CN209514109U - A kind of that resist warping optical diffusion - Google Patents
A kind of that resist warping optical diffusion Download PDFInfo
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- CN209514109U CN209514109U CN201822186769.3U CN201822186769U CN209514109U CN 209514109 U CN209514109 U CN 209514109U CN 201822186769 U CN201822186769 U CN 201822186769U CN 209514109 U CN209514109 U CN 209514109U
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Abstract
The utility model relates to a kind of optical diffusion, especially a kind of that resist warping optical diffusion.In order to solve the problems, such as that existing large scale optical diffusion is easy to produce warpage in use, the utility model provides a kind of that resist warping optical diffusion.Stating that resist warping optical diffusion successively includes light diffusion layer, substrate layer, laminating layer, warp-resistant layer and antiblocking layers.The resistance to warping of that resist warping optical diffusion provided by the utility model is good, and has good resistance to environmental judgment performance.
Description
Technical field
The utility model relates to a kind of optical diffusion, especially a kind of that resist warping optical diffusion.
Background technique
Optical diffusion is widely used in the fields such as LCD backlight module displays device, advertisement background illumination, lamp box advertisement.Especially
In LCD backlight module displays device, diffusion barrier is crucial component for it.Diffusion barrier mainly uniformly changes linear light sources
For a uniform area source
The quality of optical diffusion directly affects the effect for showing picture.With the prevalence of oversize liquid crystal display
And client's energy-efficient requirement frivolous to display, optical diffusion cutter size is also increasing, and existing market is commonly used in
Optical diffusion in large size liquid crystal display uses one layer of substrate, substrate upper and lower surface coating optical diffusion layer and
Antiblocking layers, thickness are limited between 200-300 μm by thickness, itself stiffness is insufficient, client carry out environment (65 DEG C,
95% humidity) warpage is easily generated in assessment, ripple glaze is formed, and seriously affect the picture effect of display.
For the resistance to warping energy of optical diffusion, common method is to add a large amount of low-shrinkages in the coating in industry
Additive (such as polyvinyl acetate (PVAc), polymethyl methacrylate (PMMA), polystyrene (PSt)) come in certain journey
The contraction of coating or film is reduced on degree.Such as publication No. is 106556886 A of CN (date of publication is on April 5th, 2017),
It is exactly to pass through design surface in the Chinese patent application of entitled " a kind of that resist warping optical diffusion and preparation method thereof "
The formula of coating: film forming resin is made of liquid rubber and optical resin, and the mass ratio of liquid rubber and optical resin
Example control improves the resistance to warping energy of diaphragm in 1:1 to 1:9.But these external additives are to the optics of optical thin film
The influence of property and physical property is on the knees of the gods.Another patent, such as publication No. are 102928900 B of CN (date of publication 2015
On June 24), entitled " a kind of that resist warping optical thin film, preparation method and the display using the optical thin film
Identical coating can be coated on optical substrate two sides to mitigate warpage by mentioning in the Chinese patent application of part ".These schemes are equal
Warpage issues are solved from the coat of optical diffusion, but this solution is in (65 DEG C, 95% humidity) of environment assessments
Additive in coat is easy to be influenced and fail by temperature and humidity, and that resist warping effect stability is poor.
Summary of the invention
In order to solve the problems, such as that existing large scale optical diffusion is easy to produce warpage, the utility model in use
A kind of that resist warping optical diffusion is provided.The resistance to warping of that resist warping optical diffusion provided by the utility model is good, and resists and stick up
Bent stability is good, has good resistance to environmental judgment performance.
Large scale optical diffusion is often referred to the optical diffusion that Diagonal Dimension is greater than or equal to 1414.01mm.
It is as follows that the utility model solves technical solution used by above-mentioned technical problem:
The utility model provides a kind of that resist warping optical diffusion, including the diffusion of substrate layer, laminating layer, warp-resistant layer, light
Layer and antiblocking layers.
