JP2006031030A - Synthetic resin molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin molded article suitable for a light transmission filter capable of obtaining a clear color feeling while suppressing glare while maintaining the brightness of the visual field.
SOLUTION: It contains an ultraviolet absorber and a blue light absorber together with an organic dye having a maximum absorption value in the vicinity of the center wavelength of a standard relative luminous sensitivity curve, and has a minimum value of a transmittance curve in a wavelength range of 550 to 585 nm. A synthetic resin molded article having a transmittance of 25% or less at the minimum value, an average transmittance of 15% or more in the wavelength range of 590 to 660 nm, and an average transmittance of 10% or more in the wavelength range of 470 to 550 nm. .
[Selection figure] None

Description

  The present invention relates to a synthetic resin molded article suitable for a light-transmitting filter capable of reducing the glare of light while maintaining the brightness of the visual field and obtaining a clear color feeling.

  As is known, ultraviolet rays and other light rays that may affect the eyes are generated from CRT screens of personal computers, word processors, and the like. As a countermeasure, a filter is used in front of the screen. As this filter, there is usually one having a function of preventing reflected light from the screen. In addition, some have a function of shielding ultraviolet rays and others have reduced light transmittance in order to suppress glare on the screen, but this function is a general sunglasses used to adjust the transmission of sunlight. Common function. In general sunglasses, in order to suppress glare, it is made for the purpose of suppressing the transmittance near the center wavelength of the standard relative luminous sensitivity curve (FIG. 2). However, in general sunglasses, the transmittance of other wavelength portions is also suppressed as shown in FIG. For this reason, when sunglasses are used in an environment with a small amount of light such as twilight, the field of view is generally darkened, which may hinder the visual recognition of objects in the outside world. That is, as a result of trying to suppress glare, the total amount of transmitted light may be excessively reduced, and the object may not be sufficiently visible.

  Sunglasses containing neodymium or didymium in the glass absorb neodymium or didymium in the vicinity of the center wavelength of the standard relative luminous sensitivity curve while maintaining general brightness. Sunglasses are known. However, from the viewpoint of ease of handling, the material is preferably a synthetic resin such as plastic, particularly polycarbonate having high impact resistance, rather than glass. However, none of the plastics, particularly polycarbonate, satisfies this demand. Japanese Patent Publication No. 53-39910 discloses a spectacle lens that absorbs a wide range of light having a good visibility of 550 to 600 nm. However, this spectacle lens uses diethylene glycol bisallyl carbonate (CR-39) as a material. It is difficult to dye when polycarbonate is used. Further, the spectacle lens has a light transmittance that gradually decreases in the vicinity of 550 to 650 nm (yellow to orange). When the transmittance of yellow light is lowered for the purpose of enhancing the antiglare effect, There is also a possibility that the transmittance of the ink may be lowered and the color balance may be deteriorated.

  The same can be said for the filter for CRT, and the CRT filter is manufactured with the same configuration as the lens for glasses as described above, in which the transmittance gradually decreases in the yellow to orange range, When this is used, when the CRT screen is a variety of color video screens as in today's video game, the total amount of transmitted light is too small to make it difficult to distinguish colors, and the target screen cannot be fully viewed. There is a case.

  An object of the present invention is to provide a synthetic resin molded article suitable for a light-transmitting filter that can suppress the glare while maintaining the brightness of the visual field while obtaining a clear color feeling.

  The present inventors have found that the above-mentioned problems can be solved by suppressing the light transmittance and the like in a certain wavelength region of light, and have completed the present invention.

  The present invention contains a UV absorber and a blue light absorber together with an organic dye having a maximum absorption value in the vicinity of the center wavelength of the standard relative luminous sensitivity curve, and has a minimum value of the transmittance curve in a wavelength range of 550 to 585 nm. A synthetic resin molded article having a transmittance of 25% or less at the minimum value, an average transmittance of 15% or more in the wavelength range of 590 to 660 nm, and an average transmittance of 10% or more in the wavelength range of 470 to 550 nm. I will provide a. The synthetic resin molded body may contain an infrared absorbing or reflecting agent.

