KR102399095B1 - Smart plastic glazing and manufacturing method for the same - Google Patents

Abstract

The present invention relates to a method for manufacturing a smart plastic glazing having excellent reliability by forming a high hardness coating layer, wherein the smart plastic glazing includes a base layer made of PC (polycarbonate) resin, and a polymer-dispersed (PDLC) laminated on the base layer. Liquid Crystal) film, and a coating layer laminated on the PDLC film. With this configuration, it is possible to obtain an effect of improving scratch resistance, abrasion resistance, chemical resistance, and light resistance by forming a high hardness coating layer on the base layer made of PC.

Description

SMART PLASTIC GLAZING AND MANUFACTURING METHOD FOR THE SAME

The present invention relates to a smart plastic glazing and a manufacturing method thereof, and more particularly, to a smart plastic glazing having excellent reliability by forming a high hardness coating layer and a manufacturing method thereof.

Polycarbonate (PC) is a representative thermoplastic material with a thermal deformation temperature of 135°C or higher. It is widely used for many purposes, including

Using the excellent impact resistance, transparency, and moldability of such polycarbonate, it is widely used as a glazing material. In particular, studies are being actively made to apply polycarbonate as a substitute for metal and glass articles in the construction and automobile industries. It provides new uses to the construction and automobile industries by using excellent impact strength, optical transmittance, and moldability that can be applied to various designs.

In particular, in the case of replacing plastic glazing using polycarbonate with glass products in the construction industry, it is not easily damaged, and construction is easy due to light weight, and safety accidents due to damage can be prevented.

And, when the plastic glazing using polycarbonate is replaced with glass products in the automobile industry in the automobile industry, the center of gravity of the vehicle is lowered, thereby enabling safer operation. Moreover, since the weight reduction of the vehicle increases fuel efficiency, the economical advantage is sufficient.

However, polycarbonate, which is considered as an alternative material for glass, is easily scratched and

Therefore, in order to replace the polycarbonate with a glass product, efforts to improve scratch resistance, abrasion resistance, chemical resistance, and light resistance are required.

Korean Patent Registration No. 1727906 (2017.04.12)

The present invention was devised to solve the above problems, and an object of the present invention is to provide a smart plastic glazing having excellent reliability by forming a high hardness coating layer and a method for manufacturing the same.

And, according to the present invention, an object of the present invention is to provide a smart plastic glazing capable of reducing odor generation by containing a UV stabilizer in the PC resin for producing the base layer, and a method for manufacturing the same.

Smart plastic glazing according to a preferred embodiment of the present invention in order to achieve the above object, a base layer made of PC (polycarbonate) resin; a polymer-dispersed liquid crystal (PDLC) film laminated on the base layer; and a coating layer laminated on the PDLC film.

Here, the base layer is a base layer prepared by adding a UV stabilizer to PC resin; and a reinforcing layer laminated on at least one surface of the base layer and prepared by adding a UV stabilizer in an amount less than that of the base layer to the PC resin.

And, the UV stabilizer, benzophenone, benzotriazole, oxanilide, at least any one or more of benzoate may be used.

And, the base layer is produced by containing 0.5 to 1.5w% of the UV stabilizer relative to the total weight of the base layer, and the reinforcing layer is produced by containing 2.5 to 3.5w% of the UV stabilizer relative to the total weight of the reinforcing layer can be

The coating layer may be made of a coating solution prepared by chemically bonding silica to an epoxy resin.

In order to achieve the above object, a method for manufacturing a smart plastic glazing according to a preferred embodiment of the present invention includes a substrate layer supply step of supplying a substrate layer made of a PC (polycarbonate) resin containing a UV stabilizer; an adhesive supply step of applying an adhesive to one surface of the base layer; a PDLC film supply step of seating a polymer-dispersed liquid crystal (PDLC) film on the upper side of the adhesive applied to the base layer; A PDLC film attachment step of attaching to the base layer by pressing the supplied PDLC film; a release film supply step of supplying a release film to be laminated on the PDLC film; a coating solution application step of applying a coating solution to one surface of the supplied release film so as to form a coating layer between the PDLC film and the release film; and a coating layer forming step of forming a coating layer while attaching the release film to the PDLC film by pressing the release film to which the coating solution is applied.

Here, the step of supplying the base layer comprises: a base layer production step of preparing a base layer by containing 0.5 to 1.5w% of a UV stabilizer based on the total weight of the PC resin; A reinforcing layer production step of preparing a reinforcing layer by containing 2.5 to 3.5w% of a UV stabilizer based on the total weight of the PC resin; and a base layer manufacturing step of manufacturing the base layer by laminating the reinforcing layer on at least one surface of the base layer.

