Energy-saving window film

Abstract

The present application relates to an energy-saving window film. The energy-saving window film comprises a first elastic layer, a support layer and a second elastic layer which are stacked, wherein the support layer comprises a substrate layer, and the substrate layer is one of a PET layer, a PVDF layer, a PI layer or a PA layer. The first elastic layer is arranged on one side surface of the support layer, and the first elastic layer is one of a TPU layer, a PVC layer or a TPH layer, and the second elastic layer is arranged on the other side surface of the support layer, and the second elastic layer is one of a TPU layer, a PVC layer or a TPH layer. The above energy-saving window film has a long service life and is easier to post.

Description

Technical Field

[0001] The present application relates to the technical field of window films, and in particular to an energy-saving window film. Background Art

[0002] Window film is a multi-layer composite film material that can be affixed to the surface of glass to improve the performance and strength of the glass, giving the glass functions such as thermal insulation, heat insulation, energy saving, explosion-proof, UV protection, beautification of appearance, privacy protection and safety protection. Window film is mainly used in automotive glass and building doors and windows, partitions and ceilings.

[0003] In the related art, window films are mostly based on PET (Polyethylene terephthalate, polyester resin). PET window films have poor anti-aging and ductility, resulting in a generally short service life of external window films and difficulty in film application. With the development of the industry, more and more glass is curved, i.e., curved glass. When applying window film to curved glass with a large curvature, construction workers are required to have a high level of technical skills, and film application is difficult. During the process of installing the window film, it is very easy for the window film to break and other installation failures to occur, resulting in material waste. Utility Model Content

[0004] Based on this, it is necessary to provide an energy-saving window film with a long service life and easy installation to address the above problems.

[0005] An energy-saving window film, comprising:

[0006] A support layer, wherein the support layer comprises a substrate layer, and the substrate layer is one of a PET layer, a PVDF layer, a PI layer or a PA layer;

[0007] A first elastic layer, wherein the first elastic layer is disposed on one side surface of the supporting layer, and the first elastic layer is one of a TPU layer, a PVC layer, and a TPH layer; and

[0008] The second elastic layer is arranged on the other side surface of the supporting layer, and the second elastic layer is one of a TPU layer, a PVC layer, and a TPH layer.

[0009] The technical solution is further described below:

[0010] In one embodiment, the support layer further includes a coating layer, and the coating layer is disposed on at least one side surface of the substrate layer.

[0011] In one embodiment, the window film further includes a first composite adhesive layer and a second composite adhesive layer, wherein the first composite adhesive layer is disposed between the support layer and the first elastic layer, and the second composite adhesive layer is disposed between the support layer and the second elastic layer.

[0012] In one embodiment, the window film further includes a mounting adhesive layer, and the mounting adhesive layer is disposed on a surface of the first elastic layer that is away from the supporting layer.

[0013] In one embodiment, the energy-saving window film further includes a first release layer, and the first release layer is disposed on a side of the installation adhesive layer away from the first elastic layer.

[0014] In one embodiment, the window film further includes a hardening repair layer, and the hardening repair layer is disposed on a side of the second elastic layer away from the supporting layer.

[0015] In one embodiment, the energy-saving window film further includes a second release layer, and the second release layer is disposed on a side of the hardened repair layer away from the second elastic layer.

[0016] In one embodiment, one or more of the support layer, the first elastic layer, the second elastic layer, the first composite adhesive layer, the second composite adhesive layer, the installation adhesive layer, and the hardened repair layer is provided with an ultraviolet absorber.

[0017] In one embodiment, the thickness of the substrate layer is 3 micrometers to 50 micrometers; the thickness of the first elastic layer is 10 micrometers to 200 micrometers.

[0018] In one embodiment, the thickness of the second elastic layer is 10 micrometers to 200 micrometers.

