WO2014020720A1 - Sheet for image for transmitted light, and image sheet obtained using same for transmitted light - Google Patents

Sheet for image for transmitted light, and image sheet obtained using same for transmitted light Download PDF

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Publication number
WO2014020720A1
WO2014020720A1 PCT/JP2012/069575 JP2012069575W WO2014020720A1 WO 2014020720 A1 WO2014020720 A1 WO 2014020720A1 JP 2012069575 W JP2012069575 W JP 2012069575W WO 2014020720 A1 WO2014020720 A1 WO 2014020720A1
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Prior art keywords
light
resin layer
image
sheet
transmitted light
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PCT/JP2012/069575
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French (fr)
Japanese (ja)
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松本巖
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株式会社フオトクラフト社
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Priority to PCT/JP2012/069575 priority Critical patent/WO2014020720A1/en
Priority to JP2014527890A priority patent/JPWO2014020720A1/en
Publication of WO2014020720A1 publication Critical patent/WO2014020720A1/en

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
    • D03D15/267—Glass
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
    • D03D15/46—Flat yarns, e.g. tapes or films
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/20—Physical properties optical

Definitions

  • the present invention relates to an image sheet for forming an advertising panel or the like disposed in a station premises, a hotel, a department store, or the like, and an image sheet using the image sheet.
  • This type of image sheet is formed by coating the base material serving as a support with a resin layer that forms a sealing layer, a light diffusion layer, an image receiving layer, a protective layer, etc. Light diffusivity and light transmission are applied so that light is emitted from the back side (in other words, the backlight) is diffused and transmitted through an appropriate amount of light while the light is irradiated from the back side. It has a sheet shape.
  • a white pigment or a titanium oxide which is an example of a light diffusing agent, is mixed in a flame-retardant acrylic resin (an example of a base resin) in a resin layer covering a substrate made of glass cloth.
  • a flame-retardant acrylic resin an example of a base resin
  • the substrate made of glass cloth is nonflammable
  • the light diffusion layer covering it is based on a flame retardant acrylic resin, and particularly has a flameproofing action.
  • the flameproofness is sufficient because it has good flame retardancy mixed with titanium oxide which is an example of a non-white pigment or a light diffusing material.
  • the present invention has been made in view of the above-described actual situation, and the main problem is to efficiently obtain good light diffusibility and high flameproofness by rational improvement.
  • a first characteristic configuration of the present invention is an image sheet for transmitted light that is formed into a sheet shape having light diffusibility and light transmittance by covering a base material made of glass cloth with a resin layer,
  • the resin layer is configured as a flame retardant light diffusing layer by mixing a particulate inorganic flame retardant having light diffusibility into a base resin instead of a white pigment or light diffusing agent. It is in.
  • the second characteristic configuration of the present invention is that antimony trioxide is mixed in the resin layer as a particulate inorganic flameproof agent having light diffusibility.
  • a third characteristic configuration of the present invention is that a halogen-based flameproofing agent is further mixed in the resin layer.
  • the resin layer is composed of an inner resin layer located on the inner side which is the substrate side, and an outer resin layer located outside the inner resin layer.
  • the inorganic flameproofing agent is mixed in each of the inner resin layer and the outer resin layer, The mixing ratio of the inorganic flameproofing agent in the outer resin layer is set higher than the mixing ratio of the inner resin layer.
  • the fifth characteristic configuration of the present invention is that an image is formed on the outer surface of the transmitted light image sheet described in the first to fourth characteristic configurations in the transmitted light image sheet.
  • the present inventors have found that some flame retardants that have only been additionally mixed until now have a certain degree of light diffusibility, and have a particle shape having light diffusibility. Even if the flameproofing agent is replaced with a base resin instead of a white pigment or a light diffusing agent (hereinafter referred to as a light diffusing agent or the like), a light diffusing layer suitable for an image sheet for transmitted light can be formed. I found out.
  • the said resin layer replaces the particulate inorganic flame retardant which has light diffusibility into a base resin instead of a light diffusing agent etc., and is used as a flame retardant light diffusing layer. Since it is configured, the state in which the inorganic flame retardant is also used as a light diffusing agent or the like (that is, by the light diffusing action of the inorganic flame retardant while enhancing the flame proofing by the flame retardant action of the inorganic flame retardant In a state where light diffusibility is imparted), a flame retardant light diffusing layer can be formed on the outside of the base material made of non-combustible glass cloth, and efficient light diffusivity and high flameproofness can be efficiently achieved Obtainable.
  • the light diffusion layer is formed using a white pigment
  • the yellow color generally contained in the white pigment changes the color temperature of the light source (yellowing). Accordingly, such inconvenience can be avoided.
  • an inorganic flame retardant having a refractive index of about 1.5 to 2.5 is preferable.
  • a light diffusing agent or the like is used as an auxiliary to the particulate inorganic flameproof agent having light diffusibility. You may make it mix in resin.
  • an image sheet 1 for reflected light and transmitted light (an example of an image sheet for transmitted light according to the present invention) used for an advertisement panel or the like, and this image sheet 1 is a support.
  • the base material 2 By covering the base material 2 with the resin layer 3, the light from the front side is reflected appropriately, and the light from the back side is transmitted while being appropriately diffused, light transmissive and light diffusive. It is comprised in the sheet form which has.
  • the base material 2 is a translucent glass cloth formed by plain weaving of a glass yarn 2A formed by bundling a large number of glass filaments (in other words, a single fiber of glass) 2a.
