Physical Properties
- Bulk Density: Measured for pellets per ISO 60, bulk density is 0.660 g/cc (0.0238 lb/in³), reflecting packing density in granular form.
- Density: Determined by ISO 1183, density is 1.20 g/cc (0.0434 lb/in³), a fundamental mass-to-volume property for material specification.
- Moisture Absorption at Equilibrium: At 50% RH per ISO 62, moisture absorption is 0.12%, ensuring stability in humid environmental conditions.
- Water Absorption at Saturation: As per ISO 62, water absorption at saturation is 0.30%, critical for assessing material water resistance limits.
- Linear Mold Shrinkage: Ranges 0.0050–0.0070 cm/cm (in/in) parallel/normal per ISO 2577, indicating typical dimensional change in molding.
- Linear Mold Shrinkage, Flow: For 60x60x2 mm samples at 500 bar (ISO 294-4), flow shrinkage is 0.0065 cm/cm (0.0065 in/in) along processing direction.
- Linear Mold Shrinkage, Transverse: At 500 bar (ISO 294-4), transverse shrinkage is 0.0070 cm/cm (0.0070 in/in) across processing direction for molded parts.
- Melt Flow: Per ISO 1133, melt flow rate is 20 g/10 min at 300°C (572°F) under 1.20 kg (2.65 lb) load, reflecting processability in injection molding.
Polymer Properties:
- Base Material: Polycarbonate (PC)
- Modification Features:
- Flame – retardant and UV – resistant properties.
- High impact resistance for durability.
- Good heat resistance and dimensional stability.
- Suitable for complex part geometries in injection molding.
Applications:
Makrolon® 2458 is Primarily used for medical devices that require a balance of mechanical strength, transparency, and the ability to withstand harsh sterilization procedures.
Drug Delivery and Medical Devices:This grade is an ideal material for components in medical equipment and drug delivery systems, particularly where transparency and durability are crucial.
- Impact Resistance: The material exhibits a high Charpy notched impact strength, measured as “>10-30 kJ/m² (ISO 179/1eA)” at 23 °C.
- This data point highlights its toughness and resistance to breakage, which is essential for medical devices that may experience accidental drops or impacts.
- Sterilization Capability: Makrolon® 2458 is suitable for both Ethylene Oxide (EtO) and steam sterilization at 121°C.
- This resistance to common sterilization methods is a critical requirement for reusable medical devices and components.
- Biocompatibility: The material is biocompatible according to many ISO 10993-1 test requirements and is approved for USP Class VI, making it safe for contact with patients.
- This certification is mandatory for components like auto-injector housings or diagnostic equipment.
Diagnostic and Monitoring Equipment Components:The transparency and dimensional stability of Makrolon® 2458 make it suitable for components in diagnostic and monitoring devices where clarity and precision are non-negotiable.
- High Transparency: The material has a luminous transmittance of 89% (ISO 13468-1), allowing for clear visual inspection of fluids or internal components, which is vital in medical monitoring equipment.
- Dimensional Stability: With a low molding shrinkage of 0.5-0.7%, the material ensures that parts maintain their precise dimensions, a key factor for creating accurate and reliable diagnostic tools.
- Heat Resistance: The material has a Vicat softening temperature of 145°C (ISO 306) and a heat deflection temperature of 125°C at 1.80 MPa (ISO 75-1/-2).
- This high heat resistance allows it to maintain its structural integrity under the operating temperatures of many medical devices.
