CN115284513B - Light conversion film for simplifying barrier film - Google Patents
Light conversion film for simplifying barrier film Download PDFInfo
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- CN115284513B CN115284513B CN202211229325.8A CN202211229325A CN115284513B CN 115284513 B CN115284513 B CN 115284513B CN 202211229325 A CN202211229325 A CN 202211229325A CN 115284513 B CN115284513 B CN 115284513B
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- 230000004888 barrier function Effects 0.000 title claims abstract description 148
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 57
- 239000000463 material Substances 0.000 claims abstract description 72
- 229920001577 copolymer Polymers 0.000 claims abstract description 33
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 26
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 26
- 238000002360 preparation method Methods 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 16
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 13
- 238000005096 rolling process Methods 0.000 claims abstract description 11
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- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 3
- 238000007747 plating Methods 0.000 claims abstract description 3
- 239000010408 film Substances 0.000 claims description 169
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 25
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims description 24
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 21
- 239000002131 composite material Substances 0.000 claims description 18
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 11
- 239000010409 thin film Substances 0.000 claims description 10
- 238000010345 tape casting Methods 0.000 claims description 9
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical class [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000002096 quantum dot Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 17
- 239000010410 layer Substances 0.000 description 32
- 238000002834 transmittance Methods 0.000 description 12
- 238000001914 filtration Methods 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 9
- 239000012788 optical film Substances 0.000 description 9
- 238000001228 spectrum Methods 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 238000005424 photoluminescence Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 4
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- -1 Pentaerythritol ester Chemical class 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/71—Resistive to light or to UV
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
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Abstract
The invention belongs to the technical field of light conversion films, and particularly relates to a light conversion film for simplifying a barrier film and a preparation method thereof 2 Antioxidant, white oil, other additives, barrier layer comprising Al 2 O 3 And SiO x The film stack is made of a material with high and low refractive indexes; the preparation method comprises the following steps: (1) preparation of a barrier film: barrier copolymer material, photoluminescent material, tiO 2 Stirring and mixing the hindered phenol antioxidant, the white oil and other additives, melting, pulling, cooling, cutting, casting and rolling to obtain a barrier film; (2) preparation of light conversion film: and plating a barrier layer on the upper surface of the barrier film, and attaching a film stack on the lower surface of the barrier film to obtain the light conversion film. The light conversion film is convenient to prepare, and has good optical performance and barrier performance.
Description
Technical Field
The invention belongs to the technical field of light conversion films, and particularly relates to a light conversion film for simplifying a barrier film.
Background
The light conversion film belongs to a functional optical film, at present, the light conversion film is generally made of a PET/PEN/PA base material into a barrier film, the barrier film is coated with a barrier material, and then a photosensitive material is coated on the barrier film.
Therefore, manufacturers selectively laminate three base materials of PET, PEN and PA to form the barrier film so as to improve the stiffness of the optical film and maintain the barrier rate of the optical film, and the Water Vapor Transmission Rate (WVTR) of the prepared optical film can reach 1.5g/m 2 Day, oxygen transmission rate (Oxygen Permeability, OTR) of up to 0.3[ 2 ], [ cc/(m) 2 ·d·atm）]And then using the prepared optical film for manufacturing a display product, wherein at least 5 optical films are generally stacked, but the method is complicated to prepare, and the prepared optical film has barrier properties and optical propertiesThe performance is poor.
Disclosure of Invention
The invention aims to provide a light conversion film for simplifying a barrier film, so that the light conversion film is convenient to prepare and has better optical performance and barrier performance.
A light conversion film of a simplified barrier film comprises a barrier film and a barrier layer plated on the upper surface of the barrier film, wherein a film stack is attached to the lower surface of the barrier film,
the barrier film comprises a barrier copolymer material, a photoluminescent material and TiO 2 An antioxidant, white oil and other additives,
the barrier layer comprises Al 2 O 3 And SiO x ，
The thin film stack is made of a material with high and low refractive indexes.
Preferably, the barrier copolymer material comprises CBC and EVOH, the antioxidant is hindered phenol antioxidant, and other additives comprise SiO 2 。
By adopting the technical scheme, the EVOH is an ethylene-vinyl alcohol copolymer, the CBC is a ring-shaped block copolymer, the existing barrier material comprises PVDC, NY and aluminum foil, compared with the existing barrier material, the EVOH has good light transmission, has extremely low oxygen transmission rate, and is more suitable for being applied to quantum dot materials and display optical materials; the barrier property and weather resistance of the CBC are similar to those of PET, PEN and PA, but the CBC has high light transmittance, ultraviolet light resistance, high ultraviolet light transmittance, low water absorption and high fluidity, and the density of the CBC is lower than that of the existing optical material.
