CN109683377B - High-haze adhesive layer composition and high-haze high-brightness composite brightness enhancement film - Google Patents
High-haze adhesive layer composition and high-haze high-brightness composite brightness enhancement film Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
- G02F1/133507—Films for enhancing the luminance
Abstract
The invention relates to the technical field of optics, in particular to a high-haze diffusion bonding layer composition for a multilayer optical film laminating layer and a high-haze high-brightness composite brightness enhancement film. In order to solve the problem of low luminance of the existing composite brightness enhancement film, the invention provides a high-haze diffusion bonding layer composition and a high-haze high-brightness composite brightness enhancement film. The formulation of the diffusion bond layer composition includes: 10-50% of UV resin, 1-20% of thermosetting resin, 40-80% of solvent and 0.5-10% of diffusion particles, wherein the percentage is weight percentage. The bonding layer composition provided by the invention solves the problem that the brightness is seriously reduced because the peak of the diffusion bonding layer coated with particles of the existing composite brightness enhancement film penetrates into the adhesive layer too deeply. The high-haze high-brightness composite brightness enhancement film provided by the invention has high luminance gain, good covering property and interference resistance, and good comprehensive performance.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a high-haze diffusion bonding layer composition for a multilayer optical film laminating layer and a high-haze high-brightness composite brightness enhancement film.
Background
Liquid Crystal display (lcd) is currently the most common display technology. The backlight module is an important component of the liquid crystal display, and mainly functions to provide a high-brightness and uniform surface light source for a liquid crystal display panel of the liquid crystal display. In order to ensure the image quality of the liquid crystal module, a plurality of optical films, such as prism films, diffusion films, microlens films, etc., must be used in the backlight module. The general formula is as follows: the structure comprises a lower diffusion film, a brightening film, an upper diffusion film, a lower diffusion film, a brightening film, a micro-lens film, a lower diffusion film, a brightening film, DBEF and the like.
With the requirements of ultra-clear, thin design and higher assembly yield of the liquid crystal module, new requirements are provided for the design of the optical diaphragm. Thus, film manufacturers have increasingly tended to laminate optical films to produce multilayer composite films from the production of a single optical film sheet. The multilayer composite optical film mainly functions to integrate at least two combined optical functions into one optical film, instead of two or more single-function thin optical films, for example, chinese patent applications having application numbers 201510315449.1 (published: 2015, 09 and 02), 201611113489.9 (published: 2018, 03 and 23), and 201611096522.1 (published: 2018, 03 and 23). The existing composite brightness enhancement film bonds the diffusion layer and the brightness enhancement layer together through the diffusion bonding layer, and has one or more of the following defects: 1. the laminating mode of the multilayer optical layers is adopted, so that the laminating between the films is simple, the preparation level is more, and the process is complex; 2. in order to realize high haze, a diffusion bonding layer with particles is generally adopted for coating, the thickness of the coating is usually controlled to be 3-7um, and if the coating is directly attached, the inevitable peak of a prism penetrates into the adhesive layer too deeply, so that the luminance of the composite brightness enhancement film is seriously reduced; 3. when the multilayer brightening layer is used in a fitting way, the diffusion performance is poor, and the phenomenon of poor light uniformity or interference is easy to generate.
Disclosure of Invention
In order to solve the problem of low luminance of the existing composite brightness enhancement film, the invention provides a high-haze diffusion bonding layer composition and a high-haze high-brightness composite brightness enhancement film. The diffusion bonding layer formed by the diffusion bonding layer composition can control the top end of the prism structure to be embedded into the diffusion bonding layer to a proper depth, and simultaneously, the diffusion bonding layer can be used as a diffusion bonding layer to provide a certain haze, so that the covering property and the interference resistance of the composite brightness enhancement film are improved, and an upper diffusion film is not required. The bonding layer composition provided by the invention solves the problem that the brightness is seriously reduced due to the fact that the peak of a diffusion bonding layer coated with particles of the existing high-haze composite brightness enhancement film penetrates into an adhesive layer to too deep depth. The high-haze high-brightness composite brightness enhancement film provided by the invention has high luminance gain, good covering property and interference resistance, and good comprehensive performance.
In order to solve the above technical problems, the present invention adopts the following technical solutions.
The present invention provides a high haze diffusion bonding layer composition comprising: UV resins, thermal curing resins, and diffusing particles.
Further, the formulation of the diffusion bond layer composition includes: UV resin, thermal curing resin, solvent, and diffusing particles.
