CN116606470A - Micro-scale shutter sunshade film and preparation method thereof - Google Patents

Abstract

The invention relates to a micro-scale louver sunshade film and a preparation method thereof, comprising sequentially layered transparent substrate layers and a sunshade coating, the sunshade coating including a plurality of elongated sunshading parts and a plurality of elongated light-transmitting parts, A plurality of sunshade parts and a plurality of light-transmitting parts are arranged alternately, and the thickness and width of the sunshade parts are not less than 10 microns and not more than 100 microns. The invention achieves a heat insulation effect that does not affect daylighting in the micron-level range that cannot be detected by human eyes, and can realize a relatively high relative energy-saving rate when applied to buildings.

Description

A micro-scale louver sunshade film and its preparation method

technical field

The invention relates to a micro-scale louver sunshade film and a preparation method, and belongs to the technical field of sunshade coatings.

Background technique

Building energy saving is introduced into our country as a new concept. Most of the building shading designs at home and abroad start with shading power generation, building greening, photovoltaic shading integration, and automatic shading. In recent years, new building shadings have emerged in an endless stream. The environment, strengthening the use of solar energy, optimizing the adjustment performance, and optimizing the form of shading to optimize the indoor light environment, etc., and further improving and innovating the form of shading, the design of building shading at home and abroad presents diversification, integration, and huge In view of the globalization trend, there is still a certain gap in the micro-scale sunshade design.

Contents of the invention

The invention provides a micro-scale louver sunshade film and a preparation method, aiming to solve at least one of the technical problems in the prior art. For this reason, the present invention proposes a micro-scale louver sunshade film and a preparation method, which can achieve a heat insulation effect that does not affect daylighting in the micron-scale range that cannot be detected by the human eye, and can achieve a relatively high relative energy saving rate when applied to buildings.

The technical solution of the present invention relates to a micro-scale louver sunshade film on the one hand, including a transparent substrate layer and a sunshade coating layered in sequence, and the sunshade coating includes a plurality of strip-shaped sunshade parts and a plurality of strip-shaped In the light-transmitting part, a plurality of the sunshade parts and a plurality of the light-transmitting parts are arranged alternately; the thickness and width of the sunshade parts are not less than 10 microns and not more than 100 microns.

Further, the thickness of the sunshade part is 30 microns, and the width of the sunshade part is 60 microns.

Further, the distance between the two sunshade parts is 120 microns.

Further, the angle between the sunshade part and the transparent base material layer is 45 degrees.

Further, the sunshade part is composed of a scattering matrix and a scattering factor, and the material of the scattering matrix is polyethylene terephthalate, polymethyl methacrylate, polyurethane, high-density polyethylene, acrylonitrile-butanediene ethylene-styrene copolymer, polyvinyl alcohol, polystyrene, polycarbonate, ethylene acrylic acid copolymer, ethylene-methyl methacrylate copolymer; the scattering factor is one of inorganic particles, organic particles or pores Or a combination of two or more, the inorganic particles are one or more of titanium dioxide, silicon dioxide, zinc oxide, barium sulfate, the organic particles are polyethylene terephthalate, polymethyl Methyl acrylate, polyurethane, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polycarbonate, ethylene acrylic acid copolymer, ethylene-methyl methacrylate copolymer one or more of two.

Further, the composition material of the light-transmitting part includes polyethylene terephthalate, polymethyl methacrylate, polyurethane, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol , polystyrene, polycarbonate, ethylene acrylic acid copolymer, ethylene-methyl methacrylate copolymer.

Further, it also includes an ultraviolet absorbing layer, the ultraviolet absorbing layer is arranged on the side of the sunshade coating away from the transparent substrate layer; the ultraviolet absorbing layer is composed of a polymer matrix and an ultraviolet absorber, and the polymer The matrix is polyethylene terephthalate, polymethylmethacrylate, polyurethane, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polycarbonate, One of ethylene acrylic acid copolymer and ethylene-methyl methacrylate copolymer, the side of the ultraviolet absorbing layer away from the transparent substrate layer is modified with silicone or fluorocarbon.

