Gradient color window film structure

Abstract

The utility model relates to a gradient color window film structure, which comprises a base material layer, a transparent film layer and a transparent film layer, the mounting adhesive layer is arranged on the lower surface of the base material layer and is used for adhering the gradient color window film to a window surface; the release film layer is detachably attached to the lower surface of the mounting adhesive layer and used for protecting the mounting adhesive layer; the wear-resistant layer is arranged on the upper surface of the base material layer and is used for protecting the window film; a dye layer is attached to the surface of the base material layer, two opposite edges of the base material layer in the width direction are defined as a first edge and a second edge respectively, and the number of dye molecules in the dye layer is gradually reduced in the direction from the first edge to the second edge, so that the base material layer forms a gradient color base material layer. According to the window film disclosed by the utility model, the window film is endowed with color characteristics only by attaching the dye layer on the base material layer, the whole structure is simple, the thickness of the film is hardly changed, and good light transmission uniformity is maintained on the basis that the dye layer is easy to obtain.

Description

Technical Field

[0001] The utility model relates to the technical field of films, in particular to a gradient color window film structure. Background Art

[0002] Currently, various types of films are widely used in the market. This also includes gradient color films. Currently, such films are generally produced using a magnetron sputtering coating process, which produces an effect of gradually changing from one color to another or multiple colors. For example, Chinese patent CN113403593B "Gradient Color Film and Its Preparation Method and Application" magnetron sputters a film layer with a gradient thickness onto a film substrate, and obtains a gradient color effect based on the principle of optical interference. Chinese patent application CN112048699A "A Method for Preparing a Gradient PET Film" coats a material layer with a refractive index on a PET film, and the material layer is composed of alternating layers of high and low refractive index materials, thereby producing a gradient color effect by refraction of light.

[0003] The gradient color effect of the above-mentioned gradient window film is formed by refraction of light under the premise that the film itself has a special structure, and cannot be formed by dyeing alone, which leads to a complex structure of the film. Moreover, due to the limitation of the film structure, the dyeing uniformity is poor, which affects the uniformity of light transmission.

[0004] Therefore, the structure of the current gradient color film needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gradient color window film structure with simple structure and good light transmission uniformity in view of the current status of the existing technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A gradient color window film structure, comprising:

[0008] The substrate layer is a light-transmitting film;

[0009] An adhesive layer is installed on the lower surface of the substrate layer and is used to stick the gradient window film on the window surface;

[0010] a release film layer, detachably attached to the lower surface of the mounting adhesive layer, for protecting the mounting adhesive layer;

[0011] a wear-resistant layer, provided on the upper surface of the substrate layer, for protecting the window film;

[0012] A dye layer is attached to the surface of the substrate layer, and the two opposite edges of the substrate layer in the width direction are defined as a first edge and a second edge. From the first edge to the second edge, the number of dye molecules in the dye layer gradually decreases, thereby forming a gradient color substrate layer.

[0013] Preferably, the surface of the substrate layer is provided with a plurality of pits that can improve the adhesion of the dye layer. The pits can be formed by corona treatment, which is beneficial to improving the adhesion of the dye layer to the substrate layer, improving the dyeing effect of the dye molecules and the stability of the gradient color structure.

[0014] More preferably, the density of the pits on the substrate layer gradually decreases from the first edge toward the second edge. The trend of the pit density change is consistent with the trend of the number of dye molecules. This change in pit density facilitates or assists in enhancing the adhesion of a corresponding number of dye molecules to the substrate layer, thereby further improving the dyeing effect of the dye molecules and the stability of the gradient color structure.

[0015] Preferably, the substrate layer is provided with a plurality of recessed holes on its surface to enhance the adhesion of the mounting adhesive layer. These recessed holes, like the aforementioned pits, can be obtained by corona treatment to enhance the grip of the mounting adhesive layer, thereby improving the stability and reliability of the installation between the window film adhesive layers.

[0016] In the present invention, the density of the recessed holes throughout the substrate layer can be uniformly or randomly distributed. Since the recessed holes are provided solely to enhance the gripping force of the mounting adhesive layer, and do not require increasing (or increasing in a gradient) the specific surface area to capture varying numbers of dye molecules, the recessed holes can be distributed uniformly or randomly, with a uniform distribution likely to provide a better result than a random distribution.

[0017] Preferably, the gradient tint window film further includes a composite adhesive layer and a functional layer. The composite adhesive layer is disposed on the upper surface of the substrate layer, the functional layer is adhered to the upper surface of the composite adhesive layer, and the wear-resistant layer is disposed on the functional layer. The functional layer is at least one of a carbon black layer, a privacy layer, and a thermal insulation layer. The selection of the functional layers can be adjusted based on production needs to meet the demands of a wider range of consumers.

[0018] Compared with the prior art, the advantages of the present invention are: the window film of the present invention is given color characteristics only by attaching a dye layer on the substrate layer, and the gradient color effect is achieved by setting the gradient change of the number of dye molecules in the dye layer, and the overall structure is simple; at the same time, because the dye layer relies on dye molecules to develop color instead of relying on the refraction of light, the thickness of the film of the present invention hardly changes, and on the basis of easily obtaining the dye layer, good light transmittance uniformity is maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the gradient color window film in Example 1 of the present utility model;

[0020] Figure 2 This is a schematic structural diagram of the substrate layer and the dye layer in Example 1 of the present invention.

[0021] Figure 3 This is a diagram showing the distribution pattern of pits on the substrate layer in Example 1 of the present utility model. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0023] Example 1:

[0024] like Figure 1 、 2 As shown in , 3 , the gradient color window film structure of this embodiment includes a substrate layer 1 , a mounting adhesive layer 2 , a release film layer 3 , a wear-resistant layer 4 , a composite adhesive layer 5 and a functional layer 6 .

