CN117555060B - Coated reflecting film based on multi-morphology particle coating and preparation method thereof - Google Patents
Coated reflecting film based on multi-morphology particle coating and preparation method thereof Download PDFInfo
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a coating reflective film based on a multi-morphology particle coating and a preparation method thereof, wherein a white poly-p-xylylene glycol film is used as a reflective substrate, and the multi-morphology particle coating is arranged on the reflective substrate. The multi-morphology particle coating comprises one-dimensional nano materials, three-dimensional polymer particles, a leveling agent, an antistatic agent, an adhesive and a curing agent. Firstly, pre-dispersing a one-dimensional nano material and three-dimensional polymer particles into an ethanol solvent, then mixing and dispersing a pre-dispersing liquid, an adhesive, a leveling agent, an antistatic agent, a curing agent and the like to prepare a coating liquid, and coating the coating liquid on a substrate through a coating process to prepare the coating reflective film based on the multi-morphology particle coating. Through the filling of the one-dimensional nano material, the three-dimensional polymer particles can be uniformly distributed on the surface of the coating to form a coating with special appearance and excellent performance, so that the reflecting film has the advantages of scratch resistance, high compression resistance, high tensile strength and heat resistance.
Description
Technical Field
The invention relates to the technical field of optical reflection films, in particular to a coating reflection film based on a polymorphic particle coating and a preparation method thereof.
Background
Liquid Crystal Display (LCD) panels are widely used in large-sized display fields such as liquid crystal televisions, communication devices, etc. because of their advantages of small power consumption, low operating voltage, long life, low radiation, etc., and occupy a major share in global display panels. However, at present, the market of the traditional large-size display industry tends to be stable, and the growth speed is slow. The medium and small-sized display products are increasingly widely applied to work and life of people, such as notebook computers, tablet computers, mobile phones, vehicle-mounted displays, intelligent watches, digital cameras, medical displays and the like, and the development speed is very rapid.
The medium and small size products are usually side entry models with unique backlight configurations, where the LED beads are usually placed on the sides of the screen, allowing for thinner panels. However, the side-entering structure may cause uneven light, and cannot realize local dimming, so that the light needs to be uniformly distributed by means of the light guide plate, and then the light passes through the liquid crystal panel layer to realize display. With the continuous progress of technology, the middle and small size display industry is developing towards a larger screen and lighter body. The manufacturers make the light guide plate thinner, which puts higher scratch resistance requirements on the reflective film material on the lower side of the light guide plate. The traditional method is to coat particles or glue on the reflecting film, but the surface morphology of the coating is not required by specification, and the irregular and disordered particles can scratch the light guide plate in the process of assembling or transporting the backlight module, so that the backlight module has bad bright spots in linear shapes and the like. Meanwhile, the coated particles may be subjected to the gravity of the light guide plate, and excessively deformed, so that white spots at the top of the backlight module are caused. Therefore, the appearance and the types of the coating particles play a key role in the performance of the reflecting film, and the invention combines the advantages of the one-dimensional nano material and the three-dimensional polymer particles, so that the surface coating can be better matched with the light guide plate, the white reflecting film suitable for medium and small-size display products is prepared, and the performances of scratch resistance, high compression resistance, heat resistance, high tensile strength and the like are endowed.
Disclosure of Invention
The invention aims to provide a coating reflecting film based on a polymorphic particle coating and a preparation method thereof, and aims to solve the problems of scraping a light guide plate, poor compression resistance and poor tensile strength of the surface coating reflecting film and relieve the aggregation and sedimentation phenomenon of coating liquid.
The invention is realized by the following technical scheme.
In one aspect, the present invention provides a coated reflective film based on a multi-morphology particle coating, characterized by: the reflective film includes a reflective substrate and a multi-morphology particle coating (as shown in fig. 1).
The reflective substrate is a white poly (p-xylylene glycol) film and has an ABA three-layer structure.
