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Materials Guide
High-Density Polyethylene (HDPE)
High-Density Polyethylene (HDPE) is a tough, lightweight thermoplastic recognized for its strength, rigidity, and exceptional chemical resistance. It offers low moisture absorption and excellent impact durability, making it one of the most widely used and versatile materials in extrusion.
What is HDPE?
HDPE is a polymer made from petroleum-derived ethylene monomers that are densely packed to create strong molecular bonds. This high-density structure gives the material its rigidity, tensile strength, and resistance to chemicals and environmental stress cracking. Unlike lower-density polyethylene, HDPE maintains its shape under load and performs reliably across a broad temperature range.
Common Applications
HDPE is used in industries where durability, moisture resistance, and chemical stability are critical. Typical applications include:
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Piping and conduit systems
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Industrial containers and liners
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Extruded profiles and protective covers
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Marine and outdoor components
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Sheets, panels, and construction products
Fun Fact: HDPE is the material behind everyday milk jugs, cutting boards, and even playground equipment. Its recyclability and strength have made it one of the world’s most widely produced plastics.
Important Considerations
Benefits
- Excellent chemical and moisture resistance
- High strength-to-density ratio
- Superior impact resistance, even at low temperatures
- Excellent processability for extrusion and molding
- UV-stabilized grades available for outdoor use
Limitations
- Can become brittle under prolonged UV exposure without additives
- Lower temperature resistance compared to some engineering plastics
- Difficult to bond or paint without surface treatment
- Not inherently flame retardant
Custom PVC Extrusion with Engineered Profiles
Engineered Profiles has decades of experience working with PVC in both rigid and flexible forms. Our ability to fine-tune formulations, combined with precision extrusion and fabrication, ensures PVC profiles that balance performance, durability, and cost efficiency across industries.
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