CN117567926A - Antiglare coating liquid, antiglare film, and protective film - Google Patents

Abstract

The invention discloses an anti-glare coating liquid, an anti-glare film and a protective film. The anti-glare coating liquid includes: polyethylene glycol monomethyl ether resin: 5-30 parts by mass; photoinitiator: 1-5 parts by mass; dispersant: 1-5 parts by mass; alkali-treated silica particles: 2 ‑6 parts by mass: Solvent: 40‑60 parts by mass. The addition of alkali-treated silica particles to the anti-glare coating liquid can make the anti-glare coating liquid have better transmittance and higher external haze after coating, so that the anti-glare film has better anti-glare properties. Effect. Adding polyethylene glycol monomethyl ether resin to the anti-glare coating liquid can improve the adhesion between the anti-glare layer and the hardened layer of the anti-glare film, thereby improving the anti-reflective and anti-glare properties of the anti-glare film. In addition, the hardened layer also improves the scratch resistance of the anti-glare film, so that the protective film has the advantages of anti-glare, anti-reflection and wear resistance.

Description

Anti-glare coating fluid, anti-glare film and protective film

Technical field

The present invention relates to the field of films, and in particular to an anti-glare coating liquid, an anti-glare film and a protective film.

Background technique

Display screens are widely used in various fields. Due to the interference of external light, anti-reflective and anti-glare technologies are applied to LCD displays or touch panels to increase the diffuse reflection of visible light. Anti-glare film consists of three main components: light-scattering particles, adhesive resin and substrate. Similar to liquid crystal diffusers, light-scattering particles scatter incoming light through differences in refractive index between particles, air, or particles, and resin. Anti-glare films are prepared by coating a solution of light-scattering particles and a binding resin on a substrate. Existing anti-reflective films can be divided into dense anti-reflective films and porous anti-reflective films. The former includes single-layer films and multi-layer films. The single-layer anti-reflective film has a simple structure and is easy to prepare; however, the selection range of single-layer anti-reflective film materials is very small. At the same time, in order to pursue higher anti-glare performance, anti-glare films require more light-scattering particles, larger particle sizes, or thinner anti-glare coatings. In addition, the anti-glare layer is an organic layer and the anti-reflection layer is an inorganic layer, and the adhesion between the two is poor.

The information disclosed in this Background section is merely intended to enhance an understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art that is already known to a person of ordinary skill in the art.

Contents of the invention

The object of the present invention is to provide an anti-glare coating liquid, an anti-glare film and a protective film. The anti-glare coating liquid can improve the anti-glare performance of the anti-glare film and improve the adhesion between the layers of the anti-glare film.

In order to achieve the above object, embodiments of the present invention provide an anti-glare coating liquid, which includes: polyethylene glycol monomethyl ether resin: 5-30 parts by mass; photoinitiator: 1-5 parts by mass; dispersant : 1-5 parts by mass; alkali-treated silica particles: 2-6 parts by mass: solvent: 40-60 parts by mass.

In one or more embodiments of the present invention, polyethylene glycol resin is also included, and the total mass parts of the polyethylene glycol resin and polyethylene glycol monomethyl ether resin is not more than 30.

In one or more embodiments of the present invention, non-alkali-treated silica particles are also included, and the total mass parts of the non-alkali-treated silica particles and the alkali-treated silica particles are not greater than 6.

In one or more embodiments of the present invention, the solvent is selected from one or more of methyl ethyl ketone, propylene glycol methyl ether, methyl isobutyl ketone, isopropyl alcohol, ethyl acetate and toluene. .

In summary, the addition of alkali-treated silica particles to the anti-glare coating liquid makes the anti-glare coating liquid have better transmittance and higher external haze after coating, thereby making the anti-glare coating liquid Has better anti-glare effect. In addition, adding polyethylene glycol monomethyl ether resin to the anti-glare coating liquid can improve the adhesion between the anti-glare coating liquid and the inorganic layer.

Another embodiment of the present invention provides an anti-glare film, which includes: a base material layer, a hardened layer and an anti-glare layer. A hardened layer is provided on the base material layer; an anti-glare layer is coated on the side of the hardened layer away from the base material layer, and the anti-glare layer includes the above-mentioned anti-glare coating liquid.

In one or more embodiments of the present invention, the substrate layer is selected from one of PET, TAC and COP.