The multi-morphology particle coating comprises one-dimensional nano materials, three-dimensional polymer particles, a leveling agent, an antistatic agent, an adhesive and a curing agent.
Further, the multi-morphology particle coating is formed by solidifying coating liquid, and comprises the following components in percentage by mass:
one-dimensional nanomaterial: 1.37 to 12.6 percent wt percent
Three-dimensional polymer particles: 1.37 About 12.6. 12.6wt%
And (3) an adhesive: 40.0-41.0 wt%
Curing agent: 3.6 to 4.2 percent wt percent
Leveling agent: 0.1 to 0.3 percent wt percent
Antistatic agent: 1.0 to 2.0 percent wt percent
Solvent: the balance being solvent.
The three-dimensional polymer particles comprise at least one of polymethyl methacrylate (PMMA), polybutyl methacrylate (PBMA), polyamide (PA) or Polyurethane (PU), and have ellipsoidal or spherical structures with the particle size of 3-20 mu m.
Preferably, the three-dimensional polymer particles are one or more of PBMA or PA particles; the three-dimensional polymer particles have proper structure and flexibility, and can meet the scratch resistance and high compression resistance effects of the reflecting film.
The leveling agent comprises one of organic siloxane and acrylic ester, preferably organic siloxane.
The antistatic agent is one of polyether or quaternary ammonium salt.
The adhesive comprises at least one of acrylic resin adhesive, organic silicon resin adhesive and polyurethane resin adhesive.
The curing agent comprises at least one of isocyanate, epoxy resin, methyl phenolic resin, amino resin and dicyandiamide.
Preferably, the ratio of the adhesive to the curing agent is 9:1-11:1 in parts by mass, and the excessive/insufficient addition of the curing agent may cause the adhesive to cure too quickly/slowly, which may result in poor curing effect and reduced product quality.
The solvent comprises any one group of mixed solvents of ethanol and ethyl acetate, ethanol and butyl acetate, and ethanol and butanone, and the proportion of the ethanol in the mixed solvents is less than or equal to 50 percent.
Further, the one-dimensional nanomaterial refers to a nanomaterial with a three-dimensional structure, wherein a certain dimension is not between 0.1 and 100 and nm, the nanomaterial has a fiber structure and a relatively large length-diameter ratio, and the ratio of the length to the diameter is between 0.5 and 400; preferably, the one-dimensional nanomaterial is selected from nanomaterial with diameter of 5-60 nm and length of 100-1000 nm, and comprises nanocellulose and titanium dioxide (TiO 2 ) Nanotubes, zinc oxide (ZnO) nanorods, aluminum oxide (Al) 2 O 3 ) At least one of the nanowires; preferably, the one-dimensional nanomaterial is nanocellulose.
Preferably, the one-dimensional nanomaterial has a fiber structure and a larger length-diameter ratio, the ratio of the length to the diameter is far greater than 1, and the diameter is generally in the nanometer size range, so that the one-dimensional nanomaterial has excellent mechanical and thermal properties.
The multi-morphology particle coating-based coating reflecting film fully utilizes the structural characteristics of the one-dimensional nano material, on one hand, the one-dimensional material has larger length-diameter ratio and is equivalent to a filler, and the particles are fully and uniformly dispersed through stirring, so that polymer particle aggregation is avoided; on the other hand, nanocellulose has abundant surface hydroxyl groups on the surface, while the polymer particles have N, O and other elements on the surface, and intermolecular interaction forces such as hydrogen bonds are formed between the polymer particles.
Therefore, through intermolecular interaction and physical stirring dispersion, the one-dimensional particles and the three-dimensional polymer particles are uniformly dispersed in the coating liquid, so that aggregation and disordered distribution of the particles are avoided, and the scratch resistance and the high compression resistance of the reflecting film are improved.
