CN111116957A - Selective shading film and shading adhesive tape and preparation method thereof - Google Patents
Selective shading film and shading adhesive tape and preparation method thereof Download PDFInfo
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- CN111116957A CN111116957A CN201911411102.1A CN201911411102A CN111116957A CN 111116957 A CN111116957 A CN 111116957A CN 201911411102 A CN201911411102 A CN 201911411102A CN 111116957 A CN111116957 A CN 111116957A
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- C—CHEMISTRY; METALLURGY
- 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
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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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the 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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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- C—CHEMISTRY; METALLURGY
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
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Abstract
The invention discloses a light shielding film with selectivity, which is characterized in that: the shading film comprises a base material layer and a shading layer coated on one side of the base material layer, and the shading layer comprises the following raw materials in parts by mass: 50-60 parts of comprehensive blue printing ink, 20-30 parts of solvent, 0.5-1 part of lead acetate, 1-3 parts of manganese chloride and 5-10 parts of cadmium sulfide. The invention also discloses a shading tape adopting the shading film and a preparation method thereof. Compared with the prior art, the infrared remote sensing and unlocking device has the advantages that the shielding effect is realized on visible light, the selective transmission function is realized on infrared light with the wavelength of more than 760 nanometers, and the selectivity of the shading adhesive tape on light is given, so that the infrared remote sensing and unlocking functions of mobile phones and electronic products are realized.
Description
Technical Field
The invention relates to the technical field of shading tapes, in particular to a shading film with selectivity, a shading tape and a preparation method thereof.
Background
Generally, in the assembly of the liquid crystal display panel and the backlight module in the market, the light-shielding tape is usually attached to the edges of the liquid crystal display panel and the backlight module, so that the liquid crystal display panel and the backlight module are not easy to displace, thereby preventing friction between the liquid crystal display panel and the backlight module, avoiding scratching the optical film of the backlight module, and ensuring the display quality of the liquid crystal display panel. In addition, the shading adhesive tape can also shield redundant light emitted from the liquid crystal panel so as to prevent light leakage.
For example, a backlight module and a display device disclosed in the utility model patent with the patent application number CN201821779314.6 (publication number CN208834054U) belong to the technical field of display. The backlight module comprises a back plate, a light guide plate and an optical diaphragm; the light guide plate is arranged in the back plate; the optical diaphragm is arranged on one side of the light guide plate far away from the back plate, and the light guide plate is fixedly connected with the optical diaphragm; the orthographic projection of the optical film on the bottom plate of the back plate is positioned in the bottom plate.
But the shading adhesive tape on the market can shield the light of all wave bands. With the updating of mobile phone electronic products, infrared remote sensing and unlocking functions are designed on the market at present, and the shading adhesive tape is required to be capable of transmitting infrared light while shielding visible light. Therefore, it is necessary to develop an adhesive tape that can block visible light and transmit infrared light.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a light shielding film capable of shielding visible light and transmitting infrared light with a wavelength of more than 760nm, in view of the current state of the prior art.
The second technical problem to be solved by the present invention is to provide a method for preparing the light-shielding film.
The third technical problem to be solved by the present invention is to provide a light-shielding adhesive tape capable of shielding visible light and transmitting infrared light with a wavelength greater than 760 nm.
The fourth technical problem to be solved by the invention is to provide a preparation method of the shading tape.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a light-shielding film having selectivity, characterized in that: the shading film comprises a base material layer and a shading layer coated on one side of the base material layer, and the shading layer comprises the following raw materials in parts by mass:
preferably, the ink is produced by Sunday chemical company.
Preferably, the solvent is at least one of ethylene glycol monomethyl ether, acetone and toluene.
