can be.

The nanowire structure formed on the surface of the functional layer of the present invention has a height of 1 nm to 5 μm, 1 nm to 3 μm, 1 nm to 2 μm, 1 nm to 1 μm, preferably 1 nm to 500 nm. If the spacing between nanowire structures is greater than or equal to (nanowire height/nanowire line width ≥ 1), the antifogging and antibacterial effects can be further increased. The line width (d1) of the nanowire structure is 1 nm to 1 μm, preferably 1 nm to 500 nm, and can be adjusted according to the surrounding humidity, temperature, and type of antibacterial target when using the functional film.

The functional layer of the present invention is a transparent layer that may have a light transmittance of 85% or more, 87% or more, or 89% or more, and may further include metal nanoparticles with antibacterial activity, if necessary, to further improve the antibacterial effect. When metal nanoparticles are included, one or more from the group consisting of copper nanoparticles, silver nanoparticles, and zinc oxide nanoparticles may be further included, but are not limited thereto.

In the present invention, the surface nanostructure of the functional layer is formed using a structural mold patterned with intaglio and embossing, so it can include a nanostructure with a very fine nanoscale line width and a large aspect ratio without structural bonding. Since the nanostructure on the surface of the functional layer is formed in the reverse image of the structural mold, the pattern structure of the structural mold can be adjusted according to the shape of the nanostructure to be formed on the surface of the functional layer. Structural molds can be manufactured through a photolithography process by preparing a substrate made of materials such as silicon, glass, and quartz, cleaning the substrate, and then sequentially forming an anti-reflection layer and a photoresist layer on the surface of the substrate. More specifically, a structural mold can be manufactured by nano-patterning and etching the photoresist layer to match the nanostructure to be formed on the surface of the functional layer and removing the antireflection film and substrate. According to one embodiment of the present invention, a silicon structure mold with a nanowire pattern structure is prepared, the pattern of the mold is subjected to hydrophobic treatment, and then a hydrophilic polymer solution for forming a base layer is applied and cured to the nanopattern structure of the mold to form a surface. A functional layer with a nanostructure can be obtained.

The functional layer of the present invention is in the form of a film formed of a hydrophilic polymer, and the hydrophilic polymer for forming the functional layer is not particularly limited. The anti-fog and antibacterial properties of the functional layer film of the present invention are due to its structural characteristics. The functional layer can be formed of a single polymer and can have antifogging and antibacterial activity without adding other ingredients or chemical treatment. According to one embodiment of the present invention, the hydrophilic polymer is not particularly limited as long as it is a polymer having a polar functional group (-OH, -NH ₂ , -NH-, -COOH, -SO ₃ H, etc.), and may include polyurethane, polyvinyl alcohol, One or more selected from the group consisting of polyethylene glycol, polyethyleneimine, polyamide, polyimide, nylon and cellulose, acrylic, and epoxy can be used.

In the functional film of the present invention, the base layer is a layer laminated with the functional layer on the surface opposite to the functional layer and may be formed of a thermoplastic or thermosetting resin, preferably PET (polyethylene terephthalate), PC (polycarbonate), or PE (polyethylene). ) and PEN (Polyethylene naphthalate). According to one embodiment of the present invention, the moisture absorption rate of the base layer may be 1.5% or less, preferably 1.0% or less, and more preferably 0.6% or less, and when a polymer layer with a high moisture absorption rate is used as the base layer, the anti-fogging effect is reduced. It can be. In particular, the functional film for application to the mirror surface of the alveolus or oral imaging mirror (oral mirror) must be very small in size, and because the use environment for the alveolar and oral imaging mirror is the high temperature and high humidity inside the oral cavity, moisture absorption can occur very easily. You can. That is, if the moisture absorption rate of the base layer does not meet a certain level, despite the structural characteristics of the base layer, the present invention may be damaged by moisture absorption through the cross section of the functional film or absorption of water droplets flowing to the outside of the film along the surface of the base layer. The antifogging effect of the functional film may be reduced.

