Composite laser film with variable expression effect

Abstract

The utility model discloses a composite laser film with variable expression effect, which sequentially comprises a laser film, a transparent waterproof adhesive film, a first polyvinyl alcohol film, a polyacrylic acid film and an outermost film, the outermost film is a second polyvinyl alcohol film or an inclined hole film, the second polyvinyl alcohol film serving as the outermost film covers the polyacrylic acid film, and the second polyvinyl alcohol film covers the inclined hole film. The composite film is directly or indirectly compounded with a polyacrylic acid film; the inclined hole film serving as the outermost film is bonded and fixed on the periphery through the cold-pressing rubber frame, the inclined hole film covers, contacts but is not compounded with the polyacrylic acid film, a plurality of inclined holes penetrating through the inclined hole film are formed in the inclined hole film, and the polyacrylic acid film can be communicated with the external environment through the inclined holes; the inclined directions of the plurality of inclined holes are the same, and the inclined holes of the composite laser film in a vertical use state face the outside of the film and are inclined upwards; the composite laser film is further provided with a mark used for prompting the inclination direction of the inclined hole, and the requirement for weakening and shielding the colorful effect of the laser film in a short time can be met by spraying water on the surface of the composite laser film.

Description

Technical Field

[0001] This utility model belongs to the field of membrane product technology, specifically relating to a composite laser membrane with variable performance effects. Background Technology

[0002] Laser paper (also known as laser metallized paper) is made by molding laser holographic patterns or text signals onto the surface of metallized paper. It is a sheet material with unique luster and visual effects. This type of sheet material can present colorful changes under different angles and lighting conditions.

[0003] For example, patent document CN218879808U discloses a multilayer composite laser film, including a laser film layer, a hot melt adhesive layer, a release layer and a protective layer. The hot melt adhesive layer and the protective layer are respectively disposed on both sides of the laser film layer, and the release layer is disposed between the laser film layer and the protective layer for peeling off the protective layer. The protective layer includes a protective film layer and a water-absorbing layer, which are stacked and bonded to each other. The protective film layer faces the release layer, and the water-absorbing layer is used to absorb moisture.

[0004] The aforementioned existing technology not only retains the dazzling effect of laser paper, but also improves the material layer structure to protect the surface of the film material, prevent the hot melt adhesive backing from contacting the decorative surface of the film material, and achieve a certain degree of moisture-proof and drying effect, thus protecting and maintaining the surface properties of the film material.

[0005] Having cultivated the paper film product industry for many years, the applicant has gathered feedback and suggestions from downstream distributors, revealing that: some entertainment venues (such as KTVs and party rooms) like to use holographic paper for partial wall decoration, as its dazzling and varied effects can enhance the atmosphere. However, during weekdays, there are generally fewer orders for entertainment activities. To increase weekday daytime revenue, these venues may open their spaces as short-term meeting rooms, in which case the dazzling holographic paper is not a suitable choice for meeting room walls. On the other hand, some small European and American companies also set up entertainment rooms or party rooms when planning their office spaces and like to use holographic paper for partial wall decoration. However, there are also situations where the entertainment room or party room needs to be repurposed as a temporary meeting room.

[0006] Based on the above application scenarios of laser paper, it can be seen that there is room for improvement in this type of product. Therefore, this utility model aims to use existing film materials to design the layer structure, thereby providing a composite laser film whose performance effect can be changed as needed. Summary of the Invention

[0007] In view of the problems in the related technologies, this utility model proposes a composite laser film with variable performance to overcome the above-mentioned technical problems existing in the existing related technologies.

[0008] The technical solution of this utility model is implemented as follows:

[0009] A composite laser film with variable performance characteristics comprises, in sequence, a laser film, a transparent waterproof adhesive film, a first polyvinyl alcohol film (PVA film), a polyacrylic acid film (PAA film), and an outermost film;

[0010] The outermost membrane is a second polyvinyl alcohol membrane (PVA membrane) or an oblique-pore membrane;

[0011] A second polyvinyl alcohol film, serving as the outermost membrane, covers the polyacrylic acid film and is directly or indirectly laminated to the polyacrylic acid film.

[0012] The oblique-hole membrane, which is the outermost membrane, is bonded and fixed to the outer periphery by a cold-pressed adhesive frame. The oblique-hole membrane covers, contacts, but is not composite with the polyacrylic film. The oblique-hole membrane has several oblique holes that penetrate through itself. The polyacrylic film can communicate with the external environment through the oblique holes.

[0013] The inclined directions of several of the inclined holes are the same, and the composite laser film in the vertical use state has the inclined holes facing outward and inclined upward.