  • the diameter (nominal diameter) of the glass filament 2a is preferably in the range of 4 ⁇ m to 9 ⁇ m, and in this example is 6 ⁇ m.
  • the yarn width of the glass yarn 2A is preferably in the range of 0.1 mm to 0.5 mm, and 0.3 mm is adopted in this example.
  • the gap width w1 of the weave of the substrate 2 made of glass cloth is preferably in the range of 0.05 mm to 0.2 mm, and is preferably smaller than the yarn width w2 of the glass yarn 2A. Both directions are set to 0.1 mm.
  • the woven density of the base material 2 made of glass cloth is preferably in the range of 50 to 70/25 mm in both the vertical and horizontal directions.
  • the vertical direction is 60/25 mm and the horizontal direction is 57/25 mm. It is 25 mm.
  • the base material 2 has an overall thickness of about 0.05 to 0.2 mm (0.1 mm in this example) and an overall mass of about 50 to 150 g / m 2 (110 g / m 2 in this example). It is said.
  • Each of the resin layers 3 is configured by laminating a first resin layer 3A, a second resin layer 3B, and a third resin layer 3C from the inner side to the outer side (that is, the front side and the back side) of the substrate 2 side. ing.
  • the first resin layer 3A is a sealing layer that mainly seals the base material 2 (prevents fraying) and is made of a urethane-based resin.
  • the first resin layer 3A is configured, for example, by impregnating the base material 2 with a urethane resin having a mass of about 7 g / m 2 (about 14 g / m 2 on both sides).
  • the second resin layer 3B is a layer that serves as both a reinforcing layer that increases the strength of the sheet and a light diffusing layer.
  • the second resin layer 3B has a polyvinyl chloride resin as a main component and has been conventionally used to impart light diffusibility.
  • a white pigment or a light diffusing agent for example, titanium oxide or silica
  • antimony trioxide which is an example of an inorganic flame retardant having light diffusibility is added. That is, the white resin and the light diffusing agent conventionally used are not mixed in the second resin layer.
  • the second resin layer 3B is made of, for example, 83.3 mass percent of polyvinyl chloride resin, 4.1 mass percent of antimony trioxide, and a bromine compound (an example of a halogen compound) that mainly functions as a flameproofing agent. and 9.7 weight percent, and the total mass is formed in about 7.2 g / m 2 (about 22.4 g / m 2 in both sides).
  • the mixing rate of antimony trioxide in the second resin layer 3B is preferably 2.0 to 10.0 mass percent, and the mixing rate of the bromine-based compound in the second resin layer 3B is 5.0 to 10.0%. 15.0 weight percent is preferred.
  • the third resin layer 3C is a layer that serves as both an image receiving layer and a light diffusing layer.
  • the white resin or light diffusing agent that has been conventionally used for imparting light diffusibility is mainly composed of a urethane resin. Instead of (for example, titanium oxide or silica), antimony trioxide which is an example of an inorganic flameproofing agent having light diffusibility is added. That is, the white resin and the light diffusing agent conventionally used are not mixed in the third resin layer 3C.
  • the third resin layer 3C has, for example, 59.4 mass percent of urethane resin, 11.7 mass percent of antimony trioxide, and 27.4 mass percent of a bromine compound that mainly functions as a flameproofing agent. mass is configured to approximately 11.2 g / m 2 (about 22.4 g / m 2 in both sides).
  • the mixing ratio of antimony trioxide in the third resin layer 3C is set higher than the mixing ratio of antimony trioxide in the second resin layer 3B. Further, the mixing ratio of the bromine compound in the third resin layer 3C is set higher than the mixing ratio of the bromine compound in the second resin layer 3B.
  • the mixing rate of antimony trioxide in the third resin layer 3C is preferably 5.0 to 15.0 mass percent, and the mixing rate of the bromine-based compound in the second resin layer 3B is 15.0 to 40. 0 weight percent is preferred.
  • an inorganic flame retardant having a refractive index of about 1.5 to 2.5 is preferable.
  • Antimony trioxide having a refractive index of about 2.0 is preferable from the viewpoint of both flameproofing and light diffusing properties.
  • the particle size of antimony trioxide for constituting the light diffusion layer is preferably in the range of 1.0 to 3.0 ⁇ m in order to obtain uniform light diffusibility and light transmittance with little unevenness in the sheet surface direction. Then, the thickness is set to 1.5 to 2.0 ⁇ m.
  • the particle size of the bromine compound mixed in the light diffusion layer is preferably in the range of 3.0 to 10.0 ⁇ m, and in this example, the particle size is 5.0 to 7.0 ⁇ m.
  • the image sheet 1 thus configured is in a state where the inorganic flameproofing agent is also used as a light diffusing agent or the like (that is, while improving the flameproofing property by the flameproofing action of the inorganic flameproofing agent, the inorganic flameproofing agent). Since the flame retardant light diffusing layer (that is, the second resin layer 3B and the third resin layer 3C) is configured in a state in which the light diffusibility is imparted by the light diffusing action of the agent, High flameproofness can be obtained efficiently.
  • the flame retardant light diffusing layer that is, the second resin layer 3B and the third resin layer 3C
  • a plurality (two in this example) of glass yarns 2A and the resin layer 3 are polymerized so as to exhibit light diffusibility and light transmission suitable for color development of transmitted light.
  • the front side image G1 is printed on the front surface of the image sheet 1
  • the back side image G2 is printed on the back surface of the image sheet 1 with the sheet 1 being sandwiched and overlapping the front side image G1.
