CN109575764B - Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof - Google Patents

Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof Download PDF

Info

Publication number
CN109575764B
CN109575764B CN201811331210.3A CN201811331210A CN109575764B CN 109575764 B CN109575764 B CN 109575764B CN 201811331210 A CN201811331210 A CN 201811331210A CN 109575764 B CN109575764 B CN 109575764B
Authority
CN
China
Prior art keywords
diffusion
layer
composite film
acrylic resin
coating composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811331210.3A
Other languages
Chinese (zh)
Other versions
CN109575764A (en
Inventor
张彦
叶群
李刚
余洋
李培源
唐海江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Exciton Technology Co Ltd
Original Assignee
Ningbo Exciton Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Exciton Technology Co Ltd filed Critical Ningbo Exciton Technology Co Ltd
Priority to CN201811331210.3A priority Critical patent/CN109575764B/en
Publication of CN109575764A publication Critical patent/CN109575764A/en
Application granted granted Critical
Publication of CN109575764B publication Critical patent/CN109575764B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C09D163/10—Epoxy resins modified by unsaturated compounds
    • 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
    • C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D171/02—Polyalkylene oxides
    • 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
    • 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
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
    • C08J2463/10—Epoxy resins modified by unsaturated compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2467/06—Unsaturated polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
    • C08J2471/02—Polyalkylene oxides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • 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
    • 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
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

The invention relates to the technical field of high-performance coating materials, in particular to a coating composition for a diffusion brightening composite film laminating layer and a diffusion brightening composite film. The invention provides a coating composition for a diffusion brightening composite film laminating layer and a diffusion brightening composite film, aiming at solving the problem that the existing diffusion brightening composite film is easy to generate layering and crease in the cutting and carrying processes. The coating composition comprises 5-20% of acrylate oligomer, 3-10% of monomer, 0.16-1.5% of photoinitiator and 68.50-91.84% of diluent. The coating composition provided by the invention can form a good bonding effect between the top end of the prism structure and the base material, and greatly improves the anti-delamination and anti-bending capabilities of the diffusion intensifying composite film under the condition of keeping the optical performance.