Further, that resist warping optical diffusion successively includes light diffusion layer, substrate layer, laminating layer, that resist warping
Layer and antiblocking layers.
Further, the substrate layer is polyethylene terephthalate (PET).Further, the substrate layer
With a thickness of 100 μm.
Further, warp-resistant layer is the polyethylene terephthalate (PET) of 150-300 μ m-thick.
Further, the shrinking percentage of substrate layer is 0.10%.
Further, the shrinking percentage of warp-resistant layer is 0.01-0.08%.
Further, the thickness of warp-resistant layer is greater than the thickness of substrate layer.
Further, the shrinking percentage of warp-resistant layer is less than the shrinking percentage of substrate layer.
Further, substrate layer and warp-resistant layer surface do chemical substrate (Primer) processing, for improve substrate layer with
Cohesive force between laminating layer and laminating layer and warp-resistant layer.
Further, the resin in laminating layer be selected from UV type crylic acid resin, polyurethanes, propylene polyalcohols or
One of epoxy resin, the resin solid content are 100%.
Further, the laminating layer with a thickness of 8-25 μm.
Further, the light diffusion layer with a thickness of 20-23 μm.
Further, the antiblocking layers with a thickness of 6-7 μm.
Further, the laminating layer with a thickness of 15-16 μm.Further, the warp-resistant layer with a thickness of 188-
300μm.Further, the light diffusion layer with a thickness of 21-22 μm.Preceding solution includes embodiment 9-11.
Further, the resin film forming matter in the optical diffusion layer and antiblocking layers is selected from crylic acid resin, poly- ammonia
One of esters, propylene polyalcohols or epoxy resin or at least two combination.
Further, the light diffusion particle in the optical diffusion layer (abbreviation light diffusion layer) and antiblocking layers is selected from poly- first
Base methyl acrylate (PMMA), Vinalac 5920 (PBMA), polypropylene (PP), polyethylene (PE) polyamide (PA),
One of polystyrene (PS), titanium dioxide, silica or organosilicon or at least two combination.
During the preparation process, the raw material of the optical diffusion layer is first configured to light diffusion layer coating fluid, the light diffusion layer
Coating fluid includes: acrylic resin (solid content 60%) 16.2%；Isocyanate curing agent (solid content 40%) 2.9%；
Polymethyl methacrylate light diffusion particle (PMMA, 18 μm of average grain diameter, the coefficient of dispersion 50%) 14.9%；Polymethylacrylic acid
N-butyl light diffusion particle (PBMA, 18 μm of average grain diameter, the coefficient of dispersion 40%) 5.5%；Butyl acetate 30%；Butanone 30%；
Levelling agent 0.3%；Antistatic agent 0.2%, the percentage composition are weight percentage.
During the preparation process, the raw material of the antiblocking layers is first configured to antiblocking layers coating fluid, and the antiblocking layers apply
Cloth liquid includes: acrylic resin (solid content 60%) 16.2%；Isocyanate curing agent (solid content 40%) 2.9%；It is poly-
N-BMA light diffusion particle (PBMA, 5 μm of average grain diameter, the coefficient of dispersion 50%) 3.4%；Butyl acetate 42%；
Butanone 35%；Levelling agent 0.1%；Slipping agent 0.2%；Antistatic agent 0.2%, the percentage composition are weight percentage.
The utility model provides a kind of preparation method of that resist warping diffusion barrier, includes the following steps:
(1) lower surface of first base material layer coats UV type resin (with a thickness of 10-35 μm), with warp-resistant layer upper surface in UV
Compound, condition of cure 300-600mj/cm is carried out under illumination with composite roll2；
(2) light diffusion particle and resin film forming matter are uniformly mixed, is then coated in the upper surface of first base material layer,
Aging 3mim in 100 DEG C of baking ovens obtains light diffusion layer then in 60 DEG C of curing 36h；
(3) light diffusion particle and resin film forming matter are uniformly mixed, is then coated in the lower surface of warp-resistant layer, 100
Aging 3mim in DEG C baking oven, then 60 DEG C of curings for 24 hours, obtain antiblocking layers.
