JP2001035268A - Luminous cable and constructing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily confirm the presence of a cable, even in the dark by use of a blacklight in construction by mixing a mouse inhibitor and a light converging materiel and/or a fluorescent material to the sheath of a cable, and forming irregularities on the sheath. SOLUTION: A set proof agent and light converging material and/or a fluorescent material are mixed to the sheath of a cable having one or a plurality of insulating core wires. Irregularities are preferably formed on the sheath. As the insulating sheath, vinyl chloride resin can be used. Examples of the rat proof agent include cycloheximide, capsaicin, amine compound, mercaptane derivative, creosote oil, and pyridine compound, and these can be microencapsuled, in order to enhance the mouse inhibiting effect. The rat proof agent is desirably used in an amount of 0.1-20 pts. wt. to 100 pts.wt. of the vinyl chloride resin. The mixing quantity of the fluorescent material or light converging material is desirably 0.001-10 pts.wt. to 100 pts.wt. of the vinyl chloride resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable in which an anti-rat agent and a light-collecting substance and / or a fluorescent substance are blended in the outer skin of the cable, and a method of using the same and using a black light.

[0002]

2. Description of the Related Art A cable has one or a plurality of insulated core wires inside, and is covered with a sheath made of a thermoplastic resin, for example, polyethylene or polyvinyl chloride, as an outer sheath. Protected. And, as can be confirmed even in the dark, a cable provided with a fluorescent substance on the outer protective layer of the cable is disclosed.For example, a cable in which a commercially available fluorescent paint is applied on the outer protective layer of the cable by a dipping method is disclosed. This is known (JP-A-63-257117).

[0003]

By the way, in the dark,
Cables are complicatedly laid indoors and outdoors, and at the time of construction, maintenance, and inspection, it is difficult to distinguish them from cables used for other wiring, and there is a problem that they are accidentally cut. Also,
A cable provided with a fluorescent layer may come off the fluorescent layer by contacting or colliding with a harder substance. On the other hand, there are a large number of small animals in the outside world, and damage to the cable hull by rats has given a serious problem to cable durability and the like.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the inventors of the present invention have made intensive studies and found that a cable in which a rat-proofing agent and a light-collecting substance or a fluorescent substance are blended on the outer sheath of the cable has irregularities. And found that the cable can be easily confirmed even in darkness by using a black light, and arrived at the present invention.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a light-emitting cable obtained by blending an outer sheath of a cable having one or more insulated core wires with a rodent-proofing agent, a light-collecting substance and / or a fluorescent substance. In order to enhance the light emitting effect, it is preferable to make the outer skin uneven. In addition, when using the light emitting cable according to the present invention for construction, by using a black light, the presence of the cable can be clearly confirmed even in darkness.

[0006] A vinyl chloride resin can be preferably used mainly as an insulating outer skin in which the rat-proofing agent of the present invention and a light-collecting substance or a fluorescent substance are blended. Examples of the vinyl chloride resin include polyvinyl chloride, a copolymer mainly composed of vinyl chloride, and a graft copolymer. Examples of the monomer compound that can be copolymerized with the vinyl chloride monomer include vinylidene chloride, ethylene, propylene, acrylonitrile, maleic acid, itaconic acid, acrylic acid, methacrylic acid, and vinyl acetate.

[0007] The production method of these vinyl chloride resins is not particularly limited, and may be those produced by any of an emulsion polymerization method, a suspension polymerization method, a solution polymerization method, and a bulk polymerization method. Further, from the viewpoint of the physical properties and processability of the composition, the average degree of polymerization of the vinyl chloride resin is 400 to 1.
000, particularly preferably 600 to 2,500. If the average degree of polymerization is less than 400, the strength properties are poor.
If it exceeds 000, the processing characteristics deteriorate.

Examples of the plasticizer for the vinyl chloride resin include phthalic acid derivatives such as di-n-octyl phthalate, diisononyl phthalate, di-2-ethylhexyl phthalate, dibenzyl phthalate, diisodecyl phthalate, didodecyl phthalate and diundecyl phthalate. ;
Isophthalic acid derivatives such as dioctyl isophthalate;
Adipic acid derivatives such as di-n-butyl adipate and dioctyl adipate; maleic acid derivatives such as di-n-butyl maleate; citric acid derivatives such as tri-n-butyl tosylate; itaconic acid derivatives such as monobutyl itaconate; Oleic acid derivatives such as oleate;
Ricinoleic acid derivatives such as glycerin monoricinoleate; other trimellitic acid ester plasticizers such as trioctyl trimelliate; phosphate ester plasticizers such as tricresyl phosphate and trixylenyl phosphate; epoxidized soybean oil; epoxy resin Plasticizer,
Examples include polyester-based plasticizers. These can be used alone or in combination.

