KR20220143302A - Preparation method of decoration sheet with 3D hidden effect - Google Patents

Abstract

The present invention relates to a method for manufacturing a decoration sheet having a three-dimensional hidden effect. According to the present invention, a polymer dispersed liquid crystal (PDLC) film has a smooth surface and is difficult to adhere to other materials. After a special primer is applied on a PDLC film to a thickness of 3 μm or less and semi-cured to form a viscous primer layer, a UV pattern layer (including a UV nanopattern layer and a micro lens layer) is formed on the semi-cured primer layer and then completely cured, and accordingly, the adhesion between the PDLC film and the UV pattern layer is improved. Thus, the PDLC film can be usefully applied to a decoration film.

Description

Manufacturing method of a three-dimensional hidden effect decoration sheet {Preparation method of decoration sheet with 3D hidden effect}

The present invention relates to a decoration sheet, and more particularly, to a method of manufacturing a three-dimensional hidden effect decoration sheet that can hide and reveal the three-dimensional effect of a three-dimensional design according to the application of power through a PDLC film.

In general, furniture, electronic products, and building materials are attached with decoration sheets printed with various patterns for interior purposes, and are used in various fields such as lapping processing, glass windows, and surface finishing of various electronic products. .

For example, in an electronic device using glass, interest in effects such as the formation of various appearance aesthetics that can be realized through glass is increasing. In particular, technology development regarding a glass decoration film or decoration sheet (which is also referred to as a 'decoration film or decorative sheet') is being actively developed. For example, when a decoration sheet is attached to glass, a metallic texture or a three-dimensional effect can be imparted through the exterior of the electronic device. In particular, the mobile and automotive design fields are increasingly demanding designs that realize dynamic and dramatic effects. Therefore, there is a need for the production of a new decoration sheet that improves the dynamic and three-dimensional properties.

On the other hand, conventional three-dimensional film printing (3D film printing) uses a special lens such as a lens or lenticular that can produce a three-dimensional effect on the front of PP or PET film, and then performs offset printing or gravure printing of a 3D effect pattern on the back side. It is a film processing method that creates a three-dimensional effect on a flat surface. However, in general, a 3D sheet converts a 2D image into a 3D image to implement only a 3D image, so the entire area of the image is always visible, so it is monotonous, and various contents cannot be implemented.

Republic of Korea Patent Publication No. 10-2008-0105704

The present invention is to solve the above problems, and by applying a polymer dispersed liquid crystal (PDLC) film, a three-dimensional hidden effect decoration sheet that can hide and reveal the three-dimensional effect of a three-dimensional design according to the application of power through the PDLC film To provide a manufacturing method of

One aspect of the present invention for achieving the above object provides a method of manufacturing a three-dimensional hidden effect decoration sheet. The manufacturing method of the three-dimensional hidden effect decoration sheet according to the present invention comprises the steps of forming a special primer layer on both sides of a polymer dispersed liquid crystal (PDLC) film (S110); forming a UV nanopattern layer on the upper special primer layer (S120); forming a color layer in the recesses in the UV nanopattern layer (S130); forming a microlens layer on the lower special primer layer (S140); forming a deposition layer on the micro lens layer (S150); and forming a shielding printing layer on the deposition layer to prepare a three-dimensional hidden effect decoration sheet (S160).

The special primer layer may include 15 to 35 parts by weight of methyl-isobutyl-ketone having the chemical formula CH ₃ COC ₄ H ₉ , 15 to 35 parts by weight of toluene, and 0.1 to 1 parts by weight of ethanol, based on 100 parts by weight of the total primer. .

The special primer layer has a coating film thickness of 3 μm or less, and can be semi-cured through UV irradiation of 450 to 550 mJ.

After the UV nanopattern layer is formed, it is completely cured through UV irradiation of 650 to 750 mJ to form a combination of a polymer dispersed liquid crystal (PDLC) film, a primer layer, and a UV nanopattern layer.

