Anti-aging window film

Abstract

The utility model discloses an anti-aging window film which comprises a first composite base material layer, a second composite base material layer and a third composite base material layer, the second composite base material layer is formed by co-extruding at least two layers; the first connecting adhesive layer is clamped between the first composite base material layer and the second composite base material layer; the mounting adhesive layer is arranged on the surface, far away from the first composite base material layer, of the second composite base material layer; the first composite base material layer and / or the second composite base material layer comprise / comprises an anti-aging unit layer; and the first composite base material layer is in concave-convex fit with the first connecting adhesive layer. The anti-aging window film is reasonable in structure, the first composite base material layer and the second composite base material layer are co-extruded films, the layer thickness of the anti-aging unit layer can be adjusted, then the usage amount of functional auxiliaries is controlled, the precipitation problem of the functional auxiliaries is solved, and the optical performance of the window film is adjusted; the first connecting adhesive layer is in concave-convex fit with the first composite base material layer, so that the contact area between the two layers is increased, and the problem that the adhesive is easy to delaminate is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of window films, in particular to an anti-aging window film. Background Art

[0002] Window films are widely used in the automotive and architectural fields. Window films are peeled off and are in direct contact with the outside air. They are exposed to sunlight, wind and rain. Therefore, high mechanical properties and durability are required.

[0003] The prior art CN217863189U discloses a highly transparent and anti-aging colored window film, comprising a substrate core layer, wherein one surface of the substrate core layer is connected to the outer surface layer through a first functional layer, and the other surface is connected to the inner surface layer through a second functional layer, and a color functional layer is arranged between the substrate core layer and the first functional layer and / or between the substrate core layer and the second functional layer. Although the obtained colored window film has excellent anti-aging performance, multi-layer co-extrusion has high requirements on equipment, and multi-layer co-extrusion has great difficulty in controlling layer thickness, and thus has great difficulty in adjusting the distribution uniformity and haze of functional masterbatch.

[0004] Therefore, it is necessary to improve the window film in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects existing in the prior art and provide an anti-aging window film. The first composite substrate layer and the second composite substrate layer are co-extruded films, which can adjust the layer thickness of the anti-aging unit layer, thereby controlling the usage of the functional additive and solving its precipitation problem, and adjusting the optical properties of the window film; the first connecting adhesive layer and the first composite substrate layer are matched in a concave-convex manner to increase the contact area between the two layers, effectively solving the problem of easy delamination of the adhesive.

[0006] In order to achieve the above technical effects, the technical solution of the utility model is: an anti-aging window film, comprising:

[0007] The first composite substrate layer is co-extruded with at least two layers;

[0008] The second composite substrate layer is co-extruded with at least two layers;

[0009] A first connecting adhesive layer, sandwiched between the first composite substrate layer and the second composite substrate layer;

[0010] An installation adhesive layer is disposed on a surface of the second composite substrate layer away from the first composite substrate layer;

[0011] The first composite substrate layer and / or the second composite substrate layer comprises an anti-aging unit layer;

[0012] The first composite substrate layer and the first connecting adhesive layer are matched in a concave-convex manner.

[0013] A preferred technical solution is that the first composite substrate layer and / or the second composite substrate layer includes an anti-ultraviolet unit layer.

[0014] A preferred technical solution is that the first composite substrate layer is a first substrate unit layer / a second substrate unit layer, or a stacked structure of a first substrate unit layer / a second substrate unit layer / a first substrate unit layer; the second composite substrate layer is a third substrate unit layer / a fourth substrate unit layer, or a stacked structure of a third substrate unit layer / a fourth substrate unit layer / a third substrate unit layer;

[0015] The thickness of the first substrate unit layer is smaller than the thickness of the second substrate unit layer;

[0016] The thickness of the third substrate unit layer is smaller than the thickness of the fourth substrate unit layer.

[0017] A preferred technical solution is that the first substrate unit layer and / or the third substrate unit layer is one of an anti-aging unit layer and an anti-ultraviolet unit layer.

