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Ensinger PEI

DuPont Mobility and Materials Crastin® SK642FR NC010 Polybutylene Terephthalate (PBT)  (discontinued **)
Categories: Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT); Polybutylene Terephthalate (PBT), 20% Glass Fiber Filled
Material Notes: 15% Glass Reinforced Flame Retardant Polybutylene Terephthalate

Crastin SK642FR is a 15% glass fibre reinforced flame retardant polybutylene terephthalate for injection moulding.It has a UL94 V-0 rating @ 1.5mm.

While this product line has been acquired by Celanese, this specific grade had been disconued while still a DuPont product so it is listed here as a discontinued DuPont product.
Key Words: PBT-GF15FR(17)
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Physical PropertiesMetricEnglishComments
Density 1.37 g/cc0.0495 lb/in³
 1.58 g/cc0.0571 lb/in³ISO 1183
Water Absorption 0.33 %
@Thickness 2.00 mm		0.33 %
@Thickness 0.0787 in		Sim. to ISO 62
Moisture Absorption 0.140 %
@Thickness 2.00 mm		0.140 %
@Thickness 0.0787 in		Sim. to ISO 62
Viscosity  102700 cP
@Shear Rate 5000 1/s,
Temperature 260 °C		102700 cP
@Shear Rate 5000 1/s,
Temperature 500 °F		ISO 11403-1 -2
 122300 cP
@Shear Rate 5000 1/s,
Temperature 250 °C		122300 cP
@Shear Rate 5000 1/s,
Temperature 482 °F		ISO 11403-1 -2
 147800 cP
@Shear Rate 5000 1/s,
Temperature 240 °C		147800 cP
@Shear Rate 5000 1/s,
Temperature 464 °F		ISO 11403-1 -2
 310520 cP
@Shear Rate 500 1/s,
Temperature 260 °C		310520 cP
@Shear Rate 500 1/s,
Temperature 500 °F		ISO 11403-1 -2
 375900 cP
@Shear Rate 500 1/s,
Temperature 250 °C		375900 cP
@Shear Rate 500 1/s,
Temperature 482 °F		ISO 11403-1 -2
 460190 cP
@Shear Rate 500 1/s,
Temperature 240 °C		460190 cP
@Shear Rate 500 1/s,
Temperature 464 °F		ISO 11403-1 -2
Linear Mold Shrinkage, Flow 0.0070 cm/cm0.0070 in/inISO 294-4 2577
 0.0080 cm/cm0.0080 in/inannealed; ISO 294-4
Linear Mold Shrinkage, Transverse 0.012 cm/cm0.012 in/inISO 294-4 2577
 0.015 cm/cm0.015 in/inannealed; ISO 294-4
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength at Break 100 MPa14500 psiISO 527-1/-2
Elongation at Break 3.4 %3.4 %ISO 527-1/-2
Tensile Modulus 7.20 GPa1040 ksiISO 527-1/-2
Flexural Strength 155 MPa22500 psiISO 178
Izod Impact, Notched (ISO) 7.00 kJ/m²3.33 ft-lb/in²ISO 180/1A
 6.00 kJ/m²
@Temperature -30.0 °C		2.86 ft-lb/in²
@Temperature -22.0 °F		ISO 180/1A
Izod Impact, Unnotched (ISO) 33.0 kJ/m²15.7 ft-lb/in²ISO 180/1U
 32.0 kJ/m²
@Temperature -30.0 °C		15.2 ft-lb/in²
@Temperature -22.0 °F		ISO 180/1U
Charpy Impact Unnotched 5.30 J/cm²25.2 ft-lb/in²ISO 179/1eU
 4.40 J/cm²
@Temperature -30.0 °C		20.9 ft-lb/in²
@Temperature -22.0 °F		ISO 179/1eU
Charpy Impact, Notched 0.800 J/cm²3.81 ft-lb/in²ISO 179/1eA
 0.710 J/cm²
@Temperature -30.0 °C		3.38 ft-lb/in²
@Temperature -22.0 °F		ISO 179/1eA
Tensile Creep Modulus, 1 hour 6000 MPa
@Time 3600 sec		870000 psi
@Time 1.00 hour		ISO 899-1
Tensile Creep Modulus, 1000 hours 4800 MPa
@Time 3.60e+6 sec		696000 psi
@Time 1000 hour		ISO 899-1
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+15 ohm-cm>= 1.00e+15 ohm-cmIEC 60093
Surface Resistance 1.00e+15 ohm1.00e+15 ohmIEC 60093
Dielectric Constant  3.5
@Frequency 1e+6 Hz		3.5
@Frequency 1e+6 Hz		IEC 60250
 3.7
@Frequency 100 Hz		3.7
@Frequency 100 Hz		IEC 60250
Dielectric Strength 28.0 kV/mm711 kV/inIEC 60243-1
Dissipation Factor  0.0030
@Frequency 100 Hz		0.0030
@Frequency 100 Hz		IEC 60250
 0.017
@Frequency 1e+6 Hz		0.017
@Frequency 1e+6 Hz		IEC 60250
Comparative Tracking Index 250 V250 VIEC 60112
 
Thermal PropertiesMetricEnglishComments
CTE, linear, Parallel to Flow 50.0 µm/m-°C27.8 µin/in-°FISO 11359-1/-2
CTE, linear, Transverse to Flow 110 µm/m-°C61.1 µin/in-°FISO 11359-1/-2
Specific Heat Capacity 1.74 J/g-°C0.416 BTU/lb-°F
Thermal Conductivity 0.270 W/m-K1.87 BTU-in/hr-ft²-°Fof melt
Melting Point 225 °C437 °F10°C/min; ISO 11357-1/-3
Deflection Temperature at 0.46 MPa (66 psi) 218 °C424 °FISO 75-1/-2
Deflection Temperature at 1.8 MPa (264 psi) 203 °C397 °FISO 75-1/-2
Vicat Softening Point 207 °C405 °F50°C/h 50N; ISO 306
Flammability, UL94  V-0
@Thickness 1.50 mm		V-0
@Thickness 0.0591 in		IEC 60695-11-10
 V-0
@Thickness 0.800 mm		V-0
@Thickness 0.0315 in		IEC 60695-11-10
Oxygen Index 31 %31 %ISO 4589-1/-2
 
Descriptive Properties
Delivery formPellets
Part Marking Code>PBT-GF15FR(17)<ISO 11469
ProcessingInjection Molding
Regional AvailabilityAsia Pacific
 Europe
 Global
 Near East/Africa
 North America
 South and Central America
Resin IdentificationPBT-GF15FR(17)
UL recognitionUL

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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