JPH10128898A - Resin composite panel molded body, composite sheet and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the loss of light amount smaller, prevent the malfunction of an apparatus due to near infrared radiation and the outdoor light reflection from occurring by a method wherein an antireflection film made of a low refractive index transparent fluorophastic is laminated onto the surface of a molded body consisting of a selective wavelength-absorbing sheet, which is made of a resin composition consisting of a transparent resin and a photoabsorption compound and the total ray transmittance, and the spectral ray transmittance in a visible light wavelength region thereof is specified. SOLUTION: This panel formed body is obtained body laminating an antireflection film made of a lower reflective index transparent fluoroplastic onto one side or both sides of a selective wavelength absorbing sheet, which is made of a resin composition consisting of a transparent resin such as a methacrylic resin and at least one kind or more of a photoabsorption compound, the absorbancy in the wavelength region of 400-1,100nm of which is 0.01 or more, the total ray tranmittance of which is 50-90% and, at the same time, the spectral ray tranmittance in a visible light wavelength region of 430-650nm of which is 60-85% in a visible light wavelength region of 430-480nm, 50-70% in that of 530-580nm, and 50-85% in that of 590-640nm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article of a selective wavelength-absorbing resin composite panel in which the spectral light transmittance in a specific wavelength region is controlled and the external light reflection is greatly reduced.

[0002]

2. Description of the Related Art In recent years, in the field of video equipment typified by color television, market demands for higher definition and larger screen of projected images have been added to conventional direct-view televisions using CRTs. Televisions such as a light-emitting panel type using a plasma display or the like, a non-light-emitting type panel type using a liquid crystal display or the like, and a rear projection type with a built-in video projector are coming into the market.

With the diversification of the specifications of the video equipment and the structure of the components constituting the video equipment, the structural factors of the light source or the discharge portion serving as an image signal source or the respective pixel portions constituting the image cause a change from the visible light region to the infrared wavelength region. Over
Light rays other than the wavelength bands of the three primary colors (red, green, and blue) of the color image are emitted, causing problems such as uneven color tone of the screen and malfunction of the device due to electromagnetic wave radiation.

[0004] It is preferable to solve these problems by adjusting the electric signals on the drive circuit of the video equipment, since secondary problems such as a decrease in the overall luminance of the screen and a decrease in the color resolution occur. In order to obtain a color image, light loss due to light scattering or diffusion is small, and light rays in all wavelength bands of red, green, and blue, especially human visibility are high 450 to 6
There is a demand for a material having a function of efficiently transmitting light in a wavelength band of 50 nm. On the other hand, these new types of video equipment use a resin panel on the front of the video display screen for the purpose of protecting the internal structure and the like. Since the video and image reflected on the surface in the direction of the observer and the reproduced image and image become difficult for the observer to see, improvement in prevention of external light reflection and the like is desired.

Conventionally, in order to solve the problem of lowering the color resolution of a screen, there has been a proposal to provide a video device with a material having an optical filter function of blocking light in a specific wavelength band.
For example, JP-A-58-160941 discloses a material containing a neodymium compound of a carboxylic acid in a methacrylic resin,
JP-A-4-7236 discloses a material containing a neodymium compound in a transparent resin, and JP-A-5-179147 discloses a material containing an erbium compound in a transparent resin.

However, the materials obtained by these methods for solving the problem of lowering the color resolution of the screen can only absorb light in a very narrow wavelength band, and the three primary colors of a color image, red, green and blue. Light in the wavelength range of
It cannot be said that the material has a function of efficiently transmitting light in a wavelength band of 0 to 650 nm. In addition, if the light transmittance in the visible light region is simply increased, external light due to ambient illumination or the like overlaps with the image and the contrast is lowered, which is not preferable.
When the power of the video equipment is turned off, a new problem arises in that the video display unit protrudes from the housing unit, which is undesirable. Further, as a near-infrared absorbing filter, there are proposed sunglasses or goggles for protecting the eyes from controlling the growth of plants and shielding flashes and heat rays in sunlight, arc welding and the like. For example, JP-A-54-250
No. 60, a plastic film absorbing near infrared rays, and Japanese Patent Application Laid-Open Nos. 57-198413 and 61-11704.
And JP-A-62-187302 disclose an optical filter in which a benzenedithiol-based metal complex is blended with a thermoplastic resin. However, these near-infrared absorption filters have not been proposed as a front panel of video equipment, and when used as a front panel of video equipment, the total light transmittance is low or the spectral light transmittance in the visible light wavelength range is reduced. There's a problem.