[0018] A preferred technical solution is that a wear-resistant hardened layer is provided on the surface of the first composite substrate layer away from the second composite substrate layer.

[0019] A preferred technical solution is that it also includes a third composite substrate layer, which is sandwiched between the first composite substrate layer and the second composite substrate layer, or is arranged between the second composite substrate layer and the installation adhesive layer, and the third composite substrate layer is connected to the second composite substrate layer through a second connecting adhesive layer.

[0020] A preferred technical solution is that one of the first connecting adhesive layer and the second connecting adhesive layer is a colored acrylic pressure-sensitive adhesive, and the other is a heat-insulating adhesive.

[0021] A preferred technical solution is that the main materials of the first composite substrate layer, the second composite substrate layer and the third composite substrate layer are all polyethylene terephthalate.

[0022] A preferred technical solution is that a surface of the second composite substrate layer facing the first composite substrate layer is provided with an anti-reflection recessed portion, or a surface of the third composite substrate layer facing the first composite substrate layer is provided with an anti-reflection recessed portion.

[0023] A preferred technical solution is that an antistatic release film is provided on the surface of the mounting adhesive layer.

[0024] The advantages and beneficial effects of the utility model are:

[0025] The anti-aging window film has a reasonable structure. Through the first composite substrate layer and the second composite substrate layer of more than two co-extruded films, the thickness of one unit layer can be adjusted and set as the anti-aging unit layer, which not only reduces the usage of functional additives and the precipitation problem, but also optimizes the influence of the anti-aging unit layer on the optical properties of the window film; the first connecting adhesive layer and the first composite substrate layer are matched with each other in a concave-convex manner to increase the contact area between the two layers, effectively solving the problem of easy delamination of the adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of Embodiment 1 of the anti-aging window film of the utility model;

[0027] Figure 2 It is a structural schematic diagram of Embodiment 2 of the anti-aging window film of the utility model;

[0028] Figure 3 It is a structural schematic diagram of Embodiment 3 of the anti-aging window film of the utility model;

[0029] Figure 4 It is a structural schematic diagram of Embodiment 4 of the anti-aging window film of the utility model;

[0030] Figure 5 yes Figure 4 A partial enlarged view of middle A.

[0031] In the figure: 1. first composite substrate layer; 2. second composite substrate layer; 3. third composite substrate layer; 4. wear-resistant hardened layer; 5. antistatic release film; 11. first substrate unit layer; 12. second substrate unit layer; 23. third substrate unit layer; 24. fourth substrate unit layer; 100. anti-reflection recess; 200. mounting adhesive layer; 201. first connecting adhesive layer; 202. second connecting adhesive layer. DETAILED DESCRIPTION

[0032] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0033] The “surface” is based on the normal use state of the anti-aging window film and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0034] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0035] like Figures 1 to 5 As shown, the anti-aging window film includes a first composite substrate layer 1, a second composite substrate layer 2, a first connecting adhesive layer 201 and an installation adhesive layer 200, wherein the first composite substrate layer 1 is co-extruded with at least two layers, the second composite substrate layer 2 is co-extruded with at least two layers, the first connecting adhesive layer 201 is sandwiched between the first composite substrate layer 1 and the second composite substrate layer 2, and the installation adhesive layer 200 is arranged on the surface of the second composite substrate layer 2 away from the first composite substrate layer 1; the first composite substrate layer 1 and the first connecting adhesive layer 201 are matched in a concave-convex manner, the first composite substrate layer 1 and / or the second composite substrate layer 2 include an anti-aging unit layer, and the first composite substrate layer 1 and / or the second composite substrate layer 2 include an anti-ultraviolet unit layer.

