CN108178839B - Reflective film - Google Patents
Reflective film Download PDFInfo
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- CN108178839B CN108178839B CN201810017687.8A CN201810017687A CN108178839B CN 108178839 B CN108178839 B CN 108178839B CN 201810017687 A CN201810017687 A CN 201810017687A CN 108178839 B CN108178839 B CN 108178839B
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- 239000010410 layer Substances 0.000 claims abstract description 194
- 239000011248 coating agent Substances 0.000 claims abstract description 83
- 238000000576 coating method Methods 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 claims abstract description 51
- 239000011241 protective layer Substances 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 26
- 238000007639 printing Methods 0.000 claims description 21
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 18
- 229910052731 fluorine Inorganic materials 0.000 claims description 18
- 239000011737 fluorine Substances 0.000 claims description 18
- 239000003960 organic solvent Substances 0.000 claims description 16
- 239000004925 Acrylic resin Substances 0.000 claims description 15
- 229920000178 Acrylic resin Polymers 0.000 claims description 15
- 239000012752 auxiliary agent Substances 0.000 claims description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 239000000178 monomer Substances 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 9
- 238000007650 screen-printing Methods 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
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- 238000007599 discharging Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 47
- 229910052709 silver Inorganic materials 0.000 abstract description 47
- 239000004332 silver Substances 0.000 abstract description 47
- 230000003666 anti-fingerprint Effects 0.000 abstract description 9
- 230000003373 anti-fouling effect Effects 0.000 abstract description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 31
- 239000005020 polyethylene terephthalate Substances 0.000 description 31
- 230000000052 comparative effect Effects 0.000 description 23
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 21
- 238000002310 reflectometry Methods 0.000 description 19
- 239000002131 composite material Substances 0.000 description 17
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 12
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 12
- 238000010186 staining Methods 0.000 description 10
- QNODIIQQMGDSEF-UHFFFAOYSA-N (1-hydroxycyclohexyl)-phenylmethanone Chemical compound C=1C=CC=CC=1C(=O)C1(O)CCCCC1 QNODIIQQMGDSEF-UHFFFAOYSA-N 0.000 description 7
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- 230000003669 anti-smudge Effects 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- -1 acrylic ester Chemical class 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 239000003973 paint Substances 0.000 description 2
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- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 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
- 238000003556 assay Methods 0.000 description 1
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- 125000000524 functional group Chemical group 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
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- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
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- 238000007493 shaping process Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Classifications
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
- C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2433/08—Homopolymers or copolymers of acrylic acid esters
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C08J2433/12—Homopolymers or copolymers of methyl methacrylate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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Abstract
The invention relates to the technical field of reflective film materials of backlight LCDs, and also covers the field of similar reflective films, in particular to a high-reliability thin anti-fingerprint high-brightness silver black reflective film. The invention provides a reflecting film, which aims to solve the problem that the existing high-brightness silver black reflecting film has serious warping after reliability. The reflecting film sequentially comprises a hardening coating, a bottom coating, an oxygen-proof waterproof protective layer, an Ag layer, a base material layer, an Al layer and an ink layer. The surface of the reflecting film provided by the invention has high hardness, excellent wear resistance and excellent antifouling property, and solves the problems that the existing high-brightness silver black reflecting film is easily scratched by a light guide plate, and a silver layer is oxidized, so that the backlight brightness is reduced and even the total black is caused; meanwhile, the reflective film provided by the invention is prepared by adopting the single Zhang Jicai, so that the problem of serious warping after finished product reliability is solved.
Description
Technical Field
The invention relates to the technical field of reflective film materials of backlight LCDs, and also covers the field of similar reflective films, in particular to a high-reliability thin anti-fingerprint high-brightness silver black reflective film.
Background
LCDs are non-emissive display technology devices that must use a backlight to display an image. Therefore, the development of the backlight module plays a crucial role in the development of the display. With the development of the ultra-thin liquid crystal display, the backlight module is also developed to be light, thin, low in power consumption, high in brightness and low in cost.
The backlight module is mainly assembled by an LED light source, a lampshade, a reflecting film, a light guide plate, a diffusion film, a brightness enhancement film, an outer frame and the like. The reflecting film has the main function of reflecting the light leaked from the bottom of the light guide plate with high efficiency and no loss, thus reducing the light loss, reducing the electricity consumption and improving the light saturation of the liquid crystal display. Therefore, it is an important study task to reduce the thickness of the reflective film, reduce warpage after reliability of the reflective film, and improve the assembly yield of the reflective film.
