Covestro Makroblend® EL 703 Polycarbonate + Polyester-based Blend, Impact Modified, Flame-Retardant, UV Stabilized

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Covestro Makroblend® EL 703 Polycarbonate + Polyester-based Blend, Impact Modified, Flame-Retardant, UV Stabilized
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate/PET Polyester Blend; Polyester, TP; Polyethylene Terephthalate (PET)
Material Notes:	(PC+PET) blend; unreinforced; flame-retardant; UV-stabilized; impact modified; high flow; injection molding grade. Good impact strength, dimensional stability and chemical resistance. Uses include outdoor electrical enclosures. UL746C f1 rated. As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and officially adopted its new name – Covestro.
Key Words:	PC
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Physical Properties	Original Value	Comments

Density	1.30 g/cc	ISO 1183-1
Moisture Absorption at Equilibrium	0.20 %	50% RH; ISO 62
Water Absorption at Saturation	0.50 %	ISO 62
Linear Mold Shrinkage	0.0060 - 0.0080 cm/cm	b.o. ISO 2577
Melt Flow	33.8 g/10 min @Load 5.00 kg, Temperature 270 °C	ISO 1133

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	55.0 MPa	50 mm/min; ISO 527-1/2
Tensile Strength, Yield	56.0 MPa	50 mm/min; ISO 527-1/2
Elongation at Break	100 %	50 mm/min; ISO 527-1/2
Elongation at Yield	4.5 %	50 mm/min; ISO 527-1/2
Tensile Modulus	2.30 GPa	50 mm/min; ISO 527-1/2
Flexural Strength	83.0 MPa	2 mm/min; ISO 527-1/2
Flexural Yield Strength	71.0 MPa	3.5% strain, 2 mm/min; ISO 178
Flexural Modulus	2.25 GPa	2 mm/min; ISO 178
Izod Impact, Notched (ISO)	15.0 kJ/m² @Temperature -30.0 °C	ISO 180-A
	50.0 kJ/m² @Temperature 23.0 °C	ISO 180-A
Charpy Impact, Notched	5.00 J/cm² @Temperature -30.0 °C	ISO 179 1eA
	8.30 J/cm² @Temperature 23.0 °C	ISO 179 1eA

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm	IEC 60093
Surface Resistance	1.00e+16 ohm	IEC 60093
Dielectric Constant	3.3 @Frequency 1e+6 Hz	IEC 60250
	3.5 @Frequency 100 Hz	IEC 60250
Dielectric Strength	34.0 kV/mm @Thickness 1.00 mm	IEC 60243-1
Dissipation Factor	0.0030 @Frequency 100 Hz	IEC 60250
	0.020 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	200 V	Solution A; IEC 60112

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	70.0 µm/m-°C @Temperature 23.0 - 55.0 °C	ISO 11359-1,-2
CTE, linear, Transverse to Flow	80.0 µm/m-°C @Temperature 23.0 - 55.0 °C	ISO 11359-1,-2
Thermal Conductivity	2.00 W/m-K	cross-flow; ISO 8302
Deflection Temperature at 0.46 MPa (66 psi)	119 °C	ISO 75-1,-2
Deflection Temperature at 1.8 MPa (264 psi)	96.0 °C	ISO 75-1,-2
Vicat Softening Point	132 °C @Load 5.10 kg	120°C/h; ISO 306
UL RTI, Electrical	105 °C @Thickness 1.50 mm	UL 746B
UL RTI, Mechanical with Impact	90.0 °C @Thickness 1.50 mm	UL 746B
UL RTI, Mechanical without Impact	105 °C @Thickness 1.50 mm	UL 746B
Flammability, UL94	V-0 @Thickness 1.50 mm
	V-0 @Thickness 3.00 mm
	5VA @Thickness 3.00 mm

Processing Properties	Original Value	Comments
Melt Temperature	270 °C	Injection; ISO 294
Mold Temperature	70.0 °C	Injection; ISO 294
Injection Velocity	200 mm/sec	ISO 294

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