Physical foaming of telephone wires – an economical way for telephone cable manufacturing

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This paper presents a new processing technology to manufacture telephone wires by physical foaming rather than chemical foaming, as is current practice. The target of the development was to create a process that will reach accepted production speeds of foam/skin manufacturing with greater expansion rates of the foam, yet maintaining a consistent capacitance level. These targets are possible with the new ‘Extrucell’ (TM) process.

Description

This paper presents a new processing technology to manufacture telephone wires by physical foaming rather than chemical foaming, as is current practice. The target of the development was to create a process that will reach accepted production speeds of foam/skin manufacturing with greater expansion rates of the foam, yet maintaining a consistent capacitance level. These targets are possible with the new ‘Extrucell’ (TM) process.

Additional information

Author(s)

Jouni Heinonen, Nokia-Maillefer, Switzerland.

Publication/Event/Pages

Paper presented at WAI 60th Annual Convention, Boston, MA USA. Paper published in Wire Journal International, Nov, 1990, pg. 46.

Year

1990