CN115386124A - Scattering type sun-shading film and preparation method and application thereof - Google Patents

Scattering type sun-shading film and preparation method and application thereof Download PDF

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CN115386124A
CN115386124A CN202210988263.2A CN202210988263A CN115386124A CN 115386124 A CN115386124 A CN 115386124A CN 202210988263 A CN202210988263 A CN 202210988263A CN 115386124 A CN115386124 A CN 115386124A
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scattering
layer
film
holes
light
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李凯斌
杨月
李明
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She Qianpeng
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She Qianpeng
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/10—Homopolymers or copolymers of methacrylic acid esters
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/48—Stabilisers against degradation by oxygen, light or heat
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/266—Devices or accessories for making or mounting lamellar blinds or parts thereof
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/38—Other details
    • E06B9/386—Details of lamellae
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2433/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

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  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
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Abstract

The invention discloses a scattering type sunshade film which comprises a transparent substrate layer, more than one patterned array structure layer and an ultraviolet absorption layer which are sequentially layered, wherein the patterned array structure layer comprises a patterned euphotic layer with through holes uniformly arrayed on the surface and a scattering layer formed by scattering units arranged in the through holes, the solar transmittance of the patterned euphotic layer is more than or equal to 60%, the solar transmittance of the scattering layer is 3-50%, the included angle between a single scattering unit and the transparent substrate layer is 20-160 degrees on the section along the thickness direction of the film, and the integral absorption rate of the ultraviolet absorption layer to ultraviolet rays in sunlight is more than or equal to 80%. The scattering type sun-shading film is manufactured by adopting a micro-nano imprinting method, has the advantages of high production speed, high efficiency and low cost, and has extremely low transmittance to light in a specific direction by adjusting the structure of each layer of the film, thereby realizing the sun-shading effect.

Description

Scattering type sun-shading film and preparation method and application thereof
Technical Field
The invention relates to the technical field of window films, in particular to a scattering type sun-shading film and a preparation method and application thereof.
Background
Sunshade components are very common in people's daily life. The louver window is used as a common sun-shading part and is widely applied to the fields of buildings, automobiles and the like. Blinds can be generally divided into movable and fixed types. Fixed blinds can be generally classified into horizontal type and vertical type according to the extended state of the window. The window sheets are divided according to the rotating angle of the window sheets on the horizontal plane, and can be in a horizontal state or inclined by a certain angle. In some buildings, the fixed louvers exhibit a large size, also known as sunshade grids. The sunshade grid can partially block the view of indoor personnel, and the sunshade is bulky, and the cost is higher.
Disclosure of Invention
One of the objectives of the present invention is to provide a scattering type sunshade film, which has extremely low transmittance for light in a specific direction and excellent sunshade effect by matching the structures of the layers.
In order to realize the purpose, the invention adopts the following technical scheme: a scattering type sunshade film comprises a transparent substrate layer, more than one graphical array structure layer and an ultraviolet absorption layer which are sequentially layered, wherein the graphical array structure layer comprises a graphical euphotic layer provided with a plurality of through holes which are uniformly arrayed and distributed, and scattering units filled in the through holes, and the scattering units filled in the through holes form a scattering layer; the solar transmittance of the patterned light-transmitting layer is greater than or equal to 60%, the solar transmittance of the scattering layer is 3% -50%, and the overall absorption rate of the ultraviolet absorption layer to ultraviolet rays in sunlight is greater than or equal to 80%.
As a further improvement of the scattering type sun-shading film:
preferably, on a cross section along the thickness direction of the film, the included angle between the connecting line of the corresponding positions of the two planes parallel to the film flat surface in the scattering units and the transparent substrate layer where the scattering units are located is 20-160 degrees.
Preferably, the thickness of the transparent substrate layer is 5-500 micrometers, and the thickness of the patterned light-transmitting layer and the thickness of the scattering layer are both 1-2000 micrometers.
Preferably, the transparent substrate layer is made of one of PET (polyethylene terephthalate), PMMA (polymethyl methacrylate), PU (polyurethane), HDPE (high density polyethylene), ABS (acrylonitrile-butadiene-styrene) copolymer, PVA (polyvinyl alcohol), PS (polystyrene), PC (polycarbonate), EAA (ethylene acrylic acid) copolymer, EMMA (ethylene methyl methacrylate) copolymer, or glass.
