CN106125172A - A kind of diffusion barrier and preparation method thereof - Google Patents
A kind of diffusion barrier and preparation method thereof Download PDFInfo
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- CN106125172A CN106125172A CN201610651996.1A CN201610651996A CN106125172A CN 106125172 A CN106125172 A CN 106125172A CN 201610651996 A CN201610651996 A CN 201610651996A CN 106125172 A CN106125172 A CN 106125172A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
Abstract
The invention provides a kind of diffusion barrier and preparation method thereof.This diffusion barrier includes: substrate layer, has relative first surface and second surface；Two-layer diffusion layer, is respectively provided with over the first and second surface；Being provided with tissue adhesion layer at least one of which diffusion layer in two-layer diffusion layer, tissue adhesion layer is arranged on the surface away from substrate layer of diffusion layer, and the particle diameter of the tissue adhesion particle in tissue adhesion layer is between 50～100nm.Using particle diameter is nano level tissue adhesion particle, and by its size controlling between 50～100nm, it is surprised to find that, this tissue adhesion particle makes diffusion barrier on the premise of keeping preferable tissue adhesion performance, make the refractive index refractive index less than substrate layer of diffusion barrier face coat simultaneously, thus effectively reduce the light scattering on surface, and then it is effectively increased the light transmittance of the diffusion barrier of the application, and there is the briliancy of the optics of this diffusion barrier.
Description
Technical field
The present invention relates to field of optical films, in particular to a kind of diffusion barrier and preparation method thereof.
Background technology
Optical diffusion membrane (abbreviation diffusion barrier) is widely used in the optical device such as liquid crystal display, illuminating lamp, particularly
In liquid crystal indicator, diffusion barrier is the key components and parts in backlight module, it is possible to use diffusion barrier promotes light luminance, and
The soft dispersion of light received by light guide plate, provides a uniform area source for display, thus plays the effect expanding visual angle.
The purpose of diffusion barrier is that linear light sorurce or point source of light are uniformly converted into area source, and its action principle is to utilize light
Passing in the medium have different refractivity, light produces the phenomenon that many reflects, reflects, scatters, and forms optics diffusion
Effect.During additionally, prepare diffusion barrier, in order to avoid the adhesion of diffusion barrier during unwinding and rewinding, typically also need to arrange tissue adhesion
Layer.
At present, the method preparing diffusion barrier typically has extrusion molding and rubbing method.Application No. 201310478682.2 China
Public announcement of a patent application uses extrusion molding to prepare the technical scheme of diffusion barrier, and its diffusion barrier is by diffusion layer, supporting layer and tissue adhesion
Layer composition, diffusion layer is covered in the upper surface of support, and tissue adhesion layer is covered in the lower surface of supporting layer, and supporting layer is PET, diffusion
Layer is made up of PET, antistatic additive, glass microballoon, and tissue adhesion layer is made up of PET, silicon dioxide granule and antistatic additive.During preparation
The coextrusion glassy state slab that obtains is carried out, then, by this glass after diffusion masterbatch, tissue adhesion masterbatch and PET section fusion plastification
Glass state slab carries out cross directional stretch and longitudinal stretching.Additionally, the Chinese patent application of Application No. 201210027668.6 is open
A kind of method using rubbing method to prepare diffusion barrier, little granule scattering particles and polyester slice are mixed to form scattering mother by it
Material, is then mixed to form scattering masterbatch and polyester slice compound A, then carries out coextrusion by compound A and substrate material B
Form polyester base film with biaxial tension, will then have the coating fluid that bulky grain scattering particles, binder resin and diluent are formed
Being coated on polyester base film and obtain diffusion barrier after drying, wherein, coating fluid component includes: polymethyl methacrylate (PMMA) grain
Son, polystyrene (PS) particle, acrylic resin, isopropanol and butanol.
