CN113956780A - 3D film grating layer coating and preparation method and application thereof - Google Patents
3D film grating layer coating and preparation method and application thereof Download PDFInfo
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
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- 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
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention discloses a 3D film grating layer coating and a preparation method and application thereof. The 3D film grating layer coating comprises the following components: high refractive index UV resin, high refractive index UV monomer, photoinitiator and demolding auxiliary agent; the high-refractive-index UV resin is urethane acrylate containing bisphenol fluorene groups and/or nano zirconia hybridized urethane acrylate; the high-refractive-index UV monomer is a bisphenol fluorenyl acrylic monomer and/or a nano zirconia hybrid acrylic monomer. The invention also discloses a bending-resistant naked eye 3D film prepared by using the coating as a grating layer raw material. According to the invention, the bisphenol fluorenyl-containing urethane acrylate and/or nano-zirconia hybrid urethane acrylate, the bisphenol fluorenyl acrylic monomer and/or nano-zirconia hybrid acrylic monomer and other components are selected as the raw materials of the grating layer, so that the bending resistance of the naked eye 3D film is further improved on the basis of obtaining a good 3D display effect.
Description
Technical Field
The invention relates to the technical field of naked eye 3D technology, in particular to 3D film grating layer coating and a preparation method and application thereof.
Background
The naked-eye 3D display technology refers to a stereoscopic display technology that can obtain a stereoscopic effect without any auxiliary device for viewing. In a conventional naked-eye 3D display technology, a lenticular lens grating is formed by a lenticular lens array assembly to achieve a stereoscopic display effect. The cylindrical lens array component is formed by continuously arranging a plurality of long and thin straight strip-shaped convex lenses along an axial direction, respectively projecting two patterns with parallax information processed in a specific mode to left and right eyes of a person by utilizing the light splitting effect of the cylindrical lenses to respectively form images on the retinas of the left and right eyes, and then processing the images by a brain system to obtain the parallax information so as to form stereoscopic vision.
In the prior art, a lenticular lens grating layer of a naked-eye 3D film is mainly formed and cured on a transparent substrate by a layer of high-refractive-index UV resin having a cylindrical structure, i.e., a lenticular lens array assembly, to form the lenticular lens grating layer, or a lenticular lens structure is directly manufactured on the same material by using an extrusion molding technology.
The bending resistance of the 3D film is generally mainly influenced by the grating layer, and the naked eye 3D film in the prior art is generally high in hardness and large in brittleness, and is extremely easy to break and not resistant to bending in the bending use process. Chinese patent application CN 104087187a discloses an optical protection film with 3D visual effect, which comprises a PET substrate layer, wherein the surface of the PET substrate layer is provided with a hardened layer (equivalent to a grating layer) with a cross section of a corrugated structure, and the hardened layer of the corrugated structure forms an optical structure of a lenticular lens on the PET substrate layer. The raw material used by the hardened layer is polyfunctional acrylic polyurethane resin, although the refractive index of the resin is high, the hardness is high, and the hardened layer can reach pencil hardness of more than 3H after ultraviolet curing. Due to the high hardness and the high brittleness of the hardened layer, the 3D film has poor flexibility and is not resistant to bending.
In recent years, the demand for flexible display is increasing, and the naked-eye 3D film has to have good bending resistance when applied to the flexible display. Therefore, it is necessary to develop a 3D film grating layer coating so that the naked-eye 3D film has better bending resistance.
Disclosure of Invention
The invention provides a 3D film grating layer coating for overcoming the defects of high refractive index and bending resistance which cannot meet the naked eye 3D requirement in the prior art, wherein the coating comprises specific components such as high refractive index UV resin, high refractive index UV monomer and photoinitiator, and the like, has good flexibility after curing while meeting the high refractive index required by the naked eye 3D, and is beneficial to improving the bending resistance of the grating layer.
The invention also provides a preparation method of the 3D film grating layer coating.
The invention also protects the bending-resistant naked eye 3D film, the grating layer of the naked eye 3D film is prepared from the 3D film grating layer coating, and the grating layer has low hard brittleness, so that the naked eye 3D film is not easy to break in the bending use process.
The invention further aims to provide a preparation method of the naked eye 3D film.
The invention further aims to provide application of the naked-eye 3D film in preparation of a flexible 3D display screen product.
In order to solve the technical problems, the invention adopts the technical scheme that:
A3D film grating layer coating comprises the following components in parts by weight:
30-60 parts of high-refractive-index UV resin, 30-50 parts of high-refractive-index UV monomer, 1-5 parts of photoinitiator and 0-1 part of demolding auxiliary agent;
the high-refractive-index UV resin is urethane acrylate containing bisphenol fluorene groups and/or nano zirconia hybridized urethane acrylate; the high-refractive-index UV monomer is a bisphenol fluorenyl acrylic monomer and/or a nano zirconia hybrid acrylic monomer.
