JP4484829B2 - Image sheet for both transmitted and reflected light - Google Patents

Description

The present invention relates to an image sheet for both the transmitted light and reflected light.

  Conventionally, image panels of various sizes for advertisements are often attached to the premises of a station, indoor walls of hotels and department stores. Usually, such an image panel attaches an image sheet on which an image is formed to an appropriate panel frame, and illuminates the back of the image sheet with a fluorescent lamp, EL (electric luminescence light), or the like. The observer can clearly see the image by the transmitted light by the illumination.

  Conventionally, as such an image sheet, a translucent film made of polyester is used as a support, and images are formed on both sides by printing an image using an inkjet printer or the like. In addition, there is also used a photographic film coated with a photosensitive emulsion, and an image printed on the photosensitive emulsion layer and developed (Patent Document 1). An improved polyester support having excellent photographic properties has also been proposed (Patent Document 2).

Further, a transparent resin film layer made of polyester, a first image layer formed on one surface of the resin film layer, a milky layer formed on the surface of the first image layer, and a surface of the milky layer An image sheet having a formed second image layer has also been proposed (Patent Document 3).
JP 59-222835 JP 2001-342245 A JP-A-2005-132090

  However, in the conventional image sheet, since the support is a film made of a synthetic resin such as polyester, it is flammable and has a problem in terms of fire prevention and flame prevention.

  It is conceivable to use a glass plate as a support for this problem. However, when a glass plate is used, the glass plate is not flexible, and the glass plate may be damaged.

The present invention has been made in view of the above problems, it is excellent in incombustibility, and an object thereof is to provide an image sheet for both handling easy transmitted and reflected light.

An image sheet according to the present invention includes a base layer composed of a translucent sheet-like body, a first image layer composed of a first image formed on one surface of the base layer, and the other of the base layer. A second image layer made of a second image formed on the surface, and the base layer is a warp yarn made of glass yarn made of 10 to 40 TEX by bundling a plurality of single fibers of 4 to 9 μm in diameter made of glass and used as a weft, made of glass cloth having a density 50 to 70 present / 25mm and then weft density 50 to 70 present / 25mm and to a plain weave light permeability and light diffusing properties of the warp.

  The glass yarn is 22.5 TEX using a plurality of single fibers having a diameter of 7 μm.

  The glass cloth is impregnated with urethane resin.

According to the present invention is excellent in incombustibility, it is possible to provide an image sheet for both handling easy transmitted and reflected light.

[First Embodiment]
FIG. 1 is a cross-sectional view showing a part of an image sheet 1 according to the first embodiment of the present invention, and FIG. 2 is a view for explaining a method for manufacturing a base layer 11.

  In FIG. 1, the image sheet 1 includes a base layer 11, a first image layer 12, and a second image layer 13.

  The base layer 11 is a support made of a translucent sheet-like body, and is a light-transmitting and light-diffusing glass plain-woven using a glass yarn in which a plurality of single fibers made of glass are bundled as warp and weft. It consists of a cross. Here, the light transmission property is sufficient if the illumination light from the second image layer 13 side is transmitted with practical efficiency and the observer can observe the image with sufficient brightness. . The light diffusibility is such that the illumination light is appropriately diffused inside the base layer 11 so that the light source of the illumination light is not seen through, and the surface of the base layer 11 has a uniform brightness. I just need it.

  The thickness of the base layer 11 is about several tens of microns to several hundreds of microns, for example, about 100 microns. Since the light transmittance decreases as the base layer 11 becomes thicker, it is preferable to set the thickness so that the illumination light from the back surface is sufficiently transmitted and has an appropriate light diffusion property.

  Since the base layer 11 is made of glass yarn, it is translucent like frosted glass, is milky white, and the other side cannot be seen through. That is, the base layer 11 functions as a conventional milky white layer and a light diffusion layer. In this respect, it is different from the conventional opaque cloth made of glass fiber. The vertical and horizontal sizes of the base layer 11 can be various sizes depending on the use or purpose of use of the image sheet 1. A method for manufacturing the base layer 11 will be described in detail later.