These plasticizers are used in an amount of 20 to 150 parts by weight based on 100 parts by weight of the vinyl chloride resin.
Particularly, 30 to 100 parts by weight is preferable. When the amount of the plasticizer is less than 20 parts by weight, the moldability is poor. On the other hand, when the amount of the plasticizer exceeds 150 parts by weight, the mechanical properties and the electrical properties are hindered. Also,
In addition to the plasticizer, additives such as a heat stabilizer, a discoloration inhibitor, a heat aging inhibitor, a stabilization aid, a filler, a processing aid, a flame retardant, and a lubricant are added as additives to the composition. Can be.

The rat-controlling agent used in the present invention includes, but is not limited to, cycloheximide, capsaicins, amine compounds, mercaptan derivatives, creosote oil, pyridine compounds and the like. A microencapsulated product can also be used. These rat-control agents are used in an amount of 0.1 to 20 parts by weight, more preferably 0.5 to 20 parts by weight, based on 100 parts by weight of the vinyl chloride resin.
5 parts by weight. If the amount is less than 0.1 part by weight, the rat-proof effect is insufficient, while if it exceeds 20 parts by weight, the concealing property of the composition is increased, and the light-emitting effect may be reduced.

As the fluorescent substance used in the present invention, inorganic fluorescent dyes / pigments and organic fluorescent dyes / pigments can be used. Examples of the inorganic fluorescent dye / pigment include zinc silicate, zinc cadmium sulfide, calcium sulfide, strontium sulfide, calcium tungstate, and zinc sulfide alone or in combination with an activator. For example, ZnS-Cu, ZnS-Mn, ZnS-A
g, ZnS-Bi, and the like. Organic fluorescent dyes
Examples of the pigment include polyphenyl, stilbene, oxazole, oxadiazole, coumarin,
Xanthene-based, oxazine-based, thiazine-based, polymethine-based (cyanine-based), pyridine-based compound, dithiol-Ni complex, naphthalimide-based compound, phthalocyanine-based compound, azo-based dye (eg, methyl orange, methyl red, etc.), perylene and its derivatives, Thioflavin, brilliant sulfoflavin, eosin, basic flavin, acridine orange, rhodamine 6G, rhodamine B and the like. Particularly, a Naphthalimid dye, a Perylene dye, and the like are preferable. As a commercially available product, for example, a product name “Lumogen” manufactured by BASF
COLOR "and the like. Further, the fluorescent substance includes a phosphorescent phosphor, and as the phosphorescent phosphor,
A fluorescent substance having a mother crystal of a compound represented by MAl ₂ O ₄ or MAl ₁₄ O ₂₅ (M is at least one metal element selected from the group consisting of calcium, strontium, and barium) is given. As described above, M is at least one metal element selected from the group consisting of calcium, strontium, and barium, but magnesium can be added as necessary. Further, as an activator, europium can be preferably contained in an amount of preferably 0.001 to 10 mol% with respect to the metal element represented by M. More preferably, as a co-activator, lanthanum, cerium, praseodymium, nadium, samarium, gadolinium, terbium, disprosium, holmium, erbium, thulium, at least one selected from the group consisting of ytterbium, lutetium, manganese, tin, bismuth. The element can also be contained in an amount of preferably 0.001 to 10 mol% based on the metal element represented by M. For example, SrAl ₂ O ₄ : Eu, CaAl
₂ O ₄ : Eu, BaAl ₂ O ₄ : Eu and the like. Commercially available products include, for example, "N Night Light (LumiNova)" manufactured by Nemoto Special Chemical Co., Ltd., "Super Super Luminescent Pigment" manufactured by Shinloich Co., Ltd. The light-collecting substance used in the present invention is preferably a fluorescent substance obtained by industrially purifying impurities in the fluorescent substance to increase the purity.