  • an image sheet 4 capable of projecting a natural and clear suitable image both in the reflected light from sunlight during the daytime and the transmitted light from the backlight in the nighttime.
  • Each of the images G1 and G2 is an ink layer and can employ various configurations capable of forming an image.
  • a pigment or the like is added to an acrylic resin, and the total mass is 5 g. / M 2 (about 10 g / m 2 on both sides).
  • the entire thickness of the image sheet 4 is about 0.05 to 0.2 mm (in this example, about 0.1 mm), and the total mass of the image sheet 4 is about 100 to 200 g / m 2 (in this example, about 0.1 mm). 150 g / m 2 ).
  • the image sheet 1 and the image sheet 4 for reflected light / transmitted light used for both reflected light and transmitted light are shown as an example. It may be a sheet or an image sheet.
  • the case where the light diffusion layer is formed from the two resin layers of the second resin layer 3B and the third resin layer 3C has been described as an example, but the light diffusion is performed from one type or three or more types of resin layers.
  • a layer may be formed.
  • the base material 2 is coated with a resin layer having a multilayer structure is shown as an example, but it may be coated with a resin layer having a single layer structure.
  • the antimony trioxide contamination rate of the outer resin layer (third resin layer 3C) is set higher than the antimony trioxide contamination rate of the inner resin layer (second resin layer 3B).
  • the mixing ratio of antimony trioxide in the outer resin layer (third resin layer 3C) is equal to or more than the mixing ratio of antimony trioxide in the inner resin layer (second resin layer 3B). May be set lower.
  • the inorganic flame retardant having light diffusibility mixed in the light diffusion layer is not limited to antimony trioxide shown in the above embodiment, and various inorganic flame retardants having light diffusibility may be used. it can.
  • the present invention can be suitably applied not only to the announcement panel but also to various objects that need to be colored by illumination from the back side.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The purpose of the present invention is to efficiently obtain satisfactory light-diffusing properties and high flameproof properties. A base (2) constituted of glass cloth is coated with resinous layers (3B, 3C) to configure a sheet that has light-diffusing properties and light-transmitting properties. The resinous layers (3B, 3C) have been configured as flame-retardant light-diffusing layers by incorporating a particulate inorganic flameproofing agent having light-diffusing properties in place of a white pigment or light-diffusing agent into a base resin.

Description

透過光用の画像用シート、及び、それを用いた透過光用の画像シートImage sheet for transmitted light, and image sheet for transmitted light using the same
　本発明は、駅構内やホテルやデパート等に配設される広告パネル等を形成するための画像用シート及びそれを用いた画像シートに関する。 The present invention relates to an image sheet for forming an advertising panel or the like disposed in a station premises, a hotel, a department store, or the like, and an image sheet using the image sheet.
　この種の画像用シートは、目止め層や光拡散層、受像層、保護層などを形成する樹脂層で支持体となる基材を被覆することで、表面や裏面に画像を形成して裏側（背面側）から光を照射した状態で、その裏側からの照射光（換言すれば、バックライト）を適度に拡散させながら透過させて画像を発色させるように、光拡散性と光透過性を有するシート状に構成されたものである。 This type of image sheet is formed by coating the base material serving as a support with a resin layer that forms a sealing layer, a light diffusion layer, an image receiving layer, a protective layer, etc. Light diffusivity and light transmission are applied so that light is emitted from the back side (in other words, the backlight) is diffused and transmitted through an appropriate amount of light while the light is irradiated from the back side. It has a sheet shape.
　そして、従来、支持体となる基材の材料に不燃性のガラスクロスを採用することで、防炎性を高めることが提案されている（下記特許文献１参照）。 In the past, it has been proposed to improve the flame resistance by adopting a non-combustible glass cloth as a base material serving as a support (see Patent Document 1 below).
　この従来の画像用シートでは、ガラスクロスからなる基材を被覆する樹脂層中に、良燃性のアクリル樹脂（ベース樹脂の一例）に白色系顔料又は光拡散剤の一例である酸化チタンを混入してなる光拡散層を形成していた。 In this conventional image sheet, a white pigment or a titanium oxide, which is an example of a light diffusing agent, is mixed in a flame-retardant acrylic resin (an example of a base resin) in a resin layer covering a substrate made of glass cloth. Thus, a light diffusion layer was formed.
特開２００７－２０３７２４号公報JP 2007-203724 A
　しかしながら、上記従来の画像用シートは、ガラスクロスからなる基材は不燃性であるものの、それを被覆する光拡散層が、良燃性のアクリル樹脂をベース樹脂とし、且つ、特に防炎作用のない白色系顔料又は光拡散材の一例である酸化チタンを混入した良燃性であるため、防炎性が十分とまでは言い難く、この点に未だ改善の余地があった。 However, in the above conventional image sheet, although the substrate made of glass cloth is nonflammable, the light diffusion layer covering it is based on a flame retardant acrylic resin, and particularly has a flameproofing action. There is still room for improvement in this respect because it is difficult to say that the flameproofness is sufficient because it has good flame retardancy mixed with titanium oxide which is an example of a non-white pigment or a light diffusing material.
　本発明は、上述の実状に鑑みて為されたものであって、その主たる課題は、合理的な改良により、良好な光拡散性と高い防炎性を効率的に得る点にある。 The present invention has been made in view of the above-described actual situation, and the main problem is to efficiently obtain good light diffusibility and high flameproofness by rational improvement.