Preferably, the scattering layer is composed of a scattering matrix and a scattering factor, the scattering matrix is made of one of polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high Density Polyethylene (HDPE), acrylonitrile-butadiene-styrene (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene Acrylic Acid (EAA), and ethylene-methyl methacrylate (EMMA);
the scattering factor is one or the combination of more than two of inorganic particles, organic particles or air holes, the inorganic particles are one or more than two of titanium dioxide, silicon dioxide, zinc oxide and barium sulfate, the organic particles are one or more than two of polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high-density polyethylene (HDPE), acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene acrylic acid copolymer (EAA) and ethylene-methyl methacrylate copolymer (EMMA).
Preferably, the material of the patterned light-transmitting layer is one of PET, PMMA, PU, HDPE, ABS, PVA, PS, PC, EAA, EMMA, or an ethylene-methyl methacrylate copolymer.
Preferably, the center distance in adjacent through holes in the patterned light-transmitting layer is 1-1000 microns, and the shape of the through holes is cylindrical or polygonal column type or other irregular column type.
Preferably, the ultraviolet absorption layer is composed of a polymer matrix and an ultraviolet absorber, the polymer matrix is one of polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high-density polyethylene (HDPE), acrylonitrile-butadiene-styrene (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene Acrylic Acid (EAA) and ethylene-methyl methacrylate (EMMA), and the surface of the ultraviolet absorption layer, which is far away from the transparent substrate layer, is modified by organic silicon or fluorocarbon.
The second purpose of the invention is to provide a preparation method of the scattering type sun-shading film, which comprises the following steps: the method comprises the following steps:
s1, taking a transparent base material as a transparent base material layer;
s2, preparing light-transmitting slurry, forming a light-transmitting layer on the transparent base material layer through a film forming process, and manufacturing holes which penetrate through the light-transmitting layer and are arranged in an array mode on the light-transmitting layer in an impressing mode to form a graphical light-transmitting layer;
s3, mixing the scattering matrix with the scattering factors to prepare scattering slurry, and filling the scattering slurry into the holes arranged in an array on the graphical light-transmitting layer to form a scattering layer;
or, repeating the steps S2-S3;
and S4, preparing ultraviolet absorption slurry, and forming an ultraviolet absorption layer on the scattering layer and the patterned light-transmitting layer through a film forming process.
The invention also aims to provide the application of the scattering type sunshade film on window glass for sunshade.
Compared with the prior art, the invention has the beneficial effects that:
1) The scattering type sunshade film disclosed by the invention is manufactured by adopting a micro-nano imprinting method, has the advantages of high production speed, high efficiency and low cost, has the similar function as the traditional fixed shutter, and can realize extremely low transmittance to light in a specific direction by designing a specific array structure, thereby realizing the sunshade effect.
2) The scattering type sun-shading film disclosed by the invention realizes sun shading by scattering sunlight, and avoids light pollution compared with a mirror reflection type energy-saving window film; compared with an absorption type energy-saving window film, the heat is prevented from being secondarily transferred to the indoor space after the window film absorbs heat, and the energy-saving efficiency is higher.
3) The scattering type sunshade film disclosed by the invention can be constructed by being stuck on the surface of a window, and can be used for conveniently and quickly carrying out sunshade transformation on an old house. The scattering type sun-shading film has a flat surface, is not easy to deposit dust through hydrophobic modification, and is convenient to wash or scrub even if the dust is deposited.
4) The distance between the adjacent scattering units of the patterned array structure of the scattering type sun-shading film disclosed by the invention is 1-1000 micrometers, when the size of the center distance between the two adjacent scattering units is small enough, the two adjacent scattering units are difficult to distinguish by naked eyes, and when the scattering type sun-shading film is used in the sun, a softer light environment can be obtained, and glare in direct sunlight is avoided. Meanwhile, compared with the traditional fixed shutter, the scattering type sunshade film has no abrupt feeling and is more beautiful and scientific.
