Covestro Makrolon® Rx1805 PC Resin
Plastic Granules
Makrolon Rx1805 PC Resin
Makrolon Rx1805 is a medical-grade polycarbonate resin by Covestro, engineered for high-viscosity injection molding. With exceptional lipid resistance, radiation sterilization compatibility, and ISO 10993-1 biocompliance, it ensures safety and durability for critical healthcare components.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt Volume-Flow Rate (MVR): 6.0 cm³/10 min (300 °C/1.2 kg) (ISO 1133)
- Melt Mass-Flow Rate (MFR): 6.5 g/10 min (300 °C/1.2 kg) (ISO 1133)
- Molding Shrinkage (Parallel): 0.7% (60x60x2 mm³, 500 bar) (ISO 294-4)
- Molding Shrinkage (Normal): 0.7% (60x60x2 mm³, 500 bar) (ISO 294-4)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile Modulus: 2400 MPa (1 mm/min) (ISO 527-1, -2)
- Yield Stress: 67 MPa (50 mm/min) (ISO 527-1, -2)
- Yield Strain: 6.3% (50 mm/min) (ISO 527-1, -2)
- Flexural Modulus: 2400 MPa (2 mm/min) (ISO 178)
- Flexural Strength: 98 MPa (2 mm/min) (ISO 178)
- Charpy Notched Impact Strength (23 °C, 3 mm): 80 kJ/m² (ISO 21305/179/1eA)
- Charpy Notched Impact Strength (-30 °C, 3 mm): 16 kJ/m² (ISO 21305/179/1eA)
- Puncture Impact Properties – Maximum Force (23 °C): 5700 N (ISO 6603-2)
- Puncture Energy (23 °C): 65 J (ISO 6603-2)
Thermal Properties
- Glass Transition Temperature (Tg): 145 °C (10 °C/min) (ISO 11357-1, -2)
- Temperature of Deflection under Load (1.80 MPa): 126 °C (ISO 75-1, -2)
- Temperature of Deflection under Load (0.45 MPa): 138 °C (ISO 75-1, -2)
- Vicat Softening Temperature: 144 °C (50 N, 50 °C/h) (ISO 306)
- Oxygen Index: 27% (ISO 4589-2)
- Thermal Conductivity (Through-Plane, 23 °C): 0.20 W/(m·K) (ISO 8302)
Other Properties (23 °C)
- Water Absorption (Saturation): 0.30% (Water at 23 °C) (ISO 62)
- Water Absorption (Equilibrium): 0.12% (23 °C, 50% r.h.) (ISO 62)
- Density: 1200 kg/m³ (ISO 1183-1)
- Bulk Density (Pellets): 660 kg/m³ (ISO 60)
Processing and Drying Conditions
- Injection Molding Melt Temperature: 280–320 °C (ISO 294)
- Injection Molding Mold Temperature: 80 °C (ISO 294)
- Recommended Melt Temperature: 290–330 °C (Standard: 310 °C)
- Drying Temperature: 120 °C (Dry Air Dryer)
- Drying Time: 2–3 hours
- Moisture Content (Max): ≤ 0.02%
- Vent Depth: 0.025–0.075 mm
Features & Benefits
Radiation-Resistant Sterilization
It withstands high-energy radiation (e.g., gamma/E-beam) without degradation, ideal for reusable surgical tools or implantable devices requiring repeated sterilization cycles.
Biocompatibility Assurance
It meets ISO 10993-1 standards for bodily contact, reducing regulatory hurdles for IV connectors, dialysis housings, and diagnostic equipment.
High Lipid & Chemical Resistance
It resists oils, lipids, and cleaning agents, preventing cracks or cloudiness in fluid-handling parts like transfusion chambers or drug delivery systems.
Use & Applications
- Medical Device Housings: MRI-safe equipment casings, ventilator components.
- Surgical Instruments: Transparent scalpel handles, forceps.
- Diagnostic & Fluid Management: Blood filters, IV connectors, dialysis parts.
- Implantable Prototyping: Biocompatible trial components.