JP2010037671A - Nonflammable sheet for image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nonflammable sheet for images, which is improved in strength without declining in reliability on its own nonflammability. <P>SOLUTION: The nonflammable sheet is such that glass yarns GY made by bundling a plurality of glass filaments and resin fibers JY made from a polyester resin are woven together; wherein the count ratio of the resin fibers JY to the glass yarns GY is 1/5 to 1/100, and the glass yarns GY and the resin fibers JY are used as warps and wefts respectively, being woven together by plain weave. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a non-combustible image sheet used for outdoor advertising and the like.

  Traditionally, image panels of various sizes for advertising purposes are often attached to station premises, building walls or rooftops, and outdoor structures. 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).

  However, in these conventional image sheets, 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.

  In response to this problem, the present applicant has developed an image sheet using a light-transmitting and light-diffusing glass cloth that is plain-woven using a glass yarn in which a plurality of single fibers made of glass are bundled as warp and weft. Previously proposed (Patent Document 4).

According to the image sheet of Patent Document 4, since the glass cloth is used as the base layer, it becomes nonflammable, and the problems regarding fire prevention and fire prevention are solved.
JP 59-222835 JP 2001-342245 A JP-A-2005-132090 JP2007-203724

  However, in Patent Document 4 described above, since glass cloth is used as a base layer, there is a weak surface. That is, when the image sheet is used outdoors, the glass yarn is subjected to wind pressure, so that a very large tension acts on the glass yarn. In addition, since the image sheet flutters when the direction of the wind changes, the bending force repeatedly acts on the glass yarn, which may cause breakage of the glass yarn.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a non-combustible image sheet having improved strength without lowering the reliability of non-combustibility.

  The nonflammable image sheet according to the present invention is woven using a glass yarn in which a plurality of single fibers made of glass are bundled and a resin fiber made of a polyester resin, and the number of the resin fibers relative to the glass yarn. Is used at a ratio of 1/5 to 1/100.

  Preferably, the glass yarn and the resin fiber are used as warp and weft, respectively, and are woven by plain weaving.

  In order to increase durability, both surfaces may be coated with a vinyl chloride resin.

  According to the present invention, it is possible to provide a nonflammable image sheet having improved strength without lowering the reliability of nonflammability.

  1 is a front view showing an overall appearance of an image sheet 3 according to an embodiment of the present invention, FIG. 2 is an enlarged view showing a part of the image sheet 3, and FIG. 3 is an image sheet of FIG. FIG. 4 is a cross-sectional view of the image sheet 3, and FIG. 5 is a diagram for explaining a method for manufacturing the image sheet 3.

  1, the image sheet 3 includes a sheet-like body 11 and attachment portions 12, 12, 12,... Attached to the periphery of the sheet-like body 11.

  2 and 3, sheet-like body 11 is woven using glass yarn GY in which a plurality of single fibers made of glass are bundled and resin fibers JY made of polyester resin. The number of resin fibers JY is significantly smaller than the number of glass yarns GY. That is, the ratio of the number of resin fibers JY to the glass yarn GY is about 1/5 to 1/100. Specifically, for example, 1/5, 1/20, 1/30, 1/30, 1/50, 1/70, 1/100, and the like. That is, one resin fiber JY is used for 5 to 100 glass yarns GY.

  Further, the glass yarn GY and the resin fiber JY are used as warp yarns GYT and JYT and weft yarns GYY and JYY, respectively, and are woven by plain weaving. That is, the warp yarn YYT and the weft yarn GYY of the glass yarn GY and the warp yarn JYT and the weft yarn JYY of the resin fiber JY are interwoven. As shown in FIG. 4, image receiving layers 21 are formed on both surfaces of the sheet-like body 11 so that ink from an ink jet printer is well placed thereon.

  The sheet-like body 11 is translucent having light transmission and light diffusibility. As the glass cloth, for example, a plurality of single fibers having a diameter of 4 to 9 μm, for example, a single fiber having a diameter of 4 μm or a diameter of 9 μm are used to form a glass yarn GY of 10 to 40 TEX, and these are used as warp yarns GYT and weft yarns GYY.

  For the resin fibers JY, for example, a plurality of single fibers having an appropriate diameter are used to form 10 to 40 TEX resin fibers (resin yarns) JY, which are used as warp yarns YYT and weft yarns JYY. Alternatively, for example, a single fiber having an appropriate diameter is used as it is as a 10 to 40 TEX resin fiber JY.

  Here, it is sufficient that the light transmittance is such that the illumination light from the outside can pass through the sheet-like body 11 with practical efficiency and the observer can observe the image with sufficient brightness. Further, the light diffusibility is that the illumination light is appropriately diffused inside the sheet-like body 11 so that the light source of the illumination light is not seen through, and the surface of the sheet-like body 11 has a uniform brightness. Any degree is acceptable.

  The thickness of the sheet-like body 11 is about several tens of microns to several hundreds of microns, or up to about 1000 microns, for example, about 400 to 500 microns. Since the light transmittance decreases as the sheet-like body 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.

  The sheet-like body 11 is translucent like frosted glass, is milky white, and the other side cannot be seen through. That is, the sheet-like body 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 sheet-like body 11 can be various sizes depending on the use or purpose of use of the image sheet 3. For example, the length is about 1 to 5 m and the width is about 1 to 10 m. Specifically, for example, the length is about 3 m and the width is about 5 m. The manufacturing method of the sheet-like body 11 will be described in detail later.