But, all there is respective defect in above two mode.Wherein, although the cost of diffusion barrier that obtains of extrusion molding relatively
Low, but the existence of glass microballoon therein and silicon dioxide granule can be substantially reduced its light transmittance and briliancy, greatly limits
Its application；And the diffusion barrier that rubbing method obtains is due to many one courses of processing, cost relatively extrusion type is high；And its curing
Generally heat cure and UV solidification, wherein heat cure cost is relatively low, but the most substantial amounts of organic solvent needs volatilization, to human body and
Environment all can damage；Another kind solidifies for UV, it is also possible to work the mischief practitioner.
Summary of the invention
Present invention is primarily targeted at a kind of diffusion barrier of offer and preparation method thereof, to solve diffusion barrier in prior art
The problem that can not simultaneously have enhanced blocking resistance, light transmittance and briliancy.
To achieve these goals, according to an aspect of the invention, it is provided a kind of diffusion barrier, including: substrate layer, tool
There are relative first surface and second surface；Two-layer diffusion layer, is respectively provided with over the first and second surface；Two-layer spreads
Being provided with tissue adhesion layer at least one of which diffusion layer in Ceng, tissue adhesion layer is arranged on the surface away from substrate layer of diffusion layer
On, and the particle diameter of the tissue adhesion particle in tissue adhesion layer is between 50～100nm.
Further, the one during above-mentioned tissue adhesion particle is silicon dioxide granule, acrylic particle and aluminium sesquioxide
Or it is multiple.
Further, the tissue adhesion coating fluid forming above-mentioned tissue adhesion layer includes with weight percent gauge: 10～15%
Water-base resin, preferably water-base resin are water-borne acrylic resin or waterborne polyurethane resin；0.1～0.2% tissue adhesion particle；Excellent
0.02～0.08% wetting agent of choosing；Preferred 0.05～0.15% amine nertralizer, preferred amines nertralizer is 2-amino-2-first
Base-1-propanol, ammonia and/or diethanolamine；And the water of surplus.
Further, the thickness of two-layer above-mentioned tissue adhesion layer is identical or different, and all between 50～100nm, the most anti-
The volume of adhesion particle accounts for the 2～5% of the dry film volume of tissue adhesion layer.
Further, the diffusion masterbatch forming above-mentioned diffusion layer includes that matrix and scattering particles, diffusion masterbatch contain weight
Content is the scattering particles of 10～20%, the particle diameter of scattering particles be 0.8～5 μm, preferably scattering particles be refractive index be 1.4～
The scattering particles of 1.75, further preferred scattering particles is polymethyl methacrylate particle, polystyrene particle, polyester granules
With one or more in Merlon particle；Preferred substrate is polyethylene terephthalate, poly terephthalic acid fourth two
In alcohol ester and PEN one or more.
Further, the thickness of the above-mentioned diffusion layer of two-layer identical or different and～6 μm between.
Further, above-mentioned substrate layer is pet layer.
According to a further aspect in the invention, it is provided that the manufacture method of a kind of above-mentioned diffusion barrier, this manufacture method includes: step
Rapid S1, uses co-extrusion platen press to form substrate layer and the sheet of two-layer diffusion layer with diffusion barrier；Step S2, carries out by sheet
One-off drawing, obtains stretching film；Step S3, at least one side of stretching film, coating forms the tissue adhesion of diffusion barrier
The tissue adhesion coating fluid of layer, obtains wet coating diaphragm；And step S4, wet coating diaphragm is carried out second time and stretches, and in second time
Drawing process is dried solidification and obtains diffusion barrier.
Further, above-mentioned steps S2 includes: after being preheated 5～15 seconds at 70～135 DEG C by sheet, obtain hot sheet；
Make the farinfrared heating that hot sheet enters 135～155 DEG C, and carry out longitudinal stretching with the stretching ratio of 3.0～3.5,2～
Under conditions of 20～30 DEG C, carry out lax cooling after 3s, obtain stretching film.
