Celanese Crastin® SK645FR BK851 PBT-GF30FR(17)

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Celanese Crastin® SK645FR BK851 PBT-GF30FR(17)
Categories:	Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT); Polybutylene Terephthalate (PBT), Glass Fiber Filled, Flame Retardant
Material Notes:	30% Glass Reinforced, Flame Retardant, Polybutylene Terephthalate Former DuPont product acquired by Celanese in 2022.
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Physical Properties	Original Value	Comments

Density	1.69 g/cc	ISO 1183
Melt Density	1.42 g/cc @Temperature 250 °C
Viscosity Number	100 cm³/g	ISO 307, 1157, 1628
Linear Mold Shrinkage, Flow	0.0040 cm/cm	ISO 294-4, 2577
Linear Mold Shrinkage, Transverse	0.012 cm/cm	ISO 294-4, 2577

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	110 MPa	ISO 527-1/-2
Elongation at Break	2.6 %	ISO 527-1/-2
Tensile Modulus	11000 MPa	ISO 527-1/-2
Flexural Strength	180 MPa	ISO 178
Poissons Ratio	0.34
Charpy Impact Unnotched	50.0 kJ/m² @Temperature -30.0 °C	ISO 179/1eU
	50.0 kJ/m² @Temperature 23.0 °C	ISO 179/1eU
Charpy Impact, Notched	8.00 kJ/m² @Temperature -30.0 °C	ISO 179/1eA
	8.00 kJ/m² @Temperature 23.0 °C	ISO 179/1eA

Electrical Properties	Original Value	Comments
Dielectric Strength	28.0 kV/mm	IEC 60243-1
Comparative Tracking Index	250 V	IEC 60112

Thermal Properties	Original Value	Comments
Melting Point	225 °C	10°C/min; ISO 11357-1/-3
Glass Transition Temp, Tg	55.0 °C	10°C/min; ISO 11357-1/-2
Flammability, UL94	V-0 @Thickness 0.750 mm	IEC 60695-11-10
	V-0 @Thickness 1.50 mm	IEC 60695-11-10
Oxygen Index	31 %	ISO 4589-1/-2

Processing Properties	Original Value	Comments
Melt Temperature	250 °C	Optimum, Injection
	240 - 260 °C	Range, Injection
Mold Temperature	80.0 °C	Optimum, Injection
	30.0 - 130 °C	Injection
Ejection Temperature	170 °C	Injection
Drying Temperature	120 °C	Injection
Dry Time	2.00 - 4.00 hour	Injection, Dehumidified Dryer
Moisture Content	<= 0.040 %	Injection
Hold Pressure	>= 60.0 MPa	Injection

Descriptive Properties
Additives	Flame retardant
Back pressure	As low as possible
Drying Recommended	yes	Injection
FMVSS Class	DNI	ISO 3795 (FMVSS 302)
Part Marking Code	>PBT-GF30FR(17)<	ISO 11469
Polymer	PBT-GF30 FR(17)
Processing Hold Pressure Time (s/mm)	3	Injection
Resin Identification	PBT-GF30FR(17)	ISO 1043

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PDSX5067 / 197707

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