After the micro lens layer is formed, it is completely cured through UV irradiation of 650 to 750 mJ to form a polymer dispersed liquid crystal (PDLC) film, a primer layer, and a combination of the micro lens layer.

After the step of manufacturing the three-dimensional hidden effect decoration sheet (S160), it may further include the step of cutting the manufactured decoration sheet (S170).

In addition, another aspect of the present invention provides a three-dimensional hidden effect decoration sheet prepared by the above manufacturing method. The three-dimensional hidden effect decoration sheet includes a polymer dispersed liquid crystal (PDLC) film; an upper special primer layer, a UV nanopattern layer, and a color layer sequentially formed on the polymer dispersed liquid crystal (PDLC) film; The polymer dispersed liquid crystal (PDLC) film may include a lower special primer layer, a micro lens layer, a deposition layer, and a shielding print layer sequentially formed under the film.

The special primer layer may include 15 to 35 parts by weight of methyl-isobutyl-ketone having the chemical formula CH ₃ COC ₄ H ₉ , 15 to 35 parts by weight of toluene, and 0.1 to 1 parts by weight of ethanol, based on 100 parts by weight of the total primer. .

The special primer layer may have a coating film thickness of 3 μm or less.

According to the present invention, the polymer dispersed liquid crystal (PDLC) film has a smooth surface, so it is difficult to attach to other materials. After applying a special primer to the polymer dispersed liquid crystal (PDLC) film to a thickness of 3 μm or less, semi-curing the viscous primer After forming the layer, a UV pattern layer (including a UV nanopattern layer and a micro lens layer) is formed on the semi-cured primer layer and then fully cured to increase the adhesion between the polymer dispersed liquid crystal (PDLC) film and the UV pattern layer. By improving, a polymer dispersed liquid crystal (PDLC) film can be usefully applied to the decoration film.

The decoration sheet prepared according to the present invention forms a polymer dispersed liquid crystal (PDLC) film between the design printing area including the UV nanopattern layer and the color layer and the three-dimensional effect area including the micro lens layer, depending on whether or not power is applied. As the transparency of the polymer dispersed liquid crystal film changes, it is possible to produce more diverse effects by hiding or showing the three-dimensional effect generated by the microlens layer.

1 is a flowchart illustrating a method of manufacturing a three-dimensional hidden effect decoration sheet according to an embodiment of the present invention.
2 to 7 are cross-sectional views for explaining detailed steps of a method of manufacturing a three-dimensional hidden effect decoration sheet according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This example is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of elements in the drawings are exaggerated to emphasize a clearer description.

The configuration of the invention for clarifying the solution of the problem to be solved by the present invention will be described in detail with reference to the accompanying drawings based on a preferred embodiment of the present invention, but the same in assigning reference numbers to the components of the drawings For the components, even if they are on different drawings, the same reference numbers are given, and it is noted in advance that the components of other drawings can be cited when necessary in the description of the drawings.

One aspect of the present invention provides a method of manufacturing a three-dimensional hidden effect decoration sheet.

1 is a flowchart illustrating a method of manufacturing a three-dimensional hidden effect decoration sheet according to an embodiment of the present invention, and FIGS. 2 to 7 are detailed steps of a manufacturing method of a three-dimensional hidden effect decoration sheet according to an embodiment of the present invention. These are cross-sectional views for explanation.

1, the manufacturing method of the three-dimensional hidden effect decoration sheet according to the present invention is

Forming a special primer layer on both sides of a polymer dispersed liquid crystal (PDLC) film (S110);

forming a UV nanopattern layer on the upper special primer layer (S120);

forming a color layer in the recesses in the UV nanopattern layer (S130);

forming a microlens layer on the lower special primer layer (S140);

forming a deposition layer on the micro lens layer (S150); and

Forming a shielding printing layer on the deposition layer may include the step of manufacturing a three-dimensional hidden effect decoration sheet (S160).