Further, the formulation of the diffusion bond layer composition includes: 10-50% of UV resin, 1-20% of thermosetting resin, 40-80% of solvent and 0.5-10% of diffusion particles, wherein the percentage is weight percentage.
Further, the formulation of the diffusion bond layer composition includes: 20-42% of UV resin, 2-15% of thermosetting resin, 50-70% of solvent and 1-6% of diffusion particles, wherein the percentage is weight percentage. The foregoing technical solutions include examples 1 to 3, and examples 11 to 16.
Further, the formulation of the diffusion bond layer composition includes: 25-35% of UV resin, 3-8% of thermosetting resin, 55-65% of solvent and 1.5-4% of diffusion particles, wherein the percentage is weight percentage. The foregoing technical solutions include examples 2 to 3, and examples 14 to 16.
Further, the UV resin in the diffusion bonding layer composition comprises the following components: 20-70 parts of prepolymer, 5-44.8 parts of active monomer and 0.5-6 parts of photoinitiator. The UV resin in the diffusion bonding layer composition also includes a diluent.
Further, the UV resin in the diffusion bonding layer composition comprises the following components: 30-60 parts of prepolymer, 10-40 parts of active monomer and 1-4 parts of photoinitiator.
Further, the UV resin in the diffusion bonding layer composition comprises the following components: 35-55 parts of prepolymer, 20-30 parts of active monomer and 2-3 parts of photoinitiator.
Further, the reactive monomer is one reactive monomer or a combination of two reactive monomers.
Further, the initiator is one initiator or a combination of two initiators.
Further, the thermosetting resin comprises the following components: 70-95 parts of main agent and 4-20 parts of curing agent.
Further, the thermosetting resin comprises the following components: 80-92 parts of main agent and 6-18 parts of curing agent.
Further, the thermosetting resin comprises the following components: 85-90 parts of main agent and 8-13 parts of curing agent.
The high haze diffusion bonding layer composition is used for bonding of each layer structure of the composite brightness enhancement film.
Further, the UV resin is selected from one or a combination of at least two of polyurethane acrylic resin, epoxy acrylic resin or polyester acrylic resin; the solvent is selected from one or the combination of at least two of water, ester solvents or ketone solvents; the thermosetting resin is polyurethane resin; the diffusion particles are selected from organic particles. The organic particles are selected from one or the combination of at least two of polymethyl methacrylate, polybutyl methacrylate, polyurethane or nylon.
Further, the prepolymer is one or a combination of at least two of epoxy acrylate, polyester acrylate, polyether acrylate oligomer, acrylated polyacrylate, polyacrylate and polyurethane acrylate.
Further, the reactive monomer is selected from one or a combination of at least two of trimethylolpropane tri (meth) acrylate (TMPTA), tripropylene glycol diacrylate (TPGDA), hydroxyethyl acrylate, acrylic acid, butyl acrylate, isobornyl acrylate, 1, 4-butanediol diacrylate, 1, 6-hexanediol di (meth) acrylate, ethoxylated trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate (DPHA), urethane monoacrylate, or urethane diacrylate.
Further, the photoinitiator (simply referred to as initiator) is selected from one or a combination of at least two of 1-hydroxycyclohexyl phenyl ketone (184), 2-hydroxy-methyl phenyl propane-1-one (1173), 2,4,6 (trimethyl benzoyl diphenyl phosphine oxide) (TPO), or tolidine (BP).
Further, the main agent is selected from one or a combination of at least two of polyester polyol, polyether polyol or acrylic polyol.
Further, the curing agent is selected from isocyanate.
Further, the solvent is selected from one or a combination of at least two of ethyl acetate, methyl ethyl ketone, butyl acetate, acetone, toluene, xylene, butanone, cyclohexanone, methanol, ethanol, cyclohexane, N-hexane, N-heptane, chloroform, carbon tetrachloride, tetrahydrofuran, or N, N-dimethylacetamide.
Further, the diffusion particles are selected from one or a combination of at least two of polymethyl methacrylate (PMMA) particles, polybutyl methacrylate particles, polystyrene particles, silicone resin particles, polyurethane particles, or nylon particles, titanium dioxide particles, calcium carbonate particles, or barium sulfate particles.