Further, as a method of preventing external light reflection, a method of forming a multilayer vapor-deposited film utilizing light interference has been proposed. For example, Japanese Unexamined Patent Publication No. 5-29237 discloses a method of forming an antireflection film directly on a panel surface by coating or the like using silicon dioxide or the like, whose average particles are ultrafine particles having a wavelength of visible light or less. JP-A-307104 and JP-A-8-144048 disclose an antireflection film in which a cured film is formed on the upper surface of a transparent plastic film, an aluminum oxide layer is formed thereon by a sputtering method, and a magnesium fluoride layer is formed by a vapor deposition method. Laminated filters, JP-A-6-160982, JP-A-7-28169,
JP-A-8-48935 and JP-A-8-122501 disclose a method of forming a low refractive index layer on a resin substrate, and the like. However, in the method of forming a multilayer vapor-deposited film as an anti-reflection film for external light, the forming process is complicated, especially when it is intended to uniformly form a large area as a front plate of a large-screen video device exceeding 40 inches, A large investment is required in combination with the necessity of increasing the size of the entire apparatus, which poses a practical problem. In addition, in the method of forming the low refractive index layer, since the thickness of the formed film is very thin, around 0.1 μm, unevenness defects on the processing surface due to dust, dirt and foreign matter in the air in the processing step. Is difficult to avoid sufficiently, and the product yield is not good. The anti-reflection film with a low refractive index layer formed on a resin substrate satisfies its performance, but it is applied to a large-screen panel so as to eliminate bubbles and unevenness and prevent warpage. It is very difficult to match.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a front panel of an image apparatus which has a small loss of light amount due to scattering and diffusion of light and effectively transmits light in a visible light wavelength range of 450 to 650 nm. Prevents malfunctions of equipment due to near-infrared radiation, and at the same time, prevents reflection of external light, so that the image contrast is high and the housing and image display unit have a sense of unity when the equipment is turned off. An object of the present invention is to provide a selected wavelength absorbing resin composite panel molded product.

[0009]

Means for Solving the Problems The present inventor has made intensive studies to solve the above-mentioned problems, and as a result, optically active in a specific wavelength region of light emitted from a light source serving as an image signal source or a discharge portion. That is, it has been found that the above object can be achieved by further laminating an anti-reflection layer for external light on the surface of a sheet molded body having a selected wavelength absorption in which a compound having light absorption properties is dispersed in a transparent resin. did.

That is, the present invention relates to a transparent resin,
It is composed of a resin composition comprising at least one or more light absorbing compounds having an absorbance of at least 0.01 in a wavelength region of 00 nm, and has a total light transmittance of 50 to 90% and 430.
The spectral light transmittance in the visible light wavelength region of 650 to 650 nm is 60 to 85% at 430 to 480 nm, and 530 to 58.
50-70% at 0 nm, 50-8 at 590-640 nm
A selective wavelength-absorbing resin composite panel molded article characterized in that an antireflection film made of a low-refractive-index transparent fluororesin is laminated on one or both sides of a selective wavelength-absorbing sheet molded article within a range of 5%. .

Further, a transparent resin, 400 to 1100 nm
Of at least one light absorbing compound having an absorbance in the wavelength range of 0.01 or more, and a total light transmittance of 50 to 90% and 430 to 650.
the spectral light transmittance in the visible light wavelength region of 430 nm is 430.
60-85% at ~ 480 nm, 5 at 530-580 nm
0-70%, 50-85% at 590-640 nm, and 800 nm or / and 900n in the near infrared wavelength region
A more preferable selection is made by laminating an antireflection film made of a low-refractive-index transparent fluororesin on one or both sides of the selected wavelength-absorbing sheet molded product having a m or / and / or a spectral light transmittance of 1100 nm of 30% or less. A molded article of the wavelength-absorbing resin composite panel is obtained.

Further, the present invention is further preferably achieved by the above-mentioned molded article of a selective wavelength absorbing resin composite panel, wherein the transparent resin is a methacrylic resin. The low-refractive-index antireflection film is made of a transparent film having a thickness of 25 to 200 μm as a base material, and a transparent fluorine-based material having a thickness of 0.05 to 0.25 μm and a refractive index of 1.28 to 1.44 on one surface thereof. This is more preferably achieved by a molded article of a selected wavelength-absorbing resin composite panel comprising at least three layers of a resin and an adhesive layer of 5 to 30 μm on one side and having a total light reflectance of less than 7%.

Further, the molded panel is made of a transparent resin,
It is composed of a resin composition comprising at least one light-absorbing compound having an absorbance of 0.01 or more in a wavelength range of 00 to 1100 nm, a total light transmittance of 50 to 90%, and a visible light wavelength of 430 to 650 nm. The spectral light transmittance in the region is 60 to 85% at 430 to 480 nm, and 530.
50-70% at ~ 580 nm, 5 at 590-640 nm
A selective wavelength-absorbing resin composite sheet or a transparent resin, wherein an antireflection film made of a low-refractive-index transparent fluororesin is laminated on one or both sides of the selective wavelength-absorbing sheet within a range of 0 to 85%. And 400 to 1100 nm
Is composed of a resin composition comprising at least one or more light-absorbing compounds having an absorbance in the wavelength range of 0.01 or more, and has a total light transmittance of 50 to 90% and 430 to 650 nm.
Has a spectral light transmittance in the visible light wavelength range of 430 to 4
60 to 85% at 80 nm, 50 to 530 to 580 nm
70%, 50-85% at 590-640 nm, and low refraction on one or both sides of a selective wavelength absorbing sheet having a spectral light transmittance of 800 nm or / and 900 nm or / and 1100 nm in the near infrared wavelength region of 30% or less. It can be easily obtained by molding using a selective wavelength absorbing resin composite sheet characterized by laminating an antireflection film made of a transparent fluororesin having a high ratio.

