JP2011116070A - Image printing sheet and image sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image printing sheet capable of printing an image which can be more appropriately observed according to the state of ambient light. <P>SOLUTION: The image printing sheet includes: a transparent or translucent support layer 11; a first image receiving layer 12 which has glossiness and is formed on one surface of the support layer 11; and a second image receiving layer 13 which is frosted and formed on the other surface of the support layer 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image printing sheet and an image sheet for printing an image by an inkjet printer or the like.

  2. Description of the Related Art Conventionally, image panels of various sizes for advertisements are often attached to a station premises, a room wall of a hotel or department store, or an outer wall of a building.

  Usually, such an image panel is prepared by attaching an image sheet having an image printed on the surface of the image printing sheet by an inkjet printer or the like to an appropriate panel frame. In the case of a reflection type image sheet, an observer can clearly observe an image by reflected light from ambient light such as natural light or illumination light.

  In the case of a transmissive type image sheet, illumination is performed from the back side of the image sheet with a fluorescent lamp, EL (electric luminescence light), LED, or the like, and the observer can observe the image clearly with the transmitted light.

  As an image printing sheet for such an image sheet, conventionally, a sheet-like support provided with a diffusion layer on one surface is used (for example, FIG. 6 of Patent Document 1).

JP 2005-132090 A

  However, when using an image sheet created by printing an image on a conventional image printing sheet, the image cannot always be observed in an optimum state depending on the use environment of the image sheet.

  That is, when the ambient light incident on the image sheet is strong, the light is regularly reflected on the surface of the image sheet, so that the ambient light may be reflected and the image may be difficult to see. For example, when a fluorescent lamp for lighting a room is bright, the fluorescent lamp is reflected on the surface of the image sheet. If the fluorescent light reflected on the image sheet is directly visible to the viewer's eyes, this prevents the viewer from seeing the image normally. In particular, when the surface of the image sheet is glossy, and depending on the positional relationship between the image sheet and the fluorescent lamp, the regular reflection becomes strong, and such inconvenience is likely to occur.

  Also, if the surface of the image sheet is frosted, the vividness of the image is reduced and the image becomes dull and inconspicuous compared to the case where the image sheet has gloss. In particular, when the ambient light is weak, the image may become dull and may not play the role of advertising.

  As described above, the conventional image printing sheet and the image sheet cannot appropriately cope with the intensity of ambient light.

  The present invention has been made in view of such problems, and has an image printing sheet capable of printing an image that can be more appropriately observed according to the state of ambient light, and such an image. An object is to provide an image sheet.

  An image printing sheet according to the present invention is formed on a transparent or translucent support layer, a glossy first image receiving layer formed on one surface of the support layer, and the other surface of the support layer. A matte second image-receiving layer.

  An image sheet according to the present invention is formed on a transparent or translucent support layer, a first image receiving layer having glossiness formed on one surface of the support layer, and the other surface of the support layer. In a state where the matte second image receiving layer, the first image printed on the first image receiving layer, the surface having glossiness, and the same image as the first image layer are reversed and coincide with each other And a second image having a matte surface printed on the second image receiving layer.

  ADVANTAGE OF THE INVENTION According to this invention, the sheet | seat for image printing which can print the image which can be observed more appropriately according to the state of ambient light, and an image sheet can be provided.

It is a figure which shows a section of a sheet for image printing of this embodiment in a section. It is a figure which shows the example of the image sheet printed on the image printing sheet of this embodiment. It is a figure which shows the other example of the image sheet printed on the image printing sheet of this embodiment.

  In FIG. 1, an image printing sheet 1 of the present embodiment includes a transparent or translucent support layer 11, a glossy first image receiving layer 12 formed on one surface of the support layer 11, and a support layer 11. It has a matte second image receiving layer 13 formed on the other surface.

  The support layer 11 is made of a transparent or translucent film. The support layer 11 is formed using a synthetic resin such as polyester, polypropylene, or polyethylene terephthalate (PET), for example. The support layer 11 is preferably a material having less stretchability or a material having heat resistance.