The invention also provides a high-haze high-brightness composite brightness enhancement film which sequentially comprises a first prism layer, a first base material layer, a diffusion bonding layer, a second prism layer, a second base material layer and a back coating layer. The diffusion bonding layer is formed by curing the diffusion bonding layer composition provided by the invention.
The prism layer is composed of a plurality of micro-prism structures. The first prism layer is arranged on the upper surface (light-out surface) of the first base material layer, and the diffusion bonding layer is connected with the peak tip of the micro-prism structure of the second prism layer and the lower surface (light-in surface) of the first base material layer. The prism direction of the first prism layer and the prism direction of the second prism layer form a certain angle. The first base material and the second base material can be the same in material and thickness or different in thickness.
Further, the thickness of the first prism layer (also called as a first micro-prism layer) is 10-70 μm, the thickness of the first substrate layer is 50-300 μm, the thickness of the diffusion bonding layer is 1-10 μm, the thickness of the second prism layer (also called as a second micro-prism layer) is 5-60 μm, and the haze of the back coating layer is 1-25%.
Further, the thickness of the first prism layer is 20-50 μm, the thickness of the first base material layer is 75-250 μm, the thickness of the diffusion bonding layer is 1.5-8 μm, the thickness of the second prism layer is 10-40 μm, and the haze of the back coating layer is 2-15%.
Further, the thickness of the first prism layer is 25-40 μm, the thickness of the first substrate layer is 100-188 μm, the thickness of the diffusion bonding layer is 3-7 μm, the thickness of the second prism layer is 12-30 μm, and the haze of the back coating layer is 3-8%.
Further, an angle of 90 degrees is formed between the prism direction of the first prism layer and the prism direction of the second prism layer. The first prism layer is composed of a plurality of first prism columns, the cross sections of two ends of each first prism column are isosceles right-angled triangles, the vertex angle is a right angle, and the height of the micro-prism structure of the first prism layer is 10-40 mu m.
Furthermore, the cross sections of the two ends of the second prism layer are isosceles right triangles, the vertex angle is a right angle, the second prism layer comprises a plurality of microprism structures which are arranged in parallel and have different heights, and the height of the microprism structure of the second prism layer is 10-40 μm.
Furthermore, the cross section of the micro-prism structure of the first prism layer is an isosceles right triangle, and the vertex angle is a right angle.
Furthermore, the cross section of the micro-prism structure of the first prism layer is an isosceles right triangle, and the vertex angle is a right angle.
Further, the material of the first prism layer and the second prism layer is UV resin. More preferably, the UV resin is selected from UV acrylic resins. Further preferably, the UV resin is selected from one or a combination of at least two of polyurethane acrylic resin, polyether acrylate, epoxy acrylic resin, or polyester acrylic resin.
Furthermore, the materials of the first substrate layer and the second substrate layer are respectively selected from polycarbonate, polyethylene terephthalate, polymethyl methacrylate or polyvinyl chloride.
Further, the material of the diffusion bonding layer is selected from UV thermosetting mixed resin.
Furthermore, the material of the first prism layer and the second prism layer is polyethylene terephthalate, and the thickness of the base material is 50-188 μm.
The diffusion bonding layer contains more diffusion particles, forms the diffusion bonding layer, has the function of a diffusion film, can scatter light emitted by the second layer of microprisms, and effectively avoids rainbow lines and interference phenomena generated by overlapping of the upper prism layer and the lower prism layer.
The invention also provides a preparation method of the high-haze high-brightness composite brightness enhancement film, which comprises the following steps:
(1) coating a back coating layer on the light incident surface of the second substrate layer, and preparing a micro prism with a specific structure on the light emergent surface of the second substrate layer to form a second prism layer;
(2) after coating adhesive layer glue solution mixed with diffusion particles on the light incident surface of the first base material layer, performing thermosetting pre-curing and shaping, attaching the adhesive layer glue solution to the second prism layer obtained in the step (1), and then performing UV high-pressure curing under an ultraviolet curing lamp;
(3) and (3) preparing a micro prism with a specific structure on the light-emitting surface of the first base material layer of the composite film obtained in the step (2) to form a first prism layer.
Compared with the existing composite brightness enhancement film, the bonding layer formed by the high-haze diffusion bonding layer composition can control the top end of the prism structure to be embedded into the bonding layer at a proper depth, and meanwhile, the high-haze diffusion bonding layer composition can be used as a diffusion bonding layer to provide a certain haze, so that the covering property and the interference resistance of the composite brightness enhancement film are improved, and an upper diffusion film is not needed. The adhesive layer composition provided by the invention solves the problem that the brightness is seriously reduced due to the fact that the peak of the adhesive layer coated with particles of the high-haze composite brightness enhancement film penetrates into the adhesive layer to too deep depth. The high-haze high-brightness composite brightness enhancement film provided by the invention has high brightness and high haze, and is good in covering property, simple in preparation method process and easy to operate.
