KR101867994B1 - Hard Coating Film Having High Hardness And Method For Producing The Same - Google Patents

Abstract

A hard hard coating film and a manufacturing method thereof are disclosed. According to an embodiment of the present invention, there is provided a method of producing a hard hard coating film, comprising the steps of: preparing a hard reinforcing material, which is selected from glass-fiber and glass-bead, Preparing a high hardness hard coating resin by adhering to a Urethane Acrylate Oligomer to prepare a hard hard coating resin; And a hard hard coating layer forming step of forming a hard hard coating layer by providing a hard hard hard coating resin on a hard hard coating base film constituting the base of the hard hard coating film.

Description

Technical Field [0001] The present invention relates to a high hardness hard coating film,

The present invention relates to a hard hard coating film and a method for producing the hard hard coating film, and more particularly, to a hard hard coating film which can harden the surface hardness more than before.

Recently, as the display industry has rapidly developed in the IT industry, the importance of display protection films for protecting displays has increased.

The display includes a cathode ray tube (CRT), a cathode ray tube (CRT), a field emission diode (FED), a plasma display panel (PDP), a liquid crystal display (LCD), a light emitting diode (LED), an organic light emitting diode (OLED) There are various types and sizes of display products. In addition, display products are being developed in the direction of realizing lightness and slimness of the display itself.

On the other hand, displays of various types and sizes suffer from the problem that the impact resistance is weakened by the lightness and slimness of the display itself.

Therefore, in recent years, a display protective film industry has been developed to protect displays of various kinds and sizes. In addition, in order to realize weight reduction and slimness of the display itself, there is a need for a display protective film which is excellent in impact resistance and light in weight.

Conventionally, glass has been used as a display protective film for protecting such a display.

However, glass has a good transparency, but it can not easily be broken due to a lack of impact resistance, has a limitation in thinning, and has a limit in weight because it has a large weight per unit volume.

Therefore, a resin which is excellent in impact resistance and can be reduced in weight, for example, a polycarbonate (PC), a polyimide (PI), a polyethylene (PE), a polypropylene (PP), a polyarylate polyacrylate, PAR), polyethylene terephthalate (PET), poly (methylmethacrylate) and PMMA), or a curable resin such as an acrylic resin, an epoxy resin, and an unsaturated polyester One transparent film is gradually replacing glass.

However, this type of resin has a certain level of hardness, but can not be said to have sufficient hardness to protect the display.

Therefore, it is urgent to develop a technique for solving the limitations of the prior arts.

Korean Patent No. 10-2015-0039101 (LG Chem Co., Ltd.), 2015.04.09

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a high hardness hard coating film and a method of manufacturing the same, which can harden a surface hardness by attaching a component for strengthening hardness to a resin.

According to one aspect of the present invention, a hardness reinforcement, which is selected from among glass-fiber and glass-bead, which strengthens hardness, is attached to an ultraviolet ray-curable urethane acrylate oligomer, Hard hard coating resin providing step of providing a hard coating resin; And a hard hard coating layer forming step of forming the hard hard coating layer by providing the hard hard coating resin on the hard hard coating base film constituting the base of the hard hard coating film. A method for producing a coating film can be provided.

Wherein the hard hard coating resin comprises 50 wt% to 80 wt% of the urethane acrylate oligomer relative to 100 wt% of the hard hard hard coating resin; 5 wt% to 20 wt% of a polysiloxane monomer relative to 100 wt% of the hard hard coating resin; 5 wt% to 10 wt% multifunctional monomers based on 100 wt% of the hard hard coating resin; And 0.5 wt% to 1.5 wt% photoinitiator to 100 wt% of the hard hard coating resin.

The glass beads are provided at 0.5 wt% to 5 wt% with respect to 100 wt% of the hard hard coating resin, and the glass beads are prepared at 1 wt% to 6 wt% with respect to 100 wt% of the hard hard coating resin .

The step of preparing the hard hard coating resin may include the step of modifying the hard hardener to reform the surface of the hard hardener to strengthen the attachment of the hard hardener to the urethane acrylate oligomer.

The hardness strengthening material surface modification step may be a corona discharge treatment step of modifying the surface of the hardness reinforcement material by irradiating a Corona discharge.

The corona discharge treatment step may be performed at a corona discharge power source power of 10 W to 55 W, a corona discharge treatment time of 10 s to 110 s, a corona discharge treatment pressure of 10 mtorr to 110 mtorr, and a corona discharge treatment oxygen concentration of 95 sccm to 105 sccm .

