HDPE Plastic Injection Molding

High-density resin used for past that require excellent durability and strong impact resistance

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What is High-density Polyethylene (HDPE)?

High-density polyethylene (HDPE) is a resin found typically in pellet form, intended to be used in injection molding applications designed to withstand high impact, possess high-stress crack resistance, and have extreme durability. HDPE is also designed to provide excellent processability for molders.

What is HDPE Used For?

Applications using HDPE are highly sustainable due to the resin's extreme durability. High-density polyethylene's high strength-to-density composition and versatility make it an extremely popular plastic that serves the needs of a wide array of industries.

  • Industrial pails
  • Industrial parts
  • Shipping containers
  • Molded crates
  • Cases
  • Totes
  • Parts that require high modulus

Injection-Molded HDPE Material Properties 

 

Density
ASTM D792

Tensile Strength
ASTM D638
Elongation at Break
ASTM D638
Hardness (Shore D)
ASTM D2240
Heat Deflection
ASTM D648
Unipol DMDA 8007 0.967 g/cm3 31.0 MPa 350% 61 83.9 C
Marlex 9006 HID 0.953 g/cm3 28.0 MPa 950% 62 n/a*
Dow DMDA 8907 0.952 g/cm3 27.0 MPa 1,100% 59 73.0 C

*Resin has not been tested for this property


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Characteristics and Applications of Various HDPE Plastics

In general, HDPE provides excellent stiffness and is highly warp resistant. HDPE is typically lower in cost and has great chemical and impact resistance.

Marlex 9006
  • High impact resistance
  • Good stiffness, durable
  • Food contact acceptable
  • Highly sustainable
  • Recyclable material

Applications: Industrial pails, automotive applications, and foamed parts

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DOW DMDA-8007 NT 7
  • Narrow molecular weight distribution
  • Designed for excellent stiffness
  • Low warpage
  • Good toughness

Applications: Molded crates, cases, trays, tote bins, and other objects requiring high rigidity

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DOW DMDA-8907 NT 7
  • Designed for excellent processability to molders
  • Superb impact strength
  • Terrific environmental stress crack resistance
  • Narrow molecular weight distribution
  • Meets rigorous performance characteristics of applications requiring stackability

Applications: Industrial parts, and a variety of shipping containers

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