JP2002258760A - Colored hard coat film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart high color purity, high contrast and superior antireflection performance to a display such as an electronic display without lowering luminance. SOLUTION: The colored hard coat film comprises a transparent substrate film and a hard coat layer disposed on one face of the substrate film and contains a colorant and the visible light transmission characteristics of the colored hard coat film satisfy the formulae 560 nm<=X<=610 nm, Y<=80 nm, Tabs /T540 <0.8, 0.5<=T620 /T540 <=1.5 and 0.5<=T450 /T540 <=1.5 (where X, Y and Tabs are the wavelength, half-width and transmittance of the maximum absorption peak in visible light of 540-630 nm wavelength, respectively, and T450 , T540 and T620 are transmittance to visible light of 450 nm, 540 nm and 620 nm wavelength, respectively).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a colored hard coat film suitable for bonding to a display surface of a display device. More specifically, the present invention relates to a colored hard coat film capable of improving contrast and color purity of an image by being attached to a display surface of an electronic display such as a CRT or a liquid crystal display device.

[0002]

2. Description of the Related Art An electronic display such as a CRT or a liquid crystal such as a television or a personal computer displays an image by emitting three lights of blue light, green light and red light. At this time, the intermediate colors of the blue light and the green light or the green light and the red light are also emitted, and there is a problem that the hue contrast of the image is blurred by the light of the intermediate colors. This problem has been strongly demanded to be improved because the rapid spread of personal computers has increased the time for which the user keeps watching the display surface.

As a countermeasure against this problem, a protective film consisting of a protective layer and a pressure-sensitive adhesive layer is attached to an image display surface, and carbon black is blended in the pressure-sensitive adhesive layer.
It has been proposed in Japanese Patent Publication No. 1-335639. According to the publication, the carbon black of the pressure-sensitive adhesive layer increases the average absorbance over each wavelength in the visible light range, so that transmission of intermediate colors of blue light and green light and green light and red light is prevented. It is disclosed that each of them can be suppressed and the hue contrast of an image becomes clear.
However, the method of reducing the transmittance on average as in this publication has a drawback that the light amount itself of the CRT decreases, and as a result, the brightness of the CRT decreases.

As a method for solving such a drawback, Japanese Patent Laid-Open No. 58-153904 discloses a method of improving the contrast and the color purity by using a color filter having selectivity in the transmittance of visible light. No. pp. 139 to 163. However, since the color filter disclosed in this publication is an external surface mounting type that is merely placed on the display side of the display surface and is not integrated with a cathode ray tube, an air layer is interposed between the cathode ray tube and the external surface filter to reduce the reflectance of external light. There is a drawback that it is very difficult to suppress it and visibility tends to be reduced due to extraneous light.

Japanese Patent Application Laid-Open No. 57-5251 proposes to add a colorant to the glass of a cathode ray tube and use a glass having a selective absorption for visible light, but the production cost is extremely high. Therefore, it has not yet been commercialized. In addition, in a flattened cathode ray tube that has become widespread in recent years, the thickness of the glass greatly differs between the central portion and the peripheral portion of the cathode ray tube. It is more difficult to have.

[0006] As described above, there has not yet been provided an inexpensive solution for improving the contrast of the image display surface, improving the color purity, preventing the luminance of the CRT from lowering, and eliminating the deterioration in visibility due to extraneous light. Is the current situation.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a display device such as an electronic display with:
It is to develop high color purity, high contrast, and excellent antireflection performance without lowering luminance.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, the relationship between the intensity of light emitted from a CRT or the like and the wavelength of light shows that blue,
It was confirmed that there were three peaks of green and red, and the problem was that the tails of the blue and green and green and red peaks overlapped. Specifically, if there is such a superposition, the intermediate color between blue and green is produced even if only blue or green is produced, and the intermediate color between red and green, that is, yellowish is produced even if only green or red is produced. If a tinted color is produced and the intermediate colors are produced, the contrast and color purity of the image are reduced. FIG. 7 shows the emission spectra of the blue, green, and red phosphors on the phosphor screen of the cathode ray tube. FIG. 7 shows the relative light emission luminance on the vertical axis and the wavelength of light on the horizontal axis, and the tail of the peak of each emission spectrum is superimposed.

The inventors of the present invention have studied the influence of the light of each wavelength on the visibility, and as a result, it has been found that the reduction of the contrast and the color purity of the image due to the superimposition is caused by the human eye in the intermediate color portion between green and red. Since the sensitivity to light is high, it has been found that the influence of the intermediate color between green and red is greater than the effect of the intermediate color between blue and green. It has also been found that the extraneous light causes a decrease in the contrast and color purity of an image, but the influence of the intermediate color between green and red is also greatly affected. On the other hand, it has also been found that the intermediate color between blue and green has low sensitivity to human eyes and thus contributes to the improvement of color purity, but has little effect in terms of contrast.

Therefore, the present inventors have further studied to selectively absorb a neutral color between green light and red light,
When a colored hard coat film in which a colorant that selectively absorbs an intermediate color between green light and red light is blended between layers or within a layer is directly bonded to the image display surface, the color hard coat film can be used without reducing the brightness of the image display device. The present inventors have found that a decrease in visibility due to light can be prevented, and that the contrast and the color purity can be improved.

Thus, according to the present invention, there is provided a hard coat film comprising a transparent base material film and a hard coat layer provided on one surface thereof and containing a colorant,
The light transmission characteristic in visible light is the following general formula

[0012]

560 nm ≦ X ≦ 610 nm

## EQU7 ## Y ≦ 80 nm

[ _Expression 8] T _abs / T ₅₄₀ <0.8

[Expression 9] 0.5 ≦ T ₆₂₀ / T ₅₄₀ ≦ 1.5

0.5 ≦ T ₄₅₀ / T ₅₄₀ ≦ 1.5 (where X is the wavelength of the maximum absorption peak in visible light having a wavelength of 540 to 630 nm, and Y is the wavelength of 540 to 630 n.
m, the half width of the maximum absorption peak in visible light, T _abs
Is the light transmittance at the maximum absorption peak wavelength in the visible light of 540 to 630 nm, T ₄₅₀ is the light transmittance at the wavelength of ₄₅₀ nm, T ₅₄₀ is the light transmittance at the wavelength of ₅₄₀ nm, and T ₆₂₀ is the light transmittance at the wavelength of ₆₂₀ nm. is there. A colored hard coat film satisfying the above condition is provided.

According to the present invention, as a preferred embodiment of the colored hard coat film of the present invention, a colored hard coat film having an adhesive layer on the transparent substrate film surface of the colored hard coat film, A colored hard coat film having an antireflection layer on the surface of the hard coat layer, and a colored hard coat film having an antifouling layer on the antireflection layer of the colored hard coat film are also provided.

Further, according to the present invention, as a preferred embodiment of the colored hard coat film of the present invention, the transparent base film is a colored hard coat film containing a colorant, and the hard coat layer is a colored hard coat film containing a colorant. A hard coat film, a colored hard coat film in which the adhesive layer contains a colorant, a colored layer between the transparent substrate film and the hard coat layer, and the layer contains a colorant. There is also provided a colored hard coat film in which a colored layer is provided between the adhesive layer and the adhesive layer, and the layer contains a coloring agent.

Further, according to the present invention, as a preferred embodiment of the colored hard coat film of the present invention, a colored hard coat film having a total light transmittance of 40% or more in visible light having a wavelength of 400 to 650 nm, a coloring agent A colored hard coat film which is at least one dye selected from the group consisting of anthraquinone dyes, quinacdrine dyes, pyrinone dyes, polymethine dyes, pyromethene dyes, porphyrin dyes and phthalocyanine dyes is also provided, These colored hard coat films can be suitably used for sticking to the display surface of a display device.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The colored hard coat film of the present invention has a light transmittance in a region corresponding to an intermediate color between green and red which is reduced by an appropriate amount so as not to transmit the overlapping portion of the three primary colors green and red. This is a colored hard coat film in which a colorant is added to a hard coat film composed of a hard coat layer and a transparent substrate film. Therefore, the colored hard coat film of the present invention needs to have a light transmission characteristic in a visible light range within the range shown by the following formula in order not to transmit the light of the overlapping portion of the three primary colors green and red.