[0014] The composite laser film is also provided with a mark to indicate the tilt direction of the oblique hole.

[0015] The membrane materials used in this invention (such as polyvinyl alcohol membrane, polyacrylic acid membrane, etc.) are all existing membrane materials. This invention mainly utilizes the difference in water absorption between polyvinyl alcohol membrane and polyacrylic acid membrane to design the overall layer structure.

[0016] First, both polyvinyl alcohol (PVA) and polyacrylic acid (PA) films absorb water and swell, and are transparent before water absorption. Therefore, in a dry state, this invention can normally display the iridescent effect of the laser film, suitable for a party atmosphere. After absorbing water, the expansion rate of the PA film is higher than that of the PVA film. Therefore, due to the difference in expansion rates, internal stress is generated between the two films after water absorption, and microscopic wrinkles will form on the film surface. This appears to the naked eye as a reduction in the transparency of this invention, thereby weakening and obscuring the iridescent effect of the laser film, suitable for a relatively serious meeting atmosphere. After the water evaporates, the two films will shrink back, thereby reducing the difference in refractive index and restoring the transparent state without obscuring the iridescent effect.

[0017] In other words, this invention can meet the need for short-term reduction and obscuring of the iridescent effect of laser film, and is suitable for entertainment venues and company entertainment rooms that occasionally need to be used as short-term meeting rooms. Simply spray the outer surface of this invention with a spray bottle, and the transparency of the polyvinyl alcohol film and polyacrylic acid film located on the outer side of the laser film will decrease, thereby reducing and blocking light from entering the laser film, thus reducing and obscuring the iridescent effect of the laser film. The iridescent appearance can be restored after artificial or natural drying.

[0018] Secondly, considering the problem of easy peeling of polyacrylic acid film, this utility model sets an outermost layer on the outside of polyacrylic acid film to prevent peeling and provide protection. If the second polyvinyl alcohol film is used as the outermost layer, the process is relatively simple, mainly involving coating and drying. However, the response to becoming opaque after water spraying is relatively slow, requiring the outermost second polyvinyl alcohol film to absorb water and swell before the water penetrates into the polyacrylic acid film and the first polyvinyl alcohol film. If the oblique hole membrane is used as the outermost layer, the response speed after water spraying is relatively fast, so water enters through the oblique holes and directly contacts the polyacrylic acid film and the first polyvinyl alcohol film. However, the production cost is relatively high, requiring the preparation of the oblique hole membrane.

[0019] Furthermore, considering that if the oblique-hole membrane is used as the outermost layer, the polyacrylic acid membrane needs to be in contact with water as much as possible, it is designed with oblique holes. When water is sprayed, the oblique holes, relative to the transverse straight holes, can intercept a certain amount of water through the slope for the polyacrylic acid membrane and polyvinyl alcohol membrane to absorb and swell. At the same time, the oblique-hole membrane is not combined with the polyacrylic acid membrane, which is conducive to the spread and flow of water inside the oblique-hole membrane, and improves the response change of reducing transparency.

[0020] Finally, to achieve the function of intercepting water flow through the inclined hole, the bonding direction of this utility model needs to be specifically defined. Therefore, a mark indicating the installation direction is designed to ensure that the inclined hole faces upward after installation.

[0021] The oblique-hole membrane can be implemented in various ways, such as designing membrane templates with corresponding shapes and angles, which will not be elaborated here. Those skilled in the art can design it as needed. It should also be noted that the reduction in transparency of the utility model does not need to be excessively pursued to become completely white. Essentially, it is sufficient to partially obscure the iridescent effect. The patterns or geometric designs that show through the laser film will appear as simple wall decorations.

[0022] Preferably, the polyacrylic film has a number of nano-silica particles evenly distributed inside, which improves the structural strength of the polyacrylic film and enhances the light scattering after the polyacrylic film swells. The nano-silica particles will form dynamic scattering centers in the swollen polyacrylic film, which improves the covering effect of the laser film's iridescent effect after water spraying.

[0023] Specifically, the amount of the nano-silica particles per unit area relative to the polyacrylic acid film is 4-6 wt%, and the particle size of the nano-silica particles is 65-95 nm.

[0024] Preferably, a thin layer of borax is provided between the first polyvinyl alcohol film and the polyacrylic acid film; a thin layer of borax is provided between the second polyvinyl alcohol film and the polyacrylic acid film, and the second polyvinyl alcohol film is indirectly laminated to the polyacrylic acid film.