The silver black reflective film used at present is prepared by a composite process, and the difference of shrinkage rates of two base material layers can influence the warping of the silver black reflective film after reliability to a great extent. Meanwhile, with the development of future models toward thin type, the existing thickness of 80 or 75 μm in the market cannot meet the demands of customers. Therefore, there is a need to prepare a highly reliable thin anti-finger-staining high-brightness silver black reflective film.
Disclosure of Invention
The invention provides a reflecting film, which aims to solve the problem that the existing high-brightness silver black reflecting film has serious warping after reliability. The surface of the reflecting film provided by the invention has high hardness, excellent wear resistance and excellent antifouling property, and solves the problems that the existing high-brightness silver black reflecting film is easily scratched by a light guide plate, and a silver layer is oxidized, so that the backlight brightness is reduced and even the total black is caused; meanwhile, the reflective film provided by the invention is prepared by adopting the single Zhang Jicai, so that the problem of serious warping after finished product reliability is solved.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a reflecting film, which sequentially comprises a hardening coating, a bottom coating, an anti-oxidation waterproof protective layer (Over coating layer), an Ag layer, a base material layer, an Al layer and an ink layer.
The reflective film includes only one substrate layer.
The reflective film is also called a high-reliability thin anti-finger-staining high-brightness silver black reflective film.
The reflective film is composed of a hardening coating, an undercoat layer, an oxygen-proof and water-proof protective layer (Over coating layer), an Ag layer, a base material layer, an Al layer and an ink layer.
The hardened coating is also referred to as an anti-smudge hardened coating, an anti-smudge hardened layer, and the ink layer is also referred to as an anti-smudge ink layer.
Compared with other composite silver reflecting films, the reflecting film provided by the invention belongs to a single Zhang Yin reflecting film.
Further, in the preparation process, the hardened coating is firstly configured into a coating liquid.
The coating liquid is also called hardening liquid.
Further, the coating liquid of the hardening coating comprises an acrylic ester prepolymer, an acrylic ester monomer, a photoinitiator, a fluorine additive and an organic solvent.
The fluorine additive is also known as a fluorine aid.
The coating liquid of the anti-fingerprint stain hardening coating is rapidly polymerized under the irradiation of a UV lamp, so that fluoride (fluorine additive) floats on the surface of matrix resin, the smoothness and the stain resistance of the surface of the anti-fingerprint stain hardening coating are provided, and the content of functional groups in acrylate prepolymer and monomer has an important influence on the hardness of the surface of the coating, so that the wear resistance of the anti-fingerprint stain hardening coating is influenced.
Further, the material of the bottom coating is selected from one or a combination of acrylic resin and polyurethane.
Further, the material of the bottom coating is selected from one or a combination of at least two of aqueous polyurethane, solvent polyurethane and acrylic system.
Furthermore, the material of the oxygen-proof waterproof protective layer is selected from acrylate polymers.
Furthermore, the material of the oxygen-proof waterproof protective layer is selected from one of acrylic systems.
Furthermore, the Ag layer is prepared by adopting a physical vapor deposition mode.
Further, the material of the substrate layer is selected from one or a combination of Polycarbonate (PC) and polyethylene terephthalate (PET).
Further, the material of the base material layer is preferably polyethylene terephthalate (PET).
Furthermore, the PET substrate adopts a transparent substrate with low shrinkage rate.
Further, the ink layer is prepared in a silk screen printing mode.
Further, the Ag layer has a thickness of 30-80nm, the base layer has a thickness of 25-75 μm, the Al layer has a thickness of 0-60nm, and the ink layer has a thickness of 0.5-1.5 μm.
The thickness of the cured coating layer was 4. Mu.m, the thickness of the primer layer was 0.1. Mu.m, and the thickness of the oxygen-preventing water-proof protective layer was 0.2. Mu.m.
The anti-fingerprint hardening coating, the bottom coating, the anti-oxygen waterproof protective layer, the Ag layer, the PET layer, the Al layer and the ink layer are limited in the range, and the anti-fingerprint hardening coating has better control property on warping and assembly yield after the reliability of the final high-brightness silver black reflective film.
Further, the thickness of the Ag layer is preferably 40-60nm.
Further, the thickness of the Ag layer is preferably 50nm.
Further, the thickness of the PET substrate layer is preferably 50 to 75. Mu.m.
Further, the thickness of the Al layer is preferably 20 to 30nm.
Further, the thickness of the Al layer is preferably 30nm.
Further, the thickness of the ink layer is preferably 0.7 to 1. Mu.m.
Further, the warpage of the reflective film is 0-1mm when the reflective film is produced off line, the warpage after reliability is 0-3mm, and the reflectivity is more than 96.0%.
