Type: High-Density Polyethylene (HDPE)
Grade: HD3840UA
 
Features and Characteristics
Characteristics: HD3840UA is a linear, UV stabilized medium density polyethylene copolymer (MDPE) with a narrow molecular weight distribution. It is known for its high stiffness, good impact stress resistance, excellent processability, and superb surface finish quality both internally and externally.
Quality: The UV stabilization enhances the material's suitability for outdoor applications by providing excellent resistance to UV degradation. This grade is noted for its whiteness and good stress cracking resistance.
 
General Information
Status: Commercial, Active
Applications: This grade is primarily used for rotational molded items that require good stiffness, such as septic tanks and ordinary containers. It is also suitable for injection molded technical parts and closures.
Form: Available in pellet form.
Food Contact: This material is suitable for food contact applications, ensuring safety and compliance with health regulations.
 
Additives
Included Additives:
UV Stabilizers: To enhance resistance to ultraviolet light degradation.
Antioxidants: To prevent oxidative degradation during processing and usage.
 
Material Properties
Melt Flow Index (MFI) at 190°C, 2.16 kg: 3.8 - 4.5 g/10 min (ASTM D-1238), indicating the material’s flow characteristics during processing.
Density: 0.935-0.939 g/cm³ (ASTM D-1505), contributing to the material's structural strength and stability.
Tensile Strength at Yield: 18 MPa (ASTM D-638), showcasing the material's ability to withstand stress before deforming.
Elongation at Break: 1000% (ASTM D-638), demonstrating exceptional flexibility and stretchability.
Flexural Modulus: 700 MPa (ASTM D-790), reflecting the material's stiffness and resistance to bending.
Charpy Impact Resistance (Notched): 20 Kj/m² (ASTM D-256), indicating good impact resistance.
 
Conclusion
HDPE HD3840UA is specifically formulated for rotational moulding applications, providing a unique blend of stiffness, UV resistance, and impact strength. This grade is well-suited for producing durable items that are exposed to environmental stresses, ensuring longevity and reliability in applications such as septic tanks and industrial containers.