Shading one-way perspective film

Abstract

The utility model discloses a shading one-way perspective film which comprises a three-layer structure, and the three-layer structure comprises a first layer, a second layer and a third layer. The first layer is a weather-proof high-transmittance reflecting PT film; the second layer is a black PT film or a black surface formed by spraying black ink; the third layer is a high-transmittance black PT film; the first layer and the second layer are pressed to form two composite layers in a structural adhesive hot pressing mode, a punching area is arranged on the two composite layers, a plurality of punched holes are distributed in the punching area, and the punched holes are different in shape and size; the plurality of punched holes comprise punched holes with larger apertures and punched holes with smaller apertures, and the punched holes with larger apertures and the punched holes with smaller apertures are arranged in a staggered manner in the punching area. According to the utility model, the complexity and predictability of punching design are increased, an excellent one-way perspective effect is realized, experimental data show that the perspective of the utility model is far lower than that of the traditional design under different illumination, and the privacy protection effect is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way perspective films, in particular to a light-shielding one-way perspective film. Background Art

[0002] Light-blocking one-way perspective film is a special functional film material, whose main feature is that it can achieve clear view from one side to the other side, while it is difficult to see through from the other side. This film material is widely used in the fields of privacy protection, advertising display, car window film, etc., aiming to provide a visual one-way perspective effect while maintaining effective light blocking.

[0003] In the traditional design of light-shielding one-way vision film, in order to achieve the one-way vision function, a punching process is usually used to punch holes of a certain shape and layout on a specific layer of the film. The shape and layout of these holes are crucial to achieving the ideal one-way vision effect. However, the existing punching design often uses simple circular or square holes, which are evenly distributed on the film at a certain interval. Although this design can achieve one-way vision to a certain extent, there are many problems in practical applications.

[0004] First, the traditional uniform punching design often fails to provide the ideal one-way perspective effect. Since the holes are of a single shape and evenly distributed, the perspective effect is easily affected by light and viewing angle, resulting in a certain degree of view still being visible from the non-perspective side, reducing the effect of privacy protection.

[0005] In order to solve the above problems, the prior art usually adopts the method of adjusting the size, shape and layout of the holes to make improvements. For example, some technologies try to increase the complexity and unpredictability of the perspective effect by changing the shape or layout of the holes. However, these improvement schemes often have limited effects.

[0006] In addition, there is a simple layout method of the same hole size in the prior art. However, this layout method also has the problem of poor perspective effect in practical applications. Since the holes are of the same size and evenly distributed, it is impossible to provide a stable one-way perspective effect under different light and observation angles, which greatly reduces the privacy protection effect.

[0007] Therefore, how to provide an improved light-shielding one-way perspective film to achieve a stable one-way perspective effect under different light and observation angles has become a technical problem to be solved by the present utility model. Utility Model Content

[0008] The technical problem solved by the present invention is to provide a light-shielding one-way perspective film in response to the defects existing in the above-mentioned prior art, so as to solve the problems mentioned in the above-mentioned background technology that the traditional light-shielding one-way perspective film has poor perspective effect, short service life and cannot provide stable one-way perspective effect under different light and observation angles.

[0009] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0010] A light-shielding one-way perspective film comprises a three-layer structure, wherein the three-layer structure comprises a first layer, a second layer and a third layer;

[0011] The first layer is a weather-resistant and highly transparent reflective PT film;

[0012] The second layer is a black PT film or a black surface formed by spraying black ink;

[0013] The third layer is a high-transmittance black PT film;

[0014] The first layer and the second layer are pressed together by heat pressing with structural adhesive to form two composite layers, and a punching area is provided on the two composite layers, and a plurality of punching holes are distributed in the punching area, and the plurality of punching holes have different shapes and sizes from each other;

[0015] The plurality of punching holes include punching holes with a larger aperture and punching holes with a smaller aperture, and the punching holes with a larger aperture and the punching holes with a smaller aperture are alternately arranged in the punching area.

[0016] As a further solution of the present invention, the overall layer thickness of the first layer is 20-50 um.

[0017] As a further solution of the present invention, the overall layer thickness of the second layer is 20-50 um.

[0018] As a further solution of the present invention, the overall layer thickness of the third layer is 25-36 um.

[0019] As a further solution of the utility model, the punching holes on the first layer and the second layer are designed to be unevenly distributed, and the shapes of the holes include but are not limited to circle, oval, triangle, square, hexagon or a combination thereof.

[0020] As a further solution of the utility model, the composite layer after punching the first layer and the second layer is combined with the third layer to form an integrated structure through structural adhesive.

