Covestro Makrolon® 2608 Polycarbonate

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Covestro Makrolon® 2608 Polycarbonate
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate, Molded
Material Notes:	Medical devices; suitable for ETO and steam sterilization at 121°C; biocompatible according to many ISO 10993-1 test requirements; medium viscosity Mechanical property data for samples at 50% RH. Information provided by Covestro.
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Physical Properties	Original Value	Comments

Bulk Density	0.660 g/cc @Temperature 23.0 °C	pellets; ISO 60
Density	1.20 g/cc	ISO 1183-1
Moisture Absorption at Equilibrium	0.12 % @Temperature 23.0 °C	ISO 62
Water Absorption at Saturation	0.30 % @Temperature 23.0 °C	ISO 62
Linear Mold Shrinkage	0.0070 in/in @Pressure 50.0 MPa	60x60x2 mm; ISO 294-4
Linear Mold Shrinkage, Flow	0.0065 in/in @Pressure 50.0 MPa	60x60x2 mm; ISO 294-4
Melt Flow	13 g/10 min @Load 1.20 kg, Temperature 300 °C	ISO 1133

Mechanical Properties	Original Value	Comments
Ball Indentation Hardness	16000 psi @Temperature 23.0 °C	ISO 2039-1
Tensile Strength at Break	70.0 MPa	50mm/min; ISO 527-1,-2
Tensile Strength, Yield	65.0 MPa	50mm/min; ISO 527-1,-2
Elongation at Break	>= 50 %	50mm/min, complete break; ISO 524-1,-2
	120 %	50mm/min; b.o. ISO 527-1,-2
Elongation at Yield	6.3 %	50mm/min; ISO 527-1,-2
Tensile Modulus	2350 MPa @Temperature 23.0 °C	1mm/min, complete break; ISO 527-1,-2
Flexural Strength	96.0 MPa	2mm/min; ISO 178
	72.0 MPa @Strain 3.5 %	2mm/min; ISO 178
Flexural Modulus	2350 MPa @Temperature 23.0 °C	2mm/min; ISO 178
Flexural Strain at Break	7.0 %	2 mm/min; ISO 178
Izod Impact, Notched (ISO)	15.0 kJ/m² @Thickness 3.00 mm, Temperature -30.0 °C	Complete Break; ISO 7391/b.o. ISO 180-A
	65.0 kJ/m² @Thickness 3.00 mm, Temperature 23.0 °C	Partial Break; ISO 7391/b.o. ISO 180-A
Charpy Impact Unnotched	NB @Temperature 23.0 °C	ISO 179-1eU
	NB @Temperature -30.0 °C	ISO 179-1eU
	NB @Temperature -60.0 °C	ISO 179-1eU
Charpy Impact, Notched	16.0 kJ/m² @Thickness 3.00 mm, Temperature -30.0 °C	ISO 7391/b.o.ISO 179-1eA
	70.0 kJ/m² @Thickness 3.00 mm, Temperature 23.0 °C	ISO 7391/b.o.ISO 179-1eA
Puncture Energy	60.0 J @Temperature 23.0 °C	complete break; ISO 6603-2
	65.0 J @Temperature -30.0 °C	complete break; ISO 6603-2
Tensile Creep Modulus, 1 hour	2200 MPa @Temperature 23.0 °C	ISO 899-1
Tensile Creep Modulus, 1000 hours	1900 MPa @Temperature 23.0 °C	ISO 899-1

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	65.0 µm/m-°C @Temperature 23.0 - 55.0 °C	ISO 11359-1,-2
CTE, linear, Transverse to Flow	65.0 µm/m-°C @Temperature 23.0 - 55.0 °C	ISO 11359-1,-2
Thermal Conductivity	0.200 W/m-K	cross flow; ISO 8302
Hot Ball Pressure Test	138 °C	IEC 60695-10-2
Deflection Temperature at 0.46 MPa (66 psi)	139 °C	ISO 75-1,-2
Deflection Temperature at 1.8 MPa (264 psi)	127 °C	ISO 75-1,-2
Vicat Softening Point	146 °C @Load 5.10 kg	@ 50°C/h; ISO 306
	147 °C @Load 5.10 kg	@ 120°C/h; ISO 306
Glass Transition Temp, Tg	148 °C	10°C/min; ISO 11357-1,-2
Flash Point	480 °C	ASTM D1929
Ignition Temperature	550 °C	Self Ignition; ASTM D1929

Optical Properties	Original Value	Comments
Refractive Index	1.586	ISO 489 procedure A
Haze	<= 0.80 % @Thickness 3.00 mm	for transparent material; ISO 14782
Transmission, Visible	87 % @Thickness 4.00 mm	Luminous; ISO 13468-2
	88 % @Thickness 3.00 mm	Luminous; ISO 13468-2
	89 % @Thickness 1.00 mm	Luminous; ISO 13468-2
	89 % @Thickness 2.00 mm	Luminous; ISO 13468-2

Processing Properties	Original Value	Comments
Melt Temperature	290 °C	injection molding; ISO 294
Mold Temperature	80.0 °C	injection molding; ISO 294
Injection Velocity	200 mm/sec	injection molding; ISO 294

Descriptive Properties
Puncture Maximum Force (N)	5400	ISO 6603-2, at 23°C, complete break
	6300	ISO 6603-2, at -30°C, complete break

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