Celanese Crastin® BM6450XD BK560 PBT-F

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Celanese Crastin® BM6450XD BK560 PBT-F
Categories:	Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT)
Material Notes:	Unreinforced Polybutylene Terephthalate Developed for Blow Molding Former DuPont product acquired by Celanese in 2022.
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Physical Properties	Original Value	Comments

Density	1.21 g/cc	ISO 1183
Melt Density	1.03 g/cc
Linear Mold Shrinkage, Flow	0.015 cm/cm	ISO 294-4, 2577
	0.0010 cm/cm @Treatment Temp. 80.0 °C, Time 173000 sec	Postmolding shrinkage; ISO 294-4
Linear Mold Shrinkage, Transverse	0.017 cm/cm	ISO 294-4, 2577
	0.0015 cm/cm @Treatment Temp. 80.0 °C, Time 173000 sec	Postmolding shrinkage; ISO 294-4

Mechanical Properties	Original Value	Comments
Tensile Strength, Yield	34.0 MPa	ISO 527-1/-2
Elongation at Break	>= 50 %	Nominal; ISO 527-1/-2
Elongation at Yield	9.0 %	ISO 527-1/-2
Tensile Modulus	1600 MPa	ISO 527-1/-2
Flexural Strength	50.0 MPa	ISO 178
Flexural Modulus	1600 MPa	ISO 178
Poissons Ratio	0.42
Izod Impact, Notched (ISO)	10.0 kJ/m² @Temperature -40.0 °C	ISO 180/1A
	90.0 kJ/m² @Temperature 23.0 °C	ISO 180/1A
Charpy Impact Unnotched	NB @Temperature -30.0 °C	ISO 179/1eU
	NB @Temperature 23.0 °C	ISO 179/1eU
Charpy Impact, Notched	8.00 kJ/m² @Temperature -40.0 °C	ISO 179/1eA
	10.0 kJ/m² @Temperature -30.0 °C	ISO 179/1eA
	120 kJ/m² @Temperature 23.0 °C	ISO 179/1eA

Electrical Properties	Original Value	Comments
Volume Resistivity	>= 1.00e+15 ohm-cm	IEC 62631-3-1
Surface Resistance	>= 1.00e+15 ohm	IEC 62631-3-2
Dielectric Strength	31.0 kV/mm	IEC 60243-1
Dissipation Factor	0.0070 @Frequency 100 Hz	IEC 62631-2-1
	0.020 @Frequency 1e+6 Hz	IEC 62631-2-1

Thermal Properties	Original Value	Comments
Specific Heat Capacity	2.21 J/g-°C	Melt
Thermal Conductivity	0.150 W/m-K	Melt
Melting Point	220 °C	10°C/min; ISO 11357-1/-3
Deflection Temperature at 0.46 MPa (66 psi)	80.0 °C	ISO 75-1/-2
	130 °C	Annealed; ISO 75-1/-2
Deflection Temperature at 1.8 MPa (264 psi)	50.0 °C	ISO 75-1/-2
Flame Spread	40.0 mm/min @Thickness 1.00 mm	ISO 3795 (FMVSS 302)

Processing Properties	Original Value	Comments
Melt Temperature	235 - 260 °C	Range, Extrusion
	240 - 260 °C	Range, Blow Molding
Drying Temperature	120 °C	Injection
	110 - 130 °C	Blow Molding
	110 - 130 °C	Extrusion
Dry Time	2.00 - 4.00 hour	Blow Molding, Dehumidified Dryer
	2.00 - 4.00 hour	Extrusion, Dehumidified Dryer
	2.00 - 4.00 hour	Injection, Dehumidified Dryer
Moisture Content	<= 0.040 %	Blow Molding
	<= 0.040 %	Extrusion
	<= 0.040 %	Injection

Descriptive Properties
Additives	Release agent
Back pressure	As low as possible
Drying Recommended	yes	Blow Molding
	yes	Injection
FMVSS Class	B	ISO 3795 (FMVSS 302)
Part Marking Code	>PBT-F<	ISO 11469
Polymer	PBT
Resin Identification	PBT-F	ISO 1043

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PDSX5004 / 197644

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