[0021] As a further solution of the utility model, the punching holes with larger apertures and the punching holes with smaller apertures are staggered to form an irregular punching array.

[0022] Compared with the prior art, the beneficial effects of the present invention are: increasing the complexity and unpredictability of the punching design, achieving an excellent one-way perspective effect. Experimental data show that under different lighting conditions, the perspective of the present invention is much lower than that of the traditional design, and the privacy protection effect is significantly improved.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 It is a schematic diagram of experimental data of the utility model.

[0027] Figure 3 It is a schematic diagram of the structure when larger aperture punching holes and smaller aperture punching holes are evenly arranged in a complex form on the composite layer.

[0028] The reference numerals and names in the figures are as follows:

[0029] First layer 1 , second layer 2 , third layer 3 , punching area 4 , larger aperture punching 5 , smaller aperture punching 6 , composite layer 7 and three-layer structure 8 . DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1 —3. In the embodiment of the utility model, a light-shielding one-way perspective film comprises a three-layer structure 10, wherein the three-layer structure 10 comprises a first layer 1, a second layer 2 and a third layer 3; the first layer 1 is a weather-resistant and highly transparent reflective PT film; the second layer 2 is a black PT film or a black surface formed by spraying black ink; the third layer 3 is a highly transparent black PT film;

[0032] Among them, the first layer 1 is a weather-resistant and highly transparent reflective PT film. The PT film (polyester film) here is a plastic film with excellent mechanical properties, optical properties and chemical stability. Weather resistance means that the film can maintain its stable performance under various climatic conditions and is not easily affected by environmental factors such as ultraviolet rays, high temperature and low temperature and aged. High transmittance means that the film has a high light transmittance and can maintain the clarity of the scene. Reflectivity means that the film can reflect a certain proportion of light, which helps to enhance the one-way perspective effect. This layer can use the common polyester film products with high reflection and high transmittance on the market.

[0033] The second layer 2 is a black PT film or a black surface formed by spraying black ink. The main function of this layer is to absorb light and reduce the transmission of light, thereby enhancing the one-way perspective effect. The black PT film is also a polyester film, but its surface is specially treated or coated with black ink to make it appear black and have high light absorption. If the black surface is formed by spraying black ink, it is necessary to select a black ink with high hiding power and high light absorption, and ensure that the ink is evenly distributed on the film surface and firmly adheres. This layer can be achieved by using the common black polyester film or black ink on the market.

[0034] The third layer 3 is a high-transmittance black PT film, which is similar to the second layer. It is also made of polyester film, but also has high transmittance. However, unlike the second layer, the black color of the third layer does not significantly affect its light transmittance, which means that it can absorb part of the light and reduce reflection while maintaining a certain light transmittance. Such a design helps to further improve the one-way perspective effect, making it more difficult to see the scene on the other side of the film material from the non-perspective side. This layer can also be achieved using the high-transmittance black polyester film products commonly found on the market.

[0035] The first layer 1 and the second layer 2 are pressed together by hot pressing with structural adhesive to form a composite layer 7, and a punching area 4 is provided on the composite layer 7 of the two layers, and a plurality of punchings are distributed in the punching area 4, and the plurality of punchings have different shapes and sizes from each other; the plurality of punchings include larger aperture punchings 5 ​​and smaller aperture punchings 6, and the larger aperture punchings 5 ​​and the smaller aperture punchings 6 are arranged alternately in the punching area 4; the overall layer thickness of the first layer 1 is 20-50um; the overall layer thickness of the second layer 2 is 20-50um; the overall layer thickness of the third layer 3 is 25-36um.

[0036] The punching holes on the first layer 1 and the second layer 2 are designed to be unevenly distributed, and the shapes of the holes include but are not limited to circular, elliptical, triangular, square, hexagonal or a combination thereof; all of which are extended implementations known to those skilled in the art, and the composite layer after punching the first layer 1 and the second layer 2 is then formed into an integrated structure with the third layer 3 through structural adhesive; the staggered arrangement of larger aperture punching holes 5 and smaller aperture punching holes 6 forms an irregular array of punching holes; wherein, the larger aperture punching holes 5 and the smaller aperture punching holes 6 refer to the relative aperture sizes between the two. Specifically, the larger aperture punching holes 5 have a relatively larger diameter, while the smaller aperture punching holes 6 have a relatively smaller diameter. As Figure 3 As shown, the punching holes have multiple different diameters and are staggered in the punching area to form an irregular punching array for providing a more complex and unpredictable one-way perspective effect, so as to enhance the privacy protection effect.