The hard hard coating layer forming step may include: preparing a first hard hard coating base film having a first hard hard coating base film; Providing a high hardness hard coating resin layer on the first hardness hard coating base film; Preparing a second hard hard coating base film having a second hard hard coating base film on the hard hard coating resin layer; And forming a rigid hard hard coating base film to form a rigid hard hard coating base film by laminating the first hard hard coating base film and the second hard hard coating base film.

The hard hard coating layer forming step may include a photoreaction curing step of photocuring the hard hard hard coating base film to form a hard hard coating layer; A second hard hard coating base film removal step of removing the second hard hard coating base film; And a pressure-sensitive adhesive coating layer forming step of forming a pressure-sensitive adhesive coating layer by coating a pressure-sensitive adhesive on the high hardness hard coating layer.

According to another aspect of the present invention, there is provided a high hardness hard coating base film constituting the base of a hard hard coating film; And a hard hard coating layer formed by providing a hard hard hard coating resin on the hard hard coating base film, wherein the hard hard coating resin comprises glass fiber and glass bead reinforcing hardness, And a glass-bead. The high hardness hard coating film may be provided by attaching the hardness reinforcement to a UV-curable Urethane Acrylate Oligomer.

Wherein the hard hard coating resin comprises 50 wt% to 80 wt% of the urethane acrylate oligomer relative to 100 wt% of the hard hard hard coating resin; 5 wt% to 20 wt% of a polysiloxane monomer relative to 100 wt% of the hard hard coating resin; 5 wt% to 10 wt% multifunctional monomers based on 100 wt% of the hard hard coating resin; 0.5 wt% to 1.5 wt% photoinitiator to 100 wt% of the hard hard coating resin; And 1 wt% to 6 wt% of a glass bead with respect to 100 wt% of the hard hard coating resin and 0.5 wt% to 5 wt% of glass-fiber and 100 wt% of the hard hard coating resin, And a hardness reinforcing material.

The hard hard coating film may have a thickness ranging from 100 μm to 250 μm.

Wherein the hard hard coating base film is formed of a first hard hard coating base film and a second hard hard coating base film, wherein the hard hard coating layer comprises a first hard hard coating base film, And may be provided between the hard hard coating base film.

And a pressure-sensitive adhesive coating layer provided on the hard hard coating layer.

According to the present invention, it is possible to provide a high hardness hard coat film which can adhere glass-fiber or glass-bead, which is a component for strengthening hardness, Can be provided.

1 is a flowchart illustrating a method of manufacturing a hard hard coating film according to an embodiment of the present invention.
FIG. 2 is a view schematically showing a hard hard coating film produced by the manufacturing method of FIG.
3 is a flowchart illustrating a method of manufacturing a hard hard coating film according to another embodiment of the present invention.
FIG. 4 is a schematic view of a hard hard coating film produced by the manufacturing method of FIG. 3. FIG.
5 is a flowchart illustrating a method of manufacturing a hard hard coating film according to another embodiment of the present invention.
FIG. 6 is a schematic view of a hard hard coating film produced by the manufacturing method of FIG.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 1 is a flow chart of a method for manufacturing a hard hard coating film according to an embodiment of the present invention, and FIG. 2 is a view schematically showing a hard hard coating film produced by the manufacturing method of FIG.

As shown in detail in FIG. 1, the method for producing a hard hard coating film according to this embodiment includes a hard hard hard coating resin preparing step (S110) and a hard hard coating layer forming step (S120).

In the hard hard coating resin preparing step (S110), a hard reinforcing material selected from glass-fiber and glass-bead for reinforcing hardness is coated on a UV-curable urethane acrylate oligomer Thereby providing a hard hard coating resin.

The high hardness hard coating resin comprises 50 wt% to 80 wt% of urethane acrylate oligomer based on 100 wt% of hard hard coating resin, 5 wt% to 20 wt% of polysiloxane monomer (relative to 100 wt% of hard hard coating resin) and 5 wt% to 10 wt% of a multifunctional monomer relative to 100 wt% of a hard hard coating resin and 0.5 wt% to 1.5 wt% of a photoinitiator relative to 100 wt% of a hard hard coating resin. .

The glass fiber is provided at 0.5 wt% to 5 wt% with respect to 100 wt% of hard hard coating resin, and the glass beads are provided at 1 wt% to 6 wt% with respect to 100 wt% of hard hard coating resin.

The hard hard coating resin preparing step S110 according to this embodiment includes a hardening reinforcement surface modifying step S111.

