CN107264002A - The preparation method and product of high-performance separation film - Google Patents
The preparation method and product of high-performance separation film Download PDFInfo
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- CN107264002A CN107264002A CN201710678445.9A CN201710678445A CN107264002A CN 107264002 A CN107264002 A CN 107264002A CN 201710678445 A CN201710678445 A CN 201710678445A CN 107264002 A CN107264002 A CN 107264002A
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
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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
- B32B38/00—Ancillary operations in connection with laminating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
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Abstract
The invention discloses a kind of preparation method of high-performance separation film and product, its preparation method comprises the following steps：1) it is packed for barrier film by more than 2 to fit by bonding glue, after solidification, obtains compound substrate membranes；2) in step 1) compound substrate membranes on be coated with one layer of heat cure glue, and baking and curing adds one layer of priming coat on the basis of compound substrate membranes；3) the another side coating of compound substrate membranes includes the glue method of diffusion particle, or laser beam marking, or UV glue impressing, carries out coarse processing to compound substrate membranes glue surface, compound substrate membranes is had rough layer；Obtain high-performance barrier basement membrane.High-performance separation film prepared by the present invention is made up of matte layer, composite base film layer, priming coat, high with rejection rate, and thickness of thin, the low advantage of production cost can be directly used for the preparation of various types of quantum dot films.
Description
Technical field
The invention belongs to the processing and manufacturing field of Obstruct membrane, and in particular to a kind of preparation method of high-performance separation film and production
Product.
Background technology
Quantum dot film coordinates blue-light source to use, and can effectively improve the color gamut value of display element.Due to quantum dot material
Material is sensitive to water oxygen, it is easy to needed when decaying, therefore diaphragm is made using the encapsulation of water oxygen Obstruct membrane, it is to avoid quanta point material with
The direct contact of air, improves the stability and service life during quantum dot film use.
At present, the thickness of quantum dot film, at 300-360 μm, can will show NTSC of the color gamut value from 70% or so on the market
1931 standards bring up to 100% or so the standards of NTSC 1931, but the quantum dot film of this thickness be only applicable to it is large-sized
TV is shown.For the application of the quantum dot film of small-medium size, diaphragm thickness can be strict between 75-200 μm, and it is therein
Quanta point material layer determines that its optimum thickness should be in 50-125 μm, practical application if the thickness degree often subtracts because of its principle of luminosity
Few 25 μm, the luminescent properties of quanta point material will decline more than 20%.Therefore, it is adaptable to the quantum dot film institute that small and medium-sized screen is shown
The thickness requirement of the water oxygen Obstruct membrane of use is controlled below 80 μm, is shown for mobile phone, it is desirable to which its thickness is below 30 μm.
Water oxygen Obstruct membrane applied to quantum dot film is, it is necessary to meet claimed below：(1) it is the stabilization of guarantee quantum dot film
Property, Obstruct membrane water vapor transmittance should be less than 0.08g/m2·day；(2) in order that resistance film easily fit with quantum dot layer, Obstruct membrane and
Quantum dot resin contact surface surface tension is more than 46 dynes；(3) in order to prevent quantum dot film in the application with other optical film groups
Water ripples influence outward appearance is produced during conjunction, Obstruct membrane and quantum dot resin noncontact face needs are coarse, and its mist degree should be in 5-70%；
(4) light transmittance is more than 85%.Due to the rigors of quantum dot Obstruct membrane, current its preparation method mainly using vacuum evaporation or
Magnetron sputtering technique.The technique one side cost is high, causes every square metre of price of its finished product to be up to more than 7 U.S. dollars；On the other hand,
The thickness of the Obstruct membrane of the technique productions volume production is higher than 75 μm, current because technology problem can not also below the thickness
Volume production.
Current quantum dot water oxygen Obstruct membrane has that thickness is larger, and production cost is higher, it is difficult to the defect of industrialization, thus grinds
The application for studying carefully new high-performance separation film for quantum dot film is particularly important.
The content of the invention
It is an object of the invention to provide a kind of cost is low, thickness of thin, can industrialization production high-performance separation film preparation
Method and product.
The preparation method for this high-performance separation film that the present invention is provided, comprises the following steps：
1) will at least two be packed for barrier film by bond glue fit, after solidification, obtain compound substrate membranes；
2) in step 1) obtained one layer of heat cure primary coat glue of compound substrate membranes coated on one side, after baking and curing, had
There are the compound substrate membranes of priming coat；
3) in step 2) the obtained another side of the compound substrate membranes with priming coat is by using in following three method
Any one carries out rough surface processing：
First method：It is coated with one layer of glue containing diffusion particle；
Second method：One layer of UV solidified glue of coating simultaneously carries out UV glue impressings；
The third method：One layer of heat cure glue of coating simultaneously carries out laser beam marking；
Make compound substrate membranes that there is rough layer.
