Method for producing a coating layer made of expandable and cross-linkable material in a cable
US7790222B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2002 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Apr 29, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2301/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a cable including at least one transmissive element, for example, an element transmitting electrical energy or optionally optical signals as well, and an expanded and cross-linked coating layer in a radially outer position with respect to the at least one transmissive element, the coating layer having a composition including an expandable and cross-linkable polymeric material. The method includes a) extruding the composition; b) forming a coating layer made of expandable and cross-linkable polymeric material with the composition thus extruded; c) expanding the coating layer made of expandable and cross-linkable polymeric material; and d) cross-linking the coating layer made of expandable and cross-linkable polymeric material. The expanding and cross-linking steps c) and d) are carried out by heating the coating layer made of expandable and cross-linkable polymeric material at atmospheric pressure by means of a suitable heating fluid. Savings in production time and costs are attained by the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.