Covestro Makrolon® T7855 Polycarbonate, Impact Grade

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Covestro Makrolon® T7855 Polycarbonate, Impact Grade (discontinued **)
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate, Impact Modified
Material Notes:	ISO 7391-PC,MPR,(,,)-18-9 Global grade MVR (300 °C/1.2 kg) 12 cm³/10 min Impact modified Medium viscosity Easy release Injection molding - Melt temperature 280 - 320 °C Available in opaque 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

Density	1.19 g/cc	0.0430 lb/in³	ISO 1183
Melt Density	1.02 g/cc @Temperature 290 °C	0.0368 lb/in³ @Temperature 554 °F
Water Absorption	0.40 %	0.40 %	Similar to ISO 62
Moisture Absorption at Equilibrium	0.12 %	0.12 %	Similar to ISO 62
Melt Flow	12 g/10 min @Load 1.20 kg, Temperature 300 °C	12 g/10 min @Load 2.65 lb, Temperature 572 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Tensile Strength, Yield	62.0 MPa	8990 psi	ISO 527-1/-2
Elongation at Break	>= 50 %	>= 50 %	Nominal; ISO 527-1/-2
Elongation at Yield	5.8 %	5.8 %	ISO 527-1/-2
Tensile Modulus	2.25 GPa	326 ksi	ISO 527-1/-2
Charpy Impact Unnotched	NB	NB	ISO 179/1eU
	NB @Temperature -30.0 °C	NB @Temperature -22.0 °F	ISO 179/1eU
Impact	5100	5100	Puncture - maximum force (N); ISO 6603-2
	6000 @Temperature -30.0 °C	6000 @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+13 ohm-cm	>= 1.00e+13 ohm-cm	IEC 60093
Surface Resistance	>= 1.00e+15 ohm	>= 1.00e+15 ohm	IEC 60093
Dielectric Constant	3.1 @Frequency 1e+6 Hz	3.1 @Frequency 1e+6 Hz	IEC 60250
	3.2 @Frequency 100 Hz	3.2 @Frequency 100 Hz	IEC 60250
Dielectric Strength	34.0 kV/mm	864 kV/in	IEC 60243-1
Dissipation Factor	0.0014 @Frequency 100 Hz	0.0014 @Frequency 100 Hz	IEC 60250
	0.011 @Frequency 1e+6 Hz	0.011 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	200 V	200 V	IEC 60112

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	70.0 µm/m-°C	38.9 µin/in-°F	ISO 11359-1/-2
CTE, linear, Transverse to Flow	70.0 µm/m-°C	38.9 µin/in-°F	ISO 11359-1/-2
Specific Heat Capacity	1.70 J/g-°C	0.406 BTU/lb-°F	Melt
Thermal Conductivity	0.173 W/m-K	1.20 BTU-in/hr-ft²-°F	Melt
Deflection Temperature at 0.46 MPa (66 psi)	136 °C	277 °F	ISO 75-1/-2
Deflection Temperature at 1.8 MPa (264 psi)	123 °C	253 °F	ISO 75-1/-2
Vicat Softening Point	144 °C	291 °F	50°C/h 50N; ISO 306
Flammability, UL94	HB @Thickness 1.50 mm	HB @Thickness 0.0591 in	IEC 60695-11-10
Oxygen Index	30 %	30 %	ISO 4589-1/-2

Processing Properties	Metric	English	Comments
Melt Temperature	290 °C	554 °F	Injection Molding; ISO 294
	280 - 320 °C	536 - 608 °F
Mold Temperature	80.0 °C	176 °F	Injection Molding; ISO 10724
	80.0 - 120 °C	176 - 248 °F
	80.0 - 120 °C	176 - 248 °F
Ejection Temperature	130 °C	266 °F
Injection Velocity	200 mm/sec	7.87 in/sec	ISO 294
Drying Temperature	120 °C	248 °F
Dry Time	2.00 - 3.00 hour	2.00 - 3.00 hour	Dry air dryer
	2.00 - 4.00 hour	2.00 - 4.00 hour	Fresh air dryer (high speed dryer)
	4.00 - 12.0 hour	4.00 - 12.0 hour	Circulating air drying oven (50 % fresh air)
Moisture Content	<= 0.020 %	<= 0.020 %

Descriptive Properties
Availability	Asia Pacific
	Europe
	India
	Near East/Africa
	North America
	South and Central America
Eff. thermal diffusivity (m²/s)	1E-07
Feature	Release agent
Form	Pellets
Process	Injection Molding
UL recognition	UL\l1.5\n

**
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