The reflectivity refers to the reflectivity of the reflective film during the production and the off-line.
Further, the coating liquid of the anti-smudge hardening coating layer includes 30 parts by weight of a hexafunctional urethane acrylic prepolymer, 18 parts by weight of a trifunctional urethane acrylic prepolymer, 12 parts by weight of a trifunctional acrylate monomer, 3.6 parts by weight of a photoinitiator (photoinitiator 184), 0.3 parts by weight of a fluorine auxiliary agent, and 40 parts by weight of an organic solvent. Wherein the organic solvent is ethyl acetate.
The present invention also provides a method of preparing a reflective film, the method comprising the steps of:
(1) Pretreating a high-transparency substrate, and then evaporating an Ag layer on one side of the substrate;
(2) Coating an oxygen-proof waterproof protective layer on the surface of the Ag layer;
(3) Coating a layer of base coat on the surface of the anti-oxidation waterproof protective layer for coating a subsequent hardening liquid;
(4) Coating hardening liquid on the bottom coating, and curing to obtain a hardening coating;
(5) Evaporating an Al layer on the other surface of the PET;
(6) Coating a protective film on the surface of the hardening coating;
(7) Printing ink on the Al layer in a screen printing mode;
(8) And (5) splitting, packaging and discharging.
Further, the silk screen printing times of the ink are 2-6 times.
Further, the silk screen printing times of the ink are 3-4 times.
The ink is also referred to as an anti-smudge ink.
Compared with the existing high-brightness silver black reflecting film, the surface of the reflecting film provided by the invention has high hardness, excellent wear resistance and excellent antifouling property, and meanwhile, as the reflecting film is a non-composite film, the warping degree after the material reliability is less than or equal to 3mm, and the reflectivity is more than 96.0%.
The reflective film provided by the invention has the following technical effects:
1. after the silver layer is coated with the anti-fingerprint hardened layer, the characteristics of high wear resistance and high hardness can be realized, the scratch of the light guide plate on the surface of the reflecting sheet can be avoided, the function of protecting the silver reflecting film is achieved, meanwhile, the light guide plate is not scratched or scratched, and the high reliability is realized;
2. the mode of printing the anti-finger-staining ink after evaporating the aluminum layer on the PET substrate layer has the characteristics of high anti-staining property and high taste, and can reduce the influence of finger staining and the like on the material yield in the assembly process;
3. the method for preparing the reflecting film by adopting the single Zhang Jicai reduces the warpage of the materials after production and reliability, and avoids the problem that the warpage of the composite materials on the market is difficult to control, thereby further improving the yield of the whole machine assembly.
Drawings
FIG. 1 is a schematic diagram of a reflective film according to the present invention;
FIG. 2 is a schematic diagram of a conventional aluminum-plated high-brightness silver black reflective film;
FIG. 3 is a schematic diagram of a conventional white film coated highlight silver black reflective film;
fig. 4 is a schematic structural diagram of a semi-finished reflective film provided by the invention.
Wherein:
10: the anti-finger-dirt hardening coating has the functions of wear resistance and scratch resistance,
20: the primer layer is a coating layer,
30: an oxygen-proof water-proof protective layer,
40: the layer of Ag is formed of a layer of Ag,
50: a PET substrate layer, a PET substrate layer and a PET substrate layer,
60: an Al layer is formed on the surface of the substrate,
70: the ink layer is formed by a printing ink layer,
80: a PET substrate layer or a white film substrate containing barium sulfate,
90: and (5) a hot dry glue composite glue layer.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For a better understanding of the present invention, reference will now be made to the following description of the embodiments of the present invention, taken in conjunction with the accompanying drawings, in which it is evident that only a portion, but not all, of the embodiments of the present invention are described. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, system, article, or apparatus.
The reflective film provided by the present invention will be further described below with reference to examples.
The preparation method of the reflecting film provided by the invention comprises the following steps:
(1) Pretreating a high-transparency substrate, and then evaporating an Ag layer on one side of the substrate;
(2) Coating an oxygen-proof waterproof protective layer on the surface of the Ag layer;
(3) Coating a layer of base coat on the surface of the anti-oxidation waterproof protective layer for coating a subsequent hardening liquid;
(4) Coating hardening liquid on the bottom coating, and curing to obtain a hardening coating;
(5) Evaporating an Al layer on the other surface of the PET;
(6) Coating a protective film on the surface of the hardening coating;
(7) Printing ink on the Al layer in a screen printing mode;
(8) And (5) splitting, packaging and discharging.