The inventor researches and discovers that in order to obtain a good 3D display effect, the raw material of the grating layer needs to have high refractive index, and in order to obtain good bending resistance of the 3D film, the grating layer needs to have low hardness and brittleness and high flexibility.
The 3D film grating layer coating disclosed by the invention takes the polyurethane acrylate containing bisphenol fluorene groups and/or the nano zirconia hybrid polyurethane acrylate as a high-refractive-index UV resin matrix, and takes the bisphenol fluorene acrylic monomer and/or the nano zirconia hybrid acrylic monomer as a high-refractive-index UV monomer.
By modifying urethane acrylate, grafting bisphenol fluorene groups or performing nano zirconia hybridization, a UV resin matrix with high refractive index and high flexibility can be obtained. For the polyurethane acrylate hybridized by the nano zirconia, the nano zirconia can be uniformly distributed in the cross-linked network body of the polyurethane acrylic resin, and the network compactness of the system is further improved, so that the cross-linking density of the grating layer after UV curing is improved, the hardness and brittleness of the grating layer are reduced, and the molecular chain segment of the grating layer has a large extension space. When the naked eye 3D film is bent for use, the bending acting force acts on the grating layer, and the impacted part can be diffused and transmitted out along the polymer net structure through the movement of the molecular chain of the grating layer, so that the damage caused by overlarge local bending force is reduced.
Preferably, the refractive index of the urethane acrylate containing the bisphenol fluorene group is 1.60-1.63; the refractive index of the nano zirconia hybrid polyurethane acrylate is 1.61-1.62.
The bisphenol fluorenyl acrylic monomer and/or the nano zirconia hybrid acrylic monomer are/is used as the high-refractive-index UV monomer of the grating layer, the refractive index is high and can reach 1.6-1.7, and the synergistic effect can be provided for reducing the brittleness and the hardness of the grating layer.
The nano zirconia hybrid polyurethane acrylic resin is prepared by the following method:
the nano zirconia is subjected to surface modification by using isomeric diisocyanate to obtain functionalized nano zirconia containing-NCO groups, and the functionalized nano zirconia is subjected to modified polymerization grafting to obtain the nano zirconia hybrid polyurethane acrylic resin.
The nano zirconia hybrid acrylic monomer is prepared by the following method:
the nano zirconia is subjected to surface modification by using isomeric diisocyanate to obtain functionalized nano zirconia containing-NCO groups, and then the functionalized nano zirconia is reacted with propyl acrylate for grafting to obtain the nano zirconia hybrid acrylic monomer.
Preferably, the photoinitiator is one or more of 1-hydroxy-cyclohexyl-phenyl ketone (184), 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide (TPO) or phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide.
More preferably, the photoinitiator is a mixture of 1-hydroxy-cyclohexyl-phenyl-methanone and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide.
The photoinitiator 184 and TPO are mixed for use, so that the photocuring effect is better, and the long-wave deep curing effect of the grating layer is better.
The addition of the demolding auxiliary agent is beneficial to improving the demolding performance of the 3D film grating layer coating. In the preparation process, the 3D film grating layer coating has better demolding performance, so that the prepared grating layer cylindrical lens array structure has better texture and is beneficial to better 3D display effect.
Preferably, the demolding auxiliary agent is a wetting and leveling agent.
Specifically, the wetting and leveling agent is one or more of Germany Bick BYK333, BYK378 or Germany Digatego flow 410.
The invention also provides a preparation method of the 3D film grating layer coating, which comprises the following steps:
mixing bisphenol fluorenyl-containing urethane acrylate and/or nano zirconia hybrid urethane acrylate, bisphenol fluorenyl acrylic monomer and/or nano zirconia hybrid acrylic monomer, photoinitiator and demolding auxiliary agent, and stirring to obtain the grating layer coating.
The invention also discloses a bending-resistant naked-eye 3D film which comprises a substrate layer, a grating layer arranged on the substrate layer and a filling layer arranged on the grating layer, wherein the grating layer is provided with a cylindrical lens array, and the grating layer is prepared from the 3D film grating layer coating.
The grating layer is a functional layer which is well known to those skilled in the art and is applied to a 3D display film, and the grating layer has a lenticular lens array in which a plurality of lenticular lenses are arranged in parallel to form an array. Preferably, the lenticular lens may be a cylindrical lens, a triangular lenticular lens, or a trapezoidal pillar lens.
