CN106633149B - Soft touch hardening film - Google Patents
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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
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
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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
- 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
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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
- C09D7/47—Levelling agents
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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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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- 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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- 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
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention relates to a soft touch hardened film, which comprises a transparent support body, wherein a hand feeling layer with the thickness of 10-30 mu m and a frosting layer with the thickness of 0.5-3 mu m are sequentially arranged on one optical surface of the transparent support body, the hand feeling layer and the frosting layer are formed by ultraviolet curing coating liquid, and the coating liquid comprises the following components in parts by weight: 15 to 45 weight portions of UV elastic resin, 0.5 to 5 weight portions of photoinitiator, 0.01 to 0.5 weight portion of flatting agent and 20 to 75 weight portions of organic solvent. According to the invention, through the double-layer structure, the hardened film with both smoothness and elasticity can be obtained, and the hardened film can be widely applied to the field of screen protection and the field of in-mold decoration.
Description
Technical Field
The invention belongs to the field of optical films, and particularly relates to a soft touch hardening film.
Background
With the popularization of tablet computers and large-screen smart phones, the hardened film is widely used in various fields. The hardening film is adhered to the surface of the screen, so that the scratch-proof effect is achieved; the hardened film is injected into the shell of a tablet computer, a mobile phone or a notebook computer and can also play a role in preventing scratches. The hardness of the surface of the hardened film is generally over 2H, and the hardness is very high, which causes a problem. The hardened film is pasted on the screen, only has the function of scratch prevention, but cannot prevent the screen from being cracked; the hardened film is used for the shell of electronic products, and the surface is hard, so that the hand feeling is influenced. It is the current art to address these problems with soft touch stiffening films.
In the prior art, a soft touch hardening film is composed of an elastic resin and particles. The elastic resin provides the elastic hand feeling of the soft touch hardening film, and the particles ensure the smooth performance and the rolling performance of the soft touch hardening film. The larger the thickness of the elastic resin is, the better the elasticity of the cured film is. However, in order to ensure the smoothness of the cured film, the thicker the elastic resin is, the more particles need to be added, which causes a decrease in the light transmittance of the cured film, and affects the visual effect.
Disclosure of Invention
The invention aims to solve the technical problem of providing a soft touch hardening film aiming at the defects in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a soft touch hardened film comprises a transparent support, wherein a hand feeling layer with the thickness of 10-30 microns and a frosted layer with the thickness of 0.5-3 microns are sequentially arranged on one optical surface of the transparent support, the hand feeling layer and the frosted layer are formed by ultraviolet curing coating liquid, and the coating liquid comprises the following components in parts by weight: 15 to 45 weight portions of UV elastic resin, 0.5 to 5 weight portions of photoinitiator, 0.01 to 0.5 weight portion of flatting agent and 20 to 75 weight portions of organic solvent. And smooth particles having a particle diameter of 1 to 5 μm are dispersed in the coating liquid for forming the frosted layer.
The soft touch hardened film contains 9 to 36 parts by weight of the smooth particles in the coating liquid.
In the soft touch hardening film, the UV elastic resin is a linear urethane acrylate.
The leveling agent in the hand feeling layer coating liquid is an acrylate leveling agent; the leveling agent in the coating liquid of the frosting layer is an organic silicon leveling agent.
The soft touch hardened film is characterized in that the smooth particles are selected from nano silica, alumina, titanium dioxide, zirconia, polymethyl methacrylate particles or a composition of the nano silica, the alumina, the titanium dioxide, the zirconia and the polymethyl methacrylate particles.
The soft touch hardening film has a thickness of 25 to 250 [ mu ] m.
The invention has the beneficial effects that: the invention adopts a double-layer structure, the hand feeling layer is very thick, and the particles are not contained, so that the elasticity of the hardened film can be improved; the frosted layer is very thin, the influence of the added smooth particles on the light transmittance is small, and the light transmittance is high while the smooth hand feeling is ensured; according to the invention, the hand feeling layer and the frosted layer are matched, so that the hardened film with both elastic and smooth hand feeling can be realized.
The invention can be widely applied to the field of screen protection and the field of in-mold decoration.
Drawings
FIG. 1 is a schematic view of the layer structure of the present invention.
In the drawings, the reference numerals denote: 1. a transparent support; 2. hand feeling layer, 3, frosting layer, 4, smooth particles.
