Physical Properties
- Density: The density is 0.952 g/cc (0.0344 lb/in³), a fundamental property influencing material weight and structural design considerations.
- Water Absorption: Water absorption is 0.010%, indicating low hygroscopicity and minimal risk of swelling or performance degradation in wet environments.
- Moisture Absorption at Equilibrium: Moisture absorption at equilibrium is 0.010%, demonstrating stable behavior with negligible moisture uptake under balanced humidity conditions.
- Linear Mold Shrinkage, Flow: In the flow direction, linear mold shrinkage is 0.016 cm/cm (0.016 in/in), measured for injection-molded parts to assess dimensional stability.
- Linear Mold Shrinkage, Transverse: In the transverse direction, linear mold shrinkage is 0.012 cm/cm (0.012 in/in), reflecting differential shrinkage across material flow axes.
- Melt Flow: At 190°C (374°F) under a 2.16 kg (4.76 lb) load, the melt flow rate is 8.5 g/10 min, indicating suitable fluidity for extrusion or injection molding processes.
Polymer Properties:
- Base Material: High – Density Polyethylene (HDPE)
- Modification Features:
- Its easy – flow characteristic in injection molding allows for quick and accurate production of small parts.
- Provides good dimensional stability, ensuring consistent quality and fit of the molded parts.
Applications:
The main applications for Lupolen 5031 L focus on producing rigid, durable parts through injection molding. This includes:
- Caps and Closures: The resin’s excellent processability and high rigidity make it an ideal choice for manufacturing various caps and closures for bottles and containers.
- Small Automotive Parts: Its chemical resistance and mechanical strength are well-suited for smaller automotive components like battery caps or connector housings.
- Household and Garden Items: The material’s durability and good aesthetic properties are leveraged in products like garden chairs and other durable household goods.
- Writing Instruments: The resin is also used for producing parts for pens and glue sticks, where good dimensional stability and a smooth finish are important.