Further, the silk screen printing times of the ink are 2-6 times.
The reflective film provided by the invention is subjected to performance test according to the following method:
silver surface reflectance: the reflectance of each silver reflective film was measured at 550nm using an Agilent Cary5000 UV-visible near infrared spectrophotometer according to the NIST 2054 standard. The silver surface reflectivity refers to the reflectivity of the surface layer of the reflecting film, which is the anti-staining hardening layer.
Adhesion force: the adhesion of the ink layer was tested according to the standard of GB 1720-1979 paint film adhesion assay, where 100/100 represents no release and 90/100 represents 10% release.
Abrasion resistance: the wear resistance of each hardened layer was tested according to HG/T4303-2012 method for measuring wear resistance of surface hardened polyester film, using 0000# Steel wool, 1000gf/cm 2 And the weight is loaded, and the wear-resisting effect of the film is judged by detecting the wear-resisting frequency limit of no scratch on the surface of the film.
Water contact angle: the surface water contact angles of the anti-fouling hardening layer and the ink layer are tested according to the standard of GB/T30693-2014 measurement of the contact angle of plastic film and water. The larger the water contact angle is, the stronger the anti-finger-staining ability is.
Reliability post-warp test: the reflective film was subjected to a test after being left at a high temperature and humidity condition of 70 ℃ and 95% humidity for 500 hours, and the warp test was 10cm×10cm in specification, and the warp height test was performed using a plug gauge test.
Black surface reflectance: the reflectivity at 550nm was measured using an Agilent Cary5000 UV-visible near infrared spectrophotometer according to the NIST 2054 standard. The black film surface reflectivity refers to the reflectivity of the surface layer of the reflecting film, which is the surface of the ink layer.
Black flour taste: the reflected light is observed by naked eyes, and the evaluation standard is superbright black, bright black, matt black and supermatt black.
Difficulty degree of processing: the method mainly uses factors such as flattening of materials on machines, and the like, and the judging standard is that high is higher, middle is lower, and is lower, wherein high represents high processing difficulty, but not cannot produce products.
Yield of assembly: and assembling the silver black reflecting film with the specification of 5.5 inches into the proportion of the total number of good products of the backlight according to 1000 sheets.
Pencil hardness: according to GB 1720-1979 "paint film adhesion measurement".
Warpage test: the gauge of the test was 10cm×10cm, and the warp height was measured using a plug gauge.
Example 1
As shown in fig. 4, the present embodiment provides a reflective film semi-finished product including a hardening coating layer, an undercoat layer, an oxygen-proof and water-proof protective layer, an Ag layer, and a base material layer.
Wherein the anti-fingerprint hard layer 10 has a thickness of 4 μm, the primer layer 20 has a thickness of 0.1 μm, the oxygen-preventing and water-preventing protective layer 30 has a thickness of 0.2 μm, the Ag layer 40 has a thickness of 30nm, and the PET substrate layer 50 has a thickness of 50 μm.
The coating liquid of the anti-stain hardening coating comprises 30 parts by weight of a hexafunctional urethane acrylic resin prepolymer, 18 parts by weight of a trifunctional urethane acrylic resin prepolymer, 12 parts by weight of a trifunctional acrylate monomer, 3.6 parts by weight of a photoinitiator (photoinitiator 184), 0.3 part by weight of a fluorine auxiliary agent and 40 parts by weight of an organic solvent. Wherein the organic solvent is ethyl acetate.
The material of the bottom coating is acrylic.
The material of the anti-oxygen waterproof protective layer is acrylic.
Example 2
The semi-finished reflective film as provided in example 1 is different in that the thickness of the Ag layer 40 is 40nm.
Example 3
The semi-finished reflective film as provided in example 1 is different in that the thickness of the Ag layer 40 is 50nm.
Example 4
The semi-finished reflective film as provided in example 1 is different in that the thickness of the Ag layer 40 is 60nm.
Example 5
The semi-finished reflective film as provided in example 1 is different in that the thickness of the Ag layer 40 is 80nm.
Example 6
The invention provides a reflecting film which sequentially comprises a hardening coating, a bottom coating, an oxygen-proof waterproof protective layer, an Ag layer, a base material layer, an Al layer and an ink layer.
Wherein the thickness of the anti-smut hardening layer 10 is 4 μm, the thickness of the primer layer 20 is 0.1 μm, the thickness of the oxygen-preventing and water-preventing protective layer 30 is 0.2 μm, the thickness of the Ag layer 40 is 50nm, the thickness of the pet base material layer 50 is 50 μm, the thickness of the Al layer 60 is 0nm, that is, no Al layer, the number of printing times of the ink layer 70 is 2 times, and the thickness is 0.5 μm.