The step 1) in be packed for barrier film for PET Obstruct membranes, PC Obstruct membranes, the multi-layer co-extruded Obstruct membranes of EVOH,
One or more in the multi-layer co-extruded Obstruct membrane of nylon.
The step 1) in bonding glue be methacrylic resin class UV solidified glues, polyurethanes heat-curable glue
One kind in water, pressure sensitive adhesive.
The step 2) midsole cementing is polyurethanes heat cure glue, crylic acid resin heat cure glue, pressure-sensitive
One kind in glue.
The step 3) in the glue containing diffusion particle be the polyurethane containing organic silicon particle or polymer microsphere
Class heat cure glue；The glue that UV glue impressing is used is methacrylic resin UV photocuring glue；What laser beam marking was used
Glue is one kind in polyurethanes heat cure glue, crylic acid resin heat cure glue, pressure sensitive adhesive.
The step 2) in solidification after priming coat thickness be 2-10 μm；Base coating surface tension force >=46 dyne.
The step 3) in coating diffusion particle method rough layer thickness be 2-15 μm.
The step 3) in UV glue stamped methods impressing depth of lines≤10 μm.
The step 3) in laser beam marking method laser ablation depth of lines be 1-8 μm.
High-performance separation film is prepared according to the preparation method of above-mentioned high-performance separation film.
High-performance separation film prepared by the present invention mainly using being packed for water oxygen Obstruct membrane as base material, by 2 layers or
Lamination coating is prepared into compound substrate membranes, improves its rejection rate；Then by carrying out primary coat to compound substrate membranes, its surface is improved
Power, makes it easily be fitted with quantum dot layer；Then rough surface processing is carried out by the another side to compound substrate membranes, prevents quantum dot
Film in the application with other combination of optical films when produce water ripples influence；The preparation that it can be made to be directly used in quantum dot film.
The beneficial effects of the invention are as follows：It is packed for water oxygen Obstruct membrane and typically uses casting technique, this process is simple,
Production cost is low, and the film of preparation is most thin to can reach 5 μm.But it is packed for Obstruct membrane water vapor transmittance, surface tension and surface
The requirement of quantum dot Obstruct membrane can not be met in the performances such as roughness, thus is not directly applicable the preparation of quantum dot film.This
Invention, by the preparation technology of the present invention, allows its direct using water oxygen barrier thin film thickness, the low advantage of cost is packed for
For the preparation of quantum dot film, and the thickness and production cost of quantum dot Obstruct membrane can be effectively reduced, and realize its industry
Metaplasia is produced.
Brief description of the drawings
Fig. 1 is the structural representation of high-performance separation film of the present invention；
Fig. 2 is the preparation flow figure of embodiment 1；
Fig. 3 is the preparation flow figure of embodiment 2；
Fig. 4 is the preparation flow figure of embodiment 3；
Fig. 5 is that quantum dot film is made of Obstruct membrane using composite barrier film of the present invention and business quantum dot film, in 85 DEG C of temperature
Luminous intensity attenuation curve under degree, 85% relative humidities.
Embodiment
Unless otherwise indicated, the number in following embodiments and comparative example refers to mass parts, and the spreading rod used is
U.S.'s RDS bars.
The structure of the high-performance separation film of the present invention is as shown in figure 1, it is divided into matte layer, composite base film layer, primary coat
Layer；Wherein composite base film layer is made up of multi-layer packaging with Obstruct membrane and glue layer.
Embodiment 1
Using the Mitsubishi PET Obstruct membranes being packed for, its thickness is 12 μm, water vapor transmittance 0.08g/m2Day, thoroughly
Light rate 95%, is divided into two layers, respectively PET base material layer and oxidation aluminium coat.
The present embodiment preparation flow figure is as shown in Fig. 2 its specific implementation step is as follows：
By the oxidation aluminium coat of PET Obstruct membranes, tiling is on the glass substrate, solid with adhesive tape in the middle of corner and four sides up
It is fixed, it is coated with a floor solid content with No. 2 bars and is 100% methacrylic resin UV solidified glues, and another PET resistance of fitting
Barrier film, it aoxidizes aluminium coat up, then uses 800mJ/cm2UV energy is solidified, and it is 27 μm of composite base film layers to obtain thickness.
The polyurethane thermoset glue that quality solid content is 50% is scratched with No. 3 bars in the oxidation aluminium coat face of compound substrate membranes
Water, and solidify drying in 80 DEG C of air dry ovens, priming coat is obtained, about 3 μm of its thickness.
