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CN112406207A - Reflection type composite brightness enhancement film suitable for inner module of electronic display screen and preparation method thereof - Google Patents

Reflection type composite brightness enhancement film suitable for inner module of electronic display screen and preparation method thereof Download PDF

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Publication number
CN112406207A
CN112406207A CN202011135340.7A CN202011135340A CN112406207A CN 112406207 A CN112406207 A CN 112406207A CN 202011135340 A CN202011135340 A CN 202011135340A CN 112406207 A CN112406207 A CN 112406207A
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China
Prior art keywords
parts
adhesive
film
picasus
electronic display
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Pending
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CN202011135340.7A
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Chinese (zh)
Inventor
华路
刘艳山
朱伟建
李胜辉
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Guangdong Xuanlang Industrial Co ltd
Heyuan Xuanlang Photoelectric Technology Co ltd
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Guangdong Xuanlang Industrial Co ltd
Heyuan Xuanlang Photoelectric Technology Co ltd
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Priority to CN202011135340.7A priority Critical patent/CN112406207A/en
Publication of CN112406207A publication Critical patent/CN112406207A/en
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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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B32B27/08—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 of synthetic resin
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • 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
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • 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
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/162—Cleaning
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/10—Homopolymers or copolymers of methacrylic acid esters
    • C09J133/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

A reflection-type composite brightness enhancement film suitable for an internal module of an electronic display screen and a preparation method thereof comprise a PICASUS film, an adhesive and a high-transparency film, wherein the adhesive is adhered to the back surface of the PICASUS film, the high-transparency film is adhered to the adhesive, the adhesive is prepared firstly, then the PICASUS film is subjected to dust removal and static electricity removal treatment, and then the adhesive is coated on the surface of the PICASUS film; drying, unreeling the high-permeability film, and attaching the high-permeability film to the adhesive; and then carrying out curing detection, cutting detection and packaging for shipment after the quality is qualified. The invention is easy to realize, has high production efficiency and yield and flexible use, can effectively reduce the light source loss, increase the light source transmittance and increase the display brightness.

Description

Reflection type composite brightness enhancement film suitable for inner module of electronic display screen and preparation method thereof
Technical Field
The invention belongs to the technical field of thin films, and particularly relates to a reflection-type composite brightness enhancement film suitable for being used in an electronic display screen inner module and a preparation method thereof.
Background
With the high-speed development of electronic technology products, various electronic product instruments such as televisions, panels, computers, notebooks, mobile phones, vehicles, large-scale LED lamps, large-scale advertising lamp frames and the like are widely used. The display module is used as a main part of each electronic display screen, the backlight module is one of key components of the liquid crystal display device, and the important function of the backlight module is to provide liquid crystal particles in a uniform surface light source activation quantum film for use as a display panel because liquid crystal does not emit light.
In the prior art, a conventional liquid crystal display backlight module mainly comprises a reflective film, a light source, a light guide plate and a diffusion film, wherein light is reflected to the diffusion film through the reflective film, and the optical effects of uniform light energy distribution and light gathering are achieved by utilizing the light homogenizing effect of the diffusion film and the light gathering effect of a brightness enhancement film. However, the diffusion film in such a backlight module mainly functions to correct the diffusion angle, which increases the light radiation area, but reduces the light intensity per unit area, i.e., reduces the luminance, and tends to cause a yellow spot phenomenon. According to the research, after light emitted from the conventional backlight source passes through the optical films such as the reflective film and the diffusion film, only about 60% of the light enters the display module through the backlight module, and only less than 10% of the light is left after the light passes through the LC and the Surface. The choice of backlight design and materials is important. The invention can fully solve the problem in order to reduce the light source loss, increase the light source transmittance and increase the display brightness.
