JP2003002690A - Privacy protecting window material and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing privacy protecting window material having both excellent privacy protectiveness and superior visibility in viewing from indoor to outdoor at low cost and efficiently. SOLUTION: This method for producing the privacy protecting window material is: after forming a pattern of a transparent substrate using at least a substance soluble in a solvent and forming a laminated body of a dark color layer and a bright color layer insoluble in the solvent, the pattern and the laminated body of the dark color layer and the bright color layer formed on the pattern are removed using the solvent. In a preferred embodiment, the dark color layer is formed by application or printing of a black or dark color coating material, metal deposition or plating. In another preferred embodiment, the bright color layer is formed by application or printing of a white or bright color coating material, mirror-surface finish by metal deposition or plating. In further another embodiment, the thickness of the dark color layer is from 100 to 5,000 angstrom and the thickness of the bright color layer is from 100 to 5,000 angstrom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a privacy protection window material which is particularly useful as a window material or the like in which privacy protection is required, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, for the purpose of protecting privacy and shading indoors, it is difficult to observe the inside of a transparent window material from the outside, so that a curtain or a white lace curtain is provided near the window material. , Providing blinds, depositing a semi-transparent metal film on the window material (mirror glass, etc.), roughening the surface of the window material (frosted glass, etc.), sealing the liquid crystal on the window material and electrically Techniques such as light control (light control glass, etc.) and processing of dark colors on window materials have been implemented.

However, in these techniques, the other side of the window material can be visually recognized to the same extent when observed from either side (indoor side or outdoor side) of the window material. Therefore, there is a problem that the indoor is observed from the outside as much as the outdoor is observed from the indoor except when the outdoor is extremely bright. In addition, it is difficult to observe the inside from the outside with the technique such as frosted glass that makes the surface of the window material rough,
Similarly, it is difficult to observe indoors and outdoors.

Conventionally, there has also been implemented a technique of printing a geometrical pattern or the like in two colors of a light color layer and a dark color layer by screen printing and punching holes so as to obtain a certain transmittance by punching. There is. However, there is a problem in that it is necessary to make holes one by one, and since the holes are made directly in the glass, the manufacturing efficiency is poor and it is technically difficult.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the various problems in the prior art and achieve the following objects. That is, an object of the present invention is to provide a privacy protection window material that is efficient and low cost, and is excellent in both privacy protection property and visibility when observing indoors and outdoors, and a manufacturing method thereof.

[0006]

Means for solving the above-mentioned problems are as follows. That is, <1> A pattern is formed on a transparent substrate using at least a solvent-soluble substance to form a laminate of a dark color layer and a light color layer which is insoluble in the solvent, and then the pattern is formed by the solvent. And a laminated body of a dark color layer and a light color layer formed on the pattern, the method is a method for manufacturing a privacy protection window material. <2> The dark layer is a black or dark-colored paint applied or printed,
The method for producing a privacy protection window material according to <1> above, which is formed by at least one of metal vapor deposition and plating.

<3> The light color layer is formed by applying or printing a white or light color paint, mirror finishing by metal deposition, and / or plating.
2> is a method for manufacturing a privacy protection window material. <4> Thickness of dark color layer (refers to the thickness of the dark color layer formed on the pattern. The same applies to the following in the present invention.)
Is 100 to 5000Å, and the thickness of the light color layer (refers to the thickness of the light color layer formed on the pattern. In the present invention, the same applies hereinafter) is 100 to 5000Å. The method for producing a privacy protection window material according to any one of <3>. <5> The method for producing a privacy protection window material according to any one of <1> to <4>, wherein the solvent is water. <6> The above, wherein the substance soluble in a solvent is a water-soluble resin
1> A method for manufacturing a privacy protection window material according to any one of <5>. <7> The method for producing a privacy protection window material according to <6>, wherein the water-soluble resin is polyvinyl alcohol.