Further, above-mentioned steps S4 includes: depend on after wet coating diaphragm is carried out cross directional stretch with the stretching ratio of 3.5～4
Secondary shape at 210～230 DEG C 5～8 seconds, at 45～160 DEG C lax 10～15 seconds, obtain diffusion barrier.
Application technical scheme, using particle diameter is nano level tissue adhesion particle, and by its size controlling 50
～between 100nm, it has unexpectedly been found that, this tissue adhesion particle make diffusion barrier on the premise of keeping preferable tissue adhesion performance, simultaneously
Make the refractive index refractive index less than substrate layer of diffusion barrier face coat, thus effectively reduce the light scattering on surface, and then
It is effectively increased the light transmittance of the diffusion barrier of the application, and there is the briliancy of the optics of this diffusion barrier.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of the diffusion barrier provided according to a preferred embodiment of the present invention.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
10, substrate layer；20, diffusion layer；30, tissue adhesion layer.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As described in background technology, in order to realize tissue adhesion effect in prior art, at the tissue adhesion layer 30 of diffusion barrier
Middle incorporation silicon dioxide granule, but there is the light transmittance causing diffusion barrier and briliancy reduction, in order to solve this in silicon dioxide
Problem, the application one typically embodiments, provides a kind of diffusion barrier, and this diffusion barrier includes that substrate layer 10, two-layer spread
Layer 20 and one layer or two-layer tissue adhesion layer 30, substrate layer 10 has relative first surface and second surface；Two-layer diffusion layer 20
It is respectively provided with over the first and second surface；It is provided with tissue adhesion layer at least one of which diffusion layer in two-layer diffusion layer
30, tissue adhesion layer 30 is arranged on the surface away from substrate layer 10 of diffusion layer, and the tissue adhesion particle in tissue adhesion layer 30
Particle diameter is between 50～100nm.
The application uses particle diameter to be nano level tissue adhesion particle, and by its size controlling between 50～100nm, unexpected
Ground finds, this tissue adhesion particle makes diffusion barrier on the premise of keeping preferable tissue adhesion performance, makes diffusion barrier surface be coated with simultaneously
The refractive index of layer is less than the refractive index of substrate layer, thus effectively reduces the light scattering on surface, and then is effectively increased the application
The light transmittance of diffusion barrier, and there is the briliancy of the optics of this diffusion barrier.
Due to the application tissue adhesion particle size controlling in the preferred range, therefore keeping enhanced blocking resistance
Impact on light is less simultaneously, and the tissue adhesion particle of the application can be in silicon dioxide, acrylic particle and aluminium sesquioxide
One or more, wherein, the effect of silicon dioxide is best.
Owing to the number of plies of the diffusion barrier of the application is more, for the ease of making, the application preferably employs the mode shape of coating
Becoming tissue adhesion layer 30, wherein, the tissue adhesion coating fluid forming this tissue adhesion layer 30 includes with weight percent gauge: 10～15%
Water-base resin, 0.1～0.2% tissue adhesion particle, preferred 0.02～0.08% wetting agent, preferred 0.05～0.15% are in amine
Mediating recipe and the water of surplus, preferably water-base resin are water-borne acrylic resin or waterborne polyurethane resin；Preferably wetting agent is104BC (aerochemistry),Wet505 (enlightening high) orOT-75(Cytec)；In preferred amines
Mediating recipe is 2-amino-2-methyl-1-propanol, ammonia or diethanolamine.Organic solvent-free in above-mentioned tissue adhesion coating fluid, therefore becomes
This is low and more environmentally-friendly.
The thickness of the two-layer tissue adhesion layer 30 of the application is identical or different, the most all between 50～100nm, it is achieved in consumption
Preferable tissue adhesion effect is realized on the premise of taking alap raw material.Additionally, in order to realize preferable tissue adhesion effect
On the basis of, reduce the impact on light of the tissue adhesion particle, the preferably volume of tissue adhesion particle as far as possible and account for the dry film of tissue adhesion layer 30
The 2～5% of volume.
