WCA November 2018

Technology news

❍ Critical conditions caused by high ambient temperature and mechanical stresses can arise during cable storage

An advanced HFFR solution

high temperature has been taken as the key parameter. The value of tear resistance for Cogegum AFR 1602 UV, measured according to BS 6469-99.1:1992, is already higher at ambient temperature, but it is at high temperature that the difference with the standard material is dramatically improved. In terms of performance, this translates into a high toughness when the material undergoes severe thermal and mechanical stresses. In this regard, performances obtained by Cogegum AFR 1602 UV are comparable with those typical of a crosslinked material. Cogegum AFR 1602 UV complies with BS LTS1, 2, 3, 4, IEC 60502-1 ST8 and IEC 60092 SHF1 norms, and is easily processable on standard equipment for thermoplastic materials. Moreover, it contains a UV stabiliser system to guarantee the mechanical performance of the material during its service life. For cable producers and installers, this material is a ready-to-use solution for the production of armoured cables, avoiding cracking of stored cables, damage during installation and delays in plant start-up. Padanaplast – Italy Website : www.padanaplast.com

IN harsh service conditions, where mechanical stresses and the possibility of damage during laying and digging activities can occur, a metallic armour is applied under the jacket of cables to confer extra mechanical protection. Critical conditions caused by high ambient temperature and mechanical stresses can also arise during cable storage. This is especially true for black cables stored under the sun, when the actual temperature on the jacket can rise to 60-70°C, determining an important thermal expansion of the metallic armour; an indentation occurs on the inner surface of the jacket, promoting tearing of the protective outer layer that normally cannot be repaired. Unfortunately, HFFR materials usually can be more prone to this issue due to their high filler loading, necessary to guarantee good fire performance. Thus, during material development all these aspects must be taken into account, to ensure that the jacket will not crack during storage and laying, while maintaining all the other properties required. For this reason, Padanaplast developed Cogegum ® AFR 1602 UV, an innovative thermoplastic HFFR material specifically designed as the solution to these tough conditions. In this perspective, the tear resistance at

ROD BREAKDOWN & WIRE DRAWING MACHINES SINGLE & DOUBLE TWIST BUNCHING MACHINES STRANDING MACHINES EXTRUDERS TAKE-UPS / PAY-OFFS / STATIC COILERS ACCESSORIES Tecnologĺa del Cable y Aluminio S. L. Since 1973 the best option in machinery, equipment & accessories for the wire and cable industry.

C/ Progrés nº28, nave 3 – Pol Ind. Sant Ermengol 08630 – Abrera - Barcelona – SPAIN Tel. +34 93 770 44 02 Fax +34 93 770 11 92 tecalsa@tecalsa.eu – http://www.tecalsa.eu

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Wire & Cable ASIA – November/December 2018

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