5) The scattering unit of the invention is a multiphase structure, comprises two or more phases with different refractive indexes, and causes strong back scattering effect on partial or whole sunlight wave band. And one surface of the ultraviolet absorption layer, which is far away from the transparent substrate layer, is subjected to organic silicon or fluorocarbon modification, so that the surface hydrophobic self-cleaning characteristic is realized. The light transmission layer is made of transparent resin material, and the solar light transmission rate is more than or equal to 60%.
Drawings
Fig. 1 is a cross-sectional view of a light-emitting device having a single-layer array structure and a scattering unit in the shape of a quadrangular prism according to example 1 of the present invention.
Fig. 2 is a cross-sectional view showing a single-layer array structure and scattering units having a certain tilt angle in example 2 of the present invention.
Fig. 3 is a top view of a prism-shaped scattering unit having a single-layer array structure in embodiment 3 of the present invention.
Fig. 4 is a top view of the scattering unit in embodiment 4 of the present invention having a single-layer array structure and a cylindrical shape.
Fig. 5 is a schematic cross-sectional view of a window in which the film of the present invention is applied to a wall.
As shown in the figure: 1. transparent substrate layer, 2, graphical euphotic layer, 3, scattering layer, 4, ultraviolet absorbing layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail with reference to the following embodiments, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The invention provides a scattering type sunshade film, when the scattering type sunshade film comprises more than two graphical array structure layers, the thickness of the multiple graphical array structure layers, the raw material components and the proportion of a light transmitting layer and a scattering layer, and the shape, the size and the angle of a hole where a scattering unit is located can be the same or different. In the tiling direction of the film, the directions of the scattering unit arrays arranged in the plurality of patterned array structure layers can be the same or form a certain included angle. The shape of the holes in which the scattering units are located can be cylindrical or polygonal column-shaped or other irregular column-shaped. When the graphical array structure layer is prepared, a light-transmitting slurry is firstly used for forming a film on the transparent substrate layer, then a hole penetrating through the light-transmitting slurry film is manufactured on the light-transmitting slurry film to form a light-transmitting layer, and then scattering slurry is used for filling the hole to form a scattering layer; or, firstly, the scattering slurry is used for forming a film on the transparent substrate layer, then the patterned holes which penetrate through the film and are arranged in an array mode are manufactured on the film to form the scattering layer, and then the light-transmitting slurry is used for filling the patterned holes to form the light-transmitting layer.
Example 1
The embodiment provides a scattering type sunshade film, the cross section of the structure of which is shown in fig. 1, and the film is composed of a transparent substrate layer 1, a graphical array structure layer and an ultraviolet absorption layer 4 which are sequentially layered, wherein the graphical array structure layer is composed of a graphical euphotic layer 2 provided with through holes uniformly arrayed and arranged and scattering units arranged in the through holes, the scattering units in the through holes form a scattering layer 3, the scattering units are quadrangular, and the scattering units are perpendicular to the transparent substrate layer 1 on the cross section of the sunshade film in the thickness direction. The thickness of the transparent substrate layer is 100 microns, the thickness of the patterned array structure layer is 200 microns, and the thickness of the ultraviolet absorption layer is 30 microns. The width W of the scattering unit is 20 micrometers, the thickness H is 200 micrometers, and the center-to-center distance P (period) between two adjacent scattering units is 100 micrometers.
The preparation method of the scattering type sun-shading film comprises the following steps:
s1, taking PET with the thickness of 100 microns as a transparent substrate layer 1;
s2, transferring the light-transmitting slurry PMMA to the transparent base material layer 1 through a scraper coating film-forming process to form a light-transmitting layer, wherein the thickness of the light-transmitting layer is 200 micrometers, holes which penetrate through the light-transmitting layer and are arranged in an array mode are manufactured in the light-transmitting layer in an ultraviolet imprinting mode, the holes are long prism-shaped, the width W of the holes is 20 micrometers, and a patterned light-transmitting layer 2 is formed;
s3, mixing a scattering matrix PMMA with titanium dioxide nanoparticles with the average scattering factor particle size of 800nm, wherein the ratio of titanium dioxide to the mixed mass is 3wt%, preparing scattering slurry, and filling the scattering slurry into holes of the patterned light-transmitting layer in array arrangement to form a scattering layer 3;
and S4, forming an ultraviolet absorption layer 4 with the thickness of 30 microns on the finally formed scattering layer 3 and the patterned light-transmitting layer 2 through a scraper coating process by using ultraviolet absorption slurry containing 5% of an ultraviolet absorbent by mass. Curing after 10 minutes of ultraviolet light. The outer surface is modified by organic silicon to form a scattering type sunshade film.