[0017]

560 nm ≦ X ≦ 610 nm

## EQU12 ## Y ≦ 80 nm

T _abs / T ₅₄₀ <0.8

[Expression 14] 0.5 ≦ T ₆₂₀ / T ₅₄₀ ≦ 1.5

0.5 ≦ T ₄₅₀ / T ₅₄₀ ≦ 1.5 where X is the wavelength of the maximum absorption peak in visible light having a wavelength of 540 to 630 nm, and Y is the wavelength 540 to 6
Half width of maximum absorption peak in visible light of 30 nm,
T _abs is the light transmittance at the maximum absorption peak wavelength in visible light of 540 to 630 nm, and T ₄₅₀ is 450 nm.
₅₄₀ indicates the light transmittance at a wavelength of ₅₄₀ nm, and T620 indicates the light transmittance at a wavelength of ₆₂₀ nm. In addition, the visible light in the present invention means a light having a wavelength of 400 to 650 nm unless otherwise specified.

The maximum emission wavelengths of green and red in a CRT (CRT) are 540 nm and 620 nm, respectively.
Neighboring overlapping portions where they overlap are between them. Therefore, the colored hard coat film of the present invention, which hardly transmits the light in the overlapping portion of green and red, has a wavelength of 540.
It is necessary that the wavelength (X) of the maximum absorption peak in the visible light region of ６630 nm is in the range of 560 nm to 610 nm, and if X is less than 560 nm or exceeds 610 nm, the green or red emission itself is largely absorbed. Neither improvement in contrast nor improvement in color purity can be expected. Preferred X
Ranges from 570 nm to 600 nm. In addition, wavelength 5
It is necessary that the half width (Y) of the maximum absorption peak in the visible light region of 40 to 630 nm is 80 nm or less. Neither improvement nor improvement in color purity can be expected. Preferred Y is at most 60 nm, more preferably at most 50 nm, very preferably at most 40 nm.
Note that the lower limit of Y is at least 10 nm.
This is preferable because it can support a wide range of display devices.

Further, in order to improve the contrast and the color purity, the absorption at the overlapped portion of green and red is sufficient, that is, the transmittance at the absorption peak is sufficiently high for each emission wavelength in a CRT. Must be low. Therefore, the colored hard coat film of the present invention has a T _abs / T ₅₄₀ of less than 0.80, preferably 0.6.
Should be less than 0, more preferably less than 0.40.

Further, as a coloring agent, visible light is selectively applied.
When dyes are used for absorption, color development tends to be biased
Therefore, it is important to minimize the hue (saturation) shift as much as possible.
is there. To suppress hue shift, CRT (Brown
Red, green, and blue emission wavelengths in the tube), ie, wavelength 4
Light transmission at 50 nm, 540 nm and 620 nm
It is necessary that the excess rates be almost equal. Therefore, C
Light transmittance at red, green and blue emission wavelengths at RT
T, the ratio between each other₄₅₀/ T₅₄₀And T₆₂₀/ T_{Five 40}Is
Each must be in the range of 0.5 to 1.5. T
₄₅₀/ T₅₄₀Or T₆₂₀/ T₅₄₀In either case,
If it is outside the range, the degree of coloring of the light emitted from the CRT will be large.
And the visibility decreases. T₄₅₀/ T₅₄₀And T₆₂₀
/ T₅₄₀Is preferably 1.3 or more, respectively.
1.2, particularly preferably 1.1. Also, T
₄₅₀/ T₅₄₀And T₆₂₀/ T₅₄₀Lower bounds are preferred
0.7, more preferably 0.8, particularly preferably
0.9.

A colored hard coat film having such optical characteristics can be obtained by including a coloring agent satisfying the above-mentioned optical characteristics in any one of the layers constituting the hard coat film. The coloring agent used in the present invention should be at least 150 in consideration of the heat history up to the final product.
At a temperature of not more than ℃, those that are unlikely to cause deterioration or deterioration are preferred, specifically, anthraquinone dyes, quinacdrine dyes, pyrinone dyes, polymethine dyes, pyromethene dyes, porphyrin dyes, phthalocyanine dyes, and the like are preferable. Can be mentioned. The preferred amount of the coloring agent is 0.004 to 0.420 g / m ² , more preferably 0.004 to 0.420 g / m ² , based on the area of the colored hard coat film, that is, the area of the surface perpendicular to the thickness direction of the colored hard coat film. ０．２0.200 g / m ² .

Incidentally, the colored hard coat film of the present invention preferably has a haze value of 10% or less, more preferably 5% or less. If the haze value is larger than 10%, the hue of the image becomes cloudy and lacks sharpness, and the visibility tends to decrease. The colorant used in the present invention may be either a dye or a pigment, but is preferably a dye from the viewpoint of haze value. When a pigment is used as a colorant, it is preferable to reduce the haze value by reducing the particle size.

The layer constitution of the colored hard coat film of the present invention will be described below in detail with reference to FIGS. In addition, the code | symbol in a figure, 1 is a transparent base film, 2 is a coloring layer,
3 is an adhesive layer, 4 is a hard coat layer, 5 is an antireflection layer,
6 is an antifouling layer, 21 is a colored transparent base film, 23
Denotes a colored adhesive layer, 24 denotes a colored hard coat layer, 51 denotes a medium refractive index layer, 52 denotes a high refractive index layer, and 53 denotes a low refractive index layer.

FIG. 1 shows a layer configuration 1 of the colored hard coat film of the present invention. The colored hard coat film of FIG. 1 is a colored transparent base film 21 containing a coloring agent.
The hard coat layer 4 is formed on one surface of the colored transparent base film 21 and the adhesive layer 3 is formed on the other surface, that is, the surface to be attached to the display surface of the display device. .

FIG. 2 shows Layer Configuration 2 of the colored hard coat film of the present invention. The colored hard coat film in FIG. 2 is an example in which the adhesive layer contains a colorant, and the hard coat layer 4 is attached to one surface of the transparent substrate film 1 on the other surface, that is, the display surface of the display device. The colored adhesive layer 23 is formed on the side surface.

FIG. 3 shows Layer Configuration 3 of the colored hard coat film of the present invention. The colored hard coat film in FIG. 3 is an example in which the hard coat layer contains a colorant. The hard coat layer 24 is attached to one surface of the transparent base film 1 and the other surface, that is, the display surface of the display device. The adhesive layer 3 is formed on the surface to be attached.

FIG. 4 shows Layer Configuration 4 of the colored hard coat film of the present invention. As can be seen from FIG. 4, a hard coat layer 4 is formed on one surface of the transparent substrate film 1, and a coloring layer 2 containing a coloring agent is formed on the other surface. An adhesive layer 3 is formed. The surface of the colored hard coat film on which the adhesive layer 3 is formed is
This is the surface to be attached to the display surface of the display device.

FIG. 5 shows Layer Structure 5 of the colored hard coat film of the present invention. In the colored hard coat film of FIG. 5, a colored layer 2 containing a colorant is formed on one surface of a transparent substrate film 1, and a hard coat layer 4 is further formed on the colored layer 2. The other side of the film 1,
That is, the adhesive layer 3 is formed on the surface to be attached to the display surface of the display device.

FIG. 6 shows a layered structure 6 of the colored hard coat film of the present invention. The colored hard coat film of FIG. 6 is an example in which antireflection properties and antifouling properties are imparted, and a medium refractive index layer 51 and a high refractive index are formed on the hard coat layer 4 of the colored hard coat film of the layer configuration 1 in FIG. Index layer 52, low refractive index layer 53
An anti-reflection layer 5 made of in this order is provided in this order, and an antifouling layer 6 is further provided on the anti-reflection layer 5. In addition, the antireflection layer 5 or the antifouling layer 6 can be applied not only to the colored hard coat film having the layer structure 1 but also to any of the colored hard coat films having the layer structures 2 to 5 described above. It is preferably provided on a surface different from the transparent substrate film side.