[0037] Embodiment 1:

[0038] This embodiment provides a light-shielding one-way perspective film, the structural design of which aims to solve the problems of poor perspective effect of conventional light-shielding one-way perspective films. The light-shielding one-way perspective film comprises a three-layer structure 10, namely a first layer 1, a second layer 2 and a third layer 3.

[0039] The first layer 1 is a weather-resistant and highly transparent reflective PT film, which has excellent weather resistance and high light transmittance, and can ensure that the film material will not fade or age in outdoor environments for a long time. The overall layer thickness of this layer is 20-50um, which ensures the strength and durability of the film material.

[0040] The second layer 2 is a black PT film or a black surface formed by spraying black ink. The black surface can effectively absorb light, reduce the reflection and transmission of light, and thus enhance the one-way perspective effect. At the same time, the black surface also has a certain covering effect, which can cover the possible defects or uneven parts on the first layer 1, and improve the appearance quality of the film material. The overall layer thickness of this layer is also 20-50um.

[0041] The third layer 3 is a high-transmittance black PT film with high light transmittance and black light-shielding performance. It can not only further enhance the one-way perspective effect, but also improve the overall strength and durability of the film material. The overall layer thickness of this layer is 25-36um.

[0042] Two composite layers are formed between the first layer 1 and the second layer 2 by hot pressing with structural adhesive to form a composite layer. A punching area 4 is provided on the composite layer, and a plurality of punching holes are distributed in the punching area 4. These punching holes have different shapes and sizes from each other, including larger aperture punching holes 5 and smaller aperture punching holes 6. The larger aperture punching holes 5 and the smaller aperture punching holes 6 are staggered in the punching area 4 to form an irregular punching array, providing a more complex and unpredictable one-way perspective effect. Specifically, the traditional uniform punching design is easily affected by light and viewing angle due to its single hole shape and uniform distribution, resulting in a certain degree of view still visible from the non-perspective side. The punching design in this embodiment breaks the traditional perspective law by introducing punching holes of different shapes and sizes and staggering them in the punching area 4, making the perspective effect more unpredictable.

[0043] For example, when light is irradiated onto the film material from different angles, the larger aperture punching 5 and the smaller aperture punching 6 will produce different refraction and reflection effects on the light. This effect is superimposed to form a complex optical phenomenon, making it difficult to see the scene on the other side of the film material from the non-perspective side. At the same time, due to the diverse design of the punching shape and size, the complexity and unpredictability of the perspective effect are further increased.

[0044] The effectiveness of the punching design of this embodiment can be further verified by specific experimental data. For example, under the same lighting conditions, the perspective effect of the traditional uniform punching design and the punching design of this embodiment are tested. The experimental results show that the punching design of this embodiment is significantly better than the traditional design in terms of perspective effect. When observed from the non-perspective side, the traditional design can still see a certain degree of scene outline and details, while the design of this embodiment can hardly see any scene information.

[0045] Furthermore, the shapes of the punching holes include but are not limited to circular, oval, triangular, square, hexagonal or a combination thereof. Such a diverse punching hole shape design can further increase the complexity and unpredictability of the perspective effect. At the same time, the distribution of the punching holes on the first layer 1 and the second layer 2 is non-uniform, and this design can provide a more stable one-way perspective effect according to different light and observation angles.

[0046] The composite layer after punching the first layer 1 and the second layer 2 is then bonded to the third layer 3 through structural adhesive to form an integrated structure. This structural design can ensure the overall strength and durability of the membrane material while maintaining an excellent one-way perspective effect.

[0047] In practical applications, the light-shielding one-way perspective film can be widely used in the fields of privacy protection, advertising display, car window film, etc. Due to the use of non-uniform punching design and diversified punching shapes, it can provide a more complex and unpredictable one-way perspective effect, thereby effectively protecting privacy. At the same time, the covering effect of the black surface and the strength design of the overall structure also make the film material have a longer service life and higher appearance quality. Compared with the traditional light-shielding one-way perspective film, the light-shielding one-way perspective film provided in this embodiment has been significantly improved in perspective effect and durability.

[0048] Embodiment 2:

[0049] This embodiment further describes in detail the specific structure and experimental data of the light-shielding one-way perspective film to verify its superiority and practicality.

[0050] 1. Structure and preparation.