[0019] In the above energy-saving window film, the first elastic layer and the second elastic layer are respectively compounded on both sides of the support layer, wherein the base material layer of the support layer is one of a PET layer, a PVDF layer, a PI layer or a PA layer with good strength and support performance, and the first elastic layer and the second elastic layer are one of a TPU layer, a PVC layer or a TPH layer with good weather resistance and ductility. In this way, the energy-saving window film has both good structural strength and excellent weather resistance and ductility. Compared with the traditional pure PET structure window film, the energy-saving window film of the present application is compounded with the first elastic layer and the second elastic layer on both sides of the support layer, so that the inner and outer sides of the energy-saving window film have good weather resistance and can effectively resist the erosion of sun and rain. In this way, the energy-saving window film can be attached to the window glass to maintain a long service life. At the same time, thanks to the good ductility of the first elastic layer and the second elastic layer, the energy-saving window film can better conform to the curvature of the curved glass when pasted, making it easier to stick to the curved glass, reducing the difficulty of pasting, and also reducing the risk of breakage and damage of the energy-saving window film during the pasting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0023] Figure 1 Schematic diagram of the structure of an energy-saving window film according to an embodiment.

[0024] Figure 2 FIG. 4 is a schematic structural diagram of an energy-saving window film according to another embodiment.

[0025] Figure 3 FIG. 4 is a schematic structural diagram of an energy-saving window film according to another embodiment.

[0026] 10. Support layer; 11. Base material layer; 12. Coating layer; 21. First elastic layer; 22. Second elastic layer; 30. Mounting adhesive layer; 40. First release layer; 51. First composite adhesive layer; 52. Second composite adhesive layer; 60. Hardening repair layer; 70. Second release layer. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] See also Figure 1 , an embodiment of the present application provides an energy-saving window film. Specifically, the energy-saving window film of one embodiment includes a first elastic layer 21, a support layer 10 and a second elastic layer 22 which are stacked, wherein the support layer 10 includes a substrate layer 11, and the substrate layer 11 is one of a PET (Polyethylene terephthalate, polyester resin) layer, a PVDF (polyvinylidenedifluoride, polyvinylidene fluoride) layer, a PI (Polyimide, polyimide) layer or a PA (polyamide, polyamide) layer. The first elastic layer 21 is arranged on one side surface of the support layer 10, and the first elastic layer 21 is one of a TPU (thermoplastic polyurethane rubber) layer, a PVC (Polyvinyl chloride, polyvinyl chloride) layer or a TPH layer, and the second elastic layer 22 is arranged on the other side surface of the support layer 10, and the second elastic layer 22 is one of a TPU (thermoplastic polyurethane rubber) layer, a PVC (Polyvinylchloride, polyvinyl chloride) layer or a TPH layer.

[0034] Specifically, during pasting, the side of the first elastic layer 21 facing away from the supporting layer 10 can be attached to the glass surface, that is, the first elastic layer 21 is located on the inner side, the second elastic layer 22 is located on the outer side, and the supporting layer 10 is located between the first elastic layer 21 and the second elastic layer 22 .

[0035] In the above energy-saving window film, the first elastic layer 21 and the second elastic layer 22 are respectively compounded on both sides of the support layer 10, wherein the substrate layer 11 of the support layer 10 is one of a PET layer, a PVDF layer, a PI layer or a PA layer with good strength and support performance, and the first elastic layer 21 and the second elastic layer 22 are one of a TPU layer, a PVC layer or a TPH layer with good weather resistance and ductility. In this way, the energy-saving window film has both good structural strength and excellent weather resistance and ductility. Compared with the traditional pure PET structure window film, the energy-saving window film of the present application is compounded with the first elastic layer 21 and the second elastic layer 22 on both sides of the support layer 10, so that the inner and outer sides of the energy-saving window film have good weather resistance and can effectively resist the erosion of sun and rain. In this way, the energy-saving window film can also maintain a long service life when it is attached to the window glass. At the same time, thanks to the good ductility of the first elastic layer 21 and the second elastic layer 22, the energy-saving window film can better conform to the curvature of the curved glass when pasted, making it easier to stick to the curved glass, reducing the difficulty of pasting and the risk of cracking and damage of the energy-saving window film during the pasting process.