  The present invention is further used as a part of an electronic display device such as a device for displaying a color image, for example, a CRT display device, or as a part of an equipment for observing a color image, or used in combination with the device or the equipment. There is also provided a synthetic resin molded article having the above-described structure for a light transmission filter.

  The synthetic resin molded article of the present invention can block ultraviolet rays, blue light, and infrared rays that are harmful to the eyes, and is also capable of blocking visible light as a light transmission filter for devices such as CRTs and liquid crystal displays that display color images. It can withstand a wide range of applications, such as reducing color, improving color balance and color contrast, making the contours clear, and reducing the yellow light that is irritating to the eyes and reducing fatigue. is there. For example, in addition to the above, the scenery can be clearly seen even when used on an awning sheet or window glass for transportation, and it becomes easy to identify blue, yellow, and red of traffic lights and brake lamps of automobiles.

（式中、ｍおよびｎは、同一または異なって１〜４の整数を表す）で表されるスクアリリウム化合物［以下、式（Ｉ）で表される化合物を化合物（Ｉ）という。他の式番号の化合物についても同様である］が好適である。 In this specification, the center wavelength of the standard relative luminous efficiency curve indicates approximately 555 nm, and the vicinity of the central wavelength of the standard relative luminous sensitivity curve indicates a wavelength region of approximately 530 to 585 nm. Moreover, as an organic pigment | dye which has the maximum absorption value near the center wavelength of a standard specific luminous efficiency curve, Formula (I):

(Wherein m and n are the same or different and each represents an integer of 1 to 4) represented by a squarylium compound [hereinafter, a compound represented by formula (I) is referred to as compound (I). The same applies to the compounds of other formula numbers].

  Since neodymium and didymium, which have been used in conventional glasses as light-absorbing dyes, are inorganic materials, they can be contained in the form of metal ions in glass lenses made by melting at high temperatures. When kneaded into the resin, it could not be sufficiently dispersed because it did not melt into the resin, and could not be used as a synthetic resin. In this invention, the said squarylium compound melt | dissolved in the synthetic resin, and it came to be able to suppress the glare of a light beam by using this as a light absorber. For the purpose of suppressing glare, ideally, a film having a maximum absorption value at 555 nm is preferable, but this is not necessarily so. If the absorption peak is in the vicinity of 555 nm, the absorption peak has a width. It absorbs the vicinity of the center wavelength of the specific visibility curve fairly well and can suppress glare without problems in practice.

  The above squarylium compounds are known per se, for example, the methods described in Angew. Chem. Internat. Edit., 7, 530-535 (1968), Liebigs Ann. Chem., 712, 123 (1968), or the like Can be manufactured.

  As the ultraviolet absorber, JF-86 manufactured by Johoku Chemical Co., Ltd., Seasorb 705 manufactured by Sibro Kasei Co., Ltd., and the like can be used.

  As the blue light absorber, Kayaset Yellow AG manufactured by Nippon Kayaku Co., Ltd., PS Orange GG manufactured by Mitsui Toatsu Dye Co., Ltd., or the like can be used.

  As the infrared absorbing or reflecting agent, IR750 manufactured by Nippon Kayaku Co., Ltd., IR Additive 200 manufactured by Dainippon Ink & Chemicals, Inc. can be used.

  As a synthetic resin raw material used as a base material of a synthetic resin molded article, polycarbonate is most suitable because of its excellent impact resistance. In addition, polymethyl methacrylate (PMMA), CR-39 (US PPG Industries) or cellulose Fibrous plastics such as acetate and cellulose propionate can also be used.

An example of a device that displays a color image is an electronic display device. The electronic display device according to the present invention includes a cathode ray tube (CRT), a fluorescent display tube (VFD), an electroluminescent panel (ELP), a light emitting diode (LED), Plasma display panels (PDPs), heat-emitting bulbs (ICLs), light-emitting electronic display devices such as laser displays, liquid crystal displays (LCDs), electrochromic displays (ECDs), etc. Non-light-emitting electronic display devices. As a display method of such an electronic display device, a direct view type such as a cathode ray tube, a projection type such as a projection type liquid crystal display (a front projection type and a rear projection type), and holography are representative. There is an off-screen shape. When the synthetic resin molding of the present invention is used as a light transmission filter for a color image of the electronic display device, the effect is relatively good. When the color image is a moving image with intense motion such as a game, the effect can be recognized even better. The electronic display device referred to in the present invention includes a traffic signal and a vehicle backlight.
The color image observation facility referred to in the present invention includes an observation deck and a window for viewing a sightseeing bus.

