JP2009012215A - Metal-like display body and resin laminate for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material capable of presenting a molding having a metal-like appearance, and of which the color tone of an anchor coat material and the inside of a display body can not be viewed therethrough even when used as an internal illumination type display body. <P>SOLUTION: The laminate is composed of a resin plate and a resin film. (1) The resin plate is a light-transmissive resin plate containing at least one of dye and pigment, and light dispersing particles, the total light transmissivity is in the range of 5% to 30%, the haze is ≥50%, L<SP>*</SP>in CIE 1976 color specification system in color measurement by a reflection method is ≤50%, (2) the resin film is a colorless or colored transparent light-transmissive resin film, having a metal layer formed on the surface thereof to be laminated on the resin plate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display body having a metallic appearance, and more particularly to a resin laminate used for an internal illumination display body.

  For display bodies such as signboards, display bodies having a metallic appearance have been favored and used. Generally, translucent materials with a metallic appearance have a thin film of metal, metal oxide, etc. formed on the surface of transparent resin plates, resin films, etc., but there are problems with weather resistance, moldability, etc. It cannot be used for a display body that is exposed outdoors for a long time such as a signboard.

  In addition, some molded products having a metallic appearance have a metal thin film formed on the surface of an opaque resin such as ABS resin. However, it is difficult to apply the thin film forming technology applied to ABS resin to a transparent resin. As a result, it has been difficult to obtain a molded article having a translucent metallic appearance.

  Patent Document 1 discloses a technique for imparting a uniform metallic appearance to the surface of a resin molded product using a deeply drawn mold.

Patent Document 1 is a molding sheet having a metallic luster in which an anchor coat layer and a vapor deposition layer made of a metal or a metal oxide are laminated on one or both sides of a plastic film as a base material. A molding sheet is disclosed in which a first anchor coat layer made of an acrylic resin and a second anchor coat layer made of a polyurethane resin are sequentially laminated from the substrate side.
Japanese Patent Laying-Open No. 2005-305786

  However, when the sheet-like material proposed in Patent Document 1 is used for an internal illumination type display, if the metal or metal oxide layer is thick, the light transmittance is impaired, and if the metal or metal oxide layer is thin, the metal is lost. There is a problem that a toned appearance is difficult to appear and the color tone of the base substrate and the inside of the display body can be seen through.

  Therefore, an object of the present invention is to provide a material that has a metallic appearance and can provide a molded product that cannot be seen through the color tone of the base substrate or the inside of the display body even when used as an internal illumination type display body. It is in.

The present invention is a laminate of a resin plate and a resin film, (1) the resin plate is a translucent resin plate containing at least one of a dye and a pigment and particles for diffusing light. The total light transmittance is 5% or more and 30% or less, the haze is 50% or more, and L ^{* of the} CIE 1976 color system is 50 or less in color measurement by reflection method. (2) The resin film is colorless and transparent or colored It is a laminate that is transparent and is a translucent resin film in which a metal layer is formed on the side of the resin film that is laminated with the resin plate.

  By coloring the resin plate according to the present invention, it is possible to maintain a metallic appearance even when the metal layer is thin, and by adding particles that diffuse light, the inside can be maintained while maintaining translucency. Produced an effect that could not be seen through. This makes it possible to produce a laminate that has a light-transmitting metallic appearance and cannot be seen through.

  The resin plate or resin film in the laminate of the present invention can be used as long as it is a transparent resin. Examples thereof include acrylic resins, polycarbonate resins, polyester resins, polyvinyl chloride resins, and the like. It is also possible to use one or a combination of two or more. An acrylic resin is preferable from the viewpoint of weather resistance.

  As the dyes and pigments for coloring the resin plate, commercially available dyes and pigments for coloring the resin can be used. The color tone to be colored can be freely selected according to the intended design, but an achromatic color (so-called smoke color) or a color tone close to it is preferable in order to enhance the metallic appearance.

  Commercially available inorganic and organic fillers and pigments can be used as the particles (light diffusing agent) for diffusing light added to the resin plate. Examples of materials include aluminum hydroxide, calcium carbonate, and barium sulfate. Examples include metal oxide fine particles such as titanium oxide, resin fine particles such as silicone resin, acrylic resin, styrene resin, and melamine resin, and glass beads. These may be used alone or in combination of two or more. It is also possible to do.

