Celanese Celanex® 2008 PBT

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Celanese Celanex® 2008 PBT (Unverified Data**)
Categories:	Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT)
Material Notes:	Celanex 2008 is a general purpose, unreinforced polybutylene terephthalate with a good balance of mechanical properties and processability for use in melt blown applications. Ultrahigh melt flow Information provided by Celanese
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Physical Properties	Original Value	Comments

Specific Gravity	1.31 g/cc	ASTM D792
Density	1.31 g/cc	ISO 1183
Water Absorption	0.090 %	24hr immersion; ASTM D570
Moisture Absorption	0.170 %	23°C/50%RH; ISO 62
Linear Mold Shrinkage, Flow	0.018 - 0.020 in/in	ASTM D955
	0.018 - 0.020 cm/cm	ISO 294-4
Linear Mold Shrinkage, Transverse	0.018 - 0.020 cm/cm	ISO 294-4

Mechanical Properties	Original Value	Comments
Hardness, Rockwell M	72	ISO 2039-2
Tensile Strength at Break	47.0 MPa	50mm/min; ISO 527-2/1A
	60.0 MPa	5mm/min; ISO 527-2/1A
Tensile Strength, Yield	8000 psi	ASTM D638
Elongation at Break	2.0 %	50mm/min; ISO 527-2/1A
	5.0 %	5mm/min; ISO 527-2/1A
	5.0 % @Temperature 22.8 °C	ASTM D638
Tensile Modulus	2600 MPa	1mm/min; ISO 527-2/1A
Flexural Strength	80.0 MPa	ISO 178
	12000 psi	ASTM D790
Flexural Modulus	2200 MPa	ISO 178
	330000 psi @Temperature 22.8 °C	ASTM D790
Izod Impact, Notched	0.500 ft-lb/in	ASTM D256
Izod Impact, Notched (ISO)	3.10 kJ/m²	ISO 180/1A
Charpy Impact Unnotched	38.0 kJ/m²	ISO 179/1eU
	44.0 kJ/m² @Temperature -30.0 °C	ISO 179/1eU
Charpy Impact, Notched	2.80 kJ/m²	ISO 179/1eA
	2.10 kJ/m² @Temperature -30.0 °C	ISO 179/1eA

Electrical Properties	Original Value	Comments
Volume Resistivity	>= 1.00e+15 ohm-cm	IEC 60093
	1.00e+16 ohm-cm	ASTM D257
Surface Resistance	>= 1.00e+15 ohm	IEC 60093
Dielectric Constant	3.2 @Frequency 1e+6 Hz	ASTM D150
	3.2 @Frequency 1e+6 Hz	IEC 60250
	3.3 @Frequency 100 Hz	IEC 60250
Dielectric Strength	15.0 kV/mm	IEC 60243-1
	400 V/mil	short term; ASTM D149
Dissipation Factor	0.0010 @Frequency 1e+6 Hz	ASTM D150
	0.020 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	350 V	IEC 60112

Thermal Properties	Original Value	Comments
CTE, linear	110 µm/m-°C	ISO 11359-2
CTE, linear, Transverse to Flow	100 µm/m-°C	ISO 11359-2
Melting Point	225 °C	10°C/min; ISO 11357-1,-2,-3
	437 °F	ASTM D3418
Transformation Temperature, Tg	60.0 °C	10°C/min; ISO 11357-1,-2,-3
Deflection Temperature at 0.46 MPa (66 psi)	155 °C	ISO 75-1, -2
	310 °F	ASTM D648
Deflection Temperature at 1.8 MPa (264 psi)	57.0 °C	ISO 75-1, -2
	130 °F	ASTM D648
Flammability, UL94	HB	UL94

Processing Properties	Original Value	Comments
Processing Temperature	20.0 - 50.0 °C
	65.0 - 93.0 °C	Cavity temperature
Feed Temperature	230 - 240 °C
Rear Barrel Temperature	230 - 240 °C
Middle Barrel Temperature	235 - 250 °C
Front Barrel Temperature	240 - 260 °C
Nozzle Temperature	250 - 260 °C
Zone 1	230 - 240 °C
Zone 2	235 - 250 °C
Zone 3	235 - 250 °C
Zone 4	240 - 260 °C
Die Temperature	250 - 260 °C
Melt Temperature	243 °C	Injection molding; ISO 294
	235 - 260 °C
Mold Temperature	82.0 °C	Injection molding; ISO 294
	150 - 200 °F
Injection Velocity	300 mm/sec	ISO 294
Drying Temperature	120 - 130 °C
Dry Time	4.00 hour
Moisture Content	0.020 %	Necessary low maximum residual
Hold Pressure	48.0 MPa	ISO 294
Back Pressure	0.000 - 50.0 psi
Hot-Working Temperature	250 - 260 °C

Descriptive Properties
Injection molding	Yes
Injection speed	medium-fast
Longer pre-drying times/storage	lower the temperature to 100° C until processed.	<= 60 h
Processing conditions	ISO 7792-2
Processing Notes	Fast Injection Speed
	Medium Screw Speed

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