　本発明の第１特徴構成は、ガラスクロスからなる基材を樹脂層で被覆して光拡散性と光透過性を有するシート状に構成された透過光用の画像用シートであって、
　前記樹脂層が、光拡散性を有した粒子状の無機系防炎剤を白色系顔料又は光拡散剤に代えてベース樹脂に混入することで難燃性の光拡散層として構成されている点にある。 A first characteristic configuration of the present invention is an image sheet for transmitted light that is formed into a sheet shape having light diffusibility and light transmittance by covering a base material made of glass cloth with a resin layer,
The resin layer is configured as a flame retardant light diffusing layer by mixing a particulate inorganic flame retardant having light diffusibility into a base resin instead of a white pigment or light diffusing agent. It is in.
　本発明の第２特徴構成は、前記樹脂層には、前記光拡散性を有した粒子状の無機系防炎剤として、三酸化アンチモンが混入されている点にある。 The second characteristic configuration of the present invention is that antimony trioxide is mixed in the resin layer as a particulate inorganic flameproof agent having light diffusibility.
　本発明の第３特徴構成は、前記樹脂層には、ハロゲン系防炎剤が更に混入されている点にある。 A third characteristic configuration of the present invention is that a halogen-based flameproofing agent is further mixed in the resin layer.
　本発明の第４特徴構成は、前記樹脂層が、前記基材の側となる内側に位置する内側樹脂層と、その内側樹脂層の外側に位置する外側樹脂層とから構成され、
　前記内側樹脂層と外側樹脂層との各々に前記無機系防炎剤が混入されているとともに、
　前記外側樹脂層の前記無機系防炎剤の混入率が、前記内側樹脂層の前記混入率よりも高く設定されている点にある。 According to a fourth feature of the present invention, the resin layer is composed of an inner resin layer located on the inner side which is the substrate side, and an outer resin layer located outside the inner resin layer.
The inorganic flameproofing agent is mixed in each of the inner resin layer and the outer resin layer,
The mixing ratio of the inorganic flameproofing agent in the outer resin layer is set higher than the mixing ratio of the inner resin layer.
　本発明の第５特徴構成は、透過光の画像シートにおいて、第１～第４特徴構成に記載の透過光用の画像用シートの外面に画像が形成されている点にある。 The fifth characteristic configuration of the present invention is that an image is formed on the outer surface of the transmitted light image sheet described in the first to fourth characteristic configurations in the transmitted light image sheet.
　つまり、本発明者は、鋭意研究の結果、これまで付加的に混入されるに留まっていた防炎剤の中にもある程度の光拡散性を有するものが存在し、光拡散性を有する粒子状の防炎剤を白色系顔料又は光拡散剤（以下、光拡散剤等と称する）に代えてベース樹脂に混入しても、透過光用の画像用シートに好適な光拡散層を形成し得ることを知見した。 In other words, as a result of earnest research, the present inventors have found that some flame retardants that have only been additionally mixed until now have a certain degree of light diffusibility, and have a particle shape having light diffusibility. Even if the flameproofing agent is replaced with a base resin instead of a white pigment or a light diffusing agent (hereinafter referred to as a light diffusing agent or the like), a light diffusing layer suitable for an image sheet for transmitted light can be formed. I found out.
　そして、本発明によれば、前記樹脂層が、光拡散性を有した粒子状の無機系防炎剤を光拡散剤等に代えてベース樹脂に混入することで難燃性の光拡散層として構成されているから、無機系防炎剤を光拡散剤等に兼用する状態（つまり、無機系防炎剤の防炎作用によって防炎性を高めながら、無機系防炎剤の光拡散作用による光拡散性を付与する状態）で、不燃性のガラスクロスからなる基材の外側に難燃性の光拡散層を構成することができ、良好な光拡散性と高い防炎性を効率的に得ることができる。 And according to this invention, the said resin layer replaces the particulate inorganic flame retardant which has light diffusibility into a base resin instead of a light diffusing agent etc., and is used as a flame retardant light diffusing layer. Since it is configured, the state in which the inorganic flame retardant is also used as a light diffusing agent or the like (that is, by the light diffusing action of the inorganic flame retardant while enhancing the flame proofing by the flame retardant action of the inorganic flame retardant In a state where light diffusibility is imparted), a flame retardant light diffusing layer can be formed on the outside of the base material made of non-combustible glass cloth, and efficient light diffusivity and high flameproofness can be efficiently achieved Obtainable.
　しかも、白色系顔料を用いて光拡散層を形成する場合では、一般に白色系顔料に幾分か含まれる黄色系の色が光源の色温度を変化（黄変）させる不都合が生じるが、上記構成によれば、このような不都合も回避することができる。 In addition, in the case where the light diffusion layer is formed using a white pigment, there is a disadvantage that the yellow color generally contained in the white pigment changes the color temperature of the light source (yellowing). Accordingly, such inconvenience can be avoided.
　なお、光拡散性を有した無機系防炎剤としては、１．５～２．５程度の屈折率を有した無機系防炎剤が好ましい。 In addition, as the inorganic flame retardant having light diffusibility, an inorganic flame retardant having a refractive index of about 1.5 to 2.5 is preferable.
　本発明の透過光用の画像用シート、及び、それを用いた透過光用の画像シートの実施において、光拡散性を有した粒子状の無機系防炎剤の補助として光拡散剤等をベース樹脂に混入するようにしてもよい。 In the implementation of the transmitted light image sheet of the present invention and the transmitted light image sheet using the same, a light diffusing agent or the like is used as an auxiliary to the particulate inorganic flameproof agent having light diffusibility. You may make it mix in resin.