Preferably, the substrate layer is one of a black PET film, a black film with an ink layer on one side and a black film with an ink layer on both sides.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the preparation method of the light shielding film is characterized by comprising the following steps: adding lead acetate, manganese chloride, cadmium sulfide and a solvent into a flask according to the mass ratio, uniformly mixing, performing ultrasonic treatment at 80-90 ℃ for 20-40 min, performing magnetic stirring reaction for 0.5-1.5 h, cooling to room temperature, adding fully ground blue ink, emulsifying for 20-40 min by using an emulsifying machine, uniformly coating on a substrate layer, and drying to obtain the required light shielding film.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the shading adhesive tape with the shading film further comprises an adhesive layer coated on the shading film and a release layer for protecting the adhesive layer, wherein the adhesive layer is an acrylate adhesive, and the release layer is a release film.
Preferably, the acrylate adhesive comprises the following raw materials in parts by weight:
100 parts of copolymer formed by copolymerizing main monomer and functional monomer
20-30 parts of solvent
0.5-1.0 part of cross-linking agent.
Further, the main monomer is propyl acrylate, and the functional monomer is at least one of methyl methacrylate, n-butyl methacrylate and 2-hydroxyethyl acrylate; the solvent is at least one of ethyl acetate, toluene and butanone; the cross-linking agent is isocyanate cross-linking agent.
Still further, the copolymer formed by the copolymerization of the main monomer and the functional monomer is SK-1502D (produced by Sudoku chemical Co., Ltd.); the solvent is ethyl acetate; the crosslinking agent was Y-75 (available from Soken chemical Co., Ltd.).
The preparation method of the acrylate adhesive comprises the following steps: adding ethyl acetate into SK-1502D according to the mass portion ratio, stirring for 30 minutes, adding Y-75, and stirring for 20 minutes to obtain the required acrylate adhesive.
The technical scheme adopted by the invention for solving the fourth technical problem is as follows: the preparation method of the shading adhesive tape is characterized by comprising the following steps:
(1) uniformly coating the acrylate adhesive on a release film, drying at high temperature, attaching the acrylate adhesive to one side of the shading film, and rolling to obtain a first engineering product of the adhesive tape;
(2) and uniformly coating the acrylate adhesive on the other release film, drying at high temperature, laminating with the other surface of the first engineering product, and rolling to obtain the required shading adhesive tape.
Compared with the prior art, the invention has the advantages that: lead ions and manganese ions are doped into cadmium sulfide crystals by adding lead acetate and manganese chloride, so that the energy band structure of cadmium sulfide is changed, the cadmium sulfide can have a function of selectively transmitting light, the cadmium sulfide is emulsified with the lapel blue ink to prepare a light shielding film, the light shielding film has a shielding effect on visible light, the light shielding film has a function of selectively transmitting infrared light with the wavelength of more than 760 nanometers, the light shielding tape is endowed with the selectivity on light, and the infrared remote sensing and unlocking functions of mobile phones and electronic products are realized.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1:
the preparation method of the shading film comprises the following steps: adding 0.5 part of lead acetate, 1 part of manganese chloride, 5 parts of cadmium sulfide and 20 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 50 parts of synthetic blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 0.5 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Example 2:
the preparation method of the shading film comprises the following steps: adding 0.8 part of lead acetate, 2 parts of manganese chloride, 7 parts of cadmium sulfide and 25 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 55 parts of grinding blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 0.8 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Example 3:
the preparation method of the shading film comprises the following steps: adding 1 part of lead acetate, 3 parts of manganese chloride, 10 parts of cadmium sulfide and 25 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 60 parts of comprehensive grinding blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 1 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 1:
the preparation method of the shading film comprises the following steps: adding 0.5 part of lead acetate, 1 part of manganese chloride, 5 parts of cadmium sulfide and 25 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 40 parts of synthetic blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 0.8 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 2:
the preparation method of the shading film comprises the following steps: adding 1 part of lead acetate, 1 part of manganese chloride, 7 parts of cadmium sulfide and 25 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 70 parts of comprehensive grinding blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 1 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 3:
the preparation method of the shading film comprises the following steps: adding 0 part of lead acetate, 0 part of manganese chloride, 10 parts of cadmium sulfide and 30 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 55 parts of comprehensive grinding blue ink, emulsifying for 30min by using an emulsifying machine, then uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 30 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 0.7 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 4:
the preparation method of the shading film comprises the following steps: adding 0 part of lead acetate, 2 parts of manganese chloride, 10 parts of cadmium sulfide and 30 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 55 parts of comprehensive grinding blue ink, emulsifying for 30min by using an emulsifying machine, then uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 30 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 0.7 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 5:
the preparation method of the shading film comprises the following steps: adding 1 part of lead acetate, 0 part of manganese chloride, 8 parts of cadmium sulfide and 25 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 50 parts of comprehensive grinding blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 1 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 6:
the preparation method of the shading film comprises the following steps: adding 1 part of lead acetate, 2 parts of manganese chloride, 3 parts of cadmium sulfide and 25 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 50 parts of comprehensive grinding blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 0.8 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 7:
the preparation method of the shading film comprises the following steps: adding 1 part of lead acetate, 3 parts of manganese chloride, 15 parts of cadmium sulfide and 30 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 60 parts of comprehensive grinding blue ink, emulsifying for 30min by using an emulsifying machine, then uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 30 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 1 part of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
Comparative example 8:
the preparation method of the shading film comprises the following steps: adding 0.5 part of lead acetate, 2 parts of manganese chloride, 6 parts of cadmium sulfide and 25 parts of solvent (the mass ratio of ethylene glycol monomethyl ether to acetone to toluene is 3:1:1) into a flask, uniformly mixing, performing ultrasonic treatment at 85 ℃ for 30min, performing magnetic stirring reaction for 1h, then cooling to room temperature, adding 50 parts of synthetic blue ink, emulsifying for 30min by using an emulsifying machine, uniformly coating on a 12-micron PET film with the thickness of 2-12 microns, and drying at 110 ℃ for 2 min to obtain the required light shielding film.
The preparation method of the adhesive comprises the following steps: and adding 20 parts of ethyl acetate into 100 parts of SK-1502D, stirring for half an hour, finally adding 2 parts of Y-75, and stirring for 20 minutes to obtain the required adhesive.
Preparing the special shading adhesive tape: and uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, then attaching the adhesive composition to one surface of the prepared shading film, and rolling to obtain a first engineering product. And uniformly coating the prepared adhesive composition on a release film, wherein the thickness of the coated adhesive is 10-50 mu m, drying for 3 minutes by using a drying oven at 90 ℃, laminating with the prepared first engineering product, and rolling to obtain the required special light-shading adhesive tape.
The reaction conditions and the results of the performance test for all examples and comparative examples are shown in Table 1.
Note: in table 1, the test methods for various properties of the adhesive tape are as follows:
(1) visible light transmittance: cutting the adhesive tape into lengths: 50mm, width: a sample with the wavelength of 50mm is tested by an ARSV-916 spectrophotometer to test the transmittance of the sample with the wavelength of 760nm to 380 nm;
(2) infrared light transmittance: cutting the adhesive tape into lengths: 50mm, width: a sample with the thickness of 50mm is tested by an ARSV-916 spectrophotometer to test the transmittance with the wavelength of more than 760 nm;
(3) adhesive force: peeling off the release film of the non-test surface of the adhesive tape, covering with 25 mu mPE, cutting the adhesive tape into a sample with the width of 25mm, attaching the test surface to a mirror steel plate, rolling twice back and forth by using a 2kg roller, placing for 20 minutes at 23 ℃ under the environment of 50% humidity, peeling off by using an RTG-1210 universal tensile machine at 180 degrees, and testing the tensile force.
As can be seen from table 1:
(1) the shading adhesive tape in the embodiment of the invention has good functions of shading visible light and infrared transmission and good viscosity;
(2) it can be seen from examples 1 to 3 and comparative examples 1 to 2 that the transmittance of visible light can be reduced by appropriately increasing the amount of the trivia blue, and the transmittance of infrared light can be reduced by excessively increasing the amount of the trivia blue;
(3) as can be seen from the examples 1 to 3 and the comparative examples 3 to 5, the transmittance of cadmium sulfide to infrared light can be improved by adding a small amount of lead acetate and manganese chloride;
(4) as can be seen from examples 1 to 3 and comparative examples 6 to 7, the infrared transmittance of a proper amount of cadmium sulfide is improved, and the visible light transmittance is increased when the cadmium sulfide is excessive;
(5) it can be seen from examples 1 to 3 and comparative example 8 that a proper amount of the crosslinking agent can maintain the adhesive tape in a stable adhesive range, and that excessive amounts of the crosslinking agent can reduce the adhesive property.