And, the UV stabilizer, benzophenone, benzotriazole, oxanilide, may be made to use at least any one or more of benzoate.

The step of supplying the base layer may further include a drying step of drying the fabricated base layer at a temperature of 60 to 100° C. for 80 to 140 minutes.

The PDLC film attaching step may include a PDLC film pressing step in which a plurality of rollers press the PDLC film; and an adhesive curing step of curing the adhesive by irradiating UV to the PDLC film.

More specifically, the step of pressing the PDLC film may include: a first moving step of removing air bubbles contained by moving the adhesive applied by pressing with a first roller in a first direction; a second moving step of adjusting the thickness by moving the adhesive moved in the first direction in a second direction by pressing with a second roller; and a flattening step of flattening the adhesive by pressing it with a third roller.

Here, in the first moving step, the first roller may be provided as a convex roller whose diameter increases toward the center, and may be configured to move the applied adhesive to the outside.

In addition, the first moving step may be made to use a different deviation of the outer diameter with respect to the center diameter of the first roller in correspondence to the thickness of the adhesive layer.

For example, in the first moving step, when the thickness of the adhesive layer is formed to be 50 to 100 μm, the outer diameter of the first roller may be formed to be 10 to 4 mm smaller than the central diameter.

In the second moving step, the second roller may be provided as a roller having a concave shape whose diameter decreases toward the center, and may be configured to move the adhesive moved outward to the inside.

For example, in the second moving step, the outer diameter of the second roller may be formed to be 0.2 to 0.4 mm larger than the central diameter and used.

In the planarization step, the third roller may be made of a silicone material having a hardness of 60 to 80 and a smooth roller having the same diameter to spread the adhesive flat.

The curing step may be made to cure the adhesive by irradiating ultraviolet rays with a wavelength of 200 to 300 nm with an amount of light of 3000 to 4000 mJ/cm ² .

The coating solution application step may include: a coating solution discharging step of discharging the coating solution on one surface of the release film through a coating solution discharging device in which the coating solution is stored; A flattening step of flattening the coating solution discharged on one surface of the release film through a coating knife to have a predetermined thickness; and a preliminary curing step of preliminarily curing the coating solution spread to a certain thickness so that it does not flow down.

Here, the pre-curing step may be performed to pre-cure the coating solution by applying heat of 70 to 80° C. through a pre-curing device.

The coating layer forming step may include a release film pressing step in which a roller presses the release film; and a coating layer curing step of curing the coating solution by irradiating UV to the release film.

For example, the coating layer curing step may be made to cure the coating solution by irradiating ultraviolet rays with a wavelength of 200 to 300 nm with an amount of light of 3000 to 4000 mJ/cm ² .

In the coating solution application step, the organic-inorganic hybrid compound may be applied as a coating solution.

For example, the coating solution application step may be made by applying a coating solution prepared by chemically bonding silica to an epoxy resin.

The release film supply step may be made to supply a fluorine release film so that it can be easily peeled off with respect to the adhesive surface with the coating layer.

Furthermore, the release film supply step further supplies a release film to be laminated on the other surface of the base layer, and the coating solution application step is the release film supplied so that a coating layer is additionally formed between the base layer and the release film. By applying a coating solution to one surface of the, it may be made to form a coating layer on both sides of the base layer.

The adhesive supply step may be made to supply a certain amount of adhesive through a discharge pump to a discharge device for applying the adhesive to the surface of the base layer from the storage tank in which the adhesive is stored.

And, the adhesive recovery step of recovering the adhesive through a recovery pump from the recovery tray for storing the adhesive flowing down from the base layer to the storage tank; may be made to further include.

According to the manufacturing method of the smart plastic glazing according to the present invention, the effect of improving scratch resistance, abrasion resistance, chemical resistance, and light resistance by providing a manufacturing method of forming a coating layer of high hardness on a base layer made of polycarbonate can be obtained

And, according to the present invention, it is possible to obtain the effect of reducing the generation of odors by containing a UV stabilizer in the PC resin for producing the base layer.

1 is a cross-sectional view schematically showing a smart plastic glazing according to an embodiment of the present invention;
2 is a view schematically showing a method of manufacturing a smart plastic glazing according to an embodiment of the present invention;
3 is a view schematically showing a method of forming a coating layer on both sides of a base layer in a method of manufacturing a smart plastic glazing according to an embodiment of the present invention;
4 is a view schematically showing a plurality of rollers used in the step of attaching a PDLC film in the manufacturing method of smart plastic glazing according to an embodiment of the present invention;
5 is a plan view schematically showing a plurality of rollers used in the step of attaching a PDLC film in the method of manufacturing a smart plastic glazing according to an embodiment of the present invention;
Figure 6 is a view schematically showing the path the adhesive moves by a plurality of rollers in the manufacturing method of the smart plastic glazing according to an embodiment of the present invention;
7 is a view schematically showing the device used in the adhesive supply step in the manufacturing method of the smart plastic glazing according to an embodiment of the present invention;
8 is a flowchart schematically showing a method for manufacturing a smart plastic glazing according to an embodiment of the present invention;
9 is a flowchart schematically showing the step of supplying the substrate layer in the method of manufacturing a smart plastic glazing according to an embodiment of the present invention;
10 is a flowchart schematically showing the coating solution application step in the method for manufacturing a smart plastic glazing according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. This is not intended to limit the present invention to specific embodiments, and should be construed to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, terms such as first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The above terms are only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