Preferably, the photoluminescent material comprises at least one of cadmium selenide quantum dots and phosphor.
Preferably, the cadmium selenide quantum dots are cadmium selenide quantum dot powder.
By adopting the technical scheme, the photoluminescent material is easily coated by CBC and EVOH, and the optical properties of the CBC and EVOH are easily improved; the barrier film comprises TiO 2 Can effectively regulate and control the light transmittance and the haze of the barrier film and can regulate and control TiO 2 The concentration of the compound improves the luminous efficiency of the photoluminescence material, and further improves the optical performance of the light conversion film prepared by the invention.
Preferably, the thin film stack is composed of the high-refractive-index material stack and the low-refractive-index material stack, the high-refractive-index material stack comprises a high-refractive-index material and a low-refractive-index material, and the high-refractive-index material is TiO 2 The low refractive index material is SiO 2 。
By adopting the technical scheme, the TiO 2 Refractive index n =2.35, sio 2 N =1.46.
Another object of the present invention is to provide a method for manufacturing a light conversion film of a simplified barrier film, comprising the following steps:
(1) Preparing the barrier film:
mixing and grinding the CBC and the EVOH to obtain a barrier copolymer material, uniformly mixing the photoluminescent material and the barrier copolymer material to obtain a mixture A, and mixing the mixture A, tiO 2 Sequentially stirring and mixing the hindered phenol antioxidant, the white oil and other additives, melting, pulling, cooling and cutting to obtain a composite copolymer, and casting and rolling the composite copolymer to obtain a barrier film;
by adopting the technical scheme, the CBC and the EVOH cooperate to form a first protective layer, namely the oxygen isolation layer and the TiO, in the barrier film 2 Can improve the optical efficiency of the barrier film after tape casting and rolling, tiO 2 And other additives can also improve the light efficiency of the barrier film after cast rolling.
(2) Preparing the light conversion film:
and (2) plating the barrier layer on the upper surface of the barrier film prepared in the step (1) by a surface coating method, and attaching the film stack to the lower surface of the barrier film to obtain the light conversion film.
By adopting the technical scheme, the blocking layer enables the surface of the blocking film to form a second protective layer, namely a water vapor blocking layer, the thin film stack enables the surface of the blocking film to form a stray light filtering layer, the stray light filtering layer can filter out stray light generated by the photoluminescence material, and the stray light is light with an undesired waveband; in addition, the preparation method is convenient and fast to prepare, the integration speed of the optical film of the display backlight module can be increased, the superposition or lamination of multiple layers of optical substrates is reduced, and the reduction of light transmittance and the increase of cost are avoided.
Preferably, in the preparation of the barrier film in the step (1), the CBC and the EVOH are mixed and ground to 0.5mm, the mass ratio of the CBC to the EVOH is 1:0.056 to 1, 0.12, the mixture A and the TiO 2 The mass ratio of (1) to (1) is 1.1-0.5, the hindered phenol antioxidant accounts for 1.5% of the mass of the composite copolymer, and the white oil accounts for 0.2% of the mass of the composite copolymer.
Preferably, in the preparation of the barrier film in the step (1), the mixture A, tiO is prepared 2 Sequentially putting the hindered phenol antioxidant, the white oil and other additives into a stirrer, stirring and mixing for 20-25min at the speed of 800-1000r/min, after mixing, putting into a granulator at the temperature of 190-220 ℃, melting, drawing, cooling and cutting through the granulator to obtain a composite copolymer, and performing tape casting and rolling on the composite copolymer through a casting machine to obtain a film-shaped barrier film, wherein the film thickness of the barrier film is 30-60 mu m.
Preferably, in the preparation of the light conversion film in the step (2), the thickness of the barrier layer is 0.1 μm.