The base layer of the present invention is a transparent layer and may have a light transmittance of 85% or more. If the light transmittance is too low, it may be difficult to confirm the structure in the oral cavity reflected in an alveoloscope or an oral imaging mirror.

In the functional film of the present invention, the adhesive layer is a layer laminated on one side of the base layer, and the base layer is located between the adhesive layer and the functional layer. The adhesive layer may preferably be a polyacrylate-based acrylic resin pressure-sensitive adhesive (PSA), a synthetic rubber adhesive may be used, or a silicone-based adhesive based on acrylic or polydimethylsiloxane or polyphenylsiloxane may be used. You can also use it.

In the functional film of the present invention, a release layer may be laminated on one side of the adhesive layer, and the release layer may be removed when the functional film is applied to an alveolar or oral imaging mirror. The release layer may be a general release liner such as PET, polypropylene, or silicone, but is not particularly limited.

The functional film of the present invention may further include a metal layer between the base layer and the adhesive layer. Referring to FIG. 2, the functional film 100 may include a metal layer 150 positioned between the base layer 120 and the adhesive layer 130. The metal layer can be formed on one side of the base layer by metal deposition through physical vapor deposition, chemical vapor deposition, or atomic layer deposition, or a conventional metal layer deposition film in which a metal layer is formed on a transparent film to be used as a base layer can be used. . The metal layer may be formed of one or more metals selected from the group consisting of Cr, Ni, Al, Cu, Fe, and Ag, and is not particularly limited as long as it is a metal that can function as a reflective surface. The metal layer acts as a reflective surface in the functional film of the present invention, so that the functional film itself can be used as a mirror with a reflective surface. Referring to FIG. 3, the metal layer 150 may be provided by laminating metal foil to the base layer 120 through an additional adhesive layer 160.

The functional film of the present invention can be adjusted to a thickness of about 10 to 1000㎛ depending on the structure and shape of the alveolar and oral imaging mirrors that are applied products. In the functional film, the thickness of the functional layer, base layer, and metal layer can be appropriately adjusted from 10 to 500㎛ depending on the usage environment of the alveolar and oral imaging mirror, and is not particularly limited.

The functional film of the present invention has anti-fog and antibacterial effects in itself and can be applied for alveolar and oral imaging mirror purposes. Application of the functional film of the present invention does not require any additional device configuration, modification, or shape change to the alveolar or oral imaging mirror itself, and provides continuous anti-fog and anti-bacterial effects without applying additional energy for anti-fog or anti-bacterial effects. can be given to the alveolar and oral imaging mirrors.

The dental film containing the functional film of the present invention must be miniaturized to fit the mirror of the dental mirror, and according to one embodiment of the present invention, it has a diameter of 5 cm or less, a diameter of 1 to 5 cm, and a diameter of 2 to 5 cm, more preferably. Typically, it may be a circular film with a diameter of 3 to 4 cm.

The film for an oral imaging mirror containing the functional film of the present invention must be miniaturized to fit an oral imaging mirror, and according to one embodiment of the present invention, it is 1 × 5 cm to 20 × 30 cm (width × height), 2 × 10 cm. It may be a rectangular film of 8×20 cm, preferably 3×10 cm to 7×20 cm, and the film shape can be cut to fit the film for an oral imaging mirror.

Hereinafter, the present invention will be described in more detail through specific examples for carrying out the present invention. The examples are only a reference for explaining the present invention in detail and do not limit the present invention to the examples.

Parts that are not separately defined in the examples can be interpreted according to meanings, specifications, values, analysis or measurement methods (KS standards, JIS, ISO, ASTM, etc.) generally understood by those skilled in the art to which the present invention pertains.