<8> The pattern is a dot-like pattern, and the method for producing a privacy protection window material according to any one of <1> to <7> is formed by printing. <9> The method for producing a privacy protection window material according to any one of <1> to <8>, wherein the transparent substrate has a laminate of at least a dark color layer and a light color layer. It is a privacy protection window material. <10> The privacy protection window material according to <9>, wherein the light reflectance (%) in the light color layer is 3.0% or more higher than the light reflectance (%) in the dark color layer. <11> The above <9> used for a building or a window material for a car
Alternatively, the privacy protection window material according to <10>. <12> When used for a building or a window material for a car, the light color layer is arranged on the outdoor side and the dark color layer is arranged on the indoor side.
11> is a privacy protection window material.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. [Method for manufacturing privacy protection window material] In the method for manufacturing a privacy protection window material of the present invention, after forming a pattern on a transparent substrate to form a laminate of a dark color layer and a light color layer, the pattern and the pattern are formed. And a laminated body of the dark color layer and the light color layer formed in the above.

-Transparent Substrate- The material of the transparent substrate is not particularly limited as long as it is transparent (meaning "transparent to visible light"; the same applies below), but examples thereof include polyester and polyethylene terephthalate. (PET), polybutylene terephthalate,
Polymethylmethacrylate (PMMA), acrylic resin, polycarbonate (PC), polystyrene, triacetate resin, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl butyral, metal ion crosslinked ethylene-methacryl Acid copolymer, polyurethane,
Cellophane and the like. Among these, polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), etc. are highly resistant to load (heat, solvent, bending, etc.) during processing and have particularly high transparency. preferable.

Generally, the thickness of the transparent substrate is preferably about 1 μm to 5 mm.

-Formation of Pattern- The pattern is formed using a substance soluble in a solvent. In the present invention, using such a solvent-soluble substance, after forming a pattern on a transparent substrate, to form a dark color layer and a light color layer insoluble in the solvent, using the solvent,
The pattern and the dark color layer and the light color layer formed on the pattern are removed. As a result, by leaving the dark color layer and the light color layer formed in the area other than the area where the pattern is formed on the transparent substrate, the dark color layer and the light color layer are ensured on the transparent substrate while maintaining a certain transmittance. A privacy protection window material having a color layer is preferably obtained. Therefore, in the present invention, the punching process or the like which has been conventionally performed is not necessary, and when forming the dark color layer and the light color layer, accurate alignment of these in printing or the like is not necessary, and the reflectance is provided by metal deposition. Since it is possible to form a bright color layer having high efficiency, the manufacturing efficiency and the easiness of manufacturing are excellent.

The material used for forming the pattern is relatively selected in relation to the solvent used for the subsequent removal. For example,
A water-soluble substance is used when an aqueous solvent is used as the solvent, and an oil-soluble substance is used when an oil-based solvent is used as the solvent. Examples of the solvent include known organic solvents and the like, but water is particularly preferable in view of its low cost and environmental impact. The water may be ordinary water (tap water, distilled water, ion-exchanged water, etc.) or an aqueous solution containing an acid, an alkali, a surfactant and the like.

When the solvent is water, the material used for forming the pattern is preferably a water-soluble resin or the like, and polyvinyl alcohol is particularly preferable because it has good water solubility. If desired, the material used for forming the pattern may be mixed with a pigment, a dye, or the like for facilitating confirmation of the finished state.

The method for forming the pattern is not particularly limited, and known pattern forming methods such as printing, coating and vapor deposition can be mentioned. Among these, printing is preferable in that a precise pattern can be formed more efficiently. Examples of the printing method include gravure printing, screen printing, inkjet printing, electrostatic printing, and the like. Among these, gravure printing is particularly preferable in that a precise pattern can be formed more efficiently. In the printing, negative pattern printing is particularly preferable.

The shape of the pattern is not particularly limited and may be dot shape such as circle, ellipse and square (square etc.), line shape, lattice shape, etc., but more efficient and uniform privacy. The dot shape is preferable, and the circular dot shape is particularly preferable, from the viewpoint that a protective window material can be formed. When the dot is circular, its diameter is 100 to 50.
The gap between the dots is preferably about 0 μm, and the gap between the dots is preferably narrow in view of the light transmittance and the visibility when observing indoors and outdoors, and is preferably about 1 to 50 μm. The thickness of the pattern is not particularly limited, but is 0.1 to 5
About μm is preferable.

