KR20020003546A - Decorative Films for Glass-Paned Window - Google Patents

Abstract

The present invention relates to a decorative film for window glass, which is excellent in privacy protection, light shielding properties, and decorative effects. The decorative film comprises a colored layer comprising a transparent substrate and an ink containing an optical coherent pigment. The colored layer is provided on one side of the substrate.

Description

Decorative Films for Window Glass {Decorative Films for Glass-Paned Window}

Conventionally, for the purpose of privacy protection and shading, it has been widely practiced to coat transparent window glass with a specific polarizing film so that the interior or the inside of a vehicle cannot be easily seen. As a polarizing film which coat | covers a window glass, For example, the film obtained by coating transparent base materials, such as a polyester film and a polyolefin film, with the ink containing the powder of metals, such as aluminum, titanium, and nickel; Films obtained by laminating metals such as aluminum, titanium and nickel on a substrate such as a polyolefin film; And films obtained by coating a substrate with an ink having high barrier properties. In such a polarizing film, when the inside is observed from the outside through the window glass coated with the polarizing film, only the gray or similar halftone window glass is seen, and the situation inside cannot be observed. This is simply because the brightness outside the window glass is reflected by the polarizing function of the film. Inside the window glass, the outside landscape can be seen similarly to the case where no polarizing film is used, and its view is not disturbed.

Prior art polarizing films are useful for privacy and light shielding as described above. However, as described above, the color observed externally when using the polarizing film of the prior art is black or gray, or a similar middle tone. Thus, there is still room to improve its appearance.

Although the purpose is not to improve the appearance of the polarizing film, Japanese Unexamined Patent Application No. 3-69397 discloses transparent doors, windows, and interior partitions without deteriorating see-through and shading properties. A decorative screen is described which can display different markings on both sides of the surface. As schematically shown in FIG. 1, a decorative screen is provided on a substrate 20 made of transparent plastic or glass with a printing layer 24 having several perspective-holes 25, and a printing layer 24. Has a surface pattern layer 21 and a back pattern layer 23, respectively, and has a structure in which the screen ink layer 22 is positioned between the two pattern layers. This decorative screen can be manufactured by manufacturing the transfer sheet which has the printing layer 24, forming several see-through holes 25, and then transferring a transfer sheet to one side of a base material. For example, if the decorative sheet is coated on the window glass, the opposite side can be seen through several through-holes 25 formed on the printed layer 24 on either side, and different patterns on each side can be seen. Can be. Therefore, it can be used for advertising and decoration purposes. However, in the case of this decorative screen, the transfer sheet must be manufactured as its precursor, and thus the production becomes complicated, and an increase in cost is inevitable. In addition, the printed pattern is not attractive because it depends on conventional printing techniques, and fine patterns cannot be printed.

In addition, Japanese Utility Model Registration No. 3041191 describes a removable sheet type advertisement display that can display advertisement contents on side window portions of moving bodies such as automobiles and trains without obstructing the field of view. As shown in FIG. 2, since the advertising display 31 covers the portion including the side window portion 35 of the moving body through the adhesive portion 34, the advertising display penetrates the sheet on the entire surface. It has a see-hole 32, and at the same time an advertisement display portion 33 (English letter portion in the drawing) is provided on the surface. The pattern of the advertisement display portion 33 can be clearly seen on the outside of the vehicle body, while at the same time providing the see-hole 32 with a size and distance sufficient to allow a view of the exterior landscape from the inside of the vehicle body. However, in the case of such an advertisement display, since the through-hole occupies the main part of the sheet, the amount of adhesive applied to the back adhesive part is small, and a sufficiently strong adhesive force cannot be obtained. In addition, during coating of the advertising display on the window glass, dust accumulates in the pressed-on adhesive portion by the pressure applied during the covering of the see-hole and the sheet, thereby degrading adhesion and durability. Although not described in the specification, it is understood that the advertising display is manufactured by using a combination of the transfer method and the perforation method, similar to the decorative screen described above with reference to FIG. 1. Therefore, there is a risk that the production becomes complicated, the cost increases, and the additional problem of not being able to print fine patterns.