Hereinafter, the manufacturing method of the three-dimensional hidden effect decoration sheet according to the present invention will be described in detail step by step with reference to FIGS. 2 to 7 .

First, step S110 is a step of forming special primer layers 110 and 120 on both sides of the polymer dispersed liquid crystal (PDLC) film 100 .

The polymer dispersed liquid crystal (PDLC) film 100 is to exhibit a three-dimensional stereoscopic hidden effect, which is one of the characteristics of the present invention, and is located between the UV nanopattern layer 130 and the micro lens layer 150 to be described later. can

The polymer dispersed liquid crystal (PDLC) film 100 has a structure in which micron-sized liquid crystal particles are dispersed in a polymer matrix, and controls light transmittance by a difference in refractive index between the liquid crystal particles and the polymer by an external voltage. Specifically, in the off-state, irregularly arranged liquid crystal particles appear opaque because absorbed light is scattered due to a difference in refractive index with the polymer matrix, but when power is applied, the liquid crystal particles are aligned regularly. Since it operates on the principle of becoming transparent by inducing the matching of the refractive index, the polymer dispersed liquid crystal film 100 is placed between the UV nanopattern layer 130 representing the design pattern and the microlens layer 150 representing the stereoscopic effect. Depending on the application of , the hidden effect of the three-dimensional effect can be exhibited.

However, since the polymer dispersed liquid crystal (PDLC) film 100 has a smooth surface, it is difficult to attach it to other materials with a general adhesive. Therefore, a special method for improving adhesion with the polymer dispersed liquid crystal (PDLC) film is required.

Accordingly, the present inventors have studied to improve the adhesion with the polymer dispersed liquid crystal (PDLC) film, and as a result, a special primer layer is thinly applied and cured together with a UV pattern to increase the thickness of the polymer dispersed liquid crystal (PDLC) without a significant increase. It has been found that UV patterns can be applied to films.

Specifically, in step S110 , as shown in FIG. 2 , special primer layers 110 and 120 may be formed by applying a special primer to both sides of the polymer dispersed liquid crystal (PDLC) film 100 .

In this case, the special primer may include methyl-isobutyl-ketone having the chemical formula CH ₃ COC ₄ H ₉ , toluene and ethanol, and the content thereof is CH ₃ COC ₄ H ₉ with respect to 100 parts by weight of the total primer. 15 to 35 parts by weight of phosphorus methyl-isobutyl-ketone, 15 to 35 parts by weight of toluene, and 0.1 to 1 parts by weight of ethanol.

The special primer layers 110 and 120 preferably have a coating film thickness of 3 μm or less. If the thickness of the special primer layers 110 and 120 exceeds 3 μm, the 3D effect is halved because the focal length is changed according to the increase in thickness, and only the overall thickness of the film is increased to prevent wrinkles on curved surfaces when laminating on glass. It can be a factor in the occurrence of defects.

The special primer layers 110 and 120 are preferably semi-cured to form a viscous primer layer, which is fully cured together with the UV nanopattern layer 130 or the micro lens layer 150 to be formed later to form a polymer dispersed liquid crystal. (PDLC) The film-primer layer-UV nanopattern layer (or micro lens layer) is formed as a combined binder, so that the UV nanopattern layer (or micro lens layer) can be strongly attached to the polymer dispersed liquid crystal (PDLC) film.

The special primer layers 110 and 120 may be semi-cured through UV irradiation of 450 to 550 mJ.

Next, step S120 is a step of forming the UV nanopattern layer 130 on the upper special primer layer 110 . The UV nanopattern layer 130 may serve to represent a three-dimensional design pattern.

Specifically, after applying a transparent UV pattern molding paint to the semi-cured and viscous upper special primer layer 110, the UV printing molding method is processed through a super precision machine pattern, various pattern shapes By forming a UV molding to have a, as shown in FIG. 3, it is possible to form the UV nanopattern layer 130. In addition, any UV pattern shape obvious to those skilled in the art may be applied.