[0036] See also Figure 2 as well as Figure 3 In one embodiment, the support layer 10 further includes a coating layer 12, and the coating layer 12 is disposed on at least one surface of the substrate layer 11, that is, the coating layer 12 can be disposed on one surface of the substrate layer 11, or on both surfaces of the substrate layer 11. The coating layer 12 is used for selective transmission or reflection of the spectrum to achieve the heat insulation, shading and other functions of the energy-saving window film. Furthermore, compared with the traditional window film of pure TPU structure, the material of the substrate layer 11 of the present application is one of PET layer, PVDF layer, PI layer or PA layer, so that the substrate layer 11 has better support performance and structural strength, and will not produce too much deformation when stretched during posting. By arranging the coating layer 12 on the substrate layer 11, the coating layer 12 will not be easily torn due to the stretching of the energy-saving window film during posting, thereby ensuring the stability of the coating layer 12, and then ensuring the stability of the appearance, heat insulation performance and service life of the energy-saving window film.

[0037] Optionally, in one embodiment, the coating layer 12 may be a metal coating, an oxide coating or a nitride coating. The coating layer 12 may be formed on the surface of the substrate layer 11 by a vacuum sputtering coating process. The coating layer 12 may be provided with coatings of different materials and different numbers, so that the coating layer 12 can have different reflection and transmission properties for light of different wavelengths, thereby making the energy-saving window film have better heat insulation performance. Among them, the metal coating may include pure metals, such as aluminum, titanium, copper or silver, or alloys, such as nickel complex alloys or stainless steel. The oxide coating may include titanium oxide, niobium oxide, cesium oxide, silicon oxide, indium tin oxide, zinc oxide or zinc aluminum oxide. The nitride coating may include titanium nitride, etc. Preferably, the thickness of the coating layer 12 may be 5nm to 500nm. For example, it may be 5nm, 10nm, 25nm, 50nm, 100nm, 200nm, 300nm, 400nm, 500nm. The coating layer 12 of the above thickness has good heat insulation and thermal insulation performance, and when the energy-saving window film is attached to a curved window glass with a larger curvature, the coating layer 12 is not easily stretched and damaged.

[0038] It is worth noting that in other embodiments, by adding materials that can selectively transmit or reflect the spectrum into the substrate layer 11 , the heat insulation, light shielding and other functions of the energy-saving window film can also be achieved, thereby eliminating the coating layer 12 .

[0039] Continue to see Figure 2 In one embodiment, the energy-saving window film further includes a first composite adhesive layer 51 and a second composite adhesive layer 52, wherein the first composite adhesive layer 51 is disposed between the support layer 10 and the first elastic layer 21. The first composite adhesive layer 51 is used to bond the support layer 10 and the first elastic layer 21, so that the support layer 10 and the first elastic layer 21 are bonded together. Similarly, the second composite adhesive layer 22 is disposed between the support layer 10 and the second elastic layer 22. The second composite adhesive layer 52 is used to bond the support layer 10 and the first elastic layer 21, so that the support layer 10 and the first elastic layer 21 are bonded together. Optionally, in one embodiment, the first composite adhesive layer 51 and the second composite adhesive layer 52 can both be glue, and the thickness of the first composite adhesive layer 51 and the second composite adhesive layer 52 can be 2 microns to 50 microns, for example, 2 microns, 10 microns, 15 microns, 25 microns, 30 microns, 40 microns, 50 microns, etc. can be selected. The composite adhesive layer of the above thickness can better bond the support layer 10 and the elastic layer, and when the energy-saving window film is stretched and extended, the support layer 10 and the elastic layer are not easy to separate.