Further, the resin composite sheet is formed by forming a selective wavelength absorbing sheet by an extrusion sheet molding method, and subsequently, the temperature of the selective wavelength absorbing sheet before lamination is 30 to 100 ° C. This is more preferably achieved by pressing and laminating the membrane film under a tension of 1 to 10 kg / m (per roll length). The panel molded body is suitably used as a screen panel molded body installed on the front of a projection television image display unit or a plasma display image display unit. FIG. 1 shows the configuration of two types of plasma displays, an AC type and a DC type, and the molded panel of the present invention. Here, 1 is plasma, 11 is ultraviolet light, 12 is visible light, 2
Is a glass substrate, 21 is a display electrode, 22 is an address electrode,
23 is a cathode electrode, 25 is a partition, 31 is a dielectric, 32
Is a protective layer, 33 is a resistor, 34 is an insulator, 4 is a phosphor, 5
Is a panel molded body. In the plasma display,
The three kinds of phosphors 4 are optically excited by the ultraviolet rays 11 generated by the plasma 1, and the three kinds of visible light 12 emitted when relaxing the energy are three primary colors of the image. The panel molded body 5 is installed and used on the front side of the image display unit on the observer side.

Hereinafter, the present invention will be described in detail. The transparent resin used in the present invention is defined as a substance that requires a small loss of light amount due to scattering and diffusion of light and has a haze of 10% or less measured according to JIS K-7105. Specific examples include a methacrylic resin, a polycarbonate resin, a polystyrene resin, a styrene-butadiene copolymer resin, and a polyvinyl chloride resin. Particularly preferred is a methacrylic resin. The methacrylic resin that can be used in the present invention includes a resin mainly composed of methyl methacrylate, which includes a homopolymer of methyl methacrylate, or methyl methacrylate and methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, and butyl. Acrylate,
Acrylonitrile, acrylic acid, methacrylic acid, vinyl pyridine, vinyl morpholine, vinyl pyridone tetrahydrofurfuryl acrylate, N, N-dimethylaminoethyl acrylate, N, N-dimethylacrylamide, 2-hydroxy acrylate, ethylene glycol monoacrylate, glycerin monoacrylate And a copolymer with at least one copolymerizable monomer such as maleic anhydride, styrene, or α-methylstyrene, and a heat-resistant acrylic resin, a low-hygroscopic acrylic resin, and the like. These may be used alone or may be blended. The acrylic resin can be obtained by a known polymerization method such as a bulk polymerization method, a suspension polymerization method, an emulsion polymerization method, and a solution polymerization method. In order to maintain transparency and simultaneously provide impact resistance, impact-resistant acrylic resin is used. For example, JP-A-53-55854 and JP-A-55-94917 disclose an acrylic resin.
No. 61-32346, and the like. Briefly, it is obtained from a multi-stage polymer produced by a multi-stage sequential polymerization method in which an elastic layer and an inelastic layer are alternately formed around an acrylic polymer core material.

The light absorbing compound used in the present invention is 40
In order to be used selected from those having an absorbance of 0.01 or more in a wavelength range of 0 to 1100 nm, to be uniformly dispersed in a transparent resin, and to have uniform optical characteristics of the resin composition, It is preferably in powder form at 25 ° C.
Further, since the size of the light absorbing compound powder also affects the optical characteristics of the composition, the weight average particle size of the powder is 0.01 to
It is preferably in the range of 50 μm.

More specifically, as inorganic pigments, titanium dioxide, sulfur-containing sodium aluminosilicate pigments, iron ferrocyanide, ferric ferrocyanide, cobalt aluminate, chromium oxide, chromium hydroxide oxide, lead chromate , Basic lead chromate, lead sulfate, lead molybdate, cadmium sulfide, cadmium selenide, cadmium carbonate, iron oxide,
Ferric oxide, cuprous oxide, basic zinc potassium chromate, strontium chromate pigment, carbon black, etc., azo lake pigment, insoluble azo pigment, condensed azo pigment, phthalocyanine pigment, copper phthalocyanine, quinacridone pigment as an organic pigment, Isoindolinone pigments, vat pigments (anthrapyrimidine, flavanthrone, brominated ansanthrone, perinone, perylene, thioindigo, chlorinated isobiolanthrone, indanthrone, oxazine, alizarin), etc. Dyes, trisazo dyes, anthraquinone dyes, triphenylmethane dyes, polymethine dyes, indigoid dyes, quinophthalone dyes, azochrome complex dyes, stilbene dyes, pyrazolone dyes, naphthazine dyes, etc. Cyanine dye as a dye,
Azurenium dye, squarium dye, croconium dye, triphenylmethane dye, oxazine dye, azine dye, trisazotriphenylamine dye, naphthoquinone dye, naphthalocyanine metal complex dye, indoaniline metal complex dye , Dithiol / metal complex dyes, diiminium compounds and the like.

Preferred light-absorbing compounds include violet, red, green and yellow dyes and organic pigments of organic coloring materials. These light absorbing compounds may be used alone,
A mixture of two or more can be preferably used. It is most effective when an organic pigment and a dithiol / metal complex compound represented by the following general formula are used in combination.