画像用シートの平面図Plan view of image sheet 図１のＩＩ－ＩＩ線断面図II-II sectional view of FIG. 図１のＩＩＩ－ＩＩＩ線断面図III-III sectional view of FIG. 画像用シートの層構成を模式的に示す断面図Sectional drawing which shows the layer structure of the sheet | seat for an image typically 画像シートの層構成を模式的に示す断面図Sectional drawing which shows the layer structure of an image sheet typically
　図１～図４は、広告パネル等に用いられる反射光・透過光用の画像用シート１（本発明の透過光用の画像用シートの一例）を示し、この画像用シート１は、支持体となる基材２を樹脂層３で被覆することで、表側からの光が適切に反射し、且つ、裏側からの光が適度に拡散しながら透過する光反射性と光透過性と光拡散性を有するシート状に構成されている。 1 to 4 show an image sheet 1 for reflected light and transmitted light (an example of an image sheet for transmitted light according to the present invention) used for an advertisement panel or the like, and this image sheet 1 is a support. By covering the base material 2 with the resin layer 3, the light from the front side is reflected appropriately, and the light from the back side is transmitted while being appropriately diffused, light transmissive and light diffusive. It is comprised in the sheet form which has.
　前記基材２は、多数本のガラスフィラメント（換言すれば、ガラスの単繊維）２ａを束ねてなるガラスヤーン２Ａを平織りして構成された半透明色のガラスクロスである。 The base material 2 is a translucent glass cloth formed by plain weaving of a glass yarn 2A formed by bundling a large number of glass filaments (in other words, a single fiber of glass) 2a.
　前記ガラスフィラメント２ａの直径（呼び径）は４μｍ～９μｍの範囲が好ましく、本例では６μｍとしている。 The diameter (nominal diameter) of the glass filament 2a is preferably in the range of 4 μm to 9 μm, and in this example is 6 μm.
　また、前記ガラスヤーン２Ａの番手（ｔｅｘ＝長さ１ｋｍ当たりの重量）は１０ｔｅｘ～４０ｔｅｘの範囲が好ましく、本例では２２．５ｔｅｘとしている。 The count of the glass yarn 2A (tex = weight per 1 km length) is preferably in the range of 10 tex to 40 tex, and in this example, 22.5 tex.
　そしてまた、このガラスヤーン２Ａの糸幅は、０．１ｍｍ～０．５ｍｍの範囲が好ましく、本例では０．３ｍｍを採用している。 Further, the yarn width of the glass yarn 2A is preferably in the range of 0.1 mm to 0.5 mm, and 0.3 mm is adopted in this example.
　ガラスクロスからなる基材２の織り目の隙間幅ｗ１は、０．０５ｍｍ～０．２ｍｍの範囲が好ましく、また、ガラスヤーン２Ａの糸幅ｗ２よりも小さいのが好ましく、本例では縦方向及び横方向のいずれも０．１ｍｍとしている。 The gap width w1 of the weave of the substrate 2 made of glass cloth is preferably in the range of 0.05 mm to 0.2 mm, and is preferably smaller than the yarn width w2 of the glass yarn 2A. Both directions are set to 0.1 mm.
　ガラスクロスからなる基材２の織密度は、縦方向と横方向の両方において５０～７０本／２５ｍｍの範囲が好ましく、本例では、縦方向を６０本／２５ｍｍとし、横方向を５７本／２５ｍｍとしている。 The woven density of the base material 2 made of glass cloth is preferably in the range of 50 to 70/25 mm in both the vertical and horizontal directions. In this example, the vertical direction is 60/25 mm and the horizontal direction is 57/25 mm. It is 25 mm.
　なお、基材２は、全体の厚さを０．０５～０．２ｍｍ程度（本例では０．１ｍｍ）とし、全体の質量を５０～１５０ｇ／ｍ２程度（本例では１１０ｇ／ｍ２）としている。 The base material 2 has an overall thickness of about 0.05 to 0.2 mm (0.1 mm in this example) and an overall mass of about 50 to 150 g / m 2 (110 g / m 2 in this example). It is said.
　前記樹脂層３の夫々は、基材２の側の内側から外側（つまり、表側と裏側）に向かって第１樹脂層３Ａ、第２樹脂層３Ｂ、第３樹脂層３Ｃを積層して構成されている。 Each of the resin layers 3 is configured by laminating a first resin layer 3A, a second resin layer 3B, and a third resin layer 3C from the inner side to the outer side (that is, the front side and the back side) of the substrate 2 side. ing.
　第１樹脂層３Ａは、主として基材２の目止め（ほつれ防止）を行う目止め層であり、ウレタン系樹脂から構成されている。この第１樹脂層３Ａは、例えば、質量が７ｇ／ｍ２程度（両面では１４ｇ／ｍ２程度）のウレタン樹脂を基材２に含浸させることによって構成されている。 The first resin layer 3A is a sealing layer that mainly seals the base material 2 (prevents fraying) and is made of a urethane-based resin. The first resin layer 3A is configured, for example, by impregnating the base material 2 with a urethane resin having a mass of about 7 g / m 2 (about 14 g / m 2 on both sides).
