HDPE

HDPE (High-Density Polyethylene) – Product Specifications

HDPE is a strong, durable, and lightweight thermoplastic known for its high tensile strength, excellent chemical resistance, and low moisture absorption. It has a linear structure with minimal branching, giving it higher density and greater crystallinity compared to LDPE and LLDPE. HDPE is widely used in rigid packaging, piping, and industrial applications where strength and durability are required.

Key Parameters:

• Density: 0.941 – 0.970 g/cm³

• Melt Flow Index (MFI / MI): 0.1 – 15 g/10min (grade dependent; blow molding grades: 0.1 – 1.0; injection molding grades: 3 – 15)

• Tensile Strength (Yield): 20 – 35 MPa

• Tensile Strength (Break): 15 – 30 MPa

• Elongation at Break: 100 – 800% (grade dependent)

• Flexural Modulus: 800 – 1500 MPa

• Flexural Strength: 25 – 40 MPa

• Izod Impact Strength (notched): 2 – 8 kJ/m²

• Shore Hardness (D scale): 60 – 70

• Vicat Softening Point: 120 – 130°C

• Melting Point: 125 – 135°C

• Brittleness Temperature: < -70°C (excellent low-temperature performance)

• Heat Deflection Temperature (HDT): 45 – 65°C (at 1.82 MPa) / 70 – 85°C (at 0.45 MPa)

• Water Absorption (24h): < 0.01% (negligible)

• Mold Shrinkage: 1.5 – 4.0% (depending on processing conditions)

• Flame Rating (UL94): HB

• Processing Methods: Injection molding, blow molding (bottles, containers), extrusion (pipe, sheet), rotomolding, thermoforming

• Typical Applications: Bottles (milk, detergent, shampoo, juice), industrial drums and jerry cans, pipes for water and gas distribution, pipe fittings and conduits, crates and pallets, childproof caps and closures, fuel tanks, rotomolded kayaks and playground equipment, toy parts, food storage containers, garbage bins, shopping bags (film grade), industrial containers and totes (including IBCs), housewares (cutting boards, bowls, buckets), woven sacks (tape grade), sheet plastic for fabrication, geomembranes and pond liners (specialty grade), offshore aquaculture netting and buoys (high environmental stress crack resistance – HMW / UHMW variants)