JP2007273267A - Luminescent cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminescent cable allowing a coating layer of the cable to be easily discriminated from a stripe-like layer formed on the coating layer. <P>SOLUTION: This luminescent cable has a black-colored or dark-colored coating layer 3 on a cable surface; stripe-like and double-layered molding/extrusion layer 10 is formed on the coating layer 3; and the molding/extrusion layer 10 has a plastic layer 2 colored in a color different from that of the coating layer and a luminescent extrusion/molding layer 1 formed by mixing, in a plastic, a persistence phosphor containing strontium aluminate as a main component on the inner layer side and on the outer layer side, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light-emitting cable having a striped light-emitting layer on a cable covering layer.

  In a light-emitting cable, a plastic “light-emitting extruded layer” in which an afterglow phosphor containing strontium oxide (hereinafter referred to as a phosphorescent material) is mixed on the surface of an extruded layer (coating layer) such as a cable. It is well known to provide the stripes in a stripe shape. The mass ratio of the phosphorescent material (strontium oxide) to 100 parts by weight of the plastic constituting the luminescent extruded layer is in the range of 10 to 100% (see Patent Document 1).

  Examples similar to the light-emitting cable include those described in Patent Documents 2 and 3.

Japanese Patent Laid-Open No. 10-319884 JP-A-11-288627 JP 2000-29389 A

  However, in the light-emitting elongated body described in Patent Document 1, when a striped “light-emitting extruded layer” made of a plastic containing a phosphorescent material is applied to a cable covering layer, the plastic constituting the covering layer Since the base color is mostly black, there is a problem that it is difficult to recognize the stripe-like “luminescent extruded layer”.

  Accordingly, an object of the present invention is to provide a light-emitting cable that can easily distinguish between a cable covering layer and a striped layer provided on the covering layer.

  In order to achieve the above object, the present invention provides a cable having a black or dark coating layer on the cable surface, wherein the coating layer is provided with a two-layer extrusion layer in the form of stripes, and the molding extrusion layer is provided on the inner layer side. A light emitting cable having a light emitting extruded layer in which a plastic layer colored in a color different from that of the coating layer is provided on the outer layer side and an afterglow phosphor mainly composed of strontium aluminate is mixed in the plastic. is there.

  The light emitting extruded layer is formed by mixing an afterglow phosphor with a mass ratio of 10% with respect to the base plastic, and even if the color is a natural color, It may be a colored layer in which an afterglow phosphor is mixed at a mass ratio of 10% and a coloring pigment is mixed at a mass ratio of 0.5 to 3.0%.

  The base plastic is preferably made of polyethylene, polyvinyl chloride, fluororesin, or rubber.

  According to the present invention, it is easy to distinguish between the cable covering layer and the striped layer provided on the covering layer at daytime or when the illuminance is sufficient, and sufficient afterglow characteristics at night or when the illuminance is insufficient. You can achieve that at the same time.

  A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 shows a cross-sectional view of the luminescent cable of the present invention.

  The light-emitting cable of the present invention has a black or dark coating layer 3 around a cable core (cable portion) 4. A part of the coating layer 3 is provided with a molded extruded layer 10 having a two-layer structure in a stripe shape. The molded extruded layer 10 includes a light emitting extruded layer 1 made of natural color plastic containing an afterglow phosphor (hereinafter referred to as a phosphorescent material) mainly composed of strontium aluminate as an outer layer, and a coating layer ( Black) 3 is a plastic layer 2 made of plastic colored in a different color. The luminescent extruded layer 1 is formed and arranged so as to completely cover the plastic layer 2, and the plastic layer 2 is not exposed on the surface of the luminescent cable.

  Here, the “cable” is a generic term for what is generally called a cable, such as a communication cable, an optical fiber cable, a power cable, and an optical composite cable. The cable part 4 may be any wire and cable.

  “Natural color” refers to a color inherent to a base plastic, and is a color in which no pigment is added.