[0019]

Embedded image

(Wherein X represents a hydrogen, chlorine, bromine atom or methyl group, dimethyleneamine group or methoxy group, M represents a nickel, cobalt, copper, palladium or platinum atom;
(at represents a quaternary ammonium) The dithiol / metal complex dye has an extremely low light absorption in the visible light region, and has an extremely large absorbance at the maximum absorption wavelength in the near infrared region, absorbing the ultraviolet region. High luminous ray transmittance as front panel for equipment. Further, the dithiol / metal complex compound is a compound having good thermal stability, having no hygroscopic property, and being extremely stable even when brought into contact with water, and can be easily incorporated into a transparent resin. Such dithiol / metal complex dyes are described in Harry B. Gray et al. In Journal of the American Chemical Society (JACS, Vol. 88, 48).
70-4875, 1966), by reacting dithiols with nickel chloride, and then reacting the reaction solution with a quaternary ammonium halide. As the quaternary ammonium group, a tetra-n-butylammonium group, a tetra-n-propylammonium group, a trioctylmethylammonium group, or the like is used. In the above general formula, X is a methoxy group-substituted dithiol / nickel complex compound, the maximum absorption wavelength is 827 nm or 950 nm, and the dimethylamine group-substituted dithiol / nickel complex dye is
It has a maximum absorption wavelength of 1040 nm, which is preferable for a molded panel for a screen of a plasma display.

The absorbance of the compound used in the present invention is:
This is a value defined by A in the following equation (1), and FIG. 2 shows the measurement principle. Assuming that the light amount of the light beam 51 emitted from the light source 5 and incident on the sample 6 is I ₀ , the light beam 61 emitted from the sample is reduced to the light amount I. This light quantity change rate I / I
_The value A obtained by calculating _{0 according} to the equation (1) is the absorbance. If a general spectrometer equipped with a device that disperses the wavelength of the light beam emitted from the light source is used, the absorbance at each wavelength can be obtained.

[0022]

(Equation 1)

The method of measuring the absorbance differs depending on the form and wavelength range of the sample to be measured. However, when measuring the absorbance of a powdery sample, it is necessary to detect the light component that diffuses and transmits through the sample. For example, an optical measurement system shown in JIS-Z8722 can be used. The method for producing the resin composition according to the present invention is not particularly limited as long as the light-absorbing compound is uniformly dispersed in the transparent resin, and is, for example, a polymerizable monomer or a partially polymerized polymerizable monomer. There are a method of dispersing the light absorbing compound in a body syrup and polymerizing it, a method of mixing the light absorbing compound with a previously polymerized transparent resin, melt-kneading and extruding and granulating. As the polymerization method, known methods such as bulk polymerization, suspension polymerization, and solution polymerization can be used.

The resin composition of the present invention contains other components such as a reinforcing agent, a filler, a release agent, a heat stabilizer, an antioxidant, and a nucleus as long as the optical properties and the mechanical and thermal properties are not impaired. Agents, light stabilizers, ultraviolet absorbers, plasticizers and the like can be included in any process. In the present invention, the measurement of the total light transmittance is performed using a commercially available measuring instrument according to the JIS K-7105 method. The measurement of the spectral light transmittance can be performed using a commercially available spectrometer.

In the present invention, the total light transmittance is 50 to 9
0%, and the spectral light transmittance in the visible light wavelength range of 430 to 650 nm is 50 to 85%, and 430 to 480 nm.
At 60-85%, 50-70% at 530-580 nm,
It is in the range of 50-85% at 590-640 nm. It is preferable that the total light transmittance is 50% to 90% because the original luminance of the video device is not greatly reduced. 65%
The above total light transmittance is most preferable. By adopting the above-mentioned selected wavelength absorption characteristics, it is possible to easily balance the color of a color image and to improve the external light contrast by absorbing external light rays. That is, the light intensity of the fluorescent luminous body is different depending on the type and model of the color image device, and it is necessary to arbitrarily control the light transmittance of the three primary colors of the color image, red, green, and blue wavelength bands. In the red, green and blue wavelength bands of the three primary colors, when enhancing the light intensity of blue light, the transmittance of green light with high light intensity is suppressed without lowering the light transmittance, and the absorbance difference between blue and green is reduced. What is 0.02 to 0.20 is desired. Preferably, it has an absorbance difference of 0.05 to 0.15.

If the transmittance in the green wavelength band is simply reduced, the panel color becomes more reddish, and the sense of unity with the housing of the video equipment is impaired. In this case, it is preferable to absorb a long wavelength region of 650 nm or more. Therefore, the wavelength absorption spectrum is not flat but has a peak in the wavelength absorption characteristics between the three colors due to the purpose of improving the transmitted light intensity ratio and the color purity of the three-color CRT used in the projection television receiver. Is preferred.

In the plasma display, in addition to the above, in the near infrared region having a wavelength of 750 to 1100 nm, 800 nm and / or 900 nm and / or 10 nm.
The spectral light transmittance in the near-infrared wavelength region of 00 nm is at least 30% or less, and the device absorbs near-infrared rays emitted from an image device and can prevent malfunction due to electromagnetic wave radiation to peripheral devices. Preferably, the spectral light transmittance in the near infrared wavelength region of 800 nm or / and / or 900 nm and / or 1100 nm is 20% or less. More preferably, the spectral light transmittance is 10% or less.

