摘要:
A water blocking thixotropix hydrophobic compound for cables comprises a synthetic oil or a mixture of synthetic and mineral oils thickened to a gel by the addition of silica or bentonite. The gel properties of the compound may be temporarily removed by mechanical shearing to allow filling of a cable. An apparatus for cable filling is also described.
摘要:
An optical fiber telecommunication cable according to the invention, in order to protect the optical fibers from hydrogen, comprises a mixture formed by molybdenum trioxide and a catalyst. This mixture, independent of the manner in which the same is embedded in the cable, chemically blocks on itself the hydrogen.
摘要:
@ Telecommunications cable and method for its manufacture, the cable having two covering layers (28, 30) surrounding a core, each layer being a sheating or jacketing layer, and in which a water blocking layer (34) lies between the tow covering layers. The water blocking layer comprises a wrapping (36) of flexible and compressible powder pegnable material which is impregnated throughout its thickness with a powder (38) which contacts the outer surface of the inner layer and the inner surface of the outer layer. The powder is non-swellable and forms a viscous water blocking solution when in contact with water.
摘要:
Dielectric compositions comprising ethylene polymers which are susceptible to electrical breakdown by water treeing are protected against such breakdown by the incorporation therein of organo silanes.
摘要:
A polyolefin series resin composition for water-tree retardant electric insulation which comprises a polyolefin series resin and an organic isocyanate compound having at least one isocyanate radical in the molecule, or said po-. lyolefin series resin, said organic isocyanate compound and an organic peroxide.