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Makrolon® 6557

Technical Datasheet | Supplied by Covestro
Makrolon® 6557 by Covestro is an UV stabilized, flame-retardant polycarbonate (PC) grade. It exhibits medium viscosity and easy release. It is suitable for processing by injection molding. Complies with UL 94 V-2 flame rating.
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Makrolon® 6557
Technical Datasheet | Supplied by Covestro
REQUEST A SAMPLE ORIGINAL DATASHEET CONTACT SUPPLIER
Product Type
PC (Polycarbonate) > PC
Physical Form
Granules
Appearance
Transparent, Translucent, opaque
Product Status
COMMERCIAL
Applications/ Recommended for
Injection molding - thermoplastics
Key Features
  • Flame retarded
  • UV Stabilized
  • Viscosity, Medium

Makrolon® 6557 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Melt Volume Flow Rate (MVR)
10 cm3/10 min
(At 300°C, 1.2 kg) 
ISO 1133
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)
10 g/10 min
(At 300°C, 1.2 kg) 
ISO 1133
Linear Mold Shrinkage, Flow
0.65 %
(At 60x60x2 mm, 500 bar) 
ISO 294-4

Makrolon® 6557 Processing Guidelines

Injection Properties

Value & Unit
Test Condition
Test Method
Mold Temperature
80 - 120 °C
Injection Velocity
200 mm/s
Hold Pressure
50 - 75 %
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