Heat-insulating and energy-saving film for building

Abstract

The utility model discloses a heat-insulating and energy-saving film for buildings, which comprises a base layer, a heat-insulating layer, a heat-insulating layer, a heat-insulating layer and a heat-insulating layer, the mounting adhesive layer is arranged on the inner surface; the heat insulation composite layer is arranged on the outer surface of the base layer and comprises transparent layers and heat insulation layers which are alternately stacked; the heat insulation layers comprise at least two layers, and the refractive indexes of the at least two layers of heat insulation layers are sequentially increased from outside to inside. The heat insulation composite layer is formed by the transparent layers and the heat insulation layers which are alternately stacked, so that the processing technology is optimized, and the mechanical performance of the energy-saving film is improved; the light transmittance of the energy-saving film is improved by adjusting the refractive index and the layer thickness of each layer of the heat insulation layer; the heat insulation layers are compounded, so that the problem that a single barrier film is poor in heat insulation effect is solved, and the problems that heat insulation performance is improved by adding a large amount of heat insulation materials, precipitation is prone to occurring, and the haze of the energy-saving film is improved are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat insulation films, in particular to a heat insulation and energy-saving film for buildings. Background Art

[0002] my country's construction industry consumes a lot of energy, and the energy consumption caused by windows accounts for about 40% to 50% of the total energy consumption caused by the building envelope. In areas where cooling is the main demand, the use of building energy-saving glass can improve the optical properties of glass, improve the thermal insulation effect of windows, improve the indoor thermal comfort environment, and reduce the cooling load of buildings, thereby achieving the purpose of energy saving. Transparent nano thermal insulation film is attached to the surface of ordinary glass. It is a new passive cooling technology with passive input. It can block most of the solar radiation from entering the room, so that the indoor temperature of the building is maintained at a comfortable level, thereby reducing the cooling energy consumption of building glass windows caused by solar radiation, and does not require additional cooling electricity or other energy, significantly improving the energy efficiency of building glass windows.

[0003] Metal film has a heat-insulating effect, but its clarity is low and its reflection is high, which can easily cause visual fatigue and lead to accidents; metal composite film has a heat-insulating effect, but its preparation is complicated, the cost is high, and it is easily oxidized, resulting in reduced heat-insulating effect and shortened service life. Although window film can achieve heat insulation, its light transmittance decreases, resulting in poor indoor lighting.

[0004] Therefore, it is necessary to improve the heat-insulating and energy-saving films for buildings 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 to provide a heat-insulating energy-saving film for construction. The heat-insulating composite layer is composed of alternately stacked transparent layers and heat-insulating layers, which not only optimizes the processing technology, but also improves the mechanical properties of the energy-saving film; the light transmittance of the energy-saving film is improved by adjusting the refractive index and layer thickness of each layer of the heat-insulating layer; the composite between the heat-insulating layers not only solves the problem of poor heat-insulating effect of a single barrier film, but also solves the problem of easy precipitation and increasing the haze of the energy-saving film by adding a large amount of heat-insulating materials to improve the heat-insulating performance.

[0006] In order to achieve the above technical effects, the technical solution of the utility model is: a heat-insulating energy-saving film for construction, comprising:

[0007] A base layer having an inner surface and an outer surface along the film thickness direction;

[0008] An installation adhesive layer is arranged on the inner surface;

[0009] It also includes a heat-insulating composite layer, which is arranged on the outer surface of the base layer and includes alternately stacked transparent layers and heat-insulating layers; the heat-insulating layer includes at least two layers, and the refractive index of the at least two layers of the heat-insulating layer increases successively from the outside to the inside.

[0010] A preferred technical solution is that the material of the heat insulation layer is an acrylic adhesive containing heat insulation nanomaterials.

[0011] A preferred technical solution is that the thermal insulation composite layer is a laminated structure of transparent layer / thermal insulation layer / transparent layer / thermal insulation layer, or a laminated structure of transparent layer / thermal insulation layer / transparent layer / thermal insulation layer / transparent layer / thermal insulation layer.

[0012] A preferred technical solution is that the heat-insulating nanomaterial contained in the heat-insulating layer is one of silicon dioxide, titanium dioxide and cesium tungsten bronze powder.

[0013] A preferred technical solution is that the material of the transparent layer is one or a combination of a PVC layer, a TPU layer and a PET layer.

[0014] A preferred technical solution is that a wear-resistant coating is provided on the surface of the thermal insulation composite layer away from the base layer.

[0015] The preferred technical solution is that the material of the base layer is PET, and the mounting adhesive layer is acrylic adhesive.