  The first image receiving layer 12 and the second image receiving layer 13 are respectively formed on the front surface or the back surface of the support layer 11 and have permeability to ink. The first image receiving layer 12 and the second image receiving layer 13 are provided by coating, for example. These layers may be formed by spraying. Further, such a layer may be attached to the support layer 11. Moreover, you may spray by spraying on the stuck layer.

  By printing on the surface of the image printing sheet 1 with a known ink jet printer, the ink penetrates into the first image receiving layer 12 or the second image receiving layer 13. The function of the image receiving layer itself is known.

  The first image receiving layer 12 and the second image receiving layer 13 contain titanium white or silica as an inorganic filler in a suitable polymer. The particle size of the inorganic filler contained in the first image receiving layer 12 is finer than the particle size of the inorganic filler contained in the second image receiving layer 13. As the particle diameter becomes finer, the finish of the image receiving layer becomes more glossy. By having gloss, it becomes more glossy and gloss increases. Further, as the particle size becomes coarse, the finish of the image receiving layer becomes a matte tone.

  For example, the smaller the particle size, the smoother the surface and the glossiness increases. When the particle size is large, irregular reflection occurs on the surface and it becomes matt.

  As described above, whether the image is a glossy image-receiving layer or a matte image-receiving layer can be realized, for example, by adjusting the surface roughness.

  This will be described in more detail below.

  As the first image receiving layer 12, one surface (referred to as “A surface”) of the support layer 11 is coated with glossy tone. Thereby, when an image is printed on the first image receiving layer 12 and observed, the color of the image becomes vivid. In other words, vividness increases. This is because there is little irregular reflection by the surface of the support layer 11, and it becomes a state close to regular reflection.

  As the second image receiving layer 13, the other surface (referred to as “B surface”) of the support layer 11 is coated with a matte tone. Thereby, when the image is printed and observed, regular reflection due to ambient light (external light) is prevented, and the image becomes easy to see.

  Thus, in the image printing sheet 1, by forming image receiving layers having different light reflection properties on both the front and back sides, that is, the A side and the B side, depending on the state of the ambient light in which it is used, The printing surface of the image can be selected from either side A or side B. Thereby, it is possible to print an image that can be observed more appropriately according to the state of the ambient light.

  In other words, when used in a place where ambient light is strong and reflection of ambient light (such as a fluorescent lamp) occurs due to regular reflection, printing is performed on the second image receiving layer 13 side. Then, when used in a place where the ambient light is weak or a place where there is no possibility of reflection due to regular reflection of the ambient light, printing is performed on the first image receiving layer 12 side. As a result, when the printed image sheet is actually installed and used in the field, the ambient light is not reflected by specular reflection and the image is not easily seen, and the image is dull because the ambient light is weak. It is possible to prevent it from becoming inconspicuous.

  In coating the first image receiving layer 12 and the second image receiving layer 13, an existing coating material can be used as the coating material.

  For example, it is possible to use an inorganic filler having a large particle size for a matte coating and a material having a small particle size for a glossy coating. Generally speaking, a polymer resin containing an inorganic filler is used for the matte coating. Similar contents can be used for glossy coatings. A wide variety of materials such as silica and titanium white can be used as the inorganic filler material.

  Further, the thicknesses of the first image receiving layer 12 and the second image receiving layer 13 can be variously adjusted.

  That is, the matte-like coating layer can be made thinner and the glossy-like coating layer can be made thicker. Further, the matte coating layer can be thickened and the glossy coating layer can be thinned.

  That is, (a) the second image receiving layer 13 is made thinner and the first image receiving layer 12 is made thicker, (b) the second image receiving layer 13 is made thicker and the first image receiving layer 12 is made thinner, Two types of image printing sheets 1 can be prepared in advance. Further, it is possible to create more types of image printing sheets 1 by making the thicknesses different.

  It is also possible for the matte coating layer and the glossy coating layer to have the same thickness. In that case, it is possible to adjust the thicknesses of both layers.

