Silicone line

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Silicone lines and silicone cables are lines or cables that are insulated with silicone rubber . They are primarily suitable for use in particularly high as well as particularly low ambient temperatures.

properties

A silicone mixture is used to insulate the individual wires as well as the cable sheathing. Silicone rubber can withstand high temperatures without melting. Silicone rubber does not become hard and brittle in the cold. The operating temperature range is z. B. at -50… 180 ° C, briefly 200 ° C.

The copper conductors of silicone lines are usually tinned to avoid oxidation at the elevated temperatures. Solid wires or litz wires are used.

Silicone cables are halogen-free and can therefore be used in public buildings.

A problem with silicone-insulated cables is the comparatively low notch strength of the rubber.

use

Among other things, silicone cables are used in the low-voltage area:

  • at elevated temperatures (steel works, shipbuilding, welding shops, kitchen stoves)
  • if contact with hot surfaces can occur (sauna stoves, lights, thermocouple cables)
  • at low temperatures (aircraft construction)

Silicone cables can replace other heat-resistant cables whose insulation is complex or problematic (asbestos fabric, ceramic beads, textile fabric).

Alternatives

  • Ceramic can withstand up to 1000 ° C and is still used, but is inflexible
  • Glazes (so-called "ceramic-insulated" wires or ceramic wires) have a nickel-plated copper conductor (up to 500 ° C)
  • Polytetrafluoroethylene (PTFE, Teflon TM , up to 260 ° C) is not very flexible, not halogen-free and expensive, it is used fully or as a bandage, the conductor material is often silver-plated copper
  • Ethylene-tetrafluoroethylene copolymer (ETFE, Tefzel TM , up to 150 ° C) is not halogen-free and may be used. a. used for wire wrap wire (tinned solid wire as conductor)
  • Radiation- crosslinked thermoplastics (e.g. polyvinyl chloride , polyolefin (Betatherm145, XLS, halogen-free), polyethylene (PEXc, halogen-free)) are increasingly becoming alternatives to silicone rubber, but they are less elastic. * Special polyurethane can also be crosslinked by radiation and is then highly flexible, notch-resistant, halogen-free and heat-resistant.

Individual evidence

  1. ↑ Data sheet for a silicone cable. In: UILapp GmbH / Stuttgart. Retrieved April 21, 2017 .
  2. ↑ http://www.ceteletric.com/faq_deu.htm#11 Website of the company Cet Eletric / Italy
  3. ↑ Winding wires with ceramic insulation from Schupp. In: schupp.ch. Retrieved October 15, 2014 .
  4. ↑ http://www.dx-wire.de/lng/en/wire-cable/ptfe-teflon-litz-and-wires/ptfe-teflon-litz-awg18.html?xploidID=4c8880a365b5dea2d768bf60ba1a86fd Website Technischer Handel Bogner / Röslau (Germany)
  5. ↑ https://www.chemours.com/Teflon_Industrial/en_US/products/product_by_name/tefzel_etfe/index.html Chemours website
  6. ↑ http://www.synflex.com/download/produkte/de/synflex_litzen-schlussleitungen_betatherm-145-ul.pdf Betatherm145 from Leoni AG / Switzerland
  7. ↑ Radiation-crosslinked olefin copolymer from UILapp GmbH