The beneficial effects of the invention are:
firstly, compared with the existing barrier material, the EVOH has good light transmission, and the EVOH has extremely low oxygen transmission rate, so that the barrier film is more suitable for quantum dot materials and display optical materials; the barrier property and weather resistance of the CBC are similar to those of PET, PEN and PA, but the CBC has high light transmittance, ultraviolet light resistance, high ultraviolet light transmittance, low water absorption and high fluidity, and the density of the CBC is lower than that of the existing optical material; and the CBC and the EVOH cooperate to form a first protective layer, namely an oxygen isolating layer, inside the isolating film;
second, the barrier film of the present invention includes a photoluminescent material and TiO 2 The photoluminescent material is easily coated by CBC and EVOH, and the optical properties of the CBC and EVOH are easily improved; tiO 2 2 Can effectively regulate and control the light transmittance and the haze of the barrier film and can regulate and control TiO 2 Concentration-enhancing light ofLuminous efficiency of the photoluminescent material, tiO 2 The optical efficiency of the barrier film after the curtain coating and rolling can be improved by the synergistic effect of the barrier film and other additives;
thirdly, the invention comprises a blocking layer and a film stack, wherein the blocking layer enables the surface of the blocking film to form a second protective layer, namely a water vapor blocking layer, the film stack enables the surface of the blocking film to form a stray light filtering layer, and the stray light filtering layer can filter out stray light generated by the photoluminescence material;
fourthly, the barrier film is simple and convenient in preparation mode, so that the barrier film is convenient and fast to prepare, the integration speed of the optical film of the display backlight module at the later stage can be increased, the overlapping or the laminating of multilayer optical substrates is reduced, and the reduction of the light transmittance is avoided;
the light conversion film is convenient to prepare under the combined action of the four points, and has good optical performance and barrier performance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic view of the overall structure of a light conversion film of comparative example 1 of the present invention;
fig. 2 is a schematic view of the overall structure of a light conversion film of comparative example 2 of the present invention;
FIG. 3 is a schematic view showing the overall structure of a light conversion film of comparative example 3 of the present invention;
FIG. 4 is a schematic view of the overall structure of a light conversion film prepared according to the present invention;
FIG. 5 is a schematic spectrum diagram of a light conversion film prepared according to the present invention;
labeled as: 1. a first barrier layer; 2. a first barrier film; 3. a second barrier film; 4. a barrier film III; 5. a second barrier layer; 6. barrier film four; 7. a film stack; 8. an incident light spectrum; 9. a photoluminescence material spectrum; 10. thin film stack spectroscopy.
Detailed Description
Example 1
Referring to fig. 5, a light conversion film of a simplified barrier film, having the composition shown in table 1 below:
TABLE 1
As shown in fig. 4, the barrier layer of the present embodiment is a second barrier layer 5, the barrier film is a fourth barrier film 6, and the film stack is a film stack 7;
a preparation method of the light conversion film of the simplified barrier film comprises the following preparation steps:
(1) Preparation of the barrier film:
referring to Table 1 above, CBC and EVOH were mixed and ground to 0.5mm to obtain a barrier copolymer material, the photoluminescent material and the barrier copolymer material were mixed uniformly to obtain a mixture A, and the mixture A, tiO was mixed 2 Sequentially putting the hindered phenol antioxidant, the white oil and other additives into a stirrer to be stirred and mixed at the speed of 800r/min for 25min, putting the mixture into a 220 ℃ granulator after the mixing is finished, melting, drawing, cooling and cutting the mixture through the granulator to obtain a composite copolymer, and carrying out tape casting and rolling on the composite copolymer through a tape casting machine to obtain a film-shaped barrier film, wherein the film thickness of the barrier film is 32 micrometers; wherein the hindered phenol antioxidant comprises an antioxidant compound and N, N' -1,6-hexylene-di- [3,5-di-tert-butyl-4-hydroxy-phenylacrylamide, and the antioxidant compound is tetra- [ beta- (3,5-di-tert-butyl-4-hydroxy-phenyl) propionic acid]Pentaerythritol ester and tris (2,4-di-tert-butylphenyl) phosphite, the CBC type being Takaray (CBC series/1325, taiwan, china) and the EVOH type being Kuraray (EVAL series/L171B, japan).
(2) Preparation of the light conversion film:
referring to table 1 above, the upper surface of the barrier film prepared in step (1) was coated with a barrier layer by a surface coating method, and a film stack was attached to the lower surface of the barrier film to obtain a light conversion film, wherein TiO in the film stack 2 Is a high refractive index material, with a refractive index n =2.35 2 Is a low-refractive index material, has a refractive index n =1.46, and the thin film stack enables the surface of the barrier film to form a stray light filtering layerThe light filtering layer can filter out stray light generated by the photoluminescence materials.