Another aspect of the technical solution of the present invention relates to a method for preparing a micro-scale louver sunshade film, which is applied to the micro-scale louver sunshade film of the above-mentioned embodiment, and the method according to the present invention includes the following steps:

S1, take the transparent substrate as the transparent substrate layer;

S2. Prepare the light-transmitting slurry, form a light-transmitting layer on the transparent substrate layer through a film-forming process, and use embossing to manufacture long grooves arranged at intervals through the light-transmitting layer on the light-transmitting layer to form a plurality of elongated light-transmitting parts;

S3, mixing the scattering matrix and the scattering factor, preparing a scattering slurry, and filling the scattering slurry into the elongated groove between the two light-transmitting portions to form a plurality of elongated light-shielding portions;

S4. Steps S2-S3 are repeated until the coating of the light-shielding coating on the transparent substrate layer is completed.

Another aspect of the technical solution of the present invention relates to a glass window with a micro-scale louver sunshade film, including glass, a frame for fixing the glass, and the sunshade coating of the above embodiment; the sunshade coating is covered on the glass.

The beneficial effects of the present invention are as follows.

The micro-scale louver sunshade film of the embodiment of the present invention is arranged on the surface of the glass window with a certain period by setting the coating width, thickness and coating distance of the suitable sunshade part, and the sunshade coating acts on the surface of the glass window so that the sunlight is on the surface of the glass window. Only part of the light can pass through within a certain range, reducing the heat brought by the light to reduce the energy consumption of indoor temperature control equipment, and such a micron-level sunshade coating cannot be detected by the human eye, and it does not affect the indoor lighting conditions. Next, it achieves unity in terms of aesthetics and energy saving, and the relative energy saving rate of its micron-level sunshade coating model can reach 79.37%.

The preparation method of the micro-scale louver sunshade film in the embodiment of the present invention adopts the micro-nano imprinting method, which has the advantages of fast production speed, high efficiency and low cost. Function, by designing a specific arrangement structure, a reasonable light transmittance can be achieved, so as to achieve the shading effect under the premise of ensuring indoor light, and compared with the absorption energy-saving window film, it avoids the loss of heat after the window film absorbs heat The second pass to the room, the energy saving efficiency is higher.

The micron louver sunshade film can be constructed by pasting on the surface of the window, which can conveniently and quickly carry out sunshade transformation on old houses. The surface of the scattering sunshade film is smooth, and it is not easy to deposit dust through hydrophobic modification. Rinse or scrub.

Furthermore, additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is a first side cross-sectional schematic diagram of a micro-scale louver sunshade film according to an embodiment of the present invention.

Fig. 2 is a second side cross-sectional schematic diagram of a micro-scale louver sunshade film according to an embodiment of the present invention.

Fig. 3 is a schematic front view of the sun-shading coating of the micro-scale louver sun-shading film according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of the principle of light transmission of a sunshade coating according to an embodiment of the present invention.

Fig. 5 is a schematic flowchart of a method for preparing a micro-scale louver sunshade film according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of various test models according to an embodiment of the present invention.

Fig. 7 is a multi-model monthly mean air temperature map according to an embodiment of the present invention.

Fig. 8 is a multi-model monthly average energy consumption diagram according to an embodiment of the present invention.

Reference signs:

100 microscale louver sunshade film; 110 transparent substrate layer; 120 sunshade coating; 121 sunshade part; 122 light-transmitting part; 130 ultraviolet absorbing layer.

Detailed ways

The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

It should be noted that, unless otherwise specified, when a feature is called "fixed" or "connected" to another feature, it can be directly fixed and connected to another feature, or indirectly fixed and connected to another feature. on a feature. In addition, descriptions such as up, down, left, right, top, and bottom used in the present invention are only relative to the mutual positional relationship of the components of the present invention in the drawings.

Also, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terms used in the specification herein are for describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

It should be understood that although the terms first, second, third etc. may be used in the present disclosure to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish elements of the same type from one another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure.

Referring to Fig. 1 to Fig. 4, the micro-scale louver sunshade film of the technical solution of the present invention includes a transparent substrate layer 110 and a sunshade coating 120 layered in sequence, and the sunshade coating 120 includes a plurality of elongated sunshade parts 121 and A plurality of elongated light-transmitting parts 122, a plurality of sun-shading parts 121 and a plurality of light-transmitting parts 122 are arranged alternately, and the thickness and width of the sun-shading parts 121 are not less than 10 microns and not greater than 100 microns, so that the sun-shading coating 120 The relative energy saving rate is not less than 79%.