Disclosure of Invention
The invention aims to provide a reflection-type composite brightness enhancement film suitable for an inner module of an electronic display screen and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
be suitable for compound brightness enhancement film of reflection-type of module in electronic display screen, including PICASUS membrane, adhesive layer, high membrane of passing through, the adhesive is pasted at the back of PICASUS membrane, and high membrane laminating of passing through is on the adhesive.
The high-permeability film is a PET film or a PC film; the adhesive is acrylic acid adhesive, polyurethane adhesive or hot melt adhesive.
The thickness of the high-permeability membrane is 100-250 mu m; the thickness of the PICASUS membrane is 25-100 mu m; the thickness of the adhesive layer is 10-55 mu m.
The adhesive is a two-component acrylic adhesive which is prepared by mixing a component A and a component B and then dispersing and polymerizing in a high-pressure reaction kettle, wherein:
the component A comprises the following materials in parts by weight: 160-200 parts of methyl methacrylate, 4-15 parts of butyl acrylate, 8-15 parts of glycidyl methacrylate, 15 parts of cumene hydroperoxide, 2-6 parts of dodecyl mercaptan and 3-5 parts of a reinforcing agent;
the component B comprises the following materials in parts by weight: 100-130 parts of methyl methacrylate, 25-75 parts of hydroxyethyl methacrylate, 5-8 parts of trimethoxy propane and triphenyl triisocyanate, and a reducing agent: 9-15 parts of amine, 5-10 parts of methyl olefine acid, 1-2 parts of a dispersing agent, 10-20 parts of a reactive diluent, 2-3 parts of a plasticizer, 1-5 parts of ethyl acetate, 5-15 parts of tert-butyl alcohol, 30-40 parts of butyl acetate and 5-15 parts of acetylacetone.
The high-temperature-resistant water-resistant stable high polymer material is also added into the double-component acrylic adhesive in parts by weight: 5-10 parts of divinylbenzene, 0.5-1 part of dianhydride and 0.6-1 part of silane.
The double-component acrylic adhesive is further added with 5-15 parts by weight of a high-light-guide PMMA material and 5-10 parts by weight of a PC material.
The adhesive is prepared by adopting the following steps:
according to the set dosage, adding methyl methacrylate, PMMA material, butyl acrylate, glycidyl methacrylate and dodecyl mercaptan into a glue preparation reaction kettle, stirring and dissolving, then sequentially adding ethyl acetate, tert-butyl alcohol, butyl acetate, acetylacetone and reinforcing agent, and stirring and mixing uniformly; keeping the temperature in the glue preparation reaction kettle between 100 and 120 ℃, controlling the pressure in the glue preparation reaction kettle between 0.1 and 0.25MPa, continuously stirring for 3 to 4 hours, cooling after the materials are completely dissolved, adding cumene hydroperoxide, divinylbenzene, dianhydride and silane, stirring until the materials are uniformly dispersed, and discharging to obtain a component A;
adding methyl methacrylate, hydroxyethyl methacrylate, a stabilizer, trimethoxy propane, triphenyl triisocyanic acid, an active diluent and a dispersing agent into a glue preparation reaction kettle, stirring and dissolving, and then sequentially adding an alkyl alkoxide, a plasticizer, formamide, ethyl acetate, tert-butyl alcohol, butyl acetate and acetylacetone; keeping the temperature in the glue preparation reaction kettle between 55 and 70 ℃, controlling the pressure in the glue preparation reaction kettle between 0.1 and 0.25MPa, continuously stirring for 3 to 4 hours, cooling after the materials are completely dissolved, adding an accelerant, stirring until the materials are uniformly dispersed, and discharging to obtain a component B;
and mixing the components in the ratio of A to B =100 to 1-1.5 to obtain the adhesive.
A preparation method of a reflection-type composite brightness enhancement film suitable for an internal module of an electronic display screen comprises the following steps:
preparing an adhesive prepared in advance;
and (2) carrying out dust removal, static elimination and preheating treatment on the PICASUS film, then coating an adhesive on the surface of the PICASUS film, and keeping the temperature of the PICASUS film subjected to preheating treatment at 45-55 ℃.