Summary of the Invention

It is an object of the present invention to solve one or more of the above problems of decorative films for window glass of the prior art.

Another object of the present invention is to provide a decorative film for window glass which is excellent in at least one or more of privacy, light-shielding properties and decorative effects.

Another object of the present invention is to provide a decorative film for window glass that can be easily manufactured, has sufficient adhesive force to the window glass, and / or can provide an attractive fine decorative pattern.

According to one or more aspects of the present invention, the decorative film comprises a colored layer comprising a transparent substrate and an ink containing an optically coherent pigment. The colored layer is provided on one side of the substrate.

According to a preferred embodiment, the decorative film of the present invention includes not only a transparent substrate but also a colored layer and a transparent layer which are sequentially laminated on one side of the transparent substrate. An adhesive layer is provided on the other side of the substrate, which is the opposite side of the colored layer. The adhesive layer may be colored but not necessarily, and the surface of the adhesive is preferably protected by a release liner such as a release paper.

The decorative film of the present invention can also be used in a form in which the structure is modified according to its use and other factors. The decorative film of the present invention may have another additional layer in addition to the substrate and the colored layer which are essential for construction, and an adhesive layer and a transparent layer are preferably used. Each layer may generally be used in the form of a single layer, but in some cases, may be used as a multilayer of two or more layers.

In the practice of the present invention, the transparent substrate is not particularly limited as long as there is sufficient self-supporting property to support the colored layer, but a plastic film is preferred. Suitable plastic films include, for example, polyester films, polyethylene films, polycarbonate films, vinyl chloride films, acrylic films, polyurethane films, polyolefin films, and vinylidene fluoride films, but are not limited to these. no. The thickness of these films can vary widely depending on the use of the decorative film of the present invention, but is generally about 30 to 150 μm. Such substrates are preferably transparent, but may also be translucent or slightly colored as long as they are desired or do not adversely affect the effects of the present invention.

The colored layer provided on one side of the transparent substrate is made of an ink containing an optically coherent pigment that can be developed by the interference of light. The ink used in the present invention can be printed using conventional printing methods such as screen printing and gravure printing. Such printing may be monochrome printing or multicolor printing. Pigments that can be developed by the interference of light can give the ink a unique coloring effect in the ink, unlike inks with a solid color. Therefore, the appearance and decorative effect of the finally obtained decorative film can be remarkably improved.

The ink constituting the colored layer is preferably a polarized pearl ink. The term "polarized pearl ink" as used in the specification of the present application means an ink containing an optically coherent pigment having the action / effect that the color and the light change with the viewing angle as a result of the interference between the reflected light and the transmitted light. This ink preferably contains titanium dioxide coated mica flakes, iron oxide coated mica flakes, scaly mica pigments such as bismuth trichloride, and scaly flakes such as scaly glass. Although the sizes of these optically coherent pigments vary widely, it is generally preferred that the average particle diameter be about 5 to 130 μm.

The amount of pigment in the polarizing pearl ink can vary widely depending on the desired color development effect, but in general, it is preferably more than 1% by weight to less than 40% by weight, more preferably about 3 to about 30% by weight. Most preferably, the pigment content is about 5 to about 15% by weight.

Although the film thickness of a colored layer varies widely, it is preferable that it is about 2 to about 20 micrometers.

The transparent layer provided on the top layer of the decorative film preferably has weather resistance and heat resistance in addition to transparency itself, which is an essential characteristic, in view of the transparent layer being used as a protective film. Preferably, the transparent layer may be formed by selecting a suitable resin from a variety of resins satisfying its properties. It is preferable that a transparent layer has favorable adhesiveness with the colored layer which is the base part. Suitable resins used to prepare the transparent layer include, for example, polyester resins, polyethylene resins, polycarbonate resins, vinyl chloride resins, acrylic resins, polyurethane resins, polyolefin resins and vinylidene fluoride resins. However, it is not limited to these. The film thickness of the transparent layer can vary widely depending on the desired effect, but is preferably about 5 to about 100 μm, more preferably about 20 to about 75 μm. In addition, as an effect of adding a transparent layer, it can be expected to provide gloss to the surface of the decorative film.