The hardness reinforcement surface modification step (S111) is a step of reforming the surface of the hardness reinforcement to enhance adhesion of the hardness reinforcement to the urethane acrylate.

The hardening reinforcement surface modification step S111 according to this embodiment is a corona discharge treatment step (S111) for modifying the surface of the hardness reinforcement material by irradiating a corona discharge.

The corona discharge processing step (S111) according to the present embodiment is a process of discharging corona discharge power of 10 W to 55 W, corona discharge treatment time of 10s to 110s, corona discharge processing pressure of 10 mtorr to 110 mtorr, corona discharge treatment oxygen concentration of 95 sccm to 105 sccm.

The hard hard coating layer forming step S120 may include forming a hard hard coating layer 120 by providing a hard hard coating resin on the hard hard coating base film 110 forming the base of the hard hard coating film, to be.

2, the hard hard coating film 100 prepared by the method of producing a hard hard coating film according to the present embodiment includes a hard hard coating base film 110, a hard hard coating layer 110, (120).

The hard hard coating film 100 according to this embodiment has a thickness of 100 m (Micrometer) to 250 m.

The hard hard coating base film 110 forms the base of the hard hard coating film 100 and is made of polycarbonate (PC), polyimide (PI), polyethylene (PE), polypropylene polypropylene, polypropylene (PP), polyarylate (PAR), polyethyleneterephthalate (PET), poly (methylmethacrylate) and PMMA.

The hard hard coating base film 110 according to this embodiment is formed of polyethylene terephthalate (PET). However, the scope of rights of the present invention is not limited thereto, and other products may be prepared as necessary.

The hard hard coating layer 120 is formed by providing a hard hard hard coating resin on the hard hard coating base film 110.

The high hardness hard coating resin is prepared by attaching a hardness reinforcing material, which is one of glass-fiber and glass-bead, which strengthens the hardness, to an ultraviolet ray-curable urethane acrylate oligomer .

The hard hard coating resin is prepared by mixing urethane acrylate oligomer with 50 wt% to 80 wt% of the hard hard hard coating resin in relation to 100 wt% (mass fraction) and 5 wt% of the polysiloxane monomer 5 and 5 wt% to 10 wt% of a multifunctional monomer relative to 100 wt% of a hard hard coating resin, and 0.5 wt% to 10 wt% of a photoinitiator to 100 wt% of a hard hard coating resin. And 1 wt.% To 6 wt.% Of glass beads relative to 100 wt.% Of hard hard coating resin and 0.5 wt.% To 5 wt.% Of glass-fiber and 100 wt.% Of hard hard coating resin. lt; RTI ID = 0.0 > wt.% < / RTI >

Hereinafter, the content of the present invention will be described in detail through experimental examples. It should be understood, however, that these examples are provided for illustrative purposes only and are not to be construed as limiting the scope of the present invention.

<Experimental Example 1> Comparative test of hardness of hard hard coat film

The hard hard coating film 100 according to the present example is formed of polyethylene terephthalate (PET) to have a thickness of 188 탆.

The high hardness hard coating resin comprises 70 wt% of the urethane acrylate oligomer with respect to 100 wt% of the hard hard hard coating resin, 20 wt% of the polysiloxane monomer relative to 100 wt% of the hard hard coating resin, 5 wt% of a multifunctional monomer based on 100 wt% of a hard hard coating resin, and 1 wt% of a photoinitiator based on 100 wt% of a hard hard coating resin.

The content of glass-fiber and glass-bead attached to the urethane acrylate oligomer is varied in relation to 100 wt% of the hard hard coating resin. The hard hard coating film 100 has a surface hardness .

The surface hardness test is Pencil Hardness hardness test, and the surface hardness weight is 500g.

The surface hardness of the hard hard coating film containing glass fibers or glass beads according to the present example showed a surface hardness superior to the surface hardness of a film not containing glass fibers or glass beads.

<Experimental Example 2> Measurement of transmittance and refractive index change of hard hard coating film

In the case of adding 3 wt% to 5 wt% of glass fiber to 100 wt% of hard hard coating resin to urethane acrylate oligomer and 4 wt% to 6 wt% of glass beads to 100 wt% of hard hard coating resin to urethane acrylate oligomer wt%, respectively, the transmittance and the refractive index of the hard hard coating film were measured.

In the present experiment, when the urethane acrylate oligomer was over-used with glass fiber and glass beads, the hard hard coating film had a lower transmittance, an increased refractive index, and cracks on the surface It looked. Also, when the glass fiber was overused, the surface strength was lowered.

