CN106707378A - Anti-scratch diffusion film and backlight module - Google Patents
Anti-scratch diffusion film and backlight module Download PDFInfo
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- CN106707378A CN106707378A CN201611209415.5A CN201611209415A CN106707378A CN 106707378 A CN106707378 A CN 106707378A CN 201611209415 A CN201611209415 A CN 201611209415A CN 106707378 A CN106707378 A CN 106707378A
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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
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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Abstract
The invention provides an anti-scratch diffusion film. The anti-scratch diffusion film comprises a transparent substrate, a main diffusion layer arranged on the upper surface of the transparent substrate, and an anti-scratch back layer arranged on the lower surface of the transparent substrate. The coating liquid of the main diffusion layer comprises, by weight, 30% to 80% of water-soluble resin emulsion, 10% to 65% of light-diffusing particles and 1% to 5% of functional adjuvant. The water-soluble resin emulsion contains water-soluble acrylic resin. The percentage of the weight of the water-soluble acrylic resin in the weight of the water-soluble resin emulsion is 40 to 70%. The light-diffusing particles are composed of large particles and small particles, wherein large particles and small particles have different particle sizes. According to the invention, the anti-scratch diffusion film nonflammable and non-explosive, and prevent fire safety hazards; the large particles in the light-diffusing particles use elastic anti-scratch particles; the problem that a prism film is easily scratched when the existing optical diffusion film is applied to a backlight module is solved; the product quality is improve; and the production cost is reduced.
Description
Technical field
The present invention relates to a kind of anti scuffing diffusion barrier and backlight module.
Background technology
In recent years, various liquid crystal flat-panel Display Techniques and product are developed rapidly, and flat-panel monitor liquid crystal display is at present should
With most wide, the most flat panel display technology of product, product is extensively using each field, such as LCD, LED class lcd technology
It is applied to TV, mobile phone, notebook computer, desktop computer monitor, work station, industry monitoring device, global positioning satellite system
System (GPS), personal data treatment, game machine, videophone, portable V CD, DVD and some other portable unit.Liquid crystal display
Device is mainly including liquid crystal panel, backlight module etc..Backlight module is one of key part and component of liquid crystal display device, and function exists
In well-off brightness and the light source being evenly distributed, make its normal display image.Backlight module mainly includes light source, reflection
Piece, light guide plate, lower diffusion barrier, prismatic lens and upper diffusion barrier.Diffusion barrier is used in backlight module (BLU), its function is by linear light
Source or spot light are scattered in area source, so as to provide flat-panel monitor one uniform area source.
While usage amount of the diffusion barrier in display screen gradually increases, for diffusion barrier solvent-borne type glue yield also with
Increase, the effect of the solvent-borne type glue is the diffusing reflection for increasing light, reduces the influence to the intensity of light, and that thus brings is negative
Effect be the organic solvent for producing in process of production also gradually increasing, and not yet obtain effective treatment and control.Tool
For body, because the coating of diffusion barrier is carried out in a dustless workshop, place is relatively closed, and solvent is difficult row
Go out, the solvent volatilization produced to glue is excluded by air feed system completely, but existing method also is difficult to all discharge solvent, this
Very big influence is brought to the healthy of shop worker；Even if all discharges, also surrounding enviroment are caused with greatly harm.This
Outward, substantial amounts of organic solvent is produced in a relatively closed space, the strick precaution to fire also brings very big pressure.In order to
The discharge of organic solvent is reduced, part company puts into a huge sum of money and builds recovery system, and its construction cost and operating cost are very high,
The burden of enterprise is exacerbated significantly.
In summary, influence, the safety guarantor of raising operation employee of the discharge, reduction of organic solvent to environment how to be reduced
Shield, as a great problem that the art is badly in need of solving.Existing optical diffusion is all from solvent type resin simultaneously
Hard diffusion particle is added as film forming matter, what is formed after film forming is hard coat, folding is produced after easily being bent in processing use
Trace and scrap.Meanwhile, existing optical diffusion easily scratches prism film when backlight module is applied to, and causes product
Quality Down, therefore existing optical diffusion also needs further improvement.