Referring to Fig. 1 to Fig. 3, in the tiling direction of the film, a plurality of strip-shaped sunshade parts 121 and a plurality of strip-shaped light-transmitting parts 122 are alternately arranged, that is, they are arranged repeatedly in the order of ABABAB, and the sunshade parts 121 use To shield the optical fiber, the light-transmitting portion 122 is used to transmit light, thereby forming a structure similar to a shutter. By rationally setting the thickness and width of the sunshade 121 in the range of microns, and arranging them on the surface of the glass window with a certain period, when the light irradiates on the sunshade coating 120 (see FIG. 4 ), the emitted light increases with the angle, The light is reduced until it is completely blocked by the louver structure, and the light within a certain range can be reflected from the interval, which has the effect of heat insulation and astigmatism, so that the sunlight can be in a certain range when the shading angle cannot be adjusted. Only part of the angle of light can pass through the interior, reducing the heat brought by the light to reduce the energy consumption of indoor temperature control equipment.

Furthermore, the micron-scale louver sunshade film of the embodiment of the present invention can be applied to glass, such as in the form of shutters in architecture, and in the field of electronic equipment as an application of anti-peeping film. Further, further, the micron-scale sunshade coating 120 of the embodiment of the present invention can be directly coated on the glass window to achieve the effect of heat insulation and light scattering, wherein the relative energy saving rate of the building using the micron-scale sunshade coating 120 can be the best performance. It reaches 79.37%. Compared with the relative energy saving rate of traditional buildings without sunshade coating 120 which is only 61.34% ± 10%, the heat insulation effect has been significantly improved.

In some embodiments, the width of the sunshade coating 120 in the embodiment of the present invention should be below the range that can be observed by human eyes, that is, in the microscale louver sunshade coating 120, the width H and thickness B of the sunshade part 121 are not greater than 100 microns , while considering the processing technology and material properties of the micron-scale coating, the thickness and width of the micron-scale sunshade coating 120 in the embodiment of the present invention should not be greater than 10 microns. According to the optical technology of ultra-fine louvers and the enlarged calculation of the shading coefficient outside the building, the present invention determines the optimal arrangement relationship between the sunlight irradiation angle and the effect of the sunshade coating 120, so that the sunshade coating 120 acting on the surface of the glass window is arranged in a certain period, A grating structure arranged side by side is formed so that light cannot pass through the sun-shading coating 120 within a certain angle, which reduces the reflection angle of the glass window surface and achieves the functional purpose of reducing heat transfer. And according to the year-round dynamic energy consumption under the sunshade louvers in different directions, the louver sunshade coating 120 with the best orientation is selected for longitudinal comparison to obtain the coating with the best size and arrangement period.

Referring to Fig. 1, the sunshade coating 120 of the embodiment of the present invention, the coating thickness B of the sunshade 121 is set to 30 microns, the coating width H of the sunshade 121 is set to 60 microns, the coating between the two sunshades 121 The layer distance D is set to 120 microns, and the angle between the sunshade part 121 and the transparent substrate layer 110 is 45 degrees, so that the relative energy saving rate of the sunshade coating 120 is not less than 79%, and it is difficult to distinguish with the naked eye, and it is used in sunlight , you can get a softer light environment, avoiding the glare when the sun is direct.

In some embodiments, the sunshade 121 of the embodiment of the present invention is composed of a scattering matrix and a scattering factor, and the material of the scattering matrix is polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), Polyurethane is PU, high-density polyethylene is HDPE, acrylonitrile-butadiene-styrene copolymer is ABS, polyvinyl alcohol is PVA, polystyrene is PS, polycarbonate is PC, ethylene acrylic acid copolymer is EAA, Ethylene-methyl methacrylate copolymer is one of EMMA; the scattering factor is one or more combinations of inorganic particles, organic particles or pores, and the inorganic particles are titanium dioxide, silicon dioxide, One or more of zinc oxide and barium sulfate, the organic particles are polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high-density polyethylene (HDPE) , acrylonitrile-butadiene-styrene copolymer is ABS, polyvinyl alcohol is PVA, polystyrene is PS, polycarbonate is PC, ethylene acrylic acid copolymer is EAA, ethylene-methyl methacrylate copolymer is One or more of EMMA. The sunshade 121 is the most scattering unit, adopting a multi-phase structure, including two or more phases with different refractive indices, causing a strong backscattering effect on part or the entire sunlight wavelength band.

In some embodiments, the material of the light-transmitting part 122 in the embodiment of the present invention includes polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), and high-density polyethylene (HDPE). , acrylonitrile-butadiene-styrene copolymer is ABS, polyvinyl alcohol is PVA, polystyrene is PS, polycarbonate is PC, ethylene acrylic acid copolymer is EAA, ethylene-methyl methacrylate copolymer is One of a kind in EMMA. The light-transmitting layer is made of transparent resin material, and its sunlight transmittance is greater than or equal to 60%.

