JPH0658525U - Vinyl insulated vinyl sheath cable - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a uniform releasability and an appropriate releasability without causing the release agent to scatter. [Structure] A conductor is coated with an insulator of vinyl chloride resin by extrusion, and a predetermined amount of a vinyl chloride resin composition containing silicone in a predetermined amount of a plasticizer / stabilizer / filler is coated on the insulator. The vinyl chloride resin composition is extrusion-coated to a thickness, and a vinyl chloride resin sheath is extrusion-coated on the vinyl chloride resin composition. In the vinyl-insulated vinyl-sheathed cable thus formed, the silicone contained in the vinyl chloride resin composition interposed between the insulator and the sheath seeps out to the interface with the insulator and the interface with the sheath. . The exudation between the insulator and the sheath is ensured by the silicone exuding on the interface with the insulator and the interface with the sheath.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vinyl-insulated vinyl sheath cable, and more particularly to a vinyl-insulated vinyl sheath cable that can easily separate an insulator and a sheath without applying and filling a release agent.

[0002]

[Prior art]

 The number of insulated wires and cables covered with synthetic resin is increasing due to their good insulation performance. Vinyl chloride resin is mainly used as the synthetic resin used for insulating such electric wires and cables. Also, as this vinyl chloride resin, soft polyvinyl chloride is used because it is mechanically fairly strong, flame-retardant, has good chemical resistance and electrical characteristics, and because it is easy to color and is easy to machine. There is.

A vinyl chloride resin composition constituting an insulator is conventionally mixed with 100 parts by weight of vinyl chloride resin, 30 to 100 parts by weight of a plasticizer, 1 to 10 parts by weight of a stabilizer, and 50 to 200 parts by weight of a filler. Is configured. Such a vinyl chloride resin is used for an insulator and a case. As shown in FIG. 3, a vinyl insulated vinyl sheath cable (JIS C 3342) defined by the Japanese Industrial Standards (JIS) covers a conductor 11 with a vinyl chloride resin as an insulator 12, and A vinyl-insulated vinyl sheath cable 10 is constructed by coating a vinyl chloride resin as the sheath 13 on the top. When such a vinyl chloride resin is coated on the conductor 11 or as the sheath 13, a gelled vinyl chloride resin is extruded and coated using an extruder.

However, by covering the conductor 11 with the vinyl chloride resin insulator 12 and covering the insulator 12 with the vinyl chloride resin sheath 13, the insulator 12 and the sheath 13 are formed. Since vinyl chloride resin has affinity with each other, when heat is applied from the outside, fusion occurs, and when performing wiring work, insulation 12 and sheath 13 do not separate and wiring work cannot be done. Things happen. Therefore, conventionally, as shown in FIG. 4, after covering the conductor 11 with an insulator 12 of vinyl chloride resin, a release agent 14 is applied on the insulator 12, and the release agent 14 is applied on the release agent 14. The vinyl chloride resin sheath 13 is coated to prevent the vinyl chloride resin (insulator 12 and sheath 13) from fusing together.

[0005]

[Problems to be solved by the device]

 However, after covering the conductor 11 with an insulator 12 of vinyl chloride resin, a release agent 14 is applied on the insulator 12, and a vinyl chloride resin is applied on the release agent 14. Since the conventional vinyl-insulated vinyl sheathed cable 10 covering the sheath 13 of FIG. 1 is a system in which the release agent 14 is applied and filled, the amount of the release agent 14 applied and filled is not constant and is likely to change. Therefore, the conventional vinyl-insulated vinyl sheath cable 10 has a problem that the peelability between the insulator 12 and the sheath 13 varies and the product performance deteriorates.

In addition, in the conventional vinyl-insulated vinyl sheath cable 10, after covering the conductor 11 with the vinyl chloride resin insulator 12, the stripper 14 is applied onto the insulator 12. Since the sheath 13 made of vinyl chloride resin is coated on the release agent 14, it is difficult to control the application / filling amount of the release agent 14 applied on the insulator 12. Have a point.