Description

Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof
Technical Field
The invention relates to the technical field of high-performance coating materials, in particular to a coating composition for a diffusion and brightening composite film laminating layer, a diffusion and brightening composite film and a preparation method thereof.
Background
Liquid Crystal display (lcd) is currently the most common display technology. However, the LCD is a non-emissive display device, and a backlight unit (blu) is required to provide a high brightness and uniform Light source to achieve the display effect. The traditional backlight module is mainly formed by assembling four films, namely a lower diffusion film, a lower brightness enhancement film, an upper brightness enhancement film and an upper diffusion film. The light-emitting surface of the diffusion Film (DIF) has a diffusion layer structure, and the light function of the diffusion Film is mainly to diffuse incident light, so that the fogging effect is achieved, and the uniformity of the picture of the liquid crystal display is improved. The light emitting surface of the Brightness Enhancement Film (BEF) has a Prism layer (Prism) structure, and the light function of the Prism layer is mainly to converge incident light, so as to enhance Brightness and improve the front Brightness of the liquid crystal display picture.
Generally, in actual production, two diaphragms with different functions need to be assembled one by one, so that the production time is long, the assembly efficiency is low, and the defects of high assembly reject ratio and the like exist. With the development of the backlight module industry, the assembly yield of the backlight module in the industry is required to be higher and higher, and the assembly cost is required to be lower and lower. 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 diffusion intensifying composite film organically combines the functional advantages of a diffusion film and a intensifying film, and is an optical film which is earlier developed and most widely applied in a multilayer composite film. However, the diffusion intensifying composite film mainly provides a bonding force by bonding the prism peak and the back of the diffusion layer, and the bonding thickness is usually within 2 μm. The bonding method has the inherent problem of poor bonding force, edge separation during cutting is possibly caused, particularly corners and hangers are easy to generate creases at stressed parts during carrying, the cutting and assembling yield of the membrane is greatly influenced by the defects, and the wide application of the composite bright enhancement membrane is limited. Therefore, the mechanical stability of the diffusion intensifying composite film, especially the anti-delamination and anti-bending capabilities, is very important.
Aiming at improving the mechanical stability of a composite film (mainly a type of composite film bonded with the back surface of a diffusion layer through the peak tips of prisms), the publication number is CN 103149610A (publication date is 6 and 12 days in 2013), and the Chinese patent application entitled "a multilayer composite prism sheet and a preparation method thereof" mentions that the cutting qualification rate is improved by controlling the thickness of an adhesive layer (namely a bonding layer), wherein the thickness of the adhesive layer is 0.5-35 mu m and is 5/100-50/100 of the height of the highest edge on the surface of a lower prism sheet. However, the method is not detailed enough for describing the components of the adhesive, and the finished product has no relevant mechanical property data such as stripping force. In addition, the increased thickness of the adhesive layer can increase the stability of the composite membrane, but at the same time greatly affects the overall optical performance of the membrane. In the chinese patent application with publication No. CN 106199773 a (publication date 2016, 12, 7), entitled "an optical film stack with high mechanical stability and method for making the same", a pit of 0.5-5 μm is made on the top of a prism, and then an adhesive is fully filled in the pit to increase the adhesive force, thereby achieving the purpose of improving the stability of the optical film stack. However, the method needs secondary point distribution modification during the prism structure engraving, and pits are formed by cutting, so that the method has very high requirements on engraving and is not beneficial to wide popularization. The Chinese patent application with publication number CN 107831561A (publication date is 3/23/2018) of "a multilayer optical film" also adopts a method of prism top structure design, and can improve the adhesive strength of the composite film by more than 50% by changing the sharp angle of the prism top into a circular arc or a rough platform. However, this method also involves structural engraving problems and the effect on optical performance is unknown.
Disclosure of Invention
The invention provides a coating composition for a diffusion and brightening composite film laminating layer, a diffusion and brightening composite film and a preparation method thereof, aiming at improving the binding force between a diffusion film and a brightening film in the existing diffusion and brightening composite film. The binding layer formed by the coating composition provided by the invention has strong binding power and flexibility, and the bending resistance of the diffusion intensifying composite film is improved. The coating composition provided by the invention can form a binding layer between the top end of the prism structure of the composite film and the base material of the diffusion film, has good bonding effect, greatly improves the anti-delamination and anti-bending capabilities of the diffusion brightening composite film under the condition of keeping the optical performance, improves the mechanical stability of the diffusion brightening composite film, and solves the problem that the composite film is easy to delaminate and crease in the cutting and carrying processes.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a coating composition for a diffusion-intensifying composite film laminating layer, which comprises 5-20% of acrylate oligomer, 3-10% of monomer, 0.16-1.5% of photoinitiator and 68.50-91.84% of diluent in percentage by weight.
The proportion of the coating composition is limited in the range, and the cured laminating layer has better control property on the bonding strength and flexibility, so that the composite film product can meet the high-quality requirement of cutting use.
Further, the coating composition has a solids content of 8.16% to 31.50%.
Further, the solid content of the coating composition is preferably 15% to 18%.
The solid content of the coating composition is limited to this range, which is advantageous for the coating liquid to be uniformly applied to the surface of the substrate.
Further, the acrylate oligomer is selected from acrylate oligomers with functional groups of 4-8.
Further, the acrylate oligomer is preferably an acrylate oligomer having a functional group of 4 to 6.
Further, the coating composition comprises 5% -8.34% of acrylate oligomer, 6.26% -10% of monomer, 0.40% -0.45% of photoinitiator and 84.55% -85% of diluent by weight.