[0025] The aforementioned borax thin layer is a cross-linking agent, which can improve the bonding force between the polyacrylic acid film and the polyvinyl alcohol film and reduce the risk of delamination. It can be formed by applying borax solution and drying.

[0026] Preferably, the inclination angle of the oblique hole forms an angle of 30 to 45° with the horizontal plane. Compared with other angles, the oblique hole membrane at this angle is less difficult to produce and can retain more water.

[0027] Preferably, the thickness of the polyacrylic film is ≤10μm. If the film is too thick, the response speed of the decrease in transparency after water spraying will be relatively slow.

[0028] Preferably, the thickness of the second polyvinyl alcohol film is ≤1μm. The film layer is designed to protect the polyacrylic acid film from peeling off. There is no need to pursue excessive thickness. Excessive thickness will affect the water seepage speed, and will also lead to a relatively slow response speed of the decrease in transparency after water spraying.

[0029] Preferably, the thickness of the first polyvinyl alcohol film is 30-45 μm. A thickness greater than 45 μm may cause the wrinkles of the polyacrylic acid film to be irrecoverable, which contradicts the design of the present invention that allows the film to be restored to transparency after drying.

[0030] Preferably, the first surface of the composite laser film is sequentially provided with the transparent waterproof adhesive film, the first polyvinyl alcohol film, the polyacrylic acid film, and the outermost film, while the second surface is sequentially provided with a cold-pressed adhesive film and a flexible cushioning layer. If the laser film is subjected to external impact and creases appear, these will be very noticeable and negatively affect the display of the iridescent effect. Therefore, the flexible cushioning layer is designed to buffer external forces and minimize crease formation, regardless of whether the product is rolled up and unused or already adhered to the wall. There are no special restrictions on the preparation of the flexible cushioning layer; a soft, resilient adhesive can be used.

[0031] The inner and outer surfaces of the flexible rubber buffer layer are continuous serrated or wavy. The height difference of the serrated or wavy structure is less than the thickness of the cold-pressed adhesive film, which increases the contact area with the cold-pressed adhesive film and makes the composite firm.

[0032] Preferably, the cold-pressed adhesive frame is a closed ring shape. The portion of the cold-pressed adhesive frame near the outer periphery is bonded to the cold-pressed adhesive film, and the portion near the inner periphery is bonded to the polyacrylic film. The composite pressing of part of the cold-pressed adhesive frame with the homogeneous cold-pressed adhesive film makes it more secure, and the structural layers are less likely to delaminate or peel off.

[0033] Preferably, it also includes a transparent protective film, which can be peeled off and covered or adhered to the outer surface of the outermost film. The transparent protective film has markings on both sides indicating the tilt direction of the oblique holes. The transparent protective film protects the outer surface of the present invention before use and prevents it from sticking when rolled. The transparent design and the markings on both sides do not affect the viewing of the colorful effect when displayed for sale. The markings on the transparent protective film can serve as a reminder and can be taken away with the transparent protective film after installation.

[0034] In actual production, there are no special restrictions on the transparent protective film, as long as it can be printed or pasted with arrow marks and has high transparency, such as transparent electrostatic film, industrial PE film, etc. Attached Figure Description

[0035] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0036] Figure 2 This is the second structural schematic diagram of the present invention;

[0037] Figure 3 This is a partial structural cross-sectional schematic diagram of Embodiment 1 of this utility model;

[0038] Figure 4 This is a partial cross-sectional schematic diagram of the inclined hole containing water in Embodiment 1 of this utility model;

[0039] Figure 5 This is a partial structural cross-sectional schematic diagram of Embodiment 2 of this utility model.

[0040] Marker explanation:

[0041] 1. Transparent protective film; 101. Marking;

[0042] 2. Oblique-pore membrane; 201. Oblique pore;

[0043] 3. Cold-pressed glue frame;

[0044] 4. Polyacrylic acid film; 401. Nano silica particles;

[0045] 5. Thin layer of borax;

[0046] 6. First polyvinyl alcohol film;

[0047] 7. Transparent waterproof film;

[0048] 8. Laser film;

[0049] 9. Cold pressing adhesive film;

[0050] 10. Soft rubber cushioning layer;

[0051] 11. Second polyvinyl alcohol film. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0054] Example 1

[0055] like Figures 1 to 4 As shown, a composite laser film with variable performance includes, in sequence, a laser film 8, a transparent waterproof adhesive film 7, a first polyvinyl alcohol film 6 (PVA film), a polyacrylic acid film 4 (PAA film), and an outermost film.