The poly- ammonia for being 40% with No. 5 solid contents of the bar coating comprising organosilicon diffusion particle in the another side of compound substrate membranes
Ester heat cure glue, the evaporation drying in 80 DEG C of air dry ovens produces organic silicon particle rough layer, and its thickness is 5 μm.
Prepared high-performance separation film gross thickness is 35 μm, and light transmittance is 93%, and mat surface mist degree is 50%, non-rough
Face surface tension is 52 dynes, under the conditions of 60 DEG C, 90%RH, uses Mocon methods to test water vapor transmittance for 0.06g/m2·
day。
Embodiment 2
Using being packed for toray PC Obstruct membranes, 30 μm of its thickness, water vapor transmittance 0.06g/m2.day, light transmittance
92%, it is divided into two layers, is PC substrate layers and silicon oxide layer.
The present embodiment preparation flow figure is as shown in figure 3, its specific implementation step is as follows：
By PC Obstruct membranes silicon oxide layer, tiling on the glass substrate, is fixed, with 5 in the middle of corner and four sides with adhesive tape up
Number bar is coated with after the organic solvent in the polyurethane thermoset tensol that a floor quality solid content is 50%, heating evaporation glue,
Another PC Obstruct membrane of laminating, its PC substrate layer up, is dried at 60 DEG C, and it is 66 μm of composite base film layers to obtain thickness.
It is 50% polyacrylic acid heat cure glue to scratch quality solid content with No. 2 bars in the one side of compound substrate membranes, and
Solidify drying in 60 DEG C of air dry ovens, obtain priming coat, its thickness is 2 μm.
It is 80% acrylic resin UV solidified glues to be coated with solid content with No. 3 bars in the another side of compound substrate membranes, and
UV impressings are carried out, impressing rough layer is produced, glue layer thickness is 5 μm, and depth of indentation is 3 μm.
Prepared high-performance separation film gross thickness is 73 μm, and light transmittance is 91%, and the mist degree of mat surface is 45%, primary coat
Face surface tension is 57 dynes, under the conditions of 60 DEG C, 90%RH, uses Mocon methods to test water vapor transmittance for 0.04g/m2·
day。
Embodiment 3
Use and be packed for Mitsubishi EVOH barrier film thicknesses for 45 μm, water vapor transmittance 0.05g/m2.day, light transmittance
91%.
The present embodiment preparation flow figure is as shown in figure 4, its specific implementation step is as follows：
By the tiling of EVOH Obstruct membranes on the glass substrate, fixed in the middle of corner and four sides with adhesive tape, one is coated with No. 3 bars
The methacrylic resin UV solidified glues that layer quality solid content is 80%, and another EVOH Obstruct membrane of fitting, then again with 3
Number bar is coated with the methacrylic resin UV solidified glues that a floor quality solid content is 100%, in the 3rd EVOH resistance of laminating
Barrier film, then with then using 1000mJ/cm2UV energy solidified, obtain thickness for 145 μm of composite base film layers.
The polyurethane thermoset tensol for being 30% in one side No. 10 line rod blade coating quality solid content of compound substrate membranes, and
Solidify drying in 90 DEG C of air dry ovens, obtain priming coat, about 7 μm of its thickness.
Solid content is coated with No. 5 bars in the another side of compound substrate membranes and is 50% polyurethane glue, and carry out laser incising
Print, produces marking rough layer, and glue layer thickness is 6um, and etching depth degree is 3 μm.
Prepared high-performance separation film gross thickness is 155 μm, and light transmittance is 88%, and mist degree is 55%, non-rough face table
Face tension force is 60 dynes, under the conditions of 60 DEG C, 90%RH, uses Mocon methods to test water vapor transmittance for 0.02g/m2.day。
Embodiment 4
Using the PC Obstruct membranes in PET Obstruct membranes and embodiment 2 in the embodiment 1 being packed for.
By the oxidation aluminium coat of PET Obstruct membranes, tiling is on the glass substrate, solid with adhesive tape in the middle of corner and four sides up
It is fixed, a floor pressure sensitive adhesive, and a PC Obstruct membrane of fitting are coated with No. 4 bars, its silicon oxide layer is face-up, then in 80 DEG C of air blast
Solidify drying in drying box, it is 51 μm of composite base film layers to obtain thickness.
It is 40% acrylic resin thermosetting to scratch quality solid content with No. 11 bars in the silica aspect of compound substrate membranes
Tensol, and solidify drying in 90 DEG C of air dry ovens, priming coat is obtained, about 10 μm of its thickness.
