Indoor invisibility film

Abstract

The object of the present invention is to provide a film that effectively blocks views from the outdoors while maintaining a good view from indoors under daytime and nighttime conditions where the light and dark are reversed. [Solution] This invention adopts a structure in which a geometric pattern such as a grid or polka dot pattern is printed on an adhesive transparent film (B50) in a color with high brightness and saturation such as white or gray on the surface that can be seen from outside (outdoor side) (B30), and printed on top of the (B30) in a color with low brightness and saturation such as black on the surface that can be seen from inside (indoor side) (B40). Furthermore, in the case of inkjet printing, a protective transparent laminate layer (B20) is provided on the outside of the film to improve durability. This ensures visibility from inside while blocking views from outside.

Description

[Technical field]

[0001] This invention relates to a technical means for blocking the view from inside the house and protecting privacy without spoiling the view from inside the house to the outside, even when it is dark inside and bright outside. [Background technology]

[0002] Conventionally, as for privacy glass films, those with simple milky white color or geometric patterns, as shown in Utility Model Document 1 and Non-Patent Document 1, have been used or devised.

[0003] However, while the above-mentioned privacy glass films were effective in blocking views from the bright outdoors to the dark indoors, they had the disadvantage that at night, light from inside the building leaked out to the outside, making it easier to see inside.

[0004] Furthermore, when viewing the outdoor scenery from indoors during the day, conventional privacy glass films are printed in white or gray, which significantly limits visibility.

[0005] When considering the effect of blocking views, white-printed privacy glass film has a strong tendency to reflect light, and in bright places, this reflective effect makes it difficult to see inside from dark places.

[0006] On the other hand, black-printed privacy glass films have a strong tendency to absorb light, and while they can be expected to have the effect of blocking views by making the entire window appear dark, they tend to blend in with the background in dark places, and therefore may have a poor reflective effect in bright places.

[0007] As a way to compensate for this shortcoming, changes to the printing ratio, shape, and pattern of the colored parts of the privacy glass film have been considered, but these methods tend to reduce the visibility of the scenery from inside the building, and have not yet led to a sufficient improvement. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Utility Model Registration No. 322486 [Non-patent literature]

[0009] [Non-Patent Document 1] 3M Japan Co., Ltd., "3M Glass Finishes", p.21-49, [online], July 2024, [accessed November 27, 2024]<URL:https: / / multimedia.3m.com / mws / media / 2277119O / gla-120-glass-finishes- samplebook.pdf> This pamphlet contains detailed technical information about 3M's glass film and is believed to be useful in understanding the technical background of the present invention. Summary of the Invention [Problem to be solved by the invention]

[0010] The object of the present invention is to provide a film that effectively blocks views from the outdoors while maintaining a good view from indoors under daytime and nighttime conditions where the light and dark are reversed. [Means for solving the problem]

[0011] This invention uses a transparent film that is attached to window glass, with the surface that can be seen from the outside (outdoor side) printed in a color with high brightness and saturation such as white or gray, and the surface that can be seen from inside (indoor side) printed in a color with low brightness and saturation such as black. This ensures visibility from inside while blocking the view from outside. Effect of the Invention

[0012] The glass film of the present invention has the following advantages: 1. Effectively protect indoor privacy day or night 2. The outdoor scenery can be seen clearly from indoors, improving visibility. 3. The film is attached to the inside (inner application), making it easy to install and handle on site. [Brief description of the drawings]

[0013] [Figure 1] Structural diagram of indoor invisibility film seen from the outdoor side [Diagram 2] Structural diagram of indoor invisibility film as seen from inside the room [Diagram 3] A cross-sectional side view of an indoor invisible film for exterior application applied to a glass substrate using inkjet printing [Figure 4] Side cross-sectional view of an indoor invisible film for interior lining applied to a glass substrate using inkjet printing [Diagram 5] A cross-sectional side view of an indoor invisible film for exterior application, attached to a glass substrate using silk printing [Explanation of symbols]

[0014] Figure 1 is a structural diagram of the surface (outdoor side) of an indoor invisible film with the concealing areas printed in white. Figure 2 is a structural diagram of the reverse side (indoor side) of the indoor invisible film, with the concealing areas printed in black.

[0015] B10: Glass substrate, B20: Protective film laminate, B30... White printed layer on the outdoor side, B40... Black printed layer on the indoor side, B50...Transparent film layer with adhesive

[0016] The glass substrate (B10) in Figures 3, 4, and 5 is shown indoors on the right and outdoors on the left. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS EXAMPLES

[0017] As shown in Figure 3, an indoor invisible film for outdoor use is formed by forming an adhesive film layer (B50) with a black colored layer (B40) on the indoor side and a white or gray colored layer (B30) on the outdoor side in a grid pattern as shown in Figures 1 and 2. This colored layer can be easily produced by inkjet printing or silk printing. Furthermore, in the case of inkjet printing, a protective transparent laminate layer (B20) is provided on the outside of the film to improve durability.

[0018] As shown in Figure 4, indoor invisible film for indoor use is formed by overlapping an adhesive film layer (B50) with a white or gray color on the outdoor side and a black colored layer (B40) on the indoor side in a grid pattern as shown in Figures 1 and 2. Furthermore, in the case of inkjet printing, a protective transparent laminate layer (B20) is provided on the outside of the film to improve durability.

[0019] The film can be applied either externally or internally, depending on the environment in which it will be used. During the day, the film reflects external light, making it difficult to see inside from the outside, and it maintains its line of sight blocking effect even at night. [Industrial Applicability]

[0020] This device is applicable to both exterior and interior cladding, so there is no need to install scaffolding for high-altitude work, which was previously necessary for outdoor work on buildings and high-rise apartment buildings, and it is possible to reduce risk. Furthermore, since it is an indoor work, it is not affected by weather or temperature, and stable work can be done all year round. In addition, construction tests can be easily carried out in an indoor environment, making construction efficient and safe.

Claims

1. Transparent glass substrate, (a) A white or grey printed layer is formed on the exterior side. (b) A black printing layer has formed on the indoor side. (c) a protective laminate layer has a structure covering the surface of the printing layer, (d) A film for indoor invisibility purposes, characterized in that it can be attached to window glass using an interior application method.

2. 2. The indoor invisibility film according to claim 1, wherein the white or gray printed layer is formed by inkjet printing, and the black printed layer is formed by silk printing.

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