Borealis Visico™ FR4451/LE4439 Polyethylene, Silane Crosslinkable Insulation Compound

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Borealis Visico™ FR4451/LE4439 Polyethylene, Silane Crosslinkable Insulation Compound
Categories:	Polymer; Thermoplastic; Polyethylene (PE)
Material Notes:	Visico FR4451/LE4439 is a natural UV stabilized, halogen free moisture-induced crosslinkable polyethylene compound that is designed for use in photovoltaic cables. The combination of Visico FR4451 base resin, and LE4439 catalyst, provides a highly scorch retardant compound system with excellent thermal stability and good flame retardant properties. Visico FR4451/LE4439 contains a patented scorch retardant additive that increases the processing window for a silane crosslinkable compound and minimizes the tendency for premature crosslinking in the extruder, head or die. Cable insulation with a proper mixture of Visico FR4451 (95 parts) and LE4439 (5 parts) exhibits excellent thermo-oxidative stability in contact with aluminum or copper. Visico FR4451/LE4439 can be readily pigmented to a variety of colors using standard wire & cable color concentrates designed for thermoplastic or crosslinked polyethylene. Applications: Visico FR4451/LE4439 is recommended for use as insulation and jacket of flexible single-core cables (cords) at the DC-side of photovoltaic systems with maximum permissible voltage of DC 1.5 kV. Specifications: Visico FR4451/LE4439 in combination meets the applicable requirements as below when processed using sound extrusion and testing procedure: TÜV 2 PfG 1169/08.2007; EN 50618; EN 50363-5 EI5; EN 50290-2-26 Information provided by Borealis AG
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Physical Properties	Original Value	Comments

Density	0.940 g/cc	LE4439; ISO 1872-2/ISO 1183
	1.19 g/cc	Visico FR4451; ISO 1872-2/ISO 1183
Melt Flow	0.500 g/10 min @Load 2.16 kg, Temperature 190 °C	ISO 1133
Storage Temperature	10.0 - 30.0 °C

Mechanical Properties	Original Value	Comments
Hardness, Shore D	40.0 @Time 15.0 sec	ISO 868
Tensile Strength	16.0 MPa	IEC 60811-501
Elongation at Break	<= 5.00 %	Hot Set Test (200 °C, 0,2 MPa), Permanent deformation; IEC 60811-507
	<= 5.00 %	Hot Set Test (250 °C, 0,2 MPa), Permanent deformation; IEC 60811-507
	<= 50.0 %	Hot Set Test (200 °C, 0,2 MPa), Elongation under load; IEC 60811-507
	<= 100 %	Hot Set Test (250 °C, 0,2 MPa), Elongation under load; IEC 60811-507
	400 %	IEC 60811-501
Flexural Modulus	100 MPa	ISO 178

Electrical Properties	Original Value	Comments
Volume Resistivity	>= 10.0 ohm-cm	[POcm]; IEC 60093
Dielectric Constant	<= 3.00 @Frequency 50 Hz	IEC 60250
Dielectric Strength	>= 20.0 kV/mm	IEC 60243

Thermal Properties	Original Value	Comments
Oxygen Index	32.0 %	ISO 4589-2

Processing Properties	Original Value	Comments
Zone 1	130 °C
Zone 2	140 °C
Zone 3	150 °C
Zone 4	160 °C
Zone 5	170 °C
Shelf Life	18.0 Month

Descriptive Properties
Corrosivity of combustion fumes	< 10 µS/mm	Conductivity, IEC 60754-2

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