Specifically, the beneficial effects of the invention are as follows:
(1) according to the composite brightness enhancement film, on one hand, 2 times of curing is realized through UV and thermosetting high-haze diffusion bonding layers, the depth of the peak of the diffusion bonding layer coated prism of the high-haze composite brightness enhancement film with particles, which penetrates into the glue layer, is controlled to be not large by using the formula of the diffusion bonding layer composition and the 2 times of curing process, and the luminance of the composite brightness enhancement film is greatly improved.
(2) The composite brightness enhancement film and the high-haze diffusion bonding layer provide certain haze, can effectively avoid interference phenomenon, and reduce the use of an upper diffusion film.
(3) The preparation method of the composite brightness enhancement film is simple and has good repeatability.
Drawings
FIG. 1 is a schematic cross-sectional view of a high haze and high brightness composite brightness enhancement film according to the present invention;
Detailed Description
The following examples are further illustrative of the present invention and are not intended to be limiting thereof. The detailed description is as follows:
as shown in fig. 1, the composite brightness enhancement film with high haze and high brightness provided by the invention sequentially comprises a first prism layer 10, a first substrate layer 11, a diffusion bonding layer 12, a second prism layer 13, a second substrate layer 14 and a back coating layer 15, wherein the prism layers (the first prism layer 10 and the second prism layer 13) are composed of a plurality of micro-prism structures, the first prism layer is arranged on the upper surface (light-emitting surface) of the first substrate layer, and the diffusion bonding layer is connected with the peak tips of the micro-prism structures of the second prism layer and the first substrate layer. The prism (prism column or prism strip) direction of the first prism layer and the prism (prism column or prism strip) direction of the second prism layer form a certain angle. The first base material and the second base material can be the same in material and thickness or different in thickness. The cross sections of the two ends of the first prism column are isosceles right triangles, the vertex angle is a right angle, the height H of the micro-prism structure of the first prism layer 10 is 10-40 μm, and the peak-to-peak distance P between two adjacent micro-prism strips of the first prism layer 10 is 20-80 μm.
Furthermore, the cross sections of the two ends of the second prism layer are isosceles right triangles, the vertex angle is a right angle, the second prism layer comprises a plurality of microprism structures which are arranged in parallel and have different heights, the height H of the microprism structure of the second prism layer is 10-40 μm, and the peak-to-peak distance P between two adjacent microprism strips of the second prism layer is 20-80 μm.
The diffusion bonding layer composition includes: UV resin, thermal curing resin, and diffusion particles 111.
The main properties of the composite brightness enhancement films provided by the examples of the present invention and the comparative examples were tested in the following manner.
1. Haze test: the haze of each substrate after being coated with the back coating was tested with reference to the standard of GB/T25273-2010 integral sphere method for measuring haze of thin film for Liquid Crystal Display (LCD).
2. And (3) testing the peeling force: the peel force between the first substrate layer and the second prism layer of the composite brightness enhancement film using different diffusion bonding layer formulations was tested according to the standard of GB/T25256-.
3. Testing the brightness gain: brightness and light uniformity were measured using a BM-7 Brightness colorimeter from Topcon, Japan, and brightness was measured at 4 points at 4 angles of 15cm × 15cm in the center of the surface, and the average value of the 4 points was taken as a luminance value. Testing a contrast-structured film to have a luminance of L0The brightness of this embodiment is tested to be L1Then the luminance gain of the composite brightness enhancement film is L1/L0。
4. Covering property: and assembling the cut diaphragm into a direct type backlight module, and observing the covering degree and the diffusion effect of the lamp beads on the display screen at a vertical angle after the backlight module is lightened. Evaluation grade: good > better > bad.
5. The anti-interference performance is as follows: after the cut film is assembled into the direct type backlight module and the backlight module is lighted up, the display screen is observed to see whether Newton's rings and Moire effect exist or not and whether the phenomenon is serious or not. Evaluation grade: none > slight > clearly > severe.
