JP2017040010A - Fabric for indoor lighting panel and indoor lighting panel using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fabric for an indoor lighting panel, which is light in weight and excellent in transportability, causes no chalk mark or wrinkle, and can be folded and easily attached or detached.SOLUTION: Warp and weft that compose a fabric are made of multifilament yarn. The warp has 30D (denier) to 75D of thickness, 36 lines or more of filament count, and 140 lines/inch to 180 lines/inch of density. The weft has 30D (denier) to 75D of thickness, 48 lines or more of filament count, and 110 lines/inch to 130 lines/inch of density.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fabric for internally illuminated panels and an internally illuminated panel using the same.

  Interior lighting panels have a lighting function as well as an advertising function, and have recently been widely installed in department stores, underground shopping centers, station buildings, and the like. An acrylic resin plate was widely used as an image display member for an internally-illuminated panel at first, but the acrylic resin plate is heavy and labor is required for transportation, and its installation was performed by a specialist. Further, the acrylic resin plate has an essential problem that it is easily broken.

  For this reason, cloth (for example, tarpaulin) in which fibers are coated with a soft vinyl chloride resin has been used as an image display member of an internally lit panel. In addition, various other internally-illuminated panel fabrics have been proposed (for example, Patent Documents 1 to 4).

JP 2007-148375 A JP-A-7-198946 JP 2013-140706 A JP 2007-78963 A

  However, although the proposed internally-illuminated panel fabric is lighter than conventional acrylic resin plates, further weight reduction is desired from the market. Further, in the proposed internally lit panel fabric, since a resin film and an ink receiving layer are formed on the surface of the fabric, whitening scratches (chalk marks) and wrinkles are generated when the fabric is bent, and this portion is a light-shaded shading shadow. As a result, the image quality may be degraded.

  Therefore, the present invention has been made in view of such a conventional problem, and its purpose is lightweight, it can be folded without generating chalk marks and wrinkles, has excellent transportability, and is easily detachable. The object is to provide a fabric for an illuminated panel.

  The fabric for an internally illuminated panel according to the present invention that achieves the above object is a fabric on which an image is printed on the internally illuminated panel, wherein the warp and the weft constituting the fabric are multifilament yarns, Is in the range of 30D (denier) to 75D, the filament count is 36 or more, the density is in the range of 140 / inch to 180 / inch, the weft is in the range of 30D to 75D in thickness, and the filament count is 48 As described above, the density is in the range of 110 / inch to 130 / inch.

  Here, it is preferable that the warp and the weft are polyester multifilament yarns.

  The single filament fineness of the multifilament yarn is preferably in the range of 0.29 to 1.67 dtex.

  Further, according to the present invention, a housing having an opening, a light source disposed in the housing, and a fabric as a display surface that seals the opening and transmits light from the light source outward. There is provided an internal illumination type panel characterized by using any one of the above-mentioned fabrics as the fabric.

  The fabric for internally illuminated panels of the present invention can be folded without producing chalk marks or wrinkles, has excellent transportability, is lightweight, and can be easily attached and detached.

It is a side conceptual diagram of one embodiment showing composition of an internal illumination type panel concerning the present invention.

  The warp and weft constituting the fabric for internally illuminated panel according to the present invention (hereinafter sometimes simply referred to as “fabric”) are made of multifilament yarn. Examples of the multifilament yarn used in the present invention include polyesters such as polyethylene terephthalate, polypropylene terephthalate, and polybutylene terephthalate, cationic dyeable polyester fibers, polyamide fibers such as nylon 6 and nylon 66, and synthetic fibers such as polyacryl. preferable. Among these, polyester-based synthetic fibers are more preferable because of less heat shrinkage. The single yarn cross section is not limited to a round shape, and may be a different shape such as a Y shape, an L shape, or a hollow shape.

  The thickness of the warp which consists of the multifilament yarn which comprises the fabric which concerns on this invention is the range of 30D-75D. When the warp thickness is less than 30D, there is a problem that the durability of the fabric is lowered. On the other hand, when the warp thickness exceeds 75D, the fabric becomes thick and heavy, and there is a possibility that wrinkles may occur due to folding. A more preferred warp thickness is in the range of 50D to 75D.