Compared with prior art, that resist warping optical diffusion of the utility model is not in light diffusion layer and antiblocking layers
Auxiliary agent is added, but by increasing warp-resistant layer and guaranteeing optical diffusion by the thickness of control warp-resistant layer and shrinking percentage
Good resistance to warping energy is able to maintain in (65 DEG C, 95% humidity) of environment assessments.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of that resist warping optical diffusion provided by the utility model；
Fig. 2 is schematic diagram of that resist warping optical diffusion provided by the utility model in camber test.
Specific embodiment
It is described in further detail to the utility model with reference to embodiments
As shown in Figure 1, that resist warping optical diffusion provided by the utility model, successively include light diffusion layer 4, substrate layer 1,
Laminating layer 2, warp-resistant layer 3 and antiblocking layers 5.Light diffusion particle 6, tree are separately included in optical diffusion layer 4 and antiblocking layers 5
Rouge film forming matter 7, auxiliary agent 8.
The main performance for the optical diffusion that the utility model embodiment and comparative example provide is tested in the following manner.
1, stiffness is tested: referring to GB/T 23144-2008 " the measurement general principle of paper and cardboard static buckling stiffness ", instrument
Device model Taber 150 fixes one end of sample in swivel head when test, and device of visiting others during work hours after slipping away from one's post withstands the other end of diaphragm, so
After when testing, when swivel head rotates 15 °, keep 5s, the moment values obtained by sensor, the unit of moment values is mNm, as
The measured value of stiffness.Moment values are bigger, indicate that the stiffness of brightness enhancement film is better.
2, luminance gain is tested: using specific backlight, the brightness for testing a diffusion barrier is L0, the identical diffusion of re-test
The brightness of film+optical brightening membrane provided by the utility model is L1, then the luminance of optical brightening membrane provided by the utility model increases
Benefit is L1/L0。
3, camber test: cutting into 40 cun for optical diffusion to be measured, then in the environment of 65 DEG C, 95%RH (such as
Constant temperature and humidity experimental box) place naturally cool to room temperature after 200h, 500h, 1000h respectively, take out film 9 be placed on it is horizontal big
On fibrous gypsum platform, the height h of warpage is measured, as shown in Figure 2.
Embodiment 1
That resist warping optical diffusion provided by the utility model successively includes light diffusion layer, substrate layer, laminating layer, resists and stick up
Bent layer and antiblocking layers.Wherein,
(1) substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.
8 μm of thickness of laminating layer is obtained in substrate layer lower surface coating UV acrylic resin (100% solid content), and poly- with 150 μm
The upper surface of ethylene glycol terephthalate (PET) warp-resistant layer, in UV light intensity 300mj/cm2Compound, the warp-resistant layer of lower progress
Percent thermal shrinkage be 0.01%.
(2) by uniformly mixed light diffusion layer coating fluid, it is coated in substrate layer upper surface, obtains expanding with a thickness of 21 μm of optics
Dissipate layer.Wherein light diffusion layer coating fluid includes: acrylic resin (solid content 60%) content is 16.2%；Cured with isocyanates
Agent (solid content 40%) content is 2.9%；Polymethyl methacrylate light diffusion particle (PMMA, 18 μm of average grain diameter, dispersion
Coefficient 50%) content 14.9%；Vinalac 5920 light diffusion particle (PBMA, 18 μm of average grain diameter, the coefficient of dispersion
40%) content 5.5%；Butyl acetate content is 30%；Butanone content is 30%；Levelling agent content is 0.3%；Antistatic agent contains
Amount is 0.2%.