In addition, the nanocellulose has the advantages of higher mechanical strength, structural flexibility, thermal stability and the like, and has great advantages in the aspect of constructing a multi-morphology particle coating. The nanocellulose is used as a common filling material, so that the mechanical property of the reflecting film can be enhanced; meanwhile, the nano cellulose also has good high temperature resistance, and can keep the mechanical property and chemical stability in a high-temperature environment. Therefore, the multi-morphology particle coating formed therefrom can improve the tensile strength of the reflective substrate and the heat resistance under high temperature environment.
The dimension of the one-dimensional nano material is far smaller than that of the three-dimensional polymer particles, the one-dimensional nano material has good compatibility with the solvent and the adhesive, can be uniformly dispersed in a system, and can not influence the original performance of the reflecting base film after being added.
The one-dimensional nano material and the three-dimensional polymer particles are dispersed in the adhesive, and are adhered to the surface of the base film by the crosslinking effect of the adhesive and the reflecting base film.
In another aspect, the present invention provides a method for preparing a coated reflective film based on a multi-morphology particle coating, comprising the steps of:
(1) Dispersing one-dimensional nano materials and three-dimensional polymer particles in an ethanol solvent, controlling the mass ratio of the one-dimensional nano materials to the three-dimensional polymer particles to be 1:1.5-1:3, then placing the mixture in a closed container, magnetically stirring the mixture at normal temperature at 50-200 rpm for 5-30 min, and uniformly stirring the mixture to obtain a pre-dispersed solution;
(2) Dispersing the pre-dispersion solution, the adhesive, the leveling agent, the antistatic agent and the curing agent into a solvent in turn, and uniformly stirring to obtain a suspension, wherein the suspension is used as a final coating liquid;
(3) Coating the obtained coating liquid on the surface of a substrate through an anilox bar, and performing heat curing through an oven to form a multi-morphology particle adhesive layer; the temperature of the thermal curing is controlled between 100 and 125 ℃ and the reaction time is 1 to 3 minutes.
The beneficial effects are that: compared with the traditional glue-coated and particle-coated reflective films, the reflective film comprises a reflective substrate and the multi-morphology particle coating, wherein the multi-morphology particle coating combines the advantages of one-dimensional nano materials and three-dimensional polymer particles, can effectively improve the use effect of the reflective film in side-entry type models, and is suitable for medium-and small-size display applications. The three-dimensional polymer particles are mainly of ellipsoidal or spherical structures, so that the light guide plate can be prevented from being scratched;
in addition, the one-dimensional nano material is a nano belt, a nano wire, a nano rod and the like with a fiber structure, and particularly, the nano cellulose serving as cellulose with a special form has the advantages of safety, no toxicity, wide sources, degradability and the like, and has the advantages of high mechanical strength, structural flexibility, adjustable self-assembly behavior and the like due to the unique structural characteristics of high length-diameter ratio, large specific surface energy, rich functional groups and the like, and has great advantages in the aspect of constructing multi-morphology coating particles. On one hand, the nanocellulose has abundant surface hydroxyl groups and larger length-diameter ratio, and can be uniformly dispersed with the coating liquid through intramolecular or intermolecular interaction to relieve aggregation and sedimentation phenomena of polymer particles; in addition, the one-dimensional nanocellulose has anisotropic morphology, can form a multi-morphology particle coating with a network structure with three-dimensional polymer particles, can enable the polymer particles to be distributed more uniformly, prevent the coated particles from agglomerating, improve the scratch resistance of the reflecting film, and promote the suitability of the reflecting film and the light guide plate; the functional groups on the surface of the nanocellulose provide various possibilities for chemical modification, so that more sites are provided for crosslinking among structural units, interaction is enhanced, the nanocellulose has high mechanical strength, and the nanocellulose can be used as an excellent filling material to enhance the mechanical properties of the reflecting film; the nano cellulose has good high temperature resistance, can keep the mechanical property and the chemical structure stability in a high temperature environment, and the multi-morphology particle coating reflecting film formed by the nano cellulose can reduce the heat shrinkage rate of the reflecting base material in the high temperature environment.