In the decorative film for window glass of the present invention, when applied to the window glass, it is preferable to provide an adhesive layer supporting the film on the lowermost side of the substrate to facilitate handling and coating of the film. Suitable adhesive layers are adhesive layers with a release liner. Such adhesive layers are readily available commercially. By using such an adhesive layer having a release liner together with the decorative film for window glass of the present invention, when the decorative film is coated on the window glass of homes and shops and the window glass of automobiles, the general polarizing film and the anti-scattering film are coated. The decorative film can be coated by the same operation as that of the case.

The present invention relates to a decorative film for window glass, and more particularly to a decorative film for window glass which is particularly excellent in privacy protection, light shielding properties and decorative effects. The decorative film of the present invention can exhibit excellent effects when coated on transparent window glass of buildings such as houses and buildings, and transparent window glass of vehicles such as cars and trains.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an example of a transparent display screen of the prior art.

2 is a front view illustrating an example of an advertisement display for a moving vehicle of the prior art.

3 is a cross-sectional view showing one preferred embodiment of a decorative film for window glass according to the present invention.

Referring to FIG. 3, the decorative film 10 includes a colored layer 2 made of polarized pearl ink and provided on one side of the transparent film substrate 1. On the colored layer 2, a transparent layer 3 is provided for the purpose of protecting the colored layer 2 and providing gloss. An adhesive layer 4 having a release liner (not shown) is provided on the opposite side of the colored layer 2 of the film substrate 1. This decorative film is especially designed for use on window glass of automobiles. When coating on the window glass, the decorative film may be coated on the outside of the window glass through the adhesive layer after removing the release liner.

The decorative film shown in the figure was manufactured by the following method.

Example 1

A vinyl chloride film for glass (available under the trade name "WA581" from Sumitomo 3M Co., Ltd.) was prepared for use as a substrate. The size of the film was 18 cm wide x 120 cm long x thickness 80 m. On one surface of the vinyl chloride film contains three color (green, red and yellow) polarized pearl inks (scaled titanium dioxide coated mica flakes at a concentration of 5% by weight each) and the average particle diameter of the mica flakes is from about 0 to 50 micrometers and silk-screen printing of the flower pattern was performed using Merck & Co. (available as "Iriodin Series" from Merck & Co.). The thickness of the colored layer containing a flower pattern was about 2-20 micrometers. As the inventors wished, it was possible to print a minute portion of the flower pattern. After completion of the printing operation, a transparent coating composition of polyester resin (commercially available under the trade name " GA3 " in Sumitomo 3M) was used for the purpose of protecting the colored layer and improving the glossiness of the film surface. Coated with and dried. On the back side of the vinyl chloride film, an acrylic adhesive available from Soken Kagaku Co., Ltd. as part number "1429F-2" was laminated to a thickness of about 30 mu m.

The decorative film prepared as described above was coated on the outside of the rear glass of the vehicle using a squeegee. The decorative film was observed from the outside of the car under sunlight. As a result, it was observed that the excellent pearl luster was vividly in the flower pattern printed in the previous step. Then, the decorative film was observed inside the vehicle under the same sunlight. As a result, it was impossible to see the flower pattern observed previously, and the outside landscape could be observed without any obstacles. The observer's field of view was not disturbed by the presence of the decorative film.

In addition, the above procedure was repeated except that a coating tape (commercially available under the trade name " SCPM3Y " from Sumitomo 3M Co., Ltd.) was laminated to the transparent layer instead of the acrylic adhesive layer laminated to the vinyl chloride film. The obtained film was coated on the inside of the rear glass of the automobile, and the flower pattern was observed in the same manner as described above. The same result was obtained.