[0025] The substrate layer 1 is a light-transmitting film, such as a PET film. The mounting adhesive layer 2 is disposed on the lower surface of the substrate layer 1 and is used to adhere the gradient window film to the window surface. The release film layer 3 is removably attached to the lower surface of the mounting adhesive layer 2 to protect it. A composite adhesive layer 5 is disposed on the upper surface of the substrate layer 1, a functional layer 6 is attached to the upper surface of the composite adhesive layer 5, and a wear-resistant layer 4 is disposed on the functional layer 6 to protect the window film.

[0026] A dye layer 7 is attached to the surface of the substrate layer 1. This dye layer 7 is formed directly on the substrate layer 1 using a dye solution. Typically, the dyeing is performed on both sides of the substrate layer 1, but single-side dyeing is also possible. The two opposing edges of the substrate layer 1 in the width direction are defined as a first edge 11 and a second edge 12. The number of dye molecules 71 in the dye layer 7 gradually decreases from the first edge 11 toward the second edge 12, resulting in a gradient color formation of the substrate layer 1.

[0027] It should be further explained that the first edge 11 and the second edge 12 are not limited to the actual edges of the substrate layer 1, but may also be a portion of the substrate layer 1, with two opposite edges of the portion constituting the first edge and the second edge.

[0028] The functional layer 6 is at least one of a carbon black layer, a privacy layer, and a heat-insulating layer. The selection of the functional layer 6 can be adjusted according to production needs to meet the needs of more consumers.

[0029] In this embodiment, the surface of the substrate layer 1 is provided with a plurality of pits 100 that enhance the adhesion of the dye layer. These pits 100 can be formed through corona treatment, which helps improve the adhesion of the dye layer 7 to the substrate layer 1, enhancing the dyeing effect of the dye molecules and the stability of the gradient color structure. Furthermore, the density of the pits 100 on the substrate layer 1 gradually decreases from the first edge 11 to the second edge 12. The density variation trend of the pits 100 is consistent with the variation trend of the number of dye molecules. The change in the density of the pits 100 helps achieve or assist in enhancing the adhesion of a corresponding number of dye molecules to the substrate layer 1, further improving the dyeing effect of the dye molecules and the stability of the gradient color structure.

[0030] It should be noted that since the pits 100 in this embodiment are obtained by corona treatment, and the film itself has a certain elasticity and restoring force, the window film product appears to have a large pit depth when it is completed or shipped. As time goes by, the pit depth gradually decreases or even disappears.

[0031] The window film of this embodiment is given color characteristics only by attaching a dye layer 7 to the substrate layer 1, and the gradient color effect is achieved by setting a gradient change in the number of dye molecules 71 in the dye layer 7. The overall structure is simple. At the same time, since the dye layer 7 relies on the dye molecules 71 to develop color instead of relying on the refraction of light, the thickness of the film of this embodiment hardly changes. On the basis of easily obtaining the dye layer 7, good light transmittance uniformity is maintained.

[0032] Example 2:

[0033] The difference between this embodiment and embodiment 1 is that:

[0034] The surface of the substrate layer 1 is provided with a plurality of recessed holes that can improve the adhesion of the mounting adhesive layer 2. These recessed holes, like the pits in Example 1, can be obtained by corona treatment to improve the grip of the mounting adhesive layer, thereby improving the installation stability and reliability between the window film adhesive layers.

[0035] In this embodiment, the density of the recessed holes in the substrate layer 1 is uniformly or randomly distributed. Since the recessed holes are provided only to improve the gripping force of the mounting adhesive layer, and there is no need to increase the specific surface area (or further increase it in a gradient) to capture different numbers of dye molecules, the recessed holes can be distributed uniformly or randomly. Of course, the effect of uniform distribution may be better than random distribution.

[0036] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A gradient color window film structure, comprising: The substrate layer is a light-transmitting film; An adhesive layer is installed on the lower surface of the substrate layer and is used to stick the gradient window film on the window surface; a release film layer, detachably attached to the lower surface of the mounting adhesive layer, for protecting the mounting adhesive layer; a wear-resistant layer, provided on the upper surface of the substrate layer, for protecting the window film; It is characterized in that: a dye layer is attached to the surface of the substrate layer, and the two opposite edges of the substrate layer in the width direction are defined as a first edge and a second edge respectively. From the first edge to the second edge, the number of dye molecules in the dye layer gradually decreases, thereby forming a gradient color substrate layer.

2. The gradient color window film structure according to claim 1, characterized in that: The surface of the substrate layer is provided with a plurality of pits which can improve the adhesion of the dye layer.

3. The gradient color window film structure according to claim 2, characterized in that: The density of the pits on the substrate layer gradually decreases from the first edge to the second edge.

4. The gradient color window film structure according to claim 1, characterized in that: The surface of the base material layer is provided with a plurality of concave holes which can improve the adhesion of the mounting adhesive layer.

5. The gradient color window film structure according to claim 4, characterized in that: The density of the concave holes in various locations of the substrate layer is uniformly distributed or randomly distributed.

6. The gradient color window film structure according to any one of claims 1 to 5, characterized in that: It also includes a composite adhesive layer and a functional layer. The composite adhesive layer is arranged on the upper surface of the base material layer, the functional layer is attached to the upper surface of the composite adhesive layer, and the wear-resistant layer is arranged on the functional layer.

7. The gradient color window film structure according to claim 6, characterized in that: The functional layer is at least one of a carbon black layer, an anti-peep layer, and a heat insulation layer.

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