(3) by uniformly mixed antiblocking layers coating fluid, the lower surface coated in warp-resistant layer is obtained anti-with a thickness of 6 μm
Adhering layer.Wherein antiblocking layers coating fluid includes: acrylic resin (solid content 60%) content is 16.2%；Isocyanates is solid
Agent (solid content 40%) content is 2.9%；Vinalac 5920 light diffusion particle (PBMA, 5 μm of average grain diameter,
The coefficient of dispersion 50%) content 3.4%；Butyl acetate content is 42%；Butanone content is 35%；Levelling agent content is 0.1%；It is refreshing
Lubrication prescription content is 0.2%；Antistatic agent content is 0.2%.
Test result is shown in Table in 1.
Embodiment 2
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 11 μm of thickness of laminating layer, and poly- to benzene with 150 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 380mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.01%.It obtains expanding with a thickness of 20 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 7 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 3
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 16 μm of thickness of laminating layer, and poly- to benzene with 150 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 460mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.01%.It obtains expanding with a thickness of 21 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 6 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 4
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 21 μm of thickness of laminating layer, and poly- to benzene with 150 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 530mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.01%.23 μm of thickness of light diffusion is obtained according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
Layer and 6 μm of antiblocking layers, test result are shown in Table in 1
Embodiment 5
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 25 μm of thickness of laminating layer, and poly- to benzene with 150 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 600mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.01%.It obtains expanding with a thickness of 22 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 7 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 6
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 16 μm of thickness of laminating layer, and poly- to benzene with 150 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 460mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.03%.It obtains expanding with a thickness of 22 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 6 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 7
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 15 μm of thickness of laminating layer, and poly- to benzene with 150 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 460mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.05%.It obtains expanding with a thickness of 21 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 7 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 8
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 16 μm of thickness of laminating layer, and poly- to benzene with 150 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 460mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.08%.It obtains expanding with a thickness of 21 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 7 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 9
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 15 μm of thickness of laminating layer, and poly- to benzene with 188 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 460mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.01%.It obtains expanding with a thickness of 22 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 6 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 10
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 15 μm of thickness of laminating layer, and poly- to benzene with 250 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 460mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.01%.It obtains expanding with a thickness of 21 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 7 μm of antiblocking layers, test result is shown in Table in 1
Embodiment 11
That resist warping optical diffusion provided such as embodiment 1, wherein
Substrate layer selects to be heat-shrinked the polyethylene terephthalate (PET) for 0.10%, with a thickness of 100 μm.?
Substrate layer lower surface coating UV acrylic resin (100% contains admittedly) obtains 16 μm of thickness of laminating layer, and poly- to benzene with 300 μm
The upper surface of naphthalate (PET) warp-resistant layer, in UV light intensity 460mj/cm2Compound, the heat of warp-resistant layer of lower progress
Shrinking percentage is 0.01%.It obtains expanding with a thickness of 21 μm of light according to the coated options of the inner light diffusion layer of embodiment 1 and antiblocking layers
It dissipates layer and 7 μm of antiblocking layers, test result is shown in Table in 1
Comparative example 1
A kind of optical diffusion is provided, successively includes light diffusion layer, substrate layer and antiblocking layers.Wherein,
(1) it by uniformly mixed light diffusion layer coating fluid, is coated in a thickness of 188 μm, shrinking percentage is poly- pair of 0.10%
The upper surface of ethylene terephthalate (PET) substrate, obtains with a thickness of 21 μm of optical diffusion layers.Wherein light diffusion layer coating fluid
Include: acrylic resin (solid content 60%) content is 16.2%；Isocyanate curing agent (solid content 40%) content is
2.9%；Polymethyl methacrylate (PMMA light diffusion particle, 18 μm of average grain diameter, the coefficient of dispersion 50%) content 14.9%；It is poly-
N-BMA (PBMA light diffusion particle, 18 μm of average grain diameter, the coefficient of dispersion 40%) content 5.5%；Butyl acetate
Content is 30%；Butanone content is 30%；Levelling agent content is 0.3%；Antistatic agent content is 0.2%
(2) by uniformly mixed antiblocking layers coating fluid, coated in the polyethylene terephthalate with a thickness of 188 μm
(PET) lower surface of substrate obtains with a thickness of 7 μm of antiblocking layers.Wherein light diffusion layer coating fluid includes: acrylic resin (Gu
Body content 60%) content be 16.2%；Isocyanate curing agent (solid content 40%) content is 2.9%；Polymethylacrylic acid
N-butyl (PBMA light diffusion particle, 5 μm of average grain diameter, the coefficient of dispersion 50%) content 3.4%；Butyl acetate content is 42%；
Butanone content is 35%；Levelling agent content is 0.1%；Smooth agent content is 0.2%；Antistatic agent content is 0.2%.Test knot
Fruit sees in 1
The optical diffusion that comparative example 1 provides does not include warp-resistant layer.
