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Products

Makrolon? 2256

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

Makrolon? 2256

Polycarbonate
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

Products are widely used in plastic modification, automotive, construction, electrical and electronic, industrial, daily necessities and other fields


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