  The filament count of the warp is 36 or more in the above range. If the filament count of the warp is less than 36, there is a possibility that chalk marks or wrinkles may occur due to folding. The upper limit of the warp filament count is preferably 72 in actual use.

  The density of the warp is in the range of 140 / inch to 180 / inch. When the density is less than 140 lines / inch, the image printing quality and color density are lowered. On the other hand, when the density exceeds 180 lines / inch, the light transmittance decreases.

  The weft made of the multifilament yarn constituting the fabric according to the present invention has a thickness in the range of 30D to 75D. When the weft thickness is less than 30D, there is a problem that the durability of the fabric is lowered. On the other hand, when the weft thickness exceeds 75D, there is a possibility that chalk marks or wrinkles may be generated by folding. A more preferred weft thickness is in the range of 50D to 75D.

  The filament count of the weft yarn is 48 or more in the above-mentioned range. When the filament count of the weft is less than 48, there is a possibility that chalk marks or wrinkles may be generated by folding. The upper limit of the weft filament count is preferably 72 in actual use.

  The weft density is in the range of 110 / inch to 130 / inch. When the density is less than 110 lines / inch, the image printing quality and the color density are lowered. On the other hand, when the density exceeds 130 / inch, the light transmittance decreases.

  Further, the multifilament yarn constituting the warp and weft used in the present invention is preferably composed of ultrafine filaments having a single yarn fineness of 0.29 dtex to 1.67 dtex. When the single yarn fineness is less than 0.29 dtex, it is difficult to spin the filament. On the other hand, when the single yarn fineness exceeds 1.67 dtex, there is a possibility that chalk marks or wrinkles may occur due to folding.

  There is no particular limitation on the weaving of the fabric, and conventionally known weaving such as twill, satin weave, and plain weave can be adopted, but twill and satin weave are preferred, and more preferred. Is twill.

  For the image formation on the fabric according to the present invention, a conventionally known image forming method can be used, but it is recommended to use a sublimation transfer printing method because a high-quality image can be obtained. In the sublimation transfer printing method, an image formed on a sublimation transfer sheet is printed by printing a reversal image with a sublimation ink on a sublimation transfer sheet, and then subjecting the sublimation transfer sheet and fabric to contact and heat treatment. Is transferred to the fabric using the sublimation property of the sublimation ink.

  In addition, as image forming methods on the sublimation transfer sheet, screen printing, gravure printing, offset printing, and other recording methods can be used. However, these recording methods require plate making, and the time and cost accordingly. Therefore, the ink jet recording method is preferable. The inkjet recording method does not require plate creation, so it has the advantages of cost reduction and creation time reduction compared to printing methods that require a plate, and is also suitable for small lot image formation such as on-demand applications. .

  Next, the internally illuminated panel according to the present invention will be described. FIG. 1 is a schematic cross-sectional view showing an embodiment of an internally illuminated panel according to the present invention. FIG. 1A shows a state before the cloth as a display screen is attached, and FIG. 1B shows a state after the cloth is attached. Note that the internally illuminated panel according to the present invention is not limited to the embodiments described below.

  An internally illuminated panel P shown in FIG. 1 has a rectangular parallelepiped shape and has a housing 1 having an opening 11 on one surface, and a plurality of light sources disposed in the housing so as to face the opening 11. LED (Light Emitting Diode) 2 and a fabric 3 as a display screen on which an image is formed. The fabric according to the present invention is used as the fabric. The plurality of LEDs 2 are arranged in a matrix on a support substrate 21 having substantially the same size as the opening 11.

  A circumferential groove 12 is formed around the opening 11 of the housing 1. On the other hand, a string-like member 4 having a square cross section having elasticity such as rubber is sewn on the periphery of the image forming surface of the fabric 3. Attachment of the fabric 3 to the housing 1 is performed by pushing the string-like member 4 attached to the fabric 3 into the circumferential groove 12 formed in the housing 1. According to such attachment work, any number of persons can easily attach and remove the display screen, which has been conventionally performed by a specialist. The attachment of the string-like member 4 to the fabric 3 is not limited to sewing, and a conventionally known attachment method such as sticking can be used.