[0056] The outermost membrane is an oblique-pore membrane 2;

[0057] The oblique-hole membrane 2, which is the outermost membrane, is bonded and fixed to the outer periphery by a cold-pressed adhesive frame 3. The oblique-hole membrane 2 covers, contacts, but is not composite with the polyacrylic film 4. The oblique-hole membrane 2 has a number of oblique holes 201 that penetrate through itself. The polyacrylic film 4 can communicate with the external environment through the oblique holes 201.

[0058] Reference Figure 3 The inclined directions of several of the inclined holes 201 are the same, and the composite laser film 8 in the vertical use state has the inclined holes 201 facing outward and inclined upward.

[0059] The composite laser film 8 is also provided with a mark 101 for indicating the tilt direction of the oblique hole 201.

[0060] In this embodiment, a number of nano-silica particles 401 are uniformly distributed within the polyacrylic film 4. The amount of nano-silica particles 401 per unit area relative to the polyacrylic film 4 is 4 to 6 wt%, and the particle size of the nano-silica particles is 65 to 95 nm.

[0061] In this embodiment, a thin layer of borax 5 is provided between the first polyvinyl alcohol film 6 and the polyacrylic acid film 4, which is formed by applying and drying a borax solution.

[0062] In this embodiment, the inclined angle of the inclined hole 201 forms an angle θ of 30 to 45° with the horizontal plane. Compared with other angles, this angle is less difficult to produce and can retain more water.

[0063] In this embodiment, the thickness of the polyacrylic film 4 is ≤10μm. If the thickness is too large, the response speed of whitening after water spraying will be relatively slow.

[0064] In this embodiment, the thickness of the first polyvinyl alcohol film 6 is 30-45 μm. A thickness greater than 45 μm may cause the wrinkles of the polypropylene film to become irreversible, which contradicts the reversible design of this utility model.

[0065] In this embodiment, the first surface of the composite laser film 8 is sequentially provided with the transparent waterproof adhesive film 7, the first polyvinyl alcohol film 6, the polyacrylic acid film 4 and the outermost film, and the second surface is sequentially provided with the cold-pressed adhesive film 9 and the flexible buffer layer 10.

[0066] The inner and outer surfaces of the flexible rubber buffer layer 10 are continuously serrated. The height difference of the serrated structure is less than the thickness of the cold-pressed adhesive film 9, which increases the contact area with the cold-pressed adhesive film 9 and makes the composite firm.

[0067] Reference Figure 3 In this embodiment, the cold-pressed adhesive frame 3 is a closed ring. The cold-pressed adhesive frame 3 is bonded to the cold-pressed adhesive film 9 near the outer periphery and to the polyacrylic film 4 near the inner periphery. The composite bonding of part of the cold-pressed adhesive frame 3 with the homogeneous cold-pressed adhesive film 9 makes it more secure, and the structural layers are less likely to delaminate or peel off.

[0068] In this embodiment, a transparent protective film 1 (transparent electrostatic film) is also included. The transparent protective film 1 can be peeled off and covered or adhered to the outer surface of the outermost film. Marks 101 (arrow marks) indicating the tilt direction of the oblique hole 201 are provided on both sides of the transparent protective film 1.

[0069] Example 2

[0070] like Figure 1 , Figure 2 and Figure 5As shown, a composite laser film with variable performance includes, in sequence, a laser film 8, a transparent waterproof adhesive film 7, a first polyvinyl alcohol film 6 (PVA film), a polyacrylic acid film 4 (PAA film), and an outermost film.

[0071] The outermost membrane is a second polyvinyl alcohol membrane 11 (PVA membrane).

[0072] The second polyvinyl alcohol film 11, which serves as the outermost membrane, covers the polyacrylic acid film 4 and is directly or indirectly laminated to the polyacrylic acid film 4.

[0073] In this embodiment, a number of nano-silica particles 401 are uniformly distributed within the polyacrylic film 4. The amount of nano-silica particles 401 per unit area relative to the polyacrylic film 4 is 4 to 6 wt%, and the particle size of the nano-silica particles is 65 to 95 nm.

[0074] In this embodiment, a borax thin layer 5 is provided between the first polyvinyl alcohol film 6 and the polyacrylic acid film 4; a borax thin layer 5 is also provided between the second polyvinyl alcohol film 11 and the polyacrylic acid film 4, and the second polyvinyl alcohol film 11 is indirectly laminated to the polyacrylic acid film 4.

[0075] In this embodiment, the thickness of the polyacrylic film 4 is ≤10μm. If the thickness is too large, the response speed of whitening after water spraying will be relatively slow.