Further, the colored hard coat film of the present invention is not limited to the above-mentioned layer constitution shown in FIGS. 1 to 6, and may be a combination of these. For example, a transparent substrate film and a hard coat layer, a transparent substrate film and an adhesive layer, or both a hard coat layer and an adhesive layer containing a coloring agent, or a transparent substrate film, a hard coat layer and a transparent substrate One in which a colorant is contained in three layers of a material film is exemplified.

Next, each layer constituting the colored hard coat film of the present invention will be described in detail below.

[Transparent Substrate Film] The transparent substrate film used in the present invention is not particularly limited as long as it is colorless and transparent and has mechanical strength sufficient for practical use as a support for a colored hard coat film. In addition, the colorless here means that, when a colored hard coat film is formed, the above-mentioned optical characteristics in visible light are satisfied, and the transparent base film is colored by adding a coloring agent. Is included when the optical characteristics are satisfied. The term “transparent” as used herein means that the haze is at most 10% or less, preferably 5% or less. Specific transparent substrate films include polyester films, triacetyl cellulose (TAC) films, polyarylate films, polyimide films, polyether films, polycarbonate films, polysulfone films, polyethersulfone films, polyamide films, polypropylene films, poly Methylpentene film, polyvinyl chloride film, polyvinyl acetal film,
Examples thereof include a polymethyl methacrylate film and a polyurethane film. Among these, a polyester film is preferred from the viewpoint of transparency and processability, and a biaxially oriented polyester film is particularly preferred because of its high mechanical strength. The thickness of these transparent substrate films,
The thickness is preferably 50 μm or more because the scattering of glass is easily suppressed in the event that the CRT is implosed. On the other hand, the upper limit of the thickness is that the haze value is easily 10% or less, preferably 5% or less, and the productivity of the film is high. Is 250
μm or less is preferred.

Hereinafter, as the transparent substrate film of the present invention,
Preferred axially oriented polyester films will be described in detail.

The polyester constituting the biaxially oriented polyester film in the present invention is a linear saturated polyester synthesized from an aromatic dibasic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof. As specific examples of such polyester, polyethylene terephthalate, polyethylene isophthalate,
Examples thereof include polypropylene terephthalate, polybutylene terephthalate, poly (1,4-cyclohexylene dimethylene terephthalate), polyethylene-2,6-naphthalenedicarboxylate, and the like, and copolymers or blends of these. Among them, 70% by weight or more based on the weight of polyester is polyethylene terephthalate or polyethylene-2,6-.
Those composed of naphthalene dicarboxylate are preferred, and polyethylene terephthalate containing ethylene terephthalate as a main repeating unit is particularly preferred from the viewpoint of processability and transparency when a biaxially oriented film is formed.

The polyethylene terephthalate copolymerization component includes aromatic dicarboxylic acids such as isophthalic acid, phthalic acid and 2,6-naphthalenedicarboxylic acid, adipic acid, azelaic acid, sebacic acid and decane dicarboxylic acid as dicarboxylic acid components. Aliphatic dicarboxylic acids such as acids,
Alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid can be exemplified. Examples of the diol component include aliphatic diols such as 1,4-butanediol, 1,6-hexanediol, and diethylene glycol, and 1,4-cyclohexanedimethanol. Examples thereof include alicyclic diols and aromatic diols such as bisphenol A, and these copolymer components may be used alone or in combination of two or more. Among these copolymer components, isophthalic acid is particularly preferred from the viewpoint of processability and transparency.

The proportion of the copolymer component depends on the type thereof, but is preferably such that the resulting polymer has a melting point of 230 to 258 ° C. If the melting point is lower than 230 ° C., heat resistance and mechanical strength may be poor. When isophthalic acid is used as the copolymer component with ethylene terephthalate as the main repeating unit, the proportion of isophthalic acid may be 12 mol% or less based on the number of moles of the acid component. Here, the measurement of the melting point of the polyester is performed by DuPont Instruments.
A method of determining a melting peak at a heating rate of 20 ° C./min using 910 DSC. The sample amount is 20 mg.

The intrinsic viscosity (orthochlorophenol, 35 ° C.) of the polyester is preferably 0.52 to 1.50, more preferably 0.57 to 1.00, and particularly preferably 0.60 to 0.1. 80. When the intrinsic viscosity is less than 0.52, the film-forming property tends to decrease, while when the intrinsic viscosity exceeds 1.50, the moldability may be impaired.

The above-mentioned polyesters can be produced by a method known per se. For example, terephthalic acid, ethylene glycol and, if necessary, a copolymerization component (for example, isophthalic acid) are subjected to an esterification reaction, and the obtained reaction product is subjected to an esterification reaction. A method in which a polyester is obtained by a polycondensation reaction until a desired degree of polymerization is obtained, or a transesterification reaction of dimethyl terephthalate, ethylene glycol and, if necessary, a copolymer component (eg, dimethyl isophthalate) is carried out. A method in which the resulting reaction product is subjected to a polycondensation reaction until a desired degree of polymerization is obtained to obtain a polyester can be preferably exemplified. Of course, if necessary, 2,6-naphthalenedicarboxylic acid or 1,4-cyclohexanedimethanol can be used as the acid component or the glycol component. The polyester obtained by the above method (melt polymerization) can be converted into a polymer having a higher degree of polymerization, if necessary, by a polymerization method in a solid state (solid state polymerization). And the polymer thus obtained is
A film forming method known per se, that is, a polyester is made into a molten state, and then extruded from a linear die to form an unstretched film, which can be stretched and heat-treated to form a biaxially oriented film.

In the above-mentioned polyester production process or in the subsequent process up to extrusion from a die, if necessary, an antioxidant, a heat stabilizer, a viscosity modifier, a plasticizer, a hue improver, a lubricant, a core, Additives such as an agent, an ultraviolet absorber, an antistatic agent, an antioxidant, and a catalyst may be added. As the lubricant in the above-mentioned polyester, a suitable roughening substance (filler) can be contained. Examples of the filler include those conventionally known as a slipperiness imparting agent for polyester films. Examples thereof include calcium carbonate, calcium oxide, aluminum oxide,
Examples include kaolin, silicon oxide, zinc oxide, carbon black, silicon carbide, tin oxide, crosslinked acrylic resin particles, crosslinked polystyrene resin particles, melamine resin particles, crosslinked silicone resin particles, and the like. Among these, porous silica having an average particle size of 1 to 3 μm is preferred because it is easy to obtain slipperiness while maintaining transparency. The addition amount of the porous silica is 0.01 to 0.005% by weight from the viewpoint of transparency and slipperiness.
Is preferred.

Incidentally, the above-mentioned biaxially oriented polyester film is preferably provided with a slippery adhesive layer on at least one surface thereof in order to enhance the adhesiveness with layers other than the above-mentioned transparent substrate film.

The above-mentioned slippery adhesive layer is preferably composed of a composition mainly composed of an aqueous polyester and an amide of a fatty acid and / or a bisamide of a fatty acid. The aqueous polyester forming the slippery adhesive layer has a glass transition point (Tg) of preferably 40 to 85 ° C, particularly preferably 4 to 85 ° C.
5 to 80 ° C. When the glass transition point (Tg) of the aqueous polyester is less than 40 ° C., the obtained film tends to have low heat resistance and low blocking resistance. On the other hand, if the Tg of the aqueous polyester exceeds 85 ° C., the effect of improving the adhesiveness is poor.

