CN116120615A - Diffusion film for refrigerator LED area light source - Google Patents

Diffusion film for refrigerator LED area light source Download PDF

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Publication number
CN116120615A
CN116120615A CN202211703692.7A CN202211703692A CN116120615A CN 116120615 A CN116120615 A CN 116120615A CN 202211703692 A CN202211703692 A CN 202211703692A CN 116120615 A CN116120615 A CN 116120615A
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Prior art keywords
coating
light source
diffusion film
agent
pet
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CN202211703692.7A
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Inventor
蒋天楠
马秋安
董路
陈裕意
薛洪恩
周群才
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Lucky Huaguang Graphics Co Ltd
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Lucky Huaguang Graphics Co Ltd
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Priority to CN202211703692.7A priority Critical patent/CN116120615A/en
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    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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    • 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
    • C09D133/00—Coating compositions 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; Coating compositions based on derivatives of such polymers
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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
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    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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    • C09D7/65—Additives macromolecular
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    • 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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    • C08J2433/00—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
    • 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
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    • C08J2433/00—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
    • 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
    • C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
    • 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
    • C08J2465/00—Characterised by the use of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Derivatives of such polymers
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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
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • 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
    • C08J2489/00—Characterised by the use of proteins; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/04—Antistatic

Abstract

The invention provides a diffusion film for a refrigerator LED area light source, which comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light rays; the coating liquid for forming the coating by coating and drying comprises, by weight, 0.5% -3% of gelatin, 0.2% -1% of nonionic surfactant, 0.1% -0.3% of emulsifying agent, 0.02% -0.08% of wetting agent, 8% -15% of adhesive, 1% -3% of antistatic agent, 0.05% -0.2% of matting agent and the balance of pure water. The manufacturing cost of the LED area light source of the refrigerator is reduced, and meanwhile, the performance required by the use of the area light source can be completely met.