[0040] Optionally, in one embodiment, see Figure 3 The coating layer 12 is disposed between the substrate layer 11 and the first composite adhesive layer 51. Figure 2In another embodiment, the coating layer 12 is disposed between the substrate layer 11 and the second composite adhesive layer 52, so that both sides of the coating layer 12 can be protected by the substrate layer 11 and the composite adhesive respectively, further preventing the coating layer 12 from being torn by external force, thereby extending the service life of the energy-saving window film.

[0041] See also Figure 2 In one embodiment, the energy-saving window film further includes an installation adhesive layer 30, and the installation adhesive layer 30 is disposed on a surface of the first elastic layer 21 on one side away from the support layer 10. Specifically, the installation adhesive layer 30 is used to bond with the window glass to install the energy-saving window film on the glass surface. Optionally, in one embodiment, the installation adhesive layer 30 can select a pressure-sensitive adhesive. The thickness of the installation adhesive layer 30 is 2 microns to 50 microns, for example, 2 microns, 10 microns, 15 microns, 25 microns, 30 microns, 40 microns, 50 microns, etc. can be selected. The installation adhesive layer 30 of the above thickness can be well bonded to the window glass to firmly fix the energy-saving window film on the window glass.

[0042] Continue to see Figure 2 Optionally, in one embodiment, the energy-saving window film further includes a first release layer 40, which is disposed on the side of the installation adhesive layer 30 away from the support layer 10. The first release layer 40 is used to protect the installation adhesive layer 30 to prevent the installation adhesive layer 30 from solidifying or adhering to impurities during storage or transportation of the energy-saving window film, thereby affecting the viscosity of the installation adhesive layer 30. Further, when the energy-saving window film needs to be attached to the window glass, the first release layer 40 can be partially or completely separated from the installation adhesive layer 30, and then the installation adhesive layer 30 exposed to the outside can be adhered to the window glass to achieve the attachment of the energy-saving window film. Optionally, in one embodiment, the first release layer 40 can be a release paper, and the thickness of the first release layer 40 is 10 microns to 100 microns, for example, 10 microns, 15 microns, 25 microns, 30 microns, 40 microns, 50 microns, 80 microns, 100 microns, etc. can be selected.

[0043] See also Figure 2 In one embodiment, the energy-saving window film further includes a hardening repair layer 60, which is disposed on the side of the second elastic layer 22 away from the support layer 10. The hardening repair layer 60 is used to protect the second elastic layer 22, ensuring that the second elastic layer 22 is not scratched during the installation and use of the energy-saving window film, thereby further improving the service life of the energy-saving window film. Preferably, the thickness of the hardening repair layer 60 is 1 micron to 20 microns.

[0044] Continue to see Figure 2Optionally, in one embodiment, the energy-saving window film further includes a second release layer 70, which is disposed on the side of the hardening repair layer 60 away from the elastic layer. The second release layer 70 is used to protect the hardening repair layer 60 to prevent the hardening repair layer 60 from being scratched during the storage, transportation and installation of the energy-saving window film. Specifically, when the energy-saving window film needs to be attached to the window glass, the energy-saving window film and the window glass can be bonded first. During the bonding process, the second release layer 70 can be scraped by a scraper to discharge the air between the energy-saving window film and the window glass to prevent bubbles from appearing between the energy-saving window film and the window glass. After the energy-saving window film is completely attached to the window glass, the second release layer 70 is torn off to prevent the scraper from scratching the hardening repair layer 60. Optionally, in one embodiment, the second release layer 70 can be a release paper, and the second release layer 70 is 10 microns to 100 microns, for example, 10 microns, 15 microns, 25 microns, 30 microns, 40 microns, 50 microns, 80 microns or 100 microns can be selected.