The content of the invention
The purpose of the present invention be for during diffusion barrier is prepared, reduce because volatile solvent is used trigger fire,
The possibility for firing, and harm of the pernicious gas to personnel's body is reduced, while overcoming what existing solvent type resin system was present
The defect of scratch resistance difference, and a kind of anti scuffing diffusion barrier of aqueous, environmental protective is provided.
Technical program of the present invention lies in：
A kind of anti scuffing diffusion barrier, including transparent base, be arranged on the main diffusion layer of transparent base upper surface and be arranged on
The anti scuffing backing layer of transparent base lower surface, the coating fluid component and percentage by weight of the main diffusion layer are：
Water-soluble resin emulsion 30%~80%
Light diffusion particle 10%~65%
Function additive 1%~5%
Contain water soluble acrylic resin in the water-soluble resin emulsion, water soluble acrylic resin's weight accounts for institute
It is 40%~70% to state the percentage of water-soluble resin emulsion weight, the smooth diffusion particle by different-grain diameter size big particle
Constituted with granule sub-portfolio, the big particle is polybutyl methacrylate (PBMA), polyisobutyl methacrylate (PIBMA)
In one or two, big particle diameter be 30 μm~50 μm, big particle weight accounts for light diffusion particle total weight percent
10%~40%.
Above-mentioned anti scuffing diffusion barrier, in described anti scuffing diffusion barrier main diffusion layer coating fluid, small particles are poly- methyl-prop
One or more in e pioic acid methyl ester (PMMA), polystyrene (PS), organic silicon particle, the particle diameter distribution of the small particles exists
0.5 μm~30 μm, small particles weight accounts for the 60%~90% of light diffusion particle total weight percent, and the main diffusion layer applies thickness
Spend is the 1/2~3/4 of maximum particle diameter.
Above-mentioned anti scuffing diffusion barrier, in described anti scuffing diffusion barrier main diffusion layer coating fluid, small particles are with one layer or two
Layer is uniformly distributed in main diffusion layer at random, and big particle is spaced in small particles.
Above-mentioned anti scuffing diffusion barrier, in described anti scuffing diffusion barrier main diffusion layer coating fluid, function additive includes crosslinking
Agent, wetting dispersing agent.
Above-mentioned anti scuffing diffusion barrier, in the anti scuffing diffusion barrier main diffusion layer coating fluid, crosslinking agent is hydrophily fat
Race's isocyanates or polyfunctionality aziridine resin.
Above-mentioned anti scuffing diffusion barrier, wetting dispersing agent is added in described anti scuffing diffusion barrier main diffusion layer coating fluid,
Consumption is the 0.5%~2% of total coating fluid quality.
Above-mentioned anti scuffing diffusion barrier, the substrate layer of described water-based system scratch resistance diffusion barrier is transparent material, by poly- right
One kind in PET (PET), polymethyl methacrylate, makrolon, polyamide, polyimides is made,
It is preferred that ethylene glycol terephthalate (PET) film.
A kind of backlight module, including light source, reflector plate, light guide plate and frame, optical diffusion and prism for lighting
Piece, the optical diffusion is above-mentioned anti scuffing diffusion barrier.
The present invention is using the larger solvent of the almost nil water substitution harm of harm.
The beneficial effects of the present invention are：
(1) water-soluble resin emulsion of the invention, environmentally safe with water as decentralized medium, with obvious green
Environment protection significance；It is nonflammable non-explosive, without security against fire hidden danger.(2) convenient construction, substantially reduces to harm, without mouth
The safeguard procedures such as cover, breathing mask, without exhaust blower equal solvent processing unit.(3) big particle uses bullet in light diffusion particle
Property anti scuffing particle, solve the problems, such as existing optical diffusion when backlight module is applied to easily prism film scratch,
So as to improve the quality of product, production cost is reduced.
