NOVA Chemicals DYLARK® 250 Impact Grade Engineering Resin

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NOVA Chemicals DYLARK® 250 Impact Grade Engineering Resin
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Impact Modified
Material Notes:	Features: High heat resistance Good chemical resistance High impact strength Excellent flow characteristics Applications: Automotive interior trim applications Automotive consoles Structural Housings Information provided by Nova Chemicals INEOS NOVA began October 1 2007 as an expansion of the 50:50 joint venture between NOVA Chemicals and INEOS to include North American assets.
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Physical Properties	Original Value	Comments

Specific Gravity	1.06 g/cc	ISO 1183
Linear Mold Shrinkage	0.0050 cm/cm	ISO 2577
Melt Flow	0.90 g/10 min @Load 2.16 kg, Temperature 230 °C	ISO 1133

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	32.0 MPa	ISO 527-2
Elongation at Break	27 %	ISO 527-2
Tensile Modulus	2.30 GPa	ISO 527-2
Flexural Strength	60.0 MPa	ISO 178
Flexural Modulus	2.40 GPa	ISO 178
Izod Impact, Notched (ISO)	0.880 J/cm²	ISO 180/1A

Thermal Properties	Original Value	Comments
CTE, linear	80.0 µm/m-°C @Temperature 20.0 °C	NOVA Chemicals Laboratory Procedure
Deflection Temperature at 1.8 MPa (264 psi)	93.0 °C @Diameter 4.00 mm	Unannealed; bar; ISO 75-2

Processing Properties	Original Value	Comments
Processing Temperature	177 - 260 °C	Profile temperatures
Melt Temperature	204 - 260 °C	air purge at equilibrium conditions
Mold Temperature	43.0 - 60.0 °C	Core surface temp. at equilibrium
	54.0 - 71.0 °C	Cavity surface temp. at equilibrium
Back Pressure	50.0 - 100 psi	Typically 50 psi
Screw Speed	40 - 80 rpm

Descriptive Properties
Injection Speed	medium-fast	Typically fast

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PNOV948 / 54894

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