[0016] A preferred technical solution is that one surface of the installation adhesive layer is connected to the base layer, and the other surface is provided with a concave-convex surface, and the concave-convex surface is matched with the antistatic PET release layer in a concave-convex manner.

[0017] The preferred technical solution is that the thickness of the heat insulation composite layer is 42-120 μm, the thickness of the base layer is 20-40 μm, and the thickness of the installation adhesive layer is 6-10 μm.

[0018] The advantages and beneficial effects of the utility model are:

[0019] The heat-insulating and energy-saving film for buildings has a reasonable structure. The heat-insulating composite layer is composed of alternately stacked transparent layers and heat-insulating layers, which not only optimizes the processing technology, but also improves the mechanical properties of the energy-saving film; the light transmittance of the energy-saving film is improved by adjusting the refractive index and layer thickness of each layer of the heat-insulating layer; the composite between the heat-insulating layers not only solves the problem of poor heat-insulating effect of a single barrier film, but also solves the problem of easy precipitation and increasing the haze of the energy-saving film by adding a large amount of heat-insulating materials to improve the heat-insulating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model heat-insulating and energy-saving film for buildings;

[0021] Figure 2 It is a structural schematic diagram of Example 1 of the utility model of heat-insulating and energy-saving film for buildings.

[0022] In the figure: 1, base layer; 2, mounting adhesive layer; 3, thermal insulation composite layer; 4, wear-resistant coating; 5, antistatic PET release layer; 31, transparent layer; 32, thermal insulation layer; 101, inner surface; 102, outer surface; 321, first adhesive layer; 322, second adhesive layer; 323, third adhesive layer. DETAILED DESCRIPTION

[0023] 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.

[0024] The terms "inside" and "outside" are based on the normal use state of the thermal insulation and energy-saving film for buildings, and are only used to facilitate the description of the present invention and simplify the description, rather than to 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 invention.

[0025] In addition, 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.

[0026] like Figures 1-2 As shown, the utility model of the heat-insulating energy-saving film for construction includes a heat-insulating composite layer 3, a base layer 1 and a mounting adhesive layer 2, the base layer 1 has an inner surface 101 and an outer surface 102 along the film thickness direction, the mounting adhesive layer 2 is arranged on the inner surface 101, the heat-insulating composite layer 3 is arranged on the outer surface 102 of the base layer 1, and the heat-insulating composite layer 3 includes alternately stacked transparent layers 31 and heat-insulating layers 32; wherein the heat-insulating layer 32 includes at least two layers, and the refractive index of the at least two heat-insulating layers 32 increases successively from the outside to the inside.

[0027] Furthermore, the material of the heat-insulating layer 32 is an acrylic adhesive containing heat-insulating nanomaterials. Acrylic adhesives have high bonding strength, good transparency, quick drying, room temperature curing ability, and wide applicability to a variety of materials; the formed adhesive layer is usually tough, has good gloss, is resistant to general acid and alkali media, and has excellent aging resistance; and has good transparency, which can be completely transparent; it can be used in a wide temperature range, such as -30°C to 150°C, and can still maintain stable bonding performance and physical properties within this range, so it is suitable for outdoor applications in high or low temperature environments, and is not prone to stratification. Among them, the heat-insulating nanomaterial is one of silicon dioxide, titanium dioxide, and cesium tungsten bronze powder. When silicon dioxide exists in the form of silicon dioxide aerogel, it has very excellent heat-insulating properties. The main reason is that it has extremely low density and a large number of nanoscale pore structures. These pores can effectively prevent the convection heat transfer of gas molecules. At the same time, due to its high porosity, the heat conduction process is slowed down, showing an extremely low thermal conductivity, thus maintaining the indoor problem. Transparent thermal insulation films containing silicon dioxide can also reduce heat transfer by reflecting or absorbing sunlight in a specific band, especially ultraviolet rays and part of near-infrared light, thereby achieving thermal insulation while maintaining good light transmittance. Titanium dioxide has a strong light reflection ability due to its high refractive index, especially the reflection of ultraviolet rays and near-infrared light, which has a thermal insulation effect. As an important nanomaterial, cesium tungsten bronze nanopowder is widely used in the field of transparent thermal insulation coatings; cesium tungsten bronze nanoparticles have high absorption performance for infrared light, while maintaining a high visible light transmittance, which makes it a key component of transparent thermal insulation coatings, which can effectively block the heat energy in solar radiation from entering the room, reduce the air conditioning load, and improve the energy-saving efficiency of buildings; the material has good high temperature stability and oxidation resistance, which is suitable for thermal insulation needs under long-term outdoor use conditions; and compared with some heavy metal elements, cesium tungsten bronze has certain advantages in environmental protection, reducing the possible adverse effects on the environment and human body.