Further, the acrylate oligomer is a mixture of tetrafunctional polyether acrylic resin and hexafunctional polyester acrylic resin, and the weight ratio of the tetrafunctional polyether acrylic resin to the hexafunctional polyester acrylic resin is 1-1.5: 1. (the foregoing technical solutions include examples 5 to 6)
Further, the acrylate oligomer is a mixture of a hexafunctional polyether acrylic resin, a pentafunctional polyester acrylic resin, and a tetrafunctional polyester acrylic resin, and the weight ratio of the acrylate oligomer to the pentafunctional polyester acrylic resin is 3: 3: 4. (the foregoing technical solutions include example 8)
Further, the acrylate oligomer is selected from one or a combination of at least two of epoxy acrylic resin, polyester acrylic resin or polyether acrylic resin.
Furthermore, the epoxy acrylic resin, the polyester acrylic resin and the polyether acrylic resin are ultraviolet curing resins.
The acrylate oligomer has at least 4 functional groups, also referred to as a multifunctional acrylate oligomer.
Further, the functional group in the multifunctional acrylate oligomer is selected from one or a combination of hydroxyl (-OH) or carboxyl (-COOH) groups.
The functional group in the multifunctional acrylate oligomer can provide the surface polymerization degree of the laminating layer, and the adhesion of the prism structure and the PET substrate on the back of the diffusion layer is ensured. When the number of functional groups in the acrylate oligomer is more than 8, the degree of polymerization of the adhesive layer may be too high, and the brittleness may be increased, thereby affecting the bending resistance.
Further, the acrylic resin monomer is selected from 3-6 functional polyurethane acrylic resin monomers. Further, the acrylic resin monomer has a glass transition temperature (Tg point) of 60 ℃ or less. The monomer with low glass transition temperature has flexibility, and can enhance the bending resistance of the coating.
Further, the acrylic resin monomer is preferably a trifunctional urethane acrylic resin monomer.
Further, the polyurethane acrylic resin monomer is selected from one or a combination of at least two of aliphatic polyurethane acrylic resin, alicyclic polyurethane acrylic resin or aromatic polyurethane acrylic resin.
Further, the urethane acrylic monomer is preferably an aliphatic urethane acrylic.
Further, the acrylic resin monomer is preferably a tri-official aliphatic polyurethane acrylic resin.
Further, the glass transition temperature (Tg point) of the urethane acrylic resin monomer is less than or equal to 60 ℃.
Further, the glass transition temperature (Tg point) of the urethane acrylic resin monomer is preferably 30 ℃ or less. Further, the glass transition temperature (Tg point) of the urethane acrylic resin monomer is preferably 18 ℃ or less.
The acrylic resin monomer plays a role in adjusting the flexibility of the cured coating, and the acrylic resin monomer and the acrylic resin oligomer can realize the regulation and control of the adhesive force and the bending resistance of the adhesive layer.
The acrylate oligomer is abbreviated as oligomer.
Further, the weight ratio of the acrylic resin monomer to the oligomer is 0.15-2: 1.
further, the weight ratio of the acrylic resin monomer to the oligomer is preferably 0.75 to 2: 1.
further, the photoinitiator is preferably one or a combination of Irgacure 184 and Irgacure 754. Further, the photoinitiator is a mixture of Irgacure 184 and Irgacure 754, and the weight ratio is 1: 1.
further, the weight ratio of the photoinitiator to the acrylate is 2-5: 100, the acrylate comprises acrylate oligomer and monomer.
Further, the weight ratio of the photoinitiator to the acrylate is preferably 2.74-3: 100.
further, the diluent is selected from organic solvents. The organic solvent is selected from one or the combination of at least two of ethyl acetate, butyl acetate, butanone and cyclohexanone. Further, the diluent is a mixture of butyl acetate and butanone, and the weight ratio of the butyl acetate to the butanone is 1: 1.
furthermore, the coating composition is mainly used for a laminating layer of the diffusion brightening composite film so as to improve the delamination resistance and bending resistance of the diffusion brightening composite film.
The invention also provides a diffusion intensifying composite film, which sequentially comprises a intensifying film, a binding layer and a diffusion film; the brightness enhancement film comprises a first substrate and a prism layer, wherein the prism layer is attached to the surface of the first substrate; the diffusion film comprises a second substrate and a diffusion layer, wherein the diffusion layer is attached to one surface of the second substrate; the laminating layer is arranged on the other surface of the second base material and used for connecting the prism layer and the second base material layer.
The prism layer is composed of a plurality of micro-prism structures (such as prism strips or prism columns), and the binding layer is connected with the peak tips of the prism structures and the second base material. The first substrate is also called a substrate of a brightness enhancement film (or brightness enhancement film). The second substrate is also referred to as the substrate of the diffusion membrane. The first base material and the second base material may be the same in material and thickness or different in thickness.
Further, the height of the micro-prism structure of the prism layer is 15-40 μm, and the edge angle is 90 degrees.
Further, the peak pitch of two adjacent prism structures (i.e. two adjacent prism bars) of the prism layer is 30-80 μm.
Further, the height of the microprism structure of the prism layer is 35 μm, and the edge angle is 90 °. The peak pitch of two adjacent prism structures (i.e. two adjacent prism stripes) of the prism layer was 70 μm.
Further, the back coating haze (light incident surface) of the prism layer is 3% -5%.
Furthermore, the diffusion layer is formed by uniformly mixing diffusion particles and a resin material, the diffusion particles are made of polymethyl methacrylate, the particle size of the diffusion particles is polydisperse, and the value of the particle size is 2-30 micrometers.
Further, the weight ratio of the diffusion particles to the resin material is 0.6-1.2: 1.
further, the weight ratio of the diffusion particles to the resin material is 0.6: 1.
further, the resin material is formed by crosslinking and curing a polyol copolymer and an isocyanate trimer.
Further, the polyol copolymer is selected from one or a combination of at least two of polyethylene adipate glycol-propylene glycol, polyethylene adipate glycol-1, 4-butanediol glycol, or neopentyl adipate glycol-1, 6-hexanediol glycol. Further, the polyol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio of the two is 4: 6.
further, the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10.
further, the haze of the diffusion layer is 75% -95%.
The invention also provides a preparation method of the diffusion intensifying composite film, which comprises the following steps:
(1) uniformly mixing the diffusion particles with a resin material, coating the mixture on a second substrate, aging the mixture in an oven at 100 ℃ for 3mim, and curing the mixture at 60 ℃ for 24 hours to obtain a diffusion film; the second substrate is an optical film;