  The 1st image layer 12 consists of a 1st image formed in one surface of the base layer 11 which is a support body. The first image layer 12 can be formed by various methods. For example, the first image is printed using opaque ink by an inkjet printer. Alternatively, printing is performed using toner with an electrophotographic printer. Alternatively, a photographic emulsion layer is formed in advance, and the first image is exposed and developed. The first image layer 12 can be a monochrome image or a color image.

  The second image layer 13 is formed in the same manner as the first image layer 12. The second image layer 13 and the first image layer 12 may be printed at the same position by the same image data so that the positions of the images overlap each other.

  For example, the first image layer 12 is printed on the surface of the base layer 11 using the image data by a printer, the base layer 11 is turned upside down, and the position is returned to the original position (initial position). The second image layer 13 may be printed by feeding the base layer 11 and inverting the same image data.

  Further, a protective layer may be formed on the surfaces of the first image layer 12 and the second image layer 13 by appropriate resin coating or the like.

  In the image sheet 1 configured as described above, light for illumination incident from the back side (light from the direction of the arrow M2) can be transmitted, and light is appropriately diffused and transmitted in the base layer 11, An image in which the second image layer 13 and the first image layer 12 are overlapped by the transmitted illumination light is displayed brightly and clearly on the front side.

  Further, natural light or illumination light (light from the direction of the arrow M1) incident from the front side can be reflected by the surface of the base layer 11, and the image of the first image layer 12 is reflected by the reflected light. It is displayed brightly and clearly on the front side.

  That is, the base layer 11 functions like a milky white layer and a light diffusion layer, so that the image by the first image layer 12 and the second image layer 13 is clearly displayed by both reflected light and transmitted light. The

  The image density of the first image layer 12 and the second image layer 13 is set so that the image can be seen as clearly as possible according to the intensity of illumination light, the intensity of natural light, the use environment, the purpose of use, and the like. Adjust it.

  As described above, according to the image sheet 1 of the first embodiment, since the base layer 11 is made of glass cloth formed by weaving glass yarn, it is nonflammable and the image sheet 1 as a whole is also nonflammable. . Or it is a flame retardance and is excellent in at least a nonflammability and a flame retardance.

  Further, since the base layer 11 is made of a glass cloth, the stretchability is extremely low, and the image is hardly distorted due to a tension applied for attaching the image sheet 1 or a temperature change caused by sunlight. In addition, the entire base layer 11 has appropriate flexibility, is lightweight, and is not damaged like a glass plate, so that it is easy to handle. Suitable for winding with rollers. The base layer 11 has good flatness, no wrinkles, no ticks even at low temperatures, and good image reproducibility.

  Next, a method for manufacturing the base layer 11 will be described.

  As shown in FIG. 2A, a single fiber having a diameter of 4 to 9 μm is used as the single fiber TS constituting the glass yarn.

  Then, a plurality of such single fibers TS are used, and a glass yarn GY of 10 to 40 TEX (count) is used as shown in FIG. That is, although it is based on the thickness, about 100-400 single fiber TS is used as glass yarn GY. TEX (count) indicates the weight per 1 km of length.

  Specifically, for example, 200 single fibers TS having a diameter of 7 μm are used to form a 22.5 TEX glass yarn GY. In another specific example, 200 single fibers TS having a diameter of 9 μm are used to form a 33.7 TEX glass yarn GY. In still another specific example, 400 single fibers TS having a diameter of 6 μm are used to form a 33.7 TEX glass yarn GY. In still another specific example, 400 single fibers TS having a diameter of 5 μm are used to form a 22.5 TEX glass yarn GY. In addition, various combinations of the thickness, number, and TEX of the single fiber TS are possible.

  The cross-sectional shape of the glass yarn GY is initially circular or elliptical, but becomes flat due to the pressure applied by weaving later. In addition, when bundling a plurality of single fibers TS as the glass yarn GY, it is preferable to impregnate starch-based glue as a binder.