[Production Example 1]

A silicon mold with a nanowire pattern structure was prepared, and the surface of the pattern structure of the mold was subjected to atmospheric pressure plasma treatment in a He atmosphere injected with CH ₄ to impart hydrophobicity. Prepare a polyethylene terephthalate film (PET film, moisture absorption rate 0.6%, light transmittance 92%) as a base layer, and heat-laminate the PET film with corona treatment on one side (1kW) with the acrylic pressure-sensitive adhesive layer formed on the release film to form the base layer. A laminated film with /adhesive layer/release layer formed was prepared. Next, 10 g of the polyurethane solution to form a functional layer is applied to the patterned structure surface of the silicone mold, the prepared laminated film is brought into contact with the top of the applied polyurethane solution, rolled under pressure, cured and dried, and the film is separated from the silicone mold to reduce the thickness. A functional film of approximately 150㎛ was finally produced.

The nanowire line width of the silicon mold was about 50 nm, the nanowire height was about 50 nm, and the spacing between nanowires was about 50 nm. In the nanostructure on the surface of the functional film formed in reverse according to the pattern structure of the silicon mold, the nanowire line width was about 50 nm. It was confirmed that the nanowire height was 50nm, the nanowire height was approximately 50nm, and the spacing between nanowires was approximately 50nm (Figure 4).

[Production Example 2]

Manufactured in the same manner as Preparation Example 1, except that the nanowire line width of the silicon mold was about 350 nm, the nanowire height was about 300 nm, the spacing between nanowires was about 50 nm, and the functional film surface was formed in reverse according to the pattern structure of the silicon mold. In the nanostructure, the nanowire line width was confirmed to be approximately 50 nm, the nanowire height was approximately 300 nm, and the spacing between nanowires was confirmed to be approximately 350 nm (Figure 5).

[Production Example 3]

Manufactured in the same manner as Preparation Example 1, except that the nanowire line width of the silicon mold was about 150 nm, the nanowire height was about 100 nm, the spacing between nanowires was about 250 nm, and the functional film surface was formed in reverse according to the pattern structure of the silicon mold. In the nanostructure, the nanowire line width was confirmed to be approximately 250 nm, the nanowire height was approximately 100 nm, and the spacing between nanowires was confirmed to be approximately 150 nm (Figure 6).

[Production Example 4]

Manufactured in the same manner as Preparation Example 1, except that the nanowire line width of the silicon mold was about 10 nm, the nanowire height was about 20 nm, the spacing between nanowires was about 10 nm, and the functional film surface was formed in reverse according to the pattern structure of the silicon mold. In the nanostructure, the nanowire line width was confirmed to be approximately 10 nm, the nanowire height was approximately 20 nm, and the spacing between nanowires was confirmed to be approximately 10 nm (Figure 7).

[Production Example 5]

A functional film was manufactured in the same manner as Preparation Example 1, using a silicon mold with a nanowire line width of approximately 550 nm, a nanowire height of approximately 650 nm, and a spacing between nanowires of approximately 550 nm. In the functional layer surface structure of the functional film, the nanowire line width was confirmed to be approximately 550 nm, the nanowire height was approximately 650 nm, and the spacing between nanowires was confirmed to be approximately 550 nm.

[Production Example 6]

A functional film was prepared in the same manner as Preparation Example 1, except that a polyurethane solution was used as the solution to form the functional layer, and polyimide (hygroscopicity 1.7%, light transmittance 87%) was used as the base layer.

[Production Example 7]

It was prepared in the same manner as in Preparation Example 1, except that aluminum was deposited on one side of the PET film as the base layer to form a metal layer, and a laminated film consisting of a base layer/metal layer/adhesive layer/release layer was used.

[Production Example 8]

It was prepared in the same manner as Preparation Example 1, except that the PET film as the base layer and the aluminum metal foil were adhered with an EVA (Ethylene Vinyl Acetate) adhesive to form a laminated film consisting of a base layer/adhesive layer/metal layer/adhesive layer/release layer.