  Having the minimum value of the transmittance curve in the wavelength range of 550 to 585 nm, and setting the transmittance at the minimum value to 25% or less, the light transmittance in the wavelength range that makes the most dazzling of visible light visible. For the purpose of suppressing, it is preferable to set the transmittance at the minimum value to 20% or less, and more preferable to set the transmittance at the minimum value to 15% or less.

  The reason why the average transmittance in the wavelength range of 590 to 660 nm is 15% or more is to maintain the transmittance of orange light, and is preferably 20% or more. Furthermore, it has a maximum value of the transmittance curve in the wavelength range of 590 to 660 nm, and the transmittance at the maximum value is preferably 30% or more, and the transmittance at the maximum value is particularly preferable. 35% or more. This purpose is effectively achieved by including in the synthetic resin raw material an infrared absorption or reflection agent in addition to an organic dye, an ultraviolet absorber and a blue light absorber having a maximum absorption value near the center wavelength of the standard relative luminous efficiency curve. Can be achieved. Thereby, while maintaining the transmittance of orange light at a high level, it is possible to prevent red light from being excessively transmitted and to make the color balance of all transmitted light appropriate.

  The reason why the average transmittance in the wavelength range of 470 to 550 nm is 10% or more is to ensure the color balance of transmitted light and the brightness of the field of view. In particular, the transmittance is preferably 15% or more at any wavelength in the wavelength range of 470 to 550 nm, and particularly preferably 20% or more.

  In addition, it is preferable that the light transmittance in the wavelength range of 400-450 nm becomes substantially 0 with a blue light absorber.

  When the synthetic resin molding is used as a transmitted light filter due to the limitations on the respective transmittances as described above, the reason why the color balance and the color contrast are improved as well as simply reducing glare is considered as follows. It is done.

  First, it not only suppresses glare by absorbing and diminishing the wavelength range of 550 to 585 nm, but also creates a step in the continuity between the response to red and the response to green in the visual system. It becomes easy to identify green. This is the same reason that it is presumed that it is easier to identify colors if there is a little dark area in the boundary, although the border between adjacent colors seen in the rainbow is not clearly visible. It is. On the other hand, blue light is easily scattered in the atmosphere by dust and water vapor, but is also easily scattered in the eyeball, causing a reduction in visibility. In order to reduce this blue light, a blue light absorber was included, so that the transmittance of yellow and blue was balanced, and overall the sharpness was improved. As a result, the red, yellow, green and blue colors were balanced, and the color contrast was enhanced.

  Next, an example of the synthetic resin molding of the present invention will be described.

  Add organic dye, ultraviolet absorber, blue light absorber and infrared absorber or reflector having maximum absorption value near the center wavelength of the standard relative luminous sensitivity curve to the synthetic resin raw material that is the base material of the synthetic resin molding After mixing, a synthetic resin molded body can be obtained by molding by an extrusion molding method or an injection molding method so as to be uniformly contained in the entire synthetic resin molded body. Moreover, it is also possible to coat a part of the absorbent or the like, for example, an infrared reflecting agent on the surface of the synthetic resin molded body by a vacuum deposition method or the like.

  The content of the organic dye is preferably 0.0001 to 0.01% by weight, particularly preferably 0.0005 to 0.005% by weight, based on the synthetic resin raw material that is the base material of the synthetic resin molding. The content of the ultraviolet absorber is preferably from 0.1 to 1.0% by weight, particularly preferably from 0.3 to 0.8% by weight, based on the synthetic resin raw material. The content of the blue light absorber is preferably 0.001 to 0.02% by weight, particularly preferably 0.002 to 0.01% by weight, based on the synthetic resin raw material. The content of the infrared absorbing or reflecting agent is preferably 0.001 to 0.05% by weight, particularly preferably 0.001 to 0.02% by weight, based on the synthetic resin raw material.

