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Crastin® SF: Translating flow advantage into cost savings

DuPont™ Crastin® SF PBT polyester resin

Crastin® SF – A new PBT family for Super Fast (SF) injection molding

New Crastin® SF PBT products use a technology to enhance flow of the resin to extremely high levels:

  • Crastin® SF dramatically reduces manufacturing costs
  • improving productivity by up to 30%
  • reducing machine size thanks to lower filling pressure
  • reducing part thickness under standard filling conditions
  • lower energy consumption
  • wider processing window
  • lower reject rate
  • improved flow to fill moulds for thinner or more complex parts than standard PBT grades
  • Crastin® SF offers excellent property retention: stress, strain and impact, thermal stability and more
  • Crastin® SF is a direct drop-in replacement for standard PBT grades

Crastin® SF – 30% more flow!
graph showing 30% more flow using Crastin® SF

Crastin® SF – 30% less cycle time!
graph showing 30% less cycle time using Crastin® SF

Available in 3 grades…
a non-reinforced and two reinforced resins with 15% and 30% glass

PBT Unreinforced
Crastin® S610SF NC010
Crastin® S610SF BK591
PBT – 15% Glass Reinforced
Crastin® SK612SF NC010
Crastin® SK612SF BK591
PBT – 30% Glass Reinforced
Crastin® SK615SF NC010
Crastin® SK615SF BK591

What to make of it

  • Connector: Thin, complex, small parts running in high productivity tools
  • Automotive electronic components, such as sensors
  • Coil formers and solenoids
  • Structurally-complex parts for furniture
  • Motor housings

PROPERTY COMPARISON

Property Test Method Units Crastin® Crastin®
SK612SF SK602 SK615SF SK605
Mechanical
Stress at break
Strain at break
Tensile Modulus
Notched Charpy

ISO 527 - 1/-2
ISO 527 - 1/-2
ISO 527 - 1/-2
ISO 179 / 1eA

MPa
%
MPa
kJ/m²

106
3,2
5800
6

109
3,5
5800
7

145
2,5
9900
9

140
2,7
10000
10
Thermal
Temperature of deflection under load 1.8MPa

ISO 75 / AF

°C

200

200

205

205
Other
Density
Moulding shrinkage
        Normal, 2.0mm
        Parallel, 2.0mm

ISO 1183
ISO 294-4

kg/m³
%

1410

1,1
0,4

1410

1,1
0,4

1530

1,1
0,4

1530

1,1
0,3

Property Test Method Units Crastin®
S610SF
Crastin®
S600F20
Mechanical
Tensile Modulus
Stress at yield
Strain at yield
Notched Charpy

ISO 527 - 1/-2
ISO 527 - 1/-2
ISO 527 - 1/-2
ISO 179 / 1eA

MPa
MPa
%
kJ/m²

2500
56
5
4

2500
58
5
5
Thermal
Melting Temperature
Temperature of deflection under load 1.8MPa

ISO 11357
ISO 75 / AF

°C

225
50

225
50
Other
Density
Moulding shrinkage
        Normal, 2.0mm
        Parallel, 2.0mm

ISO 1183
ISO 294-4

kg/m³
%

1310

1,6
1,7

1310

1,6
1,7

Download a PDF of the DuPont™ Crastin® SF PBT polyester resin profile here.

We can help

From concept to commercialisation, DuPont can help you develop reliable, cost-saving components in Crastin® or any of our nine families of engineering polymers. Please contact the nearest DuPont representative for your country.