  The image receiving layer 21 is formed by coating with various materials. For example, antimony trioxide as a flameproofing agent, titanium oxide as a white pigment, silica as a light diffusing material, etc. are mixed with an appropriate binder resin and coated to an appropriate thickness. Also, a vinyl chloride resin is coated. Alternatively, an adhesive may be applied to the surface, and a release film for peeling may be attached thereon.

  The attachment portion 12 has a loop shape, and is attached to the periphery of the sheet-like body 11 as described above. The attachment part 12 is attached to the periphery of the sheet-like body 11 at an interval of 5 to 20 cm, for example. When attaching the image sheet 3, a rope or wire is passed through the attachment portion 12, and the rope or wire is bound and fixed to a building or a fixture. The image sheet 3 is preferably tensioned so as not to bend by pulling a rope or a wire.

  In addition, the peripheral part of the sheet-like body 11 is bent several times, thereby obtaining strength. The attachment part 12 is attached to the bent part.

  In FIG. 5A, a single fiber having a diameter of about 4 to 9 μm is used as the single fiber TS constituting the glass yarn GY.

  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.

  When a single fiber TS having a slightly thin diameter of 3 μm is used, the strength of the glass cloth GC can be increased, but it is not preferable because it may enter into the blood vessel as in the case of asbestos.

  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 a glass yarn GY, a starch-based paste may be impregnated as a binder.

  Also, the resin fiber JY can be manufactured in the same manner as the glass yarn GY. As described above, a polyester resin is used as the material for the resin fiber JY. Specifically, for example, polyethylene terephthalate (PET) that is strong, hardly stretched, and resistant to heat is used.

  Such glass yarn GY and resin fiber JY are used as raw yarns, and as shown in FIGS. 5C and 5D, a plain cloth (Plain) is used as a glass cloth GC which is a woven fabric. In the plain weave, as shown in FIG. 5D, 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 or the resin fiber JY has a density of 50 to 70 pieces / 25 mm, and the weft has a 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 forming a woven fabric by plain weaving, the image receiving layer 21 is formed by coating various resins and the like as described above. In this coating, after application, the surface may be squeezed using a spatula knife or the like to finish the surface smoothly. Further, coating may be performed using a rotary cylinder such as gravure printing.

  By coating, the binder resin penetrates into the gaps between the eyes of the plain woven fabric. That is, as shown in FIG. 4, a large amount of the binder resin is applied to the valley portion of the fabric, and a part of the binder resin is thinly applied to the mountain portion of the fabric.

  Thus, the non-combustible image sheet 3 can be manufactured by plain weaving using the glass yarn GY and the resin fiber JY to form the glass cloth GC. By using a dense plain weave, uniform light diffusibility can be obtained without noticeable yarn. Further, as long as appropriate light transmittance and light diffusibility are obtained, other weaves may be used instead of plain weaves.

  In the present embodiment, in order to increase the strength of the glass fiber (glass yarn), the polyester fiber is interwoven as described above. However, in the present embodiment, the ratio of the glass fiber to the polyester fiber in each of the vertical and horizontal directions is determined by experimentally obtaining the greatest common divisor for both the non-flammability of the glass fiber and the strength increase by the polyester fiber. For example, the flammability increases when the polyester fiber is increased to 1 or more with respect to the glass fiber 5, and the strength decreases when the ratio of the polyester fiber is decreased.

  Therefore, when manufacturing with a focus on strength against tensile wind pressure, the limit of the ratio is set so that the polyester fiber is not 1 or more with respect to the glass fiber 5 and the nonflammability is focused on. When manufacturing, the glass fiber should not be less than 5 with respect to the polyester fiber 1.

  According to the image sheet 3 described above, most of it is made of glass yarn GY and is nonflammable. Since the resin fibers JY are woven in a small proportion, the strength is improved. For example, when the image sheet 3 flutters due to strong wind or the like during use, the bending force repeatedly acts on the resin fiber JY together with the glass yarn GY, but the strength is improved due to the presence of the resin fiber JY and it is torn. It is difficult and difficult to break. Even when the resin fiber JY burns due to a fire or the like, only a part of the image sheet 3 burns, and is nonflammable as a whole.

  Thus, since the image sheet 3 is constituted by the union of the glass yarn GY and the resin fiber JY, the nonflammability is maintained and the strength is improved.

  In the embodiment described above, the structure, configuration, shape, size, number, material, composition, 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 one Embodiment which concerns on this invention. It is a figure which expands and shows a part of image sheet. FIG. 3 is a perspective view showing the image sheet of FIG. 2 further enlarged. It is sectional drawing of the sheet | seat for images. It is a figure for demonstrating the manufacturing method of the sheet | seat for images.

Explanation of symbols

3 Image sheet 11 Sheet-like body 12 Mounting portion 21 Image receiving layer GC Glass cloth GY Glass yarn JY Resin fibers GYT, JYT Warp yarn GYY, JYY Weft

Claims (3)

It is woven using a glass yarn made by bundling a plurality of single fibers made of glass and a resin fiber made of polyester resin,
The ratio of the number of the resin fibers to the glass yarn is used at a low ratio of 1/5 to 1/100,
Non-combustible image sheet characterized by the above. The glass yarn and the resin fiber are used as warp and weft, respectively, and are woven by plain weaving,
The nonflammable image sheet according to claim 1. PVC resin is coated on both sides,
The nonflammable image sheet according to claim 2.

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