The UV printing method uses a dedicated liquid ink that has the property of instant curing, i.e., drying immediately upon exposure to UV light. durability can be guaranteed.

On the other hand, the UV nanopattern layer 130 may be formed through a gravure printing process using a gravure roll having an intaglio groove of a predetermined design or shape on the surface, even if it is not a pattern using a printing method of the UV molding method. At this time, the pattern layer may be formed by filling the intaglio groove with the composition for forming the UV pattern layer and then removing the ink on the flat surface except for the shape. When the UV nanopattern layer is formed in this way, it is possible to express various designs, thereby improving aesthetics.

The paint for UV nanopattern molding may include a binder material. The binder material is an epoxy-based resin, an acrylic resin, a polyolefin-based resin, a polyamide-based resin, a polyester-based resin, a polyvinyl chloride-based resin, a polyvinyl acetate-based resin, a petroleum-based resin, a phenol-based resin, a polystyrene-based resin, and At least one of urethane-based resins may be included. Specifically, the gravure printing process may be performed by filling the pattern layer-forming composition including the binder material in the gravure roll having intaglio grooves formed on the surface. Accordingly, the pattern layer can be directly formed without a separate curing process later, thereby simplifying the process and reducing the process time.

After forming the UV nanopattern layer 130 on the semi-cured upper special primer layer 110, it is completely cured to form a combination of a polymer dispersed liquid crystal (PDLC) film, a special primer layer, and a UV nanopattern layer. have. The complete curing may be performed through UV irradiation of 650 ~ 750 mJ.

Next, step S130 is a step of forming a color layer in the recesses in the UV nanopattern layer.

Specifically, as shown in FIG. 4 , a color layer 140 such as a subject picture, a photograph of a product, and various patterns may be formed in a recess in the UV nano-pattern layer 130 by filling ink. .

The color layer 140 may be printed in a primary color 4 (C, M, Y, K) process or spot colors.

Next, step S140 is a step of forming the micro lens layer 150 on the lower special primer layer 120 .

The micro lens layer 150 serves to represent a planar 2D image as a three-dimensional stereoscopic effect by utilizing the optical illusion effect principle by binocular disparity. Specifically, the UV nanopattern layer 130 and If the micro lens layer 150 is used at the bottom of the design pattern formed on the color layer 140, a three-dimensional stereoscopic effect of the corresponding image can be obtained by using the blocking effect of some images and the selective light advancing effect.

At this time, in order to produce a 3D stereoscopic effect, the pattern design at the top and the lens design at the bottom must match, and the focal length value that creates a stereoscopic effect through the setting of the middle polymer dispersed liquid crystal (PDLC) film and the bottom of the top must match.

For example, when arranging a plurality of convex micro lenses in a plurality of hemispherical or arc shapes in the micro lens layer 150, if the distance from the center point of the micro lens to the center point of the adjacent micro lens is 25 μm, the UV When the distance from the center point of the three-dimensional pattern cell printed on the nanopattern layer 130 to the center point of the adjacent pattern cell is 25 μm and the micro lens is matched, the pattern composed of the pattern cells is diffused according to the angle at which the microlens is viewed with the naked eye. To obtain a three-dimensional effect contrasting with the color layer 140 that can be observed clearly and precisely, a three-dimensional effect such as a figure or pattern floating in a place deeper than the depth of the decoration film or higher than the surface of the micro lens layer 150 it can be

On the other hand, in order to make the thickness of the sheet slim, the size of the micro lens pie is set to 100 to 130 μm, and the distance between adjacent lens center points is preferably in the range of 110 to 140 μm.

The micro lens layer 150 is formed by applying a transparent UV pattern molding paint to the semi-cured and viscous lower special primer layer 120 and then forming it through a UV molding process, as shown in FIG. 5 , a plurality of It can be molded into a hemispherical or arc-shaped convex plurality of microlenses.

The material of the micro lens layer 150 may be formed of ultraviolet resin, polyethylene terephthalate, polycarbonate, epoxy, or acrylic resin.