The grating layer prepared from the 3D film grating layer coating has high refractive index to meet the requirement of 3D display, and has low hardness and excellent bending resistance, so that the naked eye 3D film has good bending resistance.
The refractive index (n1) of the grating layer is 1.6-1.7.
Preferably, the substrate layer is a film made of a transparent resin as a substrate.
Optionally, the substrate layer may be one or more of a PET film, a PC film, a TPU film, or a PVC film.
Preferably, the substrate layer is a PET film.
The PET film has better flexibility and better bending resistance.
Preferably, the thickness of the base material layer is 75-250 μm.
Preferably, the filling layer is prepared from the following components in parts by weight:
20-50 parts of low-refractive-index UV resin, 40-60 parts of low-refractive-index UV monomer and 1-5 parts of photoinitiator; the refractive index of the low-refractive-index UV resin is 1.35-1.45; the refractive index of the low-refractive-index UV monomer is 1.3-1.41.
Preferably, the low refractive index UV resin is one or more of polyurethane acrylic resin, polyester acrylic resin or fluorine modified acrylic resin.
Preferably, the low refractive index UV monomer is a fluorine modified acrylic monomer.
More preferably, the low refractive index UV monomer may be a perfluoro modified acrylic monomer.
The perfluoro modified acrylic monomer has extremely low refractive index, and is beneficial to obtaining better 3D display effect.
Preferably, the refractive index (n2) of the base material layer is 1.38-1.45.
Preferably, n1 and n2 satisfy n1-n2 ═ 0.2-0.3.
More preferably, n1 and n2 satisfy n1-n2 ═ 0.23-0.25.
Within the refractive index range, the 3D display effect of the naked eye 3D film is better.
The invention also provides a preparation method of the bending-resistant naked eye 3D film, and the preparation method can adopt a roll-to-roll process.
The preparation method comprises the following steps:
s1, coating the 3D film grating layer coating on the surface of a substrate layer, then embossing by using a texture roller with a structure complementary with a cylindrical lens array structure, and performing ultraviolet curing to obtain a grating layer with a cylindrical lens array;
s2, mixing the low-refractive-index UV resin, the low-refractive-index UV monomer and the photoinitiator, and stirring to obtain a filling layer coating; and coating a filling layer coating on the surface of the grating layer, then embossing by using a smooth roller, and carrying out ultraviolet curing to obtain the bending-resistant naked eye 3D film.
Preferably, the coating thickness of the grating layer coating in the step S2 is 60-100 μm.
Preferably, the coating thickness of the filling layer coating in the step S3 is 50-90 μm.
Preferably, the power of the ultraviolet lamp for ultraviolet curing in steps S2 and S3 is 80-200W/cm2The energy is 400-1000 mj/cm2The curing time is 1-3 seconds, and the coating linear speed is 1-5 m/min.
The invention also protects the application of the bending-resistant naked eye 3D film in the preparation of a naked eye 3D film product of a flexible display screen.
Compared with the prior art, the invention has the beneficial effects that:
the invention develops a 3D film grating layer coating and a bending-resistant naked eye 3D film prepared by using the coating as a grating layer raw material. By selecting the bisphenol fluorenyl-containing urethane acrylate and/or nano zirconia hybrid urethane acrylate, the bisphenol fluorenyl acrylic monomer and/or the nano zirconia hybrid acrylic monomer and other components as the raw materials of the grating layer, the bending resistance of the naked eye 3D film is further improved on the basis of obtaining a good 3D display effect. Naked eye 3D film winding
After the shaft rod is bent for 180 degrees, the cracking can not occur, and the utility model has the advantages thatExcellent bending resistance effect, and can be applied to flexible display equipment.
Drawings
Fig. 1 is a schematic structural view of a naked-eye 3D film prepared in example 1.
In the figure: 1 is the substrate layer, 2 is the grating layer, and 3 is the filling layer.
Detailed Description
The present invention will be further described with reference to the following embodiments.