[0045] Optionally, in one embodiment, one or more of the support layer 10, the first elastic layer 21, the second elastic layer 22, the first composite adhesive layer 51, the second composite adhesive layer 52, the installation adhesive layer 30, and the hardening and repairing layer 60 are provided with an ultraviolet absorber. For example, in one embodiment, any one of the support layer 10, the first elastic layer 21, the second elastic layer 22, the first composite adhesive layer 51, the second composite adhesive layer 52, the installation adhesive layer 30, and the hardening and repairing layer 60 is provided with an ultraviolet absorber. In other embodiments, any two, three or more layers thereof may be provided with an ultraviolet absorber, thereby improving the ultraviolet absorption and aging resistance of the energy-saving window film. Optionally, the ultraviolet absorber is one or a combination of salicylates, benzophenones, benzotriazoles, triazines, and hindered amines. In one embodiment, one or more of the supporting layer 10, the first elastic layer 21, the second elastic layer 22, the first composite adhesive layer 51, the second composite adhesive layer 52, the mounting adhesive layer 30, and the hardening repair layer 60 are provided with a colorant, so that the energy-saving window film can produce a corresponding color by adjusting the color of the colorant. In addition, adjusting the content of the colorant can also affect the light transmittance of the energy-saving window film.

[0046] Optionally, in one embodiment, the thickness of the substrate layer 11 is 3 microns to 50 microns. For example, 3 microns, 6 microns, 10 microns, 15 microns, 25 microns, 30 microns, 40 microns, 50 microns, etc. can be selected. The substrate layer 11 of the above thickness has good structural strength, can support the coating layer 12, and ensure that the coating layer 12 is not easily stretched and damaged.

[0047] Optionally, in one embodiment, the thickness range of the first elastic layer 21 and the thickness range of the second elastic layer 22 can both be 10 microns to 300 microns. For example, 10 microns, 25 microns, 30 microns, 40 microns, 50 microns, 100 microns, 150 microns, 200 microns, 250 microns or 300 microns can be selected. The first elastic layer 21 and the second elastic layer 22 of the above thickness have good ductility, can be adapted to curved window glass with a larger curvature, and are not easily stretched and damaged.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An energy-saving window film, characterized in that: include: A support layer, wherein the support layer comprises a substrate layer, and the substrate layer is one of a PET layer, a PVDF layer, a PI layer or a PA layer; A first elastic layer, wherein the first elastic layer is disposed on one side surface of the supporting layer, and the first elastic layer is one of a TPU layer, a PVC layer, and a TPH layer; and The second elastic layer is arranged on the other side surface of the supporting layer, and the second elastic layer is one of a TPU layer, a PVC layer, and a TPH layer.

2. The energy-saving window film according to claim 1, characterized in that: The support layer further comprises a coating layer, and the coating layer is arranged on at least one side surface of the substrate layer.

3. The energy-saving window film according to claim 1, characterized in that: The window film further includes a first composite adhesive layer and a second composite adhesive layer. The first composite adhesive layer is disposed between the support layer and the first elastic layer, and the second composite adhesive layer is disposed between the support layer and the second elastic layer.

4. The energy-saving window film according to claim 3, characterized in that: The window film further comprises an installation adhesive layer, and the installation adhesive layer is arranged on a surface of the first elastic layer on a side away from the supporting layer.

5. The energy-saving window film according to claim 4, characterized in that: The energy-saving window film further includes a first release layer, and the first release layer is arranged on a side of the installation adhesive layer away from the first elastic layer.

6. The energy-saving window film according to claim 4, characterized in that: The window film further includes a hardening and repairing layer, and the hardening and repairing layer is arranged on a side of the second elastic layer away from the supporting layer.

7. The energy-saving window film according to claim 6, characterized in that: The energy-saving window film further includes a second release layer, and the second release layer is arranged on a side of the hardened repair layer away from the second elastic layer.

8. The energy-saving window film according to any one of claims 1 to 7, characterized in that: The thickness of the substrate layer is 3 micrometers to 50 micrometers.

9. The energy-saving window film according to any one of claims 1 to 7, characterized in that: The thickness of the first elastic layer is 10 micrometers to 200 micrometers; the thickness of the second elastic layer is 10 micrometers to 200 micrometers.

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