Detailed Description
In order to achieve elastic hand feeling, the hand feeling layer and the frosting layer both use UV elastic resin, and the thickness of the hand feeling layer is controlled to be 10-30 mu m. In order to achieve smooth hand feeling and good light transmittance, the thickness of the frosted layer is controlled to be 0.5-3 μm. The UV elastic resin is linear polyurethane acrylate, polyurethane elastomer modified polyester resin or hydroxyl-containing linear polyester resin. Linear urethane acrylates are preferred.
In the invention, the smooth particles play a role in smooth hand feeling and adhesion prevention in the frosting layer, and the smooth particles suitable for the invention can be commercially available silicon dioxide, aluminum oxide, titanium dioxide, zirconium oxide, polymethyl acrylate, polycarbonate, polystyrene, polyurethane, polybutyl acrylate and the like. More preferably silica, alumina, titania, zirconia, polymethyl methacrylate. The particle size of the smooth particles is selected from 1-5 μm. The amount of the slipping particles in the coating liquid is 20 to 50 parts by weight.
In the present invention, the photoinitiator is a raw material commonly used in the art, and the photoinitiator suitable for the present invention includes two major types of radical polymerization photoinitiators and cationic polymerization photoinitiators. Exemplary photoinitiators are: radical polymerization photoinitiator: 2-hydroxy-methylphenylpropan-1-one (1173), 1-hydroxycyclohexylphenylketone (184), 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone (907), benzoin dimethyl ether (651), 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide (TPO), xylene ketone (BP), 2-Isopropylthioxanthone (ITX), and the like; cationic polymerization photoinitiator: diaryliodonium salts, triaryliodonium salts, alkyliodonium salts, cumeneferrocenium hexafluorophosphate, and the like. Free radical polymerization photoinitiators, such as 2-hydroxy-methylphenylpropane-1-one (1173) and 1-hydroxycyclohexylphenylketone (184), are preferred in the present invention. The photoinitiator is preferably 0.5 to 5 parts by weight. These light curing agents may be used alone, or 2 or more of them may be used in combination.
In the present invention, in order to improve the flatness of the coating layer, the coating liquid contains a leveling agent, and the leveling agent suitable for the present invention may be selected from commercially available organic siloxane or acrylic leveling agents, and in order to enable good spreading of the frosted layer on the handle layer, an acrylic leveling agent is used in the handle layer, such as: BYK-350, BYK-354, BYK-355, BYK-3560, BYK-358N, BYK-392, BYK-394, Levaslip-835, Levaslip-495 and Levaslip-837; and the frosted layer uses an organic silicon leveling agent. Such as: BYK-300, BYK-302, BYK-306, BYK-307, BYK-310, BYK-315, BYK-320, BYK-325, BYK-330, BYK-331, BYK-333, BYK-377, BYK-378, Tech-206, Tech-225, Tech-226, Tego-410, Tego-2100, Tego-420, Tego-415, Levaslip-836, Levaslip-466, Levaslip-435, DC-54 and DC-57. The amount of the leveling agent is preferably 0.01 to 0.5 part by weight.
The coating composition of the present invention may further contain an organic solvent as needed, and a conventional organic solvent may be used without any limitation as long as it can form the hand layer and the frosted layer of the present invention on the substrate, for example: aliphatic hydrocarbons such as hexane, heptane and cyclohexane; aromatic hydrocarbons such as toluene and xylene; halogenated hydrocarbons such as dichloromethane and dichloroethane; alcohols such as methanol, ethanol, propanol and butanol; ketones such as acetone, butanone, methyl ethyl ketone, 2-pentanone, and isophorone; esters such as ethyl acetate and butyl acetate. The organic solvent may be used alone or in combination of two or more.
In the present invention, the handle layer is formed by coating the coating composition on the transparent base material and curing it by Ultraviolet (UV) light, and the coating layer may be formed by a conventional method such as a bar coating method, a doctor blade coating method, a Mayer bar coating method, a roll coating method, a blade coating method, a slit coating method, and a micro gravure coating method. Slot and microgravure coating methods are preferred.
The ultraviolet ray as the ultraviolet ray for curing the resin in the coating liquid of the present invention can be obtained from a high-pressure mercury lamp, fusion H lamp or xenon lamp, and usually, the light amount for irradiation is 100mJ/cm2～500mJ/cm2In the range of (1), preferably 300mJ/cm2～500mJ/cm2The range of (1).