In some embodiments, referring to FIG. 2 , the micro-scale louver sunshade film of the embodiment of the present invention is still provided with an ultraviolet absorbing layer 130 , and the ultraviolet absorbing layer 130 is arranged on the side of the sunshading coating 120 away from the transparent substrate layer 110 . The ultraviolet absorbing layer 130 is composed of a polymer matrix and an ultraviolet absorber, and the polymer matrix is polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high-density polyethylene (HDPE). HDPE, acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene acrylic acid copolymer (EAA), ethylene-methyl methacrylate copolymer That is, one of EMMA, the side of the ultraviolet absorbing layer 130 facing away from the transparent substrate layer 110 is modified with silicone or fluorocarbon. The surface of the ultraviolet absorbing layer 130 facing away from the transparent substrate layer 110 is modified with silicone or fluorocarbon to realize the surface hydrophobic self-cleaning property.

Referring to Figure 4, the method for preparing a micro-scale louver sunshade film according to an embodiment of the present invention at least includes the following steps:

S1. Take the transparent substrate as the transparent substrate layer 110;

S2. Prepare a light-transmitting slurry, form a light-transmitting layer on the transparent substrate layer 110 through a film-forming process, and use embossing to manufacture long grooves arranged at intervals through the light-transmitting layer on the light-transmitting layer, forming a plurality of elongated light-transmitting parts 122;

S3, mixing the scattering matrix and the scattering factor, preparing a scattering slurry, and filling the scattering slurry into the elongated groove between the two light-transmitting parts 122 to form a plurality of elongated light-shielding parts;

S4. Steps S2-S3 are repeated until the coating of the light-shielding coating on the transparent substrate layer 110 is completed.

Furthermore, the micro-scale louver sunshade film of the embodiment of the present invention is still provided with an ultraviolet absorbing layer 130, and its preparation method also includes the following steps:

S5. Prepare a UV-absorbing slurry, and form a UV-absorbing layer 130 on the light-shielding coating through a film-forming process.

The present invention conducts an actual test on the micro-scale louver sunshade coating 120. The micro-scale louver sunshade coating 120 of the embodiment of the present invention is directly coated on the glass of the exterior wall of the building, and the sunshade coating 120 is arranged on the outside of the glass. As a sunshade device for buildings, it achieves better energy-saving effects without affecting daylighting by setting the blade spacing, blade width, blade inclination angle, and blade thickness reasonably, without adjusting the inclination angle. For the traditional louvered sunshade structure, it adjusts the angle of the blades to meet different sunshading needs. It is difficult to directly block the solar radiation, and it is easy to form a heat island effect between the louvers and the peeling, and it is difficult to achieve the effect of reducing the radiant heat entering the room. Specifically, after comparing different horizontal angles (see Table 1) and technical efficiency experiment data of different window frame spacing lengths and widths, the present invention adopts a horizontal angle of 45 degrees with the best energy-saving effect, a window frame spacing aspect ratio of 2.4, and a blade The aluminum alloy fixed external louver sunshade structure with a width of 0.1 m is used as a reference for the energy-saving effect of the sunshade coating 120 of the embodiment of the present invention. In addition, four other shade models were added as reference controls.

Table 1 The annual dynamic energy consumption of the six-angle fixed external louver shading

The six sunshade models tested in the present invention are respectively (see Fig. 6): the sunshade model a is a horizontal sunshade plate made of aluminum plate with a size of 0.7m×0.9m; The vertical sunshade with PVC film has a light absorption rate of 63%; the sunshade model c is set as a photovoltaic sunshade with a sunshade coefficient of 0.4 and a photoelectric conversion rate of 20%; sunshade model d is a photovoltaic sunshade with a sunshade coefficient of 0.38 and a photoelectric conversion rate of 20%, curvature radius 0.05m, curved surface aperture photovoltaic integrated sunshade device of 0.01m; model e is an aluminum alloy fixed external louver sunshade model with a horizontal 45°, pitch length ratio of 2.4, and blade width of 0.1m; model f is an aluminum micron-scale sunshade coating model with a coating thickness of 30 μm, a coating width of 60 μm, and a coating spacing of 120 μm. Construct the model through SolidWorks and input the Energy Plus parameters, output the multi-model monthly average temperature map (see Figure 7) and the multi-model monthly average energy consumption map (see Figure 8), and obtain the performance-to-energy-saving rate of the six models (see Table 2), so that most of the sunshade models of the embodiments of the present invention can meet the requirement of 65% energy-saving rate of general residential buildings, while the relative energy-saving rate of the micron-level sunshade coating model of the embodiments of the present invention is 79.37%, which has a relatively obvious advantages of building energy efficiency.

