High-Density Polyethylene (HDPE)
Core Performance Overview
✔ Mechanical Properties
● Tensile Strength: 26–37 MPa, significantly higher than LDPE (Low-Density Polyethylene).
● Elongation at Break: 500%–700%, providing exceptional ductility.
● Impact Resistance: Maintains good toughness at cryogenic temperatures (-40°C/-40°F), suitable for cold-climate applications.
✔ Chemical Stability
● Resistant to acids, alkalis, salts, and most organic solvents.
● Limited resistance to strong oxidizers (e.g., concentrated nitric acid) and aromatic hydrocarbons.
● Water absorption <0.01% with superior water vapor barrier performance.
● Ideal for moisture-proof packaging and water treatment infrastructure.
✔ Thermal Properties
● Melting point: 120–135°C (248–275°F)
● Recommended processing temperature: 190–230°C (374–446°F)
● Vicat softening point: ~120–130°C (248–266°F)
● Good thermal stability but degrades above 200°C (392°F)
✔ Additional Characteristics
● Excellent electrical insulation, particularly outstanding high-frequency dielectric properties. Commonly used for cable jacketing.
● Superior Environmental Stress Cracking Resistance (ESCR).
● Poor UV aging resistance, requiring UV stabilizers for outdoor applications.