Example 2
The embodiment provides a scattering formula solar film, the cross-section of its structure is as shown in fig. 2, by transparent substrate layer 1, graphical array structure layer and the ultraviolet absorption layer 4 of layering in proper order and listed as, wherein graphical array structure layer comprises the graphical euphotic layer 2 that is provided with the through-penetration hole that even array was arranged and the scattering unit who sets up in a plurality of through-penetration holes, the scattering unit in a plurality of through-penetration holes constitutes scattering layer 3, the shape of scattering unit is the quadrangular type, on the cross-section of solar film thickness direction, the contained angle of scattering unit and transparent substrate layer 1 is 120 degrees. The outer surface of the ultraviolet absorption layer 4 facing away from the transparent substrate layer 1 is modified by silicone. The thickness of the transparent substrate layer 1 is 100 micrometers, the thickness of the patterned array structure layer is 200 micrometers, and the thickness of the ultraviolet absorption layer is 30 micrometers. The width W of the scattering unit is 25 micrometers, the thickness H is 200 micrometers, and the pitch P (i.e., period) between two adjacent scattering units is 150 micrometers.
The components and the component ratios of the structural layers in the film of this embodiment are the same as those in embodiment 1, and the specific preparation method is as in embodiment 1, except that the sizes of the scattering units and the holes in which the scattering units are located, the center-to-center distances P (i.e., periods) between two adjacent scattering units, and the included angles between the scattering units and the transparent substrate layer 1 are different.
Example 3
The embodiment provides a scattering type sun-shading film, a top view of which is shown in fig. 3, and the scattering type sun-shading film structurally comprises a transparent substrate layer 1, a graphical array structure layer and an ultraviolet absorption layer 4 which are sequentially layered, wherein the graphical array structure layer comprises a graphical euphotic layer 2 provided with through holes which are uniformly arrayed and distributed, and scattering units arranged in the through holes, the scattering units in the through holes form a scattering layer 3, and the shape of the scattering units is a rectangular quadrangular prism. On the cross section of the sunshade film in the thickness direction, the scattering units are perpendicular to the transparent substrate layer 1. The thickness of the transparent substrate layer is 100 micrometers, the thickness of the patterned array structure layer is 200 micrometers, and the thickness of the ultraviolet absorption layer is 30 micrometers. The width W of the scattering unit is 30 microns, the thickness H is 200 microns, and the center-to-center distance P (i.e., period) between two adjacent scattering units is 120 microns.
The components and the component ratios of the structural layers in the film of this embodiment are the same as those in embodiment 1, and the specific preparation method is as in embodiment 1, except that the sizes of the scattering units and the holes where the scattering units are located, and the center-to-center distances P (i.e., the periods) between two scattering units of adjacent scattering units are different.
Example 4
The embodiment provides a scattering type sun-shading film, the top view of which is shown in fig. 4, and the scattering type sun-shading film structurally comprises a transparent substrate layer 1, a graphical array structure layer and an ultraviolet absorption layer 4 which are sequentially layered, wherein the graphical array structure layer comprises a graphical euphotic layer 2 provided with through holes which are uniformly arrayed and arranged and scattering units arranged in the through holes, the scattering units in the through holes form a scattering layer 3, and the scattering units are cylindrical. On the cross section of the sunshade film in the thickness direction, the scattering units are perpendicular to the transparent substrate layer 1. The thickness of the transparent substrate layer is 100 microns, the thickness of the patterned array structure layer is 200 microns, and the thickness of the ultraviolet absorption layer is 30 microns. The diameter W of the scattering unit is 300 micrometers, the thickness H is 200 micrometers, and the center-to-center distance P (period) between two adjacent scattering units is 360 micrometers.