The properties of each film manufactured according to the above production example were measured according to the method below. In the case of the sample (specimen) for the fogging test, a circular sample with a diameter of 2.5 cm was prepared considering the size of the alveolar mirror for the alveolar sample, and a sample for oral imaging mirror was prepared as a 15×20 cm sample considering the size of the mirror for oral imaging. A rectangular sample was prepared by cutting it to fit the mirror.

Light transmittance measurement

Light transmittance was measured using a spectrophotometer according to JIS K7105. The functional films of Preparation Examples 1 to 6 all showed a high light transmittance of 89% or more in the visible light range.

Water contact angle measurement

The water contact angle of the film surface (functional layer surface) of each production example was measured with a contact angle meter (DSA 100, KRUSS), and the results are shown in [Table 1].

Antibacterial activity measurement

Antibacterial activity is determined by inoculating bacteria on the surface of the film, checking the degree of bacterial growth with the naked eye, and measuring the number of bacteria (CFU/ml) after 12 hours compared to the initial number of bacteria inoculated as {(initial number of bacteria - number of bacteria after 12 hours)/initial. The degree of antibacterial activity (%) was measured and confirmed according to the number of bacteria}*100 and is shown in [Table 1].

Escherichia coli ( E.coli ) and Staphylococcus aureus ( S. aureus ) were used as target bacteria for antibacterial activity, and the medium and culture method used were prepared and performed according to known methods. The control group used the same film as Preparation Example 1 except that there was no nanostructure.

As a result of visual observation of bacterial growth, in the case of the film without nanostructure, it was confirmed with the naked eye that E. coli was growing in large quantities (FIG. 8), and Staphylococcus aureus was also growing in large quantities (FIG. 9). On the other hand, in the case of the functional film of Preparation Example 1, E. coli was unable to proliferate and was completely killed (Figure 10), and Staphylococcus aureus was also unable to proliferate and was completely killed (Figure 11).

Moisture absorption rate measurement

Moisture absorption rate (%) is IPC-TM-650, 2.6. According to the method, the sample was immersed in water (25°C) for 24 hours and then measured.

How to measure fogging

A steam generating device equipped with a constant temperature water bath and a sample in a dry state were prepared, and water vapor was applied to the surface of the sample, referring to the Korean Industrial Standard KS G 3307 method (anti-fog test for glasses), and then confirmed through anti-fog time. Considering the usage environment of alveolar and oral imaging mirrors, the distance between the water vapor generating area and the sample was set to 5 cm, and the temperature in the constant temperature water bath was maintained at 38°C. The evaluation measured the number of occurrences of fogging within 90 seconds and was conducted a total of 10 times. If the number of occurrences within 90 seconds was 5 or more, it was rated as poor (×), 1 to 4 times as average (△), and 0 times as excellent (○). The results are shown in [Table 1] below.

water
contact angle antibacterial fog coli S. aureus For alveolar use For oral imaging mirror Manufacturing Example 1 8° 99.9% 99.9% ○ ○ Production example 2 18° 99.8% 99.5% ○ ○ Production example 3 17° 99.8% 99.7% ○ ○ Production example 4 25° 97.5% 98.2% △ △ Production example 5 33° 95.8% 96.5% × △ Production example 6 8° 99.9% 99.9% △ △ Production example 7 8° 99.9% 99.9% ○ ○ Production example 8 8° 99.9% 99.9% ○ ○

Looking at the results in [Table 1], it can be seen that the contact angle of the functional film and the bacterial killing effect can be maximized by adjusting the spacing between nanowires and the nanowire line width. If the spacing, line width, and height between the nanowires of the functional layer are too narrow or low, the contact angle and antibacterial activity may be poor, and fogging may occur even when applying the functional film to an actual alveolar or oral imaging mirror. Even if the spacing, line width, and height between the nanowires of the functional layer are too wide or high, the contact angle and antibacterial activity may be poor, and fogging may occur even when applying the functional film to an actual alveolar or oral imaging mirror. In addition, if a base layer with an excessively high moisture absorption rate is used, the refractive index increases and the distortion of the reflected image becomes severe, which may make it unsuitable as a functional film for alveolar and oral imaging mirrors. In addition, a functional film further including a metal layer can achieve the anti-fog and antibacterial properties desired in the present invention, and the metal layer functions as a reflective surface, so the functional film itself can have a mirror-like function.