In the present invention, the material used for forming the pattern may be one having a low viscosity. Therefore, as described above, a pattern with a very small gap between the patterns is formed. The area between the patterns is
Since it is a region where the dark color layer and the light color layer are formed, in the present invention, it is possible to provide a privacy protection window material having excellent light transmittance and visibility when observing indoors and outdoors. .

-Formation of Dark Color Layer and Light Color Layer- The dark color layer is not particularly limited as long as it is insoluble in the solvent and suppresses reflection of light.
It is preferably formed by coating or printing a black or dark color paint, metal vapor deposition, plating and the like. Among these,
From the viewpoints of cost and productivity, coating or printing with a black or dark color paint is particularly preferable, and solid printing is particularly preferable. It is also preferable to print in the form of fine dots in order to improve the permeability of the solvent. As the black or dark color paint, for example, when the solvent is water, in addition to inorganic pigments such as carbon black, organic pigments, oil dyes, disperse dyes, etc., resins such as urethane and acrylic resin, pigments Processed pigments in which are dispersed are listed. Among these, processed pigments in which a pigment is dispersed in a resin such as urethane or acrylic resin are particularly preferable.

The light color layer is not particularly limited as long as it is insoluble in the solvent and has a high light reflectance. For example, white or light color paint is applied or printed, or metal vapor deposition is used. It is preferably formed by mirror finishing, plating, or the like. Among these, in terms of cost and productivity,
The application or printing of a white or light-colored paint is particularly preferred, and the solid printing on the front surface is particularly preferred. As the white or light color paint, for example, when the solvent is water, in addition to inorganic pigments, organic pigments, oil-based dyes, disperse dyes, etc., urethane, acrylic resin, or other resin, the pigment is dispersed. Processed pigments and the like. Among these, processed pigments in which a pigment is dispersed in a resin such as urethane or acrylic resin are particularly preferable.

The thickness of the dark color layer is 100 to 50.
00Å is preferable, and 100 to 1000Å is more preferable. If the thickness is less than 100Å, the light reflection preventing effect may not be sufficient, while if it exceeds 5000Å, it may be difficult to remove. The thickness of the light color layer is preferably 100 to 5000Å, 100 to 1000
Å is more preferable. If the thickness is less than 100Å, the light reflection effect may not be sufficient, while 500
If it exceeds 0Å, it may be difficult to remove.

-Removal- In the removal, the pattern and the laminate of the dark color layer and the light color layer formed on the pattern are removed by the solvent. The removal method is not particularly limited as long as the pattern and the laminate of the dark color layer and the light color layer formed on the pattern can be suitably removed, but, for example, washing with the solvent or the like can be performed. Can be mentioned. At the time of the cleaning, if desired, an ultrasonic irradiation brush,
You may use together a dissolution promotion means, such as a sponge. By the removal, the pattern formed of the substance soluble in the solvent is dissolved, and further, the laminated body of the dark color layer and the light color layer formed on the pattern is peeled off as the pattern is dissolved, and a region between the patterns is formed. Only the dark color layer and the light color layer that have been formed remain without peeling off, and if necessary, final washing (rinsing) and drying are performed to secure a certain transmittance, while stacking the dark color layer and the light color layer. A privacy protection window material having a body formed on a transparent substrate is obtained.

An example of the method for manufacturing the privacy protection window material of the present invention will be described with reference to FIGS. 1 to 4
[Fig. 3] is a schematic cross-sectional view for sequentially explaining a method for manufacturing a privacy protection window material of the present invention. In the present invention, first, dots 2 are formed on a transparent substrate 1 using a substance soluble in a solvent (FIG. 1). Next, the dark layer 3 insoluble in the solvent
(FIG. 2), a light-colored layer 4 insoluble in the solvent is formed, and a laminate of the dark-colored layer 3 and the light-colored layer 4 is formed (FIG. 3). By removing the dark color layer 3 and the light color layer 4 formed on the dots 2, the privacy protection window material 10 is obtained (FIG. 4).

