Crastin® SK643FR BK851

About
20% Glass Reinforced, Flame Retardant, Polybutylene Terephthalate&&

Product Description
SupplierDuPont
Genericpolybutylene terephthalate
Material StatusCommercial: Active
FeaturesFlame Characteristics,V-0
AvailabilitysAfrica & Middle East ,North America,Latin America,Asia Pacific,Europe

Technical Data
MECHANICALNominal valueUnitTest method
Tensile modulus8300MPaISO 527-2
tensile strength
fracture110MPaISO 527-2
Tensile strain
fracture2.8%ISO 527-2
bending strength165MPaISO 178

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength
23℃7.6kJ/m²ISO 179/1eA
Charpy Unnotch Impact strength
23℃50kJ/m²ISO 179/1eU

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed200ISO 75-2/A
Melting temperature225ISO 11357-3

Electrical performanceNominal valueUnitTest method
Compared to the leakage tracing index225VIEC 60112

FLAME CHARACTERISTICSNominal valueUnitTest method
Flame retardant level UL 94
0.75 mmV-0 UL 94
1.50 mmV-0 UL 94
Flammability level IEC 60695-11-10, -20
0.75 mmV-0 IEC 60695-11-10, -20
1.5 mmV-0 IEC 60695-11-10, -20
Extreme oxygen index32%ISO 4589-2
FMVSS flame retardant ratingDNI FMVSS 302

PHYSICALNominal valueUnitTest method
Density1.63g/cm³ISO 1183
Shrinkage rate ISO 294-4
TD1.5%ISO 294-4
TD1.2%ISO 294-4
MD0.50%ISO 294-4
MD0.60%ISO 294-4
Water absorption rate
Saturation, 23 ℃, 2.00 mm0.32%ISO 62
Equilibrium, 23 ℃, 50% RH, 2.00 mm0.13%ISO 62
Ejection temperature170

Process Conditions
injectionNominal valueUnitTest method
Drying temperature120°C
Drying time – hot air dryer2.0 to 4.0hr
Recommended maximum moisture content0.040%
Processing (melt) temperature240 to 260°C
Melt Temperature, Optimum250°C
Mold temperature30 to 130°C
Mold Temperature, Optimum80°C
Hold pressure60.0MPa
Back pressureAs low as possible 
Drying Recommendedyes 
Hold Pressure Time3.00s/mm

Notes
1. Typical properties: these are not to be construed as specifications.
2. Annealed
3. 10°C/min
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