Table 2 Relative energy saving rate of multi-model buildings

The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiment, as long as it achieves the technical effect of the present invention by the same means, within the spirit and principles of the present disclosure, any Any modification, equivalent replacement, improvement, etc., shall be included within the protection scope of the present disclosure. All should belong to the protection scope of the present invention. Various modifications and changes may be made to the technical solutions and/or implementations within the protection scope of the present invention.

Claims (10)

1. A micro-scale louver sunshade film is characterized in that it comprises a transparent substrate layer (110) and a sunshade coating (120) layered in sequence, and the sunshade coating (120) includes a plurality of strip-shaped Sunshade (121) and a plurality of elongated light-transmitting portions (122), a plurality of said sunshade portions (121) and a plurality of said light-transmitting portions (122) are alternately arranged; the sunshade portion (121) Thickness and width are not less than 10 microns and not more than 100 microns. 2. The micro-scale louver sunshade film according to claim 1, characterized in that, the thickness of the sunshade part (121) is 30 microns, and the width of the sunshade part (121) is 60 microns. 3. The micro-scale louver sunshade film according to claim 2, characterized in that the distance between the two sunshade parts (121) is 120 microns. 4. The micro-scale louver sunshade film according to claim 3, characterized in that, the angle between the sunshade part (121) and the transparent substrate layer (110) is 45 degrees. 5. The micro-scale louver sunshade film according to claim 1, wherein the sunshade part (121) is composed of a scattering matrix and a scattering factor, and the material of the scattering matrix is polyethylene terephthalate , polymethyl methacrylate, polyurethane, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polycarbonate, ethylene acrylic acid copolymer, ethylene-methacrylate Ester copolymer; the scattering factor is one or a combination of two or more of inorganic particles, organic particles or pores, and the inorganic particles are one or two of titanium dioxide, silicon dioxide, zinc oxide, and barium sulfate Above, the organic particles are polyethylene terephthalate, polymethyl methacrylate, polyurethane, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene , polycarbonate, ethylene acrylic acid copolymer, ethylene-methyl methacrylate copolymer, or one or more of them. 6. The micro-scale louver sunshade film according to claim 1, characterized in that, the composition material of the light-transmitting portion (122) comprises polyethylene terephthalate, polymethyl methacrylate, polyurethane, One of high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polycarbonate, ethylene acrylic acid copolymer, ethylene-methyl methacrylate copolymer. 7. The micro-scale louver sunshade film according to claim 1, further comprising an ultraviolet absorbing layer (130), the ultraviolet absorbing layer (130) being arranged on the sunshading coating (120) away from the transparent One side of the substrate layer (110); the UV absorbing layer (130) is made up of a polymer matrix and a UV absorber, and the polymer matrix is polyethylene terephthalate, polymethyl methacrylate , polyurethane, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, polyvinyl alcohol, polystyrene, polycarbonate, ethylene acrylic acid copolymer, ethylene-methyl methacrylate copolymer , the side of the ultraviolet absorbing layer (130) facing away from the transparent substrate layer (110) is modified with organic silicon or fluorocarbon. 8. A method for preparing a micro-scale louver sunshade film, applied to the micro-scale louver sunshade film according to any one of claims 1 to 7, said method comprising the following steps: S1. Taking the transparent substrate as the transparent substrate layer (110); S2. Prepare the light-transmitting slurry, form a light-transmitting layer on the transparent base material layer (110) through a film-forming process, and use embossing to manufacture long strips of grooves arranged at intervals through the light-transmitting layer on the light-transmitting layer grooves, forming a plurality of elongated light-transmitting parts (122); S3, mixing the scattering matrix and the scattering factor, preparing a scattering slurry, filling the scattering slurry into the elongated groove between the two light-transmitting parts (122), forming a plurality of elongated light-shielding parts; S4. Steps S2-S3 are repeated until the coating of the light-shielding coating on the transparent substrate layer (110) is completed. 9. A glass, characterized by comprising: the micro-scale louver sunshade film according to any one of claims 1-7. 10. A glass window with a microscale louver sunshade coating (120), characterized in that it comprises: Glass and frames for fixing it; The sunshade coating (120) according to any one of claims 1 to 6, wherein the sunshade coating (120) is covered on the glass.