The poly- ammonia that the solid content for including polymer microsphere in another side No. 10 line rod coating of compound substrate membranes is 30%
Ester heat cure glue, the evaporation drying in 80 DEG C of air dry ovens produces organic silicon particle rough layer, and its thickness is 7 μm.
High-performance separation film gross thickness prepared by the present embodiment is 68 μm, and light transmittance is 92%, and the mist degree of mat surface is
40%, non-rough face surface tension be 50 dynes, under the conditions of 60 DEG C, 90%RH, use Mocon methods test water vapor transmittance for
0.05g/m2·day。
Embodiment 5
Using the EVOH Obstruct membranes in PET Obstruct membranes and embodiment 3 in the embodiment 1 being packed for.
By the oxidation aluminium coat of PET Obstruct membranes, tiling is on the glass substrate, solid with adhesive tape in the middle of corner and four sides up
It is fixed, the polyurethane glue that a floor solid content is 50% is coated with No. 2 bars, after organic solvent evaporation in glue, is fitted one
EVOH Obstruct membranes, the then baking and curing at 90 DEG C, it is 59 μm of composite base film layers to obtain thickness.
It is 40% acrylic resin heat cure to scratch quality solid content with No. 5 bars in the silica aspect of compound substrate membranes
Glue, and solidify drying in 70 DEG C of air dry ovens, priming coat is obtained, about 5 μm of its thickness.
It is 90% methacrylic resin UV solidification glues to be coated with solid content with No. 5 bars in the another side of compound substrate membranes
Water, after after organic solvent evaporation in glue, carries out UV impressings, produces impressing rough layer, and glue layer thickness is 10 μm, depth of indentation
For 8 μm.
High-performance separation film gross thickness prepared by the present embodiment is 74 μm, and light transmittance is 90%, and the mist degree of mat surface is
43%, non-rough face surface tension be 53 dynes, under the conditions of 60 DEG C, 90%RH, use Mocon methods test water vapor transmittance for
0.04g/m2·day。
Embodiment 6
High-performance separation film is obtained using embodiment 1 and prepares quantum dot film.
The preparation of quantum dot glue：0.5 part of organosilicon diffusion particle (DOW CORNING 30-424) is added into 20 parts of acrylic acid trees
In fat UV glue (Bei Teli BTW 604-33), scattered stirring ultrasound, then adds 0.1 part of green quantum dot (Na Meina at a high speed
Rice QDG-530) and 0.025 part of red quantum dot (receive U.S. nanometer QDG-620), stirring is mixed, and quantum dispensing is made in vacuum defoamation
Water.
The preparation of quantum dot film：On the glass substrate, primary coat is face-up for the barrier basement membrane tiling that embodiment 1 is obtained.Will
1.5 deals point glue, which is squeezed, is about 8cm in Obstruct membrane one end, then sticks another barrier basement membrane that embodiment 1 is obtained, primary coat
Down, be 100 μm with thickness, a length of 10cm four sides blade applicator scraped from glue to the other end at that end, then diaphragm is placed
It is 800mJ/cm in solidification power2UV light under solidify 2 minutes, obtain quantum dot film.The quantum dot film gross thickness is 172 μm,
Mist degree is 90%.
Comparative example
With business Obstruct membrane (Minolta KMBH07-38,100 μ m-thicks, aqueous vapor rejection rate 0.03g/m2.day) substitute and implement
Obstruct membrane basement membrane in example 4, using with embodiment 4 same quantum dot glue and film-forming method, obtains the amount that total thickness is 300 μm
Son point film, its mist degree is 90%.
Quantum dot film in embodiment 4, comparative example is cut into the wide sample of 16cm length, 10cm, hot and humid survey is suspended on
Try (85 DEG C of temperature, humidity 85%RH) in case and carry out degradation 1000 hours.In test, diaphragm is taken out in seclected time point,
With 455nm blue light source excitation diaphragm, the luminous intensity of test diaphragm fixed position.The hair of two 0 point relative to the time of diaphragms
The luminous intensity trend that changes with time is as shown in Figure 5.As shown by data, using the present invention obstruct basement membrane quantum dot film its with the time
Stability with using business Obstruct membrane quantum dot film approach, can meet commercialization quantum dot film it is small in the aging condition 1000
When, requirement of the luminous intensity decay less than 15%.