During additionally, the relation that present inventor is between light diffusion effect and the scattering particles to diffusion layer is studied
Find, the size of scattering particles and the refractive index obvious effect to diffusion effect, be therefore preferably formed as diffusion layer
Diffusion masterbatch includes that matrix and scattering particles, diffusion masterbatch contain the scattering particles that weight content is 10～20%, scattering particles
Particle diameter be 0.8～5 μm, further preferred scattering particles be refractive index be the scattering particles of 1.4～1.75.Scattered by control
The particle diameter of particle, effectively alleviates the scattering particles negative bridging effect to light.On this basis, grain is further preferably scattered
Son is in polymethyl methacrylate particle (PMMA particle), polystyrene particle, polyester granules and Merlon particle
Plant or multiple.Meanwhile, can be used for the matrix material that the matrix of the application diffusion layer can use the application to commonly use, such as poly-to benzene
In naphthalate (PET), polybutylene terephthalate (PBT) and PEN one or more.
Additionally, the thickness of the diffusion layer of the application can also be with reference to prior art, the thickness of the application preferred two-layer diffusion layer
Spend identical or different and between 3～6 μm, to realize the effect that the haze height of more than 95% covers.
Further, the material forming the application substrate layer 10 can also be for conventional material of the prior art, the application
It is pet layer for the ease of operation, reduction cost preferred substrates layer 10.
By foregoing description, the substrate layer 10 of the application and diffusion layer all do not contain the tissue adhesion grains such as silicon dioxide
Son, only arranges tissue adhesion particle in tissue adhesion layer 30, while solving tissue adhesion so that diffusion barrier has haze, height
The premium properties of light transmittance.
In the another kind of typical embodiment of the application, it is provided that the manufacture method of a kind of above-mentioned diffusion barrier, this making
Method includes: step S1, uses co-extrusion platen press to form substrate layer and the sheet of two-layer diffusion layer with diffusion barrier；Step S2,
Carry out sheet stretching for the first time, obtain stretching film；Step S3, at least one side of stretching film, coating is formed and expands
Dissipate the tissue adhesion coating fluid of the tissue adhesion layer of film, obtain wet coating diaphragm；And step S4, wet coating diaphragm is carried out second time and draws
Stretch, and in second time drawing process, be dried solidification obtain diffusion barrier.
The diffusion barrier of the application is while having above-mentioned advantage, in manufacturing process, uses co-extrusion platen press to define tool
There is the sheet of substrate layer and diffusion layer, therefore reduce the cost of manufacture of diffusion barrier；Meanwhile, the tissue adhesion coating fluid used is
Aqueous solution, does not therefore have the volatilization of organic solvent, more environmentally-friendly；Further, twice stretching is separately carried out, and second time is drawn
Stretch and carry out after tissue adhesion coating solution, therefore, be conducive to the high temperature utilizing drawing process to promote in tissue adhesion coating fluid
The volatilization of water.
Include to obtain preferable drawing effect, preferably above-mentioned steps S2: sheet is preheated at 70～135 DEG C 5～
After 15 seconds, obtain hot sheet；Make the farinfrared heating that hot sheet enters 135～155 DEG C, and with the stretching times of 3.0～3.5
Rate carries out longitudinal stretching, carries out lax cooling, obtain stretching film after 2～3s under conditions of 20～30 DEG C.By obtained
Sheet first preheats at a lower temperature, can prevent sheet from quickly raising generation face fold and concave point because of temperature；Then profit
Heat with far infrared, sheet can be made to reach softening point, to carry out Uniform Tension, thus base material in the stretching film obtained
The thickness of layer and diffusion layer is the most uniform with composition.
Further, it is preferable to above-mentioned steps S4 includes: wet coating diaphragm is carried out cross directional stretch with the stretching ratio of 3.5～4
After sequentially pass through and shape at 210～230 DEG C 5～8 seconds, at 45～160 DEG C lax 10～15 seconds, obtain diffusion barrier.Above-mentioned fixed
Under the temperature conditions of type, may advantageously facilitate the volatilization of water in tissue adhesion coating fluid.