The components and the component ratios of the structural layers in the film of this embodiment are the same as those in embodiment 1, and the specific preparation method is as in embodiment 1, except that the sizes of the scattering units and the holes where the scattering units are located, and the center-to-center distances P (i.e., the periods) between two scattering units of adjacent scattering units are different.
The solar protection films of examples 1-4 were attached to windows, respectively, and the total solar transmittance was different when the incident light was at different angles to the film plane. When the overall solar light transmittance in a certain incident direction is defined to be higher than 50%, the solar light is considered to be transparent. The ultraviolet-visible near-infrared spectrophotometer with an integrating sphere is adopted to test the integral solar light transmittance of the film under different incident angles, and the characterization data of the sun-shading film in each embodiment are shown in the following table. Meanwhile, the results of characterizing the contact angle of the film after hydrophobic treatment with water are also shown in the following table.
TABLE 1 test of light transmission and hydrophilicity of the scattering type solar protection films obtained in examples 1 to 4
Figure BDA0003802902100000081
As can be seen from table 1 above, the scattering type sun-shading film of example 1 transmits light in the angle range of-32 ° - +33 ° in the vertical plane and the angle range of-72 ° - +75 ° in the horizontal plane, which indicates that the scattering type sun-shading film has a good sun-shading effect on the incident sunlight in the vertical plane and has a poor sun-shading effect on the incident sunlight in the horizontal plane. The contact angle of the film and water is 125 degrees, which shows that the film has better self-cleaning property.
The scattering type sunshade film of embodiment 2 transmits light in the angle range of-2 to +55 degrees of the vertical plane and the angle range of-51 to +50 degrees of the horizontal plane, which shows that the scattering type sunshade film has a good sunshade effect on the sunlight incident in the vertical plane, and realizes the sunshade at a specific angle through the structural design. The sun-shading effect on the sunlight incident in the horizontal plane is poor. The contact angle of the film and water is 125 degrees, which shows that the film has better self-cleaning property.
The scattering type sun-shading film of embodiment 3 transmits light in the angle range of-35 to +37 degrees of the vertical plane and the angle range of-36 to +34 degrees of the horizontal plane, and the film shows a good sun-shading effect on the incident sunlight in both the vertical plane and the horizontal plane. With this typical periodic structure, it is possible to realize a wider angle of sunshade than that of embodiment 1, thereby realizing a better sunshade effect.
The scattering type sun-shading film of embodiment 4 transmits light in the angle range of-38 to +35 degrees in the vertical plane and in the angle range of-37 to +39 degrees in the horizontal plane, and the film exhibits a good sun-shading effect on both the incident sunlight in the vertical plane and the incident sunlight in the horizontal plane. With this typical periodic structure, it is possible to realize a wider angle of shading than that of embodiment 1, thereby realizing a better shading effect.
On the section of the scattering type sun-shading film, when the angle (such as the angle phi in fig. 5) formed by the incident direction of the light and the extending direction perpendicular to the transparent substrate layer 1 in a single scattering unit is small, most of the incident light can pass through the graphical euphotic layer 2 in the graphical array structure layer when passing through the film, so that high transmittance is realized; when the angle formed by the incident direction and the scattering unit is larger, more light rays irradiate the scattering unit in the patterned array structure layer, and are then back-scattered, so that lower light transmittance is shown.
It should be understood by those skilled in the art that the foregoing is only illustrative of several embodiments of the invention, and is not an exhaustive list. It should be noted that many variations and modifications are possible to those skilled in the art, and all variations and modifications that do not depart from the scope of the invention as set forth in the claims should be deemed to be a part of the present invention.

Claims (10)

1. A scattering type sun-shading film is characterized by comprising a transparent substrate layer (1), more than one graphical array structure layer and an ultraviolet absorption layer (4) which are sequentially layered, wherein the graphical array structure layer comprises a graphical euphotic layer (2) provided with a plurality of through holes which are uniformly arrayed and distributed and scattering units filled in the through holes, and the scattering units filled in the through holes form a scattering layer (3); the solar transmittance of the patterned light-transmitting layer (2) is greater than or equal to 60%, the solar transmittance of the scattering layer (3) is 3% -50%, and the overall absorption rate of the ultraviolet absorption layer (4) to ultraviolet rays in sunlight is greater than or equal to 80%.