The term “and/or” may include a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but other components may exist in between. can be understood On the other hand, when an element is referred to as being “directly connected” or “directly connected” to another element, it may be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression may include the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and one or more other features It may be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, may 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 a commonly used dictionary may be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, it is interpreted in an ideal or excessively formal meaning. it may not be

In addition, the following embodiments are provided to more completely explain to those with average knowledge in the art, and the shapes and sizes of elements in the drawings may be exaggerated for more clear explanation.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view schematically showing a smart plastic glazing manufactured by a method of manufacturing a smart plastic glazing in an embodiment of the present invention, and FIGS. 2 and 3 are views schematically showing a manufacturing method of the smart plastic glazing 4 to 6 are views schematically showing a plurality of rollers used in the step of attaching the PDLC film in the manufacturing method of the smart plastic glazing. And, Figure 7 is a view schematically showing the device used in the adhesive supply step in the manufacturing method of the smart plastic glazing.

And, FIG. 8 is a flowchart schematically showing the manufacturing method of the smart plastic glazing, FIG. 9 is a flowchart schematically showing the substrate layer supply step in the manufacturing method of the smart plastic glazing, and FIG. 10 is the smart plastic glazing It is a flowchart schematically showing the coating solution application step in the manufacturing method.

1 to 10, the method of manufacturing a smart plastic glazing according to an embodiment of the present invention is a base layer supply step ( S110), an adhesive supply step (S120) of applying an adhesive 130a to one surface of the base layer 110, and a PDLC film 120 on the upper side of the adhesive 130a applied to the base layer 110 A PDLC film supply step (S130) for seating the A release film supply step (S160) of supplying the release film 150 to be laminated, and the release film 150 supplied to form a coating layer 140 between the PDLC film 120 and the release film 150 A coating solution application step (S170) of applying a coating solution to one surface, and pressing the release film 150 to which the coating solution is applied to form a coating layer 140 while attaching the release film 150 to the PDLC film 120 Including the coating layer forming step (S180, S190).

The base layer supply step (S110) is a step of continuously supplying the PC film produced by containing the UV stabilizer to the base layer 110 . Of course, although not shown in the drawings, the base layer may be continuously supplied through injection molding.

And, the base layer supply step (S110) is a base layer production step (S111) to produce a base layer by mixing a UV stabilizer with PC resin, and a reinforcing layer production step (S112) for producing a reinforcing layer by mixing a UV stabilizer with PC resin ), and laminating the reinforcing layer on at least one surface of the base layer to produce the base layer (S113).

That is, the base layer 110 may be manufactured by laminating a base layer and a reinforcing layer, and the base layer and the reinforcing layer may be manufactured by containing different amounts of UV stabilizers. In this case, more UV stabilizers may be contained in the reinforcing layer.

As an example, in the base layer manufacturing step (S111), the base layer may be manufactured by mixing 0.5 to 1.5w% of a UV stabilizer in PC resin with respect to the total weight.

And, in the reinforcing layer manufacturing step (S112), a reinforcing layer may be manufactured by mixing 2.5 to 3.5w% of a UV stabilizer in PC resin with respect to the total weight.

And, the base layer manufacturing step (S113) is a step of manufacturing the base layer 110 by laminating a reinforcing layer on the base layer, and laminating the reinforcing layer only on one surface of the base layer to produce a base layer, or By laminating the reinforcing layer on both sides, the base layer may be manufactured. It can be manufactured differently depending on the conditions under which the smart plastic glazing is used and the required thickness.

Here, the UV stabilizer may be at least any one or more of benzophenone, benzotriazole, oxanilide, and benzoate.

For example, the benzophenone may be any one of 2,4-Dihydroxybenzophenone, 2,2'-Dihydroxy-4-methoxy benzophenone, 2-Hydroxy-4-methoxybenzophenone, and 2-Hydorxy-4-(octyloxy)benzophenone.