The transparent support of the present invention is preferably a plastic film, and examples of the plastic film include: examples of the polyester film include polyethylene terephthalate (PET), polycarbonate film (PC), polymethyl methacrylate film (PMMA), a composite film of ABS and PET, a composite film of PC and PMMA, and the like, and polyethylene terephthalate (PET) is preferable. The thickness of the support is not particularly limited. The thickness is generally in the range of 20 μm to 300 μm, preferably 25 μm to 250 μm.
The present invention will be further described with reference to the following drawings and examples, but the scope of the present invention is not limited to the following examples.
Example 1
1. Preparation of coating liquid for hand feeling layer
45 g of UV elastic resin DR-U029-1[ Changxing chemical ], 5 g of photoinitiator 184[ Tianjin Tianjiao chemical Co., Ltd ], 0.5 g of leveling agent BYK-350[ birk ] and 20 g of methyl ethyl ketone are added into a container and stirred to obtain a coating composition for later use.
2. Preparing a frosting layer coating liquid:
15 g of UV elastic resin DR-U029-1[ Changxing chemical ], 0.5 g of photoinitiator 184[ Tianjin Tianjiao chemical Co., Ltd ], 0.01 g of leveling agent BYK-300[ birk ], 9 g of silica particles with the particle size of 1 μm [ Degussa ] and 75 g of methyl ethyl ketone are added into a container, and the mixture is stirred to obtain a coating composition for later use.
3. Preparation of Soft touch hardened film
A polyethylene terephthalate film having a thickness of 25 μm [ PG 52; le Kai]Coating a hand feeling layer coating liquid on one optical surface of the substrate, drying the formed coating layer at 80 ℃ for 2min, and coating at 300mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a handle layer having a thickness of 30 μm.
Coating a frosting layer coating liquid on the hand feeling layer, drying the formed coating layer at 80 ℃ for 2min, and then drying at 500mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a frosted layer having a thickness of 0.5 μm, thereby obtaining a soft touch hardened film.
Example 2
1. Preparation of coating liquid for hand feeling layer
37.5 g of UV elastic resin CWD-52[ Brillouin International ], 3.6 g of photoinitiator TPO [ Tianjin Tianjiao chemical Co., Ltd ], 0.3 g of leveling agent BYK-3560[ bir ], and 30 g of ethyl acetate are added into a container and stirred to obtain the coating composition for later use.
2. Preparing a frosting layer coating liquid:
22.5 g of UV elastic resin CWD-52[ Brillouin International ], 1.3 g of photoinitiator TPO [ Tianjin Tianjiao chemical Co., Ltd ], 0.13 g of leveling agent BYK-331[ Big ], 15 g of PMMA particles with the particle size of 2 mu m [ ponding chemistry ] and 67 g of ethyl acetate are added into a container and stirred to obtain the coating composition for later use.
3. Preparation of Soft touch hardened film
A polyethylene terephthalate film having a thickness of 75 μm [ PG 52; le Kai]Coating a hand feeling layer coating liquid on one optical surface of the substrate, drying the formed coating layer at 80 ℃ for 2min, and coating at 300mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a handle layer having a thickness of 25 μm.
Coating a frosting layer coating liquid on the hand feeling layer, drying the formed coating layer at 80 ℃ for 2min, and then drying at 500mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a frosted layer having a thickness of 1.1 μm, thereby obtaining a soft touch hardened film.
Example 3
1. Preparation of coating liquid for hand feeling layer
30 g of UV elastic resin K-JA1553[ Del chemical ], 2.25 g of photoinitiator 1173[ Tianjin Tianjiao chemical Co., Ltd ], 0.25 g of leveling agent BYK-394[ bike ], and 40 g of toluene are added into a container, and stirred to obtain a coating composition for later use.
2. Preparing a frosting layer coating liquid:
30 g of UV elastic resin K-JA1553[ Delaware chemical ], 2.25 g of photoinitiator 1173[ Tianjin Tianjiao chemical Co., Ltd ], 0.25 g of leveling agent Tech-206[ tag ], 22.5 g of titanium dioxide with the particle size of 3 mu m [ Shanghai Jianghu Kogyo ] and 60 g of toluene are added into a container, and stirred to obtain a coating composition for later use.
3. Preparation of Soft touch hardened film
A polyethylene terephthalate film having a thickness of 125 μm [ PG 52; le Kai]Coating a hand feeling layer coating liquid on one optical surface of the substrate, drying the formed coating layer at 80 ℃ for 2min, and coating at 300mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a handle layer having a thickness of 20 μm.
