JP2001337203A - Antireflection laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antireflection laminate which does not cause a wrong operation to a remote-control device for a television set, VTR, an audio system or the like when IR is emitted from a display itself. SOLUTION: The antireflection laminate has an IR absorbing function. Specifically the IR absorbing function is imparted to a hard coat layer and/or an adhesive layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminate having an antireflection function for reducing reflection of light rays,
The present invention relates to an optical functional laminate obtained by adding an infrared absorbing function to the optical functional laminate.

[0002]

2. Description of the Related Art Conventionally, in a CRT or the like, a multilayer film is coated by a vacuum deposition method or the like as a means for preventing reflection on the surface and a means for preventing the display screen from being charged. Further, in the liquid crystal screen, irregular reflection is made by providing irregularities on those surfaces.

As an example of satisfying these requirements,
On the surface of a transparent plastic film substrate, a high refractive index layer and a low refractive index layer made of a metal oxide or the like are laminated via a hard coat layer, or a low refractive index layer such as an inorganic or organic fluorine compound is formed as a single layer. It is known that the formed anti-reflection laminate having an anti-reflection effect over a wide range of visible light is used by bonding it to a display surface or the like.

[0004]

However, when infrared light is emitted from the display itself, the television or VT
There is a problem that a remote controller for R, audio or the like malfunctions, and it cannot be said that the above antireflection film alone is sufficient, and it is desirable to have both an antireflection function and an infrared absorption function. In particular, in a PDP (plasma display panel), a problem is that infrared rays are emitted from the display itself.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object.
The antireflection laminate has an infrared absorbing function.

According to a second aspect of the present invention, in the first aspect, an infrared absorbing function is added to the hard coat layer.

[0007] The invention described in claim 3 is claim 1 or 2.
In the described invention, the adhesive layer is provided with an infrared absorbing function.

[0008] At least one surface of the substrate has alternately laminated high refractive index layers and low refractive index layers, or laminated intermediate refractive index layers, high refractive index layers, and low refractive index layers. An anti-reflection layer having an anti-reflection layer formed by laminating an index layer, a water-repellent and / or oil-repellent antifouling layer is formed on the uppermost low refractive index layer of the anti-reflection layer, An anti-reflection laminate having a hard coat layer between the substrate and the anti-reflection layer, and an adhesive layer on the side of the substrate on which the anti-reflection layer is not provided, wherein the anti-reflection layer, the hard coat layer, and the adhesive layer Is characterized in that one or more of them have an infrared absorption function. At this time, an infrared absorbing function may be added to the substrate.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some examples of the present invention will be described below with reference to the drawings. A hard coat layer 3, an antireflection layer 2, and an antifouling layer 4 are formed on one surface of a smooth film substrate 1, and an adhesive layer 5 is formed on the back surface. FIG. 1 shows a case where the high-refractive-index layers 2a and the low-refractive-index layers 2b are alternately laminated as the antireflection layer 2 and the number of laminated layers is four.
FIG. 2 shows a case where the layers are stacked in the order of c, the high refractive index layer 2a, and the low refractive index layer 2b.

As the film substrate 1 on which the anti-reflection layer 2 is formed, a plastic film which is transparent enough to be used for a display can be used. For example, polymethyl methacrylate, polycarbonate, polystyrene, polyethylene sulfide, polysulfide Ether sulfone, polyolefin, polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose and the like can be used, and are appropriately selected depending on the purpose and application, but are not limited thereto. The thickness of the substrate is selected and set according to the type, purpose, and use of the film.
A thickness of 0 μm is preferred.

The anti-reflection layer 2 utilizes light interference and is formed to have a predetermined optical film thickness nd (product of refractive index n × shape film thickness d) in order to obtain desired reflection characteristics. FIG.
As shown in FIG. 2, a high refractive index layer 2a and a low refractive index layer 2b are alternately laminated, and a low refractive index layer 2b is formed on the uppermost layer.
As described above, the intermediate refractive index layer 2c, the high refractive index layer 2a, and the low refractive index layer 2b are laminated in this order, and the antireflection effect can be exhibited by forming the low refractive index layer 2b on the uppermost layer. .

When the infrared absorption function is provided to the antireflection layer, a material that reflects and absorbs infrared light may be used as the material to be laminated. For example, there is a method using indium tin oxide (ITO) for the high refractive index layer.

When imparting an infrared absorbing function to the hard coat layer or the adhesive layer, a method of mixing the infrared absorbing agent with each other may be used in addition to the method of using the hard coat material or the adhesive having the infrared absorbing function. is there.

[0014]

As described above, according to the present invention, a hard coat layer, an antireflection layer and an antifouling layer are formed on one surface of a smooth substrate, and an adhesive layer is formed on the back surface. . further,
By adding an infrared absorption function to one or more of the antireflection layer, the hard coat layer and the adhesive layer, an antireflection film having an infrared absorption function can be obtained. As a result, if infrared radiation is emitted from the display itself,
It is possible to solve a problem that a remote controller such as a television, a VTR, and an audio device malfunctions.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of the present invention.

FIG. 2 is a cross-sectional view of another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 base material 2 antireflection layer 2a high refractive index layer 2b low refractive index layer 2c medium refractive index layer 3 hard coat layer 4 antifouling layer 5 adhesive layer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yashiko Yoshida 1-5-1, Taito, Taito-ku, Tokyo Inside Toppan Printing Co., Ltd. (72) Inventor Kazutoshi Kiyokawa 1-5-1, Taito, Taito-ku, Tokyo No. Toppan Printing Co., Ltd. F term (reference) 2K009 AA06 AA07 AA15 BB13 BB14 BB24 BB28 CC03 EE05 FF03 4F100 AA33 AK12 AK25 AK45 AR00A AT00B BA02 BA05 CA30 CC02A GB48 JD10A JK12A JL00 JL06 J13N

Claims (3)

[Claims] 1. An anti-reflection laminate characterized by having an infrared absorbing function. 2. The antireflection laminate according to claim 1, wherein the hard coat layer has an infrared absorbing function. 3. The antireflection laminate according to claim 1, wherein the adhesive layer has an infrared absorbing function.