Covestro Makrolon® 1248 Polycarbonate, Impact Grade

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Covestro Makrolon® 1248 Polycarbonate, Impact Grade
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate, Impact Modified
Material Notes:	ISO 7391-PC,MP,(,,)-09-9 MVR (300 °C/1.2 kg) 7.0 cm³/10 min; food contact quality; medium viscosity; impact modified; injection molding - melt temperature 280 - 320 °C; available in light colors only As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and officially adopted its new name – Covestro.
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Physical Properties	Metric	English	Comments

Bulk Density	0.640 g/cc	0.0231 lb/in³	pellets; ISO 60
Density	1.20 g/cc	0.0434 lb/in³	ISO 1183
Moisture Absorption at Equilibrium	0.12 %	0.12 %	ISO 62
Water Absorption at Saturation	0.40 %	0.40 %	ISO 62
Linear Mold Shrinkage, Flow	0.0075 cm/cm	0.0075 in/in	60x60x2 mm; 500 bar; ISO 294-4,2577
Linear Mold Shrinkage, Transverse	0.0080 cm/cm	0.0080 in/in	60x60x2 mm; 500 bar; ISO 294-4,2577
Melt Flow	7.5 g/10 min @Load 1.20 kg, Temperature 300 °C	7.5 g/10 min @Load 2.65 lb, Temperature 572 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Ball Indentation Hardness	108 MPa	15700 psi	ISO 2039-1
Tensile Strength at Break	70.0 MPa	10200 psi	50 mm/min; ISO 527-1/-2
Tensile Strength, Yield	61.0 MPa	8850 psi	50 mm/min; ISO 527-1/-2
Elongation at Break	>= 50 %	>= 50 %	Nominal, 50 mm/min; ISO 527-1/-2
	130 %	130 %	50 mm/min; b.o. ISO 527-1/-2
Elongation at Yield	6.0 %	6.0 %	50 mm/min; ISO 527-1/-2
Tensile Modulus	2.25 GPa	326 ksi	50 mm/min; ISO 527-1/-2
Flexural Strength	88.0 MPa	12800 psi	2 mm/min; ISO 178
Flexural Yield Strength	68.0 MPa @Strain 3.5 %	9860 psi @Strain 3.5 %	2 mm/min; ISO 178
Flexural Modulus	2.25 GPa	326 ksi	2 mm/min; ISO 178
Flexural Strain at Yield	6.8 %	6.8 %	2 mm/min; ISO 178
Izod Impact, Notched (ISO)	30.0 kJ/m² @Temperature -30.0 °C	14.3 ft-lb/in² @Temperature -22.0 °F	3 mm, Partial break; ISO 7391/b.o. ISO 180-A
	65.0 kJ/m² @Temperature 23.0 °C	30.9 ft-lb/in² @Temperature 73.4 °F	3 mm, Partial break; ISO 7391/b.o. ISO 180-A
Charpy Impact Unnotched	NB	NB	ISO 179/1eU
	NB @Temperature -30.0 °C	NB @Temperature -22.0 °F	ISO 179/1eU
	NB @Temperature -60.0 °C	NB @Temperature -76.0 °F	ISO 179-1eU
Charpy Impact, Notched	6.00 J/cm² @Temperature -30.0 °C	28.6 ft-lb/in² @Temperature -22.0 °F	3 mm; ISO 7391/b.o. ISO 179-1eA
	7.00 J/cm² @Temperature 23.0 °C	33.3 ft-lb/in² @Temperature 73.4 °F	3 mm, Partial break; ISO 7391/b.o. ISO 179-1eA
Impact	5200	5200	Puncture - maximum force (N); ISO 6603-2
	6100 @Temperature -30.0 °C	6100 @Temperature -22.0 °F	Puncture - maximum force (N); ISO 6603-2
Puncture Energy	55.0 J	40.6 ft-lb	ISO 6603-2
	60.0 J @Temperature -30.0 °C	44.3 ft-lb @Temperature -22.0 °F	ISO 6603-2