　第２樹脂層３Ｂは、シートの強度を高める強化層と光拡散層とを兼ねた層であり、ポリ塩化ビニル系樹脂を主要構成とし、従来、光拡散性を付与するのに使用されていた白色系顔料又は光拡散剤（例えば、酸化チタンやシリカ）に代えて、光拡散性を有する無機系防炎剤の一例である三酸化アンチモンを添加して構成されている。つまり、この第２樹脂層には、従来使用されていた白色系顔料や光拡散剤は混入されていない。 The second resin layer 3B is a layer that serves as both a reinforcing layer that increases the strength of the sheet and a light diffusing layer. The second resin layer 3B has a polyvinyl chloride resin as a main component and has been conventionally used to impart light diffusibility. Instead of a white pigment or a light diffusing agent (for example, titanium oxide or silica), antimony trioxide which is an example of an inorganic flame retardant having light diffusibility is added. That is, the white resin and the light diffusing agent conventionally used are not mixed in the second resin layer.
　この第２樹脂層３Ｂは、例えば、ポリ塩化ビニル系樹脂を８３．３質量パーセント、三酸化アンチモンが４．１質量パーセント、主として防炎剤として機能する臭素系化合物（ハロゲン系化合物の一例）を９．７質量パーセントとし、全体の質量が７．２ｇ／ｍ２程度（両面では２２．４ｇ／ｍ２程度）に構成されている。 The second resin layer 3B is made of, for example, 83.3 mass percent of polyvinyl chloride resin, 4.1 mass percent of antimony trioxide, and a bromine compound (an example of a halogen compound) that mainly functions as a flameproofing agent. and 9.7 weight percent, and the total mass is formed in about 7.2 g / m 2 (about 22.4 g / m 2 in both sides).
　なお、第２樹脂層３Ｂへの三酸化アンチモンの混入率は、２．０～１０．０質量パーセントが好ましく、また、第２樹脂層３Ｂへの臭素系化合物の混入率は、５．０～１５．０質量パーセントが好ましい。 The mixing rate of antimony trioxide in the second resin layer 3B is preferably 2.0 to 10.0 mass percent, and the mixing rate of the bromine-based compound in the second resin layer 3B is 5.0 to 10.0%. 15.0 weight percent is preferred.
　第３樹脂層３Ｃは、受像層と光拡散層とを兼ねた層であり、ウレタン系樹脂を主要構成とし、従来、光拡散性を付与するのに使用されていた白色系顔料又は光拡散剤（例えば、酸化チタンやシリカ）に代えて、光拡散性を有する無機系防炎剤の一例である三酸化アンチモンを添加して構成されている。つまり、この第３樹脂層３Ｃにも、従来使用されていた白色系顔料や光拡散剤は混入されていない。 The third resin layer 3C is a layer that serves as both an image receiving layer and a light diffusing layer. The white resin or light diffusing agent that has been conventionally used for imparting light diffusibility is mainly composed of a urethane resin. Instead of (for example, titanium oxide or silica), antimony trioxide which is an example of an inorganic flameproofing agent having light diffusibility is added. That is, the white resin and the light diffusing agent conventionally used are not mixed in the third resin layer 3C.
　この第３樹脂層３Ｃは、例えば、ウレタン系樹脂を５９．４質量パーセント、三酸化アンチモンを１１．７質量パーセント、主として防炎剤として機能する臭素系化合物を２７．４質量パーセントとし、全体の質量が１１．２ｇ／ｍ２程度（両面では２２．４ｇ／ｍ２程度）に構成されている。 The third resin layer 3C has, for example, 59.4 mass percent of urethane resin, 11.7 mass percent of antimony trioxide, and 27.4 mass percent of a bromine compound that mainly functions as a flameproofing agent. mass is configured to approximately 11.2 g / m 2 (about 22.4 g / m 2 in both sides).
　つまり、第３樹脂層３Ｃの三酸化アンチモンの混入率は、第２樹脂層３Ｂの三酸化アンチモンの混入率よりも高く設定されている。また、第３樹脂層３Ｃの臭素系化合物の混入率は、第２樹脂層３Ｂの臭素系化合物の混入率よりも高く設定されている。 That is, the mixing ratio of antimony trioxide in the third resin layer 3C is set higher than the mixing ratio of antimony trioxide in the second resin layer 3B. Further, the mixing ratio of the bromine compound in the third resin layer 3C is set higher than the mixing ratio of the bromine compound in the second resin layer 3B.
　第３樹脂層３Ｃへの三酸化アンチモンの混入率は、５．０～１５．０質量パーセントが好ましく、また、第２樹脂層３Ｂへの臭素系化合物の混入率は、１５．０～４０．０質量パーセントが好ましい。 The mixing rate of antimony trioxide in the third resin layer 3C is preferably 5.0 to 15.0 mass percent, and the mixing rate of the bromine-based compound in the second resin layer 3B is 15.0 to 40. 0 weight percent is preferred.
　第２樹脂層３Ｂ、第３樹脂層３Ｃに混入する光拡散性を有する無機系防炎剤としては、１．５～２．５程度の屈折率を有した無機系防炎剤が好ましく、特に、約２．０の屈折率を有した三酸化アンチモンが防炎性と光拡散性の両面から好適である。 As the inorganic flame retardant having light diffusibility mixed in the second resin layer 3B and the third resin layer 3C, an inorganic flame retardant having a refractive index of about 1.5 to 2.5 is preferable. Antimony trioxide having a refractive index of about 2.0 is preferable from the viewpoint of both flameproofing and light diffusing properties.