In one or more embodiments of the present invention, the thickness of the substrate layer ranges from 25 μm to 200 μm.

To sum up, the anti-glare layer of the anti-glare film is coated with the above-mentioned anti-glare coating liquid. The gap between the anti-glare layer and the hardened layer is due to the interaction between polyethylene glycol monomethyl ether resin and alkali-treated silica particles. function, thereby improving the adhesion between the anti-glare layer and the hardened layer. Secondly, adding a hardened layer between the anti-glare layer and the base material layer further increases the external haze of the anti-glare film and reduces the internal haze, thereby improving the anti-reflective and anti-glare performance of the anti-glare film. In addition, the hardened layer also improves the scratch resistance of the anti-glare film.

Another embodiment of the present invention provides a protective film, which includes: an anti-glare film, an anti-reflective layer and an anti-fouling layer. An anti-glare film includes the above-mentioned anti-glare film; an anti-reflective layer is provided on the anti-glare film; and an anti-fouling layer is provided on the side of the anti-reflective layer away from the anti-glare film.

In one or more embodiments of the present invention, the anti-reflection layer includes a plurality of low refractive index layers and a plurality of high refractive index layers that are alternately stacked.

In one or more embodiments of the present invention, the antifouling layer is a perfluoropolyether alkoxysilane compound coating layer, and the water droplet angle of the antifouling layer is greater than or equal to 110°.

Compared with the prior art, according to the embodiment of the present invention, the protective film is provided with an anti-glare film, an anti-reflective layer and an anti-fouling layer, thereby having good anti-glare and anti-reflective effects as well as good anti-fouling effects.

Description of the drawings

Figure 1 is a schematic diagram of an anti-glare film according to an embodiment of the present invention;

Figure 2 is a schematic diagram of a protective film according to an embodiment of the present invention;

Figure 3 is a schematic diagram of the specific structure of a protective film according to an embodiment of the present invention.

Explanation of main reference symbols:

1-anti-glare film, 11-substrate layer, 12-hardened layer, 13-anti-glare layer, 2-anti-reflective layer, 21-low refractive index layer, 22-high refractive index layer, 3-antifouling layer.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

Unless expressly stated otherwise, throughout the specification and claims, the term "comprises" or its variations such as "comprises" or "comprising" will be understood to include the stated elements or components, and to Other elements or other components are not excluded.

An anti-glare coating liquid according to a preferred embodiment of the present invention includes: polyethylene glycol monomethyl ether resin, photoinitiator, dispersant, alkali-treated silica particles and solvent. Among them, the mass parts of polyethylene glycol monomethyl ether resin are between 20-30; the mass parts of photoinitiator are between 1-5; the mass parts of dispersant are between 1-5; alkali treatment The mass parts of the silica particles are between 2-6; the mass parts of the solvent are between 40-60.

In the above embodiment, the addition of alkali-treated silica particles to the anti-glare coating liquid can make the anti-glare coating liquid have better transmittance and higher external haze after coating, thereby making the anti-glare coating Liquid cloth has better anti-glare effect. Secondly, adding polyethylene glycol monomethyl ether resin to the anti-glare coating liquid can prevent the adhesion between the anti-glare coating liquid and the inorganic layer. The alkali treatment includes: selecting an appropriate alkali solution, such as NaOH solution, adding silica particles into the alkali solution, and then stirring and controlling the time and temperature so that the surface of the silica particles is corroded and a "honeycomb"-shaped cavity is formed. Alkali treatment can increase the scattering of light by silica particles and increase the anti-glare effect.

In one embodiment, the components of the anti-glare coating liquid further include polyethylene glycol resin, wherein the total mass parts of polyethylene glycol resin and polyethylene glycol monomethyl ether resin is no more than 30. Further, in addition to alkali-treated silica particles, the anti-glare coating liquid also contains non-alkali-treated silica particles, and the total mass parts of non-alkali-treated silica particles and alkali-treated silica particles is not more than 6 .

In one embodiment, the solvent is selected from one or more of methyl ethyl ketone, propylene glycol methyl ether, methyl isobutyl ketone, isopropyl alcohol, ethyl acetate and toluene.

In this embodiment, the photoinitiator is selected from: photoinitiator 184 (1-hydroxycyclohexyl phenyl ketone), photoinitiator TPO (2,4,6-trimethylbenzoyl-diphenylphosphine oxide) ), one of photoinitiator 1173 (2-hydroxy-2-methyl-1-phenyl-1-propanone). Among them, the preferred photoinitiator is: photoinitiator 184.