And, the benzotriazole is 2-(2-Hydroxy-5-methylphenyl) benzotriazole, 2-(2H-Benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl) phenol, 2-( 2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl) phenol, 2-tert-Butyl-6-(5-chloro-2H-benzotriazol-2-yl)-4-methylphenol , of 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol, 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol It can be any one.

And, the oxanilide may be N-(2-Ehtoxyphenyl)-N'-(2-ethylphenyl)oxamide.

And, the benzoate may be 4-tert-Butylphenyl Salicylate.

It may further include a drying step (S114) of drying the base layer produced in the base layer production step (S113).

More specifically, the drying step (S114) is a step of drying the fabricated base layer at a temperature of 60 to 100° C. for 80 to 140 minutes.

That is, the strength of the odor generated in the base layer 110 is changed according to the drying temperature condition.

Table 1 below is a table showing the TVOC emission amount and odor grade according to the drying temperature conditions.

Here, as for the odor grade, grade 1 is odorless (none), grade 2 is odor detection (threshold), grade 3 is moderate odor, grade 4 is strong odor, and grade 5 is very strong odor. , grade 6 is classified as over strong odor.

And, the odor grade is subdivided into 0.5 units according to the intensity of the odor, and grades 1 to 3 are judged to be grades that can be used as products, and grades 4 or higher are judged as failing.

Comparative Example 1 Example 1 Example 2 Example 3 dry conditions room temperature 60℃ 120min 80℃ 120min 100℃ 120min TVOC (ug/m ³ ) 21,000 15,000 8,600 4,300 odor grade 4.0 3.5 2.8 2.3

As shown in Table 1, Comparative Example 1 dried at room temperature had a strong odor with an odor grade of 4 and a TVOC generation amount of 21,000 ug/m ³ , generating a large amount of TVOC.

In comparison, Examples 1 to 3 dried at 60° C. or higher had a odor rating of 3.5 or less, and the amount of TVOC generation was also reduced to 15,000 ug/m ³ or less.

And, if the drying temperature exceeds 100 ℃, since thermal deformation may occur in the substrate layer, it is preferable to dry the drying temperature at 100 ℃ or less.

Therefore, in the present invention, it was dried at a temperature of 60 to 100° C. for 80 to 140 minutes to prevent thermal deformation of the base layer while reducing odor and the amount of TVOC generation.

The adhesive supply step (S120) is a step of supplying an adhesive 130a between the base layer 110 and the PDLC film 120 in order to adhere the PDLC film 120 to the base layer 110 .

As an example, in the adhesive supply step (S120), referring to FIG. 7 , an adhesive discharging device for applying the adhesive 130a to the surface of the substrate layer 110 from the storage tank 212 in which the adhesive 130a is stored ( It may be configured to supply a certain amount of adhesive to the 211 through the discharge pump 213 . That is, since the base layer 110 is continuously supplied, a predetermined amount of the adhesive 130a may be continuously supplied to the upper side of the base layer 110 .

In addition, the method may further include an adhesive recovery step of recovering the adhesive from the recovery tray 214 for storing the adhesive 130a flowing down from the base layer 110 to the storage tank 212 through the recovery pump 215 . there is. That is, as shown in FIG. 7 , when the adhesive 130a is applied to the base layer 110 through the adhesive discharging device 211 , the PDLC film 120 is seated on the upper side of the applied adhesive 130a. Then, the PDLC film 120 is pressed by the first roller 221 , in which case the adhesive 130a may flow down to both sides of the base layer 110 . The dripping adhesive may be stored by falling on the recovery tray 214 , and the adhesive stored by falling onto the recovery tray 214 by the recovery pump 215 may be discharged to and stored in the storage tank 212 . Therefore, after the adhesive is sufficiently supplied to the base layer 110 , the adhesive flowing down to both sides of the base layer 110 by the pressing force can be recovered and recycled.

The PDLC film attaching steps (S140, S150) is a step of attaching to the base layer 110 by pressing the PDLC film 120 supplied to the upper side of the adhesive 130a.

Here, the PDLC film attaching step (S140, S150) includes a PDLC film pressing step (S140) in which a plurality of rollers (221, 222, 223) press the PDLC film 120, and UV to the PDLC film 120. and an adhesive curing step (S150) of curing the adhesive 130a by irradiating it.

For example, the pressing step (S140) of the PDLC film includes a first moving step of removing air bubbles contained by moving the adhesive applied by pressing with a first roller 221 in a first direction, and a second roller 222. It may include a second moving step of adjusting the thickness by moving the adhesive moved in the first direction by pressing in the second direction, and a flattening step of flattening the adhesive by pressing with the third roller 223 .