Drawings
FIG. 1 is a schematic diagram of a coated reflective film based on a multi-morphology particle coating.
Fig. 2 example 1 LGP electron micrograph of a coated reflective film based on a multi-morphology particle coating after scratching.
Fig. 3 is a schematic diagram of a conventional coated reflective film.
Fig. 4 is an LGP electron micrograph of a conventional coated reflective film of comparative example 1 after scratching.
Detailed Description
The invention is further described below in connection with the following detailed description.
In the present invention, all the equipment and raw materials are commercially available or commonly used in the industry, and the methods in the following examples are conventional in the art unless otherwise specified.
Example 1
The invention provides a coating reflective film based on a polymorphic particle coating and a preparation method thereof. The one-dimensional nano material is nano cellulose (the product of North century (Jiangsu) cellulose material limited company, the specific chemical properties are as follows: diameter 5-20 nm, length 100-1000 nm, purity 99.9%, crystallinity 75%), the ratio of length to diameter is 0.5-200; a coated reflective film based on a multi-morphology particle coating and a method of making the same, comprising the steps of:
step one: according to parts by weight, dispersing 7 parts of nano cellulose and 11 parts of PA particles (with the particle size of 8 mu m) in 50 parts of ethanol, and uniformly stirring to obtain a pre-dispersion solution;
step two: sequentially adding the pre-dispersion solution prepared in the step one, 88 parts of polyacrylic acid adhesive, 0.4 part of flatting agent, 3.3 parts of antistatic agent and 9 parts of isocyanate curing agent into 50 parts of ethyl acetate, and uniformly stirring to obtain a viscous solution, namely coating liquid;
step three: coating the coating liquid obtained in the second step on the surface of the reflecting substrate layer through an anilox bar, and thermally curing the coating liquid for 2 min at 120 ℃ in an oven to form a multi-morphology particle coating, so as to obtain a reflecting film based on the multi-morphology particle coating, wherein the structure of the obtained film is shown in figure 1;
after scratch test, the light guide plate structure is shown in fig. 2;
a coating solution was prepared in the same manner, and the coating solution was allowed to stand for 30 minutes to observe the coagulation.
Example 2
The coated reflective film based on a multi-morphology particle coating as provided in embodiment 1, wherein the one-dimensional nanomaterial is TiO 2 A nanotube.
Example 3
The coated reflective film based on a multi-morphology particle coating provided in example 1, wherein the one-dimensional nanomaterial is ZnO nanorods.
Example 4
The coated reflective film based on a multi-morphology particle coating as provided in embodiment 1, wherein the one-dimensional nanomaterial is Al 2 O 3 A nanowire.
Example 5
The coated reflective film based on a multi-morphology particle coating as provided in example 1, wherein the three-dimensional polymer particles are PMMA particles.
Example 6
The coated reflective film based on a multi-morphology particle coating as provided in example 1, wherein the three-dimensional polymer particles are PBMA particles.
Example 7
The coated reflective film based on a multi-morphology particle coating provided in example 1, wherein the three-dimensional polymer particles are PU particles.
Example 8
The coated reflective film based on the multi-morphology particle coating provided in example 1, wherein the nanocellulose was 15 parts and the PA particles were 3 parts, the ratio of the two was 1:0.2 in parts by weight.
Example 9
The coated reflective film based on the multi-morphology particle coating provided in example 1, wherein the nanocellulose was 3 parts, the PA particles were 15 parts, and the ratio of the two was 1:5 by weight.
Example 10
The coated reflective film based on a multi-morphology particle coating as provided in example 1, wherein the particle size of the three-dimensional polymer particles is 20 μm.
Example 11
The coated reflective film based on a multi-morphology particle coating as provided in example 1, wherein the particle size of the three-dimensional polymer particles is 3 μm.
Example 12
The coated reflective film based on a multi-morphology particle coating provided in example 1, wherein the nanocellulose has a diameter of 5-60 a nm a length of 1000-2000 a nm a ratio of length to diameter of 50/3-400 a.
