EoW March 2008

191 / 240

189
EuroWire – March 2008
wire
31 March-04 April
Solvay Specialty Polymers can provide
materials with outstanding performance to
guarantee all the standards required.
In the company portfolio there are
fluoropolymers and crosslinkable LS0H
technopolymers to cover all the needs of
this market.
Fluoropolymers deliver more stable electrical
performance when exposed to thermal
cycling and humidity than traditional wire
and cable polymers, while technopolymers
show good mechanical, thermal and flame
retardant properties.
Solvay Specialty Polymers’ family of
fluoromaterials, Hyflon®, Halar®, Solef® and
Hylar® also has a unique balance of the highest
chemical resistance, extreme temperature
performance, and high mechanical and
flex strength.
This, along with a tailored processability,
makes them a natural choice for cable
designers to meet their demanding require-
ments in diverse markets such as automotive,
avionics/military, consumer electronics, as
well as oil and gas.
Solvay's long lists of patents include innovative
technologies from cross-linkable PVDF to a
foaming and smoke suppressant packages.
In telecommunications, two of the most
important factors in cable design are electrical
and signal performance.
The dissipation factor, dielectric constant and
dielectric strength of the polymer selected
for insulation determines the cable’s ability to
transmit an electrical current or signal.
But not all fluoromaterials provide equivalent
performance. The Hyflon F series such as
MFA 1041 offers enhanced electrical perfor-
mance over FEP as it is more crystalline, thus
imparting a lower dissipation factor.
From the fire safety side, fluoropolymers offer
the highest fire protection for fire codes in
Europe, USA, and the developing codes in
Asia.
In high occupancy buildings such as a school
or hospital where a higher level of fire safety
is desired the Construction Product Directive
B1 class is the best option. The B1 classification
cannot be met without fluoropolymers.
Algoflon® PTFE is used in high frequency
telecommunications, automotive, and
aerospace applications. Where increased
flexibility with chemical resistance and high
temperatures is required, Tecnoflon FKM
fluoroelastomers are an ideal choice for
power cables, appliance wire, electrical
interconnect solutions, and as a replacement
for silicone elastomers.
The technopolymer portfolio offers Cogegum®
GFR/325, a new reference for single and
multicore H07ZZ and fire resistant cables, and
Cogegum GFR/340, which is used for heat
resistant flame retardant cables, thanks to its
high thermo mechanical resistance.
It allows high flexibility, high extrusion speed
on conventional extrusion lines and fast
ambient curing.
Other materials are Cogenum GFR/365, a new
generation of cross-linkable LS0H compound
for sheathing and insulation purposes, used
in applications like railway rolling stock,
off-shore platforms and shipboard wiring
and Polidiemme® G/450, an extra flexible
elastomer-based crosslinkable compound,
‘ambient curing’ and environment-friendly
for power, special and very flexible cable
insulation and sheathing, used in industrial,
immersion water pump, EPDM and EPR
cables.
Solvay Specialty Polymers – USA
Fax: +1 713 525 7891
Email:
Website:
For 75 years August Strecker GmbH & Co KG
in Limburg, Germany, has beenmanufacturing
buttwelding machines for the wire and cable
industry.
An example of the wide-spread production
programme includes electric buttwelders
for ripped bars, as well as other steel grades
up to high carbon steel or alloyed steel,
suitable for joining the ends of hanging
wire coils.
There are different machine executions which
allow easy mobility of the welder.
In case there is only one work station for
welding in the line, there are two options:
To weld re-bars at special horizontal
pay-offs it is possible to use a slewable
welder fixed to a column (see picture)
•
To weld steel with high carbon content
at horizontal pay-offs there are butt-
welding machines movable on flange
wheels and rails
However, if there are several welding
stations along the line of a horizontal pay-
off, it is recommended to consider having
a buttwelding machine with a platform
parallel to the line, as well as on the platform
itself, both motions on flange wheels in
matching rails.
Here the welder can be brought close to
coil rings, eg wire ends to be joined,
and out of the line, again after the welding
process.
For not having to straighten the wire
ends prior to welding, the welders’ design
allows hydraulic clamping of the material in
the coil radius.
Depending on the requirements of the
individual steel quality, the machines can be
equipped with different annealing options,
eg programmable microprocessor-controls
for stepless adjustment of capacities and
times for welding and annealing, etc.
August Strecker GmbH & Co KG
– Germany
Fax: +49 6431 44221
Email:
Website:
•
August Strecker
GmbH & Co KG
10 A21
The Type 3a slewable buttwelding machine,
mounted on a column
▲
➣➢➣