According to the method for manufacturing a privacy protection window material of the present invention described above, a privacy protection window material is manufactured efficiently and at low cost, which is excellent in both privacy protection property and visibility when observing indoors and outdoors. A method can be provided.

[Privacy Protecting Window Material] The privacy protecting window material of the present invention is obtained by the method for manufacturing a privacy protecting window material of the present invention, and has a laminate of a dark color layer and a light color layer on a transparent substrate. The transparent substrate, a dark layer, and
The light-colored layer is the same as that described in the manufacturing method of the privacy protection window material of the present invention.

The light reflectance (%) of the light color layer is preferably 3.0% or more, more preferably 10% or more, higher than the light reflectance (%) of the dark color layer. If the difference in the light reflectance (%) is less than 3.0%, at least one of the privacy protection property and the visibility when observing the inside from the outside may be insufficient.

The light reflectance (%) in the light color layer is relatively determined by the relationship with the light reflectance in the dark color layer, but is usually preferably about 5 to 30%, and 10 to 20.
% Is more preferable. If the light reflectance (%) is less than 5%, the privacy protection may not be sufficient, while if it exceeds 30%, the light reflectance (%) is too high, which may disturb the appearance. is there.

The light reflectance (%) in the dark color layer is relatively determined by the relationship with the light reflectance in the light color layer, but is usually preferably less than 5%, more preferably less than 3%. If the light reflectance (%) exceeds 5%, the visibility when observing the inside from the outside may be insufficient.

FIG. 5 shows a privacy protection window material 1 of the present invention.
It is a schematic block diagram showing the state which looked at 0 from the front. Figure 5
Then, the privacy protection window material 10 has a dark color layer (not shown) and a light color layer 4 in this order on the transparent substrate 1.

As described above, the privacy protection window material of the present invention can be obtained efficiently and at low cost, and is excellent in both privacy protection and visibility when observing indoors and outdoors. It is also useful as a window material for automobiles and the like. When used as a window material for general buildings and automobiles, it is preferable to use a light color layer on the outdoor (outside of the vehicle) side and a dark color layer on the indoor (inside of the vehicle) side. By using it in this way, when observing from the light color layer side (outdoor side), it is difficult to see the other side (indoor side) of the window due to the high light reflectance, while from the dark color layer side (indoor side) In observation, since the light ray reflectance is low and it looks dark, it is easy to see the other side (indoor side) of the window material. When the privacy protection window material of the present invention is used for a building or a vehicle window material, a glass plate or the like may be used as a transparent substrate and a dark color layer and a light color layer may be directly provided, or a glass plate or the like may be separately provided. The window material may be prepared and the privacy protection window material of the present invention may be attached to the window material.
Further, when used as a window material or the like in general construction, the color / pattern of the light color layer may be not only a single color or a geometrical pattern, but also a multicolor or a pattern such as an art drawing.

[0030]

EXAMPLES The present invention will be specifically described below by showing Examples and Comparative Examples, but the present invention is not limited to the following Examples.

-Production of privacy protection window material- 20% of polyvinyl alcohol on a polyethylene terephthalate film (transparent substrate, thickness: 250 μm)
Dots were printed using the solution, and dots 2 were formed on the transparent substrate 1 as shown in FIG. The formed dots had a perfect circle shape with a diameter of 200 μm, the inter-dot gap was 250 μm in the center-to-center distance, and the dot thickness was 2 μm. The dots were regularly arranged in a square lattice pattern on the polyethylene terephthalate film.

Next, a urethane black ink is printed on the entire surface of the solid black ink, and as shown in FIG. 2, the dark color layer 3 (thickness:
1000 Å) formed. On top of that, urethane-based white ink is printed on the entire surface, and as shown in FIG.
(Thickness: 1000Å) was formed. After that, with water,
Dots, dark color layer and light color layer formed on the dots,
Was removed by washing to obtain a privacy protection window material 10 as shown in FIG.