  Examples of the base plastic include polyethylene, polyvinyl chloride, fluororesin, and rubber. As the fluororesin, Teflon (registered trademark) is preferable. Further, as the plastic, a material having high light transmittance is preferable.

  When the covering layer 3 is extruded around the cable core 4, the light emitting cable of the present invention is formed by extruding the forming extruded layer 10, that is, the light emitting extruded layer 1 and the plastic layer 2 simultaneously with the covering layer 3. Can be manufactured. Although the arrangement | positioning of the shaping | molding extrusion layer 10 in a luminescent cable is not specifically limited, For example, it arrange | positions linearly or spirally in the longitudinal direction of a luminescent cable.

  Next, the operation of the present invention will be described.

  When the outer light-emitting extruded layer 1 made of a plastic containing a phosphorescent material has a natural color and sufficient light transmittance, the inner layer of the plastic layer 2 passes through the light-emitting extruded layer 1. Can be recognized through the color watermark. Since the color of the plastic layer 2 is colored differently from the black color of the coating layer 3, the coating layer 3 and the luminescent extruded layer 1 can be easily identified in the daytime (or when the illuminance is sufficient). It can be recognized that the molded extruded layer 10 can function as a colored stripe.

  In addition, since the light-emitting extruded layer 1 has a natural color, the light-emitting extruded layer 1 has little (or almost no) substance that absorbs light, such as a color pigment. Therefore, when the stored light is emitted from the luminescent extruded layer 1 at night (or when the illuminance is insufficient), the light is absorbed inside the luminescent extruded layer 1. Almost no, that is, the afterglow characteristics of the light-emitting extruded layer 1 are hardly impaired, and as a result, the afterglow characteristics can be improved.

  The light emitted from the luminescent extruded layer 1 is a base layer of the luminescent extruded layer 1 and is reflected by the plastic layer 2 colored in a color other than black of the coating layer 3. In this way, by radiating the emitted light with the plastic layer 2 colored in a color other than black, as compared with the case of reflecting light with the coating layer (black coloring) as described in Patent Document 1, The amount of light reflection increases. As a result, the afterglow characteristics of the luminescent extruded layer can be improved as compared with the luminescent elongated body described in Patent Document 1.

  Here, the afterglow characteristic is irradiated with a fluorescent lamp having an illuminance of 200 lx (lux) for 20 minutes by the measurement method defined in Section 5.10 “Phosphorescence Luminance” of JIS Z9107 (safety sign board), and then irradiated. The afterglow luminance after a certain period of time has elapsed (for example, after 5 minutes, 10 minutes, 20 minutes, and 60 minutes), and the standard value is shown in Table 1. When afterglow luminance satisfying the standard values shown in Table 1 is obtained, it can be said that the afterglow characteristics are sufficient.

  In the luminescent cable of the present invention, when the luminescent extruded layer 1 is a natural color, afterglow luminance exceeding the standard value is obtained after 5 minutes, 10 minutes, 20 minutes, and 60 minutes. Sufficient afterglow characteristics can be obtained.

  On the other hand, the light-emitting extruded layer 1 may be colored in addition to the natural color. For example, the phosphorescent material is 10% by mass with respect to the base plastic, and the color pigment is 0.5 to 0.5% by mass. You may mix in the ratio of 3.0%.

  When coloring the luminescent extruded layer 1, when the mass ratio of the phosphorescent material is 10%, if the mixing ratio of the color pigment is in the range of 0.5 to 3.0%, the afterglow characteristics are satisfied. In addition, it can be recognized that the light-emitting extruded layer 1 is colored. Since the light-emitting extruded layer 1 is colored, the coating layer 3 and the light-emitting extruded layer 1 can be easily identified and recognized during the daytime (or when the illuminance is sufficient). Can function as colored stripes.

  Table 2 shows afterglow characteristics data when polyethylene is used as the base plastic and the mass ratio of the color pigment mixed in with the polyethylene is changed.