In above-mentioned steps S1, the co-extrusion platen press that this area can be used conventional forms sheet, preferably will dissipate containing the application
The diffusion masterbatch of radion joins in auxiliary extruder after mixing homogeneously according to proportioning with polymer chips, with formation substrate layer
PET section is melted in being respectively fed to main extruder, auxiliary extruder (two), extrudes through co-extrusion die head, and melt passes through Electrostatic Absorption
Device, forms the sheet of three-decker on Quench drum.Wherein, the mass ratio of diffusion masterbatch and polymer chips be 0.1～
0.3:1, polymer chips therein can be identical with the basic material in diffusion masterbatch.
Below with reference to embodiment and comparative example, further illustrate the beneficial effect of the application.
The silicon dioxide granule used in following embodiment and comparative example is as tissue adhesion particle, wherein, uses dioxy
The silica dispersions that SiClx weight content is 40% provides silicon dioxide；PMMA particle is as scattering particles, silicon dioxide
The particle diameter of particle and the particle diameter of PMMA particle are shown in Table 1.
Embodiment 1
After diffusion masterbatch (composition is shown in Table 2) containing PMMA particle is mixed homogeneously according to the proportioning in table 2 with PET section
Joining in two auxiliary extruders, main extruder is sent in PET section, melted in main extruder and auxiliary extruder the most respectively,
Extruding through co-extrusion die head, melt passes through electrostatic adsorption device, forms the sheet of three-decker on Quench drum；
The sheet bloated from Quench, carries out the preheating of 10 seconds through the pre-hot-rolling groups of 120 DEG C, enters back into 145 DEG C remote
Infrared heating and complete the longitudinal stretching of sheet under the effect downloading draw roll, stretching ratio be after 3.2,4 seconds
Carry out lax cooling under conditions of 20～30 DEG C, obtain stretching film.
Stretching film cooled lax after enter coating machine, use the tissue adhesion coating that bar blade coating mode will prepare in advance
Liquid is applied to the two sides of stretching film, carries out 3.8 times of stretchings subsequently into regions of lateral stretch, and utilizing during cross directional stretch should
The hot blast of process is dried solidification, after through 220 DEG C of thermal finalizations 6 seconds, and then carry out lax cooling 12 seconds, system at 120 DEG C
Obtaining the diffusion barrier of embodiment 1, wherein, the composition of tissue adhesion coating fluid is shown in Table 2.
Embodiment 2
Two are joined after being mixed homogeneously according to the proportioning in table 2 with pure PET section by diffusion masterbatch containing PMMA particle
In the auxiliary extruder of platform, main extruder is sent in PET section, melted, through coextruding die in main extruder and auxiliary extruder the most respectively
Head extrusion, melt passes through electrostatic adsorption device, forms the sheet of three-decker on Quench drum；
The sheet bloated from Quench, carries out the preheating of 15 seconds through the pre-hot-rolling groups of 70 DEG C, enters back into 135 DEG C the reddest
Outside line district heats, and completes the longitudinal stretching of sheet under the effect downloading draw roll, and stretching ratio is 20 after 3.5,5 seconds
～under conditions of 30 DEG C, carry out lax cooling, obtain stretching film.
Stretching film cooled lax after enter coating machine, use the tissue adhesion coating that bar blade coating mode will prepare in advance
Liquid is applied to the two sides of stretching film, carries out 3.5 times of stretchings subsequently into regions of lateral stretch, and utilizing during cross directional stretch should
The hot blast of process is dried solidification, after through 210 DEG C of thermal finalizations 8 seconds, and then carry out lax cooling 10 seconds, system at 160 DEG C
Obtaining the diffusion barrier of embodiment 2, wherein, the composition of tissue adhesion coating fluid is shown in Table 2.