Comparative example 2
It, will according to the coated options of the inner light diffusion layer of comparative example 1 and antiblocking layers such as the optical diffusion that comparative example 1 provides
It, which is distributed, is coated in a thickness of 250 μm, the upper surface of polyethylene terephthalate (PET) substrate that shrinking percentage is 0.10%
And lower surface, it respectively obtains with a thickness of 22 μm of light diffusion layer and 6 μm of antiblocking layers, test result is shown in Table in 1
Comparative example 3
It is distributed and is coated in a thickness of 300 μm according to the coated options of the inner light diffusion layer of comparative example 1 and antiblocking layers, received
The upper and lower surfaces of polyethylene terephthalate (PET) substrate that shrinkage is 0.10%, respectively obtain with a thickness of 22 μ
The light diffusion layer of m and 6 μm of antiblocking layers, test result are shown in Table in 1
The performance test results for the optical diffusion that table 1 embodiment 1-11 and comparative example 1-3 are provided
It can be seen that that resist warping stability of (embodiment 1 to embodiment 5) optical diffusion with patch from the data in table 1
It closes and increases after being reduced under the increase of thickness, this influence is smaller；From embodiment 6 to embodiment 8 as can be seen that the contraction of warp-resistant layer
Rate is larger to that resist warping stability influence of optical diffusion；From embodiment 9 to embodiment 11 it can be seen that warp-resistant layer thickness
Also there is large effect to optical diffusion that resist warping stability.That resist warping optical diffusion of the utility model is than traditional light
Diffusion barrier was evaluated and tested in ring mirror (65 DEG C, 95% humidity) and has excellent stability energy (embodiment 1 and comparative example 2, embodiment
9 and comparative example 3), can be applied to oversize backlight module.Wherein, embodiment 9-11 has better resistance to warping and ring mirror
(65 DEG C, 95% humidity) evaluation and test stability.
The above, the only preferred embodiment of the utility model, are not intended to limit the protection of the utility model
Range.All equivalent changes and modifications done according to the content of the present invention, are encompassed by the scope of the patents of the utility model
It is interior.
Claims (4)
1. a kind of that resist warping optical diffusion, which is characterized in that that resist warping optical diffusion successively includes light diffusion layer, base
Material layer, laminating layer, warp-resistant layer and antiblocking layers；Warp-resistant layer is the polyethylene terephthalate of 150-300 μ m-thick
Layer, the shrinking percentage of warp-resistant layer are 0.01-0.08%, and the thickness of warp-resistant layer is greater than the thickness of substrate layer, the contraction of substrate layer
Rate is 0.10%；The laminating layer with a thickness of 8-25 μm；The light diffusion layer with a thickness of 20-23 μm.
2. that resist warping optical diffusion according to claim 1, which is characterized in that the warp-resistant layer with a thickness of 188-
300 μm, the laminating layer with a thickness of 15-16 μm, the light diffusion layer with a thickness of 21-22 μm.
3. that resist warping optical diffusion according to claim 1, which is characterized in that the substrate layer with a thickness of 100 μm.
4. that resist warping optical diffusion according to claim 1, which is characterized in that the antiblocking layers with a thickness of 6-7 μ
m。
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| CN201822186769.3U CN209514109U (en) | 2018-12-25 | 2018-12-25 | A kind of that resist warping optical diffusion |
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