After the microlens layer 150 is formed on the semi-cured primer layer 120 , it may be completely cured to form a combination of a polymer dispersed liquid crystal (PDLC) film, a primer layer, and a microlens layer. The complete curing may be performed through UV irradiation of 650 ~ 750 mJ.

Next, step S150 is a step of forming the deposition layer 160 on the micro lens layer 150 .

The deposition layer 160 is performed to protect the lens molding of the microlens layer 150 and to make the three-dimensional effect of the microlens appear clearly because the microlens is transparent. As shown in FIG. 6 , the deposition layer 160 may be formed in the form of an inorganic thin film on the microlens layer 150 using a deposition method commonly used in the art, for example, a physical or chemical deposition method.

In the physical vapor deposition method, when an oxide semiconductor or GaAs is deposited on a substrate, compounds are melted to form a solid target, which is then evaporated by heat or electron beam and deposited on the substrate. At this time, the raw material is sent in a gaseous state through heat, laser, electron beam, etc., and is changed to a solid state when the blown gaseous raw material touches the substrate.

The chemical vapor deposition method is an industrial method for making a thin film such as silicon on a substrate by using a chemical reaction in a manufacturing process such as IC. It is used to make silicon oxide film, silicon nitrogen film, and amorphous silicon thin film. When energy is applied to a gas containing chemical substances by heat or light, or when plasma is generated at a high frequency, the raw material is radicalized and the reactivity is greatly increased, so that it is adsorbed and deposited on the substrate.

Next, step S160 is a step of manufacturing a three-dimensional hidden effect decoration sheet by forming a shielding printing layer 170 on the deposition layer 160 .

The shielding printing layer 170 performs a function of blocking light transmission, and can be implemented by printing a dark color, and when looking down from the upper side of the decoration sheet according to the present invention, the lower side of the shielding printing layer 170 is transparent make sure it doesn't happen The shielding printing layer 170 may be, for example, a silk printing layer formed by a silk screen printing method, and may be formed on the back surface of the deposition layer 160 as shown in FIG. 7 .

The three-dimensional hidden effect decoration sheet formed by the above method may further include the step of cutting (S170).

The cutting step corresponds to the step of cutting the three-dimensional hidden effect decoration sheet using equipment such as a laser according to the shape and size of the adherend after the step S160 is completed.

In addition, another aspect of the present invention provides a three-dimensional hidden effect decoration sheet prepared by the above manufacturing method.

As shown in FIG. 7, the three-dimensional hidden effect decoration sheet includes a polymer dispersed liquid crystal (PDLC) film 100; a design printing area including an upper special primer layer 110, the UV nanopattern layer 130, and a color layer 140 sequentially formed on the polymer dispersed liquid crystal (PDLC) film 100; A three-dimensional effect region including a lower special primer layer 120 , a micro lens layer 150 , a deposition layer 160 , and a shielding printing layer 170 sequentially formed under the polymer dispersed liquid crystal (PDLC) film 100 . includes

At this time, the special primer layers 110 and 120 are 15 to 35 parts by weight of methyl-isobutyl-ketone having the chemical formula CH ₃ COC ₄ H ₉ , 15 to 35 parts by weight of toluene, and 0.1 to 0.1 parts by weight of ethanol, based on 100 parts by weight of the total primer. It may contain 1 part by weight.

The primer layer preferably has a coating film thickness of 3 μm or less.

The decoration sheet manufactured by the above manufacturing method has a polymer dispersed liquid crystal (PDLC) film 100 formed on the micro lens layer that exhibits a three-dimensional effect of a three-dimensional design, and when power is applied, the polymer dispersed liquid crystal (PDLC) The liquid crystal particles in the film are oriented regularly and become transparent by inducing the matching of the refractive index, so that the light from the light source passes through the polymer dispersed liquid crystal (PDLC) film to reach the micro lens layer, and thus some images are A three-dimensional effect of the image can be obtained by using the blocking effect and the selective light advance effect.

