Celanese Coolpoly® D4302 Thermally Conductive Polybutylene Terephthalate

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Celanese Coolpoly® D4302 Thermally Conductive Polybutylene Terephthalate
Categories:	Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT)
Material Notes:	CoolPoly D series of thermally conductive plastics transfers heat, a characteristic previously unavailable in injection molding grade polymers. CoolPoly is lightweight, netshape moldable and allows design freedom in applications previously restricted to metals. The D series is electrically non-conductive and can be used for its dielectric properties. CoolPoly D4302 is a thermally conductive injection molding resin based on a PBT matrix. CoolPoly D4302 is electrically insulative. Thermally conductive polymers like CoolPoly D4302 cool faster than standard injection molding grade resins. Information provided by Cool Polymers, Inc.
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Physical Properties	Original Value	Comments

Density	1.47 g/cc	ISO 1183
Linear Mold Shrinkage	0.0070 - 0.010 cm/cm	ASTM D551

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	42.0 MPa	ISO 527-1
Elongation at Break	1.45 %	ISO 527-1
Tensile Modulus	6.00 GPa	ISO 527-1
Flexural Strength	61.0 MPa	ISO 178
Flexural Modulus	3.40 GPa	ISO 178
Charpy Impact Unnotched	2.40 J/cm²	ISO 179-1
Charpy Impact, Notched	0.280 J/cm²	ISO 179-1

Thermal Properties	Original Value	Comments
Specific Heat Capacity	1.31 J/g-°C	ASTM E1461
Thermal Conductivity	2.60 W/m-K	ASTM E1461

Processing Properties	Original Value	Comments
Rear Barrel Temperature	200 - 210 °C
Middle Barrel Temperature	204 - 227 °C
Front Barrel Temperature	216 - 238 °C
Melt Temperature	216 - 238 °C
Mold Temperature	27.0 - 66.0 °C
Drying Temperature	82.0 °C
Dry Time	4 hour
Dew Point	-18.0 °C
Injection Pressure	35.0 - 82.0 MPa
Hold Pressure	14.0 - 28.0 MPa
Back Pressure	0.000 - 0.350 MPa
Screw Speed	40 - 100 rpm

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