The amount of the fluorescent substance or the light-collecting substance is 0.1 to 100 parts by weight of the vinyl chloride resin.
001 to 10 parts by weight, more preferably 0.1 to 5 parts by weight. When the amount is less than 0.001 part by weight, the luminous effect is insufficient. On the other hand, when the amount exceeds 10 parts by weight, the concealing property of the composition is increased, and the luminous effect may be reduced. When a fluorescent substance is used, a white pigment, for example, titanium dioxide can be suitably mixed. The compounding amount of the white pigment is 0.001 to 10 parts by weight, more preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the vinyl chloride resin. If the amount is less than 0.001 part by weight, the luminous effect is insufficient. If the amount is more than 10 parts by weight, the concealing property of the composition is increased and the luminous effect is reduced.

In the present invention, a vinyl chloride resin composition comprising a rat-proofing agent and a light-harvesting substance and / or a fluorescent substance is rolled, kneaded together with the above-mentioned plasticizer and additives, if necessary. It can be obtained by mixing, stirring, and melt-kneading using a kneading machine. The melt-kneading temperature is 150 to 230 ° C. When the melt-kneading temperature is lower than 150 ° C., the components are not sufficiently dispersed in the resin, and the desired physical properties cannot be obtained.
If the temperature exceeds ℃, the components are decomposed, resulting in a decrease in physical properties.

[0014] The light emitting cable of the present invention is preferably provided with irregularities on the outer cover. As a method of providing unevenness on the cable jacket of the present invention, there are a method of providing a sharp projection in the longitudinal direction of the cable jacket and a method of providing unevenness on the surface of the cable jacket during the step of extruding the cable jacket. In the former case, the acute angle is mainly determined by the shape of the die. In the latter case, the shape of the special roll having irregularities and the resin temperature may cause the emergence of acute angle. The dimensions (dents) of the sharp projections or irregularities formed on the cable surface by any of these methods depend on the type of light-collecting substance or fluorescent substance to be used and the amount thereof, Although it depends on the size of the diameter and the light emitting means, it is usually 0.03
-0.5 mm, preferably 0.05-0.3 mm, more preferably 0.07-0.2 mm. When the size is less than 0.03 mm, no light is emitted. On the other hand, when the size exceeds 0.5 mm, it hardly contributes to the effect of exhibiting light emission.

[0015] In order to secure the acute angle, 160 to 17
It is necessary to gradually cool the resin extruded at 0 ° C. to an appropriate temperature. Preferably 60 to 120 ° C, more preferably 80
１００100 ° C. If the temperature is lower than 60 ° C., it is not possible to secure the acute angle in an optimum state, while if it exceeds 120 ° C., the shape may be lost.

The light-emitting cable of the present invention can be easily distinguished from cables used for other wiring by being used under black light (ultraviolet lamp) when it is laid out indoors and outdoors in the dark at night. There is no problem of accidental disconnection. In addition, the fluorescent layer does not come off due to contact or collision with a hard substance, and the light emitting effect is maintained without damaging the cable jacket by small animals such as rats.

[0017]

The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to these examples. In the examples, parts and percentages are by weight unless otherwise specified.

Example Preparation of cable sheath Vinyl chloride resin [TK-1 manufactured by Shin-Etsu Chemical Co., Ltd.
300 "(average degree of polymerization 1,300)] to 100 parts of a polyester plasticizer (adipic polyester,
"W-2300" manufactured by Dainippon Ink and Chemicals, Inc.)
45 parts, epoxidized oil (Asahi Denka Kogyo Co., Ltd., “O
-130S "), 2 parts of Ba-Zn based stabilizer (manufactured by Asahi Denka Kogyo Co., Ltd.," RUP-14 "), and 2 parts of rat proofing agent (manufactured by Nippon Kayaku Co., Ltd.," R731 "). In Example 1, 1 part) was uniformly mixed and dispersed to prepare a compound. A light-collecting substance or a fluorescent substance described below was added to the above mixture, and a vinyl chloride-based resin composition as a coating material was formulated and used as a raw material.