(2) preparing a micro prism layer with a specific structure on the other substrate with the back protective layer to obtain a prism film; the base material is the same as that used for the diffusion film;
(3) coating a layer of coating composition provided by the invention on the back surface of the base material of the diffusion film obtained in the step (1) to form a laminating layer, aging in a drying oven at 100 ℃ for 3min, compounding the prism film obtained in the step (2) by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 300-2And rolling the finished product.
Furthermore, the dry film thickness of the laminating layer is 0.5-2 μm.
Further, the dry film thickness of the laminating layer is preferably 0.6-1.5 μm.
Further, the dry film thickness of the laminating layer is most preferably 0.8-0.85 μm.
Further, the material of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 50-250 μm. Furthermore, the material of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 μm.
Furthermore, the surface of the base material is treated with a chemical base (Primer) to improve the adhesion between the base material layer and the laminating layer.
The coating composition provided by the invention can realize high-efficiency bonding force between the top end of the prism structure and the base material after being cured, and has certain flexibility. The diffusion intensifying composite film provided by the invention has good delamination resistance and bending resistance, and can improve the cutting and assembling yield.
Drawings
FIG. 1 is a schematic cross-sectional view of a diffusion and light-enhancing composite film according to the present invention;
Detailed Description
In order to make the structure and features of the invention more comprehensible, preferred embodiments of the invention are described in detail below:
as shown in fig. 1, the present invention also provides a diffusion brightening composite film, which includes a brightening film 10, a bonding layer 30 and a diffusion film 20; the brightness enhancement film comprises a first substrate and a prism layer, wherein the prism layer is attached to the surface of the first substrate; the diffusion film comprises a second substrate and a diffusion layer, wherein the diffusion layer is attached to one surface of the second substrate; the laminating layer is arranged on the other surface of the second base material and used for connecting the prism layer and the second base material layer.
The materials and equipment used in the invention are the existing materials and equipment.
The preparation method of the coating composition provided by the invention comprises the following steps: uniformly mixing the acrylate oligomer, the polyurethane acrylate monomer and the photoinitiator according to a ratio, then adding a diluent to adjust the viscosity to 11-13s, uniformly stirring, and filtering to obtain the coating composition capable of being coated on the base material.
Furthermore, the shading treatment is noticed in the preparation process.
Further, the viscosity of the coating composition was measured using a coat-4 cup.
The application method of the coating composition as the diffusion and brightening composite film laminating layer adopts a wire bar coater to uniformly coat the uniformly mixed coating composition on the blank substrate on the back of the diffusion layer, baking the blank substrate at 100 ℃ for 3min, compounding the lower prism layer by using a compounding roller, and then carrying out UV curing under an ultraviolet curing lamp under the curing condition of 300-600mj/cm2To obtain delamination and bending resistantAnd (3) compounding the membrane.
The main properties of the diffusion brightened composite films provided in the examples and comparative examples of the present invention were tested in the following manner.
1. Haze test: the haze of each diffusion layer was measured with reference to the standard of GB/T25273-2010 integration sphere method for measuring haze of thin films for Liquid Crystal Displays (LCDs).
2. And (3) testing the peeling force: the peeling force of the diffusion brightening composite film using different formulations of the adhesive layer is tested according to the standard of GB/T25256-.
3. And (3) bending resistance test: and placing the diffusion intensifying composite film to be measured on a horizontal glass plate, fixing one side and the center of the composite film, slowly lifting the other side, bending the composite film along the center point to the fixed side, and recording the bent angle when layering occurs.
4. Testing the brightness gain: a diffusion film was tested for brightness L using a special backlight0And then testing the brightness of the same diffusion film and the diffusion intensifying composite film to be L1Then the brightness gain of the diffusion intensifying composite film is L1/L0。
The following examples further illustrate the conformable layer coating compositions and diffusion enhanced composite films provided by the present invention.
The first substrate and the second substrate in the examples and comparative examples are the same and will be referred to simply as substrates. The polymethyl methacrylate particles in the diffusion layers in the examples and comparative examples had a particle size of 2 to 30 μm.
Example 1:
the invention provides a coating composition for a laminated layer of a diffusion brightening composite film and the diffusion brightening composite film.
The coating composition comprises: 20% of acrylate oligomer, 10% of monomer, 1.5% of photoinitiator and 68.5% of diluent. The acrylate oligomer is tetrafunctional polyester acrylic resin; the monomer is tricyclic alicyclic polyurethane acrylic resin, the glass transition temperature is 30 ℃, and the weight ratio of the monomer to the acrylate oligomer is 0.5: 1; the photoinitiator is Irgacure 184, and the weight ratio of the photoinitiator to acrylic resin is 5: 100, respectively; the diluent is butanone. The solid content of the coating composition was 31.5%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene adipate-propylene glycol) glycol, poly (ethylene adipate-1, 4-butylene glycol) and poly (neopentyl adipate-1, 6-hexanediol) glycol, and the weight ratio is 1: 1: 1; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 0.6: 1. the haze of the diffusion layer was 75%.
The height of the micro-prism structure of the prism layer is 15 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 30 μm.
Uniformly mixing the coating composition, coating the coating composition on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 600mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 250 mu m. The dry film thickness of the obtained adhesive layer was 2 μm.
Example 2:
a coating composition and a diffusion brightened composite film as provided in example 1 for use in a conformable layer of a diffusion brightened composite film, the coating composition comprising: 5% of acrylate oligomer, 3% of monomer, 0.16% of photoinitiator and 91.84% of diluent. The acrylate oligomer is hexa-functional epoxy acrylic resin; the monomer is hexa-functional aromatic polyurethane acrylic resin, the glass transition temperature is 60 ℃, and the weight ratio of the monomer to the acrylate oligomer is 0.6: 1; the photoinitiator is Irgacure 184, and the weight ratio of the photoinitiator to acrylic resin is 2: 100, respectively; the diluent is ethyl acetate. The solid content of the coating composition was 8.16%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 1: 1. the haze of the diffusion layer was 85%.