The coating liquid of the anti-stain hardening coating comprises 30 parts by weight of a hexafunctional urethane acrylic resin prepolymer, 18 parts by weight of a trifunctional urethane acrylic resin prepolymer, 12 parts by weight of a trifunctional acrylate monomer, 3.6 parts by weight of a photoinitiator (photoinitiator 184), 0.3 part by weight of a fluorine auxiliary agent and 40 parts by weight of an organic solvent. Wherein the organic solvent is ethyl acetate.
The material of the bottom coating is acrylic.
The material of the anti-oxygen waterproof protective layer is acrylic.
Example 7
The reflective film as provided in example 6 is different in that the thickness of the Al layer 60 is 20nm.
Example 8
The reflective film as provided in example 6 is different in that the thickness of the Al layer 60 is 30nm.
Example 9
The reflective film as provided in example 6 is different in that the thickness of the Al layer 60 is 60nm.
Example 10
The reflective film as provided in example 6, wherein the anti-smudge hardening layer 10 had a thickness of 4 μm, the undercoat layer 20 had a thickness of 0.1 μm, the oxygen-preventing and water-preventing protective layer 30 had a thickness of 0.2 μm, the Ag layer 40 had a thickness of 50nm, the pet base layer 50 had a thickness of 50 μm, the Al layer 60 had a thickness of 30nm, and the ink layer 70 was printed 3 times, i.e., had a thickness of 0.7 μm.
Example 11
The reflective film as provided in example 9 was different in that the number of printing times of the ink layer 70 was 4, i.e., the thickness was 1.0 μm.
Example 12
The reflective film as provided in example 9 was different in that the number of printing times of the ink layer 70 was 6, i.e., the thickness was 1.5 μm.
Example 13
The reflective film as provided in example 6, wherein the thickness of the stain-resistant hardened layer 10 was 4 μm, the thickness of the undercoat layer 20 was 0.1 μm, the thickness of the oxygen-preventing and water-preventing protective layer 30 was 0.2 μm, the thickness of the Ag layer 40 was 50nm, the thickness of the PET base layer 50 was 25 μm, the thickness of the Al layer 60 was 30nm, and the number of printing of the ink layer 70 was 4, i.e., the thickness was 1.0. Mu.m.
Example 14
The reflective film as provided in example 13 was distinguished in that the thickness of the PET base material layer 50 was 38 μm.
Example 15
The reflective film as provided in example 13 was distinguished in that the thickness of the PET base material layer 50 was 75 μm.
A conventional commercially available high-brightness silver black reflective film is shown in fig. 2, and is a composite material, comprising an Over coating layer 30, an Ag layer 40, a PET substrate layer 50, a hot-dry adhesive composite adhesive layer 90, a PET substrate layer 80, an Al layer 60, and an ink layer 70.
In order to compare the performances of Shan Zhangyin black reflective film (reflective film provided by the invention) and composite silver black reflective film (reflective film provided by the comparative example), especially the warp after reliability, we selected PET substrates (MD. Ltoreq.0.20%, TD. Ltoreq.0.04%) and white film (containing barium sulfate) substrates with similar shrinkage and different thicknesses.
Comparative example 1
As shown in fig. 2, the highlight silver black reflective film provided in comparative example 1 includes an oxygen-preventing and water-preventing protective layer, an Ag layer, a PET substrate layer, a hot-dry adhesive composite adhesive layer, a PET substrate layer, an Al layer, and an ink layer.
Wherein the thickness of the oxygen-proof and water-proof protective layer 30 is 0.2 μm, the thickness of the Ag layer 40 is 50nm, the thickness of the PET substrate layer 50 is 25 μm, the thickness of the hot-dry glue composite adhesive layer 90 is 4 μm, the thickness of the PET substrate layer 80 is 50 μm, the thickness of the Al layer 60 is 30nm, the printing times of the printing ink layer 70 are 4 times, and the formula adopts the printing ink coating liquid without fluorine auxiliary agent, namely the thickness is 1.0 μm.
The material of the oxygen-proof waterproof protective layer is acrylic.
Comparative example 2
The highlight silver black reflective film as provided in comparative example 1, in which the thickness of the oxygen-preventing and water-preventing protective layer 30 was 0.2 μm, the thickness of the Ag layer 40 was 50nm, the thickness of the PET base material layer 50 was 36 μm, the thickness of the hot-dry adhesive composite adhesive layer 90 was 4 μm, the thickness of the PET base material layer 80 was 36 μm, the thickness of the Al layer 60 was 30nm, the number of printing times of the ink layer 70 was 4, and the formulation used an ink coating liquid without a fluorine auxiliary agent, i.e., the thickness was 1.0 μm.
