SU564659A1 - Method for manufacturing shielded cable with metallized sheathing - Google Patents

Description

(54) METHOD OF MANUFACTURING CABLE SCREEN

one

The invention relates to the manufacture and operation of communication cables with metallized sheaths.

There are known methods for manufacturing NEAPEPS, which are connected in the core winding by alternating layers of metal and popimer, in which steel and aluminum tapes are used for shielding elements, are wound on polymeric wraps ij.

However, such methods are characterized by high metal consumption and insufficient tightness of cable sheaths.

There is a known method of making a cable with; 1. The generation of a metallized polymer film 2J, t

However, the adhesive bonding of polymer and metal elements of the sheaths is cedar-resistant when exposed to media, which leads to a change in the electrical and mechanical characteristics of the cables.

The aim of the invention is to increase the reliability of fixing the shielding of the cable sheath; and lower metal consumption.

2

For this, the core is faced with the monHacTH4KbkM thermal material with a half-dimensional material, which is converted into a gelatinous state. The thermoplastic is plasticized in a heated well -: dkofae1 OM a plasticizer., Followed by UV1; 1 cent. Before gel formation. The plasticizer is then washed away.

As dispersion media for polymer studes, weights that are interfering with BOJDOH m- can be used; liquids with high dielectric properties you, for example, mineral oils.

Example 1-. On metal

core extrusion method - form the shell of low density polyethylene (GOST 16337-70). Lined ser.nachnika enters the bath with cable

C 110 oils, heated to 100 ° C, in which plasticization of the surface layer occurs (o6oj) o4KHi. liquid (.cable yes). The outer layer spray of the outer layer is washed off with a solvent to disperse the sion medium, for example acetone. Then the cable is passed through an electrolyte bath, where it is subjected to chemical copper plating according to known technology. In pro. During the copper process, the solvent in the jell cells is replaced with the phase copper-containing compounds. The deposited copper layer is firmly fixed, deposited in the cells of the polymer shell of the sheath, and provides reliable shielding of the cable. P and I m p 2. The core of the cable is lined with a high-density polyethylene flax extruder (GOST 16338-70) and then a mixture of polyethylene with acetylene black (2: 1 weight ratio). Litter bath core is passed through a bath with mineral oil (100), cooled to gelation; then wash the plasticizer from the surface layer of the thermoplastic. The next step is to apply an electrochemical deposition of a shielding layer to the shell. This technology is possible due to the fact that the external black-filled layer of the shell is electrically conductive (specific volume electrical resistance of 10-10 (ΩS and can serve as an electrode for the deposition of metals. The process is conducted in an acid electrolyte of the following composition: 2OO 250 g / l of copper vitriol and 5O -70 g / l of sulfuric acid at a current density of 1-2) lO a / mm - Copper deposited in soot-bonded polymer jellum forms a shielding core layer. Thus, the proposed method of fabricating shielding cable ensures a high reliability of shielding; small metal consumption and long-term operability of the shielding layer embedded in a polymer matrix; improving the electrical insulation of the cable due to the presence of dielectric dispersion liquids to the shell, which also give the jacket elasticity and frost resistance. a cable with a metallized sheath, consisting in applying a plasticized thermoplastic to the core followed by a metal Llization, so that, in order to increase the reliability of shielding and to reduce metal consumption, after applying a thermoplastic, it is plasticized in a heated liquid-phase plasticizer, followed by cooling to gel formation, after which the transfusion filter is washed out thermoplastic spos and electrochemically deposited metallized layer. - Sources of information taken into account in the examination: 1. K. Nikolsky and others. Installation of communication cables with plastic shells. M, Sv z, 1969 .: 2. Patent of Great Britain No. 886417, cl. 36 A, 1958.