Example 13
The coated reflective film based on a multi-morphology particle coating provided in example 1, wherein the nanocellulose has a diameter of 5 to 20 nm and a length of 20 to 100 nm, the ratio of length to diameter being 1 to 20.
Example 14
The invention provides a coating reflective film based on a polymorphic particle coating and a preparation method thereof. The one-dimensional nano material is nano cellulose (the product of North century (Jiangsu) cellulose material limited company, the specific chemical properties are as follows: diameter 5-20 nm, length 100-1000 nm, purity 99.9%, crystallinity 75%), the ratio of length to diameter is 0.5-200; a coated reflective film based on a multi-morphology particle coating and a method of making the same, comprising the steps of:
step one: 3 parts of nano cellulose and 9 parts of PA particles (with the particle size of 8 mu m) are dispersed in 50 parts of ethanol according to parts by weight, and a pre-dispersion solution is obtained after uniform stirring;
step two: sequentially adding the pre-dispersion solution prepared in the step one, 87.5 parts of polyacrylic acid adhesive, 0.2 part of flatting agent, 2.2 parts of antistatic agent and 7.8 parts of isocyanate curing agent into 59 parts of ethyl acetate, and uniformly stirring to obtain a viscous solution, namely coating liquid;
step three: coating the coating liquid obtained in the second step on the surface of the reflecting substrate layer through an anilox bar, and thermally curing the coating liquid for 2 min at 120 ℃ in an oven to form a multi-morphology particle coating, thereby obtaining a reflecting film based on the multi-morphology particle coating;
a coating solution was prepared in the same manner, and the coating solution was allowed to stand for 30 minutes to observe the coagulation.
Example 15
The invention provides a coating reflective film based on a polymorphic particle coating and a preparation method thereof. The one-dimensional nano material is nano cellulose (the product of North century (Jiangsu) cellulose material limited company, the specific chemical properties are as follows: diameter 5-20 nm, length 100-1000 nm, purity 99.9%, crystallinity 75%), the ratio of length to diameter is 0.5-200; a coated reflective film based on a multi-morphology particle coating and a method of making the same, comprising the steps of:
step one: 3 parts of nano cellulose and 4.5 parts of PA particles (with the particle size of 8 mu m) are dispersed in 50 parts of ethanol according to parts by weight, and a pre-dispersion solution is obtained after uniform stirring;
step two: sequentially adding the pre-dispersion solution prepared in the step one, 89.7 parts of polyacrylic acid adhesive, 0.6 part of flatting agent, 4.4 parts of antistatic agent and 9.2 parts of isocyanate curing agent into 57 parts of ethyl acetate, and uniformly stirring to obtain a viscous solution, namely coating liquid;
step three: coating the coating liquid obtained in the second step on the surface of the reflecting substrate layer through an anilox bar, and thermally curing the coating liquid for 2 min at 120 ℃ in an oven to form a multi-morphology particle coating, thereby obtaining a reflecting film based on the multi-morphology particle coating;
a coating solution was prepared in the same manner, and the coating solution was allowed to stand for 30 minutes to observe the coagulation.
Comparative example 1
The reflective film of example 1 was not added with one-dimensional nanomaterial, i.e., 0 part of nanocellulose, 11 parts of polymer particles, and the remainder was the same as in example 1. The schematic diagram of the structure of the obtained membrane is shown in fig. 3;
after scratch testing, the light guide plate structure is shown in FIG. 4.
Comparative example 2
The reflective film of example 1 was not added with three-dimensional polymer particles, i.e., 7 parts of nanocellulose, 0 part of polymer particles, and the rest was the same as in example 1.
The properties of the coated reflective films based on the polymorphous particle coating obtained in the examples and comparative examples were evaluated as follows:
(1) Scratch test: and (3) attaching a 20 mm reflecting film to a sample table of a steel wool friction-resistant testing machine, respectively placing 500 g load weights above the reflecting film, rubbing the coating of the reflecting film back and forth against the light guide plate, and repeating 50 cycles at the speed of 13 mm/s. Then observing and comparing the friction front and rear areas of the light guide plate by using USB Digital Microscope;
severe line scratches were poor, line scratches were good, no obvious scratches were good;
(2) Compression test: assembling the reflecting film into a backlight module, pressing the backlight module by adopting a push-pull force meter, and recording the pressure indication when white spots appear but the critical points do not appear;
(3) Tensile strength test: referring to GB/T13542.4-2009, tensile strength tests are carried out by an electronic universal material testing machine, and data in MD and TD directions are respectively tested. MD refers to a direction parallel to film production, TD refers to a direction perpendicular to film production;
(4) Heat shrinkage test: referring to GB/T12027-2004, 3 120 x 120 mm samples were taken and 100 x 100 mm areas were drawn in the film, indicating the MD and TD directions. The pre-test dimensions were measured separately with a 2.5-dimensional (CNC image tester). The sample was placed in an oven at 85℃and laid flat for 30 min. After the heating was completed, the sample was taken out and the post-test dimensions were measured. Heat shrinkage = (pre-test-post-test size)/pre-test size 100%;
(5) Coating solution coagulation condition: the coating solution was allowed to stand for 30 minutes, and the coagulation was observed. Severe coagulation was poor, slight coagulation was good, no apparent coagulation was good.
The results of each performance test are shown in Table 1.
Table 1 test results for examples 1 to 15 and comparative examples 1 to 2
Examples 1 to 4 examine different nanomaterials (nanocellulose, tiO 2 Nanotube, znO nanorod, al 2 O 3 Nanowires) are used as one-dimensional nanomaterial doped coatings to influence the performance of the reflective film, and the one-dimensional nanomaterial is found to play a key role in the tensile strength of the reflective film, and the nanocellulose is found to have the most obvious effect in improving the tensile strength of the reflective film.
Example 1 and examples 5, 6 and 7 examined the effect of the doped coating of different three-dimensional polymer particles on the performance of the reflective film, and found that the polymer particles mainly affect the scratch resistance and compression resistance of the reflective film, and the addition of PA, PBMA or PU particles, the reflective film has better scratch resistance, while PMMA particles are relatively harder and scratch the light guide plate relatively more easily; the reflective film has better compression resistance by adding PA, PBMA or PMMA particles, and the PU particles have larger deformation degree after being stressed and weaken the compression resistance.
Examples 1 and 8 and 9 examine the influence of the ratio of the nano materials with different dimensions and the three-dimensional polymer particles on the performance of the coated reflective film, and find that the proper ratio of the nano materials with different dimensions and the three-dimensional polymer particles needs to be controlled, and the scratch and compression resistance effect is poor due to too few polymer particles; too little nanocellulose can lead to poor tensile strength and heat shrinkage properties.
Examples 1 and 10 and 11 examine the influence of different three-dimensional polymer particle sizes on the performance of a coated reflective film, examples 1 and 12 and 13 examine the influence of the size of one-dimensional nanomaterials on the performance of a coated reflective film, and it is found that the one-dimensional nanomaterials and three-dimensional polymer particles need to be controlled to be proper sizes, the sizes of the one-dimensional nanomaterials are too large, the improvement on the condition that the polymer particles are easy to agglomerate is not obvious, and the tensile strength change of the reflective film is not obvious due to too small sizes; the too large particle size of the three-dimensional polymer particles can cause severe coagulation of the coating liquid, and the too small particle size can cause poor compression resistance of the reflective film.
Example 1 in comparison with comparative examples 1 and 2, it was found that the present invention provides a coated reflective film based on a polymorphic particle coating and a method for preparing the same, which combine the advantages of one-dimensional nanomaterial and three-dimensional polymer particles, impart excellent scratch resistance, high compression resistance, heat resistance and tensile strength to the reflective film, and alleviate aggregation and sedimentation phenomena of coating liquid.
Claims (10)
1. A coated reflective film based on a multi-morphology particle coating comprising a reflective substrate, a multi-morphology particle coating disposed on the reflective substrate;
the reflecting substrate is a white parylene glycol film;
the multi-morphology particle coating is prepared by coating multi-morphology particle coating liquid containing one-dimensional nano materials, three-dimensional polymer particles, a leveling agent, an antistatic agent, an adhesive and a curing agent;
the multi-morphology particle coating liquid comprises the following components in percentage by mass: 1.37 to 12.6 weight percent of one-dimensional nano material, 1.37 to 12.6 weight percent of three-dimensional polymer particles, 0.1 to 0.3 weight percent of flatting agent, 1.0 to 2.0 weight percent of antistatic agent, 40.0 to 41.0 weight percent of adhesive, 3.6 to 4.2 weight percent of curing agent and the balance of solvent.
2. The coated reflective film of claim 1, wherein said one-dimensional nanomaterial is selected from the group consisting of nanomaterials having diameters of 5-60 nm and lengths of 100-1000 nm, including one or more of nanocellulose, titania nanotubes, zinc oxide nanorods, and alumina nanowires.
3. The coated reflective film based on a multi-morphology particle coating according to claim 1, wherein the three-dimensional polymer particles are at least one selected from polymethyl methacrylate, polybutyl methacrylate, polyamide or polyurethane, have an ellipsoidal or spherical structure, and have a particle size of 3 to 20 μm.
4. The coated reflective film based on a multi-morphology particle coating according to claim 1, wherein the leveling agent is one of an organosiloxane, an acrylate.
5. The coated multi-morphology particle coating-based reflective film according to claim 1, wherein the antistatic agent is one of polyethers or quaternary ammonium salts.
6. The multi-morphology particle coating-based coated reflective film of claim 1, wherein said adhesive comprises at least one of a selected acrylic adhesive, silicone adhesive, polyurethane adhesive; the curing agent comprises at least one of isocyanate, epoxy resin, methyl phenolic resin, amino resin and dicyandiamide.
7. The coated reflective film based on a multi-morphology particle coating according to claim 1, wherein the solvent comprises any one of ethanol and ethyl acetate, ethanol and butyl acetate, ethanol and butanone mixed solvents, and the ethanol ratio in the mixed solvents is equal to or less than 50%.
8. The coated reflection film based on a multi-morphology particle coating according to claim 6, wherein the adhesive and the curing agent are used in a ratio of 9:1 to 11:1 by mass.
9. A method for preparing a coated reflective film based on a polymorphous particle coating as claimed in any one of claims 1 to 8, comprising the steps of:
step one, preparation of a pre-dispersion solution: dispersing one-dimensional nano materials and three-dimensional polymer particles in an ethanol solvent, controlling the mass ratio of the one-dimensional nano materials to the three-dimensional polymer particles to be 1:1.5-1:3, then placing the mixture in a closed container, magnetically stirring the mixture at normal temperature at 50-200 rpm for 5-30 min, and uniformly stirring the mixture to obtain a pre-dispersed solution;
step two, preparing a multi-morphology particle coating liquid: dispersing the pre-dispersed solution obtained in the first step, an adhesive, a leveling agent, an antistatic agent and a curing agent into a solvent according to a formula in turn, and uniformly stirring to obtain a suspension, wherein the suspension is used as a final coating liquid;
step three, preparing a multi-morphology particle coating-based coated reflecting film: coating the coating liquid obtained in the second step on the surface of a substrate through an anilox bar, and performing heat curing through an oven to form a multi-morphology particle adhesive layer.
10. The method for preparing a coated reflective film based on a multi-morphology particle coating according to claim 9, wherein the heat curing temperature in the third step is controlled to be 100-125 ℃ and the reaction time is 1-3 min.
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