Drying, unreeling the high-permeability film, and attaching the high-permeability film to the adhesive;
and then carrying out curing detection, cutting detection and packaging for shipment after the quality is qualified.
And (3) carrying out dust removal and static removal treatment on the PICASUS membrane through a negative ion fan.
Coating a layer of adhesive with the thickness of 0.015-0.055mm on the surface of the PICASUS membrane back layer in a scraper or extrusion coating mode, drying the adhesive by an oven, attaching the adhesive to a high-permeability membrane, and rolling to finish the preparation.
The invention is easy to realize, has high production efficiency and yield, is flexible to use, can effectively reduce the loss of the light source, increases the transmittance of the light source, increases the display brightness, and can keep the high-efficiency brightness enhancement performance for a long time.
Drawings
FIG. 1 is a schematic cross-sectional structure of a membrane of the present invention;
FIG. 2 is a schematic diagram of the present invention in a use configuration;
FIG. 3 is a schematic view of the application of the present invention in conjunction with a light-guiding diffusion film;
FIG. 4 is a schematic diagram of the application of the present invention in conjunction with quantum films.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
The utility model provides a be suitable for compound brightness enhancement film of reflection-type of module in electronic display screen, includes PICASUS film 101, adhesive layer 102, highly passes through membrane 103, and the adhesive pastes the back at the PICASUS film, highly passes through the laminating of membrane on the adhesive. The Dongli PICASUS film is used for selecting a product of the Nippon Dongli company, has the functions of reflecting red and green light by light wave intensity single transmission and light wave low absorption and transmitting blue light with low light wave, and is flexibly applied by an adhesive with light guide and permeability increasing performance.
The high-permeability film is a PET film or a PC film with high permeability; the adhesive is acrylic acid adhesive, polyurethane adhesive or hot melt adhesive. The thickness of the high-permeability membrane is 100-250 mu m; the thickness of the PICASUS membrane is 25-100 mu m; the thickness of the adhesive layer is 10-55 mu m. The acrylic acid adhesive has the characteristics of light guiding, high transmittance and low light absorption.
Because the thickness of the PICASUS film is only 25-100 mu m and is relatively thin, the thickness is very soft, the PICASUS film is not easy to process, cut and form, and is easy to wrinkle and deform during assembly. Therefore, the adhesive and the 0.1-0.25mm high-transmittance optical PET film or PC film are compounded together, so that the product has the advantages of stiffness, no deformation, easy cutting and assembly and processing efficiency improvement.
For the adhesive, a double-component acrylic adhesive is adopted, and the double-component acrylic adhesive is prepared by mixing a component A and a component B and then dispersing and polymerizing in a high-pressure reaction kettle, wherein:
the component A comprises the following materials in parts by weight: 160-200 parts of methyl methacrylate, 4-15 parts of butyl acrylate, 8-15 parts of glycidyl methacrylate, 15 parts of cumene hydroperoxide, 2-6 parts of dodecyl mercaptan and 3-5 parts of reinforcing agent.
The component B comprises the following materials in parts by weight: 100-130 parts of methyl methacrylate, 25-75 parts of hydroxyethyl methacrylate, 5-8 parts of trimethoxy propane and triphenyl triisocyanate, and a reducing agent: 9-15 parts of amine, 5-10 parts of methyl olefine acid, 1-2 parts of a dispersing agent, 10-20 parts of a reactive diluent, 2-3 parts of a plasticizer, 1-5 parts of ethyl acetate, 5-15 parts of tert-butyl alcohol, 30-40 parts of butyl acetate and 5-15 parts of acetylacetone.
The A component and the B component are mixed together to form the two-component acrylic adhesive.
