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      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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