In this embodiment, the dispersant is selected from: Kerper-602, Kerper-605, and Kerper-630 of the American Kerper Company, CFC-500HP, CFC-510, CFC-637, and CFC-604S of the French CFC Company, or Various. Among them, the preferred dispersant is: Kerper-630.

The anti-glare coating liquid will be further described below with reference to examples and comparative examples.

Example 1

Polyethylene glycol resin: 24 parts by mass; polyethylene glycol monomethyl ether resin: 6 parts by mass; photoinitiator: photoinitiator 184, 2 parts by mass; dispersant: Kerper-630, 3 parts by mass; alkali treatment 2 Silicon oxide particles: 3 parts by mass; non-alkali-treated silica particles: 3 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 2

Polyethylene glycol resin: 18 parts by mass; polyethylene glycol monomethyl ether resin: 12 parts by mass; photoinitiator: photoinitiator 174, 2 parts by mass; dispersant: Kerper-630, 3 parts by mass; alkali treatment 2 Silicon oxide particles: 3 parts by mass; non-alkali-treated silica particles: 3 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 3

Polyethylene glycol resin: 12 parts by mass; polyethylene glycol monomethyl ether resin: 18 parts by mass; photoinitiator: photoinitiator 184, 2 parts by mass; dispersant: Kerper-630, 3 parts by mass; alkali treatment 2 Silicon oxide particles: 3 parts by mass; non-alkali-treated silica particles: 3 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 4

Polyethylene glycol resin: 6 parts by mass; polyethylene glycol monomethyl ether resin: 24 parts by mass; photoinitiator: photoinitiator 184, 2 parts by mass; dispersant: Kerper-630, 3 parts by mass; alkali treatment 2 Silicon oxide particles: 3 parts by mass; non-alkali-treated silica particles: 3 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 5

Polyethylene glycol resin: 0 parts by mass; polyethylene glycol monomethyl ether resin: 30 parts by mass; photoinitiator: photoinitiator 184, 2 parts by mass; dispersant: Kerper-630, 3 parts by mass; alkali treatment 2 Silicon oxide particles: 3 parts by mass; non-alkali-treated silica particles: 3 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Comparative example 1

Polyethylene glycol resin: 30 parts by mass; Polyethylene glycol monomethyl ether resin: 0 parts by mass; Photoinitiator: Photoinitiator 184, 2 parts by mass; Dispersant: Kerper-630, 3 parts by mass; Alkali treatment 2 Silicon oxide particles: 3 parts by mass; non-alkali-treated silica particles: 3 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

The transmittance, adhesion, hardness and wear resistance of the anti-glare coating liquids of Examples 1-5 and Comparative Example 1 were tested. The test results are shown in Table 1.

Table 1 Relevant test results of Examples 1-5 and Comparative Example 1

transmittance total haze Hardness 750g Wear-resistant 1000g load-bearing Qianbaige Reflectivity Example 1 91.46 18.27 3H 25 times OK, 30 times NG 5B 4.29 Example 2 92.63 20.19 3H 50 times OK, 60 times NG 5B 4.34 Example 3 93.42 21.87 4H 50 times OK, 60 times NG 5B 4.41 Example 4 93.01 24.15 4H 50 times OK, 60 times NG 5B 4.36 Example 5 92.75 27.26 4H 50 times OK, 60 times NG 5B 4.30 Comparative example 1 91.28 16.30 2H 20 times OK, 30 times NG 5B 4.16

It can be seen from the test results of the above examples and comparative examples that the anti-glare coating liquid adds polyethylene glycol monomethyl ether resin and controls the ratio of polyethylene glycol resin and polyethylene glycol monomethyl ether resin, thereby improving the anti-glare coating liquid. Transmittance, adhesion, hardness and wear resistance of anti-glare coating fluid.