&Lt; Experimental Example 3 > Comparison according to thickness change of hard hard coating film

Hardness Hard Coating Film Thickness and Hardness In order to test the degree of cracking and hardness of the hard hard coating film according to the variation of the thickness of the hard coating layer, (1) to the peak (5).

<Experimental Example 4> Comparison of adhesion between urethane acrylate oligomer and hardening reinforcement

In order to test the degree of adhesion of urethane acrylate and hardener reinforcements with changes in power, time, pressure, and oxygen concentration during corona treatment, the degree of cracking and film warpage were classified as the highest (1) to the highest (5).

&Lt; Experimental Example 5 > Comparison according to coating type

Surface hardness and coating ability of a hard hard coating layer on a hard hard coating base film to form a hard hard coating layer.

It is impossible to coat by gravure method, and surface smoothness and surface hardness were evaluated to be excellent in the coating method according to the roll-to-roll method.

&Lt; Experimental Example 6 > Comparison according to hardening method of hard hard coating resin

This is an experiment for evaluating physical properties according to a method of hardening a hard hard coating resin on a hard hard coating base film.

The hard hard coating film hardened by the hardening of the hard hard coating resin by the photo-curing method is superior in hardenability to the hard hard coating film due to the hardening of the hard hard hard coating resin by the heat hardening method, And excellent warpage showing the flexibility of the hard hard coating film was obtained.

In addition, the curing of the hard hard coating resin by the photo-curing method improves the stability of production of the hard hard coating film since there is no change with time which means that the properties of the hard hard hard coating resin after the curing change.

The hardening of the hard hard coating resin by the photo-curing method does not cause odor on the production of the hard hard hard coating film, thereby improving the safety of the production environment of the hard hard coating film.

FIG. 3 is a flow chart of a method of manufacturing a hard hard coating film according to another embodiment of the present invention, FIG. 4 is a view schematically showing a hard hard coating film produced by the manufacturing method of FIG. 3, FIG. 5 is a flowchart showing a method of manufacturing a hard hard coating film according to another embodiment of the present invention, and FIG. 6 is a view schematically showing a hard hard coating film produced by the manufacturing method of FIG. 5 . Only those parts which are different from the embodiment of the present invention will be described with reference to these drawings, and the description of the same parts will be omitted.

3, the hard hard coating layer forming step S220 according to the present embodiment includes a first hard hard coating base film preparing step S221 and a hard hard hard coating resin layer preparing step S222 A second hard hard coating base film forming step (S223), and a hard hardness hard coating base film forming step (S223).

The first hard hard coating base film preparing step S221 is a step of preparing a first hard hard hard coating base film and the hard hard hard coating resin layer preparing step S222 is a step of forming a hard hard hard coating base film on the first hard hard coating base film (S223) is a step of providing a second hard hard coating base film on the hard hard coating resin layer, and the second hard hard coating base film providing step The hard coating base film forming step S224 is a step of forming a hard hard hard coating base film by laminating a first hard hard coating base film and a second hard hard coating base film.

The hard hard coating film 200 produced by the method of producing a hard hard coating film shown in FIG. 3 includes a hard hard coating base film 210, a hard hard coating layer 210, (220).

The hard hard coating base film 210 according to this embodiment is formed of a first hard hard coating base film 211 and a second hard hard coating base film 212.

The hard hard coating layer 220 is provided between the first hard hard coating base film 211 and the second hard hard coating base film 212.

5, the hard hard coating layer forming step S320 according to the present embodiment includes a photoreactive curing step of forming a hard hard coating layer by photo-reaction curing the hard hard hard coating base film (S325) for removing the second hard hard coating base film, a second hard hard coating base film removing step (S326) for removing the second hard hard coating base film, and a pressure sensitive adhesive coating layer forming step (S326) for forming a pressure sensitive adhesive coating layer by coating an adhesive on the hard hard coating layer (Step S327).

The hard hard coating film 300 produced by the method of producing a hard hard coating film shown in FIG. 5 comprises a hard hard coating base film 310 and a hard hard coating layer 300, (320), and an adhesive coating layer (330).

The pressure-sensitive adhesive coating layer 330 is provided on the hard hard coating layer 320.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It is therefore intended that such modifications or alterations be within the scope of the claims appended hereto.