The concentration of the dye and pigment and the concentration of the particles for diffusing light can be arbitrarily determined, but the total light transmittance measured by the method shown in the light transmittance measuring method B of JISK7105 of the resin plate is 5 % And 30% or less, haze of 50% or more, and L ^{* of the} CIE 1976 color system must be 50 or less in color measurement by the reflection method of JIS Z8722. When the total light transmittance is lower than 5%, the translucency is low and the brightness when used as a display panel is insufficient. When the total light transmittance is higher than 30%, it is difficult to obtain a metallic appearance. When the haze is lower than 50%, the inside of the display body is easily seen through and the appearance is deteriorated. When L ^{* of the} CIE 1976 color system exceeds 50, it becomes difficult to obtain a metallic appearance.

  The thickness of the resin plate can be arbitrarily set according to the purpose as long as the above conditions are satisfied.

  The metal layer of the resin film is formed on the surface side to be laminated with the resin plate, that is, inside the laminated body, from the viewpoint of preventing metal oxidative deterioration. In addition, as for the thickness of a resin film, 25-75 micrometers is preferable.

  The metal type of the metal layer is preferably a layer containing at least one metal selected from the group consisting of indium, tin, gold, silver, and copper, and these may be used alone or in combination of two or more. Can be used. Although the formation method of a metal layer is not specifically limited, The well-known vacuum evaporation method, sputtering method, etc. can be used. The thickness of the metal layer is preferably 1 nm or more for obtaining a metallic appearance, and preferably 50 nm or less for obtaining translucency.

  In forming the metal layer on the resin film, an anchor coat layer as described in Patent Document 1 may be provided on the resin film. In that case, the anchor coat layer is also preferably formed using a light-transmitting material.

  The lamination method of a resin plate and a resin film is not specifically limited, For example, a well-known lamination method etc. are applicable. In that case, let a metal layer be the surface side of the resin film laminated | stacked with a resin board.

  The laminate obtained by the above method can be formed into a molded product having a desired shape by a known molding method such as pressure molding or vacuum molding.

  It can be set as internal illumination type display bodies, such as a signboard and a display, using the said laminated body or molded article.

Examples are given below. In addition, the numerical value in an Example was measured with the following measuring apparatus.
Total light transmittance: Using a Murakami Color Research Laboratory RT-100 haze meter
It measured by the light transmittance measuring method B of JIS K7105.
Haze; Using Murakami Color Research Laboratory RT-100 type haze meter
It measured by the light transmittance measuring method B of JIS K7105.
L ^* : Using SM-T color meter manufactured by Suga Test Instruments Co., Ltd. to JIS Z8722
Measured by color measurement (reflection method)

[Example 1]
Smoke-colored translucent 400 × 400 × 4 mm thick acrylic plate (made by Mitsubishi Rayon, trade name “Acrylite S N937”, total light transmittance: 9%, haze: containing colorant (pigment) and light diffusing agent inside 90%, L ^* : 2.4), an indium thin film formed on one side of an acrylic film, and further coated with an adhesive (made by Oike Kogyo Co., Ltd., “Ecomold”, thickness 50 μm) ) Was laminated on the acrylic plate at room temperature using a commercially available roll laminator to obtain a laminate.

  When the obtained laminate was attached to an internal illumination type signboard and the appearance was evaluated, the appearance of a metal tone was good when the illumination was turned off, and the illumination was transmitted outside the laminate when the illumination was turned on. The inside of the signboard could not be seen through.

[Example 2]
The laminated body obtained in Example 1 is formed into a letter shape by vacuum forming at 170 ° C. using a vacuum forming machine (CSV1015 manufactured by Fuse Vacuum Co., Ltd.) and a male shape (wooden shape) having a Roman letter A shape. Got the body.

  When the obtained molded body was attached to an internal illumination type signboard and the appearance was evaluated, when the illumination was turned off, the metallic appearance was good, and when the illumination was turned on, the molded body was transmitted while the illumination light was transmitted to the outside. The inside of the signboard could not be seen through.

[Example 3]
In place of the acrylic plate used in Example 1, a laminate was prepared in the same manner as in Example 1 except that a 4 mm thick acrylic plate having a total light transmittance of 15%, a haze of 80%, and L ^* : 12 was used. Obtained.

  When the obtained laminate was attached to an internal illumination type signboard and the appearance was evaluated, the appearance of a metal tone was good when the illumination was turned off, and the illumination was transmitted outside the laminate when the illumination was turned on. The inside of the signboard could not be seen through.

[Example 4]
In place of the acrylic plate used in Example 1, a laminate was prepared in the same manner as in Example 1 except that a 4 mm thick acrylic plate having a total light transmittance of 25%, haze: 72%, and L ^* : 18 was used. Obtained.