  In the step of manufacturing the glass yarn GY, for example, the molten glass is spun while being drawn out from a large number of holes. This gives a cake. Winding up the wound cake while applying a constant twist to obtain a glass yarn GY. Bulky processing (bulky processing) is performed as necessary.

  Then, the glass yarn GY is used as a raw yarn, and as shown in FIGS. 2C and 2D, a plain cloth (Plain) is used as a glass cloth GC which is a woven fabric. In the plain weave, as shown in FIG. 2D, the warp and the weft are interlaced one by one. Normally, it should not be open and dense. However, it can be somewhat open. As the warp, the glass yarn GY has a density of 50 to 70 pieces / 25 mm, and as the weft, the density of 50 to 70 pieces / 25 mm. Specifically, for example, the density of warps is 60/25 mm and the density of weft is 57/25 mm.

  After making into a woven fabric by plain weaving, it is impregnated with urethane resin and hardened so that the yarn does not slip. In that case, the urethane resin penetrates into the gaps between the eyes of the plain woven fabric. In addition, in order to make the whole glass cloth GC into a slightly blackish gray, black ink may be mixed into the urethane resin.

  In this manner, a non-combustible image sheet can be manufactured in place of a conventional polyester image film by plain weaving using glass yarn GY to form glass cloth GC. By using a dense plain weave, uniform light diffusibility can be obtained without noticeable yarn. However, as long as appropriate light transmission and light diffusibility can be obtained, other weaves may be used instead of plain weaves.

By the way, in order to form the first image layer 12 and the second image layer 13, necessary layers are formed on the front surface and the back surface of the base layer 11. For such a layer, the description of other embodiments described later may be referred to.
[Second Embodiment]
Next, a second embodiment according to the present invention will be described. In the second embodiment, an image printing sheet 3 used for printing an image will be described.

  FIG. 3 is a sectional view showing a part of the image printing sheet 3 of the second embodiment according to the present invention.

  In FIG. 3, the image printing sheet 3 includes a sheet-like body 21, an undercoat resin layer 22, and a resin layer 23.

  The sheet-like body 21 is made of the same glass cloth GC as the base layer 11 described above. That is, it is a semi-transparent one that is plain-woven using a glass yarn GY in which a plurality of single fibers TS made of glass are bundled as warp and weft.

Specific examples of the sheet product 21, the thickness of the glass cloth GC 0.09 mm, mass 105 g / m ^2, yarn count is 22.5TEX × 22.5TEX, density vertical sixty / 25 mm × horizontal 57 present / 25mm. Apply urethane resin with mass 5g / m ² or less (solid). As a result, the total mass of the sheet-like body 21 is about 110 g / m ² . In addition to this, those described in the first embodiment can also be used.

The undercoat resin layer 22 is formed by coating the surface of the sheet-like body 21 with a transparent acrylic resin. As the acrylic resin, for example, an acrylic vinyl chloride copolymer resin is used. The mass is about 5 g / m ² (solid) or less. The undercoat resin layer 22 does not contain titanium oxide. The refractive index of acrylic resin is 1.494, which is close to 1.51 of glass.

The resin layer 23 is formed by coating the surface of the sheet-like body 21 with an acrylic resin containing an inorganic filler such as titanium oxide (TiO ₂ ). As the acrylic resin, for example, an acrylic vinyl chloride copolymer resin is used. The mass is about 10 g / m ² (solid) or less. The composition is, for example, 79% by mass of acrylic vinyl chloride copolymer resin and 21% by mass of inorganic filler (titanium oxide). The surface of the resin layer 23 becomes white and the ink paste for printing becomes good.

Using the image printing sheet 3, an image is printed on the surface of the resin layer 23 using an ink jet printer. An image layer is formed by printing the image. The density of the image layer is set to an appropriate density. By illuminating the illumination light from the back surface, the illumination light is appropriately diffused and transmitted through the sheet-like body 21, and an image is displayed brightly and clearly by the transmitted illumination light. The image printing sheet 3 is nonflammable.
[Third Embodiment]
Next, a third embodiment according to the present invention will be described. In contrast to the image printing sheet 3 of the second embodiment in which the resin layer 23 is provided on one side, the resin layers 22 and 24 are provided on both sides in the third embodiment.