Further, in the conventional vinyl-insulated vinyl sheath cable 10, after covering the conductor 11 with the vinyl chloride resin insulator 12, the release agent 14 is applied onto the insulator 12. Since the release agent 14 is covered with the vinyl chloride resin sheath 13, the release agent 14 scatters when the release agent 14 is applied on the insulator 12, which is not preferable for environmental hygiene. I have a problem.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a constant release property without causing scattering of the release agent. At the same time, the present invention aims to provide a vinyl-insulated vinyl sheath cable capable of realizing appropriate peelability.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the vinyl-insulated vinyl sheathed cable according to the present invention is a vinyl-insulated vinyl sheathed cable insulator in which a vinyl chloride-based resin insulator is extruded and coated on a conductor and then a vinyl chloride-based resin is coated as a sheath. A vinyl chloride resin composition containing a predetermined amount of a plasticizer / stabilizer / filler containing silicone is extruded to a predetermined thickness and is interposed between the sheath and the sheath.

The vinyl chloride resin composition comprises 100 parts by weight of polyvinyl chloride resin having an average degree of polymerization of 800 to 2000, 30 to 100 parts by weight of a plasticizer, 1 to 10 parts by weight of a stabilizer, and 50 to 50 parts of a filler. It is preferable to mix 200 parts by weight and 5 to 30 parts by weight of silicone.

[0011]

[Action]

 A vinyl chloride resin composition is extruded and coated on the conductor, and a vinyl chloride resin composition containing a certain amount of plasticizer / stabilizer / filler containing silicone is coated on the insulator to a specified thickness. It is extrusion-coated, and a vinyl chloride resin sheath is extrusion-coated on the vinyl chloride resin composition. In the vinyl-insulated vinyl sheath cable formed in this way, the silicone contained in the vinyl chloride resin composition interposed between the insulator and the sheath exudes to the interface with the insulator and the interface with the sheath. Come on. The silicone exuding on the boundary surface with the insulator and the boundary surface with the sheath can ensure the peeling property between the insulator and the sheath.

[0012]

【Example】

 Examples of the vinyl insulated vinyl sheath cable according to the present invention will be described below. FIG. 1 shows an embodiment of a vinyl insulated vinyl sheath cable according to the present invention.

In the figure, reference numeral 1 is a vinyl insulated vinyl sheath cable. Reference numerals 2 and 3 denote conductors. An insulator 4 is extrusion-coated on the conductor 2, and an insulator 5 is extrusion-coated on the conductor 3. The insulators 4 and 5 are made of a vinyl chloride resin composition. Reference numeral 6 denotes an inner sheath that is extrusion-coated on the two insulators 4 and 5. An outermost layer sheath 7 is extrusion-coated on the inner sheath 6. The outermost layer sheath 7 is made of a vinyl chloride resin composition like the insulators 4 and 5.

The inner sheath 6 is formed on the insulators 4 and 5 to have a thickness of 0.05 mm to 0.20 mm. The inner sheath 6 is composed of the composition shown in Table 1.

Table 1 The inner sheath 6 comprises 100 parts by weight of a polyvinyl chloride resin having an average degree of polymerization of 800 to 2000, 30 to 100 parts by weight of a plasticizer, 1 to 10 parts by weight of a stabilizer, and 50 to 200 parts by weight of a filler. , 5 to 30 parts by weight of silicone are further mixed. Since this silicone is liquid, it is mixed with a liquid plasticizer and kneaded with the polyvinyl chloride resin. This silicone has no affinity with the vinyl chloride resin and is hardly compatible with it. When the polyvinyl chloride resin thus kneaded with silicone is extrusion-coated on the insulators 4 and 5, it takes about 24 hours from the extrusion-coated polyvinyl chloride resin on the insulators 4 and 5. The silicone that is not compatible with the polyvinyl chloride resin bleeds on both the inner and outer surfaces of the inner sheath 6. The silicone bleeding on both the inner and outer surfaces of the inner sheath 6 acts on the interface between the insulators 4 and 5 and the inner sheath 6 and the interface between the outermost layer sheath 7 and the inner sheath 6. That is, the silicone bleeding on both the inner and outer surfaces of the inner sheath 6 causes peelability between the outermost layer sheath 7 and the inner sheath 6, and peelability between the inner sheath 6 and the insulators 4 and 5.