Here, the water-based polyester referred to herein is:
Water-soluble or dispersible polyester, specifically, terephthalic acid, isophthalic acid, phthalic acid, 2,6-
Naphthalenedicarboxylic acid, hexahydroterephthalic acid,
4,4′-diphenyldicarboxylic acid, phenylindanedicarboxylic acid, adipic acid, sebacic acid, 5-Na sulfoisophthalic acid, trimellitic acid, carboxylic acid components such as dimethylolpropionic acid and ethylene glycol, diethylene glycol, neopentyl glycol, 1,4
-Butanediol, 1,6-hexanediol, 1,4
And polyesters produced from hydroxy compounds such as cyclohexanedimethanol, glycerin, trimethylolpropane, and alkylene oxide adducts of bisphenol A. When it is necessary to further impart affinity to water to the aqueous polyester, an SO ₃ Na group or COONa group may be introduced into the polyester, or a polyether component may be introduced.

In the present invention, the fatty acid amide or fatty acid bisamide constituting the slippery adhesive layer is R
¹ CONH ₂ or R ¹ CONHR ³ NHOCR ² , wherein R ¹ CO- and R ² CO- are a fatty acid residue,
-NHR ³ NH- is a diamine residue. The fatty acid in the present invention is preferably a saturated or unsaturated fatty acid having 6 to 22 carbon atoms, the diamine is preferably a diamine having 1 to 15 carbon atoms, particularly preferably an alkylenediamine, and the bisamide is preferably a 13 to 15 carbon atom. With a molecular weight of 20
0-800 N, N'-alkylenebisamides are preferred. Specifically, N, N'-methylenebisstearic acid amide, N, N'-ethylenebispalmitic acid amide,
Examples thereof include N, N'-methylenebislauric amide, linoleic amide, caprylic amide, and stearic amide. Among them, the bisamide represented by the following general formula is particularly preferable.

[0044]

## STR1 ## RCONH of (CH _{2) n} NHOCR wherein, RCO- represents the fatty acid residue, n is 1 or 2.

These fatty acid amides and / or fatty acid bisamides are used in the composition for forming a coating film in an amount of 3 to 10%.
% By weight. When the content of the fatty acid amide and / or the fatty acid bisamide is less than 3% by weight, it is difficult to obtain a sufficient adhesive force, and the slipperiness and the blocking resistance tend to decrease. The adhesion between the film and the coating film tends to decrease, the adhesion between the coating film and the glass adhesive decreases, the coating film becomes brittle, and the haze tends to increase.

The slippery adhesive layer in the present invention preferably has a coefficient of friction of 0.8 or less, more preferably 0.6% or less. The coefficient of friction of the slippery adhesive layer is 0.
If it exceeds 8, winding property and processing workability are poor, and smooth film formation and processing cannot be performed. Means for forming the slippery adhesive layer having such a coefficient of friction include a mean particle size in the coating film of the slippery adhesive layer of 0.15 μm or less, particularly 0.01 to 0.1 μm.
Of a roughening substance. Specific examples of the surface roughening material include calcium carbonate, magnesium carbonate, calcium oxide, zinc oxide, magnesium oxide,
Inorganic fine particles such as silicon oxide, sodium silicate, aluminum hydroxide, iron oxide, zirconium oxide, barium sulfate, titanium oxide, tin oxide, antimony trioxide, carbon black, molybdenum disulfide, etc., acrylic cross-linked polymer, styrene cross-linked Polymer, cross-linked silicone resin, fluororesin,
Organic fine particles such as a benzoguanamine resin, a phenol resin, a nylon resin, and a polyethylene wax can be exemplified. Among these, it is preferable to select ultrafine particles having a specific gravity of not more than 3 for the water-insoluble solid substance to avoid settling in the aqueous dispersion.

These surface-roughening substances roughen the surface of the coating film and have the effect of reinforcing the coating film with the fine powder itself.
Further, it has an effect of imparting blocking resistance to the coating film and an effect of imparting slipperiness to the laminate. The preferable addition amount of the roughening substance is 5 to 30% by weight in the composition for forming a coating film. In particular, when relatively large particles having an average particle size of 0.1 μm or more are used, the range is from 5 to 10% by weight, and when particles having an average particle size of 0.01 to 0.1 μm are used, 8 to 10% by weight.
It is preferable to select from the range of 30% by weight. If the content of these surface-roughening substances in the coating film is too large, the haze value of the obtained laminate will exceed 3%, and if it is severe, it will exceed 5%, and the transparency will deteriorate, so care must be taken. . The center line surface roughness (Ra) of the slippery adhesive layer to which the surface roughening substance is added is preferably 2 to 10 nm. Ra
Is less than 2 nm, it is difficult to achieve the above-mentioned coefficient of friction,
At the time of winding the laminate, the winding appearance becomes poor due to lack of slipperiness, which hinders subsequent operations. On the other hand, when Ra of the slippery adhesive layer exceeds 10 nm, transparency is deteriorated, and haze tends to exceed 5%.

In the present invention, the slippery adhesive layer is formed by applying an aqueous solution, an aqueous dispersion or an emulsion of the above-mentioned composition comprising an aqueous polyester and an amide of a fatty acid and / or a bisamide of a fatty acid by a roll coating method, a gravure coating method, or the like. Roll brush method, spray coat method, air knife coat method,
It can be preferably formed by an impregnation method, a curtain coating method, or the like. Further, in order to form a coating film, a resin other than the aqueous polyester, a surface roughening substance, an antistatic agent, a surfactant, an ultraviolet absorber, and the like can be added as necessary. The application of the coating solution to the biaxially oriented film can be performed at any stage, and is preferably performed in the process of forming the biaxially oriented film, particularly in the stage until the orientation and crystallization of the biaxially oriented film is completed. It is preferred to apply.
Here, the stage until the crystal orientation is completed, the unstretched film, a uniaxially oriented film in which the unstretched film is oriented in either the longitudinal direction or the transverse direction, and further in two directions, the longitudinal direction and the transverse direction. And low-magnification stretch-oriented films (biaxially stretched films before final re-stretching in the vertical or horizontal direction to complete oriented crystallization). Among these, it is preferable to apply a coating solution of the above composition to a uniaxially stretched film oriented in one direction, and to perform transverse stretching and heat fixing as it is, and thus obtain a slippery adhesive layer. Exhibits strong bonding strength with the biaxially oriented polyester film of the base film. If necessary, the coating film may be formed on only one side of the film, or may be formed on both sides. The coating amount of the coating solution is such that the coating film thickness is 70 to 100 nm, preferably 75 to 95 nm.
The amount is preferably in the range of If the thickness of the coating is less than 70 nm, the adhesive strength is insufficient, and if it is too thick and exceeds 100 nm, blocking occurs,
The haze value may be high.

When the coating liquid is applied to the film, a physical treatment such as a corona surface treatment, a flame treatment, a plasma treatment, or the like is applied to the coated surface in advance as a preliminary treatment for improving coatability, or It is preferable to use a chemically inert surfactant together with the composition. This surfactant promotes the wetting of the aqueous coating liquid on the polyester film, and includes, for example, polyoxyethylene alkylphenyl ether, polyoxyethylene-fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, fatty acid metal soap, Examples thereof include anionic and nonionic surfactants such as alkyl sulfates, alkyl sulfonates, and alkyl sulfosuccinates.

In the biaxially oriented film having an easily adhesive layer according to the present invention, when the easily slippery adhesive layer is formed on the back surface (in the case of a double-sided coating, any single surface), light in the visible light region is viewed from the side of the biaxially oriented film. Is incident on the surface at an angle of 45 degrees, the reflectance at the interface between the easily slippery adhesive layer and the biaxially oriented film (hereinafter sometimes referred to as the back surface reflectance) is 0.
It is preferably at most 4%. 0.4% back reflectance
If it exceeds, the effect on surface reflection cannot be ignored, and when used as an optical laminate for an antiglare film of a display, reflection of extraneous light becomes obstructive due to interference between front surface reflection and back surface reflection. , Visibility is easily lost. In order to make the back surface reflectivity 0.4% or less, the refractive index (nz) in the thickness direction of the coating film is preferably set to 1.50 to 1.60. When nz deviates from the above range, the rear surface reflection in the visible light region easily exceeds 0.4%. If the refractive index exceeds this range, the influence of back surface reflection becomes apparent, and in some cases, it becomes difficult to prevent reflection when an antireflection layer described later is provided. The thus obtained transparent substrate film having the easily slippery adhesive layer has excellent transparency while being excellent in surface slipperiness and adhesiveness.