More specifically, in the first moving step, as shown in FIGS. 4 to 6 , the first roller 221 is provided as a convex roller whose diameter increases toward the center, and the applied adhesive is moved in the first direction. It may be moved to the outside of the phosphorous base layer 110 . Since the adhesive 130a discharged from the discharging device 211 can be applied only to the central region of the base layer 110, the first roller 221 is provided in a convex shape to remove the adhesive applied only to the central region. Both ends of the base layer 110 may be moved to the outside.

In addition, when the adhesive is moved to the outside through the first roller 221 , bubbles contained in the adhesive can be removed, so that non-uniform adhesion caused by the bubbles can be prevented.

The first roller 221 may be provided differently according to the thickness of the adhesive layer to be formed with a deviation of the outer diameter with respect to the central diameter.

For example, when the adhesive layer 130 has a thickness of 50 to 100 μm, it is preferable to form an outer diameter of the first roller 221 smaller than a central diameter by 10 to 4 mm. That is, when the thickness of the adhesive layer 130 is formed to be 50 μm, since the thickness of the adhesive layer 130 is reduced, the outer diameter of the first roller 221 is increased so that the adhesive distributed in the center can move a lot to the outside. It can be formed to be 10 mm smaller than the center diameter.

And, in the second moving step, the second roller 222 is provided as a roller of a concave shape whose diameter becomes smaller toward the center, and the adhesive moved outward in the first direction is transferred to the inner side in the second direction, that is, the substrate layer. It can be moved to the central region of (110).

Here, it is preferable to use the outer diameter of the second roller 222 to be 0.2 to 0.4 mm larger than the central diameter. That is, the second roller 222 moves a part of the adhesive distributed outside of the base layer 110 to the central region of the base layer 110 so that the adhesive is applied over the entire area of the base layer 110 . It can be evenly distributed to some extent. Therefore, the second roller 222 is made such that the deviation between the outer diameter and the center diameter is not large.

The flattening step is a step of flattening the adhesive by pressing the adhesive evenly distributed through the second roller 222 with the third roller 223, which is a smooth roller having the same diameter.

Here, the third roller 223 functions to flatly spread the adhesive while pressing the PDLC film 120 with a certain force. It may be provided as

In this way, as shown in FIG. 6 , the movement path L of the adhesive moves in a wavy pattern so that air bubbles are removed and evenly distributed throughout. That is, it is possible to remove air bubbles contained in the adhesive by moving the adhesive to the outside through the first roller 221, and by moving the adhesive back to the center through the second roller 222, the adhesive is distributed to some extent evenly. Then, the adhesive may be spread evenly through the third roller 223 to evenly distribute the adhesive.

In addition, primary rubbing of the adhesive occurs while moving the adhesive to the outside through the first roller 221 and the second roller 222, and the secondary rubbing of the adhesive occurs while moving inward again. , the adhesive strength of the adhesive may be improved by such an adhesive rubbing phenomenon.

Further, the first roller 221 may be provided as a heat roller heated to a temperature of 80 to 100 ℃.

That is, the adhesive 130a is prepared in a solvent type, and as a solvent, at least one of methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, and butyl acetate. When either one is used, the solvent may be volatilized through the first roller 221 provided as a heat roller so that the adhesive 130a may be rapidly cured in a subsequent curing step. Of course, the adhesive 130a may be provided in a solvent-free type.

Of course, not only the first roller 221 but also the second roller 222 and the third roller 223 may be provided as heat rollers to be heated.

In the adhesive curing step (S150), the adhesive is applied between the base layer 110 and the PDLC film 120 through a curing device 230 that irradiates UV to the PDLC film 120. It is a step of forming the adhesive layer 130 by curing.

At this time, the adhesive curing step (S150) may be made to harden the adhesive by irradiating ultraviolet rays with a wavelength of 200 to 300 nm with an amount of light of 3000 to 4000 mJ/cm ² . Of course, conditions for curing the adhesive are not limited thereto, and the curing conditions of the adhesive may be changed in response to the thickness of the adhesive layer 130 and the PDLC film 120 and process environmental conditions.

The PDLC film supply step (S130) is a step of supplying a PDLC film 120 to one surface of the base layer 110, and as shown in FIG. The PDLC film 120 may be supplied to one surface of the base layer 110 through a roller 216 .

The PDLC film is a polymer-dispersed liquid crystal (PDLC) film. When electricity is not supplied, the liquid crystal inside is arranged with an arbitrary direction and absorbs or scatters light to become opaque. The liquid crystal is aligned in the direction of electricity and has a property of allowing light to pass through and becoming transparent.

The PDLC film may be formed by laminating an ITO electrode film and a liquid crystal film between a PC film or a PET (polyethylene terephthalate) film. Of course, the present invention is not limited thereto, and various types of known PDLC films may be applied.

