Wellman Expond® C6540L-638B Polypropylene

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Wellman Expond® C6540L-638B Polypropylene
Categories:	Polymer; Thermoplastic; Polypropylene (PP); Polypropylene, Molded
Material Notes:	Expond® Polypropylene (PP) is a linear polymer with low density and typically exhibits high crystallization. It consistently has relatively high performance characteristics, such as good mechanical equilibrium, chemical corrosion resistance, workability, low price and other advantages. Features: Excellent balance of toughness and stiffness, Low-odor, low-VOC, and low-emission performance, Excellent scratch resistance performance, Excellent anti-stick performance, Excellent resistance to stress performance Excellent weather fastness performance, Easy to process, Excellent spraying performance. Applications: Automotive Dashboard, Door, Column, Seat guard plate, Bumper, Rubbing strip, Bottom plate. Information provided by Wellman Advanced Materials.
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Physical Properties	Metric	English	Comments

Density	0.910 g/cc	0.0329 lb/in³	ISO 1183
Melt Flow	15 g/10 min @Load 2.16 kg, Temperature 230 °C	15 g/10 min @Load 4.76 lb, Temperature 446 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Tensile Strength	19.0 MPa	2760 psi	ISO 527-2
Elongation at Yield	7.5 %	7.5 %	ISO 527-2
Flexural Modulus	1.13 GPa	164 ksi	ISO 178
Izod Impact, Notched (ISO)	3.90 kJ/m² @Temperature -40.0 °C	1.86 ft-lb/in² @Temperature -40.0 °F	ISO 180
	26.0 kJ/m² @Temperature 23.0 °C	12.4 ft-lb/in² @Temperature 73.4 °F	ISO 180

Thermal Properties	Metric	English	Comments
Deflection Temperature at 1.8 MPa (264 psi)	54.0 °C	129 °F	ISO 75-2
Flame Spread	34.0 mm/min	1.34 in/min	ISO 3795

Processing Properties	Metric	English	Comments
Rear Barrel Temperature	160 - 180 °C	320 - 356 °F
Middle Barrel Temperature	180 - 200 °C	356 - 392 °F
Front Barrel Temperature	200 - 230 °C	392 - 446 °F
Nozzle Temperature	190 - 200 °C	374 - 392 °F
Mold Temperature	20.0 - 60.0 °C	68.0 - 140 °F
Drying Temperature	90.0 - 100 °C @Time 3600 - 7200 sec	194 - 212 °F @Time 1.00 - 2.00 hour
Moisture Content	0.10 %	0.10 %
Injection Pressure	70.0 - 100 MPa	10200 - 14500 psi
Back Pressure	0.300 - 0.700 MPa	43.5 - 102 psi
Screw Speed	40 - 80 rpm	40 - 80 rpm

Descriptive Properties
Color fastness to light, accelerated	FLTM B0 116-01. 2481.6 Kj/m2

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PWEL00865 / 249989

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