Example 2

In this example, in order to test the effect of the amount of pigment (titanium dioxide coated scaled mica flakes) contained in the polarized pearl ink, the concentration of the pigment was 1, 10, 15, 30, 40 and 50% by weight, respectively. The same procedure as described in Example 1 was repeated except for the change. As a result, the color development effect was poor when the concentration was 1% by weight. When the concentration was 10 to 15% by weight, the same color development effects as those observed in Example 1 were obtained. When the concentration was 30% by weight, the color development effect was good but the transparency was slightly decreased. As the concentration was increased to 40% by weight, 50% by weight, and the like, the transparency decreased sharply.

As described above, the decorative film of the present invention is coated on transparent window glass of a structure where interior and exterior brightness are different, for example, a house and a building, and a transparent window glass of a vehicle such as a car and a train. If so, not only the internal situation is visible through the decorative film, but also the coloring patterns such as letters, patterns and designs can be seen with the coloring pattern appearing on the dark background of the window glass. On the other hand, when looking outside the window from inside or inside the car, not only the coloring pattern of the window glass is seen but also the exterior scenery can be seen without any obstacle. Therefore, the decorative film of this invention is useful for privacy protection and light shielding. In addition, window glass, which has not been actively used until now, can be used for advertisement display and display purposes. In particular, the ink containing the optical coherent pigment used in the present invention can provide an appearance having an excellent design and decorative effect, unlike inks with a conventional solid color. The decorative film of this invention can print a fine pattern by a simple technique, and is also excellent in the adhesive force to window glass.

Claims (16)

A decorative film for window glass, comprising a colored layer comprising a transparent substrate and an ink containing an optical coherent pigment, wherein the colored layer is provided on one side of the substrate. The decorative film of claim 1, wherein the ink is a polarized pearl ink. The decorative film according to claim 2, wherein the polarizing pearl ink contains a pigment, and the pigment is a scale flake pigment. The decorative film of claim 3, wherein the average particle diameter of the flakes is 5 to 130 μm. The decorative film of claim 4, wherein the content of the pigment in the polarizing pearl ink is greater than 1 wt% and less than 40 wt%. The decorative film of claim 2, wherein the polarizing pearl ink contains a pigment, and the pigment is at least one of scaled titanium dioxide coated mica flakes and iron oxide coated mica flakes. The decorative film of claim 2, wherein the polarizing pearl ink contains pigments selected from the group consisting of titanium dioxide coated mica flakes, iron oxide coated mica flakes and bismuth trichloride, scaled glass flakes, and combinations thereof. The decorative film of Claim 1 whose film thickness of the said colored layer is 1-20 micrometers. The transparent substrate according to claim 1, further comprising a transparent layer and an adhesive layer, wherein the colored layer and the transparent layer are sequentially laminated on one side of the transparent substrate, and the adhesive layer is the opposite surface of the colored layer. Decorative film provided on the other side. The decorative film according to claim 1, further comprising a transparent layer and an adhesive layer, wherein the colored layer, the transparent layer, and the adhesive layer are sequentially laminated on one side of the transparent substrate. The decorative film of claim 1, wherein the decorative film is used with a window glass of an automobile and adheres to a glass surface of the window glass. The decorative film of claim 11, wherein the window glass is an automotive window glass. Providing a decorative film according to claim 1, and Coating decorative film on glass surface How to decorate a glass surface comprising a. The method of claim 13, wherein the glass surface is the surface of window glass. The method of claim 13, wherein the glass surface is the surface of an automotive window glass. The method of claim 13, wherein the decorative film is provided to further include an adhesive layer on the other surface of the transparent substrate that is the opposite side of the colored layer, and the step of coating the decorative film decorates the glass surface using the adhesive layer. A method comprising adhering a film.