Specific embodiment
Transparent base in the present invention is simultaneously not particularly limited its thickness, with good surface smoothness, mechanical strength, resistance to
Warm nature and fast light, weatherability material can be used as the base material of optical diffusion, general to choose 20 μm~300 μ m thicks,
Too thin its resistance to thermal dimensional stability declines substantially, too thick, can influence the transmitance of light.To improve substrate surface and coating fluid
Adherence, transparent substrate surface can be also used in the pre- priming operation of transparent substrate surface by corona or plasma treatment,
To improve the adhesive performance of diffusion coating layer and transparent base.
In the present invention, the light diffusion particle that main diffusion coating is used by different-grain diameter size big particle and granule subgroup
Close constitute, the big particle be polybutyl methacrylate (PBMA), polyisobutyl methacrylate (PIBMA) in one kind or
Two kinds, particle diameter is 30 μm~50 μm, and big particle weight accounts for the 10%~40% of light diffusion particle total weight percent；Granule
Son is one or more in polymethyl methacrylate (PMMA), polystyrene (PS), organic silicon particle, the small particles
At 0.5 μm~30 μm, small particles weight accounts for the 60%~90% of light diffusion particle total weight percent to particle diameter distribution.
The averaged particles particle diameter that big particle is used is 30 μm~50 μm, and main diffusion layer coating layer thickness is maximum particle diameter
1/2~3/4.Big average particle size is too low, and light lineal travel is too short, and light is passed through without diffusion, the reduction of its diffusion effect；Greatly
Average particle size is too high or particle insertion is very few, is easily caused with binding resin bonded area in coating that very little, generation comes off
Etc. defect.Big particle is from the one kind in polybutyl methacrylate (PBMA), polyisobutyl methacrylate (PIBMA) simultaneously
Or two kinds of combinations of particle, big particle is soft particle, and it provides a soft contact surface for optical diffusion, so as to
It is enough effectively to prevent from scratching prism film.Simultaneously because the condenser performance of big particle can guarantee that the condenser performance of coating again.
The average grain diameter that small particles are used typically chooses 0.5 μm~30 μm, and small particles of the invention are polymethyl
One or more in sour methyl esters (PMMA), polystyrene (PS), organic silicon particle.Small particles are dispersed in water-soluble resin
Uniformity and covering when light is improve in film forming matter through film so that optical diffusion has excellent comprehensive
Energy.
In order to reach the requirement for being satisfied with mist degree higher, the small particles of main diffusion coating of the invention are with one layer or two-layer
Main diffusion layer surface closely is arranged in, big particle is spaced in small particles, to meet the high transmission needed for optical diffusion
Rate and the good harmony of haze.
Small particles weight of the invention accounts for the 60%~90% of light diffusion particle total weight percent.In this formula rate
Under, it is not in effective particle for preventing from reuniting during dim spot, and coating fluid supply that aqueous anti scuffing optical diffusion is apparent
The filtration core on liquid feeding pipeline is blocked, reduction feed flow is not smooth, often change filter core or feed flow is uneven, influence coating speed and quality
Defect.
Main diffusion coating includes that percentage by weight is 30%~80% water-soluble resin emulsion, 10%~65% in the present invention
The coating solution that light diffusion particle, 1%~10% function additive are made anchors at one surface of optics basement membrane and forms.It is water-soluble
The main composition of resin emulsion is water soluble acrylic resin；The water soluble acrylic resin is solid in water-soluble resin emulsion
Content accounting is 40%~70%.Function additive includes crosslinking agent, wetting dispersing agent.Crosslinking agent is hydrophilic aliphatic isocyanic acid
Ester or polyfunctionality aziridine crosslinker.It is the 0.5%~2% of total coating fluid quality to add wetting dispersing agent consumption.
Consider for the winding resist blocking and that and antistatic property to anti scuffing diffusion barrier, the present invention is in transparent base another side
It is provided with back coating.