　光拡散層を構成するための三酸化アンチモンの粒径は、シート面方向でムラの少ない均一な光拡散性と光透過性を得るのに１．０～３．０μｍの範囲が好ましく、本例では、１．５～２．０μｍとしている。 The particle size of antimony trioxide for constituting the light diffusion layer is preferably in the range of 1.0 to 3.0 μm in order to obtain uniform light diffusibility and light transmittance with little unevenness in the sheet surface direction. Then, the thickness is set to 1.5 to 2.0 μm.
　また、光拡散層に混入する臭素系化合物の粒径は、３．０～１０．０μｍの範囲が好ましく、本例では、５．０～７．０μｍとしている。 In addition, the particle size of the bromine compound mixed in the light diffusion layer is preferably in the range of 3.0 to 10.0 μm, and in this example, the particle size is 5.0 to 7.0 μm.
　このように構成された画像用シート１は、無機系防炎剤を光拡散剤等に兼用する状態（つまり、無機系防炎剤の防炎作用によって防炎性を高めながら、無機系防炎剤の光拡散作用による光拡散性を付与する状態）で難燃性の光拡散層（つまり、第２樹脂層３Ｂと第３樹脂層３Ｃ）を構成してあるから、良好な光拡散性と高い防炎性とを効率的に得ることができる。 The image sheet 1 thus configured is in a state where the inorganic flameproofing agent is also used as a light diffusing agent or the like (that is, while improving the flameproofing property by the flameproofing action of the inorganic flameproofing agent, the inorganic flameproofing agent). Since the flame retardant light diffusing layer (that is, the second resin layer 3B and the third resin layer 3C) is configured in a state in which the light diffusibility is imparted by the light diffusing action of the agent, High flameproofness can be obtained efficiently.
　なお、この画像シート１は、透過光での画像の発色に好適な光拡散性・光透過性を発揮するように、複数本（本例では２本）のガラスヤーン２Ａと樹脂層３が重合配置された部分１Ａと、１本のガラスヤーン２Ａと樹脂層３が重合配置された部分１Ｂと、樹脂層３のみが存在する部分１Ｃの光拡散性・光透過性の異なる３種の部分が分散配置されている。 In this image sheet 1, a plurality (two in this example) of glass yarns 2A and the resin layer 3 are polymerized so as to exhibit light diffusibility and light transmission suitable for color development of transmitted light. There are three types of portions having different light diffusivity and light transmittance of the arranged portion 1A, the portion 1B in which the single glass yarn 2A and the resin layer 3 are arranged by polymerization, and the portion 1C in which only the resin layer 3 exists. Distributed.
　そして、この画像用シート１の表面に対して表側画像Ｇ１を印刷するとともに、画像用シート１の裏面に対して該シート１を挟んで表側画像Ｇ１と重なる配置で裏側画像Ｇ２を印刷することで、日中の太陽光による反射光と夜間のバックライトによる透過光の両方において自然で鮮明な好適な画像を映し出し得る画像シート４（図５参照）を形成することができる。 Then, the front side image G1 is printed on the front surface of the image sheet 1, and the back side image G2 is printed on the back surface of the image sheet 1 with the sheet 1 being sandwiched and overlapping the front side image G1. Thus, it is possible to form an image sheet 4 (see FIG. 5) capable of projecting a natural and clear suitable image both in the reflected light from sunlight during the daytime and the transmitted light from the backlight in the nighttime.
　なお、各画像Ｇ１、Ｇ２は、インク層であって、画像を形成し得る種々の構成を採用できるが、本例では、一例として、アクリル系樹脂に顔料等を添加し、全体の質量が５ｇ／ｍ２程度（両面では１０ｇ／ｍ２程度）の層に構成されている。 Each of the images G1 and G2 is an ink layer and can employ various configurations capable of forming an image. In this example, as an example, a pigment or the like is added to an acrylic resin, and the total mass is 5 g. / M 2 (about 10 g / m 2 on both sides).
　また、画像シート４の全体の厚さは０．０５～０．２ｍｍ程度（本例では約０．１ｍｍ）で、画像シート４の全体の質量は１００～２００ｇ／ｍ２程度（本例では約１５０ｇ／ｍ２）である。 The entire thickness of the image sheet 4 is about 0.05 to 0.2 mm (in this example, about 0.1 mm), and the total mass of the image sheet 4 is about 100 to 200 g / m 2 (in this example, about 0.1 mm). 150 g / m 2 ).
　［別実施形態］
　前述の実施形態では、反射光と透過光の両方で使用する反射光・透過光用の画像用シート１及び画像シート４を例に示したが、透過光のみで使用する透過光専用の画像用シート及び画像シートであってもよい。 [Another embodiment]
In the above-described embodiment, the image sheet 1 and the image sheet 4 for reflected light / transmitted light used for both reflected light and transmitted light are shown as an example. It may be a sheet or an image sheet.
　前述の実施形態では、第２樹脂層３Ｂと第３樹脂層３Ｃの２種の樹脂層から光拡散層を形成する場合を例に示したが、１種又は３種以上の樹脂層から光拡散層を形成してもよい。 In the above-described embodiment, the case where the light diffusion layer is formed from the two resin layers of the second resin layer 3B and the third resin layer 3C has been described as an example, but the light diffusion is performed from one type or three or more types of resin layers. A layer may be formed.
　前述の実施形態では、基材２を複層構造の樹脂層で被覆する場合を例に示したが、単層構造の樹脂層で被覆するようにしてもよい。 In the above-described embodiment, the case where the base material 2 is coated with a resin layer having a multilayer structure is shown as an example, but it may be coated with a resin layer having a single layer structure.