In the present invention, when the aforementioned colorant is contained in a transparent substrate film, for example, a biaxially oriented polyester film, the colorant may be dispersed or dissolved in ethylene glycol or the like and added at the polymerization stage. Alternatively, a pellet or a pellet of the polyester resin to which a coloring agent having a higher concentration than the film addition concentration is added or a dye itself may be melt-solidified, and these may be mixed with the polyester and added. The latter method is preferable from the viewpoint of productivity of the film, prevention of foreign matter mixing and simplification of the process. In melting and solidifying the dye, a binder may be appropriately added. In the mixing method, particularly in the case of pellets obtained by melting and solidifying the dye, the mechanical properties are different from those of the polyester resin pellets. As a property of the coloring agent to be added to the polyester, those having a small decrease in the viscosity of the polyester resin during extrusion of the polyester are preferable from the viewpoint of productivity.

[Colored Layer] In the colored hard coat film of the present invention, a colorant may be mixed in one or more of the transparent substrate film, the hard coat layer and the adhesive layer. Is also good. As the resin used for the colored layer, an ionizing radiation-curable resin, a thermosetting resin, or a thermoplastic resin can be used. A coloring agent is adjusted so that the transmittance of the entire colored hard coat film is 40% or more, and the resultant is added to a resin to produce a colored layer resin composition. The coating method of the colored layer resin composition includes roll coating, gravure coating, bar coating,
What is necessary is just to select suitably according to the characteristic of paints, such as an extrusion coat, and application amount. Needless to say, a coating method known per se can also be employed when coating on the transparent substrate film, and the coating can be performed at any stage. Specifically, it may be performed in the process of forming a transparent substrate film,
It may be performed after film formation. In application, a suitable solvent that can dissolve the composition may be used, or an aqueous solution, aqueous dispersion, or emulsion of the composition may be used. In addition, when performing in the process of forming the transparent substrate film,
It is desirable to apply an aqueous solution, aqueous dispersion or emulsion of the above composition.

Further, the colored layer may be applied as the slippery adhesive layer by using an aqueous solution having the above composition in the process of forming a transparent base material.

[Hard Coat Layer] The material of the hard coat layer is not particularly limited, as long as it exhibits a practically usable hardness such as an ionizing radiation curable resin, a thermosetting resin, and a thermoplastic resin. Preferably, it is an ionizing radiation-curable resin that can easily form a film on a transparent base film and easily raises the pencil hardness to a desired value.

As the ionizing radiation-curable resin used for forming the hard coat layer, those having an acrylate-based functional group are preferable, and polyester acrylate or urethane acrylate is particularly preferable. The polyester acrylate is composed of an acrylate and / or methacrylate of an oligomer of a polyester polyol (hereinafter, acrylate and methacrylate are sometimes referred to as (meth) acrylate). Further, the urethane acrylate is formed by acrylate-forming an oligomer comprising a polyol compound and a diisocyanate compound. In addition, as monomers constituting acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2ethylhexyl (meth) acrylate, methoxyethyl (meth) acrylate, butoxyethyl (meth) acrylate And phenyl (meth) acrylate.

When it is desired to further increase the hardness of the hard coat layer, a polyfunctional monomer can be used in combination. Specific examples of the polyfunctional monomer include, for example, trimethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, and pentaerythritol tri (meth) acrylate , Dipentaerythritol hexa (meth) acrylate, 1,6 hexanediol di (meth)
Examples include acrylate and neopentyl glycol di (meth) acrylate.

Examples of the polyester oligomer used for forming the hard coat layer include adipic acid and glycol (such as ethylene glycol, polyethylene glycol, propylene glycol, butylene glycol, and polybutylene glycol) and triol (such as glycerin and trimethylolpropane). Examples thereof include polyadipate triol, which is a condensation product of an acid and glycol or triol, or polysebacate polyol. Note that some or all of the aliphatic dicarboxylic acids may be substituted with other organic acids. In this case, as the other organic acid, isophthalic acid, terephthalic acid, phthalic anhydride, or the like is preferable because the hard coat layer exhibits high hardness.

The polyurethane oligomer used for forming the hard coat layer can be obtained from a condensation product of a polyisocyanate and a polyol. Specific polyisocyanates include methylene bis (p-phenylene diisocyanate), an adduct of hexamethylene diisocyanate / hexanetriol, hexamethylene diisocyanate, tolylene diisocyanate, an adduct of tolylene diisocyanate trimethylolpropane,
1,5-naphthylene diisocyanate, thiopropyl diisocyanate, ethylbenzene-2,4-diisocyanate, 2,4-tolylene diisocyanate dimer, hydrogenated xylylene diisocyanate, tris (4-phenyl isocyanate) thiophosphate and the like. Can be illustrated,
As specific polyols, polyether-based polyols such as polyoxytetramethylene glycol,
Examples include polyester-based polyols such as polyadipate polyol and polycarbonate polyol, and copolymers of acrylic esters and hydroxyethyl methacrylate.

Further, when an ultraviolet-curable resin is used as the ionizing radiation-curable resin, acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxime esters or thioxanthones are contained in these resins. As a photopolymerization initiator,
It is preferable to use a mixture of n-butylamine, triethylamine, tri-n-butylphosphine and the like as a photosensitizer.

It should be noted that urethane acrylate is rich in elasticity and flexibility and excellent in workability (bendability), but it is difficult to obtain a surface acrylate having a hardness of 2H or more, because of its insufficient surface hardness. On the other hand, polyester acrylate can form a hard coat layer having extremely high hardness by selecting the constituent components of polyester. Therefore, a hard coat layer in which 40 to 10 parts by weight of a polyester acrylate is blended with 60 to 90 parts by weight of a urethane acrylate because both high hardness and flexibility are easily achieved.

Incidentally, the coating liquid used to form the hard coat layer has a secondary particle size of 2 for the purpose of adjusting the gloss and imparting a surface slip (not a releasability).
It is preferable to add 0.3 to 3 parts by weight of inert fine particles of 0 μm or less to 100 parts by weight of the resin component. 0.3
When the amount is less than 3 parts by weight, the effect of improving the slipperiness is poor. On the other hand, when the amount exceeds 3 parts by weight, the pencil hardness of the obtained hard coat layer may decrease. As the inert fine particles to be added to the coating liquid, silica, magnesium carbonate, aluminum hydroxide,
In addition to inorganic fine particles such as barium sulfate, fine particles of organic polymers such as polycarbonate, acrylic resin, polyimide, polyamide, polyethylene naphthalate, and melamine resin can be exemplified.

The coating method for forming the hard coat layer may be a conventionally known method such as a roll coat, a gravure coat, a bar coat, an extrusion coat, etc., depending on the properties of the coating solution and the amount of coating. Just choose.

[Adhesive Layer] The adhesive layer may be appropriately selected from known adhesives and adhesives, and is not particularly limited. Preferably, a mixture of an adhesive resin having a low glass transition temperature or a thermoplastic elastomer having a rubber elasticity and a wax, since the adhesive resin has an excellent adhesive property, while having an appropriate adhesiveness, and has an excellent re-peeling property with little adhesive residue at the time of peeling. It is an adhesive layer using an adhesive consisting of:

Examples of the adhesive resin having a low glass transition temperature include acrylic resins and silicone resins. Examples of the thermoplastic elastomer having rubber elasticity include ethylene-vinyl acetate copolymer, butadiene rubber,
Styrene-butadiene rubber, nitrile rubber, nitrile
Synthetic rubber such as butadiene rubber, high styrene rubber, and acrylic rubber, and natural rubber can be exemplified.