For example, the near-infrared ray emitted from the image equipment of the plasma display has a transmittance of 5% or less in the near-infrared region most in order to prevent malfunctions to an infrared communication device such as a television, a video, a cooler remote control and a personal computer. preferable. The selective wavelength-absorbing sheet used in the present invention is a single-layer structure composed of one kind of resin composition or a resin composition composed of two or more kinds of resin compositions as long as the resin composition is composed of a transparent resin and a light-absorbing compound. Any of the multilayer structures may be used. In order to obtain a sheet having a multilayer structure, it is achieved by a co-extrusion molding method in which two or more resin compositions are simultaneously melt-extruded. It is desirable to use a multilayer structure composed of a resin layer containing only a coloring material, because the mixing of the coloring material is suppressed and the vividness of the color tone is emphasized.

The sheet shape and its forming method are not particularly limited. For example, a smooth, corrugated or prismatic sheet can be obtained by using an extruded sheet forming method using a T-die. In making the panel molded body of the present invention,
After the sheet is subjected to vacuum forming, pressure forming, stamping, and secondary processing, a layer of an antireflection film made of a low-refractive-index transparent fluororesin is applied, or the sheet is laminated or an antireflection film is applied to the sheet. The composite sheet laminated by applying a layer of a laminate or an antireflection film or the like is subjected to secondary processing to obtain a panel molded body. Preferably,
A composite sheet in which the above-mentioned sheet is laminated with an antireflection film by lamination is subjected to secondary processing to obtain a molded panel.

The antireflection film of the present invention made of a transparent fluororesin having a low refractive index is coated with a transparent fluororesin having a refractive index of 1.28 to 1.44 in a thin film thickness of 0.05 to 0.25 μm. It is preferable that the total light reflectance is less than 7%. When a low-refractive-index antireflection film is used as the antireflection film, the antireflection film is made of a transparent resin film having a small amount of light loss due to light scattering or diffusion, and has a refractive index of 1.28 to one side. An antireflection film made of 1.44 transparent fluororesin is
It is preferably composed of a minimum of three 30 μm adhesive layers and has a total light reflectance of less than 7%. In order to use a thin film made of a transparent fluororesin as an antireflection film, the refractive index must be lower than the refractive indexes of the transparent resin and the transparent resin film substrate.

Conventionally, when an antireflection film having a lower refractive index than the film base material is formed on the outermost layer with a thickness of 1/4 of the wavelength of visible light, the upper surface reflected light and the lower surface reflected light cancel each other out, so that the surface has an interference effect. It is known that reflection is reduced. The refractive index is 1.2 in a range that can be easily obtained industrially.
A fluororesin of 8 to 1.44 is suitable. Examples of the low-refractive-index transparent resin having such a fluorine-containing resin as an antireflection film include, for example, a fluorinated alkyl ester polymer of acrylic acid and a fluorinated alkyl ester polymer of methacrylic acid,
The brand name "CYTOP" (manufactured by Asahi Glass Co., Ltd.) and the brand name "Teflon AF" (manufactured by Dupont) are known. Examples of the anti-reflection transparent resin film include “Arctop” (trade name, manufactured by Asahi Glass Co., Ltd.) and “Realak,” a product name obtained by polymerizing and curing fluorine-containing di (meth) acrylate and fumarate diester as constituent units. (Manufactured by NOF CORPORATION), etc., and have high anti-reflection performance for external light.

The thickness of the thin film layer using the fluorine-containing resin as the anti-reflection film is in the range of 0.05 to 0.25 μm. In order to reduce the reflection in the visible light wavelength region when observing the image screen, it is more preferable that the total light reflectance is less than 5% at a thickness of 0.1 to 0.2 μm. Further, the transparent resin film base material is advantageous in that the refractive index is large, and generally available polyethylene terephthalate (refractive index: 1.65), polycarbonate (refractive index: 1.58), polymethyl methacrylate ( Refractive index: 1.49), triacetyl cellulose (refractive index: 1.52) and the like are preferably mentioned as suitable examples. And the thickness of the transparent resin film substrate is 25
~ 200 µm is preferred. If the thickness is less than 25 μm, the strength is insufficient, and if it exceeds 200 μm, there is a problem that the rigidity of the film is high and bubbles are likely to be mixed during lamination and integration with the selected wavelength absorbing resin sheet. In addition, the adhesive layer
30 μm is preferred. If the thickness of the adhesive layer is less than 5 μm,
It is difficult to form the pressure-sensitive adhesive uniformly. If the thickness exceeds 30 μm, for example, defects such as wrinkles are generated in the transparent resin film during lamination and integration with the selected wavelength absorbing resin sheet at a high temperature in summer, which is not preferable.

The pressure-sensitive adhesive used is an acrylic resin using polybutyl acrylate or 2-ethylhexyl polyacrylate having a glass transition temperature of the main component resin in the range of -50 ° C to -130 ° C, or polyisobutylene. A system, a silicone rubber system or an ethylene vinyl acetate system having a vinyl acetate content of 20 to 40% is preferred. FIG. 3 shows a typical configuration example of the antireflection transparent resin film. (A) Polyethylene resin protective film (b) Fluorine resin antireflection layer (c) Transparent resin film substrate (d) Adhesive layer (e) Polyethylene resin protective film. It is more preferable that an antistatic layer is provided between (c) the transparent resin film substrate and (b) the fluororesin antireflection layer. As the antistatic agent, a metal compound such as tin oxide, a surfactant or the like is coated, and a surface resistance value of 10 ¹⁰ Ω or less is suitably used.

