JPS60246510A - Method of producing water bridging wire and cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Background and Objectives of the Invention] The present invention relates to a method for manufacturing electric wires and cables by water (silane) crosslinking. Conventionally, the manufacturing method for this type of cross-linked wire/cable is as follows:
Manufacturing methods using electron beam irradiation and chemical crosslinking using peroxide are industrially practiced. Recently, a manufacturing method has been industrialized in which a hydrolyzable organic polymer containing 7 unsaturated molecules is used and cross-linked with water. Among the above-mentioned manufacturing methods, the water-crosslinking method is attracting attention because crosslinking is easy because it can be crosslinked even at room temperature by soaking the rubber/plastic layer in water. By the way, if we look at a specific method for manufacturing electric wires and cables using water bridges, it is generally carried out through the following manufacturing steps. 1. First, a rubber/plastic material for water crosslinking mixed with a hydrolyzable unsaturated material is extruded and coated on the circumference of the conductor as an insulator, and the insulated wire thus produced is wound around a drum, and then the insulated wire is This is done by leaving the drum wrapped with electric wire in a high-temperature, high-humidity room for a predetermined period of time. However, IT et al. looked at the water bridge method and found that when there are many stages of wire winding layers, especially in the middle and middle of the winding layers.
For insulated wires located in areas where water cross-linking may take a considerable amount of time, it may occur that the wires are not cross-linked. Also,
In the case of an insulated wire consisting of an insulating coating with protrusions on the surface extruded around the conductor 1, there is a risk that the protrusions will be crushed when the torano... If this is done, the protrusions will remain crushed even after water cross-linking.In addition, there is a disadvantage that the protrusions will remain crushed even after water cross-linking. A high-humidity room is always required for dry cleaning, which also has the disadvantage that the equipment is expensive. The object of the present invention is to eliminate the drawbacks of the prior art described above.
Water-bridged electric wire/couple that can be uniformly cross-linked in a short period of time, and can be cross-linked without crushing the protrusions of coating layers with protrusions, and can be cross-linked only by providing a high-temperature chamber. Our goal is to provide a manufacturing method for horns. [Summary of the invention] Water-crosslinking rubber/plastic is extruded onto the circumference of the conductor directly or through a coating layer 2 to completely eliminate M 'it'.
A step of wrapping one piece of wire/cable and a tape containing moisture around the outer circumference of the insulated wire/cable, and a step of winding the insulated wire/couple with the tape formed on a drum. 1) Put the ram in a high temperature room and evaporate the water contained in the tapes to form a water bridge. It is in the method of spinning water-bridged electric wires and cables. . In addition, rubber/plastic for water crosslinking and 1-te JjllA
For example, polyethylene resin, acid-resistant vinyl copolymer, nib-leno-acrylic acid or a copolymer with sprue, ethylene resin, etc.

【Ko! -'shi/ (or Geno Shitsuma) copolymer, "freno-no-breno copolymer 1
Alternatively, a mixture of 11+ polymers such as chlorinated polynib-leno with υ11 water-splitting unsaturated material such as vinyl 7 run, etc., is used. [Example] Hereinafter, an example of the present invention will be explained.
1] unsaturated 7 run capable of splitting water, Lanocal cattle agent,
70ki7... A water-crosslinkable polyethylene mixed with a polycondensation catalyst or the like is extruded and coated around the conductor L using an extruder to form a predetermined water-crosslinkable insulated wire. Next, a tape containing sufficient moisture (for example,
A hydrous sponge tape with a predetermined thickness is wound in a spiral shape with 1/2 laps. Next, the insulated wire with a layer of water-impregnated tape formed on its own circumference is traversed. After that, the toran is left in a high temperature room for a predetermined period of time.(2) The water in the water-containing tape layer is evaporated, and the evaporated water is The production process is completed by cross-linking the polyethylene for the bridge with water.In general, the sponge tape is removed when production is completed, but the insulated wires may be damaged during movement (transportation). It is also conceivable to wrap the insulated wires as a protective material until they are laid so as not to cause any damage.According to one embodiment of the present invention, insulated wires with water-containing tape previously wrapped around each other are wrapped around the drum. Since the coils are wrapped around the drum and then released into a high temperature room, the insulation of the steam is better than the conventional method of leaving a drum wrapped with insulated wire inside the room. Penetration into the entire wire winding layer is quite quick.As a result, it is possible to water-bridge the insulated wire wound around the drum in a shorter time than with conventional methods.
3. There is no fear that the unmounted part of the machine will break out, unlike in the past. 7
The first step is to prepare a greenhouse height of j'7゜inside the high humidity chamber with river sand as in the past. 7th Senj is cheap, 1H,
,,1 becomes. In addition, in the non-implemented section (, (1, -, non 1 Outer table Yamaoki fζ+
! It is also possible to use it for manufacturing insulated wires, etc., which have a constant 4.degree. In particular, for electric wires with protrusions, the protrusions are covered with sponge tape so that there is no risk of the wire being crushed when the wire is wound around a drum. In addition to the tape, cloth tapes, paper tapes, braided tapes, composite tapes made by combining the above-mentioned tapes, or other tapes that can contain water can be used. In order to quickly vaporize the moisture in the water-containing tape,
It is also conceivable to provide through holes in the drum body or brim to improve heat circulation from the drum body or brim to each winding layer. In this example, a water-containing tape is spirally wound around an insulated wire, but by spirally winding a water-free tape on the outer circumferential surface of an insulated wire or attaching it vertically, and then passing it through a water tank. Alternatively, the tape may be impregnated with water. [Effects of the Invention] As described above, according to the present invention, water bridge electric wires/cables wrapped with water-containing tape are wound around a drum, and the drum is placed in a high-temperature room. Steam is generated from the six turns of the wound water-bridged electric wire/cable itself, making it possible to manufacture uniformly water-cross-linked electric wires/cables in a short period of time, and its industrial value is extremely high. be.

Claims (1)

[Claims] 1. The process of forming an insulated wire/cable by extruding water-crosslinking rubber/plastic on the circumference of the conductor directly or through an arbitrary coating layer, and the process of forming an insulated wire/cable with water-containing tapes. A step of winding the insulated wire/cable around the outer circumference of the insulated wire/cable, a step of winding the insulated wire/cable into a drum after the above-mentioned tapes are formed, and a step of putting the drum into a high temperature room to remove the moisture contained in the tape. A method for manufacturing water-crosslinked electric wires and cables, comprising the step of water-crosslinking the water-crosslinking rubber/plastic by evaporating the water-crosslinking rubber/plastic. 2 Special tape using sponge tape, r+
A method for manufacturing a water bridge electric wire/cable according to claim 1.