The pressure-sensitive adhesive layer may be covered with a release film (also referred to as a separate film) if necessary. As the release film, any ordinary paper material, silicone release paper, plastic film, or silicone release film can be used without particular limitation.

[Coating film curing method] The coating film of each layer described above may be cured for each layer, or may be cured simultaneously.
In particular, when using an ultraviolet-absorbing resin composition in two or more layers, the following curing method is preferably employed because the coating film can be effectively cured.

First, when the coating film of the ultraviolet-curable resin composition other than the outermost surface layer is irradiated with ultraviolet light in a half-cured state to simultaneously cure each coating film, it reacts with the wavelength characteristics of the ultraviolet light source used for ultraviolet irradiation. A photo-curing initiator having a different peak in an absorption wavelength region is mixed into each of a plurality of coating layers of the ultraviolet-curable resin composition. Then, by adding a photocuring initiator having a different peak in the absorption wavelength range for each coating layer, the curing of the coating film of each layer can be arbitrarily adjusted, and effective curing can be performed. . In other words, a cured coating film that improves the adhesion between the base material and each coating film of a plurality of layers by effectively utilizing a selective wavelength that tends to be different for each layer depending on the wavelength range of the irradiation spectrum of the ultraviolet light source. Can be.

[Antireflection Layer] The antireflection layer used in the present invention is not particularly limited as long as it does not impair the above-mentioned optical properties of the colored hard coat film. Specific examples of the antireflection layer include (1) MgF _{2 having a} thickness of about 0.1 μm.
(2) an anti-reflection layer formed of a metal vapor-deposited film, (3) a layer made of a material having a refractive index of light lower than that of the hard coat layer. An antireflection layer provided thereon, (4) a high refractive index layer having a high refractive index is provided on the hard coat layer, and a low refractive index having a lower refractive index than the high refractive index layer is provided on the high refractive index layer. An antireflection layer provided with a layer (for example, a layer in which an ultrafine particle layer of a metal oxide having a high refractive index is unevenly distributed in a portion of the antireflection layer in contact with the hard coat layer); (6) a lower refractive index than the high refractive index layer inside the high refractive index layer having a high refractive index (the display surface side when bonded to the display surface). A medium refractive index layer is provided, and outside the high refractive index layer having a high refractive index (when bonded to the display surface) A lower low refractive index layer having a refractive index antireflection layer can be exemplified provided than middle refractive index layer in different side) of the display surface.

Among these, since the antireflection can be performed more effectively, the medium refractive index is formed via the hard coat layer 4 on the transparent substrate film 1 as shown in the colored hard coat film of FIG. Layer 51, high refractive index layer 52,
It is preferable that the low refractive index layer 53 is formed in this order. Further, the low refractive index layer 53, the middle refractive index layer 51, and the high refractive index layer 52 are made of SiOx, the refractive index of the low refractive index layer 53 is larger than 1.4, and the refractive index of the high refractive index layer 52 is Less than 2.2, the low refractive index layer 53 has a thickness of 80 to 110 nm, the high refractive index layer 52 has a thickness of 30 to 110 nm, and the middle refractive index layer 51 has a thickness of 50 to 100 nm. (D = n · d, where n: refractive index of medium refractive index layer, d = thickness of medium refractive index layer)
Is preferably an antireflection layer having a wavelength of visible light or less.

[Anti-fouling layer] The anti-fouling layer used in the present invention is preferably a fluorine-based or silicone-based resin used as a water-repellent paint. For example, when the low refractive index layer of the antireflection layer is formed of SiO ₂ , a fluorosilicate-based water-repellent paint is preferred.

[0071]

EXAMPLES Hereinafter, the present invention will be described in more detail by way of examples. In addition, each characteristic value in an Example was evaluated by the following methods.

(1) Total light transmittance and haze value The total light transmittance Tt (%) was measured using a haze measuring device (NDH-20) manufactured by Nippon Denshoku Industries Co., Ltd. in accordance with JIS K6714-1958. The scattered light transmittance Td (%) was measured. The obtained total light transmittance was evaluated according to the following criteria.
The above are practically acceptable and evaluation 3 is extremely excellent. 3: Total light transmittance of 60% or more 2: Total light transmittance of 40% or more and less than 60% 1: Total light transmittance of less than 40% Further, the measured total light transmittance Tt (%) and scattered light transmittance Td ( %), The haze (%) was calculated from the following equation.

[0073]

## EQU16 ## Haze (%) = (Td / Tt) 100 The obtained haze value was evaluated according to the following criteria. 5: Haze value ≤ 2.0% (very good with little haze) 4: 2.0% <Haze value ≤ 3.0% (Haze value is small and good for practical use) 3: 3.0% < Haze value ≦ 5.0% (haze value having no practical problem) 2: 5.0% <haze value ≦ 10% (haze may have some practical problems) 1: 10% <haze value (haze value) Is too large for practical use)

(2) Light Transmission Characteristics of Visible Light having a Wavelength of 400 to 650 nm The transmittance of visible light having a wavelength of 400 to 650 nm was measured using a spectrophotometer MPC3100 manufactured by Shimadzu Corporation.

(3) Contrast With respect to the light emitting test CRT arranged so that the display surface is orthogonal to the horizontal direction, the contrast is higher by 45 than the horizontal direction.
A 30 W fluorescent lamp is illuminated from a position at an angle of °, and the maximum luminance on the screen is measured by a luminance meter (manufactured by Minolta) at a position at an angle of 30 ° above an almost horizontal direction where specularly reflected light does not directly enter. In addition, the test CRT, which has not been illuminated and whose power is turned off, is located above the horizontal direction by 4 degrees.
A 30 W fluorescent lamp is illuminated from an angle of 5 °, and the lowest luminance on the screen is measured by a luminance meter (Minolta) at an angle of 30 ° above a substantially horizontal direction where specular light is not directly incident. Then, the obtained maximum luminance is divided by the minimum luminance to obtain a contrast 1 (maximum luminance / minimum luminance).
Next, the pressure-sensitive adhesive side of the test sample was adhered to the CRT by pressing, and the maximum luminance and the minimum luminance were measured again in the same manner as described above, and the obtained maximum luminance was divided by the minimum luminance to obtain a contrast 2 (maximum luminance). / Lowest luminance). The larger the value of (contrast 2 / contrast 1) × 100 (%), the better the evaluation was based on the following criteria. ：: (contrast 2 / contrast 1) × 100
(%) Is 120% or more ：: (contrast 2 / contrast 1) × 100
(%) Is 100% or more and less than 120% ×: (contrast 2 / contrast 1) × 100
(%) Is 100% full

(4) Saturation From the transmission spectrum of the test film to the standard light A, J
L *, a *, and b * in the L * a * b * color system are determined according to IS Standard Z8729, and a is determined by the following equation.
The b chroma (C * ab) was calculated.

[0077]

C * ab = {(a *) ² + (b *) ² } ^{0.5 From the} obtained C * ab, the deviation of the saturation from the achromatic color was evaluated according to the following criteria. ◎: C * ab is less than 10 ：: C * ab is 10 or more and less than 20: C * ab is 20 or more

(5) Color Purity The chromaticity coordinates (CIE color system) of each luminous body (blue, green, red) emitted from the CRT were calculated according to JIS standard Z8701. In the same manner, the chromaticity coordinates of each illuminant after attaching the test sample to the cathode ray tube were calculated, and the color purity of the three primary colors was evaluated based on the following criteria. However, by attaching the sample, the chromaticity coordinates of each illuminant can be changed to a single wavelength (460 nm, 560 nm, 620 nm).
(nm), it is determined that the color purity has been improved. ◎: The color purity of all three primary colors was improved. ：: Of the three primary colors, two colors were improved, but the remaining one color was reduced. Δ: Any one was improved, but the others were reduced. X: All were reduced or No change

[Example 1] Dye (trade name, manufactured by Mitsui Chemicals, Inc.)
HS-299) in an amount of 0.01% by weight and an average particle size of 1.7.
Polyethylene terephthalate containing 0.007% by weight of a porous silica of μm (intrinsic viscosity [η] = 0.65)
Was extruded from a die in a molten state, and cooled with a cooling drum by a conventional method to obtain an unstretched film. Subsequently, the unstretched film was continuously wound without being wound up, and subsequently, an aqueous liquid having a concentration of 8% of the coating composition shown below was uniformly applied to both surfaces thereof by a roll coater. Thereafter, while drying at 95 ° C., the film was stretched 3.8 times at 120 ° C. in the transverse direction.
Tension heat treatment was performed at 0 ° C. to obtain a colored biaxially oriented polyester film having a thickness of 188 μm.