  When the obtained laminate was attached to an internal lighting type signboard and the appearance was evaluated, the appearance of a metal tone was good when the illumination was turned off, and the illumination was transmitted outside the laminate when the illumination was turned on. The inside of the signboard could not be seen through.

[Comparative Example 1]
Instead of the smoke-colored translucent acrylic plate in Example 1, a white translucent 4 mm thick acrylic plate containing a light diffusing agent inside the acrylic plate (product name “Acrylite L # 430”, manufactured by Mitsubishi Rayon Co., Ltd.) A laminate was obtained in the same manner as in Example 1 except that 25%, haze: 95%, and L ^* : 80) were used, and the appearance was evaluated by attaching the laminate to an internally illuminated signboard. When the lighting was turned on, the inside of the signboard could not be seen through through the laminate while passing through the outside of the laminate, which was good. It was bad.

[Comparative Example 2]
Instead of the smoke-colored translucent acrylic plate in Example 1, a smoke-colored transparent 4 mm thick acrylic plate containing a coloring agent inside the acrylic plate (product name “Acrylite L # 530”, manufactured by Mitsubishi Rayon) Total light transmittance: 18 %, Haze: 0.5%, L ^* : 1.4) was used in the same manner as in Example 1 to obtain a laminate, which was attached to an internally illuminated sign and evaluated for appearance. When the illumination was turned off, the metallic appearance was good. However, when the illumination was turned on, the illumination light was transmitted to the outside of the laminate, but it was defective because the inside of the signboard could be seen through the laminate.

[Comparative Example 3]
Instead of the smoke-colored translucent acrylic plate in Example 1, a colorless and transparent 4 mm thick acrylic plate (product name “Acrylite L # 001” manufactured by Mitsubishi Rayon Co., Ltd.) Total light transmittance: 93%, haze: 0.5%, A laminate was obtained in the same manner as in Example 1 except that L ^* : 1.4) was used, and the laminate was attached to an internally illuminated sign and evaluated for appearance. The appearance when the illumination was turned off was poor because the metallic luster was weak, and when the illumination was turned on, the illumination light was transmitted to the outside of the laminate, but the interior of the signboard could be seen through the laminate.

[Comparative Example 4]
Example 1 except that instead of the smoke-colored translucent acrylic plate in Example 1, a smoke-colored acrylic plate (4 mm thick) having a total light transmittance of 20%, haze: 12%, L ^* : 7) was used. In the same manner as above, a laminate was obtained and attached to an internally illuminated signboard to evaluate the appearance. The appearance when the illumination was turned off was good with a metallic appearance, but when the illumination was turned on, the illumination light was transmitted to the outside of the laminate, but it was not good because the inside of the signboard could be seen through the laminate.

[Comparative Example 5]
Example except that a white translucent acrylic plate (4 mm thickness) having total light transmittance: 43%, haze: 88%, L ^* : 60) was used instead of the smoke-colored translucent acrylic plate in Example 1. The laminate was obtained in the same manner as in No. 1 and attached to an internal illumination signboard to evaluate the appearance. When the lighting was turned on, the inside of the signboard could not be seen through through the laminate while passing through the outside of the laminate, which was good. It was bad.

  The above results are summarized in Table 1 below.

  According to the present invention, it is possible to provide a display body that has a metallic luster in the daytime and emits light by internal illumination at nighttime.

Claims (5)

A laminate of a resin plate and a resin film,
(1) The resin plate is a translucent resin plate containing at least one of a dye and a pigment and particles for diffusing light, and has a total light transmittance of 5% to 30% and a haze of 50. %, L ^{* of the} CIE 1976 color system in color measurement by the reflection method is 50 or less,
(2) The laminated body which is the translucent resin film in which the said resin film is colorless and transparent or colored and transparent, and the metal layer is formed in the surface side laminated | stacked with the said resin board.   The laminate according to claim 1, wherein the resin plate and the resin film are made of a resin selected from the group consisting of an acrylic resin, a polycarbonate resin, a polyester resin, and a polyvinyl chloride resin.   The laminate according to claim 1 or 2, wherein the metal layer formed on the resin film is a layer containing at least one metal selected from the group consisting of indium, tin, gold, silver, and copper.   The molded product which shape | molded the laminated body of any one of Claims 1 thru | or 3.   The internal illumination type display body using the laminated body of any one of Claims 1 thru | or 3, or the molded article of Claim 4.