Embodiment 3
Two are joined after being mixed homogeneously according to the proportioning in table 2 with pure PET section by diffusion masterbatch containing PMMA particle
In the auxiliary extruder of platform, main extruder is sent in PET section, melted, through coextruding die in main extruder and auxiliary extruder the most respectively
Head extrusion, melt passes through electrostatic adsorption device, forms the sheet of three-decker on Quench drum；
The sheet bloated from Quench, carries out the preheating of 5 seconds through the pre-hot-rolling groups of 135 DEG C, enters back into 145 DEG C the reddest
Outside line district heats, and completes the longitudinal stretching of sheet under the effect downloading draw roll, and stretching ratio is 20 after 3.0,2 seconds
～under conditions of 30 DEG C, carry out lax cooling, obtain stretching film.
Stretching film cooled lax after enter coating machine, use the tissue adhesion coating that bar blade coating mode will prepare in advance
Liquid is applied to the two sides of stretching film, carries out 4.0 times of stretchings subsequently into regions of lateral stretch, and utilizing during cross directional stretch should
The hot blast of process is dried solidification, after through 230 DEG C of thermal finalizations 5 seconds, and then carry out lax cooling 12 seconds at 45 DEG C, prepare
The diffusion barrier of embodiment 3, wherein, the composition of tissue adhesion coating fluid is shown in Table 2.
Embodiment 4
Two are joined after being mixed homogeneously according to the proportioning in table 2 with pure PET section by diffusion masterbatch containing PMMA particle
In the auxiliary extruder of platform, main extruder is sent in PET section, melted, through coextruding die in main extruder and auxiliary extruder the most respectively
Head extrusion, melt passes through electrostatic adsorption device, forms the sheet of three-decker on Quench drum；
The sheet bloated from Quench, carries out the preheating of 10 seconds through the pre-hot-rolling groups of 120 DEG C, enters back into 145 DEG C remote
Infrared heats, and completes the longitudinal stretching of sheet under the effect downloading draw roll, after stretching ratio is 3.2,10 seconds
Under conditions of 20～30 DEG C, carry out lax cooling, obtain stretching film.
Stretching film cooled lax after enter coating machine, use the tissue adhesion coating that bar blade coating mode will prepare in advance
Liquid is applied to the two sides of stretching film, carries out 3.2 times of stretchings subsequently into regions of lateral stretch, and utilizing during cross directional stretch should
The hot blast of process is dried solidification, after through 220 DEG C of thermal finalizations 6 seconds, and then carry out lax cooling 12 seconds, system at 120 DEG C
Obtaining the diffusion barrier of embodiment 4, wherein, the composition of tissue adhesion coating fluid is shown in Table 2.
Embodiment 5 to 12
Manufacture method is same as in Example 1, and wherein, the diffusion masterbatch containing PMMA particle is cut into slices according in table 2 with pure PET
Proportioning mix, the composition of tissue adhesion coating fluid is shown in Table 2.
Comparative example 1 to 2
Manufacture method is same as in Example 1, and wherein, the diffusion masterbatch containing PMMA particle is cut into slices according in table 2 with pure PET
Proportioning mix, the composition of tissue adhesion coating fluid is shown in Table 2.
To embodiment 1 to 12 and the light transmittance of comparative example 1 to 2, mist degree and tissue adhesion performance according to ASTMD1003 standard gauge
Fixed method detects, and testing result is shown in Table 2.
Table 1
Table 2
Tissue adhesion performance is graded by the following method:
●: it is easily peeled, and the vestige of non-overlapping residual；Zero: be easily peeled, there is the vestige of residual；△ is not easily stripped.Wherein ●
For qualified, zero and △ is defective.