2. The scattering solar protection film as claimed in claim 1, wherein, in a cross section along the thickness direction of the film, the angle between the line connecting the corresponding positions of the scattering units on two planes parallel to the film decking and the transparent substrate layer (1) on which the scattering units are located is 20-160 degrees.
3. The scattering solar shading film according to claim 1, wherein the thickness of the transparent substrate layer (1) is 5-500 microns, and the thickness of the patterned light transmitting layer (2) and the thickness of the scattering layer (3) are both 1-2000 microns.
4. The scattering type sun-shading film according to claim 1, wherein the material of the transparent substrate layer (1) is one of polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high Density Polyethylene (HDPE), acrylonitrile-butadiene-styrene (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene Acrylic Acid (EAA), ethylene-methyl methacrylate (EMMA), or glass.
5. The scattering type sunshade film according to claim 1, wherein said scattering layer (3) is composed of scattering substrate and scattering factor, said scattering substrate is made of one of polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high Density Polyethylene (HDPE), acrylonitrile-butadiene-styrene (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene Acrylic Acid (EAA), ethylene-methyl methacrylate (EMMA);
the scattering factor is one or the combination of more than two of inorganic particles, organic particles or air holes, the inorganic particles are one or more than two of titanium dioxide, silicon dioxide, zinc oxide and barium sulfate, the organic particles are one or more than two of polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high-density polyethylene (HDPE), acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene acrylic acid copolymer (EAA) and ethylene-methyl methacrylate copolymer (EMMA).
6. The scattering type sun-shading film according to claim 1, wherein the material of the patterned light-transmitting layer (2) is one of PET (polyethylene terephthalate), PMMA (polymethyl methacrylate), PU (polyurethane), HDPE (high density polyethylene), ABS (acrylonitrile-butadiene-styrene copolymer), PVA (polyvinyl alcohol), PS (polystyrene), PC (polycarbonate), EAA (ethylene acrylic acid copolymer), and EMMA (ethylene methyl methacrylate copolymer).
7. The scattering solar protection film as claimed in claim 1, wherein the distance between centers of adjacent through holes in the patterned transparent layer (2) is 1-1000 μm, and the through holes are cylindrical or polygonal-prism or other irregular-column shapes.
8. The scattering type sun-shading film according to claim 1, wherein the ultraviolet absorption layer (4) is composed of a polymer matrix and an ultraviolet absorber, the polymer matrix is one of polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polyurethane (PU), high Density Polyethylene (HDPE), acrylonitrile-butadiene-styrene (ABS), polyvinyl alcohol (PVA), polystyrene (PS), polycarbonate (PC), ethylene Acrylic Acid (EAA) and ethylene-methyl methacrylate (EMMA), and the surface of the ultraviolet absorption layer (4) far away from the transparent substrate layer (1) is modified by organic silicon or fluorocarbon.
9. A method for preparing the scattering type sunshade film of any one of claims 1 to 8, comprising the steps of:
s1, taking a transparent base material as a transparent base material layer (1);
s2, preparing light-transmitting slurry, forming a light-transmitting layer on the transparent base material layer (1) through a film forming process, and manufacturing holes which penetrate through the light-transmitting layer and are arranged in an array mode on the light-transmitting layer in an impressing mode to form a patterned light-transmitting layer (2);
s3, mixing the scattering matrix with the scattering factors to prepare scattering slurry, and filling the scattering slurry into holes arranged in an array on the graphical euphotic layer (2) to form a scattering layer (3);
or, repeating the steps S2-S3;
s4, preparing ultraviolet absorption slurry, and forming an ultraviolet absorption layer (4) on the scattering layer (3) and the patterned light-transmitting layer (2) through a film forming process.
10. Use of the scattering solar protection film according to any of claims 1 to 8 for shading the window pane.
CN202210988263.2A 2022-08-17 2022-08-17 Scattering type sun-shading film and preparation method and application thereof Pending CN115386124A (en)

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Applications Claiming Priority (1)

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