The height of the micro-prism structure of the prism layer is 40 mu m, and the edge angle is 90 degrees. The peak tip spacing of two adjacent prism structures of the prism layer is 80 μm.
Uniformly mixing the coating composition, coating the coating composition on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 300mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 50 mu m. The dry film thickness of the obtained adhesive layer was 0.5. mu.m.
Example 3:
a coating composition and a diffusion brightened composite film as provided in example 1 for use in a conformable layer of a diffusion brightened composite film, the coating composition comprising: 5% of acrylate oligomer, 4.5% of monomer, 0.29% of photoinitiator and 90.21% of diluent. The acrylate oligomer is hexa-functional epoxy acrylic resin; the monomer is four-membered aliphatic polyurethane acrylic resin, the glass transition temperature is 30 ℃, and the weight ratio of the monomer to the acrylate oligomer is 0.9: 1; the photoinitiator is Irgacure 184, and the weight ratio of the photoinitiator to acrylic resin is 3: 100, respectively; the diluent is ethyl acetate. The solid content of the coating composition was 9.79%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 1.0: 1. the haze of the diffusion layer was 85%.
The height of the micro-prism structure of the prism layer is 40 mu m, and the edge angle is 90 degrees. The peak tip spacing of two adjacent prism structures of the prism layer is 80 μm.
Uniformly mixing the coating composition, coating the coating composition on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 300mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 mu m. The dry film thickness of the obtained adhesive layer was 0.6. mu.m.
Example 4:
a coating composition and a diffusion brightened composite film as provided in example 1 for use in a conformable layer of a diffusion brightened composite film, the coating composition comprising: 20% of acrylate oligomer, 3% of monomer, 0.69% of photoinitiator and 76.31% of diluent. The acrylate oligomer is octafunctional polyether acrylic resin; the monomer is four-membered aliphatic polyurethane acrylic resin, the glass transition temperature is 30 ℃, and the weight ratio of the monomer to the acrylate oligomer is 0.15: 1; the photoinitiator is Irgacure 754, and the weight ratio of the photoinitiator to acrylic resin is 3: 100, respectively; the diluent is butyl acetate. The solid content of the coating composition is 23.69%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 1.2: 1. the haze of the diffusion layer was 95%.
The height of the micro-prism structure of the prism layer is 35 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 70 μm.
Uniformly mixing the coating composition, coating the coating composition on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 600mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 188 micrometers. The dry film thickness of the obtained adhesive layer was 1.5. mu.m.
Example 5:
a coating composition and a diffusion brightened composite film as provided in example 1 for use in a conformable layer of a diffusion brightened composite film, the coating composition comprising: 5% of acrylate oligomer, 10% of monomer, 0.45% of photoinitiator and 84.55% of diluent. The acrylate oligomer is a mixture of tetrafunctional polyether acrylic resin and hexafunctional polyester acrylic resin, and the weight ratio is 1: 1; the monomer is a three-part aliphatic polyurethane acrylic resin, the glass transition temperature is 18 ℃, and the weight ratio of the monomer to the acrylate oligomer is 2: 1; the photoinitiator is Irgacure 754, and the weight ratio of the photoinitiator to acrylic resin is 3: 100, respectively; the diluent is cyclohexanone. The solid content of the coating composition was 15.45%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 0.6: 1. the haze of the diffusion layer was 75%.
The height of the micro-prism structure of the prism layer is 35 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 70 μm.
Uniformly mixing the coating composition, coating the coating composition on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 300mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 mu m. The dry film thickness of the obtained adhesive layer was 0.85. mu.m.
Example 6:
a coating composition and a diffusion brightened composite film as provided in example 1 for use in a conformable layer of a diffusion brightened composite film, the coating composition comprising: 7.3% of acrylate oligomer, 7.3% of monomer, 0.40% of photoinitiator and 85% of diluent. The acrylate oligomer is a mixture of tetrafunctional polyester acrylic resin and hexafunctional polyester acrylic resin, and the weight ratio is 3: 2; the monomer is a three-part aliphatic polyurethane acrylic resin, the glass transition temperature is 18 ℃, and the weight ratio of the monomer to the acrylate oligomer is 1: 1; the photoinitiator is a mixture of Irgacure 184 and Irgacure 754, and the weight ratio is 1: 1, the weight ratio of the photoinitiator to the acrylic resin is 2.74: 100, respectively; the diluent is a mixture of butyl acetate and butanone, and the weight ratio of the butyl acetate to the butanone is 1: 1. the solid content of the coating composition is 15%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 0.6: 1. the haze of the diffusion layer was 75%.
The height of the micro-prism structure of the prism layer is 35 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 70 μm.
Uniformly mixing the coating composition, coating the coating composition on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 450mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 mu m. The dry film thickness of the obtained adhesive layer was 0.8. mu.m.
Example 7:
a coating composition and a diffusion brightened composite film as provided in example 1 for use in a conformable layer of a diffusion brightened composite film, the coating composition comprising: 11.76% of acrylate oligomer, 5.88% of monomer, 0.36% of photoinitiator and 82% of diluent. The acrylate oligomer is a mixture of hexafunctional polyether acrylic resin, pentafunctional polyester acrylic resin and tetrafunctional polyester acrylic resin, and the weight ratio is 3: 1: 6; the monomer is a three-part aliphatic polyurethane acrylic resin, the glass transition temperature is 18 ℃, and the weight ratio of the monomer to the acrylate oligomer is 0.5: 1; the photoinitiator is a mixture of Irgacure 184 and Irgacure 754, and the weight ratio is 1: 1, the weight ratio of the photoinitiator to the acrylic resin is 2.04: 100, respectively; the diluent is a mixture of ethyl acetate, butyl acetate and butanone, and the weight ratio of the diluent to the methyl ethyl acetate is 1: 1: 1. the solid content of the coating composition is 18 percent.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 0.6: 1. the haze of the diffusion layer was 75%.