The starting materials in the examples and comparative examples are all commercially available, wherein:
bisphenol fluorenyl-containing urethane acrylate: korean american chemical HR6040 (refractive index of 1.62);
nano zirconia hybrid urethane acrylate: jiujiu chemical industry LM770 (refractive index 1.61), Korea chemton's CHTH-2760B (refractive index 1.617), Taiwan Changxing 6372 (refractive index 1.62);
bisphenol fluorenyl acrylic monomer: taiwan changxing EM2206 (refractive index 1.6);
nano zirconia hybrid acrylic monomer: chemical formulae D-513 (refractive index 1.67), D-113 (refractive index 1.65);
phenoxy ethyl acrylate: hua xiang kejie PHEA (refractive index 1.515);
fluorine-modified acrylic resin: the Shu-Right trades SFH-345LC (refractive index 1.345), SFH400LC (refractive index 1.4);
fluorine-modified acrylic acid monomer: hannong SFA-001 (refractive index 1.395), perfluoro methyl methacrylate;
urethane acrylate: adjuvant chemical SPU6610 (refractive index 1.45);
reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Examples 1 to 11
the preparation method of the 3D film grating layer coating comprises the following steps:
and mixing the bisphenol fluorenyl-containing urethane acrylate and/or nano zirconia hybrid urethane acrylate, the bisphenol fluorenyl acrylic monomer and/or the nano zirconia hybrid acrylic monomer, the photoinitiator and the demolding auxiliary agent according to the table 1, and stirring to obtain the 3D film grating layer coating.
The preparation method of the naked eye 3D film comprises the following steps:
s1, mixing the components of a filling layer according to the raw material content in the table 1 to obtain a filling layer coating;
s2, coating a 3D film grating layer coating with the thickness of 80 microns on the surface of a PET film base material layer with the thickness of 100 microns in a glue dripping or roll-to-roll glue mode, rolling by using texture rollers with parallel arranged inverted trapezoidal table structures, and performing ultraviolet curing in the rolling process to obtain a grating layer with a cylindrical lens array;
s3, coating a filling layer coating with the thickness of 70 microns on the surface of the grating layer in a glue dripping or roll-to-roll glue mode, rolling by using a texture-free smooth roll, and performing ultraviolet curing in the rolling process to obtain the naked eye 3D film.
Wherein the power of the ultraviolet curing ultraviolet lamp in the steps S2 and S3 is 80-200W/cm2The energy is 400-1000 mj/cm2The curing time is 1-3 seconds, and the coating linear speed is 1-5 m/min.
TABLE 1 raw material contents (parts by weight) of naked eye 3D films of examples 1 to 11
Comparative examples 1 to 4
Comparative examples 1 to 4 respectively provide a 3D film grating layer coating and a naked eye 3D film prepared by the same, the preparation method is the same as that of the embodiment, and the raw material content is as shown in Table 2:
TABLE 2 raw material contents (parts by weight) of comparative examples 1 to 4 naked eye 3D films
Performance testing
The naked eye 3D films prepared in the above examples and comparative examples are subjected to performance tests, and the specific method is as follows:
refractive index: detecting refractive indexes n1 and n2 of the grating layer and the filling layer by using an Abbe refractometer respectively;
adhesion force: according to the method of GB/T1720-89, a paint film adhesion tester is adopted, and a hundred-grid experiment is utilized to test the adhesion of the grating layer to the substrate layer;
demolding property of the grating layer: when the grating layer coating is rolled by using a texture roller, the demolding performance of the coating is observed, and the demolding is level I without residual glue and demolding sound; demoulding has no residual glue and slight demoulding sound, and is grade II; demolding to obtain III grade product with residual glue;
bending resistance: bending the naked eye 3D film for 180 degrees around a shaft rod with a specific diameter, unfolding, bending for 180 degrees around the same direct shaft rod again, and bending for three times; whether the bent part is broken or cracked is observed, and the diameters of the shaft rods are respectively as follows:
the evaluation grade of the bending resistance is as follows:
the bending has no crack, fracture or cracking, and is grade 1;
bending with cracks or fissures
No crack or crack is generated during bending, and the bending grade is 2;
with cracks or fissures in bends of the inner diameter mandrel
No crack or crack is generated during bending, and the grade is 3;
with cracks or fissures in bends of the inner diameter mandrel
No crack or crack is generated during bending, and the grade is 4;
with cracks or fissures in bends of the inner diameter mandrel
No crack or crack is generated during bending, and the grade is 5;
3D effect: visually, it was observed whether or not the 3D stereoscopic effect was exhibited.
The schematic structural diagram of the naked-eye 3D film prepared in embodiment 1 of the present invention is shown in fig. 1, where 1 is a substrate layer, i.e., a PET film, 2 is a grating layer having a lenticular lens array, and 3 is a filling layer.
The results of the performance tests of the examples and comparative examples are shown in Table 3.