[0076] In this embodiment, the thickness of the first polyvinyl alcohol film 6 is 30-45 μm. A thickness greater than 45 μm may cause the wrinkles of the polypropylene film to become irreversible, which contradicts the reversible design of this utility model.

[0077] In this embodiment, the thickness of the second polyvinyl alcohol film 11 is ≤1μm. The film layer is designed to protect the polyacrylic acid film 4 from peeling off. There is no need to pursue excessive thickness. Excessive thickness will affect the water seepage speed and thus lead to a relatively slow response speed of whitening after water spraying.

[0078] In this embodiment, the first surface of the composite laser film 8 is sequentially provided with the transparent waterproof adhesive film 7, the first polyvinyl alcohol film 6, the polyacrylic acid film 4 and the outermost film, and the second surface is sequentially provided with the cold-pressed adhesive film 9 and the flexible buffer layer 10.

[0079] The inner and outer surfaces of the flexible rubber buffer layer 10 are continuously wavy. The height difference of the wavy structure is less than the thickness of the cold-pressed adhesive film 9, which increases the contact area with the cold-pressed adhesive film 9 and makes the composite firm.

[0080] In this embodiment, a transparent protective film 1 (transparent industrial PE film) is also included, which can be peeled off and covered or adhered to the outer surface of the outermost film.

[0081] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A composite laser film with variable performance characteristics, characterized in that, It consists of, in sequence, a laser film, a transparent waterproof film, a first polyvinyl alcohol film, a polyacrylic acid film, and an outermost film; The outermost membrane is a second polyvinyl alcohol membrane or an oblique-pore membrane; A second polyvinyl alcohol film, serving as the outermost membrane, covers the polyacrylic acid film and is directly or indirectly laminated to the polyacrylic acid film. The oblique-hole membrane, which is the outermost membrane, is bonded and fixed to the outer periphery by a cold-pressed adhesive frame. The oblique-hole membrane covers, contacts, but is not composite with the polyacrylic film. The oblique-hole membrane has several oblique holes that penetrate through itself. The polyacrylic film can communicate with the external environment through the oblique holes. The inclined directions of several of the inclined holes are the same, and the composite laser film in the vertical use state has the inclined holes facing outward and inclined upward. The composite laser film is also provided with a mark to indicate the tilt direction of the oblique hole.

2. The composite laser film with variable performance according to claim 1, characterized in that, The polyacrylic acid film contains a number of nano-silica particles that are uniformly distributed within it. The amount of the nano-silica particles relative to the unit area of ​​the polyacrylic acid film is 4-6 wt%, and the particle size of the nano-silica particles is 65-95 nm.

3. The composite laser film with variable performance according to claim 1 or 2, characterized in that, A thin layer of borax is provided between the first polyvinyl alcohol film and the polyacrylic acid film; A thin layer of borax is provided between the second polyvinyl alcohol film and the polyacrylic acid film, and the second polyvinyl alcohol film is indirectly laminated to the polyacrylic acid film.

4. The composite laser film with variable performance according to claim 1 or 2, characterized in that, The inclination angle of the inclined hole forms an angle of 30 to 45° with the horizontal plane.

5. The composite laser film with variable performance according to claim 1 or 2, characterized in that, The thickness of the polyacrylic film is ≤10μm.

6. The composite laser film with variable performance according to claim 1 or 2, characterized in that, The thickness of the second polyvinyl alcohol film is ≤1μm.

7. The composite laser film with variable performance according to claim 1 or 2, characterized in that, The thickness of the first polyvinyl alcohol film is 30–45 μm.

8. The composite laser film with variable performance according to claim 1 or 2, characterized in that, The first surface of the composite laser film is sequentially provided with the transparent waterproof adhesive film, the polyvinyl alcohol film, the first polyacrylic acid film and the outermost film, and the second surface is sequentially provided with the cold-pressed adhesive film and the soft rubber buffer layer. The inner and outer surfaces of the flexible rubber buffer layer have a continuous serrated or wavy structure, and the height difference of the serrated or wavy structure is less than the thickness of the cold-pressed adhesive film.

9. The composite laser film with variable performance according to claim 8, characterized in that, The cold-pressed adhesive frame is a closed ring. The portion of the cold-pressed adhesive frame near the outer periphery is bonded to the cold-pressed adhesive film, and the portion near the inner periphery is bonded to the polyacrylic film.

10. The composite laser film with variable performance according to claim 1 or 2, characterized in that, It also includes a transparent protective film, which can be peeled off and adhered to the outer surface of the outermost film, and the transparent protective film has markings on both sides indicating the tilt direction of the oblique hole.

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