[0036] The first composite substrate layer 1 and the second composite substrate layer 2 are both co-extruded films with more than two layers. Therefore, by adjusting the thickness of one of the unit layers and setting it as an anti-aging unit layer or an anti-ultraviolet unit layer, not only the amount of functional additives used can be reduced, but also the effect of the anti-aging unit layer or the anti-ultraviolet unit layer on the optical properties of the window film can be optimized. The first composite substrate layer 1 and the second composite substrate layer 2 are connected by a first connecting adhesive layer 201. In order to prevent delamination, the first connecting adhesive layer 201 and the first composite substrate layer 1 are matched in a concave-convex manner to increase the contact area of ​​the two layers. One surface of the first composite substrate layer 1 is hot-pressed by a mold to obtain a concave-convex surface. Furthermore, the first connecting adhesive layer 201 is a high-temperature resistant acrylic pressure-sensitive adhesive, and the high-temperature resistance of the acrylic pressure-sensitive adhesive is improved by polymerizing a high-temperature resistant monomer.

[0037] like Figure 1 As shown, in some embodiments, the first composite substrate layer 1 is a stacked structure of a first substrate unit layer 11 / a second substrate unit layer 12, and the second composite substrate layer 2 is a stacked structure of a third substrate unit layer 23 / a fourth substrate unit layer 24, the thickness of the first substrate unit layer 11 is less than the thickness of the second substrate unit layer 12, and the thickness of the third substrate unit layer 23 is less than the thickness of the fourth substrate unit layer 24. Among them, one of the first substrate unit layer 11 and the third substrate unit layer 23 is an anti-ultraviolet unit layer, and the other is an anti-aging unit layer. In order to avoid the problem of masterbatch precipitation or damage in the anti-ultraviolet unit layer and the anti-aging unit layer, the first substrate unit layer 11 and the third substrate unit layer 23 are both arranged toward the first connecting adhesive layer 201.

[0038] In some embodiments, the first composite substrate layer 1 is a stacked structure of a first substrate unit layer 11 / a second substrate unit layer 12, and the second composite substrate layer 2 is a stacked structure of a third substrate unit layer 23 / a fourth substrate unit layer 24 / a third substrate unit layer 23, the thickness of the first substrate unit layer 11 is less than the thickness of the second substrate unit layer 12, and the thickness of the third substrate unit layer 23 is less than the thickness of the fourth substrate unit layer 24. Among them, the first substrate unit layer 11 is an anti-ultraviolet unit layer; one of the third substrate unit layers 23 is an anti-aging unit layer, and the other is an anti-aging unit layer or an anti-ultraviolet unit layer. Further, the first substrate unit layer 11 is disposed toward the first connecting adhesive layer 201.

[0039] like Figure 2 As shown, in some embodiments, the first composite substrate layer 1 is a stacked structure of the first substrate unit layer 11 / the second substrate unit layer 12 / the first substrate unit layer 11, the second composite substrate layer 2 is a stacked structure of the third substrate unit layer 23 / the fourth substrate unit layer 24, the thickness of the first substrate unit layer 11 is less than the thickness of the second substrate unit layer 12, and the thickness of the third substrate unit layer 23 is less than the thickness of the fourth substrate unit layer 24. Among them, the third substrate unit layer 23 is an anti-aging unit layer, one of the first substrate unit layers 11 is an anti-aging unit layer, and the other is an anti-aging unit layer or an anti-ultraviolet unit layer. Further, the third substrate unit layer 23 is arranged toward the first connecting adhesive layer 201.

[0040] like Figure 3 As shown, in some embodiments, the first composite substrate layer 1 is a laminated structure of the first substrate unit layer 11 / the second substrate unit layer 12 / the first substrate unit layer 11, and the second composite substrate layer 2 is a laminated structure of the third substrate unit layer 23 / the fourth substrate unit layer 24 / the third substrate unit layer 23, the thickness of the first substrate unit layer 11 is less than the thickness of the second substrate unit layer 12, and the thickness of the third substrate unit layer 23 is less than the thickness of the fourth substrate unit layer 24. Further, one of the first substrate unit layers 11 is an anti-ultraviolet unit layer and the other is an anti-aging unit layer; one of the third substrate unit layers 23 is an anti-ultraviolet unit layer and the other is an anti-aging unit layer. That is, the first composite substrate layer 1 and the second composite substrate layer 2 are co-extruded through the same equipment, and then the two are glued together, which not only realizes the preparation of a multifunctional window film, but also simplifies the production process.