　前述の実施形態では、外側樹脂層（第３樹脂層３Ｃ）の三酸化アンチモンの混入率を内側樹脂層（第２樹脂層３Ｂ）の三酸化アンチモンの混入率よりも高く設定されている場合を例に示したが、場合によっては、外側樹脂層（第３樹脂層３Ｃ）の三酸化アンチモンの混入率を内側樹脂層（第２樹脂層３Ｂ）の三酸化アンチモンの混入率と同一又はそれよりも低く設定されていてもよい。 In the embodiment described above, the antimony trioxide contamination rate of the outer resin layer (third resin layer 3C) is set higher than the antimony trioxide contamination rate of the inner resin layer (second resin layer 3B). As shown in the example, depending on the case, the mixing ratio of antimony trioxide in the outer resin layer (third resin layer 3C) is equal to or more than the mixing ratio of antimony trioxide in the inner resin layer (second resin layer 3B). May be set lower.
　光拡散層に混入する光拡散性を有した無機系防炎剤は、前述の実施形態で示した三酸化アンチモンに限らず、光拡散性を有した種々の無機系防炎剤を用いることができる。 The inorganic flame retardant having light diffusibility mixed in the light diffusion layer is not limited to antimony trioxide shown in the above embodiment, and various inorganic flame retardants having light diffusibility may be used. it can.
　本発明は、公告パネルに限らず背面側からの照明で発色させる必要のある種々の物に好適に適用することができる。 The present invention can be suitably applied not only to the announcement panel but also to various objects that need to be colored by illumination from the back side.
　１　　　　　　画像用シート
　２　　　　　　基材
　３Ａ　　　　　第１樹脂層
　３Ｂ　　　　　第２樹脂層（内側樹脂層）
　３Ｃ　　　　　第３樹脂層（外側樹脂層）
　４　　　　　　画像シート
　Ｇ１　　　　　表側画像
　Ｇ２　　　　　裏側画像 DESCRIPTION OF SYMBOLS 1 Image sheet 2 Base material 3A 1st resin layer 3B 2nd resin layer (inner side resin layer)
3C 3rd resin layer (outside resin layer)
4 Image sheet G1 Front side image G2 Back side image

Claims (5)

  1. 　ガラスクロスからなる基材を樹脂層で被覆して光拡散性と光透過性を有するシート状に構成された透過光用の画像用シートであって、
    　前記樹脂層が、光拡散性を有した粒子状の無機系防炎剤を白色系顔料又は光拡散剤に代えてベース樹脂に混入することで難燃性の光拡散層として構成されている透過光用の画像用シート。     An image sheet for transmitted light, which is configured in a sheet shape having a light diffusibility and a light transmittance by covering a substrate made of glass cloth with a resin layer,
    The resin layer is configured as a flame retardant light diffusing layer by mixing a particulate inorganic flame retardant having light diffusibility into a base resin instead of a white pigment or light diffusing agent. Image sheet for light.
  2. 　前記樹脂層には、前記光拡散性を有した粒子状の無機系防炎剤として、三酸化アンチモンが混入されている請求項１記載の透過光用の画像用シート。 The image sheet for transmitted light according to claim 1, wherein the resin layer is mixed with antimony trioxide as a particulate inorganic flame retardant having light diffusibility.
  3. 　前記樹脂層には、ハロゲン系防炎剤が更に混入されている請求項２記載の透過光用の画像用シート。 The image sheet for transmitted light according to claim 2, wherein a halogen-based flameproofing agent is further mixed in the resin layer.
  4. 　前記樹脂層が、前記基材の側となる内側に位置する内側樹脂層と、その内側樹脂層の外側に位置する外側樹脂層とから構成され、
    　前記内側樹脂層と外側樹脂層との各々に前記無機系防炎剤が混入されているとともに、
    　前記外側樹脂層の前記無機系防炎剤の混入率が、前記内側樹脂層の前記混入率よりも高く設定されている請求項１～３のいずれか１項に記載の透過光用の画像用シート。     The resin layer is composed of an inner resin layer located on the inner side which is the side of the base material, and an outer resin layer located on the outer side of the inner resin layer,
    The inorganic flameproofing agent is mixed in each of the inner resin layer and the outer resin layer,
    The transmitted light image according to any one of claims 1 to 3, wherein a mixing ratio of the inorganic flameproofing agent in the outer resin layer is set higher than the mixing ratio of the inner resin layer. Sheet.
  5. 　請求項１～４に記載の透過光用の画像用シートの外面に画像が形成されている透過光用の画像シート。 An image sheet for transmitted light in which an image is formed on the outer surface of the image sheet for transmitted light according to claims 1 to 4.
PCT/JP2012/069575 2012-08-01 2012-08-01 Sheet for image for transmitted light, and image sheet obtained using same for transmitted light WO2014020720A1 (en)

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JP2021117253A (en) * 2020-01-22 2021-08-10 株式会社フォトクラフト社 Sheet for transmitted light and manufacturing method therefor

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JP2010042587A (en) * 2008-08-12 2010-02-25 Photo Craft Co Ltd Incombustible image sheet and image sheet for transmitted light

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JP2021117253A (en) * 2020-01-22 2021-08-10 株式会社フォトクラフト社 Sheet for transmitted light and manufacturing method therefor
JP7269651B2 (en) 2020-01-22 2023-05-09 株式会社フォトクラフト社 Transmitted light sheet and manufacturing method thereof

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