The coating method of anti scuffing diffusion barrier of the invention using conventional accurate coating method, such as intaglio plate coating, micro-
Recessed coating, bar stitch the modes such as coating, dropping curtain coating to form coating.Various coating methods have its advantage and disadvantage, according to specific painting
Cloth requirement, is such as coated with fluid viscosity, rolling speed, coating layer thickness and selects suitable coating method, preferably nick coating.
With reference to specific embodiment, the present invention is further illustrated.
Embodiment 1
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 1 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to polyethylene terephthalate thin
The upper surface of the transparent substrate layer that film is made, then carries out drying and processing, finally carries out burin-in process, and aging 12 hours to 24 small
When formed diffusion barrier main diffusion layer；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 1 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the lower surface of the transparent substrate layer that pet film is made, so
After carry out drying and processing, finally carry out burin-in process, form backing layer within aging 12 hours to 24 hours；The thickness of backing layer is maximum
The 1/2~3/4 of the particle diameter of PBMA particles；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made and luminous light
Source, reflector plate, light guide plate and frame and prismatic lens constitute a kind of backlight module.
Embodiment 2
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 2 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to polymethyl methacrylate film system
Into transparent substrate layer upper surface, then carry out drying and processing, finally carry out burin-in process, aging 12 hours to 24 hours shapes
Into the main diffusion layer of diffusion barrier；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 2 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the lower surface of the transparent substrate layer that polymethyl methacrylate film is made, Ran Houjin
Row drying and processing, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；The thickness of backing layer is maximum PBMA
The 1/2~3/4 of the particle diameter of son；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made and luminous light source, reflection
Piece, light guide plate and frame and prismatic lens constitute a kind of backlight module.
Embodiment 3
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 3 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；By finely dispersed main diffusion layer coating fluid be applied to that polycarbonate film is made it is transparent
The upper surface of substrate layer, then carries out drying and processing, finally carries out burin-in process, forms diffusion barrier within aging 12 hours to 24 hours
Main diffusion layer；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 3 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the lower surface of the transparent substrate layer that polycarbonate film is made, is then carried out at drying
Reason, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；The thickness of backing layer is the particle diameter of maximum PBMA particles
1/2~3/4；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made and luminous light source, reflector plate, leaded light
Plate and frame and prismatic lens constitute a kind of backlight module.
Embodiment 4
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 4 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to the transparent base that polyamide film is made
The upper surface of material layer, then carries out drying and processing, finally carries out burin-in process, forms diffusion barrier within aging 12 hours to 24 hours
Main diffusion layer；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 4 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the lower surface of the transparent substrate layer that polyamide film is made, is then carried out at drying
Reason, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；The thickness of backing layer is the particle diameter of maximum PBMA particles
1/2~3/4；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made and luminous light source, reflector plate, leaded light
Plate and frame and prismatic lens constitute a kind of backlight module.
Embodiment 5
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 5 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to polyethylene terephthalate tree
The upper surface of the transparent substrate layer that membrane of lipoprotein is made, then carries out drying and processing, finally carries out burin-in process, and aging 12 hours extremely
The main diffusion layer for forming diffusion barrier in 24 hours；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 5 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the following table of the transparent substrate layer that pet resin film is made
Face, then carries out drying and processing, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；The thickness of backing layer is
The 1/2~3/4 of the particle diameter of maximum PBMA particles；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made with it is luminous
Light source, reflector plate, light guide plate and frame and prismatic lens constitute a kind of backlight module.
Embodiment 6
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 6 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to polyethylene terephthalate tree
The upper surface of the transparent substrate layer that membrane of lipoprotein is made, then carries out drying and processing, finally carries out burin-in process, and aging 12 hours extremely
The main diffusion layer for forming diffusion barrier in 24 hours；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 6 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the following table of the transparent substrate layer that pet resin film is made
Face, then carries out drying and processing, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；The thickness of backing layer is
The 1/2~3/4 of the particle diameter of maximum PBMA particles；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made with it is luminous
Light source, reflector plate, light guide plate and frame and prismatic lens constitute a kind of backlight module.