  In carrying out the present invention, the synthetic resin molded body can be used in combination with a polarizing element such as a polarizing film, or the synthetic resin molded body integrated with the polarizing element is used in an insert molding method or an adhesive. It can also be used as a synthetic resin molding comprising a polarizing element as an integral part, such as being produced by a laminating method or the like. In the case of the insert molding method, a polarizing element formed by laminating and integrating a plastic sheet on one side or both sides of a polarizing film is inserted into a mold in advance, and injection molding is performed to integrate the polarizing element and the resin. Regarding the reduction in transmittance as a synthetic resin molding by using a polarizing element and a synthetic resin molding in combination, or by integrating with a polarizing element, as a synthetic resin molding by changing the amount of dye to be contained, etc. It adjusts so that it may be in the range of the transmittance and transmittance curve in the present invention.

上記の混合物を２５０〜３００℃に温度調節された射出成形機で外形２５５ｍｍ×３３０ｍｍ、厚さ２ｍｍのシートに成形した。得られたシートの分光透過率を図１に示す。このシートをＣＲＴ画面の前面に画面と平行に吊り下げ、テレビゲームを続けたところ、眩しさを全く感じさせず、長時間のゲームでも疲労感が少なく、一方、青色、緑色、黄色、赤色が識別し易くなり色コントラストが鮮やかであった。 Polycarbonate resin [Mitsubishi Engineering Plastics Co., Ltd. H-3000FN] 15kg
Ultraviolet absorber [JF-86, Johoku Chemical Co., Ltd.] 60g
Blue light absorber [Nippon Kayaku Co., Ltd. Kayaset Yellow AG] 1.05 g
Infrared absorber [Dai Nippon Ink Chemical Co., Ltd. IR Additive 200] 1.84 g
Compound (1) 0.24 g

The above mixture was molded into a sheet having an outer shape of 255 mm × 330 mm and a thickness of 2 mm using an injection molding machine whose temperature was adjusted to 250 to 300 ° C. The spectral transmittance of the obtained sheet is shown in FIG. When this sheet is suspended in front of the CRT screen in parallel with the screen and the video game is continued, there is no feeling of glare at all, and there is little fatigue even in a long game, while blue, green, yellow, red It became easy to identify and the color contrast was vivid.

Polycarbonate resin [Mitsubishi Engineering Plastics Co., Ltd. H-3000FN] 60kg
Ultraviolet absorber [JF-86 manufactured by Johoku Chemical Co., Ltd.] 240 g
Blue light absorber [PS Orange GG manufactured by Mitsui Toatsu Dye Co., Ltd.] 2g
Infrared absorber [Nippon Kayaku Co., Ltd. IR750] 1.04g
Compound (1) 0.6 g
The above mixture was formed into a continuous sheet having a thickness of 2 mm by an extruder whose temperature was adjusted to 250 to 300 ° C., and cut to obtain a sheet having an external shape of 550 × 700 mm. The spectral transmittance of the obtained sheet is shown in FIG. When this sheet was placed in front of the screen of a commercial game machine in parallel with the screen and the game was continued with the game software, no glare was felt even on a screen with intense glare, and there was less fatigue in a long game. , Blue, green, yellow, and red became easy to distinguish and the color contrast became vivid.

上記の混合物を２５０〜３００℃に温度調節された射出成形機で外形２５５ｍｍ×３３０ｍｍ、厚さ２ｍｍのシートに成形した。得られたシートの分光透過率を図５に示す。このシートをＣＲＴ画面の前面に画面と平行に吊り下げ、テレビゲームを続けたところ、眩しさを全く感じさせず、長時間のゲームでも疲労感が少なく、一方、青色、緑色、黄色、赤色が識別し易くなり色コントラストが鮮やかであった。 Polycarbonate resin [Mitsubishi Engineering Plastics Co., Ltd. H-3000FN] 15kg
Ultraviolet absorber [JF-86, Johoku Chemical Co., Ltd.] 60g
Blue light absorber [Nippon Kayaku Co., Ltd. Kayaset Yellow AG] 0.75g
Infrared absorber [Nippon Kayaku Co., Ltd. IR750] 0.96g
Compound (2) 0.15 g