6. Fitting depth: tearing the upper and lower layers of the composite brightness enhancement film, the wave crest of the prism can form a sunken attaching mark on the attaching layer. The depth of the recess can be measured using a laser microscope, which is the depth of the fit.
Comparative example 1 provides a composite brightness enhancement film comprising, in order, a first prism layer, a first substrate layer, a diffusion bonding layer, a second prism layer, a second substrate layer, and a back coating. The formulation of the diffusion bonding layer includes a UV resin, a solvent and diffusion particles. The UV resin formula comprises prepolymer, active monomer and photoinitiator. The first prism layer, the first substrate layer, the second prism layer, the second substrate layer and the back coating layer are as shown in example 1.
Except for the formulation of the diffusion bond coat, which does not include a thermosetting resin.
The technical parameters of the formulation of the diffusion bonding layer in the composite brightness enhancing film provided in comparative example 1 are shown in table 1 below.
Table 1 technical parameters of the formulation of the diffusion bond coat in the composite brightness enhancing film provided in comparative example 1
Embodiments 1 to 16 provide a composite brightness enhancement film according to the present invention, which sequentially includes a first prism layer 10, a first substrate layer 11, a diffusion bonding layer 12, a second prism layer 13, a second substrate layer 14, and a back coating layer 15, wherein the prism layers (the first prism layer 10 and the second prism layer 13) are composed of a plurality of micro-prism structures, the first prism layer is disposed on an upper surface (light exit surface) of the first substrate layer, and the diffusion bonding layer connects peak tips of the micro-prism structures of the second prism layer with the first substrate layer. An angle of 90 degrees is formed between the prism direction of the first prism layer and the prism direction of the second prism layer. The first base material and the second base material are the same in material and thickness.
The diffusion bonding layer is formed by curing the diffusion bonding layer composition.
The formulation of the diffusion bond layer composition includes: 10-50% of UV resin, 1-20% of thermosetting resin, 40-80% of solvent and 0.5-10% of diffusion particles, wherein the percentage is weight percentage.
The UV resin in the diffusion bonding layer composition comprises the following components: 20-70 parts of prepolymer, 5-44.8 parts of active monomer and 0.5-6 parts of photoinitiator. The UV resin in the diffusion bonding layer composition also includes a diluent. The thermosetting resin comprises the following components: 70-95 parts of main agent and 4-20 parts of curing agent.
The technical parameters of the composite brightness enhancement films provided in examples 1-16 are shown in tables 2-7 below. The results of testing the primary properties of the composite brightness enhancing films provided in examples 1-16 and the brightness enhancing film provided in comparative example 1 are shown in table 8.
Table 2 formulation and addition of UV resin to the diffusion bond coat composition of composite brightness enhancing films provided in examples 1-16
TABLE 3 weight proportions of reactive monomers and of initiators shown in Table 1
Table 4 formulation and amount of thermosetting resin for diffusion bond coat composition for composite brightness enhancing films provided in examples 1-16
TABLE 5 materials and amounts of solvent and diffusion particles for diffusion bonding layer compositions for composite brightness enhancing films provided in examples 1-16
Note: the amount of solvent added in table 5 is the total amount added for each solvent combination. The amount of the diffusion particles added is the total amount of addition of the combination of the respective diffusion particles.
Table 6 technical parameters of the first microprism layer, the first substrate layer and the diffusion bonding layer of the composite brightness enhancing film provided in examples 1-16
Table 7 technical parameters for the second micro-prism layer, second substrate layer and back-coat layer of the composite brightness enhancing films provided in examples 1-16
Note: in table 7, the thickness of the second base material layer was the same as that of the first base material layer.
Table 8 results of testing the main properties of the composite brightness enhancement films provided in examples 1-16 and the brightness enhancement film provided in comparative example 1
The test results of the above examples and comparative examples show that the high-haze high-brightness composite brightness enhancement film provided by the invention has high luminance gain, good covering property, folding resistance and interference resistance, and good comprehensive performance. Of these, examples 1 to 3, and examples 11 to 16 had better high luminance gain (1.99 or more), good hiding property, folding resistance and anti-interference property. Furthermore, examples 2 to 3, and examples 14 to 16 had better high luminance gain (2.0 or more), good hiding property, folding resistance and anti-interference property.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the disclosure of the present invention are covered by the scope of the claims of the present invention.
