Accession Number:

AD0656229

Title:

EXPERIMENTAL RESULTS OF CELLULAR DIELECTRICS FOR TELECOMMUNICATION CABLES,

Descriptive Note:

Corporate Author:

PIRELLI SPA MILAN (ITALY)

Personal Author(s):

Report Date:

1959-01-01

Pagination or Media Count:

11.0

Abstract:

The use of c.p. as telephone wire insulation seems advisable provided that the insulation thickness is higher than 0.24 in. and the ratio insulation diameterconductor diameter higher than 2. From this limitation derives that a good field of application seems to be that of the trunk cables. Satisfactory results are obtained in the manufacture of small coaxials for telephone systems with transistor repeaters. For the extrusion control the capacitance monitor with tubolar air probe has proved to be useful and convenient. Stress cracking in too high melt index compound is well shown by soapy water tests. The first tests seem to suggest that with low pressure polyethylene a better dispersion on the cells and consequently a greater expansion and a lower permittivity can be obtained. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Miscellaneous Materials
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE