An ETFE radiative cooling architectural decorative film

Abstract

This utility model discloses an ETFE radiative cooling architectural decorative film, relating to the field of building materials technology. The ETFE radiative cooling architectural decorative film includes an ETFE film after corona treatment. An adhesive layer is printed on the corona-treated surface of the ETFE film. A radiative cooling layer is printed on the adhesive layer. A floral pattern layer is printed on the radiative cooling layer. A transparent cover is printed on the floral pattern layer. The unprinted surface of the ETFE film is the light-receiving surface, so as to achieve the effect of radiative cooling while also providing natural lighting.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, specifically to an ETFE radiation cooling building decorative film. Background Technology

[0002] Most existing architectural membrane materials use polyester fiber or glass fiber as the base material to provide mechanical strength, and then coat the front and back surfaces of the base material with the corresponding PVC resin or PTFE resin multiple times. The process of preparing architectural membrane materials in this way is complicated and the production cost is high.

[0003] Chinese patent CN201620399366.5 discloses a decorative dustproof and moisture-proof printed patterned film that is still difficult to cool down under sunlight. Utility Model Content

[0004] To overcome the shortcomings of the above-mentioned related technologies, this application provides an ETFE radiative cooling architectural decorative film that combines radiative cooling with natural lighting.

[0005] The technical solution adopted by this utility model to solve the technical problem is as follows: an ETFE radiation cooling architectural decorative film, comprising an ETFE film after corona treatment, an adhesive layer printed on the corona-treated surface of the ETFE film, a radiation cooling layer printed on the adhesive layer, a floral pattern layer printed on the radiation cooling layer, a transparent cover layer printed on the floral pattern layer, and the unprinted surface of the ETFE film being the light-receiving surface.

[0006] Preferably, the radiation cooling layer is a resin containing silicon-oxygen bonds.

[0007] Preferably, the thickness of the ETFE film is 200-300 μm.

[0008] Preferably, the thickness of the ETFE film is 250 μm.

[0009] Preferably, the floral pattern layer is printed with a coating that has light-reflective properties.

[0010] Preferably, the thickness of the adhesive bonding layer is 2.5-3.5 μm, the thickness of the radiation cooling layer is 4.5-5.5 μm, the thickness of the floral pattern layer is 9.5-10.5 μm, and the thickness of the transparent cover is 3.5-4.5 μm.

[0011] Preferably, the thickness of the adhesive bonding layer is 3 μm, the thickness of the radiation cooling layer is 5 μm, and the thickness of the transparent cover is 4 μm.

[0012] Preferably, the transparent cover is a varnish cover.

[0013] Compared with related technologies, this utility model has the following advantages: ETFE, an ethylene-tetrafluoroethylene copolymer, possesses excellent aging resistance and light transmittance. Its smooth film surface resists dust and stains, and exhibits good self-cleaning properties in rainwater. ETFE films can achieve light transmittance exceeding 95%. This application involves exposing the unprinted side of the ETFE film to sunlight to enhance its resistance to dust and stains.

[0014] ETFE membranes exhibit good absorption in the atmospheric window of 8μm-13μm, thus providing not only mechanical performance assurance but also good atmospheric window emissivity when used as a base membrane.

[0015] The resin in the radiation coating contains silicon-oxygen bonds, which have excellent emissivity in the 8-13 micrometer band of the atmospheric window. Furthermore, the ETFE film and this functional layer can work synergistically in the atmospheric window band, resulting in an atmospheric window emissivity greater than or equal to 94%, which can efficiently emit infrared radiation.

[0016] The floral pattern layer contains a large number of particles that reflect sunlight, with a solar emissivity of over 80%, which effectively reduces the surface temperature of the membrane material.

[0017] By printing floral patterns, various colors such as silver, blue, and white, as well as different shapes like circles, quadrilaterals, and hexagons, can be printed on the radiant coating, making it more diverse and allowing for more market-appropriate, novel, and elegant designs with excellent decorative effects. Sunlight can pass through the perforated patterns and gaps between them into the ETFE radiant cooling architectural decorative film, achieving both radiant cooling and natural lighting effects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1. ETFE film, 2. Adhesive bonding layer, 3. Radiation cooling layer, 4. Floral pattern layer, 5. Transparent cover. Detailed Implementation

[0019] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Example 1: like Figure 1As shown, an ETFE film 1 with one side of its surface treated by corona treatment is used as the substrate, with a dyne value of 48 mN / m or more and a thickness of 250 micrometers. A 3-micrometer adhesive layer 2 is printed on the corona-treated surface. Then, a radiation cooling layer 3 is printed on the adhesive layer. In this embodiment, silicone-modified acrylic, polydimethylsiloxane and polyurethane resin are used for printing, with a thickness of 5 micrometers. Then, a floral pattern layer 4 of different shapes or colors is printed on the surface of the radiation cooling layer 3. In this embodiment, polyurethane coating is used for printing, with a thickness of 10 micrometers. Finally, a transparent cover 5 with a thickness of 4 micrometers is printed on the floral pattern layer. In this embodiment, varnish is used for printing, resulting in an ETFE radiation cooling architectural decorative film.