The height of the micro-prism structure of the prism layer is 35 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 70 μm.
Uniformly mixing the coating composition, coating the coating composition on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compounding roller, and carrying out UV curing under an ultraviolet curing lamp under the curing condition of 450mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 mu m. The dry film thickness of the obtained adhesive layer was 1.0. mu.m.
Example 8:
a coating composition and a diffusion brightened composite film as provided in example 1 for use in a conformable layer of a diffusion brightened composite film, the coating composition comprising: 8.34% of acrylate oligomer, 6.26% of monomer, 0.40% of photoinitiator and 85% of diluent. The acrylate oligomer is a mixture of hexafunctional polyether acrylic resin, pentafunctional polyester acrylic resin and tetrafunctional polyester acrylic resin, and the weight ratio is 3: 3: 4; the monomer is a three-part aliphatic polyurethane acrylic resin, the glass transition temperature is 18 ℃, and the weight ratio of the monomer to the acrylate oligomer is 0.75: 1; the photoinitiator is Irgacure 184, and the weight ratio of the Irgacure 184 to the acrylic resin is 2.74: 100, respectively; the diluent is a mixture of butyl acetate and butanone, and the weight ratio of the butyl acetate to the butanone is 1: 1. the solid content of the coating composition is 15%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 0.6: 1. the haze of the diffusion layer was 75%.
The height of the micro-prism structure of the prism layer is 35 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 70 μm.
Applying said coatingThe layer composition is uniformly mixed, then coated on a base material on the back of the diffusion layer, baked for 3min at 100 ℃, then compounded with the prism layer by a compound roller, and then UV cured under an ultraviolet curing lamp, wherein the curing condition is 450mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 mu m. The dry film thickness of the obtained adhesive layer was 0.8. mu.m.
Comparative example 1:
a coating composition for a diffusion brightened composite film as provided in example 6, except that the coating composition comprises: 7.30% of acrylate oligomer, 7.30% of monomer, 0.40% of photoinitiator and 85% of diluent. The acrylate oligomer is a dodecafunctional polyester acrylic resin; the monomer is a three-part aliphatic polyurethane acrylic resin, the glass transition temperature is 18 ℃, and the weight ratio of the monomer to the acrylate oligomer is 1: 1; the photoinitiator is a mixture of Irgacure 184 and Irgacure 754, and the weight ratio is 1: 1, the weight ratio of the photoinitiator to the acrylic resin is 2.74: 100, respectively; the diluent is a mixture of butyl acetate and butanone, and the weight ratio of the butyl acetate to the butanone is 1: 1. the solid content of the coating composition is 15%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 0.6: 1. the haze of the diffusion layer was 75%.
The height of the micro-prism structure of the prism layer is 35 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 70 μm.
Mixing the coating composition uniformly, coating on the base material on the back of the diffusion layer, baking at 100 ℃ for 3min, and compounding by using a composite rollerThe prism layer is subjected to UV curing under an ultraviolet curing lamp, and the curing condition is 450mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 mu m. The dry film thickness of the obtained adhesive layer was 0.8. mu.m.
Comparative example 2:
a coating composition for a diffusion brightened composite film as provided in example 6, except that the coating composition comprises: 7.30% of acrylate oligomer, 7.30% of monomer, 0.40% of photoinitiator and 85% of diluent. The acrylate oligomer is a mixture of tetrafunctional polyester acrylic resin and hexafunctional polyester acrylic resin, and the weight ratio of the acrylate oligomer to the hexafunctional polyester acrylic resin is 3: 2; the monomer is a hexa-functional aromatic polyurethane acrylic resin monomer, the glass transition temperature is 80 ℃, and the weight ratio of the monomer to the acrylate oligomer is 1: 1; the photoinitiator is a mixture of Irgacure 184 and Irgacure 754, and the weight ratio is 1: 1, the weight ratio of the photoinitiator to the acrylic resin is 2.74: 100, respectively; the diluent is a mixture of butyl acetate and butanone, and the weight ratio of the butyl acetate to the butanone is 1: 1. the solid content of the coating composition is 15%.
The diffusion layer includes: polyol copolymer, isocyanate trimer, polymethyl methacrylate particles. The polyalcohol copolymer is a mixture of poly (ethylene glycol adipate-propylene glycol) and poly (neopentyl glycol adipate-1, 6-hexanediol glycol), and the weight ratio is 4: 6; the weight ratio of the isocyanate trimer to the polyol copolymer is 1: 10; the weight ratio of the polymethyl methacrylate particles to the polyol copolymer is 0.6: 1. the haze of the diffusion layer was 75%.
The height of the micro-prism structure of the prism layer is 35 mu m, and the edge angle is 90 degrees. The pitch of the peaks of two adjacent prism structures of the prism layer is 70 μm.
Mixing the coating composition uniformly, coating the mixture on a base material on the back of a diffusion layer, baking the base material at 100 ℃ for 3min, compounding the prism layer by using a compound roller, and curing the prism layer by ultraviolet lightUV curing is carried out under a lamp, and the curing condition is 450mj/cm2And rolling the finished product. The surface of the base material is treated by a chemical substrate, the component of the base material is polyethylene terephthalate (PET), and the thickness of the base material is 125 mu m. The dry film thickness of the obtained adhesive layer was 0.8. mu.m.
TABLE 1 results of the Performance test of the coatings provided in examples 1-8 and comparative examples 1-2
Figure BDA0001860035930000171
As can be seen from Table 1, the coating composition for the laminated layer of the diffusion and brightening composite film provided by the invention has good adhesion and bending resistance. By adjusting the contents of the oligomer and the monomer acrylic resin, the functionality of the oligomer and the glass transition temperature of the monomer, the adhesive force of the coating can be improved under a certain coating thickness, and the bending resistance of the composite membrane is improved. As can be seen from comparative example 1, the coating composition using only the dodecafunctional acrylate oligomer can maintain good optical properties at a certain coating thickness, but the self-bonding force and the anti-buckling property of the coating are poor; as can be seen from comparative example 2, the coating composition using the high Tg monomer is also poor in adhesion and flex resistance. The bonding layers formed by curing the coating compositions provided by the embodiments 5, 6 and 8 of the invention have better comprehensive performance, and not only can maintain the brightness of the composite membrane, but also have higher peeling force and bending resistance.
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 (7)