The release film supply step ( S160 ) is a step of supplying the release film 150 to be laminated on the PDLC film 120 .

More specifically, the release film supply step (S160) may be made to continuously supply the release film 150 through the release film supply roller 236 on which the previously manufactured release film 150 is wound. In the step of supplying the release film ( S160 ), a fluorine release film may be supplied so that it can be peeled off with respect to the adhesive surface with the coating layer 140 . That is, the release film 150 is provided to form the coating layer 140 in the manufacturing process, serves to protect the coating layer 140 in the distribution process, and is peeled off from the coating layer 140 after installation. provided to be removed.

The coating solution application step (S170) is a step of applying a coating solution to one surface of the supplied release film 150 so that a coating layer 140 is formed between the PDLC film 120 and the release film 150.

More specifically, the coating solution application step (S170) is a coating solution discharging step (S171) of discharging the coating solution on one surface of the release film 150 through the coating solution discharging device 231 in which the coating solution is stored, and a coating knife 232. A planarization step (S172) of flattening the coating solution discharged to one surface of the release film 150 through a predetermined thickness to have a predetermined thickness, and a pre-curing device 233 to prevent the coating solution spread to a predetermined thickness from flowing down. It may include a preliminary curing step (S173) of curing.

In the coating solution discharging step ( S171 ), the coating solution discharging device 231 may operate to continuously supply a predetermined amount of the coating solution to one surface of the continuously supplied release film 150 .

And, in the planarization step (S172), the coating solution applied to the release film 150 passes through the coating knife 232 and is evenly spread over the entire surface of the release film 150 while having a predetermined thickness. Here, it may be made to adjust the thickness of the coating solution to be laminated by adjusting the distance between the coating knife 232 and the release film 150 .

In the pre-curing step (S173), the coating solution passes through the coating knife 232 and is preliminarily cured in the pre-curing device 233 so that the coating solution spread to a predetermined thickness does not flow down from the release film 150. That is, the pre-curing step (S173) does not completely cure the coating solution, but applies heat of 70 to 80° C. It can be made to harden aggressively.

Here, the coating solution may be prepared in a solvent type, and the solvent is at least any one of methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, and butyl acetate. In the case of using one, the solvent may be volatilized through the preliminary curing step ( S173 ) to maintain the shape so as not to flow down while attached to the release film 150 . Of course, the coating solution may be prepared in a solvent-free type.

The coating layer forming step (S180, S190) is a step of forming the coating layer 140 while attaching the release film 150 to the base layer 110 by pressing the release film 150 to which the coating solution is applied.

More specifically, the coating layer forming step (S180, S190) is a release film pressing step (S180) in which the roller 234 presses the release film 150, and a curing device 235 is applied to the release film 150. It may include a coating layer curing step (S190) of curing the coating solution by irradiating UV.

In the step of pressing the release film ( S180 ), the roller 234 presses the release film 150 at a predetermined pressure to flatten the coating solution. In addition, in the step of pressing the release film ( S180 ), the thickness of the coating layer 140 may be adjusted by adjusting the height at which the release film 150 is pressed.

In the coating layer curing step (S190), the coating layer 140 is formed by completely curing the coating solution through the curing device 235 on the release film 150 that has passed the release film pressing step (S180). At this time, in the coating layer curing step (S190), the coating solution can be cured by irradiating ultraviolet rays with a wavelength of 200 to 300 nm with an amount of light of 3000 to 4000 mJ/cm ² .

Furthermore, the coating solution application step (S170) may be made to apply the organic-inorganic hybrid compound as a coating solution.

In addition, the organic-inorganic hybrid compound may be formed by chemically bonding silica to an epoxy resin. Here, when the content of silica increases, the hardness increases but flexibility decreases, and when the content of the epoxy resin increases, the flexibility increases but the hardness decreases. .

Here, the organic-inorganic hybrid compound may be formed by chemically bonding an epoxy resin and silica, rather than simply mixing them.

A simple mixture of an epoxy resin and silica has the advantage of being easily prepared, but has disadvantages in that the transmittance is poor, the surface hardness is low, and the light resistance, weather resistance and chemical resistance are not good.

In comparison, if the epoxy resin and silica are chemically combined, it is difficult to manufacture, but transmittance can be secured at 89% or more, hardness and flexibility are excellent, light resistance, weather resistance and chemical resistance are excellent, and diffuse reflection And there is an advantage that refraction does not occur.

Therefore, the smart plastic glazing according to an embodiment of the present invention forms a coating layer by chemically combining an epoxy resin and silica.

And, the manufacturing method of the smart plastic glazing according to an embodiment of the present invention may be made to form the coating layer 140 on both sides.

