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Makrolon? 2256

Manufacturer: Covestro
Produced At: Europe / China
Product Category: Polycarbonate（PC）
Product No: Makrolon 2256
Product Quantity: 25KG / BAG
Product Features: Food Contact Acceptable、Good Mold Release，Low Viscosity

Product information

Makrolon? 2256

Polycarbonate

Covestro - Polycarbonates

Product Description:

MVR (300°C/1.2 kg) 34 cm3/10 min; food contact quality; low viscosity; easy release; injection molding - melt temperature 280 - 320°C; available in transparent, translucent and opaque colors

Features	Food Contact Acceptable，Good Mold Release，Low Viscosity
RoHS Compliance	RoHS Compliant
Appearance	Clear/Transparent，Colors Available，Opaque，Translucent
Processing Method	Injection Molding

Physical	Nominal Value	Unit	Test Method
Density (73°F)	1.19	g/cm3	ISO 1183
Apparent (Bulk) Density 2	0.66	g/cm3	ISO 60
Melt Mass-Flow Rate (MFR) (300°C/1.2 kg)	37	g/10 min	ISO 1133
Melt Volume-Flow Rate (MVR) (300°C/1.2 kg)	2.07	in3/10min	ISO 1133
Molding Shrinkage
Across Flow	0.50 to 0.70	%	ISO 2577
Flow	0.50 to 0.70	%	ISO 2577
Across Flow : 536°F, 0.0787 in 3	0.65	%	ISO 294-4
Flow : 0.0787 in 3	0.65	%	ISO 294-4
Water Absorption			ISO 62
Saturation, 73°F	0.30	%
Equilibrium, 73°F, 50% RH	0.12	%
Hardness	Nominal Value	Unit	Test Method
Ball Indentation Hardness	16700	psi	ISO 2039-1

Mechanical	Nominal Value	Unit	Test Method
Tensile Modulus (73°F)	348000	psi	ISO 527-2/1
Tensile Stress			ISO 527-2/50
Yield, 73°F	9430	psi
Break, 73°F	8700	psi
Tensile Strain			ISO 527-2/50
Yield, 73°F	6.0	%
Break, 73°F	130	%
Nominal Tensile Strain at Break (73°F)	> 50	%	ISO 527-2/50
Tensile Creep Modulus			ISO 899-1
1 hr	319000	psi
1000 hr	276000	psi
Flexural Modulus 4 (73°F)	341000	psi	ISO 178
Flexural Stress 4			ISO 178
73°F	14100	psi
3.5% Strain, 73°F	10600	psi
Flexural Strain at Flexural Strength 5 (73°F)	7.1	%	ISO 178
Films	Nominal Value	Unit	Test Method
Water Vapor Transmission Rate (73°F, 85% RH, 3.9 mil)	0.97	g/100 in2/24 hr	ISO 15106-1
Gas Permeation			ISO 2556
Carbon Dioxide : 1.0 mil	18900	cm3/m2/bar/24 hr
Carbon Dioxide : 3.9 mil	4500	cm3/m2/bar/24 hr
Nitrogen : 1.0 mil	630	cm3/m2/bar/24 hr
Nitrogen : 3.9 mil	150	cm3/m2/bar/24 hr
Oxygen : 1.0 mil	3150	cm3/m2/bar/24 hr
Oxygen : 3.9 mil	750	cm3/m2/bar/24 hr
Impact	Nominal Value	Unit	Test Method
Charpy Notched Impact Strength 6, 7			ISO 7391
-22°F, Complete Break	5.7	ft·lb/in2
73°F, Partial Break	26	ft·lb/in2
Charpy Unnotched Impact Strength			ISO 179/1eU
-76°F	No Break
-22°F	No Break
73°F	No Break
Notched Izod Impact Strength 8, 7			ISO 7391
-22°F, Complete Break	5.7	ft·lb/in2
73°F	26	ft·lb/in2
Multi-Axial Instrumented Impact Energy			ISO 6603-2
-22°F	44.3	ft·lb
73°F	40.6	ft·lb
Multi-Axial Instrumented Impact Peak Force			ISO 6603-2
-22°F	1330	lbf
73°F	1100	lbf

Thermal	Nominal Value	Unit	Test Method
Heat Deflection Temperature
66 psi, Unannealed	279	°F	ISO 75-2/B
264 psi, Unannealed	255	°F	ISO 75-2/A
Glass Transition Temperature 9	293	°F	ISO 11357-2
Vicat Softening Temperature
--	293	°F	ISO 306/B50
--	295	°F	ISO 306/B120
Ball Pressure Test (277°F)	Pass		IEC 60695-10-2
CLTE			ISO 11359-2
Flow : 73 to 131°F	3.6E-5	in/in/°F
Transverse : 73 to 131°F	3.6E-5	in/in/°F
Thermal Conductivity 10 (73°F)	1.4	Btu·in/hr/ft2/°F	ISO 8302

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Makrolon? 2256

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