[Coating Composition] The acid component was 2,6-naphthalenedicarboxylic acid (70 mol%), isophthalic acid (24 mol%), sodium 5-sulfoisophthalate (6 mol%), and the glycol component were 75% by weight of Tg 85 ° C copolymerized polyester synthesized from ethylene glycol (90% by mole) and diethylene glycol (30% by mole) 15% by mole of methyl methacrylate, 75% by mole of ethyl acrylate, 5% by mole of N-methylolacrylamide Acrylic copolymer having a Tg of 0 ° C. synthesized from 5 mol% of 2-hydroxyethyl methacrylate 15% by weight Polyoxyethylene (n = 7) lauryl ether 10% by weight

A hard coat agent (trade name: PETD-31, manufactured by Dainichi Seika) for forming a hard coat layer was dried on one side of the obtained colored biaxially oriented polyester film by a roll coat method. After coating to a thickness of 6 μm and drying, an electron beam was applied at 175 kv and 10 kV.
Irradiation was performed under the conditions of Mrad to form a hard coat film.

On the other hand, a pressure-sensitive adhesive for forming a pressure-sensitive adhesive layer (composition is shown in Table 1) is coated on the surface opposite to the hard coat layer laminated on the colored biaxially oriented polyester film by a roll coating method. Coating was performed so that the dry thickness became 20 μm, and a colored hard coat film having a layer configuration 1 shown in FIG. 1 was obtained. On the surface of the pressure-sensitive adhesive layer of the obtained colored hard coat film, a PET film obtained by subjecting a surface having a thickness of 50 μm to silicone treatment to a separator film (peeling film)
And pasted together. Table 5 shows the properties of the obtained colored hard coat film.

[0083]

[Table 1]

Example 2 The same as Example 1 except that no colorant was added to the transparent substrate, and that the pressure-sensitive adhesive layer for forming the pressure-sensitive adhesive layer was changed to the composition shown in Table 2 below. These operations were repeated to obtain a colored hard coat film having a layer configuration 2 shown in FIG. Table 5 shows the properties of the obtained colored hard coat film.

[0085]

[Table 2]

Example 3 The dry thickness of the hard coat layer was determined by adding no colorant to the transparent substrate and adding a hard coat agent for forming the hard coat layer to the composition shown in Table 3 below. The same operation as in Example 1 was repeated except that the electron beam irradiation at the time of forming the hard coat layer was changed to 1020 Mrad at 185 kv to 20 μm, and the colored hard coat film having the layer configuration 3 shown in FIG. Obtained. Table 5 shows the properties of the obtained colored hard coat film.
Shown in

[0087]

[Table 3]

Example 4 One side of a polyethylene terephthalate film (trade name: OPFW-188, manufactured by Teijin Limited) having a thickness of 188 μm and subjected to an easy-adhesion treatment on both sides,
A color coating agent for forming a colored layer (composition is shown in Table 4) is applied by a roll coating method so that a dry thickness becomes 10 μm, and after drying, an electron beam is applied under the conditions of 175 kv and 5 Mrad. Irradiation yielded a laminate of the colored layer and the transparent substrate film.

[0089]

[Table 4]

Next, a hard coat agent (trade name: PETD-31, manufactured by Dainichi Seika) for forming a hard coat layer was applied to the surface of the transparent base material film of the laminate by a roll coating method to obtain a dry thickness. After coating to 6 μm and drying, an electron beam was irradiated under the conditions of 175 kv and 10 Mrad to form a hard coat film. On the other hand, an adhesive for forming an adhesive layer on the surface of the colored layer of the laminate (manufactured by Soken Chemical Co., Ltd., trade name: SK Dyne 1425 (D-90))
Was applied by a roll coating method so as to have a dry thickness of 20 μm to obtain a colored hard coat film having a layer constitution 4 shown in FIG. On the surface of the adhesive layer of the obtained colored hard coat film, a PET film having a surface having a thickness of 50 μm and subjected to silicone treatment was bonded as a separator film (release film). Table 5 shows the properties of the obtained colored hard coat film.

Example 5 Example 4 was repeated except that the position of the colored layer was changed from between the pressure-sensitive adhesive layer and the transparent substrate film to between the hard coat and the transparent substrate film. The same operation was repeated. Table 5 shows the properties of the obtained colored hard coat film.

[Example 6] As a shaped film, a thickness of 50
A μm biaxially stretched polyethylene terephthalate film (trade name: A31-50, manufactured by Teijin Limited) is prepared, and ZrO ₂ fine particles (trade name: No. 1275, manufactured by Sumitomo Osaka Cement Co., Ltd.) are provided on one surface. A) a coating liquid prepared with a binder resin (an ionizing radiation-curable organosilicon compound) containing 0.3 part by weight of a coating liquid with respect to 100 parts by weight), and applying a dry thickness (dry thickness) ) Formed an uncured coating film for forming a medium refractive index layer (refractive index: 1.74) of 57 nm.

Next, a laminate of the colored layer and the transparent base film before forming the hard coat layer used in Example 4 was prepared, and the hard coat layer was coated on the transparent base film of the laminate. An agent (manufactured by Dainichi Seika, trade name: PETD-31) was applied by a roll coating method so that the dry thickness became 6 μm, and the solvent component was dried to form an uncured hard coat layer. Then, the uncured medium refractive index layer provided on the shaping film and the uncured hard coat layer provided on the surface of the transparent substrate film of the laminate are laminated and pressed so as to be in contact with each other. Irradiation was performed at 480 mJ (10 m / min) to cure the uncured middle refractive index layer and the hard coat layer to form a cured middle refractive index layer and a hard coat layer. The shaping film bonded to the surface was peeled off and removed to obtain a colored hard coat film composed of a colored layer, a transparent substrate film, a hard coat layer, and a medium refractive index layer.

Further, an ITO sputtering (refractive index:
2.0, vacuum degree 5 × 10 −6 torr, substrate temperature at room temperature, argon 100 scc / min, oxygen 5 scc
/ Min) to form a high refractive index layer having a thickness of 105 nm at a deposition rate of 1.6 Å / s. Next, SiO (refractive index: 1.46) was further added to the surface of the high refractive index layer of the colored hard coat film,
A low refractive index layer having a thickness of 85 nm was formed at a degree of vacuum of 5 × 10 ⁻⁶ torr, a substrate temperature of room temperature, a deposition rate of 26 Å / s, and a thickness of 85 nm. Furthermore, a fluorosurfactant (trade name: FC-722, manufactured by 3M Co.) is coated on the surface of the low refractive index layer of the colored hard coat film with a wire bar to form a 2 nm-thick antifouling layer. Formed. On the other hand, on the surface of the colored layer of the colored hard coat film, an adhesive for forming the adhesive layer used in Example 1 was applied by a roll coating method to form an adhesive layer having a dry thickness of 20 μm. Thus, an antireflection colored hard coat film having the antifouling property of the layer configuration 6 shown in FIG. 6 was obtained. The surface of the pressure-sensitive adhesive layer of the obtained colored hard coat film was protected by a silicone-treated 50 μm-thick protective film from the viewpoint of handling. Table 5 shows the properties of the obtained colored hard coat film.

