Covestro Makrolon® 3158 PC Resin
Plastic Granules
Makrolon 3158 PC Resin
Makrolon 3158 is a high-viscosity, biocompatible polycarbonate resin engineered for demanding medical applications. With an MVR of 6.0 cm³/10 min (300°C/1.2 kg), it offers easy mold release, exceptional clarity (88% transmittance at 3mm), and compliance with ISO 10993-1 biocompatibility standards. Ideal for sterilization-critical devices.
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): 0.75 % (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: 66 MPa (50 mm/min) (ISO 527-1,-2)
- Yield Strain: 6.2 % (50 mm/min) (ISO 527-1,-2)
- Nominal Strain at Break: >50 % (50 mm/min) (ISO 527-1,-2)
- Flexural Modulus: 2400 MPa (2 mm/min) (ISO 178)
- Flexural Strength: 97 MPa (2 mm/min) (ISO 178)
- Charpy Notched Impact Strength (23 °C, 3 mm): 80 kJ/m² (ISO 21305/ISO 179/1eA)
- Charpy Notched Impact Strength (-30 °C, 3 mm): 16 kJ/m² (ISO 21305/ISO 179/1eA)
Thermal Properties
- Glass Transition Temperature: 146 °C (10 °C/min) (ISO 11357-1,-2)
- Temperature of Deflection Under Load (1.80 MPa): 126 °C (ISO 75-1,-2)
- Vicat Softening Temperature (50 N, 50 °C/h): 147 °C (ISO 306)
- Thermal Conductivity (23 °C, 50 % r.h.): 0.20 W/(m·K) (ISO 8302)
- Coefficient of Linear Thermal Expansion (23-55 °C, Parallel): 0.65 × 10⁻⁴/K (ISO 11359-1,-2)
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)
- Refractive Index: 1.587 (ISO 489)
- Haze (Transparent Materials, 3 mm): <0.8 % (ISO 14782)
- Luminous Transmittance (Clear Transparent Materials, 2 mm): 89 % (ISO 13468-2)
Processing and Drying Conditions
- Melt Temperature (Injection Molding): 290-330 °C (ISO 294)
- Mold Temperature: 80-120 °C (ISO 294)
- Drying Temperature (Dry Air): 120 °C
- Drying Time (Dry Air): 2-3 hours
- Moisture Content (Max): ≤0.02 %
Features & Benefits
Biocompatible & Sterilization-Ready
Makrolon® 3158 passes ISO 10993-1 tests and withstands ETO/steam sterilization (121°C), ensuring safety for implants, surgical tools, and diagnostic equipment without degradation.
Unmatched Impact Resistance
With puncture energy up to 70 J and tensile strength of 70 MPa, it prevents cracking in high-stress medical housings, IV connectors, and trauma devices—even at subzero temperatures.
Precision Moldability
Low shrinkage (0.6–0.8%) and optimized flow simplify injection molding of thin-walled components like transparent syringe barrels or opaque surgical handles, reducing rejects by 20%.
Use & Applications
- Sterilizable medical devices: Surgical instrument housings, dialysis components.
- Injection-molded labware: Petri dishes, transparent fluid reservoirs.
- ETO/steam-sterilized (121°C) equipment: IV drip chambers, respirator valves.