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+14 ohm-cm	1.00e+14 ohm-cm	IEC 60093
Surface Resistance	1.00e+16 ohm	1.00e+16 ohm	IEC 60093
Dielectric Constant	3.0 @Frequency 1e+6 Hz	3.0 @Frequency 1e+6 Hz	IEC 60250
	3.1 @Frequency 100 Hz	3.1 @Frequency 100 Hz	IEC 60250
Dielectric Strength	34.0 kV/mm	864 kV/in	1 mm; IEC 60243-1
Dissipation Factor	0.0012 @Frequency 100 Hz	0.0012 @Frequency 100 Hz	IEC 60250
	0.012 @Frequency 1e+6 Hz	0.012 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	125 V	125 V	CTI M; Solution B; IEC 60112
	225 V	225 V	Solution A; IEC 60112

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	70.0 µm/m-°C @Temperature 23.0 - 55.0 °C	38.9 µin/in-°F @Temperature 73.4 - 131 °F	ISO 11359-1/-2
CTE, linear, Transverse to Flow	70.0 µm/m-°C @Temperature 23.0 - 55.0 °C	38.9 µin/in-°F @Temperature 73.4 - 131 °F	ISO 11359-1/-2
Thermal Conductivity	0.200 W/m-K	1.39 BTU-in/hr-ft²-°F	ISO 8302
Deflection Temperature at 0.46 MPa (66 psi)	139 °C	282 °F	ISO 75-1/-2
Deflection Temperature at 1.8 MPa (264 psi)	125 °C	257 °F	ISO 75-1/-2
Vicat Softening Point	146 °C	295 °F	50°C/h 50N; ISO 306
	148 °C @Load 5.10 kg	298 °F @Load 11.2 lb	120°C/hr; ISO 306
Glass Transition Temp, Tg	148 °C	298 °F	ISO 11357-1,-2
Flammability, UL94	HB @Thickness 1.50 mm	HB @Thickness 0.0591 in	IEC 60695-11-10
Flash Point	430 °C	806 °F	ASTM D1929
Oxygen Index	30 %	30 %	ISO 4589-1/-2
Glow Wire Ignition Temperature	800 °C @Thickness 0.750 mm	1470 °F @Thickness 0.0295 in	IEC 60695-2-13
	875 °C @Thickness 1.50 mm	1610 °F @Thickness 0.0591 in	IEC 60695-2-13
	875 °C @Thickness 3.00 mm	1610 °F @Thickness 0.118 in	IEC 60695-2-13
Glow Wire Flammability Index	850 °C @Thickness 0.750 mm	1560 °F @Thickness 0.0295 in	IEC 60695-2-12
	850 °C @Thickness 1.50 mm	1560 °F @Thickness 0.0591 in	IEC 60695-2-12
	900 °C @Thickness 3.00 mm	1650 °F @Thickness 0.118 in	IEC 60695-2-12
Ignition Temperature	540 °C	1000 °F	Self Ignition; ASTM D1929

Optical Properties	Metric	English	Comments
Refractive Index	1.586	1.586	ISO 486
Transmission, Visible	88 % @Thickness 76.2 mm	88 % @Thickness 3.00 in	ISO 13468-2
	89 % @Thickness 25.4 mm	89 % @Thickness 1.00 in	ISO 13468-2
	89 % @Thickness 50.8 mm	89 % @Thickness 2.00 in	ISO 13468-2

Processing Properties	Metric	English	Comments
Melt Temperature	300 °C	572 °F	Injection Molding; ISO 294
Mold Temperature	80.0 °C	176 °F	Injection Molding; ISO 294
Injection Velocity	200 mm/sec	7.87 in/sec	ISO 294

Descriptive Properties
Electrolytic corrosion	A1		IEC 60426
halving interval	45°C		tensile strength, 1 mm; IEC 60216-1
Needle flame test	10 s		Method K, 3 mm; IEC 60695-11-5
	120 s		Method F, 3 mm; IEC 60695-11-5
	5 s		Method K, 2 mm; IEC 60695-11-5
	60 s		Method F, 1.5 mm; IEC 60695-11-5
	60 s		Method F, 2 mm; IEC 60695-11-5
Resistance to heat	138°C		ball pressure test; IEC 60695-10-2
Themperature index	455°C		tensile impact strength, 20000 h, 1 mm; IEC 60216-1

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PB09891 / 92731

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