Description

Diffusion film for refrigerator LED area light source
Technical Field
The invention relates to a diffusion film, in particular to a diffusion film for a refrigerator LED (light-emitting diode) area light source.
Background
At present, an LED area light source adopted by domestic refrigerator manufacturers is mainly used for converting an LED point light source into an area light source through an acrylic light guide plate. The light guide plate with the sub-gram force has the advantages that the cold and hot expansion coefficient is large, the use environment temperature cannot exceed 85 ℃, the environment with a large temperature difference needs to consider reserving a telescopic gap, and meanwhile, the light guide plate with the sub-gram force is high in price.
Disclosure of Invention
In order to solve the problems, the invention provides the diffusion film for the refrigerator LED area light source, which reduces the manufacturing cost of the refrigerator LED area light source and can completely meet the performance required by the use of the area light source.
The object of the invention is achieved in the following way: the diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for forming the coating by coating and drying comprises, by weight, 0.5% -3% of gelatin, 0.2% -1% of nonionic surfactant, 0.1% -0.3% of emulsifying agent, 0.02% -0.08% of wetting agent, 8% -15% of adhesive, 1% -3% of antistatic agent, 0.05% -0.2% of matting agent and the balance of pure water.
The thickness of the PET substrate is 170-190 microns, the light transmittance is 40-60%, the whiteness is 80-95%, and the haze is 85-92%.
The nonionic surfactant is a fluorosurfactant, a polyoxyethylene ester, or a polyol; the emulsifier is an anionic emulsifier; the wetting agent is sulfonate or fatty acid ester sulfate; the adhesive is modified acrylic ester or modified polyurethane; the antistatic agent is sodium alkyl sulfonate, thiophene, fatty alcohol, polyoxyethylene ether or phosphate, and the matting agent is silicon dioxide or polymethyl methacrylate.
The emulsifier is alkyl sulfate or alkyl benzene sulfonate.
The grain size of the matting agent is more than 10 um.
The grain size of the matting agent is 15-20um.
The coating liquid is subjected to large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100-150 ℃.
The thickness of the coating is 0.5-3.8um, and the surface resistance is 10 7 -10 9 Omega, roughness Ra is 5-10, light transmittance is 40% -60%, and haze is 85% -92%.
Compared with the prior art, the diffusion film for the refrigerator area light source adopts the PET porcelain white film added with the titanium white master batch, and a layer of environment-friendly aqueous coating liquid added with the large-particle matting agent is coated on the PET porcelain white film, and is subjected to primary coating and high-temperature drying. The PET has excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature resistance, low temperature resistance, chemical resistance, strong antistatic ability, oil resistance and water resistance. The diffusion film for the refrigerator area light source adopts continuous large-axis coating, and has great advantages compared with an acrylic light guide plate in cost.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The present invention will now be described in detail with reference to specific examples, which are given herein for further illustration only and are not to be construed as limiting the scope of the invention, since numerous insubstantial modifications and adaptations thereof will now occur to those skilled in the art in light of the foregoing disclosure.
As shown in fig. 1, the diffusion film for the refrigerator area light source comprises a PET substrate 1, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating 2 which plays a role in diffusing light; the coating liquid for forming the coating by coating and drying comprises, by weight, 0.5% -3% of gelatin, 0.2% -1% of nonionic surfactant, 0.1% -0.3% of emulsifying agent, 0.02% -0.08% of wetting agent, 8% -15% of adhesive, 1% -3% of antistatic agent, 0.05% -0.2% of matting agent and the balance of pure water.
The white pigment is titanium white filler, and can be titanium white master batch. The white porcelain film added with the white pigment can be PET white porcelain film.
The thickness of the PET substrate is 170-190 microns, the light transmittance is 40-60%, the whiteness is 80-95%, and the haze is 85-92%.
The nonionic surfactant is a fluorosurfactant, a polyoxyethylene ester, or a polyol; the emulsifier is an anionic emulsifier; the wetting agent is sulfonate or fatty acid ester sulfate; the adhesive is modified acrylic ester or modified polyurethane; the antistatic agent is sodium alkyl sulfonate, thiophene, fatty alcohol, polyoxyethylene ether or phosphate, and the matting agent is silicon dioxide or polymethyl methacrylate.
The emulsifier is alkyl sulfate or alkyl benzene sulfonate.
The grain size of the matting agent is more than 10 um.
The grain size of the matting agent is 15-20um. The coarse surface agent with the grain diameter in the range is selected, so that a larger gap is formed between the diffusion film and the light source panel, and the diffusion effect is more obvious.
The coating liquid is subjected to large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100-150 ℃.
The dry thickness of the coating is 0.5-3.8um, and the surface resistance is 10 7 -10 9 Omega, roughness Ra is 5-10, light transmittance is 40% -60%, and haze is 85% -92%.
The coating liquid is dried to form a diffusion coating, light enters from the back of the diffusion layer, is scattered by titanium dioxide in the substrate after passing through the porcelain white PET substrate, and is scattered by the matting agent particles in the diffusion layer to form a uniform surface light source. Meanwhile, the matting agent is transparent spherical organic glass beads, and part of light rays can be focused after passing through the spherical matting agent to enhance brightness.
Example 1
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 0.96% of gelatin, 0.5% of fluorocarbon surfactant, 0.15% of sodium dodecyl sulfate as an emulsifier, 0.05% of sodium dihexyl succinate sulfonate as a wetting agent, 15% of modified acrylate emulsion as an adhesive, 1.2% of polythiophene as an antistatic agent, 15um of polymethyl methacrylate particles as a rough surface agent, 0.12% of pure water as the rest. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 1.2um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
The diffusion film for a surface light source of a refrigerator prepared in example 1 has the following test properties
Figure 628826DEST_PATH_IMAGE001
Example 2