The working principle of the invention is as follows: lead ions and manganese ions are doped into cadmium sulfide crystals by adding lead acetate and manganese chloride, so that the energy band structure of cadmium sulfide is changed, the cadmium sulfide can have a function of selectively transmitting light, the cadmium sulfide is emulsified with the lapel blue ink to prepare a light shielding film, the light shielding film has a shielding effect on visible light, the light shielding film has a function of selectively transmitting infrared light with the wavelength of more than 760 nanometers, the light shielding tape is endowed with the selectivity on light, and the infrared remote sensing and unlocking functions of mobile phones and electronic products are realized.
TABLE 1 reaction conditions and results of Performance testing of all examples
Claims (10)
1. A light-shielding film having selectivity, characterized in that: the shading film comprises a base material layer and a shading layer coated on one side of the base material layer, and the shading layer comprises the following raw materials in parts by mass:
2. the light-shielding film according to claim 1, wherein: the ink is produced by Sunday chemical company.
3. The light-shielding film according to claim 1, wherein: the solvent is at least one of ethylene glycol monomethyl ether, acetone and toluene.
4. The light-shielding film according to claim 1, wherein: the substrate layer is one of a black PET film, a black film with an ink layer on one side and a black film with an ink layer on two sides.
5. The method for producing a light-shielding film according to any one of claims 1 to 4, comprising the steps of: adding lead acetate, manganese chloride, cadmium sulfide and a solvent into a flask according to the mass ratio, uniformly mixing, performing ultrasonic treatment at 80-90 ℃ for 20-40 min, performing magnetic stirring reaction for 0.5-1.5 h, cooling to room temperature, adding fully ground blue ink, emulsifying for 20-40 min by using an emulsifying machine, uniformly coating on a substrate layer, and drying to obtain the required light shielding film.
6. A light-shielding tape comprising the light-shielding film according to any one of claims 1 to 4, further comprising a subbing layer coated on the light-shielding film and a release layer for protecting the subbing layer, wherein the subbing layer is an acrylate adhesive, and the release layer is a release film.
7. The light-shading adhesive tape according to claim 6, wherein the acrylate adhesive comprises the following raw materials in parts by weight:
100 parts of copolymer formed by copolymerizing main monomer and functional monomer
20-30 parts of solvent
0.5-1.0 part of cross-linking agent.
8. The light-shielding tape according to claim 7, wherein: the main monomer is propyl acrylate, and the functional monomer is at least one of methyl methacrylate, n-butyl methacrylate and 2-hydroxyethyl acrylate; the solvent is at least one of ethyl acetate, toluene and butanone; the cross-linking agent is isocyanate cross-linking agent.
9. The light-shielding tape according to claim 8, wherein: the copolymer formed by the copolymerization of the main monomer and the functional monomer is SK-1502D; the solvent is ethyl acetate; the cross-linking agent is Y-75.
10. A method for producing a light-shielding adhesive tape according to any one of claims 6 to 9, which comprises the steps of:
(1) uniformly coating the acrylate adhesive on a release film, drying at high temperature, attaching the acrylate adhesive to one side of the shading film, and rolling to obtain a first engineering product of the adhesive tape;
(2) and uniformly coating the acrylate adhesive on the other release film, drying at high temperature, laminating with the other surface of the first engineering product, and rolling to obtain the required shading adhesive tape.
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| CN201911411102.1A CN111116957A (en) | 2019-12-31 | 2019-12-31 | Selective shading film and shading adhesive tape and preparation method thereof |
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