[0028] In some embodiments, the thermal insulation composite layer 3 is a laminated structure of transparent layer 31 / thermal insulation layer 32 / transparent layer 31 / thermal insulation layer 32. Since the thermal insulation layer 32 is a glue layer cured by acrylic adhesive, the multiple transparent layers are compounded through the glue layer and connected to the base layer 1, which not only improves the mechanical properties of the energy-saving film, but also the thermal insulation nanomaterial and acrylic adhesive can flexibly adjust the content, thereby achieving both the effect of thermal insulation and the effect of high light transmittance. Furthermore, the thermal insulation layer 32 is respectively close to the base layer from the outside to the inside, and is respectively the first glue layer 321 and the second glue layer 322; wherein, the nanomaterial contained in the first glue layer 321 is silicon dioxide, and the nanomaterial contained in the second glue layer 322 is cesium tungsten bronze nanopowder or titanium dioxide. The nanomaterial contained in the first glue layer 321 is cesium tungsten bronze nanopowder, and the nanomaterial contained in the second glue layer 322 is titanium dioxide. The refractive indices of silicon dioxide, cesium tungsten bronze nanopowder and titanium dioxide increase successively, and then nanomaterials with different refractive indices are added to the acrylic adhesive to form a composite structure stacked successively along the film thickness direction, so as to adjust the refractive index of each layer of the thermal insulation layer and improve the light transmittance of the energy-saving film; the composite between the thermal insulation layers not only solves the problem of poor thermal insulation effect of a single barrier film, but also solves the problem of easy precipitation and increasing the haze of the energy-saving film by adding a larger amount of thermal insulation materials to improve the thermal insulation performance.

[0029] In other embodiments, the heat-insulating composite layer 3 is a laminated structure of transparent layer 31 / heat-insulating layer 32 / transparent layer 31 / heat-insulating layer 32 / transparent layer 31 / heat-insulating layer 32. Furthermore, the heat-insulating layer 32 is respectively a first adhesive layer 321, a second adhesive layer 322 and a third adhesive layer 323 close to the base layer from the outside to the inside, and the first adhesive layer 321, the second adhesive layer 322 and the third adhesive layer 323 respectively contain nanomaterials of silicon dioxide, cesium tungsten bronze nanopowder and titanium dioxide.

[0030] The material of the transparent layer 31 is one of a PVC layer, a TPU layer and a PET layer or a composite thereof. PET (polyethylene terephthalate) has good transparency, mechanical strength and weather resistance; TPU (thermoplastic polyurethane) has high elasticity, wear resistance, tear resistance, hydrolysis resistance and good low-temperature flexibility; PVC (polyvinyl chloride) has good flame retardant properties and good adaptability, and can resist erosion by natural factors such as ultraviolet rays, moisture, and oxygen. It also has good corrosion resistance to most acids, alkalis, and salts, and is suitable for outdoor and chemical environments.

[0031] The surface of the thermal insulation composite layer 3 away from the base layer 1 is provided with a wear-resistant coating 4. The wear-resistant coating 4 can significantly improve the surface hardness and wear resistance of the protective film, reduce the damage caused by friction, scratches and collisions during transportation, installation or daily use, and extend the service life of the protective film and the protected surface; for building materials such as glass, metal plates, stones, etc., any scratches on the surface may affect the appearance and even function; the wear-resistant coating usually has a lower surface tension, which makes it difficult for dust and dirt to adhere to its surface, making cleaning easier and reducing maintenance costs and time; the wear-resistant coating can also provide anti-adhesion properties to ensure that the protective film will not leave residual glue when removed, avoiding secondary pollution to the building materials; the wear-resistant coating also has good waterproof and anti-corrosion properties, can effectively isolate moisture and corrosive substances, and protect the building surface from erosion by environmental factors.

[0032] In order to improve the mechanical properties and transparency of the energy-saving film, the base layer 1 is made of PET and the mounting adhesive layer 2 is made of acrylic adhesive.

[0033] In order to improve the pasting efficiency of the installation glue layer, the installation glue layer 2 has a venting effect to effectively prevent the appearance of bubbles during the film pasting process, which reduces the appearance and performance of the energy-saving film. One surface of the installation glue layer is connected to the base layer, and the other surface is provided with a concave and convex surface, which is matched with the anti-static PET release layer 5.

[0034] The thickness of the heat-insulating composite layer 3 is 42 to 120 μm, the thickness of the base layer 1 is 20 to 40 μm, and the thickness of the mounting adhesive layer 2 is 6 to 10 μm.