  As shown in Table 2, when the mass ratio of the color pigment exceeds 3.0% and becomes 4.0%, the afterglow luminance is observed after 5 minutes, 10 minutes, 20 minutes, and 60 minutes. Becomes less than the standard value. Further, when the mass ratio of the color pigment is less than 0.5%, it is difficult to recognize that the plastic is colored.

  Therefore, in the luminescent cable of the present invention, the mass ratio of the color pigment mixed into the base plastic constituting the luminescent extruded layer 1 is specified in the range of 0.5 to 3.0%.

  Next, a modification of the luminescent cable of the present invention will be described.

  As shown in FIG. 2, the basic structure of the luminescent cable of this modification is the same as that of the luminescent cable of the present invention except that the structure of the molded extruded layer 20 is different from that of the luminescent cable of the present invention. The same.

  In the luminescent cable shown in FIG. 1, the luminescent extruded layer 1 is formed and arranged so as to completely cover the plastic layer 2. On the other hand, in the light emitting cable of this modification, the light emitting extruded layer 1 is formed and arranged so as to cover a part of the plastic layer 2, and the plastic layer 2 is sandwiched between the light emitting extruded layer 1 and the light emitting cable. Exposed on the surface.

  According to the light-emitting cable of this modification, the plastic layer 2 colored in a color different from the covering layer 3 is completely exposed on the cable surface, so in the daytime (or when the illuminance is sufficient) The molded extruded layer 20, particularly the plastic layer 2, can be easily identified and recognized as the coating layer 3.

  Next, as shown in FIG. 3, the second modification of the luminescent cable of the present invention is basically the same as the luminescent cable of the present modification except that the structure of the molded extruded layer 30 is different from that of the luminescent cable of the present invention. The structure is the same.

  In the luminescent cable shown in FIG. 1, the entire molded extruded layer 10 is provided integrally with the coating layer 3 and flush with it. On the other hand, in the light-emitting cable of this modification, the plastic layer 2 is provided integrally with the coating layer 3, and the light-emitting extruded layer 1 is provided so as to protrude from the surface of the coating layer 3. That is, the light-emitting cable of the present modification is formed by providing the light-emitting extruded layer 1 on the cable surface on the ridge. The light-emitting extruded layer 1 may be provided so as to completely cover the plastic layer 2, and as shown in FIG. 2, a part of the plastic layer 2 is exposed on the surface of the light-emitting cable. It may be provided.

  According to the light-emitting cable of this modification, the light-emitting extruded layer 1 is provided so as to completely protrude from the cable surface, so that the molded extruded layer 30, particularly in the daytime (or when the illuminance is sufficient). The luminescent extruded layer 1 can be easily identified and recognized as the coating layer 3.

It is a cross-sectional view of the luminescent cable of the present invention. It is a figure which shows the 1st modification of the luminescent cable of FIG. It is a figure which shows the 2nd modification of the luminescent cable of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Luminous extrusion molding layer 2 Plastic layer 3 Coating layer 10 Molding extrusion layer

Claims (4)

  In a cable having a black or dark coating layer on the surface of the cable, the above-mentioned coating layer is provided with a two-layer extrusion layer in the form of stripes, and the molding extrusion layer is colored on the inner layer side in a color different from the coating layer. A light-emitting cable comprising: a plastic layer, and a light-emitting extruded layer in which an afterglow phosphor containing strontium aluminate as a main component is mixed with plastic on an outer layer side.   The light-emitting cable according to claim 1, wherein the light-emitting extruded layer is formed by mixing an afterglow phosphor with a mass ratio of 10% with respect to a base plastic, and the color is a natural color.   The light-emitting extruded layer is a colored layer in which an afterglow phosphor is mixed with a base plastic in a mass ratio of 10% and a color pigment in a mass ratio of 0.5 to 3.0%. The luminescent cable according to claim 1. The luminescent cable according to any one of claims 1 to 3, wherein the base plastic is made of polyethylene, polyvinyl chloride, fluororesin, or rubber.

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