As a further scheme, the high-temperature-resistant, water-resistant and stable high polymer material is also added into the double-component acrylic adhesive in parts by weight: the adhesive comprises, by weight, 5-10 parts of divinylbenzene, 0.5-1 part of dianhydride and 0.6-1 part of silane, so that the adhesive has the characteristics of high temperature resistance and water resistance, and the high temperature caused by the adhesive in transportation is ensured, and the phenomena of color change and yellowing cannot occur due to the high temperature influence generated by the electronic equipment in use when the adhesive is applied to the electronic equipment.
In addition, for the resin in the double-component acrylic adhesive, a low-light-absorption high-transmittance material can be selected, so that the absorption of a light source is reduced, and the light source can pass through the adhesive with high efficiency.
In addition, 5-15 parts of high-light-conductivity PMMA material and 5-10 parts of PC material are added into the double-component acrylic adhesive in parts by weight, and the high light conductivity of the PMMA material is utilized to improve the transmittance of the PICASUS film by 10-15%. The light source is quickly transmitted to other quantum films with little loss.
For the preparation of the adhesive, the following procedure was used:
according to the set dosage, adding methyl methacrylate, PMMA material, butyl acrylate, glycidyl methacrylate and dodecyl mercaptan into a glue preparation reaction kettle, stirring and dissolving, then sequentially adding ethyl acetate, tert-butyl alcohol, butyl acetate, acetylacetone and reinforcing agent, and stirring and mixing uniformly; and (3) keeping the temperature in the glue preparation reaction kettle between 100 and 120 ℃, controlling the pressure in the glue preparation reaction kettle between 0.1 and 0.25MPa, continuously stirring for 3 to 4 hours, cooling after the materials are completely dissolved, adding cumene hydroperoxide, divinylbenzene, dianhydride and silane, stirring until the materials are uniformly dispersed, and discharging to obtain the component A.
Adding methyl methacrylate, hydroxyethyl methacrylate, a stabilizer, trimethoxy propane, triphenyl triisocyanic acid, an active diluent and a dispersing agent into a glue preparation reaction kettle, stirring and dissolving, and then sequentially adding an alkyl alkoxide, a plasticizer, formamide, ethyl acetate, tert-butyl alcohol, butyl acetate and acetylacetone; keeping the temperature in the glue preparation reaction kettle between 55 and 70 ℃, controlling the pressure in the glue preparation reaction kettle between 0.1 and 0.25MPa, continuously stirring for 3 to 4 hours, cooling after the materials are completely dissolved, adding an accelerant, stirring until the materials are uniformly dispersed, and discharging to obtain the component B.
Pouring the component A and the component B into a liquid preparation cylinder according to the proportion of A: B =100:1-1.5, adding a solvent, stirring for 25 minutes, stirring uniformly, and vacuumizing for later use.
A preparation method of a reflection-type composite brightness enhancement film suitable for an internal module of an electronic display screen comprises the following steps:
an adhesive prepared in advance is prepared.
The method comprises the following steps of carrying out dust removal, static elimination and preheating treatment on the PICASUS film, then coating an adhesive on the surface of the PICASUS film, keeping the temperature of the preheated PICASUS film at 45-55 ℃, baking the PICASUS film in a baking oven for 24 hours, and enabling the PICASUS film to reach a shrinkage state in advance after preheating, so that the phenomenon that the product is warped and unsmooth due to single-side shrinkage of the PICASUS film after being attached to PET is avoided.
Drying, unreeling the high-permeability film, and attaching the high-permeability film to the adhesive;
and then carrying out curing detection, cutting detection and packaging for shipment after the quality is qualified. The curing detection and the cutting detection are the known technologies of the film detection in the prior art.
And (3) carrying out dust removal and static removal treatment on the PICASUS membrane through a negative ion fan. Coating a layer of adhesive with the thickness of 0.015-0.055mm on the surface of the PICASUS membrane back layer in a scraper or extrusion coating mode, drying the adhesive by an oven, attaching the adhesive to a high-permeability membrane, and rolling to finish the preparation.