  The light source of the internally illuminated panel P is not limited to the LED, and may be a fluorescent tube or a neon tube. Further, the distance between the light source and the fabric is usually about 3 cm to 20 cm. When the distance between the light source and the fabric is short, a light dispersion plate may be provided between the light source and the fabric in order to improve the dispersibility of light incident on the fabric. Further, the light source may be arranged in a side light type in addition to the direct type.

  In addition, when using an internally illuminated panel as an illumination together with an advertisement, a time switch is provided on the internally illuminated panel to supply power to the LED according to the business start time or daylighting time. The power supply may be stopped according to the departure time.

Example 1
A fabric as a twill weaving display screen with a warp density of 180 yarns / inch and a weft density of 130 yarns / inch was produced using a 75D thickness, a filament count of 72, and a semidal polyester filament yarn as warps and wefts. Subsequently, the test image formed by the inkjet recording method was transferred to the produced fabric by the sublimation transfer printing method, and the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Example 2)
A fabric was produced in the same manner as in Example 1 except that the density of the weft was 110 yarns / inch, and the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Example 3)
A fabric was prepared in the same manner as in Example 1 except that a semi-dal polyester filament yarn having a filament count of 36 was used as the warp, and the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

Example 4
Fabrics were prepared in the same manner as in Example 1 except that a semidal polyester filament yarn having a filament count of 36 filaments was used as the warp and a full dull polyester filament yarn was used as the weft, and the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Example 5)
A fabric as in Example 1 except that a semi-dial polyester filament yarn having a thickness of 30D and a filament count of 36 is used as the warp, and a semi-dial polyester filament yarn having a thickness of 30D and a filament count of 48 is used as the weft. And the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Example 6)
Fabrics were prepared in the same manner as in Example 1 except that a polyester filament yarn having a modified cross section was used as the warp and weft, and the warp density was 140 yarns / inch, and the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Comparative Example 1)
Fabrics were prepared in the same manner as in Example 1 except that a semidal polyester filament yarn having a filament count of 36 filaments was used as the warp and weft, and the warp density was 150 yarns / inch, and the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Comparative Example 2)
Example 1 except that a semi-dal polyester filament yarn with a filament count of 36 is used as the warp, a density of warp is 150 yarns / inch, and a full-dal polyester filament yarn with a filament count of 36 is used as the weft. Fabrics were prepared and properties were evaluated by the following methods. The evaluation results are shown in Table 1.

(Comparative Example 3)
Example 1 with the exception of using a semidal polyester filament yarn with a filament count of 36 as the warp, a warp density of 150 yarns / inch, and a polyester filament yarn with a modified cross-section semidal with a filament count of 36 as the weft. Fabrics were produced in the same manner, and the characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Comparative Example 4)
The semifilar polyester filament yarn with a filament count of 36 is used as the warp, the density of the warp is 280 / inch, the thickness of the weft is 150D, and the semifilal polyester filament yarn with a filament count of 48 is used. Fabrics were produced in the same manner as in Example 1 except that the number was 90 / inch and satin was used, and characteristics were evaluated by the following methods. The evaluation results are shown in Table 1.

(Image quality)
The printed fabric was placed on a flat table, and it was visually judged according to the following criteria whether the clearness of photographs and pictures, small letters, etc. were clearly visible.
A: Vividness of photographs and pictures and appearance of letters are very good.
○: The clearness of photographs and pictures, or the appearance of characters is inferior to ◎.
Δ: The clearness of photographs and pictures and the appearance of letters are both inferior to ◎.

(Color density during light irradiation)
A printed fabric is placed on an A4 size LED light table (trace stand), and light is irradiated from below. Then, whether or not the printed color (particularly black portion) was changed or thinned was visually determined according to the following criteria.
A: The printed color looks darker.
○: The printed color appears as it is.
Δ: The printed color is slightly lighter.
X: The printed color has changed whitish.