  In this way, by preparing different image printing sheets 1 for the thicknesses of the first image receiving layer 12 and the second image receiving layer 13, from among these types at the time of image printing, It is possible to select an appropriate image printing sheet 1.

  In addition, the amount of ink permeated by the ink jet printer, that is, the image density changes due to the change in the thickness of the coating layers on the A and B surfaces. As a result of this phenomenon, there are the following advantages.

  That is, when the ambient light is strong, the image printed on the thick side of the coated layer is observed with reflected light. When the outside light is weak, the image printed on the thin side of the coated layer is observed with reflected light.

  Further, when the image printed on the image printing sheet 1 is observed with transmitted light, in order to prevent difficulty in viewing the image due to obstacles due to regular reflection or irregular reflection of ambient light, the A side (glossy surface) and the B side ( (Matte surface) can be used properly.

  This not only makes it difficult to see, but also reduces the contrast of the printed image even when the contrast of the image data on the computer is the same when printing on the thin side of the coating layer or the thick side of the coating layer. Can be different. For example, the thin surface of the coating layer becomes flat and the coating layer is thick, so that a material with a deep ink penetration has a natural contrast.

  Therefore, when a sheet for image printing having a thin surface of the coating layer and a thin surface of the coating layer is prepared and the same image is printed on both surfaces, when the image is observed with transmitted light, Different densities are added, and an appropriate density can be obtained.

  By the way, when the same image is printed on both sides of an image printing sheet having the same thickness of the coating layer on the front and back, when the image is observed with transmitted light, it is compared with the case where it is printed only on one side. Doubles the image density. In this case, when observed with transmitted light, the image density may be higher than when observed with reflected light, and the contrast may become too high.

  Therefore, a display image based on the image data is printed on the image receiving sheet 1 on the first image receiving layer 12 side as shown in FIG. 2A, for example. Alternatively, as shown in FIG. 2B, printing is performed on the second image receiving layer 13 side.

  Thereby, the ink penetrates into the image receiving layer. The soaked ink diffuses according to the amount and the nature of the layer. Thereby, an image sheet 1SA having an image (display image) GZA formed on the first image receiving layer 12 is created. Also, an image sheet 1SB in which an image (display image) GZB is formed on the second image receiving layer 13 is created.

  Further, as shown in FIG. 3, a display image based on the image data is printed on both the first image receiving layer 12 side and the second image receiving layer 13 side on the image printing sheet 1. At that time, the image GZA to be printed on the first image receiving layer 12 and the image GZB to be printed on the second image receiving layer 13 are printed in a state in which the same image is reversed and the front and back coincide with each other.

  As a result, the image having the glossy surface (first image) GZA and the image having the matte surface (second image) GZB in a state where the same image as the image GZA is inverted and coincides with the front and back. A sheet 1S is created.

  According to such an image sheet 1S, the observer can see a clear image having the same density regardless of whether it is reflected light or transmitted light.

  When creating the image sheet 1S, that is, when printing an image on the image printing sheet 1, it is selected whether the image (first image) GZA or the image (second image) GZB is the front side. be able to.

  That is, normally, the first image receiving layer 12 side, that is, the image (first image) GZA is set to the front side, and the second image receiving layer 13 side, that is, the image (second image) GZB is set to the back side. Thereby, an observer can see a glossy and beautiful image regardless of whether the reflected light or the transmitted light is used.

  On the other hand, in the case where the environment light at the place where the image sheet 1S is attached is strong and the environment light (fluorescent lamp or the like) is reflected by the regular reflection, the second image receiving layer 13 side, that is, the image ( The second image) GZB is the front side, and the first image receiving layer 12 side, that is, the image (first image) GZA is the back side. Thus, regardless of whether the reflected light or the transmitted light is used, the ambient light is not reflected by the regular reflection and the image is not easily seen, and the observer can see a beautiful image.