The invention is mainly applicable to the module in the electronic display. As shown in fig. 2, the composite brightness enhancement film 1 is disposed between the light guide diffusion plate 4 and the QD quantum film 5, and a part of light emitted from the LED lamp 3 enters the light guide diffusion plate 4, and a part of light reflected by the light guide diffusion plate 4 is reflected by the reflection film 2 into the light guide diffusion plate 4 for transmission.
The traditional combination without composite brightness enhancement is that the light source is directly transmitted into the QD quantum film, but the light source reflected by the quantum film cannot be well utilized again and is lost.
Through installing this compound brightness enhancement film additional, can let the light source of leaded light diffuser plate enter into the QD quantum film through this compound brightness enhancement film fast high-efficiently in the quantum film below, can go to QD quantum film with the reflection of the visible useful light source ruddiness that the refraction was returned and the reflection of green glow closely again to the QD quantum film simultaneously. This achieves a fast guiding and low loss of light from the light guiding diffuser plate. The light reflected by the QD quantum film can be recycled by the PICASUS film surface, so that the brightness of the display screen is improved by 20-30%, the strong light source transmitted by the light guide diffusion plate is transmitted into the QD quantum film by the light guide anti-reflection adhesive and the PICASUS film high transmittance, and the quantum liquid crystal is activated, so that the efficient utilization of the light is realized.
Utilize PICASUS membrane itself to have the chromatogram of metal sense, reflect QD quantum film back the useful light (ruddiness, green glow) of low light source and closely few loss reflection once more and go back for QD quantum film and carry out reuse, avoid the loss of light, improve the utilization ratio.
In addition, the PICASUS film 101 and the light guide and diffusion plate 6 can be combined together by flexibly using the adhesive 102 according to different production processes, as shown in fig. 3; PICASUS film 101 may also be laminated to QD quantum film 7 using adhesive 102. The processing, cutting, forming, assembling and using are convenient, the process cost is saved, and the efficiency and the yield are improved.
The invention realizes the compounding of the PICASUS film and other films by using the adhesive with high light guiding, high permeability increasing, strong adhesive force and low light absorption as an adhesive, can fully utilize light rays, reduces the loss of the light rays and further improves the display brightness.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements, and the like can be made in the technical solutions of the foregoing embodiments or in some of the technical features of the foregoing embodiments, but those modifications, equivalents, improvements, and the like are all within the spirit and principle of the present invention.

Claims (10)

1. Be suitable for compound brightness enhancement film of reflection-type of module in electronic display screen, its characterized in that includes PICASUS membrane, adhesive, high membrane that passes through, the adhesive is pasted at the back of PICASUS membrane, and the laminating of high membrane that passes through is on the adhesive.
2. The reflective composite brightness enhancement film for use in an electronic display module according to claim 1, wherein the high-transmittance film is a PET film or a PC film; the adhesive is acrylic acid adhesive, polyurethane adhesive or hot melt adhesive.
3. The reflective composite brightness enhancement film suitable for the electronic display screen inner module according to claim 2, wherein the thickness of the high-transmittance film is 100-250 μm; the thickness of the PICASUS membrane is 25-100 mu m; the thickness of the adhesive layer is 10-55 mu m.
4. The reflection-type composite brightness enhancement film suitable for an inner module of an electronic display screen as claimed in claim 3, wherein the adhesive is a two-component acrylic adhesive prepared by mixing a component A and a component B and dispersing and polymerizing the components in a high pressure reactor, wherein:
the component A comprises the following materials in parts by weight: 160-200 parts of methyl methacrylate, 4-15 parts of butyl acrylate, 8-15 parts of glycidyl methacrylate, 15 parts of cumene hydroperoxide, 2-6 parts of dodecyl mercaptan and 3-5 parts of a reinforcing agent;
the component B comprises the following materials in parts by weight: 100-130 parts of methyl methacrylate, 25-75 parts of hydroxyethyl methacrylate, 5-8 parts of trimethoxy propane and triphenyl triisocyanate, and a reducing agent: 9-15 parts of amine, 5-10 parts of methyl olefine acid, 1-2 parts of a dispersing agent, 10-20 parts of a reactive diluent, 2-3 parts of a plasticizer, 1-5 parts of ethyl acetate, 5-15 parts of tert-butyl alcohol, 30-40 parts of butyl acetate and 5-15 parts of acetylacetone.