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 0.5% of gelatin, 0.2% of fluorocarbon surfactant, 0.1% of sodium dodecyl sulfate as an emulsifier, 0.02% of sodium dihexyl succinate sulfonate as a wetting agent, 8% of polyurethane emulsion as an adhesive, 1% of polythiophene as an antistatic agent, 15um of polymethyl methacrylate particles as a rough surface agent, 0.05% of pure water as the rest. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 0.9um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
The diffusion film for a refrigerator surface light source prepared in example 2 has the following test properties:
Figure DEST_PATH_IMAGE002
example 3
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 3% of gelatin, 1% of fluorocarbon surfactant, 0.3% of sodium dodecyl sulfate as an emulsifier, 0.08% of sodium dihexyl succinate sulfonate as a wetting agent, 15% of polyurethane emulsion as an adhesive, 3% of polythiophene as an antistatic agent, 15um polymethyl methacrylate particles as a rough surface agent, 0.2% of pure water as a rest. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 3.8um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
The diffusion film for a refrigerator surface light source prepared in example 3 has the following test properties:
Figure 106819DEST_PATH_IMAGE003
example 4
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 1.97% of gelatin, 0.6% of fluorocarbon surfactant, 0.15% of sodium dodecyl sulfate as an emulsifier, 0.05% of sodium dihexyl succinate sulfonate as a wetting agent, 11.7% of polyurethane emulsion as an adhesive, 1.5% of polythiophene as an antistatic agent, 15um of polymethyl methacrylate particles as a rough surface agent, 0.12% of pure water as the rest. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 2.3um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
The diffusion film for a refrigerator surface light source prepared in example 4 has the following test properties:
Figure DEST_PATH_IMAGE004
the diffusion film for a refrigerator surface light source may be the following examples:
example 5
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 1.25% of gelatin, 0.8% of fluorocarbon surfactant, 0.20% of sodium dodecyl benzene sulfonate as an emulsifier, 0.05% of sodium dihexyl succinate sulfonate as a wetting agent, 10.0% of polyurethane emulsion as an adhesive, 1.5% of polythiophene as an antistatic agent, 10um of polymethyl methacrylate particles as a rough surface agent, 0.12% of pure water as the rest. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 1.8um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
Example 6
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 1.80% of gelatin, 0.4% of fluorocarbon surfactant as nonionic surfactant, 0.25% of sodium dodecyl benzene sulfonate as emulsifier, 0.06% of sodium dihexyl succinate sulfonate as wetting agent, 12.5% of polyurethane emulsion as adhesive, 1.8% of polythiophene as antistatic agent, 20um of polymethyl methacrylate particles as matting agent, 0.10% of pure water as the rest. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 2.2um.
The PET film polyester support used in this example was a PET porcelain white film produced by Lekewa light printing technologies Co., ltd., thickness of 190. Mu.m.
Example 7
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 2.20% of gelatin, 0.5% of fluorocarbon surfactant, 0.13% of sodium dodecyl benzene sulfonate as an emulsifier, 0.03% of sodium dihexyl succinate sulfonate as a wetting agent, 11.5% of polyurethane emulsion as an adhesive, 2.8% of polythiophene as an antistatic agent, 18um of silicon dioxide as a rough surface agent, 0.12% of silicon dioxide as a rough surface agent, and the balance of pure water. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 2.4um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
Example 8
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form the coating comprises, by weight, 2.60% of gelatin, 0.5% of fluorocarbon surfactant, 0.15% of sodium dodecyl benzene sulfonate as an emulsifier, 0.05% of sodium dihexyl succinate sulfonate as a wetting agent, 10.5% of polyurethane emulsion as an adhesive, 1.2% of polythiophene as an antistatic agent, 12um of silicon dioxide as a rough surface agent, 0.08% of silicon dioxide as a rough surface agent, and the balance of pure water. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 2.8um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
Example 9
The diffusion film for the refrigerator area light source comprises a PET (polyethylene terephthalate) substrate, wherein the PET substrate is a porcelain white film added with white pigment, and the front surface of the PET substrate is coated with an environment-friendly water-based coating which plays a role in diffusing light; the coating liquid for coating and drying to form a coating comprises, by weight, 0.8% of gelatin, 0.88% of fatty alcohol polyoxyethylene ether as a nonionic surfactant, 0.18% of sodium dodecyl sulfate as an emulsifier, 0.06% of sodium dihexyl succinate sulfonate as a wetting agent, 12% of modified acrylate emulsion as an adhesive, 1.2% of polythiophene as an antistatic agent, 18um of polymethyl methacrylate particles as a rough surface agent, 0.08% of pure water as the rest. The coating liquid is used for carrying out large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100 ℃ to obtain a coating with a dry thickness of 1.1um.
The PET film polyester support in this example was a PET porcelain white film produced by Lekewa light printing technology Co., ltd., thickness of 188 μm.
In the embodiment of the application, the gelatin is bone gelatin of Sichuan Ruibao biotechnology Co., ltd; the nonionic surfactant is CF-600 of Jinan zifluoro New Material technology Co., ltd and AEO-9 of Jinan remote chemical Co., ltd; the emulsifier is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate of Tianjin far chemical reagent limited company; the wetting agent is MA-80 of Wu Hanhai mountain technology Co., ltd; the adhesive is polyurethane adhesive NS-310X or modified acrylic adhesive A-110F manufactured by Japanese high rosin Co; the antistatic agent is PEDOT/PSS manufactured by Anhui Kuer Biotechnology Co., ltd; the matting agent is PMMA particles produced by Guangdong guan Guangdong plasticizing Co, guangzhou, or silicon dioxide powder produced by Bowa nano technology Co.
While only the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it should be noted that equivalents and modifications, variations and improvements made according to the technical solution of the present invention and the inventive concept thereof, as well as those skilled in the art, should be considered as the scope of the present invention, without departing from the general inventive concept thereof.