The above mixture was molded into a sheet having an outer shape of 255 mm × 330 mm and a thickness of 2 mm using an injection molding machine whose temperature was adjusted to 250 to 300 ° C. The spectral transmittance of the obtained sheet is shown in FIG. When this sheet is suspended in front of the CRT screen in parallel with the screen and the video game is continued, there is no feeling of glare at all, and there is little fatigue even in a long game, while blue, green, yellow, red It became easy to identify and the color contrast was vivid.

A polarizing element is prepared in advance by punching a polarizing sheet in which polycarbonate sheets are laminated on both sides of a polarizing film ["Iupilon Polar" manufactured by Mitsubishi Gas Chemical Co., Ltd., 0.8 mm thickness] in a shape that matches the contour of the synthetic resin molding. Then, this was placed stably on the mold surface.
Polycarbonate resin [Mitsubishi Engineering Plastics Co., Ltd. H-3000FN] 15kg
Ultraviolet absorber [JF-86, Johoku Chemical Co., Ltd.] 60g
Blue light absorber [PS Orange GG, Mitsui Toatsu Dye Co., Ltd.] 0.4g
Infrared absorber [Nippon Kayaku Co., Ltd. IR750] 0.78 g
Compound (1) 0.42 g
The above mixture was injection molded with an injection molding machine whose temperature was adjusted to 250 to 300 ° C. to obtain a sheet having an outer shape of 255 mm × 330 mm and a thickness of 2 mm, in which the polarizing element and the injection resin were integrated. The spectral transmittance of the obtained sheet is shown in FIG. When this sheet was hung in front of the CRT screen in parallel with the screen and the video game was continued, the glare was not felt at all even on a screen with intense glare, and there was little fatigue in a long game, while blue, green , Yellow and red became easy to distinguish and the color contrast became vivid.

Polycarbonate resin [Mitsubishi Engineering Plastics Co., Ltd. H-3000FN] 15kg
Ultraviolet absorber [JF-86, Johoku Chemical Co., Ltd.] 60g
Blue light absorber [Nippon Kayaku Co., Ltd. Kayaset Yellow AG] 0.5g
Compound (1) 0.17 g
The above mixture was molded into a sheet having an outer shape of 255 mm × 330 mm and a thickness of 2 mm using an injection molding machine whose temperature was adjusted to 250 to 300 ° C. The spectral transmittance of the obtained sheet is shown in FIG. When this sheet is suspended in front of the CRT screen in parallel with the screen and the video game is continued, there is no feeling of glare at all, and there is little fatigue even in a long game, while blue, green, yellow, red It became easy to identify and the color contrast became vivid.

A polarizing element is prepared in advance by punching a polarizing sheet in which polycarbonate sheets are laminated on both sides of a polarizing film ["Iupilon Polar" manufactured by Mitsubishi Gas Chemical Co., Ltd., 0.8 mm thickness] in a shape that matches the contour of the synthetic resin molding. Then, this was placed stably on the mold surface.
Polycarbonate resin [Mitsubishi Engineering Plastics Co., Ltd. H-3000FN] 15kg
Ultraviolet absorber [JF-86, Johoku Chemical Co., Ltd.] 60g
Blue light absorber [PS Orange GG, Mitsui Toatsu Dye Co., Ltd.] 0.4g
Compound (1) 0.36 g
The above mixture was injection molded with an injection molding machine whose temperature was adjusted to 250 to 300 ° C. to obtain a sheet having an outer shape of 255 mm × 330 mm and a thickness of 2 mm, in which the polarizing element and the injection resin were integrated. The spectral transmittance of the obtained sheet is shown in FIG. When this sheet is pasted on the window glass and the outside scene is viewed, it does not feel dazzling at all. On the other hand, blue, green, yellow, red are easy to distinguish, the color contrast becomes vivid, and distant mountains The contours of the undulations were clearly visible.