That is, as shown in FIG. 3 , in the release film supply step (S160), the release film 150 is additionally supplied to be laminated on the other surface of the base layer 110, and the coating solution application step (S170) is the A coating solution is applied to one surface of the supplied release film 150 so that a coating layer is additionally formed between the base layer 110 and the release film 150 to form a coating layer on both sides of the base layer 110 . can be done

The smart plastic glazing 100 manufactured by the method of manufacturing such a smart plastic glazing according to an embodiment of the present invention may be manufactured in two types as an example.

More specifically, as shown in (a) of FIG. 1 , the PDLC film 120 is laminated on the base layer 110 through the adhesive layer 130 , and the coating layer 140 and the release film 150 on the PDLC film. This laminated smart plastic glazing 100 can be manufactured. At this time, the coating layer 140 is laminated on the PDLC film 120 and the release film 150 is laminated so as to be disposed on the outermost side. Although not shown in the drawings, the PDLC film 120 , the coating layer 140 , and the release film 150 may be laminated on both surfaces of the base layer 110 .

And, as shown in (b) of Figure 1, the PDLC film 120 is laminated on one surface of the base layer 110 through the adhesive layer 130, the coating layer 140 and the release film on the PDLC film 120. 150 is laminated, and the coating layer 140 and the release film 150 are additionally laminated on the other surface of the base layer 110 to manufacture the smart plastic glazing 100 .

Here, the release film 150 serves to protect the coating layer 140 during the distribution and installation process of the smart plastic glazing 100, and is provided to be peeled off and removed from the coating layer 140 after installation.

And, the base layer 110 is a base layer produced by adding a UV stabilizer to PC resin, and a reinforcing layer laminated on at least one surface of the base layer and produced by adding a UV stabilizer in an amount less than that of the base layer to PC resin. can be manufactured including That is, the base layer 110 may be manufactured by stacking PC resins containing different UV stabilizers.

Here, the UV stabilizer may be at least any one or more of benzophenone, benzotriazole, oxanilide, and benzoate described above.

For example, the base layer may be prepared by containing 0.5 to 1.5w% of the UV stabilizer relative to the total weight of the base layer, and the reinforcing layer may contain the UV stabilizer in an amount of 2.5 to 3.5w% relative to the total weight of the reinforcing layer. It can be manufactured by containing

In addition, the coating layer 140 is made of a coating solution prepared by chemically bonding silica to the epoxy resin described above.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto. It is clear that the transformation or improvement is possible by the person.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will become apparent from the appended claims.

100: smart plastic glazing 110: base layer
120: PDLC film 130: adhesive layer
140: coating layer 150: release film
211: adhesive dispensing device 212: storage tank
213: discharge pump 214: recovery tray
215: recovery pump 216: PDLC film supply roller
221: first roller 222: second roller
223: third roller 230: curing device
231: coating liquid discharge device 232: coating knife
233: pre-curing device 234: roller
235: curing device 236: release film supply roller

Claims (22)