Examples of the plasticizer include esters of various acids such as phthalic acid and adipic acid. As the stabilizer, there are Pb-based, Ca-based, Zn-based, Sn-based, epoxidized soybean oil, etc. alone or in combination. Further, the filler includes calcium carbonate, aluminum silicate, magnesium hydroxide and the like.

As the silicone, one having a molecular weight of 500 to 6000 is used. This is because the magnitude of the molecular weight of this silicone is related to the viscosity of the silicone, and the optimum viscosity when mixed with a plasticizer is a molecular weight of 500 to 6000. Further, the content of silicone is mixed with 100 parts by weight of polyvinyl chloride resin in an amount of 5 to 30 parts by weight. When the content is less than 5 parts by weight, sufficient peeling is achieved even when bleeding on both inner and outer surfaces of the inner sheath 6. If the amount exceeds 30 parts by weight, the releasability is too good, and the silicone bleeding may ooze out on both the inner and outer surfaces of the inner sheath 6.

In the above-mentioned embodiment, the vinyl-insulated vinyl sheathed cable is shown, but the present invention can be applied to the vinyl-insulated vinyl sheathed coated cable.

[0019]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

In the vinyl-insulated vinyl sheath cable according to claim 1, an insulator and a sheath of a vinyl-insulated vinyl sheath cable in which a vinyl chloride-based resin insulator is extruded and coated on a conductor and then a vinyl chloride-based resin is coated as a sheath. Since a vinyl chloride resin composition containing a predetermined amount of plasticizer / stabilizer / filler containing silicone is extruded and coated to a predetermined thickness between and, the release agent will not scatter. It is possible to provide constant peelability and to realize appropriate peelability without inviting.

In the vinyl-insulated vinyl sheath cable according to claim 2, 100 parts by weight of the polyvinyl chloride resin composition having a mean degree of polymerization of 800 to 2000 are added to 30 parts by weight of a plasticizer, and 1 to 10 parts of a stabilizer. Since the composition is made by mixing 50 parts by weight of the filler, 50 to 200 parts by weight of the filler, and 5 to 30 parts by weight of the silicone, it is possible to obtain a constant releasability and to realize an appropriate releasability.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing an embodiment of a vinyl insulated vinyl sheath cable according to the present invention.

2 is a cross-sectional view of the embodiment shown in FIG.

FIG. 3 is a partial cross-sectional perspective view of a conventional vinyl-insulated vinyl sheath cable.

4 is a cross-sectional view of the vinyl insulated vinyl sheath cable illustrated in FIG.

[Explanation of symbols]

1 …………………………………………………… Vinyl insulation Vinyl sheath cable 2, 3 ………………………………………… Conductor 4, 5 ………… Insulator 6 ……………………………………………… Inner sheath 7 …………………………………… ………… Outermost layer sheath

Claims (2)

[Scope of utility model registration request] 1. A vinyl-insulated vinyl sheath cable in which an insulator of vinyl chloride resin is extruded and coated on a conductor, and a sheath of vinyl chloride resin is coated on the conductor, and a predetermined amount is provided between the insulator and the sheath. A vinyl-insulated vinyl sheath cable in which a vinyl chloride resin composition containing silicone in a plasticizer / stabilizer / filler is coated and interposed. 2. The vinyl chloride resin composition comprises 100 parts by weight of a polyvinyl chloride resin having an average degree of polymerization of 800 to 2000, 30 to 100 parts by weight of a plasticizer, 1 to 10 parts by weight of a stabilizer, and 50 to 200 parts of a filler. The vinyl-insulated vinyl sheath cable according to claim 1, wherein the vinyl-insulated vinyl sheath cable is formed by mixing 5 parts by weight of silicone and 5 to 30 parts by weight of silicone.