| abstract |
TRXLPE type cable sheaths are prepared by a method, in which a solid polymer is mixed with a liquid agent resistant to water arborization by either direct dosing or injection. In the dosing method, the solid polymer, for example, high pressure LDPE, is atomized or otherwise contacted with the liquid agent, for example, PEG, the agent is allowed to absorb into the polymer, and the polymer with The absorbed agent is then fed to an extrusion apparatus for extrusion on a wire or optical fiber with sheath or without sheath. In the direct injection method, the solid polymer is first fed to an extrusion apparatus, and the liquid agent is atomized or otherwise contacted with the polymer before the two are mixed with each other through the action of the mixing elements of the device. |