[0035] Example 1

[0036] like Figure 1 As shown, the thermal insulation and energy-saving film for construction includes a thermal insulation composite layer 3, a base layer 1 and a mounting adhesive layer 2. The base layer 1 has an inner surface 101 and an outer surface 102 along the film thickness direction. The mounting adhesive layer 2 is arranged on the inner surface 101, and the thermal insulation composite layer 3 is arranged on the outer surface 102 of the base layer 1. The surface of the thermal insulation composite layer 3 away from the base layer 1 is provided with a wear-resistant coating layer 4. One surface of the mounting adhesive layer 2 is connected to the base layer 1, and the other surface is provided with a concave-convex surface (not shown), and the concave-convex surface is matched with the antistatic PET release layer 5. The heat-insulating composite layer 3 is a laminated structure of transparent layer 31 / heat-insulating layer 32 / transparent layer 31 / heat-insulating layer 32. The heat-insulating layer 32 is adjacent to the base layer from the outside to the inside, and the first adhesive layer 321 and the second adhesive layer 322 are respectively; wherein the nano material contained in the first adhesive layer 321 is silicon dioxide, and the nano material contained in the second adhesive layer 322 is cesium tungsten bronze nano powder, that is, the heat-insulating energy-saving film includes a wear-resistant coating layer 4, a heat-insulating composite layer 3 (transparent layer / first adhesive layer / transparent layer / second adhesive layer), a base layer 1, an installation adhesive layer 2 and an antistatic PET release layer 5 which are laminated in sequence. The material of the transparent layer 31 is PET.

[0037] Example 2

[0038] like Figure 2 As shown, Example 2 is based on Example 1, with the difference that the heat-insulating composite layer 3 is a laminated structure of transparent layer 31 / heat-insulating layer 32 / transparent layer 31 / heat-insulating layer 32 / transparent layer 31 / heat-insulating layer 32. The heat-insulating layer 32 is adjacent to the base layer from the outside to the inside, and is respectively the first adhesive layer 321, the second adhesive layer 322 and the third adhesive layer 323. The first adhesive layer 321, the second adhesive layer 322 and the third adhesive layer 323 contain nanomaterials such as silicon dioxide, cesium tungsten bronze nanopowder and titanium dioxide. The transparent layer 31 is adjacent to the base layer from the outside to the inside, and is respectively a TPU layer, a PET layer and a TPU layer. The obtained protective film TPU layer is close to the wear-resistant coating layer 4, which further improves the wear resistance of the energy-saving film; the heat-insulating composite layer 3 and the base layer 1 form a composite layer of alternating TPU layers and PET layers, which not only improves the mechanical properties, but also has excellent bending resistance, and can be suitable for irregular building surfaces.

[0039] 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. A heat-insulating and energy-saving film for building, comprising: A base layer having an inner surface and an outer surface along the film thickness direction; An installation adhesive layer is arranged on the inner surface; It is characterized in that it also includes a heat-insulating composite layer, which is arranged on the outer surface of the base layer, including alternately stacked transparent layers and heat-insulating layers; the heat-insulating layer includes at least two layers, and the refractive index of at least two layers of the heat-insulating layer increases successively from the outside to the inside.

2. The heat-insulating and energy-saving film for construction according to claim 1, characterized in that: The thermal insulation composite layer is a laminated structure of transparent layer / thermal insulation layer / transparent layer / thermal insulation layer, or a laminated structure of transparent layer / thermal insulation layer / transparent layer / thermal insulation layer / transparent layer / thermal insulation layer.

3. The heat-insulating and energy-saving film for construction according to claim 1, characterized in that: The material of the transparent layer is one of a PVC layer, a TPU layer and a PET layer or a combination thereof.

4. The heat-insulating and energy-saving film for construction according to claim 1, characterized in that: The surface of the heat-insulating composite layer away from the base layer is provided with a wear-resistant coating.

5. The heat-insulating and energy-saving film for construction according to claim 1 or 3, characterized in that: The material of the base layer is PET, and the mounting adhesive layer is acrylic adhesive.

6. The heat-insulating and energy-saving film for construction according to claim 1, characterized in that: One surface of the installation adhesive layer is connected to the base layer, and the other surface is provided with a concave-convex surface, and the concave-convex surface is matched with the antistatic PET release layer.

7. The heat-insulating and energy-saving film for construction according to claim 1, characterized in that: The thickness of the heat-insulating composite layer is 42-120 μm, the thickness of the base layer is 20-40 μm, and the thickness of the mounting adhesive layer is 6-10 μm.

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