<Measurement of reflectance> The light reflectance (%) on the dark color layer side (black ink printing side) and the light ray reflectance (%) on the light color layer side (white ink printing side) of the privacy protection window material are shown. It measured as follows. The results are shown in Table 1.
Using a Hitachi spectrophotometer (U-4000; manufactured by Hitachi, Ltd.), 5 ° specular reflection of light having a wavelength of 550 nm was measured, and the light reflectance (%) was measured.

[0034]

[Table 1]

In the privacy protection window materials obtained in the examples, the light reflectance (%) on the light color layer side (white ink printing side) is the light ray reflectance on the dark color layer side (black ink printing side). It is 4.0% larger than (%), it is difficult to visually recognize the other side when observed from the light color layer side, and it is easy to visually recognize the other side when observed from the dark color layer side.

[0036]

According to the present invention, efficient and low cost,
It is possible to provide a privacy protection window material excellent in both privacy protection property and visibility when observing indoors and outdoors, and a manufacturing method thereof.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a method for manufacturing a privacy protection window material of the present invention.

FIG. 2 is a schematic view for explaining a method for manufacturing a privacy protection window material of the present invention.

FIG. 3 is a schematic view for explaining a method for manufacturing a privacy protection window material of the present invention.

FIG. 4 is a schematic diagram for explaining a method for manufacturing a privacy protection window material of the present invention.

FIG. 5 is a schematic configuration diagram showing a state in which the privacy protection window material of the present invention is viewed from the front.

[Explanation of symbols]

1 transparent substrate 2 dots 3 dark layers 4 Light color layer 10 Privacy protection window materials

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masato Yoshikawa             3-16-15-102, Kamimizuhonmachi, Kodaira-shi, Tokyo F term (reference) 2H113 AA01 AA03 AA06 BA03 BA09                       BA31 BB07 BB22 BC14 DA47                       DA48 DA49 DA52 DA54 DA57                       DA58 EA07 EA17 FA09 FA10                 4F100 AK21 AK42 AK51 AT00A                       BA03 BA07 BA10A BA10C                       EH46B EH66B EH66C EH71B                       EH71C GB07 HB00B HB00C                       HB31 JN01A JN02B JN06C                       YY00B                 4G059 AA01 AB07 AC08 AC30 FA13                       FA15 FA17 FA27 FB06 GA01                       GA05 GA11

Claims (12)

[Claims] 1. A pattern is formed on a transparent substrate using at least a solvent-soluble substance to form a laminate of a dark color layer and a light color layer which is insoluble in the solvent, and then the pattern is formed by the solvent. And a laminated body of a dark color layer and a light color layer formed on the pattern, the method for producing a privacy protection window material. 2. The method for manufacturing a privacy protection window material according to claim 1, wherein the dark color layer is formed by applying or printing a black or dark color paint, metal vapor deposition, and / or plating. 3. The privacy protection window material according to claim 1, wherein the light color layer is formed by at least one of coating or printing of white or light color paint, mirror finishing by metal deposition, and plating. Manufacturing method. 4. The method for producing a privacy protection window material according to claim 1, wherein the dark color layer has a thickness of 100 to 5000 Å, and the light color layer has a thickness of 100 to 5000 Å. 5. The method for manufacturing a privacy protection window material according to claim 1, wherein the solvent is water. 6. The method for manufacturing a privacy protection window material according to claim 1, wherein the solvent-soluble substance is a water-soluble resin. 7. The method for manufacturing a privacy protection window material according to claim 6, wherein the water-soluble resin is polyvinyl alcohol. 8. The method for manufacturing a privacy protection window material according to claim 1, wherein the pattern is a dot pattern and is formed by printing. 9. A privacy product, which is obtained by the method for manufacturing a privacy protection window material according to any one of claims 1 to 8, and has a laminate of at least a dark color layer and a light color layer on a transparent substrate. Protective window material. 10. The light reflectance (%) in the light color layer is
The privacy protection window material according to claim 9, which is greater than the light reflectance (%) in the dark layer by 3.0% or more. 11. The privacy protection window material according to claim 9, which is used for a building or a window material for a vehicle. 12. When used in a building or window material for a car,
The privacy protection window material according to claim 11, which is used by arranging a light color layer on the outdoor side and a dark color layer on the indoor side.