Comparative example 3
The highlight silver black reflective film as provided in comparative example 1, in which the thickness of the oxygen-preventing and water-preventing protective layer 30 was 0.2 μm, the thickness of the Ag layer 40 was 50nm, the thickness of the PET base material layer 50 was 50 μm, the thickness of the hot-dry adhesive composite adhesive layer 90 was 4 μm, the thickness of the PET base material layer 80 was 25 μm, the thickness of the Al layer 60 was 30nm, the number of printing times of the ink layer 70 was 4, and the formulation used an ink coating liquid without a fluorine auxiliary agent, i.e., the thickness was 1.0 μm.
Comparative example 4
As shown in fig. 3, the highlight silver black reflective film provided in comparative example 5 includes an oxygen-preventing and water-preventing protective layer, an Ag layer, a base material layer, a hot-dry glue composite glue layer, a white film base material layer, and an ink layer; the high-brightness silver black reflecting film also comprises a hardening coating and a bottom coating.
Wherein the thickness of the stain-resistant hardened layer is 4 μm, the thickness of the undercoat layer is 0.1 μm, the thickness of the oxygen-preventing water-proof protective layer 30 is 0.2 μm, the thickness of the Ag layer 40 is 50nm, the thickness of the PET base material layer 50 is 50 μm, the thickness of the hot-dry adhesive composite glue layer 90 is 4 μm, the thickness of the white film base material layer (containing barium sulfate material) 80 is 25 μm, the number of times of printing the ink layer 70 is 4, and the formula adopts an ink coating liquid without a fluorine auxiliary agent, namely, the thickness is 1.0 μm.
The coating liquid of the anti-stain hardening coating comprises 30 parts by weight of a hexafunctional urethane acrylic resin prepolymer, 18 parts by weight of a trifunctional urethane acrylic resin prepolymer, 12 parts by weight of a trifunctional acrylate monomer, 3.6 parts by weight of a photoinitiator (photoinitiator 184), 0.3 part by weight of a fluorine auxiliary agent and 40 parts by weight of an organic solvent. Wherein the organic solvent is ethyl acetate.
The material of the bottom coating is acrylic.
The waterproof protective layer is made of acrylic.
Comparative example 5
The highlight silver black reflective film as provided in comparative example 4, in which the thickness of the stain-resistant hardened layer was 4 μm, the thickness of the undercoat layer was 0.1 μm, the thickness of the oxygen-preventing and water-repellent protective layer 30 was 0.2 μm, the thickness of the Ag layer 40 was 50nm, the thickness of the pet base material layer 50 was 36 μm, the thickness of the hot-dry adhesive composite adhesive layer 90 was 4 μm, the thickness of the white film base material layer (containing barium sulfate material) 80 was 36 μm, the number of times of printing of the ink layer 70 was 4 times, and the formulation used an ink coating liquid without a fluorine auxiliary agent, i.e., the thickness was 1.0 μm.
Comparative example 6
The highlight silver black reflective film as provided in comparative example 4, in which the thickness of the stain-resistant hardened layer was 4 μm, the thickness of the undercoat layer was 0.1 μm, the thickness of the oxygen-preventing and water-repellent protective layer 30 was 0.2 μm, the thickness of the Ag layer 40 was 50nm, the thickness of the pet base material layer 50 was 25 μm, the thickness of the hot-dry adhesive composite adhesive layer 90 was 4 μm, the thickness of the white film base material layer (containing barium sulfate material) 80 was 50 μm, the number of times of printing of the ink layer 70 was 4 times, and the formulation used an ink coating liquid without a fluorine auxiliary agent, i.e., the thickness was 1.0 μm.
Comparative example 7
The high-bright silver black reflective film as provided in comparative example 1, further comprising an anti-fingerprint-staining hardening layer having a thickness of 4 μm and an undercoat layer having a thickness of 0.1 μm.
The coating liquid of the anti-stain hardening coating comprises 30 parts by weight of a hexafunctional urethane acrylic resin prepolymer, 18 parts by weight of a trifunctional urethane acrylic resin prepolymer, 12 parts by weight of a trifunctional acrylate monomer, 3.6 parts by weight of a photoinitiator (photoinitiator 184), 0.3 part by weight of a fluorine auxiliary agent and 40 parts by weight of an organic solvent. Wherein the organic solvent is ethyl acetate.
The material of the bottom coating is acrylic.