The raw materials were dry-blended by a tumbler mixer, charged into a 90 mm extruder through a feed port, and kneaded at a processing temperature of 170 ° C. for a residence time of 2 minutes. Then, as shown in FIG. 1, the conductor 1 is coated with an insulator 2 and the above-described coating material is applied to the outer periphery of the die 1 at a temperature of 16 mm.
The cable was obtained by extrusion coating at 0 ° C. Further, using a special roll (protrusion width 2.0 mm, projection height 0.5 mm, number of protrusions 4 / cm) in the longitudinal direction of the cable,
At 0 ° C, many irregularities are provided on the entire cable surface,
The sample was gradually cooled to 70 to 80 ° C. to prepare a sample.

Example 1 and Example 2 (Blending of light-harvesting substance) A light-harvesting pigment (RKN11 manufactured by Dainichi Seika Kogyo Co., Ltd .;
9 ") was mixed as a coating material. By irradiating the cable obtained by extrusion coating with this coating material with black light, it was possible to emit light in the dark in the same manner as a fluorescent substance and to obtain a result that can be confirmed up to color identification (see Table 2). further,
By providing a large number of uneven portions, the light emitting effect was enhanced. At this time, the luminous effect changed depending on the size of the uneven portion (see Table 1). In this case, the effect is higher as the angle of the concave and convex portions is closer to a right angle, and if it is desired to enhance the luminescence, the compounding amount of the anti-rat agent may be reduced.

Example 3 (Blending of Fluorescent Substance) A fluorescent pigment (FP-3000, manufactured by Nippon Shokubai Co., Ltd.) as a fluorescent substance was used as a colorant with respect to 100 parts of the above blend.
H ") and 0.1 part of titanium oxide (" E-180 "manufactured by Dainichi Seika Kogyo Co., Ltd.) were mixed to obtain a coating material. When the cable obtained by extrusion-coating this coating material was irradiated with black light, the cable emitted light in the dark, and results were obtained which could be confirmed up to color identification (see Table 2).

COMPARATIVE EXAMPLE Preparation of cable sheath A cable sheath was prepared in exactly the same manner as in the example except that the rat-proofing agent of the composition of the example was omitted. Comparative Example 1 (Blending of Coloring Agent) With respect to 100 parts of the above blending agent, a general pigment containing no fluorescent pigment as a coloring agent (“E-
180 ") was used as a coating material, and the luminous properties were evaluated in the same manner as in the example. However, similar results were not obtained with a common polyvinyl chloride sheathed cable of the same size (Table 2). reference).

Evaluation method The luminous property of the cable sheath was evaluated in a dark room using a black light [Om Electric Co., Ltd .;
(4 watts)], and the distance between the cable containing the black light and the coloring agent was set to 5 meters. ：: Significant light emission. ：: emits light. Δ: Light is slightly emitted. X: No light emission.

[0024]

[Table 1]

[0025]

[Table 2]

* 1: Equivalent to 1 part of rat-proofing agent added when preparing cable sheath * 2: Equivalent to 2 parts of rat-proofing agent added when preparing cable sheath

[0027]

According to the present invention, when a cable is laid outdoors outdoors in the dark at night or when it is laid indoors in a dark space, it can be easily distinguished from cables used for other wiring. , Laying work is easy, there is no problem of accidental cutting, the fluorescent layered material is not peeled off by contacting or colliding with hard material, and furthermore, there is no damage to the cable sheath by small animals such as rats and luminous effect Lasting cable can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a light emitting cable of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductor 2 Insulator 3 Coating material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Yamamoto 3-11-5 Nihonbashi Honcho, Chuo-ku, Tokyo Inside RIKEN Vinyl Industry Co., Ltd. (72) Inventor Hiroji Yokomizo 10 Suzukawa, Isehara-shi, Kanagawa Prefecture Fuji Electric Wire Co., Ltd. (72) Inventor Masato Kurihara 1-26 Kanda Sakuma-cho, Chiyoda-ku, Tokyo F-term (reference) ) 2B121 AA03 CC22 FA13 5G313 EA07 EB11 5G315 JB04 JC04

Claims (3)

[Claims] 1. A light-emitting cable comprising a cable having one or a plurality of insulated core wires, and a rod-proofing agent and a light-collecting substance and / or a fluorescent substance mixed with the outer sheath. 2. The light emitting cable according to claim 1, wherein the outer skin is provided with irregularities. 3. A method for constructing a light emitting cable, wherein the light emitting cable according to claim 1 is used under irradiation of a black light (ultraviolet lamp).