Example 2
Referring to fig. 5, a light conversion film of a simplified barrier film, having a composition as shown in table 2 below:
TABLE 2
As shown in fig. 4, the barrier layer of the present embodiment is a second barrier layer 5, the barrier film is a fourth barrier film 6, and the film stack is a film stack 7;
a preparation method of the light conversion film for simplifying the barrier film comprises the following preparation steps:
(1) Preparation of the barrier film:
referring to Table 2 above, CBC and EVOH were mixed and ground to 0.5mm to obtain a barrier copolymer material, the photoluminescent material and the barrier copolymer material were mixed uniformly to obtain a mixture A, and the mixture A, tiO was mixed 2 Sequentially putting the hindered phenol antioxidant and the white oil into a stirrer to stir and mix for 20min at the speed of 1000r/min, putting into a granulator at the temperature of 190 ℃ after mixing is finished, melting, drawing, cooling and cutting through the granulator to obtain a composite copolymer, and carrying out tape casting and rolling on the composite copolymer through a tape casting machine to obtain a film-shaped barrier film, wherein the film thickness of the barrier film is 56 mu m; wherein the hindered phenol antioxidant comprises an antioxidant compound and N, N' -1,6-hexylene-di- [3,5-di-tert-butyl-4-hydroxy-phenylacrylamide, and the antioxidant compound is tetra- [ beta- (3,5-di-tert-butyl-4-hydroxy-phenyl) propionic acid]Pentaerythritol esters and tris (2,4-di-tert-butylphenyl) phosphite, the CBC type being Taiwan corporation (CBC series/1325 brand, taiwan, china), the EVOH type being Kuraray corporation (EVAL series/L171B brand, japan).
(2) Preparation of the light conversion film:
referring to the above table 2, the upper surface of the barrier film prepared in step (1) was coated with a barrier layer by a surface coating method, and a film stack was attached to the lower surface of the barrier film to obtain a light conversion film, wherein TiO in the film stack 2 Is a high refractive index material, with refractive index n =2.35 2 The film stack enables the surface of the barrier film to form a stray light filtering layer, and the stray light filtering layer can filter out stray light generated by the photoluminescence materials.
Example 3
Referring to fig. 5, a light conversion film of a simplified barrier film, having the composition shown in table 3 below:
TABLE 3
As shown in fig. 4, the barrier layer of the present embodiment is a second barrier layer 5, the barrier film is a fourth barrier film 6, and the film stack is a film stack 7;
a preparation method of the light conversion film of the simplified barrier film comprises the following preparation steps:
(1) Preparation of the barrier film:
referring to Table 3 above, CBC and EVOH were mixed and ground to 0.5mm to obtain a barrier copolymer material, the photoluminescent material and the barrier copolymer material were mixed uniformly to obtain a mixture A, and the mixture A, tiO was mixed 2 Sequentially putting the hindered phenol antioxidant and the white oil into a stirrer to stir and mix for 22min at the speed of 910r/min, putting into a 200 ℃ granulator after mixing is finished, melting, drawing, cooling and cutting through the granulator to obtain a composite copolymer, and carrying out tape casting and rolling on the composite copolymer through a tape casting machine to obtain a film-shaped barrier film, wherein the film thickness of the barrier film is 50 microns; wherein the hindered phenol antioxidant comprises an antioxidant compound and N, N' -1,6-hexylene-di- [3,5-di-tert-butyl-4-hydroxy-phenylacrylamide, and the antioxidant compound is tetra- [ beta- (3,5-di-tert-butyl-4-hydroxy-phenyl) propionic acid]Pentaerythritol esters and tris (2,4-di-tert-butylphenyl) phosphite, the CBC type being Taiwan corporation (CBC series/1325 brand, taiwan, china), the EVOH type being Kuraray corporation (EVAL series/L171B brand, japan).
(2) Preparation of the light conversion film:
referring to the above Table 3, by surface platingCoating a barrier layer on the upper surface of the barrier film prepared in the step (1) by a film method, attaching a film stack on the lower surface of the barrier film to obtain the light conversion film, wherein TiO in the film stack 2 Is a high refractive index material, with refractive index n =2.35 2 The film stack enables the surface of the barrier film to form a stray light filtering layer, and the stray light filtering layer can filter out stray light generated by the photoluminescence materials.