Claims (8)

1. The utility model provides a diffusion barrier for refrigerator area light source, includes the PET substrate, and the PET substrate is the porcelain white film that has added white pigment, its characterized in that: the front surface of the PET substrate is coated with an environment-friendly water-based coating for diffusing light; the coating liquid for forming the coating by coating and drying comprises, by weight, 0.5% -3% of gelatin, 0.2% -1% of nonionic surfactant, 0.1% -0.3% of emulsifying agent, 0.02% -0.08% of wetting agent, 8% -15% of adhesive, 1% -3% of antistatic agent, 0.05% -0.2% of matting agent and the balance of pure water.
2. The diffusion film for a surface light source of a refrigerator according to claim 1, wherein: the thickness of the PET substrate is 170-190 microns, the light transmittance is 40-60%, the whiteness is 80-95%, and the haze is 85-92%.
3. The diffusion film for a surface light source of a refrigerator according to claim 1, wherein: the nonionic surfactant is a fluorosurfactant, a polyoxyethylene ester, or a polyol; the emulsifier is an anionic emulsifier; the wetting agent is sulfonate or fatty acid ester sulfate; the adhesive is modified acrylic ester or modified polyurethane; the antistatic agent is sodium alkyl sulfonate, thiophene, fatty alcohol, polyoxyethylene ether or phosphate, and the matting agent is silicon dioxide or polymethyl methacrylate.
4. The diffusion film for a surface light source of a refrigerator according to claim 3, wherein: the emulsifier is alkyl sulfate or alkyl benzene sulfonate.
5. The diffusion film for a surface light source of a refrigerator according to claim 1, wherein: the grain size of the matting agent is more than 10 um.
6. The diffusion film for a surface light source of a refrigerator according to claim 5, wherein: the grain size of the matting agent is 15-20um.
7. The diffusion film for a surface light source of a refrigerator according to claim 1, wherein: the coating liquid is subjected to large-axis continuous coating in an extrusion coating mode, and is dried at a high temperature of 100-150 ℃.
8. The diffusion film for a surface light source of a refrigerator according to claim 5, wherein: the thickness of the coating is 0.5-3.8um, and the surface resistance is 10 7 -10 9 Omega, roughness Ra is 5-10, light transmittance is 40% -60%, and haze is 85% -92%.
CN202211703692.7A 2022-12-29 2022-12-29 Diffusion film for refrigerator LED area light source Pending CN116120615A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006208993A (en) * 2005-01-31 2006-08-10 Toyobo Co Ltd Light diffusing film
KR20090073675A (en) * 2007-12-31 2009-07-03 주식회사 코오롱 Diffusion film
CN102778712A (en) * 2012-08-02 2012-11-14 昆山乐凯锦富光电科技有限公司 Optical diffusion barrier
CN103740251A (en) * 2013-12-17 2014-04-23 张家港康得新光电材料有限公司 High-adhesion aqueous coating liquid for optical polyester film
CN106526718A (en) * 2016-12-23 2017-03-22 合肥乐凯科技产业有限公司 Aqueous system anti-scratch diffusion film and backlight module used for liquid crystal display
CN111239868A (en) * 2020-02-11 2020-06-05 深圳市壹鑫光学电子有限公司 Diffusion film and manufacturing method thereof
CN112871602A (en) * 2020-12-08 2021-06-01 深圳市长松科技有限公司 Coating process and optical diffusion film
CN114835938A (en) * 2022-06-08 2022-08-02 乐凯医疗科技有限公司 Polyester film base for medical dry film and preparation method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006208993A (en) * 2005-01-31 2006-08-10 Toyobo Co Ltd Light diffusing film
KR20090073675A (en) * 2007-12-31 2009-07-03 주식회사 코오롱 Diffusion film
CN102778712A (en) * 2012-08-02 2012-11-14 昆山乐凯锦富光电科技有限公司 Optical diffusion barrier
CN103740251A (en) * 2013-12-17 2014-04-23 张家港康得新光电材料有限公司 High-adhesion aqueous coating liquid for optical polyester film
CN106526718A (en) * 2016-12-23 2017-03-22 合肥乐凯科技产业有限公司 Aqueous system anti-scratch diffusion film and backlight module used for liquid crystal display
CN111239868A (en) * 2020-02-11 2020-06-05 深圳市壹鑫光学电子有限公司 Diffusion film and manufacturing method thereof
CN112871602A (en) * 2020-12-08 2021-06-01 深圳市长松科技有限公司 Coating process and optical diffusion film
CN114835938A (en) * 2022-06-08 2022-08-02 乐凯医疗科技有限公司 Polyester film base for medical dry film and preparation method thereof

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