  Furthermore, when selecting which of the image (first image) GZA or the image (second image) GZB is the front side, the thicknesses of the first image receiving layer 12 and the second image receiving layer 13 are selected. An appropriate image printing sheet 1 can be selected from the different image printing sheets 1, that is, the image printing sheets 1 described in (a) and (b) above.

  That is, for example, the image printing sheet 1 having a thicker first image receiving layer 12 is selected, and the first image receiving layer 12 side is set to the front side. Further, the image printing sheet 1 having the thinner first image receiving layer 12 is selected, and the first image receiving layer 12 side is set to the front side. On the contrary, the image printing sheet 1 having a thicker second image receiving layer 13 is selected, and the second image receiving layer 13 side is set to the front side. Further, the image printing sheet 1 having a thinner second image receiving layer 13 is selected, and the second image receiving layer 13 side is set to the front side.

Eventually, the following four types of image sheets 1S can be created as the image sheets 1S.
(1) An image (first image) GZA printed on the thick first image receiving layer 12 on the front side (2) An image (first image) GZA printed on the thin first image receiving layer 12 (3) An image printed on the thick second image receiving layer 13 (second image) GZB on the front side (4) An image printed on the thin second image receiving layer 13 (second image) Image) GZB with front side Also, the image printing sheet 1 having the same thickness of the first image receiving layer 12 and the second image receiving layer 13 can be selected.

  Any one of these image sheets 1S can be created by selecting the image printing sheet 1 and the front and back. Thereby, an easy-to-view image corresponding to various reflections by ambient light can be obtained. Moreover, when observing with either reflected light or transmitted light, it is possible to observe at an appropriate concentration.

  When the image printing sheet 1 having the same layer thickness of the first image receiving layer 12 and the second image receiving layer 13 is used, the same image data is used on one surface thereof by an inkjet printer, Printing may be performed a plurality of times, for example, twice.

  A pigment ink is preferably used as the ink. As the contents of the image, color or monochrome photographs, illustrations, line drawings, characters and the like may be used, and various contents may be formed according to the purpose of use of the printed image sheet 1S. In addition, the front and back sides may be set so that a normal image is seen from the front side.

  A protective layer may be formed on the surface after printing. The protective layer may be formed by an appropriate resin coating, or may be formed by attaching a transparent or translucent film coated with a photocatalyst. When a protective layer having ink permeability is used, a protective layer can be formed on the image printing sheet before printing.

  Note that the ink density (image density) and the number of times of printing at the time of printing by the ink jet printer may be adjusted so that the printed image looks as clear as possible according to the intensity of the ambient light or the purpose of use.

  In the embodiment described above, the structure, shape, size, number, material of the whole or each part of the support layer 11, the first image receiving layer 12, the second image receiving layer 13, the image printing sheet 1, or the image sheet 1S. The composition, the content of the image, and the like can be changed as appropriate within the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Image printing sheet 11 Support layer 12 1st image receiving layer 13 2nd image receiving layer GZA, GZB Image 1S, 1SA, 1SB Image sheet

Claims (4)

A transparent or translucent support layer,
A glossy first image-receiving layer formed on one surface of the support layer;
A matte second image-receiving layer formed on the other surface of the support layer;
An image-printing sheet comprising: The first image receiving layer and the second image receiving layer contain titanium white or silica as an inorganic filler, and the inorganic filler contained in the first image receiving layer has a particle size of the second image receiving layer. Finer than the particle size of the inorganic filler contained in the image receiving layer of
The image printing sheet according to claim 1. The thickness of the first image receiving layer and the thickness of the second image receiving layer are different from each other;
The image printing sheet according to claim 1 or 2. A transparent or translucent support layer,
A glossy first image-receiving layer formed on one surface of the support layer;
A matte second image-receiving layer formed on the other surface of the support layer;
A first image printed on the first image-receiving layer and having a glossy surface;
A second image having a matte surface printed on the second image receiving layer in a state where the same image as the first image layer is inverted and is in a state of being opposite to the front and back;
An image sheet comprising:

Images