1. The coating composition for the diffusion intensifying composite film laminating layer is characterized by comprising 5-8.34% of acrylate oligomer, 6.26-10% of monomer, 0.40-0.45% of photoinitiator and 84.55-85% of diluent, wherein the percentages are weight percentages;
the acrylate oligomer is a mixture of tetrafunctional polyether acrylic resin and hexafunctional polyester acrylic resin, and the weight ratio of the tetrafunctional polyether acrylic resin to the hexafunctional polyester acrylic resin is 1-1.5: 1;
or the acrylate oligomer is a mixture of a hexafunctional polyether acrylic resin, a pentafunctional polyester acrylic resin and a tetrafunctional polyester acrylic resin, and the weight ratio of the acrylate oligomer to the tetrafunctional polyester acrylic resin is 3: 3: 4;
the monomer is selected from 3-6 functional polyurethane acrylic resin monomer, and the glass transition temperature of the acrylic resin monomer is less than or equal to 60 ℃; the diluent is selected from organic solvents.
2. The coating composition for the conforming layer of a diffusion and brightening composite film of claim 1, wherein the coating composition has a solids content of from 8.16% to 31.50%.
3. The diffusion brightening composite film is characterized by sequentially comprising a brightening film, a binding layer and a diffusion film; the brightness enhancement film comprises a first substrate and a prism layer, wherein the prism layer is attached to the surface of the first substrate; the diffusion film comprises a second substrate and a diffusion layer, wherein the diffusion layer is attached to one surface of the second substrate; the laminating layer is arranged on the other surface of the second base material and is used for connecting the prism layer and the second base material layer; the raw material of the lamination layer adopts the coating composition for the lamination layer of the diffusion brightening composite film as described in claim 1 or 2.
4. The composite film of claim 3, wherein the height of the microprismatic structure of the prismatic layer is 15 to 40 μm and the angular extent is 90 °.
5. The composite diffusion and brightening film according to claim 4, wherein the diffusion layer is formed by uniformly mixing diffusion particles and a resin material, the diffusion particles are made of polymethyl methacrylate, the diameters of the diffusion particles are 2-30 μm, and the resin material is formed by crosslinking and curing a polyol copolymer and an isocyanate trimer.
6. A method for preparing the diffusion brightening composite film according to any of claims 3 to 5, characterized in that the preparation method comprises the following steps:
(1) uniformly mixing the diffusion particles with a resin material, coating the mixture on a second substrate, aging the mixture in an oven at 100 ℃ for 3mim, and curing the mixture at 60 ℃ for 24 hours to obtain a diffusion film;
(2) preparing a prism layer on the other substrate with the back surface protective layer to obtain a brightness enhancement film;
(3) coating a layer of laminating layer on the back surface of the base material of the diffusion film obtained in the step (1), aging in an oven at 100 ℃ for 3min, compounding the brightness enhancement film obtained in the step (2) by using a compounding roller, and performing UV curing under an ultraviolet curing lamp under the curing condition of 300-600 mJ/cm-2And rolling the finished product.
7. The method for preparing the diffusion and brightening composite film according to claim 6, wherein the dry film thickness of the attaching layer is 0.5-2 μm, the base material is polyethylene terephthalate (PET), and the thickness of the base material is 50-250 μm.
CN201811331210.3A 2018-11-09 2018-11-09 Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof Active CN109575764B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811331210.3A CN109575764B (en) 2018-11-09 2018-11-09 Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811331210.3A CN109575764B (en) 2018-11-09 2018-11-09 Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof

Publications (2)

Publication Number Publication Date
CN109575764A CN109575764A (en) 2019-04-05
CN109575764B true CN109575764B (en) 2021-08-17

Family

ID=65922056

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811331210.3A Active CN109575764B (en) 2018-11-09 2018-11-09 Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof

Country Status (1)

Country Link
CN (1) CN109575764B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111487700A (en) * 2020-05-28 2020-08-04 马鞍山东毅新材料科技有限公司 Dynamic backlight L ED optical composite film and preparation method thereof
CN113589414A (en) * 2021-08-05 2021-11-02 京东方科技集团股份有限公司 Optical film, preparation method thereof, backlight module and display device
CN114089453B (en) * 2021-12-31 2023-09-01 凯鑫森(上海)功能性薄膜产业股份有限公司 Preparation method of anti-interference scratch-proof laminating film, laminating film and screen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107831561A (en) * 2016-12-02 2018-03-23 常州华威新材料有限公司 A kind of multi-layer optical film
CN108587484A (en) * 2018-03-28 2018-09-28 广州慧谷工程材料有限公司 A kind of optical film adhesive for being bonded entirely and its preparation method and application and based on its optical film

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004133021A (en) * 2002-10-08 2004-04-30 Teijin Dupont Films Japan Ltd Polyester film for liquid crystal display device light diffusion plate and light diffusion plate
CN101993678B (en) * 2009-08-26 2013-08-07 比亚迪股份有限公司 Ultraviolet curing glue and preparation method thereof
KR20140123779A (en) * 2013-04-15 2014-10-23 동우 화인켐 주식회사 Photocurable Coating Composition, Coating Film and Polarizing Plate Using the Same
CN106147636A (en) * 2015-04-01 2016-11-23 上海精涂新材料技术有限公司 A kind of hardening protecting film and production method thereof
CN107384292A (en) * 2017-05-27 2017-11-24 张家港康得新光电材料有限公司 The preparation method of cementitious compositions, optical compound film and optical compound film
CN107603496B (en) * 2017-08-15 2021-02-19 张家港康得新光电材料有限公司 Ultraviolet light curing adhesive and manufacturing method thereof
CN108549177A (en) * 2018-04-26 2018-09-18 深圳Tcl新技术有限公司 Optical compound film, backlight and liquid crystal display die set

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107831561A (en) * 2016-12-02 2018-03-23 常州华威新材料有限公司 A kind of multi-layer optical film
CN108587484A (en) * 2018-03-28 2018-09-28 广州慧谷工程材料有限公司 A kind of optical film adhesive for being bonded entirely and its preparation method and application and based on its optical film

Also Published As

Publication number Publication date
CN109575764A (en) 2019-04-05

Similar Documents

Publication Publication Date Title
CN109575764B (en) Coating composition for diffusion brightening composite film laminating layer, diffusion brightening composite film and preparation method thereof
CN109609020B (en) Anti-warping optical brightness enhancement film and preparation method thereof
KR101757962B1 (en) Pressure sensitive adhsive composition
CN102859403B (en) Polarizer and the liquid crystal indicator comprising this Polarizer
KR101749359B1 (en) Polarizer
CN109683377B (en) High-haze adhesive layer composition and high-haze high-brightness composite brightness enhancement film
KR101628437B1 (en) Adhesive film, adhesive composition for the same and display member comprising the same
CN102870019A (en) Polarizing plate
CN103370387A (en) Optically clear adhesive, method of use and articles therefrom
CN111732866B (en) High-adhesion toughening primer coating for transparent PI (polyimide) substrate
CN110484180B (en) High-flexibility high-hardness low-warpage hardening glue, hardening protective film and preparation method
WO2018174198A1 (en) Adhesive composition, adhesive, and laminated body
JP2020512439A (en) Optically transparent high-performance photocurable adhesive
KR102044248B1 (en) Multi layered optical adhesive sheet, method preparing multi layered optical adhesive sheet and touch screen panel
CN112300431A (en) Optical diffusion film
CN109633799B (en) Coating composition for diffusion brightening composite film laminating layer and diffusion brightening composite film
CN101713910B (en) Method of producing multilayer coating film
JP6427954B2 (en) Flexible transparent substrate
JP6427955B2 (en) Flexible transparent substrate
CN111440494B (en) Coating composition and polarizer
CN117050713B (en) OCA optical adhesive with high ink level difference filling capacity, adhesive tape and preparation method thereof
JP6427953B2 (en) Flexible transparent substrate
CN114539953B (en) OCA glue and preparation method and application thereof
CN111993739B (en) Transparent polyester film for multilayer coextrusion optics and preparation method thereof
Kim et al. Ink-Step Adaptability and reliability of maleimide-functionalized UV-curable optically clear adhesives

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CB03 Change of inventor or designer information

Inventor after: Ye Qun

Inventor after: Zhang Yan

Inventor after: Li Gang

Inventor after: Yu Yang

Inventor after: Li Peiyuan

Inventor after: Tang Haijiang

Inventor before: Zhang Yan

Inventor before: Ye Qun

Inventor before: Li Gang

Inventor before: Yu Yang

Inventor before: Li Peiyuan

Inventor before: Tang Haijiang

CB03 Change of inventor or designer information
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20190405

Assignee: NINGBO JIANGBEI EXCITON NEW MATERIAL TECHNOLOGY Co.,Ltd.

Assignor: Ningbo Exciton Technology Co.,Ltd.

Contract record no.: X2023330000247

Denomination of invention: A coating composition for diffusion enhanced composite film lamination layer, and a diffusion enhanced composite film and its preparation method

Granted publication date: 20210817

License type: Common License

Record date: 20230424

EE01 Entry into force of recordation of patent licensing contract