Coating a frosting layer coating liquid on the hand feeling layer, drying the formed coating layer at 80 ℃ for 2min, and then drying at 500mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a frosted layer having a thickness of 1.75 μm, thereby obtaining a soft touch hardened film.
Example 4
1. Preparation of coating liquid for hand feeling layer
22.5 g of UV elastic resin ZHU-1785-PI [ DIC ], 1.3 g of photoinitiator 907[ Tianjin Tianjiao chemical Co., Ltd ], 0.13 g of leveling agent Levaslip-835[ D.E ], 50 g of ethanol are added into a container, and the mixture is stirred to obtain the coating composition for later use.
2. Preparing a frosting layer coating liquid:
37.5 g of UV elastic resin ZHU-1785-PI [ DIC ], 3.6 g of photoinitiator 907[ Tianjin Tianjiao chemical Co., Ltd ], 0.3 g of leveling agent Tego-2100[ digao ], 29 g of alumina particles with a particle size of 4 μm [ Degussa ] and 55 g of ethanol are added into a container, and stirred to obtain a coating composition for later use.
3. Preparation of Soft touch hardened film
Parylene at a thickness of 188 μmEthylene formate films [ PG 52; le Kai]Coating a hand feeling layer coating liquid on one optical surface of the substrate, drying the formed coating layer at 80 ℃ for 2min, and coating at 300mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a hand layer having a thickness of 15 μm.
Coating a frosting layer coating liquid on the hand feeling layer, drying the formed coating layer at 80 ℃ for 2min, and then drying at 500mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a frosted layer having a thickness of 2.6 μm, thereby obtaining a soft touch hardened film.
Example 5
1. Preparation of coating liquid for hand feeling layer
15 g of UV elastic resin W2513[ five elements of Guangzhou ], 0.5 g of photoinitiator 184[ Tianjin Tianjiao chemical Co., Ltd ], 0.01 g of leveling agent Levaslip-837[ D.modest ] and 60 g of isopropanol are added into a container and stirred to obtain the coating composition for later use.
2. Preparing a frosting layer coating liquid:
45 g of UV elastic resin W2513[ five elements of Guangzhou ], 5 g of photoinitiator 184[ Tianjin Tianjiao chemical Co., Ltd ], 0.5 g of leveling agent Levaslip-435[ modet ], 36 g of zirconium oxide with the particle size of 5 mu m [ Hubei Guizu zirconium Co., Ltd ] and 50 g of isopropanol were added into a container, and stirred to obtain a coating composition for later use.
3. Preparation of Soft touch hardened film
A polyethylene terephthalate film having a thickness of 250 μm [ PG 52; le Kai]Coating a hand feeling layer coating liquid on one optical surface of the substrate, drying the formed coating layer at 80 ℃ for 2min, and coating at 300mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a handle layer having a thickness of 10 μm.
Coating a frosting layer coating liquid on the hand feeling layer, drying the formed coating layer at 80 ℃ for 2min, and then drying at 500mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a frosted layer having a thickness of 3 μm, thereby obtaining a soft touch hardened film.
Comparative example 1
1. Preparing a frosting layer coating liquid:
45 g of UV elastic resin W2513[ five elements of Guangzhou ], 5 g of photoinitiator 184[ Tianjin Tianjiao chemical Co., Ltd ], 0.5 g of leveling agent Levaslip-435[ modet ], 36 g of zirconium oxide with the particle size of 5 mu m [ Hubei Guizu zirconium Co., Ltd ] and 50 g of isopropanol were added into a container, and stirred to obtain a coating composition for later use.
2. Preparation of Soft touch hardened film
A polyethylene terephthalate film having a thickness of 250 μm [ PG 52; le Kai]Coating the coating liquid on one optical surface of the optical member, drying the formed coating layer at 80 ℃ for 2min, and coating at 500mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a frosted layer having a thickness of 3 μm, thereby obtaining a soft touch hardened film. In contrast to example 5, the film was coated directly with a frosted layer and not with a handle layer.
Comparative example 2
1. Preparation of coating liquid for hand feeling layer
45 g of UV elastic resin DR-U029-1[ Changxing chemical ], 5 g of photoinitiator 184[ Tianjin Tianjiao chemical Co., Ltd ], 0.5 g of leveling agent BYK-350[ birk ] and 20 g of methyl ethyl ketone are added into a container and stirred to obtain a coating composition for later use.