As shown in fig. 1-4, a commercially available light conversion film of example 1~3 was used as a comparative example 1~3 to prepare a sample for testing, and the barrier properties were characterized by the barrier coefficient, while comparative example 1~3 has a structure shown in table 4~5, and the test results are shown in table 6 below:
TABLE 4
As shown in fig. 1-3, the light conversion film of comparative example 1~3 includes a barrier film and a barrier layer plated on an upper surface of the barrier film;
TABLE 5
TABLE 6
Taking the embodiment 1~3 and the existing light conversion film on the market as the comparative example 4~6 to prepare a sample, and representing the optical performance by using the light transmittance; the samples were all 300 μm. + -. 20 μm thick, the light transmittance was measured according to ASTM D1003 standard, the model number of the light conversion film of comparative example 4~6 is shown in the following Table 7, and the results are shown in the following Table 8:
TABLE 7
TABLE 8
Referring to fig. 5, the spectrum of the incident light of the present invention is an incident light spectrum 8, the incident light is white light, the blue light part in the white light passes through the thin film stack and excites the photoluminescent material in the barrier film to generate energy of more than two longer wavelength bands, and the spectrum of the photoluminescent material and the spectrum of the thin film stack are respectively a photoluminescent material spectrum 9 and a thin film stack spectrum 10 in fig. 5; by combining the detection results of the above tables 6 and 8, the water vapor barrier coefficient of the light conversion film prepared by the present invention can reach 1/114 of the water vapor barrier coefficient of the existing light conversion film on the market, the oxygen barrier coefficient of the light conversion film prepared by the present invention can reach 1/14 of the oxygen barrier coefficient of the existing light conversion film on the market, and the light transmittance of the light conversion film of the present invention can be increased by 8% compared with the light transmittance of the existing light conversion film on the market; the light conversion film prepared by the invention is convenient to prepare, and has better optical performance and barrier performance.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A light conversion film for simplifying a barrier film comprises the barrier film and a barrier layer plated on the upper surface of the barrier film, and is characterized in that a film stack is attached to the lower surface of the barrier film,
the barrier film comprises a barrier copolymer material, a photoluminescent material and TiO 2 Antioxidant, white oil, other additives,
the barrier copolymer material includes CBC and EVOH, among othersThe additive comprises SiO 2 The antioxidant is hindered phenol antioxidant,
the barrier layer comprises Al 2 O 3 And SiO x ，
The thin film stack is composed of a high-refractive-index material stack and a low-refractive-index material stack, the high-refractive-index material stack comprises a high-refractive-index material and a low-refractive-index material, and the high-refractive-index material is TiO 2 The low refractive index material is SiO 2 ；
The preparation of the light conversion film comprises the following steps:
(1) Preparing the barrier film:
mixing and grinding the CBC and the EVOH to obtain a barrier copolymer material, uniformly mixing the photoluminescent material and the barrier copolymer material to obtain a mixture A, and mixing the mixture A, tiO 2 Sequentially stirring and mixing the hindered phenol antioxidant, the white oil and other additives, melting, pulling, cooling and cutting to obtain a composite copolymer, and casting and rolling the composite copolymer to obtain a barrier film;
(2) Preparing the light conversion film:
plating the barrier layer on the upper surface of the barrier film prepared in the step (1), and attaching the thin film stack on the lower surface of the barrier film to obtain a light conversion film;
wherein, in the preparation of the barrier film in the step (1), the CBC and the EVOH are mixed and ground to 0.5mm, the mass ratio of the CBC to the EVOH is 1:0.056 to 1, 0.12, mixture A and the TiO 2 The mass ratio of (1) to (1) is 1.1-0.5, the hindered phenol antioxidant accounts for 1.5% of the mass of the composite copolymer, and the white oil accounts for 0.2% of the mass of the composite copolymer.
2. The light conversion film of the simplified barrier film of claim 1, wherein the photoluminescent material comprises at least one of cadmium selenide quantum dots and phosphor.
3. The light conversion film of the simplified barrier film of claim 2, wherein the cadmium selenide quantum dots are cadmium selenide quantum dot powder.
4. The light conversion film of simplified barrier film of claim 1, wherein in the preparation of the barrier film of step (1), mixture A, tiO is prepared 2 Sequentially putting the hindered phenol antioxidant, the white oil and other additives into a stirrer, stirring and mixing for 20-25min at the speed of 800-1000r/min, after mixing, putting into a granulator at the temperature of 190-220 ℃, melting, drawing, cooling and cutting through the granulator to obtain a composite copolymer, and performing tape casting and rolling on the composite copolymer through a casting machine to obtain a film-shaped barrier film, wherein the film thickness of the barrier film is 30-60 mu m.
5. The light conversion film of the simplified barrier film as described in claim 1, wherein in the step (2) of preparing the light conversion film, the thickness of the barrier layer is 0.1 μm.
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| CN202211229325.8A CN115284513B (en) | 2022-10-09 | 2022-10-09 | Light conversion film for simplifying barrier film |
| PCT/CN2022/133359 WO2024077717A1 (en) | 2022-10-09 | 2022-11-22 | Light conversion film with simplified barrier film and preparation method therefor |
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Denomination of invention: A Simplified Barrier Film for Light Conversion Granted publication date: 20230103 Pledgee: Bank of China Limited by Share Ltd. Nantong economic and Technological Development Zone sub branch Pledgor: Wanxing intelligent (Nantong) Technology Co.,Ltd. Registration number: Y2024980008486 |