Comparative example 8
The high-bright silver black reflective film as provided in comparative example 2 further includes an anti-finger staining hardening layer having a thickness of 4 μm and a primer layer having a thickness of 0.1 μm.
The coating liquid of the anti-stain hardening coating comprises 30 parts by weight of a hexafunctional urethane acrylic resin prepolymer, 18 parts by weight of a trifunctional urethane acrylic resin prepolymer, 12 parts by weight of a trifunctional acrylate monomer, 3.6 parts by weight of a photoinitiator (photoinitiator 184), 0.3 part by weight of a fluorine auxiliary agent and 40 parts by weight of an organic solvent. Wherein the organic solvent is ethyl acetate.
The material of the bottom coating is acrylic.
Comparative example 9
The high-bright silver black reflective film as provided in comparative example 3, further comprising an anti-fingerprint-staining hardening layer having a thickness of 4 μm and an undercoat layer having a thickness of 0.1 μm.
The coating liquid of the anti-stain hardening coating comprises 30 parts by weight of a hexafunctional urethane acrylic resin prepolymer, 18 parts by weight of a trifunctional urethane acrylic resin prepolymer, 12 parts by weight of a trifunctional acrylate monomer, 3.6 parts by weight of a photoinitiator (photoinitiator 184), 0.3 part by weight of a fluorine auxiliary agent and 40 parts by weight of an organic solvent. Wherein the organic solvent is ethyl acetate.
The material of the bottom coating is acrylic.
TABLE 1 reflective Performance test results of semi-finished reflective films provided in examples 1-5
| Performance of | Reflectivity of silver surface |
| Example 1 | 90.34％ |
| Example 2 | 93.36％ |
| Example 3 | 96.57％ |
| Example 4 | 96.79％ |
| Example 5 | 96.83％ |
From the comparison results in table 1, it can be found that the reflectivity of the silver layer increases with the increase in the thickness of the silver layer, but even if the thickness of the silver layer is increased, the effect on the increase in the reflectivity at 550nm is small as in examples 3, 4 and 5, i.e., example 3 has started to reach a relatively good value.
TABLE 2 results of detection of the Main Performance of reflective films provided in examples 6-9
| Performance of | Reflectivity of black surface | Black flour taste | Adhesion force | Contact angle of water |
| Example 6 | 10.28％ | Bright and black | 60/100 | 104.23° |
| Example 7 | 12.32％ | Bright and black | 90/100 | 104.34° |
| Example 8 | 15.67％ | Bright and black | 100/100 | 104.35° |
| Example 9 | 21.98％ | Super bright black | 100/100 | 104.29° |
From the comparison results in table 2, it can be seen that the reflectivity, taste, and adhesion of the ink layer of the black surface are closely related to the thickness of the Al layer, and the reflectivity of the black surface gradually increases with the thickness of the Al layer, while the adhesion also increases with the thickness of the Al layer. However, the silver black product is preferred to the commercial customers in terms of taste, and the lower the reflectance is, the better the black reflectance is. In examples 6-9, the water contact angle was substantially the same regardless of the thickness of the Al layer. Therefore, in the above examples 8 and 9, the Al layer in example 8 reached a more preferable value in the case where the adhesion reached the standard.
TABLE 3 results of detection of the Main Performance of reflective films provided in example 8, examples 10-12
From the comparison results in table 3, it can be found that the number of printing times of the ink layer, namely the thickness of the coating, has a direct relation with the black surface reflectivity, taste and water contact angle of the material, and when the number of printing times is 2 or 3, the black surface reflectivity changes greatly, the taste aspect still belongs to bright black, the nature of metallic color is reflected, when the number of printing times is 4, the black surface reflectivity reaches 4.16%, the overall taste is matt black, the water contact angle also reaches 107.24 degrees, the number of printing times is further increased, and the performance improvement space is not large.
TABLE 4 results of primary Performance test of reflective films provided in example 11, examples 13-15
From the comparison results in Table 4, it can be seen that the choice of the thickness of the substrate layer in the silver black reflective film has substantially no effect on the reflectivity; for the influence of warping during production and off-line, the larger the warping degree during production and off-line, the less the warping degree is, and the change of the warping is basically different after the reliability, and is within a reasonable range (less than or equal to 3 mm). Examples 11 and 15 are relatively preferable in view of the variation of the current model concerning the thinning and the ease of processing.