Example 6

Polyethylene glycol resin: 20 parts by mass; Polyethylene glycol monomethyl ether resin: 10 parts by mass; Photoinitiator: Photoinitiator 184, 2 parts by mass; Dispersant: Kerper-630, 3 parts by mass; Alkali treatment 2 Silicon oxide particles: 2 parts by mass; non-alkali-treated silica particles: 0 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 7

Polyethylene glycol resin: 20 parts by mass; Polyethylene glycol monomethyl ether resin: 10 parts by mass; Photoinitiator: Photoinitiator 184, 2 parts by mass; Dispersant: Kerper-630, 3 parts by mass; Alkali treatment 2 Silicon oxide particles: 4 parts by mass; non-alkali-treated silica particles: 0 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 8

Polyethylene glycol resin: 20 parts by mass; Polyethylene glycol monomethyl ether resin: 10 parts by mass; Photoinitiator: Photoinitiator 184, 2 parts by mass; Dispersant: Kerper-630, 3 parts by mass; Alkali treatment 2 Silicon oxide particles: 6 parts by mass; non-alkali-treated silica particles: 0 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 9

Polyethylene glycol resin: 20 parts by mass; Polyethylene glycol monomethyl ether resin: 10 parts by mass; Photoinitiator: Photoinitiator 184, 2 parts by mass; Dispersant: Kerper-630, 3 parts by mass; Alkali treatment 2 Silicon oxide particles: 4 parts by mass; non-alkali-treated silica particles: 2 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Example 10

Polyethylene glycol resin: 20 parts by mass; polyethylene glycol monomethyl ether resin: 10 parts by mass; photoinitiator: photoinitiator 184, 2 parts by mass, dispersant: Kerper-630, 3 parts by mass; alkali treatment 2 Silicon oxide particles: 2 parts by mass; non-alkali-treated silica particles: 4 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Comparative example 2

Polyethylene glycol resin: 20 parts by mass; polyethylene glycol monomethyl ether resin: 10 parts by mass, photoinitiator: photoinitiator 184, 2 parts by mass; dispersant: Kerper-630, 3 parts by mass; alkali treatment 2 Silicon oxide particles: 0 parts by mass; non-alkali-treated silica particles: 2 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Comparative example 3

Polyethylene glycol resin: 20 parts by mass; Polyethylene glycol monomethyl ether resin: 10 parts by mass; Photoinitiator: Photoinitiator 184, 2 parts by mass; Dispersant: Kerper-630, 3 parts by mass; Alkali treatment 2 Silicon oxide particles: 0 parts by mass; non-alkali-treated silica particles: 4 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

Comparative example 4

Polyethylene glycol resin: 20 parts by mass; Polyethylene glycol monomethyl ether resin: 10 parts by mass; Photoinitiator: Photoinitiator 184, 2 parts by mass; Dispersant: Kerper-630, 3 parts by mass; Alkali treatment 2 Silicon oxide particles: 0 parts by mass; non-alkali-treated silica particles: 6 parts by mass; solvent: methyl ethyl ketone, 50 parts by mass.

The transmittance and haze of the anti-glare coating liquids of Examples 6-10 and Comparative Examples 2-4 were tested. The test results are shown in Table 2.

Table 2 Relevant test results of Examples 6-10 and Comparative Examples 2-3

transmittance total haze Internal haze External haze External haze to internal haze ratio Example 6 90.26 21.98 11.21 10.77 0.96 Example 7 89.84 32.82 12.78 20.04 1.56 Example 8 88.59 44.98 10.87 34.11 3.14 Example 9 89.02 36.21 13.37 22.84 1.70 Example 10 89.53 26.30 12.24 14.06 1.15 Comparative example 2 91.56 16.30 13.22 3.08 0.23 Comparative example 3 91.05 25.27 19.58 5.69 0.29 Comparative example 4 90.33 33.41 24.61 7.8 0.32

It can be seen from the above Table 2 that by changing the ratio of alkali-treated silica particles and non-alkali-treated silica particles, the transmittance, total haze, internal haze, external haze and internal and external haze of the anti-glare coating liquid The ratio increases with the increase of alkali-treated silica particles, so that the anti-glare coating liquid has better anti-glare effect.

As shown in FIG. 1 , another embodiment of the present invention also provides an anti-glare film 1 , which includes a base material layer 11 , a hardened layer 12 and an anti-glare layer 13 .

The hardened layer 12 is provided on the base material layer 11 . The anti-glare layer 13 is coated on the side of the hardened layer 12 away from the base material layer 11 . Among them, the anti-glare layer 13 is the aforementioned anti-glare coating liquid.

The base material layer 11 is selected from one of PET, TAC and COP. The thickness of the base material layer 11 varies according to the type and performance of the optical device to which it is applied, and its thickness is usually between 25 μm and 200 μm.