(Translucency)
A printed fabric is placed on an A4 size LED light table (trace stand), and light is irradiated from below. Then, it was visually determined according to the following criteria whether or not it was bright as a whole, and whether the contrast was clear between the dark and light portions of the print.
A: Bright overall and clear contrast.
○: Overall brightness or contrast is inferior to ◎.
Δ: Both overall brightness and contrast are inferior to ◎.

(Difficulty of wrinkles)
The printed fabric was squeezed by hand and then released, and whether or not wrinkles occurred was visually determined according to the following criteria.
A: Almost no wrinkle.
○: Slightly hazy.
Δ: It is considerably hazy.
X: It is completely bent and is hard and wrinkled.

(Easy return of cocoon)
The printed fabric was squeezed firmly by hand and then released, and then it was pulled by hand to stretch the wrinkles and visually determine whether the wrinkles could be removed according to the following criteria.
A: The wrinkles disappeared completely.
○: A little bit of cocoon is left, but it is hardly worrisome.
Δ: A considerable amount of soot remains.
X: It does not heal while being bent hard.

(Chalk mark)
Place the printed fabric on a flat table and scratch it with your fingernail to draw a line. Whether or not a whitish line remained was visually determined according to the following criteria.
A: No line is left at all.
○: The line remains a little, but it is hardly worrisome.
Δ: The line remains and is a little anxious.
X: The line remains clearly.

  As apparent from Table 1, none of the fabrics of Examples 1 to 6 corresponding to the fabric according to the present invention has any problems in image quality, color density, and transparency, and ease of wrinkle entry and wrinkle return. The ease of use and the difficulty of generating chalk marks were not problematic in practical use.

  On the other hand, in the fabric of Comparative Example 1 using a semifilar polyester filament yarn having a filament count of 36 filaments as weft yarns, although the glossiness was good, wrinkles were easy to enter and chalk marks were also generated. In addition, the fabric of Comparative Example 2 using 36 filament counts as a weft and a polyester filament yarn having a full gloss has a lower gloss than the fabric of Comparative Example 1 and, like the fabric of Comparative Example 1, the wrinkle is lower. Chalk marks were also generated. The fabric of Comparative Example 3 using 36 filament counts as a weft and a polyester filament yarn having an irregular cross-section with glossiness has a lower color density and translucency than the fabric of Comparative Example 1, and the fabric of Comparative Example 1 In the same way as above, choke marks were easily generated and difficult to return. Further, a warp density of 280 yarns / inch, a weft yarn of 150D thickness and a filament count of 48 semi-dial polyester filament yarns, a weft yarn density of 90 yarns / inch, and satin weave In the fabric of Comparative Example 4, the color density was lowered and chalk marks were generated.

  The internally-illuminated panel fabric according to the present invention is useful because it is lightweight, can be folded without generating chalk marks and wrinkles, has excellent transportability, and is easy to attach and detach.

1 housing 2 LED (light source)
DESCRIPTION OF SYMBOLS 3 Cloth 4 String-like member P Internal illumination type panel 11 Opening part 12 Circumferential groove

Claims (4)

A fabric on which an image is printed on an internally illuminated panel,
The warp and weft constituting the fabric are multifilament yarns,
The warp thickness is in the range of 30D (denier) to 75D, the filament count is 36 or more, and the density is in the range of 140 / inch to 180 / inch,
An internally illuminated panel fabric characterized in that the weft has a thickness of 30D to 75D, a filament count of 48 or more, and a density of 110 / inch to 130 / inch.   The internally-illuminated panel fabric according to claim 1, wherein the warp and the weft are polyester multifilament yarns.   The internally-illuminated panel fabric according to claim 1 or 2, wherein a single yarn fineness of the multifilament yarn is in a range of 0.29 dtex to 1.67 dtex. A housing having an opening; a light source disposed in the housing; and a fabric as a display surface that seals the opening and transmits light from the light source to the outside.
An internally illuminated panel using the fabric according to any one of claims 1 to 3 as the fabric.