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Master Bond adhesives

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Celanese Crastin® SK643FR BK851 PBT-GF20FR(17)
Categories: Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT); Polybutylene Terephthalate (PBT), Glass Fiber Filled, Flame Retardant
Material Notes: 20% Glass Reinforced, Flame Retardant, Polybutylene Terephthalate

Former DuPont product acquired by Celanese in 2022.
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Density 1.63 g/ccISO 1183
Water Absorption 0.32 %
@Thickness 2.00 mm		Sim. to ISO 62
Moisture Absorption 0.130 %
@Thickness 2.00 mm		Sim. to ISO 62
Viscosity Number 100 cm³/gISO 307, 1157, 1628
Linear Mold Shrinkage, Flow 0.0050 cm/cmISO 294-4, 2577
 0.0060 cm/cmannealed; ISO 294-4
Linear Mold Shrinkage, Transverse 0.012 cm/cmISO 294-4, 2577
 0.0145 cm/cmannealed; ISO 294-4
Melt Flow 4.0 g/10 min
@Load 2.16 kg,
Temperature 250 °C		cm³/10min Volumetric; ISO 1133
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength at Break 110 MPaISO 527-1/-2
Elongation at Break 2.8 %ISO 527-1/-2
Tensile Modulus 8300 MPaISO 527-1/-2
Flexural Strength 165 MPaISO 178
Poissons Ratio 0.34
Charpy Impact Unnotched 50.0 kJ/m²
@Temperature 23.0 °C		ISO 179/1eU
Charpy Impact, Notched 7.60 kJ/m²
@Temperature 23.0 °C		ISO 179/1eA
 
Electrical PropertiesOriginal ValueComments
Comparative Tracking Index 225 VIEC 60112
 
Thermal PropertiesOriginal ValueComments
Melting Point 225 °C10°C/min; ISO 11357-1/-3
Deflection Temperature at 1.8 MPa (264 psi) 200 °CISO 75-1/-2
Glass Transition Temp, Tg 55.0 °C10°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 32 %ISO 4589-1/-2
 
Processing PropertiesOriginal ValueComments
Melt Temperature 250 °COptimum, Injection
 240 - 260 °CRange, Injection
Mold Temperature 80.0 °COptimum, Injection
 30.0 - 130 °CInjection
Ejection Temperature 170 °CInjection
Drying Temperature 120 °CInjection
Dry Time 2.00 - 4.00 hourInjection, Dehumidified Dryer
Moisture Content <= 0.040 %Injection
Hold Pressure >= 60.0 MPaInjection
 
Descriptive Properties
AdditivesFlame retardant
Back pressureAs low as possible
Drying RecommendedyesInjection
FMVSS ClassDNIISO 3795 (FMVSS 302)
Part Marking Code>PBT-GF20FR(17)<ISO 11469
PolymerPBT-GF20 FR(17)
Processing Hold Pressure Time (s/mm)3Injection
Resin IdentificationPBT-GF20FR(17)ISO 1043

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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