The anti-glare layer 13 of the anti-glare film 1 is coated with the above-mentioned anti-glare coating liquid. The gap between the anti-glare layer 13 and the hardened layer 12 is due to the action of polyethylene glycol monomethyl ether resin and alkali-treated silica particles. , thereby improving the adhesion between the anti-glare layer 13 and the hardened layer 12 . Secondly, adding the hardened layer 12 between the anti-glare layer 13 and the base material layer 11 further increases the external haze of the anti-glare film 1 and reduces the internal haze, thereby improving the anti-reflective and anti-glare properties of the anti-glare film 1 . In addition, the hardened layer 12 also improves the scratch resistance of the anti-glare film 1 .

As shown in FIG. 2 , another embodiment of the present invention also provides a protective film, which includes an anti-glare film 1 , an anti-reflective layer 2 and an anti-fouling layer 3 .

The anti-glare film 1 includes the above-mentioned anti-glare film 1. The anti-reflective layer 2 is provided on the anti-glare film 1 . The anti-reflective layer 2 is disposed on the side of the anti-reflective layer 2 away from the anti-glare film 1 . The anti-reflection layer 2 includes a plurality of low refractive index layers 21 and a plurality of high refractive index layers 22 that are alternately stacked. Specifically, it is preferable to use Nb ₂ O ₅ or TiO ₂ as the dielectric in the high refractive index layer 22 . As the dielectric in the low refractive index layer, SiO ₂ is preferably used. As shown in FIG. 3 , the low refractive index layer 21 is provided with two layers, and the high refractive index layer 22 is also provided with two layers. Among them, the antifouling layer 3 is a perfluoropolyether alkoxysilane compound coating layer. The water droplet angle of the antifouling layer 3 is greater than or equal to 110°, so it has high hydrophobicity and can improve the antifouling property of the protective film.

In summary, as shown above, the protective film has good anti-glare and anti-reflective effects as well as good anti-fouling effects by being provided with an anti-glare film 1, an anti-reflective layer 2 and an anti-fouling layer 3. The protective film can be used for image display and input devices of smart phones and notebook computers and has good display effects.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and illustration. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application, thereby enabling others skilled in the art to make and utilize various exemplary embodiments of the invention and various different applications. Choice and change. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims (10)

1. An anti-glare coating liquid, characterized in that it includes: Polyethylene glycol monomethyl ether resin: 5-30 parts by mass; Photoinitiator: 1-5 parts by mass; Dispersant: 1-5 parts by mass; Alkali-treated silica particles: 2-6 parts by mass: and Solvent: 40-60 parts by mass. 2. The anti-glare coating liquid according to claim 1, further comprising a polyethylene glycol resin, the total mass parts of the polyethylene glycol resin and polyethylene glycol monomethyl ether resin being no more than 30 . 3. The anti-glare coating liquid according to claim 1, further comprising non-alkali-treated silica particles, and the total mass of the non-alkali-treated silica particles and the alkali-treated silica particles No more than 6 servings. 4. The anti-glare coating liquid according to claim 1, wherein the solvent is selected from the group consisting of methyl ethyl ketone, propylene glycol methyl ether, methyl isobutyl ketone, isopropyl alcohol, ethyl acetate and toluene. one or more of them. 5. An anti-glare film, characterized by comprising: base material layer; A hardened layer, disposed on the base material layer; and An anti-glare layer is coated on the side of the hardened layer away from the base material layer, and the anti-glare layer includes the anti-glare coating liquid according to any one of claims 1-4. 6. The anti-glare film according to claim 5, wherein the base material layer is selected from one of PET, TAC and COP. 7. The anti-glare film according to claim 5, wherein the thickness of the base material layer is between 25 μm and 200 μm. 8. A protective film, characterized in that it includes: Anti-glare film, including the anti-glare film according to any one of claims 5-7; An anti-reflective layer disposed on the anti-glare film; and An antifouling layer is provided on the side of the anti-reflective layer away from the anti-glare film. 9. The protective film according to claim 8, wherein the anti-reflection layer includes a plurality of low refractive index layers and a plurality of high refractive index layers that are alternately stacked. 10. The protective film according to claim 8, wherein the antifouling layer is a perfluoropolyether alkoxysilane compound coating layer, and the water droplet angle of the antifouling layer is greater than or equal to 110°.