By the Data Comparison of embodiment in table 21 to 9 and comparative example 1 and 2 it can be seen that work as and use particle diameter 50～100nm
Between silicon dioxide granule as tissue adhesion particle time, light transmittance has clear improvement, and illustrates to utilize the diffusion barrier energy of the application
Enough improve the briliancy of device, and tissue adhesion performance is preferable.Additionally, through the control to manufacturing conditions, obtain certain limit thick
The diffusion layer of degree, also is able to improve light transmittance and the mist degree of diffusion barrier to a certain extent.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
The application uses particle diameter to be nano level tissue adhesion particle, and by its size controlling between 50～100nm, unexpected
Ground finds, this tissue adhesion particle makes diffusion barrier on the premise of keeping preferable tissue adhesion performance, makes tissue adhesion particle pair simultaneously
The impact of light substantially reduces, and then is effectively increased the light transmittance of the diffusion barrier of the application, and has the optics device of this diffusion barrier
The briliancy of part.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a diffusion barrier, it is characterised in that including:
Substrate layer (10), has relative first surface and second surface；
Two-layer diffusion layer (20), is separately positioned on described first surface and described second surface；
Being provided with tissue adhesion layer (30) at least one of which diffusion layer in described two-layer diffusion layer, described tissue adhesion layer (30) is arranged
On the surface away from described substrate layer (10) of described diffusion layer, and the grain of the tissue adhesion particle in described tissue adhesion layer (30)
Footpath is between 50～100nm.
Diffusion barrier the most according to claim 1, it is characterised in that described tissue adhesion particle is silicon dioxide granule, Ya Ke
One or more in power particle and aluminium sesquioxide.
Diffusion barrier the most according to claim 2, it is characterised in that form the tissue adhesion coating fluid of described tissue adhesion layer (30)
Including with weight percent gauge:
10～15% water-base resin, the most described water-base resin is water-borne acrylic resin or waterborne polyurethane resin；
Tissue adhesion particle described in 0.1～0.2%；
Preferred 0.02～0.08% wetting agent；
Preferred 0.05～0.15% amine nertralizer, the most described amine nertralizer be 2-amino-2-methyl-1-propanol, ammonia and/
Or diethanolamine；And
The water of surplus.
4. according to the diffusion barrier described in Claims 2 or 3, it is characterised in that described in two-layer, the thickness of tissue adhesion layer (30) is identical
Or different, and all between 50～100nm, the volume of the most described tissue adhesion particle accounts for the dry film volume of described tissue adhesion layer
2～5%.
Diffusion barrier the most according to claim 1, it is characterised in that formed the diffusion masterbatch of described diffusion layer include matrix and
Scattering particles, described diffusion masterbatch contains the described scattering particles that weight content is 10～20%, the particle diameter of described scattering particles
Be 0.8～5 μm, the most described scattering particles be refractive index be the scattering particles of 1.4～1.75, further preferred described scattering grain
Son is one or more in polymethyl methacrylate particle, polystyrene particle, polyester granules and Merlon particle；Excellent
Selecting described matrix is in polyethylene terephthalate, polybutylene terephthalate (PBT) and PEN one
Plant or multiple.
Diffusion barrier the most according to claim 1, it is characterised in that the thickness of diffusion layer described in two-layer identical or different and
Between 3～6 μm.
Diffusion barrier the most according to claim 1, it is characterised in that described substrate layer (10) is pet layer.
8. the manufacture method of the diffusion barrier according to any one of claim 1 to 7, it is characterised in that described manufacture method includes:
Step S1, uses co-extrusion platen press to form substrate layer and the sheet of two-layer diffusion layer with described diffusion barrier；
Step S2, carries out described sheet stretching for the first time, obtains stretching film；
Step S3, at least one side of described stretching film, coating forms the tissue adhesion of the tissue adhesion layer of described diffusion barrier
Coating fluid, obtains wet coating diaphragm；And
Step S4, carries out described wet coating diaphragm second time and stretches, and be dried solidification in described second time drawing process
Obtain described diffusion barrier.