A resin composite sheet can be obtained by laminating and integrating the transparent resin film with anti-reflection of external light onto the selective wavelength absorbing sheet via a pressure-sensitive adhesive roll or the like with a press or pressure roll. In the lamination and integration step, it is necessary to clean the raw materials and the like and to clean the atmosphere of the lamination work in order to prevent dust and foreign substances brought in from the raw materials and the like from being mixed in between the lamination interfaces.

As a further advantageous method, when the selective wavelength absorbing resin composition is extruded and formed into a sheet using a T-die, the above-mentioned anti-reflection transparent resin film is taken off with a pressure-sensitive adhesive via an adhesive. It is convenient to supply them continuously and to laminate them together to form a composite sheet. According to this method, continuous production is easy, the process is simple, and mass production is excellent.

At this time, when the transparent resin film having high antireflection performance is continuously laminated and laminated on the extruded sheet of the selective wavelength absorbing resin composition, the temperature of the selective wavelength absorbing sheet before lamination is 30 to 100 ° C. The tension of the anti-reflection film is 1 to 10 kg / m (per roll length), and the roll pressure is 0.5 to 4 ton / m. It is preferred.

The temperature of the selected wavelength absorbing sheet before lamination is 3
At 0 ° C. or lower, although affected by the type of the surface-coating agent, uneven lamination is likely to occur, and the antireflection film tends to peel off, which causes a problem. On the other hand, if the temperature of the selected wavelength-absorbing sheet before lamination is 100 ° C. or higher, the temperature is too high, which is not preferable because the polyethylene-based protective film is disadvantageous.
When the sheet temperature at the time of lamination is in the range of 40 to 90 ° C., the lamination adhesive strength is high and most preferable.

The tension of the antireflection film is 1 kg /
If it is less than m, the peeling of the polyethylene resin protective film is not performed smoothly, and the tension becomes uneven, which is not preferable. Furthermore, a tension roll is used as an expander roll,
By using a spiral roll type roll, it is possible to prevent film wrinkles during lamination and lamination, which is convenient. On the other hand, if it exceeds 10 kg / m, the tensile stress of the transparent resin film remains, causing warpage of the composite panel molded product. If the roll pressure is less than 0.5 ton / m, air is easily entrained, and if the roll pressure is more than 4 ton / m, optical distortion occurs, which is not preferable.

The selected wavelength-absorbing resin composite sheet manufactured as described above is formed into an arbitrary shape to obtain a selected-wavelength-absorbing resin composite panel molded body. The selected wavelength-absorbing resin composite panel molded body is suitably used as a panel molded body for a projection type television screen and a panel molded body for a plasma display screen installed on the front surface of an image display unit. It is also useful as an art case for paintings or the like for picture frames in which reflection of external light is a problem, as well as in the field of video equipment.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to examples and comparative examples. The evaluation and test methods used in each of the examples and comparative examples are as follows. (1) Absorbance measurement: The powder sample was treated with two pieces of quartz glass
mm with an interval of mm, and using a self-recording spectrophotometer UV-3100PC manufactured by Shimadzu Corporation for 400 to
The light absorption spectrum is measured in the range of 1100 nm.
In the obtained spectrum, the absorbance in the wavelength band showing the maximum peak is determined according to the formula 1. (2) Total light transmittance: measured using a 1001-DP type haze meter manufactured by Nippon Denshoku Industries Co., Ltd. according to JIS K-7105. (3) Spectral light transmittance: A resin test piece was placed on a Shimadzu Corporation UV-3100PC self-recording spectrophotometer.
The transmission spectrum is measured in the wavelength range of 100 nm, and the spectral light transmittance at an arbitrary wavelength is read. (4) Evaluation of Image Contrast: A smooth sheet-shaped resin molded product was converted to a commercially available plasma display panel (Plasmavision M21 PDS-212 manufactured by Fujitsu General Limited).
3) or a commercially available projection television (TH-43GF, manufactured by Matsushita Electric Industrial Co., Ltd.), and the contrast of the image was visually determined. ◎ indicates good condition, △ indicates no effect, and × indicates that it cannot be used. (5) Evaluation of a sense of unity between the image display unit and the housing unit: After the evaluation of the image contrast is completed, the image power is turned off.
The unity of the color tone between the image display panel molding surface and the housing was visually determined. ◎ indicates good condition, △ indicates no effect, and × indicates that it cannot be used. (6) Measurement of Spectral Reflectance: Using a self-recording spectrophotometer (model 330, manufactured by Hitachi), the spectral reflectance at 5 ° was measured, and the reflectance at 550 nm was defined as the external light reflectance.