[0041] The surface of the first composite substrate layer 1 away from the second composite substrate layer 2 is provided with a wear-resistant hardened layer 4. The wear-resistant hardened layer increases the hardness of the window film surface, effectively prevents wear and scratches during daily cleaning and maintenance, and keeps the surface of the window film smooth and beautiful; it can resist damage to the window film caused by external factors such as sand and stone splashing, tree branches scratching, etc., and protect the film surface from damage; by reducing surface damage, it helps to extend the overall service life of the window film and reduce the frequency of replacement, which is more economical in the long run; the hardened surface is usually smoother, not easy to be stained with dust and stains, and it is easier to remove stains during cleaning, without the need to use strong detergents, reducing the possible chemical damage to the window film; reducing the blurred vision caused by surface scratches, which is particularly important for occasions where good vision needs to be maintained (such as the front windshield of a car) to ensure driving safety; it can also give the wear-resistant hardened layer anti-static properties, thereby reducing dust adsorption and maintaining the cleanliness of the window film surface. Further, the raw materials of the wear-resistant hardened layer include ethyl ester solvent, toluene solvent, hardening liquid and curing agent.

[0042] In order to improve the mechanical properties of the window film, the window film further includes a third composite substrate layer 3. In some embodiments, the third composite substrate layer 3 is sandwiched between the first composite substrate layer 1 and the second composite substrate layer 2; Figure 4 As shown, in another embodiment, the third composite substrate layer 3 is disposed between the second composite substrate layer 2 and the mounting adhesive layer 200. The third composite substrate layer 3 is connected to the second composite substrate layer 2 via the second connecting adhesive layer 202. The third composite substrate layer 3 may be a single layer, two layers co-extruded or three layers co-extruded, and the third composite substrate layer 3 may be one of the first composite substrate layer 1 and the second composite substrate layer 2, and the composite is performed to obtain a high-strength window film.

[0043] The transparent window film is suitable for the front windshield of the car. In order to be suitable for the side windshield of the car, one of the first connecting adhesive layer 201 and the second connecting adhesive layer 202 is a colored acrylic pressure-sensitive adhesive, and the other is a heat-insulating adhesive. The heat-insulating adhesive includes acrylate, nano-cesium tungsten bronze powder, a curing agent and a solvent. The first connecting adhesive layer 201 and the second connecting adhesive layer 202 are both made of acrylic adhesive, which not only has adjustable adhesion and improves the connection firmness, but also has excellent optical properties.

[0044] The main materials of the first composite substrate layer 1, the second composite substrate layer 2 and the third composite substrate layer 3 are all polyethylene terephthalate. Polyethylene terephthalate has good transparency, which enables the window film to maintain good light transmittance, does not affect indoor lighting, and maintains a clear field of vision; it also has high mechanical strength and rigidity, good wear resistance, can resist a certain degree of external impact, and reduce scratches and breakages in daily use; it has good chemical resistance and weather resistance, can resist ultraviolet radiation, slow down the aging process, and extend the service life of the window film; it can maintain good dimensional stability in a wide temperature range, and is not easy to shrink or expand due to temperature changes, ensuring the stability of the shape after filming; the material is easy to process, and its functionality can be enhanced by coating, compounding, etc. to meet the needs of different application scenarios.

[0045] By using the concave lens principle, the optical performance of the window film is further improved. In some embodiments, the surface of the second composite substrate layer 2 facing the first composite substrate layer 1 is provided with an anti-reflection recess 100; Figure 5 As shown, in other embodiments, the third composite substrate layer 3 is provided with an anti-reflection recess 100 on the surface facing the first composite substrate layer 1. If the anti-reflection recess is directly exposed on the outer surface of the window film, rainwater forms water droplets in the anti-reflection recess on the outer surface of the window film after rain, and the film surface is easily burned by concentrated light.