Comparative Example 1 A hard coat film having the same structure as in Example 1 was obtained except that no coloring agent was added. Table 5 shows the properties of the obtained hard coat film.

Comparative Example 2 The same operation as in Example 1 was repeated except that the coloring agent was changed to Nippon Kayaku dye (trade name: Kayset Blue A2R), and the added amount was changed to 20 parts by weight. Table 5 shows the properties of the obtained colored hard coat film.

Comparative Example 3 The same operation as in Example 1 was repeated, except that the coloring agent was changed to Nippon Kayaku dye (trade name: Kayset BlackAN) and the added amount was changed to 20 parts by weight. Table 5 shows the properties of the obtained colored hard coat film.

[Comparative Example 4] Pigment Ca manufactured by Dainichi Seika was used as a coloring agent.
rbon Black (trade name: 4818 Black 1)
5F-7), and the same operation as in Example 1 was repeated, except that the addition amount was changed to 20 parts by weight. Table 5 shows the properties of the obtained colored hard coat film.

[0099]

[Table 5]

Here, the coloring agents A to F in Table 5 above represent the following dyes or pigments. A: Mitsui Chemical dye (trade name; HS-299) B: Mitsui Chemical dye (trade name: HS-307) and Nippon Kayaku dye (Kayaset Yellow EG)
C: Mitsui Chemical Dye (trade name: HS-296), Nippon Kayaku Dye (trade name: Kayaset Orange A)
N) and Nippon Kayaku dyes (trade name: Kayaset)
GreenAB) in a weight ratio of 10: 3: 3. D: Nippon Kayaku Dye (trade name: Kayaset Blu)
eA2R) E: Nippon Kayaku dye (Kayaset Bla)
ckAN) F: Pigment manufactured by Dainichi Seika (trade name; CarbonBlack)
4818Black15F-7.5)

[0101]

The colored hard coat film of the present invention is
By sticking and using the transparent substrate surface, which is the outermost surface of the display device, it is possible to realize a color image with high color purity and high contrast, which was difficult to produce with a conventional glass display device. In addition, the scratch resistance of the display surface of the display device can be improved.

Further, since the colored hard coat film of the present invention is bonded to the display surface of a display device, a conventional CRT can be used.
A flat CRT glass formed so that the curvature of the phosphor surface side and the outer surface side of the CRT glass are different from each other, which cannot be achieved by a method of coloring the glass, particularly a flat CRT glass for a high-definition display, and a CRT for a high-definition television and the like. Plane CR
Improvements in color purity and contrast of a display device using T glass are also achieved.

That is, the colored hard coat film of the present invention is excellent in durability and is formed so that, for example, the curvature is different between the phosphor surface side and the outer surface side of the CRT glass by being attached to the surface of various display devices. Flat CRT
By affixing to a surface of glass, particularly a flat CRT glass for a high-definition display or a flat CRT glass for a CRT such as a high-quality terepi, it is possible to prevent the occurrence of color unevenness as seen in colored glass. In addition, the contrast, color purity, and saturation can be improved.

The colored hard coat film of the present invention can be used not only as a display surface of a display device such as a CRT, but also as a surface protective sheet for window glass, showcases, glasses, instruments, photographs, paintings, illustrations, signs, etc. Can be used suitably,
Its industrial value is extremely high.

[Brief description of the drawings]

FIG. 1 shows a layer configuration 1 which is an example of the colored hard coat film of the present invention.

FIG. 2 shows a layer configuration 2 which is an example of the colored hard coat film of the present invention.

FIG. 3 shows a layer configuration 3 which is an example of the colored hard coat film of the present invention.

FIG. 4 shows a layer configuration 4 which is an example of the colored hard coat film of the present invention.

FIG. 5 shows a layer configuration 5 which is an example of the colored hard coat film of the present invention.

FIG. 6 shows a layer constitution 6 which is an example of the colored hard coat film of the present invention.

FIG. 7 is a graph showing a transmittance curve with respect to visible light of the colored hard coat film used in Example 1 of the present invention.

FIG. 8 is a graph showing emission spectra of blue, green, and red phosphors on a phosphor screen of a cathode ray tube.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transparent substrate film 2 colored layer 3 adhesive layer 4 hard coat layer 5 antireflection layer 6 antifouling layer 21 colored transparent substrate film 23 colored adhesive layer 24 colored hard coat layer 51 medium refractive index layer 52 high refractive index layer 53 low Refractive index layer

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02B 5/22 G02B 1/10 Z (72) Inventor Masayuki Fukuda 3-37-19 Koyama, Sagamihara City, Kanagawa Prefecture Teijin Limited Sagamihara Research Center F-term (Reference) 2H048 CA04 CA13 CA19 CA24 CA25 2K009 AA02 AA06 AA15 BB02 CC06 CC21 EE01 EE05 4F100 AK01A AK25 AK42 AL01 AT00A BA05 BA07 BA10B BA10E CA13A CA13B CA13C CA13E JBJJ13 CA13E CA13E JL10E JL13C JN01A JN06D JN08 5G435 AA02 AA04 BB02 BB12 CC12 GG11 GG43 HH02 HH05

Claims (12)

[Claims] 1. A hard coat film comprising a transparent base material film and a hard coat layer provided on one surface of the transparent base film and containing a colorant, wherein the light transmission characteristics in visible light satisfy the following general formula: A colored hard coat film, characterized in that: 560 nm ≦ X ≦ 610 nm (2) Y ≦ 80 nm (3) T _abs / T ₅₄₀ <0.8 (4) 0.5 ≦ T ₆₂₀ / T ₅₄₀ ≦ 1.5 (5) 0.5 ≦ T ₄₅₀ / T ₅₄₀ ≦ 1.5 (where X is the wavelength of the maximum absorption peak in visible light having a wavelength of 540 to 630 nm, and Y is the wavelength of 540 to 630 n.
m, the half width of the maximum absorption peak in visible light, T _abs
Is the light transmittance at the maximum absorption peak wavelength in the visible light of 540 to 630 nm, T ₄₅₀ is the light transmittance at the wavelength of ₄₅₀ nm, T ₅₄₀ is the light transmittance at the wavelength of ₅₄₀ nm, and T ₆₂₀ is the light transmittance at the wavelength of ₆₂₀ nm. is there. ) 2. The colored hard coat film according to claim 1, wherein the colored hard coat film has an adhesive layer on a surface of the transparent substrate film. 3. The colored hard coat film according to claim 1, wherein the colored hard coat film has an antireflection layer on the surface of the hard coat layer. 4. The colored hard coat film according to claim 3, wherein the colored hard coat film has an antifouling layer on the surface of the antireflection layer. 5. The colored hard coat film according to claim 1, wherein the transparent substrate film contains a coloring agent. 6. The colored hard coat film according to claim 1, wherein the hard coat layer contains a coloring agent. 7. The adhesive layer according to claim 2, wherein the adhesive layer contains a coloring agent.
The colored hard coat film according to the above. 8. The colored hard coat film according to claim 1, having a colored layer between the transparent substrate film and the hard coat layer, wherein the colored layer contains a colorant. 9. The method according to claim 2, further comprising a coloring layer between the transparent substrate film and the adhesive layer, wherein the coloring layer contains a coloring agent.
The colored hard coat film according to the above. 10. The colored hard coat film according to claim 1, wherein the total light transmittance of visible light having a wavelength of 400 to 650 nm is 40% or more. 11. The colorant is at least one selected from the group consisting of anthraquinone dyes, quinacdrine dyes, pyrinone dyes, polymethine dyes, pyromethene dyes, porphyrin dyes and phthalocyanine dyes.
The colored hard coat film according to any one of claims 1 to 9, which is a single dye. 12. The colored hard coat film according to claim 1, which is for sticking to a display surface of a display device.