3 is a graph showing the spectral transmittance of the synthetic resin molding obtained in Example 1. FIG. It is a graph which shows a standard specific visibility curve. It is a graph which shows the tendency of the transmittance | permeability of the conventional most common sunglasses. 6 is a graph showing the spectral transmittance of the synthetic resin molded body obtained in Example 2. 6 is a graph showing the spectral transmittance of the synthetic resin molding obtained in Example 3. FIG. 6 is a graph showing the spectral transmittance of the synthetic resin molding obtained in Example 4. FIG. 6 is a graph showing the spectral transmittance of the synthetic resin molded body obtained in Example 5. 6 is a graph showing the spectral transmittance of the synthetic resin molding obtained in Example 6. FIG.

Claims (16)

The transmittance curve has a minimum value in the wavelength range of 550 to 585 nm, the transmittance at the minimum value is 25% or less, the average transmittance in the wavelength range of 590 to 660 nm is 15% or more, and 470 to 550 nm. A light transmission filter having an average transmittance of 10% or more in a wavelength range. 2. The light transmission filter according to claim 1, comprising an organic dye having a maximum absorption value in the vicinity of the center wavelength of the standard relative luminous sensitivity curve, an ultraviolet absorber, and a blue light absorber. It contains infrared absorption or reflection agent, has a maximum value of the transmittance curve in the wavelength range of 590 to 660 nm, the transmittance at the maximum value is 30% or more, and any wavelength in the wavelength range of 470 to 550 nm The light transmission filter according to claim 1, wherein the transmittance is 15% or more. An organic dye having a maximum absorption value in the vicinity of the center wavelength of the standard relative luminous sensitivity curve is represented by the formula (I):

The light transmission filter according to claim 2 or 3, which is a squarylium compound represented by (wherein m and n are the same or different and each represents an integer of 1 to 4). The light transmission filter according to claim 1, comprising a polarizing element as an integral unit. The light transmission according to any one of claims 1 to 5, which is used as a part of a device for displaying a color image, or as a part of a facility for observing a color image, or used in combination with the device or the equipment. filter. The light transmission filter according to claim 6, wherein the device for displaying a color image is an electronic display device. The light transmission filter according to claim 6, wherein the color image observation facility is a view window. 8. The light transmission filter according to claim 7, wherein the electronic display device is a cathode ray tube, a fluorescent display tube, an electroluminescent panel, a light emitting diode, a plasma panel, a heating bulb, a laser display, a liquid crystal display or an electrochromic display. It contains an organic dye having a maximum absorption value in the vicinity of the center wavelength of the standard relative luminous sensitivity curve, has a minimum value of the transmittance curve in the wavelength range of 550 to 585 nm, and the transmittance at the minimum value is 25% or less, The average transmittance in the wavelength range of 590 to 660 nm is 15% or more, and the average transmittance in the wavelength range of 470 to 550 nm is 10% or more. Here, the maximum absorption value near the center wavelength of the standard relative luminous sensitivity curve An organic dye having the formula (I):

(Wherein, m and n are the same or different and represent an integer of 1 to 4). It contains infrared absorption or reflection agent, has a maximum value of the transmittance curve in the wavelength range of 590 to 660 nm, the transmittance at the maximum value is 30% or more, and any wavelength in the wavelength range of 470 to 550 nm The light transmission filter according to claim 10, wherein the transmittance is 15% or more. The light transmission filter according to claim 10 or 11, comprising a polarizing element as an integral unit. The light transmission according to any one of claims 10 to 12, which is used as a part of a device for displaying a color image, or as a part of a facility for observing a color image, or used in combination with the device or the equipment. filter. 14. The light transmission filter according to claim 13, wherein the device for displaying a color image is an electronic display device. The light transmission filter according to claim 13, wherein the color image observation facility is a viewing window. 15. The light transmission filter according to claim 14, wherein the electronic display device is a cathode ray tube, a fluorescent display tube, an electroluminescent panel, a light emitting diode, a plasma panel, a heating bulb, a laser display, a liquid crystal display, or an electrochromic display.

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