[0041]

Example 1 Methacrylic resin (trade name: Del Powder 70)
H, manufactured by Asahi Kasei Kogyo Co., Ltd.) and a light-absorbing compound having an absorbance of 0.03 or more as measured by the above method (1) at a concentration shown in Table 1, blended with a Henschel mixer, and then extruded with a vented extruder 40 mmφ. Pellets are formed at a resin temperature of 250 ° C. to obtain a resin composition. The obtained pellets are formed into an extruded sheet using a unit consisting of an extruder (screw diameter 50 mmφ, L / D = 32, single axis), a multi-manifold die, and three polishing rolls. create. When making a laminated sheet, the second extruder (screw diameter 25 m
mφ, L / D = 32, single axis) are combined to form a co-extruded sheet, and similarly, a laminated sheet having a width of 300 mm can be obtained. The thickness of the sheet is adjusted to a target of 2.0 mm by the clearance of the polishing roll. The thickness of the laminated portion of the laminated sheet is adjusted by the discharge amount balance of the two extruders. The obtained selective wavelength absorbing sheet is dipped in a low-refractive-index transparent fluorine-based resin solution “CYTOP” manufactured by Asahi Glass Co., Ltd.
A thin film having a thickness of 1 μm was formed and laminated to obtain a selected wavelength-absorbing resin composite panel molded product. The evaluation of the above (2) to (6) is performed using this panel molded body as a test piece. The results are shown in Table 2 and FIG. When installed on the front surface of a projection television, it is preferable because it has excellent selective wavelength absorption and external light reflectivity, because it improves the contrast of an image and gives a sense of unity with the housing.

[0042]

Example 2 One type of light absorbing compound having an absorbance of 0.03 or more was used at the compounding concentration shown in Table 1 to prepare an acrylic resin colored product. Using two extruders, one of the raw material resins is a transparent smoke-colored acrylic resin (anthraquinone-based organic dye; Plastread 8350, Sumiplast Yellow H
LR and Sumiplast Green G), and a coextruded two-layer sheet was prepared using the above-mentioned acrylic resin colored product in the other extruder. The laminated thickness of the sheet is 2 mm for the smoke color and 0.2 mm for the layer colored with the light absorbing compound. When co-extrusion molding the selective wavelength absorbing sheet, an anti-reflective transparent resin film made of polyethylene terephthalate as a transparent resin film substrate and a fluororesin as an anti-reflective film provided with an adhesive layer on one side is a product made by NOF Corporation. Name: Realok "rolls are prepared on the upper and lower surfaces of the extruded sheet, and each adhesive layer is placed on the extruded sheet surface, and a 2 kg / m tension is continuously applied via a feeding roll and a tension roll. When the surface temperature of the sheet was 70 to 75 ° C., the sheet was laminated by a pressure roll to obtain a resin composite panel molded body. This panel molded body was used as a test piece in the above (2) to
The evaluation of (6) is performed. The results are shown in Table 2 and FIG. It is excellent in the selected wavelength absorption and the external light reflectivity and is preferable.

[0043]

Example 3 A dithiol / nickel complex dye SIR-159 (trade name, manufactured by Mitsui Toatsu Chemicals, Inc.) was used as a light absorbing compound having an absorbance of 0.02 or more. Under the same conditions as in Example 1, a selected wavelength-absorbing sheet of a single-layer sheet having a width of 300 mm is formed. When extruding the selected wavelength-absorbing sheet under the same conditions as in Example 2, on both surfaces of the selected wavelength-absorbing sheet, triacetyl cellulose is used as a transparent resin film base material, and an anti-reflection film "Japan" A resin composite panel molded body was obtained by adhering and laminating a product name of Real Oil manufactured by Yushi Co., Ltd. on both sides. This panel molded body was used as a test piece in the above (2) to
The evaluation of (6) is performed. Table 2 shows the results. It is excellent in the selected wavelength absorption and the external light reflectivity and is preferable. Also, 8
Spectral light transmittance in the near infrared region of 20 nm is also 10%.
The following is shown. In addition, when installed on the front surface of the plasma display, improvement in image contrast and a sense of unity with the housing are recognized, which is preferable.

[0044]

Example 4 Four light absorbing compounds each having an absorbance of 0.03 or more and a dithiol-nickel complex compound (methoxy-substituted dithiol-nickel complex dye, SIR-159, manufactured by Mitsui Toatsu Chemicals, Inc.) , And SIR-13
0) were combined with each other at the concentrations shown in Table 1, and under the same conditions as in Example 3, antireflection films were attached to both sides of the selected wavelength absorbing sheet to obtain a resin composite panel molded product. The evaluation of the above (2) to (6) is performed using this panel molded body as a test piece. Table 2 shows the results. It is preferable because it is excellent in selective wavelength absorption and external light reflectivity, and when installed on the front surface of the plasma display, it is preferable because it improves the contrast of an image and gives a sense of unity with the housing.

[0045]

Comparative Example 1 A resin composite panel molded body was obtained by extruding a transparent acrylic resin plate and laminating an antireflection film on both sides of the sheet under the same conditions as in Example 3 under the same conditions as in Example 3. This panel molded body was used as a test piece in the above (2) to
The evaluation of (6) is performed. The total light transmittance of the test piece exceeds 90% and the spectral light transmittance of 430 to 650 nm is 90%.
%. When it is installed on the front of the projection television, no improvement in the contrast of the image is observed, and it is not preferable because it has a high external light reflectance.

As a reference example, the spectral reflection when the antireflection film was not laminated was measured, and the reflectance of the transparent acrylic resin sheet was determined. The results are shown in Table 2 and FIG.