2. Preparation of Soft touch hardened film
In the thicknessA 25 μm polyethylene terephthalate film [ PG 52; le Kai]Coating a hand feeling layer coating liquid on one optical surface of the substrate, drying the formed coating layer at 80 ℃ for 2min, and coating at 300mJ/cm2The dried coating layer was cured by ultraviolet irradiation to form a hand layer having a thickness of 30 μm, thereby obtaining a soft touch hardened film. In contrast to example 1, the film was coated with a handle layer and not with a sanding layer.
Table 1: test data sheet for each example
The test methods for the properties in the table are as follows:
(1) thickness measurement
An interferometric film thickness instrument tester [ united states FILMETRICS; the model is as follows: F20-UV ] measurement of hand and frosted layer thickness.
(2) Testing elastic hand feeling and smooth hand feeling:
the method comprises the steps of taking 1 hardened film, randomly selecting 10 persons, enabling the persons to touch the surface of the hardened film, and sensing the elastic hand feeling and the smooth hand feeling of the hardened film, wherein the marks with good hand feeling are '○', the marks with poor hand feeling are 'x', the marks with uncertain numbers are '△', counting the number of the marks, and the mark with the largest number is marked as the hand feeling mark of the hardened film.
(3) Light transmittance test
A light transmittance haze meter [ japan electric color company; the model is as follows: NDH2000N ] measurement of light transmittance.
Claims (3)
1. A soft touch hardened film, comprising a transparent support (1), on one optical surface of which a hand feeling layer (2) and a frosted layer (3) are sequentially arranged, characterized in that the thickness of the hand feeling layer (2) is 10 to 30 μm, and the thickness of the frosted layer (3) is 0.5 to 3 μm; the hand feeling layer and the frosting layer are formed by ultraviolet curing of coating liquid, and the components and parts by weight of the hand feeling layer coating liquid and the frosting layer coating liquid are as follows:
15 to 45 parts by weight of UV elastic resin,
0.5 to 5 parts by weight of a photoinitiator,
0.01 to 0.5 weight portion of flatting agent,
20 to 75 weight portions of organic solvent
Smooth particles (4) with the particle diameter of 1-5 mu m are dispersed in the frosting layer coating liquid; the smooth particles are one or more of silicon dioxide, alumina, titanium dioxide, zirconia and polymethyl methacrylate particles; the weight part of the smooth particles (4) in the frosting layer coating liquid is 9-36 parts;
the UV elastic resin is linear polyurethane acrylate, polyurethane elastomer modified polyester resin or hydroxyl-containing linear polyester resin;
the soft touch hardening film is prepared by the following steps:
coating a hand feeling layer coating liquid, drying the formed coating at the temperature of 80 ℃ for 2min, and curing the dried coating through ultraviolet irradiation to form a hand feeling layer;
and (3) coating a frosted layer coating liquid on the hand feeling layer, drying the formed coating layer at the temperature of 80 ℃ for 2min, and curing the dried coating layer through ultraviolet irradiation to obtain the soft touch hardening film.
2. The soft touch hardening film according to claim 1, wherein the leveling agent in the handle layer coating liquid is an acrylate leveling agent; and the leveling agent in the coating liquid of the frosting layer is an organic silicon leveling agent.
3. The soft touch stiffening membrane of claim 2, wherein the transparent support is 25 μm to 250 μm thick.
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| CN108976886A (en) * | 2018-06-15 | 2018-12-11 | 昆山三景科技股份有限公司 | A kind of skin sense UV hardening bath and preparation method thereof and application method |
| CN111235960A (en) * | 2020-01-20 | 2020-06-05 | 烟台博源科技材料股份有限公司 | Radiation curing transfer polishing abrasive paper and preparation method thereof |
| CN111270560A (en) * | 2020-01-20 | 2020-06-12 | 烟台博源科技材料股份有限公司 | Film-coated radiation-cured glossy abrasive paper and preparation method thereof |
| CN111455729B (en) * | 2020-04-28 | 2022-04-01 | 安徽集友新材料股份有限公司 | Hand-feeling type packaging paper and preparation method thereof |
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| JPH04114932A (en) * | 1990-08-31 | 1992-04-15 | Honny Chem Ind Co Ltd | Coating composition for glass |
| CN103540183A (en) * | 2013-10-27 | 2014-01-29 | 合肥乐凯科技产业有限公司 | Anti-fingerprint transparent hardening film for touch screen |
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| CN106633149A (en) | 2017-05-10 |
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