Manufacture method the most according to claim 8, it is characterised in that described step S2 includes:
After being preheated 5～15 seconds at 70～135 DEG C by described sheet, obtain hot sheet；
Make the farinfrared heating that described hot sheet enters 135～155 DEG C, and carry out longitudinal direction with the stretching ratio of 3.0～3.5
Stretching, carries out lax cooling under conditions of 20～30 DEG C, obtains described stretching film after 2～3s.
Manufacture method the most according to claim 8, it is characterised in that described step S4 includes:
Sequentially pass through after described wet coating diaphragm is carried out cross directional stretch with the stretching ratio of 3.5～4 at 210～230 DEG C shape 5～
8 seconds, at 45～160 DEG C lax 10～15 seconds, obtain described diffusion barrier.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132600A (en) * | 2017-06-27 | 2017-09-05 | 宁波长阳科技股份有限公司 | A kind of extrusion type diffusion barrier and preparation method thereof |
| CN107239168A (en) * | 2017-06-06 | 2017-10-10 | 浙江捷博智能科技有限公司 | A kind of electronic password lock touch panel assembly technology |
| CN108202518A (en) * | 2016-12-20 | 2018-06-26 | 新科光电材料股份有限公司 | Sputter polyester laminate and its manufacturing method |
| CN108790338A (en) * | 2018-05-23 | 2018-11-13 | 营口康辉石化有限公司 | Polyester film and preparation method thereof |
| CN110181922A (en) * | 2019-06-12 | 2019-08-30 | 浙江强盟实业股份有限公司 | A kind of high high fog diffusion barrier and preparation method thereof thoroughly of one-pass molding |
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| CN111993737A (en) * | 2019-05-27 | 2020-11-27 | 宁波长阳科技股份有限公司 | High-transmittance high-fog optical pre-coating film and preparation method thereof |
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| CN113504591A (en) * | 2021-07-08 | 2021-10-15 | 江西盛汇光学科技协同创新有限公司 | Diffusion brightening composite optical membrane and preparation method thereof |
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| CN108202518A (en) * | 2016-12-20 | 2018-06-26 | 新科光电材料股份有限公司 | Sputter polyester laminate and its manufacturing method |
| CN107239168A (en) * | 2017-06-06 | 2017-10-10 | 浙江捷博智能科技有限公司 | A kind of electronic password lock touch panel assembly technology |
| CN107239168B (en) * | 2017-06-06 | 2020-07-28 | 浙江捷博智能科技有限公司 | Assembly process of touch panel of electronic coded lock |
| CN107132600A (en) * | 2017-06-27 | 2017-09-05 | 宁波长阳科技股份有限公司 | A kind of extrusion type diffusion barrier and preparation method thereof |
| CN108790338A (en) * | 2018-05-23 | 2018-11-13 | 营口康辉石化有限公司 | Polyester film and preparation method thereof |
| CN112689554A (en) * | 2018-09-14 | 2021-04-20 | Ａｇｃ株式会社 | Method for producing pellet, and ion exchange membrane |
| CN111993737A (en) * | 2019-05-27 | 2020-11-27 | 宁波长阳科技股份有限公司 | High-transmittance high-fog optical pre-coating film and preparation method thereof |
| CN110181922A (en) * | 2019-06-12 | 2019-08-30 | 浙江强盟实业股份有限公司 | A kind of high high fog diffusion barrier and preparation method thereof thoroughly of one-pass molding |
| CN111443403A (en) * | 2020-04-06 | 2020-07-24 | 杭州和顺科技股份有限公司 | Diffusion type dual-waveband absorption light filter film |
| CN111443403B (en) * | 2020-04-06 | 2023-10-10 | 杭州和顺科技股份有限公司 | Diffusion type dual-band absorption filter film |
| CN113504591A (en) * | 2021-07-08 | 2021-10-15 | 江西盛汇光学科技协同创新有限公司 | Diffusion brightening composite optical membrane and preparation method thereof |
| CN113504591B (en) * | 2021-07-08 | 2023-03-21 | 江西盛汇光学科技协同创新有限公司 | Diffusion brightening composite optical membrane and preparation method thereof |
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