[Example 1]

The functional film of Preparation Example 1 was adhered to the mirror surface of the alveolus (see right side of Figure 12), and the degree of fogging of the alveolus with the functional film adhered and the alveolus without the functional film was confirmed. In the case of the mirror surface of a regular alveolus without a functional film attached, the reflector was not identified due to significant fogging when water vapor was applied or in a high temperature and high humidity environment (left side of Figure 13), and in the case of the mirror surface of an alveolus with a functional film attached, water vapor was present. Even if it was applied or placed in a high temperature and humidity environment, fogging did not appear and the reflector was clearly identified (right side of Figure 13).

[Example 2]

The functional film of Preparation Example 1 was attached to a mirror for oral imaging (see right of FIG. 14), and the degree of fogging of the mirror for oral imaging was checked before and after the functional film was attached. In the case of an oral imaging mirror without a functional film attached, the reflector was not identified due to significant fogging in a high-temperature and humid environment or when water vapor was applied (left side of Figure 15). In the case of an oral imaging mirror with a functional film attached, water vapor was applied or the reflector was not identified (left side of Figure 15). Even when placed in a high temperature and humidity environment, fogging did not appear and the reflector was clearly identified (right side of Figure 15).

100: Functional film
110: functional layer
120: base layer
130: Adhesive layer
140: release layer
150: metal layer
160: Adhesive layer

Claims (12)

A base layer formed of thermoplastic or thermosetting resin;
A functional layer formed of a hydrophilic polymer on top of the base layer;
An adhesive layer formed below the base layer; and
A functional film including a release layer formed below the adhesive layer,
The functional layer is an anti-fog and antibacterial functional film that is a base layer with a contact angle with water of 30° or less and has antibacterial activity.
According to paragraph 1,
The functional layer is formed of a structural mold with a nanopattern, and a plurality of nanowire structures are formed on the surface at regular intervals to increase hydrophilicity and antibacterial properties. An anti-fogging and antibacterial functional film that is a functional layer containing a nanostructure.
According to paragraph 2,
The line width and spacing of the nanowire structure on the surface of the functional layer are 1 nm to 500 nm, and the line width and spacing of the nanowire structure are adjusted to have hydrophilic and antibacterial properties.
According to paragraph 1,
The base layer is formed of one or more thermoplastic or thermosetting resins selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polyethylene (PE), and polyethylene naphthalate (PEN), has a moisture absorption rate of 1.0% or less, and has a light transmittance of 1.0% or less. Anti-fog and antibacterial functional film with an anti-fogging and anti-bacterial film of over 85%.
According to paragraph 3,
The functional layer is an anti-fogging and antibacterial functional film comprising one or more from the group consisting of copper particles, silver particles, and zinc oxide particles.
According to paragraph 1,
An anti-fog and antibacterial functional film further comprising a metal layer between the base layer and the adhesive layer.
According to clause 6,
The metal layer is an anti-fog and antibacterial functional film formed of one or more metals selected from the group consisting of Cr, Ni, Al, Cu, Fe, and Ag.
According to clause 6,
An anti-fog and antibacterial functional film further comprising an adhesive layer between the base layer and the metal layer.
An alveolar film comprising the functional film of any one of claims 1 to 8.
According to clause 9,
An alveolar film having a diameter of 1 to 5 cm, which is the diameter of the alveolar film.
A film for an oral imaging mirror comprising the functional film of any one of claims 1 to 8.
According to clause 11,
The film for an oral imaging mirror is a film for an oral imaging mirror having a square shape of 1×5 cm to 20×30 cm.