[0047]

[Table 1]

[0048]

[Table 2]

[0049]

As described above, the molded article of the selective wavelength absorbing resin composite panel obtained by the present invention has a small amount of light loss due to scattering and diffusion of light and effectively transmits light in the visible wavelength range of 450 to 650 nm, and reflects external light. It has a high rate of reflection, has little effect on the reflection of fluorescent lights, etc., has a high image contrast, and has a sense of unity between the housing and the image display when the device is turned off. It is extremely useful as a material to be installed on the front surface of a.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing the configuration of a selective wavelength absorbing resin composite panel molded product obtained by the present invention and two types of plasma displays.

FIG. 2 is an explanatory diagram schematically showing the measurement principle of the absorbance of a compound used in the present invention.

FIG. 3 is an explanatory view showing an example of a surface antireflection transparent resin film used in the present invention.

FIG. 4 is a graph showing light transmittance.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plasma 11 Ultraviolet light 12 Visible light 2 Glass substrate 21 Display electrode 22 Address electrode 23 Cathode electrode 24 Anode electrode 25 Partition wall 31 Dielectric 32 Protective layer 33 Resistance 34 Insulator 4 Fluorescent substance 5 Selection wavelength absorption resin composite panel molded object 6 Light source 61 Light incident on the sample 7 Sample to be measured 71 Light emitted from the sample (a) Polyethylene resin protective film (b) Fluorine resin antireflection layer (c) Transparent resin film substrate (d) Adhesive layer (e) Polyethylene resin Protective film

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29K 33:04 105: 32 B29L 9:00

Claims (7)

[Claims] 1. A resin composition comprising a transparent resin and at least one or more light-absorbing compounds having an absorbance of at least 0.01 in a wavelength range of 400 to 1100 nm, and a total light transmittance of 50 to 90%. And the spectral light transmittance in the visible light wavelength range of 430 to 650 nm is 430 to 48.
60-85% at 0 nm, 50-7 at 530-580 nm
0%, 490 to 640 nm, and 50 to 85% in the range of 50 to 85%. A selective anti-reflection coating made of a low-refractive-index transparent fluororesin is laminated on one or both surfaces of the molded article of the selected wavelength absorbing sheet. Wavelength absorbing resin composite panel molded product. 2. A resin composition comprising a transparent resin and at least one or more light-absorbing compounds having an absorbance of at least 0.01 in a wavelength range of 400 to 1100 nm, and having a total light transmittance of 50 to 90%; And the spectral light transmittance in the visible light wavelength range of 430 to 650 nm is 430 to 480.
60-85% at nm, 50-70 at 530-580 nm
%, 590 to 640 nm, 50 to 85%, and 800 nm or / and 900 nm or // in the near infrared wavelength region.
And a selective wavelength absorbing resin characterized in that an antireflection film made of a transparent fluororesin having a low refractive index is laminated on one or both sides of a selective wavelength absorbing sheet molded product having a spectral light transmittance of 1100 nm or less of 30% or less. Composite panel molding. 3. The molded article according to claim 1, wherein the transparent resin is a methacrylic resin. 4. An anti-reflection film comprising a transparent film having a thickness of 25 to 200 μm as a base material, and 0.05 to 0.2
5. An antireflection coating film comprising a transparent fluororesin having a thickness of 5 .mu.m and a refractive index of 1.28 to 1.44, and at least three layers of an adhesive layer having a thickness of 5 to 30 .mu.m on one side. 4. The selected wavelength-absorbing resin composite panel molded product according to any one of 1 to 3 above. 5. A resin composition comprising a transparent resin and at least one or more light absorbing compounds having an absorbance of at least 0.01 in a wavelength range of 400 to 1100 nm, and having a total light transmittance of 50 to 90%. And the spectral light transmittance in the visible light wavelength range of 430 to 650 nm is 430 to 48.
60-85% at 0 nm, 50-7 at 530-580 nm
0%, 50 to 85% at 590 to 640 nm in the range of 50 to 85%. An antireflection film made of a transparent fluororesin having a low refractive index is laminated on one or both sides of the selective wavelength absorption sheet. Resin composite sheet. 6. A resin composition comprising a transparent resin and at least one or more light-absorbing compounds having an absorbance of at least 0.01 in a wavelength range of 400 to 1100 nm, and having a total light transmittance of 50 to 90%. And the spectral light transmittance in the visible light wavelength range of 430 to 650 nm is 430 to 480.
60-85% at nm, 50-70 at 530-580 nm
%, 590 to 640 nm, 50 to 85%, and 800 nm or / and 900 nm or // in the near infrared wavelength region.
And a selective wavelength-absorbing resin composite sheet characterized in that an antireflection film made of a transparent fluororesin having a low refractive index is laminated on one or both sides of a selective wavelength-absorbing sheet having a spectral light transmittance of 1100 nm or less of 30% or less. . 7. Extrusion of the selected wavelength absorbing sheet into an extruded sheet and subsequent lamination of the antireflection film by lamination, the temperature of the selected wavelength absorbing sheet before lamination is 30 to 100 ° C., and the antireflection film is laminated. 8. The laminate according to claim 6, wherein said tension is laminated under pressure under a tension of 1 to 10 kg / m (per roll length).
A method for producing the selective wavelength absorbing resin composite sheet according to the above.