Mixer SpA - Lead Free EPDM Compounds for MV Cables

7/25/2019 Mixer SpA - Lead Free EPDM Compounds for MV Cables

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Lead FreeEPDM Compounds

for MV Cables

Mixer SpA, ItalyPolymers in Cables 2013 Miami, Florida


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www.mixercompounds.com 2

About Mixer

Manufacturing: Rubber compounds since 1996

exclusively for wire and cable industry

Production capacity: 65 million pounds/year

Plant location: Northern Italy

Exporting to: Over 20 countries worldwide

Product range:

o Insulation Jacketing Bedding

o For LV, MV and HV power cables

o Peroxide XL, Irradiation XL

o Halogen free, FR, Low smoke, Oil resistant


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Raw material handling - Automatic, Online, Fully Integrated

INSPECTION

FOR

ACCEPTANCE

REJECTED

ACCEPTED

TO

COMPOUNDING

LINES

Polymers

Fillers

Oil/Plasticizers

Additives

STORAGE

ANALYSIS REPORT

LABEL WITH BAR CODE

INCOMING

RAW MATERIALS


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Compounding unitsAutomatic and Fully Integrated

ACCEPTED

BARCODE LABEL

LAB ANALYSIS

REPORT

PACKAGING

& DELIVERY

POLYMERS (BALE FORM)

AUTOMATIC

TRANSPORTWEIGHING

DOSINGEXTRUSION TESTOUTPUT/PRESSURE

DISPERSIONS

SMOOTHNESS

POLYMERS

(PELLET FORM)FILLERS

OIL/PLASTICIZERS

ADDITIVES

INTERNAL

MIXER

MANUAL CUTTING, DOSING

AUTOMATIC WEIGHING

EXTRUDERFILTRATION

GRANULATION

BIG CONTINUOUS

BLENDERHOMOGENIZATION

COOLING

PEROXIDE SOAKING

PEROXIDE

SAMPLES

REJECTED


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Lead free EPDM compounds for Medium Voltage power cables

EPDM based compounds combine superior mechanical and electricalproperties and for these reasons are used in a wide variety of voltages and

applications such as: low, medium and high voltages, control and

instrumentation cables, power cords, mining cables and cable accessories.

In EPDM compound the rubber resin is mixed with other additives to

improve the mechanical and electrical properties. Lead chemicals are used as

ingredients in todays commercially available EPDM compounds for Medium

Voltage (MV) insulations as stabilizers for long lasting performances.


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Lead Free EPDM Compounds for MV cables

Currently in the European Union, Red

Lead Oxide is listed in Reach SVHC

(Substances of Very High Concern)

forcing MV cable producers to

substitute the material with a non-

leaded alternative.


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Research for the new recipe lead free

Mixer already has been producing MV cable compounds since 1996.

Main features:

Base polymers: EPR/EPDM.

Coated and uncoated mineral fillers.

Peroxide soaking process at low temperature.

Clean compounding process without contamination.

Whats new:

Stabilizer system: lead free synergistic mixture of organic and

inorganic additives with enhanced ion scavenging properties


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www.mixercompounds.com 8www.mixercompounds.com 8

Optimization for the new recipe lead free

The following parameters have been taken into consideration:

Easy dispersion and compatibility of new stabilizers into polyolefin

matrix.

Good electrical properties of new stabilizers, especially in wet

conditions. No interference between crosslinking system and lead free

stabilizing pack.

Final cost of the compound.


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Mechanical properties from compound extruded and crosslinked in laboratory


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Ageing resistance of compound extruded and crosslinked in laboratory


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Ageing resistance of compound extruded and crosslinked in laboratory


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Properties of Mixer compounds coming from MV cables extruded by EU customer


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Electr ical properties of Mixer compounds designed for use in MV/HVpower cables up to 132 kV

*Ageing conditions: Aged 136C Oven for 7 days and immersed for 2h in 100C water


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Morphology of MV LEADED compound


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Morphology of MV LEAD FREE compound


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Improvements in quality control, time, cost reductions

In the last 4 years Mixerhas:

Reduced significantly the quantity of analysis

providing big benefits in terms of time and cost reductions

Improved the quality consistency

reduction of off-spec product from 3% to


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Technical support for processing and for extrusion tools design

Collaboration with cable extrusion equipment

manufacturers/designers and cable manufacturers

to improve quality and to reduce costs thanks to

higher production speed.


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Mixer SpA has developed a MV EPDM compound that no longer

contains Lead. The material exhibits both electrical and physical

properties that are comparable to that of Leaded compounds.

Properties have been already tested on cables complying with 100%

of European specification requirements making this product availablesince 2011.

Cable manufacturers are now able to produce cables with

environmentally friendly compounds that are code compliant and

reliable, at the same final cost of traditional leaded cables.

Summary


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THANK YOU FOR YOUR

ATTENTION

Mixer SpA - Lead Free EPDM Compounds for MV Cables

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