5. The reflection-type composite brightness enhancement film suitable for the inner module of the electronic display screen as claimed in claim 4, wherein the two-component acrylic adhesive further comprises a high temperature resistant, water resistant and stable polymer material in parts by weight: 5-10 parts of divinylbenzene, 0.5-1 part of dianhydride and 0.6-1 part of silane.
6. The reflection-type composite brightness enhancement film suitable for the inner module of the electronic display screen as claimed in claim 5, wherein 5-15 parts by weight of high light-guiding PMMA material and 5-10 parts by weight of PC material are further added into the two-component acrylic adhesive.
7. The reflective composite brightness enhancing film for use in an electronic display module according to claim 6, wherein the adhesive is prepared by:
according to the set dosage, adding methyl methacrylate, PMMA material, butyl acrylate, glycidyl methacrylate and dodecyl mercaptan into a glue preparation reaction kettle, stirring and dissolving, then sequentially adding ethyl acetate, tert-butyl alcohol, butyl acetate, acetylacetone and reinforcing agent, and stirring and mixing uniformly; keeping the temperature in the glue preparation reaction kettle between 100 and 120 ℃, controlling the pressure in the glue preparation reaction kettle between 0.1 and 0.25MPa, continuously stirring for 3 to 4 hours, cooling after the materials are completely dissolved, adding cumene hydroperoxide, divinylbenzene, dianhydride and silane, stirring until the materials are uniformly dispersed, and discharging to obtain a component A;
adding methyl methacrylate, hydroxyethyl methacrylate, a stabilizer, trimethoxy propane, triphenyl triisocyanic acid, an active diluent and a dispersing agent into a glue preparation reaction kettle, stirring and dissolving, and then sequentially adding an alkyl alkoxide, a plasticizer, formamide, ethyl acetate, tert-butyl alcohol, butyl acetate and acetylacetone; keeping the temperature in the glue preparation reaction kettle between 55 and 70 ℃, controlling the pressure in the glue preparation reaction kettle between 0.1 and 0.25MPa, continuously stirring for 3 to 4 hours, cooling after the materials are completely dissolved, adding an accelerant, stirring until the materials are uniformly dispersed, and discharging to obtain a component B;
and mixing the components in the ratio of A to B =100 to 1-1.5 to obtain the adhesive.
8. The method for preparing a reflection type composite brightness enhancement film suitable for an inner module of an electronic display screen according to any one of claims 1 to 7, comprising the following steps:
preparing an adhesive prepared in advance;
carrying out dust removal, static elimination and preheating treatment on the PICASUS membrane, then coating an adhesive on the surface of the PICASUS membrane, and keeping the temperature of the PICASUS membrane subjected to preheating treatment at 45-55 ℃;
drying, unreeling the high-permeability film, and attaching the high-permeability film to the adhesive;
and then carrying out curing detection, cutting detection and packaging for shipment after the quality is qualified.
9. The method as claimed in claim 8, wherein the PICASUS film is subjected to de-dusting and de-static treatment by a negative ion blower.
10. The method of claim 9, wherein the PICASUS film is coated with a layer of adhesive of 0.015-0.055mm thickness by doctor blade or extrusion coating, oven dried, laminated with a high-permeability film, and rolled to obtain the final product.
CN202011135340.7A 2020-10-21 2020-10-21 Reflection type composite brightness enhancement film suitable for inner module of electronic display screen and preparation method thereof Pending CN112406207A (en)

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