[0022] Comparative Example 1 The difference from Example 1 is that the thickness of the floral pattern layer is set to 5 micrometers. Comparative Example 2 The difference from Example 1 is that the thickness of the floral pattern layer is increased to 15 micrometers.

[0023] Comparative Example 3 The difference from Example 1 is that the thickness of the floral pattern layer is increased to 20 micrometers.

[0024] Comparative Example 4 The difference from Example 1 is that the thickness of the radiation cooling layer is set to 2 micrometers.

[0025] Comparative Example 5 The difference from Example 1 is that the thickness of the radiation cooling layer is set to 7 micrometers.

[0026] Comparative Example 6 The difference from Example 1 is that the thickness of the radiation cooling layer is set to 9 micrometers.

[0027] Comparative Example 7 Using an ETFE film with a thickness of 250 micrometers as the substrate, one side of the ETFE film surface is corona treated to achieve a dyne value of 48 mN / m or higher. A 3-micrometer adhesive bonding layer is printed on the corona-treated surface. Then, a patterned layer (polyurethane coating) of different shapes or colors is printed on the adhesive bonding layer, with a thickness of 10 micrometers. Next, a radiation cooling layer (organosilicon-modified acrylic, polydimethylsiloxane, polyurethane resin) with a thickness of 5 micrometers is printed on the patterned layer. Finally, a transparent cover with a thickness of 4 micrometers is printed on the radiation cooling layer to obtain the heat-insulating ETFE architectural membrane material.

[0028] Atmospheric window (8μm-13μm) band emissivity test method: The test is conducted using infrared spectroscopy. The test instrument is a Fourier transform infrared spectrometer. The infrared emissivity in the 8μm-13μm band is tested at a test interval of 5nm. The emissivity in the 8μm-13μm band is the atmospheric window emissivity.

[0029] Test method for reflectivity in the solar radiation (300nm-2500nm) band: The test was conducted in accordance with the provisions of GB / T 2680-2021, and the results are shown in Table 1.

[0030] Table 1: Atmospheric window emissivity and solar reflectivity of the products prepared in Example 1 and Comparative Examples 1-7 The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An ETFE radiative cooling architectural decorative film, characterized in that, The ETFE film includes a corona-treated ETFE film, an adhesive bonding layer printed on the corona-treated surface of the ETFE film, a radiation cooling layer printed on the adhesive bonding layer, a floral pattern layer printed on the radiation cooling layer, a transparent cover layer printed on the floral pattern layer, and the unprinted surface of the ETFE film being the light-incident surface.

2. The ETFE radiative cooling architectural decorative film according to claim 1, characterized in that, The radiation cooling layer is a resin containing silicon-oxygen bonds.

3. The ETFE radiative cooling architectural decorative film according to claim 2, characterized in that, The thickness of the ETFE film is 200-300 μm.

4. The ETFE radiative cooling architectural decorative film according to claim 3, characterized in that, The thickness of the ETFE film is 250 μm.

5. The ETFE radiative cooling architectural decorative film according to claim 1, characterized in that, The floral pattern layer is printed with a coating that has light-reflective properties.

6. The ETFE radiative cooling architectural decorative film according to claim 1, characterized in that, The thickness of the adhesive bonding layer is 2.5-3.5 μm, the thickness of the radiation cooling layer is 4.5-5.5 μm, the thickness of the floral pattern layer is 9.5-10.5 μm, and the thickness of the transparent cover is 3.5-4.5 μm.

7. The ETFE radiative cooling architectural decorative film according to claim 1, characterized in that, The thickness of the adhesive bonding layer is 3 μm, the thickness of the radiation cooling layer is 5 μm, and the thickness of the transparent cover is 4 μm.

8. The ETFE radiative cooling architectural decorative film according to claim 1, characterized in that, The transparent cover is a clear varnish cover.

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