However, when power is not applied, the liquid crystal particles in the polymer dispersed liquid crystal (PDLC) film 100 are irregularly aligned and are opaque, and thus the polymer dispersed liquid crystal (PDLC) film 100 reflects light on the surface and Because it scatters, a stereoscopic hidden effect that obscures the 3D stereoscopic effect appears.

Therefore, when using the decoration sheet according to the present invention, it is possible to produce more various effects by hiding or showing the three-dimensional effect of the design depending on whether power is applied or not.

The above detailed description is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the written disclosure, and/or within the scope of skill or knowledge in the art. The written embodiment describes the best state for implementing the technical idea of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. Also, the appended claims should be construed as including other embodiments.

100: polymer dispersed liquid crystal (PDLC) film
110: upper special primer layer
120: lower special fryer layer
130: UV nanopattern layer
140: color layer
150: micro lens layer
160: deposition layer
170: shielding printing layer

Claims (9)

Forming a special primer layer on both sides of a polymer dispersed liquid crystal (PDLC) film (S110);
forming a UV nanopattern layer on the upper special primer layer (S120);
forming a color layer in the recesses in the UV nanopattern layer (S130);
forming a microlens layer on the lower special primer layer (S140);
forming a deposition layer on the micro lens layer (S150); and
A method of manufacturing a three-dimensional hidden effect decoration sheet, comprising the step (S160) of manufacturing a three-dimensional hidden effect decoration sheet by forming a shielding printing layer on the deposition layer. According to claim 1,
The special primer layer comprises 15 to 35 parts by weight of methyl-isobutyl-ketone having the chemical formula CH ₃ COC ₄ H ₉ , 15 to 35 parts by weight of toluene, and 0.1 to 1 parts by weight of ethanol, based on 100 parts by weight of the total primer A method of manufacturing a three-dimensional hidden effect decoration sheet. According to claim 1,
The special primer layer has a coating film thickness of 3 μm or less, and is semi-cured through UV irradiation of 450 to 550 mJ. Method for producing a three-dimensional hidden effect decoration sheet. According to claim 1,
After forming the UV nanopattern layer, it is completely cured through UV irradiation of 650 to 750 mJ to form a combination of a polymer dispersed liquid crystal (PDLC) film, a primer layer, and a UV nanopattern layer. manufacturing method. According to claim 1,
After the micro lens layer is formed, it is completely cured through UV irradiation of 650 to 750 mJ to form a combination of a polymer dispersed liquid crystal (PDLC) film, a primer layer, and a micro lens layer. Method for producing a three-dimensional hidden effect decoration sheet . According to claim 1,
After the step (S160) of manufacturing the three-dimensional hidden effect decoration sheet, the manufacturing method of the three-dimensional hidden effect decoration sheet, characterized in that it further comprises the step (S170) of cutting the manufactured decoration sheet. A three-dimensional hidden effect decoration sheet prepared by any one of claims 1 to 6,
a polymer dispersed liquid crystal (PDLC) film;
an upper special primer layer, a UV nanopattern layer, and a color layer sequentially formed on the polymer dispersed liquid crystal (PDLC) film;
A three-dimensional hidden effect decoration sheet comprising a lower special primer layer, a micro lens layer, a deposition layer and a shielding printing layer sequentially formed under the polymer dispersed liquid crystal (PDLC) film. 8. The method of claim 7,
The special primer layer comprises 15 to 35 parts by weight of methyl-isobutyl-ketone having the chemical formula CH ₃ COC ₄ H ₉ , 15 to 35 parts by weight of toluene, and 0.1 to 1 parts by weight of ethanol, based on 100 parts by weight of the total primer A three-dimensional hidden effect decoration sheet. 8. The method of claim 7,
The three-dimensional hidden effect decoration sheet, characterized in that the special primer layer has a coating film thickness of 3 μm or less.

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