Embodiment 7
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 7 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to polyethylene terephthalate tree
The upper surface of the transparent substrate layer that membrane of lipoprotein is made, then carries out drying and processing, finally carries out burin-in process, and aging 12 hours extremely
The main diffusion layer for forming diffusion barrier in 24 hours；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 7 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the following table of the transparent substrate layer that pet resin film is made
Face, then carries out drying and processing, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；The thickness of backing layer is
The 1/2~3/4 of the particle diameter of maximum PBMA particles；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made with it is luminous
Light source, reflector plate, light guide plate and frame and prismatic lens constitute a kind of backlight module.
Embodiment 8
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-described embodiment 8 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；By finely dispersed main diffusion layer coating fluid be applied to that Kapton is made it is transparent
The upper surface of substrate layer, then carries out drying and processing, finally carries out burin-in process, forms diffusion barrier within aging 12 hours to 24 hours
Main diffusion layer；The thickness of main diffusion layer is the 1/2~3/4 of the particle diameter of maximum PBMA particles.
Compositing formula according to the backing layer of embodiment 8 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the lower surface of the transparent substrate layer that Kapton is made, is then carried out at drying
Reason, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；The thickness of backing layer is the particle diameter of maximum PBMA particles
1/2~3/4；Complete the preparation of anti scuffing diffusion barrier.The anti scuffing diffusion barrier being made and luminous light source, reflector plate, leaded light
Plate and frame and prismatic lens constitute a kind of backlight module.
Comparative example 1
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-mentioned comparative example 1 prepares masking liquid raw material：By the water-soluble resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to polyethylene terephthalate tree
The upper surface of the transparent substrate layer that membrane of lipoprotein is made, then carries out drying and processing, finally carries out burin-in process, and aging 12 hours extremely
The main diffusion layer for forming diffusion barrier in 24 hours.
Compositing formula according to the backing layer of comparative example 1 prepares masking liquid raw material：Water-soluble resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the following table of the transparent substrate layer that pet resin film is made
Face, then carries out drying and processing, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；Complete diffusion barrier
Prepare.The diffusion barrier being made constitutes a kind of backlight module with luminous light source, reflector plate, light guide plate and frame and prismatic lens.
Comparative example 2
The preparation of main diffusion layer coating fluid：
Backing layer coating fluid is prepared：
Compositing formula according to the main diffusion layer of above-mentioned comparative example 2 prepares masking liquid raw material：By the solvent type resin breast in formula
Liquid, diffusion particle disperse 30min to 40min in being added to dispersion machine, are subsequently adding resin cross-linking agent, dispersant 10min extremely
15min, is made main diffusion layer coating fluid；Finely dispersed main diffusion layer coating fluid is applied to polyethylene terephthalate tree
The upper surface of the transparent substrate layer that membrane of lipoprotein is made, then carries out drying and processing, finally carries out burin-in process, and aging 12 hours extremely
The main diffusion layer for forming diffusion barrier in 24 hours.
Compositing formula according to the backing layer of comparative example 2 prepares masking liquid raw material：Solvent type resin emulsion, diffusion particle are added to point
Dispersion 30min to 40min in machine is dissipated, resin cross-linking agent, dispersant 10min to 15min is subsequently adding, backing layer coating fluid is made；
Finely dispersed backing layer coating fluid is applied to the following table of the transparent substrate layer that pet resin film is made
Face, then carries out drying and processing, finally carries out burin-in process, forms backing layer within aging 12 hours to 24 hours；Complete diffusion barrier
Prepare.The diffusion barrier being made constitutes a kind of backlight module with luminous light source, reflector plate, light guide plate and frame and prismatic lens.