[0046] The surface of the mounting adhesive layer 200 is provided with an antistatic release film 5. As a protective barrier, the release film can prevent the mounting adhesive layer from sticking or being contaminated when not in use, ensuring that the mounting adhesive layer remains clean and has good adhesion when it is required to be bonded; in an automated or high-speed bonding production line, the antistatic release film can reduce bonding deviations or failures caused by static electricity, thereby improving production efficiency and product quality.

[0047] Among them, the thickness of the first composite substrate layer 1 is 20 to 40 μm, the thickness of the second composite substrate layer 2 is 20 to 40 μm, the thickness of the third composite substrate layer 3 is 20 to 40 μm, the thickness of the wear-resistant hardened layer 4 is 2 to 4 μm, the thickness of the first connecting adhesive layer 201 is 6 to 10 μm, the thickness of the second connecting adhesive layer 202 is 6 to 10 μm, the thickness of the mounting adhesive layer 200 is 6 to 10 μm, and the thickness of the antistatic release film 5 is 20 to 50 μm; the first substrate unit layer 11 accounts for 5% to 15% of the thickness of the first composite substrate layer 1, and the third substrate unit layer 23 accounts for 5% to 15% of the thickness of the second composite substrate layer 2.

[0048] Example 1

[0049] like Figure 1As shown, the anti-aging window film of Example 1 includes a first composite substrate layer 1, a second composite substrate layer 2, a first connecting adhesive layer 201 and an installation adhesive layer 200, wherein the first connecting adhesive layer 201 connects the first composite substrate layer 1 and the second composite substrate layer 2, and the first composite substrate layer 1 and the first connecting adhesive layer 201 are matched in a concave-convex manner. Among them, the first composite substrate layer 1 is a stacked structure of a first substrate unit layer 11 / a second substrate unit layer 12, and the second composite substrate layer 2 is a stacked structure of a third substrate unit layer 23 / a fourth substrate unit layer 24, the layer thickness of the first substrate unit layer 11 is less than the layer thickness of the second substrate unit layer 12, and the layer thickness of the third substrate unit layer 23 is less than the layer thickness of the fourth substrate unit layer 24. The first substrate unit layer 11 is an anti-ultraviolet unit layer, and the third substrate unit layer 23 is an anti-aging unit layer. Both the first substrate unit layer 11 and the third substrate unit layer 23 are arranged toward the first connecting adhesive layer 201. A wear-resistant hardening layer 4 is arranged on the surface of the first composite substrate layer 1 away from the second composite substrate layer 2. The mounting adhesive layer 200 is disposed on the surface of the second composite substrate layer 2 away from the first composite substrate layer 1, and the surface of the mounting adhesive layer 200 is provided with an antistatic release film 5. The first connecting adhesive layer 201 is a colored acrylic pressure-sensitive adhesive.

[0050] Example 2

[0051] like Figure 2 As shown, Example 2 is based on Example 1, except that the first composite substrate layer 1 is a stacked structure of the first substrate unit layer 11 / the second substrate unit layer 12 / the first substrate unit layer 11, and the stacked structure of the second composite substrate layer 2 remains unchanged, wherein the third substrate unit layer 23 is an anti-aging unit layer, one of the first substrate unit layers 11 is an anti-aging unit layer, and the other is an anti-ultraviolet unit layer. The third substrate unit layer 23 is disposed toward the first connecting adhesive layer 201.

[0052] Example 3

[0053] like Figure 3 As shown, Example 3 is based on Example 1, except that the first composite substrate layer 1 is a stacked structure of the first substrate unit layer 11 / the second substrate unit layer 12 / the first substrate unit layer 11, the second composite substrate layer 2 is a stacked structure of the third substrate unit layer 23 / the fourth substrate unit layer 24 / the third substrate unit layer 23, the first substrate unit layer 11 close to the first connecting adhesive layer 201 is an anti-ultraviolet unit layer, and the other is an anti-aging unit layer; the third substrate unit layer 23 close to the first connecting adhesive layer 201 is an anti-ultraviolet unit layer, and the other is an anti-aging unit layer. The first composite substrate layer 1 and the second composite substrate layer 2 are symmetrically arranged on the two surfaces of the first connecting adhesive layer 201.

