Covestro Makroblend® UT250 HR PC+PET

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Covestro Makroblend® UT250 HR PC+PET
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate/PET Polyester Blend
Material Notes:	(PC+PET)-blend, impact modified, improved hydrolysis resistance compared to standard Makroblend UT grades, injection molding grade. Good low-temperature impact strength, flowability, and chemical resistance. Applications include lead-acid battery housings. Information provided by Covestro
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Physical Properties	Original Value	Comments

Density	1.215 g/cc	ISO 1183-1
Moisture Absorption at Equilibrium	0.16 %	ISO 62
Water Absorption at Saturation	0.50 %	ISO 62
Linear Mold Shrinkage	0.0060 - 0.0080 cm/cm	600 bar; b.o. ISO 2577
Melt Flow	22 g/10 min @Temperature 270 °C	ISO 1133

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	57.0 MPa	50 mm/min; ISO 527-1,-2
Tensile Strength, Yield	55.0 MPa	50 mm/min; ISO 527-1,-2
Elongation at Break	110 %	50 mm/min, Nominal; ISO 527-1,-2
Elongation at Yield	4.9 %	50 mm/min; ISO 527-1,-2
Tensile Modulus	2200 MPa	1 mm/min; ISO 527-1,-2
Flexural Strength	82.0 MPa	2 mm/min; ISO 178
Flexural Yield Strength	68.0 MPa @Strain 3.5 %	2 mm/min; ISO 178
Flexural Modulus	2200 MPa	2 mm/min; ISO 178
Izod Impact, Notched (ISO)	40.0 kJ/m² @Temperature -30.0 °C	ISO 7391/b.o. ISO 180-A
	60.0 kJ/m² @Temperature 23.0 °C	ISO 7391/b.o. ISO 180-A
Izod Impact, Unnotched (ISO)	NB @Temperature 23.0 °C	ISO 180-1C
	NB @Temperature -30.0 °C	ISO 180-1C
Charpy Impact Unnotched	NB @Temperature 23.0 °C	ISO 179-1eU
	NB @Temperature -30.0 °C	ISO 179-1eU
Charpy Impact, Notched	35.0 kJ/m² @Temperature -30.0 °C	ISO 179-1eA
	65.0 kJ/m² @Temperature 23.0 °C	ISO 179-1eA
Impact	4300 @Temperature 23.0 °C	[N], Puncture Max Force; ISO 6603-2
	5300 @Temperature -30.0 °C	[N], Puncture Max Force; ISO 6603-2
Puncture Energy	45.0 J @Temperature 23.0 °C	ISO 6603-2
	47.0 J @Temperature -30.0 °C	ISO 6603-2

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	75.0 µm/m-°C @Temperature 23.0 - 55.0 °C	ISO 11359-1,-2
CTE, linear, Transverse to Flow	75.0 µm/m-°C @Temperature 23.0 - 55.0 °C	ISO 11359-1,-2
Thermal Conductivity	1.39 BTU-in/hr-ft²-°F	cross-flow; ISO 8302
Deflection Temperature at 0.46 MPa (66 psi)	123 °C	ISO 75-1,-2
Deflection Temperature at 1.8 MPa (264 psi)	102 °C	ISO 75-1,-2
Vicat Softening Point	137 °C @Load 5.10 kg	120°C/h; ISO 306
Flammability, UL94	HB @Thickness 1.50 mm
	HB @Thickness 0.750 mm

Processing Properties	Original Value	Comments
Melt Temperature	270 °C	ISO 294
Mold Temperature	70.0 °C	ISO 294
Drying Temperature	110 °C	ISO 294
Dry Time	4.00 hour	ISO 294

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