Test result see the table below：
Method of testing is as follows
Mist degree, light transmittance：With NDH~5000 (the electric color of Japan) light transmittance mist degree instrument, optical diffusion in measurement embodiment
Full light light transmittance and mist degree, light is from adherent layer to diffusion layer during test.
Coating adhesion is tested：Diffusion barrier layer face cutter is cut into 100 section lines, and the size of each section line is
1mmX1mm, 3M~610 type professional test adhesive tape is sticked to draw on lattice coating with the power of 2Kg, with 180 ° of angles by 3M glue after 3min
Band is quick to be peeled off from coating surface, and coating adhesion is commented according to counting the number that stays in the section lattice on base material in coat side
Estimate, be designated as " N/% ".
Anti-wear performance is tested：Diffusion barrier layer face carries out reciprocating friction with #000 steel wool, and it is 100g/cm2 to bear a heavy burden, and is rubbed
It is 5cm to wipe distance, and observation is estimated by the scuffing situation of rubbed coat side, to occur without the highest friction time of thin scuffing
Number is estimated.
Claims (8)
1. a kind of anti scuffing diffusion barrier, including transparent base, it is arranged on the main diffusion layer of transparent base upper surface and is arranged on
The anti scuffing backing layer of bright base material lower surface, it is characterised in that the coating fluid component and percentage by weight of the main diffusion layer be：
Water-soluble resin emulsion 30%~80%
Light diffusion particle 10%~65%
Function additive 1%~5%
Contain water soluble acrylic resin in the water-soluble resin emulsion, water soluble acrylic resin's weight accounts for the water
The percentage of soluble resin emulsion weight is 40%~70%, and the smooth diffusion particle is by the big particle of different-grain diameter size and small
Particle combinations constitute, the big particle be polybutyl methacrylate, polyisobutyl methacrylate in one or two, greatly
Particle diameter is 30 μm~50 μm, and big particle weight accounts for the 10%~40% of light diffusion particle total weight percent.
2. anti scuffing diffusion barrier according to claim 1, it is characterised in that the small particles are poly-methyl methacrylate
One or more in ester, polystyrene, organic silicon particle, the particle diameter distribution of the small particles 0.5 μm~30 μm, small particles
Weight accounts for the 60%~90% of light diffusion particle total weight percent, and the main diffusion layer coating layer thickness is maximum particle diameter
1/2~3/4.
3. anti scuffing diffusion barrier according to claim 2, it is characterised in that the small particles of the main diffusion layer with one layer or
Two-layer is uniformly distributed in main diffusion layer at random, and big particle is spaced in small particles.
4. anti scuffing diffusion barrier according to claim 3, it is characterised in that the function additive includes crosslinking agent, wetting
Dispersant.
5. anti scuffing diffusion barrier according to claim 4, it is characterised in that the crosslinking agent is hydrophilic aliphatic isocyanide
Acid esters or polyfunctionality aziridine resin.
6. anti scuffing diffusion barrier according to claim 5, it is characterised in that profit is added in the coating fluid of the main diffusion layer
Hygroscopic water powder, wetting dispersing agent consumption is the 0.5%~2% of total coating fluid quality.
7. anti scuffing diffusion barrier according to claim 6, it is characterised in that the transparent base, by poly terephthalic acid
One kind in glycol ester, polymethyl methacrylate, makrolon, polyamide, polyimides is made.
8. a kind of backlight module, including light source, reflector plate, light guide plate and frame, optical diffusion and prismatic lens for lighting,
Characterized in that, the optical diffusion is the anti scuffing diffusion barrier described in claim 1~7.
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| CN108319060A (en) * | 2017-12-26 | 2018-07-24 | 江西省平波电子有限公司 | A kind of highlighted liquid crystal display die set |
| CN108424691A (en) * | 2018-02-28 | 2018-08-21 | 合肥乐凯科技产业有限公司 | A kind of aqueous diffusion coating |
| CN108427153A (en) * | 2017-12-27 | 2018-08-21 | 深圳市长松科技有限公司 | A kind of optical diffusion film |
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