[0054] Example 4

[0055] like Figures 4-5As shown, Example 4 is based on Example 1, except that the window film further includes a third composite substrate layer 3, and the third composite substrate layer 3 is disposed between the second composite substrate layer 2 and the mounting adhesive layer 200. The third composite substrate layer 3 is connected to the second composite substrate layer 2 through the second connecting adhesive layer 202, and the second connecting adhesive layer 202 is matched with the second composite substrate layer 2 in a concave-convex manner. The surface of the third composite substrate layer 3 facing the first composite substrate layer 1 is provided with an anti-reflection recess 100. The second connecting adhesive layer 202 is a heat-insulating adhesive.

[0056] The performance test of window film is as follows:

[0057] 1. Ultraviolet blocking rate: Use LS182 solar film tester for testing;

[0058] 2. Aging resistance: QUV ultraviolet accelerated aging machine, model Q-LAB; according to standard ISO11507, the test time is 2000h.

[0059] 3. Infrared blocking rate: The testing instrument is LS160 Transmission Meter.

[0060] The window films of Examples 1 to 4 have an ultraviolet blocking rate of more than 99%, and the ultraviolet blocking rate of the window films after aging is still more than 99%; the infrared transmittance of Example 4 is less than 6%, and the infrared transmittance of the window film after aging is less than 6%.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An anti-aging window film, characterized in that: include, The first composite substrate layer is co-extruded with at least two layers; The second composite substrate layer is co-extruded with at least two layers; A first connecting adhesive layer, sandwiched between the first composite substrate layer and the second composite substrate layer; An installation adhesive layer is disposed on a surface of the second composite substrate layer away from the first composite substrate layer; The first composite substrate layer and / or the second composite substrate layer comprises an anti-aging unit layer; The first composite substrate layer and the first connecting adhesive layer are matched in a concave-convex manner.

2. The anti-aging window film according to claim 1, characterized in that: The first composite substrate layer and / or the second composite substrate layer comprises an anti-ultraviolet unit layer.

3. The anti-aging window film according to claim 2, characterized in that: The first composite substrate layer is a first substrate unit layer / a second substrate unit layer, or a stacked structure of a first substrate unit layer / a second substrate unit layer / a first substrate unit layer; the second composite substrate layer is a third substrate unit layer / a fourth substrate unit layer, or a stacked structure of a third substrate unit layer / a fourth substrate unit layer / a third substrate unit layer; The thickness of the first substrate unit layer is smaller than the thickness of the second substrate unit layer; The thickness of the third substrate unit layer is smaller than the thickness of the fourth substrate unit layer.

4. The anti-aging window film according to claim 3, characterized in that: The first substrate unit layer and / or the third substrate unit layer is one of an anti-aging unit layer and an anti-ultraviolet unit layer.

5. The anti-aging window film according to claim 1, characterized in that: A wear-resistant hardened layer is disposed on a surface of the first composite substrate layer away from the second composite substrate layer.

6. The anti-aging window film according to claim 1, characterized in that: It also includes a third composite substrate layer, which is sandwiched between the first composite substrate layer and the second composite substrate layer, or arranged between the second composite substrate layer and the installation adhesive layer. The third composite substrate layer is connected to the second composite substrate layer through a second connecting adhesive layer.

7. The anti-aging window film according to claim 6, characterized in that: One of the first connecting adhesive layer and the second connecting adhesive layer is a colored acrylic pressure-sensitive adhesive, and the other is a heat-insulating adhesive.

8. The anti-aging window film according to claim 6 or 7, characterized in that: The main materials of the first composite substrate layer, the second composite substrate layer and the third composite substrate layer are all polyethylene terephthalate.

9. The anti-aging window film according to claim 6, characterized in that: An anti-reflection recessed portion is provided on the surface of the second composite substrate layer facing the first composite substrate layer, or an anti-reflection recessed portion is provided on the surface of the third composite substrate layer facing the first composite substrate layer.

10. The anti-aging window film according to claim 1, characterized in that: An antistatic release film is arranged on the surface of the installation adhesive layer.

Images