a base layer made of PC (polycarbonate) resin;
a polymer-dispersed liquid crystal (PDLC) film laminated on the base layer; and
Including; a coating layer laminated on the PDLC film;
The base layer is
A base layer prepared by adding a UV stabilizer to PC resin; and
a reinforcing layer laminated on at least one surface of the base layer and prepared by adding a UV stabilizer in an amount less than that of the base layer to the PC resin;
The UV stabilizer,
Smart plastic glazing, characterized in that at least one of benzophenone, benzotriazole, oxanilide, and benzoate is used.
delete According to claim 1,
The base layer is prepared by containing 0.5 to 1.5w% of the UV stabilizer relative to the total weight of the base layer,
The reinforcing layer is smart plastic glazing, characterized in that the UV stabilizer is produced by containing 2.5 to 3.5w% of the total weight of the reinforcing layer.
According to claim 1,
The coating layer is
Smart plastic glazing, characterized in that it is made of a coating solution produced by chemically bonding silica to an epoxy resin.
A substrate layer supply step of supplying a substrate layer made of PC (polycarbonate) resin containing a UV stabilizer;
an adhesive supply step of applying an adhesive to one surface of the base layer;
a PDLC film supply step of seating a polymer-dispersed liquid crystal (PDLC) film on the upper side of the adhesive applied to the base layer; and
A PDLC film attachment step of attaching to the base layer by pressing the supplied PDLC film;
The base layer supply step,
A base layer production step of mixing a UV stabilizer with a PC resin to produce a base layer;
A reinforcing layer manufacturing step of mixing a PC resin with a UV stabilizer in a smaller amount than the base layer to produce a reinforcing layer; and
Including; a base layer manufacturing step of manufacturing the base layer by laminating the reinforcing layer on at least one surface of the base layer;
The UV stabilizer,
A method of manufacturing a smart plastic glazing, characterized in that at least one of benzophenone, benzotriazole, oxanilide, and benzoate is used.
6. The method of claim 5,
The base layer supply step,
Prepare the base layer by mixing 0.5 to 1.5w% of UV stabilizer with PC resin based on the total weight,
A method of manufacturing a smart plastic glazing, characterized in that the reinforcing layer is prepared by mixing 2.5 to 3.5w% of a UV stabilizer with respect to the total weight of PC resin.
7. The method of claim 6,
The base layer supply step,
a drying step of drying the prepared base layer at a temperature of 60 to 100° C. for 80 to 140 minutes;
Method of manufacturing smart plastic glazing, characterized in that it further comprises.
6. The method of claim 5,
The step of attaching the PDLC film,
a PDLC film pressing step in which a plurality of rollers press the PDLC film; and
an adhesive curing step of curing the adhesive by irradiating UV to the PDLC film;
A method of manufacturing a smart plastic glazing comprising a.
8. The method of claim 7,
The step of pressing the PDLC film,
a first moving step of removing air bubbles contained by moving the applied adhesive by pressing with a first roller in a first direction;
a second moving step of adjusting the thickness by moving the adhesive moved in the first direction in a second direction by pressing with a second roller; and
A flattening step of flattening the adhesive by pressing with a third roller;
A method of manufacturing a smart plastic glazing comprising a.
10. The method of claim 9,
The first moving step is
A method of manufacturing a smart plastic glazing, characterized in that the first roller is provided as a convex roller whose diameter increases toward the center, and moves the applied adhesive to the outside.
11. The method of claim 10,
The first moving step is
A method of manufacturing a smart plastic glazing, characterized in that the deviation of the outer diameter with respect to the central diameter of the first roller is varied and used to correspond to the thickness of the adhesive layer.
10. The method of claim 9,
The second moving step is
The method of manufacturing a smart plastic glazing, characterized in that the second roller is provided as a roller of a concave shape whose diameter becomes smaller toward the center, and the adhesive moved outward is moved inward.
10. The method of claim 9,
The planarization step is
The third roller is made of a silicone material having a hardness of 60 to 80 and a smooth roller having the same diameter is provided, and the adhesive is flattened.
6. The method of claim 5,
a release film supply step of supplying a release film to be laminated on the PDLC film;
a coating liquid application step of applying a coating liquid to one surface of the supplied release film so as to form a coating layer between the PDLC film and the release film; and
a coating layer forming step of forming a coating layer while attaching the release film to the PDLC film by pressing the release film coated with the coating solution;
A method of manufacturing a smart plastic glazing further comprising a.
15. The method of claim 14,
The coating liquid application step,
a coating solution discharging step of discharging the coating solution on one surface of the release film through a coating solution discharging device in which the coating solution is stored;
a planarization step of flattening the coating solution discharged on one surface of the release film through a coating knife to have a predetermined thickness; and
A pre-curing step of preliminarily curing the coating solution spread to a certain thickness so that it does not flow down;
A method of manufacturing a smart plastic glazing comprising a.
15. The method of claim 14,
The coating layer forming step,
a release film pressing step in which a roller presses the release film; and
A coating layer curing step of curing the coating solution by irradiating UV to the release film;
A method of manufacturing a smart plastic glazing comprising a.
15. The method of claim 14,
The coating liquid application step,
A method of manufacturing a smart plastic glazing, characterized in that the organic-inorganic hybrid compound is applied as a coating solution.
18. The method of claim 17,
The coating liquid application step,
A method of manufacturing smart plastic glazing, characterized in that the coating solution prepared by chemically bonding silica to an epoxy resin is applied.
15. The method of claim 14,
The release film supply step,
Method of manufacturing a smart plastic glazing, characterized in that supplying a fluorine release film so that it can be easily peeled off with respect to the adhesive surface with the coating layer.
15. The method of claim 14,
The release film supply step additionally supplies a release film to be laminated on the other surface of the base layer,
In the coating solution application step, a coating solution is applied to one surface of the supplied release film so that a coating layer is additionally formed between the base layer and the release film,
A method of manufacturing a smart plastic glazing, characterized in that the coating layer is formed on both sides of the base layer.
6. The method of claim 5,
The adhesive supply step is,
A method of manufacturing a smart plastic glazing, characterized in that a predetermined amount of adhesive is supplied from a storage tank in which the adhesive is stored to a discharge device for applying the adhesive to the surface of the base layer through a discharge pump.
22. The method of claim 21,
an adhesive recovery step of recovering the adhesive from the recovery tray for storing the adhesive flowing down from the base layer to the storage tank through a recovery pump;
Manufacturing method of smart plastic glazing, characterized in that it further comprises.

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