It is described above, it is intended merely to illustrate indivedual case study on implementation of the present invention, not makees any form to the present invention
On limitation.Although the present invention is disclosed above with separate embodiment, but is not limited to the present invention.It is any that to be familiar with sheet special
The technical staff of industry, without departing from the scope of the present invention, using the technology contents of the disclosure above make it is a little more
Dynamic or modification will be considered as the equivalence enforcement case of equivalent variations.In every case without departing from technical solution of the present invention content, according to this hair
Bright technical spirit, it is within the spirit and principles in the present invention, any simple modification for being made to above case study on implementation, equivalent
Replace and improve etc., belong within the protection domain of technical solution of the present invention.
Claims (10)
1. the preparation method of high-performance separation film, comprises the following steps：
1) will at least two be packed for barrier film by bond glue fit, after solidification, obtain compound substrate membranes；
2) in step 1) obtained one layer of heat cure primary coat glue of compound substrate membranes coated on one side, after baking and curing, obtain the bottom of with
The compound substrate membranes of coating；
3) in step 2) the obtained another side of the compound substrate membranes with priming coat is by using any in following three method
One kind carries out rough surface processing：
First method：It is coated with one layer of glue containing diffusion particle；
Second method：One layer of UV solidified glue of coating simultaneously carries out UV glue impressings；
The third method：One layer of heat cure glue of coating simultaneously carries out laser beam marking；
Make compound substrate membranes that there is rough layer.
2. the preparation method of high-performance separation film according to claim 1, it is characterised in that the step 1) in packaging
It is one kind in PET Obstruct membranes, PC Obstruct membranes, the multi-layer co-extruded Obstruct membranes of EVOH, the multi-layer co-extruded Obstruct membrane of nylon with barrier film
Or more than one.
3. the preparation method of high-performance separation film according to claim 1 or 2, it is characterised in that the step 1) in glue
Rubber alloy water is one kind in methacrylic resin class UV solidified glues, polyurethanes heat cure glue, pressure sensitive adhesive.
4. the preparation method of high-performance separation film according to claim 1, it is characterised in that the step 2) midsole gluing
Water is one kind in polyurethanes heat cure glue, crylic acid resin heat cure glue, pressure sensitive adhesive.
5. the preparation method of high-performance separation film according to claim 1, it is characterised in that the step 3) in contain
The glue of diffusion particle is the polyurethanes heat cure glue containing organic silicon particle or polymer microsphere；UV glue impressing is used
Glue be methacrylic resin UV photocuring glue；The glue that laser beam marking is used is polyurethanes heat cure glue, third
One kind in olefin(e) acid resinae heat cure glue, pressure sensitive adhesive.
6. the preparation method of the high-performance separation film according to claim 1 or 4, it is characterised in that the step 2) in
The thickness of priming coat is 2-10 μm after solidification；Base coating surface tension force >=46 dyne.
7. the preparation method of high-performance separation film according to claim 1 or 5, it is characterised in that the step 3) in
The thickness for being coated with the rough layer of diffusion particle method is 2-15 μm.
8. the preparation method of high-performance separation film according to claim 1 or 5, it is characterised in that the step 3) in
The UV glue stamped method imprints depth of lines≤10 μm.
9. the preparation method of high-performance separation film according to claim 1 or 5, it is characterised in that the step 3) in
Laser beam marking method laser ablation depth of lines is 1-8 μm.
10. a kind of preparation method of high-performance separation film with described in claim 1 prepares high-performance separation film.
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| CN201710678445.9A CN107264002A (en) | 2017-08-10 | 2017-08-10 | The preparation method and product of high-performance separation film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596299A (en) * | 2020-12-07 | 2021-04-02 | 佛山佛塑科技集团股份有限公司 | Quantum dot film and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487857A (en) * | 2013-10-11 | 2014-01-01 | 张家港康得新光电材料有限公司 | Quantum dot film and backlight module |
| WO2015122437A1 (en) * | 2014-02-13 | 2015-08-20 | 富士フイルム株式会社 | Laminate film manufacturing method |
| CN106626574A (en) * | 2016-12-05 | 2017-05-10 | 纳晶科技股份有限公司 | Organic barrier film, quantum dot film, backlight module and light emitting device |
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2017
- 2017-08-10 CN CN201710678445.9A patent/CN107264002A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487857A (en) * | 2013-10-11 | 2014-01-01 | 张家港康得新光电材料有限公司 | Quantum dot film and backlight module |
| WO2015122437A1 (en) * | 2014-02-13 | 2015-08-20 | 富士フイルム株式会社 | Laminate film manufacturing method |
| CN106626574A (en) * | 2016-12-05 | 2017-05-10 | 纳晶科技股份有限公司 | Organic barrier film, quantum dot film, backlight module and light emitting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596299A (en) * | 2020-12-07 | 2021-04-02 | 佛山佛塑科技集团股份有限公司 | Quantum dot film and preparation method and application thereof |
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