TABLE 3 test results of examples and comparative examples
| Performance of | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Grating layer refractive index n1 | 1.6106 | 1.580 | 1.5709 | 1.6140 | |
| The refractive index of the filling layer n2 | 1.3768 | 1.3768 | 1.3768 | 1.3768 | |
| Adhesion force | 5B | 5B | 5B | 5B | |
| Releasability from mold | Stage II | Class III | Class I | Stage II | |
| Resistance to bending | 4 stage | 4 stage | 4 | Grade | 3 |
| 3D effects | NG | NG | NG | NG |
According to the test results, the naked eye 3D film provided by the embodiments of the invention has the advantages that the 3D display effect is good, the adhesive force is 5B, and the demolding performance is good. Naked eye 3D films of examples 1-11
The inner bend was free from cracks or cracks, indicating excellent bending resistance.
In comparative example 1, the grating layer did not contain bisphenol fluorenyl acrylic monomer or nano zirconia hybrid acrylic monomer; the high refractive index UV monomer used in comparative example 2 is phenoxyethyl acrylate, and the prepared naked eye 3D film cannot achieve good bending resistance and can not be wound
The naked eye 3D film has cracks or complete fracture after the shaft rod is bent for 180 degrees. Compared with the prior art, the high-refractive-index UV resin used in the grating layer in the comparative example 3 is polyurethane acrylate, but not the bisphenol fluorene group-containing polyurethane acrylate or nano-zirconia hybrid polyurethane acrylate, so that the prepared naked eye 3D film grating layer has high hardness and poor bending resistance, and the refractive index of the grating layer is only 1.5709, so that the refractive index difference is less than 0.2, and the naked eye 3D display effect is influenced. Comparative example 4, the content of the high refractive index UV resin is too low, so that the strength of the grating layer is low, the demolding performance is further influenced, and the naked eye 3D film is formedIs poor in both bending resistance and 3D effect.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The 3D film grating layer coating is characterized by comprising the following components in parts by weight:
30-60 parts of high-refractive-index UV resin, 30-50 parts of high-refractive-index UV monomer, 1-5 parts of photoinitiator and 0-1 part of demolding auxiliary agent;
the high-refractive-index UV resin is urethane acrylate containing bisphenol fluorene groups and/or nano zirconia hybridized urethane acrylate; the high-refractive-index UV monomer is a bisphenol fluorenyl acrylic monomer and/or a nano zirconia hybrid acrylic monomer.
2. A 3D film grating layer coating according to claim 1, wherein the photoinitiator is one or more of 1-hydroxy-cyclohexyl-phenyl ketone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, or phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide.
3. The 3D film grating layer coating of claim 1, wherein the release aid is a wetting and leveling agent.
4. The method for preparing a 3D film grating layer coating according to any one of claims 1 to 3, comprising the following steps:
mixing bisphenol fluorenyl-containing urethane acrylate and/or nano zirconia hybrid urethane acrylate, bisphenol fluorenyl acrylic monomer and/or nano zirconia hybrid acrylic monomer, photoinitiator and demolding auxiliary agent, and stirring to obtain the 3D film grating layer coating.
5. A bending-resistant naked-eye 3D film comprises a substrate layer, a grating layer arranged on the substrate layer and a filling layer arranged on the grating layer, wherein the grating layer is provided with a cylindrical lens array, and the bending-resistant naked-eye 3D film is characterized in that the grating layer is prepared from the 3D film grating layer coating according to any one of claims 1-3.
6. The naked-eye 3D film according to claim 5, wherein the filling layer is prepared from the following components in parts by weight:
20-50 parts of low-refractive-index UV resin, 40-60 parts of low-refractive-index UV monomer and 1-5 parts of photoinitiator; the refractive index of the low-refractive-index UV resin is 1.35-1.45; the refractive index of the low-refractive-index UV monomer is 1.3-1.41.
7. The naked eye 3D film according to claim 6, wherein the low refractive index UV resin is one or more of polyurethane acrylic resin, polyester acrylic resin or fluorine modified acrylic resin; the low refractive index UV monomer is a fluorine modified acrylic monomer.
8. The naked-eye 3D film according to claim 5, wherein the substrate layer is one or more of a PET film, a PC film, a TPU film or a PVC film.
9. The preparation method of the naked eye 3D film according to any one of claims 5 to 8, which is characterized by comprising the following steps:
s1, coating the 3D film grating layer coating on the surface of a substrate layer, then embossing by using a texture roller with a structure complementary with a cylindrical lens array structure, and performing ultraviolet curing to obtain a grating layer with a cylindrical lens array;
s2, mixing the low-refractive-index UV resin, the low-refractive-index UV monomer and the photoinitiator, and stirring to obtain a filling layer coating; and coating a filling layer coating on the surface of the grating layer, then embossing by using a smooth roller, and carrying out ultraviolet curing to obtain the bending-resistant naked eye 3D film.
10. Use of the naked-eye 3D film according to any one of claims 5 to 8 in the preparation of a flexible 3D display screen product.
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