[0051] The light-shielding one-way perspective film provided in this embodiment includes a three-layer structure 10: the first layer 1 is a weather-resistant and highly transparent reflective PT film, the second layer 2 is a black PT film or a black surface formed by spraying black ink, and the third layer 3 is a highly transparent black PT film. The first layer 1 and the second layer 2 are pressed together by hot pressing of a structural adhesive to form a two-layer composite layer, and a punching area 4 is provided on the composite layer. A plurality of punching holes are distributed in the punching area 4, and these punching holes have different shapes and sizes, including larger aperture punching holes 5 and smaller aperture punching holes 6, which are staggered to form an irregular punching array.

[0052] In the specific preparation process, the material and thickness of each layer, as well as the shape, size and distribution of the punching holes can be adjusted as needed. After the preparation is completed, a light-shielding one-way perspective film with excellent one-way perspective effect can be obtained.

[0053] 2. Experimental data and results analysis.

[0054] In order to more specifically verify the perspective effect of the light-shielding one-way perspective film of this embodiment, we conducted the following detailed perspective effect test and recorded specific data.

[0055] Perspective effect test:

[0056] We built a standard test environment, which includes a brightness adjustable lighting source, a test bench, and a frame for fixing the film material. During the test, we fixed the light-shielding one-way perspective film with a traditional uniform punching design and the light-shielding one-way perspective film in this embodiment on the frame respectively, and ensured that both were under the same lighting conditions.

[0057] Next, we used a high-definition camera to photograph the two film materials from the non-perspective side and recorded the clarity of the scene under different lighting conditions. In order to quantify the perspective effect, we used image analysis software to process the photos, extract the outline and detail information of the scene, and calculate the corresponding clarity index.

[0058] At the same time, in order to make our data more convincing and easier to understand, we can adopt a common method of quantifying clarity and assign a specific unit to the clarity indicator. For example, we can use "perspective" as a unit, which is a custom indicator used to describe how much scene information can be seen from the non-perspective side. The higher the perspective, the more scene information can be seen from the non-perspective side; the lower the perspective, the less scene information can be seen from the non-perspective side.

[0059] In one embodiment of the present invention, Figure 3 Under the arrangement of Figure 2 As shown in the figure, the lower the clarity index is, the less scene information is seen from the non-perspective side, and the better the perspective effect is.

[0060] from Figure 2 It can be seen that under different lighting conditions, the clarity index of the light-shielding one-way perspective film in this embodiment is significantly lower than that of the traditional design. This shows that the punching design in this embodiment can provide a more complex and unpredictable one-way perspective effect, and almost no scene information can be seen from the non-perspective side, thereby effectively improving the privacy protection effect.

[0061] 3. Conclusion

[0062] In summary, the shading one-way perspective film provided in this embodiment achieves a more complex and unpredictable one-way perspective effect by using punching holes of different shapes and sizes and a staggered layout. Experimental data show that the film material is superior to traditional designs in terms of perspective effect. Therefore, the technical solution of this embodiment has significant advancement and practicality, and can be widely used in the fields of privacy protection, advertising display, car window film, etc.

[0063] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0064] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A light-shielding one-way perspective film, characterized in that: The three-layer structure includes a first layer, a second layer and a third layer; The first layer is a weather-resistant and highly transparent reflective PT film; The second layer is a black PT film or a black surface formed by spraying black ink; The third layer is a high-transmittance black PT film; The first layer and the second layer are pressed together by heat pressing with structural adhesive to form two composite layers, and a punching area is provided on the two composite layers, and a plurality of punching holes are distributed in the punching area, and the plurality of punching holes have different shapes and sizes from each other; The plurality of punching holes include punching holes with a larger aperture and punching holes with a smaller aperture, and the punching holes with a larger aperture and the punching holes with a smaller aperture are alternately arranged in the punching area.

2. The light-shielding one-way perspective film according to claim 1, characterized in that: The overall layer thickness of the first layer is 20-50um.

3. The light-shielding one-way perspective film according to claim 1, characterized in that: The overall layer thickness of the second layer is 20-50um.

4. The light-shielding one-way perspective film according to claim 1, characterized in that: The overall layer thickness of the third layer is 25-36um.

5. The light-shielding one-way perspective film according to claim 1, characterized in that: The punching holes on the first layer and the second layer are designed to be unevenly distributed, and the shapes of the holes include but are not limited to circle, oval, triangle, square, hexagon or a combination thereof.

6. The light-shielding one-way perspective film according to claim 1, characterized in that: The composite layer after punching the first layer and the second layer is then combined with the third layer through structural adhesive to form an integrated structure.

7. The light-shielding one-way perspective film according to claim 1, characterized in that: The staggered arrangement of the punching holes with larger apertures and the punching holes with smaller apertures forms an irregular punching array.

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