  FIG. 4 is a sectional view showing a part of an image printing sheet 3B according to the third embodiment of the present invention.

  As shown in FIG. 4, the image printing sheet 3 </ b> B includes a sheet-like body 21, undercoat resin layers 22 and 24, and resin layers 23 and 25.

That is, the undercoat resin layer 24 and the resin layer 25 that are the same as the undercoat resin layer 22 and the resin layer 23 on the front surface side are provided on the back surface of the image printing sheet 3 of the second embodiment. By printing an image on both surfaces of the resin layers 23 and 25, the image is clearly displayed by both reflected light and transmitted light. The image printing sheet 3B is nonflammable.
[Fourth Embodiment]
Next, a fourth embodiment according to the present invention will be described. In the fourth embodiment, a photographic printing sheet 4 for printing an image will be described.

  FIG. 5 is a sectional view showing a part of a photographic printing sheet 4 according to the fourth embodiment of the present invention.

  As shown in FIG. 5, the photographic printing sheet 4 includes a sheet-like body 31 and a photographic emulsion layer 32.

  The sheet-like body 31 is the same as the sheet-like body 21 of the third embodiment.

  In the photographic emulsion layer 32, an image layer is formed by exposing an image to the photographic emulsion layer 32 for printing, developing and fixing.

  Therefore, by forming an image having an appropriate density on the photographic emulsion layer 32, the image is clearly displayed by reflected light or transmitted light. The photographic printing sheet 4 is nonflammable.

  In addition, after forming an image, you may form the protective layer for protecting an image on the surface.

  In the various embodiments described above, the structure, shape, dimensions, number, material, composition, image content, etc. of the whole or each part can be appropriately changed in accordance with the spirit of the present invention.

It is sectional drawing which shows a part of image sheet of 1st Embodiment which concerns on this invention. It is a figure for demonstrating the manufacturing method of a base layer. It is sectional drawing which shows a part of image printing sheet of 2nd Embodiment which concerns on this invention. It is sectional drawing which shows a part of sheet | seat for image printing of 3rd Embodiment which concerns on this invention. It is sectional drawing which shows a part of photographic printing sheet of 4th Embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image sheet 3, 3B Image printing sheet 4 Photographic printing sheet 11 Base layer 12 1st image layer 13 2nd image layer 21 Sheet-like body 22, 24 Undercoat resin layer 23, 25 Resin layer 31 Sheet-like body 32 Photograph Emulsion layer GC Glass cloth GY Glass yarn TS Monofilament

Claims (5)

A base layer made of a translucent sheet,
A first image layer comprising a first image formed on one surface of the base layer;
A second image layer comprising a second image formed on the other surface of the base layer;
Have
The base layer is made of glass yarn made of 10 to 40 TEX by bundling a plurality of single fibers having a diameter of 4 to 9 μm made of glass as warp and weft . The warp density is 50 to 70/25 mm and the weft density is 50 to 70. as a present / 25mm made of flat woven light permeability and glass cloth having a light diffusing property,
Image sheet for both transmitted light and reflected light, characterized in that. The glass yarn is 22.5 TEX using a plurality of single fibers having a diameter of 7 μm.
Image sheet for both according to claim 1, wherein the transmitted light and reflected light. The glass cloth is impregnated with urethane resin,
Claim 1 or 2 SL placing both image sheet of transmitted light and reflected light. Having a resin layer formed by respectively coating the acrylic resin containing the both sides of the base layer of titanium oxide,
Image sheet for both according to claim 3, wherein the transmitted light and reflected light. An undercoat resin layer formed by coating a transparent acrylic resin on the surface of the base layer is formed between the base layer and each of the resin layers.
Image sheet for both according to claim 4, wherein the transmitted light and reflected light.