100: hard hard coating film 110: hard hard hard coating base film
120: Hard hard coat layer

Claims (13)

A hardness reinforcing material selected from glass-fiber and glass-bead reinforcing hardness is attached to an ultraviolet ray-curable urethane acrylate oligomer to form a hardness hardness hard coat resin A hard coating resin preparing step; And
And a hard hard coating layer forming step of forming the hard hard coating layer by providing the hard hard coating resin on the hard hard coating base film constituting the base of the hard hard coating film,
In the hard hard coating layer forming step,
Preparing a first hard hard coating base film having a first hard hard coating base film;
Providing a high hardness hard coating resin layer on the first hardness hard coating base film;
Preparing a second hard hard coating base film having a second hard hard coating base film on the hard hard coating resin layer; And
And forming a rigid hard hard coating base film by laminating the first hard hard coating base film and the second hard hard coating base film to form a rigid hard hard coating base film. &Lt; / RTI &gt; The method according to claim 1,
The high hardness hard coating resin is a hard hard coating resin,
50 wt% to 80 wt% of the urethane acrylate oligomer relative to 100 wt% of the hard hard coating resin;
5 wt% to 20 wt% of a polysiloxane monomer relative to 100 wt% of the hard hard coating resin;
5 wt% to 10 wt% multifunctional monomers based on 100 wt% of the hard hard coating resin; And
And 0.5 wt% to 1.5 wt% of a photoinitiator to 100 wt% of the hard hard coating resin. The method according to claim 1,
The glass fiber is provided in an amount of 0.5 wt% to 5 wt% based on 100 wt% of the high hardness hard coating resin,
Wherein the glass beads are provided in an amount of 1 wt% to 6 wt% based on 100 wt% of the hard hard coating resin. The method of claim 3,
The hard hard coating resin preparing step may include:
And a hardening reinforcement surface reforming step of reforming the surface of the hardness reinforcement material to enhance adhesion of the hardness reinforcement material to the urethane acrylate oligomer. 5. The method of claim 4,
Wherein the step of modifying the surface of the hardenable reinforcement is a corona discharge treatment step of modifying the surface of the hardenable reinforcement by irradiating a corona discharge. 6. The method of claim 5,
The corona discharge processing step includes:
A corona discharge treatment power of 10 W to 55 W, a corona discharge treatment time of 10 s to 110 s, a corona discharge treatment pressure of 10 mTorr to 110 mTorr, and a corona discharge treatment oxygen concentration of 95 sccm to 105 sccm. Gt; delete The method according to claim 1,
In the hard hard coating layer forming step,
A photoreaction curing step of photoreaction-curing the hard cured hard coating base film to form a hard cured hard coating layer;
A second hard hard coating base film removal step of removing the second hard hard coating base film; And
And forming a pressure-sensitive adhesive coating layer by coating a pressure-sensitive adhesive on the high-hardness hard-coating layer to form a pressure-sensitive adhesive coating layer. A hard hard coating base film constituting the base of the hard hard coating film; And
And a hard hard coating layer formed by providing a hard hard coating resin on the hard hard coating base film,
The high hardness hard coating resin is a hard hard coating resin,
(Urethane Acrylate Oligomer), which is one of a glass fiber and a glass bead reinforcing hardness,
Wherein the hard hard coating base film is formed of a first hard hard coating base film and a second hard hard coating base film,
The high hardness hard coat layer is a hard coat layer,
Wherein the hard hard coating film is provided between the first hard hard coating base film and the second hard hard coating base film. 10. The method of claim 9,
The high hardness hard coating resin is a hard hard coating resin,
50 wt% to 80 wt% of the urethane acrylate oligomer relative to 100 wt% of the hard hard coating resin;
5 wt% to 20 wt% of a polysiloxane monomer relative to 100 wt% of the hard hard coating resin;
5 wt% to 10 wt% multifunctional monomers based on 100 wt% of the hard hard coating resin;
0.5 wt% to 1.5 wt% photoinitiator to 100 wt% of the hard hard coating resin; And
Wherein the glass hardness of the hard hard coating resin is in the range of 0.5 wt% to 5 wt% of glass fiber and 1 wt% to 6 wt% of the glass bead in relation to 100 wt% of the hard hard coating resin. And a hardness reinforcing material selected from any one selected from the group consisting of the hard hardeners. 10. The method of claim 9,
Wherein the high hardness hard coating film has a thickness ranging from 100 占 퐉 to 250 占 퐉. delete 10. The method of claim 9,
And a pressure-sensitive adhesive coating layer provided on the hard hard coating layer.

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