TABLE 5 major aspects of the reflective films provided in example 15 and the high-gloss silver black reflective films provided in comparative examples 1-9
Performance test results
From the comparison results in table 5, comparative examples 1, 7 or 2, 8 or 3, 9 find that the silver layer has a stain-resistant hardened layer, so that the abrasion resistance between the reflective film and the light guide plate can be effectively improved, and the assembly yield of the material can be effectively improved. As can be seen from example 15 and comparative examples 4 to 9, the silver black reflective film provided by the present invention comprises a single substrate, and the warp and the post-reliability warp of the silver black reflective film provided by the present invention are superior to those of the composite highlight silver reflective film provided by comparative examples 4 to 9 when the silver black reflective film is taken off line; meanwhile, compared with an aluminized PET substrate, the white film substrate which is formed by stretching and shaping and contains barium sulfate is more difficult to control and control the warpage, the warpage is more serious after reliability, and the reflective film provided in the embodiment 15 is further improved in the subsequent assembly yield, and particularly in the machine type with high warpage requirement.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The reflecting film is characterized by sequentially comprising a hardening coating, a bottom coating, an oxygen-proof waterproof protective layer, an Ag layer, a base material layer, an Al layer and an ink layer; in the preparation process, the hardening coating is firstly prepared into coating liquid; the coating liquid of the hardening coating comprises 30 parts by weight of a six-functional polyurethane acrylic resin prepolymer, 18 parts by weight of a three-functional polyurethane acrylic resin prepolymer, 12 parts by weight of a three-functional acrylate monomer, 3.6 parts by weight of a photoinitiator, 0.3 part by weight of a fluorine auxiliary agent and 40 parts by weight of an organic solvent; the thickness of the Ag layer is 30-80nm, the thickness of the base material layer is 25-75 μm, the thickness of the Al layer is 0-60nm, and the thickness of the ink layer is 0.5-1.5 μm.
2. The reflective film of claim 1 wherein said primer layer is made of a material selected from the group consisting of acrylic or polyurethane, or a combination of both.
3. The reflective film of claim 1 wherein said oxygen-protective water-repellent protective layer is selected from the group consisting of acrylate polymers.
4. The reflective film of claim 1 wherein said Ag layer is prepared by physical vapor deposition.
5. A method of making the reflective film of any one of claims 1-4, comprising the steps of:
(1) Pretreating a high-transparency substrate, and then evaporating an Ag layer on one side of the substrate; the high-transparency substrate is PET;
(2) Coating an oxygen-proof waterproof protective layer on the surface of the Ag layer;
(3) Coating a layer of base coat on the surface of the anti-oxidation waterproof protective layer for coating a subsequent hardening liquid;
(4) Coating hardening liquid on the bottom coating, and curing to obtain a hardening coating;
(5) Evaporating an Al layer on the other surface of the PET;
(6) Coating a protective film on the surface of the hardening coating;
(7) Printing ink on the Al layer in a screen printing mode;
(8) And (5) splitting, packaging and discharging.
6. The method of producing a reflective film according to claim 5, wherein the number of silk-screen printing of the ink is 2 to 6.
7. The reflective film of claim 1 wherein the reflective film has a warp of 0-1mm during off-line production, a warp of 0-3mm after reliability, and a reflectance of > 96.0%.
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| CN109870753A (en) * | 2018-12-21 | 2019-06-11 | 宁波激智科技股份有限公司 | A kind of dirty silver-colored reflectance coating of the anti-finger of super bright high reliability |
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| JP2007086121A (en) * | 2005-09-20 | 2007-04-05 | Toray Ind Inc | Reflection film and its manufacturing method |
| CN101021644A (en) * | 2006-12-25 | 2007-08-22 | 长兴光学材料（苏州）有限公司 | Antiscraping optical film and use thereof |
| CN203117446U (en) * | 2012-12-17 | 2013-08-07 | Tcl显示科技（惠州）有限公司 | Reflective film and liquid crystal module employing same |
| CN105759329A (en) * | 2016-04-19 | 2016-07-13 | 深圳市宝祥宏科技有限公司 | Light-proof anti-fingerprint highlight black silver reflective film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007086121A (en) * | 2005-09-20 | 2007-04-05 | Toray Ind Inc | Reflection film and its manufacturing method |
| CN101021644A (en) * | 2006-12-25 | 2007-08-22 | 长兴光学材料（苏州）有限公司 | Antiscraping optical film and use thereof |
| CN203117446U (en) * | 2012-12-17 | 2013-08-07 | Tcl显示科技（惠州）有限公司 | Reflective film and liquid crystal module employing same |
| CN105759329A (en) * | 2016-04-19 | 2016-07-13 | 深圳市宝祥宏科技有限公司 | Light-proof anti-fingerprint highlight black silver reflective film |
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