Claims (8)
1. A high haze diffusion bond layer composition, wherein the diffusion bond layer composition is formulated to comprise: 25-35% of UV resin, 3-8% of thermosetting resin, 55-65% of solvent and 1.5-4% of diffusion particles, wherein the percentage is weight percentage;
the UV resin in the diffusion bonding layer composition comprises the following components: 35-55 parts of prepolymer, 20-30 parts of active monomer and 2-3 parts of photoinitiator;
the thermosetting resin comprises the following components: 85-90 parts of main agent and 8-13 parts of curing agent.
2. The high haze diffusive adhesive layer composition as claimed in claim 1 wherein the UV resin is selected from one or a combination of at least two of polyurethane acrylic, epoxy acrylic, or polyester acrylic; the solvent is selected from one or the combination of at least two of water, ester solvents or ketone solvents; the thermosetting resin is polyurethane resin; the diffusion particles are selected from organic particles.
3. The high haze diffusion bond coat composition of claim 1 wherein the pre-polymer is selected from one or a combination of at least two of epoxy acrylate, polyester acrylate, polyether acrylate oligomer, acrylated polyacrylate, or urethane acrylate.
4. The high haze diffusion adhesive layer composition of claim 1, wherein the reactive monomer is selected from one or a combination of at least two of trimethylolpropane tri (meth) acrylate (TMPTA), tripropylene glycol diacrylate (TPGDA), hydroxyethyl acrylate, acrylic acid, butyl acrylate, isobornyl acrylate, 1, 4-butanediol diacrylate, 1, 6-hexanediol di (meth) acrylate, ethoxylated trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate (DPHA), urethane monoacrylate, or urethane diacrylate.
5. The high haze diffusion adhesive layer composition of claim 1, wherein the main agent is selected from one or a combination of at least two of polyester polyols, polyether polyols, or acrylic polyols, and the curing agent is an isocyanate.
6. The high-haze high-brightness composite brightness enhancement film is characterized by sequentially comprising a first prism layer, a first substrate layer, a diffusion bonding layer, a second prism layer, a second substrate layer and a back coating layer; the diffusion bond layer is formed from the diffusion bond layer composition provided in any one of claims 1-5 after curing.
7. The high haze high brightness composite brightness enhancing film according to claim 6, wherein the thickness of the first prism layer is 10-70 μm, the thickness of the first substrate layer is 50-300 μm, the thickness of the diffusion bonding layer is 1-10 μm, the thickness of the second prism layer is 5-60 μm, and the haze of the back coating layer is 1-25%.
8. The high haze high brightness composite brightness enhancing film according to claim 7, wherein the thickness of the first prism layer is 20-50 μm, the thickness of the first substrate layer is 75-250 μm, the thickness of the diffusion bonding layer is 1.5-8 μm, the thickness of the second prism layer is 10-40 μm, and the haze of the back coating layer is 2-15%.
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| CN201811597765.2A CN109683377B (en) | 2018-12-26 | 2018-12-26 | High-haze adhesive layer composition and high-haze high-brightness composite brightness enhancement film |
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| CN201811597765.2A CN109683377B (en) | 2018-12-26 | 2018-12-26 | High-haze adhesive layer composition and high-haze high-brightness composite brightness enhancement film |
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| CN109683377A CN109683377A (en) | 2019-04-26 |
| CN109683377B true CN109683377B (en) | 2021-10-26 |
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| CN211857087U (en) * | 2020-02-24 | 2020-11-03 | 宁波激智科技股份有限公司 | Interference reducing collimation film |
| CN114114506A (en) * | 2020-08-31 | 2022-03-01 | 宁波激智科技股份有限公司 | Polarization-maintaining optical film and full-lamination polarization-maintaining composite prism film |
| CN112285814B (en) * | 2020-11-08 | 2023-01-17 | 合肥乐凯科技产业有限公司 | High-brightness high-covering composite optical film |
| CN112159630B (en) * | 2020-11-12 | 2022-08-26 | 合肥乐凯科技产业有限公司 | Optical film, preparation method thereof and composite brightness enhancement film |
| CN112433280B (en) * | 2020-11-18 | 2023-02-28 | 合肥乐凯科技产业有限公司 | Optical composite film and preparation method thereof |
| CN113189687A (en) * | 2021-05-18 | 2021-07-30 | 合肥翰博星辰高新材料有限公司 | Diffusion film, backlight module and display device |
| CN114311921A (en) * | 2021-12-30 | 2022-04-12 | 深圳市金光宝光电有限公司 | Eye-protecting full-vision cornea |
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