Colored HDPE Polyethylene Round Bar HDPE Rod

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Product details

Colored HDPE Polyethylene Round Bar HDPE Rod

Basic Physical Properties

Density: 0.96 g/cm³. Lighter than water (floats on water), only 1/8 that of steel and 1/3 that of aluminum, making it suitable for weight-sensitive applications.

Colors: White (most common, natural color of raw material), black (with carbon black or other fillers added), blue/green/gray (customizable). White HDPE rods are commonly used in the food and medical industries due to their high purity; black is often used for outdoor use or applications requiring UV resistance.

Surface: Smooth cylindrical surface (naturally formed during the extrusion process), burr-free edges, chamfering or frosted finishes available upon request. The fine surface and low coefficient of friction make it suitable for sliding fit with other components.

Mechanical Properties

Although HDPE rods are plastic, their high-density molecular structure achieves high strength and toughness. Key parameters are as follows:

Tensile Strength: 29 MPa (approximately 1/10 that of mild steel, but higher than the 25-30 MPa of common plastics such as PP);
Flexural Strength: 25-45 MPa (excellent resistance to bending deformation, suitable for structural parts carrying small and medium loads);
Notched Impact Strength: 20 kJ/m² (unnotched impact strength is higher, reaching 50-100 kJ/m²) (maintains toughness even at low temperatures and resists brittle cracking);
Shore Hardness: 62 (much lower than metal, but higher than the wear-resistant requirements of engineering plastics such as nylon);
Compressive Strength: 15-25 MPa (suitable for withstanding uniformly distributed static pressure, such as in pads and support columns).

Typical Features: HDPE rods offer the advantages of "high toughness and low brittleness"—even at low temperatures (-40°C), they can withstand bending and impact tests without breaking (a significant contrast to the low-temperature brittleness of common plastics such as PS and PVC).

High Density Polyethylene Rod

Environmental Resistance

Corrosion Resistance: They are virtually unreactive with all chemicals (except for strong oxidizers such as concentrated nitric acid and sulfuric acid). They are resistant to acids (such as hydrochloric acid and phosphoric acid), alkalis (such as sodium hydroxide), saline solutions (such as brine), and organic solvents (such as ethanol and gasoline). They exhibit no swelling, dissolution, or stress cracking after long-term immersion (widely used in chemical corrosion protection applications).

Temperature Resistance: Long-term operating temperature range: -60°C to 60°C (short-term resistance to 80°C) (gradually softens at high temperatures, and strength decreases significantly above 60°C).

Weather Resistance: UV inhibitors must be added for outdoor use (otherwise, prolonged UV exposure can cause molecular chain breakage, brittleness, and discoloration).

Water Absorption: Extremely low (equilibrium water absorption ≤ 0.01%) (Extremely high dimensional stability, with virtually no expansion or deformation in humid environments, making it suitable for insulation or support of precision components).

Abrasion Resistance: Better than most general-purpose plastics (such as PP and PVC), but slightly lower than ultra-high molecular weight polyethylene (UHMWPE). The surface is smooth, with a coefficient of friction of only 0.1-0.2 (when in contact with steel), making it suitable for low-friction sliding applications.

Electrical Properties

Insulation: With a volume resistivity of 10¹⁵ Ω·cm and a dielectric strength of ≥20 kV/mm (second only to top-tier insulating materials like PTFE), it is an excellent electrical insulator and suitable for insulating components in high-voltage or high-frequency environments (such as junction box supports and electronic instrument pads).

Typical Application Scenarios

Industrial and Mechanical Industries

Wear-Resistant Liners/Sleeves: Used for conveyor belt guides, roller lagging (replacing metal to reduce wear), and small motor bushings (corrosion-resistant and self-lubricating).

Structural Support Parts: Equipment frame connectors, light-load platform supports (such as laboratory instrument bases and auxiliary structures for chemical equipment).

Chemical and Environmental Protection Industries

Corrosion-Resistant Pipe Fittings: Reactor agitator sleeves, sealing gaskets for acid and alkali pipelines (resistant to sulfuric acid, sodium hydroxide, and other reagents).

Filtration and Separation Components: Wear-resistant linings for chemical fluid transportation (such as pipe elbow protective sleeves), and gratings for sewage treatment equipment.

Food and Pharmaceutical Industries

Food Processing Parts: Mixer blades (FDA-compliant), baking mold supports (non-toxic and temperature-resistant ≤80°C).

Medical Auxiliary Devices: Support structures for pharmaceutical packaging, laboratory culture dish holders (easy to clean and corrosion-resistant).

Construction and Civilian Applications

Outdoor Facilities: Park chair brackets, pavilion sunshade supports (lightweight and corrosion-resistant).

Household Appliances: Washing machine drain pipe connectors (scale-resistant), plastic flower pot brackets (rust-resistant).

Special Customizations

Insulating Components: Plastic bases for electronic components (requires additional anti-static treatment), insulating partitions for high-voltage equipment (suitable for low-voltage applications).

Wear-Resistant Sports Equipment: Joint components for fitness equipment (such as treadmill rails), ski mounting brackets (low friction and low-temperature resistance).